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Merge git://git.kvack.org/~bcrl/aio-next
[mirror_ubuntu-artful-kernel.git] / drivers / gpu / drm / i915 / intel_ddi.c
1 /*
2 * Copyright © 2012 Intel Corporation
3 *
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:
10 *
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
13 * Software.
14 *
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
21 * IN THE SOFTWARE.
22 *
23 * Authors:
24 * Eugeni Dodonov <eugeni.dodonov@intel.com>
25 *
26 */
27
28 #include "i915_drv.h"
29 #include "intel_drv.h"
30
31 /* HDMI/DVI modes ignore everything but the last 2 items. So we share
32 * them for both DP and FDI transports, allowing those ports to
33 * automatically adapt to HDMI connections as well
34 */
35 static const u32 hsw_ddi_translations_dp[] = {
36 0x00FFFFFF, 0x0006000E, /* DP parameters */
37 0x00D75FFF, 0x0005000A,
38 0x00C30FFF, 0x00040006,
39 0x80AAAFFF, 0x000B0000,
40 0x00FFFFFF, 0x0005000A,
41 0x00D75FFF, 0x000C0004,
42 0x80C30FFF, 0x000B0000,
43 0x00FFFFFF, 0x00040006,
44 0x80D75FFF, 0x000B0000,
45 };
46
47 static const u32 hsw_ddi_translations_fdi[] = {
48 0x00FFFFFF, 0x0007000E, /* FDI parameters */
49 0x00D75FFF, 0x000F000A,
50 0x00C30FFF, 0x00060006,
51 0x00AAAFFF, 0x001E0000,
52 0x00FFFFFF, 0x000F000A,
53 0x00D75FFF, 0x00160004,
54 0x00C30FFF, 0x001E0000,
55 0x00FFFFFF, 0x00060006,
56 0x00D75FFF, 0x001E0000,
57 };
58
59 static const u32 hsw_ddi_translations_hdmi[] = {
60 /* Idx NT mV diff T mV diff db */
61 0x00FFFFFF, 0x0006000E, /* 0: 400 400 0 */
62 0x00E79FFF, 0x000E000C, /* 1: 400 500 2 */
63 0x00D75FFF, 0x0005000A, /* 2: 400 600 3.5 */
64 0x00FFFFFF, 0x0005000A, /* 3: 600 600 0 */
65 0x00E79FFF, 0x001D0007, /* 4: 600 750 2 */
66 0x00D75FFF, 0x000C0004, /* 5: 600 900 3.5 */
67 0x00FFFFFF, 0x00040006, /* 6: 800 800 0 */
68 0x80E79FFF, 0x00030002, /* 7: 800 1000 2 */
69 0x00FFFFFF, 0x00140005, /* 8: 850 850 0 */
70 0x00FFFFFF, 0x000C0004, /* 9: 900 900 0 */
71 0x00FFFFFF, 0x001C0003, /* 10: 950 950 0 */
72 0x80FFFFFF, 0x00030002, /* 11: 1000 1000 0 */
73 };
74
75 static const u32 bdw_ddi_translations_edp[] = {
76 0x00FFFFFF, 0x00000012, /* DP parameters */
77 0x00EBAFFF, 0x00020011,
78 0x00C71FFF, 0x0006000F,
79 0x00FFFFFF, 0x00020011,
80 0x00DB6FFF, 0x0005000F,
81 0x00BEEFFF, 0x000A000C,
82 0x00FFFFFF, 0x0005000F,
83 0x00DB6FFF, 0x000A000C,
84 0x00FFFFFF, 0x000A000C,
85 0x00FFFFFF, 0x00140006 /* HDMI parameters 800mV 0dB*/
86 };
87
88 static const u32 bdw_ddi_translations_dp[] = {
89 0x00FFFFFF, 0x0007000E, /* DP parameters */
90 0x00D75FFF, 0x000E000A,
91 0x00BEFFFF, 0x00140006,
92 0x00FFFFFF, 0x000E000A,
93 0x00D75FFF, 0x00180004,
94 0x80CB2FFF, 0x001B0002,
95 0x00F7DFFF, 0x00180004,
96 0x80D75FFF, 0x001B0002,
97 0x80FFFFFF, 0x001B0002,
98 0x00FFFFFF, 0x00140006 /* HDMI parameters 800mV 0dB*/
99 };
100
101 static const u32 bdw_ddi_translations_fdi[] = {
102 0x00FFFFFF, 0x0001000E, /* FDI parameters */
103 0x00D75FFF, 0x0004000A,
104 0x00C30FFF, 0x00070006,
105 0x00AAAFFF, 0x000C0000,
106 0x00FFFFFF, 0x0004000A,
107 0x00D75FFF, 0x00090004,
108 0x00C30FFF, 0x000C0000,
109 0x00FFFFFF, 0x00070006,
110 0x00D75FFF, 0x000C0000,
111 0x00FFFFFF, 0x00140006 /* HDMI parameters 800mV 0dB*/
112 };
113
114 enum port intel_ddi_get_encoder_port(struct intel_encoder *intel_encoder)
115 {
116 struct drm_encoder *encoder = &intel_encoder->base;
117 int type = intel_encoder->type;
118
119 if (type == INTEL_OUTPUT_DISPLAYPORT || type == INTEL_OUTPUT_EDP ||
120 type == INTEL_OUTPUT_HDMI || type == INTEL_OUTPUT_UNKNOWN) {
121 struct intel_digital_port *intel_dig_port =
122 enc_to_dig_port(encoder);
123 return intel_dig_port->port;
124
125 } else if (type == INTEL_OUTPUT_ANALOG) {
126 return PORT_E;
127
128 } else {
129 DRM_ERROR("Invalid DDI encoder type %d\n", type);
130 BUG();
131 }
132 }
133
134 /*
135 * Starting with Haswell, DDI port buffers must be programmed with correct
136 * values in advance. The buffer values are different for FDI and DP modes,
137 * but the HDMI/DVI fields are shared among those. So we program the DDI
138 * in either FDI or DP modes only, as HDMI connections will work with both
139 * of those
140 */
141 static void intel_prepare_ddi_buffers(struct drm_device *dev, enum port port)
142 {
143 struct drm_i915_private *dev_priv = dev->dev_private;
144 u32 reg;
145 int i;
146 int hdmi_level = dev_priv->vbt.ddi_port_info[port].hdmi_level_shift;
147 const u32 *ddi_translations_fdi;
148 const u32 *ddi_translations_dp;
149 const u32 *ddi_translations_edp;
150 const u32 *ddi_translations;
151
152 if (IS_BROADWELL(dev)) {
153 ddi_translations_fdi = bdw_ddi_translations_fdi;
154 ddi_translations_dp = bdw_ddi_translations_dp;
155 ddi_translations_edp = bdw_ddi_translations_edp;
156 } else if (IS_HASWELL(dev)) {
157 ddi_translations_fdi = hsw_ddi_translations_fdi;
158 ddi_translations_dp = hsw_ddi_translations_dp;
159 ddi_translations_edp = hsw_ddi_translations_dp;
160 } else {
161 WARN(1, "ddi translation table missing\n");
162 ddi_translations_edp = bdw_ddi_translations_dp;
163 ddi_translations_fdi = bdw_ddi_translations_fdi;
164 ddi_translations_dp = bdw_ddi_translations_dp;
165 }
166
167 switch (port) {
168 case PORT_A:
169 ddi_translations = ddi_translations_edp;
170 break;
171 case PORT_B:
172 case PORT_C:
173 ddi_translations = ddi_translations_dp;
174 break;
175 case PORT_D:
176 if (intel_dpd_is_edp(dev))
177 ddi_translations = ddi_translations_edp;
178 else
179 ddi_translations = ddi_translations_dp;
180 break;
181 case PORT_E:
182 ddi_translations = ddi_translations_fdi;
183 break;
184 default:
185 BUG();
186 }
187
188 for (i = 0, reg = DDI_BUF_TRANS(port);
189 i < ARRAY_SIZE(hsw_ddi_translations_fdi); i++) {
190 I915_WRITE(reg, ddi_translations[i]);
191 reg += 4;
192 }
193 /* Entry 9 is for HDMI: */
194 for (i = 0; i < 2; i++) {
195 I915_WRITE(reg, hsw_ddi_translations_hdmi[hdmi_level * 2 + i]);
196 reg += 4;
197 }
198 }
199
200 /* Program DDI buffers translations for DP. By default, program ports A-D in DP
201 * mode and port E for FDI.
