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>
30 #include "intel_drv.h"
31 #include "../../../platform/x86/intel_ips.h"
32 #include <linux/module.h>
33 #include <linux/vgaarb.h>
34 #include <drm/i915_powerwell.h>
35 #include <linux/pm_runtime.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 /* FBC, or Frame Buffer Compression, is a technique employed to compress the
59 * framebuffer contents in-memory, aiming at reducing the required bandwidth
60 * during in-memory transfers and, therefore, reduce the power packet.
62 * The benefits of FBC are mostly visible with solid backgrounds and
63 * variation-less patterns.
65 * FBC-related functionality can be enabled by the means of the
66 * i915.i915_enable_fbc parameter
69 static void i8xx_disable_fbc(struct drm_device
*dev
)
71 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
74 /* Disable compression */
75 fbc_ctl
= I915_READ(FBC_CONTROL
);
76 if ((fbc_ctl
& FBC_CTL_EN
) == 0)
79 fbc_ctl
&= ~FBC_CTL_EN
;
80 I915_WRITE(FBC_CONTROL
, fbc_ctl
);
82 /* Wait for compressing bit to clear */
83 if (wait_for((I915_READ(FBC_STATUS
) & FBC_STAT_COMPRESSING
) == 0, 10)) {
84 DRM_DEBUG_KMS("FBC idle timed out\n");
88 DRM_DEBUG_KMS("disabled FBC\n");
91 static void i8xx_enable_fbc(struct drm_crtc
*crtc
)
93 struct drm_device
*dev
= crtc
->dev
;
94 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
95 struct drm_framebuffer
*fb
= crtc
->fb
;
96 struct intel_framebuffer
*intel_fb
= to_intel_framebuffer(fb
);
97 struct drm_i915_gem_object
*obj
= intel_fb
->obj
;
98 struct intel_crtc
*intel_crtc
= to_intel_crtc(crtc
);
103 cfb_pitch
= dev_priv
->fbc
.size
/ FBC_LL_SIZE
;
104 if (fb
->pitches
[0] < cfb_pitch
)
105 cfb_pitch
= fb
->pitches
[0];
107 /* FBC_CTL wants 32B or 64B units */
109 cfb_pitch
= (cfb_pitch
/ 32) - 1;
111 cfb_pitch
= (cfb_pitch
/ 64) - 1;
112 plane
= intel_crtc
->plane
== 0 ? FBC_CTL_PLANEA
: FBC_CTL_PLANEB
;
115 for (i
= 0; i
< (FBC_LL_SIZE
/ 32) + 1; i
++)
116 I915_WRITE(FBC_TAG
+ (i
* 4), 0);
122 fbc_ctl2
= FBC_CTL_FENCE_DBL
| FBC_CTL_IDLE_IMM
| FBC_CTL_CPU_FENCE
;
124 I915_WRITE(FBC_CONTROL2
, fbc_ctl2
);
125 I915_WRITE(FBC_FENCE_OFF
, crtc
->y
);
129 fbc_ctl
= I915_READ(FBC_CONTROL
);
130 fbc_ctl
&= 0x3fff << FBC_CTL_INTERVAL_SHIFT
;
131 fbc_ctl
|= FBC_CTL_EN
| FBC_CTL_PERIODIC
;
133 fbc_ctl
|= FBC_CTL_C3_IDLE
; /* 945 needs special SR handling */
134 fbc_ctl
|= (cfb_pitch
& 0xff) << FBC_CTL_STRIDE_SHIFT
;
135 fbc_ctl
|= obj
->fence_reg
;
136 I915_WRITE(FBC_CONTROL
, fbc_ctl
);
138 DRM_DEBUG_KMS("enabled FBC, pitch %d, yoff %d, plane %c, ",
139 cfb_pitch
, crtc
->y
, plane_name(intel_crtc
->plane
));
142 static bool i8xx_fbc_enabled(struct drm_device
*dev
)
144 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
146 return I915_READ(FBC_CONTROL
) & FBC_CTL_EN
;
149 static void g4x_enable_fbc(struct drm_crtc
*crtc
)
151 struct drm_device
*dev
= crtc
->dev
;
152 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
153 struct drm_framebuffer
*fb
= crtc
->fb
;
154 struct intel_framebuffer
*intel_fb
= to_intel_framebuffer(fb
);
155 struct drm_i915_gem_object
*obj
= intel_fb
->obj
;
156 struct intel_crtc
*intel_crtc
= to_intel_crtc(crtc
);
157 int plane
= intel_crtc
->plane
== 0 ? DPFC_CTL_PLANEA
: DPFC_CTL_PLANEB
;
160 dpfc_ctl
= plane
| DPFC_SR_EN
| DPFC_CTL_LIMIT_1X
;
161 dpfc_ctl
|= DPFC_CTL_FENCE_EN
| obj
->fence_reg
;
162 I915_WRITE(DPFC_CHICKEN
, DPFC_HT_MODIFY
);
164 I915_WRITE(DPFC_FENCE_YOFF
, crtc
->y
);
167 I915_WRITE(DPFC_CONTROL
, I915_READ(DPFC_CONTROL
) | DPFC_CTL_EN
);
169 DRM_DEBUG_KMS("enabled fbc on plane %c\n", plane_name(intel_crtc
->plane
));
172 static void g4x_disable_fbc(struct drm_device
*dev
)
174 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
177 /* Disable compression */
178 dpfc_ctl
= I915_READ(DPFC_CONTROL
);
179 if (dpfc_ctl
& DPFC_CTL_EN
) {
180 dpfc_ctl
&= ~DPFC_CTL_EN
;
181 I915_WRITE(DPFC_CONTROL
, dpfc_ctl
);
183 DRM_DEBUG_KMS("disabled FBC\n");
187 static bool g4x_fbc_enabled(struct drm_device
*dev
)
189 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
191 return I915_READ(DPFC_CONTROL
) & DPFC_CTL_EN
;
194 static void sandybridge_blit_fbc_update(struct drm_device
*dev
)
196 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
199 /* Make sure blitter notifies FBC of writes */
201 /* Blitter is part of Media powerwell on VLV. No impact of
202 * his param in other platforms for now */
203 gen6_gt_force_wake_get(dev_priv
, FORCEWAKE_MEDIA
);
205 blt_ecoskpd
= I915_READ(GEN6_BLITTER_ECOSKPD
);
206 blt_ecoskpd
|= GEN6_BLITTER_FBC_NOTIFY
<<
207 GEN6_BLITTER_LOCK_SHIFT
;
208 I915_WRITE(GEN6_BLITTER_ECOSKPD
, blt_ecoskpd
);
209 blt_ecoskpd
|= GEN6_BLITTER_FBC_NOTIFY
;
210 I915_WRITE(GEN6_BLITTER_ECOSKPD
, blt_ecoskpd
);
211 blt_ecoskpd
&= ~(GEN6_BLITTER_FBC_NOTIFY
<<
212 GEN6_BLITTER_LOCK_SHIFT
);
213 I915_WRITE(GEN6_BLITTER_ECOSKPD
, blt_ecoskpd
);
214 POSTING_READ(GEN6_BLITTER_ECOSKPD
);
216 gen6_gt_force_wake_put(dev_priv
, FORCEWAKE_MEDIA
);
219 static void ironlake_enable_fbc(struct drm_crtc
*crtc
)
221 struct drm_device
*dev
= crtc
->dev
;
222 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
223 struct drm_framebuffer
*fb
= crtc
->fb
;
224 struct intel_framebuffer
*intel_fb
= to_intel_framebuffer(fb
);
225 struct drm_i915_gem_object
*obj
= intel_fb
->obj
;
226 struct intel_crtc
*intel_crtc
= to_intel_crtc(crtc
);
227 int plane
= intel_crtc
->plane
== 0 ? DPFC_CTL_PLANEA
: DPFC_CTL_PLANEB
;
230 dpfc_ctl
= I915_READ(ILK_DPFC_CONTROL
);
231 dpfc_ctl
&= DPFC_RESERVED
;
232 dpfc_ctl
|= (plane
| DPFC_CTL_LIMIT_1X
);
233 /* Set persistent mode for front-buffer rendering, ala X. */
234 dpfc_ctl
|= DPFC_CTL_PERSISTENT_MODE
;
235 dpfc_ctl
|= DPFC_CTL_FENCE_EN
;
237 dpfc_ctl
|= obj
->fence_reg
;
238 I915_WRITE(ILK_DPFC_CHICKEN
, DPFC_HT_MODIFY
);
240 I915_WRITE(ILK_DPFC_FENCE_YOFF
, crtc
->y
);
241 I915_WRITE(ILK_FBC_RT_BASE
, i915_gem_obj_ggtt_offset(obj
) | ILK_FBC_RT_VALID
);
243 I915_WRITE(ILK_DPFC_CONTROL
, dpfc_ctl
| DPFC_CTL_EN
);
246 I915_WRITE(SNB_DPFC_CTL_SA
,
247 SNB_CPU_FENCE_ENABLE
| obj
->fence_reg
);
248 I915_WRITE(DPFC_CPU_FENCE_OFFSET
, crtc
->y
);
249 sandybridge_blit_fbc_update(dev
);
252 DRM_DEBUG_KMS("enabled fbc on plane %c\n", plane_name(intel_crtc
->plane
));
255 static void ironlake_disable_fbc(struct drm_device
*dev
)
257 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
260 /* Disable compression */
261 dpfc_ctl
= I915_READ(ILK_DPFC_CONTROL
);
262 if (dpfc_ctl
& DPFC_CTL_EN
) {
263 dpfc_ctl
&= ~DPFC_CTL_EN
;
264 I915_WRITE(ILK_DPFC_CONTROL
, dpfc_ctl
);
266 DRM_DEBUG_KMS("disabled FBC\n");
270 static bool ironlake_fbc_enabled(struct drm_device
*dev
)
272 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
274 return I915_READ(ILK_DPFC_CONTROL
) & DPFC_CTL_EN
;
277 static void gen7_enable_fbc(struct drm_crtc
*crtc
)
279 struct drm_device
*dev
= crtc
->dev
;
280 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
281 struct drm_framebuffer
*fb
= crtc
->fb
;
282 struct intel_framebuffer
*intel_fb
= to_intel_framebuffer(fb
);
283 struct drm_i915_gem_object
*obj
= intel_fb
->obj
;
284 struct intel_crtc
*intel_crtc
= to_intel_crtc(crtc
);
286 I915_WRITE(IVB_FBC_RT_BASE
, i915_gem_obj_ggtt_offset(obj
));
288 I915_WRITE(ILK_DPFC_CONTROL
, DPFC_CTL_EN
| DPFC_CTL_LIMIT_1X
|
289 IVB_DPFC_CTL_FENCE_EN
|
290 intel_crtc
->plane
<< IVB_DPFC_CTL_PLANE_SHIFT
);
292 if (IS_IVYBRIDGE(dev
)) {
293 /* WaFbcAsynchFlipDisableFbcQueue:ivb */
294 I915_WRITE(ILK_DISPLAY_CHICKEN1
, ILK_FBCQ_DIS
);
296 /* WaFbcAsynchFlipDisableFbcQueue:hsw */
297 I915_WRITE(HSW_PIPE_SLICE_CHICKEN_1(intel_crtc
->pipe
),
298 HSW_BYPASS_FBC_QUEUE
);
301 I915_WRITE(SNB_DPFC_CTL_SA
,
302 SNB_CPU_FENCE_ENABLE
| obj
->fence_reg
);
303 I915_WRITE(DPFC_CPU_FENCE_OFFSET
, crtc
->y
);
305 sandybridge_blit_fbc_update(dev
);
307 DRM_DEBUG_KMS("enabled fbc on plane %c\n", plane_name(intel_crtc
->plane
));
310 bool intel_fbc_enabled(struct drm_device
*dev
)
312 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
314 if (!dev_priv
->display
.fbc_enabled
)
317 return dev_priv
->display
.fbc_enabled(dev
);
320 static void intel_fbc_work_fn(struct work_struct
*__work
)
322 struct intel_fbc_work
*work
=
323 container_of(to_delayed_work(__work
),
324 struct intel_fbc_work
, work
);
325 struct drm_device
*dev
= work
->crtc
->dev
;
326 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
328 mutex_lock(&dev
->struct_mutex
);
329 if (work
== dev_priv
->fbc
.fbc_work
) {
330 /* Double check that we haven't switched fb without cancelling
333 if (work
->crtc
->fb
== work
->fb
) {
334 dev_priv
->display
.enable_fbc(work
->crtc
);
336 dev_priv
->fbc
.plane
= to_intel_crtc(work
->crtc
)->plane
;
337 dev_priv
->fbc
.fb_id
= work
->crtc
->fb
->base
.id
;
338 dev_priv
->fbc
.y
= work
->crtc
->y
;
341 dev_priv
->fbc
.fbc_work
= NULL
;
343 mutex_unlock(&dev
->struct_mutex
);
348 static void intel_cancel_fbc_work(struct drm_i915_private
*dev_priv
)
350 if (dev_priv
->fbc
.fbc_work
== NULL
)
353 DRM_DEBUG_KMS("cancelling pending FBC enable\n");
355 /* Synchronisation is provided by struct_mutex and checking of
356 * dev_priv->fbc.fbc_work, so we can perform the cancellation
357 * entirely asynchronously.
359 if (cancel_delayed_work(&dev_priv
->fbc
.fbc_work
->work
))
360 /* tasklet was killed before being run, clean up */
361 kfree(dev_priv
->fbc
.fbc_work
);
363 /* Mark the work as no longer wanted so that if it does
364 * wake-up (because the work was already running and waiting
365 * for our mutex), it will discover that is no longer
368 dev_priv
->fbc
.fbc_work
= NULL
;
371 static void intel_enable_fbc(struct drm_crtc
*crtc
)
373 struct intel_fbc_work
*work
;
374 struct drm_device
*dev
= crtc
->dev
;
375 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
377 if (!dev_priv
->display
.enable_fbc
)
380 intel_cancel_fbc_work(dev_priv
);
382 work
= kzalloc(sizeof(*work
), GFP_KERNEL
);
384 DRM_ERROR("Failed to allocate FBC work structure\n");
385 dev_priv
->display
.enable_fbc(crtc
);
391 INIT_DELAYED_WORK(&work
->work
, intel_fbc_work_fn
);
393 dev_priv
->fbc
.fbc_work
= work
;
395 /* Delay the actual enabling to let pageflipping cease and the
396 * display to settle before starting the compression. Note that
397 * this delay also serves a second purpose: it allows for a
398 * vblank to pass after disabling the FBC before we attempt
399 * to modify the control registers.
401 * A more complicated solution would involve tracking vblanks
402 * following the termination of the page-flipping sequence
403 * and indeed performing the enable as a co-routine and not
404 * waiting synchronously upon the vblank.
406 * WaFbcWaitForVBlankBeforeEnable:ilk,snb
408 schedule_delayed_work(&work
->work
, msecs_to_jiffies(50));
411 void intel_disable_fbc(struct drm_device
*dev
)
413 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
415 intel_cancel_fbc_work(dev_priv
);
417 if (!dev_priv
->display
.disable_fbc
)
420 dev_priv
->display
.disable_fbc(dev
);
421 dev_priv
->fbc
.plane
= -1;
424 static bool set_no_fbc_reason(struct drm_i915_private
*dev_priv
,
425 enum no_fbc_reason reason
)
427 if (dev_priv
->fbc
.no_fbc_reason
== reason
)
430 dev_priv
->fbc
.no_fbc_reason
= reason
;
435 * intel_update_fbc - enable/disable FBC as needed
436 * @dev: the drm_device
438 * Set up the framebuffer compression hardware at mode set time. We
439 * enable it if possible:
440 * - plane A only (on pre-965)
441 * - no pixel mulitply/line duplication
442 * - no alpha buffer discard
444 * - framebuffer <= max_hdisplay in width, max_vdisplay in height
446 * We can't assume that any compression will take place (worst case),
447 * so the compressed buffer has to be the same size as the uncompressed
448 * one. It also must reside (along with the line length buffer) in
451 * We need to enable/disable FBC on a global basis.
453 void intel_update_fbc(struct drm_device
*dev
)
455 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
456 struct drm_crtc
*crtc
= NULL
, *tmp_crtc
;
457 struct intel_crtc
*intel_crtc
;
458 struct drm_framebuffer
*fb
;
459 struct intel_framebuffer
*intel_fb
;
460 struct drm_i915_gem_object
*obj
;
461 const struct drm_display_mode
*adjusted_mode
;
462 unsigned int max_width
, max_height
;
464 if (!I915_HAS_FBC(dev
)) {
465 set_no_fbc_reason(dev_priv
, FBC_UNSUPPORTED
);
469 if (!i915_powersave
) {
470 if (set_no_fbc_reason(dev_priv
, FBC_MODULE_PARAM
))
471 DRM_DEBUG_KMS("fbc disabled per module param\n");
476 * If FBC is already on, we just have to verify that we can
477 * keep it that way...
478 * Need to disable if:
479 * - more than one pipe is active
480 * - changing FBC params (stride, fence, mode)
481 * - new fb is too large to fit in compressed buffer
482 * - going to an unsupported config (interlace, pixel multiply, etc.)
484 list_for_each_entry(tmp_crtc
, &dev
->mode_config
.crtc_list
, head
) {
485 if (intel_crtc_active(tmp_crtc
) &&
486 to_intel_crtc(tmp_crtc
)->primary_enabled
) {
488 if (set_no_fbc_reason(dev_priv
, FBC_MULTIPLE_PIPES
))
489 DRM_DEBUG_KMS("more than one pipe active, disabling compression\n");
496 if (!crtc
|| crtc
->fb
== NULL
) {
497 if (set_no_fbc_reason(dev_priv
, FBC_NO_OUTPUT
))
498 DRM_DEBUG_KMS("no output, disabling\n");
502 intel_crtc
= to_intel_crtc(crtc
);
504 intel_fb
= to_intel_framebuffer(fb
);
506 adjusted_mode
= &intel_crtc
->config
.adjusted_mode
;
508 if (i915_enable_fbc
< 0 &&
509 INTEL_INFO(dev
)->gen
<= 7 && !IS_HASWELL(dev
)) {
510 if (set_no_fbc_reason(dev_priv
, FBC_CHIP_DEFAULT
))
511 DRM_DEBUG_KMS("disabled per chip default\n");
514 if (!i915_enable_fbc
) {
515 if (set_no_fbc_reason(dev_priv
, FBC_MODULE_PARAM
))
516 DRM_DEBUG_KMS("fbc disabled per module param\n");
519 if ((adjusted_mode
->flags
& DRM_MODE_FLAG_INTERLACE
) ||
520 (adjusted_mode
->flags
& DRM_MODE_FLAG_DBLSCAN
)) {
521 if (set_no_fbc_reason(dev_priv
, FBC_UNSUPPORTED_MODE
))
522 DRM_DEBUG_KMS("mode incompatible with compression, "
527 if (IS_G4X(dev
) || INTEL_INFO(dev
)->gen
>= 5) {
534 if (intel_crtc
->config
.pipe_src_w
> max_width
||
535 intel_crtc
->config
.pipe_src_h
> max_height
) {
536 if (set_no_fbc_reason(dev_priv
, FBC_MODE_TOO_LARGE
))
537 DRM_DEBUG_KMS("mode too large for compression, disabling\n");
540 if ((INTEL_INFO(dev
)->gen
< 4 || IS_HASWELL(dev
)) &&
541 intel_crtc
->plane
!= PLANE_A
) {
542 if (set_no_fbc_reason(dev_priv
, FBC_BAD_PLANE
))
543 DRM_DEBUG_KMS("plane not A, disabling compression\n");
547 /* The use of a CPU fence is mandatory in order to detect writes
548 * by the CPU to the scanout and trigger updates to the FBC.
550 if (obj
->tiling_mode
!= I915_TILING_X
||
551 obj
->fence_reg
== I915_FENCE_REG_NONE
) {
552 if (set_no_fbc_reason(dev_priv
, FBC_NOT_TILED
))
553 DRM_DEBUG_KMS("framebuffer not tiled or fenced, disabling compression\n");
557 /* If the kernel debugger is active, always disable compression */
561 if (i915_gem_stolen_setup_compression(dev
, intel_fb
->obj
->base
.size
)) {
562 if (set_no_fbc_reason(dev_priv
, FBC_STOLEN_TOO_SMALL
))
563 DRM_DEBUG_KMS("framebuffer too large, disabling compression\n");
567 /* If the scanout has not changed, don't modify the FBC settings.
568 * Note that we make the fundamental assumption that the fb->obj
569 * cannot be unpinned (and have its GTT offset and fence revoked)
570 * without first being decoupled from the scanout and FBC disabled.
572 if (dev_priv
->fbc
.plane
== intel_crtc
->plane
&&
573 dev_priv
->fbc
.fb_id
== fb
->base
.id
&&
574 dev_priv
->fbc
.y
== crtc
->y
)
577 if (intel_fbc_enabled(dev
)) {
578 /* We update FBC along two paths, after changing fb/crtc
579 * configuration (modeswitching) and after page-flipping
580 * finishes. For the latter, we know that not only did
581 * we disable the FBC at the start of the page-flip
582 * sequence, but also more than one vblank has passed.
584 * For the former case of modeswitching, it is possible
585 * to switch between two FBC valid configurations
586 * instantaneously so we do need to disable the FBC
587 * before we can modify its control registers. We also
588 * have to wait for the next vblank for that to take
589 * effect. However, since we delay enabling FBC we can
590 * assume that a vblank has passed since disabling and
591 * that we can safely alter the registers in the deferred
594 * In the scenario that we go from a valid to invalid
595 * and then back to valid FBC configuration we have
596 * no strict enforcement that a vblank occurred since
597 * disabling the FBC. However, along all current pipe
598 * disabling paths we do need to wait for a vblank at
599 * some point. And we wait before enabling FBC anyway.
601 DRM_DEBUG_KMS("disabling active FBC for update\n");
602 intel_disable_fbc(dev
);
605 intel_enable_fbc(crtc
);
606 dev_priv
->fbc
.no_fbc_reason
= FBC_OK
;
610 /* Multiple disables should be harmless */
611 if (intel_fbc_enabled(dev
)) {
612 DRM_DEBUG_KMS("unsupported config, disabling FBC\n");
613 intel_disable_fbc(dev
);
615 i915_gem_stolen_cleanup_compression(dev
);
618 static void i915_pineview_get_mem_freq(struct drm_device
*dev
)
620 drm_i915_private_t
*dev_priv
= dev
->dev_private
;
623 tmp
= I915_READ(CLKCFG
);
625 switch (tmp
& CLKCFG_FSB_MASK
) {
627 dev_priv
->fsb_freq
= 533; /* 133*4 */
630 dev_priv
->fsb_freq
= 800; /* 200*4 */
633 dev_priv
->fsb_freq
= 667; /* 167*4 */
636 dev_priv
->fsb_freq
= 400; /* 100*4 */
640 switch (tmp
& CLKCFG_MEM_MASK
) {
642 dev_priv
->mem_freq
= 533;
645 dev_priv
->mem_freq
= 667;
648 dev_priv
->mem_freq
= 800;
652 /* detect pineview DDR3 setting */
653 tmp
= I915_READ(CSHRDDR3CTL
);
654 dev_priv
->is_ddr3
= (tmp
& CSHRDDR3CTL_DDR3
) ? 1 : 0;
657 static void i915_ironlake_get_mem_freq(struct drm_device
*dev
)
659 drm_i915_private_t
*dev_priv
= dev
->dev_private
;
662 ddrpll
= I915_READ16(DDRMPLL1
);
663 csipll
= I915_READ16(CSIPLL0
);
665 switch (ddrpll
& 0xff) {
667 dev_priv
->mem_freq
= 800;
670 dev_priv
->mem_freq
= 1066;
673 dev_priv
->mem_freq
= 1333;
676 dev_priv
->mem_freq
= 1600;
679 DRM_DEBUG_DRIVER("unknown memory frequency 0x%02x\n",
681 dev_priv
->mem_freq
= 0;
685 dev_priv
->ips
.r_t
= dev_priv
->mem_freq
;
687 switch (csipll
& 0x3ff) {
689 dev_priv
->fsb_freq
= 3200;
692 dev_priv
->fsb_freq
= 3733;
695 dev_priv
->fsb_freq
= 4266;
698 dev_priv
->fsb_freq
= 4800;
701 dev_priv
->fsb_freq
= 5333;
704 dev_priv
->fsb_freq
= 5866;
707 dev_priv
->fsb_freq
= 6400;
710 DRM_DEBUG_DRIVER("unknown fsb frequency 0x%04x\n",
712 dev_priv
->fsb_freq
= 0;
716 if (dev_priv
->fsb_freq
== 3200) {
717 dev_priv
->ips
.c_m
= 0;
718 } else if (dev_priv
->fsb_freq
> 3200 && dev_priv
->fsb_freq
<= 4800) {
719 dev_priv
->ips
.c_m
= 1;
721 dev_priv
->ips
.c_m
= 2;
725 static const struct cxsr_latency cxsr_latency_table
[] = {
726 {1, 0, 800, 400, 3382, 33382, 3983, 33983}, /* DDR2-400 SC */
727 {1, 0, 800, 667, 3354, 33354, 3807, 33807}, /* DDR2-667 SC */
728 {1, 0, 800, 800, 3347, 33347, 3763, 33763}, /* DDR2-800 SC */
729 {1, 1, 800, 667, 6420, 36420, 6873, 36873}, /* DDR3-667 SC */
730 {1, 1, 800, 800, 5902, 35902, 6318, 36318}, /* DDR3-800 SC */
732 {1, 0, 667, 400, 3400, 33400, 4021, 34021}, /* DDR2-400 SC */
733 {1, 0, 667, 667, 3372, 33372, 3845, 33845}, /* DDR2-667 SC */
734 {1, 0, 667, 800, 3386, 33386, 3822, 33822}, /* DDR2-800 SC */
735 {1, 1, 667, 667, 6438, 36438, 6911, 36911}, /* DDR3-667 SC */
736 {1, 1, 667, 800, 5941, 35941, 6377, 36377}, /* DDR3-800 SC */
738 {1, 0, 400, 400, 3472, 33472, 4173, 34173}, /* DDR2-400 SC */
739 {1, 0, 400, 667, 3443, 33443, 3996, 33996}, /* DDR2-667 SC */
740 {1, 0, 400, 800, 3430, 33430, 3946, 33946}, /* DDR2-800 SC */
741 {1, 1, 400, 667, 6509, 36509, 7062, 37062}, /* DDR3-667 SC */
742 {1, 1, 400, 800, 5985, 35985, 6501, 36501}, /* DDR3-800 SC */
744 {0, 0, 800, 400, 3438, 33438, 4065, 34065}, /* DDR2-400 SC */
745 {0, 0, 800, 667, 3410, 33410, 3889, 33889}, /* DDR2-667 SC */
746 {0, 0, 800, 800, 3403, 33403, 3845, 33845}, /* DDR2-800 SC */
747 {0, 1, 800, 667, 6476, 36476, 6955, 36955}, /* DDR3-667 SC */
748 {0, 1, 800, 800, 5958, 35958, 6400, 36400}, /* DDR3-800 SC */
750 {0, 0, 667, 400, 3456, 33456, 4103, 34106}, /* DDR2-400 SC */
751 {0, 0, 667, 667, 3428, 33428, 3927, 33927}, /* DDR2-667 SC */
752 {0, 0, 667, 800, 3443, 33443, 3905, 33905}, /* DDR2-800 SC */
753 {0, 1, 667, 667, 6494, 36494, 6993, 36993}, /* DDR3-667 SC */
754 {0, 1, 667, 800, 5998, 35998, 6460, 36460}, /* DDR3-800 SC */
756 {0, 0, 400, 400, 3528, 33528, 4255, 34255}, /* DDR2-400 SC */
757 {0, 0, 400, 667, 3500, 33500, 4079, 34079}, /* DDR2-667 SC */
758 {0, 0, 400, 800, 3487, 33487, 4029, 34029}, /* DDR2-800 SC */
759 {0, 1, 400, 667, 6566, 36566, 7145, 37145}, /* DDR3-667 SC */
760 {0, 1, 400, 800, 6042, 36042, 6584, 36584}, /* DDR3-800 SC */
763 static const struct cxsr_latency
*intel_get_cxsr_latency(int is_desktop
,
768 const struct cxsr_latency
*latency
;
771 if (fsb
== 0 || mem
== 0)
774 for (i
= 0; i
< ARRAY_SIZE(cxsr_latency_table
); i
++) {
775 latency
= &cxsr_latency_table
[i
];
776 if (is_desktop
== latency
->is_desktop
&&
777 is_ddr3
== latency
->is_ddr3
&&
778 fsb
== latency
->fsb_freq
&& mem
== latency
->mem_freq
)
782 DRM_DEBUG_KMS("Unknown FSB/MEM found, disable CxSR\n");
787 static void pineview_disable_cxsr(struct drm_device
*dev
)
789 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
791 /* deactivate cxsr */
792 I915_WRITE(DSPFW3
, I915_READ(DSPFW3
) & ~PINEVIEW_SELF_REFRESH_EN
);
796 * Latency for FIFO fetches is dependent on several factors:
797 * - memory configuration (speed, channels)
799 * - current MCH state
800 * It can be fairly high in some situations, so here we assume a fairly
801 * pessimal value. It's a tradeoff between extra memory fetches (if we
802 * set this value too high, the FIFO will fetch frequently to stay full)
803 * and power consumption (set it too low to save power and we might see
804 * FIFO underruns and display "flicker").
806 * A value of 5us seems to be a good balance; safe for very low end
807 * platforms but not overly aggressive on lower latency configs.
