2 * Copyright © 2012 Intel Corporation
4 * Permission is hereby granted, free of charge, to any person obtaining a
5 * copy of this software and associated documentation files (the "Software"),
6 * to deal in the Software without restriction, including without limitation
7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
8 * and/or sell copies of the Software, and to permit persons to whom the
9 * Software is furnished to do so, subject to the following conditions:
11 * The above copyright notice and this permission notice (including the next
12 * paragraph) shall be included in all copies or substantial portions of the
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
18 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
19 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
20 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
24 * Eugeni Dodonov <eugeni.dodonov@intel.com>
28 #include <linux/cpufreq.h>
29 #include <drm/drm_plane_helper.h>
31 #include "intel_drv.h"
32 #include "../../../platform/x86/intel_ips.h"
33 #include <linux/module.h>
38 * RC6 is a special power stage which allows the GPU to enter an very
39 * low-voltage mode when idle, using down to 0V while at this stage. This
40 * stage is entered automatically when the GPU is idle when RC6 support is
41 * enabled, and as soon as new workload arises GPU wakes up automatically as well.
43 * There are different RC6 modes available in Intel GPU, which differentiate
44 * among each other with the latency required to enter and leave RC6 and
45 * voltage consumed by the GPU in different states.
47 * The combination of the following flags define which states GPU is allowed
48 * to enter, while RC6 is the normal RC6 state, RC6p is the deep RC6, and
49 * RC6pp is deepest RC6. Their support by hardware varies according to the
50 * GPU, BIOS, chipset and platform. RC6 is usually the safest one and the one
51 * which brings the most power savings; deeper states save more power, but
52 * require higher latency to switch to and wake up.
54 #define INTEL_RC6_ENABLE (1<<0)
55 #define INTEL_RC6p_ENABLE (1<<1)
56 #define INTEL_RC6pp_ENABLE (1<<2)
58 static void gen9_init_clock_gating(struct drm_device
*dev
)
60 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
62 /* See Bspec note for PSR2_CTL bit 31, Wa#828:skl,bxt,kbl */
63 I915_WRITE(CHICKEN_PAR1_1
,
64 I915_READ(CHICKEN_PAR1_1
) | SKL_EDP_PSR_FIX_RDWRAP
);
66 I915_WRITE(GEN8_CONFIG0
,
67 I915_READ(GEN8_CONFIG0
) | GEN9_DEFAULT_FIXES
);
69 /* WaEnableChickenDCPR:skl,bxt,kbl */
70 I915_WRITE(GEN8_CHICKEN_DCPR_1
,
71 I915_READ(GEN8_CHICKEN_DCPR_1
) | MASK_WAKEMEM
);
73 /* WaFbcTurnOffFbcWatermark:skl,bxt,kbl */
74 /* WaFbcWakeMemOn:skl,bxt,kbl */
75 I915_WRITE(DISP_ARB_CTL
, I915_READ(DISP_ARB_CTL
) |
77 DISP_FBC_MEMORY_WAKE
);
79 /* WaFbcHighMemBwCorruptionAvoidance:skl,bxt,kbl */
80 I915_WRITE(ILK_DPFC_CHICKEN
, I915_READ(ILK_DPFC_CHICKEN
) |
81 ILK_DPFC_DISABLE_DUMMY0
);
84 static void bxt_init_clock_gating(struct drm_device
*dev
)
86 struct drm_i915_private
*dev_priv
= to_i915(dev
);
88 gen9_init_clock_gating(dev
);
90 /* WaDisableSDEUnitClockGating:bxt */
91 I915_WRITE(GEN8_UCGCTL6
, I915_READ(GEN8_UCGCTL6
) |
92 GEN8_SDEUNIT_CLOCK_GATE_DISABLE
);
96 * GEN8_HDCUNIT_CLOCK_GATE_DISABLE_HDCREQ applies on 3x6 GT SKUs only.
98 I915_WRITE(GEN8_UCGCTL6
, I915_READ(GEN8_UCGCTL6
) |
99 GEN8_HDCUNIT_CLOCK_GATE_DISABLE_HDCREQ
);
102 * Wa: Backlight PWM may stop in the asserted state, causing backlight
105 if (IS_BXT_REVID(dev_priv
, BXT_REVID_B0
, REVID_FOREVER
))
106 I915_WRITE(GEN9_CLKGATE_DIS_0
, I915_READ(GEN9_CLKGATE_DIS_0
) |
107 PWM1_GATING_DIS
| PWM2_GATING_DIS
);
110 static void i915_pineview_get_mem_freq(struct drm_device
*dev
)
112 struct drm_i915_private
*dev_priv
= to_i915(dev
);
115 tmp
= I915_READ(CLKCFG
);
117 switch (tmp
& CLKCFG_FSB_MASK
) {
119 dev_priv
->fsb_freq
= 533; /* 133*4 */
122 dev_priv
->fsb_freq
= 800; /* 200*4 */
125 dev_priv
->fsb_freq
= 667; /* 167*4 */
128 dev_priv
->fsb_freq
= 400; /* 100*4 */
132 switch (tmp
& CLKCFG_MEM_MASK
) {
134 dev_priv
->mem_freq
= 533;
137 dev_priv
->mem_freq
= 667;
140 dev_priv
->mem_freq
= 800;
144 /* detect pineview DDR3 setting */
145 tmp
= I915_READ(CSHRDDR3CTL
);
146 dev_priv
->is_ddr3
= (tmp
& CSHRDDR3CTL_DDR3
) ? 1 : 0;
149 static void i915_ironlake_get_mem_freq(struct drm_device
*dev
)
151 struct drm_i915_private
*dev_priv
= to_i915(dev
);
154 ddrpll
= I915_READ16(DDRMPLL1
);
155 csipll
= I915_READ16(CSIPLL0
);
157 switch (ddrpll
& 0xff) {
159 dev_priv
->mem_freq
= 800;
162 dev_priv
->mem_freq
= 1066;
165 dev_priv
->mem_freq
= 1333;
168 dev_priv
->mem_freq
= 1600;
171 DRM_DEBUG_DRIVER("unknown memory frequency 0x%02x\n",
173 dev_priv
->mem_freq
= 0;
177 dev_priv
->ips
.r_t
= dev_priv
->mem_freq
;
179 switch (csipll
& 0x3ff) {
181 dev_priv
->fsb_freq
= 3200;
184 dev_priv
->fsb_freq
= 3733;
187 dev_priv
->fsb_freq
= 4266;
190 dev_priv
->fsb_freq
= 4800;
193 dev_priv
->fsb_freq
= 5333;
196 dev_priv
->fsb_freq
= 5866;
199 dev_priv
->fsb_freq
= 6400;
202 DRM_DEBUG_DRIVER("unknown fsb frequency 0x%04x\n",
204 dev_priv
->fsb_freq
= 0;
208 if (dev_priv
->fsb_freq
== 3200) {
209 dev_priv
->ips
.c_m
= 0;
210 } else if (dev_priv
->fsb_freq
> 3200 && dev_priv
->fsb_freq
<= 4800) {
211 dev_priv
->ips
.c_m
= 1;
213 dev_priv
->ips
.c_m
= 2;
217 static const struct cxsr_latency cxsr_latency_table
[] = {
218 {1, 0, 800, 400, 3382, 33382, 3983, 33983}, /* DDR2-400 SC */
219 {1, 0, 800, 667, 3354, 33354, 3807, 33807}, /* DDR2-667 SC */
220 {1, 0, 800, 800, 3347, 33347, 3763, 33763}, /* DDR2-800 SC */
221 {1, 1, 800, 667, 6420, 36420, 6873, 36873}, /* DDR3-667 SC */
222 {1, 1, 800, 800, 5902, 35902, 6318, 36318}, /* DDR3-800 SC */
224 {1, 0, 667, 400, 3400, 33400, 4021, 34021}, /* DDR2-400 SC */
225 {1, 0, 667, 667, 3372, 33372, 3845, 33845}, /* DDR2-667 SC */
226 {1, 0, 667, 800, 3386, 33386, 3822, 33822}, /* DDR2-800 SC */
227 {1, 1, 667, 667, 6438, 36438, 6911, 36911}, /* DDR3-667 SC */
228 {1, 1, 667, 800, 5941, 35941, 6377, 36377}, /* DDR3-800 SC */
230 {1, 0, 400, 400, 3472, 33472, 4173, 34173}, /* DDR2-400 SC */
231 {1, 0, 400, 667, 3443, 33443, 3996, 33996}, /* DDR2-667 SC */
232 {1, 0, 400, 800, 3430, 33430, 3946, 33946}, /* DDR2-800 SC */
233 {1, 1, 400, 667, 6509, 36509, 7062, 37062}, /* DDR3-667 SC */
234 {1, 1, 400, 800, 5985, 35985, 6501, 36501}, /* DDR3-800 SC */
236 {0, 0, 800, 400, 3438, 33438, 4065, 34065}, /* DDR2-400 SC */
237 {0, 0, 800, 667, 3410, 33410, 3889, 33889}, /* DDR2-667 SC */
238 {0, 0, 800, 800, 3403, 33403, 3845, 33845}, /* DDR2-800 SC */
239 {0, 1, 800, 667, 6476, 36476, 6955, 36955}, /* DDR3-667 SC */
240 {0, 1, 800, 800, 5958, 35958, 6400, 36400}, /* DDR3-800 SC */
242 {0, 0, 667, 400, 3456, 33456, 4103, 34106}, /* DDR2-400 SC */
243 {0, 0, 667, 667, 3428, 33428, 3927, 33927}, /* DDR2-667 SC */
244 {0, 0, 667, 800, 3443, 33443, 3905, 33905}, /* DDR2-800 SC */
245 {0, 1, 667, 667, 6494, 36494, 6993, 36993}, /* DDR3-667 SC */
246 {0, 1, 667, 800, 5998, 35998, 6460, 36460}, /* DDR3-800 SC */
248 {0, 0, 400, 400, 3528, 33528, 4255, 34255}, /* DDR2-400 SC */
249 {0, 0, 400, 667, 3500, 33500, 4079, 34079}, /* DDR2-667 SC */
250 {0, 0, 400, 800, 3487, 33487, 4029, 34029}, /* DDR2-800 SC */
251 {0, 1, 400, 667, 6566, 36566, 7145, 37145}, /* DDR3-667 SC */
252 {0, 1, 400, 800, 6042, 36042, 6584, 36584}, /* DDR3-800 SC */
255 static const struct cxsr_latency
*intel_get_cxsr_latency(int is_desktop
,
260 const struct cxsr_latency
*latency
;
263 if (fsb
== 0 || mem
== 0)
266 for (i
= 0; i
< ARRAY_SIZE(cxsr_latency_table
); i
++) {
267 latency
= &cxsr_latency_table
[i
];
268 if (is_desktop
== latency
->is_desktop
&&
269 is_ddr3
== latency
->is_ddr3
&&
270 fsb
== latency
->fsb_freq
&& mem
== latency
->mem_freq
)
274 DRM_DEBUG_KMS("Unknown FSB/MEM found, disable CxSR\n");
279 static void chv_set_memory_dvfs(struct drm_i915_private
*dev_priv
, bool enable
)
283 mutex_lock(&dev_priv
->rps
.hw_lock
);
285 val
= vlv_punit_read(dev_priv
, PUNIT_REG_DDR_SETUP2
);
287 val
&= ~FORCE_DDR_HIGH_FREQ
;
289 val
|= FORCE_DDR_HIGH_FREQ
;
290 val
&= ~FORCE_DDR_LOW_FREQ
;
291 val
|= FORCE_DDR_FREQ_REQ_ACK
;
292 vlv_punit_write(dev_priv
, PUNIT_REG_DDR_SETUP2
, val
);
294 if (wait_for((vlv_punit_read(dev_priv
, PUNIT_REG_DDR_SETUP2
) &
295 FORCE_DDR_FREQ_REQ_ACK
) == 0, 3))
296 DRM_ERROR("timed out waiting for Punit DDR DVFS request\n");
298 mutex_unlock(&dev_priv
->rps
.hw_lock
);
301 static void chv_set_memory_pm5(struct drm_i915_private
*dev_priv
, bool enable
)
305 mutex_lock(&dev_priv
->rps
.hw_lock
);
307 val
= vlv_punit_read(dev_priv
, PUNIT_REG_DSPFREQ
);
309 val
|= DSP_MAXFIFO_PM5_ENABLE
;
311 val
&= ~DSP_MAXFIFO_PM5_ENABLE
;
312 vlv_punit_write(dev_priv
, PUNIT_REG_DSPFREQ
, val
);
314 mutex_unlock(&dev_priv
->rps
.hw_lock
);
317 #define FW_WM(value, plane) \
318 (((value) << DSPFW_ ## plane ## _SHIFT) & DSPFW_ ## plane ## _MASK)
320 void intel_set_memory_cxsr(struct drm_i915_private
*dev_priv
, bool enable
)
322 struct drm_device
*dev
= &dev_priv
->drm
;
325 if (IS_VALLEYVIEW(dev
) || IS_CHERRYVIEW(dev
)) {
326 I915_WRITE(FW_BLC_SELF_VLV
, enable
? FW_CSPWRDWNEN
: 0);
327 POSTING_READ(FW_BLC_SELF_VLV
);
328 dev_priv
->wm
.vlv
.cxsr
= enable
;
329 } else if (IS_G4X(dev
) || IS_CRESTLINE(dev
)) {
330 I915_WRITE(FW_BLC_SELF
, enable
? FW_BLC_SELF_EN
: 0);
331 POSTING_READ(FW_BLC_SELF
);
332 } else if (IS_PINEVIEW(dev
)) {
333 val
= I915_READ(DSPFW3
) & ~PINEVIEW_SELF_REFRESH_EN
;
334 val
|= enable
? PINEVIEW_SELF_REFRESH_EN
: 0;
335 I915_WRITE(DSPFW3
, val
);
336 POSTING_READ(DSPFW3
);
337 } else if (IS_I945G(dev
) || IS_I945GM(dev
)) {
338 val
= enable
? _MASKED_BIT_ENABLE(FW_BLC_SELF_EN
) :
339 _MASKED_BIT_DISABLE(FW_BLC_SELF_EN
);
340 I915_WRITE(FW_BLC_SELF
, val
);
341 POSTING_READ(FW_BLC_SELF
);
342 } else if (IS_I915GM(dev
)) {
344 * FIXME can't find a bit like this for 915G, and
345 * and yet it does have the related watermark in
346 * FW_BLC_SELF. What's going on?
348 val
= enable
? _MASKED_BIT_ENABLE(INSTPM_SELF_EN
) :
349 _MASKED_BIT_DISABLE(INSTPM_SELF_EN
);
350 I915_WRITE(INSTPM
, val
);
351 POSTING_READ(INSTPM
);
356 DRM_DEBUG_KMS("memory self-refresh is %s\n",
357 enable
? "enabled" : "disabled");
362 * Latency for FIFO fetches is dependent on several factors:
363 * - memory configuration (speed, channels)
365 * - current MCH state
366 * It can be fairly high in some situations, so here we assume a fairly
367 * pessimal value. It's a tradeoff between extra memory fetches (if we
368 * set this value too high, the FIFO will fetch frequently to stay full)
369 * and power consumption (set it too low to save power and we might see
370 * FIFO underruns and display "flicker").
372 * A value of 5us seems to be a good balance; safe for very low end
373 * platforms but not overly aggressive on lower latency configs.
375 static const int pessimal_latency_ns
= 5000;
377 #define VLV_FIFO_START(dsparb, dsparb2, lo_shift, hi_shift) \
378 ((((dsparb) >> (lo_shift)) & 0xff) | ((((dsparb2) >> (hi_shift)) & 0x1) << 8))
380 static int vlv_get_fifo_size(struct drm_device
*dev
,
381 enum pipe pipe
, int plane
)
383 struct drm_i915_private
*dev_priv
= to_i915(dev
);
384 int sprite0_start
, sprite1_start
, size
;
387 uint32_t dsparb
, dsparb2
, dsparb3
;
389 dsparb
= I915_READ(DSPARB
);
390 dsparb2
= I915_READ(DSPARB2
);
391 sprite0_start
= VLV_FIFO_START(dsparb
, dsparb2
, 0, 0);
392 sprite1_start
= VLV_FIFO_START(dsparb
, dsparb2
, 8, 4);
395 dsparb
= I915_READ(DSPARB
);
396 dsparb2
= I915_READ(DSPARB2
);
397 sprite0_start
= VLV_FIFO_START(dsparb
, dsparb2
, 16, 8);
398 sprite1_start
= VLV_FIFO_START(dsparb
, dsparb2
, 24, 12);
401 dsparb2
= I915_READ(DSPARB2
);
402 dsparb3
= I915_READ(DSPARB3
);
403 sprite0_start
= VLV_FIFO_START(dsparb3
, dsparb2
, 0, 16);
404 sprite1_start
= VLV_FIFO_START(dsparb3
, dsparb2
, 8, 20);
412 size
= sprite0_start
;
415 size
= sprite1_start
- sprite0_start
;
418 size
= 512 - 1 - sprite1_start
;
424 DRM_DEBUG_KMS("Pipe %c %s %c FIFO size: %d\n",
425 pipe_name(pipe
), plane
== 0 ? "primary" : "sprite",
426 plane
== 0 ? plane_name(pipe
) : sprite_name(pipe
, plane
- 1),
432 static int i9xx_get_fifo_size(struct drm_device
*dev
, int plane
)
434 struct drm_i915_private
*dev_priv
= to_i915(dev
);
435 uint32_t dsparb
= I915_READ(DSPARB
);
438 size
= dsparb
& 0x7f;
440 size
= ((dsparb
>> DSPARB_CSTART_SHIFT
) & 0x7f) - size
;
442 DRM_DEBUG_KMS("FIFO size - (0x%08x) %s: %d\n", dsparb
,
443 plane
? "B" : "A", size
);
448 static int i830_get_fifo_size(struct drm_device
*dev
, int plane
)
450 struct drm_i915_private
*dev_priv
= to_i915(dev
);
451 uint32_t dsparb
= I915_READ(DSPARB
);
454 size
= dsparb
& 0x1ff;
456 size
= ((dsparb
>> DSPARB_BEND_SHIFT
) & 0x1ff) - size
;
457 size
>>= 1; /* Convert to cachelines */
459 DRM_DEBUG_KMS("FIFO size - (0x%08x) %s: %d\n", dsparb
,
460 plane
? "B" : "A", size
);
465 static int i845_get_fifo_size(struct drm_device
*dev
, int plane
)
467 struct drm_i915_private
*dev_priv
= to_i915(dev
);
468 uint32_t dsparb
= I915_READ(DSPARB
);
471 size
= dsparb
& 0x7f;
472 size
>>= 2; /* Convert to cachelines */
474 DRM_DEBUG_KMS("FIFO size - (0x%08x) %s: %d\n", dsparb
,
481 /* Pineview has different values for various configs */
482 static const struct intel_watermark_params pineview_display_wm
= {
483 .fifo_size
= PINEVIEW_DISPLAY_FIFO
,
484 .max_wm
= PINEVIEW_MAX_WM
,
485 .default_wm
= PINEVIEW_DFT_WM
,
486 .guard_size
= PINEVIEW_GUARD_WM
,
487 .cacheline_size
= PINEVIEW_FIFO_LINE_SIZE
,
489 static const struct intel_watermark_params pineview_display_hplloff_wm
= {
490 .fifo_size
= PINEVIEW_DISPLAY_FIFO
,
491 .max_wm
= PINEVIEW_MAX_WM
,
492 .default_wm
= PINEVIEW_DFT_HPLLOFF_WM
,
493 .guard_size
= PINEVIEW_GUARD_WM
,
494 .cacheline_size
= PINEVIEW_FIFO_LINE_SIZE
,
496 static const struct intel_watermark_params pineview_cursor_wm
= {
497 .fifo_size
= PINEVIEW_CURSOR_FIFO
,
498 .max_wm
= PINEVIEW_CURSOR_MAX_WM
,
499 .default_wm
= PINEVIEW_CURSOR_DFT_WM
,
500 .guard_size
= PINEVIEW_CURSOR_GUARD_WM
,
501 .cacheline_size
= PINEVIEW_FIFO_LINE_SIZE
,
503 static const struct intel_watermark_params pineview_cursor_hplloff_wm
= {
504 .fifo_size
= PINEVIEW_CURSOR_FIFO
,
505 .max_wm
= PINEVIEW_CURSOR_MAX_WM
,
506 .default_wm
= PINEVIEW_CURSOR_DFT_WM
,
507 .guard_size
= PINEVIEW_CURSOR_GUARD_WM
,
508 .cacheline_size
= PINEVIEW_FIFO_LINE_SIZE
,
510 static const struct intel_watermark_params g4x_wm_info
= {
511 .fifo_size
= G4X_FIFO_SIZE
,
512 .max_wm
= G4X_MAX_WM
,
513 .default_wm
= G4X_MAX_WM
,
515 .cacheline_size
= G4X_FIFO_LINE_SIZE
,
517 static const struct intel_watermark_params g4x_cursor_wm_info
= {
518 .fifo_size
= I965_CURSOR_FIFO
,
519 .max_wm
= I965_CURSOR_MAX_WM
,
520 .default_wm
= I965_CURSOR_DFT_WM
,
522 .cacheline_size
= G4X_FIFO_LINE_SIZE
,
524 static const struct intel_watermark_params i965_cursor_wm_info
= {
525 .fifo_size
= I965_CURSOR_FIFO
,
526 .max_wm
= I965_CURSOR_MAX_WM
,
527 .default_wm
= I965_CURSOR_DFT_WM
,
529 .cacheline_size
= I915_FIFO_LINE_SIZE
,
531 static const struct intel_watermark_params i945_wm_info
= {
532 .fifo_size
= I945_FIFO_SIZE
,
533 .max_wm
= I915_MAX_WM
,
536 .cacheline_size
= I915_FIFO_LINE_SIZE
,
538 static const struct intel_watermark_params i915_wm_info
= {
539 .fifo_size
= I915_FIFO_SIZE
,
540 .max_wm
= I915_MAX_WM
,
543 .cacheline_size
= I915_FIFO_LINE_SIZE
,
545 static const struct intel_watermark_params i830_a_wm_info
= {
546 .fifo_size
= I855GM_FIFO_SIZE
,
547 .max_wm
= I915_MAX_WM
,
550 .cacheline_size
= I830_FIFO_LINE_SIZE
,
552 static const struct intel_watermark_params i830_bc_wm_info
= {
553 .fifo_size
= I855GM_FIFO_SIZE
,
554 .max_wm
= I915_MAX_WM
/2,
557 .cacheline_size
= I830_FIFO_LINE_SIZE
,
559 static const struct intel_watermark_params i845_wm_info
= {
560 .fifo_size
= I830_FIFO_SIZE
,
561 .max_wm
= I915_MAX_WM
,
564 .cacheline_size
= I830_FIFO_LINE_SIZE
,
568 * intel_calculate_wm - calculate watermark level
569 * @clock_in_khz: pixel clock
570 * @wm: chip FIFO params
571 * @cpp: bytes per pixel
572 * @latency_ns: memory latency for the platform
574 * Calculate the watermark level (the level at which the display plane will
575 * start fetching from memory again). Each chip has a different display
576 * FIFO size and allocation, so the caller needs to figure that out and pass
577 * in the correct intel_watermark_params structure.
579 * As the pixel clock runs, the FIFO will be drained at a rate that depends
580 * on the pixel size. When it reaches the watermark level, it'll start
581 * fetching FIFO line sized based chunks from memory until the FIFO fills
582 * past the watermark point. If the FIFO drains completely, a FIFO underrun
583 * will occur, and a display engine hang could result.
585 static unsigned long intel_calculate_wm(unsigned long clock_in_khz
,
586 const struct intel_watermark_params
*wm
,
587 int fifo_size
, int cpp
,
588 unsigned long latency_ns
)
590 long entries_required
, wm_size
;
593 * Note: we need to make sure we don't overflow for various clock &
595 * clocks go from a few thousand to several hundred thousand.
596 * latency is usually a few thousand
598 entries_required
= ((clock_in_khz
/ 1000) * cpp
* latency_ns
) /
600 entries_required
= DIV_ROUND_UP(entries_required
, wm
->cacheline_size
);
602 DRM_DEBUG_KMS("FIFO entries required for mode: %ld\n", entries_required
);
604 wm_size
= fifo_size
- (entries_required
+ wm
->guard_size
);
606 DRM_DEBUG_KMS("FIFO watermark level: %ld\n", wm_size
);
608 /* Don't promote wm_size to unsigned... */
609 if (wm_size
> (long)wm
->max_wm
)
610 wm_size
= wm
->max_wm
;
612 wm_size
= wm
->default_wm
;
615 * Bspec seems to indicate that the value shouldn't be lower than
616 * 'burst size + 1'. Certainly 830 is quite unhappy with low values.
617 * Lets go for 8 which is the burst size since certain platforms
618 * already use a hardcoded 8 (which is what the spec says should be
627 static struct drm_crtc
*single_enabled_crtc(struct drm_device
*dev
)
629 struct drm_crtc
*crtc
, *enabled
= NULL
;
631 for_each_crtc(dev
, crtc
) {
632 if (intel_crtc_active(crtc
)) {
642 static void pineview_update_wm(struct drm_crtc
*unused_crtc
)
644 struct drm_device
*dev
= unused_crtc
->dev
;
645 struct drm_i915_private
*dev_priv
= to_i915(dev
);
646 struct drm_crtc
*crtc
;
647 const struct cxsr_latency
*latency
;
651 latency
= intel_get_cxsr_latency(IS_PINEVIEW_G(dev
), dev_priv
->is_ddr3
,
652 dev_priv
->fsb_freq
, dev_priv
->mem_freq
);
654 DRM_DEBUG_KMS("Unknown FSB/MEM found, disable CxSR\n");
655 intel_set_memory_cxsr(dev_priv
, false);
659 crtc
= single_enabled_crtc(dev
);
661 const struct drm_display_mode
*adjusted_mode
= &to_intel_crtc(crtc
)->config
->base
.adjusted_mode
;
662 int cpp
= drm_format_plane_cpp(crtc
->primary
->state
->fb
->pixel_format
, 0);
663 int clock
= adjusted_mode
->crtc_clock
;
666 wm
= intel_calculate_wm(clock
, &pineview_display_wm
,
667 pineview_display_wm
.fifo_size
,
668 cpp
, latency
->display_sr
);
669 reg
= I915_READ(DSPFW1
);
670 reg
&= ~DSPFW_SR_MASK
;
671 reg
|= FW_WM(wm
, SR
);
672 I915_WRITE(DSPFW1
, reg
);
673 DRM_DEBUG_KMS("DSPFW1 register is %x\n", reg
);
676 wm
= intel_calculate_wm(clock
, &pineview_cursor_wm
,
677 pineview_display_wm
.fifo_size
,
678 cpp
, latency
->cursor_sr
);
679 reg
= I915_READ(DSPFW3
);
680 reg
&= ~DSPFW_CURSOR_SR_MASK
;
681 reg
|= FW_WM(wm
, CURSOR_SR
);
682 I915_WRITE(DSPFW3
, reg
);
684 /* Display HPLL off SR */
685 wm
= intel_calculate_wm(clock
, &pineview_display_hplloff_wm
,
686 pineview_display_hplloff_wm
.fifo_size
,
687 cpp
, latency
->display_hpll_disable
);
688 reg
= I915_READ(DSPFW3
);
689 reg
&= ~DSPFW_HPLL_SR_MASK
;
690 reg
|= FW_WM(wm
, HPLL_SR
);
691 I915_WRITE(DSPFW3
, reg
);
693 /* cursor HPLL off SR */
694 wm
= intel_calculate_wm(clock
, &pineview_cursor_hplloff_wm
,
695 pineview_display_hplloff_wm
.fifo_size
,
696 cpp
, latency
->cursor_hpll_disable
);
697 reg
= I915_READ(DSPFW3
);
698 reg
&= ~DSPFW_HPLL_CURSOR_MASK
;
699 reg
|= FW_WM(wm
, HPLL_CURSOR
);
700 I915_WRITE(DSPFW3
, reg
);
701 DRM_DEBUG_KMS("DSPFW3 register is %x\n", reg
);
703 intel_set_memory_cxsr(dev_priv
, true);
705 intel_set_memory_cxsr(dev_priv
, false);
709 static bool g4x_compute_wm0(struct drm_device
*dev
,
711 const struct intel_watermark_params
*display
,
712 int display_latency_ns
,
713 const struct intel_watermark_params
*cursor
,
714 int cursor_latency_ns
,
718 struct drm_crtc
*crtc
;
719 const struct drm_display_mode
*adjusted_mode
;
720 int htotal
, hdisplay
, clock
, cpp
;
721 int line_time_us
, line_count
;
722 int entries
, tlb_miss
;
724 crtc
= intel_get_crtc_for_plane(dev
, plane
);
725 if (!intel_crtc_active(crtc
)) {
726 *cursor_wm
= cursor
->guard_size
;
727 *plane_wm
= display
->guard_size
;
731 adjusted_mode
= &to_intel_crtc(crtc
)->config
->base
.adjusted_mode
;
732 clock
= adjusted_mode
->crtc_clock
;
733 htotal
= adjusted_mode
->crtc_htotal
;
734 hdisplay
= to_intel_crtc(crtc
)->config
->pipe_src_w
;
735 cpp
= drm_format_plane_cpp(crtc
->primary
->state
->fb
->pixel_format
, 0);
737 /* Use the small buffer method to calculate plane watermark */
738 entries
= ((clock
* cpp
/ 1000) * display_latency_ns
) / 1000;
739 tlb_miss
= display
->fifo_size
*display
->cacheline_size
- hdisplay
* 8;
742 entries
= DIV_ROUND_UP(entries
, display
->cacheline_size
);
743 *plane_wm
= entries
+ display
->guard_size
;
744 if (*plane_wm
> (int)display
->max_wm
)
745 *plane_wm
= display
->max_wm
;
747 /* Use the large buffer method to calculate cursor watermark */
748 line_time_us
= max(htotal
* 1000 / clock
, 1);
749 line_count
= (cursor_latency_ns
/ line_time_us
+ 1000) / 1000;
750 entries
= line_count
* crtc
->cursor
->state
->crtc_w
* cpp
;
751 tlb_miss
= cursor
->fifo_size
*cursor
->cacheline_size
- hdisplay
* 8;
754 entries
= DIV_ROUND_UP(entries
, cursor
->cacheline_size
);
755 *cursor_wm
= entries
+ cursor
->guard_size
;
756 if (*cursor_wm
> (int)cursor
->max_wm
)
757 *cursor_wm
= (int)cursor
->max_wm
;
763 * Check the wm result.
765 * If any calculated watermark values is larger than the maximum value that
766 * can be programmed into the associated watermark register, that watermark
769 static bool g4x_check_srwm(struct drm_device
*dev
,
770 int display_wm
, int cursor_wm
,
771 const struct intel_watermark_params
*display
,
772 const struct intel_watermark_params
*cursor
)
774 DRM_DEBUG_KMS("SR watermark: display plane %d, cursor %d\n",
775 display_wm
, cursor_wm
);
777 if (display_wm
> display
->max_wm
) {
778 DRM_DEBUG_KMS("display watermark is too large(%d/%ld), disabling\n",
779 display_wm
, display
->max_wm
);
783 if (cursor_wm
> cursor
->max_wm
) {
784 DRM_DEBUG_KMS("cursor watermark is too large(%d/%ld), disabling\n",
785 cursor_wm
, cursor
->max_wm
);
789 if (!(display_wm
|| cursor_wm
)) {
790 DRM_DEBUG_KMS("SR latency is 0, disabling\n");
797 static bool g4x_compute_srwm(struct drm_device
*dev
,
800 const struct intel_watermark_params
*display
,
801 const struct intel_watermark_params
*cursor
,
802 int *display_wm
, int *cursor_wm
)
804 struct drm_crtc
*crtc
;
805 const struct drm_display_mode
*adjusted_mode
;
806 int hdisplay
, htotal
, cpp
, clock
;
807 unsigned long line_time_us
;
808 int line_count
, line_size
;
813 *display_wm
= *cursor_wm
= 0;
817 crtc
= intel_get_crtc_for_plane(dev
, plane
);
818 adjusted_mode
= &to_intel_crtc(crtc
)->config
->base
.adjusted_mode
;
819 clock
= adjusted_mode
->crtc_clock
;
820 htotal
= adjusted_mode
->crtc_htotal
;
821 hdisplay
= to_intel_crtc(crtc
)->config
->pipe_src_w
;
822 cpp
= drm_format_plane_cpp(crtc
->primary
->state
->fb
->pixel_format
, 0);
824 line_time_us
= max(htotal
* 1000 / clock
, 1);
825 line_count
= (latency_ns
/ line_time_us
+ 1000) / 1000;
826 line_size
= hdisplay
* cpp
;
828 /* Use the minimum of the small and large buffer method for primary */
829 small
= ((clock
* cpp
/ 1000) * latency_ns
) / 1000;
830 large
= line_count
* line_size
;
832 entries
= DIV_ROUND_UP(min(small
, large
), display
->cacheline_size
);
833 *display_wm
= entries
+ display
->guard_size
;
835 /* calculate the self-refresh watermark for display cursor */
836 entries
= line_count
* cpp
* crtc
->cursor
->state
->crtc_w
;
837 entries
= DIV_ROUND_UP(entries
, cursor
->cacheline_size
);
838 *cursor_wm
= entries
+ cursor
->guard_size
;
840 return g4x_check_srwm(dev
,
841 *display_wm
, *cursor_wm
,
845 #define FW_WM_VLV(value, plane) \
846 (((value) << DSPFW_ ## plane ## _SHIFT) & DSPFW_ ## plane ## _MASK_VLV)
848 static void vlv_write_wm_values(struct intel_crtc
*crtc
,
849 const struct vlv_wm_values
*wm
)
851 struct drm_i915_private
*dev_priv
= to_i915(crtc
->base
.dev
);
852 enum pipe pipe
= crtc
->pipe
;
854 I915_WRITE(VLV_DDL(pipe
),
855 (wm
->ddl
[pipe
].cursor
<< DDL_CURSOR_SHIFT
) |
856 (wm
->ddl
[pipe
].sprite
[1] << DDL_SPRITE_SHIFT(1)) |
857 (wm
->ddl
[pipe
].sprite
[0] << DDL_SPRITE_SHIFT(0)) |
858 (wm
->ddl
[pipe
].primary
<< DDL_PLANE_SHIFT
));
861 FW_WM(wm
->sr
.plane
, SR
) |
862 FW_WM(wm
->pipe
[PIPE_B
].cursor
, CURSORB
) |
863 FW_WM_VLV(wm
->pipe
[PIPE_B
].primary
, PLANEB
) |
864 FW_WM_VLV(wm
->pipe
[PIPE_A
].primary
, PLANEA
));
866 FW_WM_VLV(wm
->pipe
[PIPE_A
].sprite
[1], SPRITEB
) |
867 FW_WM(wm
->pipe
[PIPE_A
].cursor
, CURSORA
) |
868 FW_WM_VLV(wm
->pipe
[PIPE_A
].sprite
[0], SPRITEA
));
870 FW_WM(wm
->sr
.cursor
, CURSOR_SR
));
872 if (IS_CHERRYVIEW(dev_priv
)) {
873 I915_WRITE(DSPFW7_CHV
,
874 FW_WM_VLV(wm
->pipe
[PIPE_B
].sprite
[1], SPRITED
) |
875 FW_WM_VLV(wm
->pipe
[PIPE_B
].sprite
[0], SPRITEC
));
876 I915_WRITE(DSPFW8_CHV
,
877 FW_WM_VLV(wm
->pipe
[PIPE_C
].sprite
[1], SPRITEF
) |
878 FW_WM_VLV(wm
->pipe
[PIPE_C
].sprite
[0], SPRITEE
));
879 I915_WRITE(DSPFW9_CHV
,
880 FW_WM_VLV(wm
->pipe
[PIPE_C
].primary
, PLANEC
) |
881 FW_WM(wm
->pipe
[PIPE_C
].cursor
, CURSORC
));
883 FW_WM(wm
->sr
.plane
>> 9, SR_HI
) |
884 FW_WM(wm
->pipe
[PIPE_C
].sprite
[1] >> 8, SPRITEF_HI
) |
885 FW_WM(wm
->pipe
[PIPE_C
].sprite
[0] >> 8, SPRITEE_HI
) |
886 FW_WM(wm
->pipe
[PIPE_C
].primary
>> 8, PLANEC_HI
) |
887 FW_WM(wm
->pipe
[PIPE_B
].sprite
[1] >> 8, SPRITED_HI
) |
888 FW_WM(wm
->pipe
[PIPE_B
].sprite
[0] >> 8, SPRITEC_HI
) |
889 FW_WM(wm
->pipe
[PIPE_B
].primary
>> 8, PLANEB_HI
) |
890 FW_WM(wm
->pipe
[PIPE_A
].sprite
[1] >> 8, SPRITEB_HI
) |
891 FW_WM(wm
->pipe
[PIPE_A
].sprite
[0] >> 8, SPRITEA_HI
) |
892 FW_WM(wm
->pipe
[PIPE_A
].primary
>> 8, PLANEA_HI
));
895 FW_WM_VLV(wm
->pipe
[PIPE_B
].sprite
[1], SPRITED
) |
896 FW_WM_VLV(wm
->pipe
[PIPE_B
].sprite
[0], SPRITEC
));
898 FW_WM(wm
->sr
.plane
>> 9, SR_HI
) |
899 FW_WM(wm
->pipe
[PIPE_B
].sprite
[1] >> 8, SPRITED_HI
) |
900 FW_WM(wm
->pipe
[PIPE_B
].sprite
[0] >> 8, SPRITEC_HI
) |
901 FW_WM(wm
->pipe
[PIPE_B
].primary
>> 8, PLANEB_HI
) |
902 FW_WM(wm
->pipe
[PIPE_A
].sprite
[1] >> 8, SPRITEB_HI
) |
903 FW_WM(wm
->pipe
[PIPE_A
].sprite
[0] >> 8, SPRITEA_HI
) |
904 FW_WM(wm
->pipe
[PIPE_A
].primary
>> 8, PLANEA_HI
));
907 /* zero (unused) WM1 watermarks */
908 I915_WRITE(DSPFW4
, 0);
909 I915_WRITE(DSPFW5
, 0);
910 I915_WRITE(DSPFW6
, 0);
911 I915_WRITE(DSPHOWM1
, 0);
913 POSTING_READ(DSPFW1
);
921 VLV_WM_LEVEL_DDR_DVFS
,
924 /* latency must be in 0.1us units. */
925 static unsigned int vlv_wm_method2(unsigned int pixel_rate
,
926 unsigned int pipe_htotal
,
927 unsigned int horiz_pixels
,
929 unsigned int latency
)
933 ret
= (latency
* pixel_rate
) / (pipe_htotal
* 10000);
934 ret
= (ret
+ 1) * horiz_pixels
* cpp
;
935 ret
= DIV_ROUND_UP(ret
, 64);
940 static void vlv_setup_wm_latency(struct drm_device
*dev
)
942 struct drm_i915_private
*dev_priv
= to_i915(dev
);
944 /* all latencies in usec */
945 dev_priv
->wm
.pri_latency
[VLV_WM_LEVEL_PM2
] = 3;
947 dev_priv
->wm
.max_level
= VLV_WM_LEVEL_PM2
;
949 if (IS_CHERRYVIEW(dev_priv
)) {
950 dev_priv
->wm
.pri_latency
[VLV_WM_LEVEL_PM5
] = 12;
951 dev_priv
->wm
.pri_latency
[VLV_WM_LEVEL_DDR_DVFS
] = 33;
953 dev_priv
->wm
.max_level
= VLV_WM_LEVEL_DDR_DVFS
;
957 static uint16_t vlv_compute_wm_level(struct intel_plane
*plane
,
958 struct intel_crtc
*crtc
,
959 const struct intel_plane_state
*state
,
962 struct drm_i915_private
*dev_priv
= to_i915(plane
->base
.dev
);
963 int clock
, htotal
, cpp
, width
, wm
;
965 if (dev_priv
->wm
.pri_latency
[level
] == 0)
968 if (!state
->base
.visible
)
971 cpp
= drm_format_plane_cpp(state
->base
.fb
->pixel_format
, 0);
972 clock
= crtc
->config
->base
.adjusted_mode
.crtc_clock
;
973 htotal
= crtc
->config
->base
.adjusted_mode
.crtc_htotal
;
974 width
= crtc
->config
->pipe_src_w
;
975 if (WARN_ON(htotal
== 0))
978 if (plane
->base
.type
== DRM_PLANE_TYPE_CURSOR
) {
980 * FIXME the formula gives values that are
981 * too big for the cursor FIFO, and hence we
982 * would never be able to use cursors. For
983 * now just hardcode the watermark.
