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drm/i915: Create intel_dp->prepare_link_retrain() hook
[mirror_ubuntu-zesty-kernel.git] / drivers / gpu / drm / i915 / intel_dp.c
CommitLineData
a4fc5ed6
KP		 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/i2c.h>
5a0e3ad6 29#include <linux/slab.h>
2d1a8a48 30#include <linux/export.h>
01527b31
CT		 31#include <linux/notifier.h>
32#include <linux/reboot.h>
760285e7 33#include <drm/drmP.h>
c6f95f27 34#include <drm/drm_atomic_helper.h>
760285e7
DH		 35#include <drm/drm_crtc.h>
36#include <drm/drm_crtc_helper.h>
37#include <drm/drm_edid.h>
a4fc5ed6 38#include "intel_drv.h"
760285e7 39#include <drm/i915_drm.h>
a4fc5ed6 40#include "i915_drv.h"
a4fc5ed6 41
a4fc5ed6
KP		 42#define DP_LINK_CHECK_TIMEOUT (10 * 1000)
43
559be30c
TP		 44/* Compliance test status bits */
45#define INTEL_DP_RESOLUTION_SHIFT_MASK 0
46#define INTEL_DP_RESOLUTION_PREFERRED (1 << INTEL_DP_RESOLUTION_SHIFT_MASK)
47#define INTEL_DP_RESOLUTION_STANDARD (2 << INTEL_DP_RESOLUTION_SHIFT_MASK)
48#define INTEL_DP_RESOLUTION_FAILSAFE (3 << INTEL_DP_RESOLUTION_SHIFT_MASK)
49
9dd4ffdf 50struct dp_link_dpll {
840b32b7 51 int clock;
9dd4ffdf
CML		 52 struct dpll dpll;
53};
54
55static const struct dp_link_dpll gen4_dpll[] = {
840b32b7 56 { 162000,
9dd4ffdf 57 { .p1 = 2, .p2 = 10, .n = 2, .m1 = 23, .m2 = 8 } },
840b32b7 58 { 270000,
9dd4ffdf
CML		 59 { .p1 = 1, .p2 = 10, .n = 1, .m1 = 14, .m2 = 2 } }
60};
61
62static const struct dp_link_dpll pch_dpll[] = {
840b32b7 63 { 162000,
9dd4ffdf 64 { .p1 = 2, .p2 = 10, .n = 1, .m1 = 12, .m2 = 9 } },
840b32b7 65 { 270000,
9dd4ffdf
CML		 66 { .p1 = 1, .p2 = 10, .n = 2, .m1 = 14, .m2 = 8 } }
67};
68
65ce4bf5 69static const struct dp_link_dpll vlv_dpll[] = {
840b32b7 70 { 162000,
58f6e632 71 { .p1 = 3, .p2 = 2, .n = 5, .m1 = 3, .m2 = 81 } },
840b32b7 72 { 270000,
65ce4bf5
CML		 73 { .p1 = 2, .p2 = 2, .n = 1, .m1 = 2, .m2 = 27 } }
74};
75
ef9348c8
CML		 76/*
77 * CHV supports eDP 1.4 that have more link rates.
78 * Below only provides the fixed rate but exclude variable rate.
79 */
80static const struct dp_link_dpll chv_dpll[] = {
81 /*
82 * CHV requires to program fractional division for m2.
83 * m2 is stored in fixed point format using formula below
84 * (m2_int << 22) | m2_fraction
85 */
840b32b7 86 { 162000, /* m2_int = 32, m2_fraction = 1677722 */
ef9348c8 87 { .p1 = 4, .p2 = 2, .n = 1, .m1 = 2, .m2 = 0x819999a } },
840b32b7 88 { 270000, /* m2_int = 27, m2_fraction = 0 */
ef9348c8 89 { .p1 = 4, .p2 = 1, .n = 1, .m1 = 2, .m2 = 0x6c00000 } },
840b32b7 90 { 540000, /* m2_int = 27, m2_fraction = 0 */
ef9348c8
CML		 91 { .p1 = 2, .p2 = 1, .n = 1, .m1 = 2, .m2 = 0x6c00000 } }
92};
637a9c63 93
64987fc5
SJ		 94static const int bxt_rates[] = { 162000, 216000, 243000, 270000,
95 324000, 432000, 540000 };
637a9c63 96static const int skl_rates[] = { 162000, 216000, 270000,
f4896f15
VS		 97 324000, 432000, 540000 };
98static const int default_rates[] = { 162000, 270000, 540000 };
ef9348c8 99
cfcb0fc9
JB		 100/**
101 * is_edp - is the given port attached to an eDP panel (either CPU or PCH)
102 * @intel_dp: DP struct
103 *
104 * If a CPU or PCH DP output is attached to an eDP panel, this function
105 * will return true, and false otherwise.
106 */
107static bool is_edp(struct intel_dp *intel_dp)
108{
da63a9f2
PZ		 109 struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp);
110
111 return intel_dig_port->base.type == INTEL_OUTPUT_EDP;
cfcb0fc9
JB		 112}
113
68b4d824 114static struct drm_device *intel_dp_to_dev(struct intel_dp *intel_dp)
cfcb0fc9 115{
68b4d824
ID		 116 struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp);
117
118 return intel_dig_port->base.base.dev;
cfcb0fc9
JB		 119}
120
df0e9248
CW		 121static struct intel_dp *intel_attached_dp(struct drm_connector *connector)
122{
fa90ecef 123 return enc_to_intel_dp(&intel_attached_encoder(connector)->base);
df0e9248
CW		 124}
125
ea5b213a 126static void intel_dp_link_down(struct intel_dp *intel_dp);
1e0560e0 127static bool edp_panel_vdd_on(struct intel_dp *intel_dp);
4be73780 128static void edp_panel_vdd_off(struct intel_dp *intel_dp, bool sync);
093e3f13 129static void vlv_init_panel_power_sequencer(struct intel_dp *intel_dp);
a8c3344e
VS		 130static void vlv_steal_power_sequencer(struct drm_device *dev,
131 enum pipe pipe);
a4fc5ed6 132
e0fce78f
VS		 133static unsigned int intel_dp_unused_lane_mask(int lane_count)
134{
135 return ~((1 << lane_count) - 1) & 0xf;
136}
137
ed4e9c1d
VS		 138static int
139intel_dp_max_link_bw(struct intel_dp *intel_dp)
a4fc5ed6 140{
7183dc29 141 int max_link_bw = intel_dp->dpcd[DP_MAX_LINK_RATE];
a4fc5ed6
KP		 142
143 switch (max_link_bw) {
144 case DP_LINK_BW_1_62:
145 case DP_LINK_BW_2_7:
1db10e28 146 case DP_LINK_BW_5_4:
d4eead50 147 break;
a4fc5ed6 148 default:
d4eead50
ID		 149 WARN(1, "invalid max DP link bw val %x, using 1.62Gbps\n",
150 max_link_bw);
a4fc5ed6
KP		 151 max_link_bw = DP_LINK_BW_1_62;
152 break;
153 }
154 return max_link_bw;
155}
156
eeb6324d
PZ		 157static u8 intel_dp_max_lane_count(struct intel_dp *intel_dp)
158{
159 struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp);
160 struct drm_device *dev = intel_dig_port->base.base.dev;
161 u8 source_max, sink_max;
162
163 source_max = 4;
164 if (HAS_DDI(dev) && intel_dig_port->port == PORT_A &&
165 (intel_dig_port->saved_port_bits & DDI_A_4_LANES) == 0)
166 source_max = 2;
167
168 sink_max = drm_dp_max_lane_count(intel_dp->dpcd);
169
170 return min(source_max, sink_max);
171}
172
cd9dde44
AJ		 173/*
174 * The units on the numbers in the next two are... bizarre. Examples will
175 * make it clearer; this one parallels an example in the eDP spec.
176 *
177 * intel_dp_max_data_rate for one lane of 2.7GHz evaluates as:
178 *
179 * 270000 * 1 * 8 / 10 == 216000
180 *
181 * The actual data capacity of that configuration is 2.16Gbit/s, so the
182 * units are decakilobits. ->clock in a drm_display_mode is in kilohertz -
183 * or equivalently, kilopixels per second - so for 1680x1050R it'd be
184 * 119000. At 18bpp that's 2142000 kilobits per second.
185 *
186 * Thus the strange-looking division by 10 in intel_dp_link_required, to
187 * get the result in decakilobits instead of kilobits.
188 */
189
a4fc5ed6 190static int
c898261c 191intel_dp_link_required(int pixel_clock, int bpp)
a4fc5ed6 192{
cd9dde44 193 return (pixel_clock * bpp + 9) / 10;
a4fc5ed6
KP		 194}
195
fe27d53e
DA		 196static int
197intel_dp_max_data_rate(int max_link_clock, int max_lanes)
198{
199 return (max_link_clock * max_lanes * 8) / 10;
200}
201
c19de8eb 202static enum drm_mode_status
a4fc5ed6
KP		 203intel_dp_mode_valid(struct drm_connector *connector,
204 struct drm_display_mode *mode)
205{
df0e9248 206 struct intel_dp *intel_dp = intel_attached_dp(connector);
dd06f90e
JN		 207 struct intel_connector *intel_connector = to_intel_connector(connector);
208 struct drm_display_mode *fixed_mode = intel_connector->panel.fixed_mode;
36008365
DV		 209 int target_clock = mode->clock;
210 int max_rate, mode_rate, max_lanes, max_link_clock;
a4fc5ed6 211
dd06f90e
JN		 212 if (is_edp(intel_dp) && fixed_mode) {
213 if (mode->hdisplay > fixed_mode->hdisplay)
7de56f43
ZY		 214 return MODE_PANEL;
215
dd06f90e 216 if (mode->vdisplay > fixed_mode->vdisplay)
7de56f43 217 return MODE_PANEL;
03afc4a2
DV		 218
219 target_clock = fixed_mode->clock;
7de56f43
ZY		 220 }
221
50fec21a 222 max_link_clock = intel_dp_max_link_rate(intel_dp);
eeb6324d 223 max_lanes = intel_dp_max_lane_count(intel_dp);
36008365
DV		 224
225 max_rate = intel_dp_max_data_rate(max_link_clock, max_lanes);
226 mode_rate = intel_dp_link_required(target_clock, 18);
227
228 if (mode_rate > max_rate)
c4867936 229 return MODE_CLOCK_HIGH;
a4fc5ed6
KP		 230
231 if (mode->clock < 10000)
232 return MODE_CLOCK_LOW;
233
0af78a2b
DV		 234 if (mode->flags & DRM_MODE_FLAG_DBLCLK)
235 return MODE_H_ILLEGAL;
236
a4fc5ed6
KP		 237 return MODE_OK;
238}
239
a4f1289e 240uint32_t intel_dp_pack_aux(const uint8_t *src, int src_bytes)
a4fc5ed6
KP		 241{
242 int i;
243 uint32_t v = 0;
244
245 if (src_bytes > 4)
246 src_bytes = 4;
247 for (i = 0; i < src_bytes; i++)
248 v |= ((uint32_t) src[i]) << ((3-i) * 8);
249 return v;
250}
251
c2af70e2 252static void intel_dp_unpack_aux(uint32_t src, uint8_t *dst, int dst_bytes)
a4fc5ed6
KP		 253{
254 int i;
255 if (dst_bytes > 4)
256 dst_bytes = 4;
257 for (i = 0; i < dst_bytes; i++)
258 dst[i] = src >> ((3-i) * 8);
259}
260
bf13e81b
JN		 261static void
262intel_dp_init_panel_power_sequencer(struct drm_device *dev,
36b5f425 263 struct intel_dp *intel_dp);
bf13e81b
JN		 264static void
265intel_dp_init_panel_power_sequencer_registers(struct drm_device *dev,
36b5f425 266 struct intel_dp *intel_dp);
bf13e81b 267
773538e8
VS		 268static void pps_lock(struct intel_dp *intel_dp)
269{
270 struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp);
271 struct intel_encoder *encoder = &intel_dig_port->base;
272 struct drm_device *dev = encoder->base.dev;
273 struct drm_i915_private *dev_priv = dev->dev_private;
274 enum intel_display_power_domain power_domain;
275
276 /*
277 * See vlv_power_sequencer_reset() why we need
278 * a power domain reference here.
279 */
280 power_domain = intel_display_port_power_domain(encoder);
281 intel_display_power_get(dev_priv, power_domain);
282
283 mutex_lock(&dev_priv->pps_mutex);
284}
285
286static void pps_unlock(struct intel_dp *intel_dp)
287{
288 struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp);
289 struct intel_encoder *encoder = &intel_dig_port->base;
290 struct drm_device *dev = encoder->base.dev;
291 struct drm_i915_private *dev_priv = dev->dev_private;
292 enum intel_display_power_domain power_domain;
293
294 mutex_unlock(&dev_priv->pps_mutex);
295
296 power_domain = intel_display_port_power_domain(encoder);
297 intel_display_power_put(dev_priv, power_domain);
298}
299
961a0db0
VS		 300static void
301vlv_power_sequencer_kick(struct intel_dp *intel_dp)
302{
303 struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp);
304 struct drm_device *dev = intel_dig_port->base.base.dev;
305 struct drm_i915_private *dev_priv = dev->dev_private;
306 enum pipe pipe = intel_dp->pps_pipe;
0047eedc
VS		 307 bool pll_enabled, release_cl_override = false;
308 enum dpio_phy phy = DPIO_PHY(pipe);
309 enum dpio_channel ch = vlv_pipe_to_channel(pipe);
961a0db0
VS		 310 uint32_t DP;
311
312 if (WARN(I915_READ(intel_dp->output_reg) & DP_PORT_EN,
313 "skipping pipe %c power seqeuncer kick due to port %c being active\n",
314 pipe_name(pipe), port_name(intel_dig_port->port)))
315 return;
316
317 DRM_DEBUG_KMS("kicking pipe %c power sequencer for port %c\n",
318 pipe_name(pipe), port_name(intel_dig_port->port));
319
320 /* Preserve the BIOS-computed detected bit. This is
321 * supposed to be read-only.