809 static const int latency_ns
= 5000;
811 static int i9xx_get_fifo_size(struct drm_device
*dev
, int plane
)
813 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
814 uint32_t dsparb
= I915_READ(DSPARB
);
817 size
= dsparb
& 0x7f;
819 size
= ((dsparb
>> DSPARB_CSTART_SHIFT
) & 0x7f) - size
;
821 DRM_DEBUG_KMS("FIFO size - (0x%08x) %s: %d\n", dsparb
,
822 plane
? "B" : "A", size
);
827 static int i85x_get_fifo_size(struct drm_device
*dev
, int plane
)
829 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
830 uint32_t dsparb
= I915_READ(DSPARB
);
833 size
= dsparb
& 0x1ff;
835 size
= ((dsparb
>> DSPARB_BEND_SHIFT
) & 0x1ff) - size
;
836 size
>>= 1; /* Convert to cachelines */
838 DRM_DEBUG_KMS("FIFO size - (0x%08x) %s: %d\n", dsparb
,
839 plane
? "B" : "A", size
);
844 static int i845_get_fifo_size(struct drm_device
*dev
, int plane
)
846 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
847 uint32_t dsparb
= I915_READ(DSPARB
);
850 size
= dsparb
& 0x7f;
851 size
>>= 2; /* Convert to cachelines */
853 DRM_DEBUG_KMS("FIFO size - (0x%08x) %s: %d\n", dsparb
,
860 static int i830_get_fifo_size(struct drm_device
*dev
, int plane
)
862 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
863 uint32_t dsparb
= I915_READ(DSPARB
);
866 size
= dsparb
& 0x7f;
867 size
>>= 1; /* Convert to cachelines */
869 DRM_DEBUG_KMS("FIFO size - (0x%08x) %s: %d\n", dsparb
,
870 plane
? "B" : "A", size
);
875 /* Pineview has different values for various configs */
876 static const struct intel_watermark_params pineview_display_wm
= {
877 PINEVIEW_DISPLAY_FIFO
,
881 PINEVIEW_FIFO_LINE_SIZE
883 static const struct intel_watermark_params pineview_display_hplloff_wm
= {
884 PINEVIEW_DISPLAY_FIFO
,
886 PINEVIEW_DFT_HPLLOFF_WM
,
888 PINEVIEW_FIFO_LINE_SIZE
890 static const struct intel_watermark_params pineview_cursor_wm
= {
891 PINEVIEW_CURSOR_FIFO
,
892 PINEVIEW_CURSOR_MAX_WM
,
893 PINEVIEW_CURSOR_DFT_WM
,
894 PINEVIEW_CURSOR_GUARD_WM
,
895 PINEVIEW_FIFO_LINE_SIZE
,
897 static const struct intel_watermark_params pineview_cursor_hplloff_wm
= {
898 PINEVIEW_CURSOR_FIFO
,
899 PINEVIEW_CURSOR_MAX_WM
,
900 PINEVIEW_CURSOR_DFT_WM
,
901 PINEVIEW_CURSOR_GUARD_WM
,
902 PINEVIEW_FIFO_LINE_SIZE
904 static const struct intel_watermark_params g4x_wm_info
= {
911 static const struct intel_watermark_params g4x_cursor_wm_info
= {
918 static const struct intel_watermark_params valleyview_wm_info
= {
919 VALLEYVIEW_FIFO_SIZE
,
925 static const struct intel_watermark_params valleyview_cursor_wm_info
= {
927 VALLEYVIEW_CURSOR_MAX_WM
,
932 static const struct intel_watermark_params i965_cursor_wm_info
= {
939 static const struct intel_watermark_params i945_wm_info
= {
946 static const struct intel_watermark_params i915_wm_info
= {
953 static const struct intel_watermark_params i855_wm_info
= {
960 static const struct intel_watermark_params i830_wm_info
= {
968 static const struct intel_watermark_params ironlake_display_wm_info
= {
975 static const struct intel_watermark_params ironlake_cursor_wm_info
= {
982 static const struct intel_watermark_params ironlake_display_srwm_info
= {
984 ILK_DISPLAY_MAX_SRWM
,
985 ILK_DISPLAY_DFT_SRWM
,
989 static const struct intel_watermark_params ironlake_cursor_srwm_info
= {
997 static const struct intel_watermark_params sandybridge_display_wm_info
= {
1004 static const struct intel_watermark_params sandybridge_cursor_wm_info
= {
1011 static const struct intel_watermark_params sandybridge_display_srwm_info
= {
1012 SNB_DISPLAY_SR_FIFO
,
1013 SNB_DISPLAY_MAX_SRWM
,
1014 SNB_DISPLAY_DFT_SRWM
,
1018 static const struct intel_watermark_params sandybridge_cursor_srwm_info
= {
1020 SNB_CURSOR_MAX_SRWM
,
1021 SNB_CURSOR_DFT_SRWM
,
1028 * intel_calculate_wm - calculate watermark level
1029 * @clock_in_khz: pixel clock
1030 * @wm: chip FIFO params
1031 * @pixel_size: display pixel size
1032 * @latency_ns: memory latency for the platform
1034 * Calculate the watermark level (the level at which the display plane will
1035 * start fetching from memory again). Each chip has a different display
1036 * FIFO size and allocation, so the caller needs to figure that out and pass
1037 * in the correct intel_watermark_params structure.
1039 * As the pixel clock runs, the FIFO will be drained at a rate that depends
1040 * on the pixel size. When it reaches the watermark level, it'll start
1041 * fetching FIFO line sized based chunks from memory until the FIFO fills
1042 * past the watermark point. If the FIFO drains completely, a FIFO underrun
1043 * will occur, and a display engine hang could result.
1045 static unsigned long intel_calculate_wm(unsigned long clock_in_khz
,
1046 const struct intel_watermark_params
*wm
,
1049 unsigned long latency_ns
)
1051 long entries_required
, wm_size
;
1054 * Note: we need to make sure we don't overflow for various clock &
1056 * clocks go from a few thousand to several hundred thousand.
1057 * latency is usually a few thousand
1059 entries_required
= ((clock_in_khz
/ 1000) * pixel_size
* latency_ns
) /
1061 entries_required
= DIV_ROUND_UP(entries_required
, wm
->cacheline_size
);
1063 DRM_DEBUG_KMS("FIFO entries required for mode: %ld\n", entries_required
);
1065 wm_size
= fifo_size
- (entries_required
+ wm
->guard_size
);
1067 DRM_DEBUG_KMS("FIFO watermark level: %ld\n", wm_size
);
1069 /* Don't promote wm_size to unsigned... */
1070 if (wm_size
> (long)wm
->max_wm
)
1071 wm_size
= wm
->max_wm
;
1073 wm_size
= wm
->default_wm
;
1077 static struct drm_crtc
*single_enabled_crtc(struct drm_device
*dev
)
1079 struct drm_crtc
*crtc
, *enabled
= NULL
;
1081 list_for_each_entry(crtc
, &dev
->mode_config
.crtc_list
, head
) {
1082 if (intel_crtc_active(crtc
)) {
1092 static void pineview_update_wm(struct drm_crtc
*unused_crtc
)
1094 struct drm_device
*dev
= unused_crtc
->dev
;
1095 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
1096 struct drm_crtc
*crtc
;
1097 const struct cxsr_latency
*latency
;
1101 latency
= intel_get_cxsr_latency(IS_PINEVIEW_G(dev
), dev_priv
->is_ddr3
,
1102 dev_priv
->fsb_freq
, dev_priv
->mem_freq
);
1104 DRM_DEBUG_KMS("Unknown FSB/MEM found, disable CxSR\n");
1105 pineview_disable_cxsr(dev
);
1109 crtc
= single_enabled_crtc(dev
);
1111 const struct drm_display_mode
*adjusted_mode
;
1112 int pixel_size
= crtc
->fb
->bits_per_pixel
/ 8;
1115 adjusted_mode
= &to_intel_crtc(crtc
)->config
.adjusted_mode
;
1116 clock
= adjusted_mode
->crtc_clock
;
1119 wm
= intel_calculate_wm(clock
, &pineview_display_wm
,
1120 pineview_display_wm
.fifo_size
,
1121 pixel_size
, latency
->display_sr
);
1122 reg
= I915_READ(DSPFW1
);
1123 reg
&= ~DSPFW_SR_MASK
;
1124 reg
|= wm
<< DSPFW_SR_SHIFT
;
1125 I915_WRITE(DSPFW1
, reg
);
1126 DRM_DEBUG_KMS("DSPFW1 register is %x\n", reg
);
1129 wm
= intel_calculate_wm(clock
, &pineview_cursor_wm
,
1130 pineview_display_wm
.fifo_size
,
1131 pixel_size
, latency
->cursor_sr
);
1132 reg
= I915_READ(DSPFW3
);
1133 reg
&= ~DSPFW_CURSOR_SR_MASK
;
1134 reg
|= (wm
& 0x3f) << DSPFW_CURSOR_SR_SHIFT
;
1135 I915_WRITE(DSPFW3
, reg
);
1137 /* Display HPLL off SR */
1138 wm
= intel_calculate_wm(clock
, &pineview_display_hplloff_wm
,
1139 pineview_display_hplloff_wm
.fifo_size
,
1140 pixel_size
, latency
->display_hpll_disable
);
1141 reg
= I915_READ(DSPFW3
);
1142 reg
&= ~DSPFW_HPLL_SR_MASK
;
1143 reg
|= wm
& DSPFW_HPLL_SR_MASK
;
1144 I915_WRITE(DSPFW3
, reg
);
1146 /* cursor HPLL off SR */
1147 wm
= intel_calculate_wm(clock
, &pineview_cursor_hplloff_wm
,
1148 pineview_display_hplloff_wm
.fifo_size
,
1149 pixel_size
, latency
->cursor_hpll_disable
);
1150 reg
= I915_READ(DSPFW3
);
1151 reg
&= ~DSPFW_HPLL_CURSOR_MASK
;
1152 reg
|= (wm
& 0x3f) << DSPFW_HPLL_CURSOR_SHIFT
;
1153 I915_WRITE(DSPFW3
, reg
);
1154 DRM_DEBUG_KMS("DSPFW3 register is %x\n", reg
);
1158 I915_READ(DSPFW3
) | PINEVIEW_SELF_REFRESH_EN
);
1159 DRM_DEBUG_KMS("Self-refresh is enabled\n");
1161 pineview_disable_cxsr(dev
);
1162 DRM_DEBUG_KMS("Self-refresh is disabled\n");
1166 static bool g4x_compute_wm0(struct drm_device
*dev
,
1168 const struct intel_watermark_params
*display
,
1169 int display_latency_ns
,
1170 const struct intel_watermark_params
*cursor
,
1171 int cursor_latency_ns
,
1175 struct drm_crtc
*crtc
;
1176 const struct drm_display_mode
*adjusted_mode
;
1177 int htotal
, hdisplay
, clock
, pixel_size
;
1178 int line_time_us
, line_count
;
1179 int entries
, tlb_miss
;
1181 crtc
= intel_get_crtc_for_plane(dev
, plane
);
1182 if (!intel_crtc_active(crtc
)) {
1183 *cursor_wm
= cursor
->guard_size
;
1184 *plane_wm
= display
->guard_size
;
1188 adjusted_mode
= &to_intel_crtc(crtc
)->config
.adjusted_mode
;
1189 clock
= adjusted_mode
->crtc_clock
;
1190 htotal
= adjusted_mode
->htotal
;
1191 hdisplay
= to_intel_crtc(crtc
)->config
.pipe_src_w
;
1192 pixel_size
= crtc
->fb
->bits_per_pixel
/ 8;
1194 /* Use the small buffer method to calculate plane watermark */
1195 entries
= ((clock
* pixel_size
/ 1000) * display_latency_ns
) / 1000;
1196 tlb_miss
= display
->fifo_size
*display
->cacheline_size
- hdisplay
* 8;
1198 entries
+= tlb_miss
;
1199 entries
= DIV_ROUND_UP(entries
, display
->cacheline_size
);
1200 *plane_wm
= entries
+ display
->guard_size
;
1201 if (*plane_wm
> (int)display
->max_wm
)
1202 *plane_wm
= display
->max_wm
;
1204 /* Use the large buffer method to calculate cursor watermark */
1205 line_time_us
= ((htotal
* 1000) / clock
);
1206 line_count
= (cursor_latency_ns
/ line_time_us
+ 1000) / 1000;
1207 entries
= line_count
* 64 * pixel_size
;
1208 tlb_miss
= cursor
->fifo_size
*cursor
->cacheline_size
- hdisplay
* 8;
1210 entries
+= tlb_miss
;
1211 entries
= DIV_ROUND_UP(entries
, cursor
->cacheline_size
);
1212 *cursor_wm
= entries
+ cursor
->guard_size
;
1213 if (*cursor_wm
> (int)cursor
->max_wm
)
1214 *cursor_wm
= (int)cursor
->max_wm
;
1220 * Check the wm result.
1222 * If any calculated watermark values is larger than the maximum value that
1223 * can be programmed into the associated watermark register, that watermark
1226 static bool g4x_check_srwm(struct drm_device
*dev
,
1227 int display_wm
, int cursor_wm
,
1228 const struct intel_watermark_params
*display
,
1229 const struct intel_watermark_params
*cursor
)
1231 DRM_DEBUG_KMS("SR watermark: display plane %d, cursor %d\n",
1232 display_wm
, cursor_wm
);
1234 if (display_wm
> display
->max_wm
) {
1235 DRM_DEBUG_KMS("display watermark is too large(%d/%ld), disabling\n",
1236 display_wm
, display
->max_wm
);
1240 if (cursor_wm
> cursor
->max_wm
) {
1241 DRM_DEBUG_KMS("cursor watermark is too large(%d/%ld), disabling\n",
1242 cursor_wm
, cursor
->max_wm
);
1246 if (!(display_wm
|| cursor_wm
)) {
1247 DRM_DEBUG_KMS("SR latency is 0, disabling\n");
1254 static bool g4x_compute_srwm(struct drm_device
*dev
,
1257 const struct intel_watermark_params
*display
,
1258 const struct intel_watermark_params
*cursor
,
1259 int *display_wm
, int *cursor_wm
)
1261 struct drm_crtc
*crtc
;
1262 const struct drm_display_mode
*adjusted_mode
;
1263 int hdisplay
, htotal
, pixel_size
, clock
;
1264 unsigned long line_time_us
;
1265 int line_count
, line_size
;
1270 *display_wm
= *cursor_wm
= 0;
1274 crtc
= intel_get_crtc_for_plane(dev
, plane
);
1275 adjusted_mode
= &to_intel_crtc(crtc
)->config
.adjusted_mode
;
1276 clock
= adjusted_mode
->crtc_clock
;
1277 htotal
= adjusted_mode
->htotal
;
1278 hdisplay
= to_intel_crtc(crtc
)->config
.pipe_src_w
;
1279 pixel_size
= crtc
->fb
->bits_per_pixel
/ 8;
1281 line_time_us
= (htotal
* 1000) / clock
;
1282 line_count
= (latency_ns
/ line_time_us
+ 1000) / 1000;
1283 line_size
= hdisplay
* pixel_size
;
1285 /* Use the minimum of the small and large buffer method for primary */
1286 small
= ((clock
* pixel_size
/ 1000) * latency_ns
) / 1000;
1287 large
= line_count
* line_size
;
1289 entries
= DIV_ROUND_UP(min(small
, large
), display
->cacheline_size
);
1290 *display_wm
= entries
+ display
->guard_size
;
1292 /* calculate the self-refresh watermark for display cursor */
1293 entries
= line_count
* pixel_size
* 64;
1294 entries
= DIV_ROUND_UP(entries
, cursor
->cacheline_size
);
1295 *cursor_wm
= entries
+ cursor
->guard_size
;
1297 return g4x_check_srwm(dev
,
1298 *display_wm
, *cursor_wm
,
1302 static bool vlv_compute_drain_latency(struct drm_device
*dev
,
1304 int *plane_prec_mult
,
1306 int *cursor_prec_mult
,
1309 struct drm_crtc
*crtc
;
1310 int clock
, pixel_size
;
1313 crtc
= intel_get_crtc_for_plane(dev
, plane
);
1314 if (!intel_crtc_active(crtc
))
1317 clock
= to_intel_crtc(crtc
)->config
.adjusted_mode
.crtc_clock
;
1318 pixel_size
= crtc
->fb
->bits_per_pixel
/ 8; /* BPP */
1320 entries
= (clock
/ 1000) * pixel_size
;
1321 *plane_prec_mult
= (entries
> 256) ?
1322 DRAIN_LATENCY_PRECISION_32
: DRAIN_LATENCY_PRECISION_16
;
1323 *plane_dl
= (64 * (*plane_prec_mult
) * 4) / ((clock
/ 1000) *
1326 entries
= (clock
/ 1000) * 4; /* BPP is always 4 for cursor */
1327 *cursor_prec_mult
= (entries
> 256) ?
1328 DRAIN_LATENCY_PRECISION_32
: DRAIN_LATENCY_PRECISION_16
;
1329 *cursor_dl
= (64 * (*cursor_prec_mult
) * 4) / ((clock
/ 1000) * 4);
1335 * Update drain latency registers of memory arbiter
1337 * Valleyview SoC has a new memory arbiter and needs drain latency registers
1338 * to be programmed. Each plane has a drain latency multiplier and a drain
1342 static void vlv_update_drain_latency(struct drm_device
*dev
)
1344 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
1345 int planea_prec
, planea_dl
, planeb_prec
, planeb_dl
;
1346 int cursora_prec
, cursora_dl
, cursorb_prec
, cursorb_dl
;
1347 int plane_prec_mult
, cursor_prec_mult
; /* Precision multiplier is
1350 /* For plane A, Cursor A */
1351 if (vlv_compute_drain_latency(dev
, 0, &plane_prec_mult
, &planea_dl
,
1352 &cursor_prec_mult
, &cursora_dl
)) {
1353 cursora_prec
= (cursor_prec_mult
== DRAIN_LATENCY_PRECISION_32
) ?
1354 DDL_CURSORA_PRECISION_32
: DDL_CURSORA_PRECISION_16
;
1355 planea_prec
= (plane_prec_mult
== DRAIN_LATENCY_PRECISION_32
) ?
1356 DDL_PLANEA_PRECISION_32
: DDL_PLANEA_PRECISION_16
;
1358 I915_WRITE(VLV_DDL1
, cursora_prec
|
1359 (cursora_dl
<< DDL_CURSORA_SHIFT
) |
1360 planea_prec
| planea_dl
);
1363 /* For plane B, Cursor B */
1364 if (vlv_compute_drain_latency(dev
, 1, &plane_prec_mult
, &planeb_dl
,
1365 &cursor_prec_mult
, &cursorb_dl
)) {
1366 cursorb_prec
= (cursor_prec_mult
== DRAIN_LATENCY_PRECISION_32
) ?
1367 DDL_CURSORB_PRECISION_32
: DDL_CURSORB_PRECISION_16
;
1368 planeb_prec
= (plane_prec_mult
== DRAIN_LATENCY_PRECISION_32
) ?
1369 DDL_PLANEB_PRECISION_32
: DDL_PLANEB_PRECISION_16
;
1371 I915_WRITE(VLV_DDL2
, cursorb_prec
|
1372 (cursorb_dl
<< DDL_CURSORB_SHIFT
) |
1373 planeb_prec
| planeb_dl
);
1377 #define single_plane_enabled(mask) is_power_of_2(mask)
1379 static void valleyview_update_wm(struct drm_crtc
*crtc
)
1381 struct drm_device
*dev
= crtc
->dev
;
1382 static const int sr_latency_ns
= 12000;
1383 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
1384 int planea_wm
, planeb_wm
, cursora_wm
, cursorb_wm
;
1385 int plane_sr
, cursor_sr
;
1386 int ignore_plane_sr
, ignore_cursor_sr
;
1387 unsigned int enabled
= 0;
1389 vlv_update_drain_latency(dev
);
1391 if (g4x_compute_wm0(dev
, PIPE_A
,
1392 &valleyview_wm_info
, latency_ns
,
1393 &valleyview_cursor_wm_info
, latency_ns
,
1394 &planea_wm
, &cursora_wm
))
1395 enabled
|= 1 << PIPE_A
;
1397 if (g4x_compute_wm0(dev
, PIPE_B
,
1398 &valleyview_wm_info
, latency_ns
,
1399 &valleyview_cursor_wm_info
, latency_ns
,
1400 &planeb_wm
, &cursorb_wm
))
1401 enabled
|= 1 << PIPE_B
;
1403 if (single_plane_enabled(enabled
) &&
1404 g4x_compute_srwm(dev
, ffs(enabled
) - 1,
1406 &valleyview_wm_info
,
1407 &valleyview_cursor_wm_info
,
1408 &plane_sr
, &ignore_cursor_sr
) &&
1409 g4x_compute_srwm(dev
, ffs(enabled
) - 1,
1411 &valleyview_wm_info
,
1412 &valleyview_cursor_wm_info
,
1413 &ignore_plane_sr
, &cursor_sr
)) {
1414 I915_WRITE(FW_BLC_SELF_VLV
, FW_CSPWRDWNEN
);
1416 I915_WRITE(FW_BLC_SELF_VLV
,
1417 I915_READ(FW_BLC_SELF_VLV
) & ~FW_CSPWRDWNEN
);
1418 plane_sr
= cursor_sr
= 0;
1421 DRM_DEBUG_KMS("Setting FIFO watermarks - A: plane=%d, cursor=%d, 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 (plane_sr
<< DSPFW_SR_SHIFT
) |
1428 (cursorb_wm
<< DSPFW_CURSORB_SHIFT
) |
1429 (planeb_wm
<< DSPFW_PLANEB_SHIFT
) |
1432 (I915_READ(DSPFW2
) & ~DSPFW_CURSORA_MASK
) |
1433 (cursora_wm
<< DSPFW_CURSORA_SHIFT
));
1435 (I915_READ(DSPFW3
) & ~DSPFW_CURSOR_SR_MASK
) |
1436 (cursor_sr
<< DSPFW_CURSOR_SR_SHIFT
));
1439 static void g4x_update_wm(struct drm_crtc
*crtc
)
1441 struct drm_device
*dev
= crtc
->dev
;
1442 static const int sr_latency_ns
= 12000;
1443 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
1444 int planea_wm
, planeb_wm
, cursora_wm
, cursorb_wm
;
1445 int plane_sr
, cursor_sr
;
1446 unsigned int enabled
= 0;
1448 if (g4x_compute_wm0(dev
, PIPE_A
,
1449 &g4x_wm_info
, latency_ns
,
1450 &g4x_cursor_wm_info
, latency_ns
,
1451 &planea_wm
, &cursora_wm
))
1452 enabled
|= 1 << PIPE_A
;
1454 if (g4x_compute_wm0(dev
, PIPE_B
,
1455 &g4x_wm_info
, latency_ns
,
1456 &g4x_cursor_wm_info
, latency_ns
,
1457 &planeb_wm
, &cursorb_wm
))
1458 enabled
|= 1 << PIPE_B
;
1460 if (single_plane_enabled(enabled
) &&
1461 g4x_compute_srwm(dev
, ffs(enabled
) - 1,
1464 &g4x_cursor_wm_info
,
1465 &plane_sr
, &cursor_sr
)) {
1466 I915_WRITE(FW_BLC_SELF
, FW_BLC_SELF_EN
);
1468 I915_WRITE(FW_BLC_SELF
,
1469 I915_READ(FW_BLC_SELF
) & ~FW_BLC_SELF_EN
);
1470 plane_sr
= cursor_sr
= 0;
1473 DRM_DEBUG_KMS("Setting FIFO watermarks - A: plane=%d, cursor=%d, B: plane=%d, cursor=%d, SR: plane=%d, cursor=%d\n",
1474 planea_wm
, cursora_wm
,
1475 planeb_wm
, cursorb_wm
,
1476 plane_sr
, cursor_sr
);
1479 (plane_sr
<< DSPFW_SR_SHIFT
) |
1480 (cursorb_wm
<< DSPFW_CURSORB_SHIFT
) |
1481 (planeb_wm
<< DSPFW_PLANEB_SHIFT
) |
1484 (I915_READ(DSPFW2
) & ~DSPFW_CURSORA_MASK
) |
1485 (cursora_wm
<< DSPFW_CURSORA_SHIFT
));
1486 /* HPLL off in SR has some issues on G4x... disable it */
1488 (I915_READ(DSPFW3
) & ~(DSPFW_HPLL_SR_EN
| DSPFW_CURSOR_SR_MASK
)) |
1489 (cursor_sr
<< DSPFW_CURSOR_SR_SHIFT
));
1492 static void i965_update_wm(struct drm_crtc
*unused_crtc
)
1494 struct drm_device
*dev
= unused_crtc
->dev
;
1495 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
1496 struct drm_crtc
*crtc
;
1500 /* Calc sr entries for one plane configs */
1501 crtc
= single_enabled_crtc(dev
);
1503 /* self-refresh has much higher latency */
1504 static const int sr_latency_ns
= 12000;
1505 const struct drm_display_mode
*adjusted_mode
=
1506 &to_intel_crtc(crtc
)->config
.adjusted_mode
;
1507 int clock
= adjusted_mode
->crtc_clock
;
1508 int htotal
= adjusted_mode
->htotal
;
1509 int hdisplay
= to_intel_crtc(crtc
)->config
.pipe_src_w
;
1510 int pixel_size
= crtc
->fb
->bits_per_pixel
/ 8;
1511 unsigned long line_time_us
;
1514 line_time_us
= ((htotal
* 1000) / clock
);
1516 /* Use ns/us then divide to preserve precision */
1517 entries
= (((sr_latency_ns
/ line_time_us
) + 1000) / 1000) *
1518 pixel_size
* hdisplay
;
1519 entries
= DIV_ROUND_UP(entries
, I915_FIFO_LINE_SIZE
);
1520 srwm
= I965_FIFO_SIZE
- entries
;
1524 DRM_DEBUG_KMS("self-refresh entries: %d, wm: %d\n",
1527 entries
= (((sr_latency_ns
/ line_time_us
) + 1000) / 1000) *
1529 entries
= DIV_ROUND_UP(entries
,
1530 i965_cursor_wm_info
.cacheline_size
);
1531 cursor_sr
= i965_cursor_wm_info
.fifo_size
-
1532 (entries
+ i965_cursor_wm_info
.guard_size
);
1534 if (cursor_sr
> i965_cursor_wm_info
.max_wm
)
1535 cursor_sr
= i965_cursor_wm_info
.max_wm
;
1537 DRM_DEBUG_KMS("self-refresh watermark: display plane %d "
1538 "cursor %d\n", srwm
, cursor_sr
);
1540 if (IS_CRESTLINE(dev
))
1541 I915_WRITE(FW_BLC_SELF
, FW_BLC_SELF_EN
);
1543 /* Turn off self refresh if both pipes are enabled */
1544 if (IS_CRESTLINE(dev
))
1545 I915_WRITE(FW_BLC_SELF
, I915_READ(FW_BLC_SELF
)
1549 DRM_DEBUG_KMS("Setting FIFO watermarks - A: 8, B: 8, C: 8, SR %d\n",
1552 /* 965 has limitations... */
1553 I915_WRITE(DSPFW1
, (srwm
<< DSPFW_SR_SHIFT
) |
1554 (8 << 16) | (8 << 8) | (8 << 0));
1555 I915_WRITE(DSPFW2
, (8 << 8) | (8 << 0));
1556 /* update cursor SR watermark */
1557 I915_WRITE(DSPFW3
, (cursor_sr
<< DSPFW_CURSOR_SR_SHIFT
));
1560 static void i9xx_update_wm(struct drm_crtc
*unused_crtc
)
1562 struct drm_device
*dev
= unused_crtc
->dev
;
1563 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
1564 const struct intel_watermark_params
*wm_info
;
1569 int planea_wm
, planeb_wm
;
1570 struct drm_crtc
*crtc
, *enabled
= NULL
;
1573 wm_info
= &i945_wm_info
;
1574 else if (!IS_GEN2(dev
))
1575 wm_info
= &i915_wm_info
;
1577 wm_info
= &i855_wm_info
;
1579 fifo_size
= dev_priv
->display
.get_fifo_size(dev
, 0);
1580 crtc
= intel_get_crtc_for_plane(dev
, 0);
1581 if (intel_crtc_active(crtc
)) {
1582 const struct drm_display_mode
*adjusted_mode
;
1583 int cpp
= crtc
->fb
->bits_per_pixel
/ 8;
1587 adjusted_mode
= &to_intel_crtc(crtc
)->config
.adjusted_mode
;
1588 planea_wm
= intel_calculate_wm(adjusted_mode
->crtc_clock
,
1589 wm_info
, fifo_size
, cpp
,
1593 planea_wm
= fifo_size
- wm_info
->guard_size
;
1595 fifo_size
= dev_priv
->display
.get_fifo_size(dev
, 1);
1596 crtc
= intel_get_crtc_for_plane(dev
, 1);
1597 if (intel_crtc_active(crtc
)) {
1598 const struct drm_display_mode
*adjusted_mode
;
1599 int cpp
= crtc
->fb
->bits_per_pixel
/ 8;
1603 adjusted_mode
= &to_intel_crtc(crtc
)->config
.adjusted_mode
;
1604 planeb_wm
= intel_calculate_wm(adjusted_mode
->crtc_clock
,
1605 wm_info
, fifo_size
, cpp
,
1607 if (enabled
== NULL
)
1612 planeb_wm
= fifo_size
- wm_info
->guard_size
;
1614 DRM_DEBUG_KMS("FIFO watermarks - A: %d, B: %d\n", planea_wm
, planeb_wm
);
1617 * Overlay gets an aggressive default since video jitter is bad.
1621 /* Play safe and disable self-refresh before adjusting watermarks. */
1622 if (IS_I945G(dev
) || IS_I945GM(dev
))
1623 I915_WRITE(FW_BLC_SELF
, FW_BLC_SELF_EN_MASK
| 0);
1624 else if (IS_I915GM(dev
))
1625 I915_WRITE(INSTPM
, I915_READ(INSTPM
) & ~INSTPM_SELF_EN
);
1627 /* Calc sr entries for one plane configs */
1628 if (HAS_FW_BLC(dev
) && enabled
) {
1629 /* self-refresh has much higher latency */
1630 static const int sr_latency_ns
= 6000;
1631 const struct drm_display_mode
*adjusted_mode
=
1632 &to_intel_crtc(enabled
)->config
.adjusted_mode
;
1633 int clock
= adjusted_mode
->crtc_clock
;
1634 int htotal
= adjusted_mode
->htotal
;
1635 int hdisplay
= to_intel_crtc(enabled
)->config
.pipe_src_w
;
1636 int pixel_size
= enabled
->fb
->bits_per_pixel
/ 8;
1637 unsigned long line_time_us
;
1640 line_time_us
= (htotal
* 1000) / clock
;
1642 /* Use ns/us then divide to preserve precision */
1643 entries
= (((sr_latency_ns
/ line_time_us
) + 1000) / 1000) *
1644 pixel_size
* hdisplay
;
1645 entries
= DIV_ROUND_UP(entries
, wm_info
->cacheline_size
);
1646 DRM_DEBUG_KMS("self-refresh entries: %d\n", entries
);
1647 srwm
= wm_info
->fifo_size
- entries
;
1651 if (IS_I945G(dev
) || IS_I945GM(dev
))
1652 I915_WRITE(FW_BLC_SELF
,
1653 FW_BLC_SELF_FIFO_MASK
| (srwm
& 0xff));
1654 else if (IS_I915GM(dev
))
1655 I915_WRITE(FW_BLC_SELF
, srwm
& 0x3f);
1658 DRM_DEBUG_KMS("Setting FIFO watermarks - A: %d, B: %d, C: %d, SR %d\n",
1659 planea_wm
, planeb_wm
, cwm
, srwm
);
1661 fwater_lo
= ((planeb_wm
& 0x3f) << 16) | (planea_wm
& 0x3f);
1662 fwater_hi
= (cwm
& 0x1f);
1664 /* Set request length to 8 cachelines per fetch */
1665 fwater_lo
= fwater_lo
| (1 << 24) | (1 << 8);
1666 fwater_hi
= fwater_hi
| (1 << 8);
1668 I915_WRITE(FW_BLC
, fwater_lo
);
1669 I915_WRITE(FW_BLC2
, fwater_hi
);
1671 if (HAS_FW_BLC(dev
)) {
1673 if (IS_I945G(dev
) || IS_I945GM(dev
))
1674 I915_WRITE(FW_BLC_SELF
,
1675 FW_BLC_SELF_EN_MASK
| FW_BLC_SELF_EN
);
1676 else if (IS_I915GM(dev
))
1677 I915_WRITE(INSTPM
, I915_READ(INSTPM
) | INSTPM_SELF_EN
);
1678 DRM_DEBUG_KMS("memory self refresh enabled\n");
1680 DRM_DEBUG_KMS("memory self refresh disabled\n");
1684 static void i830_update_wm(struct drm_crtc
*unused_crtc
)
1686 struct drm_device
*dev
= unused_crtc
->dev
;
1687 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
1688 struct drm_crtc
*crtc
;
1689 const struct drm_display_mode
*adjusted_mode
;
1693 crtc
= single_enabled_crtc(dev
);
1697 adjusted_mode
= &to_intel_crtc(crtc
)->config
.adjusted_mode
;
1698 planea_wm
= intel_calculate_wm(adjusted_mode
->crtc_clock
,
1700 dev_priv
->display
.get_fifo_size(dev
, 0),
1702 fwater_lo
= I915_READ(FW_BLC
) & ~0xfff;
1703 fwater_lo
|= (3<<8) | planea_wm
;
1705 DRM_DEBUG_KMS("Setting FIFO watermarks - A: %d\n", planea_wm
);
1707 I915_WRITE(FW_BLC
, fwater_lo
);
1711 * Check the wm result.