987 wm
= vlv_wm_method2(clock
, htotal
, width
, cpp
,
988 dev_priv
->wm
.pri_latency
[level
] * 10);
991 return min_t(int, wm
, USHRT_MAX
);
994 static void vlv_compute_fifo(struct intel_crtc
*crtc
)
996 struct drm_device
*dev
= crtc
->base
.dev
;
997 struct vlv_wm_state
*wm_state
= &crtc
->wm_state
;
998 struct intel_plane
*plane
;
999 unsigned int total_rate
= 0;
1000 const int fifo_size
= 512 - 1;
1001 int fifo_extra
, fifo_left
= fifo_size
;
1003 for_each_intel_plane_on_crtc(dev
, crtc
, plane
) {
1004 struct intel_plane_state
*state
=
1005 to_intel_plane_state(plane
->base
.state
);
1007 if (plane
->base
.type
== DRM_PLANE_TYPE_CURSOR
)
1010 if (state
->base
.visible
) {
1011 wm_state
->num_active_planes
++;
1012 total_rate
+= drm_format_plane_cpp(state
->base
.fb
->pixel_format
, 0);
1016 for_each_intel_plane_on_crtc(dev
, crtc
, plane
) {
1017 struct intel_plane_state
*state
=
1018 to_intel_plane_state(plane
->base
.state
);
1021 if (plane
->base
.type
== DRM_PLANE_TYPE_CURSOR
) {
1022 plane
->wm
.fifo_size
= 63;
1026 if (!state
->base
.visible
) {
1027 plane
->wm
.fifo_size
= 0;
1031 rate
= drm_format_plane_cpp(state
->base
.fb
->pixel_format
, 0);
1032 plane
->wm
.fifo_size
= fifo_size
* rate
/ total_rate
;
1033 fifo_left
-= plane
->wm
.fifo_size
;
1036 fifo_extra
= DIV_ROUND_UP(fifo_left
, wm_state
->num_active_planes
?: 1);
1038 /* spread the remainder evenly */
1039 for_each_intel_plane_on_crtc(dev
, crtc
, plane
) {
1045 if (plane
->base
.type
== DRM_PLANE_TYPE_CURSOR
)
1048 /* give it all to the first plane if none are active */
1049 if (plane
->wm
.fifo_size
== 0 &&
1050 wm_state
->num_active_planes
)
1053 plane_extra
= min(fifo_extra
, fifo_left
);
1054 plane
->wm
.fifo_size
+= plane_extra
;
1055 fifo_left
-= plane_extra
;
1058 WARN_ON(fifo_left
!= 0);
1061 static void vlv_invert_wms(struct intel_crtc
*crtc
)
1063 struct vlv_wm_state
*wm_state
= &crtc
->wm_state
;
1066 for (level
= 0; level
< wm_state
->num_levels
; level
++) {
1067 struct drm_device
*dev
= crtc
->base
.dev
;
1068 const int sr_fifo_size
= INTEL_INFO(dev
)->num_pipes
* 512 - 1;
1069 struct intel_plane
*plane
;
1071 wm_state
->sr
[level
].plane
= sr_fifo_size
- wm_state
->sr
[level
].plane
;
1072 wm_state
->sr
[level
].cursor
= 63 - wm_state
->sr
[level
].cursor
;
1074 for_each_intel_plane_on_crtc(dev
, crtc
, plane
) {
1075 switch (plane
->base
.type
) {
1077 case DRM_PLANE_TYPE_CURSOR
:
1078 wm_state
->wm
[level
].cursor
= plane
->wm
.fifo_size
-
1079 wm_state
->wm
[level
].cursor
;
1081 case DRM_PLANE_TYPE_PRIMARY
:
1082 wm_state
->wm
[level
].primary
= plane
->wm
.fifo_size
-
1083 wm_state
->wm
[level
].primary
;
1085 case DRM_PLANE_TYPE_OVERLAY
:
1086 sprite
= plane
->plane
;
1087 wm_state
->wm
[level
].sprite
[sprite
] = plane
->wm
.fifo_size
-
1088 wm_state
->wm
[level
].sprite
[sprite
];
1095 static void vlv_compute_wm(struct intel_crtc
*crtc
)
1097 struct drm_device
*dev
= crtc
->base
.dev
;
1098 struct vlv_wm_state
*wm_state
= &crtc
->wm_state
;
1099 struct intel_plane
*plane
;
1100 int sr_fifo_size
= INTEL_INFO(dev
)->num_pipes
* 512 - 1;
1103 memset(wm_state
, 0, sizeof(*wm_state
));
1105 wm_state
->cxsr
= crtc
->pipe
!= PIPE_C
&& crtc
->wm
.cxsr_allowed
;
1106 wm_state
->num_levels
= to_i915(dev
)->wm
.max_level
+ 1;
1108 wm_state
->num_active_planes
= 0;
1110 vlv_compute_fifo(crtc
);
1112 if (wm_state
->num_active_planes
!= 1)
1113 wm_state
->cxsr
= false;
1115 if (wm_state
->cxsr
) {
1116 for (level
= 0; level
< wm_state
->num_levels
; level
++) {
1117 wm_state
->sr
[level
].plane
= sr_fifo_size
;
1118 wm_state
->sr
[level
].cursor
= 63;
1122 for_each_intel_plane_on_crtc(dev
, crtc
, plane
) {
1123 struct intel_plane_state
*state
=
1124 to_intel_plane_state(plane
->base
.state
);
1126 if (!state
->base
.visible
)
1129 /* normal watermarks */
1130 for (level
= 0; level
< wm_state
->num_levels
; level
++) {
1131 int wm
= vlv_compute_wm_level(plane
, crtc
, state
, level
);
1132 int max_wm
= plane
->base
.type
== DRM_PLANE_TYPE_CURSOR
? 63 : 511;
1135 if (WARN_ON(level
== 0 && wm
> max_wm
))
1138 if (wm
> plane
->wm
.fifo_size
)
1141 switch (plane
->base
.type
) {
1143 case DRM_PLANE_TYPE_CURSOR
:
1144 wm_state
->wm
[level
].cursor
= wm
;
1146 case DRM_PLANE_TYPE_PRIMARY
:
1147 wm_state
->wm
[level
].primary
= wm
;
1149 case DRM_PLANE_TYPE_OVERLAY
:
1150 sprite
= plane
->plane
;
1151 wm_state
->wm
[level
].sprite
[sprite
] = wm
;
1156 wm_state
->num_levels
= level
;
1158 if (!wm_state
->cxsr
)
1161 /* maxfifo watermarks */
1162 switch (plane
->base
.type
) {
1164 case DRM_PLANE_TYPE_CURSOR
:
1165 for (level
= 0; level
< wm_state
->num_levels
; level
++)
1166 wm_state
->sr
[level
].cursor
=
1167 wm_state
->wm
[level
].cursor
;
1169 case DRM_PLANE_TYPE_PRIMARY
:
1170 for (level
= 0; level
< wm_state
->num_levels
; level
++)
1171 wm_state
->sr
[level
].plane
=
1172 min(wm_state
->sr
[level
].plane
,
1173 wm_state
->wm
[level
].primary
);
1175 case DRM_PLANE_TYPE_OVERLAY
:
1176 sprite
= plane
->plane
;
1177 for (level
= 0; level
< wm_state
->num_levels
; level
++)
1178 wm_state
->sr
[level
].plane
=
1179 min(wm_state
->sr
[level
].plane
,
1180 wm_state
->wm
[level
].sprite
[sprite
]);
1185 /* clear any (partially) filled invalid levels */
1186 for (level
= wm_state
->num_levels
; level
< to_i915(dev
)->wm
.max_level
+ 1; level
++) {
1187 memset(&wm_state
->wm
[level
], 0, sizeof(wm_state
->wm
[level
]));
1188 memset(&wm_state
->sr
[level
], 0, sizeof(wm_state
->sr
[level
]));
1191 vlv_invert_wms(crtc
);
1194 #define VLV_FIFO(plane, value) \
1195 (((value) << DSPARB_ ## plane ## _SHIFT_VLV) & DSPARB_ ## plane ## _MASK_VLV)
1197 static void vlv_pipe_set_fifo_size(struct intel_crtc
*crtc
)
1199 struct drm_device
*dev
= crtc
->base
.dev
;
1200 struct drm_i915_private
*dev_priv
= to_i915(dev
);
1201 struct intel_plane
*plane
;
1202 int sprite0_start
= 0, sprite1_start
= 0, fifo_size
= 0;
1204 for_each_intel_plane_on_crtc(dev
, crtc
, plane
) {
1205 if (plane
->base
.type
== DRM_PLANE_TYPE_CURSOR
) {
1206 WARN_ON(plane
->wm
.fifo_size
!= 63);
1210 if (plane
->base
.type
== DRM_PLANE_TYPE_PRIMARY
)
1211 sprite0_start
= plane
->wm
.fifo_size
;
1212 else if (plane
->plane
== 0)
1213 sprite1_start
= sprite0_start
+ plane
->wm
.fifo_size
;
1215 fifo_size
= sprite1_start
+ plane
->wm
.fifo_size
;
1218 WARN_ON(fifo_size
!= 512 - 1);
1220 DRM_DEBUG_KMS("Pipe %c FIFO split %d / %d / %d\n",
1221 pipe_name(crtc
->pipe
), sprite0_start
,
1222 sprite1_start
, fifo_size
);
1224 switch (crtc
->pipe
) {
1225 uint32_t dsparb
, dsparb2
, dsparb3
;
1227 dsparb
= I915_READ(DSPARB
);
1228 dsparb2
= I915_READ(DSPARB2
);
1230 dsparb
&= ~(VLV_FIFO(SPRITEA
, 0xff) |
1231 VLV_FIFO(SPRITEB
, 0xff));
1232 dsparb
|= (VLV_FIFO(SPRITEA
, sprite0_start
) |
1233 VLV_FIFO(SPRITEB
, sprite1_start
));
1235 dsparb2
&= ~(VLV_FIFO(SPRITEA_HI
, 0x1) |
1236 VLV_FIFO(SPRITEB_HI
, 0x1));
1237 dsparb2
|= (VLV_FIFO(SPRITEA_HI
, sprite0_start
>> 8) |
1238 VLV_FIFO(SPRITEB_HI
, sprite1_start
>> 8));
1240 I915_WRITE(DSPARB
, dsparb
);
1241 I915_WRITE(DSPARB2
, dsparb2
);
1244 dsparb
= I915_READ(DSPARB
);
1245 dsparb2
= I915_READ(DSPARB2
);
1247 dsparb
&= ~(VLV_FIFO(SPRITEC
, 0xff) |
1248 VLV_FIFO(SPRITED
, 0xff));
1249 dsparb
|= (VLV_FIFO(SPRITEC
, sprite0_start
) |
1250 VLV_FIFO(SPRITED
, sprite1_start
));
1252 dsparb2
&= ~(VLV_FIFO(SPRITEC_HI
, 0xff) |
1253 VLV_FIFO(SPRITED_HI
, 0xff));
1254 dsparb2
|= (VLV_FIFO(SPRITEC_HI
, sprite0_start
>> 8) |
1255 VLV_FIFO(SPRITED_HI
, sprite1_start
>> 8));
1257 I915_WRITE(DSPARB
, dsparb
);
1258 I915_WRITE(DSPARB2
, dsparb2
);
1261 dsparb3
= I915_READ(DSPARB3
);
1262 dsparb2
= I915_READ(DSPARB2
);
1264 dsparb3
&= ~(VLV_FIFO(SPRITEE
, 0xff) |
1265 VLV_FIFO(SPRITEF
, 0xff));
1266 dsparb3
|= (VLV_FIFO(SPRITEE
, sprite0_start
) |
1267 VLV_FIFO(SPRITEF
, sprite1_start
));
1269 dsparb2
&= ~(VLV_FIFO(SPRITEE_HI
, 0xff) |
1270 VLV_FIFO(SPRITEF_HI
, 0xff));
1271 dsparb2
|= (VLV_FIFO(SPRITEE_HI
, sprite0_start
>> 8) |
1272 VLV_FIFO(SPRITEF_HI
, sprite1_start
>> 8));
1274 I915_WRITE(DSPARB3
, dsparb3
);
1275 I915_WRITE(DSPARB2
, dsparb2
);
1284 static void vlv_merge_wm(struct drm_device
*dev
,
1285 struct vlv_wm_values
*wm
)
1287 struct intel_crtc
*crtc
;
1288 int num_active_crtcs
= 0;
1290 wm
->level
= to_i915(dev
)->wm
.max_level
;
1293 for_each_intel_crtc(dev
, crtc
) {
1294 const struct vlv_wm_state
*wm_state
= &crtc
->wm_state
;
1299 if (!wm_state
->cxsr
)
1303 wm
->level
= min_t(int, wm
->level
, wm_state
->num_levels
- 1);
1306 if (num_active_crtcs
!= 1)
1309 if (num_active_crtcs
> 1)
1310 wm
->level
= VLV_WM_LEVEL_PM2
;
1312 for_each_intel_crtc(dev
, crtc
) {
1313 struct vlv_wm_state
*wm_state
= &crtc
->wm_state
;
1314 enum pipe pipe
= crtc
->pipe
;
1319 wm
->pipe
[pipe
] = wm_state
->wm
[wm
->level
];
1321 wm
->sr
= wm_state
->sr
[wm
->level
];
1323 wm
->ddl
[pipe
].primary
= DDL_PRECISION_HIGH
| 2;
1324 wm
->ddl
[pipe
].sprite
[0] = DDL_PRECISION_HIGH
| 2;
1325 wm
->ddl
[pipe
].sprite
[1] = DDL_PRECISION_HIGH
| 2;
1326 wm
->ddl
[pipe
].cursor
= DDL_PRECISION_HIGH
| 2;
1330 static void vlv_update_wm(struct drm_crtc
*crtc
)
1332 struct drm_device
*dev
= crtc
->dev
;
1333 struct drm_i915_private
*dev_priv
= to_i915(dev
);
1334 struct intel_crtc
*intel_crtc
= to_intel_crtc(crtc
);
1335 enum pipe pipe
= intel_crtc
->pipe
;
1336 struct vlv_wm_values wm
= {};
1338 vlv_compute_wm(intel_crtc
);
1339 vlv_merge_wm(dev
, &wm
);
1341 if (memcmp(&dev_priv
->wm
.vlv
, &wm
, sizeof(wm
)) == 0) {
1342 /* FIXME should be part of crtc atomic commit */
1343 vlv_pipe_set_fifo_size(intel_crtc
);
1347 if (wm
.level
< VLV_WM_LEVEL_DDR_DVFS
&&
1348 dev_priv
->wm
.vlv
.level
>= VLV_WM_LEVEL_DDR_DVFS
)
1349 chv_set_memory_dvfs(dev_priv
, false);
1351 if (wm
.level
< VLV_WM_LEVEL_PM5
&&
1352 dev_priv
->wm
.vlv
.level
>= VLV_WM_LEVEL_PM5
)
1353 chv_set_memory_pm5(dev_priv
, false);
1355 if (!wm
.cxsr
&& dev_priv
->wm
.vlv
.cxsr
)
1356 intel_set_memory_cxsr(dev_priv
, false);
1358 /* FIXME should be part of crtc atomic commit */
1359 vlv_pipe_set_fifo_size(intel_crtc
);
1361 vlv_write_wm_values(intel_crtc
, &wm
);
1363 DRM_DEBUG_KMS("Setting FIFO watermarks - %c: plane=%d, cursor=%d, "
1364 "sprite0=%d, sprite1=%d, SR: plane=%d, cursor=%d level=%d cxsr=%d\n",
1365 pipe_name(pipe
), wm
.pipe
[pipe
].primary
, wm
.pipe
[pipe
].cursor
,
1366 wm
.pipe
[pipe
].sprite
[0], wm
.pipe
[pipe
].sprite
[1],
1367 wm
.sr
.plane
, wm
.sr
.cursor
, wm
.level
, wm
.cxsr
);
1369 if (wm
.cxsr
&& !dev_priv
->wm
.vlv
.cxsr
)
1370 intel_set_memory_cxsr(dev_priv
, true);
1372 if (wm
.level
>= VLV_WM_LEVEL_PM5
&&
1373 dev_priv
->wm
.vlv
.level
< VLV_WM_LEVEL_PM5
)
1374 chv_set_memory_pm5(dev_priv
, true);
1376 if (wm
.level
>= VLV_WM_LEVEL_DDR_DVFS
&&
1377 dev_priv
->wm
.vlv
.level
< VLV_WM_LEVEL_DDR_DVFS
)
1378 chv_set_memory_dvfs(dev_priv
, true);
1380 dev_priv
->wm
.vlv
= wm
;
1383 #define single_plane_enabled(mask) is_power_of_2(mask)
1385 static void g4x_update_wm(struct drm_crtc
*crtc
)
1387 struct drm_device
*dev
= crtc
->dev
;
1388 static const int sr_latency_ns
= 12000;
1389 struct drm_i915_private
*dev_priv
= to_i915(dev
);
1390 int planea_wm
, planeb_wm
, cursora_wm
, cursorb_wm
;
1391 int plane_sr
, cursor_sr
;
1392 unsigned int enabled
= 0;
1395 if (g4x_compute_wm0(dev
, PIPE_A
,
1396 &g4x_wm_info
, pessimal_latency_ns
,
1397 &g4x_cursor_wm_info
, pessimal_latency_ns
,
1398 &planea_wm
, &cursora_wm
))
1399 enabled
|= 1 << PIPE_A
;
1401 if (g4x_compute_wm0(dev
, PIPE_B
,
1402 &g4x_wm_info
, pessimal_latency_ns
,
1403 &g4x_cursor_wm_info
, pessimal_latency_ns
,
1404 &planeb_wm
, &cursorb_wm
))
1405 enabled
|= 1 << PIPE_B
;
1407 if (single_plane_enabled(enabled
) &&
1408 g4x_compute_srwm(dev
, ffs(enabled
) - 1,
1411 &g4x_cursor_wm_info
,
1412 &plane_sr
, &cursor_sr
)) {
1413 cxsr_enabled
= true;
1415 cxsr_enabled
= false;
1416 intel_set_memory_cxsr(dev_priv
, false);
1417 plane_sr
= cursor_sr
= 0;
1420 DRM_DEBUG_KMS("Setting FIFO watermarks - A: plane=%d, cursor=%d, "
1421 "B: plane=%d, cursor=%d, SR: plane=%d, cursor=%d\n",
1422 planea_wm
, cursora_wm
,
1423 planeb_wm
, cursorb_wm
,
1424 plane_sr
, cursor_sr
);
1427 FW_WM(plane_sr
, SR
) |
1428 FW_WM(cursorb_wm
, CURSORB
) |
1429 FW_WM(planeb_wm
, PLANEB
) |
1430 FW_WM(planea_wm
, PLANEA
));
1432 (I915_READ(DSPFW2
) & ~DSPFW_CURSORA_MASK
) |
1433 FW_WM(cursora_wm
, CURSORA
));
1434 /* HPLL off in SR has some issues on G4x... disable it */
1436 (I915_READ(DSPFW3
) & ~(DSPFW_HPLL_SR_EN
| DSPFW_CURSOR_SR_MASK
)) |
1437 FW_WM(cursor_sr
, CURSOR_SR
));
1440 intel_set_memory_cxsr(dev_priv
, true);
1443 static void i965_update_wm(struct drm_crtc
*unused_crtc
)
1445 struct drm_device
*dev
= unused_crtc
->dev
;
1446 struct drm_i915_private
*dev_priv
= to_i915(dev
);
1447 struct drm_crtc
*crtc
;
1452 /* Calc sr entries for one plane configs */
1453 crtc
= single_enabled_crtc(dev
);
1455 /* self-refresh has much higher latency */
1456 static const int sr_latency_ns
= 12000;
1457 const struct drm_display_mode
*adjusted_mode
= &to_intel_crtc(crtc
)->config
->base
.adjusted_mode
;
1458 int clock
= adjusted_mode
->crtc_clock
;
1459 int htotal
= adjusted_mode
->crtc_htotal
;
1460 int hdisplay
= to_intel_crtc(crtc
)->config
->pipe_src_w
;
1461 int cpp
= drm_format_plane_cpp(crtc
->primary
->state
->fb
->pixel_format
, 0);
1462 unsigned long line_time_us
;
1465 line_time_us
= max(htotal
* 1000 / clock
, 1);
1467 /* Use ns/us then divide to preserve precision */
1468 entries
= (((sr_latency_ns
/ line_time_us
) + 1000) / 1000) *
1470 entries
= DIV_ROUND_UP(entries
, I915_FIFO_LINE_SIZE
);
1471 srwm
= I965_FIFO_SIZE
- entries
;
1475 DRM_DEBUG_KMS("self-refresh entries: %d, wm: %d\n",
1478 entries
= (((sr_latency_ns
/ line_time_us
) + 1000) / 1000) *
1479 cpp
* crtc
->cursor
->state
->crtc_w
;
1480 entries
= DIV_ROUND_UP(entries
,
1481 i965_cursor_wm_info
.cacheline_size
);
1482 cursor_sr
= i965_cursor_wm_info
.fifo_size
-
1483 (entries
+ i965_cursor_wm_info
.guard_size
);
1485 if (cursor_sr
> i965_cursor_wm_info
.max_wm
)
1486 cursor_sr
= i965_cursor_wm_info
.max_wm
;
1488 DRM_DEBUG_KMS("self-refresh watermark: display plane %d "
1489 "cursor %d\n", srwm
, cursor_sr
);
1491 cxsr_enabled
= true;
1493 cxsr_enabled
= false;
1494 /* Turn off self refresh if both pipes are enabled */
1495 intel_set_memory_cxsr(dev_priv
, false);
1498 DRM_DEBUG_KMS("Setting FIFO watermarks - A: 8, B: 8, C: 8, SR %d\n",
1501 /* 965 has limitations... */
1502 I915_WRITE(DSPFW1
, FW_WM(srwm
, SR
) |
1506 I915_WRITE(DSPFW2
, FW_WM(8, CURSORA
) |
1507 FW_WM(8, PLANEC_OLD
));
1508 /* update cursor SR watermark */
1509 I915_WRITE(DSPFW3
, FW_WM(cursor_sr
, CURSOR_SR
));
1512 intel_set_memory_cxsr(dev_priv
, true);
1517 static void i9xx_update_wm(struct drm_crtc
*unused_crtc
)
1519 struct drm_device
*dev
= unused_crtc
->dev
;
1520 struct drm_i915_private
*dev_priv
= to_i915(dev
);
1521 const struct intel_watermark_params
*wm_info
;
1526 int planea_wm
, planeb_wm
;
1527 struct drm_crtc
*crtc
, *enabled
= NULL
;
1530 wm_info
= &i945_wm_info
;
1531 else if (!IS_GEN2(dev
))
1532 wm_info
= &i915_wm_info
;
1534 wm_info
= &i830_a_wm_info
;
1536 fifo_size
= dev_priv
->display
.get_fifo_size(dev
, 0);
1537 crtc
= intel_get_crtc_for_plane(dev
, 0);
1538 if (intel_crtc_active(crtc
)) {
1539 const struct drm_display_mode
*adjusted_mode
;
1540 int cpp
= drm_format_plane_cpp(crtc
->primary
->state
->fb
->pixel_format
, 0);
1544 adjusted_mode
= &to_intel_crtc(crtc
)->config
->base
.adjusted_mode
;
1545 planea_wm
= intel_calculate_wm(adjusted_mode
->crtc_clock
,
1546 wm_info
, fifo_size
, cpp
,
1547 pessimal_latency_ns
);
1550 planea_wm
= fifo_size
- wm_info
->guard_size
;
1551 if (planea_wm
> (long)wm_info
->max_wm
)
1552 planea_wm
= wm_info
->max_wm
;
1556 wm_info
= &i830_bc_wm_info
;
1558 fifo_size
= dev_priv
->display
.get_fifo_size(dev
, 1);
1559 crtc
= intel_get_crtc_for_plane(dev
, 1);
1560 if (intel_crtc_active(crtc
)) {
1561 const struct drm_display_mode
*adjusted_mode
;
1562 int cpp
= drm_format_plane_cpp(crtc
->primary
->state
->fb
->pixel_format
, 0);
1566 adjusted_mode
= &to_intel_crtc(crtc
)->config
->base
.adjusted_mode
;
1567 planeb_wm
= intel_calculate_wm(adjusted_mode
->crtc_clock
,
1568 wm_info
, fifo_size
, cpp
,
1569 pessimal_latency_ns
);
1570 if (enabled
== NULL
)
1575 planeb_wm
= fifo_size
- wm_info
->guard_size
;
1576 if (planeb_wm
> (long)wm_info
->max_wm
)
1577 planeb_wm
= wm_info
->max_wm
;
1580 DRM_DEBUG_KMS("FIFO watermarks - A: %d, B: %d\n", planea_wm
, planeb_wm
);
1582 if (IS_I915GM(dev
) && enabled
) {
1583 struct drm_i915_gem_object
*obj
;
1585 obj
= intel_fb_obj(enabled
->primary
->state
->fb
);
1587 /* self-refresh seems busted with untiled */
1588 if (!i915_gem_object_is_tiled(obj
))
1593 * Overlay gets an aggressive default since video jitter is bad.
1597 /* Play safe and disable self-refresh before adjusting watermarks. */
1598 intel_set_memory_cxsr(dev_priv
, false);
1600 /* Calc sr entries for one plane configs */
1601 if (HAS_FW_BLC(dev
) && enabled
) {
1602 /* self-refresh has much higher latency */
1603 static const int sr_latency_ns
= 6000;
1604 const struct drm_display_mode
*adjusted_mode
= &to_intel_crtc(enabled
)->config
->base
.adjusted_mode
;
1605 int clock
= adjusted_mode
->crtc_clock
;
1606 int htotal
= adjusted_mode
->crtc_htotal
;
1607 int hdisplay
= to_intel_crtc(enabled
)->config
->pipe_src_w
;
1608 int cpp
= drm_format_plane_cpp(enabled
->primary
->state
->fb
->pixel_format
, 0);
1609 unsigned long line_time_us
;
1612 if (IS_I915GM(dev
) || IS_I945GM(dev
))
1615 line_time_us
= max(htotal
* 1000 / clock
, 1);
1617 /* Use ns/us then divide to preserve precision */
1618 entries
= (((sr_latency_ns
/ line_time_us
) + 1000) / 1000) *
1620 entries
= DIV_ROUND_UP(entries
, wm_info
->cacheline_size
);
1621 DRM_DEBUG_KMS("self-refresh entries: %d\n", entries
);
1622 srwm
= wm_info
->fifo_size
- entries
;
1626 if (IS_I945G(dev
) || IS_I945GM(dev
))
1627 I915_WRITE(FW_BLC_SELF
,
1628 FW_BLC_SELF_FIFO_MASK
| (srwm
& 0xff));
1630 I915_WRITE(FW_BLC_SELF
, srwm
& 0x3f);
1633 DRM_DEBUG_KMS("Setting FIFO watermarks - A: %d, B: %d, C: %d, SR %d\n",
1634 planea_wm
, planeb_wm
, cwm
, srwm
);
1636 fwater_lo
= ((planeb_wm
& 0x3f) << 16) | (planea_wm
& 0x3f);
1637 fwater_hi
= (cwm
& 0x1f);
1639 /* Set request length to 8 cachelines per fetch */
1640 fwater_lo
= fwater_lo
| (1 << 24) | (1 << 8);
1641 fwater_hi
= fwater_hi
| (1 << 8);
1643 I915_WRITE(FW_BLC
, fwater_lo
);
1644 I915_WRITE(FW_BLC2
, fwater_hi
);
1647 intel_set_memory_cxsr(dev_priv
, true);
1650 static void i845_update_wm(struct drm_crtc
*unused_crtc
)
1652 struct drm_device
*dev
= unused_crtc
->dev
;
1653 struct drm_i915_private
*dev_priv
= to_i915(dev
);
1654 struct drm_crtc
*crtc
;
1655 const struct drm_display_mode
*adjusted_mode
;
1659 crtc
= single_enabled_crtc(dev
);
1663 adjusted_mode
= &to_intel_crtc(crtc
)->config
->base
.adjusted_mode
;
1664 planea_wm
= intel_calculate_wm(adjusted_mode
->crtc_clock
,
1666 dev_priv
->display
.get_fifo_size(dev
, 0),
1667 4, pessimal_latency_ns
);
1668 fwater_lo
= I915_READ(FW_BLC
) & ~0xfff;
1669 fwater_lo
|= (3<<8) | planea_wm
;
1671 DRM_DEBUG_KMS("Setting FIFO watermarks - A: %d\n", planea_wm
);
1673 I915_WRITE(FW_BLC
, fwater_lo
);
1676 uint32_t ilk_pipe_pixel_rate(const struct intel_crtc_state
*pipe_config
)
1678 uint32_t pixel_rate
;
1680 pixel_rate
= pipe_config
->base
.adjusted_mode
.crtc_clock
;
1682 /* We only use IF-ID interlacing. If we ever use PF-ID we'll need to
1683 * adjust the pixel_rate here. */
1685 if (pipe_config
->pch_pfit
.enabled
) {
1686 uint64_t pipe_w
, pipe_h
, pfit_w
, pfit_h
;
1687 uint32_t pfit_size
= pipe_config
->pch_pfit
.size
;
1689 pipe_w
= pipe_config
->pipe_src_w
;
1690 pipe_h
= pipe_config
->pipe_src_h
;
1692 pfit_w
= (pfit_size
>> 16) & 0xFFFF;
1693 pfit_h
= pfit_size
& 0xFFFF;
1694 if (pipe_w
< pfit_w
)
1696 if (pipe_h
< pfit_h
)
1699 if (WARN_ON(!pfit_w
|| !pfit_h
))
1702 pixel_rate
= div_u64((uint64_t) pixel_rate
* pipe_w
* pipe_h
,
1709 /* latency must be in 0.1us units. */
1710 static uint32_t ilk_wm_method1(uint32_t pixel_rate
, uint8_t cpp
, uint32_t latency
)
1714 if (WARN(latency
== 0, "Latency value missing\n"))
1717 ret
= (uint64_t) pixel_rate
* cpp
* latency
;
1718 ret
= DIV_ROUND_UP_ULL(ret
, 64 * 10000) + 2;
1723 /* latency must be in 0.1us units. */
1724 static uint32_t ilk_wm_method2(uint32_t pixel_rate
, uint32_t pipe_htotal
,
1725 uint32_t horiz_pixels
, uint8_t cpp
,
1730 if (WARN(latency
== 0, "Latency value missing\n"))
1732 if (WARN_ON(!pipe_htotal
))
1735 ret
= (latency
* pixel_rate
) / (pipe_htotal
* 10000);
1736 ret
= (ret
+ 1) * horiz_pixels
* cpp
;
1737 ret
= DIV_ROUND_UP(ret
, 64) + 2;
1741 static uint32_t ilk_wm_fbc(uint32_t pri_val
, uint32_t horiz_pixels
,
1745 * Neither of these should be possible since this function shouldn't be
1746 * called if the CRTC is off or the plane is invisible. But let's be
1747 * extra paranoid to avoid a potential divide-by-zero if we screw up
1748 * elsewhere in the driver.
1752 if (WARN_ON(!horiz_pixels
))
1755 return DIV_ROUND_UP(pri_val
* 64, horiz_pixels
* cpp
) + 2;
1758 struct ilk_wm_maximums
{
1766 * For both WM_PIPE and WM_LP.
1767 * mem_value must be in 0.1us units.
1769 static uint32_t ilk_compute_pri_wm(const struct intel_crtc_state
*cstate
,
1770 const struct intel_plane_state
*pstate
,
1774 int cpp
= pstate
->base
.fb
?
1775 drm_format_plane_cpp(pstate
->base
.fb
->pixel_format
, 0) : 0;
1776 uint32_t method1
, method2
;
1778 if (!cstate
->base
.active
|| !pstate
->base
.visible
)
1781 method1
= ilk_wm_method1(ilk_pipe_pixel_rate(cstate
), cpp
, mem_value
);
1786 method2
= ilk_wm_method2(ilk_pipe_pixel_rate(cstate
),
1787 cstate
->base
.adjusted_mode
.crtc_htotal
,
1788 drm_rect_width(&pstate
->base
.dst
),
1791 return min(method1
, method2
);
1795 * For both WM_PIPE and WM_LP.
1796 * mem_value must be in 0.1us units.
1798 static uint32_t ilk_compute_spr_wm(const struct intel_crtc_state
*cstate
,
1799 const struct intel_plane_state
*pstate
,
1802 int cpp
= pstate
->base
.fb
?
1803 drm_format_plane_cpp(pstate
->base
.fb
->pixel_format
, 0) : 0;
1804 uint32_t method1
, method2
;
1806 if (!cstate
->base
.active
|| !pstate
->base
.visible
)
1809 method1
= ilk_wm_method1(ilk_pipe_pixel_rate(cstate
), cpp
, mem_value
);
1810 method2
= ilk_wm_method2(ilk_pipe_pixel_rate(cstate
),
1811 cstate
->base
.adjusted_mode
.crtc_htotal
,
1812 drm_rect_width(&pstate
->base
.dst
),
1814 return min(method1
, method2
);
1818 * For both WM_PIPE and WM_LP.
1819 * mem_value must be in 0.1us units.
1821 static uint32_t ilk_compute_cur_wm(const struct intel_crtc_state
*cstate
,
1822 const struct intel_plane_state
*pstate
,
1826 * We treat the cursor plane as always-on for the purposes of watermark
1827 * calculation. Until we have two-stage watermark programming merged,
1828 * this is necessary to avoid flickering.
1831 int width
= pstate
->base
.visible
? pstate
->base
.crtc_w
: 64;
1833 if (!cstate
->base
.active
)
1836 return ilk_wm_method2(ilk_pipe_pixel_rate(cstate
),
1837 cstate
->base
.adjusted_mode
.crtc_htotal
,
1838 width
, cpp
, mem_value
);
1841 /* Only for WM_LP. */
1842 static uint32_t ilk_compute_fbc_wm(const struct intel_crtc_state
*cstate
,
1843 const struct intel_plane_state
*pstate
,
1846 int cpp
= pstate
->base
.fb
?
1847 drm_format_plane_cpp(pstate
->base
.fb
->pixel_format
, 0) : 0;
1849 if (!cstate
->base
.active
|| !pstate
->base
.visible
)
1852 return ilk_wm_fbc(pri_val
, drm_rect_width(&pstate
->base
.dst
), cpp
);
1855 static unsigned int ilk_display_fifo_size(const struct drm_device
*dev
)
1857 if (INTEL_INFO(dev
)->gen
>= 8)
1859 else if (INTEL_INFO(dev
)->gen
>= 7)
1865 static unsigned int ilk_plane_wm_reg_max(const struct drm_device
*dev
,
1866 int level
, bool is_sprite
)
1868 if (INTEL_INFO(dev
)->gen
>= 8)
1869 /* BDW primary/sprite plane watermarks */
1870 return level
== 0 ? 255 : 2047;
1871 else if (INTEL_INFO(dev
)->gen
>= 7)
1872 /* IVB/HSW primary/sprite plane watermarks */
1873 return level
== 0 ? 127 : 1023;
1874 else if (!is_sprite
)
1875 /* ILK/SNB primary plane watermarks */
1876 return level
== 0 ? 127 : 511;
1878 /* ILK/SNB sprite plane watermarks */
1879 return level
== 0 ? 63 : 255;
1882 static unsigned int ilk_cursor_wm_reg_max(const struct drm_device
*dev
,
1885 if (INTEL_INFO(dev
)->gen
>= 7)
1886 return level
== 0 ? 63 : 255;
1888 return level
== 0 ? 31 : 63;
1891 static unsigned int ilk_fbc_wm_reg_max(const struct drm_device
*dev
)
1893 if (INTEL_INFO(dev
)->gen
>= 8)
1899 /* Calculate the maximum primary/sprite plane watermark */
1900 static unsigned int ilk_plane_wm_max(const struct drm_device
*dev
,
1902 const struct intel_wm_config
*config
,
1903 enum intel_ddb_partitioning ddb_partitioning
,
1906 unsigned int fifo_size
= ilk_display_fifo_size(dev
);
1908 /* if sprites aren't enabled, sprites get nothing */
1909 if (is_sprite
&& !config
->sprites_enabled
)
1912 /* HSW allows LP1+ watermarks even with multiple pipes */
1913 if (level
== 0 || config
->num_pipes_active
> 1) {
1914 fifo_size
/= INTEL_INFO(dev
)->num_pipes
;
1917 * For some reason the non self refresh
1918 * FIFO size is only half of the self
1919 * refresh FIFO size on ILK/SNB.
1921 if (INTEL_INFO(dev
)->gen
<= 6)
1925 if (config
->sprites_enabled
) {
1926 /* level 0 is always calculated with 1:1 split */
1927 if (level
> 0 && ddb_partitioning
== INTEL_DDB_PART_5_6
) {
1936 /* clamp to max that the registers can hold */
1937 return min(fifo_size
, ilk_plane_wm_reg_max(dev
, level
, is_sprite
));
1940 /* Calculate the maximum cursor plane watermark */
1941 static unsigned int ilk_cursor_wm_max(const struct drm_device
*dev
,
1943 const struct intel_wm_config
*config
)
1945 /* HSW LP1+ watermarks w/ multiple pipes */
1946 if (level
> 0 && config
->num_pipes_active
> 1)
1949 /* otherwise just report max that registers can hold */
1950 return ilk_cursor_wm_reg_max(dev
, level
);
1953 static void ilk_compute_wm_maximums(const struct drm_device
*dev
,
1955 const struct intel_wm_config
*config
,
1956 enum intel_ddb_partitioning ddb_partitioning
,
1957 struct ilk_wm_maximums
*max
)
1959 max
->pri
= ilk_plane_wm_max(dev
, level
, config
, ddb_partitioning
, false);
1960 max
->spr
= ilk_plane_wm_max(dev
, level
, config
, ddb_partitioning
, true);
1961 max
->cur
= ilk_cursor_wm_max(dev
, level
, config
);
1962 max
->fbc
= ilk_fbc_wm_reg_max(dev
);
1965 static void ilk_compute_wm_reg_maximums(struct drm_device
*dev
,
1967 struct ilk_wm_maximums
*max
)
1969 max
->pri
= ilk_plane_wm_reg_max(dev
, level
, false);
1970 max
->spr
= ilk_plane_wm_reg_max(dev
, level
, true);
1971 max
->cur
= ilk_cursor_wm_reg_max(dev
, level
);
1972 max
->fbc
= ilk_fbc_wm_reg_max(dev
);
1975 static bool ilk_validate_wm_level(int level
,
1976 const struct ilk_wm_maximums
*max
,
1977 struct intel_wm_level
*result
)
1981 /* already determined to be invalid? */
1982 if (!result
->enable
)
1985 result
->enable
= result
->pri_val
<= max
->pri
&&
1986 result
->spr_val
<= max
->spr
&&
1987 result
->cur_val
<= max
->cur
;
1989 ret
= result
->enable
;
1992 * HACK until we can pre-compute everything,
1993 * and thus fail gracefully if LP0 watermarks
1996 if (level
== 0 && !result
->enable
) {
1997 if (result
->pri_val
> max
->pri
)
1998 DRM_DEBUG_KMS("Primary WM%d too large %u (max %u)\n",
1999 level
, result
->pri_val
, max
->pri
);
2000 if (result
->spr_val
> max
->spr
)
2001 DRM_DEBUG_KMS("Sprite WM%d too large %u (max %u)\n",
2002 level
, result
->spr_val
, max
->spr
);
2003 if (result
->cur_val
> max
->cur
)
2004 DRM_DEBUG_KMS("Cursor WM%d too large %u (max %u)\n",
2005 level
, result
->cur_val
, max
->cur
);
2007 result
->pri_val
= min_t(uint32_t, result
->pri_val
, max
->pri
);
2008 result
->spr_val
= min_t(uint32_t, result
->spr_val
, max
->spr
);
2009 result
->cur_val
= min_t(uint32_t, result
->cur_val
, max
->cur
);
2010 result
->enable
= true;
2016 static void ilk_compute_wm_level(const struct drm_i915_private
*dev_priv
,
2017 const struct intel_crtc
*intel_crtc
,
2019 struct intel_crtc_state
*cstate
,
2020 struct intel_plane_state
*pristate
,
2021 struct intel_plane_state
*sprstate
,
2022 struct intel_plane_state
*curstate
,
2023 struct intel_wm_level
*result
)
2025 uint16_t pri_latency
= dev_priv
->wm
.pri_latency
[level
];
2026 uint16_t spr_latency
= dev_priv
->wm
.spr_latency
[level
];
2027 uint16_t cur_latency
= dev_priv
->wm
.cur_latency
[level
];
2029 /* WM1+ latency values stored in 0.5us units */
2037 result
->pri_val
= ilk_compute_pri_wm(cstate
, pristate
,
2038 pri_latency
, level
);
2039 result
->fbc_val
= ilk_compute_fbc_wm(cstate
, pristate
, result
->pri_val
);
2043 result
->spr_val
= ilk_compute_spr_wm(cstate
, sprstate
, spr_latency
);
2046 result
->cur_val
= ilk_compute_cur_wm(cstate
, curstate
, cur_latency
);
2048 result
->enable
= true;
2052 hsw_compute_linetime_wm(const struct intel_crtc_state
*cstate
)
2054 const struct intel_atomic_state
*intel_state
=
2055 to_intel_atomic_state(cstate
->base
.state
);
2056 const struct drm_display_mode
*adjusted_mode
=
2057 &cstate
->base
.adjusted_mode
;
2058 u32 linetime
, ips_linetime
;
2060 if (!cstate
->base
.active
)
2062 if (WARN_ON(adjusted_mode
->crtc_clock
== 0))
2064 if (WARN_ON(intel_state
->cdclk
== 0))
2067 /* The WM are computed with base on how long it takes to fill a single
2068 * row at the given clock rate, multiplied by 8.