202 */
203 void intel_prepare_ddi(struct drm_device *dev)
204 {
205 int port;
206
207 if (!HAS_DDI(dev))
208 return;
209
210 for (port = PORT_A; port <= PORT_E; port++)
211 intel_prepare_ddi_buffers(dev, port);
212 }
213
214 static const long hsw_ddi_buf_ctl_values[] = {
215 DDI_BUF_EMP_400MV_0DB_HSW,
216 DDI_BUF_EMP_400MV_3_5DB_HSW,
217 DDI_BUF_EMP_400MV_6DB_HSW,
218 DDI_BUF_EMP_400MV_9_5DB_HSW,
219 DDI_BUF_EMP_600MV_0DB_HSW,
220 DDI_BUF_EMP_600MV_3_5DB_HSW,
221 DDI_BUF_EMP_600MV_6DB_HSW,
222 DDI_BUF_EMP_800MV_0DB_HSW,
223 DDI_BUF_EMP_800MV_3_5DB_HSW
224 };
225
226 static void intel_wait_ddi_buf_idle(struct drm_i915_private *dev_priv,
227 enum port port)
228 {
229 uint32_t reg = DDI_BUF_CTL(port);
230 int i;
231
232 for (i = 0; i < 8; i++) {
233 udelay(1);
234 if (I915_READ(reg) & DDI_BUF_IS_IDLE)
235 return;
236 }
237 DRM_ERROR("Timeout waiting for DDI BUF %c idle bit\n", port_name(port));
238 }
239
240 /* Starting with Haswell, different DDI ports can work in FDI mode for
241 * connection to the PCH-located connectors. For this, it is necessary to train
242 * both the DDI port and PCH receiver for the desired DDI buffer settings.
243 *
244 * The recommended port to work in FDI mode is DDI E, which we use here. Also,
245 * please note that when FDI mode is active on DDI E, it shares 2 lines with
246 * DDI A (which is used for eDP)
247 */
248
249 void hsw_fdi_link_train(struct drm_crtc *crtc)
250 {
251 struct drm_device *dev = crtc->dev;
252 struct drm_i915_private *dev_priv = dev->dev_private;
253 struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
254 u32 temp, i, rx_ctl_val;
255
256 /* Set the FDI_RX_MISC pwrdn lanes and the 2 workarounds listed at the
257 * mode set "sequence for CRT port" document:
258 * - TP1 to TP2 time with the default value
259 * - FDI delay to 90h
260 *
261 * WaFDIAutoLinkSetTimingOverrride:hsw
262 */
263 I915_WRITE(_FDI_RXA_MISC, FDI_RX_PWRDN_LANE1_VAL(2) |
264 FDI_RX_PWRDN_LANE0_VAL(2) |
265 FDI_RX_TP1_TO_TP2_48 | FDI_RX_FDI_DELAY_90);
266
267 /* Enable the PCH Receiver FDI PLL */
268 rx_ctl_val = dev_priv->fdi_rx_config | FDI_RX_ENHANCE_FRAME_ENABLE |
269 FDI_RX_PLL_ENABLE |
270 FDI_DP_PORT_WIDTH(intel_crtc->config.fdi_lanes);
271 I915_WRITE(_FDI_RXA_CTL, rx_ctl_val);
272 POSTING_READ(_FDI_RXA_CTL);
273 udelay(220);
274
275 /* Switch from Rawclk to PCDclk */
276 rx_ctl_val |= FDI_PCDCLK;
277 I915_WRITE(_FDI_RXA_CTL, rx_ctl_val);
278
279 /* Configure Port Clock Select */
280 I915_WRITE(PORT_CLK_SEL(PORT_E), intel_crtc->ddi_pll_sel);
281
282 /* Start the training iterating through available voltages and emphasis,
283 * testing each value twice. */
284 for (i = 0; i < ARRAY_SIZE(hsw_ddi_buf_ctl_values) * 2; i++) {
285 /* Configure DP_TP_CTL with auto-training */
286 I915_WRITE(DP_TP_CTL(PORT_E),
287 DP_TP_CTL_FDI_AUTOTRAIN |
288 DP_TP_CTL_ENHANCED_FRAME_ENABLE |
289 DP_TP_CTL_LINK_TRAIN_PAT1 |
290 DP_TP_CTL_ENABLE);
291
292 /* Configure and enable DDI_BUF_CTL for DDI E with next voltage.
293 * DDI E does not support port reversal, the functionality is
294 * achieved on the PCH side in FDI_RX_CTL, so no need to set the
295 * port reversal bit */
296 I915_WRITE(DDI_BUF_CTL(PORT_E),
297 DDI_BUF_CTL_ENABLE |
298 ((intel_crtc->config.fdi_lanes - 1) << 1) |
299 hsw_ddi_buf_ctl_values[i / 2]);
300 POSTING_READ(DDI_BUF_CTL(PORT_E));
301
302 udelay(600);
303
304 /* Program PCH FDI Receiver TU */
305 I915_WRITE(_FDI_RXA_TUSIZE1, TU_SIZE(64));
306
307 /* Enable PCH FDI Receiver with auto-training */
308 rx_ctl_val |= FDI_RX_ENABLE | FDI_LINK_TRAIN_AUTO;
309 I915_WRITE(_FDI_RXA_CTL, rx_ctl_val);
310 POSTING_READ(_FDI_RXA_CTL);
311
312 /* Wait for FDI receiver lane calibration */
313 udelay(30);
314
315 /* Unset FDI_RX_MISC pwrdn lanes */
316 temp = I915_READ(_FDI_RXA_MISC);
317 temp &= ~(FDI_RX_PWRDN_LANE1_MASK | FDI_RX_PWRDN_LANE0_MASK);
318 I915_WRITE(_FDI_RXA_MISC, temp);
319 POSTING_READ(_FDI_RXA_MISC);
320
321 /* Wait for FDI auto training time */
322 udelay(5);
323
324 temp = I915_READ(DP_TP_STATUS(PORT_E));
325 if (temp & DP_TP_STATUS_AUTOTRAIN_DONE) {
326 DRM_DEBUG_KMS("FDI link training done on step %d\n", i);
327
328 /* Enable normal pixel sending for FDI */
329 I915_WRITE(DP_TP_CTL(PORT_E),
330 DP_TP_CTL_FDI_AUTOTRAIN |
331 DP_TP_CTL_LINK_TRAIN_NORMAL |
332 DP_TP_CTL_ENHANCED_FRAME_ENABLE |
333 DP_TP_CTL_ENABLE);
334
335 return;
336 }
337
338 temp = I915_READ(DDI_BUF_CTL(PORT_E));
339 temp &= ~DDI_BUF_CTL_ENABLE;
340 I915_WRITE(DDI_BUF_CTL(PORT_E), temp);
341 POSTING_READ(DDI_BUF_CTL(PORT_E));
342
343 /* Disable DP_TP_CTL and FDI_RX_CTL and retry */
344 temp = I915_READ(DP_TP_CTL(PORT_E));
345 temp &= ~(DP_TP_CTL_ENABLE | DP_TP_CTL_LINK_TRAIN_MASK);
346 temp |= DP_TP_CTL_LINK_TRAIN_PAT1;
347 I915_WRITE(DP_TP_CTL(PORT_E), temp);
348 POSTING_READ(DP_TP_CTL(PORT_E));
349
350 intel_wait_ddi_buf_idle(dev_priv, PORT_E);
351
352 rx_ctl_val &= ~FDI_RX_ENABLE;
353 I915_WRITE(_FDI_RXA_CTL, rx_ctl_val);
354 POSTING_READ(_FDI_RXA_CTL);
355
356 /* Reset FDI_RX_MISC pwrdn lanes */
357 temp = I915_READ(_FDI_RXA_MISC);
358 temp &= ~(FDI_RX_PWRDN_LANE1_MASK | FDI_RX_PWRDN_LANE0_MASK);
359 temp |= FDI_RX_PWRDN_LANE1_VAL(2) | FDI_RX_PWRDN_LANE0_VAL(2);
360 I915_WRITE(_FDI_RXA_MISC, temp);
361 POSTING_READ(_FDI_RXA_MISC);
362 }
363
364 DRM_ERROR("FDI link training failed!\n");
365 }
366
367 static void intel_ddi_mode_set(struct intel_encoder *encoder)
368 {
369 struct intel_crtc *crtc = to_intel_crtc(encoder->base.crtc);
370 int port = intel_ddi_get_encoder_port(encoder);
371 int pipe = crtc->pipe;
372 int type = encoder->type;
373 struct drm_display_mode *adjusted_mode = &crtc->config.adjusted_mode;
374
375 DRM_DEBUG_KMS("Preparing DDI mode on port %c, pipe %c\n",
376 port_name(port), pipe_name(pipe));
377
378 crtc->eld_vld = false;
379 if (type == INTEL_OUTPUT_DISPLAYPORT || type == INTEL_OUTPUT_EDP) {
380 struct intel_dp *intel_dp = enc_to_intel_dp(&encoder->base);
381 struct intel_digital_port *intel_dig_port =
382 enc_to_dig_port(&encoder->base);
383
384 intel_dp->DP = intel_dig_port->saved_port_bits |
385 DDI_BUF_CTL_ENABLE | DDI_BUF_EMP_400MV_0DB_HSW;
386 intel_dp->DP |= DDI_PORT_WIDTH(intel_dp->lane_count);
387
388 if (intel_dp->has_audio) {
389 DRM_DEBUG_DRIVER("DP audio on pipe %c on DDI\n",
390 pipe_name(crtc->pipe));
391
392 /* write eld */
393 DRM_DEBUG_DRIVER("DP audio: write eld information\n");
394 intel_write_eld(&encoder->base, adjusted_mode);
395 }
396 } else if (type == INTEL_OUTPUT_HDMI) {
397 struct intel_hdmi *intel_hdmi = enc_to_intel_hdmi(&encoder->base);
398
399 if (intel_hdmi->has_audio) {
400 /* Proper support for digital audio needs a new logic
401 * and a new set of registers, so we leave it for future
402 * patch bombing.