1713 * If any calculated watermark values is larger than the maximum value that
1714 * can be programmed into the associated watermark register, that watermark
1717 static bool ironlake_check_srwm(struct drm_device
*dev
, int level
,
1718 int fbc_wm
, int display_wm
, int cursor_wm
,
1719 const struct intel_watermark_params
*display
,
1720 const struct intel_watermark_params
*cursor
)
1722 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
1724 DRM_DEBUG_KMS("watermark %d: display plane %d, fbc lines %d,"
1725 " cursor %d\n", level
, display_wm
, fbc_wm
, cursor_wm
);
1727 if (fbc_wm
> SNB_FBC_MAX_SRWM
) {
1728 DRM_DEBUG_KMS("fbc watermark(%d) is too large(%d), disabling wm%d+\n",
1729 fbc_wm
, SNB_FBC_MAX_SRWM
, level
);
1731 /* fbc has it's own way to disable FBC WM */
1732 I915_WRITE(DISP_ARB_CTL
,
1733 I915_READ(DISP_ARB_CTL
) | DISP_FBC_WM_DIS
);
1735 } else if (INTEL_INFO(dev
)->gen
>= 6) {
1736 /* enable FBC WM (except on ILK, where it must remain off) */
1737 I915_WRITE(DISP_ARB_CTL
,
1738 I915_READ(DISP_ARB_CTL
) & ~DISP_FBC_WM_DIS
);
1741 if (display_wm
> display
->max_wm
) {
1742 DRM_DEBUG_KMS("display watermark(%d) is too large(%d), disabling wm%d+\n",
1743 display_wm
, SNB_DISPLAY_MAX_SRWM
, level
);
1747 if (cursor_wm
> cursor
->max_wm
) {
1748 DRM_DEBUG_KMS("cursor watermark(%d) is too large(%d), disabling wm%d+\n",
1749 cursor_wm
, SNB_CURSOR_MAX_SRWM
, level
);
1753 if (!(fbc_wm
|| display_wm
|| cursor_wm
)) {
1754 DRM_DEBUG_KMS("latency %d is 0, disabling wm%d+\n", level
, level
);
1762 * Compute watermark values of WM[1-3],
1764 static bool ironlake_compute_srwm(struct drm_device
*dev
, int level
, int plane
,
1766 const struct intel_watermark_params
*display
,
1767 const struct intel_watermark_params
*cursor
,
1768 int *fbc_wm
, int *display_wm
, int *cursor_wm
)
1770 struct drm_crtc
*crtc
;
1771 const struct drm_display_mode
*adjusted_mode
;
1772 unsigned long line_time_us
;
1773 int hdisplay
, htotal
, pixel_size
, clock
;
1774 int line_count
, line_size
;
1779 *fbc_wm
= *display_wm
= *cursor_wm
= 0;
1783 crtc
= intel_get_crtc_for_plane(dev
, plane
);
1784 adjusted_mode
= &to_intel_crtc(crtc
)->config
.adjusted_mode
;
1785 clock
= adjusted_mode
->crtc_clock
;
1786 htotal
= adjusted_mode
->htotal
;
1787 hdisplay
= to_intel_crtc(crtc
)->config
.pipe_src_w
;
1788 pixel_size
= crtc
->fb
->bits_per_pixel
/ 8;
1790 line_time_us
= (htotal
* 1000) / clock
;
1791 line_count
= (latency_ns
/ line_time_us
+ 1000) / 1000;
1792 line_size
= hdisplay
* pixel_size
;
1794 /* Use the minimum of the small and large buffer method for primary */
1795 small
= ((clock
* pixel_size
/ 1000) * latency_ns
) / 1000;
1796 large
= line_count
* line_size
;
1798 entries
= DIV_ROUND_UP(min(small
, large
), display
->cacheline_size
);
1799 *display_wm
= entries
+ display
->guard_size
;
1803 * FBC WM = ((Final Primary WM * 64) / number of bytes per line) + 2
1805 *fbc_wm
= DIV_ROUND_UP(*display_wm
* 64, line_size
) + 2;
1807 /* calculate the self-refresh watermark for display cursor */
1808 entries
= line_count
* pixel_size
* 64;
1809 entries
= DIV_ROUND_UP(entries
, cursor
->cacheline_size
);
1810 *cursor_wm
= entries
+ cursor
->guard_size
;
1812 return ironlake_check_srwm(dev
, level
,
1813 *fbc_wm
, *display_wm
, *cursor_wm
,
1817 static void ironlake_update_wm(struct drm_crtc
*crtc
)
1819 struct drm_device
*dev
= crtc
->dev
;
1820 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
1821 int fbc_wm
, plane_wm
, cursor_wm
;
1822 unsigned int enabled
;
1825 if (g4x_compute_wm0(dev
, PIPE_A
,
1826 &ironlake_display_wm_info
,
1827 dev_priv
->wm
.pri_latency
[0] * 100,
1828 &ironlake_cursor_wm_info
,
1829 dev_priv
->wm
.cur_latency
[0] * 100,
1830 &plane_wm
, &cursor_wm
)) {
1831 I915_WRITE(WM0_PIPEA_ILK
,
1832 (plane_wm
<< WM0_PIPE_PLANE_SHIFT
) | cursor_wm
);
1833 DRM_DEBUG_KMS("FIFO watermarks For pipe A -"
1834 " plane %d, " "cursor: %d\n",
1835 plane_wm
, cursor_wm
);
1836 enabled
|= 1 << PIPE_A
;
1839 if (g4x_compute_wm0(dev
, PIPE_B
,
1840 &ironlake_display_wm_info
,
1841 dev_priv
->wm
.pri_latency
[0] * 100,
1842 &ironlake_cursor_wm_info
,
1843 dev_priv
->wm
.cur_latency
[0] * 100,
1844 &plane_wm
, &cursor_wm
)) {
1845 I915_WRITE(WM0_PIPEB_ILK
,
1846 (plane_wm
<< WM0_PIPE_PLANE_SHIFT
) | cursor_wm
);
1847 DRM_DEBUG_KMS("FIFO watermarks For pipe B -"
1848 " plane %d, cursor: %d\n",
1849 plane_wm
, cursor_wm
);
1850 enabled
|= 1 << PIPE_B
;
1854 * Calculate and update the self-refresh watermark only when one
1855 * display plane is used.
1857 I915_WRITE(WM3_LP_ILK
, 0);
1858 I915_WRITE(WM2_LP_ILK
, 0);
1859 I915_WRITE(WM1_LP_ILK
, 0);
1861 if (!single_plane_enabled(enabled
))
1863 enabled
= ffs(enabled
) - 1;
1866 if (!ironlake_compute_srwm(dev
, 1, enabled
,
1867 dev_priv
->wm
.pri_latency
[1] * 500,
1868 &ironlake_display_srwm_info
,
1869 &ironlake_cursor_srwm_info
,
1870 &fbc_wm
, &plane_wm
, &cursor_wm
))
1873 I915_WRITE(WM1_LP_ILK
,
1875 (dev_priv
->wm
.pri_latency
[1] << WM1_LP_LATENCY_SHIFT
) |
1876 (fbc_wm
<< WM1_LP_FBC_SHIFT
) |
1877 (plane_wm
<< WM1_LP_SR_SHIFT
) |
1881 if (!ironlake_compute_srwm(dev
, 2, enabled
,
1882 dev_priv
->wm
.pri_latency
[2] * 500,
1883 &ironlake_display_srwm_info
,
1884 &ironlake_cursor_srwm_info
,
1885 &fbc_wm
, &plane_wm
, &cursor_wm
))
1888 I915_WRITE(WM2_LP_ILK
,
1890 (dev_priv
->wm
.pri_latency
[2] << WM1_LP_LATENCY_SHIFT
) |
1891 (fbc_wm
<< WM1_LP_FBC_SHIFT
) |
1892 (plane_wm
<< WM1_LP_SR_SHIFT
) |
1896 * WM3 is unsupported on ILK, probably because we don't have latency
1897 * data for that power state
1901 static void sandybridge_update_wm(struct drm_crtc
*crtc
)
1903 struct drm_device
*dev
= crtc
->dev
;
1904 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
1905 int latency
= dev_priv
->wm
.pri_latency
[0] * 100; /* In unit 0.1us */
1907 int fbc_wm
, plane_wm
, cursor_wm
;
1908 unsigned int enabled
;
1911 if (g4x_compute_wm0(dev
, PIPE_A
,
1912 &sandybridge_display_wm_info
, latency
,
1913 &sandybridge_cursor_wm_info
, latency
,
1914 &plane_wm
, &cursor_wm
)) {
1915 val
= I915_READ(WM0_PIPEA_ILK
);
1916 val
&= ~(WM0_PIPE_PLANE_MASK
| WM0_PIPE_CURSOR_MASK
);
1917 I915_WRITE(WM0_PIPEA_ILK
, val
|
1918 ((plane_wm
<< WM0_PIPE_PLANE_SHIFT
) | cursor_wm
));
1919 DRM_DEBUG_KMS("FIFO watermarks For pipe A -"
1920 " plane %d, " "cursor: %d\n",
1921 plane_wm
, cursor_wm
);
1922 enabled
|= 1 << PIPE_A
;
1925 if (g4x_compute_wm0(dev
, PIPE_B
,
1926 &sandybridge_display_wm_info
, latency
,
1927 &sandybridge_cursor_wm_info
, latency
,
1928 &plane_wm
, &cursor_wm
)) {
1929 val
= I915_READ(WM0_PIPEB_ILK
);
1930 val
&= ~(WM0_PIPE_PLANE_MASK
| WM0_PIPE_CURSOR_MASK
);
1931 I915_WRITE(WM0_PIPEB_ILK
, val
|
1932 ((plane_wm
<< WM0_PIPE_PLANE_SHIFT
) | cursor_wm
));
1933 DRM_DEBUG_KMS("FIFO watermarks For pipe B -"
1934 " plane %d, cursor: %d\n",
1935 plane_wm
, cursor_wm
);
1936 enabled
|= 1 << PIPE_B
;
1940 * Calculate and update the self-refresh watermark only when one
1941 * display plane is used.
1943 * SNB support 3 levels of watermark.
1945 * WM1/WM2/WM2 watermarks have to be enabled in the ascending order,
1946 * and disabled in the descending order
1949 I915_WRITE(WM3_LP_ILK
, 0);
1950 I915_WRITE(WM2_LP_ILK
, 0);
1951 I915_WRITE(WM1_LP_ILK
, 0);
1953 if (!single_plane_enabled(enabled
) ||
1954 dev_priv
->sprite_scaling_enabled
)
1956 enabled
= ffs(enabled
) - 1;
1959 if (!ironlake_compute_srwm(dev
, 1, enabled
,
1960 dev_priv
->wm
.pri_latency
[1] * 500,
1961 &sandybridge_display_srwm_info
,
1962 &sandybridge_cursor_srwm_info
,
1963 &fbc_wm
, &plane_wm
, &cursor_wm
))
1966 I915_WRITE(WM1_LP_ILK
,
1968 (dev_priv
->wm
.pri_latency
[1] << WM1_LP_LATENCY_SHIFT
) |
1969 (fbc_wm
<< WM1_LP_FBC_SHIFT
) |
1970 (plane_wm
<< WM1_LP_SR_SHIFT
) |
1974 if (!ironlake_compute_srwm(dev
, 2, enabled
,
1975 dev_priv
->wm
.pri_latency
[2] * 500,
1976 &sandybridge_display_srwm_info
,
1977 &sandybridge_cursor_srwm_info
,
1978 &fbc_wm
, &plane_wm
, &cursor_wm
))
1981 I915_WRITE(WM2_LP_ILK
,
1983 (dev_priv
->wm
.pri_latency
[2] << WM1_LP_LATENCY_SHIFT
) |
1984 (fbc_wm
<< WM1_LP_FBC_SHIFT
) |
1985 (plane_wm
<< WM1_LP_SR_SHIFT
) |
1989 if (!ironlake_compute_srwm(dev
, 3, enabled
,
1990 dev_priv
->wm
.pri_latency
[3] * 500,
1991 &sandybridge_display_srwm_info
,
1992 &sandybridge_cursor_srwm_info
,
1993 &fbc_wm
, &plane_wm
, &cursor_wm
))
1996 I915_WRITE(WM3_LP_ILK
,
1998 (dev_priv
->wm
.pri_latency
[3] << WM1_LP_LATENCY_SHIFT
) |
1999 (fbc_wm
<< WM1_LP_FBC_SHIFT
) |
2000 (plane_wm
<< WM1_LP_SR_SHIFT
) |
2004 static void ivybridge_update_wm(struct drm_crtc
*crtc
)
2006 struct drm_device
*dev
= crtc
->dev
;
2007 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
2008 int latency
= dev_priv
->wm
.pri_latency
[0] * 100; /* In unit 0.1us */
2010 int fbc_wm
, plane_wm
, cursor_wm
;
2011 int ignore_fbc_wm
, ignore_plane_wm
, ignore_cursor_wm
;
2012 unsigned int enabled
;
2015 if (g4x_compute_wm0(dev
, PIPE_A
,
2016 &sandybridge_display_wm_info
, latency
,
2017 &sandybridge_cursor_wm_info
, latency
,
2018 &plane_wm
, &cursor_wm
)) {
2019 val
= I915_READ(WM0_PIPEA_ILK
);
2020 val
&= ~(WM0_PIPE_PLANE_MASK
| WM0_PIPE_CURSOR_MASK
);
2021 I915_WRITE(WM0_PIPEA_ILK
, val
|
2022 ((plane_wm
<< WM0_PIPE_PLANE_SHIFT
) | cursor_wm
));
2023 DRM_DEBUG_KMS("FIFO watermarks For pipe A -"
2024 " plane %d, " "cursor: %d\n",
2025 plane_wm
, cursor_wm
);
2026 enabled
|= 1 << PIPE_A
;
2029 if (g4x_compute_wm0(dev
, PIPE_B
,
2030 &sandybridge_display_wm_info
, latency
,
2031 &sandybridge_cursor_wm_info
, latency
,
2032 &plane_wm
, &cursor_wm
)) {
2033 val
= I915_READ(WM0_PIPEB_ILK
);
2034 val
&= ~(WM0_PIPE_PLANE_MASK
| WM0_PIPE_CURSOR_MASK
);
2035 I915_WRITE(WM0_PIPEB_ILK
, val
|
2036 ((plane_wm
<< WM0_PIPE_PLANE_SHIFT
) | cursor_wm
));
2037 DRM_DEBUG_KMS("FIFO watermarks For pipe B -"
2038 " plane %d, cursor: %d\n",
2039 plane_wm
, cursor_wm
);
2040 enabled
|= 1 << PIPE_B
;
2043 if (g4x_compute_wm0(dev
, PIPE_C
,
2044 &sandybridge_display_wm_info
, latency
,
2045 &sandybridge_cursor_wm_info
, latency
,
2046 &plane_wm
, &cursor_wm
)) {
2047 val
= I915_READ(WM0_PIPEC_IVB
);
2048 val
&= ~(WM0_PIPE_PLANE_MASK
| WM0_PIPE_CURSOR_MASK
);
2049 I915_WRITE(WM0_PIPEC_IVB
, val
|
2050 ((plane_wm
<< WM0_PIPE_PLANE_SHIFT
) | cursor_wm
));
2051 DRM_DEBUG_KMS("FIFO watermarks For pipe C -"
2052 " plane %d, cursor: %d\n",
2053 plane_wm
, cursor_wm
);
2054 enabled
|= 1 << PIPE_C
;
2058 * Calculate and update the self-refresh watermark only when one
2059 * display plane is used.
2061 * SNB support 3 levels of watermark.
2063 * WM1/WM2/WM2 watermarks have to be enabled in the ascending order,
2064 * and disabled in the descending order
2067 I915_WRITE(WM3_LP_ILK
, 0);
2068 I915_WRITE(WM2_LP_ILK
, 0);
2069 I915_WRITE(WM1_LP_ILK
, 0);
2071 if (!single_plane_enabled(enabled
) ||
2072 dev_priv
->sprite_scaling_enabled
)
2074 enabled
= ffs(enabled
) - 1;
2077 if (!ironlake_compute_srwm(dev
, 1, enabled
,
2078 dev_priv
->wm
.pri_latency
[1] * 500,
2079 &sandybridge_display_srwm_info
,
2080 &sandybridge_cursor_srwm_info
,
2081 &fbc_wm
, &plane_wm
, &cursor_wm
))
2084 I915_WRITE(WM1_LP_ILK
,
2086 (dev_priv
->wm
.pri_latency
[1] << WM1_LP_LATENCY_SHIFT
) |
2087 (fbc_wm
<< WM1_LP_FBC_SHIFT
) |
2088 (plane_wm
<< WM1_LP_SR_SHIFT
) |
2092 if (!ironlake_compute_srwm(dev
, 2, enabled
,
2093 dev_priv
->wm
.pri_latency
[2] * 500,
2094 &sandybridge_display_srwm_info
,
2095 &sandybridge_cursor_srwm_info
,
2096 &fbc_wm
, &plane_wm
, &cursor_wm
))
2099 I915_WRITE(WM2_LP_ILK
,
2101 (dev_priv
->wm
.pri_latency
[2] << WM1_LP_LATENCY_SHIFT
) |
2102 (fbc_wm
<< WM1_LP_FBC_SHIFT
) |
2103 (plane_wm
<< WM1_LP_SR_SHIFT
) |
2106 /* WM3, note we have to correct the cursor latency */
2107 if (!ironlake_compute_srwm(dev
, 3, enabled
,
2108 dev_priv
->wm
.pri_latency
[3] * 500,
2109 &sandybridge_display_srwm_info
,
2110 &sandybridge_cursor_srwm_info
,
2111 &fbc_wm
, &plane_wm
, &ignore_cursor_wm
) ||
2112 !ironlake_compute_srwm(dev
, 3, enabled
,
2113 dev_priv
->wm
.cur_latency
[3] * 500,
2114 &sandybridge_display_srwm_info
,
2115 &sandybridge_cursor_srwm_info
,
2116 &ignore_fbc_wm
, &ignore_plane_wm
, &cursor_wm
))
2119 I915_WRITE(WM3_LP_ILK
,
2121 (dev_priv
->wm
.pri_latency
[3] << WM1_LP_LATENCY_SHIFT
) |
2122 (fbc_wm
<< WM1_LP_FBC_SHIFT
) |
2123 (plane_wm
<< WM1_LP_SR_SHIFT
) |
2127 static uint32_t ilk_pipe_pixel_rate(struct drm_device
*dev
,
2128 struct drm_crtc
*crtc
)
2130 struct intel_crtc
*intel_crtc
= to_intel_crtc(crtc
);
2131 uint32_t pixel_rate
;
2133 pixel_rate
= intel_crtc
->config
.adjusted_mode
.crtc_clock
;
2135 /* We only use IF-ID interlacing. If we ever use PF-ID we'll need to
2136 * adjust the pixel_rate here. */
2138 if (intel_crtc
->config
.pch_pfit
.enabled
) {
2139 uint64_t pipe_w
, pipe_h
, pfit_w
, pfit_h
;
2140 uint32_t pfit_size
= intel_crtc
->config
.pch_pfit
.size
;
2142 pipe_w
= intel_crtc
->config
.pipe_src_w
;
2143 pipe_h
= intel_crtc
->config
.pipe_src_h
;
2144 pfit_w
= (pfit_size
>> 16) & 0xFFFF;
2145 pfit_h
= pfit_size
& 0xFFFF;
2146 if (pipe_w
< pfit_w
)
2148 if (pipe_h
< pfit_h
)
2151 pixel_rate
= div_u64((uint64_t) pixel_rate
* pipe_w
* pipe_h
,
2158 /* latency must be in 0.1us units. */
2159 static uint32_t ilk_wm_method1(uint32_t pixel_rate
, uint8_t bytes_per_pixel
,
2164 if (WARN(latency
== 0, "Latency value missing\n"))
2167 ret
= (uint64_t) pixel_rate
* bytes_per_pixel
* latency
;
2168 ret
= DIV_ROUND_UP_ULL(ret
, 64 * 10000) + 2;
2173 /* latency must be in 0.1us units. */
2174 static uint32_t ilk_wm_method2(uint32_t pixel_rate
, uint32_t pipe_htotal
,
2175 uint32_t horiz_pixels
, uint8_t bytes_per_pixel
,
2180 if (WARN(latency
== 0, "Latency value missing\n"))
2183 ret
= (latency
* pixel_rate
) / (pipe_htotal
* 10000);
2184 ret
= (ret
+ 1) * horiz_pixels
* bytes_per_pixel
;
2185 ret
= DIV_ROUND_UP(ret
, 64) + 2;
2189 static uint32_t ilk_wm_fbc(uint32_t pri_val
, uint32_t horiz_pixels
,
2190 uint8_t bytes_per_pixel
)
2192 return DIV_ROUND_UP(pri_val
* 64, horiz_pixels
* bytes_per_pixel
) + 2;
2195 struct hsw_pipe_wm_parameters
{
2197 uint32_t pipe_htotal
;
2198 uint32_t pixel_rate
;
2199 struct intel_plane_wm_parameters pri
;
2200 struct intel_plane_wm_parameters spr
;
2201 struct intel_plane_wm_parameters cur
;
2204 struct hsw_wm_maximums
{
2211 /* used in computing the new watermarks state */
2212 struct intel_wm_config
{
2213 unsigned int num_pipes_active
;
2214 bool sprites_enabled
;
2215 bool sprites_scaled
;
2219 * For both WM_PIPE and WM_LP.
2220 * mem_value must be in 0.1us units.
2222 static uint32_t ilk_compute_pri_wm(const struct hsw_pipe_wm_parameters
*params
,
2226 uint32_t method1
, method2
;
2228 if (!params
->active
|| !params
->pri
.enabled
)
2231 method1
= ilk_wm_method1(params
->pixel_rate
,
2232 params
->pri
.bytes_per_pixel
,
2238 method2
= ilk_wm_method2(params
->pixel_rate
,
2239 params
->pipe_htotal
,
2240 params
->pri
.horiz_pixels
,
2241 params
->pri
.bytes_per_pixel
,
2244 return min(method1
, method2
);
2248 * For both WM_PIPE and WM_LP.
2249 * mem_value must be in 0.1us units.
2251 static uint32_t ilk_compute_spr_wm(const struct hsw_pipe_wm_parameters
*params
,
2254 uint32_t method1
, method2
;
2256 if (!params
->active
|| !params
->spr
.enabled
)
2259 method1
= ilk_wm_method1(params
->pixel_rate
,
2260 params
->spr
.bytes_per_pixel
,
2262 method2
= ilk_wm_method2(params
->pixel_rate
,
2263 params
->pipe_htotal
,
2264 params
->spr
.horiz_pixels
,
2265 params
->spr
.bytes_per_pixel
,
2267 return min(method1
, method2
);
2271 * For both WM_PIPE and WM_LP.
2272 * mem_value must be in 0.1us units.
2274 static uint32_t ilk_compute_cur_wm(const struct hsw_pipe_wm_parameters
*params
,
2277 if (!params
->active
|| !params
->cur
.enabled
)
2280 return ilk_wm_method2(params
->pixel_rate
,
2281 params
->pipe_htotal
,
2282 params
->cur
.horiz_pixels
,
2283 params
->cur
.bytes_per_pixel
,
2287 /* Only for WM_LP. */
2288 static uint32_t ilk_compute_fbc_wm(const struct hsw_pipe_wm_parameters
*params
,
2291 if (!params
->active
|| !params
->pri
.enabled
)
2294 return ilk_wm_fbc(pri_val
,
2295 params
->pri
.horiz_pixels
,
2296 params
->pri
.bytes_per_pixel
);
2299 static unsigned int ilk_display_fifo_size(const struct drm_device
*dev
)
2301 if (INTEL_INFO(dev
)->gen
>= 8)
2303 else if (INTEL_INFO(dev
)->gen
>= 7)
2309 /* Calculate the maximum primary/sprite plane watermark */
2310 static unsigned int ilk_plane_wm_max(const struct drm_device
*dev
,
2312 const struct intel_wm_config
*config
,
2313 enum intel_ddb_partitioning ddb_partitioning
,
2316 unsigned int fifo_size
= ilk_display_fifo_size(dev
);
2319 /* if sprites aren't enabled, sprites get nothing */
2320 if (is_sprite
&& !config
->sprites_enabled
)
2323 /* HSW allows LP1+ watermarks even with multiple pipes */
2324 if (level
== 0 || config
->num_pipes_active
> 1) {
2325 fifo_size
/= INTEL_INFO(dev
)->num_pipes
;
2328 * For some reason the non self refresh
2329 * FIFO size is only half of the self
2330 * refresh FIFO size on ILK/SNB.
2332 if (INTEL_INFO(dev
)->gen
<= 6)
2336 if (config
->sprites_enabled
) {
2337 /* level 0 is always calculated with 1:1 split */
2338 if (level
> 0 && ddb_partitioning
== INTEL_DDB_PART_5_6
) {
2347 /* clamp to max that the registers can hold */
2348 if (INTEL_INFO(dev
)->gen
>= 8)
2349 max
= level
== 0 ? 255 : 2047;
2350 else if (INTEL_INFO(dev
)->gen
>= 7)
2351 /* IVB/HSW primary/sprite plane watermarks */
2352 max
= level
== 0 ? 127 : 1023;
2353 else if (!is_sprite
)
2354 /* ILK/SNB primary plane watermarks */
2355 max
= level
== 0 ? 127 : 511;
2357 /* ILK/SNB sprite plane watermarks */
2358 max
= level
== 0 ? 63 : 255;
2360 return min(fifo_size
, max
);
2363 /* Calculate the maximum cursor plane watermark */
2364 static unsigned int ilk_cursor_wm_max(const struct drm_device
*dev
,
2366 const struct intel_wm_config
*config
)
2368 /* HSW LP1+ watermarks w/ multiple pipes */
2369 if (level
> 0 && config
->num_pipes_active
> 1)
2372 /* otherwise just report max that registers can hold */
2373 if (INTEL_INFO(dev
)->gen
>= 7)
2374 return level
== 0 ? 63 : 255;
2376 return level
== 0 ? 31 : 63;
2379 /* Calculate the maximum FBC watermark */
2380 static unsigned int ilk_fbc_wm_max(struct drm_device
*dev
)
2382 /* max that registers can hold */
2383 if (INTEL_INFO(dev
)->gen
>= 8)
2389 static void ilk_compute_wm_maximums(struct drm_device
*dev
,
2391 const struct intel_wm_config
*config
,
2392 enum intel_ddb_partitioning ddb_partitioning
,
2393 struct hsw_wm_maximums
*max
)
2395 max
->pri
= ilk_plane_wm_max(dev
, level
, config
, ddb_partitioning
, false);
2396 max
->spr
= ilk_plane_wm_max(dev
, level
, config
, ddb_partitioning
, true);
2397 max
->cur
= ilk_cursor_wm_max(dev
, level
, config
);
2398 max
->fbc
= ilk_fbc_wm_max(dev
);
2401 static bool ilk_validate_wm_level(int level
,
2402 const struct hsw_wm_maximums
*max
,
2403 struct intel_wm_level
*result
)
2407 /* already determined to be invalid? */
2408 if (!result
->enable
)
2411 result
->enable
= result
->pri_val
<= max
->pri
&&
2412 result
->spr_val
<= max
->spr
&&
2413 result
->cur_val
<= max
->cur
;
2415 ret
= result
->enable
;
2418 * HACK until we can pre-compute everything,
2419 * and thus fail gracefully if LP0 watermarks
2422 if (level
== 0 && !result
->enable
) {
2423 if (result
->pri_val
> max
->pri
)
2424 DRM_DEBUG_KMS("Primary WM%d too large %u (max %u)\n",
2425 level
, result
->pri_val
, max
->pri
);
2426 if (result
->spr_val
> max
->spr
)
2427 DRM_DEBUG_KMS("Sprite WM%d too large %u (max %u)\n",
2428 level
, result
->spr_val
, max
->spr
);
2429 if (result
->cur_val
> max
->cur
)
2430 DRM_DEBUG_KMS("Cursor WM%d too large %u (max %u)\n",
2431 level
, result
->cur_val
, max
->cur
);
2433 result
->pri_val
= min_t(uint32_t, result
->pri_val
, max
->pri
);
2434 result
->spr_val
= min_t(uint32_t, result
->spr_val
, max
->spr
);
2435 result
->cur_val
= min_t(uint32_t, result
->cur_val
, max
->cur
);
2436 result
->enable
= true;
2442 static void ilk_compute_wm_level(struct drm_i915_private
*dev_priv
,
2444 const struct hsw_pipe_wm_parameters
*p
,
2445 struct intel_wm_level
*result
)
2447 uint16_t pri_latency
= dev_priv
->wm
.pri_latency
[level
];
2448 uint16_t spr_latency
= dev_priv
->wm
.spr_latency
[level
];
2449 uint16_t cur_latency
= dev_priv
->wm
.cur_latency
[level
];
2451 /* WM1+ latency values stored in 0.5us units */
2458 result
->pri_val
= ilk_compute_pri_wm(p
, pri_latency
, level
);
2459 result
->spr_val
= ilk_compute_spr_wm(p
, spr_latency
);
2460 result
->cur_val
= ilk_compute_cur_wm(p
, cur_latency
);
2461 result
->fbc_val
= ilk_compute_fbc_wm(p
, result
->pri_val
);
2462 result
->enable
= true;
2466 hsw_compute_linetime_wm(struct drm_device
*dev
, struct drm_crtc
*crtc
)
2468 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
2469 struct intel_crtc
*intel_crtc
= to_intel_crtc(crtc
);
2470 struct drm_display_mode
*mode
= &intel_crtc
->config
.adjusted_mode
;
2471 u32 linetime
, ips_linetime
;
2473 if (!intel_crtc_active(crtc
))
2476 /* The WM are computed with base on how long it takes to fill a single
2477 * row at the given clock rate, multiplied by 8.
