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1/*
2 * Copyright © 2008 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 * Keith Packard <keithp@keithp.com>
25 *
26 */
27
28#include <linux/export.h>
29#include <linux/i2c.h>
30#include <linux/notifier.h>
31#include <linux/reboot.h>
32#include <linux/slab.h>
33#include <linux/types.h>
34
35#include <asm/byteorder.h>
36
37#include <drm/drm_atomic_helper.h>
38#include <drm/drm_crtc.h>
39#include <drm/drm_dp_helper.h>
40#include <drm/drm_edid.h>
41#include <drm/drm_hdcp.h>
42#include <drm/drm_probe_helper.h>
43#include <drm/i915_drm.h>
44
45#include "i915_debugfs.h"
46#include "i915_drv.h"
47#include "i915_trace.h"
48#include "intel_atomic.h"
49#include "intel_audio.h"
50#include "intel_connector.h"
51#include "intel_ddi.h"
52#include "intel_display_types.h"
53#include "intel_dp.h"
54#include "intel_dp_link_training.h"
55#include "intel_dp_mst.h"
56#include "intel_dpio_phy.h"
57#include "intel_fifo_underrun.h"
58#include "intel_hdcp.h"
59#include "intel_hdmi.h"
60#include "intel_hotplug.h"
61#include "intel_lspcon.h"
62#include "intel_lvds.h"
63#include "intel_panel.h"
64#include "intel_psr.h"
65#include "intel_sideband.h"
66#include "intel_tc.h"
67#include "intel_vdsc.h"
68
69#define DP_DPRX_ESI_LEN 14
70
71/* DP DSC small joiner has 2 FIFOs each of 640 x 6 bytes */
72#define DP_DSC_MAX_SMALL_JOINER_RAM_BUFFER 61440
73#define DP_DSC_MIN_SUPPORTED_BPC 8
74#define DP_DSC_MAX_SUPPORTED_BPC 10
75
76/* DP DSC throughput values used for slice count calculations KPixels/s */
77#define DP_DSC_PEAK_PIXEL_RATE 2720000
78#define DP_DSC_MAX_ENC_THROUGHPUT_0 340000
79#define DP_DSC_MAX_ENC_THROUGHPUT_1 400000
80
81/* DP DSC FEC Overhead factor = 1/(0.972261) */
82#define DP_DSC_FEC_OVERHEAD_FACTOR 972261
83
84/* Compliance test status bits */
85#define INTEL_DP_RESOLUTION_SHIFT_MASK 0
86#define INTEL_DP_RESOLUTION_PREFERRED (1 << INTEL_DP_RESOLUTION_SHIFT_MASK)
87#define INTEL_DP_RESOLUTION_STANDARD (2 << INTEL_DP_RESOLUTION_SHIFT_MASK)
88#define INTEL_DP_RESOLUTION_FAILSAFE (3 << INTEL_DP_RESOLUTION_SHIFT_MASK)
89
90struct dp_link_dpll {
91 int clock;
92 struct dpll dpll;
93};
94
95static const struct dp_link_dpll g4x_dpll[] = {
96 { 162000,
97 { .p1 = 2, .p2 = 10, .n = 2, .m1 = 23, .m2 = 8 } },
98 { 270000,
99 { .p1 = 1, .p2 = 10, .n = 1, .m1 = 14, .m2 = 2 } }
100};
101
102static const struct dp_link_dpll pch_dpll[] = {
103 { 162000,
104 { .p1 = 2, .p2 = 10, .n = 1, .m1 = 12, .m2 = 9 } },
105 { 270000,
106 { .p1 = 1, .p2 = 10, .n = 2, .m1 = 14, .m2 = 8 } }
107};
108
109static const struct dp_link_dpll vlv_dpll[] = {
110 { 162000,
111 { .p1 = 3, .p2 = 2, .n = 5, .m1 = 3, .m2 = 81 } },
112 { 270000,
113 { .p1 = 2, .p2 = 2, .n = 1, .m1 = 2, .m2 = 27 } }
114};
115
116/*
117 * CHV supports eDP 1.4 that have more link rates.
118 * Below only provides the fixed rate but exclude variable rate.
119 */
120static const struct dp_link_dpll chv_dpll[] = {
121 /*
122 * CHV requires to program fractional division for m2.
123 * m2 is stored in fixed point format using formula below
124 * (m2_int << 22) | m2_fraction
125 */
126 { 162000, /* m2_int = 32, m2_fraction = 1677722 */
127 { .p1 = 4, .p2 = 2, .n = 1, .m1 = 2, .m2 = 0x819999a } },
128 { 270000, /* m2_int = 27, m2_fraction = 0 */
129 { .p1 = 4, .p2 = 1, .n = 1, .m1 = 2, .m2 = 0x6c00000 } },
130};
131
132/* Constants for DP DSC configurations */
133static const u8 valid_dsc_bpp[] = {6, 8, 10, 12, 15};
134
135/* With Single pipe configuration, HW is capable of supporting maximum
136 * of 4 slices per line.
137 */
138static const u8 valid_dsc_slicecount[] = {1, 2, 4};
139
140/**
141 * intel_dp_is_edp - is the given port attached to an eDP panel (either CPU or PCH)
142 * @intel_dp: DP struct
143 *
144 * If a CPU or PCH DP output is attached to an eDP panel, this function
145 * will return true, and false otherwise.
146 */
147bool intel_dp_is_edp(struct intel_dp *intel_dp)
148{
149 struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp);
150
151 return intel_dig_port->base.type == INTEL_OUTPUT_EDP;
152}
153
154static struct intel_dp *intel_attached_dp(struct drm_connector *connector)
155{
156 return enc_to_intel_dp(&intel_attached_encoder(connector)->base);
157}
158
159static void intel_dp_link_down(struct intel_encoder *encoder,
160 const struct intel_crtc_state *old_crtc_state);
161static bool edp_panel_vdd_on(struct intel_dp *intel_dp);
162static void edp_panel_vdd_off(struct intel_dp *intel_dp, bool sync);
163static void vlv_init_panel_power_sequencer(struct intel_encoder *encoder,
164 const struct intel_crtc_state *crtc_state);
165static void vlv_steal_power_sequencer(struct drm_i915_private *dev_priv,
166 enum pipe pipe);
167static void intel_dp_unset_edid(struct intel_dp *intel_dp);
168
169/* update sink rates from dpcd */
170static void intel_dp_set_sink_rates(struct intel_dp *intel_dp)
171{
172 static const int dp_rates[] = {
173 162000, 270000, 540000, 810000
174 };
175 int i, max_rate;
176
177 max_rate = drm_dp_bw_code_to_link_rate(intel_dp->dpcd[DP_MAX_LINK_RATE]);
178
179 for (i = 0; i < ARRAY_SIZE(dp_rates); i++) {
180 if (dp_rates[i] > max_rate)
181 break;
182 intel_dp->sink_rates[i] = dp_rates[i];
183 }
184
185 intel_dp->num_sink_rates = i;
186}
187
188/* Get length of rates array potentially limited by max_rate. */
189static int intel_dp_rate_limit_len(const int *rates, int len, int max_rate)
190{
191 int i;
192
193 /* Limit results by potentially reduced max rate */
194 for (i = 0; i < len; i++) {
195 if (rates[len - i - 1] <= max_rate)
196 return len - i;
197 }
198
199 return 0;
200}
201
202/* Get length of common rates array potentially limited by max_rate. */
203static int intel_dp_common_len_rate_limit(const struct intel_dp *intel_dp,
204 int max_rate)
205{
206 return intel_dp_rate_limit_len(intel_dp->common_rates,
207 intel_dp->num_common_rates, max_rate);
208}
209
210/* Theoretical max between source and sink */
211static int intel_dp_max_common_rate(struct intel_dp *intel_dp)
212{
213 return intel_dp->common_rates[intel_dp->num_common_rates - 1];
214}
215
216/* Theoretical max between source and sink */
217static int intel_dp_max_common_lane_count(struct intel_dp *intel_dp)
218{
219 struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp);
220 int source_max = intel_dig_port->max_lanes;
221 int sink_max = drm_dp_max_lane_count(intel_dp->dpcd);
222 int fia_max = intel_tc_port_fia_max_lane_count(intel_dig_port);
223
224 return min3(source_max, sink_max, fia_max);
225}
226
227int intel_dp_max_lane_count(struct intel_dp *intel_dp)
228{
229 return intel_dp->max_link_lane_count;
230}
231
232int
233intel_dp_link_required(int pixel_clock, int bpp)
234{
235 /* pixel_clock is in kHz, divide bpp by 8 for bit to Byte conversion */
236 return DIV_ROUND_UP(pixel_clock * bpp, 8);
237}
238
239int
240intel_dp_max_data_rate(int max_link_clock, int max_lanes)
241{
242 /* max_link_clock is the link symbol clock (LS_Clk) in kHz and not the
243 * link rate that is generally expressed in Gbps. Since, 8 bits of data
244 * is transmitted every LS_Clk per lane, there is no need to account for
245 * the channel encoding that is done in the PHY layer here.
246 */
247
248 return max_link_clock * max_lanes;
249}
250
251static int
252intel_dp_downstream_max_dotclock(struct intel_dp *intel_dp)
253{
254 struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp);
255 struct intel_encoder *encoder = &intel_dig_port->base;
256 struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
257 int max_dotclk = dev_priv->max_dotclk_freq;
258 int ds_max_dotclk;
259
260 int type = intel_dp->downstream_ports[0] & DP_DS_PORT_TYPE_MASK;
261
262 if (type != DP_DS_PORT_TYPE_VGA)
263 return max_dotclk;
264
265 ds_max_dotclk = drm_dp_downstream_max_clock(intel_dp->dpcd,
266 intel_dp->downstream_ports);
267
268 if (ds_max_dotclk != 0)
269 max_dotclk = min(max_dotclk, ds_max_dotclk);
270
271 return max_dotclk;
272}
273
274static int cnl_max_source_rate(struct intel_dp *intel_dp)
275{
276 struct intel_digital_port *dig_port = dp_to_dig_port(intel_dp);
277 struct drm_i915_private *dev_priv = to_i915(dig_port->base.base.dev);
278 enum port port = dig_port->base.port;
279
280 u32 voltage = I915_READ(CNL_PORT_COMP_DW3) & VOLTAGE_INFO_MASK;
281
282 /* Low voltage SKUs are limited to max of 5.4G */
283 if (voltage == VOLTAGE_INFO_0_85V)
284 return 540000;
285
286 /* For this SKU 8.1G is supported in all ports */
287 if (IS_CNL_WITH_PORT_F(dev_priv))
288 return 810000;
289
290 /* For other SKUs, max rate on ports A and D is 5.4G */
291 if (port == PORT_A || port == PORT_D)
292 return 540000;
293
294 return 810000;
295}
296
297static int icl_max_source_rate(struct intel_dp *intel_dp)
298{
299 struct intel_digital_port *dig_port = dp_to_dig_port(intel_dp);
300 struct drm_i915_private *dev_priv = to_i915(dig_port->base.base.dev);
301 enum phy phy = intel_port_to_phy(dev_priv, dig_port->base.port);
302
303 if (intel_phy_is_combo(dev_priv, phy) &&
304 !IS_ELKHARTLAKE(dev_priv) &&
305 !intel_dp_is_edp(intel_dp))
306 return 540000;
307
308 return 810000;
309}
310
311static void
312intel_dp_set_source_rates(struct intel_dp *intel_dp)
313{
314 /* The values must be in increasing order */
315 static const int cnl_rates[] = {
316 162000, 216000, 270000, 324000, 432000, 540000, 648000, 810000
317 };
318 static const int bxt_rates[] = {
319 162000, 216000, 243000, 270000, 324000, 432000, 540000
320 };
321 static const int skl_rates[] = {
322 162000, 216000, 270000, 324000, 432000, 540000
323 };
324 static const int hsw_rates[] = {
325 162000, 270000, 540000
326 };
327 static const int g4x_rates[] = {
328 162000, 270000
329 };
330 struct intel_digital_port *dig_port = dp_to_dig_port(intel_dp);
331 struct drm_i915_private *dev_priv = to_i915(dig_port->base.base.dev);
332 const struct ddi_vbt_port_info *info =
333 &dev_priv->vbt.ddi_port_info[dig_port->base.port];
334 const int *source_rates;
335 int size, max_rate = 0, vbt_max_rate = info->dp_max_link_rate;
336
337 /* This should only be done once */
338 WARN_ON(intel_dp->source_rates || intel_dp->num_source_rates);
339
340 if (INTEL_GEN(dev_priv) >= 10) {
341 source_rates = cnl_rates;
342 size = ARRAY_SIZE(cnl_rates);
343 if (IS_GEN(dev_priv, 10))
344 max_rate = cnl_max_source_rate(intel_dp);
345 else
346 max_rate = icl_max_source_rate(intel_dp);
347 } else if (IS_GEN9_LP(dev_priv)) {
348 source_rates = bxt_rates;
349 size = ARRAY_SIZE(bxt_rates);
350 } else if (IS_GEN9_BC(dev_priv)) {
351 source_rates = skl_rates;
352 size = ARRAY_SIZE(skl_rates);
353 } else if ((IS_HASWELL(dev_priv) && !IS_HSW_ULX(dev_priv)) ||
354 IS_BROADWELL(dev_priv)) {
355 source_rates = hsw_rates;
356 size = ARRAY_SIZE(hsw_rates);
357 } else {
358 source_rates = g4x_rates;
359 size = ARRAY_SIZE(g4x_rates);
360 }
361
362 if (max_rate && vbt_max_rate)
363 max_rate = min(max_rate, vbt_max_rate);
364 else if (vbt_max_rate)
365 max_rate = vbt_max_rate;
366
367 if (max_rate)
368 size = intel_dp_rate_limit_len(source_rates, size, max_rate);
369
370 intel_dp->source_rates = source_rates;
371 intel_dp->num_source_rates = size;
372}
373
374static int intersect_rates(const int *source_rates, int source_len,
375 const int *sink_rates, int sink_len,
376 int *common_rates)
377{
378 int i = 0, j = 0, k = 0;
379
380 while (i < source_len && j < sink_len) {
381 if (source_rates[i] == sink_rates[j]) {
382 if (WARN_ON(k >= DP_MAX_SUPPORTED_RATES))
383 return k;
384 common_rates[k] = source_rates[i];
385 ++k;
386 ++i;
387 ++j;
388 } else if (source_rates[i] < sink_rates[j]) {
389 ++i;
390 } else {
391 ++j;
392 }
393 }
394 return k;
395}
396
397/* return index of rate in rates array, or -1 if not found */
398static int intel_dp_rate_index(const int *rates, int len, int rate)
399{
400 int i;
401
402 for (i = 0; i < len; i++)
403 if (rate == rates[i])
404 return i;
405
406 return -1;
407}
408
409static void intel_dp_set_common_rates(struct intel_dp *intel_dp)
410{
411 WARN_ON(!intel_dp->num_source_rates || !intel_dp->num_sink_rates);
412
413 intel_dp->num_common_rates = intersect_rates(intel_dp->source_rates,
414 intel_dp->num_source_rates,
415 intel_dp->sink_rates,
416 intel_dp->num_sink_rates,
417 intel_dp->common_rates);
418
419 /* Paranoia, there should always be something in common. */
420 if (WARN_ON(intel_dp->num_common_rates == 0)) {
421 intel_dp->common_rates[0] = 162000;
422 intel_dp->num_common_rates = 1;
423 }
424}
425
426static bool intel_dp_link_params_valid(struct intel_dp *intel_dp, int link_rate,
427 u8 lane_count)
428{
429 /*
430 * FIXME: we need to synchronize the current link parameters with
431 * hardware readout. Currently fast link training doesn't work on
432 * boot-up.
433 */
434 if (link_rate == 0 ||
435 link_rate > intel_dp->max_link_rate)
436 return false;
437
438 if (lane_count == 0 ||
439 lane_count > intel_dp_max_lane_count(intel_dp))
440 return false;
441
442 return true;
443}
444
445static bool intel_dp_can_link_train_fallback_for_edp(struct intel_dp *intel_dp,
446 int link_rate,
447 u8 lane_count)
448{
449 const struct drm_display_mode *fixed_mode =
450 intel_dp->attached_connector->panel.fixed_mode;
451 int mode_rate, max_rate;
452
453 mode_rate = intel_dp_link_required(fixed_mode->clock, 18);
454 max_rate = intel_dp_max_data_rate(link_rate, lane_count);
455 if (mode_rate > max_rate)
456 return false;
457
458 return true;
459}
460
461int intel_dp_get_link_train_fallback_values(struct intel_dp *intel_dp,
462 int link_rate, u8 lane_count)
463{
464 int index;
465
466 index = intel_dp_rate_index(intel_dp->common_rates,
467 intel_dp->num_common_rates,
468 link_rate);
469 if (index > 0) {
470 if (intel_dp_is_edp(intel_dp) &&
471 !intel_dp_can_link_train_fallback_for_edp(intel_dp,
472 intel_dp->common_rates[index - 1],
473 lane_count)) {
474 DRM_DEBUG_KMS("Retrying Link training for eDP with same parameters\n");
475 return 0;
476 }
477 intel_dp->max_link_rate = intel_dp->common_rates[index - 1];
478 intel_dp->max_link_lane_count = lane_count;
479 } else if (lane_count > 1) {
480 if (intel_dp_is_edp(intel_dp) &&
481 !intel_dp_can_link_train_fallback_for_edp(intel_dp,
482 intel_dp_max_common_rate(intel_dp),
483 lane_count >> 1)) {
484 DRM_DEBUG_KMS("Retrying Link training for eDP with same parameters\n");
485 return 0;
486 }
487 intel_dp->max_link_rate = intel_dp_max_common_rate(intel_dp);
488 intel_dp->max_link_lane_count = lane_count >> 1;
489 } else {
490 DRM_ERROR("Link Training Unsuccessful\n");
491 return -1;
492 }
493
494 return 0;
495}
496
497u32 intel_dp_mode_to_fec_clock(u32 mode_clock)
498{
499 return div_u64(mul_u32_u32(mode_clock, 1000000U),
500 DP_DSC_FEC_OVERHEAD_FACTOR);
501}
502
503static u16 intel_dp_dsc_get_output_bpp(u32 link_clock, u32 lane_count,
504 u32 mode_clock, u32 mode_hdisplay)
505{
506 u32 bits_per_pixel, max_bpp_small_joiner_ram;
507 int i;
508
509 /*
510 * Available Link Bandwidth(Kbits/sec) = (NumberOfLanes)*
511 * (LinkSymbolClock)* 8 * (TimeSlotsPerMTP)
512 * for SST -> TimeSlotsPerMTP is 1,
513 * for MST -> TimeSlotsPerMTP has to be calculated
514 */
515 bits_per_pixel = (link_clock * lane_count * 8) /
516 intel_dp_mode_to_fec_clock(mode_clock);
517 DRM_DEBUG_KMS("Max link bpp: %u\n", bits_per_pixel);
518
519 /* Small Joiner Check: output bpp <= joiner RAM (bits) / Horiz. width */
520 max_bpp_small_joiner_ram = DP_DSC_MAX_SMALL_JOINER_RAM_BUFFER / mode_hdisplay;
521 DRM_DEBUG_KMS("Max small joiner bpp: %u\n", max_bpp_small_joiner_ram);
522
523 /*
524 * Greatest allowed DSC BPP = MIN (output BPP from available Link BW
525 * check, output bpp from small joiner RAM check)
526 */
527 bits_per_pixel = min(bits_per_pixel, max_bpp_small_joiner_ram);
528
529 /* Error out if the max bpp is less than smallest allowed valid bpp */
530 if (bits_per_pixel < valid_dsc_bpp[0]) {
531 DRM_DEBUG_KMS("Unsupported BPP %u, min %u\n",
532 bits_per_pixel, valid_dsc_bpp[0]);
533 return 0;
534 }
535
536 /* Find the nearest match in the array of known BPPs from VESA */
537 for (i = 0; i < ARRAY_SIZE(valid_dsc_bpp) - 1; i++) {
538 if (bits_per_pixel < valid_dsc_bpp[i + 1])
539 break;
540 }
541 bits_per_pixel = valid_dsc_bpp[i];
542
543 /*
544 * Compressed BPP in U6.4 format so multiply by 16, for Gen 11,
545 * fractional part is 0
546 */
547 return bits_per_pixel << 4;
548}
549
550static u8 intel_dp_dsc_get_slice_count(struct intel_dp *intel_dp,
551 int mode_clock, int mode_hdisplay)
552{
553 u8 min_slice_count, i;
554 int max_slice_width;
555
556 if (mode_clock <= DP_DSC_PEAK_PIXEL_RATE)
557 min_slice_count = DIV_ROUND_UP(mode_clock,
558 DP_DSC_MAX_ENC_THROUGHPUT_0);
559 else
560 min_slice_count = DIV_ROUND_UP(mode_clock,
561 DP_DSC_MAX_ENC_THROUGHPUT_1);
562
563 max_slice_width = drm_dp_dsc_sink_max_slice_width(intel_dp->dsc_dpcd);
564 if (max_slice_width < DP_DSC_MIN_SLICE_WIDTH_VALUE) {
565 DRM_DEBUG_KMS("Unsupported slice width %d by DP DSC Sink device\n",
566 max_slice_width);
567 return 0;
568 }
569 /* Also take into account max slice width */
570 min_slice_count = min_t(u8, min_slice_count,
571 DIV_ROUND_UP(mode_hdisplay,
572 max_slice_width));
573
574 /* Find the closest match to the valid slice count values */
575 for (i = 0; i < ARRAY_SIZE(valid_dsc_slicecount); i++) {
576 if (valid_dsc_slicecount[i] >
577 drm_dp_dsc_sink_max_slice_count(intel_dp->dsc_dpcd,
578 false))
579 break;
580 if (min_slice_count <= valid_dsc_slicecount[i])
581 return valid_dsc_slicecount[i];
582 }
583
584 DRM_DEBUG_KMS("Unsupported Slice Count %d\n", min_slice_count);
585 return 0;
586}
587
588static enum drm_mode_status
589intel_dp_mode_valid(struct drm_connector *connector,
590 struct drm_display_mode *mode)
591{
592 struct intel_dp *intel_dp = intel_attached_dp(connector);
593 struct intel_connector *intel_connector = to_intel_connector(connector);
594 struct drm_display_mode *fixed_mode = intel_connector->panel.fixed_mode;
595 struct drm_i915_private *dev_priv = to_i915(connector->dev);
596 int target_clock = mode->clock;
597 int max_rate, mode_rate, max_lanes, max_link_clock;
598 int max_dotclk;
599 u16 dsc_max_output_bpp = 0;
600 u8 dsc_slice_count = 0;
601
602 if (mode->flags & DRM_MODE_FLAG_DBLSCAN)
603 return MODE_NO_DBLESCAN;
604
605 max_dotclk = intel_dp_downstream_max_dotclock(intel_dp);
606
607 if (intel_dp_is_edp(intel_dp) && fixed_mode) {
608 if (mode->hdisplay > fixed_mode->hdisplay)
609 return MODE_PANEL;
610
611 if (mode->vdisplay > fixed_mode->vdisplay)
612 return MODE_PANEL;
613
614 target_clock = fixed_mode->clock;
615 }
616
617 max_link_clock = intel_dp_max_link_rate(intel_dp);
618 max_lanes = intel_dp_max_lane_count(intel_dp);
619
620 max_rate = intel_dp_max_data_rate(max_link_clock, max_lanes);
621 mode_rate = intel_dp_link_required(target_clock, 18);
622
623 /*
624 * Output bpp is stored in 6.4 format so right shift by 4 to get the
625 * integer value since we support only integer values of bpp.
626 */
627 if ((INTEL_GEN(dev_priv) >= 10 || IS_GEMINILAKE(dev_priv)) &&
628 drm_dp_sink_supports_dsc(intel_dp->dsc_dpcd)) {
629 if (intel_dp_is_edp(intel_dp)) {
630 dsc_max_output_bpp =
631 drm_edp_dsc_sink_output_bpp(intel_dp->dsc_dpcd) >> 4;
632 dsc_slice_count =
633 drm_dp_dsc_sink_max_slice_count(intel_dp->dsc_dpcd,
634 true);
635 } else if (drm_dp_sink_supports_fec(intel_dp->fec_capable)) {
636 dsc_max_output_bpp =
637 intel_dp_dsc_get_output_bpp(max_link_clock,
638 max_lanes,
639 target_clock,
640 mode->hdisplay) >> 4;
641 dsc_slice_count =
642 intel_dp_dsc_get_slice_count(intel_dp,
643 target_clock,
644 mode->hdisplay);
645 }
646 }
647
648 if ((mode_rate > max_rate && !(dsc_max_output_bpp && dsc_slice_count)) ||
649 target_clock > max_dotclk)
650 return MODE_CLOCK_HIGH;
651
652 if (mode->clock < 10000)
653 return MODE_CLOCK_LOW;
654
655 if (mode->flags & DRM_MODE_FLAG_DBLCLK)
656 return MODE_H_ILLEGAL;
657
658 return MODE_OK;
659}
660
661u32 intel_dp_pack_aux(const u8 *src, int src_bytes)
662{
663 int i;
664 u32 v = 0;
665
666 if (src_bytes > 4)
667 src_bytes = 4;
668 for (i = 0; i < src_bytes; i++)
669 v |= ((u32)src[i]) << ((3 - i) * 8);
670 return v;
671}
672
673static void intel_dp_unpack_aux(u32 src, u8 *dst, int dst_bytes)
674{
675 int i;
676 if (dst_bytes > 4)
677 dst_bytes = 4;
678 for (i = 0; i < dst_bytes; i++)
679 dst[i] = src >> ((3-i) * 8);
680}
681
682static void
683intel_dp_init_panel_power_sequencer(struct intel_dp *intel_dp);
684static void
685intel_dp_init_panel_power_sequencer_registers(struct intel_dp *intel_dp,
686 bool force_disable_vdd);
687static void
688intel_dp_pps_init(struct intel_dp *intel_dp);
689
690static intel_wakeref_t
691pps_lock(struct intel_dp *intel_dp)
692{
693 struct drm_i915_private *dev_priv = dp_to_i915(intel_dp);
694 intel_wakeref_t wakeref;
695
696 /*
697 * See intel_power_sequencer_reset() why we need
698 * a power domain reference here.
699 */
700 wakeref = intel_display_power_get(dev_priv,
701 intel_aux_power_domain(dp_to_dig_port(intel_dp)));
702
703 mutex_lock(&dev_priv->pps_mutex);
704
705 return wakeref;
706}
707
708static intel_wakeref_t
709pps_unlock(struct intel_dp *intel_dp, intel_wakeref_t wakeref)
710{
711 struct drm_i915_private *dev_priv = dp_to_i915(intel_dp);
712
713 mutex_unlock(&dev_priv->pps_mutex);
714 intel_display_power_put(dev_priv,
715 intel_aux_power_domain(dp_to_dig_port(intel_dp)),
716 wakeref);
717 return 0;
718}
719
720#define with_pps_lock(dp, wf) \
721 for ((wf) = pps_lock(dp); (wf); (wf) = pps_unlock((dp), (wf)))
722
723static void
724vlv_power_sequencer_kick(struct intel_dp *intel_dp)
725{
726 struct drm_i915_private *dev_priv = dp_to_i915(intel_dp);
727 struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp);
728 enum pipe pipe = intel_dp->pps_pipe;
729 bool pll_enabled, release_cl_override = false;
730 enum dpio_phy phy = DPIO_PHY(pipe);
731 enum dpio_channel ch = vlv_pipe_to_channel(pipe);
732 u32 DP;
733
734 if (WARN(I915_READ(intel_dp->output_reg) & DP_PORT_EN,
735 "skipping pipe %c power sequencer kick due to port %c being active\n",
736 pipe_name(pipe), port_name(intel_dig_port->base.port)))
737 return;
738
739 DRM_DEBUG_KMS("kicking pipe %c power sequencer for port %c\n",
740 pipe_name(pipe), port_name(intel_dig_port->base.port));
741
742 /* Preserve the BIOS-computed detected bit. This is
743 * supposed to be read-only.
744 */
745 DP = I915_READ(intel_dp->output_reg) & DP_DETECTED;
746 DP |= DP_VOLTAGE_0_4 | DP_PRE_EMPHASIS_0;
747 DP |= DP_PORT_WIDTH(1);
748 DP |= DP_LINK_TRAIN_PAT_1;
749
750 if (IS_CHERRYVIEW(dev_priv))
751 DP |= DP_PIPE_SEL_CHV(pipe);
752 else
753 DP |= DP_PIPE_SEL(pipe);
754
755 pll_enabled = I915_READ(DPLL(pipe)) & DPLL_VCO_ENABLE;
756
757 /*
758 * The DPLL for the pipe must be enabled for this to work.
759 * So enable temporarily it if it's not already enabled.
760 */
761 if (!pll_enabled) {
762 release_cl_override = IS_CHERRYVIEW(dev_priv) &&
763 !chv_phy_powergate_ch(dev_priv, phy, ch, true);
764
765 if (vlv_force_pll_on(dev_priv, pipe, IS_CHERRYVIEW(dev_priv) ?
766 &chv_dpll[0].dpll : &vlv_dpll[0].dpll)) {
767 DRM_ERROR("Failed to force on pll for pipe %c!\n",
768 pipe_name(pipe));
769 return;
770 }
771 }
772
773 /*
774 * Similar magic as in intel_dp_enable_port().
775 * We _must_ do this port enable + disable trick
776 * to make this power sequencer lock onto the port.
777 * Otherwise even VDD force bit won't work.
778 */
779 I915_WRITE(intel_dp->output_reg, DP);
780 POSTING_READ(intel_dp->output_reg);
781
782 I915_WRITE(intel_dp->output_reg, DP | DP_PORT_EN);
783 POSTING_READ(intel_dp->output_reg);
784
785 I915_WRITE(intel_dp->output_reg, DP & ~DP_PORT_EN);
786 POSTING_READ(intel_dp->output_reg);
787
788 if (!pll_enabled) {
789 vlv_force_pll_off(dev_priv, pipe);
790
791 if (release_cl_override)
792 chv_phy_powergate_ch(dev_priv, phy, ch, false);
793 }
794}
795
796static enum pipe vlv_find_free_pps(struct drm_i915_private *dev_priv)
797{
798 struct intel_encoder *encoder;
799 unsigned int pipes = (1 << PIPE_A) | (1 << PIPE_B);
800
801 /*
802 * We don't have power sequencer currently.
803 * Pick one that's not used by other ports.
804 */
805 for_each_intel_dp(&dev_priv->drm, encoder) {
806 struct intel_dp *intel_dp = enc_to_intel_dp(&encoder->base);
807
808 if (encoder->type == INTEL_OUTPUT_EDP) {
809 WARN_ON(intel_dp->active_pipe != INVALID_PIPE &&
810 intel_dp->active_pipe != intel_dp->pps_pipe);
811
812 if (intel_dp->pps_pipe != INVALID_PIPE)
813 pipes &= ~(1 << intel_dp->pps_pipe);
814 } else {
815 WARN_ON(intel_dp->pps_pipe != INVALID_PIPE);
816
817 if (intel_dp->active_pipe != INVALID_PIPE)
818 pipes &= ~(1 << intel_dp->active_pipe);
819 }
820 }
821
822 if (pipes == 0)
823 return INVALID_PIPE;
824
825 return ffs(pipes) - 1;
826}
827
828static enum pipe
829vlv_power_sequencer_pipe(struct intel_dp *intel_dp)
830{
831 struct drm_i915_private *dev_priv = dp_to_i915(intel_dp);
832 struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp);
833 enum pipe pipe;
834
835 lockdep_assert_held(&dev_priv->pps_mutex);
836
837 /* We should never land here with regular DP ports */
838 WARN_ON(!intel_dp_is_edp(intel_dp));
839
840 WARN_ON(intel_dp->active_pipe != INVALID_PIPE &&
841 intel_dp->active_pipe != intel_dp->pps_pipe);
842
843 if (intel_dp->pps_pipe != INVALID_PIPE)
844 return intel_dp->pps_pipe;
845
846 pipe = vlv_find_free_pps(dev_priv);
847
848 /*
849 * Didn't find one. This should not happen since there
850 * are two power sequencers and up to two eDP ports.
851 */
852 if (WARN_ON(pipe == INVALID_PIPE))
853 pipe = PIPE_A;
854
855 vlv_steal_power_sequencer(dev_priv, pipe);
856 intel_dp->pps_pipe = pipe;
857
858 DRM_DEBUG_KMS("picked pipe %c power sequencer for port %c\n",
859 pipe_name(intel_dp->pps_pipe),
860 port_name(intel_dig_port->base.port));
861
862 /* init power sequencer on this pipe and port */
863 intel_dp_init_panel_power_sequencer(intel_dp);
864 intel_dp_init_panel_power_sequencer_registers(intel_dp, true);
865
866 /*
867 * Even vdd force doesn't work until we've made
868 * the power sequencer lock in on the port.
869 */
870 vlv_power_sequencer_kick(intel_dp);
871
872 return intel_dp->pps_pipe;
873}
874
875static int
876bxt_power_sequencer_idx(struct intel_dp *intel_dp)
877{
878 struct drm_i915_private *dev_priv = dp_to_i915(intel_dp);
879 int backlight_controller = dev_priv->vbt.backlight.controller;
880
881 lockdep_assert_held(&dev_priv->pps_mutex);
882
883 /* We should never land here with regular DP ports */
884 WARN_ON(!intel_dp_is_edp(intel_dp));
885
886 if (!intel_dp->pps_reset)
887 return backlight_controller;
888
889 intel_dp->pps_reset = false;
890
891 /*
892 * Only the HW needs to be reprogrammed, the SW state is fixed and
893 * has been setup during connector init.
894 */
895 intel_dp_init_panel_power_sequencer_registers(intel_dp, false);
896
897 return backlight_controller;
898}
899
900typedef bool (*vlv_pipe_check)(struct drm_i915_private *dev_priv,
901 enum pipe pipe);
902
903static bool vlv_pipe_has_pp_on(struct drm_i915_private *dev_priv,
904 enum pipe pipe)
905{
906 return I915_READ(PP_STATUS(pipe)) & PP_ON;
907}
908
909static bool vlv_pipe_has_vdd_on(struct drm_i915_private *dev_priv,
910 enum pipe pipe)
911{
912 return I915_READ(PP_CONTROL(pipe)) & EDP_FORCE_VDD;
913}
914
915static bool vlv_pipe_any(struct drm_i915_private *dev_priv,
916 enum pipe pipe)
917{
918 return true;
919}
920
921static enum pipe
922vlv_initial_pps_pipe(struct drm_i915_private *dev_priv,
923 enum port port,
924 vlv_pipe_check pipe_check)
925{
926 enum pipe pipe;
927
928 for (pipe = PIPE_A; pipe <= PIPE_B; pipe++) {
929 u32 port_sel = I915_READ(PP_ON_DELAYS(pipe)) &
930 PANEL_PORT_SELECT_MASK;
931
932 if (port_sel != PANEL_PORT_SELECT_VLV(port))
933 continue;
934
935 if (!pipe_check(dev_priv, pipe))
936 continue;
937
938 return pipe;
939 }
940
941 return INVALID_PIPE;
942}
943
944static void
945vlv_initial_power_sequencer_setup(struct intel_dp *intel_dp)
946{
947 struct drm_i915_private *dev_priv = dp_to_i915(intel_dp);
948 struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp);
949 enum port port = intel_dig_port->base.port;
950
951 lockdep_assert_held(&dev_priv->pps_mutex);
952
953 /* try to find a pipe with this port selected */
954 /* first pick one where the panel is on */
955 intel_dp->pps_pipe = vlv_initial_pps_pipe(dev_priv, port,
956 vlv_pipe_has_pp_on);
957 /* didn't find one? pick one where vdd is on */
958 if (intel_dp->pps_pipe == INVALID_PIPE)
959 intel_dp->pps_pipe = vlv_initial_pps_pipe(dev_priv, port,
960 vlv_pipe_has_vdd_on);
961 /* didn't find one? pick one with just the correct port */
962 if (intel_dp->pps_pipe == INVALID_PIPE)
963 intel_dp->pps_pipe = vlv_initial_pps_pipe(dev_priv, port,
964 vlv_pipe_any);
965
966 /* didn't find one? just let vlv_power_sequencer_pipe() pick one when needed */
967 if (intel_dp->pps_pipe == INVALID_PIPE) {
968 DRM_DEBUG_KMS("no initial power sequencer for port %c\n",
969 port_name(port));
970 return;
971 }
972
973 DRM_DEBUG_KMS("initial power sequencer for port %c: pipe %c\n",
974 port_name(port), pipe_name(intel_dp->pps_pipe));
975
976 intel_dp_init_panel_power_sequencer(intel_dp);
977 intel_dp_init_panel_power_sequencer_registers(intel_dp, false);
978}
979
980void intel_power_sequencer_reset(struct drm_i915_private *dev_priv)
981{
982 struct intel_encoder *encoder;
983
984 if (WARN_ON(!IS_VALLEYVIEW(dev_priv) && !IS_CHERRYVIEW(dev_priv) &&
985 !IS_GEN9_LP(dev_priv)))
986 return;
987
988 /*
989 * We can't grab pps_mutex here due to deadlock with power_domain
990 * mutex when power_domain functions are called while holding pps_mutex.
991 * That also means that in order to use pps_pipe the code needs to
992 * hold both a power domain reference and pps_mutex, and the power domain
993 * reference get/put must be done while _not_ holding pps_mutex.
994 * pps_{lock,unlock}() do these steps in the correct order, so one
995 * should use them always.