322 */
323 DP = I915_READ(intel_dp->output_reg) & DP_DETECTED;
324 DP |= DP_VOLTAGE_0_4 | DP_PRE_EMPHASIS_0;
325 DP |= DP_PORT_WIDTH(1);
326 DP |= DP_LINK_TRAIN_PAT_1;
327
328 if (IS_CHERRYVIEW(dev))
329 DP |= DP_PIPE_SELECT_CHV(pipe);
330 else if (pipe == PIPE_B)
331 DP |= DP_PIPEB_SELECT;
332
d288f65f
VS		 333 pll_enabled = I915_READ(DPLL(pipe)) & DPLL_VCO_ENABLE;
334
335 /*
336 * The DPLL for the pipe must be enabled for this to work.
337 * So enable temporarily it if it's not already enabled.
338 */
0047eedc
VS		 339 if (!pll_enabled) {
340 release_cl_override = IS_CHERRYVIEW(dev) &&
341 !chv_phy_powergate_ch(dev_priv, phy, ch, true);
342
d288f65f
VS		 343 vlv_force_pll_on(dev, pipe, IS_CHERRYVIEW(dev) ?
344 &chv_dpll[0].dpll : &vlv_dpll[0].dpll);
0047eedc 345 }
d288f65f 346
961a0db0
VS		 347 /*
348 * Similar magic as in intel_dp_enable_port().
349 * We _must_ do this port enable + disable trick
350 * to make this power seqeuencer lock onto the port.
351 * Otherwise even VDD force bit won't work.
352 */
353 I915_WRITE(intel_dp->output_reg, DP);
354 POSTING_READ(intel_dp->output_reg);
355
356 I915_WRITE(intel_dp->output_reg, DP | DP_PORT_EN);
357 POSTING_READ(intel_dp->output_reg);
358
359 I915_WRITE(intel_dp->output_reg, DP & ~DP_PORT_EN);
360 POSTING_READ(intel_dp->output_reg);
d288f65f 361
0047eedc 362 if (!pll_enabled) {
d288f65f 363 vlv_force_pll_off(dev, pipe);
0047eedc
VS		 364
365 if (release_cl_override)
366 chv_phy_powergate_ch(dev_priv, phy, ch, false);
367 }
961a0db0
VS		 368}
369
bf13e81b
JN		 370static enum pipe
371vlv_power_sequencer_pipe(struct intel_dp *intel_dp)
372{
373 struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp);
bf13e81b
JN		 374 struct drm_device *dev = intel_dig_port->base.base.dev;
375 struct drm_i915_private *dev_priv = dev->dev_private;
a4a5d2f8
VS		 376 struct intel_encoder *encoder;
377 unsigned int pipes = (1 << PIPE_A) | (1 << PIPE_B);
a8c3344e 378 enum pipe pipe;
bf13e81b 379
e39b999a 380 lockdep_assert_held(&dev_priv->pps_mutex);
bf13e81b 381
a8c3344e
VS		 382 /* We should never land here with regular DP ports */
383 WARN_ON(!is_edp(intel_dp));
384
a4a5d2f8
VS		 385 if (intel_dp->pps_pipe != INVALID_PIPE)
386 return intel_dp->pps_pipe;
387
388 /*
389 * We don't have power sequencer currently.
390 * Pick one that's not used by other ports.
391 */
392 list_for_each_entry(encoder, &dev->mode_config.encoder_list,
393 base.head) {
394 struct intel_dp *tmp;
395
396 if (encoder->type != INTEL_OUTPUT_EDP)
397 continue;
398
399 tmp = enc_to_intel_dp(&encoder->base);
400
401 if (tmp->pps_pipe != INVALID_PIPE)
402 pipes &= ~(1 << tmp->pps_pipe);
403 }
404
405 /*
406 * Didn't find one. This should not happen since there
407 * are two power sequencers and up to two eDP ports.
408 */
409 if (WARN_ON(pipes == 0))
a8c3344e
VS		 410 pipe = PIPE_A;
411 else
412 pipe = ffs(pipes) - 1;
a4a5d2f8 413
a8c3344e
VS		 414 vlv_steal_power_sequencer(dev, pipe);
415 intel_dp->pps_pipe = pipe;
a4a5d2f8
VS		 416
417 DRM_DEBUG_KMS("picked pipe %c power sequencer for port %c\n",
418 pipe_name(intel_dp->pps_pipe),
419 port_name(intel_dig_port->port));
420
421 /* init power sequencer on this pipe and port */
36b5f425
VS		 422 intel_dp_init_panel_power_sequencer(dev, intel_dp);
423 intel_dp_init_panel_power_sequencer_registers(dev, intel_dp);
a4a5d2f8 424
961a0db0
VS		 425 /*
426 * Even vdd force doesn't work until we've made
427 * the power sequencer lock in on the port.
428 */
429 vlv_power_sequencer_kick(intel_dp);
a4a5d2f8
VS		 430
431 return intel_dp->pps_pipe;
432}
433
6491ab27
VS		 434typedef bool (*vlv_pipe_check)(struct drm_i915_private *dev_priv,
435 enum pipe pipe);
436
437static bool vlv_pipe_has_pp_on(struct drm_i915_private *dev_priv,
438 enum pipe pipe)
439{
440 return I915_READ(VLV_PIPE_PP_STATUS(pipe)) & PP_ON;
441}
442
443static bool vlv_pipe_has_vdd_on(struct drm_i915_private *dev_priv,
444 enum pipe pipe)
445{
446 return I915_READ(VLV_PIPE_PP_CONTROL(pipe)) & EDP_FORCE_VDD;
447}
448
449static bool vlv_pipe_any(struct drm_i915_private *dev_priv,
450 enum pipe pipe)
451{
452 return true;
453}
bf13e81b 454
a4a5d2f8 455static enum pipe
6491ab27
VS		 456vlv_initial_pps_pipe(struct drm_i915_private *dev_priv,
457 enum port port,
458 vlv_pipe_check pipe_check)
a4a5d2f8
VS		 459{
460 enum pipe pipe;
bf13e81b 461
bf13e81b
JN		 462 for (pipe = PIPE_A; pipe <= PIPE_B; pipe++) {
463 u32 port_sel = I915_READ(VLV_PIPE_PP_ON_DELAYS(pipe)) &
464 PANEL_PORT_SELECT_MASK;
a4a5d2f8
VS		 465
466 if (port_sel != PANEL_PORT_SELECT_VLV(port))
467 continue;
468
6491ab27
VS		 469 if (!pipe_check(dev_priv, pipe))
470 continue;
471
a4a5d2f8 472 return pipe;
bf13e81b
JN		 473 }
474
a4a5d2f8
VS		 475 return INVALID_PIPE;
476}
477
478static void
479vlv_initial_power_sequencer_setup(struct intel_dp *intel_dp)
480{
481 struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp);
482 struct drm_device *dev = intel_dig_port->base.base.dev;
483 struct drm_i915_private *dev_priv = dev->dev_private;
a4a5d2f8
VS		 484 enum port port = intel_dig_port->port;
485
486 lockdep_assert_held(&dev_priv->pps_mutex);
487
488 /* try to find a pipe with this port selected */
6491ab27
VS		 489 /* first pick one where the panel is on */
490 intel_dp->pps_pipe = vlv_initial_pps_pipe(dev_priv, port,
491 vlv_pipe_has_pp_on);
492 /* didn't find one? pick one where vdd is on */
493 if (intel_dp->pps_pipe == INVALID_PIPE)
494 intel_dp->pps_pipe = vlv_initial_pps_pipe(dev_priv, port,
495 vlv_pipe_has_vdd_on);
496 /* didn't find one? pick one with just the correct port */
497 if (intel_dp->pps_pipe == INVALID_PIPE)
498 intel_dp->pps_pipe = vlv_initial_pps_pipe(dev_priv, port,
499 vlv_pipe_any);
a4a5d2f8
VS		 500
501 /* didn't find one? just let vlv_power_sequencer_pipe() pick one when needed */
502 if (intel_dp->pps_pipe == INVALID_PIPE) {
503 DRM_DEBUG_KMS("no initial power sequencer for port %c\n",
504 port_name(port));
505 return;
bf13e81b
JN		 506 }
507
a4a5d2f8
VS		 508 DRM_DEBUG_KMS("initial power sequencer for port %c: pipe %c\n",
509 port_name(port), pipe_name(intel_dp->pps_pipe));
510
36b5f425
VS		 511 intel_dp_init_panel_power_sequencer(dev, intel_dp);
512 intel_dp_init_panel_power_sequencer_registers(dev, intel_dp);
bf13e81b
JN		 513}
514
773538e8
VS		 515void vlv_power_sequencer_reset(struct drm_i915_private *dev_priv)
516{
517 struct drm_device *dev = dev_priv->dev;
518 struct intel_encoder *encoder;
519
520 if (WARN_ON(!IS_VALLEYVIEW(dev)))
521 return;
522
523 /*
524 * We can't grab pps_mutex here due to deadlock with power_domain
525 * mutex when power_domain functions are called while holding pps_mutex.
526 * That also means that in order to use pps_pipe the code needs to
527 * hold both a power domain reference and pps_mutex, and the power domain
528 * reference get/put must be done while _not_ holding pps_mutex.
529 * pps_{lock,unlock}() do these steps in the correct order, so one
530 * should use them always.
531 */
532
533 list_for_each_entry(encoder, &dev->mode_config.encoder_list, base.head) {
534 struct intel_dp *intel_dp;
535
536 if (encoder->type != INTEL_OUTPUT_EDP)
537 continue;
538
539 intel_dp = enc_to_intel_dp(&encoder->base);
540 intel_dp->pps_pipe = INVALID_PIPE;
541 }
bf13e81b
JN		 542}
543
544static u32 _pp_ctrl_reg(struct intel_dp *intel_dp)
545{
546 struct drm_device *dev = intel_dp_to_dev(intel_dp);
547
b0a08bec
VK		 548 if (IS_BROXTON(dev))
549 return BXT_PP_CONTROL(0);
550 else if (HAS_PCH_SPLIT(dev))
bf13e81b
JN		 551 return PCH_PP_CONTROL;
552 else
553 return VLV_PIPE_PP_CONTROL(vlv_power_sequencer_pipe(intel_dp));
554}
555
556static u32 _pp_stat_reg(struct intel_dp *intel_dp)
557{
558 struct drm_device *dev = intel_dp_to_dev(intel_dp);
559
b0a08bec
VK		 560 if (IS_BROXTON(dev))
561 return BXT_PP_STATUS(0);
562 else if (HAS_PCH_SPLIT(dev))
bf13e81b
JN		 563 return PCH_PP_STATUS;
564 else
565 return VLV_PIPE_PP_STATUS(vlv_power_sequencer_pipe(intel_dp));
566}
567
01527b31
CT		 568/* Reboot notifier handler to shutdown panel power to guarantee T12 timing
569 This function only applicable when panel PM state is not to be tracked */
570static int edp_notify_handler(struct notifier_block *this, unsigned long code,
571 void *unused)
572{
573 struct intel_dp *intel_dp = container_of(this, typeof(* intel_dp),
574 edp_notifier);
575 struct drm_device *dev = intel_dp_to_dev(intel_dp);
576 struct drm_i915_private *dev_priv = dev->dev_private;
01527b31
CT		 577
578 if (!is_edp(intel_dp) || code != SYS_RESTART)
579 return 0;
580
773538e8 581 pps_lock(intel_dp);
e39b999a 582
01527b31 583 if (IS_VALLEYVIEW(dev)) {
e39b999a 584 enum pipe pipe = vlv_power_sequencer_pipe(intel_dp);
649636ef
VS		 585 u32 pp_ctrl_reg, pp_div_reg;
586 u32 pp_div;
e39b999a 587
01527b31
CT		 588 pp_ctrl_reg = VLV_PIPE_PP_CONTROL(pipe);
589 pp_div_reg = VLV_PIPE_PP_DIVISOR(pipe);
590 pp_div = I915_READ(pp_div_reg);
591 pp_div &= PP_REFERENCE_DIVIDER_MASK;
592
593 /* 0x1F write to PP_DIV_REG sets max cycle delay */
594 I915_WRITE(pp_div_reg, pp_div | 0x1F);
595 I915_WRITE(pp_ctrl_reg, PANEL_UNLOCK_REGS | PANEL_POWER_OFF);
596 msleep(intel_dp->panel_power_cycle_delay);
597 }
598
773538e8 599 pps_unlock(intel_dp);
e39b999a 600
01527b31
CT		 601 return 0;
602}
603
4be73780 604static bool edp_have_panel_power(struct intel_dp *intel_dp)
ebf33b18 605{
30add22d 606 struct drm_device *dev = intel_dp_to_dev(intel_dp);
ebf33b18
KP		 607 struct drm_i915_private *dev_priv = dev->dev_private;
608
e39b999a
VS		 609 lockdep_assert_held(&dev_priv->pps_mutex);
610
9a42356b
VS		 611 if (IS_VALLEYVIEW(dev) &&
612 intel_dp->pps_pipe == INVALID_PIPE)
613 return false;
614
bf13e81b 615 return (I915_READ(_pp_stat_reg(intel_dp)) & PP_ON) != 0;