403 */
404 DRM_DEBUG_DRIVER("HDMI audio on pipe %c on DDI\n",
405 pipe_name(crtc->pipe));
406
407 /* write eld */
408 DRM_DEBUG_DRIVER("HDMI audio: write eld information\n");
409 intel_write_eld(&encoder->base, adjusted_mode);
410 }
411
412 intel_hdmi->set_infoframes(&encoder->base, adjusted_mode);
413 }
414 }
415
416 static struct intel_encoder *
417 intel_ddi_get_crtc_encoder(struct drm_crtc *crtc)
418 {
419 struct drm_device *dev = crtc->dev;
420 struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
421 struct intel_encoder *intel_encoder, *ret = NULL;
422 int num_encoders = 0;
423
424 for_each_encoder_on_crtc(dev, crtc, intel_encoder) {
425 ret = intel_encoder;
426 num_encoders++;
427 }
428
429 if (num_encoders != 1)
430 WARN(1, "%d encoders on crtc for pipe %c\n", num_encoders,
431 pipe_name(intel_crtc->pipe));
432
433 BUG_ON(ret == NULL);
434 return ret;
435 }
436
437 void intel_ddi_put_crtc_pll(struct drm_crtc *crtc)
438 {
439 struct drm_i915_private *dev_priv = crtc->dev->dev_private;
440 struct intel_ddi_plls *plls = &dev_priv->ddi_plls;
441 struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
442 uint32_t val;
443
444 switch (intel_crtc->ddi_pll_sel) {
445 case PORT_CLK_SEL_SPLL:
446 plls->spll_refcount--;
447 if (plls->spll_refcount == 0) {
448 DRM_DEBUG_KMS("Disabling SPLL\n");
449 val = I915_READ(SPLL_CTL);
450 WARN_ON(!(val & SPLL_PLL_ENABLE));
451 I915_WRITE(SPLL_CTL, val & ~SPLL_PLL_ENABLE);
452 POSTING_READ(SPLL_CTL);
453 }
454 break;
455 case PORT_CLK_SEL_WRPLL1:
456 plls->wrpll1_refcount--;
457 if (plls->wrpll1_refcount == 0) {
458 DRM_DEBUG_KMS("Disabling WRPLL 1\n");
459 val = I915_READ(WRPLL_CTL1);
460 WARN_ON(!(val & WRPLL_PLL_ENABLE));
461 I915_WRITE(WRPLL_CTL1, val & ~WRPLL_PLL_ENABLE);
462 POSTING_READ(WRPLL_CTL1);
463 }
464 break;
465 case PORT_CLK_SEL_WRPLL2:
466 plls->wrpll2_refcount--;
467 if (plls->wrpll2_refcount == 0) {
468 DRM_DEBUG_KMS("Disabling WRPLL 2\n");
469 val = I915_READ(WRPLL_CTL2);
470 WARN_ON(!(val & WRPLL_PLL_ENABLE));
471 I915_WRITE(WRPLL_CTL2, val & ~WRPLL_PLL_ENABLE);
472 POSTING_READ(WRPLL_CTL2);
473 }
474 break;
475 }
476
477 WARN(plls->spll_refcount < 0, "Invalid SPLL refcount\n");
478 WARN(plls->wrpll1_refcount < 0, "Invalid WRPLL1 refcount\n");
479 WARN(plls->wrpll2_refcount < 0, "Invalid WRPLL2 refcount\n");
480
481 intel_crtc->ddi_pll_sel = PORT_CLK_SEL_NONE;
482 }
483
484 #define LC_FREQ 2700
485 #define LC_FREQ_2K (LC_FREQ * 2000)
486
487 #define P_MIN 2
488 #define P_MAX 64
489 #define P_INC 2
490
491 /* Constraints for PLL good behavior */
492 #define REF_MIN 48
493 #define REF_MAX 400
494 #define VCO_MIN 2400
495 #define VCO_MAX 4800
496
497 #define ABS_DIFF(a, b) ((a > b) ? (a - b) : (b - a))
498
499 struct wrpll_rnp {
500 unsigned p, n2, r2;
501 };
502
503 static unsigned wrpll_get_budget_for_freq(int clock)
504 {
505 unsigned budget;
506
507 switch (clock) {
508 case 25175000:
509 case 25200000:
510 case 27000000:
511 case 27027000:
512 case 37762500:
513 case 37800000:
514 case 40500000:
515 case 40541000:
516 case 54000000:
517 case 54054000:
518 case 59341000:
519 case 59400000:
520 case 72000000:
521 case 74176000:
522 case 74250000:
523 case 81000000:
524 case 81081000:
525 case 89012000:
526 case 89100000:
527 case 108000000:
528 case 108108000:
529 case 111264000:
530 case 111375000:
531 case 148352000:
532 case 148500000:
533 case 162000000:
534 case 162162000:
535 case 222525000:
536 case 222750000:
537 case 296703000:
538 case 297000000:
539 budget = 0;
540 break;
541 case 233500000:
542 case 245250000:
543 case 247750000:
544 case 253250000:
545 case 298000000:
546 budget = 1500;
547 break;
548 case 169128000:
549 case 169500000:
550 case 179500000:
551 case 202000000:
552 budget = 2000;
553 break;
554 case 256250000:
555 case 262500000:
556 case 270000000:
557 case 272500000:
558 case 273750000:
559 case 280750000:
560 case 281250000:
561 case 286000000:
562 case 291750000:
563 budget = 4000;
564 break;
565 case 267250000:
566 case 268500000:
567 budget = 5000;
568 break;
569 default:
570 budget = 1000;
571 break;
572 }
573
574 return budget;
575 }
576
577 static void wrpll_update_rnp(uint64_t freq2k, unsigned budget,
578 unsigned r2, unsigned n2, unsigned p,
579 struct wrpll_rnp *best)
580 {
581 uint64_t a, b, c, d, diff, diff_best;
582
583 /* No best (r,n,p) yet */
584 if (best->p == 0) {
585 best->p = p;
586 best->n2 = n2;
587 best->r2 = r2;
588 return;
589 }
590
591 /*
592 * Output clock is (LC_FREQ_2K / 2000) * N / (P * R), which compares to
593 * freq2k.