996 */
997
998 for_each_intel_dp(&dev_priv->drm, encoder) {
999 struct intel_dp *intel_dp = enc_to_intel_dp(&encoder->base);
1000
1001 WARN_ON(intel_dp->active_pipe != INVALID_PIPE);
1002
1003 if (encoder->type != INTEL_OUTPUT_EDP)
1004 continue;
1005
1006 if (IS_GEN9_LP(dev_priv))
1007 intel_dp->pps_reset = true;
1008 else
1009 intel_dp->pps_pipe = INVALID_PIPE;
1010 }
1011}
1012
1013struct pps_registers {
1014 i915_reg_t pp_ctrl;
1015 i915_reg_t pp_stat;
1016 i915_reg_t pp_on;
1017 i915_reg_t pp_off;
1018 i915_reg_t pp_div;
1019};
1020
1021static void intel_pps_get_registers(struct intel_dp *intel_dp,
1022 struct pps_registers *regs)
1023{
1024 struct drm_i915_private *dev_priv = dp_to_i915(intel_dp);
1025 int pps_idx = 0;
1026
1027 memset(regs, 0, sizeof(*regs));
1028
1029 if (IS_GEN9_LP(dev_priv))
1030 pps_idx = bxt_power_sequencer_idx(intel_dp);
1031 else if (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv))
1032 pps_idx = vlv_power_sequencer_pipe(intel_dp);
1033
1034 regs->pp_ctrl = PP_CONTROL(pps_idx);
1035 regs->pp_stat = PP_STATUS(pps_idx);
1036 regs->pp_on = PP_ON_DELAYS(pps_idx);
1037 regs->pp_off = PP_OFF_DELAYS(pps_idx);
1038
1039 /* Cycle delay moved from PP_DIVISOR to PP_CONTROL */
1040 if (IS_GEN9_LP(dev_priv) || INTEL_PCH_TYPE(dev_priv) >= PCH_CNP)
1041 regs->pp_div = INVALID_MMIO_REG;
1042 else
1043 regs->pp_div = PP_DIVISOR(pps_idx);
1044}
1045
1046static i915_reg_t
1047_pp_ctrl_reg(struct intel_dp *intel_dp)
1048{
1049 struct pps_registers regs;
1050
1051 intel_pps_get_registers(intel_dp, ®s);
1052
1053 return regs.pp_ctrl;
1054}
1055
1056static i915_reg_t
1057_pp_stat_reg(struct intel_dp *intel_dp)
1058{
1059 struct pps_registers regs;
1060
1061 intel_pps_get_registers(intel_dp, ®s);
1062
1063 return regs.pp_stat;
1064}
1065
1066/* Reboot notifier handler to shutdown panel power to guarantee T12 timing
1067 This function only applicable when panel PM state is not to be tracked */
1068static int edp_notify_handler(struct notifier_block *this, unsigned long code,
1069 void *unused)
1070{
1071 struct intel_dp *intel_dp = container_of(this, typeof(* intel_dp),
1072 edp_notifier);
1073 struct drm_i915_private *dev_priv = dp_to_i915(intel_dp);
1074 intel_wakeref_t wakeref;
1075
1076 if (!intel_dp_is_edp(intel_dp) || code != SYS_RESTART)
1077 return 0;
1078
1079 with_pps_lock(intel_dp, wakeref) {
1080 if (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv)) {
1081 enum pipe pipe = vlv_power_sequencer_pipe(intel_dp);
1082 i915_reg_t pp_ctrl_reg, pp_div_reg;
1083 u32 pp_div;
1084
1085 pp_ctrl_reg = PP_CONTROL(pipe);
1086 pp_div_reg = PP_DIVISOR(pipe);
1087 pp_div = I915_READ(pp_div_reg);
1088 pp_div &= PP_REFERENCE_DIVIDER_MASK;
1089
1090 /* 0x1F write to PP_DIV_REG sets max cycle delay */
1091 I915_WRITE(pp_div_reg, pp_div | 0x1F);
1092 I915_WRITE(pp_ctrl_reg, PANEL_UNLOCK_REGS);
1093 msleep(intel_dp->panel_power_cycle_delay);
1094 }
1095 }
1096
1097 return 0;
1098}
1099
1100static bool edp_have_panel_power(struct intel_dp *intel_dp)
1101{
1102 struct drm_i915_private *dev_priv = dp_to_i915(intel_dp);
1103
1104 lockdep_assert_held(&dev_priv->pps_mutex);
1105
1106 if ((IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv)) &&
1107 intel_dp->pps_pipe == INVALID_PIPE)
1108 return false;
1109
1110 return (I915_READ(_pp_stat_reg(intel_dp)) & PP_ON) != 0;
1111}
1112
1113static bool edp_have_panel_vdd(struct intel_dp *intel_dp)
1114{
1115 struct drm_i915_private *dev_priv = dp_to_i915(intel_dp);
1116
1117 lockdep_assert_held(&dev_priv->pps_mutex);
1118
1119 if ((IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv)) &&
1120 intel_dp->pps_pipe == INVALID_PIPE)
1121 return false;
1122
1123 return I915_READ(_pp_ctrl_reg(intel_dp)) & EDP_FORCE_VDD;
1124}
1125
1126static void
1127intel_dp_check_edp(struct intel_dp *intel_dp)
1128{
1129 struct drm_i915_private *dev_priv = dp_to_i915(intel_dp);
1130
1131 if (!intel_dp_is_edp(intel_dp))
1132 return;
1133
1134 if (!edp_have_panel_power(intel_dp) && !edp_have_panel_vdd(intel_dp)) {
1135 WARN(1, "eDP powered off while attempting aux channel communication.\n");
1136 DRM_DEBUG_KMS("Status 0x%08x Control 0x%08x\n",
1137 I915_READ(_pp_stat_reg(intel_dp)),
1138 I915_READ(_pp_ctrl_reg(intel_dp)));
1139 }
1140}
1141
1142static u32
1143intel_dp_aux_wait_done(struct intel_dp *intel_dp)
1144{
1145 struct drm_i915_private *i915 = dp_to_i915(intel_dp);
1146 i915_reg_t ch_ctl = intel_dp->aux_ch_ctl_reg(intel_dp);
1147 u32 status;
1148 bool done;
1149
1150#define C (((status = intel_uncore_read_notrace(&i915->uncore, ch_ctl)) & DP_AUX_CH_CTL_SEND_BUSY) == 0)
1151 done = wait_event_timeout(i915->gmbus_wait_queue, C,
1152 msecs_to_jiffies_timeout(10));
1153
1154 /* just trace the final value */
1155 trace_i915_reg_rw(false, ch_ctl, status, sizeof(status), true);
1156
1157 if (!done)
1158 DRM_ERROR("dp aux hw did not signal timeout!\n");
1159#undef C
1160
1161 return status;
1162}
1163
1164static u32 g4x_get_aux_clock_divider(struct intel_dp *intel_dp, int index)
1165{
1166 struct drm_i915_private *dev_priv = dp_to_i915(intel_dp);
1167
1168 if (index)
1169 return 0;
1170
1171 /*
1172 * The clock divider is based off the hrawclk, and would like to run at
1173 * 2MHz. So, take the hrawclk value and divide by 2000 and use that
1174 */
1175 return DIV_ROUND_CLOSEST(dev_priv->rawclk_freq, 2000);
1176}
1177
1178static u32 ilk_get_aux_clock_divider(struct intel_dp *intel_dp, int index)
1179{
1180 struct drm_i915_private *dev_priv = dp_to_i915(intel_dp);
1181 struct intel_digital_port *dig_port = dp_to_dig_port(intel_dp);
1182
1183 if (index)
1184 return 0;
1185
1186 /*
1187 * The clock divider is based off the cdclk or PCH rawclk, and would
1188 * like to run at 2MHz. So, take the cdclk or PCH rawclk value and
1189 * divide by 2000 and use that
1190 */
1191 if (dig_port->aux_ch == AUX_CH_A)
1192 return DIV_ROUND_CLOSEST(dev_priv->cdclk.hw.cdclk, 2000);
1193 else
1194 return DIV_ROUND_CLOSEST(dev_priv->rawclk_freq, 2000);
1195}
1196
1197static u32 hsw_get_aux_clock_divider(struct intel_dp *intel_dp, int index)
1198{
1199 struct drm_i915_private *dev_priv = dp_to_i915(intel_dp);
1200 struct intel_digital_port *dig_port = dp_to_dig_port(intel_dp);
1201
1202 if (dig_port->aux_ch != AUX_CH_A && HAS_PCH_LPT_H(dev_priv)) {
1203 /* Workaround for non-ULT HSW */
1204 switch (index) {
1205 case 0: return 63;
1206 case 1: return 72;
1207 default: return 0;
1208 }
1209 }
1210
1211 return ilk_get_aux_clock_divider(intel_dp, index);
1212}
1213
1214static u32 skl_get_aux_clock_divider(struct intel_dp *intel_dp, int index)
1215{
1216 /*
1217 * SKL doesn't need us to program the AUX clock divider (Hardware will
1218 * derive the clock from CDCLK automatically). We still implement the
1219 * get_aux_clock_divider vfunc to plug-in into the existing code.
1220 */
1221 return index ? 0 : 1;
1222}
1223
1224static u32 g4x_get_aux_send_ctl(struct intel_dp *intel_dp,
1225 int send_bytes,
1226 u32 aux_clock_divider)
1227{
1228 struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp);
1229 struct drm_i915_private *dev_priv =
1230 to_i915(intel_dig_port->base.base.dev);
1231 u32 precharge, timeout;
1232
1233 if (IS_GEN(dev_priv, 6))
1234 precharge = 3;
1235 else
1236 precharge = 5;
1237
1238 if (IS_BROADWELL(dev_priv))
1239 timeout = DP_AUX_CH_CTL_TIME_OUT_600us;
1240 else
1241 timeout = DP_AUX_CH_CTL_TIME_OUT_400us;
1242
1243 return DP_AUX_CH_CTL_SEND_BUSY |
1244 DP_AUX_CH_CTL_DONE |
1245 DP_AUX_CH_CTL_INTERRUPT |
1246 DP_AUX_CH_CTL_TIME_OUT_ERROR |
1247 timeout |
1248 DP_AUX_CH_CTL_RECEIVE_ERROR |
1249 (send_bytes << DP_AUX_CH_CTL_MESSAGE_SIZE_SHIFT) |
1250 (precharge << DP_AUX_CH_CTL_PRECHARGE_2US_SHIFT) |
1251 (aux_clock_divider << DP_AUX_CH_CTL_BIT_CLOCK_2X_SHIFT);
1252}
1253
1254static u32 skl_get_aux_send_ctl(struct intel_dp *intel_dp,
1255 int send_bytes,
1256 u32 unused)
1257{
1258 struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp);
1259 struct drm_i915_private *i915 =
1260 to_i915(intel_dig_port->base.base.dev);
1261 enum phy phy = intel_port_to_phy(i915, intel_dig_port->base.port);
1262 u32 ret;
1263
1264 ret = DP_AUX_CH_CTL_SEND_BUSY |
1265 DP_AUX_CH_CTL_DONE |
1266 DP_AUX_CH_CTL_INTERRUPT |
1267 DP_AUX_CH_CTL_TIME_OUT_ERROR |
1268 DP_AUX_CH_CTL_TIME_OUT_MAX |
1269 DP_AUX_CH_CTL_RECEIVE_ERROR |
1270 (send_bytes << DP_AUX_CH_CTL_MESSAGE_SIZE_SHIFT) |
1271 DP_AUX_CH_CTL_FW_SYNC_PULSE_SKL(32) |
1272 DP_AUX_CH_CTL_SYNC_PULSE_SKL(32);
1273
1274 if (intel_phy_is_tc(i915, phy) &&
1275 intel_dig_port->tc_mode == TC_PORT_TBT_ALT)
1276 ret |= DP_AUX_CH_CTL_TBT_IO;
1277
1278 return ret;
1279}
1280
1281static int
1282intel_dp_aux_xfer(struct intel_dp *intel_dp,
1283 const u8 *send, int send_bytes,
1284 u8 *recv, int recv_size,
1285 u32 aux_send_ctl_flags)
1286{
1287 struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp);
1288 struct drm_i915_private *i915 =
1289 to_i915(intel_dig_port->base.base.dev);
1290 struct intel_uncore *uncore = &i915->uncore;
1291 enum phy phy = intel_port_to_phy(i915, intel_dig_port->base.port);
1292 bool is_tc_port = intel_phy_is_tc(i915, phy);
1293 i915_reg_t ch_ctl, ch_data[5];
1294 u32 aux_clock_divider;
1295 enum intel_display_power_domain aux_domain =
1296 intel_aux_power_domain(intel_dig_port);
1297 intel_wakeref_t aux_wakeref;
1298 intel_wakeref_t pps_wakeref;
1299 int i, ret, recv_bytes;
1300 int try, clock = 0;
1301 u32 status;
1302 bool vdd;
1303
1304 ch_ctl = intel_dp->aux_ch_ctl_reg(intel_dp);
1305 for (i = 0; i < ARRAY_SIZE(ch_data); i++)
1306 ch_data[i] = intel_dp->aux_ch_data_reg(intel_dp, i);
1307
1308 if (is_tc_port)
1309 intel_tc_port_lock(intel_dig_port);
1310
1311 aux_wakeref = intel_display_power_get(i915, aux_domain);
1312 pps_wakeref = pps_lock(intel_dp);
1313
1314 /*
1315 * We will be called with VDD already enabled for dpcd/edid/oui reads.
1316 * In such cases we want to leave VDD enabled and it's up to upper layers
1317 * to turn it off. But for eg. i2c-dev access we need to turn it on/off
1318 * ourselves.
1319 */
1320 vdd = edp_panel_vdd_on(intel_dp);
1321
1322 /* dp aux is extremely sensitive to irq latency, hence request the
1323 * lowest possible wakeup latency and so prevent the cpu from going into
1324 * deep sleep states.
1325 */
1326 pm_qos_update_request(&i915->pm_qos, 0);
1327
1328 intel_dp_check_edp(intel_dp);
1329
1330 /* Try to wait for any previous AUX channel activity */
1331 for (try = 0; try < 3; try++) {
1332 status = intel_uncore_read_notrace(uncore, ch_ctl);
1333 if ((status & DP_AUX_CH_CTL_SEND_BUSY) == 0)
1334 break;
1335 msleep(1);
1336 }
1337 /* just trace the final value */
1338 trace_i915_reg_rw(false, ch_ctl, status, sizeof(status), true);
1339
1340 if (try == 3) {
1341 static u32 last_status = -1;
1342 const u32 status = intel_uncore_read(uncore, ch_ctl);
1343
1344 if (status != last_status) {
1345 WARN(1, "dp_aux_ch not started status 0x%08x\n",
1346 status);
1347 last_status = status;
1348 }
1349
1350 ret = -EBUSY;
1351 goto out;
1352 }
1353
1354 /* Only 5 data registers! */
1355 if (WARN_ON(send_bytes > 20 || recv_size > 20)) {
1356 ret = -E2BIG;
1357 goto out;
1358 }
1359
1360 while ((aux_clock_divider = intel_dp->get_aux_clock_divider(intel_dp, clock++))) {
1361 u32 send_ctl = intel_dp->get_aux_send_ctl(intel_dp,
1362 send_bytes,
1363 aux_clock_divider);
1364
1365 send_ctl |= aux_send_ctl_flags;
1366
1367 /* Must try at least 3 times according to DP spec */
1368 for (try = 0; try < 5; try++) {
1369 /* Load the send data into the aux channel data registers */
1370 for (i = 0; i < send_bytes; i += 4)
1371 intel_uncore_write(uncore,
1372 ch_data[i >> 2],
1373 intel_dp_pack_aux(send + i,
1374 send_bytes - i));
1375
1376 /* Send the command and wait for it to complete */
1377 intel_uncore_write(uncore, ch_ctl, send_ctl);
1378
1379 status = intel_dp_aux_wait_done(intel_dp);
1380
1381 /* Clear done status and any errors */
1382 intel_uncore_write(uncore,
1383 ch_ctl,
1384 status |
1385 DP_AUX_CH_CTL_DONE |
1386 DP_AUX_CH_CTL_TIME_OUT_ERROR |
1387 DP_AUX_CH_CTL_RECEIVE_ERROR);
1388
1389 /* DP CTS 1.2 Core Rev 1.1, 4.2.1.1 & 4.2.1.2
1390 * 400us delay required for errors and timeouts
1391 * Timeout errors from the HW already meet this
1392 * requirement so skip to next iteration
1393 */
1394 if (status & DP_AUX_CH_CTL_TIME_OUT_ERROR)
1395 continue;
1396
1397 if (status & DP_AUX_CH_CTL_RECEIVE_ERROR) {
1398 usleep_range(400, 500);
1399 continue;
1400 }
1401 if (status & DP_AUX_CH_CTL_DONE)
1402 goto done;
1403 }
1404 }
1405
1406 if ((status & DP_AUX_CH_CTL_DONE) == 0) {
1407 DRM_ERROR("dp_aux_ch not done status 0x%08x\n", status);
1408 ret = -EBUSY;
1409 goto out;
1410 }
1411
1412done:
1413 /* Check for timeout or receive error.
1414 * Timeouts occur when the sink is not connected
1415 */
1416 if (status & DP_AUX_CH_CTL_RECEIVE_ERROR) {
1417 DRM_ERROR("dp_aux_ch receive error status 0x%08x\n", status);
1418 ret = -EIO;
1419 goto out;
1420 }
1421
1422 /* Timeouts occur when the device isn't connected, so they're
1423 * "normal" -- don't fill the kernel log with these */
1424 if (status & DP_AUX_CH_CTL_TIME_OUT_ERROR) {
1425 DRM_DEBUG_KMS("dp_aux_ch timeout status 0x%08x\n", status);
1426 ret = -ETIMEDOUT;
1427 goto out;
1428 }
1429
1430 /* Unload any bytes sent back from the other side */
1431 recv_bytes = ((status & DP_AUX_CH_CTL_MESSAGE_SIZE_MASK) >>
1432 DP_AUX_CH_CTL_MESSAGE_SIZE_SHIFT);
1433
1434 /*
1435 * By BSpec: "Message sizes of 0 or >20 are not allowed."
1436 * We have no idea of what happened so we return -EBUSY so
1437 * drm layer takes care for the necessary retries.
1438 */
1439 if (recv_bytes == 0 || recv_bytes > 20) {
1440 DRM_DEBUG_KMS("Forbidden recv_bytes = %d on aux transaction\n",
1441 recv_bytes);
1442 ret = -EBUSY;
1443 goto out;
1444 }
1445
1446 if (recv_bytes > recv_size)
1447 recv_bytes = recv_size;
1448
1449 for (i = 0; i < recv_bytes; i += 4)
1450 intel_dp_unpack_aux(intel_uncore_read(uncore, ch_data[i >> 2]),
1451 recv + i, recv_bytes - i);
1452
1453 ret = recv_bytes;
1454out:
1455 pm_qos_update_request(&i915->pm_qos, PM_QOS_DEFAULT_VALUE);
1456
1457 if (vdd)
1458 edp_panel_vdd_off(intel_dp, false);
1459
1460 pps_unlock(intel_dp, pps_wakeref);
1461 intel_display_power_put_async(i915, aux_domain, aux_wakeref);
1462
1463 if (is_tc_port)
1464 intel_tc_port_unlock(intel_dig_port);
1465
1466 return ret;
1467}
1468
1469#define BARE_ADDRESS_SIZE 3
1470#define HEADER_SIZE (BARE_ADDRESS_SIZE + 1)
1471
1472static void
1473intel_dp_aux_header(u8 txbuf[HEADER_SIZE],
1474 const struct drm_dp_aux_msg *msg)
1475{
1476 txbuf[0] = (msg->request << 4) | ((msg->address >> 16) & 0xf);
1477 txbuf[1] = (msg->address >> 8) & 0xff;
1478 txbuf[2] = msg->address & 0xff;
1479 txbuf[3] = msg->size - 1;
1480}
1481
1482static ssize_t
1483intel_dp_aux_transfer(struct drm_dp_aux *aux, struct drm_dp_aux_msg *msg)
1484{
1485 struct intel_dp *intel_dp = container_of(aux, struct intel_dp, aux);
1486 u8 txbuf[20], rxbuf[20];
1487 size_t txsize, rxsize;
1488 int ret;
1489
1490 intel_dp_aux_header(txbuf, msg);
1491
1492 switch (msg->request & ~DP_AUX_I2C_MOT) {
1493 case DP_AUX_NATIVE_WRITE:
1494 case DP_AUX_I2C_WRITE:
1495 case DP_AUX_I2C_WRITE_STATUS_UPDATE:
1496 txsize = msg->size ? HEADER_SIZE + msg->size : BARE_ADDRESS_SIZE;
1497 rxsize = 2; /* 0 or 1 data bytes */
1498
1499 if (WARN_ON(txsize > 20))
1500 return -E2BIG;
1501
1502 WARN_ON(!msg->buffer != !msg->size);
1503
1504 if (msg->buffer)
1505 memcpy(txbuf + HEADER_SIZE, msg->buffer, msg->size);
1506
1507 ret = intel_dp_aux_xfer(intel_dp, txbuf, txsize,
1508 rxbuf, rxsize, 0);
1509 if (ret > 0) {
1510 msg->reply = rxbuf[0] >> 4;
1511
1512 if (ret > 1) {
1513 /* Number of bytes written in a short write. */
1514 ret = clamp_t(int, rxbuf[1], 0, msg->size);
1515 } else {
1516 /* Return payload size. */
1517 ret = msg->size;
1518 }
1519 }
1520 break;
1521
1522 case DP_AUX_NATIVE_READ:
1523 case DP_AUX_I2C_READ:
1524 txsize = msg->size ? HEADER_SIZE : BARE_ADDRESS_SIZE;
1525 rxsize = msg->size + 1;
1526
1527 if (WARN_ON(rxsize > 20))
1528 return -E2BIG;
1529
1530 ret = intel_dp_aux_xfer(intel_dp, txbuf, txsize,
1531 rxbuf, rxsize, 0);
1532 if (ret > 0) {
1533 msg->reply = rxbuf[0] >> 4;
1534 /*
1535 * Assume happy day, and copy the data. The caller is
1536 * expected to check msg->reply before touching it.
1537 *
1538 * Return payload size.
1539 */
1540 ret--;
1541 memcpy(msg->buffer, rxbuf + 1, ret);
1542 }
1543 break;
1544
1545 default:
1546 ret = -EINVAL;
1547 break;
1548 }
1549
1550 return ret;
1551}
1552
1553
1554static i915_reg_t g4x_aux_ctl_reg(struct intel_dp *intel_dp)
1555{
1556 struct drm_i915_private *dev_priv = dp_to_i915(intel_dp);
1557 struct intel_digital_port *dig_port = dp_to_dig_port(intel_dp);
1558 enum aux_ch aux_ch = dig_port->aux_ch;
1559
1560 switch (aux_ch) {
1561 case AUX_CH_B:
1562 case AUX_CH_C:
1563 case AUX_CH_D:
1564 return DP_AUX_CH_CTL(aux_ch);
1565 default:
1566 MISSING_CASE(aux_ch);
1567 return DP_AUX_CH_CTL(AUX_CH_B);
1568 }
1569}
1570
1571static i915_reg_t g4x_aux_data_reg(struct intel_dp *intel_dp, int index)
1572{
1573 struct drm_i915_private *dev_priv = dp_to_i915(intel_dp);
1574 struct intel_digital_port *dig_port = dp_to_dig_port(intel_dp);
1575 enum aux_ch aux_ch = dig_port->aux_ch;
1576
1577 switch (aux_ch) {
1578 case AUX_CH_B:
1579 case AUX_CH_C:
1580 case AUX_CH_D:
1581 return DP_AUX_CH_DATA(aux_ch, index);
1582 default:
1583 MISSING_CASE(aux_ch);
1584 return DP_AUX_CH_DATA(AUX_CH_B, index);
1585 }
1586}
1587
1588static i915_reg_t ilk_aux_ctl_reg(struct intel_dp *intel_dp)
1589{
1590 struct drm_i915_private *dev_priv = dp_to_i915(intel_dp);
1591 struct intel_digital_port *dig_port = dp_to_dig_port(intel_dp);
1592 enum aux_ch aux_ch = dig_port->aux_ch;
1593
1594 switch (aux_ch) {
1595 case AUX_CH_A:
1596 return DP_AUX_CH_CTL(aux_ch);
1597 case AUX_CH_B:
1598 case AUX_CH_C:
1599 case AUX_CH_D:
1600 return PCH_DP_AUX_CH_CTL(aux_ch);
1601 default:
1602 MISSING_CASE(aux_ch);
1603 return DP_AUX_CH_CTL(AUX_CH_A);
1604 }
1605}
1606
1607static i915_reg_t ilk_aux_data_reg(struct intel_dp *intel_dp, int index)
1608{
1609 struct drm_i915_private *dev_priv = dp_to_i915(intel_dp);
1610 struct intel_digital_port *dig_port = dp_to_dig_port(intel_dp);
1611 enum aux_ch aux_ch = dig_port->aux_ch;
1612
1613 switch (aux_ch) {
1614 case AUX_CH_A:
1615 return DP_AUX_CH_DATA(aux_ch, index);
1616 case AUX_CH_B:
1617 case AUX_CH_C:
1618 case AUX_CH_D:
1619 return PCH_DP_AUX_CH_DATA(aux_ch, index);
1620 default:
1621 MISSING_CASE(aux_ch);
1622 return DP_AUX_CH_DATA(AUX_CH_A, index);
1623 }
1624}
1625
1626static i915_reg_t skl_aux_ctl_reg(struct intel_dp *intel_dp)
1627{
1628 struct drm_i915_private *dev_priv = dp_to_i915(intel_dp);
1629 struct intel_digital_port *dig_port = dp_to_dig_port(intel_dp);
1630 enum aux_ch aux_ch = dig_port->aux_ch;
1631
1632 switch (aux_ch) {
1633 case AUX_CH_A:
1634 case AUX_CH_B:
1635 case AUX_CH_C:
1636 case AUX_CH_D:
1637 case AUX_CH_E:
1638 case AUX_CH_F:
1639 return DP_AUX_CH_CTL(aux_ch);
1640 default:
1641 MISSING_CASE(aux_ch);
1642 return DP_AUX_CH_CTL(AUX_CH_A);
1643 }
1644}
1645
1646static i915_reg_t skl_aux_data_reg(struct intel_dp *intel_dp, int index)
1647{
1648 struct drm_i915_private *dev_priv = dp_to_i915(intel_dp);
1649 struct intel_digital_port *dig_port = dp_to_dig_port(intel_dp);
1650 enum aux_ch aux_ch = dig_port->aux_ch;
1651
1652 switch (aux_ch) {
1653 case AUX_CH_A:
1654 case AUX_CH_B:
1655 case AUX_CH_C:
1656 case AUX_CH_D:
1657 case AUX_CH_E:
1658 case AUX_CH_F:
1659 return DP_AUX_CH_DATA(aux_ch, index);
1660 default:
1661 MISSING_CASE(aux_ch);
1662 return DP_AUX_CH_DATA(AUX_CH_A, index);
1663 }
1664}
1665
1666static void
1667intel_dp_aux_fini(struct intel_dp *intel_dp)
1668{
1669 kfree(intel_dp->aux.name);
1670}
1671
1672static void
1673intel_dp_aux_init(struct intel_dp *intel_dp)
1674{
1675 struct drm_i915_private *dev_priv = dp_to_i915(intel_dp);
1676 struct intel_digital_port *dig_port = dp_to_dig_port(intel_dp);
1677 struct intel_encoder *encoder = &dig_port->base;
1678
1679 if (INTEL_GEN(dev_priv) >= 9) {
1680 intel_dp->aux_ch_ctl_reg = skl_aux_ctl_reg;
1681 intel_dp->aux_ch_data_reg = skl_aux_data_reg;
1682 } else if (HAS_PCH_SPLIT(dev_priv)) {
1683 intel_dp->aux_ch_ctl_reg = ilk_aux_ctl_reg;
1684 intel_dp->aux_ch_data_reg = ilk_aux_data_reg;
1685 } else {
1686 intel_dp->aux_ch_ctl_reg = g4x_aux_ctl_reg;
1687 intel_dp->aux_ch_data_reg = g4x_aux_data_reg;
1688 }
1689
1690 if (INTEL_GEN(dev_priv) >= 9)
1691 intel_dp->get_aux_clock_divider = skl_get_aux_clock_divider;
1692 else if (IS_BROADWELL(dev_priv) || IS_HASWELL(dev_priv))
1693 intel_dp->get_aux_clock_divider = hsw_get_aux_clock_divider;
1694 else if (HAS_PCH_SPLIT(dev_priv))
1695 intel_dp->get_aux_clock_divider = ilk_get_aux_clock_divider;
1696 else
1697 intel_dp->get_aux_clock_divider = g4x_get_aux_clock_divider;
1698
1699 if (INTEL_GEN(dev_priv) >= 9)
1700 intel_dp->get_aux_send_ctl = skl_get_aux_send_ctl;
1701 else
1702 intel_dp->get_aux_send_ctl = g4x_get_aux_send_ctl;
1703
1704 drm_dp_aux_init(&intel_dp->aux);
1705
1706 /* Failure to allocate our preferred name is not critical */
1707 intel_dp->aux.name = kasprintf(GFP_KERNEL, "DPDDC-%c",
1708 port_name(encoder->port));
1709 intel_dp->aux.transfer = intel_dp_aux_transfer;
1710}
1711
1712bool intel_dp_source_supports_hbr2(struct intel_dp *intel_dp)
1713{
1714 int max_rate = intel_dp->source_rates[intel_dp->num_source_rates - 1];
1715
1716 return max_rate >= 540000;
1717}
1718
1719bool intel_dp_source_supports_hbr3(struct intel_dp *intel_dp)
1720{
1721 int max_rate = intel_dp->source_rates[intel_dp->num_source_rates - 1];
1722
1723 return max_rate >= 810000;
1724}
1725
1726static void
1727intel_dp_set_clock(struct intel_encoder *encoder,
1728 struct intel_crtc_state *pipe_config)
1729{
1730 struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
1731 const struct dp_link_dpll *divisor = NULL;
1732 int i, count = 0;
1733
1734 if (IS_G4X(dev_priv)) {
1735 divisor = g4x_dpll;
1736 count = ARRAY_SIZE(g4x_dpll);
1737 } else if (HAS_PCH_SPLIT(dev_priv)) {
1738 divisor = pch_dpll;
1739 count = ARRAY_SIZE(pch_dpll);
1740 } else if (IS_CHERRYVIEW(dev_priv)) {
1741 divisor = chv_dpll;
1742 count = ARRAY_SIZE(chv_dpll);
1743 } else if (IS_VALLEYVIEW(dev_priv)) {
1744 divisor = vlv_dpll;
1745 count = ARRAY_SIZE(vlv_dpll);
1746 }
1747
1748 if (divisor && count) {
1749 for (i = 0; i < count; i++) {
1750 if (pipe_config->port_clock == divisor[i].clock) {
1751 pipe_config->dpll = divisor[i].dpll;
1752 pipe_config->clock_set = true;
1753 break;
1754 }
1755 }
1756 }
1757}
1758
1759static void snprintf_int_array(char *str, size_t len,
1760 const int *array, int nelem)
1761{
1762 int i;
1763
1764 str[0] = '\0';
1765
1766 for (i = 0; i < nelem; i++) {
1767 int r = snprintf(str, len, "%s%d", i ? ", " : "", array[i]);
1768 if (r >= len)
1769 return;
1770 str += r;
1771 len -= r;
1772 }
1773}
1774
1775static void intel_dp_print_rates(struct intel_dp *intel_dp)
1776{
1777 char str[128]; /* FIXME: too big for stack? */
1778
1779 if ((drm_debug & DRM_UT_KMS) == 0)
1780 return;
1781
1782 snprintf_int_array(str, sizeof(str),
1783 intel_dp->source_rates, intel_dp->num_source_rates);
1784 DRM_DEBUG_KMS("source rates: %s\n", str);
1785
1786 snprintf_int_array(str, sizeof(str),
1787 intel_dp->sink_rates, intel_dp->num_sink_rates);
1788 DRM_DEBUG_KMS("sink rates: %s\n", str);
1789
1790 snprintf_int_array(str, sizeof(str),
1791 intel_dp->common_rates, intel_dp->num_common_rates);
1792 DRM_DEBUG_KMS("common rates: %s\n", str);
1793}
1794
1795int
1796intel_dp_max_link_rate(struct intel_dp *intel_dp)
1797{
1798 int len;
1799
1800 len = intel_dp_common_len_rate_limit(intel_dp, intel_dp->max_link_rate);
1801 if (WARN_ON(len <= 0))
1802 return 162000;
1803
1804 return intel_dp->common_rates[len - 1];
1805}
1806
1807int intel_dp_rate_select(struct intel_dp *intel_dp, int rate)
1808{
1809 int i = intel_dp_rate_index(intel_dp->sink_rates,
1810 intel_dp->num_sink_rates, rate);
1811
1812 if (WARN_ON(i < 0))
1813 i = 0;
1814
1815 return i;
1816}
1817
1818void intel_dp_compute_rate(struct intel_dp *intel_dp, int port_clock,
1819 u8 *link_bw, u8 *rate_select)
1820{
1821 /* eDP 1.4 rate select method. */
1822 if (intel_dp->use_rate_select) {
1823 *link_bw = 0;
1824 *rate_select =
1825 intel_dp_rate_select(intel_dp, port_clock);
1826 } else {
1827 *link_bw = drm_dp_link_rate_to_bw_code(port_clock);
1828 *rate_select = 0;
1829 }
1830}
1831
1832static bool intel_dp_source_supports_fec(struct intel_dp *intel_dp,
1833 const struct intel_crtc_state *pipe_config)
1834{
1835 struct drm_i915_private *dev_priv = dp_to_i915(intel_dp);
1836
1837 return INTEL_GEN(dev_priv) >= 11 &&
1838 pipe_config->cpu_transcoder != TRANSCODER_A;
1839}
1840
1841static bool intel_dp_supports_fec(struct intel_dp *intel_dp,
1842 const struct intel_crtc_state *pipe_config)
1843{
1844 return intel_dp_source_supports_fec(intel_dp, pipe_config) &&
1845 drm_dp_sink_supports_fec(intel_dp->fec_capable);
1846}
1847
1848static bool intel_dp_source_supports_dsc(struct intel_dp *intel_dp,
1849 const struct intel_crtc_state *pipe_config)
1850{
1851 struct drm_i915_private *dev_priv = dp_to_i915(intel_dp);
1852
1853 return INTEL_GEN(dev_priv) >= 10 &&
1854 pipe_config->cpu_transcoder != TRANSCODER_A;
1855}
1856
1857static bool intel_dp_supports_dsc(struct intel_dp *intel_dp,
1858 const struct intel_crtc_state *pipe_config)
1859{
1860 if (!intel_dp_is_edp(intel_dp) && !pipe_config->fec_enable)
1861 return false;
1862
1863 return intel_dp_source_supports_dsc(intel_dp, pipe_config) &&
1864 drm_dp_sink_supports_dsc(intel_dp->dsc_dpcd);
1865}
1866
1867static int intel_dp_compute_bpp(struct intel_dp *intel_dp,
1868 struct intel_crtc_state *pipe_config)
1869{
1870 struct drm_i915_private *dev_priv = dp_to_i915(intel_dp);
1871 struct intel_connector *intel_connector = intel_dp->attached_connector;
1872 int bpp, bpc;
1873
1874 bpp = pipe_config->pipe_bpp;
1875 bpc = drm_dp_downstream_max_bpc(intel_dp->dpcd, intel_dp->downstream_ports);
1876
1877 if (bpc > 0)
1878 bpp = min(bpp, 3*bpc);
1879
1880 if (intel_dp_is_edp(intel_dp)) {
1881 /* Get bpp from vbt only for panels that dont have bpp in edid */
1882 if (intel_connector->base.display_info.bpc == 0 &&
1883 dev_priv->vbt.edp.bpp && dev_priv->vbt.edp.bpp < bpp) {
1884 DRM_DEBUG_KMS("clamping bpp for eDP panel to BIOS-provided %i\n",
1885 dev_priv->vbt.edp.bpp);
1886 bpp = dev_priv->vbt.edp.bpp;
1887 }
1888 }
1889
1890 return bpp;
1891}
1892
1893/* Adjust link config limits based on compliance test requests. */
1894void
1895intel_dp_adjust_compliance_config(struct intel_dp *intel_dp,
1896 struct intel_crtc_state *pipe_config,
1897 struct link_config_limits *limits)
1898{
1899 /* For DP Compliance we override the computed bpp for the pipe */
1900 if (intel_dp->compliance.test_data.bpc != 0) {
1901 int bpp = 3 * intel_dp->compliance.test_data.bpc;
1902
1903 limits->min_bpp = limits->max_bpp = bpp;
1904 pipe_config->dither_force_disable = bpp == 6 * 3;
1905
1906 DRM_DEBUG_KMS("Setting pipe_bpp to %d\n", bpp);
1907 }
1908
1909 /* Use values requested by Compliance Test Request */
1910 if (intel_dp->compliance.test_type == DP_TEST_LINK_TRAINING) {
1911 int index;
1912
1913 /* Validate the compliance test data since max values
1914 * might have changed due to link train fallback.
1915 */
1916 if (intel_dp_link_params_valid(intel_dp, intel_dp->compliance.test_link_rate,
1917 intel_dp->compliance.test_lane_count)) {
1918 index = intel_dp_rate_index(intel_dp->common_rates,
1919 intel_dp->num_common_rates,
1920 intel_dp->compliance.test_link_rate);
1921 if (index >= 0)
1922 limits->min_clock = limits->max_clock = index;
1923 limits->min_lane_count = limits->max_lane_count =
1924 intel_dp->compliance.test_lane_count;
1925 }
1926 }
1927}
1928
1929static int intel_dp_output_bpp(const struct intel_crtc_state *crtc_state, int bpp)
1930{
1931 /*
1932 * bpp value was assumed to RGB format. And YCbCr 4:2:0 output
1933 * format of the number of bytes per pixel will be half the number
1934 * of bytes of RGB pixel.