ebf33b18
KP		 616}
617
4be73780 618static bool edp_have_panel_vdd(struct intel_dp *intel_dp)
ebf33b18 619{
30add22d 620 struct drm_device *dev = intel_dp_to_dev(intel_dp);
ebf33b18
KP		 621 struct drm_i915_private *dev_priv = dev->dev_private;
622
e39b999a
VS		 623 lockdep_assert_held(&dev_priv->pps_mutex);
624
9a42356b
VS		 625 if (IS_VALLEYVIEW(dev) &&
626 intel_dp->pps_pipe == INVALID_PIPE)
627 return false;
628
773538e8 629 return I915_READ(_pp_ctrl_reg(intel_dp)) & EDP_FORCE_VDD;
ebf33b18
KP		 630}
631
9b984dae
KP		 632static void
633intel_dp_check_edp(struct intel_dp *intel_dp)
634{
30add22d 635 struct drm_device *dev = intel_dp_to_dev(intel_dp);
9b984dae 636 struct drm_i915_private *dev_priv = dev->dev_private;
ebf33b18 637
9b984dae
KP		 638 if (!is_edp(intel_dp))
639 return;
453c5420 640
4be73780 641 if (!edp_have_panel_power(intel_dp) && !edp_have_panel_vdd(intel_dp)) {
9b984dae
KP		 642 WARN(1, "eDP powered off while attempting aux channel communication.\n");
643 DRM_DEBUG_KMS("Status 0x%08x Control 0x%08x\n",
bf13e81b
JN		 644 I915_READ(_pp_stat_reg(intel_dp)),
645 I915_READ(_pp_ctrl_reg(intel_dp)));
9b984dae
KP		 646 }
647}
648
9ee32fea
DV		 649static uint32_t
650intel_dp_aux_wait_done(struct intel_dp *intel_dp, bool has_aux_irq)
651{
652 struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp);
653 struct drm_device *dev = intel_dig_port->base.base.dev;
654 struct drm_i915_private *dev_priv = dev->dev_private;
9ed35ab1 655 uint32_t ch_ctl = intel_dp->aux_ch_ctl_reg;
9ee32fea
DV		 656 uint32_t status;
657 bool done;
658
ef04f00d 659#define C (((status = I915_READ_NOTRACE(ch_ctl)) & DP_AUX_CH_CTL_SEND_BUSY) == 0)
9ee32fea 660 if (has_aux_irq)
b18ac466 661 done = wait_event_timeout(dev_priv->gmbus_wait_queue, C,
3598706b 662 msecs_to_jiffies_timeout(10));
9ee32fea
DV		 663 else
664 done = wait_for_atomic(C, 10) == 0;
665 if (!done)
666 DRM_ERROR("dp aux hw did not signal timeout (has irq: %i)!\n",
667 has_aux_irq);
668#undef C
669
670 return status;
671}
672
ec5b01dd 673static uint32_t i9xx_get_aux_clock_divider(struct intel_dp *intel_dp, int index)
a4fc5ed6 674{
174edf1f
PZ		 675 struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp);
676 struct drm_device *dev = intel_dig_port->base.base.dev;
9ee32fea 677
ec5b01dd
DL		 678 /*
679 * The clock divider is based off the hrawclk, and would like to run at
680 * 2MHz. So, take the hrawclk value and divide by 2 and use that
a4fc5ed6 681 */
ec5b01dd
DL		 682 return index ? 0 : intel_hrawclk(dev) / 2;
683}
684
685static uint32_t ilk_get_aux_clock_divider(struct intel_dp *intel_dp, int index)
686{
687 struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp);
688 struct drm_device *dev = intel_dig_port->base.base.dev;
469d4b2a 689 struct drm_i915_private *dev_priv = dev->dev_private;
ec5b01dd
DL		 690
691 if (index)
692 return 0;
693
694 if (intel_dig_port->port == PORT_A) {
05024da3
VS		 695 return DIV_ROUND_UP(dev_priv->cdclk_freq, 2000);
696
ec5b01dd
DL		 697 } else {
698 return DIV_ROUND_UP(intel_pch_rawclk(dev), 2);
699 }
700}
701
702static uint32_t hsw_get_aux_clock_divider(struct intel_dp *intel_dp, int index)
703{
704 struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp);
705 struct drm_device *dev = intel_dig_port->base.base.dev;
706 struct drm_i915_private *dev_priv = dev->dev_private;
707
708 if (intel_dig_port->port == PORT_A) {
709 if (index)
710 return 0;
05024da3 711 return DIV_ROUND_CLOSEST(dev_priv->cdclk_freq, 2000);
2c55c336
JN		 712 } else if (dev_priv->pch_id == INTEL_PCH_LPT_DEVICE_ID_TYPE) {
713 /* Workaround for non-ULT HSW */
bc86625a
CW		 714 switch (index) {
715 case 0: return 63;
716 case 1: return 72;
717 default: return 0;
718 }
ec5b01dd 719 } else {
bc86625a 720 return index ? 0 : DIV_ROUND_UP(intel_pch_rawclk(dev), 2);
2c55c336 721 }
b84a1cf8
RV		 722}
723
ec5b01dd
DL		 724static uint32_t vlv_get_aux_clock_divider(struct intel_dp *intel_dp, int index)
725{
726 return index ? 0 : 100;
727}
728
b6b5e383
DL		 729static uint32_t skl_get_aux_clock_divider(struct intel_dp *intel_dp, int index)
730{
731 /*
732 * SKL doesn't need us to program the AUX clock divider (Hardware will
733 * derive the clock from CDCLK automatically). We still implement the
734 * get_aux_clock_divider vfunc to plug-in into the existing code.
735 */
736 return index ? 0 : 1;
737}
738
5ed12a19
DL		 739static uint32_t i9xx_get_aux_send_ctl(struct intel_dp *intel_dp,
740 bool has_aux_irq,
741 int send_bytes,
742 uint32_t aux_clock_divider)
743{
744 struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp);
745 struct drm_device *dev = intel_dig_port->base.base.dev;
746 uint32_t precharge, timeout;
747
748 if (IS_GEN6(dev))
749 precharge = 3;
750 else
751 precharge = 5;
752
753 if (IS_BROADWELL(dev) && intel_dp->aux_ch_ctl_reg == DPA_AUX_CH_CTL)
754 timeout = DP_AUX_CH_CTL_TIME_OUT_600us;
755 else
756 timeout = DP_AUX_CH_CTL_TIME_OUT_400us;
757
758 return DP_AUX_CH_CTL_SEND_BUSY |
788d4433 759 DP_AUX_CH_CTL_DONE |
5ed12a19 760 (has_aux_irq ? DP_AUX_CH_CTL_INTERRUPT : 0) |
788d4433 761 DP_AUX_CH_CTL_TIME_OUT_ERROR |
5ed12a19 762 timeout |
788d4433 763 DP_AUX_CH_CTL_RECEIVE_ERROR |
5ed12a19
DL		 764 (send_bytes << DP_AUX_CH_CTL_MESSAGE_SIZE_SHIFT) |
765 (precharge << DP_AUX_CH_CTL_PRECHARGE_2US_SHIFT) |
788d4433 766 (aux_clock_divider << DP_AUX_CH_CTL_BIT_CLOCK_2X_SHIFT);
5ed12a19
DL		 767}
768
b9ca5fad
DL		 769static uint32_t skl_get_aux_send_ctl(struct intel_dp *intel_dp,
770 bool has_aux_irq,
771 int send_bytes,
772 uint32_t unused)
773{
774 return DP_AUX_CH_CTL_SEND_BUSY |
775 DP_AUX_CH_CTL_DONE |
776 (has_aux_irq ? DP_AUX_CH_CTL_INTERRUPT : 0) |
777 DP_AUX_CH_CTL_TIME_OUT_ERROR |
778 DP_AUX_CH_CTL_TIME_OUT_1600us |
779 DP_AUX_CH_CTL_RECEIVE_ERROR |
780 (send_bytes << DP_AUX_CH_CTL_MESSAGE_SIZE_SHIFT) |
781 DP_AUX_CH_CTL_SYNC_PULSE_SKL(32);
782}
783
b84a1cf8
RV		 784static int
785intel_dp_aux_ch(struct intel_dp *intel_dp,
bd9f74a5 786 const uint8_t *send, int send_bytes,
b84a1cf8
RV		 787 uint8_t *recv, int recv_size)
788{
789 struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp);
790 struct drm_device *dev = intel_dig_port->base.base.dev;
791 struct drm_i915_private *dev_priv = dev->dev_private;
792 uint32_t ch_ctl = intel_dp->aux_ch_ctl_reg;
793 uint32_t ch_data = ch_ctl + 4;
bc86625a 794 uint32_t aux_clock_divider;
b84a1cf8
RV		 795 int i, ret, recv_bytes;
796 uint32_t status;
5ed12a19 797 int try, clock = 0;
4e6b788c 798 bool has_aux_irq = HAS_AUX_IRQ(dev);
884f19e9
JN		 799 bool vdd;
800
773538e8 801 pps_lock(intel_dp);
e39b999a 802
72c3500a
VS		 803 /*
804 * We will be called with VDD already enabled for dpcd/edid/oui reads.
805 * In such cases we want to leave VDD enabled and it's up to upper layers
806 * to turn it off. But for eg. i2c-dev access we need to turn it on/off
807 * ourselves.
808 */
1e0560e0 809 vdd = edp_panel_vdd_on(intel_dp);
b84a1cf8
RV		 810
811 /* dp aux is extremely sensitive to irq latency, hence request the
812 * lowest possible wakeup latency and so prevent the cpu from going into
813 * deep sleep states.
814 */
815 pm_qos_update_request(&dev_priv->pm_qos, 0);
816
817 intel_dp_check_edp(intel_dp);
5eb08b69 818
c67a470b
PZ		 819 intel_aux_display_runtime_get(dev_priv);
820
11bee43e
JB		 821 /* Try to wait for any previous AUX channel activity */
822 for (try = 0; try < 3; try++) {
ef04f00d 823 status = I915_READ_NOTRACE(ch_ctl);
11bee43e
JB		 824 if ((status & DP_AUX_CH_CTL_SEND_BUSY) == 0)
825 break;
826 msleep(1);
827 }
828
829 if (try == 3) {
02196c77
MK		 830 static u32 last_status = -1;
831 const u32 status = I915_READ(ch_ctl);
832
833 if (status != last_status) {
834 WARN(1, "dp_aux_ch not started status 0x%08x\n",
835 status);
836 last_status = status;
837 }
838
9ee32fea
DV		 839 ret = -EBUSY;
840 goto out;
4f7f7b7e
CW		 841 }
842
46a5ae9f
PZ		 843 /* Only 5 data registers! */
844 if (WARN_ON(send_bytes > 20 || recv_size > 20)) {
845 ret = -E2BIG;
846 goto out;
847 }
848
ec5b01dd 849 while ((aux_clock_divider = intel_dp->get_aux_clock_divider(intel_dp, clock++))) {
153b1100
DL		 850 u32 send_ctl = intel_dp->get_aux_send_ctl(intel_dp,
851 has_aux_irq,
852 send_bytes,
853 aux_clock_divider);
5ed12a19 854
bc86625a
CW		 855 /* Must try at least 3 times according to DP spec */
856 for (try = 0; try < 5; try++) {
857 /* Load the send data into the aux channel data registers */
858 for (i = 0; i < send_bytes; i += 4)
859 I915_WRITE(ch_data + i,
a4f1289e
RV		 860 intel_dp_pack_aux(send + i,
861 send_bytes - i));
bc86625a
CW		 862
863 /* Send the command and wait for it to complete */
5ed12a19 864 I915_WRITE(ch_ctl, send_ctl);
bc86625a
CW		 865
866 status = intel_dp_aux_wait_done(intel_dp, has_aux_irq);
867
868 /* Clear done status and any errors */
869 I915_WRITE(ch_ctl,
870 status |
871 DP_AUX_CH_CTL_DONE |
872 DP_AUX_CH_CTL_TIME_OUT_ERROR |
873 DP_AUX_CH_CTL_RECEIVE_ERROR);
874
74ebf294 875 if (status & DP_AUX_CH_CTL_TIME_OUT_ERROR)
bc86625a 876 continue;
74ebf294
TP		 877
878 /* DP CTS 1.2 Core Rev 1.1, 4.2.1.1 & 4.2.1.2
879 * 400us delay required for errors and timeouts
880 * Timeout errors from the HW already meet this
881 * requirement so skip to next iteration
882 */
883 if (status & DP_AUX_CH_CTL_RECEIVE_ERROR) {
884 usleep_range(400, 500);
bc86625a 885 continue;
74ebf294 886 }
bc86625a 887 if (status & DP_AUX_CH_CTL_DONE)
e058c945 888 goto done;
bc86625a 889 }
a4fc5ed6
KP		 890 }
891
a4fc5ed6 892 if ((status & DP_AUX_CH_CTL_DONE) == 0) {
1ae8c0a5 893 DRM_ERROR("dp_aux_ch not done status 0x%08x\n", status);
9ee32fea
DV		 894 ret = -EBUSY;
895 goto out;
a4fc5ed6
KP		 896 }
897
e058c945 898done:
a4fc5ed6
KP		 899 /* Check for timeout or receive error.