594 *
595 * delta = 1e6 *
596 * abs(freq2k - (LC_FREQ_2K * n2/(p * r2))) /
597 * freq2k;
598 *
599 * and we would like delta <= budget.
600 *
601 * If the discrepancy is above the PPM-based budget, always prefer to
602 * improve upon the previous solution. However, if you're within the
603 * budget, try to maximize Ref * VCO, that is N / (P * R^2).
604 */
605 a = freq2k * budget * p * r2;
606 b = freq2k * budget * best->p * best->r2;
607 diff = ABS_DIFF((freq2k * p * r2), (LC_FREQ_2K * n2));
608 diff_best = ABS_DIFF((freq2k * best->p * best->r2),
609 (LC_FREQ_2K * best->n2));
610 c = 1000000 * diff;
611 d = 1000000 * diff_best;
612
613 if (a < c && b < d) {
614 /* If both are above the budget, pick the closer */
615 if (best->p * best->r2 * diff < p * r2 * diff_best) {
616 best->p = p;
617 best->n2 = n2;
618 best->r2 = r2;
619 }
620 } else if (a >= c && b < d) {
621 /* If A is below the threshold but B is above it? Update. */
622 best->p = p;
623 best->n2 = n2;
624 best->r2 = r2;
625 } else if (a >= c && b >= d) {
626 /* Both are below the limit, so pick the higher n2/(r2*r2) */
627 if (n2 * best->r2 * best->r2 > best->n2 * r2 * r2) {
628 best->p = p;
629 best->n2 = n2;
630 best->r2 = r2;
631 }
632 }
633 /* Otherwise a < c && b >= d, do nothing */
634 }
635
636 static void
637 intel_ddi_calculate_wrpll(int clock /* in Hz */,
638 unsigned *r2_out, unsigned *n2_out, unsigned *p_out)
639 {
640 uint64_t freq2k;
641 unsigned p, n2, r2;
642 struct wrpll_rnp best = { 0, 0, 0 };
643 unsigned budget;
644
645 freq2k = clock / 100;
646
647 budget = wrpll_get_budget_for_freq(clock);
648
649 /* Special case handling for 540 pixel clock: bypass WR PLL entirely
650 * and directly pass the LC PLL to it. */
651 if (freq2k == 5400000) {
652 *n2_out = 2;
653 *p_out = 1;
654 *r2_out = 2;
655 return;
656 }
657
658 /*
659 * Ref = LC_FREQ / R, where Ref is the actual reference input seen by
660 * the WR PLL.
661 *
662 * We want R so that REF_MIN <= Ref <= REF_MAX.
663 * Injecting R2 = 2 * R gives:
664 * REF_MAX * r2 > LC_FREQ * 2 and
665 * REF_MIN * r2 < LC_FREQ * 2
666 *
667 * Which means the desired boundaries for r2 are:
668 * LC_FREQ * 2 / REF_MAX < r2 < LC_FREQ * 2 / REF_MIN
669 *
670 */
671 for (r2 = LC_FREQ * 2 / REF_MAX + 1;
672 r2 <= LC_FREQ * 2 / REF_MIN;
673 r2++) {
674
675 /*
676 * VCO = N * Ref, that is: VCO = N * LC_FREQ / R
677 *
678 * Once again we want VCO_MIN <= VCO <= VCO_MAX.
679 * Injecting R2 = 2 * R and N2 = 2 * N, we get:
680 * VCO_MAX * r2 > n2 * LC_FREQ and
681 * VCO_MIN * r2 < n2 * LC_FREQ)
682 *
683 * Which means the desired boundaries for n2 are:
684 * VCO_MIN * r2 / LC_FREQ < n2 < VCO_MAX * r2 / LC_FREQ
685 */
686 for (n2 = VCO_MIN * r2 / LC_FREQ + 1;
687 n2 <= VCO_MAX * r2 / LC_FREQ;
688 n2++) {
689
690 for (p = P_MIN; p <= P_MAX; p += P_INC)
691 wrpll_update_rnp(freq2k, budget,
692 r2, n2, p, &best);
693 }
694 }
695
696 *n2_out = best.n2;
697 *p_out = best.p;
698 *r2_out = best.r2;
699
700 DRM_DEBUG_KMS("WRPLL: %dHz refresh rate with p=%d, n2=%d r2=%d\n",
701 clock, *p_out, *n2_out, *r2_out);
702 }
703
704 bool intel_ddi_pll_mode_set(struct drm_crtc *crtc)
705 {
706 struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
707 struct intel_encoder *intel_encoder = intel_ddi_get_crtc_encoder(crtc);
708 struct drm_encoder *encoder = &intel_encoder->base;
709 struct drm_i915_private *dev_priv = crtc->dev->dev_private;
710 struct intel_ddi_plls *plls = &dev_priv->ddi_plls;
711 int type = intel_encoder->type;
712 enum pipe pipe = intel_crtc->pipe;
713 uint32_t reg, val;
714 int clock = intel_crtc->config.port_clock;
715
716 /* TODO: reuse PLLs when possible (compare values) */
717
718 intel_ddi_put_crtc_pll(crtc);
719
720 if (type == INTEL_OUTPUT_DISPLAYPORT || type == INTEL_OUTPUT_EDP) {
721 struct intel_dp *intel_dp = enc_to_intel_dp(encoder);
722
723 switch (intel_dp->link_bw) {
724 case DP_LINK_BW_1_62:
725 intel_crtc->ddi_pll_sel = PORT_CLK_SEL_LCPLL_810;
726 break;
727 case DP_LINK_BW_2_7:
728 intel_crtc->ddi_pll_sel = PORT_CLK_SEL_LCPLL_1350;
729 break;
730 case DP_LINK_BW_5_4:
731 intel_crtc->ddi_pll_sel = PORT_CLK_SEL_LCPLL_2700;
732 break;
733 default:
734 DRM_ERROR("Link bandwidth %d unsupported\n",
735 intel_dp->link_bw);
736 return false;
737 }
738
739 /* We don't need to turn any PLL on because we'll use LCPLL. */
740 return true;
741
742 } else if (type == INTEL_OUTPUT_HDMI) {
743 unsigned p, n2, r2;
744
745 if (plls->wrpll1_refcount == 0) {
746 DRM_DEBUG_KMS("Using WRPLL 1 on pipe %c\n",
747 pipe_name(pipe));
748 plls->wrpll1_refcount++;
749 reg = WRPLL_CTL1;
750 intel_crtc->ddi_pll_sel = PORT_CLK_SEL_WRPLL1;
751 } else if (plls->wrpll2_refcount == 0) {
752 DRM_DEBUG_KMS("Using WRPLL 2 on pipe %c\n",
753 pipe_name(pipe));
754 plls->wrpll2_refcount++;
755 reg = WRPLL_CTL2;
756 intel_crtc->ddi_pll_sel = PORT_CLK_SEL_WRPLL2;
757 } else {
758 DRM_ERROR("No WRPLLs available!\n");
759 return false;
760 }
761
762 WARN(I915_READ(reg) & WRPLL_PLL_ENABLE,
763 "WRPLL already enabled\n");
764
765 intel_ddi_calculate_wrpll(clock * 1000, &r2, &n2, &p);
766
767 val = WRPLL_PLL_ENABLE | WRPLL_PLL_SELECT_LCPLL_2700 |
768 WRPLL_DIVIDER_REFERENCE(r2) | WRPLL_DIVIDER_FEEDBACK(n2) |
769 WRPLL_DIVIDER_POST(p);
770
771 } else if (type == INTEL_OUTPUT_ANALOG) {
772 if (plls->spll_refcount == 0) {
773 DRM_DEBUG_KMS("Using SPLL on pipe %c\n",
774 pipe_name(pipe));
775 plls->spll_refcount++;
776 reg = SPLL_CTL;
777 intel_crtc->ddi_pll_sel = PORT_CLK_SEL_SPLL;
778 } else {
779 DRM_ERROR("SPLL already in use\n");
780 return false;
781 }
782
783 WARN(I915_READ(reg) & SPLL_PLL_ENABLE,
784 "SPLL already enabled\n");
785
786 val = SPLL_PLL_ENABLE | SPLL_PLL_FREQ_1350MHz | SPLL_PLL_SSC;
787
788 } else {
789 WARN(1, "Invalid DDI encoder type %d\n", type);
790 return false;
791 }
792
793 I915_WRITE(reg, val);
794 udelay(20);
795
796 return true;
797 }
798
799 void intel_ddi_set_pipe_settings(struct drm_crtc *crtc)