1935 */
1936 if (crtc_state->output_format == INTEL_OUTPUT_FORMAT_YCBCR420)
1937 bpp /= 2;
1938
1939 return bpp;
1940}
1941
1942/* Optimize link config in order: max bpp, min clock, min lanes */
1943static int
1944intel_dp_compute_link_config_wide(struct intel_dp *intel_dp,
1945 struct intel_crtc_state *pipe_config,
1946 const struct link_config_limits *limits)
1947{
1948 struct drm_display_mode *adjusted_mode = &pipe_config->base.adjusted_mode;
1949 int bpp, clock, lane_count;
1950 int mode_rate, link_clock, link_avail;
1951
1952 for (bpp = limits->max_bpp; bpp >= limits->min_bpp; bpp -= 2 * 3) {
1953 int output_bpp = intel_dp_output_bpp(pipe_config, bpp);
1954
1955 mode_rate = intel_dp_link_required(adjusted_mode->crtc_clock,
1956 output_bpp);
1957
1958 for (clock = limits->min_clock; clock <= limits->max_clock; clock++) {
1959 for (lane_count = limits->min_lane_count;
1960 lane_count <= limits->max_lane_count;
1961 lane_count <<= 1) {
1962 link_clock = intel_dp->common_rates[clock];
1963 link_avail = intel_dp_max_data_rate(link_clock,
1964 lane_count);
1965
1966 if (mode_rate <= link_avail) {
1967 pipe_config->lane_count = lane_count;
1968 pipe_config->pipe_bpp = bpp;
1969 pipe_config->port_clock = link_clock;
1970
1971 return 0;
1972 }
1973 }
1974 }
1975 }
1976
1977 return -EINVAL;
1978}
1979
1980static int intel_dp_dsc_compute_bpp(struct intel_dp *intel_dp, u8 dsc_max_bpc)
1981{
1982 int i, num_bpc;
1983 u8 dsc_bpc[3] = {0};
1984
1985 num_bpc = drm_dp_dsc_sink_supported_input_bpcs(intel_dp->dsc_dpcd,
1986 dsc_bpc);
1987 for (i = 0; i < num_bpc; i++) {
1988 if (dsc_max_bpc >= dsc_bpc[i])
1989 return dsc_bpc[i] * 3;
1990 }
1991
1992 return 0;
1993}
1994
1995static int intel_dp_dsc_compute_config(struct intel_dp *intel_dp,
1996 struct intel_crtc_state *pipe_config,
1997 struct drm_connector_state *conn_state,
1998 struct link_config_limits *limits)
1999{
2000 struct intel_digital_port *dig_port = dp_to_dig_port(intel_dp);
2001 struct drm_i915_private *dev_priv = to_i915(dig_port->base.base.dev);
2002 struct drm_display_mode *adjusted_mode = &pipe_config->base.adjusted_mode;
2003 u8 dsc_max_bpc;
2004 int pipe_bpp;
2005 int ret;
2006
2007 pipe_config->fec_enable = !intel_dp_is_edp(intel_dp) &&
2008 intel_dp_supports_fec(intel_dp, pipe_config);
2009
2010 if (!intel_dp_supports_dsc(intel_dp, pipe_config))
2011 return -EINVAL;
2012
2013 dsc_max_bpc = min_t(u8, DP_DSC_MAX_SUPPORTED_BPC,
2014 conn_state->max_requested_bpc);
2015
2016 pipe_bpp = intel_dp_dsc_compute_bpp(intel_dp, dsc_max_bpc);
2017 if (pipe_bpp < DP_DSC_MIN_SUPPORTED_BPC * 3) {
2018 DRM_DEBUG_KMS("No DSC support for less than 8bpc\n");
2019 return -EINVAL;
2020 }
2021
2022 /*
2023 * For now enable DSC for max bpp, max link rate, max lane count.
2024 * Optimize this later for the minimum possible link rate/lane count
2025 * with DSC enabled for the requested mode.
2026 */
2027 pipe_config->pipe_bpp = pipe_bpp;
2028 pipe_config->port_clock = intel_dp->common_rates[limits->max_clock];
2029 pipe_config->lane_count = limits->max_lane_count;
2030
2031 if (intel_dp_is_edp(intel_dp)) {
2032 pipe_config->dsc_params.compressed_bpp =
2033 min_t(u16, drm_edp_dsc_sink_output_bpp(intel_dp->dsc_dpcd) >> 4,
2034 pipe_config->pipe_bpp);
2035 pipe_config->dsc_params.slice_count =
2036 drm_dp_dsc_sink_max_slice_count(intel_dp->dsc_dpcd,
2037 true);
2038 } else {
2039 u16 dsc_max_output_bpp;
2040 u8 dsc_dp_slice_count;
2041
2042 dsc_max_output_bpp =
2043 intel_dp_dsc_get_output_bpp(pipe_config->port_clock,
2044 pipe_config->lane_count,
2045 adjusted_mode->crtc_clock,
2046 adjusted_mode->crtc_hdisplay);
2047 dsc_dp_slice_count =
2048 intel_dp_dsc_get_slice_count(intel_dp,
2049 adjusted_mode->crtc_clock,
2050 adjusted_mode->crtc_hdisplay);
2051 if (!dsc_max_output_bpp || !dsc_dp_slice_count) {
2052 DRM_DEBUG_KMS("Compressed BPP/Slice Count not supported\n");
2053 return -EINVAL;
2054 }
2055 pipe_config->dsc_params.compressed_bpp = min_t(u16,
2056 dsc_max_output_bpp >> 4,
2057 pipe_config->pipe_bpp);
2058 pipe_config->dsc_params.slice_count = dsc_dp_slice_count;
2059 }
2060 /*
2061 * VDSC engine operates at 1 Pixel per clock, so if peak pixel rate
2062 * is greater than the maximum Cdclock and if slice count is even
2063 * then we need to use 2 VDSC instances.
2064 */
2065 if (adjusted_mode->crtc_clock > dev_priv->max_cdclk_freq) {
2066 if (pipe_config->dsc_params.slice_count > 1) {
2067 pipe_config->dsc_params.dsc_split = true;
2068 } else {
2069 DRM_DEBUG_KMS("Cannot split stream to use 2 VDSC instances\n");
2070 return -EINVAL;
2071 }
2072 }
2073
2074 ret = intel_dp_compute_dsc_params(intel_dp, pipe_config);
2075 if (ret < 0) {
2076 DRM_DEBUG_KMS("Cannot compute valid DSC parameters for Input Bpp = %d "
2077 "Compressed BPP = %d\n",
2078 pipe_config->pipe_bpp,
2079 pipe_config->dsc_params.compressed_bpp);
2080 return ret;
2081 }
2082
2083 pipe_config->dsc_params.compression_enable = true;
2084 DRM_DEBUG_KMS("DP DSC computed with Input Bpp = %d "
2085 "Compressed Bpp = %d Slice Count = %d\n",
2086 pipe_config->pipe_bpp,
2087 pipe_config->dsc_params.compressed_bpp,
2088 pipe_config->dsc_params.slice_count);
2089
2090 return 0;
2091}
2092
2093int intel_dp_min_bpp(const struct intel_crtc_state *crtc_state)
2094{
2095 if (crtc_state->output_format == INTEL_OUTPUT_FORMAT_RGB)
2096 return 6 * 3;
2097 else
2098 return 8 * 3;
2099}
2100
2101static int
2102intel_dp_compute_link_config(struct intel_encoder *encoder,
2103 struct intel_crtc_state *pipe_config,
2104 struct drm_connector_state *conn_state)
2105{
2106 struct drm_display_mode *adjusted_mode = &pipe_config->base.adjusted_mode;
2107 struct intel_dp *intel_dp = enc_to_intel_dp(&encoder->base);
2108 struct link_config_limits limits;
2109 int common_len;
2110 int ret;
2111
2112 common_len = intel_dp_common_len_rate_limit(intel_dp,
2113 intel_dp->max_link_rate);
2114
2115 /* No common link rates between source and sink */
2116 WARN_ON(common_len <= 0);
2117
2118 limits.min_clock = 0;
2119 limits.max_clock = common_len - 1;
2120
2121 limits.min_lane_count = 1;
2122 limits.max_lane_count = intel_dp_max_lane_count(intel_dp);
2123
2124 limits.min_bpp = intel_dp_min_bpp(pipe_config);
2125 limits.max_bpp = intel_dp_compute_bpp(intel_dp, pipe_config);
2126
2127 if (intel_dp_is_edp(intel_dp)) {
2128 /*
2129 * Use the maximum clock and number of lanes the eDP panel
2130 * advertizes being capable of. The panels are generally
2131 * designed to support only a single clock and lane
2132 * configuration, and typically these values correspond to the
2133 * native resolution of the panel.
2134 */
2135 limits.min_lane_count = limits.max_lane_count;
2136 limits.min_clock = limits.max_clock;
2137 }
2138
2139 intel_dp_adjust_compliance_config(intel_dp, pipe_config, &limits);
2140
2141 DRM_DEBUG_KMS("DP link computation with max lane count %i "
2142 "max rate %d max bpp %d pixel clock %iKHz\n",
2143 limits.max_lane_count,
2144 intel_dp->common_rates[limits.max_clock],
2145 limits.max_bpp, adjusted_mode->crtc_clock);
2146
2147 /*
2148 * Optimize for slow and wide. This is the place to add alternative
2149 * optimization policy.
2150 */
2151 ret = intel_dp_compute_link_config_wide(intel_dp, pipe_config, &limits);
2152
2153 /* enable compression if the mode doesn't fit available BW */
2154 DRM_DEBUG_KMS("Force DSC en = %d\n", intel_dp->force_dsc_en);
2155 if (ret || intel_dp->force_dsc_en) {
2156 ret = intel_dp_dsc_compute_config(intel_dp, pipe_config,
2157 conn_state, &limits);
2158 if (ret < 0)
2159 return ret;
2160 }
2161
2162 if (pipe_config->dsc_params.compression_enable) {
2163 DRM_DEBUG_KMS("DP lane count %d clock %d Input bpp %d Compressed bpp %d\n",
2164 pipe_config->lane_count, pipe_config->port_clock,
2165 pipe_config->pipe_bpp,
2166 pipe_config->dsc_params.compressed_bpp);
2167
2168 DRM_DEBUG_KMS("DP link rate required %i available %i\n",
2169 intel_dp_link_required(adjusted_mode->crtc_clock,
2170 pipe_config->dsc_params.compressed_bpp),
2171 intel_dp_max_data_rate(pipe_config->port_clock,
2172 pipe_config->lane_count));
2173 } else {
2174 DRM_DEBUG_KMS("DP lane count %d clock %d bpp %d\n",
2175 pipe_config->lane_count, pipe_config->port_clock,
2176 pipe_config->pipe_bpp);
2177
2178 DRM_DEBUG_KMS("DP link rate required %i available %i\n",
2179 intel_dp_link_required(adjusted_mode->crtc_clock,
2180 pipe_config->pipe_bpp),
2181 intel_dp_max_data_rate(pipe_config->port_clock,
2182 pipe_config->lane_count));
2183 }
2184 return 0;
2185}
2186
2187static int
2188intel_dp_ycbcr420_config(struct intel_dp *intel_dp,
2189 struct drm_connector *connector,
2190 struct intel_crtc_state *crtc_state)
2191{
2192 const struct drm_display_info *info = &connector->display_info;
2193 const struct drm_display_mode *adjusted_mode =
2194 &crtc_state->base.adjusted_mode;
2195 struct intel_crtc *crtc = to_intel_crtc(crtc_state->base.crtc);
2196 int ret;
2197
2198 if (!drm_mode_is_420_only(info, adjusted_mode) ||
2199 !intel_dp_get_colorimetry_status(intel_dp) ||
2200 !connector->ycbcr_420_allowed)
2201 return 0;
2202
2203 crtc_state->output_format = INTEL_OUTPUT_FORMAT_YCBCR420;
2204
2205 /* YCBCR 420 output conversion needs a scaler */
2206 ret = skl_update_scaler_crtc(crtc_state);
2207 if (ret) {
2208 DRM_DEBUG_KMS("Scaler allocation for output failed\n");
2209 return ret;
2210 }
2211
2212 intel_pch_panel_fitting(crtc, crtc_state, DRM_MODE_SCALE_FULLSCREEN);
2213
2214 return 0;
2215}
2216
2217bool intel_dp_limited_color_range(const struct intel_crtc_state *crtc_state,
2218 const struct drm_connector_state *conn_state)
2219{
2220 const struct intel_digital_connector_state *intel_conn_state =
2221 to_intel_digital_connector_state(conn_state);
2222 const struct drm_display_mode *adjusted_mode =
2223 &crtc_state->base.adjusted_mode;
2224
2225 if (intel_conn_state->broadcast_rgb == INTEL_BROADCAST_RGB_AUTO) {
2226 /*
2227 * See:
2228 * CEA-861-E - 5.1 Default Encoding Parameters
2229 * VESA DisplayPort Ver.1.2a - 5.1.1.1 Video Colorimetry
2230 */
2231 return crtc_state->pipe_bpp != 18 &&
2232 drm_default_rgb_quant_range(adjusted_mode) ==
2233 HDMI_QUANTIZATION_RANGE_LIMITED;
2234 } else {
2235 return intel_conn_state->broadcast_rgb ==
2236 INTEL_BROADCAST_RGB_LIMITED;
2237 }
2238}
2239
2240int
2241intel_dp_compute_config(struct intel_encoder *encoder,
2242 struct intel_crtc_state *pipe_config,
2243 struct drm_connector_state *conn_state)
2244{
2245 struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
2246 struct drm_display_mode *adjusted_mode = &pipe_config->base.adjusted_mode;
2247 struct intel_dp *intel_dp = enc_to_intel_dp(&encoder->base);
2248 struct intel_lspcon *lspcon = enc_to_intel_lspcon(&encoder->base);
2249 enum port port = encoder->port;
2250 struct intel_crtc *intel_crtc = to_intel_crtc(pipe_config->base.crtc);
2251 struct intel_connector *intel_connector = intel_dp->attached_connector;
2252 struct intel_digital_connector_state *intel_conn_state =
2253 to_intel_digital_connector_state(conn_state);
2254 bool constant_n = drm_dp_has_quirk(&intel_dp->desc,
2255 DP_DPCD_QUIRK_CONSTANT_N);
2256 int ret = 0, output_bpp;
2257
2258 if (HAS_PCH_SPLIT(dev_priv) && !HAS_DDI(dev_priv) && port != PORT_A)
2259 pipe_config->has_pch_encoder = true;
2260
2261 pipe_config->output_format = INTEL_OUTPUT_FORMAT_RGB;
2262 if (lspcon->active)
2263 lspcon_ycbcr420_config(&intel_connector->base, pipe_config);
2264 else
2265 ret = intel_dp_ycbcr420_config(intel_dp, &intel_connector->base,
2266 pipe_config);
2267
2268 if (ret)
2269 return ret;
2270
2271 pipe_config->has_drrs = false;
2272 if (IS_G4X(dev_priv) || port == PORT_A)
2273 pipe_config->has_audio = false;
2274 else if (intel_conn_state->force_audio == HDMI_AUDIO_AUTO)
2275 pipe_config->has_audio = intel_dp->has_audio;
2276 else
2277 pipe_config->has_audio = intel_conn_state->force_audio == HDMI_AUDIO_ON;
2278
2279 if (intel_dp_is_edp(intel_dp) && intel_connector->panel.fixed_mode) {
2280 intel_fixed_panel_mode(intel_connector->panel.fixed_mode,
2281 adjusted_mode);
2282
2283 if (INTEL_GEN(dev_priv) >= 9) {
2284 ret = skl_update_scaler_crtc(pipe_config);
2285 if (ret)
2286 return ret;
2287 }
2288
2289 if (HAS_GMCH(dev_priv))
2290 intel_gmch_panel_fitting(intel_crtc, pipe_config,
2291 conn_state->scaling_mode);
2292 else
2293 intel_pch_panel_fitting(intel_crtc, pipe_config,
2294 conn_state->scaling_mode);
2295 }
2296
2297 if (adjusted_mode->flags & DRM_MODE_FLAG_DBLSCAN)
2298 return -EINVAL;
2299
2300 if (HAS_GMCH(dev_priv) &&
2301 adjusted_mode->flags & DRM_MODE_FLAG_INTERLACE)
2302 return -EINVAL;
2303
2304 if (adjusted_mode->flags & DRM_MODE_FLAG_DBLCLK)
2305 return -EINVAL;
2306
2307 ret = intel_dp_compute_link_config(encoder, pipe_config, conn_state);
2308 if (ret < 0)
2309 return ret;
2310
2311 pipe_config->limited_color_range =
2312 intel_dp_limited_color_range(pipe_config, conn_state);
2313
2314 if (pipe_config->dsc_params.compression_enable)
2315 output_bpp = pipe_config->dsc_params.compressed_bpp;
2316 else
2317 output_bpp = intel_dp_output_bpp(pipe_config, pipe_config->pipe_bpp);
2318
2319 intel_link_compute_m_n(output_bpp,
2320 pipe_config->lane_count,
2321 adjusted_mode->crtc_clock,
2322 pipe_config->port_clock,
2323 &pipe_config->dp_m_n,
2324 constant_n, pipe_config->fec_enable);
2325
2326 if (intel_connector->panel.downclock_mode != NULL &&
2327 dev_priv->drrs.type == SEAMLESS_DRRS_SUPPORT) {
2328 pipe_config->has_drrs = true;
2329 intel_link_compute_m_n(output_bpp,
2330 pipe_config->lane_count,
2331 intel_connector->panel.downclock_mode->clock,
2332 pipe_config->port_clock,
2333 &pipe_config->dp_m2_n2,
2334 constant_n, pipe_config->fec_enable);
2335 }
2336
2337 if (!HAS_DDI(dev_priv))
2338 intel_dp_set_clock(encoder, pipe_config);
2339
2340 intel_psr_compute_config(intel_dp, pipe_config);
2341
2342 return 0;
2343}
2344
2345void intel_dp_set_link_params(struct intel_dp *intel_dp,
2346 int link_rate, u8 lane_count,
2347 bool link_mst)
2348{
2349 intel_dp->link_trained = false;
2350 intel_dp->link_rate = link_rate;
2351 intel_dp->lane_count = lane_count;
2352 intel_dp->link_mst = link_mst;
2353}
2354
2355static void intel_dp_prepare(struct intel_encoder *encoder,
2356 const struct intel_crtc_state *pipe_config)
2357{
2358 struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
2359 struct intel_dp *intel_dp = enc_to_intel_dp(&encoder->base);
2360 enum port port = encoder->port;
2361 struct intel_crtc *crtc = to_intel_crtc(pipe_config->base.crtc);
2362 const struct drm_display_mode *adjusted_mode = &pipe_config->base.adjusted_mode;
2363
2364 intel_dp_set_link_params(intel_dp, pipe_config->port_clock,
2365 pipe_config->lane_count,
2366 intel_crtc_has_type(pipe_config,
2367 INTEL_OUTPUT_DP_MST));
2368
2369 /*
2370 * There are four kinds of DP registers:
2371 *
2372 * IBX PCH
2373 * SNB CPU
2374 * IVB CPU
2375 * CPT PCH
2376 *
2377 * IBX PCH and CPU are the same for almost everything,
2378 * except that the CPU DP PLL is configured in this
2379 * register
2380 *
2381 * CPT PCH is quite different, having many bits moved
2382 * to the TRANS_DP_CTL register instead. That
2383 * configuration happens (oddly) in ironlake_pch_enable
2384 */
2385
2386 /* Preserve the BIOS-computed detected bit. This is
2387 * supposed to be read-only.
2388 */
2389 intel_dp->DP = I915_READ(intel_dp->output_reg) & DP_DETECTED;
2390
2391 /* Handle DP bits in common between all three register formats */
2392 intel_dp->DP |= DP_VOLTAGE_0_4 | DP_PRE_EMPHASIS_0;
2393 intel_dp->DP |= DP_PORT_WIDTH(pipe_config->lane_count);
2394
2395 /* Split out the IBX/CPU vs CPT settings */
2396
2397 if (IS_IVYBRIDGE(dev_priv) && port == PORT_A) {
2398 if (adjusted_mode->flags & DRM_MODE_FLAG_PHSYNC)
2399 intel_dp->DP |= DP_SYNC_HS_HIGH;
2400 if (adjusted_mode->flags & DRM_MODE_FLAG_PVSYNC)
2401 intel_dp->DP |= DP_SYNC_VS_HIGH;
2402 intel_dp->DP |= DP_LINK_TRAIN_OFF_CPT;
2403
2404 if (drm_dp_enhanced_frame_cap(intel_dp->dpcd))
2405 intel_dp->DP |= DP_ENHANCED_FRAMING;
2406
2407 intel_dp->DP |= DP_PIPE_SEL_IVB(crtc->pipe);
2408 } else if (HAS_PCH_CPT(dev_priv) && port != PORT_A) {
2409 u32 trans_dp;
2410
2411 intel_dp->DP |= DP_LINK_TRAIN_OFF_CPT;
2412
2413 trans_dp = I915_READ(TRANS_DP_CTL(crtc->pipe));
2414 if (drm_dp_enhanced_frame_cap(intel_dp->dpcd))
2415 trans_dp |= TRANS_DP_ENH_FRAMING;
2416 else
2417 trans_dp &= ~TRANS_DP_ENH_FRAMING;
2418 I915_WRITE(TRANS_DP_CTL(crtc->pipe), trans_dp);
2419 } else {
2420 if (IS_G4X(dev_priv) && pipe_config->limited_color_range)
2421 intel_dp->DP |= DP_COLOR_RANGE_16_235;
2422
2423 if (adjusted_mode->flags & DRM_MODE_FLAG_PHSYNC)
2424 intel_dp->DP |= DP_SYNC_HS_HIGH;
2425 if (adjusted_mode->flags & DRM_MODE_FLAG_PVSYNC)
2426 intel_dp->DP |= DP_SYNC_VS_HIGH;
2427 intel_dp->DP |= DP_LINK_TRAIN_OFF;
2428
2429 if (drm_dp_enhanced_frame_cap(intel_dp->dpcd))
2430 intel_dp->DP |= DP_ENHANCED_FRAMING;
2431
2432 if (IS_CHERRYVIEW(dev_priv))
2433 intel_dp->DP |= DP_PIPE_SEL_CHV(crtc->pipe);
2434 else
2435 intel_dp->DP |= DP_PIPE_SEL(crtc->pipe);
2436 }
2437}
2438
2439#define IDLE_ON_MASK (PP_ON | PP_SEQUENCE_MASK | 0 | PP_SEQUENCE_STATE_MASK)
2440#define IDLE_ON_VALUE (PP_ON | PP_SEQUENCE_NONE | 0 | PP_SEQUENCE_STATE_ON_IDLE)
2441
2442#define IDLE_OFF_MASK (PP_ON | PP_SEQUENCE_MASK | 0 | 0)
2443#define IDLE_OFF_VALUE (0 | PP_SEQUENCE_NONE | 0 | 0)
2444
2445#define IDLE_CYCLE_MASK (PP_ON | PP_SEQUENCE_MASK | PP_CYCLE_DELAY_ACTIVE | PP_SEQUENCE_STATE_MASK)
2446#define IDLE_CYCLE_VALUE (0 | PP_SEQUENCE_NONE | 0 | PP_SEQUENCE_STATE_OFF_IDLE)
2447
2448static void intel_pps_verify_state(struct intel_dp *intel_dp);
2449
2450static void wait_panel_status(struct intel_dp *intel_dp,
2451 u32 mask,
2452 u32 value)
2453{
2454 struct drm_i915_private *dev_priv = dp_to_i915(intel_dp);
2455 i915_reg_t pp_stat_reg, pp_ctrl_reg;
2456
2457 lockdep_assert_held(&dev_priv->pps_mutex);
2458
2459 intel_pps_verify_state(intel_dp);
2460
2461 pp_stat_reg = _pp_stat_reg(intel_dp);
2462 pp_ctrl_reg = _pp_ctrl_reg(intel_dp);
2463
2464 DRM_DEBUG_KMS("mask %08x value %08x status %08x control %08x\n",
2465 mask, value,
2466 I915_READ(pp_stat_reg),
2467 I915_READ(pp_ctrl_reg));
2468
2469 if (intel_de_wait_for_register(dev_priv, pp_stat_reg,
2470 mask, value, 5000))
2471 DRM_ERROR("Panel status timeout: status %08x control %08x\n",
2472 I915_READ(pp_stat_reg),
2473 I915_READ(pp_ctrl_reg));
2474
2475 DRM_DEBUG_KMS("Wait complete\n");
2476}
2477
2478static void wait_panel_on(struct intel_dp *intel_dp)
2479{
2480 DRM_DEBUG_KMS("Wait for panel power on\n");
2481 wait_panel_status(intel_dp, IDLE_ON_MASK, IDLE_ON_VALUE);
2482}
2483
2484static void wait_panel_off(struct intel_dp *intel_dp)
2485{
2486 DRM_DEBUG_KMS("Wait for panel power off time\n");
2487 wait_panel_status(intel_dp, IDLE_OFF_MASK, IDLE_OFF_VALUE);
2488}
2489
2490static void wait_panel_power_cycle(struct intel_dp *intel_dp)
2491{
2492 ktime_t panel_power_on_time;
2493 s64 panel_power_off_duration;
2494
2495 DRM_DEBUG_KMS("Wait for panel power cycle\n");
2496
2497 /* take the difference of currrent time and panel power off time
2498 * and then make panel wait for t11_t12 if needed. */
2499 panel_power_on_time = ktime_get_boottime();
2500 panel_power_off_duration = ktime_ms_delta(panel_power_on_time, intel_dp->panel_power_off_time);
2501
2502 /* When we disable the VDD override bit last we have to do the manual
2503 * wait. */
2504 if (panel_power_off_duration < (s64)intel_dp->panel_power_cycle_delay)
2505 wait_remaining_ms_from_jiffies(jiffies,
2506 intel_dp->panel_power_cycle_delay - panel_power_off_duration);
2507
2508 wait_panel_status(intel_dp, IDLE_CYCLE_MASK, IDLE_CYCLE_VALUE);
2509}
2510
2511static void wait_backlight_on(struct intel_dp *intel_dp)
2512{
2513 wait_remaining_ms_from_jiffies(intel_dp->last_power_on,
2514 intel_dp->backlight_on_delay);
2515}
2516
2517static void edp_wait_backlight_off(struct intel_dp *intel_dp)
2518{
2519 wait_remaining_ms_from_jiffies(intel_dp->last_backlight_off,
2520 intel_dp->backlight_off_delay);
2521}
2522
2523/* Read the current pp_control value, unlocking the register if it
2524 * is locked
2525 */
2526
2527static u32 ironlake_get_pp_control(struct intel_dp *intel_dp)
2528{
2529 struct drm_i915_private *dev_priv = dp_to_i915(intel_dp);
2530 u32 control;
2531
2532 lockdep_assert_held(&dev_priv->pps_mutex);
2533
2534 control = I915_READ(_pp_ctrl_reg(intel_dp));
2535 if (WARN_ON(!HAS_DDI(dev_priv) &&
2536 (control & PANEL_UNLOCK_MASK) != PANEL_UNLOCK_REGS)) {
2537 control &= ~PANEL_UNLOCK_MASK;
2538 control |= PANEL_UNLOCK_REGS;
2539 }
2540 return control;
2541}
2542
2543/*
2544 * Must be paired with edp_panel_vdd_off().
2545 * Must hold pps_mutex around the whole on/off sequence.
2546 * Can be nested with intel_edp_panel_vdd_{on,off}() calls.
2547 */
2548static bool edp_panel_vdd_on(struct intel_dp *intel_dp)
2549{
2550 struct drm_i915_private *dev_priv = dp_to_i915(intel_dp);
2551 struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp);
2552 u32 pp;
2553 i915_reg_t pp_stat_reg, pp_ctrl_reg;
2554 bool need_to_disable = !intel_dp->want_panel_vdd;
2555
2556 lockdep_assert_held(&dev_priv->pps_mutex);
2557
2558 if (!intel_dp_is_edp(intel_dp))
2559 return false;
2560
2561 cancel_delayed_work(&intel_dp->panel_vdd_work);
2562 intel_dp->want_panel_vdd = true;
2563
2564 if (edp_have_panel_vdd(intel_dp))
2565 return need_to_disable;
2566
2567 intel_display_power_get(dev_priv,
2568 intel_aux_power_domain(intel_dig_port));
2569
2570 DRM_DEBUG_KMS("Turning eDP port %c VDD on\n",
2571 port_name(intel_dig_port->base.port));
2572
2573 if (!edp_have_panel_power(intel_dp))
2574 wait_panel_power_cycle(intel_dp);
2575
2576 pp = ironlake_get_pp_control(intel_dp);
2577 pp |= EDP_FORCE_VDD;
2578
2579 pp_stat_reg = _pp_stat_reg(intel_dp);
2580 pp_ctrl_reg = _pp_ctrl_reg(intel_dp);
2581
2582 I915_WRITE(pp_ctrl_reg, pp);
2583 POSTING_READ(pp_ctrl_reg);
2584 DRM_DEBUG_KMS("PP_STATUS: 0x%08x PP_CONTROL: 0x%08x\n",
2585 I915_READ(pp_stat_reg), I915_READ(pp_ctrl_reg));
2586 /*
2587 * If the panel wasn't on, delay before accessing aux channel
2588 */
2589 if (!edp_have_panel_power(intel_dp)) {
2590 DRM_DEBUG_KMS("eDP port %c panel power wasn't enabled\n",
2591 port_name(intel_dig_port->base.port));
2592 msleep(intel_dp->panel_power_up_delay);
2593 }
2594
2595 return need_to_disable;
2596}
2597
2598/*
2599 * Must be paired with intel_edp_panel_vdd_off() or
2600 * intel_edp_panel_off().
2601 * Nested calls to these functions are not allowed since
2602 * we drop the lock. Caller must use some higher level
2603 * locking to prevent nested calls from other threads.
2604 */
2605void intel_edp_panel_vdd_on(struct intel_dp *intel_dp)
2606{
2607 intel_wakeref_t wakeref;
2608 bool vdd;
2609
2610 if (!intel_dp_is_edp(intel_dp))
2611 return;
2612
2613 vdd = false;
2614 with_pps_lock(intel_dp, wakeref)
2615 vdd = edp_panel_vdd_on(intel_dp);
2616 I915_STATE_WARN(!vdd, "eDP port %c VDD already requested on\n",
2617 port_name(dp_to_dig_port(intel_dp)->base.port));
2618}
2619
2620static void edp_panel_vdd_off_sync(struct intel_dp *intel_dp)
2621{
2622 struct drm_i915_private *dev_priv = dp_to_i915(intel_dp);
2623 struct intel_digital_port *intel_dig_port =
2624 dp_to_dig_port(intel_dp);
2625 u32 pp;
2626 i915_reg_t pp_stat_reg, pp_ctrl_reg;
2627
2628 lockdep_assert_held(&dev_priv->pps_mutex);
2629
2630 WARN_ON(intel_dp->want_panel_vdd);
2631
2632 if (!edp_have_panel_vdd(intel_dp))
2633 return;
2634
2635 DRM_DEBUG_KMS("Turning eDP port %c VDD off\n",
2636 port_name(intel_dig_port->base.port));
2637
2638 pp = ironlake_get_pp_control(intel_dp);
2639 pp &= ~EDP_FORCE_VDD;
2640
2641 pp_ctrl_reg = _pp_ctrl_reg(intel_dp);
2642 pp_stat_reg = _pp_stat_reg(intel_dp);
2643
2644 I915_WRITE(pp_ctrl_reg, pp);
2645 POSTING_READ(pp_ctrl_reg);
2646
2647 /* Make sure sequencer is idle before allowing subsequent activity */
2648 DRM_DEBUG_KMS("PP_STATUS: 0x%08x PP_CONTROL: 0x%08x\n",
2649 I915_READ(pp_stat_reg), I915_READ(pp_ctrl_reg));
2650
2651 if ((pp & PANEL_POWER_ON) == 0)
2652 intel_dp->panel_power_off_time = ktime_get_boottime();
2653
2654 intel_display_power_put_unchecked(dev_priv,
2655 intel_aux_power_domain(intel_dig_port));
2656}
2657
2658static void edp_panel_vdd_work(struct work_struct *__work)
2659{
2660 struct intel_dp *intel_dp =
2661 container_of(to_delayed_work(__work),
2662 struct intel_dp, panel_vdd_work);
2663 intel_wakeref_t wakeref;
2664
2665 with_pps_lock(intel_dp, wakeref) {
2666 if (!intel_dp->want_panel_vdd)
2667 edp_panel_vdd_off_sync(intel_dp);
2668 }
2669}
2670
2671static void edp_panel_vdd_schedule_off(struct intel_dp *intel_dp)
2672{
2673 unsigned long delay;
2674
2675 /*
2676 * Queue the timer to fire a long time from now (relative to the power
2677 * down delay) to keep the panel power up across a sequence of
2678 * operations.
2679 */
2680 delay = msecs_to_jiffies(intel_dp->panel_power_cycle_delay * 5);
2681 schedule_delayed_work(&intel_dp->panel_vdd_work, delay);
2682}
2683
2684/*
2685 * Must be paired with edp_panel_vdd_on().
2686 * Must hold pps_mutex around the whole on/off sequence.
2687 * Can be nested with intel_edp_panel_vdd_{on,off}() calls.
2688 */
2689static void edp_panel_vdd_off(struct intel_dp *intel_dp, bool sync)
2690{
2691 struct drm_i915_private *dev_priv = dp_to_i915(intel_dp);
2692
2693 lockdep_assert_held(&dev_priv->pps_mutex);
2694
2695 if (!intel_dp_is_edp(intel_dp))
2696 return;
2697
2698 I915_STATE_WARN(!intel_dp->want_panel_vdd, "eDP port %c VDD not forced on",
2699 port_name(dp_to_dig_port(intel_dp)->base.port));
2700
2701 intel_dp->want_panel_vdd = false;
2702
2703 if (sync)
2704 edp_panel_vdd_off_sync(intel_dp);
2705 else
2706 edp_panel_vdd_schedule_off(intel_dp);
2707}
2708
2709static void edp_panel_on(struct intel_dp *intel_dp)
2710{
2711 struct drm_i915_private *dev_priv = dp_to_i915(intel_dp);
2712 u32 pp;
2713 i915_reg_t pp_ctrl_reg;
2714
2715 lockdep_assert_held(&dev_priv->pps_mutex);
2716
2717 if (!intel_dp_is_edp(intel_dp))
2718 return;
2719
2720 DRM_DEBUG_KMS("Turn eDP port %c panel power on\n",
2721 port_name(dp_to_dig_port(intel_dp)->base.port));
2722
2723 if (WARN(edp_have_panel_power(intel_dp),
2724 "eDP port %c panel power already on\n",
2725 port_name(dp_to_dig_port(intel_dp)->base.port)))
2726 return;
2727
2728 wait_panel_power_cycle(intel_dp);
2729
2730 pp_ctrl_reg = _pp_ctrl_reg(intel_dp);
2731 pp = ironlake_get_pp_control(intel_dp);
2732 if (IS_GEN(dev_priv, 5)) {
2733 /* ILK workaround: disable reset around power sequence */
2734 pp &= ~PANEL_POWER_RESET;
2735 I915_WRITE(pp_ctrl_reg, pp);
2736 POSTING_READ(pp_ctrl_reg);
2737 }
2738
2739 pp |= PANEL_POWER_ON;
2740 if (!IS_GEN(dev_priv, 5))
2741 pp |= PANEL_POWER_RESET;
2742
2743 I915_WRITE(pp_ctrl_reg, pp);
2744 POSTING_READ(pp_ctrl_reg);
2745
2746 wait_panel_on(intel_dp);
2747 intel_dp->last_power_on = jiffies;
2748
2749 if (IS_GEN(dev_priv, 5)) {
2750 pp |= PANEL_POWER_RESET; /* restore panel reset bit */
2751 I915_WRITE(pp_ctrl_reg, pp);
2752 POSTING_READ(pp_ctrl_reg);
2753 }
2754}
2755
2756void intel_edp_panel_on(struct intel_dp *intel_dp)
2757{
2758 intel_wakeref_t wakeref;
2759
2760 if (!intel_dp_is_edp(intel_dp))
2761 return;
2762
2763 with_pps_lock(intel_dp, wakeref)
2764 edp_panel_on(intel_dp);
2765}
2766
2767
2768static void edp_panel_off(struct intel_dp *intel_dp)
2769{
2770 struct drm_i915_private *dev_priv = dp_to_i915(intel_dp);
2771 struct intel_digital_port *dig_port = dp_to_dig_port(intel_dp);
2772 u32 pp;
2773 i915_reg_t pp_ctrl_reg;
2774
2775 lockdep_assert_held(&dev_priv->pps_mutex);
2776
2777 if (!intel_dp_is_edp(intel_dp))
2778 return;
2779
2780 DRM_DEBUG_KMS("Turn eDP port %c panel power off\n",
2781 port_name(dig_port->base.port));
2782
2783 WARN(!intel_dp->want_panel_vdd, "Need eDP port %c VDD to turn off panel\n",
2784 port_name(dig_port->base.port));
2785
2786 pp = ironlake_get_pp_control(intel_dp);
2787 /* We need to switch off panel power _and_ force vdd, for otherwise some
2788 * panels get very unhappy and cease to work. */
2789 pp &= ~(PANEL_POWER_ON | PANEL_POWER_RESET | EDP_FORCE_VDD |
2790 EDP_BLC_ENABLE);
2791
2792 pp_ctrl_reg = _pp_ctrl_reg(intel_dp);
2793
2794 intel_dp->want_panel_vdd = false;
2795
2796 I915_WRITE(pp_ctrl_reg, pp);
2797 POSTING_READ(pp_ctrl_reg);
2798
2799 wait_panel_off(intel_dp);
2800 intel_dp->panel_power_off_time = ktime_get_boottime();
2801
2802 /* We got a reference when we enabled the VDD. */
2803 intel_display_power_put_unchecked(dev_priv, intel_aux_power_domain(dig_port));
2804}
2805
2806void intel_edp_panel_off(struct intel_dp *intel_dp)
2807{
2808 intel_wakeref_t wakeref;
2809
2810 if (!intel_dp_is_edp(intel_dp))
2811 return;
2812
2813 with_pps_lock(intel_dp, wakeref)
2814 edp_panel_off(intel_dp);
2815}
2816
2817/* Enable backlight in the panel power control. */
2818static void _intel_edp_backlight_on(struct intel_dp *intel_dp)
2819{
2820 struct drm_i915_private *dev_priv = dp_to_i915(intel_dp);
2821 intel_wakeref_t wakeref;
2822
2823 /*
2824 * If we enable the backlight right away following a panel power
2825 * on, we may see slight flicker as the panel syncs with the eDP
2826 * link. So delay a bit to make sure the image is solid before
2827 * allowing it to appear.