2070 linetime
= DIV_ROUND_CLOSEST(adjusted_mode
->crtc_htotal
* 1000 * 8,
2071 adjusted_mode
->crtc_clock
);
2072 ips_linetime
= DIV_ROUND_CLOSEST(adjusted_mode
->crtc_htotal
* 1000 * 8,
2073 intel_state
->cdclk
);
2075 return PIPE_WM_LINETIME_IPS_LINETIME(ips_linetime
) |
2076 PIPE_WM_LINETIME_TIME(linetime
);
2079 static void intel_read_wm_latency(struct drm_device
*dev
, uint16_t wm
[8])
2081 struct drm_i915_private
*dev_priv
= to_i915(dev
);
2086 int level
, max_level
= ilk_wm_max_level(dev
);
2088 /* read the first set of memory latencies[0:3] */
2089 val
= 0; /* data0 to be programmed to 0 for first set */
2090 mutex_lock(&dev_priv
->rps
.hw_lock
);
2091 ret
= sandybridge_pcode_read(dev_priv
,
2092 GEN9_PCODE_READ_MEM_LATENCY
,
2094 mutex_unlock(&dev_priv
->rps
.hw_lock
);
2097 DRM_ERROR("SKL Mailbox read error = %d\n", ret
);
2101 wm
[0] = val
& GEN9_MEM_LATENCY_LEVEL_MASK
;
2102 wm
[1] = (val
>> GEN9_MEM_LATENCY_LEVEL_1_5_SHIFT
) &
2103 GEN9_MEM_LATENCY_LEVEL_MASK
;
2104 wm
[2] = (val
>> GEN9_MEM_LATENCY_LEVEL_2_6_SHIFT
) &
2105 GEN9_MEM_LATENCY_LEVEL_MASK
;
2106 wm
[3] = (val
>> GEN9_MEM_LATENCY_LEVEL_3_7_SHIFT
) &
2107 GEN9_MEM_LATENCY_LEVEL_MASK
;
2109 /* read the second set of memory latencies[4:7] */
2110 val
= 1; /* data0 to be programmed to 1 for second set */
2111 mutex_lock(&dev_priv
->rps
.hw_lock
);
2112 ret
= sandybridge_pcode_read(dev_priv
,
2113 GEN9_PCODE_READ_MEM_LATENCY
,
2115 mutex_unlock(&dev_priv
->rps
.hw_lock
);
2117 DRM_ERROR("SKL Mailbox read error = %d\n", ret
);
2121 wm
[4] = val
& GEN9_MEM_LATENCY_LEVEL_MASK
;
2122 wm
[5] = (val
>> GEN9_MEM_LATENCY_LEVEL_1_5_SHIFT
) &
2123 GEN9_MEM_LATENCY_LEVEL_MASK
;
2124 wm
[6] = (val
>> GEN9_MEM_LATENCY_LEVEL_2_6_SHIFT
) &
2125 GEN9_MEM_LATENCY_LEVEL_MASK
;
2126 wm
[7] = (val
>> GEN9_MEM_LATENCY_LEVEL_3_7_SHIFT
) &
2127 GEN9_MEM_LATENCY_LEVEL_MASK
;
2130 * WaWmMemoryReadLatency:skl
2132 * punit doesn't take into account the read latency so we need
2133 * to add 2us to the various latency levels we retrieve from
2135 * - W0 is a bit special in that it's the only level that
2136 * can't be disabled if we want to have display working, so
2137 * we always add 2us there.
2138 * - For levels >=1, punit returns 0us latency when they are
2139 * disabled, so we respect that and don't add 2us then
2141 * Additionally, if a level n (n > 1) has a 0us latency, all
2142 * levels m (m >= n) need to be disabled. We make sure to
2143 * sanitize the values out of the punit to satisfy this
2147 for (level
= 1; level
<= max_level
; level
++)
2151 for (i
= level
+ 1; i
<= max_level
; i
++)
2156 } else if (IS_HASWELL(dev
) || IS_BROADWELL(dev
)) {
2157 uint64_t sskpd
= I915_READ64(MCH_SSKPD
);
2159 wm
[0] = (sskpd
>> 56) & 0xFF;
2161 wm
[0] = sskpd
& 0xF;
2162 wm
[1] = (sskpd
>> 4) & 0xFF;
2163 wm
[2] = (sskpd
>> 12) & 0xFF;
2164 wm
[3] = (sskpd
>> 20) & 0x1FF;
2165 wm
[4] = (sskpd
>> 32) & 0x1FF;
2166 } else if (INTEL_INFO(dev
)->gen
>= 6) {
2167 uint32_t sskpd
= I915_READ(MCH_SSKPD
);
2169 wm
[0] = (sskpd
>> SSKPD_WM0_SHIFT
) & SSKPD_WM_MASK
;
2170 wm
[1] = (sskpd
>> SSKPD_WM1_SHIFT
) & SSKPD_WM_MASK
;
2171 wm
[2] = (sskpd
>> SSKPD_WM2_SHIFT
) & SSKPD_WM_MASK
;
2172 wm
[3] = (sskpd
>> SSKPD_WM3_SHIFT
) & SSKPD_WM_MASK
;
2173 } else if (INTEL_INFO(dev
)->gen
>= 5) {
2174 uint32_t mltr
= I915_READ(MLTR_ILK
);
2176 /* ILK primary LP0 latency is 700 ns */
2178 wm
[1] = (mltr
>> MLTR_WM1_SHIFT
) & ILK_SRLT_MASK
;
2179 wm
[2] = (mltr
>> MLTR_WM2_SHIFT
) & ILK_SRLT_MASK
;
2183 static void intel_fixup_spr_wm_latency(struct drm_device
*dev
, uint16_t wm
[5])
2185 /* ILK sprite LP0 latency is 1300 ns */
2190 static void intel_fixup_cur_wm_latency(struct drm_device
*dev
, uint16_t wm
[5])
2192 /* ILK cursor LP0 latency is 1300 ns */
2196 /* WaDoubleCursorLP3Latency:ivb */
2197 if (IS_IVYBRIDGE(dev
))
2201 int ilk_wm_max_level(const struct drm_device
*dev
)
2203 /* how many WM levels are we expecting */
2204 if (INTEL_INFO(dev
)->gen
>= 9)
2206 else if (IS_HASWELL(dev
) || IS_BROADWELL(dev
))
2208 else if (INTEL_INFO(dev
)->gen
>= 6)
2214 static void intel_print_wm_latency(struct drm_device
*dev
,
2216 const uint16_t wm
[8])
2218 int level
, max_level
= ilk_wm_max_level(dev
);
2220 for (level
= 0; level
<= max_level
; level
++) {
2221 unsigned int latency
= wm
[level
];
2224 DRM_ERROR("%s WM%d latency not provided\n",
2230 * - latencies are in us on gen9.
2231 * - before then, WM1+ latency values are in 0.5us units
2238 DRM_DEBUG_KMS("%s WM%d latency %u (%u.%u usec)\n",
2239 name
, level
, wm
[level
],
2240 latency
/ 10, latency
% 10);
2244 static bool ilk_increase_wm_latency(struct drm_i915_private
*dev_priv
,
2245 uint16_t wm
[5], uint16_t min
)
2247 int level
, max_level
= ilk_wm_max_level(&dev_priv
->drm
);
2252 wm
[0] = max(wm
[0], min
);
2253 for (level
= 1; level
<= max_level
; level
++)
2254 wm
[level
] = max_t(uint16_t, wm
[level
], DIV_ROUND_UP(min
, 5));
2259 static void snb_wm_latency_quirk(struct drm_device
*dev
)
2261 struct drm_i915_private
*dev_priv
= to_i915(dev
);
2265 * The BIOS provided WM memory latency values are often
2266 * inadequate for high resolution displays. Adjust them.
2268 changed
= ilk_increase_wm_latency(dev_priv
, dev_priv
->wm
.pri_latency
, 12) |
2269 ilk_increase_wm_latency(dev_priv
, dev_priv
->wm
.spr_latency
, 12) |
2270 ilk_increase_wm_latency(dev_priv
, dev_priv
->wm
.cur_latency
, 12);
2275 DRM_DEBUG_KMS("WM latency values increased to avoid potential underruns\n");
2276 intel_print_wm_latency(dev
, "Primary", dev_priv
->wm
.pri_latency
);
2277 intel_print_wm_latency(dev
, "Sprite", dev_priv
->wm
.spr_latency
);
2278 intel_print_wm_latency(dev
, "Cursor", dev_priv
->wm
.cur_latency
);
2281 static void ilk_setup_wm_latency(struct drm_device
*dev
)
2283 struct drm_i915_private
*dev_priv
= to_i915(dev
);
2285 intel_read_wm_latency(dev
, dev_priv
->wm
.pri_latency
);
2287 memcpy(dev_priv
->wm
.spr_latency
, dev_priv
->wm
.pri_latency
,
2288 sizeof(dev_priv
->wm
.pri_latency
));
2289 memcpy(dev_priv
->wm
.cur_latency
, dev_priv
->wm
.pri_latency
,
2290 sizeof(dev_priv
->wm
.pri_latency
));
2292 intel_fixup_spr_wm_latency(dev
, dev_priv
->wm
.spr_latency
);
2293 intel_fixup_cur_wm_latency(dev
, dev_priv
->wm
.cur_latency
);
2295 intel_print_wm_latency(dev
, "Primary", dev_priv
->wm
.pri_latency
);
2296 intel_print_wm_latency(dev
, "Sprite", dev_priv
->wm
.spr_latency
);
2297 intel_print_wm_latency(dev
, "Cursor", dev_priv
->wm
.cur_latency
);
2300 snb_wm_latency_quirk(dev
);
2303 static void skl_setup_wm_latency(struct drm_device
*dev
)
2305 struct drm_i915_private
*dev_priv
= to_i915(dev
);
2307 intel_read_wm_latency(dev
, dev_priv
->wm
.skl_latency
);
2308 intel_print_wm_latency(dev
, "Gen9 Plane", dev_priv
->wm
.skl_latency
);
2311 static bool ilk_validate_pipe_wm(struct drm_device
*dev
,
2312 struct intel_pipe_wm
*pipe_wm
)
2314 /* LP0 watermark maximums depend on this pipe alone */
2315 const struct intel_wm_config config
= {
2316 .num_pipes_active
= 1,
2317 .sprites_enabled
= pipe_wm
->sprites_enabled
,
2318 .sprites_scaled
= pipe_wm
->sprites_scaled
,
2320 struct ilk_wm_maximums max
;
2322 /* LP0 watermarks always use 1/2 DDB partitioning */
2323 ilk_compute_wm_maximums(dev
, 0, &config
, INTEL_DDB_PART_1_2
, &max
);
2325 /* At least LP0 must be valid */
2326 if (!ilk_validate_wm_level(0, &max
, &pipe_wm
->wm
[0])) {
2327 DRM_DEBUG_KMS("LP0 watermark invalid\n");
2334 /* Compute new watermarks for the pipe */
2335 static int ilk_compute_pipe_wm(struct intel_crtc_state
*cstate
)
2337 struct drm_atomic_state
*state
= cstate
->base
.state
;
2338 struct intel_crtc
*intel_crtc
= to_intel_crtc(cstate
->base
.crtc
);
2339 struct intel_pipe_wm
*pipe_wm
;
2340 struct drm_device
*dev
= state
->dev
;
2341 const struct drm_i915_private
*dev_priv
= to_i915(dev
);
2342 struct intel_plane
*intel_plane
;
2343 struct intel_plane_state
*pristate
= NULL
;
2344 struct intel_plane_state
*sprstate
= NULL
;
2345 struct intel_plane_state
*curstate
= NULL
;
2346 int level
, max_level
= ilk_wm_max_level(dev
), usable_level
;
2347 struct ilk_wm_maximums max
;
2349 pipe_wm
= &cstate
->wm
.ilk
.optimal
;
2351 for_each_intel_plane_on_crtc(dev
, intel_crtc
, intel_plane
) {
2352 struct intel_plane_state
*ps
;
2354 ps
= intel_atomic_get_existing_plane_state(state
,
2359 if (intel_plane
->base
.type
== DRM_PLANE_TYPE_PRIMARY
)
2361 else if (intel_plane
->base
.type
== DRM_PLANE_TYPE_OVERLAY
)
2363 else if (intel_plane
->base
.type
== DRM_PLANE_TYPE_CURSOR
)
2367 pipe_wm
->pipe_enabled
= cstate
->base
.active
;
2369 pipe_wm
->sprites_enabled
= sprstate
->base
.visible
;
2370 pipe_wm
->sprites_scaled
= sprstate
->base
.visible
&&
2371 (drm_rect_width(&sprstate
->base
.dst
) != drm_rect_width(&sprstate
->base
.src
) >> 16 ||
2372 drm_rect_height(&sprstate
->base
.dst
) != drm_rect_height(&sprstate
->base
.src
) >> 16);
2375 usable_level
= max_level
;
2377 /* ILK/SNB: LP2+ watermarks only w/o sprites */
2378 if (INTEL_INFO(dev
)->gen
<= 6 && pipe_wm
->sprites_enabled
)
2381 /* ILK/SNB/IVB: LP1+ watermarks only w/o scaling */
2382 if (pipe_wm
->sprites_scaled
)
2385 ilk_compute_wm_level(dev_priv
, intel_crtc
, 0, cstate
,
2386 pristate
, sprstate
, curstate
, &pipe_wm
->raw_wm
[0]);
2388 memset(&pipe_wm
->wm
, 0, sizeof(pipe_wm
->wm
));
2389 pipe_wm
->wm
[0] = pipe_wm
->raw_wm
[0];
2391 if (IS_HASWELL(dev
) || IS_BROADWELL(dev
))
2392 pipe_wm
->linetime
= hsw_compute_linetime_wm(cstate
);
2394 if (!ilk_validate_pipe_wm(dev
, pipe_wm
))
2397 ilk_compute_wm_reg_maximums(dev
, 1, &max
);
2399 for (level
= 1; level
<= max_level
; level
++) {
2400 struct intel_wm_level
*wm
= &pipe_wm
->raw_wm
[level
];
2402 ilk_compute_wm_level(dev_priv
, intel_crtc
, level
, cstate
,
2403 pristate
, sprstate
, curstate
, wm
);
2406 * Disable any watermark level that exceeds the
2407 * register maximums since such watermarks are
2410 if (level
> usable_level
)
2413 if (ilk_validate_wm_level(level
, &max
, wm
))
2414 pipe_wm
->wm
[level
] = *wm
;
2416 usable_level
= level
;
2423 * Build a set of 'intermediate' watermark values that satisfy both the old
2424 * state and the new state. These can be programmed to the hardware
2427 static int ilk_compute_intermediate_wm(struct drm_device
*dev
,
2428 struct intel_crtc
*intel_crtc
,
2429 struct intel_crtc_state
*newstate
)
2431 struct intel_pipe_wm
*a
= &newstate
->wm
.ilk
.intermediate
;
2432 struct intel_pipe_wm
*b
= &intel_crtc
->wm
.active
.ilk
;
2433 int level
, max_level
= ilk_wm_max_level(dev
);
2436 * Start with the final, target watermarks, then combine with the
2437 * currently active watermarks to get values that are safe both before
2438 * and after the vblank.
2440 *a
= newstate
->wm
.ilk
.optimal
;
2441 a
->pipe_enabled
|= b
->pipe_enabled
;
2442 a
->sprites_enabled
|= b
->sprites_enabled
;
2443 a
->sprites_scaled
|= b
->sprites_scaled
;
2445 for (level
= 0; level
<= max_level
; level
++) {
2446 struct intel_wm_level
*a_wm
= &a
->wm
[level
];
2447 const struct intel_wm_level
*b_wm
= &b
->wm
[level
];
2449 a_wm
->enable
&= b_wm
->enable
;
2450 a_wm
->pri_val
= max(a_wm
->pri_val
, b_wm
->pri_val
);
2451 a_wm
->spr_val
= max(a_wm
->spr_val
, b_wm
->spr_val
);
2452 a_wm
->cur_val
= max(a_wm
->cur_val
, b_wm
->cur_val
);
2453 a_wm
->fbc_val
= max(a_wm
->fbc_val
, b_wm
->fbc_val
);
2457 * We need to make sure that these merged watermark values are
2458 * actually a valid configuration themselves. If they're not,
2459 * there's no safe way to transition from the old state to
2460 * the new state, so we need to fail the atomic transaction.
2462 if (!ilk_validate_pipe_wm(dev
, a
))
2466 * If our intermediate WM are identical to the final WM, then we can
2467 * omit the post-vblank programming; only update if it's different.
2469 if (memcmp(a
, &newstate
->wm
.ilk
.optimal
, sizeof(*a
)) == 0)
2470 newstate
->wm
.need_postvbl_update
= false;
2476 * Merge the watermarks from all active pipes for a specific level.
2478 static void ilk_merge_wm_level(struct drm_device
*dev
,
2480 struct intel_wm_level
*ret_wm
)
2482 const struct intel_crtc
*intel_crtc
;
2484 ret_wm
->enable
= true;
2486 for_each_intel_crtc(dev
, intel_crtc
) {
2487 const struct intel_pipe_wm
*active
= &intel_crtc
->wm
.active
.ilk
;
2488 const struct intel_wm_level
*wm
= &active
->wm
[level
];
2490 if (!active
->pipe_enabled
)
2494 * The watermark values may have been used in the past,
2495 * so we must maintain them in the registers for some
2496 * time even if the level is now disabled.
2499 ret_wm
->enable
= false;
2501 ret_wm
->pri_val
= max(ret_wm
->pri_val
, wm
->pri_val
);
2502 ret_wm
->spr_val
= max(ret_wm
->spr_val
, wm
->spr_val
);
2503 ret_wm
->cur_val
= max(ret_wm
->cur_val
, wm
->cur_val
);
2504 ret_wm
->fbc_val
= max(ret_wm
->fbc_val
, wm
->fbc_val
);
2509 * Merge all low power watermarks for all active pipes.
2511 static void ilk_wm_merge(struct drm_device
*dev
,
2512 const struct intel_wm_config
*config
,
2513 const struct ilk_wm_maximums
*max
,
2514 struct intel_pipe_wm
*merged
)
2516 struct drm_i915_private
*dev_priv
= to_i915(dev
);
2517 int level
, max_level
= ilk_wm_max_level(dev
);
2518 int last_enabled_level
= max_level
;
2520 /* ILK/SNB/IVB: LP1+ watermarks only w/ single pipe */
2521 if ((INTEL_INFO(dev
)->gen
<= 6 || IS_IVYBRIDGE(dev
)) &&
2522 config
->num_pipes_active
> 1)
2523 last_enabled_level
= 0;
2525 /* ILK: FBC WM must be disabled always */
2526 merged
->fbc_wm_enabled
= INTEL_INFO(dev
)->gen
>= 6;
2528 /* merge each WM1+ level */
2529 for (level
= 1; level
<= max_level
; level
++) {
2530 struct intel_wm_level
*wm
= &merged
->wm
[level
];
2532 ilk_merge_wm_level(dev
, level
, wm
);
2534 if (level
> last_enabled_level
)
2536 else if (!ilk_validate_wm_level(level
, max
, wm
))
2537 /* make sure all following levels get disabled */
2538 last_enabled_level
= level
- 1;
2541 * The spec says it is preferred to disable
2542 * FBC WMs instead of disabling a WM level.
2544 if (wm
->fbc_val
> max
->fbc
) {
2546 merged
->fbc_wm_enabled
= false;
2551 /* ILK: LP2+ must be disabled when FBC WM is disabled but FBC enabled */
2553 * FIXME this is racy. FBC might get enabled later.
2554 * What we should check here is whether FBC can be
2555 * enabled sometime later.
2557 if (IS_GEN5(dev
) && !merged
->fbc_wm_enabled
&&
2558 intel_fbc_is_active(dev_priv
)) {
2559 for (level
= 2; level
<= max_level
; level
++) {
2560 struct intel_wm_level
*wm
= &merged
->wm
[level
];
2567 static int ilk_wm_lp_to_level(int wm_lp
, const struct intel_pipe_wm
*pipe_wm
)
2569 /* LP1,LP2,LP3 levels are either 1,2,3 or 1,3,4 */
2570 return wm_lp
+ (wm_lp
>= 2 && pipe_wm
->wm
[4].enable
);
2573 /* The value we need to program into the WM_LPx latency field */
2574 static unsigned int ilk_wm_lp_latency(struct drm_device
*dev
, int level
)
2576 struct drm_i915_private
*dev_priv
= to_i915(dev
);
2578 if (IS_HASWELL(dev
) || IS_BROADWELL(dev
))
2581 return dev_priv
->wm
.pri_latency
[level
];
2584 static void ilk_compute_wm_results(struct drm_device
*dev
,
2585 const struct intel_pipe_wm
*merged
,
2586 enum intel_ddb_partitioning partitioning
,
2587 struct ilk_wm_values
*results
)
2589 struct intel_crtc
*intel_crtc
;
2592 results
->enable_fbc_wm
= merged
->fbc_wm_enabled
;
2593 results
->partitioning
= partitioning
;
2595 /* LP1+ register values */
2596 for (wm_lp
= 1; wm_lp
<= 3; wm_lp
++) {
2597 const struct intel_wm_level
*r
;
2599 level
= ilk_wm_lp_to_level(wm_lp
, merged
);
2601 r
= &merged
->wm
[level
];
2604 * Maintain the watermark values even if the level is
2605 * disabled. Doing otherwise could cause underruns.
2607 results
->wm_lp
[wm_lp
- 1] =
2608 (ilk_wm_lp_latency(dev
, level
) << WM1_LP_LATENCY_SHIFT
) |
2609 (r
->pri_val
<< WM1_LP_SR_SHIFT
) |
2613 results
->wm_lp
[wm_lp
- 1] |= WM1_LP_SR_EN
;
2615 if (INTEL_INFO(dev
)->gen
>= 8)
2616 results
->wm_lp
[wm_lp
- 1] |=
2617 r
->fbc_val
<< WM1_LP_FBC_SHIFT_BDW
;
2619 results
->wm_lp
[wm_lp
- 1] |=
2620 r
->fbc_val
<< WM1_LP_FBC_SHIFT
;
2623 * Always set WM1S_LP_EN when spr_val != 0, even if the
2624 * level is disabled. Doing otherwise could cause underruns.
2626 if (INTEL_INFO(dev
)->gen
<= 6 && r
->spr_val
) {
2627 WARN_ON(wm_lp
!= 1);
2628 results
->wm_lp_spr
[wm_lp
- 1] = WM1S_LP_EN
| r
->spr_val
;
2630 results
->wm_lp_spr
[wm_lp
- 1] = r
->spr_val
;
2633 /* LP0 register values */
2634 for_each_intel_crtc(dev
, intel_crtc
) {
2635 enum pipe pipe
= intel_crtc
->pipe
;
2636 const struct intel_wm_level
*r
=
2637 &intel_crtc
->wm
.active
.ilk
.wm
[0];
2639 if (WARN_ON(!r
->enable
))
2642 results
->wm_linetime
[pipe
] = intel_crtc
->wm
.active
.ilk
.linetime
;
2644 results
->wm_pipe
[pipe
] =
2645 (r
->pri_val
<< WM0_PIPE_PLANE_SHIFT
) |
2646 (r
->spr_val
<< WM0_PIPE_SPRITE_SHIFT
) |
2651 /* Find the result with the highest level enabled. Check for enable_fbc_wm in
2652 * case both are at the same level. Prefer r1 in case they're the same. */
2653 static struct intel_pipe_wm
*ilk_find_best_result(struct drm_device
*dev
,
2654 struct intel_pipe_wm
*r1
,
2655 struct intel_pipe_wm
*r2
)
2657 int level
, max_level
= ilk_wm_max_level(dev
);
2658 int level1
= 0, level2
= 0;
2660 for (level
= 1; level
<= max_level
; level
++) {
2661 if (r1
->wm
[level
].enable
)
2663 if (r2
->wm
[level
].enable
)
2667 if (level1
== level2
) {
2668 if (r2
->fbc_wm_enabled
&& !r1
->fbc_wm_enabled
)
2672 } else if (level1
> level2
) {
2679 /* dirty bits used to track which watermarks need changes */
2680 #define WM_DIRTY_PIPE(pipe) (1 << (pipe))
2681 #define WM_DIRTY_LINETIME(pipe) (1 << (8 + (pipe)))
2682 #define WM_DIRTY_LP(wm_lp) (1 << (15 + (wm_lp)))
2683 #define WM_DIRTY_LP_ALL (WM_DIRTY_LP(1) | WM_DIRTY_LP(2) | WM_DIRTY_LP(3))
2684 #define WM_DIRTY_FBC (1 << 24)
2685 #define WM_DIRTY_DDB (1 << 25)
2687 static unsigned int ilk_compute_wm_dirty(struct drm_i915_private
*dev_priv
,
2688 const struct ilk_wm_values
*old
,
2689 const struct ilk_wm_values
*new)
2691 unsigned int dirty
= 0;
2695 for_each_pipe(dev_priv
, pipe
) {
2696 if (old
->wm_linetime
[pipe
] != new->wm_linetime
[pipe
]) {
2697 dirty
|= WM_DIRTY_LINETIME(pipe
);
2698 /* Must disable LP1+ watermarks too */
2699 dirty
|= WM_DIRTY_LP_ALL
;
2702 if (old
->wm_pipe
[pipe
] != new->wm_pipe
[pipe
]) {
2703 dirty
|= WM_DIRTY_PIPE(pipe
);
2704 /* Must disable LP1+ watermarks too */
2705 dirty
|= WM_DIRTY_LP_ALL
;
2709 if (old
->enable_fbc_wm
!= new->enable_fbc_wm
) {
2710 dirty
|= WM_DIRTY_FBC
;
2711 /* Must disable LP1+ watermarks too */
2712 dirty
|= WM_DIRTY_LP_ALL
;
2715 if (old
->partitioning
!= new->partitioning
) {
2716 dirty
|= WM_DIRTY_DDB
;
2717 /* Must disable LP1+ watermarks too */
2718 dirty
|= WM_DIRTY_LP_ALL
;
2721 /* LP1+ watermarks already deemed dirty, no need to continue */
2722 if (dirty
& WM_DIRTY_LP_ALL
)
2725 /* Find the lowest numbered LP1+ watermark in need of an update... */
2726 for (wm_lp
= 1; wm_lp
<= 3; wm_lp
++) {
2727 if (old
->wm_lp
[wm_lp
- 1] != new->wm_lp
[wm_lp
- 1] ||
2728 old
->wm_lp_spr
[wm_lp
- 1] != new->wm_lp_spr
[wm_lp
- 1])
2732 /* ...and mark it and all higher numbered LP1+ watermarks as dirty */
2733 for (; wm_lp
<= 3; wm_lp
++)
2734 dirty
|= WM_DIRTY_LP(wm_lp
);
2739 static bool _ilk_disable_lp_wm(struct drm_i915_private
*dev_priv
,
2742 struct ilk_wm_values
*previous
= &dev_priv
->wm
.hw
;
2743 bool changed
= false;
2745 if (dirty
& WM_DIRTY_LP(3) && previous
->wm_lp
[2] & WM1_LP_SR_EN
) {
2746 previous
->wm_lp
[2] &= ~WM1_LP_SR_EN
;
2747 I915_WRITE(WM3_LP_ILK
, previous
->wm_lp
[2]);
2750 if (dirty
& WM_DIRTY_LP(2) && previous
->wm_lp
[1] & WM1_LP_SR_EN
) {
2751 previous
->wm_lp
[1] &= ~WM1_LP_SR_EN
;
2752 I915_WRITE(WM2_LP_ILK
, previous
->wm_lp
[1]);
2755 if (dirty
& WM_DIRTY_LP(1) && previous
->wm_lp
[0] & WM1_LP_SR_EN
) {
2756 previous
->wm_lp
[0] &= ~WM1_LP_SR_EN
;
2757 I915_WRITE(WM1_LP_ILK
, previous
->wm_lp
[0]);
2762 * Don't touch WM1S_LP_EN here.
2763 * Doing so could cause underruns.
2770 * The spec says we shouldn't write when we don't need, because every write
2771 * causes WMs to be re-evaluated, expending some power.
2773 static void ilk_write_wm_values(struct drm_i915_private
*dev_priv
,
2774 struct ilk_wm_values
*results
)
2776 struct drm_device
*dev
= &dev_priv
->drm
;
2777 struct ilk_wm_values
*previous
= &dev_priv
->wm
.hw
;
2781 dirty
= ilk_compute_wm_dirty(dev_priv
, previous
, results
);
2785 _ilk_disable_lp_wm(dev_priv
, dirty
);
2787 if (dirty
& WM_DIRTY_PIPE(PIPE_A
))
2788 I915_WRITE(WM0_PIPEA_ILK
, results
->wm_pipe
[0]);
2789 if (dirty
& WM_DIRTY_PIPE(PIPE_B
))
2790 I915_WRITE(WM0_PIPEB_ILK
, results
->wm_pipe
[1]);
2791 if (dirty
& WM_DIRTY_PIPE(PIPE_C
))
2792 I915_WRITE(WM0_PIPEC_IVB
, results
->wm_pipe
[2]);
2794 if (dirty
& WM_DIRTY_LINETIME(PIPE_A
))
2795 I915_WRITE(PIPE_WM_LINETIME(PIPE_A
), results
->wm_linetime
[0]);
2796 if (dirty
& WM_DIRTY_LINETIME(PIPE_B
))
2797 I915_WRITE(PIPE_WM_LINETIME(PIPE_B
), results
->wm_linetime
[1]);
2798 if (dirty
& WM_DIRTY_LINETIME(PIPE_C
))
2799 I915_WRITE(PIPE_WM_LINETIME(PIPE_C
), results
->wm_linetime
[2]);
2801 if (dirty
& WM_DIRTY_DDB
) {
2802 if (IS_HASWELL(dev
) || IS_BROADWELL(dev
)) {
2803 val
= I915_READ(WM_MISC
);
2804 if (results
->partitioning
== INTEL_DDB_PART_1_2
)
2805 val
&= ~WM_MISC_DATA_PARTITION_5_6
;
2807 val
|= WM_MISC_DATA_PARTITION_5_6
;
2808 I915_WRITE(WM_MISC
, val
);
2810 val
= I915_READ(DISP_ARB_CTL2
);
2811 if (results
->partitioning
== INTEL_DDB_PART_1_2
)
2812 val
&= ~DISP_DATA_PARTITION_5_6
;
2814 val
|= DISP_DATA_PARTITION_5_6
;
2815 I915_WRITE(DISP_ARB_CTL2
, val
);
2819 if (dirty
& WM_DIRTY_FBC
) {
2820 val
= I915_READ(DISP_ARB_CTL
);
2821 if (results
->enable_fbc_wm
)
2822 val
&= ~DISP_FBC_WM_DIS
;
2824 val
|= DISP_FBC_WM_DIS
;
2825 I915_WRITE(DISP_ARB_CTL
, val
);
2828 if (dirty
& WM_DIRTY_LP(1) &&
2829 previous
->wm_lp_spr
[0] != results
->wm_lp_spr
[0])
2830 I915_WRITE(WM1S_LP_ILK
, results
->wm_lp_spr
[0]);
2832 if (INTEL_INFO(dev
)->gen
>= 7) {
2833 if (dirty
& WM_DIRTY_LP(2) && previous
->wm_lp_spr
[1] != results
->wm_lp_spr
[1])
2834 I915_WRITE(WM2S_LP_IVB
, results
->wm_lp_spr
[1]);
2835 if (dirty
& WM_DIRTY_LP(3) && previous
->wm_lp_spr
[2] != results
->wm_lp_spr
[2])
2836 I915_WRITE(WM3S_LP_IVB
, results
->wm_lp_spr
[2]);
2839 if (dirty
& WM_DIRTY_LP(1) && previous
->wm_lp
[0] != results
->wm_lp
[0])
2840 I915_WRITE(WM1_LP_ILK
, results
->wm_lp
[0]);
2841 if (dirty
& WM_DIRTY_LP(2) && previous
->wm_lp
[1] != results
->wm_lp
[1])
2842 I915_WRITE(WM2_LP_ILK
, results
->wm_lp
[1]);
2843 if (dirty
& WM_DIRTY_LP(3) && previous
->wm_lp
[2] != results
->wm_lp
[2])
2844 I915_WRITE(WM3_LP_ILK
, results
->wm_lp
[2]);
2846 dev_priv
->wm
.hw
= *results
;
2849 bool ilk_disable_lp_wm(struct drm_device
*dev
)
2851 struct drm_i915_private
*dev_priv
= to_i915(dev
);
2853 return _ilk_disable_lp_wm(dev_priv
, WM_DIRTY_LP_ALL
);
2857 * On gen9, we need to allocate Display Data Buffer (DDB) portions to the
2858 * different active planes.
2861 #define SKL_DDB_SIZE 896 /* in blocks */
2862 #define BXT_DDB_SIZE 512
2865 * Return the index of a plane in the SKL DDB and wm result arrays. Primary
2866 * plane is always in slot 0, cursor is always in slot I915_MAX_PLANES-1, and
2867 * other universal planes are in indices 1..n. Note that this may leave unused
2868 * indices between the top "sprite" plane and the cursor.
2871 skl_wm_plane_id(const struct intel_plane
*plane
)
2873 switch (plane
->base
.type
) {
2874 case DRM_PLANE_TYPE_PRIMARY
:
2876 case DRM_PLANE_TYPE_CURSOR
:
2877 return PLANE_CURSOR
;
2878 case DRM_PLANE_TYPE_OVERLAY
:
2879 return plane
->plane
+ 1;
2881 MISSING_CASE(plane
->base
.type
);
2882 return plane
->plane
;
2887 skl_ddb_get_pipe_allocation_limits(struct drm_device
*dev
,
2888 const struct intel_crtc_state
*cstate
,
2889 struct skl_ddb_entry
*alloc
, /* out */
2890 int *num_active
/* out */)
2892 struct drm_atomic_state
*state
= cstate
->base
.state
;
2893 struct intel_atomic_state
*intel_state
= to_intel_atomic_state(state
);
2894 struct drm_i915_private
*dev_priv
= to_i915(dev
);
2895 struct drm_crtc
*for_crtc
= cstate
->base
.crtc
;
2896 unsigned int pipe_size
, ddb_size
;
2897 int nth_active_pipe
;
2898 int pipe
= to_intel_crtc(for_crtc
)->pipe
;
2900 if (WARN_ON(!state
) || !cstate
->base
.active
) {
2903 *num_active
= hweight32(dev_priv
->active_crtcs
);
2907 if (intel_state
->active_pipe_changes
)
2908 *num_active
= hweight32(intel_state
->active_crtcs
);
2910 *num_active
= hweight32(dev_priv
->active_crtcs
);
2912 if (IS_BROXTON(dev
))
2913 ddb_size
= BXT_DDB_SIZE
;
2915 ddb_size
= SKL_DDB_SIZE
;
2917 ddb_size
-= 4; /* 4 blocks for bypass path allocation */
2920 * If the state doesn't change the active CRTC's, then there's
2921 * no need to recalculate; the existing pipe allocation limits
2922 * should remain unchanged. Note that we're safe from racing
2923 * commits since any racing commit that changes the active CRTC
2924 * list would need to grab _all_ crtc locks, including the one
2925 * we currently hold.
2927 if (!intel_state
->active_pipe_changes
) {
2928 *alloc
= dev_priv
->wm
.skl_hw
.ddb
.pipe
[pipe
];
2932 nth_active_pipe
= hweight32(intel_state
->active_crtcs
&
2933 (drm_crtc_mask(for_crtc
) - 1));
2934 pipe_size
= ddb_size
/ hweight32(intel_state
->active_crtcs
);
2935 alloc
->start
= nth_active_pipe
* ddb_size
/ *num_active
;
2936 alloc
->end
= alloc
->start
+ pipe_size
;
2939 static unsigned int skl_cursor_allocation(int num_active
)
2941 if (num_active
== 1)
2947 static void skl_ddb_entry_init_from_hw(struct skl_ddb_entry
*entry
, u32 reg
)
2949 entry
->start
= reg
& 0x3ff;
2950 entry
->end
= (reg
>> 16) & 0x3ff;
2955 void skl_ddb_get_hw_state(struct drm_i915_private
*dev_priv
,
2956 struct skl_ddb_allocation
*ddb
/* out */)
2962 memset(ddb
, 0, sizeof(*ddb
));
2964 for_each_pipe(dev_priv
, pipe
) {
2965 enum intel_display_power_domain power_domain
;
2967 power_domain
= POWER_DOMAIN_PIPE(pipe
);
2968 if (!intel_display_power_get_if_enabled(dev_priv
, power_domain
))
2971 for_each_plane(dev_priv
, pipe
, plane
) {
2972 val
= I915_READ(PLANE_BUF_CFG(pipe
, plane
));
2973 skl_ddb_entry_init_from_hw(&ddb
->plane
[pipe
][plane
],
2977 val
= I915_READ(CUR_BUF_CFG(pipe
));
2978 skl_ddb_entry_init_from_hw(&ddb
->plane
[pipe
][PLANE_CURSOR
],
2981 intel_display_power_put(dev_priv
, power_domain
);
2986 * Determines the downscale amount of a plane for the purposes of watermark calculations.
2987 * The bspec defines downscale amount as:
2990 * Horizontal down scale amount = maximum[1, Horizontal source size /
2991 * Horizontal destination size]
2992 * Vertical down scale amount = maximum[1, Vertical source size /
2993 * Vertical destination size]
2994 * Total down scale amount = Horizontal down scale amount *
2995 * Vertical down scale amount
2998 * Return value is provided in 16.16 fixed point form to retain fractional part.
2999 * Caller should take care of dividing & rounding off the value.