900 * Timeouts occur when the sink is not connected
901 */
a5b3da54 902 if (status & DP_AUX_CH_CTL_RECEIVE_ERROR) {
1ae8c0a5 903 DRM_ERROR("dp_aux_ch receive error status 0x%08x\n", status);
9ee32fea
DV		 904 ret = -EIO;
905 goto out;
a5b3da54 906 }
1ae8c0a5
KP		 907
908 /* Timeouts occur when the device isn't connected, so they're
909 * "normal" -- don't fill the kernel log with these */
a5b3da54 910 if (status & DP_AUX_CH_CTL_TIME_OUT_ERROR) {
28c97730 911 DRM_DEBUG_KMS("dp_aux_ch timeout status 0x%08x\n", status);
9ee32fea
DV		 912 ret = -ETIMEDOUT;
913 goto out;
a4fc5ed6
KP		 914 }
915
916 /* Unload any bytes sent back from the other side */
917 recv_bytes = ((status & DP_AUX_CH_CTL_MESSAGE_SIZE_MASK) >>
918 DP_AUX_CH_CTL_MESSAGE_SIZE_SHIFT);
a4fc5ed6
KP		 919 if (recv_bytes > recv_size)
920 recv_bytes = recv_size;
0206e353 921
4f7f7b7e 922 for (i = 0; i < recv_bytes; i += 4)
a4f1289e
RV		 923 intel_dp_unpack_aux(I915_READ(ch_data + i),
924 recv + i, recv_bytes - i);
a4fc5ed6 925
9ee32fea
DV		 926 ret = recv_bytes;
927out:
928 pm_qos_update_request(&dev_priv->pm_qos, PM_QOS_DEFAULT_VALUE);
c67a470b 929 intel_aux_display_runtime_put(dev_priv);
9ee32fea 930
884f19e9
JN		 931 if (vdd)
932 edp_panel_vdd_off(intel_dp, false);
933
773538e8 934 pps_unlock(intel_dp);
e39b999a 935
9ee32fea 936 return ret;
a4fc5ed6
KP		 937}
938
a6c8aff0
JN		 939#define BARE_ADDRESS_SIZE 3
940#define HEADER_SIZE (BARE_ADDRESS_SIZE + 1)
9d1a1031
JN		 941static ssize_t
942intel_dp_aux_transfer(struct drm_dp_aux *aux, struct drm_dp_aux_msg *msg)
a4fc5ed6 943{
9d1a1031
JN		 944 struct intel_dp *intel_dp = container_of(aux, struct intel_dp, aux);
945 uint8_t txbuf[20], rxbuf[20];
946 size_t txsize, rxsize;
a4fc5ed6 947 int ret;
a4fc5ed6 948
d2d9cbbd
VS		 949 txbuf[0] = (msg->request << 4) |
950 ((msg->address >> 16) & 0xf);
951 txbuf[1] = (msg->address >> 8) & 0xff;
9d1a1031
JN		 952 txbuf[2] = msg->address & 0xff;
953 txbuf[3] = msg->size - 1;
46a5ae9f 954
9d1a1031
JN		 955 switch (msg->request & ~DP_AUX_I2C_MOT) {
956 case DP_AUX_NATIVE_WRITE:
957 case DP_AUX_I2C_WRITE:
c1e74122 958 case DP_AUX_I2C_WRITE_STATUS_UPDATE:
a6c8aff0 959 txsize = msg->size ? HEADER_SIZE + msg->size : BARE_ADDRESS_SIZE;
a1ddefd8 960 rxsize = 2; /* 0 or 1 data bytes */
f51a44b9 961
9d1a1031
JN		 962 if (WARN_ON(txsize > 20))
963 return -E2BIG;
a4fc5ed6 964
9d1a1031 965 memcpy(txbuf + HEADER_SIZE, msg->buffer, msg->size);
a4fc5ed6 966
9d1a1031
JN		 967 ret = intel_dp_aux_ch(intel_dp, txbuf, txsize, rxbuf, rxsize);
968 if (ret > 0) {
969 msg->reply = rxbuf[0] >> 4;
a4fc5ed6 970
a1ddefd8
JN		 971 if (ret > 1) {
972 /* Number of bytes written in a short write. */
973 ret = clamp_t(int, rxbuf[1], 0, msg->size);
974 } else {
975 /* Return payload size. */
976 ret = msg->size;
977 }
9d1a1031
JN		 978 }
979 break;
46a5ae9f 980
9d1a1031
JN		 981 case DP_AUX_NATIVE_READ:
982 case DP_AUX_I2C_READ:
a6c8aff0 983 txsize = msg->size ? HEADER_SIZE : BARE_ADDRESS_SIZE;
9d1a1031 984 rxsize = msg->size + 1;
a4fc5ed6 985
9d1a1031
JN		 986 if (WARN_ON(rxsize > 20))
987 return -E2BIG;
a4fc5ed6 988
9d1a1031
JN		 989 ret = intel_dp_aux_ch(intel_dp, txbuf, txsize, rxbuf, rxsize);
990 if (ret > 0) {
991 msg->reply = rxbuf[0] >> 4;
992 /*
993 * Assume happy day, and copy the data. The caller is
994 * expected to check msg->reply before touching it.
995 *
996 * Return payload size.
997 */
998 ret--;
999 memcpy(msg->buffer, rxbuf + 1, ret);
a4fc5ed6 1000 }
9d1a1031
JN		 1001 break;
1002
1003 default:
1004 ret = -EINVAL;
1005 break;
a4fc5ed6 1006 }
f51a44b9 1007
9d1a1031 1008 return ret;
a4fc5ed6
KP		 1009}
1010
9d1a1031
JN		 1011static void
1012intel_dp_aux_init(struct intel_dp *intel_dp, struct intel_connector *connector)
1013{
1014 struct drm_device *dev = intel_dp_to_dev(intel_dp);
500ea70d 1015 struct drm_i915_private *dev_priv = dev->dev_private;
33ad6626
JN		 1016 struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp);
1017 enum port port = intel_dig_port->port;
500ea70d 1018 struct ddi_vbt_port_info *info = &dev_priv->vbt.ddi_port_info[port];
0b99836f 1019 const char *name = NULL;
500ea70d 1020 uint32_t porte_aux_ctl_reg = DPA_AUX_CH_CTL;
ab2c0672
DA		 1021 int ret;
1022
500ea70d
RV		 1023 /* On SKL we don't have Aux for port E so we rely on VBT to set
1024 * a proper alternate aux channel.
1025 */
ef11bdb3 1026 if ((IS_SKYLAKE(dev) || IS_KABYLAKE(dev)) && port == PORT_E) {
500ea70d
RV		 1027 switch (info->alternate_aux_channel) {
1028 case DP_AUX_B:
1029 porte_aux_ctl_reg = DPB_AUX_CH_CTL;
1030 break;
1031 case DP_AUX_C:
1032 porte_aux_ctl_reg = DPC_AUX_CH_CTL;
1033 break;
1034 case DP_AUX_D:
1035 porte_aux_ctl_reg = DPD_AUX_CH_CTL;
1036 break;
1037 case DP_AUX_A:
1038 default:
1039 porte_aux_ctl_reg = DPA_AUX_CH_CTL;
1040 }
1041 }
1042
33ad6626
JN		 1043 switch (port) {
1044 case PORT_A:
1045 intel_dp->aux_ch_ctl_reg = DPA_AUX_CH_CTL;
0b99836f 1046 name = "DPDDC-A";
ab2c0672 1047 break;
33ad6626
JN		 1048 case PORT_B:
1049 intel_dp->aux_ch_ctl_reg = PCH_DPB_AUX_CH_CTL;
0b99836f 1050 name = "DPDDC-B";
ab2c0672 1051 break;
33ad6626
JN		 1052 case PORT_C:
1053 intel_dp->aux_ch_ctl_reg = PCH_DPC_AUX_CH_CTL;
0b99836f 1054 name = "DPDDC-C";
ab2c0672 1055 break;
33ad6626
JN		 1056 case PORT_D:
1057 intel_dp->aux_ch_ctl_reg = PCH_DPD_AUX_CH_CTL;
0b99836f 1058 name = "DPDDC-D";
33ad6626 1059 break;
500ea70d
RV		 1060 case PORT_E:
1061 intel_dp->aux_ch_ctl_reg = porte_aux_ctl_reg;
1062 name = "DPDDC-E";
1063 break;
33ad6626
JN		 1064 default:
1065 BUG();
ab2c0672
DA		 1066 }
1067
1b1aad75
DL		 1068 /*
1069 * The AUX_CTL register is usually DP_CTL + 0x10.
1070 *
1071 * On Haswell and Broadwell though:
1072 * - Both port A DDI_BUF_CTL and DDI_AUX_CTL are on the CPU
1073 * - Port B/C/D AUX channels are on the PCH, DDI_BUF_CTL on the CPU
1074 *
1075 * Skylake moves AUX_CTL back next to DDI_BUF_CTL, on the CPU.
1076 */
500ea70d 1077 if (!IS_HASWELL(dev) && !IS_BROADWELL(dev) && port != PORT_E)
33ad6626 1078 intel_dp->aux_ch_ctl_reg = intel_dp->output_reg + 0x10;
8316f337 1079
0b99836f 1080 intel_dp->aux.name = name;
9d1a1031
JN		 1081 intel_dp->aux.dev = dev->dev;
1082 intel_dp->aux.transfer = intel_dp_aux_transfer;
8316f337 1083
0b99836f
JN		 1084 DRM_DEBUG_KMS("registering %s bus for %s\n", name,
1085 connector->base.kdev->kobj.name);
8316f337 1086
4f71d0cb 1087 ret = drm_dp_aux_register(&intel_dp->aux);
0b99836f 1088 if (ret < 0) {
4f71d0cb 1089 DRM_ERROR("drm_dp_aux_register() for %s failed (%d)\n",
0b99836f
JN		 1090 name, ret);
1091 return;
ab2c0672 1092 }
8a5e6aeb 1093
0b99836f
JN		 1094 ret = sysfs_create_link(&connector->base.kdev->kobj,
1095 &intel_dp->aux.ddc.dev.kobj,
1096 intel_dp->aux.ddc.dev.kobj.name);
1097 if (ret < 0) {
1098 DRM_ERROR("sysfs_create_link() for %s failed (%d)\n", name, ret);
4f71d0cb 1099 drm_dp_aux_unregister(&intel_dp->aux);
ab2c0672 1100 }
a4fc5ed6
KP		 1101}
1102
80f65de3
ID		 1103static void
1104intel_dp_connector_unregister(struct intel_connector *intel_connector)
1105{
1106 struct intel_dp *intel_dp = intel_attached_dp(&intel_connector->base);
1107
0e32b39c
DA		 1108 if (!intel_connector->mst_port)
1109 sysfs_remove_link(&intel_connector->base.kdev->kobj,
1110 intel_dp->aux.ddc.dev.kobj.name);
80f65de3
ID		 1111 intel_connector_unregister(intel_connector);
1112}
1113
5416d871 1114static void
840b32b7 1115skl_edp_set_pll_config(struct intel_crtc_state *pipe_config)
5416d871
DL		 1116{
1117 u32 ctrl1;
1118
dd3cd74a
ACO		 1119 memset(&pipe_config->dpll_hw_state, 0,
1120 sizeof(pipe_config->dpll_hw_state));
1121
5416d871
DL		 1122 pipe_config->ddi_pll_sel = SKL_DPLL0;
1123 pipe_config->dpll_hw_state.cfgcr1 = 0;
1124 pipe_config->dpll_hw_state.cfgcr2 = 0;
1125
1126 ctrl1 = DPLL_CTRL1_OVERRIDE(SKL_DPLL0);
840b32b7 1127 switch (pipe_config->port_clock / 2) {
c3346ef6 1128 case 81000:
71cd8423 1129 ctrl1 |= DPLL_CTRL1_LINK_RATE(DPLL_CTRL1_LINK_RATE_810,
5416d871
DL		 1130 SKL_DPLL0);
1131 break;
c3346ef6 1132 case 135000:
71cd8423 1133 ctrl1 |= DPLL_CTRL1_LINK_RATE(DPLL_CTRL1_LINK_RATE_1350,
5416d871
DL		 1134 SKL_DPLL0);
1135 break;
c3346ef6 1136 case 270000:
71cd8423 1137 ctrl1 |= DPLL_CTRL1_LINK_RATE(DPLL_CTRL1_LINK_RATE_2700,
5416d871
DL		 1138 SKL_DPLL0);
1139 break;
c3346ef6 1140 case 162000:
71cd8423 1141 ctrl1 |= DPLL_CTRL1_LINK_RATE(DPLL_CTRL1_LINK_RATE_1620,
c3346ef6
SJ		 1142 SKL_DPLL0);
1143 break;
1144 /* TBD: For DP link rates 2.16 GHz and 4.32 GHz, VCO is 8640 which
1145 results in CDCLK change. Need to handle the change of CDCLK by
1146 disabling pipes and re-enabling them */
1147 case 108000:
71cd8423 1148 ctrl1 |= DPLL_CTRL1_LINK_RATE(DPLL_CTRL1_LINK_RATE_1080,
c3346ef6
SJ		 1149 SKL_DPLL0);
1150 break;
1151 case 216000:
71cd8423 1152 ctrl1 |= DPLL_CTRL1_LINK_RATE(DPLL_CTRL1_LINK_RATE_2160,
c3346ef6
SJ		 1153 SKL_DPLL0);
1154 break;
1155
5416d871
DL		 1156 }
1157 pipe_config->dpll_hw_state.ctrl1 = ctrl1;
1158}
1159
6fa2d197 1160void
840b32b7 1161hsw_dp_set_ddi_pll_sel(struct intel_crtc_state *pipe_config)
0e50338c 1162{
ee46f3c7
ACO		 1163 memset(&pipe_config->dpll_hw_state, 0,
1164 sizeof(pipe_config->dpll_hw_state));
1165
840b32b7
VS		 1166 switch (pipe_config->port_clock / 2) {
1167 case 81000:
0e50338c
DV		 1168 pipe_config->ddi_pll_sel = PORT_CLK_SEL_LCPLL_810;
1169 break;
840b32b7 1170 case 135000:
0e50338c
DV		 1171 pipe_config->ddi_pll_sel = PORT_CLK_SEL_LCPLL_1350;
1172 break;
840b32b7 1173 case 270000:
0e50338c
DV		 1174 pipe_config->ddi_pll_sel = PORT_CLK_SEL_LCPLL_2700;
1175 break;
1176 }
1177}
1178
fc0f8e25 1179static int
12f6a2e2 1180intel_dp_sink_rates(struct intel_dp *intel_dp, const int **sink_rates)
fc0f8e25 1181{
94ca719e
VS		 1182 if (intel_dp->num_sink_rates) {
1183 *sink_rates = intel_dp->sink_rates;