800 {
801 struct drm_i915_private *dev_priv = crtc->dev->dev_private;
802 struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
803 struct intel_encoder *intel_encoder = intel_ddi_get_crtc_encoder(crtc);
804 enum transcoder cpu_transcoder = intel_crtc->config.cpu_transcoder;
805 int type = intel_encoder->type;
806 uint32_t temp;
807
808 if (type == INTEL_OUTPUT_DISPLAYPORT || type == INTEL_OUTPUT_EDP) {
809
810 temp = TRANS_MSA_SYNC_CLK;
811 switch (intel_crtc->config.pipe_bpp) {
812 case 18:
813 temp |= TRANS_MSA_6_BPC;
814 break;
815 case 24:
816 temp |= TRANS_MSA_8_BPC;
817 break;
818 case 30:
819 temp |= TRANS_MSA_10_BPC;
820 break;
821 case 36:
822 temp |= TRANS_MSA_12_BPC;
823 break;
824 default:
825 BUG();
826 }
827 I915_WRITE(TRANS_MSA_MISC(cpu_transcoder), temp);
828 }
829 }
830
831 void intel_ddi_enable_transcoder_func(struct drm_crtc *crtc)
832 {
833 struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
834 struct intel_encoder *intel_encoder = intel_ddi_get_crtc_encoder(crtc);
835 struct drm_encoder *encoder = &intel_encoder->base;
836 struct drm_device *dev = crtc->dev;
837 struct drm_i915_private *dev_priv = dev->dev_private;
838 enum pipe pipe = intel_crtc->pipe;
839 enum transcoder cpu_transcoder = intel_crtc->config.cpu_transcoder;
840 enum port port = intel_ddi_get_encoder_port(intel_encoder);
841 int type = intel_encoder->type;
842 uint32_t temp;
843
844 /* Enable TRANS_DDI_FUNC_CTL for the pipe to work in HDMI mode */
845 temp = TRANS_DDI_FUNC_ENABLE;
846 temp |= TRANS_DDI_SELECT_PORT(port);
847
848 switch (intel_crtc->config.pipe_bpp) {
849 case 18:
850 temp |= TRANS_DDI_BPC_6;
851 break;
852 case 24:
853 temp |= TRANS_DDI_BPC_8;
854 break;
855 case 30:
856 temp |= TRANS_DDI_BPC_10;
857 break;
858 case 36:
859 temp |= TRANS_DDI_BPC_12;
860 break;
861 default:
862 BUG();
863 }
864
865 if (intel_crtc->config.adjusted_mode.flags & DRM_MODE_FLAG_PVSYNC)
866 temp |= TRANS_DDI_PVSYNC;
867 if (intel_crtc->config.adjusted_mode.flags & DRM_MODE_FLAG_PHSYNC)
868 temp |= TRANS_DDI_PHSYNC;
869
870 if (cpu_transcoder == TRANSCODER_EDP) {
871 switch (pipe) {
872 case PIPE_A:
873 /* On Haswell, can only use the always-on power well for
874 * eDP when not using the panel fitter, and when not
875 * using motion blur mitigation (which we don't
876 * support). */
877 if (IS_HASWELL(dev) && intel_crtc->config.pch_pfit.enabled)
878 temp |= TRANS_DDI_EDP_INPUT_A_ONOFF;
879 else
880 temp |= TRANS_DDI_EDP_INPUT_A_ON;
881 break;
882 case PIPE_B:
883 temp |= TRANS_DDI_EDP_INPUT_B_ONOFF;
884 break;
885 case PIPE_C:
886 temp |= TRANS_DDI_EDP_INPUT_C_ONOFF;
887 break;
888 default:
889 BUG();
890 break;
891 }
892 }
893
894 if (type == INTEL_OUTPUT_HDMI) {
895 struct intel_hdmi *intel_hdmi = enc_to_intel_hdmi(encoder);
896
897 if (intel_hdmi->has_hdmi_sink)
898 temp |= TRANS_DDI_MODE_SELECT_HDMI;
899 else
900 temp |= TRANS_DDI_MODE_SELECT_DVI;
901
902 } else if (type == INTEL_OUTPUT_ANALOG) {
903 temp |= TRANS_DDI_MODE_SELECT_FDI;
904 temp |= (intel_crtc->config.fdi_lanes - 1) << 1;
905
906 } else if (type == INTEL_OUTPUT_DISPLAYPORT ||
907 type == INTEL_OUTPUT_EDP) {
908 struct intel_dp *intel_dp = enc_to_intel_dp(encoder);
909
910 temp |= TRANS_DDI_MODE_SELECT_DP_SST;
911
912 temp |= DDI_PORT_WIDTH(intel_dp->lane_count);
913 } else {
914 WARN(1, "Invalid encoder type %d for pipe %c\n",
915 intel_encoder->type, pipe_name(pipe));
916 }
917
918 I915_WRITE(TRANS_DDI_FUNC_CTL(cpu_transcoder), temp);
919 }
920
921 void intel_ddi_disable_transcoder_func(struct drm_i915_private *dev_priv,
922 enum transcoder cpu_transcoder)
923 {
924 uint32_t reg = TRANS_DDI_FUNC_CTL(cpu_transcoder);
925 uint32_t val = I915_READ(reg);
926
927 val &= ~(TRANS_DDI_FUNC_ENABLE | TRANS_DDI_PORT_MASK);
928 val |= TRANS_DDI_PORT_NONE;
929 I915_WRITE(reg, val);
930 }
931
932 bool intel_ddi_connector_get_hw_state(struct intel_connector *intel_connector)
933 {
934 struct drm_device *dev = intel_connector->base.dev;
935 struct drm_i915_private *dev_priv = dev->dev_private;
936 struct intel_encoder *intel_encoder = intel_connector->encoder;
937 int type = intel_connector->base.connector_type;
938 enum port port = intel_ddi_get_encoder_port(intel_encoder);
939 enum pipe pipe = 0;
940 enum transcoder cpu_transcoder;
941 uint32_t tmp;
942
943 if (!intel_encoder->get_hw_state(intel_encoder, &pipe))
944 return false;
945
946 if (port == PORT_A)
947 cpu_transcoder = TRANSCODER_EDP;
948 else
949 cpu_transcoder = (enum transcoder) pipe;
950
951 tmp = I915_READ(TRANS_DDI_FUNC_CTL(cpu_transcoder));
952
953 switch (tmp & TRANS_DDI_MODE_SELECT_MASK) {
954 case TRANS_DDI_MODE_SELECT_HDMI:
955 case TRANS_DDI_MODE_SELECT_DVI:
956 return (type == DRM_MODE_CONNECTOR_HDMIA);
957
958 case TRANS_DDI_MODE_SELECT_DP_SST:
959 if (type == DRM_MODE_CONNECTOR_eDP)
960 return true;
961 case TRANS_DDI_MODE_SELECT_DP_MST:
962 return (type == DRM_MODE_CONNECTOR_DisplayPort);
963
964 case TRANS_DDI_MODE_SELECT_FDI:
965 return (type == DRM_MODE_CONNECTOR_VGA);
966
967 default:
968 return false;
969 }
970 }
971
972 bool intel_ddi_get_hw_state(struct intel_encoder *encoder,
973 enum pipe *pipe)
974 {
975 struct drm_device *dev = encoder->base.dev;
976 struct drm_i915_private *dev_priv = dev->dev_private;
977 enum port port = intel_ddi_get_encoder_port(encoder);
978 u32 tmp;
979 int i;
980
981 tmp = I915_READ(DDI_BUF_CTL(port));
982
983 if (!(tmp & DDI_BUF_CTL_ENABLE))
984 return false;
985
986 if (port == PORT_A) {
987 tmp = I915_READ(TRANS_DDI_FUNC_CTL(TRANSCODER_EDP));
988
989 switch (tmp & TRANS_DDI_EDP_INPUT_MASK) {
990 case TRANS_DDI_EDP_INPUT_A_ON:
991 case TRANS_DDI_EDP_INPUT_A_ONOFF:
992 *pipe = PIPE_A;
993 break;
994 case TRANS_DDI_EDP_INPUT_B_ONOFF:
995 *pipe = PIPE_B;
996 break;
997 case TRANS_DDI_EDP_INPUT_C_ONOFF:
998 *pipe = PIPE_C;
999 break;
1000 }
1001
1002 return true;
1003 } else {