3002 skl_plane_downscale_amount(const struct intel_plane_state
*pstate
)
3004 uint32_t downscale_h
, downscale_w
;
3005 uint32_t src_w
, src_h
, dst_w
, dst_h
;
3007 if (WARN_ON(!pstate
->base
.visible
))
3008 return DRM_PLANE_HELPER_NO_SCALING
;
3010 /* n.b., src is 16.16 fixed point, dst is whole integer */
3011 src_w
= drm_rect_width(&pstate
->base
.src
);
3012 src_h
= drm_rect_height(&pstate
->base
.src
);
3013 dst_w
= drm_rect_width(&pstate
->base
.dst
);
3014 dst_h
= drm_rect_height(&pstate
->base
.dst
);
3015 if (intel_rotation_90_or_270(pstate
->base
.rotation
))
3018 downscale_h
= max(src_h
/ dst_h
, (uint32_t)DRM_PLANE_HELPER_NO_SCALING
);
3019 downscale_w
= max(src_w
/ dst_w
, (uint32_t)DRM_PLANE_HELPER_NO_SCALING
);
3021 /* Provide result in 16.16 fixed point */
3022 return (uint64_t)downscale_w
* downscale_h
>> 16;
3026 skl_plane_relative_data_rate(const struct intel_crtc_state
*cstate
,
3027 const struct drm_plane_state
*pstate
,
3030 struct intel_plane_state
*intel_pstate
= to_intel_plane_state(pstate
);
3031 struct drm_framebuffer
*fb
= pstate
->fb
;
3032 uint32_t down_scale_amount
, data_rate
;
3033 uint32_t width
= 0, height
= 0;
3034 unsigned format
= fb
? fb
->pixel_format
: DRM_FORMAT_XRGB8888
;
3036 if (!intel_pstate
->base
.visible
)
3038 if (pstate
->plane
->type
== DRM_PLANE_TYPE_CURSOR
)
3040 if (y
&& format
!= DRM_FORMAT_NV12
)
3043 width
= drm_rect_width(&intel_pstate
->base
.src
) >> 16;
3044 height
= drm_rect_height(&intel_pstate
->base
.src
) >> 16;
3046 if (intel_rotation_90_or_270(pstate
->rotation
))
3047 swap(width
, height
);
3049 /* for planar format */
3050 if (format
== DRM_FORMAT_NV12
) {
3051 if (y
) /* y-plane data rate */
3052 data_rate
= width
* height
*
3053 drm_format_plane_cpp(format
, 0);
3054 else /* uv-plane data rate */
3055 data_rate
= (width
/ 2) * (height
/ 2) *
3056 drm_format_plane_cpp(format
, 1);
3058 /* for packed formats */
3059 data_rate
= width
* height
* drm_format_plane_cpp(format
, 0);
3062 down_scale_amount
= skl_plane_downscale_amount(intel_pstate
);
3064 return (uint64_t)data_rate
* down_scale_amount
>> 16;
3068 * We don't overflow 32 bits. Worst case is 3 planes enabled, each fetching
3069 * a 8192x4096@32bpp framebuffer:
3070 * 3 * 4096 * 8192 * 4 < 2^32
3073 skl_get_total_relative_data_rate(struct intel_crtc_state
*intel_cstate
)
3075 struct drm_crtc_state
*cstate
= &intel_cstate
->base
;
3076 struct drm_atomic_state
*state
= cstate
->state
;
3077 struct drm_crtc
*crtc
= cstate
->crtc
;
3078 struct drm_device
*dev
= crtc
->dev
;
3079 struct intel_crtc
*intel_crtc
= to_intel_crtc(crtc
);
3080 const struct drm_plane
*plane
;
3081 const struct intel_plane
*intel_plane
;
3082 struct drm_plane_state
*pstate
;
3083 unsigned int rate
, total_data_rate
= 0;
3087 if (WARN_ON(!state
))
3090 /* Calculate and cache data rate for each plane */
3091 for_each_plane_in_state(state
, plane
, pstate
, i
) {
3092 id
= skl_wm_plane_id(to_intel_plane(plane
));
3093 intel_plane
= to_intel_plane(plane
);
3095 if (intel_plane
->pipe
!= intel_crtc
->pipe
)
3099 rate
= skl_plane_relative_data_rate(intel_cstate
,
3101 intel_cstate
->wm
.skl
.plane_data_rate
[id
] = rate
;
3104 rate
= skl_plane_relative_data_rate(intel_cstate
,
3106 intel_cstate
->wm
.skl
.plane_y_data_rate
[id
] = rate
;
3109 /* Calculate CRTC's total data rate from cached values */
3110 for_each_intel_plane_on_crtc(dev
, intel_crtc
, intel_plane
) {
3111 int id
= skl_wm_plane_id(intel_plane
);
3114 total_data_rate
+= intel_cstate
->wm
.skl
.plane_data_rate
[id
];
3115 total_data_rate
+= intel_cstate
->wm
.skl
.plane_y_data_rate
[id
];
3118 WARN_ON(cstate
->plane_mask
&& total_data_rate
== 0);
3120 return total_data_rate
;
3124 skl_ddb_min_alloc(const struct drm_plane_state
*pstate
,
3127 struct drm_framebuffer
*fb
= pstate
->fb
;
3128 struct intel_plane_state
*intel_pstate
= to_intel_plane_state(pstate
);
3129 uint32_t src_w
, src_h
;
3130 uint32_t min_scanlines
= 8;
3136 /* For packed formats, no y-plane, return 0 */
3137 if (y
&& fb
->pixel_format
!= DRM_FORMAT_NV12
)
3140 /* For Non Y-tile return 8-blocks */
3141 if (fb
->modifier
[0] != I915_FORMAT_MOD_Y_TILED
&&
3142 fb
->modifier
[0] != I915_FORMAT_MOD_Yf_TILED
)
3145 src_w
= drm_rect_width(&intel_pstate
->base
.src
) >> 16;
3146 src_h
= drm_rect_height(&intel_pstate
->base
.src
) >> 16;
3148 if (intel_rotation_90_or_270(pstate
->rotation
))
3151 /* Halve UV plane width and height for NV12 */
3152 if (fb
->pixel_format
== DRM_FORMAT_NV12
&& !y
) {
3157 if (fb
->pixel_format
== DRM_FORMAT_NV12
&& !y
)
3158 plane_bpp
= drm_format_plane_cpp(fb
->pixel_format
, 1);
3160 plane_bpp
= drm_format_plane_cpp(fb
->pixel_format
, 0);
3162 if (intel_rotation_90_or_270(pstate
->rotation
)) {
3163 switch (plane_bpp
) {
3177 WARN(1, "Unsupported pixel depth %u for rotation",
3183 return DIV_ROUND_UP((4 * src_w
* plane_bpp
), 512) * min_scanlines
/4 + 3;
3187 skl_allocate_pipe_ddb(struct intel_crtc_state
*cstate
,
3188 struct skl_ddb_allocation
*ddb
/* out */)
3190 struct drm_atomic_state
*state
= cstate
->base
.state
;
3191 struct drm_crtc
*crtc
= cstate
->base
.crtc
;
3192 struct drm_device
*dev
= crtc
->dev
;
3193 struct intel_crtc
*intel_crtc
= to_intel_crtc(crtc
);
3194 struct intel_plane
*intel_plane
;
3195 struct drm_plane
*plane
;
3196 struct drm_plane_state
*pstate
;
3197 enum pipe pipe
= intel_crtc
->pipe
;
3198 struct skl_ddb_entry
*alloc
= &ddb
->pipe
[pipe
];
3199 uint16_t alloc_size
, start
, cursor_blocks
;
3200 uint16_t *minimum
= cstate
->wm
.skl
.minimum_blocks
;
3201 uint16_t *y_minimum
= cstate
->wm
.skl
.minimum_y_blocks
;
3202 unsigned int total_data_rate
;
3206 if (WARN_ON(!state
))
3209 if (!cstate
->base
.active
) {
3210 ddb
->pipe
[pipe
].start
= ddb
->pipe
[pipe
].end
= 0;
3211 memset(ddb
->plane
[pipe
], 0, sizeof(ddb
->plane
[pipe
]));
3212 memset(ddb
->y_plane
[pipe
], 0, sizeof(ddb
->y_plane
[pipe
]));
3216 skl_ddb_get_pipe_allocation_limits(dev
, cstate
, alloc
, &num_active
);
3217 alloc_size
= skl_ddb_entry_size(alloc
);
3218 if (alloc_size
== 0) {
3219 memset(ddb
->plane
[pipe
], 0, sizeof(ddb
->plane
[pipe
]));
3223 cursor_blocks
= skl_cursor_allocation(num_active
);
3224 ddb
->plane
[pipe
][PLANE_CURSOR
].start
= alloc
->end
- cursor_blocks
;
3225 ddb
->plane
[pipe
][PLANE_CURSOR
].end
= alloc
->end
;
3227 alloc_size
-= cursor_blocks
;
3229 /* 1. Allocate the mininum required blocks for each active plane */
3230 for_each_plane_in_state(state
, plane
, pstate
, i
) {
3231 intel_plane
= to_intel_plane(plane
);
3232 id
= skl_wm_plane_id(intel_plane
);
3234 if (intel_plane
->pipe
!= pipe
)
3237 if (!to_intel_plane_state(pstate
)->base
.visible
) {
3242 if (plane
->type
== DRM_PLANE_TYPE_CURSOR
) {
3248 minimum
[id
] = skl_ddb_min_alloc(pstate
, 0);
3249 y_minimum
[id
] = skl_ddb_min_alloc(pstate
, 1);
3252 for (i
= 0; i
< PLANE_CURSOR
; i
++) {
3253 alloc_size
-= minimum
[i
];
3254 alloc_size
-= y_minimum
[i
];
3258 * 2. Distribute the remaining space in proportion to the amount of
3259 * data each plane needs to fetch from memory.
3261 * FIXME: we may not allocate every single block here.
3263 total_data_rate
= skl_get_total_relative_data_rate(cstate
);
3264 if (total_data_rate
== 0)
3267 start
= alloc
->start
;
3268 for_each_intel_plane_on_crtc(dev
, intel_crtc
, intel_plane
) {
3269 unsigned int data_rate
, y_data_rate
;
3270 uint16_t plane_blocks
, y_plane_blocks
= 0;
3271 int id
= skl_wm_plane_id(intel_plane
);
3273 data_rate
= cstate
->wm
.skl
.plane_data_rate
[id
];
3276 * allocation for (packed formats) or (uv-plane part of planar format):
3277 * promote the expression to 64 bits to avoid overflowing, the
3278 * result is < available as data_rate / total_data_rate < 1
3280 plane_blocks
= minimum
[id
];
3281 plane_blocks
+= div_u64((uint64_t)alloc_size
* data_rate
,
3284 /* Leave disabled planes at (0,0) */
3286 ddb
->plane
[pipe
][id
].start
= start
;
3287 ddb
->plane
[pipe
][id
].end
= start
+ plane_blocks
;
3290 start
+= plane_blocks
;
3293 * allocation for y_plane part of planar format:
3295 y_data_rate
= cstate
->wm
.skl
.plane_y_data_rate
[id
];
3297 y_plane_blocks
= y_minimum
[id
];
3298 y_plane_blocks
+= div_u64((uint64_t)alloc_size
* y_data_rate
,
3302 ddb
->y_plane
[pipe
][id
].start
= start
;
3303 ddb
->y_plane
[pipe
][id
].end
= start
+ y_plane_blocks
;
3306 start
+= y_plane_blocks
;
3312 static uint32_t skl_pipe_pixel_rate(const struct intel_crtc_state
*config
)
3314 /* TODO: Take into account the scalers once we support them */
3315 return config
->base
.adjusted_mode
.crtc_clock
;
3319 * The max latency should be 257 (max the punit can code is 255 and we add 2us
3320 * for the read latency) and cpp should always be <= 8, so that
3321 * should allow pixel_rate up to ~2 GHz which seems sufficient since max
3322 * 2xcdclk is 1350 MHz and the pixel rate should never exceed that.
3324 static uint32_t skl_wm_method1(uint32_t pixel_rate
, uint8_t cpp
, uint32_t latency
)
3326 uint32_t wm_intermediate_val
, ret
;
3331 wm_intermediate_val
= latency
* pixel_rate
* cpp
/ 512;
3332 ret
= DIV_ROUND_UP(wm_intermediate_val
, 1000);
3337 static uint32_t skl_wm_method2(uint32_t pixel_rate
, uint32_t pipe_htotal
,
3338 uint32_t horiz_pixels
, uint8_t cpp
,
3339 uint64_t tiling
, uint32_t latency
)
3342 uint32_t plane_bytes_per_line
, plane_blocks_per_line
;
3343 uint32_t wm_intermediate_val
;
3348 plane_bytes_per_line
= horiz_pixels
* cpp
;
3350 if (tiling
== I915_FORMAT_MOD_Y_TILED
||
3351 tiling
== I915_FORMAT_MOD_Yf_TILED
) {
3352 plane_bytes_per_line
*= 4;
3353 plane_blocks_per_line
= DIV_ROUND_UP(plane_bytes_per_line
, 512);
3354 plane_blocks_per_line
/= 4;
3355 } else if (tiling
== DRM_FORMAT_MOD_NONE
) {
3356 plane_blocks_per_line
= DIV_ROUND_UP(plane_bytes_per_line
, 512) + 1;
3358 plane_blocks_per_line
= DIV_ROUND_UP(plane_bytes_per_line
, 512);
3361 wm_intermediate_val
= latency
* pixel_rate
;
3362 ret
= DIV_ROUND_UP(wm_intermediate_val
, pipe_htotal
* 1000) *
3363 plane_blocks_per_line
;
3368 static uint32_t skl_adjusted_plane_pixel_rate(const struct intel_crtc_state
*cstate
,
3369 struct intel_plane_state
*pstate
)
3371 uint64_t adjusted_pixel_rate
;
3372 uint64_t downscale_amount
;
3373 uint64_t pixel_rate
;
3375 /* Shouldn't reach here on disabled planes... */
3376 if (WARN_ON(!pstate
->base
.visible
))
3380 * Adjusted plane pixel rate is just the pipe's adjusted pixel rate
3381 * with additional adjustments for plane-specific scaling.
3383 adjusted_pixel_rate
= skl_pipe_pixel_rate(cstate
);
3384 downscale_amount
= skl_plane_downscale_amount(pstate
);
3386 pixel_rate
= adjusted_pixel_rate
* downscale_amount
>> 16;
3387 WARN_ON(pixel_rate
!= clamp_t(uint32_t, pixel_rate
, 0, ~0));
3392 static int skl_compute_plane_wm(const struct drm_i915_private
*dev_priv
,
3393 struct intel_crtc_state
*cstate
,
3394 struct intel_plane_state
*intel_pstate
,
3395 uint16_t ddb_allocation
,
3397 uint16_t *out_blocks
, /* out */
3398 uint8_t *out_lines
, /* out */
3399 bool *enabled
/* out */)
3401 struct drm_plane_state
*pstate
= &intel_pstate
->base
;
3402 struct drm_framebuffer
*fb
= pstate
->fb
;
3403 uint32_t latency
= dev_priv
->wm
.skl_latency
[level
];
3404 uint32_t method1
, method2
;
3405 uint32_t plane_bytes_per_line
, plane_blocks_per_line
;
3406 uint32_t res_blocks
, res_lines
;
3407 uint32_t selected_result
;
3409 uint32_t width
= 0, height
= 0;
3410 uint32_t plane_pixel_rate
;
3412 if (latency
== 0 || !cstate
->base
.active
|| !intel_pstate
->base
.visible
) {
3417 width
= drm_rect_width(&intel_pstate
->base
.src
) >> 16;
3418 height
= drm_rect_height(&intel_pstate
->base
.src
) >> 16;
3420 if (intel_rotation_90_or_270(pstate
->rotation
))
3421 swap(width
, height
);
3423 cpp
= drm_format_plane_cpp(fb
->pixel_format
, 0);
3424 plane_pixel_rate
= skl_adjusted_plane_pixel_rate(cstate
, intel_pstate
);
3426 method1
= skl_wm_method1(plane_pixel_rate
, cpp
, latency
);
3427 method2
= skl_wm_method2(plane_pixel_rate
,
3428 cstate
->base
.adjusted_mode
.crtc_htotal
,
3434 plane_bytes_per_line
= width
* cpp
;
3435 plane_blocks_per_line
= DIV_ROUND_UP(plane_bytes_per_line
, 512);
3437 if (fb
->modifier
[0] == I915_FORMAT_MOD_Y_TILED
||
3438 fb
->modifier
[0] == I915_FORMAT_MOD_Yf_TILED
) {
3439 uint32_t min_scanlines
= 4;
3440 uint32_t y_tile_minimum
;
3441 if (intel_rotation_90_or_270(pstate
->rotation
)) {
3442 int cpp
= (fb
->pixel_format
== DRM_FORMAT_NV12
) ?
3443 drm_format_plane_cpp(fb
->pixel_format
, 1) :
3444 drm_format_plane_cpp(fb
->pixel_format
, 0);
3454 WARN(1, "Unsupported pixel depth for rotation");
3457 y_tile_minimum
= plane_blocks_per_line
* min_scanlines
;
3458 selected_result
= max(method2
, y_tile_minimum
);
3460 if ((ddb_allocation
/ plane_blocks_per_line
) >= 1)
3461 selected_result
= min(method1
, method2
);
3463 selected_result
= method1
;
3466 res_blocks
= selected_result
+ 1;
3467 res_lines
= DIV_ROUND_UP(selected_result
, plane_blocks_per_line
);
3469 if (level
>= 1 && level
<= 7) {
3470 if (fb
->modifier
[0] == I915_FORMAT_MOD_Y_TILED
||
3471 fb
->modifier
[0] == I915_FORMAT_MOD_Yf_TILED
)
3477 if (res_blocks
>= ddb_allocation
|| res_lines
> 31) {
3481 * If there are no valid level 0 watermarks, then we can't
3482 * support this display configuration.
3487 DRM_DEBUG_KMS("Requested display configuration exceeds system watermark limitations\n");
3488 DRM_DEBUG_KMS("Plane %d.%d: blocks required = %u/%u, lines required = %u/31\n",
3489 to_intel_crtc(cstate
->base
.crtc
)->pipe
,
3490 skl_wm_plane_id(to_intel_plane(pstate
->plane
)),
3491 res_blocks
, ddb_allocation
, res_lines
);
3497 *out_blocks
= res_blocks
;
3498 *out_lines
= res_lines
;
3505 skl_compute_wm_level(const struct drm_i915_private
*dev_priv
,
3506 struct skl_ddb_allocation
*ddb
,
3507 struct intel_crtc_state
*cstate
,
3509 struct skl_wm_level
*result
)
3511 struct drm_atomic_state
*state
= cstate
->base
.state
;
3512 struct intel_crtc
*intel_crtc
= to_intel_crtc(cstate
->base
.crtc
);
3513 struct drm_plane
*plane
;
3514 struct intel_plane
*intel_plane
;
3515 struct intel_plane_state
*intel_pstate
;
3516 uint16_t ddb_blocks
;
3517 enum pipe pipe
= intel_crtc
->pipe
;
3521 * We'll only calculate watermarks for planes that are actually
3522 * enabled, so make sure all other planes are set as disabled.
3524 memset(result
, 0, sizeof(*result
));
3526 for_each_intel_plane_mask(&dev_priv
->drm
,
3528 cstate
->base
.plane_mask
) {
3529 int i
= skl_wm_plane_id(intel_plane
);
3531 plane
= &intel_plane
->base
;
3532 intel_pstate
= NULL
;
3535 intel_atomic_get_existing_plane_state(state
,
3539 * Note: If we start supporting multiple pending atomic commits
3540 * against the same planes/CRTC's in the future, plane->state
3541 * will no longer be the correct pre-state to use for the
3542 * calculations here and we'll need to change where we get the
3543 * 'unchanged' plane data from.
3545 * For now this is fine because we only allow one queued commit
3546 * against a CRTC. Even if the plane isn't modified by this
3547 * transaction and we don't have a plane lock, we still have
3548 * the CRTC's lock, so we know that no other transactions are
3549 * racing with us to update it.
3552 intel_pstate
= to_intel_plane_state(plane
->state
);
3554 WARN_ON(!intel_pstate
->base
.fb
);
3556 ddb_blocks
= skl_ddb_entry_size(&ddb
->plane
[pipe
][i
]);
3558 ret
= skl_compute_plane_wm(dev_priv
,
3563 &result
->plane_res_b
[i
],
3564 &result
->plane_res_l
[i
],
3565 &result
->plane_en
[i
]);
3574 skl_compute_linetime_wm(struct intel_crtc_state
*cstate
)
3576 if (!cstate
->base
.active
)
3579 if (WARN_ON(skl_pipe_pixel_rate(cstate
) == 0))
3582 return DIV_ROUND_UP(8 * cstate
->base
.adjusted_mode
.crtc_htotal
* 1000,
3583 skl_pipe_pixel_rate(cstate
));
3586 static void skl_compute_transition_wm(struct intel_crtc_state
*cstate
,
3587 struct skl_wm_level
*trans_wm
/* out */)
3589 struct drm_crtc
*crtc
= cstate
->base
.crtc
;
3590 struct intel_crtc
*intel_crtc
= to_intel_crtc(crtc
);
3591 struct intel_plane
*intel_plane
;
3593 if (!cstate
->base
.active
)
3596 /* Until we know more, just disable transition WMs */
3597 for_each_intel_plane_on_crtc(crtc
->dev
, intel_crtc
, intel_plane
) {
3598 int i
= skl_wm_plane_id(intel_plane
);
3600 trans_wm
->plane_en
[i
] = false;
3604 static int skl_build_pipe_wm(struct intel_crtc_state
*cstate
,
3605 struct skl_ddb_allocation
*ddb
,
3606 struct skl_pipe_wm
*pipe_wm
)
3608 struct drm_device
*dev
= cstate
->base
.crtc
->dev
;
3609 const struct drm_i915_private
*dev_priv
= to_i915(dev
);
3610 int level
, max_level
= ilk_wm_max_level(dev
);
3613 for (level
= 0; level
<= max_level
; level
++) {
3614 ret
= skl_compute_wm_level(dev_priv
, ddb
, cstate
,
3615 level
, &pipe_wm
->wm
[level
]);
3619 pipe_wm
->linetime
= skl_compute_linetime_wm(cstate
);
3621 skl_compute_transition_wm(cstate
, &pipe_wm
->trans_wm
);
3626 static void skl_compute_wm_results(struct drm_device
*dev
,
3627 struct skl_pipe_wm
*p_wm
,
3628 struct skl_wm_values
*r
,
3629 struct intel_crtc
*intel_crtc
)
3631 int level
, max_level
= ilk_wm_max_level(dev
);
3632 enum pipe pipe
= intel_crtc
->pipe
;
3636 for (level
= 0; level
<= max_level
; level
++) {
3637 for (i
= 0; i
< intel_num_planes(intel_crtc
); i
++) {
3640 temp
|= p_wm
->wm
[level
].plane_res_l
[i
] <<
3641 PLANE_WM_LINES_SHIFT
;
3642 temp
|= p_wm
->wm
[level
].plane_res_b
[i
];
3643 if (p_wm
->wm
[level
].plane_en
[i
])
3644 temp
|= PLANE_WM_EN
;
3646 r
->plane
[pipe
][i
][level
] = temp
;
3651 temp
|= p_wm
->wm
[level
].plane_res_l
[PLANE_CURSOR
] << PLANE_WM_LINES_SHIFT
;
3652 temp
|= p_wm
->wm
[level
].plane_res_b
[PLANE_CURSOR
];
3654 if (p_wm
->wm
[level
].plane_en
[PLANE_CURSOR
])
3655 temp
|= PLANE_WM_EN
;
3657 r
->plane
[pipe
][PLANE_CURSOR
][level
] = temp
;
3661 /* transition WMs */
3662 for (i
= 0; i
< intel_num_planes(intel_crtc
); i
++) {
3664 temp
|= p_wm
->trans_wm
.plane_res_l
[i
] << PLANE_WM_LINES_SHIFT
;
3665 temp
|= p_wm
->trans_wm
.plane_res_b
[i
];
3666 if (p_wm
->trans_wm
.plane_en
[i
])
3667 temp
|= PLANE_WM_EN
;
3669 r
->plane_trans
[pipe
][i
] = temp
;
3673 temp
|= p_wm
->trans_wm
.plane_res_l
[PLANE_CURSOR
] << PLANE_WM_LINES_SHIFT
;
3674 temp
|= p_wm
->trans_wm
.plane_res_b
[PLANE_CURSOR
];
3675 if (p_wm
->trans_wm
.plane_en
[PLANE_CURSOR
])
3676 temp
|= PLANE_WM_EN
;
3678 r
->plane_trans
[pipe
][PLANE_CURSOR
] = temp
;
3680 r
->wm_linetime
[pipe
] = p_wm
->linetime
;
3683 static void skl_ddb_entry_write(struct drm_i915_private
*dev_priv
,
3685 const struct skl_ddb_entry
*entry
)
3688 I915_WRITE(reg
, (entry
->end
- 1) << 16 | entry
->start
);
3693 static void skl_write_wm_values(struct drm_i915_private
*dev_priv
,
3694 const struct skl_wm_values
*new)
3696 struct drm_device
*dev
= &dev_priv
->drm
;
3697 struct intel_crtc
*crtc
;
3699 for_each_intel_crtc(dev
, crtc
) {
3700 int i
, level
, max_level
= ilk_wm_max_level(dev
);
3701 enum pipe pipe
= crtc
->pipe
;
3703 if ((new->dirty_pipes
& drm_crtc_mask(&crtc
->base
)) == 0)
3708 I915_WRITE(PIPE_WM_LINETIME(pipe
), new->wm_linetime
[pipe
]);
3710 for (level
= 0; level
<= max_level
; level
++) {
3711 for (i
= 0; i
< intel_num_planes(crtc
); i
++)
3712 I915_WRITE(PLANE_WM(pipe
, i
, level
),
3713 new->plane
[pipe
][i
][level
]);
3714 I915_WRITE(CUR_WM(pipe
, level
),
3715 new->plane
[pipe
][PLANE_CURSOR
][level
]);
3717 for (i
= 0; i
< intel_num_planes(crtc
); i
++)
3718 I915_WRITE(PLANE_WM_TRANS(pipe
, i
),
3719 new->plane_trans
[pipe
][i
]);
3720 I915_WRITE(CUR_WM_TRANS(pipe
),
3721 new->plane_trans
[pipe
][PLANE_CURSOR
]);
3723 for (i
= 0; i
< intel_num_planes(crtc
); i
++) {
3724 skl_ddb_entry_write(dev_priv
,
3725 PLANE_BUF_CFG(pipe
, i
),
3726 &new->ddb
.plane
[pipe
][i
]);
3727 skl_ddb_entry_write(dev_priv
,
3728 PLANE_NV12_BUF_CFG(pipe
, i
),
3729 &new->ddb
.y_plane
[pipe
][i
]);
3732 skl_ddb_entry_write(dev_priv
, CUR_BUF_CFG(pipe
),
3733 &new->ddb
.plane
[pipe
][PLANE_CURSOR
]);
3738 * When setting up a new DDB allocation arrangement, we need to correctly
3739 * sequence the times at which the new allocations for the pipes are taken into
3740 * account or we'll have pipes fetching from space previously allocated to
3743 * Roughly the sequence looks like:
3744 * 1. re-allocate the pipe(s) with the allocation being reduced and not
3745 * overlapping with a previous light-up pipe (another way to put it is:
3746 * pipes with their new allocation strickly included into their old ones).
3747 * 2. re-allocate the other pipes that get their allocation reduced
3748 * 3. allocate the pipes having their allocation increased
3750 * Steps 1. and 2. are here to take care of the following case:
3751 * - Initially DDB looks like this:
3754 * - pipe B has a reduced DDB allocation that overlaps with the old pipe C
3758 * We need to sequence the re-allocation: C, B, A (and not B, C, A).
3762 skl_wm_flush_pipe(struct drm_i915_private
*dev_priv
, enum pipe pipe
, int pass
)
3766 DRM_DEBUG_KMS("flush pipe %c (pass %d)\n", pipe_name(pipe
), pass
);
3768 for_each_plane(dev_priv
, pipe
, plane
) {
3769 I915_WRITE(PLANE_SURF(pipe
, plane
),
3770 I915_READ(PLANE_SURF(pipe
, plane
)));
3772 I915_WRITE(CURBASE(pipe
), I915_READ(CURBASE(pipe
)));
3776 skl_ddb_allocation_included(const struct skl_ddb_allocation
*old
,
3777 const struct skl_ddb_allocation
*new,
3780 uint16_t old_size
, new_size
;
3782 old_size
= skl_ddb_entry_size(&old
->pipe
[pipe
]);
3783 new_size
= skl_ddb_entry_size(&new->pipe
[pipe
]);
3785 return old_size
!= new_size
&&
3786 new->pipe
[pipe
].start
>= old
->pipe
[pipe
].start
&&
3787 new->pipe
[pipe
].end
<= old
->pipe
[pipe
].end
;
3790 static void skl_flush_wm_values(struct drm_i915_private
*dev_priv
,
3791 struct skl_wm_values
*new_values
)
3793 struct drm_device
*dev
= &dev_priv
->drm
;
3794 struct skl_ddb_allocation
*cur_ddb
, *new_ddb
;
3795 bool reallocated
[I915_MAX_PIPES
] = {};
3796 struct intel_crtc
*crtc
;
3799 new_ddb
= &new_values
->ddb
;
3800 cur_ddb
= &dev_priv
->wm
.skl_hw
.ddb
;
3803 * First pass: flush the pipes with the new allocation contained into
3806 * We'll wait for the vblank on those pipes to ensure we can safely
3807 * re-allocate the freed space without this pipe fetching from it.
3809 for_each_intel_crtc(dev
, crtc
) {
3815 if (!skl_ddb_allocation_included(cur_ddb
, new_ddb
, pipe
))
3818 skl_wm_flush_pipe(dev_priv
, pipe
, 1);
3819 intel_wait_for_vblank(dev
, pipe
);
3821 reallocated
[pipe
] = true;
3826 * Second pass: flush the pipes that are having their allocation
3827 * reduced, but overlapping with a previous allocation.
3829 * Here as well we need to wait for the vblank to make sure the freed
3830 * space is not used anymore.
3832 for_each_intel_crtc(dev
, crtc
) {
3838 if (reallocated
[pipe
])
3841 if (skl_ddb_entry_size(&new_ddb
->pipe
[pipe
]) <
3842 skl_ddb_entry_size(&cur_ddb
->pipe
[pipe
])) {
3843 skl_wm_flush_pipe(dev_priv
, pipe
, 2);
3844 intel_wait_for_vblank(dev
, pipe
);
3845 reallocated
[pipe
] = true;
3850 * Third pass: flush the pipes that got more space allocated.
3852 * We don't need to actively wait for the update here, next vblank
3853 * will just get more DDB space with the correct WM values.
3855 for_each_intel_crtc(dev
, crtc
) {
3862 * At this point, only the pipes more space than before are
3863 * left to re-allocate.
3865 if (reallocated
[pipe
])
3868 skl_wm_flush_pipe(dev_priv
, pipe
, 3);
3872 static int skl_update_pipe_wm(struct drm_crtc_state
*cstate
,
3873 struct skl_ddb_allocation
*ddb
, /* out */
3874 struct skl_pipe_wm
*pipe_wm
, /* out */
3875 bool *changed
/* out */)
3877 struct intel_crtc
*intel_crtc
= to_intel_crtc(cstate
->crtc
);
3878 struct intel_crtc_state
*intel_cstate
= to_intel_crtc_state(cstate
);
3881 ret
= skl_build_pipe_wm(intel_cstate
, ddb
, pipe_wm
);
3885 if (!memcmp(&intel_crtc
->wm
.active
.skl
, pipe_wm
, sizeof(*pipe_wm
)))
3894 pipes_modified(struct drm_atomic_state
*state
)
3896 struct drm_crtc
*crtc
;
3897 struct drm_crtc_state
*cstate
;
3898 uint32_t i
, ret
= 0;
3900 for_each_crtc_in_state(state
, crtc
, cstate
, i
)
3901 ret
|= drm_crtc_mask(crtc
);
3907 skl_compute_ddb(struct drm_atomic_state
*state
)
3909 struct drm_device
*dev
= state
->dev
;
3910 struct drm_i915_private
*dev_priv
= to_i915(dev
);
3911 struct intel_atomic_state
*intel_state
= to_intel_atomic_state(state
);
3912 struct intel_crtc
*intel_crtc
;
3913 struct skl_ddb_allocation
*ddb
= &intel_state
->wm_results
.ddb
;
3914 uint32_t realloc_pipes
= pipes_modified(state
);
3918 * If this is our first atomic update following hardware readout,
3919 * we can't trust the DDB that the BIOS programmed for us. Let's
3920 * pretend that all pipes switched active status so that we'll
3921 * ensure a full DDB recompute.
3923 if (dev_priv
->wm
.distrust_bios_wm
)
3924 intel_state
->active_pipe_changes
= ~0;
3927 * If the modeset changes which CRTC's are active, we need to
3928 * recompute the DDB allocation for *all* active pipes, even
3929 * those that weren't otherwise being modified in any way by this
3930 * atomic commit. Due to the shrinking of the per-pipe allocations
3931 * when new active CRTC's are added, it's possible for a pipe that
3932 * we were already using and aren't changing at all here to suddenly
3933 * become invalid if its DDB needs exceeds its new allocation.
3935 * Note that if we wind up doing a full DDB recompute, we can't let
3936 * any other display updates race with this transaction, so we need
3937 * to grab the lock on *all* CRTC's.
3939 if (intel_state
->active_pipe_changes
) {
3941 intel_state
->wm_results
.dirty_pipes
= ~0;
3944 for_each_intel_crtc_mask(dev
, intel_crtc
, realloc_pipes
) {
3945 struct intel_crtc_state
*cstate
;
3947 cstate
= intel_atomic_get_crtc_state(state
, intel_crtc
);
3949 return PTR_ERR(cstate
);
3951 ret
= skl_allocate_pipe_ddb(cstate
, ddb
);
3960 skl_compute_wm(struct drm_atomic_state
*state
)
3962 struct drm_crtc
*crtc
;
3963 struct drm_crtc_state
*cstate
;
3964 struct intel_atomic_state
*intel_state
= to_intel_atomic_state(state
);
3965 struct skl_wm_values
*results
= &intel_state
->wm_results
;
3966 struct skl_pipe_wm
*pipe_wm
;
3967 bool changed
= false;
3971 * If this transaction isn't actually touching any CRTC's, don't
3972 * bother with watermark calculation. Note that if we pass this
3973 * test, we're guaranteed to hold at least one CRTC state mutex,
3974 * which means we can safely use values like dev_priv->active_crtcs
3975 * since any racing commits that want to update them would need to
3976 * hold _all_ CRTC state mutexes.
3978 for_each_crtc_in_state(state
, crtc
, cstate
, i
)
3983 /* Clear all dirty flags */
3984 results
->dirty_pipes
= 0;
3986 ret
= skl_compute_ddb(state
);
3991 * Calculate WM's for all pipes that are part of this transaction.
3992 * Note that the DDB allocation above may have added more CRTC's that
3993 * weren't otherwise being modified (and set bits in dirty_pipes) if
3994 * pipe allocations had to change.
3996 * FIXME: Now that we're doing this in the atomic check phase, we
3997 * should allow skl_update_pipe_wm() to return failure in cases where
3998 * no suitable watermark values can be found.
4000 for_each_crtc_in_state(state
, crtc
, cstate
, i
) {
4001 struct intel_crtc
*intel_crtc
= to_intel_crtc(crtc
);
4002 struct intel_crtc_state
*intel_cstate
=
4003 to_intel_crtc_state(cstate
);
4005 pipe_wm
= &intel_cstate
->wm
.skl
.optimal
;
4006 ret
= skl_update_pipe_wm(cstate
, &results
->ddb
, pipe_wm
,
4012 results
->dirty_pipes
|= drm_crtc_mask(crtc
);
4014 if ((results
->dirty_pipes
& drm_crtc_mask(crtc
)) == 0)
4015 /* This pipe's WM's did not change */
4018 intel_cstate
->update_wm_pre
= true;
4019 skl_compute_wm_results(crtc
->dev
, pipe_wm
, results
, intel_crtc
);
4025 static void skl_update_wm(struct drm_crtc
*crtc
)
4027 struct intel_crtc
*intel_crtc
= to_intel_crtc(crtc
);
4028 struct drm_device
*dev
= crtc
->dev
;
4029 struct drm_i915_private
*dev_priv
= to_i915(dev
);
4030 struct skl_wm_values
*results
= &dev_priv
->wm
.skl_results
;
4031 struct intel_crtc_state
*cstate
= to_intel_crtc_state(crtc
->state
);
4032 struct skl_pipe_wm
*pipe_wm
= &cstate
->wm
.skl
.optimal
;
4034 if ((results
->dirty_pipes
& drm_crtc_mask(crtc
)) == 0)
4037 intel_crtc
->wm
.active
.skl
= *pipe_wm
;
4039 mutex_lock(&dev_priv
->wm
.wm_mutex
);
4041 skl_write_wm_values(dev_priv
, results
);
4042 skl_flush_wm_values(dev_priv
, results
);
4044 /* store the new configuration */
4045 dev_priv
->wm
.skl_hw
= *results
;
4047 mutex_unlock(&dev_priv
->wm
.wm_mutex
);
4050 static void ilk_compute_wm_config(struct drm_device
*dev
,
4051 struct intel_wm_config
*config
)
4053 struct intel_crtc
*crtc
;
4055 /* Compute the currently _active_ config */
4056 for_each_intel_crtc(dev
, crtc
) {
4057 const struct intel_pipe_wm
*wm
= &crtc
->wm
.active
.ilk
;
4059 if (!wm
->pipe_enabled
)
4062 config
->sprites_enabled
|= wm
->sprites_enabled
;
4063 config
->sprites_scaled
|= wm
->sprites_scaled
;
4064 config
->num_pipes_active
++;
4068 static void ilk_program_watermarks(struct drm_i915_private
*dev_priv
)
4070 struct drm_device
*dev
= &dev_priv
->drm
;
4071 struct intel_pipe_wm lp_wm_1_2
= {}, lp_wm_5_6
= {}, *best_lp_wm
;
4072 struct ilk_wm_maximums max
;
4073 struct intel_wm_config config
= {};
4074 struct ilk_wm_values results
= {};
4075 enum intel_ddb_partitioning partitioning
;
4077 ilk_compute_wm_config(dev
, &config
);
4079 ilk_compute_wm_maximums(dev
, 1, &config
, INTEL_DDB_PART_1_2
, &max
);
4080 ilk_wm_merge(dev
, &config
, &max
, &lp_wm_1_2
);
4082 /* 5/6 split only in single pipe config on IVB+ */
4083 if (INTEL_INFO(dev
)->gen
>= 7 &&
4084 config
.num_pipes_active
== 1 && config
.sprites_enabled
) {
4085 ilk_compute_wm_maximums(dev
, 1, &config
, INTEL_DDB_PART_5_6
, &max
);
4086 ilk_wm_merge(dev
, &config
, &max
, &lp_wm_5_6
);
4088 best_lp_wm
= ilk_find_best_result(dev
, &lp_wm_1_2
, &lp_wm_5_6
);
4090 best_lp_wm
= &lp_wm_1_2
;
4093 partitioning
= (best_lp_wm
== &lp_wm_1_2
) ?