1184 return intel_dp->num_sink_rates;
fc0f8e25 1185 }
12f6a2e2
VS		 1186
1187 *sink_rates = default_rates;
1188
1189 return (intel_dp_max_link_bw(intel_dp) >> 3) + 1;
fc0f8e25
SJ		 1190}
1191
94223d04 1192bool intel_dp_source_supports_hbr2(struct drm_device *dev)
ed63baaf
TS		 1193{
1194 /* WaDisableHBR2:skl */
e87a005d 1195 if (IS_SKL_REVID(dev, 0, SKL_REVID_B0))
ed63baaf
TS		 1196 return false;
1197
1198 if ((IS_HASWELL(dev) && !IS_HSW_ULX(dev)) || IS_BROADWELL(dev) ||
1199 (INTEL_INFO(dev)->gen >= 9))
1200 return true;
1201 else
1202 return false;
1203}
1204
a8f3ef61 1205static int
1db10e28 1206intel_dp_source_rates(struct drm_device *dev, const int **source_rates)
a8f3ef61 1207{
af7080f5
TS		 1208 int size;
1209
64987fc5
SJ		 1210 if (IS_BROXTON(dev)) {
1211 *source_rates = bxt_rates;
af7080f5 1212 size = ARRAY_SIZE(bxt_rates);
ef11bdb3 1213 } else if (IS_SKYLAKE(dev) || IS_KABYLAKE(dev)) {
637a9c63 1214 *source_rates = skl_rates;
af7080f5
TS		 1215 size = ARRAY_SIZE(skl_rates);
1216 } else {
1217 *source_rates = default_rates;
1218 size = ARRAY_SIZE(default_rates);
a8f3ef61 1219 }
636280ba 1220
ed63baaf 1221 /* This depends on the fact that 5.4 is last value in the array */
af7080f5
TS		 1222 if (!intel_dp_source_supports_hbr2(dev))
1223 size--;
636280ba 1224
af7080f5 1225 return size;
a8f3ef61
SJ		 1226}
1227
c6bb3538
DV		 1228static void
1229intel_dp_set_clock(struct intel_encoder *encoder,
840b32b7 1230 struct intel_crtc_state *pipe_config)
c6bb3538
DV		 1231{
1232 struct drm_device *dev = encoder->base.dev;
9dd4ffdf
CML		 1233 const struct dp_link_dpll *divisor = NULL;
1234 int i, count = 0;
c6bb3538
DV		 1235
1236 if (IS_G4X(dev)) {
9dd4ffdf
CML		 1237 divisor = gen4_dpll;
1238 count = ARRAY_SIZE(gen4_dpll);
c6bb3538 1239 } else if (HAS_PCH_SPLIT(dev)) {
9dd4ffdf
CML		 1240 divisor = pch_dpll;
1241 count = ARRAY_SIZE(pch_dpll);
ef9348c8
CML		 1242 } else if (IS_CHERRYVIEW(dev)) {
1243 divisor = chv_dpll;
1244 count = ARRAY_SIZE(chv_dpll);
c6bb3538 1245 } else if (IS_VALLEYVIEW(dev)) {
65ce4bf5
CML		 1246 divisor = vlv_dpll;
1247 count = ARRAY_SIZE(vlv_dpll);
c6bb3538 1248 }
9dd4ffdf
CML		 1249
1250 if (divisor && count) {
1251 for (i = 0; i < count; i++) {
840b32b7 1252 if (pipe_config->port_clock == divisor[i].clock) {
9dd4ffdf
CML		 1253 pipe_config->dpll = divisor[i].dpll;
1254 pipe_config->clock_set = true;
1255 break;
1256 }
1257 }
c6bb3538
DV		 1258 }
1259}
1260
2ecae76a
VS		 1261static int intersect_rates(const int *source_rates, int source_len,
1262 const int *sink_rates, int sink_len,
94ca719e 1263 int *common_rates)
a8f3ef61
SJ		 1264{
1265 int i = 0, j = 0, k = 0;
1266
a8f3ef61
SJ		 1267 while (i < source_len && j < sink_len) {
1268 if (source_rates[i] == sink_rates[j]) {
e6bda3e4
VS		 1269 if (WARN_ON(k >= DP_MAX_SUPPORTED_RATES))
1270 return k;
94ca719e 1271 common_rates[k] = source_rates[i];
a8f3ef61
SJ		 1272 ++k;
1273 ++i;
1274 ++j;
1275 } else if (source_rates[i] < sink_rates[j]) {
1276 ++i;
1277 } else {
1278 ++j;
1279 }
1280 }
1281 return k;
1282}
1283
94ca719e
VS		 1284static int intel_dp_common_rates(struct intel_dp *intel_dp,
1285 int *common_rates)
2ecae76a
VS		 1286{
1287 struct drm_device *dev = intel_dp_to_dev(intel_dp);
1288 const int *source_rates, *sink_rates;
1289 int source_len, sink_len;
1290
1291 sink_len = intel_dp_sink_rates(intel_dp, &sink_rates);
1292 source_len = intel_dp_source_rates(dev, &source_rates);
1293
1294 return intersect_rates(source_rates, source_len,
1295 sink_rates, sink_len,
94ca719e 1296 common_rates);
2ecae76a
VS		 1297}
1298
0336400e
VS		 1299static void snprintf_int_array(char *str, size_t len,
1300 const int *array, int nelem)
1301{
1302 int i;
1303
1304 str[0] = '\0';
1305
1306 for (i = 0; i < nelem; i++) {
b2f505be 1307 int r = snprintf(str, len, "%s%d", i ? ", " : "", array[i]);
0336400e
VS		 1308 if (r >= len)
1309 return;
1310 str += r;
1311 len -= r;
1312 }
1313}
1314
1315static void intel_dp_print_rates(struct intel_dp *intel_dp)
1316{
1317 struct drm_device *dev = intel_dp_to_dev(intel_dp);
1318 const int *source_rates, *sink_rates;
94ca719e
VS		 1319 int source_len, sink_len, common_len;
1320 int common_rates[DP_MAX_SUPPORTED_RATES];
0336400e
VS		 1321 char str[128]; /* FIXME: too big for stack? */
1322
1323 if ((drm_debug & DRM_UT_KMS) == 0)
1324 return;
1325
1326 source_len = intel_dp_source_rates(dev, &source_rates);
1327 snprintf_int_array(str, sizeof(str), source_rates, source_len);
1328 DRM_DEBUG_KMS("source rates: %s\n", str);
1329
1330 sink_len = intel_dp_sink_rates(intel_dp, &sink_rates);
1331 snprintf_int_array(str, sizeof(str), sink_rates, sink_len);
1332 DRM_DEBUG_KMS("sink rates: %s\n", str);
1333
94ca719e
VS		 1334 common_len = intel_dp_common_rates(intel_dp, common_rates);
1335 snprintf_int_array(str, sizeof(str), common_rates, common_len);
1336 DRM_DEBUG_KMS("common rates: %s\n", str);
0336400e
VS		 1337}
1338
f4896f15 1339static int rate_to_index(int find, const int *rates)
a8f3ef61
SJ		 1340{
1341 int i = 0;
1342
1343 for (i = 0; i < DP_MAX_SUPPORTED_RATES; ++i)
1344 if (find == rates[i])
1345 break;
1346
1347 return i;
1348}
1349
50fec21a
VS		 1350int
1351intel_dp_max_link_rate(struct intel_dp *intel_dp)
1352{
1353 int rates[DP_MAX_SUPPORTED_RATES] = {};
1354 int len;
1355
94ca719e 1356 len = intel_dp_common_rates(intel_dp, rates);
50fec21a
VS		 1357 if (WARN_ON(len <= 0))
1358 return 162000;
1359
1360 return rates[rate_to_index(0, rates) - 1];
1361}
1362
ed4e9c1d
VS		 1363int intel_dp_rate_select(struct intel_dp *intel_dp, int rate)
1364{
94ca719e 1365 return rate_to_index(rate, intel_dp->sink_rates);
ed4e9c1d
VS		 1366}
1367
94223d04
ACO		 1368void intel_dp_compute_rate(struct intel_dp *intel_dp, int port_clock,
1369 uint8_t *link_bw, uint8_t *rate_select)
04a60f9f
VS		 1370{
1371 if (intel_dp->num_sink_rates) {
1372 *link_bw = 0;
1373 *rate_select =
1374 intel_dp_rate_select(intel_dp, port_clock);
1375 } else {
1376 *link_bw = drm_dp_link_rate_to_bw_code(port_clock);
1377 *rate_select = 0;
1378 }
1379}
1380
00c09d70 1381bool
5bfe2ac0 1382intel_dp_compute_config(struct intel_encoder *encoder,
5cec258b 1383 struct intel_crtc_state *pipe_config)
a4fc5ed6 1384{
5bfe2ac0 1385 struct drm_device *dev = encoder->base.dev;
36008365 1386 struct drm_i915_private *dev_priv = dev->dev_private;
2d112de7 1387 struct drm_display_mode *adjusted_mode = &pipe_config->base.adjusted_mode;
5bfe2ac0 1388 struct intel_dp *intel_dp = enc_to_intel_dp(&encoder->base);
bc7d38a4 1389 enum port port = dp_to_dig_port(intel_dp)->port;
84556d58 1390 struct intel_crtc *intel_crtc = to_intel_crtc(pipe_config->base.crtc);
dd06f90e 1391 struct intel_connector *intel_connector = intel_dp->attached_connector;
a4fc5ed6 1392 int lane_count, clock;
56071a20 1393 int min_lane_count = 1;
eeb6324d 1394 int max_lane_count = intel_dp_max_lane_count(intel_dp);
06ea66b6 1395 /* Conveniently, the link BW constants become indices with a shift...*/
56071a20 1396 int min_clock = 0;
a8f3ef61 1397 int max_clock;
083f9560 1398 int bpp, mode_rate;
ff9a6750 1399 int link_avail, link_clock;
94ca719e
VS		 1400 int common_rates[DP_MAX_SUPPORTED_RATES] = {};
1401 int common_len;
04a60f9f 1402 uint8_t link_bw, rate_select;
a8f3ef61 1403
94ca719e 1404 common_len = intel_dp_common_rates(intel_dp, common_rates);
a8f3ef61
SJ		 1405
1406 /* No common link rates between source and sink */
94ca719e 1407 WARN_ON(common_len <= 0);
a8f3ef61 1408
94ca719e 1409 max_clock = common_len - 1;
a4fc5ed6 1410
bc7d38a4 1411 if (HAS_PCH_SPLIT(dev) && !HAS_DDI(dev) && port != PORT_A)
5bfe2ac0
DV		 1412 pipe_config->has_pch_encoder = true;
1413
03afc4a2 1414 pipe_config->has_dp_encoder = true;
f769cd24 1415 pipe_config->has_drrs = false;
9fcb1704 1416 pipe_config->has_audio = intel_dp->has_audio && port != PORT_A;
a4fc5ed6 1417
dd06f90e
JN		 1418 if (is_edp(intel_dp) && intel_connector->panel.fixed_mode) {
1419 intel_fixed_panel_mode(intel_connector->panel.fixed_mode,
1420 adjusted_mode);
a1b2278e
CK		 1421
1422 if (INTEL_INFO(dev)->gen >= 9) {
1423 int ret;
e435d6e5 1424 ret = skl_update_scaler_crtc(pipe_config);
a1b2278e
CK		 1425 if (ret)
1426 return ret;
1427 }
1428
b5667627 1429 if (HAS_GMCH_DISPLAY(dev))
2dd24552
JB		 1430 intel_gmch_panel_fitting(intel_crtc, pipe_config,
1431 intel_connector->panel.fitting_mode);
1432 else
b074cec8
JB		 1433 intel_pch_panel_fitting(intel_crtc, pipe_config,
1434 intel_connector->panel.fitting_mode);
0d3a1bee
ZY		 1435 }
1436
cb1793ce 1437 if (adjusted_mode->flags & DRM_MODE_FLAG_DBLCLK)
0af78a2b
DV		 1438 return false;
1439
083f9560 1440 DRM_DEBUG_KMS("DP link computation with max lane count %i "
a8f3ef61 1441 "max bw %d pixel clock %iKHz\n",
94ca719e 1442 max_lane_count, common_rates[max_clock],
241bfc38 1443 adjusted_mode->crtc_clock);
083f9560 1444
36008365
DV		 1445 /* Walk through all bpp values. Luckily they're all nicely spaced with 2
1446 * bpc in between. */
3e7ca985 1447 bpp = pipe_config->pipe_bpp;
56071a20 1448 if (is_edp(intel_dp)) {
22ce5628
TS		 1449
1450 /* Get bpp from vbt only for panels that dont have bpp in edid */
1451 if (intel_connector->base.display_info.bpc == 0 &&
1452 (dev_priv->vbt.edp_bpp && dev_priv->vbt.edp_bpp < bpp)) {
56071a20
JN		 1453 DRM_DEBUG_KMS("clamping bpp for eDP panel to BIOS-provided %i\n",
1454 dev_priv->vbt.edp_bpp);
1455 bpp = dev_priv->vbt.edp_bpp;
1456 }
1457
344c5bbc
JN		 1458 /*
1459 * Use the maximum clock and number of lanes the eDP panel
1460 * advertizes being capable of. The panels are generally
1461 * designed to support only a single clock and lane
1462 * configuration, and typically these values correspond to the
1463 * native resolution of the panel.