2828 */
2829 wait_backlight_on(intel_dp);
2830
2831 with_pps_lock(intel_dp, wakeref) {
2832 i915_reg_t pp_ctrl_reg = _pp_ctrl_reg(intel_dp);
2833 u32 pp;
2834
2835 pp = ironlake_get_pp_control(intel_dp);
2836 pp |= EDP_BLC_ENABLE;
2837
2838 I915_WRITE(pp_ctrl_reg, pp);
2839 POSTING_READ(pp_ctrl_reg);
2840 }
2841}
2842
2843/* Enable backlight PWM and backlight PP control. */
2844void intel_edp_backlight_on(const struct intel_crtc_state *crtc_state,
2845 const struct drm_connector_state *conn_state)
2846{
2847 struct intel_dp *intel_dp = enc_to_intel_dp(conn_state->best_encoder);
2848
2849 if (!intel_dp_is_edp(intel_dp))
2850 return;
2851
2852 DRM_DEBUG_KMS("\n");
2853
2854 intel_panel_enable_backlight(crtc_state, conn_state);
2855 _intel_edp_backlight_on(intel_dp);
2856}
2857
2858/* Disable backlight in the panel power control. */
2859static void _intel_edp_backlight_off(struct intel_dp *intel_dp)
2860{
2861 struct drm_i915_private *dev_priv = dp_to_i915(intel_dp);
2862 intel_wakeref_t wakeref;
2863
2864 if (!intel_dp_is_edp(intel_dp))
2865 return;
2866
2867 with_pps_lock(intel_dp, wakeref) {
2868 i915_reg_t pp_ctrl_reg = _pp_ctrl_reg(intel_dp);
2869 u32 pp;
2870
2871 pp = ironlake_get_pp_control(intel_dp);
2872 pp &= ~EDP_BLC_ENABLE;
2873
2874 I915_WRITE(pp_ctrl_reg, pp);
2875 POSTING_READ(pp_ctrl_reg);
2876 }
2877
2878 intel_dp->last_backlight_off = jiffies;
2879 edp_wait_backlight_off(intel_dp);
2880}
2881
2882/* Disable backlight PP control and backlight PWM. */
2883void intel_edp_backlight_off(const struct drm_connector_state *old_conn_state)
2884{
2885 struct intel_dp *intel_dp = enc_to_intel_dp(old_conn_state->best_encoder);
2886
2887 if (!intel_dp_is_edp(intel_dp))
2888 return;
2889
2890 DRM_DEBUG_KMS("\n");
2891
2892 _intel_edp_backlight_off(intel_dp);
2893 intel_panel_disable_backlight(old_conn_state);
2894}
2895
2896/*
2897 * Hook for controlling the panel power control backlight through the bl_power
2898 * sysfs attribute. Take care to handle multiple calls.
2899 */
2900static void intel_edp_backlight_power(struct intel_connector *connector,
2901 bool enable)
2902{
2903 struct intel_dp *intel_dp = intel_attached_dp(&connector->base);
2904 intel_wakeref_t wakeref;
2905 bool is_enabled;
2906
2907 is_enabled = false;
2908 with_pps_lock(intel_dp, wakeref)
2909 is_enabled = ironlake_get_pp_control(intel_dp) & EDP_BLC_ENABLE;
2910 if (is_enabled == enable)
2911 return;
2912
2913 DRM_DEBUG_KMS("panel power control backlight %s\n",
2914 enable ? "enable" : "disable");
2915
2916 if (enable)
2917 _intel_edp_backlight_on(intel_dp);
2918 else
2919 _intel_edp_backlight_off(intel_dp);
2920}
2921
2922static void assert_dp_port(struct intel_dp *intel_dp, bool state)
2923{
2924 struct intel_digital_port *dig_port = dp_to_dig_port(intel_dp);
2925 struct drm_i915_private *dev_priv = to_i915(dig_port->base.base.dev);
2926 bool cur_state = I915_READ(intel_dp->output_reg) & DP_PORT_EN;
2927
2928 I915_STATE_WARN(cur_state != state,
2929 "DP port %c state assertion failure (expected %s, current %s)\n",
2930 port_name(dig_port->base.port),
2931 onoff(state), onoff(cur_state));
2932}
2933#define assert_dp_port_disabled(d) assert_dp_port((d), false)
2934
2935static void assert_edp_pll(struct drm_i915_private *dev_priv, bool state)
2936{
2937 bool cur_state = I915_READ(DP_A) & DP_PLL_ENABLE;
2938
2939 I915_STATE_WARN(cur_state != state,
2940 "eDP PLL state assertion failure (expected %s, current %s)\n",
2941 onoff(state), onoff(cur_state));
2942}
2943#define assert_edp_pll_enabled(d) assert_edp_pll((d), true)
2944#define assert_edp_pll_disabled(d) assert_edp_pll((d), false)
2945
2946static void ironlake_edp_pll_on(struct intel_dp *intel_dp,
2947 const struct intel_crtc_state *pipe_config)
2948{
2949 struct intel_crtc *crtc = to_intel_crtc(pipe_config->base.crtc);
2950 struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
2951
2952 assert_pipe_disabled(dev_priv, crtc->pipe);
2953 assert_dp_port_disabled(intel_dp);
2954 assert_edp_pll_disabled(dev_priv);
2955
2956 DRM_DEBUG_KMS("enabling eDP PLL for clock %d\n",
2957 pipe_config->port_clock);
2958
2959 intel_dp->DP &= ~DP_PLL_FREQ_MASK;
2960
2961 if (pipe_config->port_clock == 162000)
2962 intel_dp->DP |= DP_PLL_FREQ_162MHZ;
2963 else
2964 intel_dp->DP |= DP_PLL_FREQ_270MHZ;
2965
2966 I915_WRITE(DP_A, intel_dp->DP);
2967 POSTING_READ(DP_A);
2968 udelay(500);
2969
2970 /*
2971 * [DevILK] Work around required when enabling DP PLL
2972 * while a pipe is enabled going to FDI:
2973 * 1. Wait for the start of vertical blank on the enabled pipe going to FDI
2974 * 2. Program DP PLL enable
2975 */
2976 if (IS_GEN(dev_priv, 5))
2977 intel_wait_for_vblank_if_active(dev_priv, !crtc->pipe);
2978
2979 intel_dp->DP |= DP_PLL_ENABLE;
2980
2981 I915_WRITE(DP_A, intel_dp->DP);
2982 POSTING_READ(DP_A);
2983 udelay(200);
2984}
2985
2986static void ironlake_edp_pll_off(struct intel_dp *intel_dp,
2987 const struct intel_crtc_state *old_crtc_state)
2988{
2989 struct intel_crtc *crtc = to_intel_crtc(old_crtc_state->base.crtc);
2990 struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
2991
2992 assert_pipe_disabled(dev_priv, crtc->pipe);
2993 assert_dp_port_disabled(intel_dp);
2994 assert_edp_pll_enabled(dev_priv);
2995
2996 DRM_DEBUG_KMS("disabling eDP PLL\n");
2997
2998 intel_dp->DP &= ~DP_PLL_ENABLE;
2999
3000 I915_WRITE(DP_A, intel_dp->DP);
3001 POSTING_READ(DP_A);
3002 udelay(200);
3003}
3004
3005static bool downstream_hpd_needs_d0(struct intel_dp *intel_dp)
3006{
3007 /*
3008 * DPCD 1.2+ should support BRANCH_DEVICE_CTRL, and thus
3009 * be capable of signalling downstream hpd with a long pulse.
3010 * Whether or not that means D3 is safe to use is not clear,
3011 * but let's assume so until proven otherwise.
3012 *
3013 * FIXME should really check all downstream ports...
3014 */
3015 return intel_dp->dpcd[DP_DPCD_REV] == 0x11 &&
3016 intel_dp->dpcd[DP_DOWNSTREAMPORT_PRESENT] & DP_DWN_STRM_PORT_PRESENT &&
3017 intel_dp->downstream_ports[0] & DP_DS_PORT_HPD;
3018}
3019
3020void intel_dp_sink_set_decompression_state(struct intel_dp *intel_dp,
3021 const struct intel_crtc_state *crtc_state,
3022 bool enable)
3023{
3024 int ret;
3025
3026 if (!crtc_state->dsc_params.compression_enable)
3027 return;
3028
3029 ret = drm_dp_dpcd_writeb(&intel_dp->aux, DP_DSC_ENABLE,
3030 enable ? DP_DECOMPRESSION_EN : 0);
3031 if (ret < 0)
3032 DRM_DEBUG_KMS("Failed to %s sink decompression state\n",
3033 enable ? "enable" : "disable");
3034}
3035
3036/* If the sink supports it, try to set the power state appropriately */
3037void intel_dp_sink_dpms(struct intel_dp *intel_dp, int mode)
3038{
3039 int ret, i;
3040
3041 /* Should have a valid DPCD by this point */
3042 if (intel_dp->dpcd[DP_DPCD_REV] < 0x11)
3043 return;
3044
3045 if (mode != DRM_MODE_DPMS_ON) {
3046 if (downstream_hpd_needs_d0(intel_dp))
3047 return;
3048
3049 ret = drm_dp_dpcd_writeb(&intel_dp->aux, DP_SET_POWER,
3050 DP_SET_POWER_D3);
3051 } else {
3052 struct intel_lspcon *lspcon = dp_to_lspcon(intel_dp);
3053
3054 /*
3055 * When turning on, we need to retry for 1ms to give the sink
3056 * time to wake up.
3057 */
3058 for (i = 0; i < 3; i++) {
3059 ret = drm_dp_dpcd_writeb(&intel_dp->aux, DP_SET_POWER,
3060 DP_SET_POWER_D0);
3061 if (ret == 1)
3062 break;
3063 msleep(1);
3064 }
3065
3066 if (ret == 1 && lspcon->active)
3067 lspcon_wait_pcon_mode(lspcon);
3068 }
3069
3070 if (ret != 1)
3071 DRM_DEBUG_KMS("failed to %s sink power state\n",
3072 mode == DRM_MODE_DPMS_ON ? "enable" : "disable");
3073}
3074
3075static bool cpt_dp_port_selected(struct drm_i915_private *dev_priv,
3076 enum port port, enum pipe *pipe)
3077{
3078 enum pipe p;
3079
3080 for_each_pipe(dev_priv, p) {
3081 u32 val = I915_READ(TRANS_DP_CTL(p));
3082
3083 if ((val & TRANS_DP_PORT_SEL_MASK) == TRANS_DP_PORT_SEL(port)) {
3084 *pipe = p;
3085 return true;
3086 }
3087 }
3088
3089 DRM_DEBUG_KMS("No pipe for DP port %c found\n", port_name(port));
3090
3091 /* must initialize pipe to something for the asserts */
3092 *pipe = PIPE_A;
3093
3094 return false;
3095}
3096
3097bool intel_dp_port_enabled(struct drm_i915_private *dev_priv,
3098 i915_reg_t dp_reg, enum port port,
3099 enum pipe *pipe)
3100{
3101 bool ret;
3102 u32 val;
3103
3104 val = I915_READ(dp_reg);
3105
3106 ret = val & DP_PORT_EN;
3107
3108 /* asserts want to know the pipe even if the port is disabled */
3109 if (IS_IVYBRIDGE(dev_priv) && port == PORT_A)
3110 *pipe = (val & DP_PIPE_SEL_MASK_IVB) >> DP_PIPE_SEL_SHIFT_IVB;
3111 else if (HAS_PCH_CPT(dev_priv) && port != PORT_A)
3112 ret &= cpt_dp_port_selected(dev_priv, port, pipe);
3113 else if (IS_CHERRYVIEW(dev_priv))
3114 *pipe = (val & DP_PIPE_SEL_MASK_CHV) >> DP_PIPE_SEL_SHIFT_CHV;
3115 else
3116 *pipe = (val & DP_PIPE_SEL_MASK) >> DP_PIPE_SEL_SHIFT;
3117
3118 return ret;
3119}
3120
3121static bool intel_dp_get_hw_state(struct intel_encoder *encoder,
3122 enum pipe *pipe)
3123{
3124 struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
3125 struct intel_dp *intel_dp = enc_to_intel_dp(&encoder->base);
3126 intel_wakeref_t wakeref;
3127 bool ret;
3128
3129 wakeref = intel_display_power_get_if_enabled(dev_priv,
3130 encoder->power_domain);
3131 if (!wakeref)
3132 return false;
3133
3134 ret = intel_dp_port_enabled(dev_priv, intel_dp->output_reg,
3135 encoder->port, pipe);
3136
3137 intel_display_power_put(dev_priv, encoder->power_domain, wakeref);
3138
3139 return ret;
3140}
3141
3142static void intel_dp_get_config(struct intel_encoder *encoder,
3143 struct intel_crtc_state *pipe_config)
3144{
3145 struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
3146 struct intel_dp *intel_dp = enc_to_intel_dp(&encoder->base);
3147 u32 tmp, flags = 0;
3148 enum port port = encoder->port;
3149 struct intel_crtc *crtc = to_intel_crtc(pipe_config->base.crtc);
3150
3151 if (encoder->type == INTEL_OUTPUT_EDP)
3152 pipe_config->output_types |= BIT(INTEL_OUTPUT_EDP);
3153 else
3154 pipe_config->output_types |= BIT(INTEL_OUTPUT_DP);
3155
3156 tmp = I915_READ(intel_dp->output_reg);
3157
3158 pipe_config->has_audio = tmp & DP_AUDIO_OUTPUT_ENABLE && port != PORT_A;
3159
3160 if (HAS_PCH_CPT(dev_priv) && port != PORT_A) {
3161 u32 trans_dp = I915_READ(TRANS_DP_CTL(crtc->pipe));
3162
3163 if (trans_dp & TRANS_DP_HSYNC_ACTIVE_HIGH)
3164 flags |= DRM_MODE_FLAG_PHSYNC;
3165 else
3166 flags |= DRM_MODE_FLAG_NHSYNC;
3167
3168 if (trans_dp & TRANS_DP_VSYNC_ACTIVE_HIGH)
3169 flags |= DRM_MODE_FLAG_PVSYNC;
3170 else
3171 flags |= DRM_MODE_FLAG_NVSYNC;
3172 } else {
3173 if (tmp & DP_SYNC_HS_HIGH)
3174 flags |= DRM_MODE_FLAG_PHSYNC;
3175 else
3176 flags |= DRM_MODE_FLAG_NHSYNC;
3177
3178 if (tmp & DP_SYNC_VS_HIGH)
3179 flags |= DRM_MODE_FLAG_PVSYNC;
3180 else
3181 flags |= DRM_MODE_FLAG_NVSYNC;
3182 }
3183
3184 pipe_config->base.adjusted_mode.flags |= flags;
3185
3186 if (IS_G4X(dev_priv) && tmp & DP_COLOR_RANGE_16_235)
3187 pipe_config->limited_color_range = true;
3188
3189 pipe_config->lane_count =
3190 ((tmp & DP_PORT_WIDTH_MASK) >> DP_PORT_WIDTH_SHIFT) + 1;
3191
3192 intel_dp_get_m_n(crtc, pipe_config);
3193
3194 if (port == PORT_A) {
3195 if ((I915_READ(DP_A) & DP_PLL_FREQ_MASK) == DP_PLL_FREQ_162MHZ)
3196 pipe_config->port_clock = 162000;
3197 else
3198 pipe_config->port_clock = 270000;
3199 }
3200
3201 pipe_config->base.adjusted_mode.crtc_clock =
3202 intel_dotclock_calculate(pipe_config->port_clock,
3203 &pipe_config->dp_m_n);
3204
3205 if (intel_dp_is_edp(intel_dp) && dev_priv->vbt.edp.bpp &&
3206 pipe_config->pipe_bpp > dev_priv->vbt.edp.bpp) {
3207 /*
3208 * This is a big fat ugly hack.
3209 *
3210 * Some machines in UEFI boot mode provide us a VBT that has 18
3211 * bpp and 1.62 GHz link bandwidth for eDP, which for reasons
3212 * unknown we fail to light up. Yet the same BIOS boots up with
3213 * 24 bpp and 2.7 GHz link. Use the same bpp as the BIOS uses as
3214 * max, not what it tells us to use.
3215 *
3216 * Note: This will still be broken if the eDP panel is not lit
3217 * up by the BIOS, and thus we can't get the mode at module
3218 * load.
3219 */
3220 DRM_DEBUG_KMS("pipe has %d bpp for eDP panel, overriding BIOS-provided max %d bpp\n",
3221 pipe_config->pipe_bpp, dev_priv->vbt.edp.bpp);
3222 dev_priv->vbt.edp.bpp = pipe_config->pipe_bpp;
3223 }
3224}
3225
3226static void intel_disable_dp(struct intel_encoder *encoder,
3227 const struct intel_crtc_state *old_crtc_state,
3228 const struct drm_connector_state *old_conn_state)
3229{
3230 struct intel_dp *intel_dp = enc_to_intel_dp(&encoder->base);
3231
3232 intel_dp->link_trained = false;
3233
3234 if (old_crtc_state->has_audio)
3235 intel_audio_codec_disable(encoder,
3236 old_crtc_state, old_conn_state);
3237
3238 /* Make sure the panel is off before trying to change the mode. But also
3239 * ensure that we have vdd while we switch off the panel. */
3240 intel_edp_panel_vdd_on(intel_dp);
3241 intel_edp_backlight_off(old_conn_state);
3242 intel_dp_sink_dpms(intel_dp, DRM_MODE_DPMS_OFF);
3243 intel_edp_panel_off(intel_dp);
3244}
3245
3246static void g4x_disable_dp(struct intel_encoder *encoder,
3247 const struct intel_crtc_state *old_crtc_state,
3248 const struct drm_connector_state *old_conn_state)
3249{
3250 intel_disable_dp(encoder, old_crtc_state, old_conn_state);
3251}
3252
3253static void vlv_disable_dp(struct intel_encoder *encoder,
3254 const struct intel_crtc_state *old_crtc_state,
3255 const struct drm_connector_state *old_conn_state)
3256{
3257 intel_disable_dp(encoder, old_crtc_state, old_conn_state);
3258}
3259
3260static void g4x_post_disable_dp(struct intel_encoder *encoder,
3261 const struct intel_crtc_state *old_crtc_state,
3262 const struct drm_connector_state *old_conn_state)
3263{
3264 struct intel_dp *intel_dp = enc_to_intel_dp(&encoder->base);
3265 enum port port = encoder->port;
3266
3267 /*
3268 * Bspec does not list a specific disable sequence for g4x DP.
3269 * Follow the ilk+ sequence (disable pipe before the port) for
3270 * g4x DP as it does not suffer from underruns like the normal
3271 * g4x modeset sequence (disable pipe after the port).
3272 */
3273 intel_dp_link_down(encoder, old_crtc_state);
3274
3275 /* Only ilk+ has port A */
3276 if (port == PORT_A)
3277 ironlake_edp_pll_off(intel_dp, old_crtc_state);
3278}
3279
3280static void vlv_post_disable_dp(struct intel_encoder *encoder,
3281 const struct intel_crtc_state *old_crtc_state,
3282 const struct drm_connector_state *old_conn_state)
3283{
3284 intel_dp_link_down(encoder, old_crtc_state);
3285}
3286
3287static void chv_post_disable_dp(struct intel_encoder *encoder,
3288 const struct intel_crtc_state *old_crtc_state,
3289 const struct drm_connector_state *old_conn_state)
3290{
3291 struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
3292
3293 intel_dp_link_down(encoder, old_crtc_state);
3294
3295 vlv_dpio_get(dev_priv);
3296
3297 /* Assert data lane reset */
3298 chv_data_lane_soft_reset(encoder, old_crtc_state, true);
3299
3300 vlv_dpio_put(dev_priv);
3301}
3302
3303static void
3304_intel_dp_set_link_train(struct intel_dp *intel_dp,
3305 u32 *DP,
3306 u8 dp_train_pat)
3307{
3308 struct drm_i915_private *dev_priv = dp_to_i915(intel_dp);
3309 struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp);
3310 enum port port = intel_dig_port->base.port;
3311 u8 train_pat_mask = drm_dp_training_pattern_mask(intel_dp->dpcd);
3312
3313 if (dp_train_pat & train_pat_mask)
3314 DRM_DEBUG_KMS("Using DP training pattern TPS%d\n",
3315 dp_train_pat & train_pat_mask);
3316
3317 if (HAS_DDI(dev_priv)) {
3318 u32 temp = I915_READ(DP_TP_CTL(port));
3319
3320 if (dp_train_pat & DP_LINK_SCRAMBLING_DISABLE)
3321 temp |= DP_TP_CTL_SCRAMBLE_DISABLE;
3322 else
3323 temp &= ~DP_TP_CTL_SCRAMBLE_DISABLE;
3324
3325 temp &= ~DP_TP_CTL_LINK_TRAIN_MASK;
3326 switch (dp_train_pat & train_pat_mask) {
3327 case DP_TRAINING_PATTERN_DISABLE:
3328 temp |= DP_TP_CTL_LINK_TRAIN_NORMAL;
3329
3330 break;
3331 case DP_TRAINING_PATTERN_1:
3332 temp |= DP_TP_CTL_LINK_TRAIN_PAT1;
3333 break;
3334 case DP_TRAINING_PATTERN_2:
3335 temp |= DP_TP_CTL_LINK_TRAIN_PAT2;
3336 break;
3337 case DP_TRAINING_PATTERN_3:
3338 temp |= DP_TP_CTL_LINK_TRAIN_PAT3;
3339 break;
3340 case DP_TRAINING_PATTERN_4:
3341 temp |= DP_TP_CTL_LINK_TRAIN_PAT4;
3342 break;
3343 }
3344 I915_WRITE(DP_TP_CTL(port), temp);
3345
3346 } else if ((IS_IVYBRIDGE(dev_priv) && port == PORT_A) ||
3347 (HAS_PCH_CPT(dev_priv) && port != PORT_A)) {
3348 *DP &= ~DP_LINK_TRAIN_MASK_CPT;
3349
3350 switch (dp_train_pat & DP_TRAINING_PATTERN_MASK) {
3351 case DP_TRAINING_PATTERN_DISABLE:
3352 *DP |= DP_LINK_TRAIN_OFF_CPT;
3353 break;
3354 case DP_TRAINING_PATTERN_1:
3355 *DP |= DP_LINK_TRAIN_PAT_1_CPT;
3356 break;
3357 case DP_TRAINING_PATTERN_2:
3358 *DP |= DP_LINK_TRAIN_PAT_2_CPT;
3359 break;
3360 case DP_TRAINING_PATTERN_3:
3361 DRM_DEBUG_KMS("TPS3 not supported, using TPS2 instead\n");
3362 *DP |= DP_LINK_TRAIN_PAT_2_CPT;
3363 break;
3364 }
3365
3366 } else {
3367 *DP &= ~DP_LINK_TRAIN_MASK;
3368
3369 switch (dp_train_pat & DP_TRAINING_PATTERN_MASK) {
3370 case DP_TRAINING_PATTERN_DISABLE:
3371 *DP |= DP_LINK_TRAIN_OFF;
3372 break;
3373 case DP_TRAINING_PATTERN_1:
3374 *DP |= DP_LINK_TRAIN_PAT_1;
3375 break;
3376 case DP_TRAINING_PATTERN_2:
3377 *DP |= DP_LINK_TRAIN_PAT_2;
3378 break;
3379 case DP_TRAINING_PATTERN_3:
3380 DRM_DEBUG_KMS("TPS3 not supported, using TPS2 instead\n");
3381 *DP |= DP_LINK_TRAIN_PAT_2;
3382 break;
3383 }
3384 }
3385}
3386
3387static void intel_dp_enable_port(struct intel_dp *intel_dp,
3388 const struct intel_crtc_state *old_crtc_state)
3389{
3390 struct drm_i915_private *dev_priv = dp_to_i915(intel_dp);
3391
3392 /* enable with pattern 1 (as per spec) */
3393
3394 intel_dp_program_link_training_pattern(intel_dp, DP_TRAINING_PATTERN_1);
3395
3396 /*
3397 * Magic for VLV/CHV. We _must_ first set up the register
3398 * without actually enabling the port, and then do another
3399 * write to enable the port. Otherwise link training will
3400 * fail when the power sequencer is freshly used for this port.
3401 */
3402 intel_dp->DP |= DP_PORT_EN;
3403 if (old_crtc_state->has_audio)
3404 intel_dp->DP |= DP_AUDIO_OUTPUT_ENABLE;
3405
3406 I915_WRITE(intel_dp->output_reg, intel_dp->DP);
3407 POSTING_READ(intel_dp->output_reg);
3408}
3409
3410static void intel_enable_dp(struct intel_encoder *encoder,
3411 const struct intel_crtc_state *pipe_config,
3412 const struct drm_connector_state *conn_state)
3413{
3414 struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
3415 struct intel_dp *intel_dp = enc_to_intel_dp(&encoder->base);
3416 struct intel_crtc *crtc = to_intel_crtc(pipe_config->base.crtc);
3417 u32 dp_reg = I915_READ(intel_dp->output_reg);
3418 enum pipe pipe = crtc->pipe;
3419 intel_wakeref_t wakeref;
3420
3421 if (WARN_ON(dp_reg & DP_PORT_EN))
3422 return;
3423
3424 with_pps_lock(intel_dp, wakeref) {
3425 if (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv))
3426 vlv_init_panel_power_sequencer(encoder, pipe_config);
3427
3428 intel_dp_enable_port(intel_dp, pipe_config);
3429
3430 edp_panel_vdd_on(intel_dp);
3431 edp_panel_on(intel_dp);
3432 edp_panel_vdd_off(intel_dp, true);
3433 }
3434
3435 if (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv)) {
3436 unsigned int lane_mask = 0x0;
3437
3438 if (IS_CHERRYVIEW(dev_priv))
3439 lane_mask = intel_dp_unused_lane_mask(pipe_config->lane_count);
3440
3441 vlv_wait_port_ready(dev_priv, dp_to_dig_port(intel_dp),
3442 lane_mask);
3443 }
3444
3445 intel_dp_sink_dpms(intel_dp, DRM_MODE_DPMS_ON);
3446 intel_dp_start_link_train(intel_dp);
3447 intel_dp_stop_link_train(intel_dp);
3448
3449 if (pipe_config->has_audio) {
3450 DRM_DEBUG_DRIVER("Enabling DP audio on pipe %c\n",
3451 pipe_name(pipe));
3452 intel_audio_codec_enable(encoder, pipe_config, conn_state);
3453 }
3454}
3455
3456static void g4x_enable_dp(struct intel_encoder *encoder,
3457 const struct intel_crtc_state *pipe_config,
3458 const struct drm_connector_state *conn_state)
3459{
3460 intel_enable_dp(encoder, pipe_config, conn_state);
3461 intel_edp_backlight_on(pipe_config, conn_state);
3462}
3463
3464static void vlv_enable_dp(struct intel_encoder *encoder,
3465 const struct intel_crtc_state *pipe_config,
3466 const struct drm_connector_state *conn_state)
3467{
3468 intel_edp_backlight_on(pipe_config, conn_state);
3469}
3470
3471static void g4x_pre_enable_dp(struct intel_encoder *encoder,
3472 const struct intel_crtc_state *pipe_config,
3473 const struct drm_connector_state *conn_state)
3474{
3475 struct intel_dp *intel_dp = enc_to_intel_dp(&encoder->base);
3476 enum port port = encoder->port;
3477
3478 intel_dp_prepare(encoder, pipe_config);
3479
3480 /* Only ilk+ has port A */
3481 if (port == PORT_A)
3482 ironlake_edp_pll_on(intel_dp, pipe_config);
3483}
3484
3485static void vlv_detach_power_sequencer(struct intel_dp *intel_dp)
3486{
3487 struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp);
3488 struct drm_i915_private *dev_priv = to_i915(intel_dig_port->base.base.dev);
3489 enum pipe pipe = intel_dp->pps_pipe;
3490 i915_reg_t pp_on_reg = PP_ON_DELAYS(pipe);
3491
3492 WARN_ON(intel_dp->active_pipe != INVALID_PIPE);
3493
3494 if (WARN_ON(pipe != PIPE_A && pipe != PIPE_B))
3495 return;
3496
3497 edp_panel_vdd_off_sync(intel_dp);
3498
3499 /*
3500 * VLV seems to get confused when multiple power sequencers
3501 * have the same port selected (even if only one has power/vdd
3502 * enabled). The failure manifests as vlv_wait_port_ready() failing
3503 * CHV on the other hand doesn't seem to mind having the same port
3504 * selected in multiple power sequencers, but let's clear the
3505 * port select always when logically disconnecting a power sequencer
3506 * from a port.
3507 */
3508 DRM_DEBUG_KMS("detaching pipe %c power sequencer from port %c\n",
3509 pipe_name(pipe), port_name(intel_dig_port->base.port));
3510 I915_WRITE(pp_on_reg, 0);
3511 POSTING_READ(pp_on_reg);
3512
3513 intel_dp->pps_pipe = INVALID_PIPE;
3514}
3515
3516static void vlv_steal_power_sequencer(struct drm_i915_private *dev_priv,
3517 enum pipe pipe)
3518{
3519 struct intel_encoder *encoder;
3520
3521 lockdep_assert_held(&dev_priv->pps_mutex);
3522
3523 for_each_intel_dp(&dev_priv->drm, encoder) {
3524 struct intel_dp *intel_dp = enc_to_intel_dp(&encoder->base);
3525 enum port port = encoder->port;
3526
3527 WARN(intel_dp->active_pipe == pipe,
3528 "stealing pipe %c power sequencer from active (e)DP port %c\n",
3529 pipe_name(pipe), port_name(port));
3530
3531 if (intel_dp->pps_pipe != pipe)
3532 continue;
3533
3534 DRM_DEBUG_KMS("stealing pipe %c power sequencer from port %c\n",
3535 pipe_name(pipe), port_name(port));
3536
3537 /* make sure vdd is off before we steal it */
3538 vlv_detach_power_sequencer(intel_dp);
3539 }
3540}
3541
3542static void vlv_init_panel_power_sequencer(struct intel_encoder *encoder,
3543 const struct intel_crtc_state *crtc_state)
3544{
3545 struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
3546 struct intel_dp *intel_dp = enc_to_intel_dp(&encoder->base);
3547 struct intel_crtc *crtc = to_intel_crtc(crtc_state->base.crtc);
3548
3549 lockdep_assert_held(&dev_priv->pps_mutex);
3550
3551 WARN_ON(intel_dp->active_pipe != INVALID_PIPE);
3552
3553 if (intel_dp->pps_pipe != INVALID_PIPE &&
3554 intel_dp->pps_pipe != crtc->pipe) {
3555 /*
3556 * If another power sequencer was being used on this
3557 * port previously make sure to turn off vdd there while
3558 * we still have control of it.
3559 */
3560 vlv_detach_power_sequencer(intel_dp);
3561 }
3562
3563 /*
3564 * We may be stealing the power
3565 * sequencer from another port.