4094 INTEL_DDB_PART_1_2
: INTEL_DDB_PART_5_6
;
4096 ilk_compute_wm_results(dev
, best_lp_wm
, partitioning
, &results
);
4098 ilk_write_wm_values(dev_priv
, &results
);
4101 static void ilk_initial_watermarks(struct intel_crtc_state
*cstate
)
4103 struct drm_i915_private
*dev_priv
= to_i915(cstate
->base
.crtc
->dev
);
4104 struct intel_crtc
*intel_crtc
= to_intel_crtc(cstate
->base
.crtc
);
4106 mutex_lock(&dev_priv
->wm
.wm_mutex
);
4107 intel_crtc
->wm
.active
.ilk
= cstate
->wm
.ilk
.intermediate
;
4108 ilk_program_watermarks(dev_priv
);
4109 mutex_unlock(&dev_priv
->wm
.wm_mutex
);
4112 static void ilk_optimize_watermarks(struct intel_crtc_state
*cstate
)
4114 struct drm_i915_private
*dev_priv
= to_i915(cstate
->base
.crtc
->dev
);
4115 struct intel_crtc
*intel_crtc
= to_intel_crtc(cstate
->base
.crtc
);
4117 mutex_lock(&dev_priv
->wm
.wm_mutex
);
4118 if (cstate
->wm
.need_postvbl_update
) {
4119 intel_crtc
->wm
.active
.ilk
= cstate
->wm
.ilk
.optimal
;
4120 ilk_program_watermarks(dev_priv
);
4122 mutex_unlock(&dev_priv
->wm
.wm_mutex
);
4125 static void skl_pipe_wm_active_state(uint32_t val
,
4126 struct skl_pipe_wm
*active
,
4132 bool is_enabled
= (val
& PLANE_WM_EN
) != 0;
4136 active
->wm
[level
].plane_en
[i
] = is_enabled
;
4137 active
->wm
[level
].plane_res_b
[i
] =
4138 val
& PLANE_WM_BLOCKS_MASK
;
4139 active
->wm
[level
].plane_res_l
[i
] =
4140 (val
>> PLANE_WM_LINES_SHIFT
) &
4141 PLANE_WM_LINES_MASK
;
4143 active
->wm
[level
].plane_en
[PLANE_CURSOR
] = is_enabled
;
4144 active
->wm
[level
].plane_res_b
[PLANE_CURSOR
] =
4145 val
& PLANE_WM_BLOCKS_MASK
;
4146 active
->wm
[level
].plane_res_l
[PLANE_CURSOR
] =
4147 (val
>> PLANE_WM_LINES_SHIFT
) &
4148 PLANE_WM_LINES_MASK
;
4152 active
->trans_wm
.plane_en
[i
] = is_enabled
;
4153 active
->trans_wm
.plane_res_b
[i
] =
4154 val
& PLANE_WM_BLOCKS_MASK
;
4155 active
->trans_wm
.plane_res_l
[i
] =
4156 (val
>> PLANE_WM_LINES_SHIFT
) &
4157 PLANE_WM_LINES_MASK
;
4159 active
->trans_wm
.plane_en
[PLANE_CURSOR
] = is_enabled
;
4160 active
->trans_wm
.plane_res_b
[PLANE_CURSOR
] =
4161 val
& PLANE_WM_BLOCKS_MASK
;
4162 active
->trans_wm
.plane_res_l
[PLANE_CURSOR
] =
4163 (val
>> PLANE_WM_LINES_SHIFT
) &
4164 PLANE_WM_LINES_MASK
;
4169 static void skl_pipe_wm_get_hw_state(struct drm_crtc
*crtc
)
4171 struct drm_device
*dev
= crtc
->dev
;
4172 struct drm_i915_private
*dev_priv
= to_i915(dev
);
4173 struct skl_wm_values
*hw
= &dev_priv
->wm
.skl_hw
;
4174 struct intel_crtc
*intel_crtc
= to_intel_crtc(crtc
);
4175 struct intel_crtc_state
*cstate
= to_intel_crtc_state(crtc
->state
);
4176 struct skl_pipe_wm
*active
= &cstate
->wm
.skl
.optimal
;
4177 enum pipe pipe
= intel_crtc
->pipe
;
4178 int level
, i
, max_level
;
4181 max_level
= ilk_wm_max_level(dev
);
4183 hw
->wm_linetime
[pipe
] = I915_READ(PIPE_WM_LINETIME(pipe
));
4185 for (level
= 0; level
<= max_level
; level
++) {
4186 for (i
= 0; i
< intel_num_planes(intel_crtc
); i
++)
4187 hw
->plane
[pipe
][i
][level
] =
4188 I915_READ(PLANE_WM(pipe
, i
, level
));
4189 hw
->plane
[pipe
][PLANE_CURSOR
][level
] = I915_READ(CUR_WM(pipe
, level
));
4192 for (i
= 0; i
< intel_num_planes(intel_crtc
); i
++)
4193 hw
->plane_trans
[pipe
][i
] = I915_READ(PLANE_WM_TRANS(pipe
, i
));
4194 hw
->plane_trans
[pipe
][PLANE_CURSOR
] = I915_READ(CUR_WM_TRANS(pipe
));
4196 if (!intel_crtc
->active
)
4199 hw
->dirty_pipes
|= drm_crtc_mask(crtc
);
4201 active
->linetime
= hw
->wm_linetime
[pipe
];
4203 for (level
= 0; level
<= max_level
; level
++) {
4204 for (i
= 0; i
< intel_num_planes(intel_crtc
); i
++) {
4205 temp
= hw
->plane
[pipe
][i
][level
];
4206 skl_pipe_wm_active_state(temp
, active
, false,
4209 temp
= hw
->plane
[pipe
][PLANE_CURSOR
][level
];
4210 skl_pipe_wm_active_state(temp
, active
, false, true, i
, level
);
4213 for (i
= 0; i
< intel_num_planes(intel_crtc
); i
++) {
4214 temp
= hw
->plane_trans
[pipe
][i
];
4215 skl_pipe_wm_active_state(temp
, active
, true, false, i
, 0);
4218 temp
= hw
->plane_trans
[pipe
][PLANE_CURSOR
];
4219 skl_pipe_wm_active_state(temp
, active
, true, true, i
, 0);
4221 intel_crtc
->wm
.active
.skl
= *active
;
4224 void skl_wm_get_hw_state(struct drm_device
*dev
)
4226 struct drm_i915_private
*dev_priv
= to_i915(dev
);
4227 struct skl_ddb_allocation
*ddb
= &dev_priv
->wm
.skl_hw
.ddb
;
4228 struct drm_crtc
*crtc
;
4230 skl_ddb_get_hw_state(dev_priv
, ddb
);
4231 list_for_each_entry(crtc
, &dev
->mode_config
.crtc_list
, head
)
4232 skl_pipe_wm_get_hw_state(crtc
);
4234 if (dev_priv
->active_crtcs
) {
4235 /* Fully recompute DDB on first atomic commit */
4236 dev_priv
->wm
.distrust_bios_wm
= true;
4238 /* Easy/common case; just sanitize DDB now if everything off */
4239 memset(ddb
, 0, sizeof(*ddb
));
4243 static void ilk_pipe_wm_get_hw_state(struct drm_crtc
*crtc
)
4245 struct drm_device
*dev
= crtc
->dev
;
4246 struct drm_i915_private
*dev_priv
= to_i915(dev
);
4247 struct ilk_wm_values
*hw
= &dev_priv
->wm
.hw
;
4248 struct intel_crtc
*intel_crtc
= to_intel_crtc(crtc
);
4249 struct intel_crtc_state
*cstate
= to_intel_crtc_state(crtc
->state
);
4250 struct intel_pipe_wm
*active
= &cstate
->wm
.ilk
.optimal
;
4251 enum pipe pipe
= intel_crtc
->pipe
;
4252 static const i915_reg_t wm0_pipe_reg
[] = {
4253 [PIPE_A
] = WM0_PIPEA_ILK
,
4254 [PIPE_B
] = WM0_PIPEB_ILK
,
4255 [PIPE_C
] = WM0_PIPEC_IVB
,
4258 hw
->wm_pipe
[pipe
] = I915_READ(wm0_pipe_reg
[pipe
]);
4259 if (IS_HASWELL(dev
) || IS_BROADWELL(dev
))
4260 hw
->wm_linetime
[pipe
] = I915_READ(PIPE_WM_LINETIME(pipe
));
4262 memset(active
, 0, sizeof(*active
));
4264 active
->pipe_enabled
= intel_crtc
->active
;
4266 if (active
->pipe_enabled
) {
4267 u32 tmp
= hw
->wm_pipe
[pipe
];
4270 * For active pipes LP0 watermark is marked as
4271 * enabled, and LP1+ watermaks as disabled since
4272 * we can't really reverse compute them in case
4273 * multiple pipes are active.
4275 active
->wm
[0].enable
= true;
4276 active
->wm
[0].pri_val
= (tmp
& WM0_PIPE_PLANE_MASK
) >> WM0_PIPE_PLANE_SHIFT
;
4277 active
->wm
[0].spr_val
= (tmp
& WM0_PIPE_SPRITE_MASK
) >> WM0_PIPE_SPRITE_SHIFT
;
4278 active
->wm
[0].cur_val
= tmp
& WM0_PIPE_CURSOR_MASK
;
4279 active
->linetime
= hw
->wm_linetime
[pipe
];
4281 int level
, max_level
= ilk_wm_max_level(dev
);
4284 * For inactive pipes, all watermark levels
4285 * should be marked as enabled but zeroed,
4286 * which is what we'd compute them to.
4288 for (level
= 0; level
<= max_level
; level
++)
4289 active
->wm
[level
].enable
= true;
4292 intel_crtc
->wm
.active
.ilk
= *active
;
4295 #define _FW_WM(value, plane) \
4296 (((value) & DSPFW_ ## plane ## _MASK) >> DSPFW_ ## plane ## _SHIFT)
4297 #define _FW_WM_VLV(value, plane) \
4298 (((value) & DSPFW_ ## plane ## _MASK_VLV) >> DSPFW_ ## plane ## _SHIFT)
4300 static void vlv_read_wm_values(struct drm_i915_private
*dev_priv
,
4301 struct vlv_wm_values
*wm
)
4306 for_each_pipe(dev_priv
, pipe
) {
4307 tmp
= I915_READ(VLV_DDL(pipe
));
4309 wm
->ddl
[pipe
].primary
=
4310 (tmp
>> DDL_PLANE_SHIFT
) & (DDL_PRECISION_HIGH
| DRAIN_LATENCY_MASK
);
4311 wm
->ddl
[pipe
].cursor
=
4312 (tmp
>> DDL_CURSOR_SHIFT
) & (DDL_PRECISION_HIGH
| DRAIN_LATENCY_MASK
);
4313 wm
->ddl
[pipe
].sprite
[0] =
4314 (tmp
>> DDL_SPRITE_SHIFT(0)) & (DDL_PRECISION_HIGH
| DRAIN_LATENCY_MASK
);
4315 wm
->ddl
[pipe
].sprite
[1] =
4316 (tmp
>> DDL_SPRITE_SHIFT(1)) & (DDL_PRECISION_HIGH
| DRAIN_LATENCY_MASK
);
4319 tmp
= I915_READ(DSPFW1
);
4320 wm
->sr
.plane
= _FW_WM(tmp
, SR
);
4321 wm
->pipe
[PIPE_B
].cursor
= _FW_WM(tmp
, CURSORB
);
4322 wm
->pipe
[PIPE_B
].primary
= _FW_WM_VLV(tmp
, PLANEB
);
4323 wm
->pipe
[PIPE_A
].primary
= _FW_WM_VLV(tmp
, PLANEA
);
4325 tmp
= I915_READ(DSPFW2
);
4326 wm
->pipe
[PIPE_A
].sprite
[1] = _FW_WM_VLV(tmp
, SPRITEB
);
4327 wm
->pipe
[PIPE_A
].cursor
= _FW_WM(tmp
, CURSORA
);
4328 wm
->pipe
[PIPE_A
].sprite
[0] = _FW_WM_VLV(tmp
, SPRITEA
);
4330 tmp
= I915_READ(DSPFW3
);
4331 wm
->sr
.cursor
= _FW_WM(tmp
, CURSOR_SR
);
4333 if (IS_CHERRYVIEW(dev_priv
)) {
4334 tmp
= I915_READ(DSPFW7_CHV
);
4335 wm
->pipe
[PIPE_B
].sprite
[1] = _FW_WM_VLV(tmp
, SPRITED
);
4336 wm
->pipe
[PIPE_B
].sprite
[0] = _FW_WM_VLV(tmp
, SPRITEC
);
4338 tmp
= I915_READ(DSPFW8_CHV
);
4339 wm
->pipe
[PIPE_C
].sprite
[1] = _FW_WM_VLV(tmp
, SPRITEF
);
4340 wm
->pipe
[PIPE_C
].sprite
[0] = _FW_WM_VLV(tmp
, SPRITEE
);
4342 tmp
= I915_READ(DSPFW9_CHV
);
4343 wm
->pipe
[PIPE_C
].primary
= _FW_WM_VLV(tmp
, PLANEC
);
4344 wm
->pipe
[PIPE_C
].cursor
= _FW_WM(tmp
, CURSORC
);
4346 tmp
= I915_READ(DSPHOWM
);
4347 wm
->sr
.plane
|= _FW_WM(tmp
, SR_HI
) << 9;
4348 wm
->pipe
[PIPE_C
].sprite
[1] |= _FW_WM(tmp
, SPRITEF_HI
) << 8;
4349 wm
->pipe
[PIPE_C
].sprite
[0] |= _FW_WM(tmp
, SPRITEE_HI
) << 8;
4350 wm
->pipe
[PIPE_C
].primary
|= _FW_WM(tmp
, PLANEC_HI
) << 8;
4351 wm
->pipe
[PIPE_B
].sprite
[1] |= _FW_WM(tmp
, SPRITED_HI
) << 8;
4352 wm
->pipe
[PIPE_B
].sprite
[0] |= _FW_WM(tmp
, SPRITEC_HI
) << 8;
4353 wm
->pipe
[PIPE_B
].primary
|= _FW_WM(tmp
, PLANEB_HI
) << 8;
4354 wm
->pipe
[PIPE_A
].sprite
[1] |= _FW_WM(tmp
, SPRITEB_HI
) << 8;
4355 wm
->pipe
[PIPE_A
].sprite
[0] |= _FW_WM(tmp
, SPRITEA_HI
) << 8;
4356 wm
->pipe
[PIPE_A
].primary
|= _FW_WM(tmp
, PLANEA_HI
) << 8;
4358 tmp
= I915_READ(DSPFW7
);
4359 wm
->pipe
[PIPE_B
].sprite
[1] = _FW_WM_VLV(tmp
, SPRITED
);
4360 wm
->pipe
[PIPE_B
].sprite
[0] = _FW_WM_VLV(tmp
, SPRITEC
);
4362 tmp
= I915_READ(DSPHOWM
);
4363 wm
->sr
.plane
|= _FW_WM(tmp
, SR_HI
) << 9;
4364 wm
->pipe
[PIPE_B
].sprite
[1] |= _FW_WM(tmp
, SPRITED_HI
) << 8;
4365 wm
->pipe
[PIPE_B
].sprite
[0] |= _FW_WM(tmp
, SPRITEC_HI
) << 8;
4366 wm
->pipe
[PIPE_B
].primary
|= _FW_WM(tmp
, PLANEB_HI
) << 8;
4367 wm
->pipe
[PIPE_A
].sprite
[1] |= _FW_WM(tmp
, SPRITEB_HI
) << 8;
4368 wm
->pipe
[PIPE_A
].sprite
[0] |= _FW_WM(tmp
, SPRITEA_HI
) << 8;
4369 wm
->pipe
[PIPE_A
].primary
|= _FW_WM(tmp
, PLANEA_HI
) << 8;
4376 void vlv_wm_get_hw_state(struct drm_device
*dev
)
4378 struct drm_i915_private
*dev_priv
= to_i915(dev
);
4379 struct vlv_wm_values
*wm
= &dev_priv
->wm
.vlv
;
4380 struct intel_plane
*plane
;
4384 vlv_read_wm_values(dev_priv
, wm
);
4386 for_each_intel_plane(dev
, plane
) {
4387 switch (plane
->base
.type
) {
4389 case DRM_PLANE_TYPE_CURSOR
:
4390 plane
->wm
.fifo_size
= 63;
4392 case DRM_PLANE_TYPE_PRIMARY
:
4393 plane
->wm
.fifo_size
= vlv_get_fifo_size(dev
, plane
->pipe
, 0);
4395 case DRM_PLANE_TYPE_OVERLAY
:
4396 sprite
= plane
->plane
;
4397 plane
->wm
.fifo_size
= vlv_get_fifo_size(dev
, plane
->pipe
, sprite
+ 1);
4402 wm
->cxsr
= I915_READ(FW_BLC_SELF_VLV
) & FW_CSPWRDWNEN
;
4403 wm
->level
= VLV_WM_LEVEL_PM2
;
4405 if (IS_CHERRYVIEW(dev_priv
)) {
4406 mutex_lock(&dev_priv
->rps
.hw_lock
);
4408 val
= vlv_punit_read(dev_priv
, PUNIT_REG_DSPFREQ
);
4409 if (val
& DSP_MAXFIFO_PM5_ENABLE
)
4410 wm
->level
= VLV_WM_LEVEL_PM5
;
4413 * If DDR DVFS is disabled in the BIOS, Punit
4414 * will never ack the request. So if that happens
4415 * assume we don't have to enable/disable DDR DVFS
4416 * dynamically. To test that just set the REQ_ACK
4417 * bit to poke the Punit, but don't change the
4418 * HIGH/LOW bits so that we don't actually change
4419 * the current state.
4421 val
= vlv_punit_read(dev_priv
, PUNIT_REG_DDR_SETUP2
);
4422 val
|= FORCE_DDR_FREQ_REQ_ACK
;
4423 vlv_punit_write(dev_priv
, PUNIT_REG_DDR_SETUP2
, val
);
4425 if (wait_for((vlv_punit_read(dev_priv
, PUNIT_REG_DDR_SETUP2
) &
4426 FORCE_DDR_FREQ_REQ_ACK
) == 0, 3)) {
4427 DRM_DEBUG_KMS("Punit not acking DDR DVFS request, "
4428 "assuming DDR DVFS is disabled\n");
4429 dev_priv
->wm
.max_level
= VLV_WM_LEVEL_PM5
;
4431 val
= vlv_punit_read(dev_priv
, PUNIT_REG_DDR_SETUP2
);
4432 if ((val
& FORCE_DDR_HIGH_FREQ
) == 0)
4433 wm
->level
= VLV_WM_LEVEL_DDR_DVFS
;
4436 mutex_unlock(&dev_priv
->rps
.hw_lock
);
4439 for_each_pipe(dev_priv
, pipe
)
4440 DRM_DEBUG_KMS("Initial watermarks: pipe %c, plane=%d, cursor=%d, sprite0=%d, sprite1=%d\n",
4441 pipe_name(pipe
), wm
->pipe
[pipe
].primary
, wm
->pipe
[pipe
].cursor
,
4442 wm
->pipe
[pipe
].sprite
[0], wm
->pipe
[pipe
].sprite
[1]);
4444 DRM_DEBUG_KMS("Initial watermarks: SR plane=%d, SR cursor=%d level=%d cxsr=%d\n",
4445 wm
->sr
.plane
, wm
->sr
.cursor
, wm
->level
, wm
->cxsr
);
4448 void ilk_wm_get_hw_state(struct drm_device
*dev
)
4450 struct drm_i915_private
*dev_priv
= to_i915(dev
);
4451 struct ilk_wm_values
*hw
= &dev_priv
->wm
.hw
;
4452 struct drm_crtc
*crtc
;
4454 for_each_crtc(dev
, crtc
)
4455 ilk_pipe_wm_get_hw_state(crtc
);
4457 hw
->wm_lp
[0] = I915_READ(WM1_LP_ILK
);
4458 hw
->wm_lp
[1] = I915_READ(WM2_LP_ILK
);
4459 hw
->wm_lp
[2] = I915_READ(WM3_LP_ILK
);
4461 hw
->wm_lp_spr
[0] = I915_READ(WM1S_LP_ILK
);
4462 if (INTEL_INFO(dev
)->gen
>= 7) {
4463 hw
->wm_lp_spr
[1] = I915_READ(WM2S_LP_IVB
);
4464 hw
->wm_lp_spr
[2] = I915_READ(WM3S_LP_IVB
);
4467 if (IS_HASWELL(dev
) || IS_BROADWELL(dev
))
4468 hw
->partitioning
= (I915_READ(WM_MISC
) & WM_MISC_DATA_PARTITION_5_6
) ?
4469 INTEL_DDB_PART_5_6
: INTEL_DDB_PART_1_2
;
4470 else if (IS_IVYBRIDGE(dev
))
4471 hw
->partitioning
= (I915_READ(DISP_ARB_CTL2
) & DISP_DATA_PARTITION_5_6
) ?
4472 INTEL_DDB_PART_5_6
: INTEL_DDB_PART_1_2
;
4475 !(I915_READ(DISP_ARB_CTL
) & DISP_FBC_WM_DIS
);
4479 * intel_update_watermarks - update FIFO watermark values based on current modes
4481 * Calculate watermark values for the various WM regs based on current mode
4482 * and plane configuration.
4484 * There are several cases to deal with here:
4485 * - normal (i.e. non-self-refresh)
4486 * - self-refresh (SR) mode
4487 * - lines are large relative to FIFO size (buffer can hold up to 2)
4488 * - lines are small relative to FIFO size (buffer can hold more than 2
4489 * lines), so need to account for TLB latency
4491 * The normal calculation is:
4492 * watermark = dotclock * bytes per pixel * latency
4493 * where latency is platform & configuration dependent (we assume pessimal
4496 * The SR calculation is:
4497 * watermark = (trunc(latency/line time)+1) * surface width *
4500 * line time = htotal / dotclock
4501 * surface width = hdisplay for normal plane and 64 for cursor
4502 * and latency is assumed to be high, as above.
4504 * The final value programmed to the register should always be rounded up,
4505 * and include an extra 2 entries to account for clock crossings.
4507 * We don't use the sprite, so we can ignore that. And on Crestline we have
4508 * to set the non-SR watermarks to 8.
4510 void intel_update_watermarks(struct drm_crtc
*crtc
)
4512 struct drm_i915_private
*dev_priv
= to_i915(crtc
->dev
);
4514 if (dev_priv
->display
.update_wm
)
4515 dev_priv
->display
.update_wm(crtc
);
4519 * Lock protecting IPS related data structures
4521 DEFINE_SPINLOCK(mchdev_lock
);
4523 /* Global for IPS driver to get at the current i915 device. Protected by
4525 static struct drm_i915_private
*i915_mch_dev
;
4527 bool ironlake_set_drps(struct drm_i915_private
*dev_priv
, u8 val
)
4531 assert_spin_locked(&mchdev_lock
);
4533 rgvswctl
= I915_READ16(MEMSWCTL
);
4534 if (rgvswctl
& MEMCTL_CMD_STS
) {
4535 DRM_DEBUG("gpu busy, RCS change rejected\n");
4536 return false; /* still busy with another command */
4539 rgvswctl
= (MEMCTL_CMD_CHFREQ
<< MEMCTL_CMD_SHIFT
) |
4540 (val
<< MEMCTL_FREQ_SHIFT
) | MEMCTL_SFCAVM
;
4541 I915_WRITE16(MEMSWCTL
, rgvswctl
);
4542 POSTING_READ16(MEMSWCTL
);
4544 rgvswctl
|= MEMCTL_CMD_STS
;
4545 I915_WRITE16(MEMSWCTL
, rgvswctl
);
4550 static void ironlake_enable_drps(struct drm_i915_private
*dev_priv
)
4553 u8 fmax
, fmin
, fstart
, vstart
;
4555 spin_lock_irq(&mchdev_lock
);
4557 rgvmodectl
= I915_READ(MEMMODECTL
);
4559 /* Enable temp reporting */
4560 I915_WRITE16(PMMISC
, I915_READ(PMMISC
) | MCPPCE_EN
);
4561 I915_WRITE16(TSC1
, I915_READ(TSC1
) | TSE
);
4563 /* 100ms RC evaluation intervals */
4564 I915_WRITE(RCUPEI
, 100000);
4565 I915_WRITE(RCDNEI
, 100000);
4567 /* Set max/min thresholds to 90ms and 80ms respectively */
4568 I915_WRITE(RCBMAXAVG
, 90000);
4569 I915_WRITE(RCBMINAVG
, 80000);
4571 I915_WRITE(MEMIHYST
, 1);
4573 /* Set up min, max, and cur for interrupt handling */
4574 fmax
= (rgvmodectl
& MEMMODE_FMAX_MASK
) >> MEMMODE_FMAX_SHIFT
;
4575 fmin
= (rgvmodectl
& MEMMODE_FMIN_MASK
);
4576 fstart
= (rgvmodectl
& MEMMODE_FSTART_MASK
) >>
4577 MEMMODE_FSTART_SHIFT
;
4579 vstart
= (I915_READ(PXVFREQ(fstart
)) & PXVFREQ_PX_MASK
) >>
4582 dev_priv
->ips
.fmax
= fmax
; /* IPS callback will increase this */
4583 dev_priv
->ips
.fstart
= fstart
;
4585 dev_priv
->ips
.max_delay
= fstart
;
4586 dev_priv
->ips
.min_delay
= fmin
;
4587 dev_priv
->ips
.cur_delay
= fstart
;
4589 DRM_DEBUG_DRIVER("fmax: %d, fmin: %d, fstart: %d\n",
4590 fmax
, fmin
, fstart
);
4592 I915_WRITE(MEMINTREN
, MEMINT_CX_SUPR_EN
| MEMINT_EVAL_CHG_EN
);
4595 * Interrupts will be enabled in ironlake_irq_postinstall
4598 I915_WRITE(VIDSTART
, vstart
);
4599 POSTING_READ(VIDSTART
);
4601 rgvmodectl
|= MEMMODE_SWMODE_EN
;
4602 I915_WRITE(MEMMODECTL
, rgvmodectl
);
4604 if (wait_for_atomic((I915_READ(MEMSWCTL
) & MEMCTL_CMD_STS
) == 0, 10))
4605 DRM_ERROR("stuck trying to change perf mode\n");
4608 ironlake_set_drps(dev_priv
, fstart
);
4610 dev_priv
->ips
.last_count1
= I915_READ(DMIEC
) +
4611 I915_READ(DDREC
) + I915_READ(CSIEC
);
4612 dev_priv
->ips
.last_time1
= jiffies_to_msecs(jiffies
);
4613 dev_priv
->ips
.last_count2
= I915_READ(GFXEC
);
4614 dev_priv
->ips
.last_time2
= ktime_get_raw_ns();
4616 spin_unlock_irq(&mchdev_lock
);
4619 static void ironlake_disable_drps(struct drm_i915_private
*dev_priv
)
4623 spin_lock_irq(&mchdev_lock
);
4625 rgvswctl
= I915_READ16(MEMSWCTL
);
4627 /* Ack interrupts, disable EFC interrupt */
4628 I915_WRITE(MEMINTREN
, I915_READ(MEMINTREN
) & ~MEMINT_EVAL_CHG_EN
);
4629 I915_WRITE(MEMINTRSTS
, MEMINT_EVAL_CHG
);
4630 I915_WRITE(DEIER
, I915_READ(DEIER
) & ~DE_PCU_EVENT
);
4631 I915_WRITE(DEIIR
, DE_PCU_EVENT
);
4632 I915_WRITE(DEIMR
, I915_READ(DEIMR
) | DE_PCU_EVENT
);
4634 /* Go back to the starting frequency */
4635 ironlake_set_drps(dev_priv
, dev_priv
->ips
.fstart
);
4637 rgvswctl
|= MEMCTL_CMD_STS
;
4638 I915_WRITE(MEMSWCTL
, rgvswctl
);
4641 spin_unlock_irq(&mchdev_lock
);
4644 /* There's a funny hw issue where the hw returns all 0 when reading from
4645 * GEN6_RP_INTERRUPT_LIMITS. Hence we always need to compute the desired value
4646 * ourselves, instead of doing a rmw cycle (which might result in us clearing
4647 * all limits and the gpu stuck at whatever frequency it is at atm).
4649 static u32
intel_rps_limits(struct drm_i915_private
*dev_priv
, u8 val
)
4653 /* Only set the down limit when we've reached the lowest level to avoid
4654 * getting more interrupts, otherwise leave this clear. This prevents a
4655 * race in the hw when coming out of rc6: There's a tiny window where
4656 * the hw runs at the minimal clock before selecting the desired
4657 * frequency, if the down threshold expires in that window we will not
4658 * receive a down interrupt. */
4659 if (IS_GEN9(dev_priv
)) {
4660 limits
= (dev_priv
->rps
.max_freq_softlimit
) << 23;
4661 if (val
<= dev_priv
->rps
.min_freq_softlimit
)
4662 limits
|= (dev_priv
->rps
.min_freq_softlimit
) << 14;
4664 limits
= dev_priv
->rps
.max_freq_softlimit
<< 24;
4665 if (val
<= dev_priv
->rps
.min_freq_softlimit
)
4666 limits
|= dev_priv
->rps
.min_freq_softlimit
<< 16;
4672 static void gen6_set_rps_thresholds(struct drm_i915_private
*dev_priv
, u8 val
)
4675 u32 threshold_up
= 0, threshold_down
= 0; /* in % */
4676 u32 ei_up
= 0, ei_down
= 0;
4678 new_power
= dev_priv
->rps
.power
;
4679 switch (dev_priv
->rps
.power
) {
4681 if (val
> dev_priv
->rps
.efficient_freq
+ 1 &&
4682 val
> dev_priv
->rps
.cur_freq
)
4683 new_power
= BETWEEN
;
4687 if (val
<= dev_priv
->rps
.efficient_freq
&&
4688 val
< dev_priv
->rps
.cur_freq
)
4689 new_power
= LOW_POWER
;
4690 else if (val
>= dev_priv
->rps
.rp0_freq
&&
4691 val
> dev_priv
->rps
.cur_freq
)
4692 new_power
= HIGH_POWER
;
4696 if (val
< (dev_priv
->rps
.rp1_freq
+ dev_priv
->rps
.rp0_freq
) >> 1 &&
4697 val
< dev_priv
->rps
.cur_freq
)
4698 new_power
= BETWEEN
;
4701 /* Max/min bins are special */
4702 if (val
<= dev_priv
->rps
.min_freq_softlimit
)
4703 new_power
= LOW_POWER
;
4704 if (val
>= dev_priv
->rps
.max_freq_softlimit
)
4705 new_power
= HIGH_POWER
;
4706 if (new_power
== dev_priv
->rps
.power
)
4709 /* Note the units here are not exactly 1us, but 1280ns. */
4710 switch (new_power
) {
4712 /* Upclock if more than 95% busy over 16ms */
4716 /* Downclock if less than 85% busy over 32ms */
4718 threshold_down
= 85;
4722 /* Upclock if more than 90% busy over 13ms */
4726 /* Downclock if less than 75% busy over 32ms */
4728 threshold_down
= 75;
4732 /* Upclock if more than 85% busy over 10ms */
4736 /* Downclock if less than 60% busy over 32ms */
4738 threshold_down
= 60;
4742 I915_WRITE(GEN6_RP_UP_EI
,
4743 GT_INTERVAL_FROM_US(dev_priv
, ei_up
));
4744 I915_WRITE(GEN6_RP_UP_THRESHOLD
,
4745 GT_INTERVAL_FROM_US(dev_priv
,
4746 ei_up
* threshold_up
/ 100));
4748 I915_WRITE(GEN6_RP_DOWN_EI
,
4749 GT_INTERVAL_FROM_US(dev_priv
, ei_down
));
4750 I915_WRITE(GEN6_RP_DOWN_THRESHOLD
,
4751 GT_INTERVAL_FROM_US(dev_priv
,
4752 ei_down
* threshold_down
/ 100));
4754 I915_WRITE(GEN6_RP_CONTROL
,
4755 GEN6_RP_MEDIA_TURBO
|
4756 GEN6_RP_MEDIA_HW_NORMAL_MODE
|
4757 GEN6_RP_MEDIA_IS_GFX
|
4759 GEN6_RP_UP_BUSY_AVG
|
4760 GEN6_RP_DOWN_IDLE_AVG
);
4762 dev_priv
->rps
.power
= new_power
;
4763 dev_priv
->rps
.up_threshold
= threshold_up
;
4764 dev_priv
->rps
.down_threshold
= threshold_down
;
4765 dev_priv
->rps
.last_adj
= 0;
4768 static u32
gen6_rps_pm_mask(struct drm_i915_private
*dev_priv
, u8 val
)
4772 if (val
> dev_priv
->rps
.min_freq_softlimit
)
4773 mask
|= GEN6_PM_RP_DOWN_EI_EXPIRED
| GEN6_PM_RP_DOWN_THRESHOLD
| GEN6_PM_RP_DOWN_TIMEOUT
;
4774 if (val
< dev_priv
->rps
.max_freq_softlimit
)
4775 mask
|= GEN6_PM_RP_UP_EI_EXPIRED
| GEN6_PM_RP_UP_THRESHOLD
;
4777 mask
&= dev_priv
->pm_rps_events
;
4779 return gen6_sanitize_rps_pm_mask(dev_priv
, ~mask
);
4782 /* gen6_set_rps is called to update the frequency request, but should also be
4783 * called when the range (min_delay and max_delay) is modified so that we can
4784 * update the GEN6_RP_INTERRUPT_LIMITS register accordingly. */
4785 static void gen6_set_rps(struct drm_i915_private
*dev_priv
, u8 val
)
4787 /* WaGsvDisableTurbo: Workaround to disable turbo on BXT A* */
4788 if (IS_BXT_REVID(dev_priv
, 0, BXT_REVID_A1
))
4791 WARN_ON(!mutex_is_locked(&dev_priv
->rps
.hw_lock
));
4792 WARN_ON(val
> dev_priv
->rps
.max_freq
);
4793 WARN_ON(val
< dev_priv
->rps
.min_freq
);
4795 /* min/max delay may still have been modified so be sure to
4796 * write the limits value.
4798 if (val
!= dev_priv
->rps
.cur_freq
) {
4799 gen6_set_rps_thresholds(dev_priv
, val
);
4801 if (IS_GEN9(dev_priv
))
4802 I915_WRITE(GEN6_RPNSWREQ
,
4803 GEN9_FREQUENCY(val
));
4804 else if (IS_HASWELL(dev_priv
) || IS_BROADWELL(dev_priv
))
4805 I915_WRITE(GEN6_RPNSWREQ
,
4806 HSW_FREQUENCY(val
));
4808 I915_WRITE(GEN6_RPNSWREQ
,
4809 GEN6_FREQUENCY(val
) |
4811 GEN6_AGGRESSIVE_TURBO
);
4814 /* Make sure we continue to get interrupts
4815 * until we hit the minimum or maximum frequencies.
4817 I915_WRITE(GEN6_RP_INTERRUPT_LIMITS
, intel_rps_limits(dev_priv
, val
));
4818 I915_WRITE(GEN6_PMINTRMSK
, gen6_rps_pm_mask(dev_priv
, val
));
4820 POSTING_READ(GEN6_RPNSWREQ
);
4822 dev_priv
->rps
.cur_freq
= val
;
4823 trace_intel_gpu_freq_change(intel_gpu_freq(dev_priv
, val
));
4826 static void valleyview_set_rps(struct drm_i915_private
*dev_priv
, u8 val
)
4828 WARN_ON(!mutex_is_locked(&dev_priv
->rps
.hw_lock
));
4829 WARN_ON(val
> dev_priv
->rps
.max_freq
);
4830 WARN_ON(val
< dev_priv
->rps
.min_freq
);
4832 if (WARN_ONCE(IS_CHERRYVIEW(dev_priv
) && (val
& 1),
4833 "Odd GPU freq value\n"))
4836 I915_WRITE(GEN6_PMINTRMSK
, gen6_rps_pm_mask(dev_priv
, val
));
4838 if (val
!= dev_priv
->rps
.cur_freq
) {
4839 vlv_punit_write(dev_priv
, PUNIT_REG_GPU_FREQ_REQ
, val
);
4840 if (!IS_CHERRYVIEW(dev_priv
))
4841 gen6_set_rps_thresholds(dev_priv
, val
);
4844 dev_priv
->rps
.cur_freq
= val
;
4845 trace_intel_gpu_freq_change(intel_gpu_freq(dev_priv
, val
));
4848 /* vlv_set_rps_idle: Set the frequency to idle, if Gfx clocks are down
4850 * * If Gfx is Idle, then
4851 * 1. Forcewake Media well.
4852 * 2. Request idle freq.
4853 * 3. Release Forcewake of Media well.
4855 static void vlv_set_rps_idle(struct drm_i915_private
*dev_priv
)
4857 u32 val
= dev_priv
->rps
.idle_freq
;
4859 if (dev_priv
->rps
.cur_freq
<= val
)
4862 /* Wake up the media well, as that takes a lot less
4863 * power than the Render well. */
4864 intel_uncore_forcewake_get(dev_priv
, FORCEWAKE_MEDIA
);
4865 valleyview_set_rps(dev_priv
, val
);
4866 intel_uncore_forcewake_put(dev_priv
, FORCEWAKE_MEDIA
);
4869 void gen6_rps_busy(struct drm_i915_private
*dev_priv
)
4871 mutex_lock(&dev_priv
->rps
.hw_lock
);
4872 if (dev_priv
->rps
.enabled
) {
4873 if (dev_priv
->pm_rps_events
& (GEN6_PM_RP_DOWN_EI_EXPIRED
| GEN6_PM_RP_UP_EI_EXPIRED
))
4874 gen6_rps_reset_ei(dev_priv
);
4875 I915_WRITE(GEN6_PMINTRMSK
,
4876 gen6_rps_pm_mask(dev_priv
, dev_priv
->rps
.cur_freq
));
4878 gen6_enable_rps_interrupts(dev_priv
);
4880 /* Ensure we start at the user's desired frequency */
4881 intel_set_rps(dev_priv
,
4882 clamp(dev_priv
->rps
.cur_freq
,
4883 dev_priv
->rps
.min_freq_softlimit
,
4884 dev_priv
->rps
.max_freq_softlimit
));
4886 mutex_unlock(&dev_priv
->rps
.hw_lock
);
4889 void gen6_rps_idle(struct drm_i915_private
*dev_priv
)
4891 /* Flush our bottom-half so that it does not race with us
4892 * setting the idle frequency and so that it is bounded by
4893 * our rpm wakeref. And then disable the interrupts to stop any
4894 * futher RPS reclocking whilst we are asleep.
4896 gen6_disable_rps_interrupts(dev_priv
);
4898 mutex_lock(&dev_priv
->rps
.hw_lock
);
4899 if (dev_priv
->rps
.enabled
) {
4900 if (IS_VALLEYVIEW(dev_priv
) || IS_CHERRYVIEW(dev_priv
))
4901 vlv_set_rps_idle(dev_priv
);
4903 gen6_set_rps(dev_priv
, dev_priv
->rps
.idle_freq
);
4904 dev_priv
->rps
.last_adj
= 0;
4905 I915_WRITE(GEN6_PMINTRMSK
,
4906 gen6_sanitize_rps_pm_mask(dev_priv
, ~0));
4908 mutex_unlock(&dev_priv
->rps
.hw_lock
);
4910 spin_lock(&dev_priv
->rps
.client_lock
);
4911 while (!list_empty(&dev_priv
->rps
.clients
))
4912 list_del_init(dev_priv
->rps
.clients
.next
);
4913 spin_unlock(&dev_priv
->rps
.client_lock
);
4916 void gen6_rps_boost(struct drm_i915_private
*dev_priv
,
4917 struct intel_rps_client
*rps
,
4918 unsigned long submitted
)
4920 /* This is intentionally racy! We peek at the state here, then
4921 * validate inside the RPS worker.
4923 if (!(dev_priv
->gt
.awake
&&
4924 dev_priv
->rps
.enabled
&&
4925 dev_priv
->rps
.cur_freq
< dev_priv
->rps
.boost_freq
))
4928 /* Force a RPS boost (and don't count it against the client) if
4929 * the GPU is severely congested.