1004 for (i = TRANSCODER_A; i <= TRANSCODER_C; i++) {
1005 tmp = I915_READ(TRANS_DDI_FUNC_CTL(i));
1006
1007 if ((tmp & TRANS_DDI_PORT_MASK)
1008 == TRANS_DDI_SELECT_PORT(port)) {
1009 *pipe = i;
1010 return true;
1011 }
1012 }
1013 }
1014
1015 DRM_DEBUG_KMS("No pipe for ddi port %c found\n", port_name(port));
1016
1017 return false;
1018 }
1019
1020 static uint32_t intel_ddi_get_crtc_pll(struct drm_i915_private *dev_priv,
1021 enum pipe pipe)
1022 {
1023 uint32_t temp, ret;
1024 enum port port = I915_MAX_PORTS;
1025 enum transcoder cpu_transcoder = intel_pipe_to_cpu_transcoder(dev_priv,
1026 pipe);
1027 int i;
1028
1029 if (cpu_transcoder == TRANSCODER_EDP) {
1030 port = PORT_A;
1031 } else {
1032 temp = I915_READ(TRANS_DDI_FUNC_CTL(cpu_transcoder));
1033 temp &= TRANS_DDI_PORT_MASK;
1034
1035 for (i = PORT_B; i <= PORT_E; i++)
1036 if (temp == TRANS_DDI_SELECT_PORT(i))
1037 port = i;
1038 }
1039
1040 if (port == I915_MAX_PORTS) {
1041 WARN(1, "Pipe %c enabled on an unknown port\n",
1042 pipe_name(pipe));
1043 ret = PORT_CLK_SEL_NONE;
1044 } else {
1045 ret = I915_READ(PORT_CLK_SEL(port));
1046 DRM_DEBUG_KMS("Pipe %c connected to port %c using clock "
1047 "0x%08x\n", pipe_name(pipe), port_name(port),
1048 ret);
1049 }
1050
1051 return ret;
1052 }
1053
1054 void intel_ddi_setup_hw_pll_state(struct drm_device *dev)
1055 {
1056 struct drm_i915_private *dev_priv = dev->dev_private;
1057 enum pipe pipe;
1058 struct intel_crtc *intel_crtc;
1059
1060 for_each_pipe(pipe) {
1061 intel_crtc =
1062 to_intel_crtc(dev_priv->pipe_to_crtc_mapping[pipe]);
1063
1064 if (!intel_crtc->active)
1065 continue;
1066
1067 intel_crtc->ddi_pll_sel = intel_ddi_get_crtc_pll(dev_priv,
1068 pipe);
1069
1070 switch (intel_crtc->ddi_pll_sel) {
1071 case PORT_CLK_SEL_SPLL:
1072 dev_priv->ddi_plls.spll_refcount++;
1073 break;
1074 case PORT_CLK_SEL_WRPLL1:
1075 dev_priv->ddi_plls.wrpll1_refcount++;
1076 break;
1077 case PORT_CLK_SEL_WRPLL2:
1078 dev_priv->ddi_plls.wrpll2_refcount++;
1079 break;
1080 }
1081 }
1082 }
1083
1084 void intel_ddi_enable_pipe_clock(struct intel_crtc *intel_crtc)
1085 {
1086 struct drm_crtc *crtc = &intel_crtc->base;
1087 struct drm_i915_private *dev_priv = crtc->dev->dev_private;
1088 struct intel_encoder *intel_encoder = intel_ddi_get_crtc_encoder(crtc);
1089 enum port port = intel_ddi_get_encoder_port(intel_encoder);
1090 enum transcoder cpu_transcoder = intel_crtc->config.cpu_transcoder;
1091
1092 if (cpu_transcoder != TRANSCODER_EDP)
1093 I915_WRITE(TRANS_CLK_SEL(cpu_transcoder),
1094 TRANS_CLK_SEL_PORT(port));
1095 }
1096
1097 void intel_ddi_disable_pipe_clock(struct intel_crtc *intel_crtc)
1098 {
1099 struct drm_i915_private *dev_priv = intel_crtc->base.dev->dev_private;
1100 enum transcoder cpu_transcoder = intel_crtc->config.cpu_transcoder;
1101
1102 if (cpu_transcoder != TRANSCODER_EDP)
1103 I915_WRITE(TRANS_CLK_SEL(cpu_transcoder),
1104 TRANS_CLK_SEL_DISABLED);
1105 }
1106
1107 static void intel_ddi_pre_enable(struct intel_encoder *intel_encoder)
1108 {
1109 struct drm_encoder *encoder = &intel_encoder->base;
1110 struct drm_crtc *crtc = encoder->crtc;
1111 struct drm_i915_private *dev_priv = encoder->dev->dev_private;
1112 struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
1113 enum port port = intel_ddi_get_encoder_port(intel_encoder);
1114 int type = intel_encoder->type;
1115
1116 if (type == INTEL_OUTPUT_EDP) {
1117 struct intel_dp *intel_dp = enc_to_intel_dp(encoder);
1118 ironlake_edp_panel_vdd_on(intel_dp);
1119 ironlake_edp_panel_on(intel_dp);
1120 ironlake_edp_panel_vdd_off(intel_dp, true);
1121 }
1122
1123 WARN_ON(intel_crtc->ddi_pll_sel == PORT_CLK_SEL_NONE);
1124 I915_WRITE(PORT_CLK_SEL(port), intel_crtc->ddi_pll_sel);
1125
1126 if (type == INTEL_OUTPUT_DISPLAYPORT || type == INTEL_OUTPUT_EDP) {
1127 struct intel_dp *intel_dp = enc_to_intel_dp(encoder);
1128
1129 intel_dp_sink_dpms(intel_dp, DRM_MODE_DPMS_ON);
1130 intel_dp_start_link_train(intel_dp);
1131 intel_dp_complete_link_train(intel_dp);
1132 if (port != PORT_A)
1133 intel_dp_stop_link_train(intel_dp);
1134 }
1135 }
1136
1137 static void intel_ddi_post_disable(struct intel_encoder *intel_encoder)
1138 {
1139 struct drm_encoder *encoder = &intel_encoder->base;
1140 struct drm_i915_private *dev_priv = encoder->dev->dev_private;
1141 enum port port = intel_ddi_get_encoder_port(intel_encoder);
1142 int type = intel_encoder->type;
1143 uint32_t val;
1144 bool wait = false;
1145
1146 val = I915_READ(DDI_BUF_CTL(port));
1147 if (val & DDI_BUF_CTL_ENABLE) {
1148 val &= ~DDI_BUF_CTL_ENABLE;
1149 I915_WRITE(DDI_BUF_CTL(port), val);
1150 wait = true;
1151 }
1152
1153 val = I915_READ(DP_TP_CTL(port));
1154 val &= ~(DP_TP_CTL_ENABLE | DP_TP_CTL_LINK_TRAIN_MASK);
1155 val |= DP_TP_CTL_LINK_TRAIN_PAT1;
1156 I915_WRITE(DP_TP_CTL(port), val);
1157
1158 if (wait)
1159 intel_wait_ddi_buf_idle(dev_priv, port);
1160
1161 if (type == INTEL_OUTPUT_EDP) {
1162 struct intel_dp *intel_dp = enc_to_intel_dp(encoder);
1163 ironlake_edp_panel_vdd_on(intel_dp);
1164 ironlake_edp_panel_off(intel_dp);
1165 }
1166
1167 I915_WRITE(PORT_CLK_SEL(port), PORT_CLK_SEL_NONE);
1168 }
1169
1170 static void intel_enable_ddi(struct intel_encoder *intel_encoder)
1171 {
1172 struct drm_encoder *encoder = &intel_encoder->base;
1173 struct drm_crtc *crtc = encoder->crtc;
1174 struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
1175 int pipe = intel_crtc->pipe;
1176 struct drm_device *dev = encoder->dev;
1177 struct drm_i915_private *dev_priv = dev->dev_private;
1178 enum port port = intel_ddi_get_encoder_port(intel_encoder);
1179 int type = intel_encoder->type;
1180 uint32_t tmp;
1181
1182 if (type == INTEL_OUTPUT_HDMI) {
1183 struct intel_digital_port *intel_dig_port =
1184 enc_to_dig_port(encoder);
1185
1186 /* In HDMI/DVI mode, the port width, and swing/emphasis values
1187 * are ignored so nothing special needs to be done besides
1188 * enabling the port.