3566 */
3567 vlv_steal_power_sequencer(dev_priv, crtc->pipe);
3568
3569 intel_dp->active_pipe = crtc->pipe;
3570
3571 if (!intel_dp_is_edp(intel_dp))
3572 return;
3573
3574 /* now it's all ours */
3575 intel_dp->pps_pipe = crtc->pipe;
3576
3577 DRM_DEBUG_KMS("initializing pipe %c power sequencer for port %c\n",
3578 pipe_name(intel_dp->pps_pipe), port_name(encoder->port));
3579
3580 /* init power sequencer on this pipe and port */
3581 intel_dp_init_panel_power_sequencer(intel_dp);
3582 intel_dp_init_panel_power_sequencer_registers(intel_dp, true);
3583}
3584
3585static void vlv_pre_enable_dp(struct intel_encoder *encoder,
3586 const struct intel_crtc_state *pipe_config,
3587 const struct drm_connector_state *conn_state)
3588{
3589 vlv_phy_pre_encoder_enable(encoder, pipe_config);
3590
3591 intel_enable_dp(encoder, pipe_config, conn_state);
3592}
3593
3594static void vlv_dp_pre_pll_enable(struct intel_encoder *encoder,
3595 const struct intel_crtc_state *pipe_config,
3596 const struct drm_connector_state *conn_state)
3597{
3598 intel_dp_prepare(encoder, pipe_config);
3599
3600 vlv_phy_pre_pll_enable(encoder, pipe_config);
3601}
3602
3603static void chv_pre_enable_dp(struct intel_encoder *encoder,
3604 const struct intel_crtc_state *pipe_config,
3605 const struct drm_connector_state *conn_state)
3606{
3607 chv_phy_pre_encoder_enable(encoder, pipe_config);
3608
3609 intel_enable_dp(encoder, pipe_config, conn_state);
3610
3611 /* Second common lane will stay alive on its own now */
3612 chv_phy_release_cl2_override(encoder);
3613}
3614
3615static void chv_dp_pre_pll_enable(struct intel_encoder *encoder,
3616 const struct intel_crtc_state *pipe_config,
3617 const struct drm_connector_state *conn_state)
3618{
3619 intel_dp_prepare(encoder, pipe_config);
3620
3621 chv_phy_pre_pll_enable(encoder, pipe_config);
3622}
3623
3624static void chv_dp_post_pll_disable(struct intel_encoder *encoder,
3625 const struct intel_crtc_state *old_crtc_state,
3626 const struct drm_connector_state *old_conn_state)
3627{
3628 chv_phy_post_pll_disable(encoder, old_crtc_state);
3629}
3630
3631/*
3632 * Fetch AUX CH registers 0x202 - 0x207 which contain
3633 * link status information
3634 */
3635bool
3636intel_dp_get_link_status(struct intel_dp *intel_dp, u8 link_status[DP_LINK_STATUS_SIZE])
3637{
3638 return drm_dp_dpcd_read(&intel_dp->aux, DP_LANE0_1_STATUS, link_status,
3639 DP_LINK_STATUS_SIZE) == DP_LINK_STATUS_SIZE;
3640}
3641
3642/* These are source-specific values. */
3643u8
3644intel_dp_voltage_max(struct intel_dp *intel_dp)
3645{
3646 struct drm_i915_private *dev_priv = dp_to_i915(intel_dp);
3647 struct intel_encoder *encoder = &dp_to_dig_port(intel_dp)->base;
3648 enum port port = encoder->port;
3649
3650 if (HAS_DDI(dev_priv))
3651 return intel_ddi_dp_voltage_max(encoder);
3652 else if (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv))
3653 return DP_TRAIN_VOLTAGE_SWING_LEVEL_3;
3654 else if (IS_IVYBRIDGE(dev_priv) && port == PORT_A)
3655 return DP_TRAIN_VOLTAGE_SWING_LEVEL_2;
3656 else if (HAS_PCH_CPT(dev_priv) && port != PORT_A)
3657 return DP_TRAIN_VOLTAGE_SWING_LEVEL_3;
3658 else
3659 return DP_TRAIN_VOLTAGE_SWING_LEVEL_2;
3660}
3661
3662u8
3663intel_dp_pre_emphasis_max(struct intel_dp *intel_dp, u8 voltage_swing)
3664{
3665 struct drm_i915_private *dev_priv = dp_to_i915(intel_dp);
3666 struct intel_encoder *encoder = &dp_to_dig_port(intel_dp)->base;
3667 enum port port = encoder->port;
3668
3669 if (HAS_DDI(dev_priv)) {
3670 return intel_ddi_dp_pre_emphasis_max(encoder, voltage_swing);
3671 } else if (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv)) {
3672 switch (voltage_swing & DP_TRAIN_VOLTAGE_SWING_MASK) {
3673 case DP_TRAIN_VOLTAGE_SWING_LEVEL_0:
3674 return DP_TRAIN_PRE_EMPH_LEVEL_3;
3675 case DP_TRAIN_VOLTAGE_SWING_LEVEL_1:
3676 return DP_TRAIN_PRE_EMPH_LEVEL_2;
3677 case DP_TRAIN_VOLTAGE_SWING_LEVEL_2:
3678 return DP_TRAIN_PRE_EMPH_LEVEL_1;
3679 case DP_TRAIN_VOLTAGE_SWING_LEVEL_3:
3680 default:
3681 return DP_TRAIN_PRE_EMPH_LEVEL_0;
3682 }
3683 } else if (IS_IVYBRIDGE(dev_priv) && port == PORT_A) {
3684 switch (voltage_swing & DP_TRAIN_VOLTAGE_SWING_MASK) {
3685 case DP_TRAIN_VOLTAGE_SWING_LEVEL_0:
3686 return DP_TRAIN_PRE_EMPH_LEVEL_2;
3687 case DP_TRAIN_VOLTAGE_SWING_LEVEL_1:
3688 case DP_TRAIN_VOLTAGE_SWING_LEVEL_2:
3689 return DP_TRAIN_PRE_EMPH_LEVEL_1;
3690 default:
3691 return DP_TRAIN_PRE_EMPH_LEVEL_0;
3692 }
3693 } else {
3694 switch (voltage_swing & DP_TRAIN_VOLTAGE_SWING_MASK) {
3695 case DP_TRAIN_VOLTAGE_SWING_LEVEL_0:
3696 return DP_TRAIN_PRE_EMPH_LEVEL_2;
3697 case DP_TRAIN_VOLTAGE_SWING_LEVEL_1:
3698 return DP_TRAIN_PRE_EMPH_LEVEL_2;
3699 case DP_TRAIN_VOLTAGE_SWING_LEVEL_2:
3700 return DP_TRAIN_PRE_EMPH_LEVEL_1;
3701 case DP_TRAIN_VOLTAGE_SWING_LEVEL_3:
3702 default:
3703 return DP_TRAIN_PRE_EMPH_LEVEL_0;
3704 }
3705 }
3706}
3707
3708static u32 vlv_signal_levels(struct intel_dp *intel_dp)
3709{
3710 struct intel_encoder *encoder = &dp_to_dig_port(intel_dp)->base;
3711 unsigned long demph_reg_value, preemph_reg_value,
3712 uniqtranscale_reg_value;
3713 u8 train_set = intel_dp->train_set[0];
3714
3715 switch (train_set & DP_TRAIN_PRE_EMPHASIS_MASK) {
3716 case DP_TRAIN_PRE_EMPH_LEVEL_0:
3717 preemph_reg_value = 0x0004000;
3718 switch (train_set & DP_TRAIN_VOLTAGE_SWING_MASK) {
3719 case DP_TRAIN_VOLTAGE_SWING_LEVEL_0:
3720 demph_reg_value = 0x2B405555;
3721 uniqtranscale_reg_value = 0x552AB83A;
3722 break;
3723 case DP_TRAIN_VOLTAGE_SWING_LEVEL_1:
3724 demph_reg_value = 0x2B404040;
3725 uniqtranscale_reg_value = 0x5548B83A;
3726 break;
3727 case DP_TRAIN_VOLTAGE_SWING_LEVEL_2:
3728 demph_reg_value = 0x2B245555;
3729 uniqtranscale_reg_value = 0x5560B83A;
3730 break;
3731 case DP_TRAIN_VOLTAGE_SWING_LEVEL_3:
3732 demph_reg_value = 0x2B405555;
3733 uniqtranscale_reg_value = 0x5598DA3A;
3734 break;
3735 default:
3736 return 0;
3737 }
3738 break;
3739 case DP_TRAIN_PRE_EMPH_LEVEL_1:
3740 preemph_reg_value = 0x0002000;
3741 switch (train_set & DP_TRAIN_VOLTAGE_SWING_MASK) {
3742 case DP_TRAIN_VOLTAGE_SWING_LEVEL_0:
3743 demph_reg_value = 0x2B404040;
3744 uniqtranscale_reg_value = 0x5552B83A;
3745 break;
3746 case DP_TRAIN_VOLTAGE_SWING_LEVEL_1:
3747 demph_reg_value = 0x2B404848;
3748 uniqtranscale_reg_value = 0x5580B83A;
3749 break;
3750 case DP_TRAIN_VOLTAGE_SWING_LEVEL_2:
3751 demph_reg_value = 0x2B404040;
3752 uniqtranscale_reg_value = 0x55ADDA3A;
3753 break;
3754 default:
3755 return 0;
3756 }
3757 break;
3758 case DP_TRAIN_PRE_EMPH_LEVEL_2:
3759 preemph_reg_value = 0x0000000;
3760 switch (train_set & DP_TRAIN_VOLTAGE_SWING_MASK) {
3761 case DP_TRAIN_VOLTAGE_SWING_LEVEL_0:
3762 demph_reg_value = 0x2B305555;
3763 uniqtranscale_reg_value = 0x5570B83A;
3764 break;
3765 case DP_TRAIN_VOLTAGE_SWING_LEVEL_1:
3766 demph_reg_value = 0x2B2B4040;
3767 uniqtranscale_reg_value = 0x55ADDA3A;
3768 break;
3769 default:
3770 return 0;
3771 }
3772 break;
3773 case DP_TRAIN_PRE_EMPH_LEVEL_3:
3774 preemph_reg_value = 0x0006000;
3775 switch (train_set & DP_TRAIN_VOLTAGE_SWING_MASK) {
3776 case DP_TRAIN_VOLTAGE_SWING_LEVEL_0:
3777 demph_reg_value = 0x1B405555;
3778 uniqtranscale_reg_value = 0x55ADDA3A;
3779 break;
3780 default:
3781 return 0;
3782 }
3783 break;
3784 default:
3785 return 0;
3786 }
3787
3788 vlv_set_phy_signal_level(encoder, demph_reg_value, preemph_reg_value,
3789 uniqtranscale_reg_value, 0);
3790
3791 return 0;
3792}
3793
3794static u32 chv_signal_levels(struct intel_dp *intel_dp)
3795{
3796 struct intel_encoder *encoder = &dp_to_dig_port(intel_dp)->base;
3797 u32 deemph_reg_value, margin_reg_value;
3798 bool uniq_trans_scale = false;
3799 u8 train_set = intel_dp->train_set[0];
3800
3801 switch (train_set & DP_TRAIN_PRE_EMPHASIS_MASK) {
3802 case DP_TRAIN_PRE_EMPH_LEVEL_0:
3803 switch (train_set & DP_TRAIN_VOLTAGE_SWING_MASK) {
3804 case DP_TRAIN_VOLTAGE_SWING_LEVEL_0:
3805 deemph_reg_value = 128;
3806 margin_reg_value = 52;
3807 break;
3808 case DP_TRAIN_VOLTAGE_SWING_LEVEL_1:
3809 deemph_reg_value = 128;
3810 margin_reg_value = 77;
3811 break;
3812 case DP_TRAIN_VOLTAGE_SWING_LEVEL_2:
3813 deemph_reg_value = 128;
3814 margin_reg_value = 102;
3815 break;
3816 case DP_TRAIN_VOLTAGE_SWING_LEVEL_3:
3817 deemph_reg_value = 128;
3818 margin_reg_value = 154;
3819 uniq_trans_scale = true;
3820 break;
3821 default:
3822 return 0;
3823 }
3824 break;
3825 case DP_TRAIN_PRE_EMPH_LEVEL_1:
3826 switch (train_set & DP_TRAIN_VOLTAGE_SWING_MASK) {
3827 case DP_TRAIN_VOLTAGE_SWING_LEVEL_0:
3828 deemph_reg_value = 85;
3829 margin_reg_value = 78;
3830 break;
3831 case DP_TRAIN_VOLTAGE_SWING_LEVEL_1:
3832 deemph_reg_value = 85;
3833 margin_reg_value = 116;
3834 break;
3835 case DP_TRAIN_VOLTAGE_SWING_LEVEL_2:
3836 deemph_reg_value = 85;
3837 margin_reg_value = 154;
3838 break;
3839 default:
3840 return 0;
3841 }
3842 break;
3843 case DP_TRAIN_PRE_EMPH_LEVEL_2:
3844 switch (train_set & DP_TRAIN_VOLTAGE_SWING_MASK) {
3845 case DP_TRAIN_VOLTAGE_SWING_LEVEL_0:
3846 deemph_reg_value = 64;
3847 margin_reg_value = 104;
3848 break;
3849 case DP_TRAIN_VOLTAGE_SWING_LEVEL_1:
3850 deemph_reg_value = 64;
3851 margin_reg_value = 154;
3852 break;
3853 default:
3854 return 0;
3855 }
3856 break;
3857 case DP_TRAIN_PRE_EMPH_LEVEL_3:
3858 switch (train_set & DP_TRAIN_VOLTAGE_SWING_MASK) {
3859 case DP_TRAIN_VOLTAGE_SWING_LEVEL_0:
3860 deemph_reg_value = 43;
3861 margin_reg_value = 154;
3862 break;
3863 default:
3864 return 0;
3865 }
3866 break;
3867 default:
3868 return 0;
3869 }
3870
3871 chv_set_phy_signal_level(encoder, deemph_reg_value,
3872 margin_reg_value, uniq_trans_scale);
3873
3874 return 0;
3875}
3876
3877static u32
3878g4x_signal_levels(u8 train_set)
3879{
3880 u32 signal_levels = 0;
3881
3882 switch (train_set & DP_TRAIN_VOLTAGE_SWING_MASK) {
3883 case DP_TRAIN_VOLTAGE_SWING_LEVEL_0:
3884 default:
3885 signal_levels |= DP_VOLTAGE_0_4;
3886 break;
3887 case DP_TRAIN_VOLTAGE_SWING_LEVEL_1:
3888 signal_levels |= DP_VOLTAGE_0_6;
3889 break;
3890 case DP_TRAIN_VOLTAGE_SWING_LEVEL_2:
3891 signal_levels |= DP_VOLTAGE_0_8;
3892 break;
3893 case DP_TRAIN_VOLTAGE_SWING_LEVEL_3:
3894 signal_levels |= DP_VOLTAGE_1_2;
3895 break;
3896 }
3897 switch (train_set & DP_TRAIN_PRE_EMPHASIS_MASK) {
3898 case DP_TRAIN_PRE_EMPH_LEVEL_0:
3899 default:
3900 signal_levels |= DP_PRE_EMPHASIS_0;
3901 break;
3902 case DP_TRAIN_PRE_EMPH_LEVEL_1:
3903 signal_levels |= DP_PRE_EMPHASIS_3_5;
3904 break;
3905 case DP_TRAIN_PRE_EMPH_LEVEL_2:
3906 signal_levels |= DP_PRE_EMPHASIS_6;
3907 break;
3908 case DP_TRAIN_PRE_EMPH_LEVEL_3:
3909 signal_levels |= DP_PRE_EMPHASIS_9_5;
3910 break;
3911 }
3912 return signal_levels;
3913}
3914
3915/* SNB CPU eDP voltage swing and pre-emphasis control */
3916static u32
3917snb_cpu_edp_signal_levels(u8 train_set)
3918{
3919 int signal_levels = train_set & (DP_TRAIN_VOLTAGE_SWING_MASK |
3920 DP_TRAIN_PRE_EMPHASIS_MASK);
3921 switch (signal_levels) {
3922 case DP_TRAIN_VOLTAGE_SWING_LEVEL_0 | DP_TRAIN_PRE_EMPH_LEVEL_0:
3923 case DP_TRAIN_VOLTAGE_SWING_LEVEL_1 | DP_TRAIN_PRE_EMPH_LEVEL_0:
3924 return EDP_LINK_TRAIN_400_600MV_0DB_SNB_B;
3925 case DP_TRAIN_VOLTAGE_SWING_LEVEL_0 | DP_TRAIN_PRE_EMPH_LEVEL_1:
3926 return EDP_LINK_TRAIN_400MV_3_5DB_SNB_B;
3927 case DP_TRAIN_VOLTAGE_SWING_LEVEL_0 | DP_TRAIN_PRE_EMPH_LEVEL_2:
3928 case DP_TRAIN_VOLTAGE_SWING_LEVEL_1 | DP_TRAIN_PRE_EMPH_LEVEL_2:
3929 return EDP_LINK_TRAIN_400_600MV_6DB_SNB_B;
3930 case DP_TRAIN_VOLTAGE_SWING_LEVEL_1 | DP_TRAIN_PRE_EMPH_LEVEL_1:
3931 case DP_TRAIN_VOLTAGE_SWING_LEVEL_2 | DP_TRAIN_PRE_EMPH_LEVEL_1:
3932 return EDP_LINK_TRAIN_600_800MV_3_5DB_SNB_B;
3933 case DP_TRAIN_VOLTAGE_SWING_LEVEL_2 | DP_TRAIN_PRE_EMPH_LEVEL_0:
3934 case DP_TRAIN_VOLTAGE_SWING_LEVEL_3 | DP_TRAIN_PRE_EMPH_LEVEL_0:
3935 return EDP_LINK_TRAIN_800_1200MV_0DB_SNB_B;
3936 default:
3937 DRM_DEBUG_KMS("Unsupported voltage swing/pre-emphasis level:"
3938 "0x%x\n", signal_levels);
3939 return EDP_LINK_TRAIN_400_600MV_0DB_SNB_B;
3940 }
3941}
3942
3943/* IVB CPU eDP voltage swing and pre-emphasis control */
3944static u32
3945ivb_cpu_edp_signal_levels(u8 train_set)
3946{
3947 int signal_levels = train_set & (DP_TRAIN_VOLTAGE_SWING_MASK |
3948 DP_TRAIN_PRE_EMPHASIS_MASK);
3949 switch (signal_levels) {
3950 case DP_TRAIN_VOLTAGE_SWING_LEVEL_0 | DP_TRAIN_PRE_EMPH_LEVEL_0:
3951 return EDP_LINK_TRAIN_400MV_0DB_IVB;
3952 case DP_TRAIN_VOLTAGE_SWING_LEVEL_0 | DP_TRAIN_PRE_EMPH_LEVEL_1:
3953 return EDP_LINK_TRAIN_400MV_3_5DB_IVB;
3954 case DP_TRAIN_VOLTAGE_SWING_LEVEL_0 | DP_TRAIN_PRE_EMPH_LEVEL_2:
3955 return EDP_LINK_TRAIN_400MV_6DB_IVB;
3956
3957 case DP_TRAIN_VOLTAGE_SWING_LEVEL_1 | DP_TRAIN_PRE_EMPH_LEVEL_0:
3958 return EDP_LINK_TRAIN_600MV_0DB_IVB;
3959 case DP_TRAIN_VOLTAGE_SWING_LEVEL_1 | DP_TRAIN_PRE_EMPH_LEVEL_1:
3960 return EDP_LINK_TRAIN_600MV_3_5DB_IVB;
3961
3962 case DP_TRAIN_VOLTAGE_SWING_LEVEL_2 | DP_TRAIN_PRE_EMPH_LEVEL_0:
3963 return EDP_LINK_TRAIN_800MV_0DB_IVB;
3964 case DP_TRAIN_VOLTAGE_SWING_LEVEL_2 | DP_TRAIN_PRE_EMPH_LEVEL_1:
3965 return EDP_LINK_TRAIN_800MV_3_5DB_IVB;
3966
3967 default:
3968 DRM_DEBUG_KMS("Unsupported voltage swing/pre-emphasis level:"
3969 "0x%x\n", signal_levels);
3970 return EDP_LINK_TRAIN_500MV_0DB_IVB;
3971 }
3972}
3973
3974void
3975intel_dp_set_signal_levels(struct intel_dp *intel_dp)
3976{
3977 struct drm_i915_private *dev_priv = dp_to_i915(intel_dp);
3978 struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp);
3979 enum port port = intel_dig_port->base.port;
3980 u32 signal_levels, mask = 0;
3981 u8 train_set = intel_dp->train_set[0];
3982
3983 if (IS_GEN9_LP(dev_priv) || INTEL_GEN(dev_priv) >= 10) {
3984 signal_levels = bxt_signal_levels(intel_dp);
3985 } else if (HAS_DDI(dev_priv)) {
3986 signal_levels = ddi_signal_levels(intel_dp);
3987 mask = DDI_BUF_EMP_MASK;
3988 } else if (IS_CHERRYVIEW(dev_priv)) {
3989 signal_levels = chv_signal_levels(intel_dp);
3990 } else if (IS_VALLEYVIEW(dev_priv)) {
3991 signal_levels = vlv_signal_levels(intel_dp);
3992 } else if (IS_IVYBRIDGE(dev_priv) && port == PORT_A) {
3993 signal_levels = ivb_cpu_edp_signal_levels(train_set);
3994 mask = EDP_LINK_TRAIN_VOL_EMP_MASK_IVB;
3995 } else if (IS_GEN(dev_priv, 6) && port == PORT_A) {
3996 signal_levels = snb_cpu_edp_signal_levels(train_set);
3997 mask = EDP_LINK_TRAIN_VOL_EMP_MASK_SNB;
3998 } else {
3999 signal_levels = g4x_signal_levels(train_set);
4000 mask = DP_VOLTAGE_MASK | DP_PRE_EMPHASIS_MASK;
4001 }
4002
4003 if (mask)
4004 DRM_DEBUG_KMS("Using signal levels %08x\n", signal_levels);
4005
4006 DRM_DEBUG_KMS("Using vswing level %d\n",
4007 train_set & DP_TRAIN_VOLTAGE_SWING_MASK);
4008 DRM_DEBUG_KMS("Using pre-emphasis level %d\n",
4009 (train_set & DP_TRAIN_PRE_EMPHASIS_MASK) >>
4010 DP_TRAIN_PRE_EMPHASIS_SHIFT);
4011
4012 intel_dp->DP = (intel_dp->DP & ~mask) | signal_levels;
4013
4014 I915_WRITE(intel_dp->output_reg, intel_dp->DP);
4015 POSTING_READ(intel_dp->output_reg);
4016}
4017
4018void
4019intel_dp_program_link_training_pattern(struct intel_dp *intel_dp,
4020 u8 dp_train_pat)
4021{
4022 struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp);
4023 struct drm_i915_private *dev_priv =
4024 to_i915(intel_dig_port->base.base.dev);
4025
4026 _intel_dp_set_link_train(intel_dp, &intel_dp->DP, dp_train_pat);
4027
4028 I915_WRITE(intel_dp->output_reg, intel_dp->DP);
4029 POSTING_READ(intel_dp->output_reg);
4030}
4031
4032void intel_dp_set_idle_link_train(struct intel_dp *intel_dp)
4033{
4034 struct drm_i915_private *dev_priv = dp_to_i915(intel_dp);
4035 struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp);
4036 enum port port = intel_dig_port->base.port;
4037 u32 val;
4038
4039 if (!HAS_DDI(dev_priv))
4040 return;
4041
4042 val = I915_READ(DP_TP_CTL(port));
4043 val &= ~DP_TP_CTL_LINK_TRAIN_MASK;
4044 val |= DP_TP_CTL_LINK_TRAIN_IDLE;
4045 I915_WRITE(DP_TP_CTL(port), val);
4046
4047 /*
4048 * On PORT_A we can have only eDP in SST mode. There the only reason
4049 * we need to set idle transmission mode is to work around a HW issue
4050 * where we enable the pipe while not in idle link-training mode.
4051 * In this case there is requirement to wait for a minimum number of
4052 * idle patterns to be sent.
4053 */
4054 if (port == PORT_A)
4055 return;
4056
4057 if (intel_de_wait_for_set(dev_priv, DP_TP_STATUS(port),
4058 DP_TP_STATUS_IDLE_DONE, 1))
4059 DRM_ERROR("Timed out waiting for DP idle patterns\n");
4060}
4061
4062static void
4063intel_dp_link_down(struct intel_encoder *encoder,
4064 const struct intel_crtc_state *old_crtc_state)
4065{
4066 struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
4067 struct intel_dp *intel_dp = enc_to_intel_dp(&encoder->base);
4068 struct intel_crtc *crtc = to_intel_crtc(old_crtc_state->base.crtc);
4069 enum port port = encoder->port;
4070 u32 DP = intel_dp->DP;
4071
4072 if (WARN_ON((I915_READ(intel_dp->output_reg) & DP_PORT_EN) == 0))
4073 return;
4074
4075 DRM_DEBUG_KMS("\n");
4076
4077 if ((IS_IVYBRIDGE(dev_priv) && port == PORT_A) ||
4078 (HAS_PCH_CPT(dev_priv) && port != PORT_A)) {
4079 DP &= ~DP_LINK_TRAIN_MASK_CPT;
4080 DP |= DP_LINK_TRAIN_PAT_IDLE_CPT;
4081 } else {
4082 DP &= ~DP_LINK_TRAIN_MASK;
4083 DP |= DP_LINK_TRAIN_PAT_IDLE;
4084 }
4085 I915_WRITE(intel_dp->output_reg, DP);
4086 POSTING_READ(intel_dp->output_reg);
4087
4088 DP &= ~(DP_PORT_EN | DP_AUDIO_OUTPUT_ENABLE);
4089 I915_WRITE(intel_dp->output_reg, DP);
4090 POSTING_READ(intel_dp->output_reg);
4091
4092 /*
4093 * HW workaround for IBX, we need to move the port
4094 * to transcoder A after disabling it to allow the
4095 * matching HDMI port to be enabled on transcoder A.
4096 */
4097 if (HAS_PCH_IBX(dev_priv) && crtc->pipe == PIPE_B && port != PORT_A) {
4098 /*
4099 * We get CPU/PCH FIFO underruns on the other pipe when
4100 * doing the workaround. Sweep them under the rug.
4101 */
4102 intel_set_cpu_fifo_underrun_reporting(dev_priv, PIPE_A, false);
4103 intel_set_pch_fifo_underrun_reporting(dev_priv, PIPE_A, false);
4104
4105 /* always enable with pattern 1 (as per spec) */
4106 DP &= ~(DP_PIPE_SEL_MASK | DP_LINK_TRAIN_MASK);
4107 DP |= DP_PORT_EN | DP_PIPE_SEL(PIPE_A) |
4108 DP_LINK_TRAIN_PAT_1;
4109 I915_WRITE(intel_dp->output_reg, DP);
4110 POSTING_READ(intel_dp->output_reg);
4111
4112 DP &= ~DP_PORT_EN;
4113 I915_WRITE(intel_dp->output_reg, DP);
4114 POSTING_READ(intel_dp->output_reg);
4115
4116 intel_wait_for_vblank_if_active(dev_priv, PIPE_A);
4117 intel_set_cpu_fifo_underrun_reporting(dev_priv, PIPE_A, true);
4118 intel_set_pch_fifo_underrun_reporting(dev_priv, PIPE_A, true);
4119 }
4120
4121 msleep(intel_dp->panel_power_down_delay);
4122
4123 intel_dp->DP = DP;
4124
4125 if (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv)) {
4126 intel_wakeref_t wakeref;
4127
4128 with_pps_lock(intel_dp, wakeref)
4129 intel_dp->active_pipe = INVALID_PIPE;
4130 }
4131}
4132
4133static void
4134intel_dp_extended_receiver_capabilities(struct intel_dp *intel_dp)
4135{
4136 u8 dpcd_ext[6];
4137
4138 /*
4139 * Prior to DP1.3 the bit represented by
4140 * DP_EXTENDED_RECEIVER_CAP_FIELD_PRESENT was reserved.
4141 * if it is set DP_DPCD_REV at 0000h could be at a value less than
4142 * the true capability of the panel. The only way to check is to
4143 * then compare 0000h and 2200h.
4144 */
4145 if (!(intel_dp->dpcd[DP_TRAINING_AUX_RD_INTERVAL] &
4146 DP_EXTENDED_RECEIVER_CAP_FIELD_PRESENT))
4147 return;
4148
4149 if (drm_dp_dpcd_read(&intel_dp->aux, DP_DP13_DPCD_REV,
4150 &dpcd_ext, sizeof(dpcd_ext)) != sizeof(dpcd_ext)) {
4151 DRM_ERROR("DPCD failed read at extended capabilities\n");
4152 return;
4153 }
4154
4155 if (intel_dp->dpcd[DP_DPCD_REV] > dpcd_ext[DP_DPCD_REV]) {
4156 DRM_DEBUG_KMS("DPCD extended DPCD rev less than base DPCD rev\n");
4157 return;
4158 }
4159
4160 if (!memcmp(intel_dp->dpcd, dpcd_ext, sizeof(dpcd_ext)))
4161 return;
4162
4163 DRM_DEBUG_KMS("Base DPCD: %*ph\n",
4164 (int)sizeof(intel_dp->dpcd), intel_dp->dpcd);
4165
4166 memcpy(intel_dp->dpcd, dpcd_ext, sizeof(dpcd_ext));
4167}
4168
4169bool
4170intel_dp_read_dpcd(struct intel_dp *intel_dp)
4171{
4172 if (drm_dp_dpcd_read(&intel_dp->aux, 0x000, intel_dp->dpcd,
4173 sizeof(intel_dp->dpcd)) < 0)
4174 return false; /* aux transfer failed */
4175
4176 intel_dp_extended_receiver_capabilities(intel_dp);
4177
4178 DRM_DEBUG_KMS("DPCD: %*ph\n", (int) sizeof(intel_dp->dpcd), intel_dp->dpcd);
4179
4180 return intel_dp->dpcd[DP_DPCD_REV] != 0;
4181}
4182
4183bool intel_dp_get_colorimetry_status(struct intel_dp *intel_dp)
4184{
4185 u8 dprx = 0;
4186
4187 if (drm_dp_dpcd_readb(&intel_dp->aux, DP_DPRX_FEATURE_ENUMERATION_LIST,
4188 &dprx) != 1)
4189 return false;
4190 return dprx & DP_VSC_SDP_EXT_FOR_COLORIMETRY_SUPPORTED;
4191}
4192
4193static void intel_dp_get_dsc_sink_cap(struct intel_dp *intel_dp)
4194{
4195 /*
4196 * Clear the cached register set to avoid using stale values
4197 * for the sinks that do not support DSC.
4198 */
4199 memset(intel_dp->dsc_dpcd, 0, sizeof(intel_dp->dsc_dpcd));
4200
4201 /* Clear fec_capable to avoid using stale values */
4202 intel_dp->fec_capable = 0;
4203
4204 /* Cache the DSC DPCD if eDP or DP rev >= 1.4 */
4205 if (intel_dp->dpcd[DP_DPCD_REV] >= 0x14 ||
4206 intel_dp->edp_dpcd[0] >= DP_EDP_14) {
4207 if (drm_dp_dpcd_read(&intel_dp->aux, DP_DSC_SUPPORT,
4208 intel_dp->dsc_dpcd,
4209 sizeof(intel_dp->dsc_dpcd)) < 0)
4210 DRM_ERROR("Failed to read DPCD register 0x%x\n",
4211 DP_DSC_SUPPORT);
4212
4213 DRM_DEBUG_KMS("DSC DPCD: %*ph\n",
4214 (int)sizeof(intel_dp->dsc_dpcd),
4215 intel_dp->dsc_dpcd);
4216
4217 /* FEC is supported only on DP 1.4 */
4218 if (!intel_dp_is_edp(intel_dp) &&
4219 drm_dp_dpcd_readb(&intel_dp->aux, DP_FEC_CAPABILITY,
4220 &intel_dp->fec_capable) < 0)
4221 DRM_ERROR("Failed to read FEC DPCD register\n");
4222
4223 DRM_DEBUG_KMS("FEC CAPABILITY: %x\n", intel_dp->fec_capable);
4224 }
4225}
4226
4227static bool
4228intel_edp_init_dpcd(struct intel_dp *intel_dp)
4229{
4230 struct drm_i915_private *dev_priv =
4231 to_i915(dp_to_dig_port(intel_dp)->base.base.dev);
4232
4233 /* this function is meant to be called only once */
4234 WARN_ON(intel_dp->dpcd[DP_DPCD_REV] != 0);
4235
4236 if (!intel_dp_read_dpcd(intel_dp))
4237 return false;
4238
4239 drm_dp_read_desc(&intel_dp->aux, &intel_dp->desc,
4240 drm_dp_is_branch(intel_dp->dpcd));
4241
4242 /*
4243 * Read the eDP display control registers.
4244 *
4245 * Do this independent of DP_DPCD_DISPLAY_CONTROL_CAPABLE bit in
4246 * DP_EDP_CONFIGURATION_CAP, because some buggy displays do not have it
4247 * set, but require eDP 1.4+ detection (e.g. for supported link rates
4248 * method). The display control registers should read zero if they're
4249 * not supported anyway.
4250 */
4251 if (drm_dp_dpcd_read(&intel_dp->aux, DP_EDP_DPCD_REV,
4252 intel_dp->edp_dpcd, sizeof(intel_dp->edp_dpcd)) ==
4253 sizeof(intel_dp->edp_dpcd))
4254 DRM_DEBUG_KMS("eDP DPCD: %*ph\n", (int) sizeof(intel_dp->edp_dpcd),
4255 intel_dp->edp_dpcd);
4256
4257 /*
4258 * This has to be called after intel_dp->edp_dpcd is filled, PSR checks
4259 * for SET_POWER_CAPABLE bit in intel_dp->edp_dpcd[1]
4260 */
4261 intel_psr_init_dpcd(intel_dp);
4262
4263 /* Read the eDP 1.4+ supported link rates. */
4264 if (intel_dp->edp_dpcd[0] >= DP_EDP_14) {
4265 __le16 sink_rates[DP_MAX_SUPPORTED_RATES];
4266 int i;
4267
4268 drm_dp_dpcd_read(&intel_dp->aux, DP_SUPPORTED_LINK_RATES,
4269 sink_rates, sizeof(sink_rates));
4270
4271 for (i = 0; i < ARRAY_SIZE(sink_rates); i++) {
4272 int val = le16_to_cpu(sink_rates[i]);
4273
4274 if (val == 0)
4275 break;
4276
4277 /* Value read multiplied by 200kHz gives the per-lane
4278 * link rate in kHz. The source rates are, however,
4279 * stored in terms of LS_Clk kHz. The full conversion
4280 * back to symbols is
4281 * (val * 200kHz)*(8/10 ch. encoding)*(1/8 bit to Byte)
4282 */
4283 intel_dp->sink_rates[i] = (val * 200) / 10;
4284 }
4285 intel_dp->num_sink_rates = i;
4286 }
4287
4288 /*
4289 * Use DP_LINK_RATE_SET if DP_SUPPORTED_LINK_RATES are available,
4290 * default to DP_MAX_LINK_RATE and DP_LINK_BW_SET otherwise.
4291 */
4292 if (intel_dp->num_sink_rates)
4293 intel_dp->use_rate_select = true;
4294 else
4295 intel_dp_set_sink_rates(intel_dp);
4296
4297 intel_dp_set_common_rates(intel_dp);
4298
4299 /* Read the eDP DSC DPCD registers */
4300 if (INTEL_GEN(dev_priv) >= 10 || IS_GEMINILAKE(dev_priv))
4301 intel_dp_get_dsc_sink_cap(intel_dp);
4302
4303 return true;
4304}
4305
4306
4307static bool
4308intel_dp_get_dpcd(struct intel_dp *intel_dp)
4309{
4310 if (!intel_dp_read_dpcd(intel_dp))
4311 return false;
4312
4313 /*
4314 * Don't clobber cached eDP rates. Also skip re-reading
4315 * the OUI/ID since we know it won't change.
4316 */
4317 if (!intel_dp_is_edp(intel_dp)) {
4318 drm_dp_read_desc(&intel_dp->aux, &intel_dp->desc,
4319 drm_dp_is_branch(intel_dp->dpcd));
4320
4321 intel_dp_set_sink_rates(intel_dp);
4322 intel_dp_set_common_rates(intel_dp);
4323 }
4324
4325 /*
4326 * Some eDP panels do not set a valid value for sink count, that is why
4327 * it don't care about read it here and in intel_edp_init_dpcd().
4328 */
4329 if (!intel_dp_is_edp(intel_dp) &&
4330 !drm_dp_has_quirk(&intel_dp->desc, DP_DPCD_QUIRK_NO_SINK_COUNT)) {
4331 u8 count;
4332 ssize_t r;
4333
4334 r = drm_dp_dpcd_readb(&intel_dp->aux, DP_SINK_COUNT, &count);
4335 if (r < 1)
4336 return false;
4337
4338 /*
4339 * Sink count can change between short pulse hpd hence
4340 * a member variable in intel_dp will track any changes
4341 * between short pulse interrupts.
4342 */
4343 intel_dp->sink_count = DP_GET_SINK_COUNT(count);
4344
4345 /*
4346 * SINK_COUNT == 0 and DOWNSTREAM_PORT_PRESENT == 1 implies that
4347 * a dongle is present but no display. Unless we require to know
4348 * if a dongle is present or not, we don't need to update
4349 * downstream port information. So, an early return here saves
4350 * time from performing other operations which are not required.
4351 */
4352 if (!intel_dp->sink_count)
4353 return false;
4354 }
4355
4356 if (!drm_dp_is_branch(intel_dp->dpcd))
4357 return true; /* native DP sink */
4358
4359 if (intel_dp->dpcd[DP_DPCD_REV] == 0x10)
4360 return true; /* no per-port downstream info */
4361
4362 if (drm_dp_dpcd_read(&intel_dp->aux, DP_DOWNSTREAM_PORT_0,
4363 intel_dp->downstream_ports,
4364 DP_MAX_DOWNSTREAM_PORTS) < 0)
4365 return false; /* downstream port status fetch failed */
4366
4367 return true;
4368}
4369
4370static bool
4371intel_dp_sink_can_mst(struct intel_dp *intel_dp)
4372{
4373 u8 mstm_cap;
4374
4375 if (intel_dp->dpcd[DP_DPCD_REV] < 0x12)
4376 return false;
4377
4378 if (drm_dp_dpcd_readb(&intel_dp->aux, DP_MSTM_CAP, &mstm_cap) != 1)
4379 return false;
4380
4381 return mstm_cap & DP_MST_CAP;
4382}
4383
4384static bool
4385intel_dp_can_mst(struct intel_dp *intel_dp)
4386{
4387 return i915_modparams.enable_dp_mst &&
4388 intel_dp->can_mst &&
4389 intel_dp_sink_can_mst(intel_dp);
4390}
4391
4392static void
4393intel_dp_configure_mst(struct intel_dp *intel_dp)
4394{
4395 struct intel_encoder *encoder =
4396 &dp_to_dig_port(intel_dp)->base;
4397 bool sink_can_mst = intel_dp_sink_can_mst(intel_dp);
4398
4399 DRM_DEBUG_KMS("MST support? port %c: %s, sink: %s, modparam: %s\n",
4400 port_name(encoder->port), yesno(intel_dp->can_mst),
4401 yesno(sink_can_mst), yesno(i915_modparams.enable_dp_mst));
4402
4403 if (!intel_dp->can_mst)
4404 return;
4405
4406 intel_dp->is_mst = sink_can_mst &&
4407 i915_modparams.enable_dp_mst;
4408
4409 drm_dp_mst_topology_mgr_set_mst(&intel_dp->mst_mgr,
4410 intel_dp->is_mst);
4411}
4412
4413static bool
4414intel_dp_get_sink_irq_esi(struct intel_dp *intel_dp, u8 *sink_irq_vector)
4415{
4416 return drm_dp_dpcd_read(&intel_dp->aux, DP_SINK_COUNT_ESI,
4417 sink_irq_vector, DP_DPRX_ESI_LEN) ==
4418 DP_DPRX_ESI_LEN;
4419}
4420
4421static void
4422intel_pixel_encoding_setup_vsc(struct intel_dp *intel_dp,
4423 const struct intel_crtc_state *crtc_state)
4424{
4425 struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp);
4426 struct dp_sdp vsc_sdp = {};
4427
4428 /* Prepare VSC Header for SU as per DP 1.4a spec, Table 2-119 */
4429 vsc_sdp.sdp_header.HB0 = 0;
4430 vsc_sdp.sdp_header.HB1 = 0x7;
4431
4432 /*
4433 * VSC SDP supporting 3D stereo, PSR2, and Pixel Encoding/
4434 * Colorimetry Format indication.
4435 */
4436 vsc_sdp.sdp_header.HB2 = 0x5;
4437
4438 /*
4439 * VSC SDP supporting 3D stereo, + PSR2, + Pixel Encoding/
4440 * Colorimetry Format indication (HB2 = 05h).
4441 */
4442 vsc_sdp.sdp_header.HB3 = 0x13;
4443
4444 /*
4445 * YCbCr 420 = 3h DB16[7:4] ITU-R BT.601 = 0h, ITU-R BT.709 = 1h
4446 * DB16[3:0] DP 1.4a spec, Table 2-120
4447 */
4448 vsc_sdp.db[16] = 0x3 << 4; /* 0x3 << 4 , YCbCr 420*/
4449 /* RGB->YCBCR color conversion uses the BT.709 color space. */
4450 vsc_sdp.db[16] |= 0x1; /* 0x1, ITU-R BT.709 */
4451
4452 /*
4453 * For pixel encoding formats YCbCr444, YCbCr422, YCbCr420, and Y Only,
4454 * the following Component Bit Depth values are defined:
4455 * 001b = 8bpc.
4456 * 010b = 10bpc.
4457 * 011b = 12bpc.
4458 * 100b = 16bpc.
4459 */
4460 switch (crtc_state->pipe_bpp) {
4461 case 24: /* 8bpc */
4462 vsc_sdp.db[17] = 0x1;
4463 break;
4464 case 30: /* 10bpc */
4465 vsc_sdp.db[17] = 0x2;
4466 break;
4467 case 36: /* 12bpc */
4468 vsc_sdp.db[17] = 0x3;
4469 break;
4470 case 48: /* 16bpc */
4471 vsc_sdp.db[17] = 0x4;
4472 break;
4473 default:
4474 MISSING_CASE(crtc_state->pipe_bpp);
4475 break;
4476 }
4477
4478 /*
4479 * Dynamic Range (Bit 7)
4480 * 0 = VESA range, 1 = CTA range.
4481 * all YCbCr are always limited range
4482 */
4483 vsc_sdp.db[17] |= 0x80;
4484
4485 /*
4486 * Content Type (Bits 2:0)
4487 * 000b = Not defined.
4488 * 001b = Graphics.
4489 * 010b = Photo.
4490 * 011b = Video.
4491 * 100b = Game
4492 * All other values are RESERVED.
4493 * Note: See CTA-861-G for the definition and expected
4494 * processing by a stream sink for the above contect types.