2479 linetime
= DIV_ROUND_CLOSEST(mode
->htotal
* 1000 * 8, mode
->clock
);
2480 ips_linetime
= DIV_ROUND_CLOSEST(mode
->htotal
* 1000 * 8,
2481 intel_ddi_get_cdclk_freq(dev_priv
));
2483 return PIPE_WM_LINETIME_IPS_LINETIME(ips_linetime
) |
2484 PIPE_WM_LINETIME_TIME(linetime
);
2487 static void intel_read_wm_latency(struct drm_device
*dev
, uint16_t wm
[5])
2489 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
2491 if (IS_HASWELL(dev
)) {
2492 uint64_t sskpd
= I915_READ64(MCH_SSKPD
);
2494 wm
[0] = (sskpd
>> 56) & 0xFF;
2496 wm
[0] = sskpd
& 0xF;
2497 wm
[1] = (sskpd
>> 4) & 0xFF;
2498 wm
[2] = (sskpd
>> 12) & 0xFF;
2499 wm
[3] = (sskpd
>> 20) & 0x1FF;
2500 wm
[4] = (sskpd
>> 32) & 0x1FF;
2501 } else if (INTEL_INFO(dev
)->gen
>= 6) {
2502 uint32_t sskpd
= I915_READ(MCH_SSKPD
);
2504 wm
[0] = (sskpd
>> SSKPD_WM0_SHIFT
) & SSKPD_WM_MASK
;
2505 wm
[1] = (sskpd
>> SSKPD_WM1_SHIFT
) & SSKPD_WM_MASK
;
2506 wm
[2] = (sskpd
>> SSKPD_WM2_SHIFT
) & SSKPD_WM_MASK
;
2507 wm
[3] = (sskpd
>> SSKPD_WM3_SHIFT
) & SSKPD_WM_MASK
;
2508 } else if (INTEL_INFO(dev
)->gen
>= 5) {
2509 uint32_t mltr
= I915_READ(MLTR_ILK
);
2511 /* ILK primary LP0 latency is 700 ns */
2513 wm
[1] = (mltr
>> MLTR_WM1_SHIFT
) & ILK_SRLT_MASK
;
2514 wm
[2] = (mltr
>> MLTR_WM2_SHIFT
) & ILK_SRLT_MASK
;
2518 static void intel_fixup_spr_wm_latency(struct drm_device
*dev
, uint16_t wm
[5])
2520 /* ILK sprite LP0 latency is 1300 ns */
2521 if (INTEL_INFO(dev
)->gen
== 5)
2525 static void intel_fixup_cur_wm_latency(struct drm_device
*dev
, uint16_t wm
[5])
2527 /* ILK cursor LP0 latency is 1300 ns */
2528 if (INTEL_INFO(dev
)->gen
== 5)
2531 /* WaDoubleCursorLP3Latency:ivb */
2532 if (IS_IVYBRIDGE(dev
))
2536 static int ilk_wm_max_level(const struct drm_device
*dev
)
2538 /* how many WM levels are we expecting */
2539 if (IS_HASWELL(dev
))
2541 else if (INTEL_INFO(dev
)->gen
>= 6)
2547 static void intel_print_wm_latency(struct drm_device
*dev
,
2549 const uint16_t wm
[5])
2551 int level
, max_level
= ilk_wm_max_level(dev
);
2553 for (level
= 0; level
<= max_level
; level
++) {
2554 unsigned int latency
= wm
[level
];
2557 DRM_ERROR("%s WM%d latency not provided\n",
2562 /* WM1+ latency values in 0.5us units */
2566 DRM_DEBUG_KMS("%s WM%d latency %u (%u.%u usec)\n",
2567 name
, level
, wm
[level
],
2568 latency
/ 10, latency
% 10);
2572 static void intel_setup_wm_latency(struct drm_device
*dev
)
2574 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
2576 intel_read_wm_latency(dev
, dev_priv
->wm
.pri_latency
);
2578 memcpy(dev_priv
->wm
.spr_latency
, dev_priv
->wm
.pri_latency
,
2579 sizeof(dev_priv
->wm
.pri_latency
));
2580 memcpy(dev_priv
->wm
.cur_latency
, dev_priv
->wm
.pri_latency
,
2581 sizeof(dev_priv
->wm
.pri_latency
));
2583 intel_fixup_spr_wm_latency(dev
, dev_priv
->wm
.spr_latency
);
2584 intel_fixup_cur_wm_latency(dev
, dev_priv
->wm
.cur_latency
);
2586 intel_print_wm_latency(dev
, "Primary", dev_priv
->wm
.pri_latency
);
2587 intel_print_wm_latency(dev
, "Sprite", dev_priv
->wm
.spr_latency
);
2588 intel_print_wm_latency(dev
, "Cursor", dev_priv
->wm
.cur_latency
);
2591 static void hsw_compute_wm_parameters(struct drm_crtc
*crtc
,
2592 struct hsw_pipe_wm_parameters
*p
,
2593 struct intel_wm_config
*config
)
2595 struct drm_device
*dev
= crtc
->dev
;
2596 struct intel_crtc
*intel_crtc
= to_intel_crtc(crtc
);
2597 enum pipe pipe
= intel_crtc
->pipe
;
2598 struct drm_plane
*plane
;
2600 p
->active
= intel_crtc_active(crtc
);
2602 p
->pipe_htotal
= intel_crtc
->config
.adjusted_mode
.htotal
;
2603 p
->pixel_rate
= ilk_pipe_pixel_rate(dev
, crtc
);
2604 p
->pri
.bytes_per_pixel
= crtc
->fb
->bits_per_pixel
/ 8;
2605 p
->cur
.bytes_per_pixel
= 4;
2606 p
->pri
.horiz_pixels
= intel_crtc
->config
.pipe_src_w
;
2607 p
->cur
.horiz_pixels
= 64;
2608 /* TODO: for now, assume primary and cursor planes are always enabled. */
2609 p
->pri
.enabled
= true;
2610 p
->cur
.enabled
= true;
2613 list_for_each_entry(crtc
, &dev
->mode_config
.crtc_list
, head
)
2614 config
->num_pipes_active
+= intel_crtc_active(crtc
);
2616 list_for_each_entry(plane
, &dev
->mode_config
.plane_list
, head
) {
2617 struct intel_plane
*intel_plane
= to_intel_plane(plane
);
2619 if (intel_plane
->pipe
== pipe
)
2620 p
->spr
= intel_plane
->wm
;
2622 config
->sprites_enabled
|= intel_plane
->wm
.enabled
;
2623 config
->sprites_scaled
|= intel_plane
->wm
.scaled
;
2627 /* Compute new watermarks for the pipe */
2628 static bool intel_compute_pipe_wm(struct drm_crtc
*crtc
,
2629 const struct hsw_pipe_wm_parameters
*params
,
2630 struct intel_pipe_wm
*pipe_wm
)
2632 struct drm_device
*dev
= crtc
->dev
;
2633 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
2634 int level
, max_level
= ilk_wm_max_level(dev
);
2635 /* LP0 watermark maximums depend on this pipe alone */
2636 struct intel_wm_config config
= {
2637 .num_pipes_active
= 1,
2638 .sprites_enabled
= params
->spr
.enabled
,
2639 .sprites_scaled
= params
->spr
.scaled
,
2641 struct hsw_wm_maximums max
;
2643 /* LP0 watermarks always use 1/2 DDB partitioning */
2644 ilk_compute_wm_maximums(dev
, 0, &config
, INTEL_DDB_PART_1_2
, &max
);
2646 /* ILK/SNB: LP2+ watermarks only w/o sprites */
2647 if (INTEL_INFO(dev
)->gen
<= 6 && params
->spr
.enabled
)
2650 /* ILK/SNB/IVB: LP1+ watermarks only w/o scaling */
2651 if (params
->spr
.scaled
)
2654 for (level
= 0; level
<= max_level
; level
++)
2655 ilk_compute_wm_level(dev_priv
, level
, params
,
2656 &pipe_wm
->wm
[level
]);
2658 pipe_wm
->linetime
= hsw_compute_linetime_wm(dev
, crtc
);
2660 /* At least LP0 must be valid */
2661 return ilk_validate_wm_level(0, &max
, &pipe_wm
->wm
[0]);
2665 * Merge the watermarks from all active pipes for a specific level.
2667 static void ilk_merge_wm_level(struct drm_device
*dev
,
2669 struct intel_wm_level
*ret_wm
)
2671 const struct intel_crtc
*intel_crtc
;
2673 list_for_each_entry(intel_crtc
, &dev
->mode_config
.crtc_list
, base
.head
) {
2674 const struct intel_wm_level
*wm
=
2675 &intel_crtc
->wm
.active
.wm
[level
];
2680 ret_wm
->pri_val
= max(ret_wm
->pri_val
, wm
->pri_val
);
2681 ret_wm
->spr_val
= max(ret_wm
->spr_val
, wm
->spr_val
);
2682 ret_wm
->cur_val
= max(ret_wm
->cur_val
, wm
->cur_val
);
2683 ret_wm
->fbc_val
= max(ret_wm
->fbc_val
, wm
->fbc_val
);
2686 ret_wm
->enable
= true;
2690 * Merge all low power watermarks for all active pipes.
2692 static void ilk_wm_merge(struct drm_device
*dev
,
2693 const struct hsw_wm_maximums
*max
,
2694 struct intel_pipe_wm
*merged
)
2696 int level
, max_level
= ilk_wm_max_level(dev
);
2698 merged
->fbc_wm_enabled
= true;
2700 /* merge each WM1+ level */
2701 for (level
= 1; level
<= max_level
; level
++) {
2702 struct intel_wm_level
*wm
= &merged
->wm
[level
];
2704 ilk_merge_wm_level(dev
, level
, wm
);
2706 if (!ilk_validate_wm_level(level
, max
, wm
))
2710 * The spec says it is preferred to disable
2711 * FBC WMs instead of disabling a WM level.
2713 if (wm
->fbc_val
> max
->fbc
) {
2714 merged
->fbc_wm_enabled
= false;
2720 static int ilk_wm_lp_to_level(int wm_lp
, const struct intel_pipe_wm
*pipe_wm
)
2722 /* LP1,LP2,LP3 levels are either 1,2,3 or 1,3,4 */
2723 return wm_lp
+ (wm_lp
>= 2 && pipe_wm
->wm
[4].enable
);
2726 /* The value we need to program into the WM_LPx latency field */
2727 static unsigned int ilk_wm_lp_latency(struct drm_device
*dev
, int level
)
2729 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
2731 if (IS_HASWELL(dev
))
2734 return dev_priv
->wm
.pri_latency
[level
];
2737 static void hsw_compute_wm_results(struct drm_device
*dev
,
2738 const struct intel_pipe_wm
*merged
,
2739 enum intel_ddb_partitioning partitioning
,
2740 struct hsw_wm_values
*results
)
2742 struct intel_crtc
*intel_crtc
;
2745 results
->enable_fbc_wm
= merged
->fbc_wm_enabled
;
2746 results
->partitioning
= partitioning
;
2748 /* LP1+ register values */
2749 for (wm_lp
= 1; wm_lp
<= 3; wm_lp
++) {
2750 const struct intel_wm_level
*r
;
2752 level
= ilk_wm_lp_to_level(wm_lp
, merged
);
2754 r
= &merged
->wm
[level
];
2758 results
->wm_lp
[wm_lp
- 1] = WM3_LP_EN
|
2759 (ilk_wm_lp_latency(dev
, level
) << WM1_LP_LATENCY_SHIFT
) |
2760 (r
->pri_val
<< WM1_LP_SR_SHIFT
) |
2763 if (INTEL_INFO(dev
)->gen
>= 8)
2764 results
->wm_lp
[wm_lp
- 1] |=
2765 r
->fbc_val
<< WM1_LP_FBC_SHIFT_BDW
;
2767 results
->wm_lp
[wm_lp
- 1] |=
2768 r
->fbc_val
<< WM1_LP_FBC_SHIFT
;
2770 if (INTEL_INFO(dev
)->gen
<= 6 && r
->spr_val
) {
2771 WARN_ON(wm_lp
!= 1);
2772 results
->wm_lp_spr
[wm_lp
- 1] = WM1S_LP_EN
| r
->spr_val
;
2774 results
->wm_lp_spr
[wm_lp
- 1] = r
->spr_val
;
2777 /* LP0 register values */
2778 list_for_each_entry(intel_crtc
, &dev
->mode_config
.crtc_list
, base
.head
) {
2779 enum pipe pipe
= intel_crtc
->pipe
;
2780 const struct intel_wm_level
*r
=
2781 &intel_crtc
->wm
.active
.wm
[0];
2783 if (WARN_ON(!r
->enable
))
2786 results
->wm_linetime
[pipe
] = intel_crtc
->wm
.active
.linetime
;
2788 results
->wm_pipe
[pipe
] =
2789 (r
->pri_val
<< WM0_PIPE_PLANE_SHIFT
) |
2790 (r
->spr_val
<< WM0_PIPE_SPRITE_SHIFT
) |
2795 /* Find the result with the highest level enabled. Check for enable_fbc_wm in
2796 * case both are at the same level. Prefer r1 in case they're the same. */
2797 static struct intel_pipe_wm
*hsw_find_best_result(struct drm_device
*dev
,
2798 struct intel_pipe_wm
*r1
,
2799 struct intel_pipe_wm
*r2
)
2801 int level
, max_level
= ilk_wm_max_level(dev
);
2802 int level1
= 0, level2
= 0;
2804 for (level
= 1; level
<= max_level
; level
++) {
2805 if (r1
->wm
[level
].enable
)
2807 if (r2
->wm
[level
].enable
)
2811 if (level1
== level2
) {
2812 if (r2
->fbc_wm_enabled
&& !r1
->fbc_wm_enabled
)
2816 } else if (level1
> level2
) {
2823 /* dirty bits used to track which watermarks need changes */
2824 #define WM_DIRTY_PIPE(pipe) (1 << (pipe))
2825 #define WM_DIRTY_LINETIME(pipe) (1 << (8 + (pipe)))
2826 #define WM_DIRTY_LP(wm_lp) (1 << (15 + (wm_lp)))
2827 #define WM_DIRTY_LP_ALL (WM_DIRTY_LP(1) | WM_DIRTY_LP(2) | WM_DIRTY_LP(3))
2828 #define WM_DIRTY_FBC (1 << 24)
2829 #define WM_DIRTY_DDB (1 << 25)
2831 static unsigned int ilk_compute_wm_dirty(struct drm_device
*dev
,
2832 const struct hsw_wm_values
*old
,
2833 const struct hsw_wm_values
*new)
2835 unsigned int dirty
= 0;
2839 for_each_pipe(pipe
) {
2840 if (old
->wm_linetime
[pipe
] != new->wm_linetime
[pipe
]) {
2841 dirty
|= WM_DIRTY_LINETIME(pipe
);
2842 /* Must disable LP1+ watermarks too */
2843 dirty
|= WM_DIRTY_LP_ALL
;
2846 if (old
->wm_pipe
[pipe
] != new->wm_pipe
[pipe
]) {
2847 dirty
|= WM_DIRTY_PIPE(pipe
);
2848 /* Must disable LP1+ watermarks too */
2849 dirty
|= WM_DIRTY_LP_ALL
;
2853 if (old
->enable_fbc_wm
!= new->enable_fbc_wm
) {
2854 dirty
|= WM_DIRTY_FBC
;
2855 /* Must disable LP1+ watermarks too */
2856 dirty
|= WM_DIRTY_LP_ALL
;
2859 if (old
->partitioning
!= new->partitioning
) {
2860 dirty
|= WM_DIRTY_DDB
;
2861 /* Must disable LP1+ watermarks too */
2862 dirty
|= WM_DIRTY_LP_ALL
;
2865 /* LP1+ watermarks already deemed dirty, no need to continue */
2866 if (dirty
& WM_DIRTY_LP_ALL
)
2869 /* Find the lowest numbered LP1+ watermark in need of an update... */
2870 for (wm_lp
= 1; wm_lp
<= 3; wm_lp
++) {
2871 if (old
->wm_lp
[wm_lp
- 1] != new->wm_lp
[wm_lp
- 1] ||
2872 old
->wm_lp_spr
[wm_lp
- 1] != new->wm_lp_spr
[wm_lp
- 1])
2876 /* ...and mark it and all higher numbered LP1+ watermarks as dirty */
2877 for (; wm_lp
<= 3; wm_lp
++)
2878 dirty
|= WM_DIRTY_LP(wm_lp
);
2884 * The spec says we shouldn't write when we don't need, because every write
2885 * causes WMs to be re-evaluated, expending some power.
2887 static void hsw_write_wm_values(struct drm_i915_private
*dev_priv
,
2888 struct hsw_wm_values
*results
)
2890 struct drm_device
*dev
= dev_priv
->dev
;
2891 struct hsw_wm_values
*previous
= &dev_priv
->wm
.hw
;
2895 dirty
= ilk_compute_wm_dirty(dev_priv
->dev
, previous
, results
);
2899 if (dirty
& WM_DIRTY_LP(3) && previous
->wm_lp
[2] != 0)
2900 I915_WRITE(WM3_LP_ILK
, 0);
2901 if (dirty
& WM_DIRTY_LP(2) && previous
->wm_lp
[1] != 0)
2902 I915_WRITE(WM2_LP_ILK
, 0);
2903 if (dirty
& WM_DIRTY_LP(1) && previous
->wm_lp
[0] != 0)
2904 I915_WRITE(WM1_LP_ILK
, 0);
2906 if (INTEL_INFO(dev
)->gen
<= 6 &&
2907 dirty
& WM_DIRTY_LP(1) && previous
->wm_lp_spr
[0] != 0)
2908 I915_WRITE(WM1S_LP_ILK
, 0);
2910 if (dirty
& WM_DIRTY_PIPE(PIPE_A
))
2911 I915_WRITE(WM0_PIPEA_ILK
, results
->wm_pipe
[0]);
2912 if (dirty
& WM_DIRTY_PIPE(PIPE_B
))
2913 I915_WRITE(WM0_PIPEB_ILK
, results
->wm_pipe
[1]);
2914 if (dirty
& WM_DIRTY_PIPE(PIPE_C
))
2915 I915_WRITE(WM0_PIPEC_IVB
, results
->wm_pipe
[2]);
2917 if (dirty
& WM_DIRTY_LINETIME(PIPE_A
))
2918 I915_WRITE(PIPE_WM_LINETIME(PIPE_A
), results
->wm_linetime
[0]);
2919 if (dirty
& WM_DIRTY_LINETIME(PIPE_B
))
2920 I915_WRITE(PIPE_WM_LINETIME(PIPE_B
), results
->wm_linetime
[1]);
2921 if (dirty
& WM_DIRTY_LINETIME(PIPE_C
))
2922 I915_WRITE(PIPE_WM_LINETIME(PIPE_C
), results
->wm_linetime
[2]);
2924 if (dirty
& WM_DIRTY_DDB
) {
2925 if (IS_HASWELL(dev
)) {
2926 val
= I915_READ(WM_MISC
);
2927 if (results
->partitioning
== INTEL_DDB_PART_1_2
)
2928 val
&= ~WM_MISC_DATA_PARTITION_5_6
;
2930 val
|= WM_MISC_DATA_PARTITION_5_6
;
2931 I915_WRITE(WM_MISC
, val
);
2933 val
= I915_READ(DISP_ARB_CTL2
);
2934 if (results
->partitioning
== INTEL_DDB_PART_1_2
)
2935 val
&= ~DISP_DATA_PARTITION_5_6
;
2937 val
|= DISP_DATA_PARTITION_5_6
;
2938 I915_WRITE(DISP_ARB_CTL2
, val
);
2942 if (dirty
& WM_DIRTY_FBC
) {
2943 val
= I915_READ(DISP_ARB_CTL
);
2944 if (results
->enable_fbc_wm
)
2945 val
&= ~DISP_FBC_WM_DIS
;
2947 val
|= DISP_FBC_WM_DIS
;
2948 I915_WRITE(DISP_ARB_CTL
, val
);
2951 if (INTEL_INFO(dev
)->gen
<= 6) {
2952 if (dirty
& WM_DIRTY_LP(1) && results
->wm_lp_spr
[0] != 0)
2953 I915_WRITE(WM1S_LP_ILK
, results
->wm_lp_spr
[0]);
2955 if (dirty
& WM_DIRTY_LP(1) && previous
->wm_lp_spr
[0] != results
->wm_lp_spr
[0])
2956 I915_WRITE(WM1S_LP_ILK
, results
->wm_lp_spr
[0]);
2957 if (dirty
& WM_DIRTY_LP(2) && previous
->wm_lp_spr
[1] != results
->wm_lp_spr
[1])
2958 I915_WRITE(WM2S_LP_IVB
, results
->wm_lp_spr
[1]);
2959 if (dirty
& WM_DIRTY_LP(3) && previous
->wm_lp_spr
[2] != results
->wm_lp_spr
[2])
2960 I915_WRITE(WM3S_LP_IVB
, results
->wm_lp_spr
[2]);
2963 if (dirty
& WM_DIRTY_LP(1) && results
->wm_lp
[0] != 0)
2964 I915_WRITE(WM1_LP_ILK
, results
->wm_lp
[0]);
2965 if (dirty
& WM_DIRTY_LP(2) && results
->wm_lp
[1] != 0)
2966 I915_WRITE(WM2_LP_ILK
, results
->wm_lp
[1]);
2967 if (dirty
& WM_DIRTY_LP(3) && results
->wm_lp
[2] != 0)
2968 I915_WRITE(WM3_LP_ILK
, results
->wm_lp
[2]);
2970 dev_priv
->wm
.hw
= *results
;
2973 static void haswell_update_wm(struct drm_crtc
*crtc
)
2975 struct intel_crtc
*intel_crtc
= to_intel_crtc(crtc
);
2976 struct drm_device
*dev
= crtc
->dev
;
2977 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
2978 struct hsw_wm_maximums max
;
2979 struct hsw_pipe_wm_parameters params
= {};
2980 struct hsw_wm_values results
= {};
2981 enum intel_ddb_partitioning partitioning
;
2982 struct intel_pipe_wm pipe_wm
= {};
2983 struct intel_pipe_wm lp_wm_1_2
= {}, lp_wm_5_6
= {}, *best_lp_wm
;
2984 struct intel_wm_config config
= {};
2986 hsw_compute_wm_parameters(crtc
, ¶ms
, &config
);
2988 intel_compute_pipe_wm(crtc
, ¶ms
, &pipe_wm
);
2990 if (!memcmp(&intel_crtc
->wm
.active
, &pipe_wm
, sizeof(pipe_wm
)))
2993 intel_crtc
->wm
.active
= pipe_wm
;
2995 ilk_compute_wm_maximums(dev
, 1, &config
, INTEL_DDB_PART_1_2
, &max
);
2996 ilk_wm_merge(dev
, &max
, &lp_wm_1_2
);
2998 /* 5/6 split only in single pipe config on IVB+ */
2999 if (INTEL_INFO(dev
)->gen
>= 7 &&
3000 config
.num_pipes_active
== 1 && config
.sprites_enabled
) {
3001 ilk_compute_wm_maximums(dev
, 1, &config
, INTEL_DDB_PART_5_6
, &max
);
3002 ilk_wm_merge(dev
, &max
, &lp_wm_5_6
);
3004 best_lp_wm
= hsw_find_best_result(dev
, &lp_wm_1_2
, &lp_wm_5_6
);
3006 best_lp_wm
= &lp_wm_1_2
;
3009 partitioning
= (best_lp_wm
== &lp_wm_1_2
) ?
3010 INTEL_DDB_PART_1_2
: INTEL_DDB_PART_5_6
;
3012 hsw_compute_wm_results(dev
, best_lp_wm
, partitioning
, &results
);
3014 hsw_write_wm_values(dev_priv
, &results
);
3017 static void haswell_update_sprite_wm(struct drm_plane
*plane
,
3018 struct drm_crtc
*crtc
,
3019 uint32_t sprite_width
, int pixel_size
,
3020 bool enabled
, bool scaled
)
3022 struct intel_plane
*intel_plane
= to_intel_plane(plane
);
3024 intel_plane
->wm
.enabled
= enabled
;
3025 intel_plane
->wm
.scaled
= scaled
;
3026 intel_plane
->wm
.horiz_pixels
= sprite_width
;
3027 intel_plane
->wm
.bytes_per_pixel
= pixel_size
;
3029 haswell_update_wm(crtc
);
3033 sandybridge_compute_sprite_wm(struct drm_device
*dev
, int plane
,
3034 uint32_t sprite_width
, int pixel_size
,
3035 const struct intel_watermark_params
*display
,
3036 int display_latency_ns
, int *sprite_wm
)
3038 struct drm_crtc
*crtc
;
3040 int entries
, tlb_miss
;
3042 crtc
= intel_get_crtc_for_plane(dev
, plane
);
3043 if (!intel_crtc_active(crtc
)) {
3044 *sprite_wm
= display
->guard_size
;
3048 clock
= to_intel_crtc(crtc
)->config
.adjusted_mode
.crtc_clock
;
3050 /* Use the small buffer method to calculate the sprite watermark */
3051 entries
= ((clock
* pixel_size
/ 1000) * display_latency_ns
) / 1000;
3052 tlb_miss
= display
->fifo_size
*display
->cacheline_size
-
3055 entries
+= tlb_miss
;
3056 entries
= DIV_ROUND_UP(entries
, display
->cacheline_size
);
3057 *sprite_wm
= entries
+ display
->guard_size
;
3058 if (*sprite_wm
> (int)display
->max_wm
)
3059 *sprite_wm
= display
->max_wm
;
3065 sandybridge_compute_sprite_srwm(struct drm_device
*dev
, int plane
,
3066 uint32_t sprite_width
, int pixel_size
,
3067 const struct intel_watermark_params
*display
,
3068 int latency_ns
, int *sprite_wm
)
3070 struct drm_crtc
*crtc
;
3071 unsigned long line_time_us
;
3073 int line_count
, line_size
;
3082 crtc
= intel_get_crtc_for_plane(dev
, plane
);
3083 clock
= to_intel_crtc(crtc
)->config
.adjusted_mode
.crtc_clock
;
3089 line_time_us
= (sprite_width
* 1000) / clock
;
3090 if (!line_time_us
) {
3095 line_count
= (latency_ns
/ line_time_us
+ 1000) / 1000;
3096 line_size
= sprite_width
* pixel_size
;
3098 /* Use the minimum of the small and large buffer method for primary */
3099 small
= ((clock
* pixel_size
/ 1000) * latency_ns
) / 1000;
3100 large
= line_count
* line_size
;
3102 entries
= DIV_ROUND_UP(min(small
, large
), display
->cacheline_size
);
3103 *sprite_wm
= entries
+ display
->guard_size
;
3105 return *sprite_wm
> 0x3ff ? false : true;
3108 static void sandybridge_update_sprite_wm(struct drm_plane
*plane
,
3109 struct drm_crtc
*crtc
,
3110 uint32_t sprite_width
, int pixel_size
,
3111 bool enabled
, bool scaled
)
3113 struct drm_device
*dev
= plane
->dev
;
3114 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
3115 int pipe
= to_intel_plane(plane
)->pipe
;
3116 int latency
= dev_priv
->wm
.spr_latency
[0] * 100; /* In unit 0.1us */
3126 reg
= WM0_PIPEA_ILK
;
3129 reg
= WM0_PIPEB_ILK
;
3132 reg
= WM0_PIPEC_IVB
;
3135 return; /* bad pipe */
3138 ret
= sandybridge_compute_sprite_wm(dev
, pipe
, sprite_width
, pixel_size
,
3139 &sandybridge_display_wm_info
,
3140 latency
, &sprite_wm
);
3142 DRM_DEBUG_KMS("failed to compute sprite wm for pipe %c\n",
3147 val
= I915_READ(reg
);
3148 val
&= ~WM0_PIPE_SPRITE_MASK
;
3149 I915_WRITE(reg
, val
| (sprite_wm
<< WM0_PIPE_SPRITE_SHIFT
));
3150 DRM_DEBUG_KMS("sprite watermarks For pipe %c - %d\n", pipe_name(pipe
), sprite_wm
);
3153 ret
= sandybridge_compute_sprite_srwm(dev
, pipe
, sprite_width
,
3155 &sandybridge_display_srwm_info
,
3156 dev_priv
->wm
.spr_latency
[1] * 500,
3159 DRM_DEBUG_KMS("failed to compute sprite lp1 wm on pipe %c\n",
3163 I915_WRITE(WM1S_LP_ILK
, sprite_wm
);
3165 /* Only IVB has two more LP watermarks for sprite */
3166 if (!IS_IVYBRIDGE(dev
))
3169 ret
= sandybridge_compute_sprite_srwm(dev
, pipe
, sprite_width
,
3171 &sandybridge_display_srwm_info
,
3172 dev_priv
->wm
.spr_latency
[2] * 500,
3175 DRM_DEBUG_KMS("failed to compute sprite lp2 wm on pipe %c\n",
3179 I915_WRITE(WM2S_LP_IVB
, sprite_wm
);
3181 ret
= sandybridge_compute_sprite_srwm(dev
, pipe
, sprite_width
,
3183 &sandybridge_display_srwm_info
,
3184 dev_priv
->wm
.spr_latency
[3] * 500,
3187 DRM_DEBUG_KMS("failed to compute sprite lp3 wm on pipe %c\n",
3191 I915_WRITE(WM3S_LP_IVB
, sprite_wm
);
3194 static void ilk_pipe_wm_get_hw_state(struct drm_crtc
*crtc
)
3196 struct drm_device
*dev
= crtc
->dev
;
3197 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
3198 struct hsw_wm_values
*hw
= &dev_priv
->wm
.hw
;
3199 struct intel_crtc
*intel_crtc
= to_intel_crtc(crtc
);
3200 struct intel_pipe_wm
*active
= &intel_crtc
->wm
.active
;
3201 enum pipe pipe
= intel_crtc
->pipe
;
3202 static const unsigned int wm0_pipe_reg
[] = {
3203 [PIPE_A
] = WM0_PIPEA_ILK
,
3204 [PIPE_B
] = WM0_PIPEB_ILK
,
3205 [PIPE_C
] = WM0_PIPEC_IVB
,
3208 hw
->wm_pipe
[pipe
] = I915_READ(wm0_pipe_reg
[pipe
]);
3209 hw
->wm_linetime
[pipe
] = I915_READ(PIPE_WM_LINETIME(pipe
));
3211 if (intel_crtc_active(crtc
)) {
3212 u32 tmp
= hw
->wm_pipe
[pipe
];
3215 * For active pipes LP0 watermark is marked as
3216 * enabled, and LP1+ watermaks as disabled since
3217 * we can't really reverse compute them in case
3218 * multiple pipes are active.