1189 */
1190 I915_WRITE(DDI_BUF_CTL(port),
1191 intel_dig_port->saved_port_bits |
1192 DDI_BUF_CTL_ENABLE);
1193 } else if (type == INTEL_OUTPUT_EDP) {
1194 struct intel_dp *intel_dp = enc_to_intel_dp(encoder);
1195
1196 if (port == PORT_A)
1197 intel_dp_stop_link_train(intel_dp);
1198
1199 ironlake_edp_backlight_on(intel_dp);
1200 intel_edp_psr_enable(intel_dp);
1201 }
1202
1203 if (intel_crtc->eld_vld && type != INTEL_OUTPUT_EDP) {
1204 tmp = I915_READ(HSW_AUD_PIN_ELD_CP_VLD);
1205 tmp |= ((AUDIO_OUTPUT_ENABLE_A | AUDIO_ELD_VALID_A) << (pipe * 4));
1206 I915_WRITE(HSW_AUD_PIN_ELD_CP_VLD, tmp);
1207 }
1208 }
1209
1210 static void intel_disable_ddi(struct intel_encoder *intel_encoder)
1211 {
1212 struct drm_encoder *encoder = &intel_encoder->base;
1213 struct drm_crtc *crtc = encoder->crtc;
1214 struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
1215 int pipe = intel_crtc->pipe;
1216 int type = intel_encoder->type;
1217 struct drm_device *dev = encoder->dev;
1218 struct drm_i915_private *dev_priv = dev->dev_private;
1219 uint32_t tmp;
1220
1221 if (intel_crtc->eld_vld && type != INTEL_OUTPUT_EDP) {
1222 tmp = I915_READ(HSW_AUD_PIN_ELD_CP_VLD);
1223 tmp &= ~((AUDIO_OUTPUT_ENABLE_A | AUDIO_ELD_VALID_A) <<
1224 (pipe * 4));
1225 I915_WRITE(HSW_AUD_PIN_ELD_CP_VLD, tmp);
1226 }
1227
1228 if (type == INTEL_OUTPUT_EDP) {
1229 struct intel_dp *intel_dp = enc_to_intel_dp(encoder);
1230
1231 intel_edp_psr_disable(intel_dp);
1232 ironlake_edp_backlight_off(intel_dp);
1233 }
1234 }
1235
1236 int intel_ddi_get_cdclk_freq(struct drm_i915_private *dev_priv)
1237 {
1238 struct drm_device *dev = dev_priv->dev;
1239 uint32_t lcpll = I915_READ(LCPLL_CTL);
1240 uint32_t freq = lcpll & LCPLL_CLK_FREQ_MASK;
1241
1242 if (lcpll & LCPLL_CD_SOURCE_FCLK) {
1243 return 800000;
1244 } else if (I915_READ(HSW_FUSE_STRAP) & HSW_CDCLK_LIMIT) {
1245 return 450000;
1246 } else if (freq == LCPLL_CLK_FREQ_450) {
1247 return 450000;
1248 } else if (IS_HASWELL(dev)) {
1249 if (IS_ULT(dev))
1250 return 337500;
1251 else
1252 return 540000;
1253 } else {
1254 if (freq == LCPLL_CLK_FREQ_54O_BDW)
1255 return 540000;
1256 else if (freq == LCPLL_CLK_FREQ_337_5_BDW)
1257 return 337500;
1258 else
1259 return 675000;
1260 }
1261 }
1262
1263 void intel_ddi_pll_init(struct drm_device *dev)
1264 {
1265 struct drm_i915_private *dev_priv = dev->dev_private;
1266 uint32_t val = I915_READ(LCPLL_CTL);
1267
1268 /* The LCPLL register should be turned on by the BIOS. For now let's
1269 * just check its state and print errors in case something is wrong.
1270 * Don't even try to turn it on.
1271 */
1272
1273 DRM_DEBUG_KMS("CDCLK running at %dKHz\n",
1274 intel_ddi_get_cdclk_freq(dev_priv));
1275
1276 if (val & LCPLL_CD_SOURCE_FCLK)
1277 DRM_ERROR("CDCLK source is not LCPLL\n");
1278
1279 if (val & LCPLL_PLL_DISABLE)
1280 DRM_ERROR("LCPLL is disabled\n");
1281 }
1282
1283 void intel_ddi_prepare_link_retrain(struct drm_encoder *encoder)
1284 {
1285 struct intel_digital_port *intel_dig_port = enc_to_dig_port(encoder);
1286 struct intel_dp *intel_dp = &intel_dig_port->dp;
1287 struct drm_i915_private *dev_priv = encoder->dev->dev_private;
1288 enum port port = intel_dig_port->port;
1289 uint32_t val;
1290 bool wait = false;
1291
1292 if (I915_READ(DP_TP_CTL(port)) & DP_TP_CTL_ENABLE) {
1293 val = I915_READ(DDI_BUF_CTL(port));
1294 if (val & DDI_BUF_CTL_ENABLE) {
1295 val &= ~DDI_BUF_CTL_ENABLE;
1296 I915_WRITE(DDI_BUF_CTL(port), val);
1297 wait = true;
1298 }
1299
1300 val = I915_READ(DP_TP_CTL(port));
1301 val &= ~(DP_TP_CTL_ENABLE | DP_TP_CTL_LINK_TRAIN_MASK);
1302 val |= DP_TP_CTL_LINK_TRAIN_PAT1;
1303 I915_WRITE(DP_TP_CTL(port), val);
1304 POSTING_READ(DP_TP_CTL(port));
1305
1306 if (wait)
1307 intel_wait_ddi_buf_idle(dev_priv, port);
1308 }
1309
1310 val = DP_TP_CTL_ENABLE | DP_TP_CTL_MODE_SST |
1311 DP_TP_CTL_LINK_TRAIN_PAT1 | DP_TP_CTL_SCRAMBLE_DISABLE;
1312 if (drm_dp_enhanced_frame_cap(intel_dp->dpcd))
1313 val |= DP_TP_CTL_ENHANCED_FRAME_ENABLE;
1314 I915_WRITE(DP_TP_CTL(port), val);
1315 POSTING_READ(DP_TP_CTL(port));
1316
1317 intel_dp->DP |= DDI_BUF_CTL_ENABLE;
1318 I915_WRITE(DDI_BUF_CTL(port), intel_dp->DP);
1319 POSTING_READ(DDI_BUF_CTL(port));
1320
1321 udelay(600);
1322 }
1323
1324 void intel_ddi_fdi_disable(struct drm_crtc *crtc)
1325 {
1326 struct drm_i915_private *dev_priv = crtc->dev->dev_private;
1327 struct intel_encoder *intel_encoder = intel_ddi_get_crtc_encoder(crtc);
1328 uint32_t val;
1329
1330 intel_ddi_post_disable(intel_encoder);
1331
1332 val = I915_READ(_FDI_RXA_CTL);
1333 val &= ~FDI_RX_ENABLE;
1334 I915_WRITE(_FDI_RXA_CTL, val);
1335
1336 val = I915_READ(_FDI_RXA_MISC);
1337 val &= ~(FDI_RX_PWRDN_LANE1_MASK | FDI_RX_PWRDN_LANE0_MASK);
1338 val |= FDI_RX_PWRDN_LANE1_VAL(2) | FDI_RX_PWRDN_LANE0_VAL(2);
1339 I915_WRITE(_FDI_RXA_MISC, val);
1340
1341 val = I915_READ(_FDI_RXA_CTL);
1342 val &= ~FDI_PCDCLK;
1343 I915_WRITE(_FDI_RXA_CTL, val);
1344
1345 val = I915_READ(_FDI_RXA_CTL);
1346 val &= ~FDI_RX_PLL_ENABLE;
1347 I915_WRITE(_FDI_RXA_CTL, val);
1348 }
1349
1350 static void intel_ddi_hot_plug(struct intel_encoder *intel_encoder)
1351 {
1352 struct intel_dp *intel_dp = enc_to_intel_dp(&intel_encoder->base);
1353 int type = intel_encoder->type;
1354
1355 if (type == INTEL_OUTPUT_DISPLAYPORT || type == INTEL_OUTPUT_EDP)
1356 intel_dp_check_link_status(intel_dp);
1357 }
1358
1359 void intel_ddi_get_config(struct intel_encoder *encoder,
1360 struct intel_crtc_config *pipe_config)
1361 {
1362 struct drm_i915_private *dev_priv = encoder->base.dev->dev_private;