4495 */
4496 vsc_sdp.db[18] = 0;
4497
4498 intel_dig_port->write_infoframe(&intel_dig_port->base,
4499 crtc_state, DP_SDP_VSC, &vsc_sdp, sizeof(vsc_sdp));
4500}
4501
4502void intel_dp_ycbcr_420_enable(struct intel_dp *intel_dp,
4503 const struct intel_crtc_state *crtc_state)
4504{
4505 if (crtc_state->output_format != INTEL_OUTPUT_FORMAT_YCBCR420)
4506 return;
4507
4508 intel_pixel_encoding_setup_vsc(intel_dp, crtc_state);
4509}
4510
4511static u8 intel_dp_autotest_link_training(struct intel_dp *intel_dp)
4512{
4513 int status = 0;
4514 int test_link_rate;
4515 u8 test_lane_count, test_link_bw;
4516 /* (DP CTS 1.2)
4517 * 4.3.1.11
4518 */
4519 /* Read the TEST_LANE_COUNT and TEST_LINK_RTAE fields (DP CTS 3.1.4) */
4520 status = drm_dp_dpcd_readb(&intel_dp->aux, DP_TEST_LANE_COUNT,
4521 &test_lane_count);
4522
4523 if (status <= 0) {
4524 DRM_DEBUG_KMS("Lane count read failed\n");
4525 return DP_TEST_NAK;
4526 }
4527 test_lane_count &= DP_MAX_LANE_COUNT_MASK;
4528
4529 status = drm_dp_dpcd_readb(&intel_dp->aux, DP_TEST_LINK_RATE,
4530 &test_link_bw);
4531 if (status <= 0) {
4532 DRM_DEBUG_KMS("Link Rate read failed\n");
4533 return DP_TEST_NAK;
4534 }
4535 test_link_rate = drm_dp_bw_code_to_link_rate(test_link_bw);
4536
4537 /* Validate the requested link rate and lane count */
4538 if (!intel_dp_link_params_valid(intel_dp, test_link_rate,
4539 test_lane_count))
4540 return DP_TEST_NAK;
4541
4542 intel_dp->compliance.test_lane_count = test_lane_count;
4543 intel_dp->compliance.test_link_rate = test_link_rate;
4544
4545 return DP_TEST_ACK;
4546}
4547
4548static u8 intel_dp_autotest_video_pattern(struct intel_dp *intel_dp)
4549{
4550 u8 test_pattern;
4551 u8 test_misc;
4552 __be16 h_width, v_height;
4553 int status = 0;
4554
4555 /* Read the TEST_PATTERN (DP CTS 3.1.5) */
4556 status = drm_dp_dpcd_readb(&intel_dp->aux, DP_TEST_PATTERN,
4557 &test_pattern);
4558 if (status <= 0) {
4559 DRM_DEBUG_KMS("Test pattern read failed\n");
4560 return DP_TEST_NAK;
4561 }
4562 if (test_pattern != DP_COLOR_RAMP)
4563 return DP_TEST_NAK;
4564
4565 status = drm_dp_dpcd_read(&intel_dp->aux, DP_TEST_H_WIDTH_HI,
4566 &h_width, 2);
4567 if (status <= 0) {
4568 DRM_DEBUG_KMS("H Width read failed\n");
4569 return DP_TEST_NAK;
4570 }
4571
4572 status = drm_dp_dpcd_read(&intel_dp->aux, DP_TEST_V_HEIGHT_HI,
4573 &v_height, 2);
4574 if (status <= 0) {
4575 DRM_DEBUG_KMS("V Height read failed\n");
4576 return DP_TEST_NAK;
4577 }
4578
4579 status = drm_dp_dpcd_readb(&intel_dp->aux, DP_TEST_MISC0,
4580 &test_misc);
4581 if (status <= 0) {
4582 DRM_DEBUG_KMS("TEST MISC read failed\n");
4583 return DP_TEST_NAK;
4584 }
4585 if ((test_misc & DP_TEST_COLOR_FORMAT_MASK) != DP_COLOR_FORMAT_RGB)
4586 return DP_TEST_NAK;
4587 if (test_misc & DP_TEST_DYNAMIC_RANGE_CEA)
4588 return DP_TEST_NAK;
4589 switch (test_misc & DP_TEST_BIT_DEPTH_MASK) {
4590 case DP_TEST_BIT_DEPTH_6:
4591 intel_dp->compliance.test_data.bpc = 6;
4592 break;
4593 case DP_TEST_BIT_DEPTH_8:
4594 intel_dp->compliance.test_data.bpc = 8;
4595 break;
4596 default:
4597 return DP_TEST_NAK;
4598 }
4599
4600 intel_dp->compliance.test_data.video_pattern = test_pattern;
4601 intel_dp->compliance.test_data.hdisplay = be16_to_cpu(h_width);
4602 intel_dp->compliance.test_data.vdisplay = be16_to_cpu(v_height);
4603 /* Set test active flag here so userspace doesn't interrupt things */
4604 intel_dp->compliance.test_active = 1;
4605
4606 return DP_TEST_ACK;
4607}
4608
4609static u8 intel_dp_autotest_edid(struct intel_dp *intel_dp)
4610{
4611 u8 test_result = DP_TEST_ACK;
4612 struct intel_connector *intel_connector = intel_dp->attached_connector;
4613 struct drm_connector *connector = &intel_connector->base;
4614
4615 if (intel_connector->detect_edid == NULL ||
4616 connector->edid_corrupt ||
4617 intel_dp->aux.i2c_defer_count > 6) {
4618 /* Check EDID read for NACKs, DEFERs and corruption
4619 * (DP CTS 1.2 Core r1.1)
4620 * 4.2.2.4 : Failed EDID read, I2C_NAK
4621 * 4.2.2.5 : Failed EDID read, I2C_DEFER
4622 * 4.2.2.6 : EDID corruption detected
4623 * Use failsafe mode for all cases
4624 */
4625 if (intel_dp->aux.i2c_nack_count > 0 ||
4626 intel_dp->aux.i2c_defer_count > 0)
4627 DRM_DEBUG_KMS("EDID read had %d NACKs, %d DEFERs\n",
4628 intel_dp->aux.i2c_nack_count,
4629 intel_dp->aux.i2c_defer_count);
4630 intel_dp->compliance.test_data.edid = INTEL_DP_RESOLUTION_FAILSAFE;
4631 } else {
4632 struct edid *block = intel_connector->detect_edid;
4633
4634 /* We have to write the checksum
4635 * of the last block read
4636 */
4637 block += intel_connector->detect_edid->extensions;
4638
4639 if (drm_dp_dpcd_writeb(&intel_dp->aux, DP_TEST_EDID_CHECKSUM,
4640 block->checksum) <= 0)
4641 DRM_DEBUG_KMS("Failed to write EDID checksum\n");
4642
4643 test_result = DP_TEST_ACK | DP_TEST_EDID_CHECKSUM_WRITE;
4644 intel_dp->compliance.test_data.edid = INTEL_DP_RESOLUTION_PREFERRED;
4645 }
4646
4647 /* Set test active flag here so userspace doesn't interrupt things */
4648 intel_dp->compliance.test_active = 1;
4649
4650 return test_result;
4651}
4652
4653static u8 intel_dp_autotest_phy_pattern(struct intel_dp *intel_dp)
4654{
4655 u8 test_result = DP_TEST_NAK;
4656 return test_result;
4657}
4658
4659static void intel_dp_handle_test_request(struct intel_dp *intel_dp)
4660{
4661 u8 response = DP_TEST_NAK;
4662 u8 request = 0;
4663 int status;
4664
4665 status = drm_dp_dpcd_readb(&intel_dp->aux, DP_TEST_REQUEST, &request);
4666 if (status <= 0) {
4667 DRM_DEBUG_KMS("Could not read test request from sink\n");
4668 goto update_status;
4669 }
4670
4671 switch (request) {
4672 case DP_TEST_LINK_TRAINING:
4673 DRM_DEBUG_KMS("LINK_TRAINING test requested\n");
4674 response = intel_dp_autotest_link_training(intel_dp);
4675 break;
4676 case DP_TEST_LINK_VIDEO_PATTERN:
4677 DRM_DEBUG_KMS("TEST_PATTERN test requested\n");
4678 response = intel_dp_autotest_video_pattern(intel_dp);
4679 break;
4680 case DP_TEST_LINK_EDID_READ:
4681 DRM_DEBUG_KMS("EDID test requested\n");
4682 response = intel_dp_autotest_edid(intel_dp);
4683 break;
4684 case DP_TEST_LINK_PHY_TEST_PATTERN:
4685 DRM_DEBUG_KMS("PHY_PATTERN test requested\n");
4686 response = intel_dp_autotest_phy_pattern(intel_dp);
4687 break;
4688 default:
4689 DRM_DEBUG_KMS("Invalid test request '%02x'\n", request);
4690 break;
4691 }
4692
4693 if (response & DP_TEST_ACK)
4694 intel_dp->compliance.test_type = request;
4695
4696update_status:
4697 status = drm_dp_dpcd_writeb(&intel_dp->aux, DP_TEST_RESPONSE, response);
4698 if (status <= 0)
4699 DRM_DEBUG_KMS("Could not write test response to sink\n");
4700}
4701
4702static int
4703intel_dp_check_mst_status(struct intel_dp *intel_dp)
4704{
4705 bool bret;
4706
4707 if (intel_dp->is_mst) {
4708 u8 esi[DP_DPRX_ESI_LEN] = { 0 };
4709 int ret = 0;
4710 int retry;
4711 bool handled;
4712
4713 WARN_ON_ONCE(intel_dp->active_mst_links < 0);
4714 bret = intel_dp_get_sink_irq_esi(intel_dp, esi);
4715go_again:
4716 if (bret == true) {
4717
4718 /* check link status - esi[10] = 0x200c */
4719 if (intel_dp->active_mst_links > 0 &&
4720 !drm_dp_channel_eq_ok(&esi[10], intel_dp->lane_count)) {
4721 DRM_DEBUG_KMS("channel EQ not ok, retraining\n");
4722 intel_dp_start_link_train(intel_dp);
4723 intel_dp_stop_link_train(intel_dp);
4724 }
4725
4726 DRM_DEBUG_KMS("got esi %3ph\n", esi);
4727 ret = drm_dp_mst_hpd_irq(&intel_dp->mst_mgr, esi, &handled);
4728
4729 if (handled) {
4730 for (retry = 0; retry < 3; retry++) {
4731 int wret;
4732 wret = drm_dp_dpcd_write(&intel_dp->aux,
4733 DP_SINK_COUNT_ESI+1,
4734 &esi[1], 3);
4735 if (wret == 3) {
4736 break;
4737 }
4738 }
4739
4740 bret = intel_dp_get_sink_irq_esi(intel_dp, esi);
4741 if (bret == true) {
4742 DRM_DEBUG_KMS("got esi2 %3ph\n", esi);
4743 goto go_again;
4744 }
4745 } else
4746 ret = 0;
4747
4748 return ret;
4749 } else {
4750 DRM_DEBUG_KMS("failed to get ESI - device may have failed\n");
4751 intel_dp->is_mst = false;
4752 drm_dp_mst_topology_mgr_set_mst(&intel_dp->mst_mgr,
4753 intel_dp->is_mst);
4754 }
4755 }
4756 return -EINVAL;
4757}
4758
4759static bool
4760intel_dp_needs_link_retrain(struct intel_dp *intel_dp)
4761{
4762 u8 link_status[DP_LINK_STATUS_SIZE];
4763
4764 if (!intel_dp->link_trained)
4765 return false;
4766
4767 /*
4768 * While PSR source HW is enabled, it will control main-link sending
4769 * frames, enabling and disabling it so trying to do a retrain will fail
4770 * as the link would or not be on or it could mix training patterns
4771 * and frame data at the same time causing retrain to fail.
4772 * Also when exiting PSR, HW will retrain the link anyways fixing
4773 * any link status error.
4774 */
4775 if (intel_psr_enabled(intel_dp))
4776 return false;
4777
4778 if (!intel_dp_get_link_status(intel_dp, link_status))
4779 return false;
4780
4781 /*
4782 * Validate the cached values of intel_dp->link_rate and
4783 * intel_dp->lane_count before attempting to retrain.
4784 */
4785 if (!intel_dp_link_params_valid(intel_dp, intel_dp->link_rate,
4786 intel_dp->lane_count))
4787 return false;
4788
4789 /* Retrain if Channel EQ or CR not ok */
4790 return !drm_dp_channel_eq_ok(link_status, intel_dp->lane_count);
4791}
4792
4793int intel_dp_retrain_link(struct intel_encoder *encoder,
4794 struct drm_modeset_acquire_ctx *ctx)
4795{
4796 struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
4797 struct intel_dp *intel_dp = enc_to_intel_dp(&encoder->base);
4798 struct intel_connector *connector = intel_dp->attached_connector;
4799 struct drm_connector_state *conn_state;
4800 struct intel_crtc_state *crtc_state;
4801 struct intel_crtc *crtc;
4802 int ret;
4803
4804 /* FIXME handle the MST connectors as well */
4805
4806 if (!connector || connector->base.status != connector_status_connected)
4807 return 0;
4808
4809 ret = drm_modeset_lock(&dev_priv->drm.mode_config.connection_mutex,
4810 ctx);
4811 if (ret)
4812 return ret;
4813
4814 conn_state = connector->base.state;
4815
4816 crtc = to_intel_crtc(conn_state->crtc);
4817 if (!crtc)
4818 return 0;
4819
4820 ret = drm_modeset_lock(&crtc->base.mutex, ctx);
4821 if (ret)
4822 return ret;
4823
4824 crtc_state = to_intel_crtc_state(crtc->base.state);
4825
4826 WARN_ON(!intel_crtc_has_dp_encoder(crtc_state));
4827
4828 if (!crtc_state->base.active)
4829 return 0;
4830
4831 if (conn_state->commit &&
4832 !try_wait_for_completion(&conn_state->commit->hw_done))
4833 return 0;
4834
4835 if (!intel_dp_needs_link_retrain(intel_dp))
4836 return 0;
4837
4838 /* Suppress underruns caused by re-training */
4839 intel_set_cpu_fifo_underrun_reporting(dev_priv, crtc->pipe, false);
4840 if (crtc_state->has_pch_encoder)
4841 intel_set_pch_fifo_underrun_reporting(dev_priv,
4842 intel_crtc_pch_transcoder(crtc), false);
4843
4844 intel_dp_start_link_train(intel_dp);
4845 intel_dp_stop_link_train(intel_dp);
4846
4847 /* Keep underrun reporting disabled until things are stable */
4848 intel_wait_for_vblank(dev_priv, crtc->pipe);
4849
4850 intel_set_cpu_fifo_underrun_reporting(dev_priv, crtc->pipe, true);
4851 if (crtc_state->has_pch_encoder)
4852 intel_set_pch_fifo_underrun_reporting(dev_priv,
4853 intel_crtc_pch_transcoder(crtc), true);
4854
4855 return 0;
4856}
4857
4858/*
4859 * If display is now connected check links status,
4860 * there has been known issues of link loss triggering
4861 * long pulse.
4862 *
4863 * Some sinks (eg. ASUS PB287Q) seem to perform some
4864 * weird HPD ping pong during modesets. So we can apparently
4865 * end up with HPD going low during a modeset, and then
4866 * going back up soon after. And once that happens we must
4867 * retrain the link to get a picture. That's in case no
4868 * userspace component reacted to intermittent HPD dip.
4869 */
4870static enum intel_hotplug_state
4871intel_dp_hotplug(struct intel_encoder *encoder,
4872 struct intel_connector *connector,
4873 bool irq_received)
4874{
4875 struct drm_modeset_acquire_ctx ctx;
4876 enum intel_hotplug_state state;
4877 int ret;
4878
4879 state = intel_encoder_hotplug(encoder, connector, irq_received);
4880
4881 drm_modeset_acquire_init(&ctx, 0);
4882
4883 for (;;) {
4884 ret = intel_dp_retrain_link(encoder, &ctx);
4885
4886 if (ret == -EDEADLK) {
4887 drm_modeset_backoff(&ctx);
4888 continue;
4889 }
4890
4891 break;
4892 }
4893
4894 drm_modeset_drop_locks(&ctx);
4895 drm_modeset_acquire_fini(&ctx);
4896 WARN(ret, "Acquiring modeset locks failed with %i\n", ret);
4897
4898 /*
4899 * Keeping it consistent with intel_ddi_hotplug() and
4900 * intel_hdmi_hotplug().
4901 */
4902 if (state == INTEL_HOTPLUG_UNCHANGED && irq_received)
4903 state = INTEL_HOTPLUG_RETRY;
4904
4905 return state;
4906}
4907
4908static void intel_dp_check_service_irq(struct intel_dp *intel_dp)
4909{
4910 u8 val;
4911
4912 if (intel_dp->dpcd[DP_DPCD_REV] < 0x11)
4913 return;
4914
4915 if (drm_dp_dpcd_readb(&intel_dp->aux,
4916 DP_DEVICE_SERVICE_IRQ_VECTOR, &val) != 1 || !val)
4917 return;
4918
4919 drm_dp_dpcd_writeb(&intel_dp->aux, DP_DEVICE_SERVICE_IRQ_VECTOR, val);
4920
4921 if (val & DP_AUTOMATED_TEST_REQUEST)
4922 intel_dp_handle_test_request(intel_dp);
4923
4924 if (val & DP_CP_IRQ)
4925 intel_hdcp_handle_cp_irq(intel_dp->attached_connector);
4926
4927 if (val & DP_SINK_SPECIFIC_IRQ)
4928 DRM_DEBUG_DRIVER("Sink specific irq unhandled\n");
4929}
4930
4931/*
4932 * According to DP spec
4933 * 5.1.2:
4934 * 1. Read DPCD
4935 * 2. Configure link according to Receiver Capabilities
4936 * 3. Use Link Training from 2.5.3.3 and 3.5.1.3
4937 * 4. Check link status on receipt of hot-plug interrupt
4938 *
4939 * intel_dp_short_pulse - handles short pulse interrupts
4940 * when full detection is not required.
4941 * Returns %true if short pulse is handled and full detection
4942 * is NOT required and %false otherwise.
4943 */
4944static bool
4945intel_dp_short_pulse(struct intel_dp *intel_dp)
4946{
4947 struct drm_i915_private *dev_priv = dp_to_i915(intel_dp);
4948 u8 old_sink_count = intel_dp->sink_count;
4949 bool ret;
4950
4951 /*
4952 * Clearing compliance test variables to allow capturing
4953 * of values for next automated test request.
4954 */
4955 memset(&intel_dp->compliance, 0, sizeof(intel_dp->compliance));
4956
4957 /*
4958 * Now read the DPCD to see if it's actually running
4959 * If the current value of sink count doesn't match with
4960 * the value that was stored earlier or dpcd read failed
4961 * we need to do full detection
4962 */
4963 ret = intel_dp_get_dpcd(intel_dp);
4964
4965 if ((old_sink_count != intel_dp->sink_count) || !ret) {
4966 /* No need to proceed if we are going to do full detect */
4967 return false;
4968 }
4969
4970 intel_dp_check_service_irq(intel_dp);
4971
4972 /* Handle CEC interrupts, if any */
4973 drm_dp_cec_irq(&intel_dp->aux);
4974
4975 /* defer to the hotplug work for link retraining if needed */
4976 if (intel_dp_needs_link_retrain(intel_dp))
4977 return false;
4978
4979 intel_psr_short_pulse(intel_dp);
4980
4981 if (intel_dp->compliance.test_type == DP_TEST_LINK_TRAINING) {
4982 DRM_DEBUG_KMS("Link Training Compliance Test requested\n");
4983 /* Send a Hotplug Uevent to userspace to start modeset */
4984 drm_kms_helper_hotplug_event(&dev_priv->drm);
4985 }
4986
4987 return true;
4988}
4989
4990/* XXX this is probably wrong for multiple downstream ports */
4991static enum drm_connector_status
4992intel_dp_detect_dpcd(struct intel_dp *intel_dp)
4993{
4994 struct intel_lspcon *lspcon = dp_to_lspcon(intel_dp);
4995 u8 *dpcd = intel_dp->dpcd;
4996 u8 type;
4997
4998 if (WARN_ON(intel_dp_is_edp(intel_dp)))
4999 return connector_status_connected;
5000
5001 if (lspcon->active)
5002 lspcon_resume(lspcon);
5003
5004 if (!intel_dp_get_dpcd(intel_dp))
5005 return connector_status_disconnected;
5006
5007 /* if there's no downstream port, we're done */
5008 if (!drm_dp_is_branch(dpcd))
5009 return connector_status_connected;
5010
5011 /* If we're HPD-aware, SINK_COUNT changes dynamically */
5012 if (intel_dp->dpcd[DP_DPCD_REV] >= 0x11 &&
5013 intel_dp->downstream_ports[0] & DP_DS_PORT_HPD) {
5014
5015 return intel_dp->sink_count ?
5016 connector_status_connected : connector_status_disconnected;
5017 }
5018
5019 if (intel_dp_can_mst(intel_dp))
5020 return connector_status_connected;
5021
5022 /* If no HPD, poke DDC gently */
5023 if (drm_probe_ddc(&intel_dp->aux.ddc))
5024 return connector_status_connected;
5025
5026 /* Well we tried, say unknown for unreliable port types */
5027 if (intel_dp->dpcd[DP_DPCD_REV] >= 0x11) {
5028 type = intel_dp->downstream_ports[0] & DP_DS_PORT_TYPE_MASK;
5029 if (type == DP_DS_PORT_TYPE_VGA ||
5030 type == DP_DS_PORT_TYPE_NON_EDID)
5031 return connector_status_unknown;
5032 } else {
5033 type = intel_dp->dpcd[DP_DOWNSTREAMPORT_PRESENT] &
5034 DP_DWN_STRM_PORT_TYPE_MASK;
5035 if (type == DP_DWN_STRM_PORT_TYPE_ANALOG ||
5036 type == DP_DWN_STRM_PORT_TYPE_OTHER)
5037 return connector_status_unknown;
5038 }
5039
5040 /* Anything else is out of spec, warn and ignore */
5041 DRM_DEBUG_KMS("Broken DP branch device, ignoring\n");
5042 return connector_status_disconnected;
5043}
5044
5045static enum drm_connector_status
5046edp_detect(struct intel_dp *intel_dp)
5047{
5048 return connector_status_connected;
5049}
5050
5051static bool ibx_digital_port_connected(struct intel_encoder *encoder)
5052{
5053 struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
5054 u32 bit;
5055
5056 switch (encoder->hpd_pin) {
5057 case HPD_PORT_B:
5058 bit = SDE_PORTB_HOTPLUG;
5059 break;
5060 case HPD_PORT_C:
5061 bit = SDE_PORTC_HOTPLUG;
5062 break;
5063 case HPD_PORT_D:
5064 bit = SDE_PORTD_HOTPLUG;
5065 break;
5066 default:
5067 MISSING_CASE(encoder->hpd_pin);
5068 return false;
5069 }
5070
5071 return I915_READ(SDEISR) & bit;
5072}
5073
5074static bool cpt_digital_port_connected(struct intel_encoder *encoder)
5075{
5076 struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
5077 u32 bit;
5078
5079 switch (encoder->hpd_pin) {
5080 case HPD_PORT_B:
5081 bit = SDE_PORTB_HOTPLUG_CPT;
5082 break;
5083 case HPD_PORT_C:
5084 bit = SDE_PORTC_HOTPLUG_CPT;
5085 break;
5086 case HPD_PORT_D:
5087 bit = SDE_PORTD_HOTPLUG_CPT;
5088 break;
5089 default:
5090 MISSING_CASE(encoder->hpd_pin);
5091 return false;
5092 }
5093
5094 return I915_READ(SDEISR) & bit;
5095}
5096
5097static bool spt_digital_port_connected(struct intel_encoder *encoder)
5098{
5099 struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
5100 u32 bit;
5101
5102 switch (encoder->hpd_pin) {
5103 case HPD_PORT_A:
5104 bit = SDE_PORTA_HOTPLUG_SPT;
5105 break;
5106 case HPD_PORT_E:
5107 bit = SDE_PORTE_HOTPLUG_SPT;
5108 break;
5109 default:
5110 return cpt_digital_port_connected(encoder);
5111 }
5112
5113 return I915_READ(SDEISR) & bit;
5114}
5115
5116static bool g4x_digital_port_connected(struct intel_encoder *encoder)
5117{
5118 struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
5119 u32 bit;
5120
5121 switch (encoder->hpd_pin) {
5122 case HPD_PORT_B:
5123 bit = PORTB_HOTPLUG_LIVE_STATUS_G4X;
5124 break;
5125 case HPD_PORT_C:
5126 bit = PORTC_HOTPLUG_LIVE_STATUS_G4X;
5127 break;
5128 case HPD_PORT_D:
5129 bit = PORTD_HOTPLUG_LIVE_STATUS_G4X;
5130 break;
5131 default:
5132 MISSING_CASE(encoder->hpd_pin);
5133 return false;
5134 }
5135
5136 return I915_READ(PORT_HOTPLUG_STAT) & bit;
5137}
5138
5139static bool gm45_digital_port_connected(struct intel_encoder *encoder)
5140{
5141 struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
5142 u32 bit;
5143
5144 switch (encoder->hpd_pin) {
5145 case HPD_PORT_B:
5146 bit = PORTB_HOTPLUG_LIVE_STATUS_GM45;
5147 break;
5148 case HPD_PORT_C:
5149 bit = PORTC_HOTPLUG_LIVE_STATUS_GM45;
5150 break;
5151 case HPD_PORT_D:
5152 bit = PORTD_HOTPLUG_LIVE_STATUS_GM45;
5153 break;
5154 default:
5155 MISSING_CASE(encoder->hpd_pin);
5156 return false;
5157 }
5158
5159 return I915_READ(PORT_HOTPLUG_STAT) & bit;
5160}
5161
5162static bool ilk_digital_port_connected(struct intel_encoder *encoder)
5163{
5164 struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
5165
5166 if (encoder->hpd_pin == HPD_PORT_A)
5167 return I915_READ(DEISR) & DE_DP_A_HOTPLUG;
5168 else
5169 return ibx_digital_port_connected(encoder);
5170}
5171
5172static bool snb_digital_port_connected(struct intel_encoder *encoder)
5173{
5174 struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
5175
5176 if (encoder->hpd_pin == HPD_PORT_A)
5177 return I915_READ(DEISR) & DE_DP_A_HOTPLUG;
5178 else
5179 return cpt_digital_port_connected(encoder);
5180}
5181
5182static bool ivb_digital_port_connected(struct intel_encoder *encoder)
5183{
5184 struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
5185
5186 if (encoder->hpd_pin == HPD_PORT_A)
5187 return I915_READ(DEISR) & DE_DP_A_HOTPLUG_IVB;
5188 else
5189 return cpt_digital_port_connected(encoder);
5190}
5191
5192static bool bdw_digital_port_connected(struct intel_encoder *encoder)
5193{
5194 struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
5195
5196 if (encoder->hpd_pin == HPD_PORT_A)
5197 return I915_READ(GEN8_DE_PORT_ISR) & GEN8_PORT_DP_A_HOTPLUG;
5198 else
5199 return cpt_digital_port_connected(encoder);
5200}
5201
5202static bool bxt_digital_port_connected(struct intel_encoder *encoder)
5203{
5204 struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
5205 u32 bit;
5206
5207 switch (encoder->hpd_pin) {
5208 case HPD_PORT_A:
5209 bit = BXT_DE_PORT_HP_DDIA;
5210 break;
5211 case HPD_PORT_B:
5212 bit = BXT_DE_PORT_HP_DDIB;
5213 break;
5214 case HPD_PORT_C:
5215 bit = BXT_DE_PORT_HP_DDIC;
5216 break;
5217 default:
5218 MISSING_CASE(encoder->hpd_pin);
5219 return false;
5220 }
5221
5222 return I915_READ(GEN8_DE_PORT_ISR) & bit;
5223}
5224
5225static bool icl_combo_port_connected(struct drm_i915_private *dev_priv,
5226 struct intel_digital_port *intel_dig_port)
5227{
5228 enum port port = intel_dig_port->base.port;
5229
5230 return I915_READ(SDEISR) & SDE_DDI_HOTPLUG_ICP(port);
5231}
5232
5233static bool icl_digital_port_connected(struct intel_encoder *encoder)
5234{
5235 struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
5236 struct intel_digital_port *dig_port = enc_to_dig_port(&encoder->base);
5237 enum phy phy = intel_port_to_phy(dev_priv, encoder->port);
5238
5239 if (intel_phy_is_combo(dev_priv, phy))
5240 return icl_combo_port_connected(dev_priv, dig_port);
5241 else if (intel_phy_is_tc(dev_priv, phy))
5242 return intel_tc_port_connected(dig_port);
5243 else
5244 MISSING_CASE(encoder->hpd_pin);
5245
5246 return false;
5247}
5248
5249/*
5250 * intel_digital_port_connected - is the specified port connected?
5251 * @encoder: intel_encoder
5252 *
5253 * In cases where there's a connector physically connected but it can't be used
5254 * by our hardware we also return false, since the rest of the driver should
5255 * pretty much treat the port as disconnected. This is relevant for type-C
5256 * (starting on ICL) where there's ownership involved.
5257 *
5258 * Return %true if port is connected, %false otherwise.
5259 */
5260static bool __intel_digital_port_connected(struct intel_encoder *encoder)
5261{
5262 struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
5263
5264 if (HAS_GMCH(dev_priv)) {
5265 if (IS_GM45(dev_priv))
5266 return gm45_digital_port_connected(encoder);
5267 else
5268 return g4x_digital_port_connected(encoder);
5269 }
5270
5271 if (INTEL_GEN(dev_priv) >= 11)
5272 return icl_digital_port_connected(encoder);
5273 else if (IS_GEN(dev_priv, 10) || IS_GEN9_BC(dev_priv))
5274 return spt_digital_port_connected(encoder);
5275 else if (IS_GEN9_LP(dev_priv))
5276 return bxt_digital_port_connected(encoder);
5277 else if (IS_GEN(dev_priv, 8))
5278 return bdw_digital_port_connected(encoder);
5279 else if (IS_GEN(dev_priv, 7))
5280 return ivb_digital_port_connected(encoder);
5281 else if (IS_GEN(dev_priv, 6))
5282 return snb_digital_port_connected(encoder);
5283 else if (IS_GEN(dev_priv, 5))
5284 return ilk_digital_port_connected(encoder);
5285
5286 MISSING_CASE(INTEL_GEN(dev_priv));
5287 return false;
5288}
5289
5290bool intel_digital_port_connected(struct intel_encoder *encoder)
5291{
5292 struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
5293 bool is_connected = false;
5294 intel_wakeref_t wakeref;
5295
5296 with_intel_display_power(dev_priv, POWER_DOMAIN_DISPLAY_CORE, wakeref)
5297 is_connected = __intel_digital_port_connected(encoder);
5298
5299 return is_connected;
5300}
5301
5302static struct edid *
5303intel_dp_get_edid(struct intel_dp *intel_dp)
5304{
5305 struct intel_connector *intel_connector = intel_dp->attached_connector;
5306
5307 /* use cached edid if we have one */
5308 if (intel_connector->edid) {
5309 /* invalid edid */
5310 if (IS_ERR(intel_connector->edid))
5311 return NULL;
5312
5313 return drm_edid_duplicate(intel_connector->edid);
5314 } else
5315 return drm_get_edid(&intel_connector->base,
5316 &intel_dp->aux.ddc);
5317}
5318
5319static void
5320intel_dp_set_edid(struct intel_dp *intel_dp)
5321{
5322 struct intel_connector *intel_connector = intel_dp->attached_connector;
5323 struct edid *edid;
5324
5325 intel_dp_unset_edid(intel_dp);
5326 edid = intel_dp_get_edid(intel_dp);
5327 intel_connector->detect_edid = edid;
5328
5329 intel_dp->has_audio = drm_detect_monitor_audio(edid);
5330 drm_dp_cec_set_edid(&intel_dp->aux, edid);
5331}
5332
5333static void
5334intel_dp_unset_edid(struct intel_dp *intel_dp)
5335{
5336 struct intel_connector *intel_connector = intel_dp->attached_connector;
5337
5338 drm_dp_cec_unset_edid(&intel_dp->aux);
5339 kfree(intel_connector->detect_edid);
5340 intel_connector->detect_edid = NULL;
5341
5342 intel_dp->has_audio = false;
5343}
5344
5345static int
5346intel_dp_detect(struct drm_connector *connector,
5347 struct drm_modeset_acquire_ctx *ctx,
5348 bool force)
5349{
5350 struct drm_i915_private *dev_priv = to_i915(connector->dev);
5351 struct intel_dp *intel_dp = intel_attached_dp(connector);
5352 struct intel_digital_port *dig_port = dp_to_dig_port(intel_dp);
5353 struct intel_encoder *encoder = &dig_port->base;
5354 enum drm_connector_status status;
5355
5356 DRM_DEBUG_KMS("[CONNECTOR:%d:%s]\n",
5357 connector->base.id, connector->name);
5358 WARN_ON(!drm_modeset_is_locked(&dev_priv->drm.mode_config.connection_mutex));
5359
5360 /* Can't disconnect eDP */
5361 if (intel_dp_is_edp(intel_dp))
5362 status = edp_detect(intel_dp);
5363 else if (intel_digital_port_connected(encoder))
5364 status = intel_dp_detect_dpcd(intel_dp);
5365 else
5366 status = connector_status_disconnected;
5367
5368 if (status == connector_status_disconnected) {
5369 memset(&intel_dp->compliance, 0, sizeof(intel_dp->compliance));
5370 memset(intel_dp->dsc_dpcd, 0, sizeof(intel_dp->dsc_dpcd));
5371
5372 if (intel_dp->is_mst) {
5373 DRM_DEBUG_KMS("MST device may have disappeared %d vs %d\n",
5374 intel_dp->is_mst,
5375 intel_dp->mst_mgr.mst_state);
5376 intel_dp->is_mst = false;
5377 drm_dp_mst_topology_mgr_set_mst(&intel_dp->mst_mgr,
5378 intel_dp->is_mst);
5379 }
5380
5381 goto out;
5382 }
5383
5384 if (intel_dp->reset_link_params) {
5385 /* Initial max link lane count */
5386 intel_dp->max_link_lane_count = intel_dp_max_common_lane_count(intel_dp);
5387
5388 /* Initial max link rate */
5389 intel_dp->max_link_rate = intel_dp_max_common_rate(intel_dp);
5390
5391 intel_dp->reset_link_params = false;
5392 }
5393
5394 intel_dp_print_rates(intel_dp);
5395
5396 /* Read DP Sink DSC Cap DPCD regs for DP v1.4 */
5397 if (INTEL_GEN(dev_priv) >= 11)
5398 intel_dp_get_dsc_sink_cap(intel_dp);
5399
5400 intel_dp_configure_mst(intel_dp);
5401
5402 if (intel_dp->is_mst) {
5403 /*
5404 * If we are in MST mode then this connector
5405 * won't appear connected or have anything
5406 * with EDID on it
5407 */
5408 status = connector_status_disconnected;
5409 goto out;
5410 }
5411
5412 /*
5413 * Some external monitors do not signal loss of link synchronization
5414 * with an IRQ_HPD, so force a link status check.
5415 */
5416 if (!intel_dp_is_edp(intel_dp)) {
5417 int ret;
5418
5419 ret = intel_dp_retrain_link(encoder, ctx);
5420 if (ret)
5421 return ret;
5422 }
5423
5424 /*
5425 * Clearing NACK and defer counts to get their exact values
5426 * while reading EDID which are required by Compliance tests
5427 * 4.2.2.4 and 4.2.2.5
5428 */
5429 intel_dp->aux.i2c_nack_count = 0;
5430 intel_dp->aux.i2c_defer_count = 0;
5431
5432 intel_dp_set_edid(intel_dp);
5433 if (intel_dp_is_edp(intel_dp) ||
5434 to_intel_connector(connector)->detect_edid)
5435 status = connector_status_connected;
5436
5437 intel_dp_check_service_irq(intel_dp);
5438
5439out:
5440 if (status != connector_status_connected && !intel_dp->is_mst)
5441 intel_dp_unset_edid(intel_dp);
5442
5443 /*
5444 * Make sure the refs for power wells enabled during detect are
5445 * dropped to avoid a new detect cycle triggered by HPD polling.
5446 */
5447 intel_display_power_flush_work(dev_priv);
5448
5449 return status;
5450}
5451
5452static void
5453intel_dp_force(struct drm_connector *connector)
5454{
5455 struct intel_dp *intel_dp = intel_attached_dp(connector);
5456 struct intel_digital_port *dig_port = dp_to_dig_port(intel_dp);
5457 struct intel_encoder *intel_encoder = &dig_port->base;
5458 struct drm_i915_private *dev_priv = to_i915(intel_encoder->base.dev);
5459 enum intel_display_power_domain aux_domain =
5460 intel_aux_power_domain(dig_port);
5461 intel_wakeref_t wakeref;
5462
5463 DRM_DEBUG_KMS("[CONNECTOR:%d:%s]\n",
5464 connector->base.id, connector->name);
5465 intel_dp_unset_edid(intel_dp);
5466
5467 if (connector->status != connector_status_connected)
5468 return;
5469
5470 wakeref = intel_display_power_get(dev_priv, aux_domain);
5471
5472 intel_dp_set_edid(intel_dp);
5473
5474 intel_display_power_put(dev_priv, aux_domain, wakeref);
5475}
5476
5477static int intel_dp_get_modes(struct drm_connector *connector)
5478{
5479 struct intel_connector *intel_connector = to_intel_connector(connector);
5480 struct edid *edid;
5481
5482 edid = intel_connector->detect_edid;
5483 if (edid) {
5484 int ret = intel_connector_update_modes(connector, edid);
5485 if (ret)
5486 return ret;
5487 }
5488
5489 /* if eDP has no EDID, fall back to fixed mode */
5490 if (intel_dp_is_edp(intel_attached_dp(connector)) &&
5491 intel_connector->panel.fixed_mode) {
5492 struct drm_display_mode *mode;
5493
5494 mode = drm_mode_duplicate(connector->dev,
5495 intel_connector->panel.fixed_mode);
5496 if (mode) {
5497 drm_mode_probed_add(connector, mode);
5498 return 1;
5499 }
5500 }
5501
5502 return 0;
5503}
5504
5505static int
5506intel_dp_connector_register(struct drm_connector *connector)
5507{
5508 struct intel_dp *intel_dp = intel_attached_dp(connector);
5509 struct drm_device *dev = connector->dev;
5510 int ret;
5511
5512 ret = intel_connector_register(connector);
5513 if (ret)
5514 return ret;
5515
5516 i915_debugfs_connector_add(connector);
5517
5518 DRM_DEBUG_KMS("registering %s bus for %s\n",
5519 intel_dp->aux.name, connector->kdev->kobj.name);
5520
5521 intel_dp->aux.dev = connector->kdev;
5522 ret = drm_dp_aux_register(&intel_dp->aux);
5523 if (!ret)
5524 drm_dp_cec_register_connector(&intel_dp->aux,
5525 connector->name, dev->dev);
5526 return ret;
5527}
5528
5529static void
5530intel_dp_connector_unregister(struct drm_connector *connector)
5531{
5532 struct intel_dp *intel_dp = intel_attached_dp(connector);
5533
5534 drm_dp_cec_unregister_connector(&intel_dp->aux);
5535 drm_dp_aux_unregister(&intel_dp->aux);
5536 intel_connector_unregister(connector);
5537}
5538
5539void intel_dp_encoder_flush_work(struct drm_encoder *encoder)
5540{
5541 struct intel_digital_port *intel_dig_port = enc_to_dig_port(encoder);
5542 struct intel_dp *intel_dp = &intel_dig_port->dp;
5543
5544 intel_dp_mst_encoder_cleanup(intel_dig_port);
5545 if (intel_dp_is_edp(intel_dp)) {
5546 intel_wakeref_t wakeref;
5547
5548 cancel_delayed_work_sync(&intel_dp->panel_vdd_work);
5549 /*
5550 * vdd might still be enabled do to the delayed vdd off.
5551 * Make sure vdd is actually turned off here.
5552 */
5553 with_pps_lock(intel_dp, wakeref)
5554 edp_panel_vdd_off_sync(intel_dp);
5555
5556 if (intel_dp->edp_notifier.notifier_call) {
5557 unregister_reboot_notifier(&intel_dp->edp_notifier);
5558 intel_dp->edp_notifier.notifier_call = NULL;
5559 }
5560 }
5561
5562 intel_dp_aux_fini(intel_dp);
5563}
5564
5565static void intel_dp_encoder_destroy(struct drm_encoder *encoder)
5566{
5567 intel_dp_encoder_flush_work(encoder);
5568
5569 drm_encoder_cleanup(encoder);
5570 kfree(enc_to_dig_port(encoder));
5571}
5572
5573void intel_dp_encoder_suspend(struct intel_encoder *intel_encoder)
5574{
5575 struct intel_dp *intel_dp = enc_to_intel_dp(&intel_encoder->base);
5576 intel_wakeref_t wakeref;
5577
5578 if (!intel_dp_is_edp(intel_dp))
5579 return;
5580
5581 /*
5582 * vdd might still be enabled do to the delayed vdd off.
5583 * Make sure vdd is actually turned off here.