1464 */
1465 min_lane_count = max_lane_count;
1466 min_clock = max_clock;
7984211e 1467 }
657445fe 1468
36008365 1469 for (; bpp >= 6*3; bpp -= 2*3) {
241bfc38
DL		 1470 mode_rate = intel_dp_link_required(adjusted_mode->crtc_clock,
1471 bpp);
36008365 1472
c6930992 1473 for (clock = min_clock; clock <= max_clock; clock++) {
a8f3ef61
SJ		 1474 for (lane_count = min_lane_count;
1475 lane_count <= max_lane_count;
1476 lane_count <<= 1) {
1477
94ca719e 1478 link_clock = common_rates[clock];
36008365
DV		 1479 link_avail = intel_dp_max_data_rate(link_clock,
1480 lane_count);
1481
1482 if (mode_rate <= link_avail) {
1483 goto found;
1484 }
1485 }
1486 }
1487 }
c4867936 1488
36008365 1489 return false;
3685a8f3 1490
36008365 1491found:
55bc60db
VS		 1492 if (intel_dp->color_range_auto) {
1493 /*
1494 * See:
1495 * CEA-861-E - 5.1 Default Encoding Parameters
1496 * VESA DisplayPort Ver.1.2a - 5.1.1.1 Video Colorimetry
1497 */
0f2a2a75
VS		 1498 pipe_config->limited_color_range =
1499 bpp != 18 && drm_match_cea_mode(adjusted_mode) > 1;
1500 } else {
1501 pipe_config->limited_color_range =
1502 intel_dp->limited_color_range;
55bc60db
VS		 1503 }
1504
90a6b7b0 1505 pipe_config->lane_count = lane_count;
a8f3ef61 1506
657445fe 1507 pipe_config->pipe_bpp = bpp;
94ca719e 1508 pipe_config->port_clock = common_rates[clock];
a4fc5ed6 1509
04a60f9f
VS		 1510 intel_dp_compute_rate(intel_dp, pipe_config->port_clock,
1511 &link_bw, &rate_select);
1512
1513 DRM_DEBUG_KMS("DP link bw %02x rate select %02x lane count %d clock %d bpp %d\n",
1514 link_bw, rate_select, pipe_config->lane_count,
ff9a6750 1515 pipe_config->port_clock, bpp);
36008365
DV		 1516 DRM_DEBUG_KMS("DP link bw required %i available %i\n",
1517 mode_rate, link_avail);
a4fc5ed6 1518
03afc4a2 1519 intel_link_compute_m_n(bpp, lane_count,
241bfc38
DL		 1520 adjusted_mode->crtc_clock,
1521 pipe_config->port_clock,
03afc4a2 1522 &pipe_config->dp_m_n);
9d1a455b 1523
439d7ac0 1524 if (intel_connector->panel.downclock_mode != NULL &&
96178eeb 1525 dev_priv->drrs.type == SEAMLESS_DRRS_SUPPORT) {
f769cd24 1526 pipe_config->has_drrs = true;
439d7ac0
PB		 1527 intel_link_compute_m_n(bpp, lane_count,
1528 intel_connector->panel.downclock_mode->clock,
1529 pipe_config->port_clock,
1530 &pipe_config->dp_m2_n2);
1531 }
1532
ef11bdb3 1533 if ((IS_SKYLAKE(dev) || IS_KABYLAKE(dev)) && is_edp(intel_dp))
840b32b7 1534 skl_edp_set_pll_config(pipe_config);
977bb38d
S		 1535 else if (IS_BROXTON(dev))
1536 /* handled in ddi */;
5416d871 1537 else if (IS_HASWELL(dev) || IS_BROADWELL(dev))
840b32b7 1538 hsw_dp_set_ddi_pll_sel(pipe_config);
0e50338c 1539 else
840b32b7 1540 intel_dp_set_clock(encoder, pipe_config);
c6bb3538 1541
03afc4a2 1542 return true;
a4fc5ed6
KP		 1543}
1544
7c62a164 1545static void ironlake_set_pll_cpu_edp(struct intel_dp *intel_dp)
ea9b6006 1546{
7c62a164
DV		 1547 struct intel_digital_port *dig_port = dp_to_dig_port(intel_dp);
1548 struct intel_crtc *crtc = to_intel_crtc(dig_port->base.base.crtc);
1549 struct drm_device *dev = crtc->base.dev;
ea9b6006
DV		 1550 struct drm_i915_private *dev_priv = dev->dev_private;
1551 u32 dpa_ctl;
1552
6e3c9717
ACO		 1553 DRM_DEBUG_KMS("eDP PLL enable for clock %d\n",
1554 crtc->config->port_clock);
ea9b6006
DV		 1555 dpa_ctl = I915_READ(DP_A);
1556 dpa_ctl &= ~DP_PLL_FREQ_MASK;
1557
6e3c9717 1558 if (crtc->config->port_clock == 162000) {
1ce17038
DV		 1559 /* For a long time we've carried around a ILK-DevA w/a for the
1560 * 160MHz clock. If we're really unlucky, it's still required.
1561 */
1562 DRM_DEBUG_KMS("160MHz cpu eDP clock, might need ilk devA w/a\n");
ea9b6006 1563 dpa_ctl |= DP_PLL_FREQ_160MHZ;
7c62a164 1564 intel_dp->DP |= DP_PLL_FREQ_160MHZ;
ea9b6006
DV		 1565 } else {
1566 dpa_ctl |= DP_PLL_FREQ_270MHZ;
7c62a164 1567 intel_dp->DP |= DP_PLL_FREQ_270MHZ;
ea9b6006 1568 }
1ce17038 1569
ea9b6006
DV		 1570 I915_WRITE(DP_A, dpa_ctl);
1571
1572 POSTING_READ(DP_A);
1573 udelay(500);
1574}
1575
901c2daf
VS		 1576void intel_dp_set_link_params(struct intel_dp *intel_dp,
1577 const struct intel_crtc_state *pipe_config)
1578{
1579 intel_dp->link_rate = pipe_config->port_clock;
1580 intel_dp->lane_count = pipe_config->lane_count;
1581}
1582
8ac33ed3 1583static void intel_dp_prepare(struct intel_encoder *encoder)
a4fc5ed6 1584{
b934223d 1585 struct drm_device *dev = encoder->base.dev;
417e822d 1586 struct drm_i915_private *dev_priv = dev->dev_private;
b934223d 1587 struct intel_dp *intel_dp = enc_to_intel_dp(&encoder->base);
bc7d38a4 1588 enum port port = dp_to_dig_port(intel_dp)->port;
b934223d 1589 struct intel_crtc *crtc = to_intel_crtc(encoder->base.crtc);
7c5f93b0 1590 const struct drm_display_mode *adjusted_mode = &crtc->config->base.adjusted_mode;
a4fc5ed6 1591
901c2daf
VS		 1592 intel_dp_set_link_params(intel_dp, crtc->config);
1593
417e822d 1594 /*
1a2eb460 1595 * There are four kinds of DP registers:
417e822d
KP		 1596 *
1597 * IBX PCH
1a2eb460
KP		 1598 * SNB CPU
1599 * IVB CPU
417e822d
KP		 1600 * CPT PCH
1601 *
1602 * IBX PCH and CPU are the same for almost everything,
1603 * except that the CPU DP PLL is configured in this
1604 * register
1605 *
1606 * CPT PCH is quite different, having many bits moved
1607 * to the TRANS_DP_CTL register instead. That
1608 * configuration happens (oddly) in ironlake_pch_enable
1609 */
9c9e7927 1610
417e822d
KP		 1611 /* Preserve the BIOS-computed detected bit. This is
1612 * supposed to be read-only.
1613 */
1614 intel_dp->DP = I915_READ(intel_dp->output_reg) & DP_DETECTED;
a4fc5ed6 1615
417e822d 1616 /* Handle DP bits in common between all three register formats */
417e822d 1617 intel_dp->DP |= DP_VOLTAGE_0_4 | DP_PRE_EMPHASIS_0;
90a6b7b0 1618 intel_dp->DP |= DP_PORT_WIDTH(crtc->config->lane_count);
a4fc5ed6 1619
6e3c9717 1620 if (crtc->config->has_audio)
ea5b213a 1621 intel_dp->DP |= DP_AUDIO_OUTPUT_ENABLE;
247d89f6 1622
417e822d 1623 /* Split out the IBX/CPU vs CPT settings */
32f9d658 1624
39e5fa88 1625 if (IS_GEN7(dev) && port == PORT_A) {
1a2eb460
KP		 1626 if (adjusted_mode->flags & DRM_MODE_FLAG_PHSYNC)
1627 intel_dp->DP |= DP_SYNC_HS_HIGH;
1628 if (adjusted_mode->flags & DRM_MODE_FLAG_PVSYNC)
1629 intel_dp->DP |= DP_SYNC_VS_HIGH;
1630 intel_dp->DP |= DP_LINK_TRAIN_OFF_CPT;
1631
6aba5b6c 1632 if (drm_dp_enhanced_frame_cap(intel_dp->dpcd))
1a2eb460
KP		 1633 intel_dp->DP |= DP_ENHANCED_FRAMING;
1634
7c62a164 1635 intel_dp->DP |= crtc->pipe << 29;
39e5fa88 1636 } else if (HAS_PCH_CPT(dev) && port != PORT_A) {
e3ef4479
VS		 1637 u32 trans_dp;
1638
39e5fa88 1639 intel_dp->DP |= DP_LINK_TRAIN_OFF_CPT;
e3ef4479
VS		 1640
1641 trans_dp = I915_READ(TRANS_DP_CTL(crtc->pipe));
1642 if (drm_dp_enhanced_frame_cap(intel_dp->dpcd))
1643 trans_dp |= TRANS_DP_ENH_FRAMING;
1644 else
1645 trans_dp &= ~TRANS_DP_ENH_FRAMING;
1646 I915_WRITE(TRANS_DP_CTL(crtc->pipe), trans_dp);
39e5fa88 1647 } else {
0f2a2a75
VS		 1648 if (!HAS_PCH_SPLIT(dev) && !IS_VALLEYVIEW(dev) &&
1649 crtc->config->limited_color_range)
1650 intel_dp->DP |= DP_COLOR_RANGE_16_235;
417e822d
KP		 1651
1652 if (adjusted_mode->flags & DRM_MODE_FLAG_PHSYNC)
1653 intel_dp->DP |= DP_SYNC_HS_HIGH;
1654 if (adjusted_mode->flags & DRM_MODE_FLAG_PVSYNC)
1655 intel_dp->DP |= DP_SYNC_VS_HIGH;
1656 intel_dp->DP |= DP_LINK_TRAIN_OFF;
1657
6aba5b6c 1658 if (drm_dp_enhanced_frame_cap(intel_dp->dpcd))
417e822d
KP		 1659 intel_dp->DP |= DP_ENHANCED_FRAMING;
1660
39e5fa88 1661 if (IS_CHERRYVIEW(dev))
44f37d1f 1662 intel_dp->DP |= DP_PIPE_SELECT_CHV(crtc->pipe);
39e5fa88
VS		 1663 else if (crtc->pipe == PIPE_B)
1664 intel_dp->DP |= DP_PIPEB_SELECT;
32f9d658 1665 }
a4fc5ed6
KP		 1666}
1667
ffd6749d
PZ		 1668#define IDLE_ON_MASK (PP_ON | PP_SEQUENCE_MASK | 0 | PP_SEQUENCE_STATE_MASK)
1669#define IDLE_ON_VALUE (PP_ON | PP_SEQUENCE_NONE | 0 | PP_SEQUENCE_STATE_ON_IDLE)
99ea7127 1670
1a5ef5b7
PZ		 1671#define IDLE_OFF_MASK (PP_ON | PP_SEQUENCE_MASK | 0 | 0)
1672#define IDLE_OFF_VALUE (0 | PP_SEQUENCE_NONE | 0 | 0)
99ea7127 1673
ffd6749d
PZ		 1674#define IDLE_CYCLE_MASK (PP_ON | PP_SEQUENCE_MASK | PP_CYCLE_DELAY_ACTIVE | PP_SEQUENCE_STATE_MASK)
1675#define IDLE_CYCLE_VALUE (0 | PP_SEQUENCE_NONE | 0 | PP_SEQUENCE_STATE_OFF_IDLE)
99ea7127 1676
4be73780 1677static void wait_panel_status(struct intel_dp *intel_dp,
99ea7127
KP		 1678 u32 mask,
1679 u32 value)
bd943159 1680{
30add22d 1681 struct drm_device *dev = intel_dp_to_dev(intel_dp);
99ea7127 1682 struct drm_i915_private *dev_priv = dev->dev_private;
453c5420
JB		 1683 u32 pp_stat_reg, pp_ctrl_reg;
1684
e39b999a
VS		 1685 lockdep_assert_held(&dev_priv->pps_mutex);
1686
bf13e81b
JN		 1687 pp_stat_reg = _pp_stat_reg(intel_dp);
1688 pp_ctrl_reg = _pp_ctrl_reg(intel_dp);
32ce697c 1689
99ea7127 1690 DRM_DEBUG_KMS("mask %08x value %08x status %08x control %08x\n",
453c5420
JB		 1691 mask, value,
1692 I915_READ(pp_stat_reg),
1693 I915_READ(pp_ctrl_reg));
32ce697c 1694
453c5420 1695 if (_wait_for((I915_READ(pp_stat_reg) & mask) == value, 5000, 10)) {
99ea7127 1696 DRM_ERROR("Panel status timeout: status %08x control %08x\n",
453c5420
JB		 1697 I915_READ(pp_stat_reg),
1698 I915_READ(pp_ctrl_reg));
32ce697c 1699 }
54c136d4
CW		 1700
1701 DRM_DEBUG_KMS("Wait complete\n");
99ea7127 1702}
32ce697c 1703
4be73780 1704static void wait_panel_on(struct intel_dp *intel_dp)
99ea7127
KP		 1705{
1706 DRM_DEBUG_KMS("Wait for panel power on\n");
4be73780 1707 wait_panel_status(intel_dp, IDLE_ON_MASK, IDLE_ON_VALUE);
bd943159
KP		 1708}
1709
4be73780 1710static void wait_panel_off(struct intel_dp *intel_dp)
99ea7127
KP		 1711{
1712 DRM_DEBUG_KMS("Wait for panel power off time\n");
4be73780 1713 wait_panel_status(intel_dp, IDLE_OFF_MASK, IDLE_OFF_VALUE);
99ea7127
KP		 1714}
1715
4be73780 1716static void wait_panel_power_cycle(struct intel_dp *intel_dp)
99ea7127
KP		 1717{
1718 DRM_DEBUG_KMS("Wait for panel power cycle\n");
dce56b3c
PZ		 1719
1720 /* When we disable the VDD override bit last we have to do the manual
1721 * wait. */
1722 wait_remaining_ms_from_jiffies(intel_dp->last_power_cycle,
1723 intel_dp->panel_power_cycle_delay);
1724
4be73780 1725 wait_panel_status(intel_dp, IDLE_CYCLE_MASK, IDLE_CYCLE_VALUE);
99ea7127
KP		 1726}
1727
4be73780 1728static void wait_backlight_on(struct intel_dp *intel_dp)
dce56b3c
PZ		 1729{
1730 wait_remaining_ms_from_jiffies(intel_dp->last_power_on,
1731 intel_dp->backlight_on_delay);
1732}
1733
4be73780 1734static void edp_wait_backlight_off(struct intel_dp *intel_dp)
dce56b3c
PZ		 1735{
1736 wait_remaining_ms_from_jiffies(intel_dp->last_backlight_off,
1737 intel_dp->backlight_off_delay);
1738}
99ea7127 1739
832dd3c1
KP		 1740/* Read the current pp_control value, unlocking the register if it
1741 * is locked
1742 */
1743
453c5420 1744static u32 ironlake_get_pp_control(struct intel_dp *intel_dp)
832dd3c1 1745{
453c5420
JB		 1746 struct drm_device *dev = intel_dp_to_dev(intel_dp);
1747 struct drm_i915_private *dev_priv = dev->dev_private;
1748 u32 control;
832dd3c1 1749
e39b999a
VS		 1750 lockdep_assert_held(&dev_priv->pps_mutex);
1751
bf13e81b 1752 control = I915_READ(_pp_ctrl_reg(intel_dp));
b0a08bec
VK		 1753 if (!IS_BROXTON(dev)) {
1754 control &= ~PANEL_UNLOCK_MASK;
1755 control |= PANEL_UNLOCK_REGS;
1756 }
832dd3c1 1757 return control;
bd943159
KP		 1758}
1759
951468f3
VS		 1760/*
1761 * Must be paired with edp_panel_vdd_off().