3220 active
->wm
[0].enable
= true;
3221 active
->wm
[0].pri_val
= (tmp
& WM0_PIPE_PLANE_MASK
) >> WM0_PIPE_PLANE_SHIFT
;
3222 active
->wm
[0].spr_val
= (tmp
& WM0_PIPE_SPRITE_MASK
) >> WM0_PIPE_SPRITE_SHIFT
;
3223 active
->wm
[0].cur_val
= tmp
& WM0_PIPE_CURSOR_MASK
;
3224 active
->linetime
= hw
->wm_linetime
[pipe
];
3226 int level
, max_level
= ilk_wm_max_level(dev
);
3229 * For inactive pipes, all watermark levels
3230 * should be marked as enabled but zeroed,
3231 * which is what we'd compute them to.
3233 for (level
= 0; level
<= max_level
; level
++)
3234 active
->wm
[level
].enable
= true;
3238 void ilk_wm_get_hw_state(struct drm_device
*dev
)
3240 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
3241 struct hsw_wm_values
*hw
= &dev_priv
->wm
.hw
;
3242 struct drm_crtc
*crtc
;
3244 list_for_each_entry(crtc
, &dev
->mode_config
.crtc_list
, head
)
3245 ilk_pipe_wm_get_hw_state(crtc
);
3247 hw
->wm_lp
[0] = I915_READ(WM1_LP_ILK
);
3248 hw
->wm_lp
[1] = I915_READ(WM2_LP_ILK
);
3249 hw
->wm_lp
[2] = I915_READ(WM3_LP_ILK
);
3251 hw
->wm_lp_spr
[0] = I915_READ(WM1S_LP_ILK
);
3252 hw
->wm_lp_spr
[1] = I915_READ(WM2S_LP_IVB
);
3253 hw
->wm_lp_spr
[2] = I915_READ(WM3S_LP_IVB
);
3255 if (IS_HASWELL(dev
))
3256 hw
->partitioning
= (I915_READ(WM_MISC
) & WM_MISC_DATA_PARTITION_5_6
) ?
3257 INTEL_DDB_PART_5_6
: INTEL_DDB_PART_1_2
;
3258 else if (IS_IVYBRIDGE(dev
))
3259 hw
->partitioning
= (I915_READ(DISP_ARB_CTL2
) & DISP_DATA_PARTITION_5_6
) ?
3260 INTEL_DDB_PART_5_6
: INTEL_DDB_PART_1_2
;
3263 !(I915_READ(DISP_ARB_CTL
) & DISP_FBC_WM_DIS
);
3267 * intel_update_watermarks - update FIFO watermark values based on current modes
3269 * Calculate watermark values for the various WM regs based on current mode
3270 * and plane configuration.
3272 * There are several cases to deal with here:
3273 * - normal (i.e. non-self-refresh)
3274 * - self-refresh (SR) mode
3275 * - lines are large relative to FIFO size (buffer can hold up to 2)
3276 * - lines are small relative to FIFO size (buffer can hold more than 2
3277 * lines), so need to account for TLB latency
3279 * The normal calculation is:
3280 * watermark = dotclock * bytes per pixel * latency
3281 * where latency is platform & configuration dependent (we assume pessimal
3284 * The SR calculation is:
3285 * watermark = (trunc(latency/line time)+1) * surface width *
3288 * line time = htotal / dotclock
3289 * surface width = hdisplay for normal plane and 64 for cursor
3290 * and latency is assumed to be high, as above.
3292 * The final value programmed to the register should always be rounded up,
3293 * and include an extra 2 entries to account for clock crossings.
3295 * We don't use the sprite, so we can ignore that. And on Crestline we have
3296 * to set the non-SR watermarks to 8.
3298 void intel_update_watermarks(struct drm_crtc
*crtc
)
3300 struct drm_i915_private
*dev_priv
= crtc
->dev
->dev_private
;
3302 if (dev_priv
->display
.update_wm
)
3303 dev_priv
->display
.update_wm(crtc
);
3306 void intel_update_sprite_watermarks(struct drm_plane
*plane
,
3307 struct drm_crtc
*crtc
,
3308 uint32_t sprite_width
, int pixel_size
,
3309 bool enabled
, bool scaled
)
3311 struct drm_i915_private
*dev_priv
= plane
->dev
->dev_private
;
3313 if (dev_priv
->display
.update_sprite_wm
)
3314 dev_priv
->display
.update_sprite_wm(plane
, crtc
, sprite_width
,
3315 pixel_size
, enabled
, scaled
);
3318 static struct drm_i915_gem_object
*
3319 intel_alloc_context_page(struct drm_device
*dev
)
3321 struct drm_i915_gem_object
*ctx
;
3324 WARN_ON(!mutex_is_locked(&dev
->struct_mutex
));
3326 ctx
= i915_gem_alloc_object(dev
, 4096);
3328 DRM_DEBUG("failed to alloc power context, RC6 disabled\n");
3332 ret
= i915_gem_obj_ggtt_pin(ctx
, 4096, true, false);
3334 DRM_ERROR("failed to pin power context: %d\n", ret
);
3338 ret
= i915_gem_object_set_to_gtt_domain(ctx
, 1);
3340 DRM_ERROR("failed to set-domain on power context: %d\n", ret
);
3347 i915_gem_object_unpin(ctx
);
3349 drm_gem_object_unreference(&ctx
->base
);
3354 * Lock protecting IPS related data structures
3356 DEFINE_SPINLOCK(mchdev_lock
);
3358 /* Global for IPS driver to get at the current i915 device. Protected by
3360 static struct drm_i915_private
*i915_mch_dev
;
3362 bool ironlake_set_drps(struct drm_device
*dev
, u8 val
)
3364 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
3367 assert_spin_locked(&mchdev_lock
);
3369 rgvswctl
= I915_READ16(MEMSWCTL
);
3370 if (rgvswctl
& MEMCTL_CMD_STS
) {
3371 DRM_DEBUG("gpu busy, RCS change rejected\n");
3372 return false; /* still busy with another command */
3375 rgvswctl
= (MEMCTL_CMD_CHFREQ
<< MEMCTL_CMD_SHIFT
) |
3376 (val
<< MEMCTL_FREQ_SHIFT
) | MEMCTL_SFCAVM
;
3377 I915_WRITE16(MEMSWCTL
, rgvswctl
);
3378 POSTING_READ16(MEMSWCTL
);
3380 rgvswctl
|= MEMCTL_CMD_STS
;
3381 I915_WRITE16(MEMSWCTL
, rgvswctl
);
3386 static void ironlake_enable_drps(struct drm_device
*dev
)
3388 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
3389 u32 rgvmodectl
= I915_READ(MEMMODECTL
);
3390 u8 fmax
, fmin
, fstart
, vstart
;
3392 spin_lock_irq(&mchdev_lock
);
3394 /* Enable temp reporting */
3395 I915_WRITE16(PMMISC
, I915_READ(PMMISC
) | MCPPCE_EN
);
3396 I915_WRITE16(TSC1
, I915_READ(TSC1
) | TSE
);
3398 /* 100ms RC evaluation intervals */
3399 I915_WRITE(RCUPEI
, 100000);
3400 I915_WRITE(RCDNEI
, 100000);
3402 /* Set max/min thresholds to 90ms and 80ms respectively */
3403 I915_WRITE(RCBMAXAVG
, 90000);
3404 I915_WRITE(RCBMINAVG
, 80000);
3406 I915_WRITE(MEMIHYST
, 1);
3408 /* Set up min, max, and cur for interrupt handling */
3409 fmax
= (rgvmodectl
& MEMMODE_FMAX_MASK
) >> MEMMODE_FMAX_SHIFT
;
3410 fmin
= (rgvmodectl
& MEMMODE_FMIN_MASK
);
3411 fstart
= (rgvmodectl
& MEMMODE_FSTART_MASK
) >>
3412 MEMMODE_FSTART_SHIFT
;
3414 vstart
= (I915_READ(PXVFREQ_BASE
+ (fstart
* 4)) & PXVFREQ_PX_MASK
) >>
3417 dev_priv
->ips
.fmax
= fmax
; /* IPS callback will increase this */
3418 dev_priv
->ips
.fstart
= fstart
;
3420 dev_priv
->ips
.max_delay
= fstart
;
3421 dev_priv
->ips
.min_delay
= fmin
;
3422 dev_priv
->ips
.cur_delay
= fstart
;
3424 DRM_DEBUG_DRIVER("fmax: %d, fmin: %d, fstart: %d\n",
3425 fmax
, fmin
, fstart
);
3427 I915_WRITE(MEMINTREN
, MEMINT_CX_SUPR_EN
| MEMINT_EVAL_CHG_EN
);
3430 * Interrupts will be enabled in ironlake_irq_postinstall
3433 I915_WRITE(VIDSTART
, vstart
);
3434 POSTING_READ(VIDSTART
);
3436 rgvmodectl
|= MEMMODE_SWMODE_EN
;
3437 I915_WRITE(MEMMODECTL
, rgvmodectl
);
3439 if (wait_for_atomic((I915_READ(MEMSWCTL
) & MEMCTL_CMD_STS
) == 0, 10))
3440 DRM_ERROR("stuck trying to change perf mode\n");
3443 ironlake_set_drps(dev
, fstart
);
3445 dev_priv
->ips
.last_count1
= I915_READ(0x112e4) + I915_READ(0x112e8) +
3447 dev_priv
->ips
.last_time1
= jiffies_to_msecs(jiffies
);
3448 dev_priv
->ips
.last_count2
= I915_READ(0x112f4);
3449 getrawmonotonic(&dev_priv
->ips
.last_time2
);
3451 spin_unlock_irq(&mchdev_lock
);
3454 static void ironlake_disable_drps(struct drm_device
*dev
)
3456 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
3459 spin_lock_irq(&mchdev_lock
);
3461 rgvswctl
= I915_READ16(MEMSWCTL
);
3463 /* Ack interrupts, disable EFC interrupt */
3464 I915_WRITE(MEMINTREN
, I915_READ(MEMINTREN
) & ~MEMINT_EVAL_CHG_EN
);
3465 I915_WRITE(MEMINTRSTS
, MEMINT_EVAL_CHG
);
3466 I915_WRITE(DEIER
, I915_READ(DEIER
) & ~DE_PCU_EVENT
);
3467 I915_WRITE(DEIIR
, DE_PCU_EVENT
);
3468 I915_WRITE(DEIMR
, I915_READ(DEIMR
) | DE_PCU_EVENT
);
3470 /* Go back to the starting frequency */
3471 ironlake_set_drps(dev
, dev_priv
->ips
.fstart
);
3473 rgvswctl
|= MEMCTL_CMD_STS
;
3474 I915_WRITE(MEMSWCTL
, rgvswctl
);
3477 spin_unlock_irq(&mchdev_lock
);
3480 /* There's a funny hw issue where the hw returns all 0 when reading from
3481 * GEN6_RP_INTERRUPT_LIMITS. Hence we always need to compute the desired value
3482 * ourselves, instead of doing a rmw cycle (which might result in us clearing
3483 * all limits and the gpu stuck at whatever frequency it is at atm).
3485 static u32
gen6_rps_limits(struct drm_i915_private
*dev_priv
, u8 val
)
3489 /* Only set the down limit when we've reached the lowest level to avoid
3490 * getting more interrupts, otherwise leave this clear. This prevents a
3491 * race in the hw when coming out of rc6: There's a tiny window where
3492 * the hw runs at the minimal clock before selecting the desired
3493 * frequency, if the down threshold expires in that window we will not
3494 * receive a down interrupt. */
3495 limits
= dev_priv
->rps
.max_delay
<< 24;
3496 if (val
<= dev_priv
->rps
.min_delay
)
3497 limits
|= dev_priv
->rps
.min_delay
<< 16;
3502 static void gen6_set_rps_thresholds(struct drm_i915_private
*dev_priv
, u8 val
)
3506 new_power
= dev_priv
->rps
.power
;
3507 switch (dev_priv
->rps
.power
) {
3509 if (val
> dev_priv
->rps
.rpe_delay
+ 1 && val
> dev_priv
->rps
.cur_delay
)
3510 new_power
= BETWEEN
;
3514 if (val
<= dev_priv
->rps
.rpe_delay
&& val
< dev_priv
->rps
.cur_delay
)
3515 new_power
= LOW_POWER
;
3516 else if (val
>= dev_priv
->rps
.rp0_delay
&& val
> dev_priv
->rps
.cur_delay
)
3517 new_power
= HIGH_POWER
;
3521 if (val
< (dev_priv
->rps
.rp1_delay
+ dev_priv
->rps
.rp0_delay
) >> 1 && val
< dev_priv
->rps
.cur_delay
)
3522 new_power
= BETWEEN
;
3525 /* Max/min bins are special */
3526 if (val
== dev_priv
->rps
.min_delay
)
3527 new_power
= LOW_POWER
;
3528 if (val
== dev_priv
->rps
.max_delay
)
3529 new_power
= HIGH_POWER
;
3530 if (new_power
== dev_priv
->rps
.power
)
3533 /* Note the units here are not exactly 1us, but 1280ns. */
3534 switch (new_power
) {
3536 /* Upclock if more than 95% busy over 16ms */
3537 I915_WRITE(GEN6_RP_UP_EI
, 12500);
3538 I915_WRITE(GEN6_RP_UP_THRESHOLD
, 11800);
3540 /* Downclock if less than 85% busy over 32ms */
3541 I915_WRITE(GEN6_RP_DOWN_EI
, 25000);
3542 I915_WRITE(GEN6_RP_DOWN_THRESHOLD
, 21250);
3544 I915_WRITE(GEN6_RP_CONTROL
,
3545 GEN6_RP_MEDIA_TURBO
|
3546 GEN6_RP_MEDIA_HW_NORMAL_MODE
|
3547 GEN6_RP_MEDIA_IS_GFX
|
3549 GEN6_RP_UP_BUSY_AVG
|
3550 GEN6_RP_DOWN_IDLE_AVG
);
3554 /* Upclock if more than 90% busy over 13ms */
3555 I915_WRITE(GEN6_RP_UP_EI
, 10250);
3556 I915_WRITE(GEN6_RP_UP_THRESHOLD
, 9225);
3558 /* Downclock if less than 75% busy over 32ms */
3559 I915_WRITE(GEN6_RP_DOWN_EI
, 25000);
3560 I915_WRITE(GEN6_RP_DOWN_THRESHOLD
, 18750);
3562 I915_WRITE(GEN6_RP_CONTROL
,
3563 GEN6_RP_MEDIA_TURBO
|
3564 GEN6_RP_MEDIA_HW_NORMAL_MODE
|
3565 GEN6_RP_MEDIA_IS_GFX
|
3567 GEN6_RP_UP_BUSY_AVG
|
3568 GEN6_RP_DOWN_IDLE_AVG
);
3572 /* Upclock if more than 85% busy over 10ms */
3573 I915_WRITE(GEN6_RP_UP_EI
, 8000);
3574 I915_WRITE(GEN6_RP_UP_THRESHOLD
, 6800);
3576 /* Downclock if less than 60% busy over 32ms */
3577 I915_WRITE(GEN6_RP_DOWN_EI
, 25000);
3578 I915_WRITE(GEN6_RP_DOWN_THRESHOLD
, 15000);
3580 I915_WRITE(GEN6_RP_CONTROL
,
3581 GEN6_RP_MEDIA_TURBO
|
3582 GEN6_RP_MEDIA_HW_NORMAL_MODE
|
3583 GEN6_RP_MEDIA_IS_GFX
|
3585 GEN6_RP_UP_BUSY_AVG
|
3586 GEN6_RP_DOWN_IDLE_AVG
);
3590 dev_priv
->rps
.power
= new_power
;
3591 dev_priv
->rps
.last_adj
= 0;
3594 void gen6_set_rps(struct drm_device
*dev
, u8 val
)
3596 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
3598 WARN_ON(!mutex_is_locked(&dev_priv
->rps
.hw_lock
));
3599 WARN_ON(val
> dev_priv
->rps
.max_delay
);
3600 WARN_ON(val
< dev_priv
->rps
.min_delay
);
3602 if (val
== dev_priv
->rps
.cur_delay
)
3605 gen6_set_rps_thresholds(dev_priv
, val
);
3607 if (IS_HASWELL(dev
))
3608 I915_WRITE(GEN6_RPNSWREQ
,
3609 HSW_FREQUENCY(val
));
3611 I915_WRITE(GEN6_RPNSWREQ
,
3612 GEN6_FREQUENCY(val
) |
3614 GEN6_AGGRESSIVE_TURBO
);
3616 /* Make sure we continue to get interrupts
3617 * until we hit the minimum or maximum frequencies.
3619 I915_WRITE(GEN6_RP_INTERRUPT_LIMITS
,
3620 gen6_rps_limits(dev_priv
, val
));
3622 POSTING_READ(GEN6_RPNSWREQ
);
3624 dev_priv
->rps
.cur_delay
= val
;
3626 trace_intel_gpu_freq_change(val
* 50);
3629 void gen6_rps_idle(struct drm_i915_private
*dev_priv
)
3631 struct drm_device
*dev
= dev_priv
->dev
;
3633 mutex_lock(&dev_priv
->rps
.hw_lock
);
3634 if (dev_priv
->rps
.enabled
) {
3635 if (IS_VALLEYVIEW(dev
))
3636 valleyview_set_rps(dev_priv
->dev
, dev_priv
->rps
.min_delay
);
3638 gen6_set_rps(dev_priv
->dev
, dev_priv
->rps
.min_delay
);
3639 dev_priv
->rps
.last_adj
= 0;
3641 mutex_unlock(&dev_priv
->rps
.hw_lock
);
3644 void gen6_rps_boost(struct drm_i915_private
*dev_priv
)
3646 struct drm_device
*dev
= dev_priv
->dev
;
3648 mutex_lock(&dev_priv
->rps
.hw_lock
);
3649 if (dev_priv
->rps
.enabled
) {
3650 if (IS_VALLEYVIEW(dev
))
3651 valleyview_set_rps(dev_priv
->dev
, dev_priv
->rps
.max_delay
);
3653 gen6_set_rps(dev_priv
->dev
, dev_priv
->rps
.max_delay
);
3654 dev_priv
->rps
.last_adj
= 0;
3656 mutex_unlock(&dev_priv
->rps
.hw_lock
);
3659 void valleyview_set_rps(struct drm_device
*dev
, u8 val
)
3661 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
3663 WARN_ON(!mutex_is_locked(&dev_priv
->rps
.hw_lock
));
3664 WARN_ON(val
> dev_priv
->rps
.max_delay
);
3665 WARN_ON(val
< dev_priv
->rps
.min_delay
);
3667 DRM_DEBUG_DRIVER("GPU freq request from %d MHz (%u) to %d MHz (%u)\n",
3668 vlv_gpu_freq(dev_priv
, dev_priv
->rps
.cur_delay
),
3669 dev_priv
->rps
.cur_delay
,
3670 vlv_gpu_freq(dev_priv
, val
), val
);
3672 if (val
== dev_priv
->rps
.cur_delay
)
3675 vlv_punit_write(dev_priv
, PUNIT_REG_GPU_FREQ_REQ
, val
);
3677 dev_priv
->rps
.cur_delay
= val
;
3679 trace_intel_gpu_freq_change(vlv_gpu_freq(dev_priv
, val
));
3682 static void gen6_disable_rps_interrupts(struct drm_device
*dev
)
3684 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
3686 I915_WRITE(GEN6_PMINTRMSK
, 0xffffffff);
3687 I915_WRITE(GEN6_PMIER
, I915_READ(GEN6_PMIER
) & ~GEN6_PM_RPS_EVENTS
);
3688 /* Complete PM interrupt masking here doesn't race with the rps work
3689 * item again unmasking PM interrupts because that is using a different
3690 * register (PMIMR) to mask PM interrupts. The only risk is in leaving
3691 * stale bits in PMIIR and PMIMR which gen6_enable_rps will clean up. */
3693 spin_lock_irq(&dev_priv
->irq_lock
);
3694 dev_priv
->rps
.pm_iir
= 0;
3695 spin_unlock_irq(&dev_priv
->irq_lock
);
3697 I915_WRITE(GEN6_PMIIR
, GEN6_PM_RPS_EVENTS
);
3700 static void gen6_disable_rps(struct drm_device
*dev
)
3702 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
3704 I915_WRITE(GEN6_RC_CONTROL
, 0);
3705 I915_WRITE(GEN6_RPNSWREQ
, 1 << 31);
3707 gen6_disable_rps_interrupts(dev
);
3710 static void valleyview_disable_rps(struct drm_device
*dev
)
3712 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
3714 I915_WRITE(GEN6_RC_CONTROL
, 0);
3716 gen6_disable_rps_interrupts(dev
);
3718 if (dev_priv
->vlv_pctx
) {
3719 drm_gem_object_unreference(&dev_priv
->vlv_pctx
->base
);
3720 dev_priv
->vlv_pctx
= NULL
;
3724 static void intel_print_rc6_info(struct drm_device
*dev
, u32 mode
)
3727 DRM_DEBUG_DRIVER("Sandybridge: deep RC6 disabled\n");
3729 if (IS_HASWELL(dev
))
3730 DRM_DEBUG_DRIVER("Haswell: only RC6 available\n");
3732 DRM_INFO("Enabling RC6 states: RC6 %s, RC6p %s, RC6pp %s\n",
3733 (mode
& GEN6_RC_CTL_RC6_ENABLE
) ? "on" : "off",
3734 (mode
& GEN6_RC_CTL_RC6p_ENABLE
) ? "on" : "off",
3735 (mode
& GEN6_RC_CTL_RC6pp_ENABLE
) ? "on" : "off");
3738 int intel_enable_rc6(const struct drm_device
*dev
)
3740 /* No RC6 before Ironlake */
3741 if (INTEL_INFO(dev
)->gen
< 5)
3744 /* Respect the kernel parameter if it is set */
3745 if (i915_enable_rc6
>= 0)
3746 return i915_enable_rc6
;
3748 /* Disable RC6 on Ironlake */
3749 if (INTEL_INFO(dev
)->gen
== 5)
3752 if (IS_HASWELL(dev
))
3753 return INTEL_RC6_ENABLE
;
3755 /* snb/ivb have more than one rc6 state. */
3756 if (INTEL_INFO(dev
)->gen
== 6)
3757 return INTEL_RC6_ENABLE
;
3759 return (INTEL_RC6_ENABLE
| INTEL_RC6p_ENABLE
);
3762 static void gen6_enable_rps_interrupts(struct drm_device
*dev
)
3764 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
3767 spin_lock_irq(&dev_priv
->irq_lock
);
3768 WARN_ON(dev_priv
->rps
.pm_iir
);
3769 snb_enable_pm_irq(dev_priv
, GEN6_PM_RPS_EVENTS
);
3770 I915_WRITE(GEN6_PMIIR
, GEN6_PM_RPS_EVENTS
);
3771 spin_unlock_irq(&dev_priv
->irq_lock
);
3773 /* only unmask PM interrupts we need. Mask all others. */
3774 enabled_intrs
= GEN6_PM_RPS_EVENTS
;
3776 /* IVB and SNB hard hangs on looping batchbuffer
3777 * if GEN6_PM_UP_EI_EXPIRED is masked.
3779 if (INTEL_INFO(dev
)->gen
<= 7 && !IS_HASWELL(dev
))
3780 enabled_intrs
|= GEN6_PM_RP_UP_EI_EXPIRED
;
3782 I915_WRITE(GEN6_PMINTRMSK
, ~enabled_intrs
);
3785 static void gen8_enable_rps(struct drm_device
*dev
)
3787 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
3788 struct intel_ring_buffer
*ring
;
3789 uint32_t rc6_mask
= 0, rp_state_cap
;
3792 /* 1a: Software RC state - RC0 */
3793 I915_WRITE(GEN6_RC_STATE
, 0);
3795 /* 1c & 1d: Get forcewake during program sequence. Although the driver
3796 * hasn't enabled a state yet where we need forcewake, BIOS may have.*/
3797 gen6_gt_force_wake_get(dev_priv
, FORCEWAKE_ALL
);
3799 /* 2a: Disable RC states. */
3800 I915_WRITE(GEN6_RC_CONTROL
, 0);
3802 rp_state_cap
= I915_READ(GEN6_RP_STATE_CAP
);
3804 /* 2b: Program RC6 thresholds.*/
3805 I915_WRITE(GEN6_RC6_WAKE_RATE_LIMIT
, 40 << 16);
3806 I915_WRITE(GEN6_RC_EVALUATION_INTERVAL
, 125000); /* 12500 * 1280ns */
3807 I915_WRITE(GEN6_RC_IDLE_HYSTERSIS
, 25); /* 25 * 1280ns */
3808 for_each_ring(ring
, dev_priv
, unused
)
3809 I915_WRITE(RING_MAX_IDLE(ring
->mmio_base
), 10);
3810 I915_WRITE(GEN6_RC_SLEEP
, 0);
3811 I915_WRITE(GEN6_RC6_THRESHOLD
, 50000); /* 50/125ms per EI */
3814 if (intel_enable_rc6(dev
) & INTEL_RC6_ENABLE
)
3815 rc6_mask
= GEN6_RC_CTL_RC6_ENABLE
;
3816 DRM_INFO("RC6 %s\n", (rc6_mask
& GEN6_RC_CTL_RC6_ENABLE
) ? "on" : "off");
3817 I915_WRITE(GEN6_RC_CONTROL
, GEN6_RC_CTL_HW_ENABLE
|
3818 GEN6_RC_CTL_EI_MODE(1) |
3821 /* 4 Program defaults and thresholds for RPS*/
3822 I915_WRITE(GEN6_RPNSWREQ
, HSW_FREQUENCY(10)); /* Request 500 MHz */
3823 I915_WRITE(GEN6_RC_VIDEO_FREQ
, HSW_FREQUENCY(12)); /* Request 600 MHz */
3824 /* NB: Docs say 1s, and 1000000 - which aren't equivalent */
3825 I915_WRITE(GEN6_RP_DOWN_TIMEOUT
, 100000000 / 128); /* 1 second timeout */
3827 /* Docs recommend 900MHz, and 300 MHz respectively */
3828 I915_WRITE(GEN6_RP_INTERRUPT_LIMITS
,
3829 dev_priv
->rps
.max_delay
<< 24 |
3830 dev_priv
->rps
.min_delay
<< 16);
3832 I915_WRITE(GEN6_RP_UP_THRESHOLD
, 7600000 / 128); /* 76ms busyness per EI, 90% */
3833 I915_WRITE(GEN6_RP_DOWN_THRESHOLD
, 31300000 / 128); /* 313ms busyness per EI, 70%*/
3834 I915_WRITE(GEN6_RP_UP_EI
, 66000); /* 84.48ms, XXX: random? */
3835 I915_WRITE(GEN6_RP_DOWN_EI
, 350000); /* 448ms, XXX: random? */
3837 I915_WRITE(GEN6_RP_IDLE_HYSTERSIS
, 10);
3840 I915_WRITE(GEN6_RP_CONTROL
,
3841 GEN6_RP_MEDIA_TURBO
|
3842 GEN6_RP_MEDIA_HW_NORMAL_MODE
|
3843 GEN6_RP_MEDIA_IS_GFX
|
3845 GEN6_RP_UP_BUSY_AVG
|
3846 GEN6_RP_DOWN_IDLE_AVG
);
3848 /* 6: Ring frequency + overclocking (our driver does this later */
3850 gen6_set_rps(dev
, (I915_READ(GEN6_GT_PERF_STATUS
) & 0xff00) >> 8);
3852 gen6_enable_rps_interrupts(dev
);
3854 gen6_gt_force_wake_put(dev_priv
, FORCEWAKE_ALL
);
3857 static void gen6_enable_rps(struct drm_device
*dev
)
3859 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
3860 struct intel_ring_buffer
*ring
;
3863 u32 rc6vids
, pcu_mbox
, rc6_mask
= 0;
3868 WARN_ON(!mutex_is_locked(&dev_priv
->rps
.hw_lock
));
3870 /* Here begins a magic sequence of register writes to enable
3871 * auto-downclocking.