5584 */
5585 cancel_delayed_work_sync(&intel_dp->panel_vdd_work);
5586 with_pps_lock(intel_dp, wakeref)
5587 edp_panel_vdd_off_sync(intel_dp);
5588}
5589
5590static void intel_dp_hdcp_wait_for_cp_irq(struct intel_hdcp *hdcp, int timeout)
5591{
5592 long ret;
5593
5594#define C (hdcp->cp_irq_count_cached != atomic_read(&hdcp->cp_irq_count))
5595 ret = wait_event_interruptible_timeout(hdcp->cp_irq_queue, C,
5596 msecs_to_jiffies(timeout));
5597
5598 if (!ret)
5599 DRM_DEBUG_KMS("Timedout at waiting for CP_IRQ\n");
5600}
5601
5602static
5603int intel_dp_hdcp_write_an_aksv(struct intel_digital_port *intel_dig_port,
5604 u8 *an)
5605{
5606 struct intel_dp *intel_dp = enc_to_intel_dp(&intel_dig_port->base.base);
5607 static const struct drm_dp_aux_msg msg = {
5608 .request = DP_AUX_NATIVE_WRITE,
5609 .address = DP_AUX_HDCP_AKSV,
5610 .size = DRM_HDCP_KSV_LEN,
5611 };
5612 u8 txbuf[HEADER_SIZE + DRM_HDCP_KSV_LEN] = {}, rxbuf[2], reply = 0;
5613 ssize_t dpcd_ret;
5614 int ret;
5615
5616 /* Output An first, that's easy */
5617 dpcd_ret = drm_dp_dpcd_write(&intel_dig_port->dp.aux, DP_AUX_HDCP_AN,
5618 an, DRM_HDCP_AN_LEN);
5619 if (dpcd_ret != DRM_HDCP_AN_LEN) {
5620 DRM_DEBUG_KMS("Failed to write An over DP/AUX (%zd)\n",
5621 dpcd_ret);
5622 return dpcd_ret >= 0 ? -EIO : dpcd_ret;
5623 }
5624
5625 /*
5626 * Since Aksv is Oh-So-Secret, we can't access it in software. So in
5627 * order to get it on the wire, we need to create the AUX header as if
5628 * we were writing the data, and then tickle the hardware to output the
5629 * data once the header is sent out.
5630 */
5631 intel_dp_aux_header(txbuf, &msg);
5632
5633 ret = intel_dp_aux_xfer(intel_dp, txbuf, HEADER_SIZE + msg.size,
5634 rxbuf, sizeof(rxbuf),
5635 DP_AUX_CH_CTL_AUX_AKSV_SELECT);
5636 if (ret < 0) {
5637 DRM_DEBUG_KMS("Write Aksv over DP/AUX failed (%d)\n", ret);
5638 return ret;
5639 } else if (ret == 0) {
5640 DRM_DEBUG_KMS("Aksv write over DP/AUX was empty\n");
5641 return -EIO;
5642 }
5643
5644 reply = (rxbuf[0] >> 4) & DP_AUX_NATIVE_REPLY_MASK;
5645 if (reply != DP_AUX_NATIVE_REPLY_ACK) {
5646 DRM_DEBUG_KMS("Aksv write: no DP_AUX_NATIVE_REPLY_ACK %x\n",
5647 reply);
5648 return -EIO;
5649 }
5650 return 0;
5651}
5652
5653static int intel_dp_hdcp_read_bksv(struct intel_digital_port *intel_dig_port,
5654 u8 *bksv)
5655{
5656 ssize_t ret;
5657 ret = drm_dp_dpcd_read(&intel_dig_port->dp.aux, DP_AUX_HDCP_BKSV, bksv,
5658 DRM_HDCP_KSV_LEN);
5659 if (ret != DRM_HDCP_KSV_LEN) {
5660 DRM_DEBUG_KMS("Read Bksv from DP/AUX failed (%zd)\n", ret);
5661 return ret >= 0 ? -EIO : ret;
5662 }
5663 return 0;
5664}
5665
5666static int intel_dp_hdcp_read_bstatus(struct intel_digital_port *intel_dig_port,
5667 u8 *bstatus)
5668{
5669 ssize_t ret;
5670 /*
5671 * For some reason the HDMI and DP HDCP specs call this register
5672 * definition by different names. In the HDMI spec, it's called BSTATUS,
5673 * but in DP it's called BINFO.
5674 */
5675 ret = drm_dp_dpcd_read(&intel_dig_port->dp.aux, DP_AUX_HDCP_BINFO,
5676 bstatus, DRM_HDCP_BSTATUS_LEN);
5677 if (ret != DRM_HDCP_BSTATUS_LEN) {
5678 DRM_DEBUG_KMS("Read bstatus from DP/AUX failed (%zd)\n", ret);
5679 return ret >= 0 ? -EIO : ret;
5680 }
5681 return 0;
5682}
5683
5684static
5685int intel_dp_hdcp_read_bcaps(struct intel_digital_port *intel_dig_port,
5686 u8 *bcaps)
5687{
5688 ssize_t ret;
5689
5690 ret = drm_dp_dpcd_read(&intel_dig_port->dp.aux, DP_AUX_HDCP_BCAPS,
5691 bcaps, 1);
5692 if (ret != 1) {
5693 DRM_DEBUG_KMS("Read bcaps from DP/AUX failed (%zd)\n", ret);
5694 return ret >= 0 ? -EIO : ret;
5695 }
5696
5697 return 0;
5698}
5699
5700static
5701int intel_dp_hdcp_repeater_present(struct intel_digital_port *intel_dig_port,
5702 bool *repeater_present)
5703{
5704 ssize_t ret;
5705 u8 bcaps;
5706
5707 ret = intel_dp_hdcp_read_bcaps(intel_dig_port, &bcaps);
5708 if (ret)
5709 return ret;
5710
5711 *repeater_present = bcaps & DP_BCAPS_REPEATER_PRESENT;
5712 return 0;
5713}
5714
5715static
5716int intel_dp_hdcp_read_ri_prime(struct intel_digital_port *intel_dig_port,
5717 u8 *ri_prime)
5718{
5719 ssize_t ret;
5720 ret = drm_dp_dpcd_read(&intel_dig_port->dp.aux, DP_AUX_HDCP_RI_PRIME,
5721 ri_prime, DRM_HDCP_RI_LEN);
5722 if (ret != DRM_HDCP_RI_LEN) {
5723 DRM_DEBUG_KMS("Read Ri' from DP/AUX failed (%zd)\n", ret);
5724 return ret >= 0 ? -EIO : ret;
5725 }
5726 return 0;
5727}
5728
5729static
5730int intel_dp_hdcp_read_ksv_ready(struct intel_digital_port *intel_dig_port,
5731 bool *ksv_ready)
5732{
5733 ssize_t ret;
5734 u8 bstatus;
5735 ret = drm_dp_dpcd_read(&intel_dig_port->dp.aux, DP_AUX_HDCP_BSTATUS,
5736 &bstatus, 1);
5737 if (ret != 1) {
5738 DRM_DEBUG_KMS("Read bstatus from DP/AUX failed (%zd)\n", ret);
5739 return ret >= 0 ? -EIO : ret;
5740 }
5741 *ksv_ready = bstatus & DP_BSTATUS_READY;
5742 return 0;
5743}
5744
5745static
5746int intel_dp_hdcp_read_ksv_fifo(struct intel_digital_port *intel_dig_port,
5747 int num_downstream, u8 *ksv_fifo)
5748{
5749 ssize_t ret;
5750 int i;
5751
5752 /* KSV list is read via 15 byte window (3 entries @ 5 bytes each) */
5753 for (i = 0; i < num_downstream; i += 3) {
5754 size_t len = min(num_downstream - i, 3) * DRM_HDCP_KSV_LEN;
5755 ret = drm_dp_dpcd_read(&intel_dig_port->dp.aux,
5756 DP_AUX_HDCP_KSV_FIFO,
5757 ksv_fifo + i * DRM_HDCP_KSV_LEN,
5758 len);
5759 if (ret != len) {
5760 DRM_DEBUG_KMS("Read ksv[%d] from DP/AUX failed (%zd)\n",
5761 i, ret);
5762 return ret >= 0 ? -EIO : ret;
5763 }
5764 }
5765 return 0;
5766}
5767
5768static
5769int intel_dp_hdcp_read_v_prime_part(struct intel_digital_port *intel_dig_port,
5770 int i, u32 *part)
5771{
5772 ssize_t ret;
5773
5774 if (i >= DRM_HDCP_V_PRIME_NUM_PARTS)
5775 return -EINVAL;
5776
5777 ret = drm_dp_dpcd_read(&intel_dig_port->dp.aux,
5778 DP_AUX_HDCP_V_PRIME(i), part,
5779 DRM_HDCP_V_PRIME_PART_LEN);
5780 if (ret != DRM_HDCP_V_PRIME_PART_LEN) {
5781 DRM_DEBUG_KMS("Read v'[%d] from DP/AUX failed (%zd)\n", i, ret);
5782 return ret >= 0 ? -EIO : ret;
5783 }
5784 return 0;
5785}
5786
5787static
5788int intel_dp_hdcp_toggle_signalling(struct intel_digital_port *intel_dig_port,
5789 bool enable)
5790{
5791 /* Not used for single stream DisplayPort setups */
5792 return 0;
5793}
5794
5795static
5796bool intel_dp_hdcp_check_link(struct intel_digital_port *intel_dig_port)
5797{
5798 ssize_t ret;
5799 u8 bstatus;
5800
5801 ret = drm_dp_dpcd_read(&intel_dig_port->dp.aux, DP_AUX_HDCP_BSTATUS,
5802 &bstatus, 1);
5803 if (ret != 1) {
5804 DRM_DEBUG_KMS("Read bstatus from DP/AUX failed (%zd)\n", ret);
5805 return false;
5806 }
5807
5808 return !(bstatus & (DP_BSTATUS_LINK_FAILURE | DP_BSTATUS_REAUTH_REQ));
5809}
5810
5811static
5812int intel_dp_hdcp_capable(struct intel_digital_port *intel_dig_port,
5813 bool *hdcp_capable)
5814{
5815 ssize_t ret;
5816 u8 bcaps;
5817
5818 ret = intel_dp_hdcp_read_bcaps(intel_dig_port, &bcaps);
5819 if (ret)
5820 return ret;
5821
5822 *hdcp_capable = bcaps & DP_BCAPS_HDCP_CAPABLE;
5823 return 0;
5824}
5825
5826struct hdcp2_dp_errata_stream_type {
5827 u8 msg_id;
5828 u8 stream_type;
5829} __packed;
5830
5831struct hdcp2_dp_msg_data {
5832 u8 msg_id;
5833 u32 offset;
5834 bool msg_detectable;
5835 u32 timeout;
5836 u32 timeout2; /* Added for non_paired situation */
5837};
5838
5839static const struct hdcp2_dp_msg_data hdcp2_dp_msg_data[] = {
5840 { HDCP_2_2_AKE_INIT, DP_HDCP_2_2_AKE_INIT_OFFSET, false, 0, 0 },
5841 { HDCP_2_2_AKE_SEND_CERT, DP_HDCP_2_2_AKE_SEND_CERT_OFFSET,
5842 false, HDCP_2_2_CERT_TIMEOUT_MS, 0 },
5843 { HDCP_2_2_AKE_NO_STORED_KM, DP_HDCP_2_2_AKE_NO_STORED_KM_OFFSET,
5844 false, 0, 0 },
5845 { HDCP_2_2_AKE_STORED_KM, DP_HDCP_2_2_AKE_STORED_KM_OFFSET,
5846 false, 0, 0 },
5847 { HDCP_2_2_AKE_SEND_HPRIME, DP_HDCP_2_2_AKE_SEND_HPRIME_OFFSET,
5848 true, HDCP_2_2_HPRIME_PAIRED_TIMEOUT_MS,
5849 HDCP_2_2_HPRIME_NO_PAIRED_TIMEOUT_MS },
5850 { HDCP_2_2_AKE_SEND_PAIRING_INFO,
5851 DP_HDCP_2_2_AKE_SEND_PAIRING_INFO_OFFSET, true,
5852 HDCP_2_2_PAIRING_TIMEOUT_MS, 0 },
5853 { HDCP_2_2_LC_INIT, DP_HDCP_2_2_LC_INIT_OFFSET, false, 0, 0 },
5854 { HDCP_2_2_LC_SEND_LPRIME, DP_HDCP_2_2_LC_SEND_LPRIME_OFFSET,
5855 false, HDCP_2_2_DP_LPRIME_TIMEOUT_MS, 0 },
5856 { HDCP_2_2_SKE_SEND_EKS, DP_HDCP_2_2_SKE_SEND_EKS_OFFSET, false,
5857 0, 0 },
5858 { HDCP_2_2_REP_SEND_RECVID_LIST,
5859 DP_HDCP_2_2_REP_SEND_RECVID_LIST_OFFSET, true,
5860 HDCP_2_2_RECVID_LIST_TIMEOUT_MS, 0 },
5861 { HDCP_2_2_REP_SEND_ACK, DP_HDCP_2_2_REP_SEND_ACK_OFFSET, false,
5862 0, 0 },
5863 { HDCP_2_2_REP_STREAM_MANAGE,
5864 DP_HDCP_2_2_REP_STREAM_MANAGE_OFFSET, false,
5865 0, 0 },
5866 { HDCP_2_2_REP_STREAM_READY, DP_HDCP_2_2_REP_STREAM_READY_OFFSET,
5867 false, HDCP_2_2_STREAM_READY_TIMEOUT_MS, 0 },
5868/* local define to shovel this through the write_2_2 interface */
5869#define HDCP_2_2_ERRATA_DP_STREAM_TYPE 50
5870 { HDCP_2_2_ERRATA_DP_STREAM_TYPE,
5871 DP_HDCP_2_2_REG_STREAM_TYPE_OFFSET, false,
5872 0, 0 },
5873};
5874
5875static inline
5876int intel_dp_hdcp2_read_rx_status(struct intel_digital_port *intel_dig_port,
5877 u8 *rx_status)
5878{
5879 ssize_t ret;
5880
5881 ret = drm_dp_dpcd_read(&intel_dig_port->dp.aux,
5882 DP_HDCP_2_2_REG_RXSTATUS_OFFSET, rx_status,
5883 HDCP_2_2_DP_RXSTATUS_LEN);
5884 if (ret != HDCP_2_2_DP_RXSTATUS_LEN) {
5885 DRM_DEBUG_KMS("Read bstatus from DP/AUX failed (%zd)\n", ret);
5886 return ret >= 0 ? -EIO : ret;
5887 }
5888
5889 return 0;
5890}
5891
5892static
5893int hdcp2_detect_msg_availability(struct intel_digital_port *intel_dig_port,
5894 u8 msg_id, bool *msg_ready)
5895{
5896 u8 rx_status;
5897 int ret;
5898
5899 *msg_ready = false;
5900 ret = intel_dp_hdcp2_read_rx_status(intel_dig_port, &rx_status);
5901 if (ret < 0)
5902 return ret;
5903
5904 switch (msg_id) {
5905 case HDCP_2_2_AKE_SEND_HPRIME:
5906 if (HDCP_2_2_DP_RXSTATUS_H_PRIME(rx_status))
5907 *msg_ready = true;
5908 break;
5909 case HDCP_2_2_AKE_SEND_PAIRING_INFO:
5910 if (HDCP_2_2_DP_RXSTATUS_PAIRING(rx_status))
5911 *msg_ready = true;
5912 break;
5913 case HDCP_2_2_REP_SEND_RECVID_LIST:
5914 if (HDCP_2_2_DP_RXSTATUS_READY(rx_status))
5915 *msg_ready = true;
5916 break;
5917 default:
5918 DRM_ERROR("Unidentified msg_id: %d\n", msg_id);
5919 return -EINVAL;
5920 }
5921
5922 return 0;
5923}
5924
5925static ssize_t
5926intel_dp_hdcp2_wait_for_msg(struct intel_digital_port *intel_dig_port,
5927 const struct hdcp2_dp_msg_data *hdcp2_msg_data)
5928{
5929 struct intel_dp *dp = &intel_dig_port->dp;
5930 struct intel_hdcp *hdcp = &dp->attached_connector->hdcp;
5931 u8 msg_id = hdcp2_msg_data->msg_id;
5932 int ret, timeout;
5933 bool msg_ready = false;
5934
5935 if (msg_id == HDCP_2_2_AKE_SEND_HPRIME && !hdcp->is_paired)
5936 timeout = hdcp2_msg_data->timeout2;
5937 else
5938 timeout = hdcp2_msg_data->timeout;
5939
5940 /*
5941 * There is no way to detect the CERT, LPRIME and STREAM_READY
5942 * availability. So Wait for timeout and read the msg.
5943 */
5944 if (!hdcp2_msg_data->msg_detectable) {
5945 mdelay(timeout);
5946 ret = 0;
5947 } else {
5948 /*
5949 * As we want to check the msg availability at timeout, Ignoring
5950 * the timeout at wait for CP_IRQ.
5951 */
5952 intel_dp_hdcp_wait_for_cp_irq(hdcp, timeout);
5953 ret = hdcp2_detect_msg_availability(intel_dig_port,
5954 msg_id, &msg_ready);
5955 if (!msg_ready)
5956 ret = -ETIMEDOUT;
5957 }
5958
5959 if (ret)
5960 DRM_DEBUG_KMS("msg_id %d, ret %d, timeout(mSec): %d\n",
5961 hdcp2_msg_data->msg_id, ret, timeout);
5962
5963 return ret;
5964}
5965
5966static const struct hdcp2_dp_msg_data *get_hdcp2_dp_msg_data(u8 msg_id)
5967{
5968 int i;
5969
5970 for (i = 0; i < ARRAY_SIZE(hdcp2_dp_msg_data); i++)
5971 if (hdcp2_dp_msg_data[i].msg_id == msg_id)
5972 return &hdcp2_dp_msg_data[i];
5973
5974 return NULL;
5975}
5976
5977static
5978int intel_dp_hdcp2_write_msg(struct intel_digital_port *intel_dig_port,
5979 void *buf, size_t size)
5980{
5981 struct intel_dp *dp = &intel_dig_port->dp;
5982 struct intel_hdcp *hdcp = &dp->attached_connector->hdcp;
5983 unsigned int offset;
5984 u8 *byte = buf;
5985 ssize_t ret, bytes_to_write, len;
5986 const struct hdcp2_dp_msg_data *hdcp2_msg_data;
5987
5988 hdcp2_msg_data = get_hdcp2_dp_msg_data(*byte);
5989 if (!hdcp2_msg_data)
5990 return -EINVAL;
5991
5992 offset = hdcp2_msg_data->offset;
5993
5994 /* No msg_id in DP HDCP2.2 msgs */
5995 bytes_to_write = size - 1;
5996 byte++;
5997
5998 hdcp->cp_irq_count_cached = atomic_read(&hdcp->cp_irq_count);
5999
6000 while (bytes_to_write) {
6001 len = bytes_to_write > DP_AUX_MAX_PAYLOAD_BYTES ?
6002 DP_AUX_MAX_PAYLOAD_BYTES : bytes_to_write;
6003
6004 ret = drm_dp_dpcd_write(&intel_dig_port->dp.aux,
6005 offset, (void *)byte, len);
6006 if (ret < 0)
6007 return ret;
6008
6009 bytes_to_write -= ret;
6010 byte += ret;
6011 offset += ret;
6012 }
6013
6014 return size;
6015}
6016
6017static
6018ssize_t get_receiver_id_list_size(struct intel_digital_port *intel_dig_port)
6019{
6020 u8 rx_info[HDCP_2_2_RXINFO_LEN];
6021 u32 dev_cnt;
6022 ssize_t ret;
6023
6024 ret = drm_dp_dpcd_read(&intel_dig_port->dp.aux,
6025 DP_HDCP_2_2_REG_RXINFO_OFFSET,
6026 (void *)rx_info, HDCP_2_2_RXINFO_LEN);
6027 if (ret != HDCP_2_2_RXINFO_LEN)
6028 return ret >= 0 ? -EIO : ret;
6029
6030 dev_cnt = (HDCP_2_2_DEV_COUNT_HI(rx_info[0]) << 4 |
6031 HDCP_2_2_DEV_COUNT_LO(rx_info[1]));
6032
6033 if (dev_cnt > HDCP_2_2_MAX_DEVICE_COUNT)
6034 dev_cnt = HDCP_2_2_MAX_DEVICE_COUNT;
6035
6036 ret = sizeof(struct hdcp2_rep_send_receiverid_list) -
6037 HDCP_2_2_RECEIVER_IDS_MAX_LEN +
6038 (dev_cnt * HDCP_2_2_RECEIVER_ID_LEN);
6039
6040 return ret;
6041}
6042
6043static
6044int intel_dp_hdcp2_read_msg(struct intel_digital_port *intel_dig_port,
6045 u8 msg_id, void *buf, size_t size)
6046{
6047 unsigned int offset;
6048 u8 *byte = buf;
6049 ssize_t ret, bytes_to_recv, len;
6050 const struct hdcp2_dp_msg_data *hdcp2_msg_data;
6051
6052 hdcp2_msg_data = get_hdcp2_dp_msg_data(msg_id);
6053 if (!hdcp2_msg_data)
6054 return -EINVAL;
6055 offset = hdcp2_msg_data->offset;
6056
6057 ret = intel_dp_hdcp2_wait_for_msg(intel_dig_port, hdcp2_msg_data);
6058 if (ret < 0)
6059 return ret;
6060
6061 if (msg_id == HDCP_2_2_REP_SEND_RECVID_LIST) {
6062 ret = get_receiver_id_list_size(intel_dig_port);
6063 if (ret < 0)
6064 return ret;
6065
6066 size = ret;
6067 }
6068 bytes_to_recv = size - 1;
6069
6070 /* DP adaptation msgs has no msg_id */
6071 byte++;
6072
6073 while (bytes_to_recv) {
6074 len = bytes_to_recv > DP_AUX_MAX_PAYLOAD_BYTES ?
6075 DP_AUX_MAX_PAYLOAD_BYTES : bytes_to_recv;
6076
6077 ret = drm_dp_dpcd_read(&intel_dig_port->dp.aux, offset,
6078 (void *)byte, len);
6079 if (ret < 0) {
6080 DRM_DEBUG_KMS("msg_id %d, ret %zd\n", msg_id, ret);
6081 return ret;
6082 }
6083
6084 bytes_to_recv -= ret;
6085 byte += ret;
6086 offset += ret;
6087 }
6088 byte = buf;
6089 *byte = msg_id;
6090
6091 return size;
6092}
6093
6094static
6095int intel_dp_hdcp2_config_stream_type(struct intel_digital_port *intel_dig_port,
6096 bool is_repeater, u8 content_type)
6097{
6098 struct hdcp2_dp_errata_stream_type stream_type_msg;
6099
6100 if (is_repeater)
6101 return 0;
6102
6103 /*
6104 * Errata for DP: As Stream type is used for encryption, Receiver
6105 * should be communicated with stream type for the decryption of the
6106 * content.
6107 * Repeater will be communicated with stream type as a part of it's
6108 * auth later in time.
6109 */
6110 stream_type_msg.msg_id = HDCP_2_2_ERRATA_DP_STREAM_TYPE;
6111 stream_type_msg.stream_type = content_type;
6112
6113 return intel_dp_hdcp2_write_msg(intel_dig_port, &stream_type_msg,
6114 sizeof(stream_type_msg));
6115}
6116
6117static
6118int intel_dp_hdcp2_check_link(struct intel_digital_port *intel_dig_port)
6119{
6120 u8 rx_status;
6121 int ret;
6122
6123 ret = intel_dp_hdcp2_read_rx_status(intel_dig_port, &rx_status);
6124 if (ret)
6125 return ret;
6126
6127 if (HDCP_2_2_DP_RXSTATUS_REAUTH_REQ(rx_status))
6128 ret = HDCP_REAUTH_REQUEST;
6129 else if (HDCP_2_2_DP_RXSTATUS_LINK_FAILED(rx_status))
6130 ret = HDCP_LINK_INTEGRITY_FAILURE;
6131 else if (HDCP_2_2_DP_RXSTATUS_READY(rx_status))
6132 ret = HDCP_TOPOLOGY_CHANGE;
6133
6134 return ret;
6135}
6136
6137static
6138int intel_dp_hdcp2_capable(struct intel_digital_port *intel_dig_port,
6139 bool *capable)
6140{
6141 u8 rx_caps[3];
6142 int ret;
6143
6144 *capable = false;
6145 ret = drm_dp_dpcd_read(&intel_dig_port->dp.aux,
6146 DP_HDCP_2_2_REG_RX_CAPS_OFFSET,
6147 rx_caps, HDCP_2_2_RXCAPS_LEN);
6148 if (ret != HDCP_2_2_RXCAPS_LEN)
6149 return ret >= 0 ? -EIO : ret;
6150
6151 if (rx_caps[0] == HDCP_2_2_RX_CAPS_VERSION_VAL &&
6152 HDCP_2_2_DP_HDCP_CAPABLE(rx_caps[2]))
6153 *capable = true;
6154
6155 return 0;
6156}
6157
6158static const struct intel_hdcp_shim intel_dp_hdcp_shim = {
6159 .write_an_aksv = intel_dp_hdcp_write_an_aksv,
6160 .read_bksv = intel_dp_hdcp_read_bksv,
6161 .read_bstatus = intel_dp_hdcp_read_bstatus,
6162 .repeater_present = intel_dp_hdcp_repeater_present,
6163 .read_ri_prime = intel_dp_hdcp_read_ri_prime,
6164 .read_ksv_ready = intel_dp_hdcp_read_ksv_ready,
6165 .read_ksv_fifo = intel_dp_hdcp_read_ksv_fifo,
6166 .read_v_prime_part = intel_dp_hdcp_read_v_prime_part,
6167 .toggle_signalling = intel_dp_hdcp_toggle_signalling,
6168 .check_link = intel_dp_hdcp_check_link,
6169 .hdcp_capable = intel_dp_hdcp_capable,
6170 .write_2_2_msg = intel_dp_hdcp2_write_msg,
6171 .read_2_2_msg = intel_dp_hdcp2_read_msg,
6172 .config_stream_type = intel_dp_hdcp2_config_stream_type,
6173 .check_2_2_link = intel_dp_hdcp2_check_link,
6174 .hdcp_2_2_capable = intel_dp_hdcp2_capable,
6175 .protocol = HDCP_PROTOCOL_DP,
6176};
6177
6178static void intel_edp_panel_vdd_sanitize(struct intel_dp *intel_dp)
6179{
6180 struct drm_i915_private *dev_priv = dp_to_i915(intel_dp);
6181 struct intel_digital_port *dig_port = dp_to_dig_port(intel_dp);
6182
6183 lockdep_assert_held(&dev_priv->pps_mutex);
6184
6185 if (!edp_have_panel_vdd(intel_dp))
6186 return;
6187
6188 /*
6189 * The VDD bit needs a power domain reference, so if the bit is
6190 * already enabled when we boot or resume, grab this reference and
6191 * schedule a vdd off, so we don't hold on to the reference
6192 * indefinitely.
6193 */
6194 DRM_DEBUG_KMS("VDD left on by BIOS, adjusting state tracking\n");
6195 intel_display_power_get(dev_priv, intel_aux_power_domain(dig_port));
6196
6197 edp_panel_vdd_schedule_off(intel_dp);
6198}
6199
6200static enum pipe vlv_active_pipe(struct intel_dp *intel_dp)
6201{
6202 struct drm_i915_private *dev_priv = dp_to_i915(intel_dp);
6203 struct intel_encoder *encoder = &dp_to_dig_port(intel_dp)->base;
6204 enum pipe pipe;
6205
6206 if (intel_dp_port_enabled(dev_priv, intel_dp->output_reg,
6207 encoder->port, &pipe))
6208 return pipe;
6209
6210 return INVALID_PIPE;
6211}
6212
6213void intel_dp_encoder_reset(struct drm_encoder *encoder)
6214{
6215 struct drm_i915_private *dev_priv = to_i915(encoder->dev);
6216 struct intel_dp *intel_dp = enc_to_intel_dp(encoder);
6217 struct intel_lspcon *lspcon = dp_to_lspcon(intel_dp);
6218 intel_wakeref_t wakeref;
6219
6220 if (!HAS_DDI(dev_priv))
6221 intel_dp->DP = I915_READ(intel_dp->output_reg);
6222
6223 if (lspcon->active)
6224 lspcon_resume(lspcon);
6225
6226 intel_dp->reset_link_params = true;
6227
6228 if (!IS_VALLEYVIEW(dev_priv) && !IS_CHERRYVIEW(dev_priv) &&
6229 !intel_dp_is_edp(intel_dp))
6230 return;
6231
6232 with_pps_lock(intel_dp, wakeref) {
6233 if (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv))
6234 intel_dp->active_pipe = vlv_active_pipe(intel_dp);
6235
6236 if (intel_dp_is_edp(intel_dp)) {
6237 /*
6238 * Reinit the power sequencer, in case BIOS did
6239 * something nasty with it.
6240 */
6241 intel_dp_pps_init(intel_dp);
6242 intel_edp_panel_vdd_sanitize(intel_dp);
6243 }
6244 }
6245}
6246
6247static const struct drm_connector_funcs intel_dp_connector_funcs = {
6248 .force = intel_dp_force,
6249 .fill_modes = drm_helper_probe_single_connector_modes,
6250 .atomic_get_property = intel_digital_connector_atomic_get_property,
6251 .atomic_set_property = intel_digital_connector_atomic_set_property,
6252 .late_register = intel_dp_connector_register,
6253 .early_unregister = intel_dp_connector_unregister,
6254 .destroy = intel_connector_destroy,
6255 .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
6256 .atomic_duplicate_state = intel_digital_connector_duplicate_state,
6257};
6258
6259static const struct drm_connector_helper_funcs intel_dp_connector_helper_funcs = {
6260 .detect_ctx = intel_dp_detect,
6261 .get_modes = intel_dp_get_modes,
6262 .mode_valid = intel_dp_mode_valid,
6263 .atomic_check = intel_digital_connector_atomic_check,
6264};
6265
6266static const struct drm_encoder_funcs intel_dp_enc_funcs = {
6267 .reset = intel_dp_encoder_reset,
6268 .destroy = intel_dp_encoder_destroy,
6269};
6270
6271enum irqreturn
6272intel_dp_hpd_pulse(struct intel_digital_port *intel_dig_port, bool long_hpd)
6273{
6274 struct intel_dp *intel_dp = &intel_dig_port->dp;
6275
6276 if (long_hpd && intel_dig_port->base.type == INTEL_OUTPUT_EDP) {
6277 /*
6278 * vdd off can generate a long pulse on eDP which
6279 * would require vdd on to handle it, and thus we
6280 * would end up in an endless cycle of
6281 * "vdd off -> long hpd -> vdd on -> detect -> vdd off -> ..."
6282 */
6283 DRM_DEBUG_KMS("ignoring long hpd on eDP port %c\n",
6284 port_name(intel_dig_port->base.port));
6285 return IRQ_HANDLED;
6286 }
6287
6288 DRM_DEBUG_KMS("got hpd irq on port %c - %s\n",
6289 port_name(intel_dig_port->base.port),
6290 long_hpd ? "long" : "short");
6291
6292 if (long_hpd) {
6293 intel_dp->reset_link_params = true;
6294 return IRQ_NONE;
6295 }
6296
6297 if (intel_dp->is_mst) {
6298 if (intel_dp_check_mst_status(intel_dp) == -EINVAL) {
6299 /*
6300 * If we were in MST mode, and device is not
6301 * there, get out of MST mode
6302 */
6303 DRM_DEBUG_KMS("MST device may have disappeared %d vs %d\n",
6304 intel_dp->is_mst, intel_dp->mst_mgr.mst_state);
6305 intel_dp->is_mst = false;
6306 drm_dp_mst_topology_mgr_set_mst(&intel_dp->mst_mgr,
6307 intel_dp->is_mst);
6308
6309 return IRQ_NONE;
6310 }
6311 }
6312
6313 if (!intel_dp->is_mst) {
6314 bool handled;
6315
6316 handled = intel_dp_short_pulse(intel_dp);
6317
6318 if (!handled)
6319 return IRQ_NONE;
6320 }
6321
6322 return IRQ_HANDLED;
6323}
6324
6325/* check the VBT to see whether the eDP is on another port */
6326bool intel_dp_is_port_edp(struct drm_i915_private *dev_priv, enum port port)
6327{
6328 /*
6329 * eDP not supported on g4x. so bail out early just
6330 * for a bit extra safety in case the VBT is bonkers.
6331 */
6332 if (INTEL_GEN(dev_priv) < 5)
6333 return false;
6334
6335 if (INTEL_GEN(dev_priv) < 9 && port == PORT_A)
6336 return true;
6337
6338 return intel_bios_is_port_edp(dev_priv, port);
6339}
6340
6341static void
6342intel_dp_add_properties(struct intel_dp *intel_dp, struct drm_connector *connector)
6343{
6344 struct drm_i915_private *dev_priv = to_i915(connector->dev);
6345 enum port port = dp_to_dig_port(intel_dp)->base.port;
6346
6347 if (!IS_G4X(dev_priv) && port != PORT_A)
6348 intel_attach_force_audio_property(connector);
6349
6350 intel_attach_broadcast_rgb_property(connector);
6351 if (HAS_GMCH(dev_priv))
6352 drm_connector_attach_max_bpc_property(connector, 6, 10);
6353 else if (INTEL_GEN(dev_priv) >= 5)
6354 drm_connector_attach_max_bpc_property(connector, 6, 12);
6355
6356 if (intel_dp_is_edp(intel_dp)) {
6357 u32 allowed_scalers;
6358
6359 allowed_scalers = BIT(DRM_MODE_SCALE_ASPECT) | BIT(DRM_MODE_SCALE_FULLSCREEN);
6360 if (!HAS_GMCH(dev_priv))
6361 allowed_scalers |= BIT(DRM_MODE_SCALE_CENTER);
6362
6363 drm_connector_attach_scaling_mode_property(connector, allowed_scalers);
6364
6365 connector->state->scaling_mode = DRM_MODE_SCALE_ASPECT;
6366
6367 }
6368}
6369
6370static void intel_dp_init_panel_power_timestamps(struct intel_dp *intel_dp)
6371{
6372 intel_dp->panel_power_off_time = ktime_get_boottime();
6373 intel_dp->last_power_on = jiffies;
6374 intel_dp->last_backlight_off = jiffies;
6375}
6376
6377static void
6378intel_pps_readout_hw_state(struct intel_dp *intel_dp, struct edp_power_seq *seq)
6379{
6380 struct drm_i915_private *dev_priv = dp_to_i915(intel_dp);
6381 u32 pp_on, pp_off, pp_ctl;
6382 struct pps_registers regs;
6383
6384 intel_pps_get_registers(intel_dp, ®s);
6385
6386 pp_ctl = ironlake_get_pp_control(intel_dp);
6387
6388 /* Ensure PPS is unlocked */
6389 if (!HAS_DDI(dev_priv))
6390 I915_WRITE(regs.pp_ctrl, pp_ctl);
6391
6392 pp_on = I915_READ(regs.pp_on);
6393 pp_off = I915_READ(regs.pp_off);
6394
6395 /* Pull timing values out of registers */
6396 seq->t1_t3 = REG_FIELD_GET(PANEL_POWER_UP_DELAY_MASK, pp_on);
6397 seq->t8 = REG_FIELD_GET(PANEL_LIGHT_ON_DELAY_MASK, pp_on);
6398 seq->t9 = REG_FIELD_GET(PANEL_LIGHT_OFF_DELAY_MASK, pp_off);
6399 seq->t10 = REG_FIELD_GET(PANEL_POWER_DOWN_DELAY_MASK, pp_off);
6400
6401 if (i915_mmio_reg_valid(regs.pp_div)) {
6402 u32 pp_div;
6403
6404 pp_div = I915_READ(regs.pp_div);
6405
6406 seq->t11_t12 = REG_FIELD_GET(PANEL_POWER_CYCLE_DELAY_MASK, pp_div) * 1000;
6407 } else {
6408 seq->t11_t12 = REG_FIELD_GET(BXT_POWER_CYCLE_DELAY_MASK, pp_ctl) * 1000;
6409 }
6410}
6411
6412static void
6413intel_pps_dump_state(const char *state_name, const struct edp_power_seq *seq)
6414{
6415 DRM_DEBUG_KMS("%s t1_t3 %d t8 %d t9 %d t10 %d t11_t12 %d\n",
6416 state_name,
6417 seq->t1_t3, seq->t8, seq->t9, seq->t10, seq->t11_t12);
6418}
6419
6420static void
6421intel_pps_verify_state(struct intel_dp *intel_dp)
6422{
6423 struct edp_power_seq hw;
6424 struct edp_power_seq *sw = &intel_dp->pps_delays;
6425
6426 intel_pps_readout_hw_state(intel_dp, &hw);
6427
6428 if (hw.t1_t3 != sw->t1_t3 || hw.t8 != sw->t8 || hw.t9 != sw->t9 ||
6429 hw.t10 != sw->t10 || hw.t11_t12 != sw->t11_t12) {
6430 DRM_ERROR("PPS state mismatch\n");
6431 intel_pps_dump_state("sw", sw);
6432 intel_pps_dump_state("hw", &hw);
6433 }
6434}
6435
6436static void
6437intel_dp_init_panel_power_sequencer(struct intel_dp *intel_dp)
6438{
6439 struct drm_i915_private *dev_priv = dp_to_i915(intel_dp);
6440 struct edp_power_seq cur, vbt, spec,
6441 *final = &intel_dp->pps_delays;
6442
6443 lockdep_assert_held(&dev_priv->pps_mutex);
6444
6445 /* already initialized? */
6446 if (final->t11_t12 != 0)
6447 return;
6448
6449 intel_pps_readout_hw_state(intel_dp, &cur);
6450
6451 intel_pps_dump_state("cur", &cur);
6452
6453 vbt = dev_priv->vbt.edp.pps;
6454 /* On Toshiba Satellite P50-C-18C system the VBT T12 delay
6455 * of 500ms appears to be too short. Ocassionally the panel
6456 * just fails to power back on. Increasing the delay to 800ms
6457 * seems sufficient to avoid this problem.