1762 * Must hold pps_mutex around the whole on/off sequence.
1763 * Can be nested with intel_edp_panel_vdd_{on,off}() calls.
1764 */
1e0560e0 1765static bool edp_panel_vdd_on(struct intel_dp *intel_dp)
5d613501 1766{
30add22d 1767 struct drm_device *dev = intel_dp_to_dev(intel_dp);
4e6e1a54
ID		 1768 struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp);
1769 struct intel_encoder *intel_encoder = &intel_dig_port->base;
5d613501 1770 struct drm_i915_private *dev_priv = dev->dev_private;
4e6e1a54 1771 enum intel_display_power_domain power_domain;
5d613501 1772 u32 pp;
453c5420 1773 u32 pp_stat_reg, pp_ctrl_reg;
adddaaf4 1774 bool need_to_disable = !intel_dp->want_panel_vdd;
5d613501 1775
e39b999a
VS		 1776 lockdep_assert_held(&dev_priv->pps_mutex);
1777
97af61f5 1778 if (!is_edp(intel_dp))
adddaaf4 1779 return false;
bd943159 1780
2c623c11 1781 cancel_delayed_work(&intel_dp->panel_vdd_work);
bd943159 1782 intel_dp->want_panel_vdd = true;
99ea7127 1783
4be73780 1784 if (edp_have_panel_vdd(intel_dp))
adddaaf4 1785 return need_to_disable;
b0665d57 1786
4e6e1a54
ID		 1787 power_domain = intel_display_port_power_domain(intel_encoder);
1788 intel_display_power_get(dev_priv, power_domain);
e9cb81a2 1789
3936fcf4
VS		 1790 DRM_DEBUG_KMS("Turning eDP port %c VDD on\n",
1791 port_name(intel_dig_port->port));
bd943159 1792
4be73780
DV		 1793 if (!edp_have_panel_power(intel_dp))
1794 wait_panel_power_cycle(intel_dp);
99ea7127 1795
453c5420 1796 pp = ironlake_get_pp_control(intel_dp);
5d613501 1797 pp |= EDP_FORCE_VDD;
ebf33b18 1798
bf13e81b
JN		 1799 pp_stat_reg = _pp_stat_reg(intel_dp);
1800 pp_ctrl_reg = _pp_ctrl_reg(intel_dp);
453c5420
JB		 1801
1802 I915_WRITE(pp_ctrl_reg, pp);
1803 POSTING_READ(pp_ctrl_reg);
1804 DRM_DEBUG_KMS("PP_STATUS: 0x%08x PP_CONTROL: 0x%08x\n",
1805 I915_READ(pp_stat_reg), I915_READ(pp_ctrl_reg));
ebf33b18
KP		 1806 /*
1807 * If the panel wasn't on, delay before accessing aux channel
1808 */
4be73780 1809 if (!edp_have_panel_power(intel_dp)) {
3936fcf4
VS		 1810 DRM_DEBUG_KMS("eDP port %c panel power wasn't enabled\n",
1811 port_name(intel_dig_port->port));
f01eca2e 1812 msleep(intel_dp->panel_power_up_delay);
f01eca2e 1813 }
adddaaf4
JN		 1814
1815 return need_to_disable;
1816}
1817
951468f3
VS		 1818/*
1819 * Must be paired with intel_edp_panel_vdd_off() or
1820 * intel_edp_panel_off().
1821 * Nested calls to these functions are not allowed since
1822 * we drop the lock. Caller must use some higher level
1823 * locking to prevent nested calls from other threads.
1824 */
b80d6c78 1825void intel_edp_panel_vdd_on(struct intel_dp *intel_dp)
adddaaf4 1826{
c695b6b6 1827 bool vdd;
adddaaf4 1828
c695b6b6
VS		 1829 if (!is_edp(intel_dp))
1830 return;
1831
773538e8 1832 pps_lock(intel_dp);
c695b6b6 1833 vdd = edp_panel_vdd_on(intel_dp);
773538e8 1834 pps_unlock(intel_dp);
c695b6b6 1835
e2c719b7 1836 I915_STATE_WARN(!vdd, "eDP port %c VDD already requested on\n",
3936fcf4 1837 port_name(dp_to_dig_port(intel_dp)->port));
5d613501
JB		 1838}
1839
4be73780 1840static void edp_panel_vdd_off_sync(struct intel_dp *intel_dp)
5d613501 1841{
30add22d 1842 struct drm_device *dev = intel_dp_to_dev(intel_dp);
5d613501 1843 struct drm_i915_private *dev_priv = dev->dev_private;
be2c9196
VS		 1844 struct intel_digital_port *intel_dig_port =
1845 dp_to_dig_port(intel_dp);
1846 struct intel_encoder *intel_encoder = &intel_dig_port->base;
1847 enum intel_display_power_domain power_domain;
5d613501 1848 u32 pp;
453c5420 1849 u32 pp_stat_reg, pp_ctrl_reg;
5d613501 1850
e39b999a 1851 lockdep_assert_held(&dev_priv->pps_mutex);
a0e99e68 1852
15e899a0 1853 WARN_ON(intel_dp->want_panel_vdd);
4e6e1a54 1854
15e899a0 1855 if (!edp_have_panel_vdd(intel_dp))
be2c9196 1856 return;
b0665d57 1857
3936fcf4
VS		 1858 DRM_DEBUG_KMS("Turning eDP port %c VDD off\n",
1859 port_name(intel_dig_port->port));
bd943159 1860
be2c9196
VS		 1861 pp = ironlake_get_pp_control(intel_dp);
1862 pp &= ~EDP_FORCE_VDD;
453c5420 1863
be2c9196
VS		 1864 pp_ctrl_reg = _pp_ctrl_reg(intel_dp);
1865 pp_stat_reg = _pp_stat_reg(intel_dp);
99ea7127 1866
be2c9196
VS		 1867 I915_WRITE(pp_ctrl_reg, pp);
1868 POSTING_READ(pp_ctrl_reg);
90791a5c 1869
be2c9196
VS		 1870 /* Make sure sequencer is idle before allowing subsequent activity */
1871 DRM_DEBUG_KMS("PP_STATUS: 0x%08x PP_CONTROL: 0x%08x\n",
1872 I915_READ(pp_stat_reg), I915_READ(pp_ctrl_reg));
e9cb81a2 1873
be2c9196
VS		 1874 if ((pp & POWER_TARGET_ON) == 0)
1875 intel_dp->last_power_cycle = jiffies;
e9cb81a2 1876
be2c9196
VS		 1877 power_domain = intel_display_port_power_domain(intel_encoder);
1878 intel_display_power_put(dev_priv, power_domain);
bd943159 1879}
5d613501 1880
4be73780 1881static void edp_panel_vdd_work(struct work_struct *__work)
bd943159
KP		 1882{
1883 struct intel_dp *intel_dp = container_of(to_delayed_work(__work),
1884 struct intel_dp, panel_vdd_work);
bd943159 1885
773538e8 1886 pps_lock(intel_dp);
15e899a0
VS		 1887 if (!intel_dp->want_panel_vdd)
1888 edp_panel_vdd_off_sync(intel_dp);
773538e8 1889 pps_unlock(intel_dp);
bd943159
KP		 1890}
1891
aba86890
ID		 1892static void edp_panel_vdd_schedule_off(struct intel_dp *intel_dp)
1893{
1894 unsigned long delay;
1895
1896 /*
1897 * Queue the timer to fire a long time from now (relative to the power
1898 * down delay) to keep the panel power up across a sequence of
1899 * operations.
1900 */
1901 delay = msecs_to_jiffies(intel_dp->panel_power_cycle_delay * 5);
1902 schedule_delayed_work(&intel_dp->panel_vdd_work, delay);
1903}
1904
951468f3
VS		 1905/*
1906 * Must be paired with edp_panel_vdd_on().
1907 * Must hold pps_mutex around the whole on/off sequence.
1908 * Can be nested with intel_edp_panel_vdd_{on,off}() calls.
1909 */
4be73780 1910static void edp_panel_vdd_off(struct intel_dp *intel_dp, bool sync)
bd943159 1911{
e39b999a
VS		 1912 struct drm_i915_private *dev_priv =
1913 intel_dp_to_dev(intel_dp)->dev_private;
1914
1915 lockdep_assert_held(&dev_priv->pps_mutex);
1916
97af61f5
KP		 1917 if (!is_edp(intel_dp))
1918 return;
5d613501 1919
e2c719b7 1920 I915_STATE_WARN(!intel_dp->want_panel_vdd, "eDP port %c VDD not forced on",
3936fcf4 1921 port_name(dp_to_dig_port(intel_dp)->port));
f2e8b18a 1922
bd943159
KP		 1923 intel_dp->want_panel_vdd = false;
1924
aba86890 1925 if (sync)
4be73780 1926 edp_panel_vdd_off_sync(intel_dp);
aba86890
ID		 1927 else
1928 edp_panel_vdd_schedule_off(intel_dp);
5d613501
JB		 1929}
1930
9f0fb5be 1931static void edp_panel_on(struct intel_dp *intel_dp)
9934c132 1932{
30add22d 1933 struct drm_device *dev = intel_dp_to_dev(intel_dp);
9934c132 1934 struct drm_i915_private *dev_priv = dev->dev_private;
99ea7127 1935 u32 pp;
453c5420 1936 u32 pp_ctrl_reg;
9934c132 1937
9f0fb5be
VS		 1938 lockdep_assert_held(&dev_priv->pps_mutex);
1939
97af61f5 1940 if (!is_edp(intel_dp))
bd943159 1941 return;
99ea7127 1942
3936fcf4
VS		 1943 DRM_DEBUG_KMS("Turn eDP port %c panel power on\n",
1944 port_name(dp_to_dig_port(intel_dp)->port));
e39b999a 1945
e7a89ace
VS		 1946 if (WARN(edp_have_panel_power(intel_dp),
1947 "eDP port %c panel power already on\n",
1948 port_name(dp_to_dig_port(intel_dp)->port)))
9f0fb5be 1949 return;
9934c132 1950
4be73780 1951 wait_panel_power_cycle(intel_dp);
37c6c9b0 1952
bf13e81b 1953 pp_ctrl_reg = _pp_ctrl_reg(intel_dp);
453c5420 1954 pp = ironlake_get_pp_control(intel_dp);
05ce1a49
KP		 1955 if (IS_GEN5(dev)) {
1956 /* ILK workaround: disable reset around power sequence */
1957 pp &= ~PANEL_POWER_RESET;
bf13e81b
JN		 1958 I915_WRITE(pp_ctrl_reg, pp);
1959 POSTING_READ(pp_ctrl_reg);
05ce1a49 1960 }
37c6c9b0 1961
1c0ae80a 1962 pp |= POWER_TARGET_ON;
99ea7127
KP		 1963 if (!IS_GEN5(dev))
1964 pp |= PANEL_POWER_RESET;
1965
453c5420
JB		 1966 I915_WRITE(pp_ctrl_reg, pp);
1967 POSTING_READ(pp_ctrl_reg);
9934c132 1968
4be73780 1969 wait_panel_on(intel_dp);
dce56b3c 1970 intel_dp->last_power_on = jiffies;
9934c132 1971
05ce1a49
KP		 1972 if (IS_GEN5(dev)) {
1973 pp |= PANEL_POWER_RESET; /* restore panel reset bit */
bf13e81b
JN		 1974 I915_WRITE(pp_ctrl_reg, pp);
1975 POSTING_READ(pp_ctrl_reg);
05ce1a49 1976 }
9f0fb5be 1977}
e39b999a 1978
9f0fb5be
VS		 1979void intel_edp_panel_on(struct intel_dp *intel_dp)
1980{
1981 if (!is_edp(intel_dp))
1982 return;
1983
1984 pps_lock(intel_dp);
1985 edp_panel_on(intel_dp);
773538e8 1986 pps_unlock(intel_dp);
9934c132
JB		 1987}
1988
9f0fb5be
VS		 1989
1990static void edp_panel_off(struct intel_dp *intel_dp)
9934c132 1991{
4e6e1a54
ID		 1992 struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp);
1993 struct intel_encoder *intel_encoder = &intel_dig_port->base;
30add22d 1994 struct drm_device *dev = intel_dp_to_dev(intel_dp);
9934c132 1995 struct drm_i915_private *dev_priv = dev->dev_private;
4e6e1a54 1996 enum intel_display_power_domain power_domain;
99ea7127 1997 u32 pp;
453c5420 1998 u32 pp_ctrl_reg;
9934c132 1999
9f0fb5be
VS		 2000 lockdep_assert_held(&dev_priv->pps_mutex);
2001
97af61f5
KP		 2002 if (!is_edp(intel_dp))
2003 return;
37c6c9b0 2004
3936fcf4
VS		 2005 DRM_DEBUG_KMS("Turn eDP port %c panel power off\n",
2006 port_name(dp_to_dig_port(intel_dp)->port));
37c6c9b0 2007
3936fcf4
VS		 2008 WARN(!intel_dp->want_panel_vdd, "Need eDP port %c VDD to turn off panel\n",
2009 port_name(dp_to_dig_port(intel_dp)->port));
24f3e092 2010
453c5420 2011 pp = ironlake_get_pp_control(intel_dp);
35a38556
DV		 2012 /* We need to switch off panel power _and_ force vdd, for otherwise some
2013 * panels get very unhappy and cease to work. */
b3064154
PJ		 2014 pp &= ~(POWER_TARGET_ON | PANEL_POWER_RESET | EDP_FORCE_VDD |
2015 EDP_BLC_ENABLE);
453c5420 2016
bf13e81b 2017 pp_ctrl_reg = _pp_ctrl_reg(intel_dp);
453c5420 2018
849e39f5
PZ		 2019 intel_dp->want_panel_vdd = false;
2020
453c5420
JB		 2021 I915_WRITE(pp_ctrl_reg, pp);
2022 POSTING_READ(pp_ctrl_reg);
9934c132 2023
dce56b3c 2024 intel_dp->last_power_cycle = jiffies;
4be73780 2025 wait_panel_off(intel_dp);
849e39f5
PZ		 2026
2027 /* We got a reference when we enabled the VDD. */
4e6e1a54
ID		 2028 power_domain = intel_display_port_power_domain(intel_encoder);
2029 intel_display_power_put(dev_priv, power_domain);
9f0fb5be 2030}
e39b999a 2031
9f0fb5be
VS		 2032void intel_edp_panel_off(struct intel_dp *intel_dp)
2033{
2034 if (!is_edp(intel_dp))
2035 return;
e39b999a 2036
9f0fb5be
VS		 2037 pps_lock(intel_dp);
2038 edp_panel_off(intel_dp);
773538e8 2039 pps_unlock(intel_dp);
9934c132
JB		 2040}
2041
1250d107
JN		 2042/* Enable backlight in the panel power control. */
2043static void _intel_edp_backlight_on(struct intel_dp *intel_dp)
32f9d658 2044{
da63a9f2
PZ		 2045 struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp);
2046 struct drm_device *dev = intel_dig_port->base.base.dev;
32f9d658
ZW		 2047 struct drm_i915_private *dev_priv = dev->dev_private;
2048 u32 pp;
453c5420 2049 u32 pp_ctrl_reg;
32f9d658 2050
01cb9ea6
JB		 2051 /*
2052 * If we enable the backlight right away following a panel power
2053 * on, we may see slight flicker as the panel syncs with the eDP
2054 * link. So delay a bit to make sure the image is solid before
2055 * allowing it to appear.