3873 * Perhaps there might be some value in exposing these to
3876 I915_WRITE(GEN6_RC_STATE
, 0);
3878 /* Clear the DBG now so we don't confuse earlier errors */
3879 if ((gtfifodbg
= I915_READ(GTFIFODBG
))) {
3880 DRM_ERROR("GT fifo had a previous error %x\n", gtfifodbg
);
3881 I915_WRITE(GTFIFODBG
, gtfifodbg
);
3884 gen6_gt_force_wake_get(dev_priv
, FORCEWAKE_ALL
);
3886 rp_state_cap
= I915_READ(GEN6_RP_STATE_CAP
);
3887 gt_perf_status
= I915_READ(GEN6_GT_PERF_STATUS
);
3889 /* In units of 50MHz */
3890 dev_priv
->rps
.hw_max
= dev_priv
->rps
.max_delay
= rp_state_cap
& 0xff;
3891 dev_priv
->rps
.min_delay
= (rp_state_cap
>> 16) & 0xff;
3892 dev_priv
->rps
.rp1_delay
= (rp_state_cap
>> 8) & 0xff;
3893 dev_priv
->rps
.rp0_delay
= (rp_state_cap
>> 0) & 0xff;
3894 dev_priv
->rps
.rpe_delay
= dev_priv
->rps
.rp1_delay
;
3895 dev_priv
->rps
.cur_delay
= 0;
3897 /* disable the counters and set deterministic thresholds */
3898 I915_WRITE(GEN6_RC_CONTROL
, 0);
3900 I915_WRITE(GEN6_RC1_WAKE_RATE_LIMIT
, 1000 << 16);
3901 I915_WRITE(GEN6_RC6_WAKE_RATE_LIMIT
, 40 << 16 | 30);
3902 I915_WRITE(GEN6_RC6pp_WAKE_RATE_LIMIT
, 30);
3903 I915_WRITE(GEN6_RC_EVALUATION_INTERVAL
, 125000);
3904 I915_WRITE(GEN6_RC_IDLE_HYSTERSIS
, 25);
3906 for_each_ring(ring
, dev_priv
, i
)
3907 I915_WRITE(RING_MAX_IDLE(ring
->mmio_base
), 10);
3909 I915_WRITE(GEN6_RC_SLEEP
, 0);
3910 I915_WRITE(GEN6_RC1e_THRESHOLD
, 1000);
3911 if (IS_IVYBRIDGE(dev
))
3912 I915_WRITE(GEN6_RC6_THRESHOLD
, 125000);
3914 I915_WRITE(GEN6_RC6_THRESHOLD
, 50000);
3915 I915_WRITE(GEN6_RC6p_THRESHOLD
, 150000);
3916 I915_WRITE(GEN6_RC6pp_THRESHOLD
, 64000); /* unused */
3918 /* Check if we are enabling RC6 */
3919 rc6_mode
= intel_enable_rc6(dev_priv
->dev
);
3920 if (rc6_mode
& INTEL_RC6_ENABLE
)
3921 rc6_mask
|= GEN6_RC_CTL_RC6_ENABLE
;
3923 /* We don't use those on Haswell */
3924 if (!IS_HASWELL(dev
)) {
3925 if (rc6_mode
& INTEL_RC6p_ENABLE
)
3926 rc6_mask
|= GEN6_RC_CTL_RC6p_ENABLE
;
3928 if (rc6_mode
& INTEL_RC6pp_ENABLE
)
3929 rc6_mask
|= GEN6_RC_CTL_RC6pp_ENABLE
;
3932 intel_print_rc6_info(dev
, rc6_mask
);
3934 I915_WRITE(GEN6_RC_CONTROL
,
3936 GEN6_RC_CTL_EI_MODE(1) |
3937 GEN6_RC_CTL_HW_ENABLE
);
3939 /* Power down if completely idle for over 50ms */
3940 I915_WRITE(GEN6_RP_DOWN_TIMEOUT
, 50000);
3941 I915_WRITE(GEN6_RP_IDLE_HYSTERSIS
, 10);
3943 ret
= sandybridge_pcode_write(dev_priv
, GEN6_PCODE_WRITE_MIN_FREQ_TABLE
, 0);
3946 ret
= sandybridge_pcode_read(dev_priv
, GEN6_READ_OC_PARAMS
, &pcu_mbox
);
3947 if (!ret
&& (pcu_mbox
& (1<<31))) { /* OC supported */
3948 DRM_DEBUG_DRIVER("Overclocking supported. Max: %dMHz, Overclock max: %dMHz\n",
3949 (dev_priv
->rps
.max_delay
& 0xff) * 50,
3950 (pcu_mbox
& 0xff) * 50);
3951 dev_priv
->rps
.hw_max
= pcu_mbox
& 0xff;
3954 DRM_DEBUG_DRIVER("Failed to set the min frequency\n");
3957 dev_priv
->rps
.power
= HIGH_POWER
; /* force a reset */
3958 gen6_set_rps(dev_priv
->dev
, dev_priv
->rps
.min_delay
);
3960 gen6_enable_rps_interrupts(dev
);
3963 ret
= sandybridge_pcode_read(dev_priv
, GEN6_PCODE_READ_RC6VIDS
, &rc6vids
);
3964 if (IS_GEN6(dev
) && ret
) {
3965 DRM_DEBUG_DRIVER("Couldn't check for BIOS workaround\n");
3966 } else if (IS_GEN6(dev
) && (GEN6_DECODE_RC6_VID(rc6vids
& 0xff) < 450)) {
3967 DRM_DEBUG_DRIVER("You should update your BIOS. Correcting minimum rc6 voltage (%dmV->%dmV)\n",
3968 GEN6_DECODE_RC6_VID(rc6vids
& 0xff), 450);
3969 rc6vids
&= 0xffff00;
3970 rc6vids
|= GEN6_ENCODE_RC6_VID(450);
3971 ret
= sandybridge_pcode_write(dev_priv
, GEN6_PCODE_WRITE_RC6VIDS
, rc6vids
);
3973 DRM_ERROR("Couldn't fix incorrect rc6 voltage\n");
3976 gen6_gt_force_wake_put(dev_priv
, FORCEWAKE_ALL
);
3979 void gen6_update_ring_freq(struct drm_device
*dev
)
3981 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
3983 unsigned int gpu_freq
;
3984 unsigned int max_ia_freq
, min_ring_freq
;
3985 int scaling_factor
= 180;
3986 struct cpufreq_policy
*policy
;
3988 WARN_ON(!mutex_is_locked(&dev_priv
->rps
.hw_lock
));
3990 policy
= cpufreq_cpu_get(0);
3992 max_ia_freq
= policy
->cpuinfo
.max_freq
;
3993 cpufreq_cpu_put(policy
);
3996 * Default to measured freq if none found, PCU will ensure we
3999 max_ia_freq
= tsc_khz
;
4002 /* Convert from kHz to MHz */
4003 max_ia_freq
/= 1000;
4005 min_ring_freq
= I915_READ(DCLK
) & 0xf;
4006 /* convert DDR frequency from units of 266.6MHz to bandwidth */
4007 min_ring_freq
= mult_frac(min_ring_freq
, 8, 3);
4010 * For each potential GPU frequency, load a ring frequency we'd like
4011 * to use for memory access. We do this by specifying the IA frequency
4012 * the PCU should use as a reference to determine the ring frequency.
4014 for (gpu_freq
= dev_priv
->rps
.max_delay
; gpu_freq
>= dev_priv
->rps
.min_delay
;
4016 int diff
= dev_priv
->rps
.max_delay
- gpu_freq
;
4017 unsigned int ia_freq
= 0, ring_freq
= 0;
4019 if (INTEL_INFO(dev
)->gen
>= 8) {
4020 /* max(2 * GT, DDR). NB: GT is 50MHz units */
4021 ring_freq
= max(min_ring_freq
, gpu_freq
);
4022 } else if (IS_HASWELL(dev
)) {
4023 ring_freq
= mult_frac(gpu_freq
, 5, 4);
4024 ring_freq
= max(min_ring_freq
, ring_freq
);
4025 /* leave ia_freq as the default, chosen by cpufreq */
4027 /* On older processors, there is no separate ring
4028 * clock domain, so in order to boost the bandwidth
4029 * of the ring, we need to upclock the CPU (ia_freq).
4031 * For GPU frequencies less than 750MHz,
4032 * just use the lowest ring freq.
4034 if (gpu_freq
< min_freq
)
4037 ia_freq
= max_ia_freq
- ((diff
* scaling_factor
) / 2);
4038 ia_freq
= DIV_ROUND_CLOSEST(ia_freq
, 100);
4041 sandybridge_pcode_write(dev_priv
,
4042 GEN6_PCODE_WRITE_MIN_FREQ_TABLE
,
4043 ia_freq
<< GEN6_PCODE_FREQ_IA_RATIO_SHIFT
|
4044 ring_freq
<< GEN6_PCODE_FREQ_RING_RATIO_SHIFT
|
4049 int valleyview_rps_max_freq(struct drm_i915_private
*dev_priv
)
4053 val
= vlv_nc_read(dev_priv
, IOSF_NC_FB_GFX_FREQ_FUSE
);
4055 rp0
= (val
& FB_GFX_MAX_FREQ_FUSE_MASK
) >> FB_GFX_MAX_FREQ_FUSE_SHIFT
;
4057 rp0
= min_t(u32
, rp0
, 0xea);
4062 static int valleyview_rps_rpe_freq(struct drm_i915_private
*dev_priv
)
4066 val
= vlv_nc_read(dev_priv
, IOSF_NC_FB_GFX_FMAX_FUSE_LO
);
4067 rpe
= (val
& FB_FMAX_VMIN_FREQ_LO_MASK
) >> FB_FMAX_VMIN_FREQ_LO_SHIFT
;
4068 val
= vlv_nc_read(dev_priv
, IOSF_NC_FB_GFX_FMAX_FUSE_HI
);
4069 rpe
|= (val
& FB_FMAX_VMIN_FREQ_HI_MASK
) << 5;
4074 int valleyview_rps_min_freq(struct drm_i915_private
*dev_priv
)
4076 return vlv_punit_read(dev_priv
, PUNIT_REG_GPU_LFM
) & 0xff;
4079 static void valleyview_setup_pctx(struct drm_device
*dev
)
4081 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
4082 struct drm_i915_gem_object
*pctx
;
4083 unsigned long pctx_paddr
;
4085 int pctx_size
= 24*1024;
4087 pcbr
= I915_READ(VLV_PCBR
);
4089 /* BIOS set it up already, grab the pre-alloc'd space */
4092 pcbr_offset
= (pcbr
& (~4095)) - dev_priv
->mm
.stolen_base
;
4093 pctx
= i915_gem_object_create_stolen_for_preallocated(dev_priv
->dev
,
4095 I915_GTT_OFFSET_NONE
,
4101 * From the Gunit register HAS:
4102 * The Gfx driver is expected to program this register and ensure
4103 * proper allocation within Gfx stolen memory. For example, this
4104 * register should be programmed such than the PCBR range does not
4105 * overlap with other ranges, such as the frame buffer, protected
4106 * memory, or any other relevant ranges.
4108 pctx
= i915_gem_object_create_stolen(dev
, pctx_size
);
4110 DRM_DEBUG("not enough stolen space for PCTX, disabling\n");
4114 pctx_paddr
= dev_priv
->mm
.stolen_base
+ pctx
->stolen
->start
;
4115 I915_WRITE(VLV_PCBR
, pctx_paddr
);
4118 dev_priv
->vlv_pctx
= pctx
;
4121 static void valleyview_enable_rps(struct drm_device
*dev
)
4123 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
4124 struct intel_ring_buffer
*ring
;
4125 u32 gtfifodbg
, val
, rc6_mode
= 0;
4128 WARN_ON(!mutex_is_locked(&dev_priv
->rps
.hw_lock
));
4130 if ((gtfifodbg
= I915_READ(GTFIFODBG
))) {
4131 DRM_DEBUG_DRIVER("GT fifo had a previous error %x\n",
4133 I915_WRITE(GTFIFODBG
, gtfifodbg
);
4136 valleyview_setup_pctx(dev
);
4138 /* If VLV, Forcewake all wells, else re-direct to regular path */
4139 gen6_gt_force_wake_get(dev_priv
, FORCEWAKE_ALL
);
4141 I915_WRITE(GEN6_RP_UP_THRESHOLD
, 59400);
4142 I915_WRITE(GEN6_RP_DOWN_THRESHOLD
, 245000);
4143 I915_WRITE(GEN6_RP_UP_EI
, 66000);
4144 I915_WRITE(GEN6_RP_DOWN_EI
, 350000);
4146 I915_WRITE(GEN6_RP_IDLE_HYSTERSIS
, 10);
4148 I915_WRITE(GEN6_RP_CONTROL
,
4149 GEN6_RP_MEDIA_TURBO
|
4150 GEN6_RP_MEDIA_HW_NORMAL_MODE
|
4151 GEN6_RP_MEDIA_IS_GFX
|
4153 GEN6_RP_UP_BUSY_AVG
|
4154 GEN6_RP_DOWN_IDLE_CONT
);
4156 I915_WRITE(GEN6_RC6_WAKE_RATE_LIMIT
, 0x00280000);
4157 I915_WRITE(GEN6_RC_EVALUATION_INTERVAL
, 125000);
4158 I915_WRITE(GEN6_RC_IDLE_HYSTERSIS
, 25);
4160 for_each_ring(ring
, dev_priv
, i
)
4161 I915_WRITE(RING_MAX_IDLE(ring
->mmio_base
), 10);
4163 I915_WRITE(GEN6_RC6_THRESHOLD
, 0x557);
4165 /* allows RC6 residency counter to work */
4166 I915_WRITE(VLV_COUNTER_CONTROL
,
4167 _MASKED_BIT_ENABLE(VLV_COUNT_RANGE_HIGH
|
4168 VLV_MEDIA_RC6_COUNT_EN
|
4169 VLV_RENDER_RC6_COUNT_EN
));
4170 if (intel_enable_rc6(dev
) & INTEL_RC6_ENABLE
)
4171 rc6_mode
= GEN7_RC_CTL_TO_MODE
| VLV_RC_CTL_CTX_RST_PARALLEL
;
4173 intel_print_rc6_info(dev
, rc6_mode
);
4175 I915_WRITE(GEN6_RC_CONTROL
, rc6_mode
);
4177 val
= vlv_punit_read(dev_priv
, PUNIT_REG_GPU_FREQ_STS
);
4179 DRM_DEBUG_DRIVER("GPLL enabled? %s\n", val
& 0x10 ? "yes" : "no");
4180 DRM_DEBUG_DRIVER("GPU status: 0x%08x\n", val
);
4182 dev_priv
->rps
.cur_delay
= (val
>> 8) & 0xff;
4183 DRM_DEBUG_DRIVER("current GPU freq: %d MHz (%u)\n",
4184 vlv_gpu_freq(dev_priv
, dev_priv
->rps
.cur_delay
),
4185 dev_priv
->rps
.cur_delay
);
4187 dev_priv
->rps
.max_delay
= valleyview_rps_max_freq(dev_priv
);
4188 dev_priv
->rps
.hw_max
= dev_priv
->rps
.max_delay
;
4189 DRM_DEBUG_DRIVER("max GPU freq: %d MHz (%u)\n",
4190 vlv_gpu_freq(dev_priv
, dev_priv
->rps
.max_delay
),
4191 dev_priv
->rps
.max_delay
);
4193 dev_priv
->rps
.rpe_delay
= valleyview_rps_rpe_freq(dev_priv
);
4194 DRM_DEBUG_DRIVER("RPe GPU freq: %d MHz (%u)\n",
4195 vlv_gpu_freq(dev_priv
, dev_priv
->rps
.rpe_delay
),
4196 dev_priv
->rps
.rpe_delay
);
4198 dev_priv
->rps
.min_delay
= valleyview_rps_min_freq(dev_priv
);
4199 DRM_DEBUG_DRIVER("min GPU freq: %d MHz (%u)\n",
4200 vlv_gpu_freq(dev_priv
, dev_priv
->rps
.min_delay
),
4201 dev_priv
->rps
.min_delay
);
4203 DRM_DEBUG_DRIVER("setting GPU freq to %d MHz (%u)\n",
4204 vlv_gpu_freq(dev_priv
, dev_priv
->rps
.rpe_delay
),
4205 dev_priv
->rps
.rpe_delay
);
4207 valleyview_set_rps(dev_priv
->dev
, dev_priv
->rps
.rpe_delay
);
4209 gen6_enable_rps_interrupts(dev
);
4211 gen6_gt_force_wake_put(dev_priv
, FORCEWAKE_ALL
);
4214 void ironlake_teardown_rc6(struct drm_device
*dev
)
4216 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
4218 if (dev_priv
->ips
.renderctx
) {
4219 i915_gem_object_unpin(dev_priv
->ips
.renderctx
);
4220 drm_gem_object_unreference(&dev_priv
->ips
.renderctx
->base
);
4221 dev_priv
->ips
.renderctx
= NULL
;
4224 if (dev_priv
->ips
.pwrctx
) {
4225 i915_gem_object_unpin(dev_priv
->ips
.pwrctx
);
4226 drm_gem_object_unreference(&dev_priv
->ips
.pwrctx
->base
);
4227 dev_priv
->ips
.pwrctx
= NULL
;
4231 static void ironlake_disable_rc6(struct drm_device
*dev
)
4233 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
4235 if (I915_READ(PWRCTXA
)) {
4236 /* Wake the GPU, prevent RC6, then restore RSTDBYCTL */
4237 I915_WRITE(RSTDBYCTL
, I915_READ(RSTDBYCTL
) | RCX_SW_EXIT
);
4238 wait_for(((I915_READ(RSTDBYCTL
) & RSX_STATUS_MASK
) == RSX_STATUS_ON
),
4241 I915_WRITE(PWRCTXA
, 0);
4242 POSTING_READ(PWRCTXA
);
4244 I915_WRITE(RSTDBYCTL
, I915_READ(RSTDBYCTL
) & ~RCX_SW_EXIT
);
4245 POSTING_READ(RSTDBYCTL
);
4249 static int ironlake_setup_rc6(struct drm_device
*dev
)
4251 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
4253 if (dev_priv
->ips
.renderctx
== NULL
)
4254 dev_priv
->ips
.renderctx
= intel_alloc_context_page(dev
);
4255 if (!dev_priv
->ips
.renderctx
)
4258 if (dev_priv
->ips
.pwrctx
== NULL
)
4259 dev_priv
->ips
.pwrctx
= intel_alloc_context_page(dev
);
4260 if (!dev_priv
->ips
.pwrctx
) {
4261 ironlake_teardown_rc6(dev
);
4268 static void ironlake_enable_rc6(struct drm_device
*dev
)
4270 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
4271 struct intel_ring_buffer
*ring
= &dev_priv
->ring
[RCS
];
4272 bool was_interruptible
;
4275 /* rc6 disabled by default due to repeated reports of hanging during
4278 if (!intel_enable_rc6(dev
))
4281 WARN_ON(!mutex_is_locked(&dev
->struct_mutex
));
4283 ret
= ironlake_setup_rc6(dev
);
4287 was_interruptible
= dev_priv
->mm
.interruptible
;
4288 dev_priv
->mm
.interruptible
= false;
4291 * GPU can automatically power down the render unit if given a page
4294 ret
= intel_ring_begin(ring
, 6);
4296 ironlake_teardown_rc6(dev
);
4297 dev_priv
->mm
.interruptible
= was_interruptible
;
4301 intel_ring_emit(ring
, MI_SUSPEND_FLUSH
| MI_SUSPEND_FLUSH_EN
);
4302 intel_ring_emit(ring
, MI_SET_CONTEXT
);
4303 intel_ring_emit(ring
, i915_gem_obj_ggtt_offset(dev_priv
->ips
.renderctx
) |
4305 MI_SAVE_EXT_STATE_EN
|
4306 MI_RESTORE_EXT_STATE_EN
|
4307 MI_RESTORE_INHIBIT
);
4308 intel_ring_emit(ring
, MI_SUSPEND_FLUSH
);
4309 intel_ring_emit(ring
, MI_NOOP
);
4310 intel_ring_emit(ring
, MI_FLUSH
);
4311 intel_ring_advance(ring
);
4314 * Wait for the command parser to advance past MI_SET_CONTEXT. The HW
4315 * does an implicit flush, combined with MI_FLUSH above, it should be
4316 * safe to assume that renderctx is valid
4318 ret
= intel_ring_idle(ring
);
4319 dev_priv
->mm
.interruptible
= was_interruptible
;
4321 DRM_ERROR("failed to enable ironlake power savings\n");
4322 ironlake_teardown_rc6(dev
);
4326 I915_WRITE(PWRCTXA
, i915_gem_obj_ggtt_offset(dev_priv
->ips
.pwrctx
) | PWRCTX_EN
);
4327 I915_WRITE(RSTDBYCTL
, I915_READ(RSTDBYCTL
) & ~RCX_SW_EXIT
);
4329 intel_print_rc6_info(dev
, INTEL_RC6_ENABLE
);
4332 static unsigned long intel_pxfreq(u32 vidfreq
)
4335 int div
= (vidfreq
& 0x3f0000) >> 16;
4336 int post
= (vidfreq
& 0x3000) >> 12;
4337 int pre
= (vidfreq
& 0x7);
4342 freq
= ((div
* 133333) / ((1<<post
) * pre
));
4347 static const struct cparams
{
4353 { 1, 1333, 301, 28664 },
4354 { 1, 1066, 294, 24460 },
4355 { 1, 800, 294, 25192 },
4356 { 0, 1333, 276, 27605 },
4357 { 0, 1066, 276, 27605 },
4358 { 0, 800, 231, 23784 },
4361 static unsigned long __i915_chipset_val(struct drm_i915_private
*dev_priv
)
4363 u64 total_count
, diff
, ret
;
4364 u32 count1
, count2
, count3
, m
= 0, c
= 0;
4365 unsigned long now
= jiffies_to_msecs(jiffies
), diff1
;
4368 assert_spin_locked(&mchdev_lock
);
4370 diff1
= now
- dev_priv
->ips
.last_time1
;
4372 /* Prevent division-by-zero if we are asking too fast.
4373 * Also, we don't get interesting results if we are polling
4374 * faster than once in 10ms, so just return the saved value
4378 return dev_priv
->ips
.chipset_power
;
4380 count1
= I915_READ(DMIEC
);
4381 count2
= I915_READ(DDREC
);
4382 count3
= I915_READ(CSIEC
);
4384 total_count
= count1
+ count2
+ count3
;
4386 /* FIXME: handle per-counter overflow */
4387 if (total_count
< dev_priv
->ips
.last_count1
) {
4388 diff
= ~0UL - dev_priv
->ips
.last_count1
;
4389 diff
+= total_count
;
4391 diff
= total_count
- dev_priv
->ips
.last_count1
;
4394 for (i
= 0; i
< ARRAY_SIZE(cparams
); i
++) {
4395 if (cparams
[i
].i
== dev_priv
->ips
.c_m
&&
4396 cparams
[i
].t
== dev_priv
->ips
.r_t
) {
4403 diff
= div_u64(diff
, diff1
);
4404 ret
= ((m
* diff
) + c
);
4405 ret
= div_u64(ret
, 10);
4407 dev_priv
->ips
.last_count1
= total_count
;
4408 dev_priv
->ips
.last_time1
= now
;
4410 dev_priv
->ips
.chipset_power
= ret
;
4415 unsigned long i915_chipset_val(struct drm_i915_private
*dev_priv
)
4419 if (dev_priv
->info
->gen
!= 5)
4422 spin_lock_irq(&mchdev_lock
);
4424 val
= __i915_chipset_val(dev_priv
);
4426 spin_unlock_irq(&mchdev_lock
);
4431 unsigned long i915_mch_val(struct drm_i915_private
*dev_priv
)
4433 unsigned long m
, x
, b
;
4436 tsfs
= I915_READ(TSFS
);
4438 m
= ((tsfs
& TSFS_SLOPE_MASK
) >> TSFS_SLOPE_SHIFT
);
4439 x
= I915_READ8(TR1
);
4441 b
= tsfs
& TSFS_INTR_MASK
;
4443 return ((m
* x
) / 127) - b
;
4446 static u16
pvid_to_extvid(struct drm_i915_private
*dev_priv
, u8 pxvid
)
4448 static const struct v_table
{
4449 u16 vd
; /* in .1 mil */
4450 u16 vm
; /* in .1 mil */
4581 if (dev_priv
->info
->is_mobile
)
4582 return v_table
[pxvid
].vm
;
4584 return v_table
[pxvid
].vd
;
4587 static void __i915_update_gfx_val(struct drm_i915_private
*dev_priv
)
4589 struct timespec now
, diff1
;
4591 unsigned long diffms
;
4594 assert_spin_locked(&mchdev_lock
);
4596 getrawmonotonic(&now
);
4597 diff1
= timespec_sub(now
, dev_priv
->ips
.last_time2
);
4599 /* Don't divide by 0 */
4600 diffms
= diff1
.tv_sec
* 1000 + diff1
.tv_nsec
/ 1000000;
4604 count
= I915_READ(GFXEC
);
4606 if (count
< dev_priv
->ips
.last_count2
) {
4607 diff
= ~0UL - dev_priv
->ips
.last_count2
;
4610 diff
= count
- dev_priv
->ips
.last_count2
;
4613 dev_priv
->ips
.last_count2
= count
;
4614 dev_priv
->ips
.last_time2
= now
;
4616 /* More magic constants... */
4618 diff
= div_u64(diff
, diffms
* 10);
4619 dev_priv
->ips
.gfx_power
= diff
;
4622 void i915_update_gfx_val(struct drm_i915_private
*dev_priv
)
4624 if (dev_priv
->info
->gen
!= 5)
4627 spin_lock_irq(&mchdev_lock
);
4629 __i915_update_gfx_val(dev_priv
);
4631 spin_unlock_irq(&mchdev_lock
);
4634 static unsigned long __i915_gfx_val(struct drm_i915_private
*dev_priv
)
4636 unsigned long t
, corr
, state1
, corr2
, state2
;
4639 assert_spin_locked(&mchdev_lock
);
4641 pxvid
= I915_READ(PXVFREQ_BASE
+ (dev_priv
->rps
.cur_delay
* 4));
4642 pxvid
= (pxvid
>> 24) & 0x7f;
4643 ext_v
= pvid_to_extvid(dev_priv
, pxvid
);
4647 t
= i915_mch_val(dev_priv
);
4649 /* Revel in the empirically derived constants */
4651 /* Correction factor in 1/100000 units */
4653 corr
= ((t
* 2349) + 135940);
4655 corr
= ((t
* 964) + 29317);
4657 corr
= ((t
* 301) + 1004);
4659 corr
= corr
* ((150142 * state1
) / 10000 - 78642);
4661 corr2
= (corr
* dev_priv
->ips
.corr
);
4663 state2
= (corr2
* state1
) / 10000;
4664 state2
/= 100; /* convert to mW */
4666 __i915_update_gfx_val(dev_priv
);
4668 return dev_priv
->ips
.gfx_power
+ state2
;
4671 unsigned long i915_gfx_val(struct drm_i915_private
*dev_priv
)
4675 if (dev_priv
->info
->gen
!= 5)
4678 spin_lock_irq(&mchdev_lock
);
4680 val
= __i915_gfx_val(dev_priv
);
4682 spin_unlock_irq(&mchdev_lock
);
4688 * i915_read_mch_val - return value for IPS use
4690 * Calculate and return a value for the IPS driver to use when deciding whether
4691 * we have thermal and power headroom to increase CPU or GPU power budget.
4693 unsigned long i915_read_mch_val(void)
4695 struct drm_i915_private
*dev_priv
;
4696 unsigned long chipset_val
, graphics_val
, ret
= 0;
4698 spin_lock_irq(&mchdev_lock
);
4701 dev_priv
= i915_mch_dev
;
4703 chipset_val
= __i915_chipset_val(dev_priv
);
4704 graphics_val
= __i915_gfx_val(dev_priv
);
4706 ret
= chipset_val
+ graphics_val
;
4709 spin_unlock_irq(&mchdev_lock
);
4713 EXPORT_SYMBOL_GPL(i915_read_mch_val
);
4716 * i915_gpu_raise - raise GPU frequency limit
4718 * Raise the limit; IPS indicates we have thermal headroom.
4720 bool i915_gpu_raise(void)
4722 struct drm_i915_private
*dev_priv
;
4725 spin_lock_irq(&mchdev_lock
);
4726 if (!i915_mch_dev
) {
4730 dev_priv
= i915_mch_dev
;
4732 if (dev_priv
->ips
.max_delay
> dev_priv
->ips
.fmax
)
4733 dev_priv
->ips
.max_delay
--;
4736 spin_unlock_irq(&mchdev_lock
);
4740 EXPORT_SYMBOL_GPL(i915_gpu_raise
);
4743 * i915_gpu_lower - lower GPU frequency limit
4745 * IPS indicates we're close to a thermal limit, so throttle back the GPU
4746 * frequency maximum.
4748 bool i915_gpu_lower(void)
4750 struct drm_i915_private
*dev_priv
;
4753 spin_lock_irq(&mchdev_lock
);
4754 if (!i915_mch_dev
) {
4758 dev_priv
= i915_mch_dev
;
4760 if (dev_priv
->ips
.max_delay
< dev_priv
->ips
.min_delay
)
4761 dev_priv
->ips
.max_delay
++;
4764 spin_unlock_irq(&mchdev_lock
);
4768 EXPORT_SYMBOL_GPL(i915_gpu_lower
);
4771 * i915_gpu_busy - indicate GPU business to IPS
4773 * Tell the IPS driver whether or not the GPU is busy.
4775 bool i915_gpu_busy(void)
4777 struct drm_i915_private
*dev_priv
;
4778 struct intel_ring_buffer
*ring
;
4782 spin_lock_irq(&mchdev_lock
);
4785 dev_priv
= i915_mch_dev
;
4787 for_each_ring(ring
, dev_priv
, i
)
4788 ret
|= !list_empty(&ring
->request_list
);
4791 spin_unlock_irq(&mchdev_lock
);
4795 EXPORT_SYMBOL_GPL(i915_gpu_busy
);
4798 * i915_gpu_turbo_disable - disable graphics turbo
4800 * Disable graphics turbo by resetting the max frequency and setting the
4801 * current frequency to the default.
4803 bool i915_gpu_turbo_disable(void)
4805 struct drm_i915_private
*dev_priv
;
4808 spin_lock_irq(&mchdev_lock
);
4809 if (!i915_mch_dev
) {
4813 dev_priv
= i915_mch_dev
;
4815 dev_priv
->ips
.max_delay
= dev_priv
->ips
.fstart
;
4817 if (!ironlake_set_drps(dev_priv
->dev
, dev_priv
->ips
.fstart
))
4821 spin_unlock_irq(&mchdev_lock
);
4825 EXPORT_SYMBOL_GPL(i915_gpu_turbo_disable
);
4828 * Tells the intel_ips driver that the i915 driver is now loaded, if
4829 * IPS got loaded first.
4831 * This awkward dance is so that neither module has to depend on the
4832 * other in order for IPS to do the appropriate communication of
4833 * GPU turbo limits to i915.