6458 */
6459 if (dev_priv->quirks & QUIRK_INCREASE_T12_DELAY) {
6460 vbt.t11_t12 = max_t(u16, vbt.t11_t12, 1300 * 10);
6461 DRM_DEBUG_KMS("Increasing T12 panel delay as per the quirk to %d\n",
6462 vbt.t11_t12);
6463 }
6464 /* T11_T12 delay is special and actually in units of 100ms, but zero
6465 * based in the hw (so we need to add 100 ms). But the sw vbt
6466 * table multiplies it with 1000 to make it in units of 100usec,
6467 * too. */
6468 vbt.t11_t12 += 100 * 10;
6469
6470 /* Upper limits from eDP 1.3 spec. Note that we use the clunky units of
6471 * our hw here, which are all in 100usec. */
6472 spec.t1_t3 = 210 * 10;
6473 spec.t8 = 50 * 10; /* no limit for t8, use t7 instead */
6474 spec.t9 = 50 * 10; /* no limit for t9, make it symmetric with t8 */
6475 spec.t10 = 500 * 10;
6476 /* This one is special and actually in units of 100ms, but zero
6477 * based in the hw (so we need to add 100 ms). But the sw vbt
6478 * table multiplies it with 1000 to make it in units of 100usec,
6479 * too. */
6480 spec.t11_t12 = (510 + 100) * 10;
6481
6482 intel_pps_dump_state("vbt", &vbt);
6483
6484 /* Use the max of the register settings and vbt. If both are
6485 * unset, fall back to the spec limits. */
6486#define assign_final(field) final->field = (max(cur.field, vbt.field) == 0 ? \
6487 spec.field : \
6488 max(cur.field, vbt.field))
6489 assign_final(t1_t3);
6490 assign_final(t8);
6491 assign_final(t9);
6492 assign_final(t10);
6493 assign_final(t11_t12);
6494#undef assign_final
6495
6496#define get_delay(field) (DIV_ROUND_UP(final->field, 10))
6497 intel_dp->panel_power_up_delay = get_delay(t1_t3);
6498 intel_dp->backlight_on_delay = get_delay(t8);
6499 intel_dp->backlight_off_delay = get_delay(t9);
6500 intel_dp->panel_power_down_delay = get_delay(t10);
6501 intel_dp->panel_power_cycle_delay = get_delay(t11_t12);
6502#undef get_delay
6503
6504 DRM_DEBUG_KMS("panel power up delay %d, power down delay %d, power cycle delay %d\n",
6505 intel_dp->panel_power_up_delay, intel_dp->panel_power_down_delay,
6506 intel_dp->panel_power_cycle_delay);
6507
6508 DRM_DEBUG_KMS("backlight on delay %d, off delay %d\n",
6509 intel_dp->backlight_on_delay, intel_dp->backlight_off_delay);
6510
6511 /*
6512 * We override the HW backlight delays to 1 because we do manual waits
6513 * on them. For T8, even BSpec recommends doing it. For T9, if we
6514 * don't do this, we'll end up waiting for the backlight off delay
6515 * twice: once when we do the manual sleep, and once when we disable
6516 * the panel and wait for the PP_STATUS bit to become zero.
6517 */
6518 final->t8 = 1;
6519 final->t9 = 1;
6520
6521 /*
6522 * HW has only a 100msec granularity for t11_t12 so round it up
6523 * accordingly.
6524 */
6525 final->t11_t12 = roundup(final->t11_t12, 100 * 10);
6526}
6527
6528static void
6529intel_dp_init_panel_power_sequencer_registers(struct intel_dp *intel_dp,
6530 bool force_disable_vdd)
6531{
6532 struct drm_i915_private *dev_priv = dp_to_i915(intel_dp);
6533 u32 pp_on, pp_off, port_sel = 0;
6534 int div = dev_priv->rawclk_freq / 1000;
6535 struct pps_registers regs;
6536 enum port port = dp_to_dig_port(intel_dp)->base.port;
6537 const struct edp_power_seq *seq = &intel_dp->pps_delays;
6538
6539 lockdep_assert_held(&dev_priv->pps_mutex);
6540
6541 intel_pps_get_registers(intel_dp, ®s);
6542
6543 /*
6544 * On some VLV machines the BIOS can leave the VDD
6545 * enabled even on power sequencers which aren't
6546 * hooked up to any port. This would mess up the
6547 * power domain tracking the first time we pick
6548 * one of these power sequencers for use since
6549 * edp_panel_vdd_on() would notice that the VDD was
6550 * already on and therefore wouldn't grab the power
6551 * domain reference. Disable VDD first to avoid this.
6552 * This also avoids spuriously turning the VDD on as
6553 * soon as the new power sequencer gets initialized.
6554 */
6555 if (force_disable_vdd) {
6556 u32 pp = ironlake_get_pp_control(intel_dp);
6557
6558 WARN(pp & PANEL_POWER_ON, "Panel power already on\n");
6559
6560 if (pp & EDP_FORCE_VDD)
6561 DRM_DEBUG_KMS("VDD already on, disabling first\n");
6562
6563 pp &= ~EDP_FORCE_VDD;
6564
6565 I915_WRITE(regs.pp_ctrl, pp);
6566 }
6567
6568 pp_on = REG_FIELD_PREP(PANEL_POWER_UP_DELAY_MASK, seq->t1_t3) |
6569 REG_FIELD_PREP(PANEL_LIGHT_ON_DELAY_MASK, seq->t8);
6570 pp_off = REG_FIELD_PREP(PANEL_LIGHT_OFF_DELAY_MASK, seq->t9) |
6571 REG_FIELD_PREP(PANEL_POWER_DOWN_DELAY_MASK, seq->t10);
6572
6573 /* Haswell doesn't have any port selection bits for the panel
6574 * power sequencer any more. */
6575 if (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv)) {
6576 port_sel = PANEL_PORT_SELECT_VLV(port);
6577 } else if (HAS_PCH_IBX(dev_priv) || HAS_PCH_CPT(dev_priv)) {
6578 switch (port) {
6579 case PORT_A:
6580 port_sel = PANEL_PORT_SELECT_DPA;
6581 break;
6582 case PORT_C:
6583 port_sel = PANEL_PORT_SELECT_DPC;
6584 break;
6585 case PORT_D:
6586 port_sel = PANEL_PORT_SELECT_DPD;
6587 break;
6588 default:
6589 MISSING_CASE(port);
6590 break;
6591 }
6592 }
6593
6594 pp_on |= port_sel;
6595
6596 I915_WRITE(regs.pp_on, pp_on);
6597 I915_WRITE(regs.pp_off, pp_off);
6598
6599 /*
6600 * Compute the divisor for the pp clock, simply match the Bspec formula.
6601 */
6602 if (i915_mmio_reg_valid(regs.pp_div)) {
6603 I915_WRITE(regs.pp_div,
6604 REG_FIELD_PREP(PP_REFERENCE_DIVIDER_MASK, (100 * div) / 2 - 1) |
6605 REG_FIELD_PREP(PANEL_POWER_CYCLE_DELAY_MASK, DIV_ROUND_UP(seq->t11_t12, 1000)));
6606 } else {
6607 u32 pp_ctl;
6608
6609 pp_ctl = I915_READ(regs.pp_ctrl);
6610 pp_ctl &= ~BXT_POWER_CYCLE_DELAY_MASK;
6611 pp_ctl |= REG_FIELD_PREP(BXT_POWER_CYCLE_DELAY_MASK, DIV_ROUND_UP(seq->t11_t12, 1000));
6612 I915_WRITE(regs.pp_ctrl, pp_ctl);
6613 }
6614
6615 DRM_DEBUG_KMS("panel power sequencer register settings: PP_ON %#x, PP_OFF %#x, PP_DIV %#x\n",
6616 I915_READ(regs.pp_on),
6617 I915_READ(regs.pp_off),
6618 i915_mmio_reg_valid(regs.pp_div) ?
6619 I915_READ(regs.pp_div) :
6620 (I915_READ(regs.pp_ctrl) & BXT_POWER_CYCLE_DELAY_MASK));
6621}
6622
6623static void intel_dp_pps_init(struct intel_dp *intel_dp)
6624{
6625 struct drm_i915_private *dev_priv = dp_to_i915(intel_dp);
6626
6627 if (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv)) {
6628 vlv_initial_power_sequencer_setup(intel_dp);
6629 } else {
6630 intel_dp_init_panel_power_sequencer(intel_dp);
6631 intel_dp_init_panel_power_sequencer_registers(intel_dp, false);
6632 }
6633}
6634
6635/**
6636 * intel_dp_set_drrs_state - program registers for RR switch to take effect
6637 * @dev_priv: i915 device
6638 * @crtc_state: a pointer to the active intel_crtc_state
6639 * @refresh_rate: RR to be programmed
6640 *
6641 * This function gets called when refresh rate (RR) has to be changed from
6642 * one frequency to another. Switches can be between high and low RR
6643 * supported by the panel or to any other RR based on media playback (in
6644 * this case, RR value needs to be passed from user space).
6645 *
6646 * The caller of this function needs to take a lock on dev_priv->drrs.
6647 */
6648static void intel_dp_set_drrs_state(struct drm_i915_private *dev_priv,
6649 const struct intel_crtc_state *crtc_state,
6650 int refresh_rate)
6651{
6652 struct intel_dp *intel_dp = dev_priv->drrs.dp;
6653 struct intel_crtc *intel_crtc = to_intel_crtc(crtc_state->base.crtc);
6654 enum drrs_refresh_rate_type index = DRRS_HIGH_RR;
6655
6656 if (refresh_rate <= 0) {
6657 DRM_DEBUG_KMS("Refresh rate should be positive non-zero.\n");
6658 return;
6659 }
6660
6661 if (intel_dp == NULL) {
6662 DRM_DEBUG_KMS("DRRS not supported.\n");
6663 return;
6664 }
6665
6666 if (!intel_crtc) {
6667 DRM_DEBUG_KMS("DRRS: intel_crtc not initialized\n");
6668 return;
6669 }
6670
6671 if (dev_priv->drrs.type < SEAMLESS_DRRS_SUPPORT) {
6672 DRM_DEBUG_KMS("Only Seamless DRRS supported.\n");
6673 return;
6674 }
6675
6676 if (intel_dp->attached_connector->panel.downclock_mode->vrefresh ==
6677 refresh_rate)
6678 index = DRRS_LOW_RR;
6679
6680 if (index == dev_priv->drrs.refresh_rate_type) {
6681 DRM_DEBUG_KMS(
6682 "DRRS requested for previously set RR...ignoring\n");
6683 return;
6684 }
6685
6686 if (!crtc_state->base.active) {
6687 DRM_DEBUG_KMS("eDP encoder disabled. CRTC not Active\n");
6688 return;
6689 }
6690
6691 if (INTEL_GEN(dev_priv) >= 8 && !IS_CHERRYVIEW(dev_priv)) {
6692 switch (index) {
6693 case DRRS_HIGH_RR:
6694 intel_dp_set_m_n(crtc_state, M1_N1);
6695 break;
6696 case DRRS_LOW_RR:
6697 intel_dp_set_m_n(crtc_state, M2_N2);
6698 break;
6699 case DRRS_MAX_RR:
6700 default:
6701 DRM_ERROR("Unsupported refreshrate type\n");
6702 }
6703 } else if (INTEL_GEN(dev_priv) > 6) {
6704 i915_reg_t reg = PIPECONF(crtc_state->cpu_transcoder);
6705 u32 val;
6706
6707 val = I915_READ(reg);
6708 if (index > DRRS_HIGH_RR) {
6709 if (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv))
6710 val |= PIPECONF_EDP_RR_MODE_SWITCH_VLV;
6711 else
6712 val |= PIPECONF_EDP_RR_MODE_SWITCH;
6713 } else {
6714 if (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv))
6715 val &= ~PIPECONF_EDP_RR_MODE_SWITCH_VLV;
6716 else
6717 val &= ~PIPECONF_EDP_RR_MODE_SWITCH;
6718 }
6719 I915_WRITE(reg, val);
6720 }
6721
6722 dev_priv->drrs.refresh_rate_type = index;
6723
6724 DRM_DEBUG_KMS("eDP Refresh Rate set to : %dHz\n", refresh_rate);
6725}
6726
6727/**
6728 * intel_edp_drrs_enable - init drrs struct if supported
6729 * @intel_dp: DP struct
6730 * @crtc_state: A pointer to the active crtc state.
6731 *
6732 * Initializes frontbuffer_bits and drrs.dp
6733 */
6734void intel_edp_drrs_enable(struct intel_dp *intel_dp,
6735 const struct intel_crtc_state *crtc_state)
6736{
6737 struct drm_i915_private *dev_priv = dp_to_i915(intel_dp);
6738
6739 if (!crtc_state->has_drrs) {
6740 DRM_DEBUG_KMS("Panel doesn't support DRRS\n");
6741 return;
6742 }
6743
6744 if (dev_priv->psr.enabled) {
6745 DRM_DEBUG_KMS("PSR enabled. Not enabling DRRS.\n");
6746 return;
6747 }
6748
6749 mutex_lock(&dev_priv->drrs.mutex);
6750 if (dev_priv->drrs.dp) {
6751 DRM_DEBUG_KMS("DRRS already enabled\n");
6752 goto unlock;
6753 }
6754
6755 dev_priv->drrs.busy_frontbuffer_bits = 0;
6756
6757 dev_priv->drrs.dp = intel_dp;
6758
6759unlock:
6760 mutex_unlock(&dev_priv->drrs.mutex);
6761}
6762
6763/**
6764 * intel_edp_drrs_disable - Disable DRRS
6765 * @intel_dp: DP struct
6766 * @old_crtc_state: Pointer to old crtc_state.
6767 *
6768 */
6769void intel_edp_drrs_disable(struct intel_dp *intel_dp,
6770 const struct intel_crtc_state *old_crtc_state)
6771{
6772 struct drm_i915_private *dev_priv = dp_to_i915(intel_dp);
6773
6774 if (!old_crtc_state->has_drrs)
6775 return;
6776
6777 mutex_lock(&dev_priv->drrs.mutex);
6778 if (!dev_priv->drrs.dp) {
6779 mutex_unlock(&dev_priv->drrs.mutex);
6780 return;
6781 }
6782
6783 if (dev_priv->drrs.refresh_rate_type == DRRS_LOW_RR)
6784 intel_dp_set_drrs_state(dev_priv, old_crtc_state,
6785 intel_dp->attached_connector->panel.fixed_mode->vrefresh);
6786
6787 dev_priv->drrs.dp = NULL;
6788 mutex_unlock(&dev_priv->drrs.mutex);
6789
6790 cancel_delayed_work_sync(&dev_priv->drrs.work);
6791}
6792
6793static void intel_edp_drrs_downclock_work(struct work_struct *work)
6794{
6795 struct drm_i915_private *dev_priv =
6796 container_of(work, typeof(*dev_priv), drrs.work.work);
6797 struct intel_dp *intel_dp;
6798
6799 mutex_lock(&dev_priv->drrs.mutex);
6800
6801 intel_dp = dev_priv->drrs.dp;
6802
6803 if (!intel_dp)
6804 goto unlock;
6805
6806 /*
6807 * The delayed work can race with an invalidate hence we need to
6808 * recheck.
6809 */
6810
6811 if (dev_priv->drrs.busy_frontbuffer_bits)
6812 goto unlock;
6813
6814 if (dev_priv->drrs.refresh_rate_type != DRRS_LOW_RR) {
6815 struct drm_crtc *crtc = dp_to_dig_port(intel_dp)->base.base.crtc;
6816
6817 intel_dp_set_drrs_state(dev_priv, to_intel_crtc(crtc)->config,
6818 intel_dp->attached_connector->panel.downclock_mode->vrefresh);
6819 }
6820
6821unlock:
6822 mutex_unlock(&dev_priv->drrs.mutex);
6823}
6824
6825/**
6826 * intel_edp_drrs_invalidate - Disable Idleness DRRS
6827 * @dev_priv: i915 device
6828 * @frontbuffer_bits: frontbuffer plane tracking bits
6829 *
6830 * This function gets called everytime rendering on the given planes start.
6831 * Hence DRRS needs to be Upclocked, i.e. (LOW_RR -> HIGH_RR).
6832 *
6833 * Dirty frontbuffers relevant to DRRS are tracked in busy_frontbuffer_bits.
6834 */
6835void intel_edp_drrs_invalidate(struct drm_i915_private *dev_priv,
6836 unsigned int frontbuffer_bits)
6837{
6838 struct drm_crtc *crtc;
6839 enum pipe pipe;
6840
6841 if (dev_priv->drrs.type == DRRS_NOT_SUPPORTED)
6842 return;
6843
6844 cancel_delayed_work(&dev_priv->drrs.work);
6845
6846 mutex_lock(&dev_priv->drrs.mutex);
6847 if (!dev_priv->drrs.dp) {
6848 mutex_unlock(&dev_priv->drrs.mutex);
6849 return;
6850 }
6851
6852 crtc = dp_to_dig_port(dev_priv->drrs.dp)->base.base.crtc;
6853 pipe = to_intel_crtc(crtc)->pipe;
6854
6855 frontbuffer_bits &= INTEL_FRONTBUFFER_ALL_MASK(pipe);
6856 dev_priv->drrs.busy_frontbuffer_bits |= frontbuffer_bits;
6857
6858 /* invalidate means busy screen hence upclock */
6859 if (frontbuffer_bits && dev_priv->drrs.refresh_rate_type == DRRS_LOW_RR)
6860 intel_dp_set_drrs_state(dev_priv, to_intel_crtc(crtc)->config,
6861 dev_priv->drrs.dp->attached_connector->panel.fixed_mode->vrefresh);
6862
6863 mutex_unlock(&dev_priv->drrs.mutex);
6864}
6865
6866/**
6867 * intel_edp_drrs_flush - Restart Idleness DRRS
6868 * @dev_priv: i915 device
6869 * @frontbuffer_bits: frontbuffer plane tracking bits
6870 *
6871 * This function gets called every time rendering on the given planes has
6872 * completed or flip on a crtc is completed. So DRRS should be upclocked
6873 * (LOW_RR -> HIGH_RR). And also Idleness detection should be started again,
6874 * if no other planes are dirty.
6875 *
6876 * Dirty frontbuffers relevant to DRRS are tracked in busy_frontbuffer_bits.
6877 */
6878void intel_edp_drrs_flush(struct drm_i915_private *dev_priv,
6879 unsigned int frontbuffer_bits)
6880{
6881 struct drm_crtc *crtc;
6882 enum pipe pipe;
6883
6884 if (dev_priv->drrs.type == DRRS_NOT_SUPPORTED)
6885 return;
6886
6887 cancel_delayed_work(&dev_priv->drrs.work);
6888
6889 mutex_lock(&dev_priv->drrs.mutex);
6890 if (!dev_priv->drrs.dp) {
6891 mutex_unlock(&dev_priv->drrs.mutex);
6892 return;
6893 }
6894
6895 crtc = dp_to_dig_port(dev_priv->drrs.dp)->base.base.crtc;
6896 pipe = to_intel_crtc(crtc)->pipe;
6897
6898 frontbuffer_bits &= INTEL_FRONTBUFFER_ALL_MASK(pipe);
6899 dev_priv->drrs.busy_frontbuffer_bits &= ~frontbuffer_bits;
6900
6901 /* flush means busy screen hence upclock */
6902 if (frontbuffer_bits && dev_priv->drrs.refresh_rate_type == DRRS_LOW_RR)
6903 intel_dp_set_drrs_state(dev_priv, to_intel_crtc(crtc)->config,
6904 dev_priv->drrs.dp->attached_connector->panel.fixed_mode->vrefresh);
6905
6906 /*
6907 * flush also means no more activity hence schedule downclock, if all
6908 * other fbs are quiescent too
6909 */
6910 if (!dev_priv->drrs.busy_frontbuffer_bits)
6911 schedule_delayed_work(&dev_priv->drrs.work,
6912 msecs_to_jiffies(1000));
6913 mutex_unlock(&dev_priv->drrs.mutex);
6914}
6915
6916/**
6917 * DOC: Display Refresh Rate Switching (DRRS)
6918 *
6919 * Display Refresh Rate Switching (DRRS) is a power conservation feature
6920 * which enables swtching between low and high refresh rates,
6921 * dynamically, based on the usage scenario. This feature is applicable
6922 * for internal panels.
6923 *
6924 * Indication that the panel supports DRRS is given by the panel EDID, which
6925 * would list multiple refresh rates for one resolution.
6926 *
6927 * DRRS is of 2 types - static and seamless.
6928 * Static DRRS involves changing refresh rate (RR) by doing a full modeset
6929 * (may appear as a blink on screen) and is used in dock-undock scenario.
6930 * Seamless DRRS involves changing RR without any visual effect to the user
6931 * and can be used during normal system usage. This is done by programming
6932 * certain registers.
6933 *
6934 * Support for static/seamless DRRS may be indicated in the VBT based on
6935 * inputs from the panel spec.
6936 *
6937 * DRRS saves power by switching to low RR based on usage scenarios.
6938 *
6939 * The implementation is based on frontbuffer tracking implementation. When
6940 * there is a disturbance on the screen triggered by user activity or a periodic
6941 * system activity, DRRS is disabled (RR is changed to high RR). When there is
6942 * no movement on screen, after a timeout of 1 second, a switch to low RR is
6943 * made.
6944 *
6945 * For integration with frontbuffer tracking code, intel_edp_drrs_invalidate()
6946 * and intel_edp_drrs_flush() are called.
6947 *
6948 * DRRS can be further extended to support other internal panels and also
6949 * the scenario of video playback wherein RR is set based on the rate
6950 * requested by userspace.
6951 */
6952
6953/**
6954 * intel_dp_drrs_init - Init basic DRRS work and mutex.
6955 * @connector: eDP connector
6956 * @fixed_mode: preferred mode of panel
6957 *
6958 * This function is called only once at driver load to initialize basic
6959 * DRRS stuff.
6960 *
6961 * Returns:
6962 * Downclock mode if panel supports it, else return NULL.
6963 * DRRS support is determined by the presence of downclock mode (apart
6964 * from VBT setting).
6965 */
6966static struct drm_display_mode *
6967intel_dp_drrs_init(struct intel_connector *connector,
6968 struct drm_display_mode *fixed_mode)
6969{
6970 struct drm_i915_private *dev_priv = to_i915(connector->base.dev);
6971 struct drm_display_mode *downclock_mode = NULL;
6972
6973 INIT_DELAYED_WORK(&dev_priv->drrs.work, intel_edp_drrs_downclock_work);
6974 mutex_init(&dev_priv->drrs.mutex);
6975
6976 if (INTEL_GEN(dev_priv) <= 6) {
6977 DRM_DEBUG_KMS("DRRS supported for Gen7 and above\n");
6978 return NULL;
6979 }
6980
6981 if (dev_priv->vbt.drrs_type != SEAMLESS_DRRS_SUPPORT) {
6982 DRM_DEBUG_KMS("VBT doesn't support DRRS\n");
6983 return NULL;
6984 }
6985
6986 downclock_mode = intel_panel_edid_downclock_mode(connector, fixed_mode);
6987 if (!downclock_mode) {
6988 DRM_DEBUG_KMS("Downclock mode is not found. DRRS not supported\n");
6989 return NULL;
6990 }
6991
6992 dev_priv->drrs.type = dev_priv->vbt.drrs_type;
6993
6994 dev_priv->drrs.refresh_rate_type = DRRS_HIGH_RR;
6995 DRM_DEBUG_KMS("seamless DRRS supported for eDP panel.\n");
6996 return downclock_mode;
6997}
6998
6999static bool intel_edp_init_connector(struct intel_dp *intel_dp,
7000 struct intel_connector *intel_connector)
7001{
7002 struct drm_i915_private *dev_priv = dp_to_i915(intel_dp);
7003 struct drm_device *dev = &dev_priv->drm;
7004 struct drm_connector *connector = &intel_connector->base;
7005 struct drm_display_mode *fixed_mode = NULL;
7006 struct drm_display_mode *downclock_mode = NULL;
7007 bool has_dpcd;
7008 enum pipe pipe = INVALID_PIPE;
7009 intel_wakeref_t wakeref;
7010 struct edid *edid;
7011
7012 if (!intel_dp_is_edp(intel_dp))
7013 return true;
7014
7015 INIT_DELAYED_WORK(&intel_dp->panel_vdd_work, edp_panel_vdd_work);
7016
7017 /*
7018 * On IBX/CPT we may get here with LVDS already registered. Since the
7019 * driver uses the only internal power sequencer available for both
7020 * eDP and LVDS bail out early in this case to prevent interfering
7021 * with an already powered-on LVDS power sequencer.
7022 */
7023 if (intel_get_lvds_encoder(dev_priv)) {
7024 WARN_ON(!(HAS_PCH_IBX(dev_priv) || HAS_PCH_CPT(dev_priv)));
7025 DRM_INFO("LVDS was detected, not registering eDP\n");
7026
7027 return false;
7028 }
7029
7030 with_pps_lock(intel_dp, wakeref) {
7031 intel_dp_init_panel_power_timestamps(intel_dp);
7032 intel_dp_pps_init(intel_dp);
7033 intel_edp_panel_vdd_sanitize(intel_dp);
7034 }
7035
7036 /* Cache DPCD and EDID for edp. */
7037 has_dpcd = intel_edp_init_dpcd(intel_dp);
7038
7039 if (!has_dpcd) {
7040 /* if this fails, presume the device is a ghost */
7041 DRM_INFO("failed to retrieve link info, disabling eDP\n");
7042 goto out_vdd_off;
7043 }
7044
7045 mutex_lock(&dev->mode_config.mutex);
7046 edid = drm_get_edid(connector, &intel_dp->aux.ddc);
7047 if (edid) {
7048 if (drm_add_edid_modes(connector, edid)) {
7049 drm_connector_update_edid_property(connector,
7050 edid);
7051 } else {
7052 kfree(edid);
7053 edid = ERR_PTR(-EINVAL);
7054 }
7055 } else {
7056 edid = ERR_PTR(-ENOENT);
7057 }
7058 intel_connector->edid = edid;
7059
7060 fixed_mode = intel_panel_edid_fixed_mode(intel_connector);
7061 if (fixed_mode)
7062 downclock_mode = intel_dp_drrs_init(intel_connector, fixed_mode);
7063
7064 /* fallback to VBT if available for eDP */
7065 if (!fixed_mode)
7066 fixed_mode = intel_panel_vbt_fixed_mode(intel_connector);
7067 mutex_unlock(&dev->mode_config.mutex);
7068
7069 if (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv)) {
7070 intel_dp->edp_notifier.notifier_call = edp_notify_handler;
7071 register_reboot_notifier(&intel_dp->edp_notifier);
7072
7073 /*
7074 * Figure out the current pipe for the initial backlight setup.
7075 * If the current pipe isn't valid, try the PPS pipe, and if that
7076 * fails just assume pipe A.
7077 */
7078 pipe = vlv_active_pipe(intel_dp);
7079
7080 if (pipe != PIPE_A && pipe != PIPE_B)
7081 pipe = intel_dp->pps_pipe;
7082
7083 if (pipe != PIPE_A && pipe != PIPE_B)
7084 pipe = PIPE_A;
7085
7086 DRM_DEBUG_KMS("using pipe %c for initial backlight setup\n",
7087 pipe_name(pipe));
7088 }
7089
7090 intel_panel_init(&intel_connector->panel, fixed_mode, downclock_mode);
7091 intel_connector->panel.backlight.power = intel_edp_backlight_power;
7092 intel_panel_setup_backlight(connector, pipe);
7093
7094 if (fixed_mode)
7095 drm_connector_init_panel_orientation_property(
7096 connector, fixed_mode->hdisplay, fixed_mode->vdisplay);
7097
7098 return true;
7099
7100out_vdd_off:
7101 cancel_delayed_work_sync(&intel_dp->panel_vdd_work);
7102 /*
7103 * vdd might still be enabled do to the delayed vdd off.
7104 * Make sure vdd is actually turned off here.
7105 */
7106 with_pps_lock(intel_dp, wakeref)
7107 edp_panel_vdd_off_sync(intel_dp);
7108
7109 return false;
7110}
7111
7112static void intel_dp_modeset_retry_work_fn(struct work_struct *work)
7113{
7114 struct intel_connector *intel_connector;
7115 struct drm_connector *connector;
7116
7117 intel_connector = container_of(work, typeof(*intel_connector),
7118 modeset_retry_work);
7119 connector = &intel_connector->base;
7120 DRM_DEBUG_KMS("[CONNECTOR:%d:%s]\n", connector->base.id,
7121 connector->name);
7122
7123 /* Grab the locks before changing connector property*/
7124 mutex_lock(&connector->dev->mode_config.mutex);
7125 /* Set connector link status to BAD and send a Uevent to notify
7126 * userspace to do a modeset.
7127 */
7128 drm_connector_set_link_status_property(connector,
7129 DRM_MODE_LINK_STATUS_BAD);
7130 mutex_unlock(&connector->dev->mode_config.mutex);
7131 /* Send Hotplug uevent so userspace can reprobe */
7132 drm_kms_helper_hotplug_event(connector->dev);
7133}
7134
7135bool
7136intel_dp_init_connector(struct intel_digital_port *intel_dig_port,
7137 struct intel_connector *intel_connector)
7138{
7139 struct drm_connector *connector = &intel_connector->base;
7140 struct intel_dp *intel_dp = &intel_dig_port->dp;
7141 struct intel_encoder *intel_encoder = &intel_dig_port->base;
7142 struct drm_device *dev = intel_encoder->base.dev;
7143 struct drm_i915_private *dev_priv = to_i915(dev);
7144 enum port port = intel_encoder->port;
7145 enum phy phy = intel_port_to_phy(dev_priv, port);
7146 int type;
7147
7148 /* Initialize the work for modeset in case of link train failure */
7149 INIT_WORK(&intel_connector->modeset_retry_work,
7150 intel_dp_modeset_retry_work_fn);
7151
7152 if (WARN(intel_dig_port->max_lanes < 1,
7153 "Not enough lanes (%d) for DP on port %c\n",
7154 intel_dig_port->max_lanes, port_name(port)))
7155 return false;
7156
7157 intel_dp_set_source_rates(intel_dp);
7158
7159 intel_dp->reset_link_params = true;
7160 intel_dp->pps_pipe = INVALID_PIPE;
7161 intel_dp->active_pipe = INVALID_PIPE;
7162
7163 /* Preserve the current hw state. */
7164 intel_dp->DP = I915_READ(intel_dp->output_reg);
7165 intel_dp->attached_connector = intel_connector;
7166
7167 if (intel_dp_is_port_edp(dev_priv, port)) {
7168 /*
7169 * Currently we don't support eDP on TypeC ports, although in
7170 * theory it could work on TypeC legacy ports.
7171 */
7172 WARN_ON(intel_phy_is_tc(dev_priv, phy));
7173 type = DRM_MODE_CONNECTOR_eDP;
7174 } else {
7175 type = DRM_MODE_CONNECTOR_DisplayPort;
7176 }
7177
7178 if (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv))
7179 intel_dp->active_pipe = vlv_active_pipe(intel_dp);
7180
7181 /*
7182 * For eDP we always set the encoder type to INTEL_OUTPUT_EDP, but
7183 * for DP the encoder type can be set by the caller to
7184 * INTEL_OUTPUT_UNKNOWN for DDI, so don't rewrite it.
7185 */
7186 if (type == DRM_MODE_CONNECTOR_eDP)
7187 intel_encoder->type = INTEL_OUTPUT_EDP;
7188
7189 /* eDP only on port B and/or C on vlv/chv */
7190 if (WARN_ON((IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv)) &&
7191 intel_dp_is_edp(intel_dp) &&
7192 port != PORT_B && port != PORT_C))
7193 return false;
7194
7195 DRM_DEBUG_KMS("Adding %s connector on port %c\n",
7196 type == DRM_MODE_CONNECTOR_eDP ? "eDP" : "DP",
7197 port_name(port));
7198
7199 drm_connector_init(dev, connector, &intel_dp_connector_funcs, type);
7200 drm_connector_helper_add(connector, &intel_dp_connector_helper_funcs);
7201
7202 if (!HAS_GMCH(dev_priv))
7203 connector->interlace_allowed = true;
7204 connector->doublescan_allowed = 0;
7205
7206 if (INTEL_GEN(dev_priv) >= 11)
7207 connector->ycbcr_420_allowed = true;
7208
7209 intel_encoder->hpd_pin = intel_hpd_pin_default(dev_priv, port);
7210
7211 intel_dp_aux_init(intel_dp);
7212
7213 intel_connector_attach_encoder(intel_connector, intel_encoder);
7214
7215 if (HAS_DDI(dev_priv))
7216 intel_connector->get_hw_state = intel_ddi_connector_get_hw_state;
7217 else
7218 intel_connector->get_hw_state = intel_connector_get_hw_state;
7219
7220 /* init MST on ports that can support it */
7221 if (HAS_DP_MST(dev_priv) && !intel_dp_is_edp(intel_dp) &&
7222 (port == PORT_B || port == PORT_C ||
7223 port == PORT_D || port == PORT_F))
7224 intel_dp_mst_encoder_init(intel_dig_port,
7225 intel_connector->base.base.id);
7226
7227 if (!intel_edp_init_connector(intel_dp, intel_connector)) {
7228 intel_dp_aux_fini(intel_dp);
7229 intel_dp_mst_encoder_cleanup(intel_dig_port);
7230 goto fail;
7231 }
7232
7233 intel_dp_add_properties(intel_dp, connector);
7234
7235 if (is_hdcp_supported(dev_priv, port) && !intel_dp_is_edp(intel_dp)) {
7236 int ret = intel_hdcp_init(intel_connector, &intel_dp_hdcp_shim);
7237 if (ret)
7238 DRM_DEBUG_KMS("HDCP init failed, skipping.\n");
7239 }
7240
7241 /* For G4X desktop chip, PEG_BAND_GAP_DATA 3:0 must first be written
7242 * 0xd. Failure to do so will result in spurious interrupts being
7243 * generated on the port when a cable is not attached.
7244 */
7245 if (IS_G45(dev_priv)) {
7246 u32 temp = I915_READ(PEG_BAND_GAP_DATA);
7247 I915_WRITE(PEG_BAND_GAP_DATA, (temp & ~0xf) | 0xd);
7248 }
7249
7250 return true;
7251
7252fail:
7253 drm_connector_cleanup(connector);
7254
7255 return false;
7256}
7257
7258bool intel_dp_init(struct drm_i915_private *dev_priv,
7259 i915_reg_t output_reg,
7260 enum port port)
7261{
7262 struct intel_digital_port *intel_dig_port;
7263 struct intel_encoder *intel_encoder;
7264 struct drm_encoder *encoder;
7265 struct intel_connector *intel_connector;
7266
7267 intel_dig_port = kzalloc(sizeof(*intel_dig_port), GFP_KERNEL);
7268 if (!intel_dig_port)
7269 return false;
7270
7271 intel_connector = intel_connector_alloc();
7272 if (!intel_connector)
7273 goto err_connector_alloc;
7274
7275 intel_encoder = &intel_dig_port->base;
7276 encoder = &intel_encoder->base;
7277
7278 if (drm_encoder_init(&dev_priv->drm, &intel_encoder->base,
7279 &intel_dp_enc_funcs, DRM_MODE_ENCODER_TMDS,
7280 "DP %c", port_name(port)))
7281 goto err_encoder_init;
7282
7283 intel_encoder->hotplug = intel_dp_hotplug;
7284 intel_encoder->compute_config = intel_dp_compute_config;
7285 intel_encoder->get_hw_state = intel_dp_get_hw_state;
7286 intel_encoder->get_config = intel_dp_get_config;
7287 intel_encoder->update_pipe = intel_panel_update_backlight;
7288 intel_encoder->suspend = intel_dp_encoder_suspend;
7289 if (IS_CHERRYVIEW(dev_priv)) {
7290 intel_encoder->pre_pll_enable = chv_dp_pre_pll_enable;
7291 intel_encoder->pre_enable = chv_pre_enable_dp;
7292 intel_encoder->enable = vlv_enable_dp;
7293 intel_encoder->disable = vlv_disable_dp;
7294 intel_encoder->post_disable = chv_post_disable_dp;
7295 intel_encoder->post_pll_disable = chv_dp_post_pll_disable;
7296 } else if (IS_VALLEYVIEW(dev_priv)) {
7297 intel_encoder->pre_pll_enable = vlv_dp_pre_pll_enable;
7298 intel_encoder->pre_enable = vlv_pre_enable_dp;
7299 intel_encoder->enable = vlv_enable_dp;
7300 intel_encoder->disable = vlv_disable_dp;
7301 intel_encoder->post_disable = vlv_post_disable_dp;
7302 } else {
7303 intel_encoder->pre_enable = g4x_pre_enable_dp;
7304 intel_encoder->enable = g4x_enable_dp;
7305 intel_encoder->disable = g4x_disable_dp;
7306 intel_encoder->post_disable = g4x_post_disable_dp;
7307 }
7308
7309 intel_dig_port->dp.output_reg = output_reg;
7310 intel_dig_port->max_lanes = 4;
7311
7312 intel_encoder->type = INTEL_OUTPUT_DP;
7313 intel_encoder->power_domain = intel_port_to_power_domain(port);
7314 if (IS_CHERRYVIEW(dev_priv)) {
7315 if (port == PORT_D)
7316 intel_encoder->crtc_mask = 1 << 2;
7317 else
7318 intel_encoder->crtc_mask = (1 << 0) | (1 << 1);
7319 } else {
7320 intel_encoder->crtc_mask = (1 << 0) | (1 << 1) | (1 << 2);
7321 }
7322 intel_encoder->cloneable = 0;
7323 intel_encoder->port = port;
7324
7325 intel_dig_port->hpd_pulse = intel_dp_hpd_pulse;
7326
7327 if (port != PORT_A)
7328 intel_infoframe_init(intel_dig_port);
7329
7330 intel_dig_port->aux_ch = intel_bios_port_aux_ch(dev_priv, port);
7331 if (!intel_dp_init_connector(intel_dig_port, intel_connector))
7332 goto err_init_connector;
7333
7334 return true;
7335
7336err_init_connector:
7337 drm_encoder_cleanup(encoder);
7338err_encoder_init:
7339 kfree(intel_connector);
7340err_connector_alloc:
7341 kfree(intel_dig_port);
7342 return false;
7343}
7344
7345void intel_dp_mst_suspend(struct drm_i915_private *dev_priv)
7346{
7347 struct intel_encoder *encoder;
7348
7349 for_each_intel_encoder(&dev_priv->drm, encoder) {
7350 struct intel_dp *intel_dp;
7351
7352 if (encoder->type != INTEL_OUTPUT_DDI)
7353 continue;
7354
7355 intel_dp = enc_to_intel_dp(&encoder->base);
7356
7357 if (!intel_dp->can_mst)
7358 continue;
7359
7360 if (intel_dp->is_mst)
7361 drm_dp_mst_topology_mgr_suspend(&intel_dp->mst_mgr);
7362 }
7363}
7364
7365void intel_dp_mst_resume(struct drm_i915_private *dev_priv)
7366{
7367 struct intel_encoder *encoder;
7368
7369 for_each_intel_encoder(&dev_priv->drm, encoder) {
7370 struct intel_dp *intel_dp;
7371 int ret;
7372
7373 if (encoder->type != INTEL_OUTPUT_DDI)
7374 continue;
7375
7376 intel_dp = enc_to_intel_dp(&encoder->base);
7377
7378 if (!intel_dp->can_mst)
7379 continue;
7380
7381 ret = drm_dp_mst_topology_mgr_resume(&intel_dp->mst_mgr);
7382 if (ret) {
7383 intel_dp->is_mst = false;
7384 drm_dp_mst_topology_mgr_set_mst(&intel_dp->mst_mgr,
7385 false);
7386 }
7387 }
7388}