4931 if (rps
&& time_after(jiffies
, submitted
+ DRM_I915_THROTTLE_JIFFIES
))
4934 spin_lock(&dev_priv
->rps
.client_lock
);
4935 if (rps
== NULL
|| list_empty(&rps
->link
)) {
4936 spin_lock_irq(&dev_priv
->irq_lock
);
4937 if (dev_priv
->rps
.interrupts_enabled
) {
4938 dev_priv
->rps
.client_boost
= true;
4939 schedule_work(&dev_priv
->rps
.work
);
4941 spin_unlock_irq(&dev_priv
->irq_lock
);
4944 list_add(&rps
->link
, &dev_priv
->rps
.clients
);
4947 dev_priv
->rps
.boosts
++;
4949 spin_unlock(&dev_priv
->rps
.client_lock
);
4952 void intel_set_rps(struct drm_i915_private
*dev_priv
, u8 val
)
4954 if (IS_VALLEYVIEW(dev_priv
) || IS_CHERRYVIEW(dev_priv
))
4955 valleyview_set_rps(dev_priv
, val
);
4957 gen6_set_rps(dev_priv
, val
);
4960 static void gen9_disable_rc6(struct drm_i915_private
*dev_priv
)
4962 I915_WRITE(GEN6_RC_CONTROL
, 0);
4963 I915_WRITE(GEN9_PG_ENABLE
, 0);
4966 static void gen9_disable_rps(struct drm_i915_private
*dev_priv
)
4968 I915_WRITE(GEN6_RP_CONTROL
, 0);
4971 static void gen6_disable_rps(struct drm_i915_private
*dev_priv
)
4973 I915_WRITE(GEN6_RC_CONTROL
, 0);
4974 I915_WRITE(GEN6_RPNSWREQ
, 1 << 31);
4975 I915_WRITE(GEN6_RP_CONTROL
, 0);
4978 static void cherryview_disable_rps(struct drm_i915_private
*dev_priv
)
4980 I915_WRITE(GEN6_RC_CONTROL
, 0);
4983 static void valleyview_disable_rps(struct drm_i915_private
*dev_priv
)
4985 /* we're doing forcewake before Disabling RC6,
4986 * This what the BIOS expects when going into suspend */
4987 intel_uncore_forcewake_get(dev_priv
, FORCEWAKE_ALL
);
4989 I915_WRITE(GEN6_RC_CONTROL
, 0);
4991 intel_uncore_forcewake_put(dev_priv
, FORCEWAKE_ALL
);
4994 static void intel_print_rc6_info(struct drm_i915_private
*dev_priv
, u32 mode
)
4996 if (IS_VALLEYVIEW(dev_priv
) || IS_CHERRYVIEW(dev_priv
)) {
4997 if (mode
& (GEN7_RC_CTL_TO_MODE
| GEN6_RC_CTL_EI_MODE(1)))
4998 mode
= GEN6_RC_CTL_RC6_ENABLE
;
5002 if (HAS_RC6p(dev_priv
))
5003 DRM_DEBUG_DRIVER("Enabling RC6 states: "
5004 "RC6 %s RC6p %s RC6pp %s\n",
5005 onoff(mode
& GEN6_RC_CTL_RC6_ENABLE
),
5006 onoff(mode
& GEN6_RC_CTL_RC6p_ENABLE
),
5007 onoff(mode
& GEN6_RC_CTL_RC6pp_ENABLE
));
5010 DRM_DEBUG_DRIVER("Enabling RC6 states: RC6 %s\n",
5011 onoff(mode
& GEN6_RC_CTL_RC6_ENABLE
));
5014 static bool bxt_check_bios_rc6_setup(struct drm_i915_private
*dev_priv
)
5016 struct i915_ggtt
*ggtt
= &dev_priv
->ggtt
;
5017 bool enable_rc6
= true;
5018 unsigned long rc6_ctx_base
;
5022 rc_ctl
= I915_READ(GEN6_RC_CONTROL
);
5023 rc_sw_target
= (I915_READ(GEN6_RC_STATE
) & RC_SW_TARGET_STATE_MASK
) >>
5024 RC_SW_TARGET_STATE_SHIFT
;
5025 DRM_DEBUG_DRIVER("BIOS enabled RC states: "
5026 "HW_CTRL %s HW_RC6 %s SW_TARGET_STATE %x\n",
5027 onoff(rc_ctl
& GEN6_RC_CTL_HW_ENABLE
),
5028 onoff(rc_ctl
& GEN6_RC_CTL_RC6_ENABLE
),
5031 if (!(I915_READ(RC6_LOCATION
) & RC6_CTX_IN_DRAM
)) {
5032 DRM_DEBUG_DRIVER("RC6 Base location not set properly.\n");
5037 * The exact context size is not known for BXT, so assume a page size
5040 rc6_ctx_base
= I915_READ(RC6_CTX_BASE
) & RC6_CTX_BASE_MASK
;
5041 if (!((rc6_ctx_base
>= ggtt
->stolen_reserved_base
) &&
5042 (rc6_ctx_base
+ PAGE_SIZE
<= ggtt
->stolen_reserved_base
+
5043 ggtt
->stolen_reserved_size
))) {
5044 DRM_DEBUG_DRIVER("RC6 Base address not as expected.\n");
5048 if (!(((I915_READ(PWRCTX_MAXCNT_RCSUNIT
) & IDLE_TIME_MASK
) > 1) &&
5049 ((I915_READ(PWRCTX_MAXCNT_VCSUNIT0
) & IDLE_TIME_MASK
) > 1) &&
5050 ((I915_READ(PWRCTX_MAXCNT_BCSUNIT
) & IDLE_TIME_MASK
) > 1) &&
5051 ((I915_READ(PWRCTX_MAXCNT_VECSUNIT
) & IDLE_TIME_MASK
) > 1))) {
5052 DRM_DEBUG_DRIVER("Engine Idle wait time not set properly.\n");
5056 if (!I915_READ(GEN8_PUSHBUS_CONTROL
) ||
5057 !I915_READ(GEN8_PUSHBUS_ENABLE
) ||
5058 !I915_READ(GEN8_PUSHBUS_SHIFT
)) {
5059 DRM_DEBUG_DRIVER("Pushbus not setup properly.\n");
5063 if (!I915_READ(GEN6_GFXPAUSE
)) {
5064 DRM_DEBUG_DRIVER("GFX pause not setup properly.\n");
5068 if (!I915_READ(GEN8_MISC_CTRL0
)) {
5069 DRM_DEBUG_DRIVER("GPM control not setup properly.\n");
5076 int sanitize_rc6_option(struct drm_i915_private
*dev_priv
, int enable_rc6
)
5078 /* No RC6 before Ironlake and code is gone for ilk. */
5079 if (INTEL_INFO(dev_priv
)->gen
< 6)
5085 if (IS_BROXTON(dev_priv
) && !bxt_check_bios_rc6_setup(dev_priv
)) {
5086 DRM_INFO("RC6 disabled by BIOS\n");
5090 /* Respect the kernel parameter if it is set */
5091 if (enable_rc6
>= 0) {
5094 if (HAS_RC6p(dev_priv
))
5095 mask
= INTEL_RC6_ENABLE
| INTEL_RC6p_ENABLE
|
5098 mask
= INTEL_RC6_ENABLE
;
5100 if ((enable_rc6
& mask
) != enable_rc6
)
5101 DRM_DEBUG_DRIVER("Adjusting RC6 mask to %d "
5102 "(requested %d, valid %d)\n",
5103 enable_rc6
& mask
, enable_rc6
, mask
);
5105 return enable_rc6
& mask
;
5108 if (IS_IVYBRIDGE(dev_priv
))
5109 return (INTEL_RC6_ENABLE
| INTEL_RC6p_ENABLE
);
5111 return INTEL_RC6_ENABLE
;
5114 static void gen6_init_rps_frequencies(struct drm_i915_private
*dev_priv
)
5116 /* All of these values are in units of 50MHz */
5118 /* static values from HW: RP0 > RP1 > RPn (min_freq) */
5119 if (IS_BROXTON(dev_priv
)) {
5120 u32 rp_state_cap
= I915_READ(BXT_RP_STATE_CAP
);
5121 dev_priv
->rps
.rp0_freq
= (rp_state_cap
>> 16) & 0xff;
5122 dev_priv
->rps
.rp1_freq
= (rp_state_cap
>> 8) & 0xff;
5123 dev_priv
->rps
.min_freq
= (rp_state_cap
>> 0) & 0xff;
5125 u32 rp_state_cap
= I915_READ(GEN6_RP_STATE_CAP
);
5126 dev_priv
->rps
.rp0_freq
= (rp_state_cap
>> 0) & 0xff;
5127 dev_priv
->rps
.rp1_freq
= (rp_state_cap
>> 8) & 0xff;
5128 dev_priv
->rps
.min_freq
= (rp_state_cap
>> 16) & 0xff;
5130 /* hw_max = RP0 until we check for overclocking */
5131 dev_priv
->rps
.max_freq
= dev_priv
->rps
.rp0_freq
;
5133 dev_priv
->rps
.efficient_freq
= dev_priv
->rps
.rp1_freq
;
5134 if (IS_HASWELL(dev_priv
) || IS_BROADWELL(dev_priv
) ||
5135 IS_SKYLAKE(dev_priv
) || IS_KABYLAKE(dev_priv
)) {
5136 u32 ddcc_status
= 0;
5138 if (sandybridge_pcode_read(dev_priv
,
5139 HSW_PCODE_DYNAMIC_DUTY_CYCLE_CONTROL
,
5141 dev_priv
->rps
.efficient_freq
=
5143 ((ddcc_status
>> 8) & 0xff),
5144 dev_priv
->rps
.min_freq
,
5145 dev_priv
->rps
.max_freq
);
5148 if (IS_SKYLAKE(dev_priv
) || IS_KABYLAKE(dev_priv
)) {
5149 /* Store the frequency values in 16.66 MHZ units, which is
5150 * the natural hardware unit for SKL
5152 dev_priv
->rps
.rp0_freq
*= GEN9_FREQ_SCALER
;
5153 dev_priv
->rps
.rp1_freq
*= GEN9_FREQ_SCALER
;
5154 dev_priv
->rps
.min_freq
*= GEN9_FREQ_SCALER
;
5155 dev_priv
->rps
.max_freq
*= GEN9_FREQ_SCALER
;
5156 dev_priv
->rps
.efficient_freq
*= GEN9_FREQ_SCALER
;
5160 static void reset_rps(struct drm_i915_private
*dev_priv
,
5161 void (*set
)(struct drm_i915_private
*, u8
))
5163 u8 freq
= dev_priv
->rps
.cur_freq
;
5166 dev_priv
->rps
.power
= -1;
5167 dev_priv
->rps
.cur_freq
= -1;
5169 set(dev_priv
, freq
);
5172 /* See the Gen9_GT_PM_Programming_Guide doc for the below */
5173 static void gen9_enable_rps(struct drm_i915_private
*dev_priv
)
5175 intel_uncore_forcewake_get(dev_priv
, FORCEWAKE_ALL
);
5177 /* WaGsvDisableTurbo: Workaround to disable turbo on BXT A* */
5178 if (IS_BXT_REVID(dev_priv
, 0, BXT_REVID_A1
)) {
5180 * BIOS could leave the Hw Turbo enabled, so need to explicitly
5181 * clear out the Control register just to avoid inconsitency
5182 * with debugfs interface, which will show Turbo as enabled
5183 * only and that is not expected by the User after adding the
5184 * WaGsvDisableTurbo. Apart from this there is no problem even
5185 * if the Turbo is left enabled in the Control register, as the
5186 * Up/Down interrupts would remain masked.
5188 gen9_disable_rps(dev_priv
);
5189 intel_uncore_forcewake_put(dev_priv
, FORCEWAKE_ALL
);
5193 /* Program defaults and thresholds for RPS*/
5194 I915_WRITE(GEN6_RC_VIDEO_FREQ
,
5195 GEN9_FREQUENCY(dev_priv
->rps
.rp1_freq
));
5197 /* 1 second timeout*/
5198 I915_WRITE(GEN6_RP_DOWN_TIMEOUT
,
5199 GT_INTERVAL_FROM_US(dev_priv
, 1000000));
5201 I915_WRITE(GEN6_RP_IDLE_HYSTERSIS
, 0xa);
5203 /* Leaning on the below call to gen6_set_rps to program/setup the
5204 * Up/Down EI & threshold registers, as well as the RP_CONTROL,
5205 * RP_INTERRUPT_LIMITS & RPNSWREQ registers */
5206 reset_rps(dev_priv
, gen6_set_rps
);
5208 intel_uncore_forcewake_put(dev_priv
, FORCEWAKE_ALL
);
5211 static void gen9_enable_rc6(struct drm_i915_private
*dev_priv
)
5213 struct intel_engine_cs
*engine
;
5214 uint32_t rc6_mask
= 0;
5216 /* 1a: Software RC state - RC0 */
5217 I915_WRITE(GEN6_RC_STATE
, 0);
5219 /* 1b: Get forcewake during program sequence. Although the driver
5220 * hasn't enabled a state yet where we need forcewake, BIOS may have.*/
5221 intel_uncore_forcewake_get(dev_priv
, FORCEWAKE_ALL
);
5223 /* 2a: Disable RC states. */
5224 I915_WRITE(GEN6_RC_CONTROL
, 0);
5226 /* 2b: Program RC6 thresholds.*/
5228 /* WaRsDoubleRc6WrlWithCoarsePowerGating: Doubling WRL only when CPG is enabled */
5229 if (IS_SKYLAKE(dev_priv
))
5230 I915_WRITE(GEN6_RC6_WAKE_RATE_LIMIT
, 108 << 16);
5232 I915_WRITE(GEN6_RC6_WAKE_RATE_LIMIT
, 54 << 16);
5233 I915_WRITE(GEN6_RC_EVALUATION_INTERVAL
, 125000); /* 12500 * 1280ns */
5234 I915_WRITE(GEN6_RC_IDLE_HYSTERSIS
, 25); /* 25 * 1280ns */
5235 for_each_engine(engine
, dev_priv
)
5236 I915_WRITE(RING_MAX_IDLE(engine
->mmio_base
), 10);
5238 if (HAS_GUC(dev_priv
))
5239 I915_WRITE(GUC_MAX_IDLE_COUNT
, 0xA);
5241 I915_WRITE(GEN6_RC_SLEEP
, 0);
5243 /* 2c: Program Coarse Power Gating Policies. */
5244 I915_WRITE(GEN9_MEDIA_PG_IDLE_HYSTERESIS
, 25);
5245 I915_WRITE(GEN9_RENDER_PG_IDLE_HYSTERESIS
, 25);
5247 /* 3a: Enable RC6 */
5248 if (intel_enable_rc6() & INTEL_RC6_ENABLE
)
5249 rc6_mask
= GEN6_RC_CTL_RC6_ENABLE
;
5250 DRM_INFO("RC6 %s\n", onoff(rc6_mask
& GEN6_RC_CTL_RC6_ENABLE
));
5251 /* WaRsUseTimeoutMode */
5252 if (IS_SKL_REVID(dev_priv
, 0, SKL_REVID_D0
) ||
5253 IS_BXT_REVID(dev_priv
, 0, BXT_REVID_A1
)) {
5254 I915_WRITE(GEN6_RC6_THRESHOLD
, 625); /* 800us */
5255 I915_WRITE(GEN6_RC_CONTROL
, GEN6_RC_CTL_HW_ENABLE
|
5256 GEN7_RC_CTL_TO_MODE
|
5259 I915_WRITE(GEN6_RC6_THRESHOLD
, 37500); /* 37.5/125ms per EI */
5260 I915_WRITE(GEN6_RC_CONTROL
, GEN6_RC_CTL_HW_ENABLE
|
5261 GEN6_RC_CTL_EI_MODE(1) |
5266 * 3b: Enable Coarse Power Gating only when RC6 is enabled.
5267 * WaRsDisableCoarsePowerGating:skl,bxt - Render/Media PG need to be disabled with RC6.
5269 if (NEEDS_WaRsDisableCoarsePowerGating(dev_priv
))
5270 I915_WRITE(GEN9_PG_ENABLE
, 0);
5272 I915_WRITE(GEN9_PG_ENABLE
, (rc6_mask
& GEN6_RC_CTL_RC6_ENABLE
) ?
5273 (GEN9_RENDER_PG_ENABLE
| GEN9_MEDIA_PG_ENABLE
) : 0);
5275 intel_uncore_forcewake_put(dev_priv
, FORCEWAKE_ALL
);
5278 static void gen8_enable_rps(struct drm_i915_private
*dev_priv
)
5280 struct intel_engine_cs
*engine
;
5281 uint32_t rc6_mask
= 0;
5283 /* 1a: Software RC state - RC0 */
5284 I915_WRITE(GEN6_RC_STATE
, 0);
5286 /* 1c & 1d: Get forcewake during program sequence. Although the driver
5287 * hasn't enabled a state yet where we need forcewake, BIOS may have.*/
5288 intel_uncore_forcewake_get(dev_priv
, FORCEWAKE_ALL
);
5290 /* 2a: Disable RC states. */
5291 I915_WRITE(GEN6_RC_CONTROL
, 0);
5293 /* 2b: Program RC6 thresholds.*/
5294 I915_WRITE(GEN6_RC6_WAKE_RATE_LIMIT
, 40 << 16);
5295 I915_WRITE(GEN6_RC_EVALUATION_INTERVAL
, 125000); /* 12500 * 1280ns */
5296 I915_WRITE(GEN6_RC_IDLE_HYSTERSIS
, 25); /* 25 * 1280ns */
5297 for_each_engine(engine
, dev_priv
)
5298 I915_WRITE(RING_MAX_IDLE(engine
->mmio_base
), 10);
5299 I915_WRITE(GEN6_RC_SLEEP
, 0);
5300 if (IS_BROADWELL(dev_priv
))
5301 I915_WRITE(GEN6_RC6_THRESHOLD
, 625); /* 800us/1.28 for TO */
5303 I915_WRITE(GEN6_RC6_THRESHOLD
, 50000); /* 50/125ms per EI */
5306 if (intel_enable_rc6() & INTEL_RC6_ENABLE
)
5307 rc6_mask
= GEN6_RC_CTL_RC6_ENABLE
;
5308 intel_print_rc6_info(dev_priv
, rc6_mask
);
5309 if (IS_BROADWELL(dev_priv
))
5310 I915_WRITE(GEN6_RC_CONTROL
, GEN6_RC_CTL_HW_ENABLE
|
5311 GEN7_RC_CTL_TO_MODE
|
5314 I915_WRITE(GEN6_RC_CONTROL
, GEN6_RC_CTL_HW_ENABLE
|
5315 GEN6_RC_CTL_EI_MODE(1) |
5318 /* 4 Program defaults and thresholds for RPS*/
5319 I915_WRITE(GEN6_RPNSWREQ
,
5320 HSW_FREQUENCY(dev_priv
->rps
.rp1_freq
));
5321 I915_WRITE(GEN6_RC_VIDEO_FREQ
,
5322 HSW_FREQUENCY(dev_priv
->rps
.rp1_freq
));
5323 /* NB: Docs say 1s, and 1000000 - which aren't equivalent */
5324 I915_WRITE(GEN6_RP_DOWN_TIMEOUT
, 100000000 / 128); /* 1 second timeout */
5326 /* Docs recommend 900MHz, and 300 MHz respectively */
5327 I915_WRITE(GEN6_RP_INTERRUPT_LIMITS
,
5328 dev_priv
->rps
.max_freq_softlimit
<< 24 |
5329 dev_priv
->rps
.min_freq_softlimit
<< 16);
5331 I915_WRITE(GEN6_RP_UP_THRESHOLD
, 7600000 / 128); /* 76ms busyness per EI, 90% */
5332 I915_WRITE(GEN6_RP_DOWN_THRESHOLD
, 31300000 / 128); /* 313ms busyness per EI, 70%*/
5333 I915_WRITE(GEN6_RP_UP_EI
, 66000); /* 84.48ms, XXX: random? */
5334 I915_WRITE(GEN6_RP_DOWN_EI
, 350000); /* 448ms, XXX: random? */
5336 I915_WRITE(GEN6_RP_IDLE_HYSTERSIS
, 10);
5339 I915_WRITE(GEN6_RP_CONTROL
,
5340 GEN6_RP_MEDIA_TURBO
|
5341 GEN6_RP_MEDIA_HW_NORMAL_MODE
|
5342 GEN6_RP_MEDIA_IS_GFX
|
5344 GEN6_RP_UP_BUSY_AVG
|
5345 GEN6_RP_DOWN_IDLE_AVG
);
5347 /* 6: Ring frequency + overclocking (our driver does this later */
5349 reset_rps(dev_priv
, gen6_set_rps
);
5351 intel_uncore_forcewake_put(dev_priv
, FORCEWAKE_ALL
);
5354 static void gen6_enable_rps(struct drm_i915_private
*dev_priv
)
5356 struct intel_engine_cs
*engine
;
5357 u32 rc6vids
, rc6_mask
= 0;
5362 WARN_ON(!mutex_is_locked(&dev_priv
->rps
.hw_lock
));
5364 /* Here begins a magic sequence of register writes to enable
5365 * auto-downclocking.
5367 * Perhaps there might be some value in exposing these to
5370 I915_WRITE(GEN6_RC_STATE
, 0);
5372 /* Clear the DBG now so we don't confuse earlier errors */
5373 gtfifodbg
= I915_READ(GTFIFODBG
);
5375 DRM_ERROR("GT fifo had a previous error %x\n", gtfifodbg
);
5376 I915_WRITE(GTFIFODBG
, gtfifodbg
);
5379 intel_uncore_forcewake_get(dev_priv
, FORCEWAKE_ALL
);
5381 /* disable the counters and set deterministic thresholds */
5382 I915_WRITE(GEN6_RC_CONTROL
, 0);
5384 I915_WRITE(GEN6_RC1_WAKE_RATE_LIMIT
, 1000 << 16);
5385 I915_WRITE(GEN6_RC6_WAKE_RATE_LIMIT
, 40 << 16 | 30);
5386 I915_WRITE(GEN6_RC6pp_WAKE_RATE_LIMIT
, 30);
5387 I915_WRITE(GEN6_RC_EVALUATION_INTERVAL
, 125000);
5388 I915_WRITE(GEN6_RC_IDLE_HYSTERSIS
, 25);
5390 for_each_engine(engine
, dev_priv
)
5391 I915_WRITE(RING_MAX_IDLE(engine
->mmio_base
), 10);
5393 I915_WRITE(GEN6_RC_SLEEP
, 0);
5394 I915_WRITE(GEN6_RC1e_THRESHOLD
, 1000);
5395 if (IS_IVYBRIDGE(dev_priv
))
5396 I915_WRITE(GEN6_RC6_THRESHOLD
, 125000);
5398 I915_WRITE(GEN6_RC6_THRESHOLD
, 50000);
5399 I915_WRITE(GEN6_RC6p_THRESHOLD
, 150000);
5400 I915_WRITE(GEN6_RC6pp_THRESHOLD
, 64000); /* unused */
5402 /* Check if we are enabling RC6 */
5403 rc6_mode
= intel_enable_rc6();
5404 if (rc6_mode
& INTEL_RC6_ENABLE
)
5405 rc6_mask
|= GEN6_RC_CTL_RC6_ENABLE
;
5407 /* We don't use those on Haswell */
5408 if (!IS_HASWELL(dev_priv
)) {
5409 if (rc6_mode
& INTEL_RC6p_ENABLE
)
5410 rc6_mask
|= GEN6_RC_CTL_RC6p_ENABLE
;
5412 if (rc6_mode
& INTEL_RC6pp_ENABLE
)
5413 rc6_mask
|= GEN6_RC_CTL_RC6pp_ENABLE
;
5416 intel_print_rc6_info(dev_priv
, rc6_mask
);
5418 I915_WRITE(GEN6_RC_CONTROL
,
5420 GEN6_RC_CTL_EI_MODE(1) |
5421 GEN6_RC_CTL_HW_ENABLE
);
5423 /* Power down if completely idle for over 50ms */
5424 I915_WRITE(GEN6_RP_DOWN_TIMEOUT
, 50000);
5425 I915_WRITE(GEN6_RP_IDLE_HYSTERSIS
, 10);
5427 ret
= sandybridge_pcode_write(dev_priv
, GEN6_PCODE_WRITE_MIN_FREQ_TABLE
, 0);
5429 DRM_DEBUG_DRIVER("Failed to set the min frequency\n");
5431 reset_rps(dev_priv
, gen6_set_rps
);
5434 ret
= sandybridge_pcode_read(dev_priv
, GEN6_PCODE_READ_RC6VIDS
, &rc6vids
);
5435 if (IS_GEN6(dev_priv
) && ret
) {
5436 DRM_DEBUG_DRIVER("Couldn't check for BIOS workaround\n");
5437 } else if (IS_GEN6(dev_priv
) && (GEN6_DECODE_RC6_VID(rc6vids
& 0xff) < 450)) {
5438 DRM_DEBUG_DRIVER("You should update your BIOS. Correcting minimum rc6 voltage (%dmV->%dmV)\n",
5439 GEN6_DECODE_RC6_VID(rc6vids
& 0xff), 450);
5440 rc6vids
&= 0xffff00;
5441 rc6vids
|= GEN6_ENCODE_RC6_VID(450);
5442 ret
= sandybridge_pcode_write(dev_priv
, GEN6_PCODE_WRITE_RC6VIDS
, rc6vids
);
5444 DRM_ERROR("Couldn't fix incorrect rc6 voltage\n");
5447 intel_uncore_forcewake_put(dev_priv
, FORCEWAKE_ALL
);
5450 static void gen6_update_ring_freq(struct drm_i915_private
*dev_priv
)
5453 unsigned int gpu_freq
;
5454 unsigned int max_ia_freq
, min_ring_freq
;
5455 unsigned int max_gpu_freq
, min_gpu_freq
;
5456 int scaling_factor
= 180;
5457 struct cpufreq_policy
*policy
;
5459 WARN_ON(!mutex_is_locked(&dev_priv
->rps
.hw_lock
));
5461 policy
= cpufreq_cpu_get(0);
5463 max_ia_freq
= policy
->cpuinfo
.max_freq
;
5464 cpufreq_cpu_put(policy
);
5467 * Default to measured freq if none found, PCU will ensure we
5470 max_ia_freq
= tsc_khz
;
5473 /* Convert from kHz to MHz */
5474 max_ia_freq
/= 1000;
5476 min_ring_freq
= I915_READ(DCLK
) & 0xf;
5477 /* convert DDR frequency from units of 266.6MHz to bandwidth */
5478 min_ring_freq
= mult_frac(min_ring_freq
, 8, 3);
5480 if (IS_SKYLAKE(dev_priv
) || IS_KABYLAKE(dev_priv
)) {
5481 /* Convert GT frequency to 50 HZ units */
5482 min_gpu_freq
= dev_priv
->rps
.min_freq
/ GEN9_FREQ_SCALER
;
5483 max_gpu_freq
= dev_priv
->rps
.max_freq
/ GEN9_FREQ_SCALER
;
5485 min_gpu_freq
= dev_priv
->rps
.min_freq
;
5486 max_gpu_freq
= dev_priv
->rps
.max_freq
;
5490 * For each potential GPU frequency, load a ring frequency we'd like
5491 * to use for memory access. We do this by specifying the IA frequency
5492 * the PCU should use as a reference to determine the ring frequency.
5494 for (gpu_freq
= max_gpu_freq
; gpu_freq
>= min_gpu_freq
; gpu_freq
--) {
5495 int diff
= max_gpu_freq
- gpu_freq
;
5496 unsigned int ia_freq
= 0, ring_freq
= 0;
5498 if (IS_SKYLAKE(dev_priv
) || IS_KABYLAKE(dev_priv
)) {
5500 * ring_freq = 2 * GT. ring_freq is in 100MHz units
5501 * No floor required for ring frequency on SKL.
5503 ring_freq
= gpu_freq
;
5504 } else if (INTEL_INFO(dev_priv
)->gen
>= 8) {
5505 /* max(2 * GT, DDR). NB: GT is 50MHz units */
5506 ring_freq
= max(min_ring_freq
, gpu_freq
);
5507 } else if (IS_HASWELL(dev_priv
)) {
5508 ring_freq
= mult_frac(gpu_freq
, 5, 4);
5509 ring_freq
= max(min_ring_freq
, ring_freq
);
5510 /* leave ia_freq as the default, chosen by cpufreq */
5512 /* On older processors, there is no separate ring
5513 * clock domain, so in order to boost the bandwidth
5514 * of the ring, we need to upclock the CPU (ia_freq).
5516 * For GPU frequencies less than 750MHz,
5517 * just use the lowest ring freq.
5519 if (gpu_freq
< min_freq
)
5522 ia_freq
= max_ia_freq
- ((diff
* scaling_factor
) / 2);
5523 ia_freq
= DIV_ROUND_CLOSEST(ia_freq
, 100);
5526 sandybridge_pcode_write(dev_priv
,
5527 GEN6_PCODE_WRITE_MIN_FREQ_TABLE
,
5528 ia_freq
<< GEN6_PCODE_FREQ_IA_RATIO_SHIFT
|
5529 ring_freq
<< GEN6_PCODE_FREQ_RING_RATIO_SHIFT
|
5534 static int cherryview_rps_max_freq(struct drm_i915_private
*dev_priv
)
5538 val
= vlv_punit_read(dev_priv
, FB_GFX_FMAX_AT_VMAX_FUSE
);
5540 switch (INTEL_INFO(dev_priv
)->eu_total
) {
5542 /* (2 * 4) config */
5543 rp0
= (val
>> FB_GFX_FMAX_AT_VMAX_2SS4EU_FUSE_SHIFT
);
5546 /* (2 * 6) config */
5547 rp0
= (val
>> FB_GFX_FMAX_AT_VMAX_2SS6EU_FUSE_SHIFT
);
5550 /* (2 * 8) config */
5552 /* Setting (2 * 8) Min RP0 for any other combination */
5553 rp0
= (val
>> FB_GFX_FMAX_AT_VMAX_2SS8EU_FUSE_SHIFT
);
5557 rp0
= (rp0
& FB_GFX_FREQ_FUSE_MASK
);
5562 static int cherryview_rps_rpe_freq(struct drm_i915_private
*dev_priv
)
5566 val
= vlv_punit_read(dev_priv
, PUNIT_GPU_DUTYCYCLE_REG
);
5567 rpe
= (val
>> PUNIT_GPU_DUTYCYCLE_RPE_FREQ_SHIFT
) & PUNIT_GPU_DUTYCYCLE_RPE_FREQ_MASK
;
5572 static int cherryview_rps_guar_freq(struct drm_i915_private
*dev_priv
)
5576 val
= vlv_punit_read(dev_priv
, FB_GFX_FMAX_AT_VMAX_FUSE
);
5577 rp1
= (val
& FB_GFX_FREQ_FUSE_MASK
);
5582 static int valleyview_rps_guar_freq(struct drm_i915_private
*dev_priv
)
5586 val
= vlv_nc_read(dev_priv
, IOSF_NC_FB_GFX_FREQ_FUSE
);
5588 rp1
= (val
& FB_GFX_FGUARANTEED_FREQ_FUSE_MASK
) >> FB_GFX_FGUARANTEED_FREQ_FUSE_SHIFT
;
5593 static int valleyview_rps_max_freq(struct drm_i915_private
*dev_priv
)
5597 val
= vlv_nc_read(dev_priv
, IOSF_NC_FB_GFX_FREQ_FUSE
);
5599 rp0
= (val
& FB_GFX_MAX_FREQ_FUSE_MASK
) >> FB_GFX_MAX_FREQ_FUSE_SHIFT
;
5601 rp0
= min_t(u32
, rp0
, 0xea);
5606 static int valleyview_rps_rpe_freq(struct drm_i915_private
*dev_priv
)
5610 val
= vlv_nc_read(dev_priv
, IOSF_NC_FB_GFX_FMAX_FUSE_LO
);
5611 rpe
= (val
& FB_FMAX_VMIN_FREQ_LO_MASK
) >> FB_FMAX_VMIN_FREQ_LO_SHIFT
;
5612 val
= vlv_nc_read(dev_priv
, IOSF_NC_FB_GFX_FMAX_FUSE_HI
);
5613 rpe
|= (val
& FB_FMAX_VMIN_FREQ_HI_MASK
) << 5;
5618 static int valleyview_rps_min_freq(struct drm_i915_private
*dev_priv
)
5622 val
= vlv_punit_read(dev_priv
, PUNIT_REG_GPU_LFM
) & 0xff;
5624 * According to the BYT Punit GPU turbo HAS 1.1.6.3 the minimum value
5625 * for the minimum frequency in GPLL mode is 0xc1. Contrary to this on
5626 * a BYT-M B0 the above register contains 0xbf. Moreover when setting
5627 * a frequency Punit will not allow values below 0xc0. Clamp it 0xc0
5628 * to make sure it matches what Punit accepts.
5630 return max_t(u32
, val
, 0xc0);
5633 /* Check that the pctx buffer wasn't move under us. */
5634 static void valleyview_check_pctx(struct drm_i915_private
*dev_priv
)
5636 unsigned long pctx_addr
= I915_READ(VLV_PCBR
) & ~4095;
5638 WARN_ON(pctx_addr
!= dev_priv
->mm
.stolen_base
+
5639 dev_priv
->vlv_pctx
->stolen
->start
);
5643 /* Check that the pcbr address is not empty. */
5644 static void cherryview_check_pctx(struct drm_i915_private
*dev_priv
)
5646 unsigned long pctx_addr
= I915_READ(VLV_PCBR
) & ~4095;
5648 WARN_ON((pctx_addr
>> VLV_PCBR_ADDR_SHIFT
) == 0);
5651 static void cherryview_setup_pctx(struct drm_i915_private
*dev_priv
)
5653 struct i915_ggtt
*ggtt
= &dev_priv
->ggtt
;
5654 unsigned long pctx_paddr
, paddr
;
5656 int pctx_size
= 32*1024;
5658 pcbr
= I915_READ(VLV_PCBR
);
5659 if ((pcbr
>> VLV_PCBR_ADDR_SHIFT
) == 0) {
5660 DRM_DEBUG_DRIVER("BIOS didn't set up PCBR, fixing up\n");
5661 paddr
= (dev_priv
->mm
.stolen_base
+
5662 (ggtt
->stolen_size
- pctx_size
));
5664 pctx_paddr
= (paddr
& (~4095));
5665 I915_WRITE(VLV_PCBR
, pctx_paddr
);
5668 DRM_DEBUG_DRIVER("PCBR: 0x%08x\n", I915_READ(VLV_PCBR
));
5671 static void valleyview_setup_pctx(struct drm_i915_private
*dev_priv
)
5673 struct drm_i915_gem_object
*pctx
;
5674 unsigned long pctx_paddr
;
5676 int pctx_size
= 24*1024;
5678 pcbr
= I915_READ(VLV_PCBR
);
5680 /* BIOS set it up already, grab the pre-alloc'd space */
5683 pcbr_offset
= (pcbr
& (~4095)) - dev_priv
->mm
.stolen_base
;
5684 pctx
= i915_gem_object_create_stolen_for_preallocated(&dev_priv
->drm
,
5686 I915_GTT_OFFSET_NONE
,
5691 DRM_DEBUG_DRIVER("BIOS didn't set up PCBR, fixing up\n");
5694 * From the Gunit register HAS:
5695 * The Gfx driver is expected to program this register and ensure
5696 * proper allocation within Gfx stolen memory. For example, this
5697 * register should be programmed such than the PCBR range does not
5698 * overlap with other ranges, such as the frame buffer, protected
5699 * memory, or any other relevant ranges.
5701 pctx
= i915_gem_object_create_stolen(&dev_priv
->drm
, pctx_size
);
5703 DRM_DEBUG("not enough stolen space for PCTX, disabling\n");
5707 pctx_paddr
= dev_priv
->mm
.stolen_base
+ pctx
->stolen
->start
;
5708 I915_WRITE(VLV_PCBR
, pctx_paddr
);
5711 DRM_DEBUG_DRIVER("PCBR: 0x%08x\n", I915_READ(VLV_PCBR
));
5712 dev_priv
->vlv_pctx
= pctx
;
5715 static void valleyview_cleanup_pctx(struct drm_i915_private
*dev_priv
)
5717 if (WARN_ON(!dev_priv
->vlv_pctx
))
5720 i915_gem_object_put_unlocked(dev_priv
->vlv_pctx
);
5721 dev_priv
->vlv_pctx
= NULL
;
5724 static void vlv_init_gpll_ref_freq(struct drm_i915_private
*dev_priv
)
5726 dev_priv
->rps
.gpll_ref_freq
=
5727 vlv_get_cck_clock(dev_priv
, "GPLL ref",
5728 CCK_GPLL_CLOCK_CONTROL
,
5729 dev_priv
->czclk_freq
);
5731 DRM_DEBUG_DRIVER("GPLL reference freq: %d kHz\n",
5732 dev_priv
->rps
.gpll_ref_freq
);
5735 static void valleyview_init_gt_powersave(struct drm_i915_private
*dev_priv
)
5739 valleyview_setup_pctx(dev_priv
);
5741 vlv_init_gpll_ref_freq(dev_priv
);
5743 val
= vlv_punit_read(dev_priv
, PUNIT_REG_GPU_FREQ_STS
);
5744 switch ((val
>> 6) & 3) {
5747 dev_priv
->mem_freq
= 800;
5750 dev_priv
->mem_freq
= 1066;
5753 dev_priv
->mem_freq
= 1333;
5756 DRM_DEBUG_DRIVER("DDR speed: %d MHz\n", dev_priv
->mem_freq
);
5758 dev_priv
->rps
.max_freq
= valleyview_rps_max_freq(dev_priv
);
5759 dev_priv
->rps
.rp0_freq
= dev_priv
->rps
.max_freq
;
5760 DRM_DEBUG_DRIVER("max GPU freq: %d MHz (%u)\n",
5761 intel_gpu_freq(dev_priv
, dev_priv
->rps
.max_freq
),
5762 dev_priv
->rps
.max_freq
);
5764 dev_priv
->rps
.efficient_freq
= valleyview_rps_rpe_freq(dev_priv
);
5765 DRM_DEBUG_DRIVER("RPe GPU freq: %d MHz (%u)\n",
5766 intel_gpu_freq(dev_priv
, dev_priv
->rps
.efficient_freq
),
5767 dev_priv
->rps
.efficient_freq
);
5769 dev_priv
->rps
.rp1_freq
= valleyview_rps_guar_freq(dev_priv
);
5770 DRM_DEBUG_DRIVER("RP1(Guar Freq) GPU freq: %d MHz (%u)\n",
5771 intel_gpu_freq(dev_priv
, dev_priv
->rps
.rp1_freq
),
5772 dev_priv
->rps
.rp1_freq
);
5774 dev_priv
->rps
.min_freq
= valleyview_rps_min_freq(dev_priv
);
5775 DRM_DEBUG_DRIVER("min GPU freq: %d MHz (%u)\n",
5776 intel_gpu_freq(dev_priv
, dev_priv
->rps
.min_freq
),
5777 dev_priv
->rps
.min_freq
);
5780 static void cherryview_init_gt_powersave(struct drm_i915_private
*dev_priv
)
5784 cherryview_setup_pctx(dev_priv
);
5786 vlv_init_gpll_ref_freq(dev_priv
);
5788 mutex_lock(&dev_priv
->sb_lock
);
5789 val
= vlv_cck_read(dev_priv
, CCK_FUSE_REG
);
5790 mutex_unlock(&dev_priv
->sb_lock
);
5792 switch ((val
>> 2) & 0x7) {
5794 dev_priv
->mem_freq
= 2000;
5797 dev_priv
->mem_freq
= 1600;
5800 DRM_DEBUG_DRIVER("DDR speed: %d MHz\n", dev_priv
->mem_freq
);
5802 dev_priv
->rps
.max_freq
= cherryview_rps_max_freq(dev_priv
);
5803 dev_priv
->rps
.rp0_freq
= dev_priv
->rps
.max_freq
;
5804 DRM_DEBUG_DRIVER("max GPU freq: %d MHz (%u)\n",
5805 intel_gpu_freq(dev_priv
, dev_priv
->rps
.max_freq
),
5806 dev_priv
->rps
.max_freq
);
5808 dev_priv
->rps
.efficient_freq
= cherryview_rps_rpe_freq(dev_priv
);
5809 DRM_DEBUG_DRIVER("RPe GPU freq: %d MHz (%u)\n",
5810 intel_gpu_freq(dev_priv
, dev_priv
->rps
.efficient_freq
),
5811 dev_priv
->rps
.efficient_freq
);
5813 dev_priv
->rps
.rp1_freq
= cherryview_rps_guar_freq(dev_priv
);
5814 DRM_DEBUG_DRIVER("RP1(Guar) GPU freq: %d MHz (%u)\n",
5815 intel_gpu_freq(dev_priv
, dev_priv
->rps
.rp1_freq
),
5816 dev_priv
->rps
.rp1_freq
);
5818 /* PUnit validated range is only [RPe, RP0] */
5819 dev_priv
->rps
.min_freq
= dev_priv
->rps
.efficient_freq
;
5820 DRM_DEBUG_DRIVER("min GPU freq: %d MHz (%u)\n",
5821 intel_gpu_freq(dev_priv
, dev_priv
->rps
.min_freq
),
5822 dev_priv
->rps
.min_freq
);
5824 WARN_ONCE((dev_priv
->rps
.max_freq
|
5825 dev_priv
->rps
.efficient_freq
|
5826 dev_priv
->rps
.rp1_freq
|
5827 dev_priv
->rps
.min_freq
) & 1,
5828 "Odd GPU freq values\n");
5831 static void valleyview_cleanup_gt_powersave(struct drm_i915_private
*dev_priv
)
5833 valleyview_cleanup_pctx(dev_priv
);
5836 static void cherryview_enable_rps(struct drm_i915_private
*dev_priv
)
5838 struct intel_engine_cs
*engine
;
5839 u32 gtfifodbg
, val
, rc6_mode
= 0, pcbr
;
5841 WARN_ON(!mutex_is_locked(&dev_priv
->rps
.hw_lock
));
5843 gtfifodbg
= I915_READ(GTFIFODBG
) & ~(GT_FIFO_SBDEDICATE_FREE_ENTRY_CHV
|
5844 GT_FIFO_FREE_ENTRIES_CHV
);
5846 DRM_DEBUG_DRIVER("GT fifo had a previous error %x\n",
5848 I915_WRITE(GTFIFODBG
, gtfifodbg
);
5851 cherryview_check_pctx(dev_priv
);
5853 /* 1a & 1b: Get forcewake during program sequence. Although the driver
5854 * hasn't enabled a state yet where we need forcewake, BIOS may have.*/
5855 intel_uncore_forcewake_get(dev_priv
, FORCEWAKE_ALL
);
5857 /* Disable RC states. */
5858 I915_WRITE(GEN6_RC_CONTROL
, 0);
5860 /* 2a: Program RC6 thresholds.*/
5861 I915_WRITE(GEN6_RC6_WAKE_RATE_LIMIT
, 40 << 16);
5862 I915_WRITE(GEN6_RC_EVALUATION_INTERVAL
, 125000); /* 12500 * 1280ns */
5863 I915_WRITE(GEN6_RC_IDLE_HYSTERSIS
, 25); /* 25 * 1280ns */
5865 for_each_engine(engine
, dev_priv
)
5866 I915_WRITE(RING_MAX_IDLE(engine
->mmio_base
), 10);
5867 I915_WRITE(GEN6_RC_SLEEP
, 0);
5869 /* TO threshold set to 500 us ( 0x186 * 1.28 us) */
5870 I915_WRITE(GEN6_RC6_THRESHOLD
, 0x186);
5872 /* allows RC6 residency counter to work */
5873 I915_WRITE(VLV_COUNTER_CONTROL
,
5874 _MASKED_BIT_ENABLE(VLV_COUNT_RANGE_HIGH
|
5875 VLV_MEDIA_RC6_COUNT_EN
|
5876 VLV_RENDER_RC6_COUNT_EN
));
5878 /* For now we assume BIOS is allocating and populating the PCBR */
5879 pcbr
= I915_READ(VLV_PCBR
);
5882 if ((intel_enable_rc6() & INTEL_RC6_ENABLE
) &&
5883 (pcbr
>> VLV_PCBR_ADDR_SHIFT
))
5884 rc6_mode
= GEN7_RC_CTL_TO_MODE
;
5886 I915_WRITE(GEN6_RC_CONTROL
, rc6_mode
);
5888 /* 4 Program defaults and thresholds for RPS*/
5889 I915_WRITE(GEN6_RP_DOWN_TIMEOUT
, 1000000);
5890 I915_WRITE(GEN6_RP_UP_THRESHOLD
, 59400);
5891 I915_WRITE(GEN6_RP_DOWN_THRESHOLD
, 245000);
5892 I915_WRITE(GEN6_RP_UP_EI
, 66000);
5893 I915_WRITE(GEN6_RP_DOWN_EI
, 350000);
5895 I915_WRITE(GEN6_RP_IDLE_HYSTERSIS
, 10);
5898 I915_WRITE(GEN6_RP_CONTROL
,
5899 GEN6_RP_MEDIA_HW_NORMAL_MODE
|
5900 GEN6_RP_MEDIA_IS_GFX
|
5902 GEN6_RP_UP_BUSY_AVG
|
5903 GEN6_RP_DOWN_IDLE_AVG
);
5905 /* Setting Fixed Bias */
5906 val
= VLV_OVERRIDE_EN
|
5908 CHV_BIAS_CPU_50_SOC_50
;
5909 vlv_punit_write(dev_priv
, VLV_TURBO_SOC_OVERRIDE
, val
);
5911 val
= vlv_punit_read(dev_priv
, PUNIT_REG_GPU_FREQ_STS
);
5913 /* RPS code assumes GPLL is used */
5914 WARN_ONCE((val
& GPLLENABLE
) == 0, "GPLL not enabled\n");
5916 DRM_DEBUG_DRIVER("GPLL enabled? %s\n", yesno(val
& GPLLENABLE
));
5917 DRM_DEBUG_DRIVER("GPU status: 0x%08x\n", val
);
5919 reset_rps(dev_priv
, valleyview_set_rps
);
5921 intel_uncore_forcewake_put(dev_priv
, FORCEWAKE_ALL
);
5924 static void valleyview_enable_rps(struct drm_i915_private
*dev_priv
)
5926 struct intel_engine_cs
*engine
;
5927 u32 gtfifodbg
, val
, rc6_mode
= 0;
5929 WARN_ON(!mutex_is_locked(&dev_priv
->rps
.hw_lock
));
5931 valleyview_check_pctx(dev_priv
);
5933 gtfifodbg
= I915_READ(GTFIFODBG
);
5935 DRM_DEBUG_DRIVER("GT fifo had a previous error %x\n",
5937 I915_WRITE(GTFIFODBG
, gtfifodbg
);
5940 /* If VLV, Forcewake all wells, else re-direct to regular path */
5941 intel_uncore_forcewake_get(dev_priv
, FORCEWAKE_ALL
);
5943 /* Disable RC states. */
5944 I915_WRITE(GEN6_RC_CONTROL
, 0);
5946 I915_WRITE(GEN6_RP_DOWN_TIMEOUT
, 1000000);
5947 I915_WRITE(GEN6_RP_UP_THRESHOLD
, 59400);
5948 I915_WRITE(GEN6_RP_DOWN_THRESHOLD
, 245000);
5949 I915_WRITE(GEN6_RP_UP_EI
, 66000);
5950 I915_WRITE(GEN6_RP_DOWN_EI
, 350000);
5952 I915_WRITE(GEN6_RP_IDLE_HYSTERSIS
, 10);
5954 I915_WRITE(GEN6_RP_CONTROL
,
5955 GEN6_RP_MEDIA_TURBO
|
5956 GEN6_RP_MEDIA_HW_NORMAL_MODE
|
5957 GEN6_RP_MEDIA_IS_GFX
|
5959 GEN6_RP_UP_BUSY_AVG
|
5960 GEN6_RP_DOWN_IDLE_CONT
);
5962 I915_WRITE(GEN6_RC6_WAKE_RATE_LIMIT
, 0x00280000);
5963 I915_WRITE(GEN6_RC_EVALUATION_INTERVAL
, 125000);
5964 I915_WRITE(GEN6_RC_IDLE_HYSTERSIS
, 25);
5966 for_each_engine(engine
, dev_priv
)
5967 I915_WRITE(RING_MAX_IDLE(engine
->mmio_base
), 10);
5969 I915_WRITE(GEN6_RC6_THRESHOLD
, 0x557);
5971 /* allows RC6 residency counter to work */
5972 I915_WRITE(VLV_COUNTER_CONTROL
,
5973 _MASKED_BIT_ENABLE(VLV_MEDIA_RC0_COUNT_EN
|
5974 VLV_RENDER_RC0_COUNT_EN
|
5975 VLV_MEDIA_RC6_COUNT_EN
|
5976 VLV_RENDER_RC6_COUNT_EN
));
5978 if (intel_enable_rc6() & INTEL_RC6_ENABLE
)
5979 rc6_mode
= GEN7_RC_CTL_TO_MODE
| VLV_RC_CTL_CTX_RST_PARALLEL
;
5981 intel_print_rc6_info(dev_priv
, rc6_mode
);
5983 I915_WRITE(GEN6_RC_CONTROL
, rc6_mode
);
5985 /* Setting Fixed Bias */
5986 val
= VLV_OVERRIDE_EN
|
5988 VLV_BIAS_CPU_125_SOC_875
;
5989 vlv_punit_write(dev_priv
, VLV_TURBO_SOC_OVERRIDE
, val
);
5991 val
= vlv_punit_read(dev_priv
, PUNIT_REG_GPU_FREQ_STS
);
5993 /* RPS code assumes GPLL is used */
5994 WARN_ONCE((val
& GPLLENABLE
) == 0, "GPLL not enabled\n");
5996 DRM_DEBUG_DRIVER("GPLL enabled? %s\n", yesno(val
& GPLLENABLE
));
5997 DRM_DEBUG_DRIVER("GPU status: 0x%08x\n", val
);
5999 reset_rps(dev_priv
, valleyview_set_rps
);
6001 intel_uncore_forcewake_put(dev_priv
, FORCEWAKE_ALL
);
6004 static unsigned long intel_pxfreq(u32 vidfreq
)
6007 int div
= (vidfreq
& 0x3f0000) >> 16;
6008 int post
= (vidfreq
& 0x3000) >> 12;
6009 int pre
= (vidfreq
& 0x7);
6014 freq
= ((div
* 133333) / ((1<<post
) * pre
));
6019 static const struct cparams
{
6025 { 1, 1333, 301, 28664 },
6026 { 1, 1066, 294, 24460 },
6027 { 1, 800, 294, 25192 },
6028 { 0, 1333, 276, 27605 },
6029 { 0, 1066, 276, 27605 },
6030 { 0, 800, 231, 23784 },
6033 static unsigned long __i915_chipset_val(struct drm_i915_private
*dev_priv
)
6035 u64 total_count
, diff
, ret
;
6036 u32 count1
, count2
, count3
, m
= 0, c
= 0;
6037 unsigned long now
= jiffies_to_msecs(jiffies
), diff1
;
6040 assert_spin_locked(&mchdev_lock
);
6042 diff1
= now
- dev_priv
->ips
.last_time1
;
6044 /* Prevent division-by-zero if we are asking too fast.