4836 ips_ping_for_i915_load(void)
4840 link
= symbol_get(ips_link_to_i915_driver
);
4843 symbol_put(ips_link_to_i915_driver
);
4847 void intel_gpu_ips_init(struct drm_i915_private
*dev_priv
)
4849 /* We only register the i915 ips part with intel-ips once everything is
4850 * set up, to avoid intel-ips sneaking in and reading bogus values. */
4851 spin_lock_irq(&mchdev_lock
);
4852 i915_mch_dev
= dev_priv
;
4853 spin_unlock_irq(&mchdev_lock
);
4855 ips_ping_for_i915_load();
4858 void intel_gpu_ips_teardown(void)
4860 spin_lock_irq(&mchdev_lock
);
4861 i915_mch_dev
= NULL
;
4862 spin_unlock_irq(&mchdev_lock
);
4864 static void intel_init_emon(struct drm_device
*dev
)
4866 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
4871 /* Disable to program */
4875 /* Program energy weights for various events */
4876 I915_WRITE(SDEW
, 0x15040d00);
4877 I915_WRITE(CSIEW0
, 0x007f0000);
4878 I915_WRITE(CSIEW1
, 0x1e220004);
4879 I915_WRITE(CSIEW2
, 0x04000004);
4881 for (i
= 0; i
< 5; i
++)
4882 I915_WRITE(PEW
+ (i
* 4), 0);
4883 for (i
= 0; i
< 3; i
++)
4884 I915_WRITE(DEW
+ (i
* 4), 0);
4886 /* Program P-state weights to account for frequency power adjustment */
4887 for (i
= 0; i
< 16; i
++) {
4888 u32 pxvidfreq
= I915_READ(PXVFREQ_BASE
+ (i
* 4));
4889 unsigned long freq
= intel_pxfreq(pxvidfreq
);
4890 unsigned long vid
= (pxvidfreq
& PXVFREQ_PX_MASK
) >>
4895 val
*= (freq
/ 1000);
4897 val
/= (127*127*900);
4899 DRM_ERROR("bad pxval: %ld\n", val
);
4902 /* Render standby states get 0 weight */
4906 for (i
= 0; i
< 4; i
++) {
4907 u32 val
= (pxw
[i
*4] << 24) | (pxw
[(i
*4)+1] << 16) |
4908 (pxw
[(i
*4)+2] << 8) | (pxw
[(i
*4)+3]);
4909 I915_WRITE(PXW
+ (i
* 4), val
);
4912 /* Adjust magic regs to magic values (more experimental results) */
4913 I915_WRITE(OGW0
, 0);
4914 I915_WRITE(OGW1
, 0);
4915 I915_WRITE(EG0
, 0x00007f00);
4916 I915_WRITE(EG1
, 0x0000000e);
4917 I915_WRITE(EG2
, 0x000e0000);
4918 I915_WRITE(EG3
, 0x68000300);
4919 I915_WRITE(EG4
, 0x42000000);
4920 I915_WRITE(EG5
, 0x00140031);
4924 for (i
= 0; i
< 8; i
++)
4925 I915_WRITE(PXWL
+ (i
* 4), 0);
4927 /* Enable PMON + select events */
4928 I915_WRITE(ECR
, 0x80000019);
4930 lcfuse
= I915_READ(LCFUSE02
);
4932 dev_priv
->ips
.corr
= (lcfuse
& LCFUSE_HIV_MASK
);
4935 void intel_disable_gt_powersave(struct drm_device
*dev
)
4937 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
4939 /* Interrupts should be disabled already to avoid re-arming. */
4940 WARN_ON(dev
->irq_enabled
);
4942 if (IS_IRONLAKE_M(dev
)) {
4943 ironlake_disable_drps(dev
);
4944 ironlake_disable_rc6(dev
);
4945 } else if (INTEL_INFO(dev
)->gen
>= 6) {
4946 cancel_delayed_work_sync(&dev_priv
->rps
.delayed_resume_work
);
4947 cancel_work_sync(&dev_priv
->rps
.work
);
4948 mutex_lock(&dev_priv
->rps
.hw_lock
);
4949 if (IS_VALLEYVIEW(dev
))
4950 valleyview_disable_rps(dev
);
4952 gen6_disable_rps(dev
);
4953 dev_priv
->rps
.enabled
= false;
4954 mutex_unlock(&dev_priv
->rps
.hw_lock
);
4958 static void intel_gen6_powersave_work(struct work_struct
*work
)
4960 struct drm_i915_private
*dev_priv
=
4961 container_of(work
, struct drm_i915_private
,
4962 rps
.delayed_resume_work
.work
);
4963 struct drm_device
*dev
= dev_priv
->dev
;
4965 mutex_lock(&dev_priv
->rps
.hw_lock
);
4967 if (IS_VALLEYVIEW(dev
)) {
4968 valleyview_enable_rps(dev
);
4969 } else if (IS_BROADWELL(dev
)) {
4970 gen8_enable_rps(dev
);
4971 gen6_update_ring_freq(dev
);
4973 gen6_enable_rps(dev
);
4974 gen6_update_ring_freq(dev
);
4976 dev_priv
->rps
.enabled
= true;
4977 mutex_unlock(&dev_priv
->rps
.hw_lock
);
4980 void intel_enable_gt_powersave(struct drm_device
*dev
)
4982 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
4984 if (IS_IRONLAKE_M(dev
)) {
4985 ironlake_enable_drps(dev
);
4986 ironlake_enable_rc6(dev
);
4987 intel_init_emon(dev
);
4988 } else if (IS_GEN6(dev
) || IS_GEN7(dev
)) {
4990 * PCU communication is slow and this doesn't need to be
4991 * done at any specific time, so do this out of our fast path
4992 * to make resume and init faster.
4994 schedule_delayed_work(&dev_priv
->rps
.delayed_resume_work
,
4995 round_jiffies_up_relative(HZ
));
4999 static void ibx_init_clock_gating(struct drm_device
*dev
)
5001 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
5004 * On Ibex Peak and Cougar Point, we need to disable clock
5005 * gating for the panel power sequencer or it will fail to
5006 * start up when no ports are active.
5008 I915_WRITE(SOUTH_DSPCLK_GATE_D
, PCH_DPLSUNIT_CLOCK_GATE_DISABLE
);
5011 static void g4x_disable_trickle_feed(struct drm_device
*dev
)
5013 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
5016 for_each_pipe(pipe
) {
5017 I915_WRITE(DSPCNTR(pipe
),
5018 I915_READ(DSPCNTR(pipe
)) |
5019 DISPPLANE_TRICKLE_FEED_DISABLE
);
5020 intel_flush_primary_plane(dev_priv
, pipe
);
5024 static void ironlake_init_clock_gating(struct drm_device
*dev
)
5026 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
5027 uint32_t dspclk_gate
= ILK_VRHUNIT_CLOCK_GATE_DISABLE
;
5031 * WaFbcDisableDpfcClockGating:ilk
5033 dspclk_gate
|= ILK_DPFCRUNIT_CLOCK_GATE_DISABLE
|
5034 ILK_DPFCUNIT_CLOCK_GATE_DISABLE
|
5035 ILK_DPFDUNIT_CLOCK_GATE_ENABLE
;
5037 I915_WRITE(PCH_3DCGDIS0
,
5038 MARIUNIT_CLOCK_GATE_DISABLE
|
5039 SVSMUNIT_CLOCK_GATE_DISABLE
);
5040 I915_WRITE(PCH_3DCGDIS1
,
5041 VFMUNIT_CLOCK_GATE_DISABLE
);
5044 * According to the spec the following bits should be set in
5045 * order to enable memory self-refresh
5046 * The bit 22/21 of 0x42004
5047 * The bit 5 of 0x42020
5048 * The bit 15 of 0x45000
5050 I915_WRITE(ILK_DISPLAY_CHICKEN2
,
5051 (I915_READ(ILK_DISPLAY_CHICKEN2
) |
5052 ILK_DPARB_GATE
| ILK_VSDPFD_FULL
));
5053 dspclk_gate
|= ILK_DPARBUNIT_CLOCK_GATE_ENABLE
;
5054 I915_WRITE(DISP_ARB_CTL
,
5055 (I915_READ(DISP_ARB_CTL
) |
5057 I915_WRITE(WM3_LP_ILK
, 0);
5058 I915_WRITE(WM2_LP_ILK
, 0);
5059 I915_WRITE(WM1_LP_ILK
, 0);
5062 * Based on the document from hardware guys the following bits
5063 * should be set unconditionally in order to enable FBC.
5064 * The bit 22 of 0x42000
5065 * The bit 22 of 0x42004
5066 * The bit 7,8,9 of 0x42020.
5068 if (IS_IRONLAKE_M(dev
)) {
5069 /* WaFbcAsynchFlipDisableFbcQueue:ilk */
5070 I915_WRITE(ILK_DISPLAY_CHICKEN1
,
5071 I915_READ(ILK_DISPLAY_CHICKEN1
) |
5073 I915_WRITE(ILK_DISPLAY_CHICKEN2
,
5074 I915_READ(ILK_DISPLAY_CHICKEN2
) |
5078 I915_WRITE(ILK_DSPCLK_GATE_D
, dspclk_gate
);
5080 I915_WRITE(ILK_DISPLAY_CHICKEN2
,
5081 I915_READ(ILK_DISPLAY_CHICKEN2
) |
5082 ILK_ELPIN_409_SELECT
);
5083 I915_WRITE(_3D_CHICKEN2
,
5084 _3D_CHICKEN2_WM_READ_PIPELINED
<< 16 |
5085 _3D_CHICKEN2_WM_READ_PIPELINED
);
5087 /* WaDisableRenderCachePipelinedFlush:ilk */
5088 I915_WRITE(CACHE_MODE_0
,
5089 _MASKED_BIT_ENABLE(CM0_PIPELINED_RENDER_FLUSH_DISABLE
));
5091 g4x_disable_trickle_feed(dev
);
5093 ibx_init_clock_gating(dev
);
5096 static void cpt_init_clock_gating(struct drm_device
*dev
)
5098 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
5103 * On Ibex Peak and Cougar Point, we need to disable clock
5104 * gating for the panel power sequencer or it will fail to
5105 * start up when no ports are active.
5107 I915_WRITE(SOUTH_DSPCLK_GATE_D
, PCH_DPLSUNIT_CLOCK_GATE_DISABLE
|
5108 PCH_DPLUNIT_CLOCK_GATE_DISABLE
|
5109 PCH_CPUNIT_CLOCK_GATE_DISABLE
);
5110 I915_WRITE(SOUTH_CHICKEN2
, I915_READ(SOUTH_CHICKEN2
) |
5111 DPLS_EDP_PPS_FIX_DIS
);
5112 /* The below fixes the weird display corruption, a few pixels shifted
5113 * downward, on (only) LVDS of some HP laptops with IVY.
5115 for_each_pipe(pipe
) {
5116 val
= I915_READ(TRANS_CHICKEN2(pipe
));
5117 val
|= TRANS_CHICKEN2_TIMING_OVERRIDE
;
5118 val
&= ~TRANS_CHICKEN2_FDI_POLARITY_REVERSED
;
5119 if (dev_priv
->vbt
.fdi_rx_polarity_inverted
)
5120 val
|= TRANS_CHICKEN2_FDI_POLARITY_REVERSED
;
5121 val
&= ~TRANS_CHICKEN2_FRAME_START_DELAY_MASK
;
5122 val
&= ~TRANS_CHICKEN2_DISABLE_DEEP_COLOR_COUNTER
;
5123 val
&= ~TRANS_CHICKEN2_DISABLE_DEEP_COLOR_MODESWITCH
;
5124 I915_WRITE(TRANS_CHICKEN2(pipe
), val
);
5126 /* WADP0ClockGatingDisable */
5127 for_each_pipe(pipe
) {
5128 I915_WRITE(TRANS_CHICKEN1(pipe
),
5129 TRANS_CHICKEN1_DP0UNIT_GC_DISABLE
);
5133 static void gen6_check_mch_setup(struct drm_device
*dev
)
5135 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
5138 tmp
= I915_READ(MCH_SSKPD
);
5139 if ((tmp
& MCH_SSKPD_WM0_MASK
) != MCH_SSKPD_WM0_VAL
) {
5140 DRM_INFO("Wrong MCH_SSKPD value: 0x%08x\n", tmp
);
5141 DRM_INFO("This can cause pipe underruns and display issues.\n");
5142 DRM_INFO("Please upgrade your BIOS to fix this.\n");
5146 static void gen6_init_clock_gating(struct drm_device
*dev
)
5148 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
5149 uint32_t dspclk_gate
= ILK_VRHUNIT_CLOCK_GATE_DISABLE
;
5151 I915_WRITE(ILK_DSPCLK_GATE_D
, dspclk_gate
);
5153 I915_WRITE(ILK_DISPLAY_CHICKEN2
,
5154 I915_READ(ILK_DISPLAY_CHICKEN2
) |
5155 ILK_ELPIN_409_SELECT
);
5157 /* WaDisableHiZPlanesWhenMSAAEnabled:snb */
5158 I915_WRITE(_3D_CHICKEN
,
5159 _MASKED_BIT_ENABLE(_3D_CHICKEN_HIZ_PLANE_DISABLE_MSAA_4X_SNB
));
5161 /* WaSetupGtModeTdRowDispatch:snb */
5162 if (IS_SNB_GT1(dev
))
5163 I915_WRITE(GEN6_GT_MODE
,
5164 _MASKED_BIT_ENABLE(GEN6_TD_FOUR_ROW_DISPATCH_DISABLE
));
5166 I915_WRITE(WM3_LP_ILK
, 0);
5167 I915_WRITE(WM2_LP_ILK
, 0);
5168 I915_WRITE(WM1_LP_ILK
, 0);
5170 I915_WRITE(CACHE_MODE_0
,
5171 _MASKED_BIT_DISABLE(CM0_STC_EVICT_DISABLE_LRA_SNB
));
5173 I915_WRITE(GEN6_UCGCTL1
,
5174 I915_READ(GEN6_UCGCTL1
) |
5175 GEN6_BLBUNIT_CLOCK_GATE_DISABLE
|
5176 GEN6_CSUNIT_CLOCK_GATE_DISABLE
);
5178 /* According to the BSpec vol1g, bit 12 (RCPBUNIT) clock
5179 * gating disable must be set. Failure to set it results in
5180 * flickering pixels due to Z write ordering failures after
5181 * some amount of runtime in the Mesa "fire" demo, and Unigine
5182 * Sanctuary and Tropics, and apparently anything else with
5183 * alpha test or pixel discard.
5185 * According to the spec, bit 11 (RCCUNIT) must also be set,
5186 * but we didn't debug actual testcases to find it out.
5188 * Also apply WaDisableVDSUnitClockGating:snb and
5189 * WaDisableRCPBUnitClockGating:snb.
5191 I915_WRITE(GEN6_UCGCTL2
,
5192 GEN7_VDSUNIT_CLOCK_GATE_DISABLE
|
5193 GEN6_RCPBUNIT_CLOCK_GATE_DISABLE
|
5194 GEN6_RCCUNIT_CLOCK_GATE_DISABLE
);
5196 /* Bspec says we need to always set all mask bits. */
5197 I915_WRITE(_3D_CHICKEN3
, (0xFFFF << 16) |
5198 _3D_CHICKEN3_SF_DISABLE_FASTCLIP_CULL
);
5201 * According to the spec the following bits should be
5202 * set in order to enable memory self-refresh and fbc:
5203 * The bit21 and bit22 of 0x42000
5204 * The bit21 and bit22 of 0x42004
5205 * The bit5 and bit7 of 0x42020
5206 * The bit14 of 0x70180
5207 * The bit14 of 0x71180
5209 * WaFbcAsynchFlipDisableFbcQueue:snb
5211 I915_WRITE(ILK_DISPLAY_CHICKEN1
,
5212 I915_READ(ILK_DISPLAY_CHICKEN1
) |
5213 ILK_FBCQ_DIS
| ILK_PABSTRETCH_DIS
);
5214 I915_WRITE(ILK_DISPLAY_CHICKEN2
,
5215 I915_READ(ILK_DISPLAY_CHICKEN2
) |
5216 ILK_DPARB_GATE
| ILK_VSDPFD_FULL
);
5217 I915_WRITE(ILK_DSPCLK_GATE_D
,
5218 I915_READ(ILK_DSPCLK_GATE_D
) |
5219 ILK_DPARBUNIT_CLOCK_GATE_ENABLE
|
5220 ILK_DPFDUNIT_CLOCK_GATE_ENABLE
);
5222 g4x_disable_trickle_feed(dev
);
5224 /* The default value should be 0x200 according to docs, but the two
5225 * platforms I checked have a 0 for this. (Maybe BIOS overrides?) */
5226 I915_WRITE(GEN6_GT_MODE
, _MASKED_BIT_DISABLE(0xffff));
5227 I915_WRITE(GEN6_GT_MODE
, _MASKED_BIT_ENABLE(GEN6_GT_MODE_HI
));
5229 cpt_init_clock_gating(dev
);
5231 gen6_check_mch_setup(dev
);
5234 static void gen7_setup_fixed_func_scheduler(struct drm_i915_private
*dev_priv
)
5236 uint32_t reg
= I915_READ(GEN7_FF_THREAD_MODE
);
5238 reg
&= ~GEN7_FF_SCHED_MASK
;
5239 reg
|= GEN7_FF_TS_SCHED_HW
;
5240 reg
|= GEN7_FF_VS_SCHED_HW
;
5241 reg
|= GEN7_FF_DS_SCHED_HW
;
5243 if (IS_HASWELL(dev_priv
->dev
))
5244 reg
&= ~GEN7_FF_VS_REF_CNT_FFME
;
5246 I915_WRITE(GEN7_FF_THREAD_MODE
, reg
);
5249 static void lpt_init_clock_gating(struct drm_device
*dev
)
5251 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
5254 * TODO: this bit should only be enabled when really needed, then
5255 * disabled when not needed anymore in order to save power.
5257 if (dev_priv
->pch_id
== INTEL_PCH_LPT_LP_DEVICE_ID_TYPE
)
5258 I915_WRITE(SOUTH_DSPCLK_GATE_D
,
5259 I915_READ(SOUTH_DSPCLK_GATE_D
) |
5260 PCH_LP_PARTITION_LEVEL_DISABLE
);
5262 /* WADPOClockGatingDisable:hsw */
5263 I915_WRITE(_TRANSA_CHICKEN1
,
5264 I915_READ(_TRANSA_CHICKEN1
) |
5265 TRANS_CHICKEN1_DP0UNIT_GC_DISABLE
);
5268 static void lpt_suspend_hw(struct drm_device
*dev
)
5270 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
5272 if (dev_priv
->pch_id
== INTEL_PCH_LPT_LP_DEVICE_ID_TYPE
) {
5273 uint32_t val
= I915_READ(SOUTH_DSPCLK_GATE_D
);
5275 val
&= ~PCH_LP_PARTITION_LEVEL_DISABLE
;
5276 I915_WRITE(SOUTH_DSPCLK_GATE_D
, val
);
5280 static void gen8_init_clock_gating(struct drm_device
*dev
)
5282 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
5285 I915_WRITE(WM3_LP_ILK
, 0);
5286 I915_WRITE(WM2_LP_ILK
, 0);
5287 I915_WRITE(WM1_LP_ILK
, 0);
5289 /* FIXME(BDW): Check all the w/a, some might only apply to
5290 * pre-production hw. */
5292 WARN(!i915_preliminary_hw_support
,
5293 "GEN8_CENTROID_PIXEL_OPT_DIS not be needed for production\n");
5294 I915_WRITE(HALF_SLICE_CHICKEN3
,
5295 _MASKED_BIT_ENABLE(GEN8_CENTROID_PIXEL_OPT_DIS
));
5296 I915_WRITE(HALF_SLICE_CHICKEN3
,
5297 _MASKED_BIT_ENABLE(GEN8_SAMPLER_POWER_BYPASS_DIS
));
5298 I915_WRITE(GAMTARBMODE
, _MASKED_BIT_ENABLE(ARB_MODE_BWGTLB_DISABLE
));
5300 I915_WRITE(_3D_CHICKEN3
,
5301 _3D_CHICKEN_SDE_LIMIT_FIFO_POLY_DEPTH(2));
5303 I915_WRITE(COMMON_SLICE_CHICKEN2
,
5304 _MASKED_BIT_ENABLE(GEN8_CSC2_SBE_VUE_CACHE_CONSERVATIVE
));
5306 I915_WRITE(GEN7_HALF_SLICE_CHICKEN1
,
5307 _MASKED_BIT_ENABLE(GEN7_SINGLE_SUBSCAN_DISPATCH_ENABLE
));
5309 /* WaSwitchSolVfFArbitrationPriority:bdw */
5310 I915_WRITE(GAM_ECOCHK
, I915_READ(GAM_ECOCHK
) | HSW_ECOCHK_ARB_PRIO_SOL
);
5312 /* WaPsrDPAMaskVBlankInSRD:bdw */
5313 I915_WRITE(CHICKEN_PAR1_1
,
5314 I915_READ(CHICKEN_PAR1_1
) | DPA_MASK_VBLANK_SRD
);
5316 /* WaPsrDPRSUnmaskVBlankInSRD:bdw */
5318 I915_WRITE(CHICKEN_PIPESL_1(i
),
5319 I915_READ(CHICKEN_PIPESL_1(i
) |
5320 DPRS_MASK_VBLANK_SRD
));
5323 /* Use Force Non-Coherent whenever executing a 3D context. This is a
5324 * workaround for for a possible hang in the unlikely event a TLB
5325 * invalidation occurs during a PSD flush.
5327 I915_WRITE(HDC_CHICKEN0
,
5328 I915_READ(HDC_CHICKEN0
) |
5329 _MASKED_BIT_ENABLE(HDC_FORCE_NON_COHERENT
));
5331 /* WaVSRefCountFullforceMissDisable:bdw */
5332 /* WaDSRefCountFullforceMissDisable:bdw */
5333 I915_WRITE(GEN7_FF_THREAD_MODE
,
5334 I915_READ(GEN7_FF_THREAD_MODE
) &
5335 ~(GEN8_FF_DS_REF_CNT_FFME
| GEN7_FF_VS_REF_CNT_FFME
));
5338 static void haswell_init_clock_gating(struct drm_device
*dev
)
5340 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
5342 I915_WRITE(WM3_LP_ILK
, 0);
5343 I915_WRITE(WM2_LP_ILK
, 0);
5344 I915_WRITE(WM1_LP_ILK
, 0);
5346 /* According to the spec, bit 13 (RCZUNIT) must be set on IVB.
5347 * This implements the WaDisableRCZUnitClockGating:hsw workaround.
5349 I915_WRITE(GEN6_UCGCTL2
, GEN6_RCZUNIT_CLOCK_GATE_DISABLE
);
5351 /* Apply the WaDisableRHWOOptimizationForRenderHang:hsw workaround. */
5352 I915_WRITE(GEN7_COMMON_SLICE_CHICKEN1
,
5353 GEN7_CSC1_RHWO_OPT_DISABLE_IN_RCC
);
5355 /* WaApplyL3ControlAndL3ChickenMode:hsw */
5356 I915_WRITE(GEN7_L3CNTLREG1
,
5357 GEN7_WA_FOR_GEN7_L3_CONTROL
);
5358 I915_WRITE(GEN7_L3_CHICKEN_MODE_REGISTER
,
5359 GEN7_WA_L3_CHICKEN_MODE
);
5361 /* L3 caching of data atomics doesn't work -- disable it. */
5362 I915_WRITE(HSW_SCRATCH1
, HSW_SCRATCH1_L3_DATA_ATOMICS_DISABLE
);
5363 I915_WRITE(HSW_ROW_CHICKEN3
,
5364 _MASKED_BIT_ENABLE(HSW_ROW_CHICKEN3_L3_GLOBAL_ATOMICS_DISABLE
));
5366 /* This is required by WaCatErrorRejectionIssue:hsw */
5367 I915_WRITE(GEN7_SQ_CHICKEN_MBCUNIT_CONFIG
,
5368 I915_READ(GEN7_SQ_CHICKEN_MBCUNIT_CONFIG
) |
5369 GEN7_SQ_CHICKEN_MBCUNIT_SQINTMOB
);
5371 /* WaVSRefCountFullforceMissDisable:hsw */
5372 gen7_setup_fixed_func_scheduler(dev_priv
);
5374 /* WaDisable4x2SubspanOptimization:hsw */
5375 I915_WRITE(CACHE_MODE_1
,
5376 _MASKED_BIT_ENABLE(PIXEL_SUBSPAN_COLLECT_OPT_DISABLE
));
5378 /* WaSwitchSolVfFArbitrationPriority:hsw */
5379 I915_WRITE(GAM_ECOCHK
, I915_READ(GAM_ECOCHK
) | HSW_ECOCHK_ARB_PRIO_SOL
);
5381 /* WaRsPkgCStateDisplayPMReq:hsw */
5382 I915_WRITE(CHICKEN_PAR1_1
,
5383 I915_READ(CHICKEN_PAR1_1
) | FORCE_ARB_IDLE_PLANES
);
5385 lpt_init_clock_gating(dev
);
5388 static void ivybridge_init_clock_gating(struct drm_device
*dev
)
5390 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
5393 I915_WRITE(WM3_LP_ILK
, 0);
5394 I915_WRITE(WM2_LP_ILK
, 0);
5395 I915_WRITE(WM1_LP_ILK
, 0);
5397 I915_WRITE(ILK_DSPCLK_GATE_D
, ILK_VRHUNIT_CLOCK_GATE_DISABLE
);
5399 /* WaDisableEarlyCull:ivb */
5400 I915_WRITE(_3D_CHICKEN3
,
5401 _MASKED_BIT_ENABLE(_3D_CHICKEN_SF_DISABLE_OBJEND_CULL
));
5403 /* WaDisableBackToBackFlipFix:ivb */
5404 I915_WRITE(IVB_CHICKEN3
,
5405 CHICKEN3_DGMG_REQ_OUT_FIX_DISABLE
|
5406 CHICKEN3_DGMG_DONE_FIX_DISABLE
);
5408 /* WaDisablePSDDualDispatchEnable:ivb */
5409 if (IS_IVB_GT1(dev
))
5410 I915_WRITE(GEN7_HALF_SLICE_CHICKEN1
,
5411 _MASKED_BIT_ENABLE(GEN7_PSD_SINGLE_PORT_DISPATCH_ENABLE
));
5413 I915_WRITE(GEN7_HALF_SLICE_CHICKEN1_GT2
,
5414 _MASKED_BIT_ENABLE(GEN7_PSD_SINGLE_PORT_DISPATCH_ENABLE
));
5416 /* Apply the WaDisableRHWOOptimizationForRenderHang:ivb workaround. */
5417 I915_WRITE(GEN7_COMMON_SLICE_CHICKEN1
,
5418 GEN7_CSC1_RHWO_OPT_DISABLE_IN_RCC
);
5420 /* WaApplyL3ControlAndL3ChickenMode:ivb */
5421 I915_WRITE(GEN7_L3CNTLREG1
,
5422 GEN7_WA_FOR_GEN7_L3_CONTROL
);
5423 I915_WRITE(GEN7_L3_CHICKEN_MODE_REGISTER
,
5424 GEN7_WA_L3_CHICKEN_MODE
);
5425 if (IS_IVB_GT1(dev
))
5426 I915_WRITE(GEN7_ROW_CHICKEN2
,
5427 _MASKED_BIT_ENABLE(DOP_CLOCK_GATING_DISABLE
));
5429 I915_WRITE(GEN7_ROW_CHICKEN2_GT2
,
5430 _MASKED_BIT_ENABLE(DOP_CLOCK_GATING_DISABLE
));
5433 /* WaForceL3Serialization:ivb */
5434 I915_WRITE(GEN7_L3SQCREG4
, I915_READ(GEN7_L3SQCREG4
) &
5435 ~L3SQ_URB_READ_CAM_MATCH_DISABLE
);
5437 /* According to the BSpec vol1g, bit 12 (RCPBUNIT) clock
5438 * gating disable must be set. Failure to set it results in
5439 * flickering pixels due to Z write ordering failures after
5440 * some amount of runtime in the Mesa "fire" demo, and Unigine
5441 * Sanctuary and Tropics, and apparently anything else with
5442 * alpha test or pixel discard.
5444 * According to the spec, bit 11 (RCCUNIT) must also be set,
5445 * but we didn't debug actual testcases to find it out.
5447 * According to the spec, bit 13 (RCZUNIT) must be set on IVB.
5448 * This implements the WaDisableRCZUnitClockGating:ivb workaround.
5450 I915_WRITE(GEN6_UCGCTL2
,
5451 GEN6_RCZUNIT_CLOCK_GATE_DISABLE
|
5452 GEN6_RCCUNIT_CLOCK_GATE_DISABLE
);
5454 /* This is required by WaCatErrorRejectionIssue:ivb */
5455 I915_WRITE(GEN7_SQ_CHICKEN_MBCUNIT_CONFIG
,
5456 I915_READ(GEN7_SQ_CHICKEN_MBCUNIT_CONFIG
) |
5457 GEN7_SQ_CHICKEN_MBCUNIT_SQINTMOB
);
5459 g4x_disable_trickle_feed(dev
);
5461 /* WaVSRefCountFullforceMissDisable:ivb */
5462 gen7_setup_fixed_func_scheduler(dev_priv
);
5464 /* WaDisable4x2SubspanOptimization:ivb */
5465 I915_WRITE(CACHE_MODE_1
,
5466 _MASKED_BIT_ENABLE(PIXEL_SUBSPAN_COLLECT_OPT_DISABLE
));
5468 snpcr
= I915_READ(GEN6_MBCUNIT_SNPCR
);
5469 snpcr
&= ~GEN6_MBC_SNPCR_MASK
;
5470 snpcr
|= GEN6_MBC_SNPCR_MED
;
5471 I915_WRITE(GEN6_MBCUNIT_SNPCR
, snpcr
);
5473 if (!HAS_PCH_NOP(dev
))
5474 cpt_init_clock_gating(dev
);
5476 gen6_check_mch_setup(dev
);
5479 static void valleyview_init_clock_gating(struct drm_device
*dev
)
5481 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
5484 mutex_lock(&dev_priv
->rps
.hw_lock
);
5485 val
= vlv_punit_read(dev_priv
, PUNIT_REG_GPU_FREQ_STS
);
5486 mutex_unlock(&dev_priv
->rps
.hw_lock
);
5487 switch ((val
>> 6) & 3) {
5489 dev_priv
->mem_freq
= 800;
5492 dev_priv
->mem_freq
= 1066;
5495 dev_priv
->mem_freq
= 1333;
5498 dev_priv
->mem_freq
= 1333;
5501 DRM_DEBUG_DRIVER("DDR speed: %d MHz", dev_priv
->mem_freq
);
5503 I915_WRITE(DSPCLK_GATE_D
, VRHUNIT_CLOCK_GATE_DISABLE
);
5505 /* WaDisableEarlyCull:vlv */
5506 I915_WRITE(_3D_CHICKEN3
,
5507 _MASKED_BIT_ENABLE(_3D_CHICKEN_SF_DISABLE_OBJEND_CULL
));
5509 /* WaDisableBackToBackFlipFix:vlv */
5510 I915_WRITE(IVB_CHICKEN3
,
5511 CHICKEN3_DGMG_REQ_OUT_FIX_DISABLE
|
5512 CHICKEN3_DGMG_DONE_FIX_DISABLE
);
5514 /* WaDisablePSDDualDispatchEnable:vlv */
5515 I915_WRITE(GEN7_HALF_SLICE_CHICKEN1
,
5516 _MASKED_BIT_ENABLE(GEN7_MAX_PS_THREAD_DEP
|
5517 GEN7_PSD_SINGLE_PORT_DISPATCH_ENABLE
));
5519 /* Apply the WaDisableRHWOOptimizationForRenderHang:vlv workaround. */
5520 I915_WRITE(GEN7_COMMON_SLICE_CHICKEN1
,
5521 GEN7_CSC1_RHWO_OPT_DISABLE_IN_RCC
);
5523 /* WaApplyL3ControlAndL3ChickenMode:vlv */
5524 I915_WRITE(GEN7_L3CNTLREG1
, I915_READ(GEN7_L3CNTLREG1
) | GEN7_L3AGDIS
);
5525 I915_WRITE(GEN7_L3_CHICKEN_MODE_REGISTER
, GEN7_WA_L3_CHICKEN_MODE
);
5527 /* WaForceL3Serialization:vlv */
5528 I915_WRITE(GEN7_L3SQCREG4
, I915_READ(GEN7_L3SQCREG4
) &
5529 ~L3SQ_URB_READ_CAM_MATCH_DISABLE
);
5531 /* WaDisableDopClockGating:vlv */
5532 I915_WRITE(GEN7_ROW_CHICKEN2
,
5533 _MASKED_BIT_ENABLE(DOP_CLOCK_GATING_DISABLE
));
5535 /* This is required by WaCatErrorRejectionIssue:vlv */
5536 I915_WRITE(GEN7_SQ_CHICKEN_MBCUNIT_CONFIG
,
5537 I915_READ(GEN7_SQ_CHICKEN_MBCUNIT_CONFIG
) |
5538 GEN7_SQ_CHICKEN_MBCUNIT_SQINTMOB
);
5540 /* According to the BSpec vol1g, bit 12 (RCPBUNIT) clock
5541 * gating disable must be set. Failure to set it results in
5542 * flickering pixels due to Z write ordering failures after
5543 * some amount of runtime in the Mesa "fire" demo, and Unigine
5544 * Sanctuary and Tropics, and apparently anything else with
5545 * alpha test or pixel discard.