1363 struct intel_crtc *intel_crtc = to_intel_crtc(encoder->base.crtc);
1364 enum transcoder cpu_transcoder = intel_crtc->config.cpu_transcoder;
1365 u32 temp, flags = 0;
1366
1367 temp = I915_READ(TRANS_DDI_FUNC_CTL(cpu_transcoder));
1368 if (temp & TRANS_DDI_PHSYNC)
1369 flags |= DRM_MODE_FLAG_PHSYNC;
1370 else
1371 flags |= DRM_MODE_FLAG_NHSYNC;
1372 if (temp & TRANS_DDI_PVSYNC)
1373 flags |= DRM_MODE_FLAG_PVSYNC;
1374 else
1375 flags |= DRM_MODE_FLAG_NVSYNC;
1376
1377 pipe_config->adjusted_mode.flags |= flags;
1378
1379 switch (temp & TRANS_DDI_BPC_MASK) {
1380 case TRANS_DDI_BPC_6:
1381 pipe_config->pipe_bpp = 18;
1382 break;
1383 case TRANS_DDI_BPC_8:
1384 pipe_config->pipe_bpp = 24;
1385 break;
1386 case TRANS_DDI_BPC_10:
1387 pipe_config->pipe_bpp = 30;
1388 break;
1389 case TRANS_DDI_BPC_12:
1390 pipe_config->pipe_bpp = 36;
1391 break;
1392 default:
1393 break;
1394 }
1395
1396 switch (temp & TRANS_DDI_MODE_SELECT_MASK) {
1397 case TRANS_DDI_MODE_SELECT_HDMI:
1398 case TRANS_DDI_MODE_SELECT_DVI:
1399 case TRANS_DDI_MODE_SELECT_FDI:
1400 break;
1401 case TRANS_DDI_MODE_SELECT_DP_SST:
1402 case TRANS_DDI_MODE_SELECT_DP_MST:
1403 pipe_config->has_dp_encoder = true;
1404 intel_dp_get_m_n(intel_crtc, pipe_config);
1405 break;
1406 default:
1407 break;
1408 }
1409 }
1410
1411 static void intel_ddi_destroy(struct drm_encoder *encoder)
1412 {
1413 /* HDMI has nothing special to destroy, so we can go with this. */
1414 intel_dp_encoder_destroy(encoder);
1415 }
1416
1417 static bool intel_ddi_compute_config(struct intel_encoder *encoder,
1418 struct intel_crtc_config *pipe_config)
1419 {
1420 int type = encoder->type;
1421 int port = intel_ddi_get_encoder_port(encoder);
1422
1423 WARN(type == INTEL_OUTPUT_UNKNOWN, "compute_config() on unknown output!\n");
1424
1425 if (port == PORT_A)
1426 pipe_config->cpu_transcoder = TRANSCODER_EDP;
1427
1428 if (type == INTEL_OUTPUT_HDMI)
1429 return intel_hdmi_compute_config(encoder, pipe_config);
1430 else
1431 return intel_dp_compute_config(encoder, pipe_config);
1432 }
1433
1434 static const struct drm_encoder_funcs intel_ddi_funcs = {
1435 .destroy = intel_ddi_destroy,
1436 };
1437
1438 static struct intel_connector *
1439 intel_ddi_init_dp_connector(struct intel_digital_port *intel_dig_port)
1440 {
1441 struct intel_connector *connector;
1442 enum port port = intel_dig_port->port;
1443
1444 connector = kzalloc(sizeof(*connector), GFP_KERNEL);
1445 if (!connector)
1446 return NULL;
1447
1448 intel_dig_port->dp.output_reg = DDI_BUF_CTL(port);
1449 if (!intel_dp_init_connector(intel_dig_port, connector)) {
1450 kfree(connector);
1451 return NULL;
1452 }
1453
1454 return connector;
1455 }
1456
1457 static struct intel_connector *
1458 intel_ddi_init_hdmi_connector(struct intel_digital_port *intel_dig_port)
1459 {
1460 struct intel_connector *connector;
1461 enum port port = intel_dig_port->port;
1462
1463 connector = kzalloc(sizeof(*connector), GFP_KERNEL);
1464 if (!connector)
1465 return NULL;
1466
1467 intel_dig_port->hdmi.hdmi_reg = DDI_BUF_CTL(port);
1468 intel_hdmi_init_connector(intel_dig_port, connector);
1469
1470 return connector;
1471 }
1472
1473 void intel_ddi_init(struct drm_device *dev, enum port port)
1474 {
1475 struct drm_i915_private *dev_priv = dev->dev_private;
1476 struct intel_digital_port *intel_dig_port;
1477 struct intel_encoder *intel_encoder;
1478 struct drm_encoder *encoder;
1479 struct intel_connector *hdmi_connector = NULL;
1480 struct intel_connector *dp_connector = NULL;
1481 bool init_hdmi, init_dp;
1482
1483 init_hdmi = (dev_priv->vbt.ddi_port_info[port].supports_dvi ||
1484 dev_priv->vbt.ddi_port_info[port].supports_hdmi);
1485 init_dp = dev_priv->vbt.ddi_port_info[port].supports_dp;
1486 if (!init_dp && !init_hdmi) {
1487 DRM_DEBUG_KMS("VBT says port %c is not DVI/HDMI/DP compatible\n",
1488 port_name(port));
1489 init_hdmi = true;
1490 init_dp = true;
1491 }
1492
1493 intel_dig_port = kzalloc(sizeof(*intel_dig_port), GFP_KERNEL);
1494 if (!intel_dig_port)
1495 return;
1496
1497 intel_encoder = &intel_dig_port->base;
1498 encoder = &intel_encoder->base;
1499
1500 drm_encoder_init(dev, encoder, &intel_ddi_funcs,
1501 DRM_MODE_ENCODER_TMDS);
1502
1503 intel_encoder->compute_config = intel_ddi_compute_config;
1504 intel_encoder->mode_set = intel_ddi_mode_set;
1505 intel_encoder->enable = intel_enable_ddi;
1506 intel_encoder->pre_enable = intel_ddi_pre_enable;
1507 intel_encoder->disable = intel_disable_ddi;
1508 intel_encoder->post_disable = intel_ddi_post_disable;
1509 intel_encoder->get_hw_state = intel_ddi_get_hw_state;
1510 intel_encoder->get_config = intel_ddi_get_config;
1511
1512 intel_dig_port->port = port;
1513 intel_dig_port->saved_port_bits = I915_READ(DDI_BUF_CTL(port)) &
1514 (DDI_BUF_PORT_REVERSAL |
1515 DDI_A_4_LANES);
1516
1517 intel_encoder->type = INTEL_OUTPUT_UNKNOWN;
1518 intel_encoder->crtc_mask = (1 << 0) | (1 << 1) | (1 << 2);
1519 intel_encoder->cloneable = false;
1520 intel_encoder->hot_plug = intel_ddi_hot_plug;
1521
1522 if (init_dp)
1523 dp_connector = intel_ddi_init_dp_connector(intel_dig_port);
1524
1525 /* In theory we don't need the encoder->type check, but leave it just in
1526 * case we have some really bad VBTs... */
1527 if (intel_encoder->type != INTEL_OUTPUT_EDP && init_hdmi)
1528 hdmi_connector = intel_ddi_init_hdmi_connector(intel_dig_port);
1529
1530 if (!dp_connector && !hdmi_connector) {
1531 drm_encoder_cleanup(encoder);
1532 kfree(intel_dig_port);
1533 }
1534 }
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