6045 * Also, we don't get interesting results if we are polling
6046 * faster than once in 10ms, so just return the saved value
6050 return dev_priv
->ips
.chipset_power
;
6052 count1
= I915_READ(DMIEC
);
6053 count2
= I915_READ(DDREC
);
6054 count3
= I915_READ(CSIEC
);
6056 total_count
= count1
+ count2
+ count3
;
6058 /* FIXME: handle per-counter overflow */
6059 if (total_count
< dev_priv
->ips
.last_count1
) {
6060 diff
= ~0UL - dev_priv
->ips
.last_count1
;
6061 diff
+= total_count
;
6063 diff
= total_count
- dev_priv
->ips
.last_count1
;
6066 for (i
= 0; i
< ARRAY_SIZE(cparams
); i
++) {
6067 if (cparams
[i
].i
== dev_priv
->ips
.c_m
&&
6068 cparams
[i
].t
== dev_priv
->ips
.r_t
) {
6075 diff
= div_u64(diff
, diff1
);
6076 ret
= ((m
* diff
) + c
);
6077 ret
= div_u64(ret
, 10);
6079 dev_priv
->ips
.last_count1
= total_count
;
6080 dev_priv
->ips
.last_time1
= now
;
6082 dev_priv
->ips
.chipset_power
= ret
;
6087 unsigned long i915_chipset_val(struct drm_i915_private
*dev_priv
)
6091 if (INTEL_INFO(dev_priv
)->gen
!= 5)
6094 spin_lock_irq(&mchdev_lock
);
6096 val
= __i915_chipset_val(dev_priv
);
6098 spin_unlock_irq(&mchdev_lock
);
6103 unsigned long i915_mch_val(struct drm_i915_private
*dev_priv
)
6105 unsigned long m
, x
, b
;
6108 tsfs
= I915_READ(TSFS
);
6110 m
= ((tsfs
& TSFS_SLOPE_MASK
) >> TSFS_SLOPE_SHIFT
);
6111 x
= I915_READ8(TR1
);
6113 b
= tsfs
& TSFS_INTR_MASK
;
6115 return ((m
* x
) / 127) - b
;
6118 static int _pxvid_to_vd(u8 pxvid
)
6123 if (pxvid
>= 8 && pxvid
< 31)
6126 return (pxvid
+ 2) * 125;
6129 static u32
pvid_to_extvid(struct drm_i915_private
*dev_priv
, u8 pxvid
)
6131 const int vd
= _pxvid_to_vd(pxvid
);
6132 const int vm
= vd
- 1125;
6134 if (INTEL_INFO(dev_priv
)->is_mobile
)
6135 return vm
> 0 ? vm
: 0;
6140 static void __i915_update_gfx_val(struct drm_i915_private
*dev_priv
)
6142 u64 now
, diff
, diffms
;
6145 assert_spin_locked(&mchdev_lock
);
6147 now
= ktime_get_raw_ns();
6148 diffms
= now
- dev_priv
->ips
.last_time2
;
6149 do_div(diffms
, NSEC_PER_MSEC
);
6151 /* Don't divide by 0 */
6155 count
= I915_READ(GFXEC
);
6157 if (count
< dev_priv
->ips
.last_count2
) {
6158 diff
= ~0UL - dev_priv
->ips
.last_count2
;
6161 diff
= count
- dev_priv
->ips
.last_count2
;
6164 dev_priv
->ips
.last_count2
= count
;
6165 dev_priv
->ips
.last_time2
= now
;
6167 /* More magic constants... */
6169 diff
= div_u64(diff
, diffms
* 10);
6170 dev_priv
->ips
.gfx_power
= diff
;
6173 void i915_update_gfx_val(struct drm_i915_private
*dev_priv
)
6175 if (INTEL_INFO(dev_priv
)->gen
!= 5)
6178 spin_lock_irq(&mchdev_lock
);
6180 __i915_update_gfx_val(dev_priv
);
6182 spin_unlock_irq(&mchdev_lock
);
6185 static unsigned long __i915_gfx_val(struct drm_i915_private
*dev_priv
)
6187 unsigned long t
, corr
, state1
, corr2
, state2
;
6190 assert_spin_locked(&mchdev_lock
);
6192 pxvid
= I915_READ(PXVFREQ(dev_priv
->rps
.cur_freq
));
6193 pxvid
= (pxvid
>> 24) & 0x7f;
6194 ext_v
= pvid_to_extvid(dev_priv
, pxvid
);
6198 t
= i915_mch_val(dev_priv
);
6200 /* Revel in the empirically derived constants */
6202 /* Correction factor in 1/100000 units */
6204 corr
= ((t
* 2349) + 135940);
6206 corr
= ((t
* 964) + 29317);
6208 corr
= ((t
* 301) + 1004);
6210 corr
= corr
* ((150142 * state1
) / 10000 - 78642);
6212 corr2
= (corr
* dev_priv
->ips
.corr
);
6214 state2
= (corr2
* state1
) / 10000;
6215 state2
/= 100; /* convert to mW */
6217 __i915_update_gfx_val(dev_priv
);
6219 return dev_priv
->ips
.gfx_power
+ state2
;
6222 unsigned long i915_gfx_val(struct drm_i915_private
*dev_priv
)
6226 if (INTEL_INFO(dev_priv
)->gen
!= 5)
6229 spin_lock_irq(&mchdev_lock
);
6231 val
= __i915_gfx_val(dev_priv
);
6233 spin_unlock_irq(&mchdev_lock
);
6239 * i915_read_mch_val - return value for IPS use
6241 * Calculate and return a value for the IPS driver to use when deciding whether
6242 * we have thermal and power headroom to increase CPU or GPU power budget.
6244 unsigned long i915_read_mch_val(void)
6246 struct drm_i915_private
*dev_priv
;
6247 unsigned long chipset_val
, graphics_val
, ret
= 0;
6249 spin_lock_irq(&mchdev_lock
);
6252 dev_priv
= i915_mch_dev
;
6254 chipset_val
= __i915_chipset_val(dev_priv
);
6255 graphics_val
= __i915_gfx_val(dev_priv
);
6257 ret
= chipset_val
+ graphics_val
;
6260 spin_unlock_irq(&mchdev_lock
);
6264 EXPORT_SYMBOL_GPL(i915_read_mch_val
);
6267 * i915_gpu_raise - raise GPU frequency limit
6269 * Raise the limit; IPS indicates we have thermal headroom.
6271 bool i915_gpu_raise(void)
6273 struct drm_i915_private
*dev_priv
;
6276 spin_lock_irq(&mchdev_lock
);
6277 if (!i915_mch_dev
) {
6281 dev_priv
= i915_mch_dev
;
6283 if (dev_priv
->ips
.max_delay
> dev_priv
->ips
.fmax
)
6284 dev_priv
->ips
.max_delay
--;
6287 spin_unlock_irq(&mchdev_lock
);
6291 EXPORT_SYMBOL_GPL(i915_gpu_raise
);
6294 * i915_gpu_lower - lower GPU frequency limit
6296 * IPS indicates we're close to a thermal limit, so throttle back the GPU
6297 * frequency maximum.
6299 bool i915_gpu_lower(void)
6301 struct drm_i915_private
*dev_priv
;
6304 spin_lock_irq(&mchdev_lock
);
6305 if (!i915_mch_dev
) {
6309 dev_priv
= i915_mch_dev
;
6311 if (dev_priv
->ips
.max_delay
< dev_priv
->ips
.min_delay
)
6312 dev_priv
->ips
.max_delay
++;
6315 spin_unlock_irq(&mchdev_lock
);
6319 EXPORT_SYMBOL_GPL(i915_gpu_lower
);
6322 * i915_gpu_busy - indicate GPU business to IPS
6324 * Tell the IPS driver whether or not the GPU is busy.
6326 bool i915_gpu_busy(void)
6330 spin_lock_irq(&mchdev_lock
);
6332 ret
= i915_mch_dev
->gt
.awake
;
6333 spin_unlock_irq(&mchdev_lock
);
6337 EXPORT_SYMBOL_GPL(i915_gpu_busy
);
6340 * i915_gpu_turbo_disable - disable graphics turbo
6342 * Disable graphics turbo by resetting the max frequency and setting the
6343 * current frequency to the default.
6345 bool i915_gpu_turbo_disable(void)
6347 struct drm_i915_private
*dev_priv
;
6350 spin_lock_irq(&mchdev_lock
);
6351 if (!i915_mch_dev
) {
6355 dev_priv
= i915_mch_dev
;
6357 dev_priv
->ips
.max_delay
= dev_priv
->ips
.fstart
;
6359 if (!ironlake_set_drps(dev_priv
, dev_priv
->ips
.fstart
))
6363 spin_unlock_irq(&mchdev_lock
);
6367 EXPORT_SYMBOL_GPL(i915_gpu_turbo_disable
);
6370 * Tells the intel_ips driver that the i915 driver is now loaded, if
6371 * IPS got loaded first.
6373 * This awkward dance is so that neither module has to depend on the
6374 * other in order for IPS to do the appropriate communication of
6375 * GPU turbo limits to i915.
6378 ips_ping_for_i915_load(void)
6382 link
= symbol_get(ips_link_to_i915_driver
);
6385 symbol_put(ips_link_to_i915_driver
);
6389 void intel_gpu_ips_init(struct drm_i915_private
*dev_priv
)
6391 /* We only register the i915 ips part with intel-ips once everything is
6392 * set up, to avoid intel-ips sneaking in and reading bogus values. */
6393 spin_lock_irq(&mchdev_lock
);
6394 i915_mch_dev
= dev_priv
;
6395 spin_unlock_irq(&mchdev_lock
);
6397 ips_ping_for_i915_load();
6400 void intel_gpu_ips_teardown(void)
6402 spin_lock_irq(&mchdev_lock
);
6403 i915_mch_dev
= NULL
;
6404 spin_unlock_irq(&mchdev_lock
);
6407 static void intel_init_emon(struct drm_i915_private
*dev_priv
)
6413 /* Disable to program */
6417 /* Program energy weights for various events */
6418 I915_WRITE(SDEW
, 0x15040d00);
6419 I915_WRITE(CSIEW0
, 0x007f0000);
6420 I915_WRITE(CSIEW1
, 0x1e220004);
6421 I915_WRITE(CSIEW2
, 0x04000004);
6423 for (i
= 0; i
< 5; i
++)
6424 I915_WRITE(PEW(i
), 0);
6425 for (i
= 0; i
< 3; i
++)
6426 I915_WRITE(DEW(i
), 0);
6428 /* Program P-state weights to account for frequency power adjustment */
6429 for (i
= 0; i
< 16; i
++) {
6430 u32 pxvidfreq
= I915_READ(PXVFREQ(i
));
6431 unsigned long freq
= intel_pxfreq(pxvidfreq
);
6432 unsigned long vid
= (pxvidfreq
& PXVFREQ_PX_MASK
) >>
6437 val
*= (freq
/ 1000);
6439 val
/= (127*127*900);
6441 DRM_ERROR("bad pxval: %ld\n", val
);
6444 /* Render standby states get 0 weight */
6448 for (i
= 0; i
< 4; i
++) {
6449 u32 val
= (pxw
[i
*4] << 24) | (pxw
[(i
*4)+1] << 16) |
6450 (pxw
[(i
*4)+2] << 8) | (pxw
[(i
*4)+3]);
6451 I915_WRITE(PXW(i
), val
);
6454 /* Adjust magic regs to magic values (more experimental results) */
6455 I915_WRITE(OGW0
, 0);
6456 I915_WRITE(OGW1
, 0);
6457 I915_WRITE(EG0
, 0x00007f00);
6458 I915_WRITE(EG1
, 0x0000000e);
6459 I915_WRITE(EG2
, 0x000e0000);
6460 I915_WRITE(EG3
, 0x68000300);
6461 I915_WRITE(EG4
, 0x42000000);
6462 I915_WRITE(EG5
, 0x00140031);
6466 for (i
= 0; i
< 8; i
++)
6467 I915_WRITE(PXWL(i
), 0);
6469 /* Enable PMON + select events */
6470 I915_WRITE(ECR
, 0x80000019);
6472 lcfuse
= I915_READ(LCFUSE02
);
6474 dev_priv
->ips
.corr
= (lcfuse
& LCFUSE_HIV_MASK
);
6477 void intel_init_gt_powersave(struct drm_i915_private
*dev_priv
)
6480 * RPM depends on RC6 to save restore the GT HW context, so make RC6 a
6483 if (!i915
.enable_rc6
) {
6484 DRM_INFO("RC6 disabled, disabling runtime PM support\n");
6485 intel_runtime_pm_get(dev_priv
);
6488 mutex_lock(&dev_priv
->drm
.struct_mutex
);
6489 mutex_lock(&dev_priv
->rps
.hw_lock
);
6491 /* Initialize RPS limits (for userspace) */
6492 if (IS_CHERRYVIEW(dev_priv
))
6493 cherryview_init_gt_powersave(dev_priv
);
6494 else if (IS_VALLEYVIEW(dev_priv
))
6495 valleyview_init_gt_powersave(dev_priv
);
6496 else if (INTEL_GEN(dev_priv
) >= 6)
6497 gen6_init_rps_frequencies(dev_priv
);
6499 /* Derive initial user preferences/limits from the hardware limits */
6500 dev_priv
->rps
.idle_freq
= dev_priv
->rps
.min_freq
;
6501 dev_priv
->rps
.cur_freq
= dev_priv
->rps
.idle_freq
;
6503 dev_priv
->rps
.max_freq_softlimit
= dev_priv
->rps
.max_freq
;
6504 dev_priv
->rps
.min_freq_softlimit
= dev_priv
->rps
.min_freq
;
6506 if (IS_HASWELL(dev_priv
) || IS_BROADWELL(dev_priv
))
6507 dev_priv
->rps
.min_freq_softlimit
=
6509 dev_priv
->rps
.efficient_freq
,
6510 intel_freq_opcode(dev_priv
, 450));
6512 /* After setting max-softlimit, find the overclock max freq */
6513 if (IS_GEN6(dev_priv
) ||
6514 IS_IVYBRIDGE(dev_priv
) || IS_HASWELL(dev_priv
)) {
6517 sandybridge_pcode_read(dev_priv
, GEN6_READ_OC_PARAMS
, ¶ms
);
6518 if (params
& BIT(31)) { /* OC supported */
6519 DRM_DEBUG_DRIVER("Overclocking supported, max: %dMHz, overclock: %dMHz\n",
6520 (dev_priv
->rps
.max_freq
& 0xff) * 50,
6521 (params
& 0xff) * 50);
6522 dev_priv
->rps
.max_freq
= params
& 0xff;
6526 /* Finally allow us to boost to max by default */
6527 dev_priv
->rps
.boost_freq
= dev_priv
->rps
.max_freq
;
6529 mutex_unlock(&dev_priv
->rps
.hw_lock
);
6530 mutex_unlock(&dev_priv
->drm
.struct_mutex
);
6532 intel_autoenable_gt_powersave(dev_priv
);
6535 void intel_cleanup_gt_powersave(struct drm_i915_private
*dev_priv
)
6537 if (IS_VALLEYVIEW(dev_priv
))
6538 valleyview_cleanup_gt_powersave(dev_priv
);
6540 if (!i915
.enable_rc6
)
6541 intel_runtime_pm_put(dev_priv
);
6545 * intel_suspend_gt_powersave - suspend PM work and helper threads
6546 * @dev_priv: i915 device
6548 * We don't want to disable RC6 or other features here, we just want
6549 * to make sure any work we've queued has finished and won't bother
6550 * us while we're suspended.
6552 void intel_suspend_gt_powersave(struct drm_i915_private
*dev_priv
)
6554 if (INTEL_GEN(dev_priv
) < 6)
6557 if (cancel_delayed_work_sync(&dev_priv
->rps
.autoenable_work
))
6558 intel_runtime_pm_put(dev_priv
);
6560 /* gen6_rps_idle() will be called later to disable interrupts */
6563 void intel_sanitize_gt_powersave(struct drm_i915_private
*dev_priv
)
6565 dev_priv
->rps
.enabled
= true; /* force disabling */
6566 intel_disable_gt_powersave(dev_priv
);
6568 gen6_reset_rps_interrupts(dev_priv
);
6571 void intel_disable_gt_powersave(struct drm_i915_private
*dev_priv
)
6573 if (!READ_ONCE(dev_priv
->rps
.enabled
))
6576 mutex_lock(&dev_priv
->rps
.hw_lock
);
6578 if (INTEL_GEN(dev_priv
) >= 9) {
6579 gen9_disable_rc6(dev_priv
);
6580 gen9_disable_rps(dev_priv
);
6581 } else if (IS_CHERRYVIEW(dev_priv
)) {
6582 cherryview_disable_rps(dev_priv
);
6583 } else if (IS_VALLEYVIEW(dev_priv
)) {
6584 valleyview_disable_rps(dev_priv
);
6585 } else if (INTEL_GEN(dev_priv
) >= 6) {
6586 gen6_disable_rps(dev_priv
);
6587 } else if (IS_IRONLAKE_M(dev_priv
)) {
6588 ironlake_disable_drps(dev_priv
);
6591 dev_priv
->rps
.enabled
= false;
6592 mutex_unlock(&dev_priv
->rps
.hw_lock
);
6595 void intel_enable_gt_powersave(struct drm_i915_private
*dev_priv
)
6597 /* We shouldn't be disabling as we submit, so this should be less
6598 * racy than it appears!
6600 if (READ_ONCE(dev_priv
->rps
.enabled
))
6603 /* Powersaving is controlled by the host when inside a VM */
6604 if (intel_vgpu_active(dev_priv
))
6607 mutex_lock(&dev_priv
->rps
.hw_lock
);
6609 if (IS_CHERRYVIEW(dev_priv
)) {
6610 cherryview_enable_rps(dev_priv
);
6611 } else if (IS_VALLEYVIEW(dev_priv
)) {
6612 valleyview_enable_rps(dev_priv
);
6613 } else if (INTEL_GEN(dev_priv
) >= 9) {
6614 gen9_enable_rc6(dev_priv
);
6615 gen9_enable_rps(dev_priv
);
6616 if (IS_SKYLAKE(dev_priv
) || IS_KABYLAKE(dev_priv
))
6617 gen6_update_ring_freq(dev_priv
);
6618 } else if (IS_BROADWELL(dev_priv
)) {
6619 gen8_enable_rps(dev_priv
);
6620 gen6_update_ring_freq(dev_priv
);
6621 } else if (INTEL_GEN(dev_priv
) >= 6) {
6622 gen6_enable_rps(dev_priv
);
6623 gen6_update_ring_freq(dev_priv
);
6624 } else if (IS_IRONLAKE_M(dev_priv
)) {
6625 ironlake_enable_drps(dev_priv
);
6626 intel_init_emon(dev_priv
);
6629 WARN_ON(dev_priv
->rps
.max_freq
< dev_priv
->rps
.min_freq
);
6630 WARN_ON(dev_priv
->rps
.idle_freq
> dev_priv
->rps
.max_freq
);
6632 WARN_ON(dev_priv
->rps
.efficient_freq
< dev_priv
->rps
.min_freq
);
6633 WARN_ON(dev_priv
->rps
.efficient_freq
> dev_priv
->rps
.max_freq
);
6635 dev_priv
->rps
.enabled
= true;
6636 mutex_unlock(&dev_priv
->rps
.hw_lock
);
6639 static void __intel_autoenable_gt_powersave(struct work_struct
*work
)
6641 struct drm_i915_private
*dev_priv
=
6642 container_of(work
, typeof(*dev_priv
), rps
.autoenable_work
.work
);
6643 struct intel_engine_cs
*rcs
;
6644 struct drm_i915_gem_request
*req
;
6646 if (READ_ONCE(dev_priv
->rps
.enabled
))
6649 rcs
= &dev_priv
->engine
[RCS
];
6650 if (rcs
->last_context
)
6653 if (!rcs
->init_context
)
6656 mutex_lock(&dev_priv
->drm
.struct_mutex
);
6658 req
= i915_gem_request_alloc(rcs
, dev_priv
->kernel_context
);
6662 if (!i915
.enable_execlists
&& i915_switch_context(req
) == 0)
6663 rcs
->init_context(req
);
6665 /* Mark the device busy, calling intel_enable_gt_powersave() */
6666 i915_add_request_no_flush(req
);
6669 mutex_unlock(&dev_priv
->drm
.struct_mutex
);
6671 intel_runtime_pm_put(dev_priv
);
6674 void intel_autoenable_gt_powersave(struct drm_i915_private
*dev_priv
)
6676 if (READ_ONCE(dev_priv
->rps
.enabled
))
6679 if (IS_IRONLAKE_M(dev_priv
)) {
6680 ironlake_enable_drps(dev_priv
);
6681 mutex_lock(&dev_priv
->drm
.struct_mutex
);
6682 intel_init_emon(dev_priv
);
6683 mutex_unlock(&dev_priv
->drm
.struct_mutex
);
6684 } else if (INTEL_INFO(dev_priv
)->gen
>= 6) {
6686 * PCU communication is slow and this doesn't need to be
6687 * done at any specific time, so do this out of our fast path
6688 * to make resume and init faster.
6690 * We depend on the HW RC6 power context save/restore
6691 * mechanism when entering D3 through runtime PM suspend. So
6692 * disable RPM until RPS/RC6 is properly setup. We can only
6693 * get here via the driver load/system resume/runtime resume
6694 * paths, so the _noresume version is enough (and in case of
6695 * runtime resume it's necessary).
6697 if (queue_delayed_work(dev_priv
->wq
,
6698 &dev_priv
->rps
.autoenable_work
,
6699 round_jiffies_up_relative(HZ
)))
6700 intel_runtime_pm_get_noresume(dev_priv
);
6704 static void ibx_init_clock_gating(struct drm_device
*dev
)
6706 struct drm_i915_private
*dev_priv
= to_i915(dev
);
6709 * On Ibex Peak and Cougar Point, we need to disable clock
6710 * gating for the panel power sequencer or it will fail to
6711 * start up when no ports are active.
6713 I915_WRITE(SOUTH_DSPCLK_GATE_D
, PCH_DPLSUNIT_CLOCK_GATE_DISABLE
);
6716 static void g4x_disable_trickle_feed(struct drm_device
*dev
)
6718 struct drm_i915_private
*dev_priv
= to_i915(dev
);
6721 for_each_pipe(dev_priv
, pipe
) {
6722 I915_WRITE(DSPCNTR(pipe
),
6723 I915_READ(DSPCNTR(pipe
)) |
6724 DISPPLANE_TRICKLE_FEED_DISABLE
);
6726 I915_WRITE(DSPSURF(pipe
), I915_READ(DSPSURF(pipe
)));
6727 POSTING_READ(DSPSURF(pipe
));
6731 static void ilk_init_lp_watermarks(struct drm_device
*dev
)
6733 struct drm_i915_private
*dev_priv
= to_i915(dev
);
6735 I915_WRITE(WM3_LP_ILK
, I915_READ(WM3_LP_ILK
) & ~WM1_LP_SR_EN
);
6736 I915_WRITE(WM2_LP_ILK
, I915_READ(WM2_LP_ILK
) & ~WM1_LP_SR_EN
);
6737 I915_WRITE(WM1_LP_ILK
, I915_READ(WM1_LP_ILK
) & ~WM1_LP_SR_EN
);
6740 * Don't touch WM1S_LP_EN here.
6741 * Doing so could cause underruns.
6745 static void ironlake_init_clock_gating(struct drm_device
*dev
)
6747 struct drm_i915_private
*dev_priv
= to_i915(dev
);
6748 uint32_t dspclk_gate
= ILK_VRHUNIT_CLOCK_GATE_DISABLE
;
6752 * WaFbcDisableDpfcClockGating:ilk
6754 dspclk_gate
|= ILK_DPFCRUNIT_CLOCK_GATE_DISABLE
|
6755 ILK_DPFCUNIT_CLOCK_GATE_DISABLE
|
6756 ILK_DPFDUNIT_CLOCK_GATE_ENABLE
;
6758 I915_WRITE(PCH_3DCGDIS0
,
6759 MARIUNIT_CLOCK_GATE_DISABLE
|
6760 SVSMUNIT_CLOCK_GATE_DISABLE
);
6761 I915_WRITE(PCH_3DCGDIS1
,
6762 VFMUNIT_CLOCK_GATE_DISABLE
);
6765 * According to the spec the following bits should be set in
6766 * order to enable memory self-refresh
6767 * The bit 22/21 of 0x42004
6768 * The bit 5 of 0x42020
6769 * The bit 15 of 0x45000
6771 I915_WRITE(ILK_DISPLAY_CHICKEN2
,
6772 (I915_READ(ILK_DISPLAY_CHICKEN2
) |
6773 ILK_DPARB_GATE
| ILK_VSDPFD_FULL
));
6774 dspclk_gate
|= ILK_DPARBUNIT_CLOCK_GATE_ENABLE
;
6775 I915_WRITE(DISP_ARB_CTL
,
6776 (I915_READ(DISP_ARB_CTL
) |
6779 ilk_init_lp_watermarks(dev
);
6782 * Based on the document from hardware guys the following bits
6783 * should be set unconditionally in order to enable FBC.
6784 * The bit 22 of 0x42000
6785 * The bit 22 of 0x42004
6786 * The bit 7,8,9 of 0x42020.
6788 if (IS_IRONLAKE_M(dev
)) {
6789 /* WaFbcAsynchFlipDisableFbcQueue:ilk */
6790 I915_WRITE(ILK_DISPLAY_CHICKEN1
,
6791 I915_READ(ILK_DISPLAY_CHICKEN1
) |
6793 I915_WRITE(ILK_DISPLAY_CHICKEN2
,
6794 I915_READ(ILK_DISPLAY_CHICKEN2
) |
6798 I915_WRITE(ILK_DSPCLK_GATE_D
, dspclk_gate
);
6800 I915_WRITE(ILK_DISPLAY_CHICKEN2
,
6801 I915_READ(ILK_DISPLAY_CHICKEN2
) |
6802 ILK_ELPIN_409_SELECT
);
6803 I915_WRITE(_3D_CHICKEN2
,
6804 _3D_CHICKEN2_WM_READ_PIPELINED
<< 16 |
6805 _3D_CHICKEN2_WM_READ_PIPELINED
);
6807 /* WaDisableRenderCachePipelinedFlush:ilk */
6808 I915_WRITE(CACHE_MODE_0
,
6809 _MASKED_BIT_ENABLE(CM0_PIPELINED_RENDER_FLUSH_DISABLE
));
6811 /* WaDisable_RenderCache_OperationalFlush:ilk */
6812 I915_WRITE(CACHE_MODE_0
, _MASKED_BIT_DISABLE(RC_OP_FLUSH_ENABLE
));
6814 g4x_disable_trickle_feed(dev
);
6816 ibx_init_clock_gating(dev
);
6819 static void cpt_init_clock_gating(struct drm_device
*dev
)
6821 struct drm_i915_private
*dev_priv
= to_i915(dev
);
6826 * On Ibex Peak and Cougar Point, we need to disable clock
6827 * gating for the panel power sequencer or it will fail to
6828 * start up when no ports are active.
6830 I915_WRITE(SOUTH_DSPCLK_GATE_D
, PCH_DPLSUNIT_CLOCK_GATE_DISABLE
|
6831 PCH_DPLUNIT_CLOCK_GATE_DISABLE
|
6832 PCH_CPUNIT_CLOCK_GATE_DISABLE
);
6833 I915_WRITE(SOUTH_CHICKEN2
, I915_READ(SOUTH_CHICKEN2
) |
6834 DPLS_EDP_PPS_FIX_DIS
);
6835 /* The below fixes the weird display corruption, a few pixels shifted
6836 * downward, on (only) LVDS of some HP laptops with IVY.
6838 for_each_pipe(dev_priv
, pipe
) {
6839 val
= I915_READ(TRANS_CHICKEN2(pipe
));
6840 val
|= TRANS_CHICKEN2_TIMING_OVERRIDE
;
6841 val
&= ~TRANS_CHICKEN2_FDI_POLARITY_REVERSED
;
6842 if (dev_priv
->vbt
.fdi_rx_polarity_inverted
)
6843 val
|= TRANS_CHICKEN2_FDI_POLARITY_REVERSED
;
6844 val
&= ~TRANS_CHICKEN2_FRAME_START_DELAY_MASK
;
6845 val
&= ~TRANS_CHICKEN2_DISABLE_DEEP_COLOR_COUNTER
;
6846 val
&= ~TRANS_CHICKEN2_DISABLE_DEEP_COLOR_MODESWITCH
;
6847 I915_WRITE(TRANS_CHICKEN2(pipe
), val
);
6849 /* WADP0ClockGatingDisable */
6850 for_each_pipe(dev_priv
, pipe
) {
6851 I915_WRITE(TRANS_CHICKEN1(pipe
),
6852 TRANS_CHICKEN1_DP0UNIT_GC_DISABLE
);
6856 static void gen6_check_mch_setup(struct drm_device
*dev
)
6858 struct drm_i915_private
*dev_priv
= to_i915(dev
);
6861 tmp
= I915_READ(MCH_SSKPD
);
6862 if ((tmp
& MCH_SSKPD_WM0_MASK
) != MCH_SSKPD_WM0_VAL
)
6863 DRM_DEBUG_KMS("Wrong MCH_SSKPD value: 0x%08x This can cause underruns.\n",
6867 static void gen6_init_clock_gating(struct drm_device
*dev
)
6869 struct drm_i915_private
*dev_priv
= to_i915(dev
);
6870 uint32_t dspclk_gate
= ILK_VRHUNIT_CLOCK_GATE_DISABLE
;
6872 I915_WRITE(ILK_DSPCLK_GATE_D
, dspclk_gate
);
6874 I915_WRITE(ILK_DISPLAY_CHICKEN2
,
6875 I915_READ(ILK_DISPLAY_CHICKEN2
) |
6876 ILK_ELPIN_409_SELECT
);
6878 /* WaDisableHiZPlanesWhenMSAAEnabled:snb */
6879 I915_WRITE(_3D_CHICKEN
,
6880 _MASKED_BIT_ENABLE(_3D_CHICKEN_HIZ_PLANE_DISABLE_MSAA_4X_SNB
));
6882 /* WaDisable_RenderCache_OperationalFlush:snb */
6883 I915_WRITE(CACHE_MODE_0
, _MASKED_BIT_DISABLE(RC_OP_FLUSH_ENABLE
));
6886 * BSpec recoomends 8x4 when MSAA is used,
6887 * however in practice 16x4 seems fastest.
6889 * Note that PS/WM thread counts depend on the WIZ hashing
6890 * disable bit, which we don't touch here, but it's good
6891 * to keep in mind (see 3DSTATE_PS and 3DSTATE_WM).
6893 I915_WRITE(GEN6_GT_MODE
,
6894 _MASKED_FIELD(GEN6_WIZ_HASHING_MASK
, GEN6_WIZ_HASHING_16x4
));
6896 ilk_init_lp_watermarks(dev
);
6898 I915_WRITE(CACHE_MODE_0
,
6899 _MASKED_BIT_DISABLE(CM0_STC_EVICT_DISABLE_LRA_SNB
));
6901 I915_WRITE(GEN6_UCGCTL1
,
6902 I915_READ(GEN6_UCGCTL1
) |
6903 GEN6_BLBUNIT_CLOCK_GATE_DISABLE
|
6904 GEN6_CSUNIT_CLOCK_GATE_DISABLE
);
6906 /* According to the BSpec vol1g, bit 12 (RCPBUNIT) clock
6907 * gating disable must be set. Failure to set it results in
6908 * flickering pixels due to Z write ordering failures after
6909 * some amount of runtime in the Mesa "fire" demo, and Unigine
6910 * Sanctuary and Tropics, and apparently anything else with
6911 * alpha test or pixel discard.
6913 * According to the spec, bit 11 (RCCUNIT) must also be set,
6914 * but we didn't debug actual testcases to find it out.
6916 * WaDisableRCCUnitClockGating:snb
6917 * WaDisableRCPBUnitClockGating:snb
6919 I915_WRITE(GEN6_UCGCTL2
,
6920 GEN6_RCPBUNIT_CLOCK_GATE_DISABLE
|
6921 GEN6_RCCUNIT_CLOCK_GATE_DISABLE
);
6923 /* WaStripsFansDisableFastClipPerformanceFix:snb */
6924 I915_WRITE(_3D_CHICKEN3
,
6925 _MASKED_BIT_ENABLE(_3D_CHICKEN3_SF_DISABLE_FASTCLIP_CULL
));
6929 * "This bit must be set if 3DSTATE_CLIP clip mode is set to normal and
6930 * 3DSTATE_SF number of SF output attributes is more than 16."
6932 I915_WRITE(_3D_CHICKEN3
,
6933 _MASKED_BIT_ENABLE(_3D_CHICKEN3_SF_DISABLE_PIPELINED_ATTR_FETCH
));
6936 * According to the spec the following bits should be
6937 * set in order to enable memory self-refresh and fbc:
6938 * The bit21 and bit22 of 0x42000
6939 * The bit21 and bit22 of 0x42004
6940 * The bit5 and bit7 of 0x42020
6941 * The bit14 of 0x70180
6942 * The bit14 of 0x71180
6944 * WaFbcAsynchFlipDisableFbcQueue:snb
6946 I915_WRITE(ILK_DISPLAY_CHICKEN1
,
6947 I915_READ(ILK_DISPLAY_CHICKEN1
) |
6948 ILK_FBCQ_DIS
| ILK_PABSTRETCH_DIS
);
6949 I915_WRITE(ILK_DISPLAY_CHICKEN2
,
6950 I915_READ(ILK_DISPLAY_CHICKEN2
) |
6951 ILK_DPARB_GATE
| ILK_VSDPFD_FULL
);
6952 I915_WRITE(ILK_DSPCLK_GATE_D
,
6953 I915_READ(ILK_DSPCLK_GATE_D
) |
6954 ILK_DPARBUNIT_CLOCK_GATE_ENABLE
|
6955 ILK_DPFDUNIT_CLOCK_GATE_ENABLE
);
6957 g4x_disable_trickle_feed(dev
);
6959 cpt_init_clock_gating(dev
);
6961 gen6_check_mch_setup(dev
);
6964 static void gen7_setup_fixed_func_scheduler(struct drm_i915_private
*dev_priv
)
6966 uint32_t reg
= I915_READ(GEN7_FF_THREAD_MODE
);
6969 * WaVSThreadDispatchOverride:ivb,vlv
6971 * This actually overrides the dispatch
6972 * mode for all thread types.
6974 reg
&= ~GEN7_FF_SCHED_MASK
;
6975 reg
|= GEN7_FF_TS_SCHED_HW
;
6976 reg
|= GEN7_FF_VS_SCHED_HW
;
6977 reg
|= GEN7_FF_DS_SCHED_HW
;
6979 I915_WRITE(GEN7_FF_THREAD_MODE
, reg
);
6982 static void lpt_init_clock_gating(struct drm_device
*dev
)
6984 struct drm_i915_private
*dev_priv
= to_i915(dev
);
6987 * TODO: this bit should only be enabled when really needed, then
6988 * disabled when not needed anymore in order to save power.