5547 * According to the spec, bit 11 (RCCUNIT) must also be set,
5548 * but we didn't debug actual testcases to find it out.
5550 * According to the spec, bit 13 (RCZUNIT) must be set on IVB.
5551 * This implements the WaDisableRCZUnitClockGating:vlv workaround.
5553 * Also apply WaDisableVDSUnitClockGating:vlv and
5554 * WaDisableRCPBUnitClockGating:vlv.
5556 I915_WRITE(GEN6_UCGCTL2
,
5557 GEN7_VDSUNIT_CLOCK_GATE_DISABLE
|
5558 GEN7_TDLUNIT_CLOCK_GATE_DISABLE
|
5559 GEN6_RCZUNIT_CLOCK_GATE_DISABLE
|
5560 GEN6_RCPBUNIT_CLOCK_GATE_DISABLE
|
5561 GEN6_RCCUNIT_CLOCK_GATE_DISABLE
);
5563 I915_WRITE(GEN7_UCGCTL4
, GEN7_L3BANK2X_CLOCK_GATE_DISABLE
);
5565 I915_WRITE(MI_ARB_VLV
, MI_ARB_DISPLAY_TRICKLE_FEED_DISABLE
);
5567 I915_WRITE(CACHE_MODE_1
,
5568 _MASKED_BIT_ENABLE(PIXEL_SUBSPAN_COLLECT_OPT_DISABLE
));
5571 * WaDisableVLVClockGating_VBIIssue:vlv
5572 * Disable clock gating on th GCFG unit to prevent a delay
5573 * in the reporting of vblank events.
5575 I915_WRITE(VLV_GUNIT_CLOCK_GATE
, 0xffffffff);
5577 /* Conservative clock gating settings for now */
5578 I915_WRITE(0x9400, 0xffffffff);
5579 I915_WRITE(0x9404, 0xffffffff);
5580 I915_WRITE(0x9408, 0xffffffff);
5581 I915_WRITE(0x940c, 0xffffffff);
5582 I915_WRITE(0x9410, 0xffffffff);
5583 I915_WRITE(0x9414, 0xffffffff);
5584 I915_WRITE(0x9418, 0xffffffff);
5587 static void g4x_init_clock_gating(struct drm_device
*dev
)
5589 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
5590 uint32_t dspclk_gate
;
5592 I915_WRITE(RENCLK_GATE_D1
, 0);
5593 I915_WRITE(RENCLK_GATE_D2
, VF_UNIT_CLOCK_GATE_DISABLE
|
5594 GS_UNIT_CLOCK_GATE_DISABLE
|
5595 CL_UNIT_CLOCK_GATE_DISABLE
);
5596 I915_WRITE(RAMCLK_GATE_D
, 0);
5597 dspclk_gate
= VRHUNIT_CLOCK_GATE_DISABLE
|
5598 OVRUNIT_CLOCK_GATE_DISABLE
|
5599 OVCUNIT_CLOCK_GATE_DISABLE
;
5601 dspclk_gate
|= DSSUNIT_CLOCK_GATE_DISABLE
;
5602 I915_WRITE(DSPCLK_GATE_D
, dspclk_gate
);
5604 /* WaDisableRenderCachePipelinedFlush */
5605 I915_WRITE(CACHE_MODE_0
,
5606 _MASKED_BIT_ENABLE(CM0_PIPELINED_RENDER_FLUSH_DISABLE
));
5608 g4x_disable_trickle_feed(dev
);
5611 static void crestline_init_clock_gating(struct drm_device
*dev
)
5613 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
5615 I915_WRITE(RENCLK_GATE_D1
, I965_RCC_CLOCK_GATE_DISABLE
);
5616 I915_WRITE(RENCLK_GATE_D2
, 0);
5617 I915_WRITE(DSPCLK_GATE_D
, 0);
5618 I915_WRITE(RAMCLK_GATE_D
, 0);
5619 I915_WRITE16(DEUC
, 0);
5620 I915_WRITE(MI_ARB_STATE
,
5621 _MASKED_BIT_ENABLE(MI_ARB_DISPLAY_TRICKLE_FEED_DISABLE
));
5624 static void broadwater_init_clock_gating(struct drm_device
*dev
)
5626 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
5628 I915_WRITE(RENCLK_GATE_D1
, I965_RCZ_CLOCK_GATE_DISABLE
|
5629 I965_RCC_CLOCK_GATE_DISABLE
|
5630 I965_RCPB_CLOCK_GATE_DISABLE
|
5631 I965_ISC_CLOCK_GATE_DISABLE
|
5632 I965_FBC_CLOCK_GATE_DISABLE
);
5633 I915_WRITE(RENCLK_GATE_D2
, 0);
5634 I915_WRITE(MI_ARB_STATE
,
5635 _MASKED_BIT_ENABLE(MI_ARB_DISPLAY_TRICKLE_FEED_DISABLE
));
5638 static void gen3_init_clock_gating(struct drm_device
*dev
)
5640 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
5641 u32 dstate
= I915_READ(D_STATE
);
5643 dstate
|= DSTATE_PLL_D3_OFF
| DSTATE_GFX_CLOCK_GATING
|
5644 DSTATE_DOT_CLOCK_GATING
;
5645 I915_WRITE(D_STATE
, dstate
);
5647 if (IS_PINEVIEW(dev
))
5648 I915_WRITE(ECOSKPD
, _MASKED_BIT_ENABLE(ECO_GATING_CX_ONLY
));
5650 /* IIR "flip pending" means done if this bit is set */
5651 I915_WRITE(ECOSKPD
, _MASKED_BIT_DISABLE(ECO_FLIP_DONE
));
5654 static void i85x_init_clock_gating(struct drm_device
*dev
)
5656 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
5658 I915_WRITE(RENCLK_GATE_D1
, SV_CLOCK_GATE_DISABLE
);
5661 static void i830_init_clock_gating(struct drm_device
*dev
)
5663 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
5665 I915_WRITE(DSPCLK_GATE_D
, OVRUNIT_CLOCK_GATE_DISABLE
);
5668 void intel_init_clock_gating(struct drm_device
*dev
)
5670 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
5672 dev_priv
->display
.init_clock_gating(dev
);
5675 void intel_suspend_hw(struct drm_device
*dev
)
5677 if (HAS_PCH_LPT(dev
))
5678 lpt_suspend_hw(dev
);
5681 #define for_each_power_well(i, power_well, domain_mask, power_domains) \
5683 i < (power_domains)->power_well_count && \
5684 ((power_well) = &(power_domains)->power_wells[i]); \
5686 if ((power_well)->domains & (domain_mask))
5688 #define for_each_power_well_rev(i, power_well, domain_mask, power_domains) \
5689 for (i = (power_domains)->power_well_count - 1; \
5690 i >= 0 && ((power_well) = &(power_domains)->power_wells[i]);\
5692 if ((power_well)->domains & (domain_mask))
5695 * We should only use the power well if we explicitly asked the hardware to
5696 * enable it, so check if it's enabled and also check if we've requested it to
5699 static bool hsw_power_well_enabled(struct drm_device
*dev
,
5700 struct i915_power_well
*power_well
)
5702 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
5704 return I915_READ(HSW_PWR_WELL_DRIVER
) ==
5705 (HSW_PWR_WELL_ENABLE_REQUEST
| HSW_PWR_WELL_STATE_ENABLED
);
5708 bool intel_display_power_enabled_sw(struct drm_device
*dev
,
5709 enum intel_display_power_domain domain
)
5711 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
5712 struct i915_power_domains
*power_domains
;
5714 power_domains
= &dev_priv
->power_domains
;
5716 return power_domains
->domain_use_count
[domain
];
5719 bool intel_display_power_enabled(struct drm_device
*dev
,
5720 enum intel_display_power_domain domain
)
5722 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
5723 struct i915_power_domains
*power_domains
;
5724 struct i915_power_well
*power_well
;
5728 power_domains
= &dev_priv
->power_domains
;
5732 mutex_lock(&power_domains
->lock
);
5733 for_each_power_well_rev(i
, power_well
, BIT(domain
), power_domains
) {
5734 if (power_well
->always_on
)
5737 if (!power_well
->is_enabled(dev
, power_well
)) {
5742 mutex_unlock(&power_domains
->lock
);
5747 static void hsw_power_well_post_enable(struct drm_i915_private
*dev_priv
)
5749 struct drm_device
*dev
= dev_priv
->dev
;
5750 unsigned long irqflags
;
5753 * After we re-enable the power well, if we touch VGA register 0x3d5
5754 * we'll get unclaimed register interrupts. This stops after we write
5755 * anything to the VGA MSR register. The vgacon module uses this
5756 * register all the time, so if we unbind our driver and, as a
5757 * consequence, bind vgacon, we'll get stuck in an infinite loop at
5758 * console_unlock(). So make here we touch the VGA MSR register, making
5759 * sure vgacon can keep working normally without triggering interrupts
5760 * and error messages.
5762 vga_get_uninterruptible(dev
->pdev
, VGA_RSRC_LEGACY_IO
);
5763 outb(inb(VGA_MSR_READ
), VGA_MSR_WRITE
);
5764 vga_put(dev
->pdev
, VGA_RSRC_LEGACY_IO
);
5766 if (IS_BROADWELL(dev
)) {
5767 spin_lock_irqsave(&dev_priv
->irq_lock
, irqflags
);
5768 I915_WRITE(GEN8_DE_PIPE_IMR(PIPE_B
),
5769 dev_priv
->de_irq_mask
[PIPE_B
]);
5770 I915_WRITE(GEN8_DE_PIPE_IER(PIPE_B
),
5771 ~dev_priv
->de_irq_mask
[PIPE_B
] |
5773 I915_WRITE(GEN8_DE_PIPE_IMR(PIPE_C
),
5774 dev_priv
->de_irq_mask
[PIPE_C
]);
5775 I915_WRITE(GEN8_DE_PIPE_IER(PIPE_C
),
5776 ~dev_priv
->de_irq_mask
[PIPE_C
] |
5778 POSTING_READ(GEN8_DE_PIPE_IER(PIPE_C
));
5779 spin_unlock_irqrestore(&dev_priv
->irq_lock
, irqflags
);
5783 static void hsw_power_well_post_disable(struct drm_i915_private
*dev_priv
)
5785 struct drm_device
*dev
= dev_priv
->dev
;
5787 unsigned long irqflags
;
5790 * After this, the registers on the pipes that are part of the power
5791 * well will become zero, so we have to adjust our counters according to
5794 * FIXME: Should we do this in general in drm_vblank_post_modeset?
5796 spin_lock_irqsave(&dev
->vbl_lock
, irqflags
);
5799 dev
->vblank
[p
].last
= 0;
5800 spin_unlock_irqrestore(&dev
->vbl_lock
, irqflags
);
5803 static void hsw_set_power_well(struct drm_device
*dev
,
5804 struct i915_power_well
*power_well
, bool enable
)
5806 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
5807 bool is_enabled
, enable_requested
;
5810 WARN_ON(dev_priv
->pc8
.enabled
);
5812 tmp
= I915_READ(HSW_PWR_WELL_DRIVER
);
5813 is_enabled
= tmp
& HSW_PWR_WELL_STATE_ENABLED
;
5814 enable_requested
= tmp
& HSW_PWR_WELL_ENABLE_REQUEST
;
5817 if (!enable_requested
)
5818 I915_WRITE(HSW_PWR_WELL_DRIVER
,
5819 HSW_PWR_WELL_ENABLE_REQUEST
);
5822 DRM_DEBUG_KMS("Enabling power well\n");
5823 if (wait_for((I915_READ(HSW_PWR_WELL_DRIVER
) &
5824 HSW_PWR_WELL_STATE_ENABLED
), 20))
5825 DRM_ERROR("Timeout enabling power well\n");
5828 hsw_power_well_post_enable(dev_priv
);
5830 if (enable_requested
) {
5831 I915_WRITE(HSW_PWR_WELL_DRIVER
, 0);
5832 POSTING_READ(HSW_PWR_WELL_DRIVER
);
5833 DRM_DEBUG_KMS("Requesting to disable the power well\n");
5835 hsw_power_well_post_disable(dev_priv
);
5840 static void __intel_power_well_get(struct drm_device
*dev
,
5841 struct i915_power_well
*power_well
)
5843 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
5845 if (!power_well
->count
++ && power_well
->set
) {
5846 hsw_disable_package_c8(dev_priv
);
5847 power_well
->set(dev
, power_well
, true);
5851 static void __intel_power_well_put(struct drm_device
*dev
,
5852 struct i915_power_well
*power_well
)
5854 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
5856 WARN_ON(!power_well
->count
);
5858 if (!--power_well
->count
&& power_well
->set
&&
5859 i915_disable_power_well
) {
5860 power_well
->set(dev
, power_well
, false);
5861 hsw_enable_package_c8(dev_priv
);
5865 void intel_display_power_get(struct drm_device
*dev
,
5866 enum intel_display_power_domain domain
)
5868 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
5869 struct i915_power_domains
*power_domains
;
5870 struct i915_power_well
*power_well
;
5873 power_domains
= &dev_priv
->power_domains
;
5875 mutex_lock(&power_domains
->lock
);
5877 for_each_power_well(i
, power_well
, BIT(domain
), power_domains
)
5878 __intel_power_well_get(dev
, power_well
);
5880 power_domains
->domain_use_count
[domain
]++;
5882 mutex_unlock(&power_domains
->lock
);
5885 void intel_display_power_put(struct drm_device
*dev
,
5886 enum intel_display_power_domain domain
)
5888 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
5889 struct i915_power_domains
*power_domains
;
5890 struct i915_power_well
*power_well
;
5893 power_domains
= &dev_priv
->power_domains
;
5895 mutex_lock(&power_domains
->lock
);
5897 WARN_ON(!power_domains
->domain_use_count
[domain
]);
5898 power_domains
->domain_use_count
[domain
]--;
5900 for_each_power_well_rev(i
, power_well
, BIT(domain
), power_domains
)
5901 __intel_power_well_put(dev
, power_well
);
5903 mutex_unlock(&power_domains
->lock
);
5906 static struct i915_power_domains
*hsw_pwr
;
5908 /* Display audio driver power well request */
5909 void i915_request_power_well(void)
5911 struct drm_i915_private
*dev_priv
;
5913 if (WARN_ON(!hsw_pwr
))
5916 dev_priv
= container_of(hsw_pwr
, struct drm_i915_private
,
5918 intel_display_power_get(dev_priv
->dev
, POWER_DOMAIN_AUDIO
);
5920 EXPORT_SYMBOL_GPL(i915_request_power_well
);
5922 /* Display audio driver power well release */
5923 void i915_release_power_well(void)
5925 struct drm_i915_private
*dev_priv
;
5927 if (WARN_ON(!hsw_pwr
))
5930 dev_priv
= container_of(hsw_pwr
, struct drm_i915_private
,
5932 intel_display_power_put(dev_priv
->dev
, POWER_DOMAIN_AUDIO
);
5934 EXPORT_SYMBOL_GPL(i915_release_power_well
);
5936 static struct i915_power_well i9xx_always_on_power_well
[] = {
5938 .name
= "always-on",
5940 .domains
= POWER_DOMAIN_MASK
,
5944 static struct i915_power_well hsw_power_wells
[] = {
5946 .name
= "always-on",
5948 .domains
= HSW_ALWAYS_ON_POWER_DOMAINS
,
5952 .domains
= POWER_DOMAIN_MASK
& ~HSW_ALWAYS_ON_POWER_DOMAINS
,
5953 .is_enabled
= hsw_power_well_enabled
,
5954 .set
= hsw_set_power_well
,
5958 static struct i915_power_well bdw_power_wells
[] = {
5960 .name
= "always-on",
5962 .domains
= BDW_ALWAYS_ON_POWER_DOMAINS
,
5966 .domains
= POWER_DOMAIN_MASK
& ~BDW_ALWAYS_ON_POWER_DOMAINS
,
5967 .is_enabled
= hsw_power_well_enabled
,
5968 .set
= hsw_set_power_well
,
5972 #define set_power_wells(power_domains, __power_wells) ({ \
5973 (power_domains)->power_wells = (__power_wells); \
5974 (power_domains)->power_well_count = ARRAY_SIZE(__power_wells); \
5977 int intel_power_domains_init(struct drm_device
*dev
)
5979 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
5980 struct i915_power_domains
*power_domains
= &dev_priv
->power_domains
;
5982 mutex_init(&power_domains
->lock
);
5985 * The enabling order will be from lower to higher indexed wells,
5986 * the disabling order is reversed.
5988 if (IS_HASWELL(dev
)) {
5989 set_power_wells(power_domains
, hsw_power_wells
);
5990 hsw_pwr
= power_domains
;
5991 } else if (IS_BROADWELL(dev
)) {
5992 set_power_wells(power_domains
, bdw_power_wells
);
5993 hsw_pwr
= power_domains
;
5995 set_power_wells(power_domains
, i9xx_always_on_power_well
);
6001 void intel_power_domains_remove(struct drm_device
*dev
)
6006 static void intel_power_domains_resume(struct drm_device
*dev
)
6008 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
6009 struct i915_power_domains
*power_domains
= &dev_priv
->power_domains
;
6010 struct i915_power_well
*power_well
;
6013 mutex_lock(&power_domains
->lock
);
6014 for_each_power_well(i
, power_well
, POWER_DOMAIN_MASK
, power_domains
) {
6015 if (power_well
->set
)
6016 power_well
->set(dev
, power_well
, power_well
->count
> 0);
6018 mutex_unlock(&power_domains
->lock
);
6022 * Starting with Haswell, we have a "Power Down Well" that can be turned off
6023 * when not needed anymore. We have 4 registers that can request the power well
6024 * to be enabled, and it will only be disabled if none of the registers is
6025 * requesting it to be enabled.
6027 void intel_power_domains_init_hw(struct drm_device
*dev
)
6029 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
6031 /* For now, we need the power well to be always enabled. */
6032 intel_display_set_init_power(dev
, true);
6033 intel_power_domains_resume(dev
);
6035 if (!(IS_HASWELL(dev
) || IS_BROADWELL(dev
)))
6038 /* We're taking over the BIOS, so clear any requests made by it since
6039 * the driver is in charge now. */
6040 if (I915_READ(HSW_PWR_WELL_BIOS
) & HSW_PWR_WELL_ENABLE_REQUEST
)
6041 I915_WRITE(HSW_PWR_WELL_BIOS
, 0);
6044 /* Disables PC8 so we can use the GMBUS and DP AUX interrupts. */
6045 void intel_aux_display_runtime_get(struct drm_i915_private
*dev_priv
)
6047 hsw_disable_package_c8(dev_priv
);
6050 void intel_aux_display_runtime_put(struct drm_i915_private
*dev_priv
)
6052 hsw_enable_package_c8(dev_priv
);
6055 void intel_runtime_pm_get(struct drm_i915_private
*dev_priv
)
6057 struct drm_device
*dev
= dev_priv
->dev
;
6058 struct device
*device
= &dev
->pdev
->dev
;
6060 if (!HAS_RUNTIME_PM(dev
))
6063 pm_runtime_get_sync(device
);
6064 WARN(dev_priv
->pm
.suspended
, "Device still suspended.\n");
6067 void intel_runtime_pm_put(struct drm_i915_private
*dev_priv
)
6069 struct drm_device
*dev
= dev_priv
->dev
;
6070 struct device
*device
= &dev
->pdev
->dev
;
6072 if (!HAS_RUNTIME_PM(dev
))
6075 pm_runtime_mark_last_busy(device
);
6076 pm_runtime_put_autosuspend(device
);
6079 void intel_init_runtime_pm(struct drm_i915_private
*dev_priv
)
6081 struct drm_device
*dev
= dev_priv
->dev
;
6082 struct device
*device
= &dev
->pdev
->dev
;
6084 dev_priv
->pm
.suspended
= false;
6086 if (!HAS_RUNTIME_PM(dev
))
6089 pm_runtime_set_active(device
);
6091 pm_runtime_set_autosuspend_delay(device
, 10000); /* 10s */
6092 pm_runtime_mark_last_busy(device
);
6093 pm_runtime_use_autosuspend(device
);
6096 void intel_fini_runtime_pm(struct drm_i915_private
*dev_priv
)
6098 struct drm_device
*dev
= dev_priv
->dev
;
6099 struct device
*device
= &dev
->pdev
->dev
;
6101 if (!HAS_RUNTIME_PM(dev
))
6104 /* Make sure we're not suspended first. */
6105 pm_runtime_get_sync(device
);
6106 pm_runtime_disable(device
);
6109 /* Set up chip specific power management-related functions */
6110 void intel_init_pm(struct drm_device
*dev
)
6112 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
6114 if (I915_HAS_FBC(dev
)) {
6115 if (INTEL_INFO(dev
)->gen
>= 7) {
6116 dev_priv
->display
.fbc_enabled
= ironlake_fbc_enabled
;
6117 dev_priv
->display
.enable_fbc
= gen7_enable_fbc
;
6118 dev_priv
->display
.disable_fbc
= ironlake_disable_fbc
;
6119 } else if (INTEL_INFO(dev
)->gen
>= 5) {
6120 dev_priv
->display
.fbc_enabled
= ironlake_fbc_enabled
;
6121 dev_priv
->display
.enable_fbc
= ironlake_enable_fbc
;
6122 dev_priv
->display
.disable_fbc
= ironlake_disable_fbc
;
6123 } else if (IS_GM45(dev
)) {
6124 dev_priv
->display
.fbc_enabled
= g4x_fbc_enabled
;
6125 dev_priv
->display
.enable_fbc
= g4x_enable_fbc
;
6126 dev_priv
->display
.disable_fbc
= g4x_disable_fbc
;
6128 dev_priv
->display
.fbc_enabled
= i8xx_fbc_enabled
;
6129 dev_priv
->display
.enable_fbc
= i8xx_enable_fbc
;
6130 dev_priv
->display
.disable_fbc
= i8xx_disable_fbc
;
6132 /* This value was pulled out of someone's hat */
6133 I915_WRITE(FBC_CONTROL
, 500 << FBC_CTL_INTERVAL_SHIFT
);
6138 if (IS_PINEVIEW(dev
))
6139 i915_pineview_get_mem_freq(dev
);
6140 else if (IS_GEN5(dev
))
6141 i915_ironlake_get_mem_freq(dev
);
6143 /* For FIFO watermark updates */
6144 if (HAS_PCH_SPLIT(dev
)) {
6145 intel_setup_wm_latency(dev
);
6148 if (dev_priv
->wm
.pri_latency
[1] &&
6149 dev_priv
->wm
.spr_latency
[1] &&
6150 dev_priv
->wm
.cur_latency
[1])
6151 dev_priv
->display
.update_wm
= ironlake_update_wm
;
6153 DRM_DEBUG_KMS("Failed to get proper latency. "
6155 dev_priv
->display
.update_wm
= NULL
;
6157 dev_priv
->display
.init_clock_gating
= ironlake_init_clock_gating
;
6158 } else if (IS_GEN6(dev
)) {
6159 if (dev_priv
->wm
.pri_latency
[0] &&
6160 dev_priv
->wm
.spr_latency
[0] &&
6161 dev_priv
->wm
.cur_latency
[0]) {
6162 dev_priv
->display
.update_wm
= sandybridge_update_wm
;
6163 dev_priv
->display
.update_sprite_wm
= sandybridge_update_sprite_wm
;
6165 DRM_DEBUG_KMS("Failed to read display plane latency. "
6167 dev_priv
->display
.update_wm
= NULL
;
6169 dev_priv
->display
.init_clock_gating
= gen6_init_clock_gating
;
6170 } else if (IS_IVYBRIDGE(dev
)) {
6171 if (dev_priv
->wm
.pri_latency
[0] &&
6172 dev_priv
->wm
.spr_latency
[0] &&
6173 dev_priv
->wm
.cur_latency
[0]) {
6174 dev_priv
->display
.update_wm
= ivybridge_update_wm
;
6175 dev_priv
->display
.update_sprite_wm
= sandybridge_update_sprite_wm
;
6177 DRM_DEBUG_KMS("Failed to read display plane latency. "
6179 dev_priv
->display
.update_wm
= NULL
;
6181 dev_priv
->display
.init_clock_gating
= ivybridge_init_clock_gating
;
6182 } else if (IS_HASWELL(dev
)) {
6183 if (dev_priv
->wm
.pri_latency
[0] &&
6184 dev_priv
->wm
.spr_latency
[0] &&
6185 dev_priv
->wm
.cur_latency
[0]) {
6186 dev_priv
->display
.update_wm
= haswell_update_wm
;
6187 dev_priv
->display
.update_sprite_wm
=
6188 haswell_update_sprite_wm
;
6190 DRM_DEBUG_KMS("Failed to read display plane latency. "
6192 dev_priv
->display
.update_wm
= NULL
;
6194 dev_priv
->display
.init_clock_gating
= haswell_init_clock_gating
;
6195 } else if (INTEL_INFO(dev
)->gen
== 8) {
6196 dev_priv
->display
.init_clock_gating
= gen8_init_clock_gating
;
6198 dev_priv
->display
.update_wm
= NULL
;
6199 } else if (IS_VALLEYVIEW(dev
)) {
6200 dev_priv
->display
.update_wm
= valleyview_update_wm
;
6201 dev_priv
->display
.init_clock_gating
=
6202 valleyview_init_clock_gating
;
6203 } else if (IS_PINEVIEW(dev
)) {
6204 if (!intel_get_cxsr_latency(IS_PINEVIEW_G(dev
),
6207 dev_priv
->mem_freq
)) {
6208 DRM_INFO("failed to find known CxSR latency "
6209 "(found ddr%s fsb freq %d, mem freq %d), "
6211 (dev_priv
->is_ddr3
== 1) ? "3" : "2",
6212 dev_priv
->fsb_freq
, dev_priv
->mem_freq
);
6213 /* Disable CxSR and never update its watermark again */
6214 pineview_disable_cxsr(dev
);
6215 dev_priv
->display
.update_wm
= NULL
;
6217 dev_priv
->display
.update_wm
= pineview_update_wm
;
6218 dev_priv
->display
.init_clock_gating
= gen3_init_clock_gating
;
6219 } else if (IS_G4X(dev
)) {
6220 dev_priv
->display
.update_wm
= g4x_update_wm
;
6221 dev_priv
->display
.init_clock_gating
= g4x_init_clock_gating
;
6222 } else if (IS_GEN4(dev
)) {
6223 dev_priv
->display
.update_wm
= i965_update_wm
;
6224 if (IS_CRESTLINE(dev
))
6225 dev_priv
->display
.init_clock_gating
= crestline_init_clock_gating
;
6226 else if (IS_BROADWATER(dev
))
6227 dev_priv
->display
.init_clock_gating
= broadwater_init_clock_gating
;
6228 } else if (IS_GEN3(dev
)) {
6229 dev_priv
->display
.update_wm
= i9xx_update_wm
;
6230 dev_priv
->display
.get_fifo_size
= i9xx_get_fifo_size
;
6231 dev_priv
->display
.init_clock_gating
= gen3_init_clock_gating
;
6232 } else if (IS_I865G(dev
)) {
6233 dev_priv
->display
.update_wm
= i830_update_wm
;
6234 dev_priv
->display
.init_clock_gating
= i85x_init_clock_gating
;
6235 dev_priv
->display
.get_fifo_size
= i830_get_fifo_size
;
6236 } else if (IS_I85X(dev
)) {
6237 dev_priv
->display
.update_wm
= i9xx_update_wm
;
6238 dev_priv
->display
.get_fifo_size
= i85x_get_fifo_size
;
6239 dev_priv
->display
.init_clock_gating
= i85x_init_clock_gating
;
6241 dev_priv
->display
.update_wm
= i830_update_wm
;
6242 dev_priv
->display
.init_clock_gating
= i830_init_clock_gating
;
6244 dev_priv
->display
.get_fifo_size
= i845_get_fifo_size
;
6246 dev_priv
->display
.get_fifo_size
= i830_get_fifo_size
;
6250 int sandybridge_pcode_read(struct drm_i915_private
*dev_priv
, u8 mbox
, u32
*val
)
6252 WARN_ON(!mutex_is_locked(&dev_priv
->rps
.hw_lock
));
6254 if (I915_READ(GEN6_PCODE_MAILBOX
) & GEN6_PCODE_READY
) {
6255 DRM_DEBUG_DRIVER("warning: pcode (read) mailbox access failed\n");
6259 I915_WRITE(GEN6_PCODE_DATA
, *val
);
6260 I915_WRITE(GEN6_PCODE_MAILBOX
, GEN6_PCODE_READY
| mbox
);
6262 if (wait_for((I915_READ(GEN6_PCODE_MAILBOX
) & GEN6_PCODE_READY
) == 0,
6264 DRM_ERROR("timeout waiting for pcode read (%d) to finish\n", mbox
);
6268 *val
= I915_READ(GEN6_PCODE_DATA
);
6269 I915_WRITE(GEN6_PCODE_DATA
, 0);
6274 int sandybridge_pcode_write(struct drm_i915_private
*dev_priv
, u8 mbox
, u32 val
)
6276 WARN_ON(!mutex_is_locked(&dev_priv
->rps
.hw_lock
));
6278 if (I915_READ(GEN6_PCODE_MAILBOX
) & GEN6_PCODE_READY
) {
6279 DRM_DEBUG_DRIVER("warning: pcode (write) mailbox access failed\n");
6283 I915_WRITE(GEN6_PCODE_DATA
, val
);
6284 I915_WRITE(GEN6_PCODE_MAILBOX
, GEN6_PCODE_READY
| mbox
);
6286 if (wait_for((I915_READ(GEN6_PCODE_MAILBOX
) & GEN6_PCODE_READY
) == 0,
6288 DRM_ERROR("timeout waiting for pcode write (%d) to finish\n", mbox
);
6292 I915_WRITE(GEN6_PCODE_DATA
, 0);
6297 int vlv_gpu_freq(struct drm_i915_private
*dev_priv
, int val
)
6302 switch (dev_priv
->mem_freq
) {
6316 return DIV_ROUND_CLOSEST(dev_priv
->mem_freq
* (val
+ 6 - 0xbd), 4 * div
);
6319 int vlv_freq_opcode(struct drm_i915_private
*dev_priv
, int val
)
6324 switch (dev_priv
->mem_freq
) {
6338 return DIV_ROUND_CLOSEST(4 * mul
* val
, dev_priv
->mem_freq
) + 0xbd - 6;
6341 void intel_pm_init(struct drm_device
*dev
)
6343 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
6345 INIT_DELAYED_WORK(&dev_priv
->rps
.delayed_resume_work
,
6346 intel_gen6_powersave_work
);