6990 if (HAS_PCH_LPT_LP(dev
))
6991 I915_WRITE(SOUTH_DSPCLK_GATE_D
,
6992 I915_READ(SOUTH_DSPCLK_GATE_D
) |
6993 PCH_LP_PARTITION_LEVEL_DISABLE
);
6995 /* WADPOClockGatingDisable:hsw */
6996 I915_WRITE(TRANS_CHICKEN1(PIPE_A
),
6997 I915_READ(TRANS_CHICKEN1(PIPE_A
)) |
6998 TRANS_CHICKEN1_DP0UNIT_GC_DISABLE
);
7001 static void lpt_suspend_hw(struct drm_device
*dev
)
7003 struct drm_i915_private
*dev_priv
= to_i915(dev
);
7005 if (HAS_PCH_LPT_LP(dev
)) {
7006 uint32_t val
= I915_READ(SOUTH_DSPCLK_GATE_D
);
7008 val
&= ~PCH_LP_PARTITION_LEVEL_DISABLE
;
7009 I915_WRITE(SOUTH_DSPCLK_GATE_D
, val
);
7013 static void gen8_set_l3sqc_credits(struct drm_i915_private
*dev_priv
,
7014 int general_prio_credits
,
7015 int high_prio_credits
)
7019 /* WaTempDisableDOPClkGating:bdw */
7020 misccpctl
= I915_READ(GEN7_MISCCPCTL
);
7021 I915_WRITE(GEN7_MISCCPCTL
, misccpctl
& ~GEN7_DOP_CLOCK_GATE_ENABLE
);
7023 I915_WRITE(GEN8_L3SQCREG1
,
7024 L3_GENERAL_PRIO_CREDITS(general_prio_credits
) |
7025 L3_HIGH_PRIO_CREDITS(high_prio_credits
));
7028 * Wait at least 100 clocks before re-enabling clock gating.
7029 * See the definition of L3SQCREG1 in BSpec.
7031 POSTING_READ(GEN8_L3SQCREG1
);
7033 I915_WRITE(GEN7_MISCCPCTL
, misccpctl
);
7036 static void kabylake_init_clock_gating(struct drm_device
*dev
)
7038 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
7040 gen9_init_clock_gating(dev
);
7042 /* WaDisableSDEUnitClockGating:kbl */
7043 if (IS_KBL_REVID(dev_priv
, 0, KBL_REVID_B0
))
7044 I915_WRITE(GEN8_UCGCTL6
, I915_READ(GEN8_UCGCTL6
) |
7045 GEN8_SDEUNIT_CLOCK_GATE_DISABLE
);
7047 /* WaDisableGamClockGating:kbl */
7048 if (IS_KBL_REVID(dev_priv
, 0, KBL_REVID_B0
))
7049 I915_WRITE(GEN6_UCGCTL1
, I915_READ(GEN6_UCGCTL1
) |
7050 GEN6_GAMUNIT_CLOCK_GATE_DISABLE
);
7052 /* WaFbcNukeOnHostModify:kbl */
7053 I915_WRITE(ILK_DPFC_CHICKEN
, I915_READ(ILK_DPFC_CHICKEN
) |
7054 ILK_DPFC_NUKE_ON_ANY_MODIFICATION
);
7057 static void skylake_init_clock_gating(struct drm_device
*dev
)
7059 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
7061 gen9_init_clock_gating(dev
);
7063 /* WAC6entrylatency:skl */
7064 I915_WRITE(FBC_LLC_READ_CTRL
, I915_READ(FBC_LLC_READ_CTRL
) |
7065 FBC_LLC_FULLY_OPEN
);
7067 /* WaFbcNukeOnHostModify:skl */
7068 I915_WRITE(ILK_DPFC_CHICKEN
, I915_READ(ILK_DPFC_CHICKEN
) |
7069 ILK_DPFC_NUKE_ON_ANY_MODIFICATION
);
7072 static void broadwell_init_clock_gating(struct drm_device
*dev
)
7074 struct drm_i915_private
*dev_priv
= to_i915(dev
);
7077 ilk_init_lp_watermarks(dev
);
7079 /* WaSwitchSolVfFArbitrationPriority:bdw */
7080 I915_WRITE(GAM_ECOCHK
, I915_READ(GAM_ECOCHK
) | HSW_ECOCHK_ARB_PRIO_SOL
);
7082 /* WaPsrDPAMaskVBlankInSRD:bdw */
7083 I915_WRITE(CHICKEN_PAR1_1
,
7084 I915_READ(CHICKEN_PAR1_1
) | DPA_MASK_VBLANK_SRD
);
7086 /* WaPsrDPRSUnmaskVBlankInSRD:bdw */
7087 for_each_pipe(dev_priv
, pipe
) {
7088 I915_WRITE(CHICKEN_PIPESL_1(pipe
),
7089 I915_READ(CHICKEN_PIPESL_1(pipe
)) |
7090 BDW_DPRS_MASK_VBLANK_SRD
);
7093 /* WaVSRefCountFullforceMissDisable:bdw */
7094 /* WaDSRefCountFullforceMissDisable:bdw */
7095 I915_WRITE(GEN7_FF_THREAD_MODE
,
7096 I915_READ(GEN7_FF_THREAD_MODE
) &
7097 ~(GEN8_FF_DS_REF_CNT_FFME
| GEN7_FF_VS_REF_CNT_FFME
));
7099 I915_WRITE(GEN6_RC_SLEEP_PSMI_CONTROL
,
7100 _MASKED_BIT_ENABLE(GEN8_RC_SEMA_IDLE_MSG_DISABLE
));
7102 /* WaDisableSDEUnitClockGating:bdw */
7103 I915_WRITE(GEN8_UCGCTL6
, I915_READ(GEN8_UCGCTL6
) |
7104 GEN8_SDEUNIT_CLOCK_GATE_DISABLE
);
7106 /* WaProgramL3SqcReg1Default:bdw */
7107 gen8_set_l3sqc_credits(dev_priv
, 30, 2);
7110 * WaGttCachingOffByDefault:bdw
7111 * GTT cache may not work with big pages, so if those
7112 * are ever enabled GTT cache may need to be disabled.
7114 I915_WRITE(HSW_GTT_CACHE_EN
, GTT_CACHE_EN_ALL
);
7116 /* WaKVMNotificationOnConfigChange:bdw */
7117 I915_WRITE(CHICKEN_PAR2_1
, I915_READ(CHICKEN_PAR2_1
)
7118 | KVM_CONFIG_CHANGE_NOTIFICATION_SELECT
);
7120 lpt_init_clock_gating(dev
);
7123 static void haswell_init_clock_gating(struct drm_device
*dev
)
7125 struct drm_i915_private
*dev_priv
= to_i915(dev
);
7127 ilk_init_lp_watermarks(dev
);
7129 /* L3 caching of data atomics doesn't work -- disable it. */
7130 I915_WRITE(HSW_SCRATCH1
, HSW_SCRATCH1_L3_DATA_ATOMICS_DISABLE
);
7131 I915_WRITE(HSW_ROW_CHICKEN3
,
7132 _MASKED_BIT_ENABLE(HSW_ROW_CHICKEN3_L3_GLOBAL_ATOMICS_DISABLE
));
7134 /* This is required by WaCatErrorRejectionIssue:hsw */
7135 I915_WRITE(GEN7_SQ_CHICKEN_MBCUNIT_CONFIG
,
7136 I915_READ(GEN7_SQ_CHICKEN_MBCUNIT_CONFIG
) |
7137 GEN7_SQ_CHICKEN_MBCUNIT_SQINTMOB
);
7139 /* WaVSRefCountFullforceMissDisable:hsw */
7140 I915_WRITE(GEN7_FF_THREAD_MODE
,
7141 I915_READ(GEN7_FF_THREAD_MODE
) & ~GEN7_FF_VS_REF_CNT_FFME
);
7143 /* WaDisable_RenderCache_OperationalFlush:hsw */
7144 I915_WRITE(CACHE_MODE_0_GEN7
, _MASKED_BIT_DISABLE(RC_OP_FLUSH_ENABLE
));
7146 /* enable HiZ Raw Stall Optimization */
7147 I915_WRITE(CACHE_MODE_0_GEN7
,
7148 _MASKED_BIT_DISABLE(HIZ_RAW_STALL_OPT_DISABLE
));
7150 /* WaDisable4x2SubspanOptimization:hsw */
7151 I915_WRITE(CACHE_MODE_1
,
7152 _MASKED_BIT_ENABLE(PIXEL_SUBSPAN_COLLECT_OPT_DISABLE
));
7155 * BSpec recommends 8x4 when MSAA is used,
7156 * however in practice 16x4 seems fastest.
7158 * Note that PS/WM thread counts depend on the WIZ hashing
7159 * disable bit, which we don't touch here, but it's good
7160 * to keep in mind (see 3DSTATE_PS and 3DSTATE_WM).
7162 I915_WRITE(GEN7_GT_MODE
,
7163 _MASKED_FIELD(GEN6_WIZ_HASHING_MASK
, GEN6_WIZ_HASHING_16x4
));
7165 /* WaSampleCChickenBitEnable:hsw */
7166 I915_WRITE(HALF_SLICE_CHICKEN3
,
7167 _MASKED_BIT_ENABLE(HSW_SAMPLE_C_PERFORMANCE
));
7169 /* WaSwitchSolVfFArbitrationPriority:hsw */
7170 I915_WRITE(GAM_ECOCHK
, I915_READ(GAM_ECOCHK
) | HSW_ECOCHK_ARB_PRIO_SOL
);
7172 /* WaRsPkgCStateDisplayPMReq:hsw */
7173 I915_WRITE(CHICKEN_PAR1_1
,
7174 I915_READ(CHICKEN_PAR1_1
) | FORCE_ARB_IDLE_PLANES
);
7176 lpt_init_clock_gating(dev
);
7179 static void ivybridge_init_clock_gating(struct drm_device
*dev
)
7181 struct drm_i915_private
*dev_priv
= to_i915(dev
);
7184 ilk_init_lp_watermarks(dev
);
7186 I915_WRITE(ILK_DSPCLK_GATE_D
, ILK_VRHUNIT_CLOCK_GATE_DISABLE
);
7188 /* WaDisableEarlyCull:ivb */
7189 I915_WRITE(_3D_CHICKEN3
,
7190 _MASKED_BIT_ENABLE(_3D_CHICKEN_SF_DISABLE_OBJEND_CULL
));
7192 /* WaDisableBackToBackFlipFix:ivb */
7193 I915_WRITE(IVB_CHICKEN3
,
7194 CHICKEN3_DGMG_REQ_OUT_FIX_DISABLE
|
7195 CHICKEN3_DGMG_DONE_FIX_DISABLE
);
7197 /* WaDisablePSDDualDispatchEnable:ivb */
7198 if (IS_IVB_GT1(dev
))
7199 I915_WRITE(GEN7_HALF_SLICE_CHICKEN1
,
7200 _MASKED_BIT_ENABLE(GEN7_PSD_SINGLE_PORT_DISPATCH_ENABLE
));
7202 /* WaDisable_RenderCache_OperationalFlush:ivb */
7203 I915_WRITE(CACHE_MODE_0_GEN7
, _MASKED_BIT_DISABLE(RC_OP_FLUSH_ENABLE
));
7205 /* Apply the WaDisableRHWOOptimizationForRenderHang:ivb workaround. */
7206 I915_WRITE(GEN7_COMMON_SLICE_CHICKEN1
,
7207 GEN7_CSC1_RHWO_OPT_DISABLE_IN_RCC
);
7209 /* WaApplyL3ControlAndL3ChickenMode:ivb */
7210 I915_WRITE(GEN7_L3CNTLREG1
,
7211 GEN7_WA_FOR_GEN7_L3_CONTROL
);
7212 I915_WRITE(GEN7_L3_CHICKEN_MODE_REGISTER
,
7213 GEN7_WA_L3_CHICKEN_MODE
);
7214 if (IS_IVB_GT1(dev
))
7215 I915_WRITE(GEN7_ROW_CHICKEN2
,
7216 _MASKED_BIT_ENABLE(DOP_CLOCK_GATING_DISABLE
));
7218 /* must write both registers */
7219 I915_WRITE(GEN7_ROW_CHICKEN2
,
7220 _MASKED_BIT_ENABLE(DOP_CLOCK_GATING_DISABLE
));
7221 I915_WRITE(GEN7_ROW_CHICKEN2_GT2
,
7222 _MASKED_BIT_ENABLE(DOP_CLOCK_GATING_DISABLE
));
7225 /* WaForceL3Serialization:ivb */
7226 I915_WRITE(GEN7_L3SQCREG4
, I915_READ(GEN7_L3SQCREG4
) &
7227 ~L3SQ_URB_READ_CAM_MATCH_DISABLE
);
7230 * According to the spec, bit 13 (RCZUNIT) must be set on IVB.
7231 * This implements the WaDisableRCZUnitClockGating:ivb workaround.
7233 I915_WRITE(GEN6_UCGCTL2
,
7234 GEN6_RCZUNIT_CLOCK_GATE_DISABLE
);
7236 /* This is required by WaCatErrorRejectionIssue:ivb */
7237 I915_WRITE(GEN7_SQ_CHICKEN_MBCUNIT_CONFIG
,
7238 I915_READ(GEN7_SQ_CHICKEN_MBCUNIT_CONFIG
) |
7239 GEN7_SQ_CHICKEN_MBCUNIT_SQINTMOB
);
7241 g4x_disable_trickle_feed(dev
);
7243 gen7_setup_fixed_func_scheduler(dev_priv
);
7245 if (0) { /* causes HiZ corruption on ivb:gt1 */
7246 /* enable HiZ Raw Stall Optimization */
7247 I915_WRITE(CACHE_MODE_0_GEN7
,
7248 _MASKED_BIT_DISABLE(HIZ_RAW_STALL_OPT_DISABLE
));
7251 /* WaDisable4x2SubspanOptimization:ivb */
7252 I915_WRITE(CACHE_MODE_1
,
7253 _MASKED_BIT_ENABLE(PIXEL_SUBSPAN_COLLECT_OPT_DISABLE
));
7256 * BSpec recommends 8x4 when MSAA is used,
7257 * however in practice 16x4 seems fastest.
7259 * Note that PS/WM thread counts depend on the WIZ hashing
7260 * disable bit, which we don't touch here, but it's good
7261 * to keep in mind (see 3DSTATE_PS and 3DSTATE_WM).
7263 I915_WRITE(GEN7_GT_MODE
,
7264 _MASKED_FIELD(GEN6_WIZ_HASHING_MASK
, GEN6_WIZ_HASHING_16x4
));
7266 snpcr
= I915_READ(GEN6_MBCUNIT_SNPCR
);
7267 snpcr
&= ~GEN6_MBC_SNPCR_MASK
;
7268 snpcr
|= GEN6_MBC_SNPCR_MED
;
7269 I915_WRITE(GEN6_MBCUNIT_SNPCR
, snpcr
);
7271 if (!HAS_PCH_NOP(dev
))
7272 cpt_init_clock_gating(dev
);
7274 gen6_check_mch_setup(dev
);
7277 static void valleyview_init_clock_gating(struct drm_device
*dev
)
7279 struct drm_i915_private
*dev_priv
= to_i915(dev
);
7281 /* WaDisableEarlyCull:vlv */
7282 I915_WRITE(_3D_CHICKEN3
,
7283 _MASKED_BIT_ENABLE(_3D_CHICKEN_SF_DISABLE_OBJEND_CULL
));
7285 /* WaDisableBackToBackFlipFix:vlv */
7286 I915_WRITE(IVB_CHICKEN3
,
7287 CHICKEN3_DGMG_REQ_OUT_FIX_DISABLE
|
7288 CHICKEN3_DGMG_DONE_FIX_DISABLE
);
7290 /* WaPsdDispatchEnable:vlv */
7291 /* WaDisablePSDDualDispatchEnable:vlv */
7292 I915_WRITE(GEN7_HALF_SLICE_CHICKEN1
,
7293 _MASKED_BIT_ENABLE(GEN7_MAX_PS_THREAD_DEP
|
7294 GEN7_PSD_SINGLE_PORT_DISPATCH_ENABLE
));
7296 /* WaDisable_RenderCache_OperationalFlush:vlv */
7297 I915_WRITE(CACHE_MODE_0_GEN7
, _MASKED_BIT_DISABLE(RC_OP_FLUSH_ENABLE
));
7299 /* WaForceL3Serialization:vlv */
7300 I915_WRITE(GEN7_L3SQCREG4
, I915_READ(GEN7_L3SQCREG4
) &
7301 ~L3SQ_URB_READ_CAM_MATCH_DISABLE
);
7303 /* WaDisableDopClockGating:vlv */
7304 I915_WRITE(GEN7_ROW_CHICKEN2
,
7305 _MASKED_BIT_ENABLE(DOP_CLOCK_GATING_DISABLE
));
7307 /* This is required by WaCatErrorRejectionIssue:vlv */
7308 I915_WRITE(GEN7_SQ_CHICKEN_MBCUNIT_CONFIG
,
7309 I915_READ(GEN7_SQ_CHICKEN_MBCUNIT_CONFIG
) |
7310 GEN7_SQ_CHICKEN_MBCUNIT_SQINTMOB
);
7312 gen7_setup_fixed_func_scheduler(dev_priv
);
7315 * According to the spec, bit 13 (RCZUNIT) must be set on IVB.
7316 * This implements the WaDisableRCZUnitClockGating:vlv workaround.
7318 I915_WRITE(GEN6_UCGCTL2
,
7319 GEN6_RCZUNIT_CLOCK_GATE_DISABLE
);
7321 /* WaDisableL3Bank2xClockGate:vlv
7322 * Disabling L3 clock gating- MMIO 940c[25] = 1
7323 * Set bit 25, to disable L3_BANK_2x_CLK_GATING */
7324 I915_WRITE(GEN7_UCGCTL4
,
7325 I915_READ(GEN7_UCGCTL4
) | GEN7_L3BANK2X_CLOCK_GATE_DISABLE
);
7328 * BSpec says this must be set, even though
7329 * WaDisable4x2SubspanOptimization isn't listed for VLV.
7331 I915_WRITE(CACHE_MODE_1
,
7332 _MASKED_BIT_ENABLE(PIXEL_SUBSPAN_COLLECT_OPT_DISABLE
));
7335 * BSpec recommends 8x4 when MSAA is used,
7336 * however in practice 16x4 seems fastest.
7338 * Note that PS/WM thread counts depend on the WIZ hashing
7339 * disable bit, which we don't touch here, but it's good
7340 * to keep in mind (see 3DSTATE_PS and 3DSTATE_WM).
7342 I915_WRITE(GEN7_GT_MODE
,
7343 _MASKED_FIELD(GEN6_WIZ_HASHING_MASK
, GEN6_WIZ_HASHING_16x4
));
7346 * WaIncreaseL3CreditsForVLVB0:vlv
7347 * This is the hardware default actually.
7349 I915_WRITE(GEN7_L3SQCREG1
, VLV_B0_WA_L3SQCREG1_VALUE
);
7352 * WaDisableVLVClockGating_VBIIssue:vlv
7353 * Disable clock gating on th GCFG unit to prevent a delay
7354 * in the reporting of vblank events.
7356 I915_WRITE(VLV_GUNIT_CLOCK_GATE
, GCFG_DIS
);
7359 static void cherryview_init_clock_gating(struct drm_device
*dev
)
7361 struct drm_i915_private
*dev_priv
= to_i915(dev
);
7363 /* WaVSRefCountFullforceMissDisable:chv */
7364 /* WaDSRefCountFullforceMissDisable:chv */
7365 I915_WRITE(GEN7_FF_THREAD_MODE
,
7366 I915_READ(GEN7_FF_THREAD_MODE
) &
7367 ~(GEN8_FF_DS_REF_CNT_FFME
| GEN7_FF_VS_REF_CNT_FFME
));
7369 /* WaDisableSemaphoreAndSyncFlipWait:chv */
7370 I915_WRITE(GEN6_RC_SLEEP_PSMI_CONTROL
,
7371 _MASKED_BIT_ENABLE(GEN8_RC_SEMA_IDLE_MSG_DISABLE
));
7373 /* WaDisableCSUnitClockGating:chv */
7374 I915_WRITE(GEN6_UCGCTL1
, I915_READ(GEN6_UCGCTL1
) |
7375 GEN6_CSUNIT_CLOCK_GATE_DISABLE
);
7377 /* WaDisableSDEUnitClockGating:chv */
7378 I915_WRITE(GEN8_UCGCTL6
, I915_READ(GEN8_UCGCTL6
) |
7379 GEN8_SDEUNIT_CLOCK_GATE_DISABLE
);
7382 * WaProgramL3SqcReg1Default:chv
7383 * See gfxspecs/Related Documents/Performance Guide/
7384 * LSQC Setting Recommendations.
7386 gen8_set_l3sqc_credits(dev_priv
, 38, 2);
7389 * GTT cache may not work with big pages, so if those
7390 * are ever enabled GTT cache may need to be disabled.
7392 I915_WRITE(HSW_GTT_CACHE_EN
, GTT_CACHE_EN_ALL
);
7395 static void g4x_init_clock_gating(struct drm_device
*dev
)
7397 struct drm_i915_private
*dev_priv
= to_i915(dev
);
7398 uint32_t dspclk_gate
;
7400 I915_WRITE(RENCLK_GATE_D1
, 0);
7401 I915_WRITE(RENCLK_GATE_D2
, VF_UNIT_CLOCK_GATE_DISABLE
|
7402 GS_UNIT_CLOCK_GATE_DISABLE
|
7403 CL_UNIT_CLOCK_GATE_DISABLE
);
7404 I915_WRITE(RAMCLK_GATE_D
, 0);
7405 dspclk_gate
= VRHUNIT_CLOCK_GATE_DISABLE
|
7406 OVRUNIT_CLOCK_GATE_DISABLE
|
7407 OVCUNIT_CLOCK_GATE_DISABLE
;
7409 dspclk_gate
|= DSSUNIT_CLOCK_GATE_DISABLE
;
7410 I915_WRITE(DSPCLK_GATE_D
, dspclk_gate
);
7412 /* WaDisableRenderCachePipelinedFlush */
7413 I915_WRITE(CACHE_MODE_0
,
7414 _MASKED_BIT_ENABLE(CM0_PIPELINED_RENDER_FLUSH_DISABLE
));
7416 /* WaDisable_RenderCache_OperationalFlush:g4x */
7417 I915_WRITE(CACHE_MODE_0
, _MASKED_BIT_DISABLE(RC_OP_FLUSH_ENABLE
));
7419 g4x_disable_trickle_feed(dev
);
7422 static void crestline_init_clock_gating(struct drm_device
*dev
)
7424 struct drm_i915_private
*dev_priv
= to_i915(dev
);
7426 I915_WRITE(RENCLK_GATE_D1
, I965_RCC_CLOCK_GATE_DISABLE
);
7427 I915_WRITE(RENCLK_GATE_D2
, 0);
7428 I915_WRITE(DSPCLK_GATE_D
, 0);
7429 I915_WRITE(RAMCLK_GATE_D
, 0);
7430 I915_WRITE16(DEUC
, 0);
7431 I915_WRITE(MI_ARB_STATE
,
7432 _MASKED_BIT_ENABLE(MI_ARB_DISPLAY_TRICKLE_FEED_DISABLE
));
7434 /* WaDisable_RenderCache_OperationalFlush:gen4 */
7435 I915_WRITE(CACHE_MODE_0
, _MASKED_BIT_DISABLE(RC_OP_FLUSH_ENABLE
));
7438 static void broadwater_init_clock_gating(struct drm_device
*dev
)
7440 struct drm_i915_private
*dev_priv
= to_i915(dev
);
7442 I915_WRITE(RENCLK_GATE_D1
, I965_RCZ_CLOCK_GATE_DISABLE
|
7443 I965_RCC_CLOCK_GATE_DISABLE
|
7444 I965_RCPB_CLOCK_GATE_DISABLE
|
7445 I965_ISC_CLOCK_GATE_DISABLE
|
7446 I965_FBC_CLOCK_GATE_DISABLE
);
7447 I915_WRITE(RENCLK_GATE_D2
, 0);
7448 I915_WRITE(MI_ARB_STATE
,
7449 _MASKED_BIT_ENABLE(MI_ARB_DISPLAY_TRICKLE_FEED_DISABLE
));
7451 /* WaDisable_RenderCache_OperationalFlush:gen4 */
7452 I915_WRITE(CACHE_MODE_0
, _MASKED_BIT_DISABLE(RC_OP_FLUSH_ENABLE
));
7455 static void gen3_init_clock_gating(struct drm_device
*dev
)
7457 struct drm_i915_private
*dev_priv
= to_i915(dev
);
7458 u32 dstate
= I915_READ(D_STATE
);
7460 dstate
|= DSTATE_PLL_D3_OFF
| DSTATE_GFX_CLOCK_GATING
|
7461 DSTATE_DOT_CLOCK_GATING
;
7462 I915_WRITE(D_STATE
, dstate
);
7464 if (IS_PINEVIEW(dev
))
7465 I915_WRITE(ECOSKPD
, _MASKED_BIT_ENABLE(ECO_GATING_CX_ONLY
));
7467 /* IIR "flip pending" means done if this bit is set */
7468 I915_WRITE(ECOSKPD
, _MASKED_BIT_DISABLE(ECO_FLIP_DONE
));
7470 /* interrupts should cause a wake up from C3 */
7471 I915_WRITE(INSTPM
, _MASKED_BIT_ENABLE(INSTPM_AGPBUSY_INT_EN
));
7473 /* On GEN3 we really need to make sure the ARB C3 LP bit is set */
7474 I915_WRITE(MI_ARB_STATE
, _MASKED_BIT_ENABLE(MI_ARB_C3_LP_WRITE_ENABLE
));
7476 I915_WRITE(MI_ARB_STATE
,
7477 _MASKED_BIT_ENABLE(MI_ARB_DISPLAY_TRICKLE_FEED_DISABLE
));
7480 static void i85x_init_clock_gating(struct drm_device
*dev
)
7482 struct drm_i915_private
*dev_priv
= to_i915(dev
);
7484 I915_WRITE(RENCLK_GATE_D1
, SV_CLOCK_GATE_DISABLE
);
7486 /* interrupts should cause a wake up from C3 */
7487 I915_WRITE(MI_STATE
, _MASKED_BIT_ENABLE(MI_AGPBUSY_INT_EN
) |
7488 _MASKED_BIT_DISABLE(MI_AGPBUSY_830_MODE
));
7490 I915_WRITE(MEM_MODE
,
7491 _MASKED_BIT_ENABLE(MEM_DISPLAY_TRICKLE_FEED_DISABLE
));
7494 static void i830_init_clock_gating(struct drm_device
*dev
)
7496 struct drm_i915_private
*dev_priv
= to_i915(dev
);
7498 I915_WRITE(DSPCLK_GATE_D
, OVRUNIT_CLOCK_GATE_DISABLE
);
7500 I915_WRITE(MEM_MODE
,
7501 _MASKED_BIT_ENABLE(MEM_DISPLAY_A_TRICKLE_FEED_DISABLE
) |
7502 _MASKED_BIT_ENABLE(MEM_DISPLAY_B_TRICKLE_FEED_DISABLE
));
7505 void intel_init_clock_gating(struct drm_device
*dev
)
7507 struct drm_i915_private
*dev_priv
= to_i915(dev
);
7509 dev_priv
->display
.init_clock_gating(dev
);
7512 void intel_suspend_hw(struct drm_device
*dev
)
7514 if (HAS_PCH_LPT(dev
))
7515 lpt_suspend_hw(dev
);
7518 static void nop_init_clock_gating(struct drm_device
*dev
)
7520 DRM_DEBUG_KMS("No clock gating settings or workarounds applied.\n");
7524 * intel_init_clock_gating_hooks - setup the clock gating hooks
7525 * @dev_priv: device private
7527 * Setup the hooks that configure which clocks of a given platform can be
7528 * gated and also apply various GT and display specific workarounds for these
7529 * platforms. Note that some GT specific workarounds are applied separately
7530 * when GPU contexts or batchbuffers start their execution.
7532 void intel_init_clock_gating_hooks(struct drm_i915_private
*dev_priv
)
7534 if (IS_SKYLAKE(dev_priv
))
7535 dev_priv
->display
.init_clock_gating
= skylake_init_clock_gating
;
7536 else if (IS_KABYLAKE(dev_priv
))
7537 dev_priv
->display
.init_clock_gating
= kabylake_init_clock_gating
;
7538 else if (IS_BROXTON(dev_priv
))
7539 dev_priv
->display
.init_clock_gating
= bxt_init_clock_gating
;
7540 else if (IS_BROADWELL(dev_priv
))
7541 dev_priv
->display
.init_clock_gating
= broadwell_init_clock_gating
;
7542 else if (IS_CHERRYVIEW(dev_priv
))
7543 dev_priv
->display
.init_clock_gating
= cherryview_init_clock_gating
;
7544 else if (IS_HASWELL(dev_priv
))
7545 dev_priv
->display
.init_clock_gating
= haswell_init_clock_gating
;
7546 else if (IS_IVYBRIDGE(dev_priv
))
7547 dev_priv
->display
.init_clock_gating
= ivybridge_init_clock_gating
;
7548 else if (IS_VALLEYVIEW(dev_priv
))
7549 dev_priv
->display
.init_clock_gating
= valleyview_init_clock_gating
;
7550 else if (IS_GEN6(dev_priv
))
7551 dev_priv
->display
.init_clock_gating
= gen6_init_clock_gating
;
7552 else if (IS_GEN5(dev_priv
))
7553 dev_priv
->display
.init_clock_gating
= ironlake_init_clock_gating
;
7554 else if (IS_G4X(dev_priv
))
7555 dev_priv
->display
.init_clock_gating
= g4x_init_clock_gating
;
7556 else if (IS_CRESTLINE(dev_priv
))
7557 dev_priv
->display
.init_clock_gating
= crestline_init_clock_gating
;
7558 else if (IS_BROADWATER(dev_priv
))
7559 dev_priv
->display
.init_clock_gating
= broadwater_init_clock_gating
;
7560 else if (IS_GEN3(dev_priv
))
7561 dev_priv
->display
.init_clock_gating
= gen3_init_clock_gating
;
7562 else if (IS_I85X(dev_priv
) || IS_I865G(dev_priv
))
7563 dev_priv
->display
.init_clock_gating
= i85x_init_clock_gating
;
7564 else if (IS_GEN2(dev_priv
))
7565 dev_priv
->display
.init_clock_gating
= i830_init_clock_gating
;
7567 MISSING_CASE(INTEL_DEVID(dev_priv
));
7568 dev_priv
->display
.init_clock_gating
= nop_init_clock_gating
;
7572 /* Set up chip specific power management-related functions */
7573 void intel_init_pm(struct drm_device
*dev
)
7575 struct drm_i915_private
*dev_priv
= to_i915(dev
);
7577 intel_fbc_init(dev_priv
);
7580 if (IS_PINEVIEW(dev
))
7581 i915_pineview_get_mem_freq(dev
);
7582 else if (IS_GEN5(dev
))
7583 i915_ironlake_get_mem_freq(dev
);
7585 /* For FIFO watermark updates */
7586 if (INTEL_INFO(dev
)->gen
>= 9) {
7587 skl_setup_wm_latency(dev
);
7588 dev_priv
->display
.update_wm
= skl_update_wm
;
7589 dev_priv
->display
.compute_global_watermarks
= skl_compute_wm
;
7590 } else if (HAS_PCH_SPLIT(dev
)) {
7591 ilk_setup_wm_latency(dev
);
7593 if ((IS_GEN5(dev
) && dev_priv
->wm
.pri_latency
[1] &&
7594 dev_priv
->wm
.spr_latency
[1] && dev_priv
->wm
.cur_latency
[1]) ||
7595 (!IS_GEN5(dev
) && dev_priv
->wm
.pri_latency
[0] &&
7596 dev_priv
->wm
.spr_latency
[0] && dev_priv
->wm
.cur_latency
[0])) {
7597 dev_priv
->display
.compute_pipe_wm
= ilk_compute_pipe_wm
;
7598 dev_priv
->display
.compute_intermediate_wm
=
7599 ilk_compute_intermediate_wm
;
7600 dev_priv
->display
.initial_watermarks
=
7601 ilk_initial_watermarks
;
7602 dev_priv
->display
.optimize_watermarks
=
7603 ilk_optimize_watermarks
;
7605 DRM_DEBUG_KMS("Failed to read display plane latency. "
7608 } else if (IS_CHERRYVIEW(dev
)) {
7609 vlv_setup_wm_latency(dev
);
7610 dev_priv
->display
.update_wm
= vlv_update_wm
;
7611 } else if (IS_VALLEYVIEW(dev
)) {
7612 vlv_setup_wm_latency(dev
);
7613 dev_priv
->display
.update_wm
= vlv_update_wm
;
7614 } else if (IS_PINEVIEW(dev
)) {
7615 if (!intel_get_cxsr_latency(IS_PINEVIEW_G(dev
),
7618 dev_priv
->mem_freq
)) {
7619 DRM_INFO("failed to find known CxSR latency "
7620 "(found ddr%s fsb freq %d, mem freq %d), "
7622 (dev_priv
->is_ddr3
== 1) ? "3" : "2",
7623 dev_priv
->fsb_freq
, dev_priv
->mem_freq
);
7624 /* Disable CxSR and never update its watermark again */
7625 intel_set_memory_cxsr(dev_priv
, false);
7626 dev_priv
->display
.update_wm
= NULL
;
7628 dev_priv
->display
.update_wm
= pineview_update_wm
;
7629 } else if (IS_G4X(dev
)) {
7630 dev_priv
->display
.update_wm
= g4x_update_wm
;
7631 } else if (IS_GEN4(dev
)) {
7632 dev_priv
->display
.update_wm
= i965_update_wm
;
7633 } else if (IS_GEN3(dev
)) {
7634 dev_priv
->display
.update_wm
= i9xx_update_wm
;
7635 dev_priv
->display
.get_fifo_size
= i9xx_get_fifo_size
;
7636 } else if (IS_GEN2(dev
)) {
7637 if (INTEL_INFO(dev
)->num_pipes
== 1) {
7638 dev_priv
->display
.update_wm
= i845_update_wm
;
7639 dev_priv
->display
.get_fifo_size
= i845_get_fifo_size
;
7641 dev_priv
->display
.update_wm
= i9xx_update_wm
;
7642 dev_priv
->display
.get_fifo_size
= i830_get_fifo_size
;
7645 DRM_ERROR("unexpected fall-through in intel_init_pm\n");
7649 int sandybridge_pcode_read(struct drm_i915_private
*dev_priv
, u32 mbox
, u32
*val
)
7651 WARN_ON(!mutex_is_locked(&dev_priv
->rps
.hw_lock
));
7653 /* GEN6_PCODE_* are outside of the forcewake domain, we can
7654 * use te fw I915_READ variants to reduce the amount of work
7655 * required when reading/writing.
7658 if (I915_READ_FW(GEN6_PCODE_MAILBOX
) & GEN6_PCODE_READY
) {
7659 DRM_DEBUG_DRIVER("warning: pcode (read) mailbox access failed\n");
7663 I915_WRITE_FW(GEN6_PCODE_DATA
, *val
);
7664 I915_WRITE_FW(GEN6_PCODE_DATA1
, 0);
7665 I915_WRITE_FW(GEN6_PCODE_MAILBOX
, GEN6_PCODE_READY
| mbox
);
7667 if (intel_wait_for_register_fw(dev_priv
,
7668 GEN6_PCODE_MAILBOX
, GEN6_PCODE_READY
, 0,
7670 DRM_ERROR("timeout waiting for pcode read (%d) to finish\n", mbox
);
7674 *val
= I915_READ_FW(GEN6_PCODE_DATA
);
7675 I915_WRITE_FW(GEN6_PCODE_DATA
, 0);
7680 int sandybridge_pcode_write(struct drm_i915_private
*dev_priv
,
7683 WARN_ON(!mutex_is_locked(&dev_priv
->rps
.hw_lock
));
7685 /* GEN6_PCODE_* are outside of the forcewake domain, we can
7686 * use te fw I915_READ variants to reduce the amount of work
7687 * required when reading/writing.
7690 if (I915_READ_FW(GEN6_PCODE_MAILBOX
) & GEN6_PCODE_READY
) {
7691 DRM_DEBUG_DRIVER("warning: pcode (write) mailbox access failed\n");
7695 I915_WRITE_FW(GEN6_PCODE_DATA
, val
);
7696 I915_WRITE_FW(GEN6_PCODE_MAILBOX
, GEN6_PCODE_READY
| mbox
);
7698 if (intel_wait_for_register_fw(dev_priv
,
7699 GEN6_PCODE_MAILBOX
, GEN6_PCODE_READY
, 0,
7701 DRM_ERROR("timeout waiting for pcode write (%d) to finish\n", mbox
);
7705 I915_WRITE_FW(GEN6_PCODE_DATA
, 0);
7710 static int byt_gpu_freq(struct drm_i915_private
*dev_priv
, int val
)
7714 * Slow = Fast = GPLL ref * N
7716 return DIV_ROUND_CLOSEST(dev_priv
->rps
.gpll_ref_freq
* (val
- 0xb7), 1000);
7719 static int byt_freq_opcode(struct drm_i915_private
*dev_priv
, int val
)
7721 return DIV_ROUND_CLOSEST(1000 * val
, dev_priv
->rps
.gpll_ref_freq
) + 0xb7;
7724 static int chv_gpu_freq(struct drm_i915_private
*dev_priv
, int val
)
7728 * CU (slow) = CU2x (fast) / 2 = GPLL ref * N / 2
7730 return DIV_ROUND_CLOSEST(dev_priv
->rps
.gpll_ref_freq
* val
, 2 * 2 * 1000);
7733 static int chv_freq_opcode(struct drm_i915_private
*dev_priv
, int val
)
7735 /* CHV needs even values */
7736 return DIV_ROUND_CLOSEST(2 * 1000 * val
, dev_priv
->rps
.gpll_ref_freq
) * 2;
7739 int intel_gpu_freq(struct drm_i915_private
*dev_priv
, int val
)
7741 if (IS_GEN9(dev_priv
))
7742 return DIV_ROUND_CLOSEST(val
* GT_FREQUENCY_MULTIPLIER
,
7744 else if (IS_CHERRYVIEW(dev_priv
))
7745 return chv_gpu_freq(dev_priv
, val
);
7746 else if (IS_VALLEYVIEW(dev_priv
))
7747 return byt_gpu_freq(dev_priv
, val
);
7749 return val
* GT_FREQUENCY_MULTIPLIER
;
7752 int intel_freq_opcode(struct drm_i915_private
*dev_priv
, int val
)
7754 if (IS_GEN9(dev_priv
))
7755 return DIV_ROUND_CLOSEST(val
* GEN9_FREQ_SCALER
,
7756 GT_FREQUENCY_MULTIPLIER
);
7757 else if (IS_CHERRYVIEW(dev_priv
))
7758 return chv_freq_opcode(dev_priv
, val
);
7759 else if (IS_VALLEYVIEW(dev_priv
))
7760 return byt_freq_opcode(dev_priv
, val
);
7762 return DIV_ROUND_CLOSEST(val
, GT_FREQUENCY_MULTIPLIER
);
7765 struct request_boost
{
7766 struct work_struct work
;
7767 struct drm_i915_gem_request
*req
;
7770 static void __intel_rps_boost_work(struct work_struct
*work
)
7772 struct request_boost
*boost
= container_of(work
, struct request_boost
, work
);
7773 struct drm_i915_gem_request
*req
= boost
->req
;
7775 if (!i915_gem_request_completed(req
))
7776 gen6_rps_boost(req
->i915
, NULL
, req
->emitted_jiffies
);
7778 i915_gem_request_put(req
);
7782 void intel_queue_rps_boost_for_request(struct drm_i915_gem_request
*req
)
7784 struct request_boost
*boost
;
7786 if (req
== NULL
|| INTEL_GEN(req
->i915
) < 6)
7789 if (i915_gem_request_completed(req
))
7792 boost
= kmalloc(sizeof(*boost
), GFP_ATOMIC
);
7796 boost
->req
= i915_gem_request_get(req
);
7798 INIT_WORK(&boost
->work
, __intel_rps_boost_work
);
7799 queue_work(req
->i915
->wq
, &boost
->work
);
7802 void intel_pm_setup(struct drm_device
*dev
)
7804 struct drm_i915_private
*dev_priv
= to_i915(dev
);
7806 mutex_init(&dev_priv
->rps
.hw_lock
);
7807 spin_lock_init(&dev_priv
->rps
.client_lock
);
7809 INIT_DELAYED_WORK(&dev_priv
->rps
.autoenable_work
,
7810 __intel_autoenable_gt_powersave
);
7811 INIT_LIST_HEAD(&dev_priv
->rps
.clients
);
7813 dev_priv
->pm
.suspended
= false;
7814 atomic_set(&dev_priv
->pm
.wakeref_count
, 0);
7815 atomic_set(&dev_priv
->pm
.atomic_seq
, 0);