2056 */
4be73780 2057 wait_backlight_on(intel_dp);
e39b999a 2058
773538e8 2059 pps_lock(intel_dp);
e39b999a 2060
453c5420 2061 pp = ironlake_get_pp_control(intel_dp);
32f9d658 2062 pp |= EDP_BLC_ENABLE;
453c5420 2063
bf13e81b 2064 pp_ctrl_reg = _pp_ctrl_reg(intel_dp);
453c5420
JB		 2065
2066 I915_WRITE(pp_ctrl_reg, pp);
2067 POSTING_READ(pp_ctrl_reg);
e39b999a 2068
773538e8 2069 pps_unlock(intel_dp);
32f9d658
ZW		 2070}
2071
1250d107
JN		 2072/* Enable backlight PWM and backlight PP control. */
2073void intel_edp_backlight_on(struct intel_dp *intel_dp)
2074{
2075 if (!is_edp(intel_dp))
2076 return;
2077
2078 DRM_DEBUG_KMS("\n");
2079
2080 intel_panel_enable_backlight(intel_dp->attached_connector);
2081 _intel_edp_backlight_on(intel_dp);
2082}
2083
2084/* Disable backlight in the panel power control. */
2085static void _intel_edp_backlight_off(struct intel_dp *intel_dp)
32f9d658 2086{
30add22d 2087 struct drm_device *dev = intel_dp_to_dev(intel_dp);
32f9d658
ZW		 2088 struct drm_i915_private *dev_priv = dev->dev_private;
2089 u32 pp;
453c5420 2090 u32 pp_ctrl_reg;
32f9d658 2091
f01eca2e
KP		 2092 if (!is_edp(intel_dp))
2093 return;
2094
773538e8 2095 pps_lock(intel_dp);
e39b999a 2096
453c5420 2097 pp = ironlake_get_pp_control(intel_dp);
32f9d658 2098 pp &= ~EDP_BLC_ENABLE;
453c5420 2099
bf13e81b 2100 pp_ctrl_reg = _pp_ctrl_reg(intel_dp);
453c5420
JB		 2101
2102 I915_WRITE(pp_ctrl_reg, pp);
2103 POSTING_READ(pp_ctrl_reg);
f7d2323c 2104
773538e8 2105 pps_unlock(intel_dp);
e39b999a
VS		 2106
2107 intel_dp->last_backlight_off = jiffies;
f7d2323c 2108 edp_wait_backlight_off(intel_dp);
1250d107 2109}
f7d2323c 2110
1250d107
JN		 2111/* Disable backlight PP control and backlight PWM. */
2112void intel_edp_backlight_off(struct intel_dp *intel_dp)
2113{
2114 if (!is_edp(intel_dp))
2115 return;
2116
2117 DRM_DEBUG_KMS("\n");
f7d2323c 2118
1250d107 2119 _intel_edp_backlight_off(intel_dp);
f7d2323c 2120 intel_panel_disable_backlight(intel_dp->attached_connector);
32f9d658 2121}
a4fc5ed6 2122
73580fb7
JN		 2123/*
2124 * Hook for controlling the panel power control backlight through the bl_power
2125 * sysfs attribute. Take care to handle multiple calls.
2126 */
2127static void intel_edp_backlight_power(struct intel_connector *connector,
2128 bool enable)
2129{
2130 struct intel_dp *intel_dp = intel_attached_dp(&connector->base);
e39b999a
VS		 2131 bool is_enabled;
2132
773538e8 2133 pps_lock(intel_dp);
e39b999a 2134 is_enabled = ironlake_get_pp_control(intel_dp) & EDP_BLC_ENABLE;
773538e8 2135 pps_unlock(intel_dp);
73580fb7
JN		 2136
2137 if (is_enabled == enable)
2138 return;
2139
23ba9373
JN		 2140 DRM_DEBUG_KMS("panel power control backlight %s\n",
2141 enable ? "enable" : "disable");
73580fb7
JN		 2142
2143 if (enable)
2144 _intel_edp_backlight_on(intel_dp);
2145 else
2146 _intel_edp_backlight_off(intel_dp);
2147}
2148
2bd2ad64 2149static void ironlake_edp_pll_on(struct intel_dp *intel_dp)
d240f20f 2150{
da63a9f2
PZ		 2151 struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp);
2152 struct drm_crtc *crtc = intel_dig_port->base.base.crtc;
2153 struct drm_device *dev = crtc->dev;
d240f20f
JB		 2154 struct drm_i915_private *dev_priv = dev->dev_private;
2155 u32 dpa_ctl;
2156
2bd2ad64
DV		 2157 assert_pipe_disabled(dev_priv,
2158 to_intel_crtc(crtc)->pipe);
2159
d240f20f
JB		 2160 DRM_DEBUG_KMS("\n");
2161 dpa_ctl = I915_READ(DP_A);
0767935e
DV		 2162 WARN(dpa_ctl & DP_PLL_ENABLE, "dp pll on, should be off\n");
2163 WARN(dpa_ctl & DP_PORT_EN, "dp port still on, should be off\n");
2164
2165 /* We don't adjust intel_dp->DP while tearing down the link, to
2166 * facilitate link retraining (e.g. after hotplug). Hence clear all
2167 * enable bits here to ensure that we don't enable too much. */
2168 intel_dp->DP &= ~(DP_PORT_EN | DP_AUDIO_OUTPUT_ENABLE);
2169 intel_dp->DP |= DP_PLL_ENABLE;
2170 I915_WRITE(DP_A, intel_dp->DP);
298b0b39
JB		 2171 POSTING_READ(DP_A);
2172 udelay(200);
d240f20f
JB		 2173}
2174
2bd2ad64 2175static void ironlake_edp_pll_off(struct intel_dp *intel_dp)
d240f20f 2176{
da63a9f2
PZ		 2177 struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp);
2178 struct drm_crtc *crtc = intel_dig_port->base.base.crtc;
2179 struct drm_device *dev = crtc->dev;
d240f20f
JB		 2180 struct drm_i915_private *dev_priv = dev->dev_private;
2181 u32 dpa_ctl;
2182
2bd2ad64
DV		 2183 assert_pipe_disabled(dev_priv,
2184 to_intel_crtc(crtc)->pipe);
2185
d240f20f 2186 dpa_ctl = I915_READ(DP_A);
0767935e
DV		 2187 WARN((dpa_ctl & DP_PLL_ENABLE) == 0,
2188 "dp pll off, should be on\n");
2189 WARN(dpa_ctl & DP_PORT_EN, "dp port still on, should be off\n");
2190
2191 /* We can't rely on the value tracked for the DP register in
2192 * intel_dp->DP because link_down must not change that (otherwise link
2193 * re-training will fail. */
298b0b39 2194 dpa_ctl &= ~DP_PLL_ENABLE;
d240f20f 2195 I915_WRITE(DP_A, dpa_ctl);
1af5fa1b 2196 POSTING_READ(DP_A);
d240f20f
JB		 2197 udelay(200);
2198}
2199
c7ad3810 2200/* If the sink supports it, try to set the power state appropriately */
c19b0669 2201void intel_dp_sink_dpms(struct intel_dp *intel_dp, int mode)
c7ad3810
JB		 2202{
2203 int ret, i;
2204
2205 /* Should have a valid DPCD by this point */
2206 if (intel_dp->dpcd[DP_DPCD_REV] < 0x11)
2207 return;
2208
2209 if (mode != DRM_MODE_DPMS_ON) {
9d1a1031
JN		 2210 ret = drm_dp_dpcd_writeb(&intel_dp->aux, DP_SET_POWER,
2211 DP_SET_POWER_D3);
c7ad3810
JB		 2212 } else {
2213 /*
2214 * When turning on, we need to retry for 1ms to give the sink
2215 * time to wake up.
2216 */
2217 for (i = 0; i < 3; i++) {
9d1a1031
JN		 2218 ret = drm_dp_dpcd_writeb(&intel_dp->aux, DP_SET_POWER,
2219 DP_SET_POWER_D0);
c7ad3810
JB		 2220 if (ret == 1)
2221 break;
2222 msleep(1);
2223 }
2224 }
f9cac721
JN		 2225
2226 if (ret != 1)
2227 DRM_DEBUG_KMS("failed to %s sink power state\n",
2228 mode == DRM_MODE_DPMS_ON ? "enable" : "disable");
c7ad3810
JB		 2229}
2230
19d8fe15
DV		 2231static bool intel_dp_get_hw_state(struct intel_encoder *encoder,
2232 enum pipe *pipe)
d240f20f 2233{
19d8fe15 2234 struct intel_dp *intel_dp = enc_to_intel_dp(&encoder->base);
bc7d38a4 2235 enum port port = dp_to_dig_port(intel_dp)->port;
19d8fe15
DV		 2236 struct drm_device *dev = encoder->base.dev;
2237 struct drm_i915_private *dev_priv = dev->dev_private;
6d129bea
ID		 2238 enum intel_display_power_domain power_domain;
2239 u32 tmp;
2240
2241 power_domain = intel_display_port_power_domain(encoder);
f458ebbc 2242 if (!intel_display_power_is_enabled(dev_priv, power_domain))
6d129bea
ID		 2243 return false;
2244
2245 tmp = I915_READ(intel_dp->output_reg);
19d8fe15
DV		 2246
2247 if (!(tmp & DP_PORT_EN))
2248 return false;
2249
39e5fa88 2250 if (IS_GEN7(dev) && port == PORT_A) {
19d8fe15 2251 *pipe = PORT_TO_PIPE_CPT(tmp);
39e5fa88 2252 } else if (HAS_PCH_CPT(dev) && port != PORT_A) {
adc289d7 2253 enum pipe p;
19d8fe15 2254
adc289d7
VS		 2255 for_each_pipe(dev_priv, p) {
2256 u32 trans_dp = I915_READ(TRANS_DP_CTL(p));
2257 if (TRANS_DP_PIPE_TO_PORT(trans_dp) == port) {
2258 *pipe = p;
19d8fe15
DV		 2259 return true;
2260 }
2261 }
19d8fe15 2262
4a0833ec
DV		 2263 DRM_DEBUG_KMS("No pipe for dp port 0x%x found\n",
2264 intel_dp->output_reg);
39e5fa88
VS		 2265 } else if (IS_CHERRYVIEW(dev)) {
2266 *pipe = DP_PORT_TO_PIPE_CHV(tmp);
2267 } else {
2268 *pipe = PORT_TO_PIPE(tmp);
4a0833ec 2269 }
d240f20f 2270
19d8fe15
DV		 2271 return true;
2272}
d240f20f 2273
045ac3b5 2274static void intel_dp_get_config(struct intel_encoder *encoder,
5cec258b 2275 struct intel_crtc_state *pipe_config)
045ac3b5
JB		 2276{
2277 struct intel_dp *intel_dp = enc_to_intel_dp(&encoder->base);
045ac3b5 2278 u32 tmp, flags = 0;
63000ef6
XZ		 2279 struct drm_device *dev = encoder->base.dev;
2280 struct drm_i915_private *dev_priv = dev->dev_private;
2281 enum port port = dp_to_dig_port(intel_dp)->port;
2282 struct intel_crtc *crtc = to_intel_crtc(encoder->base.crtc);
18442d08 2283 int dotclock;
045ac3b5 2284
9ed109a7 2285 tmp = I915_READ(intel_dp->output_reg);
9fcb1704
JN		 2286
2287 pipe_config->has_audio = tmp & DP_AUDIO_OUTPUT_ENABLE && port != PORT_A;
9ed109a7 2288
39e5fa88 2289 if (HAS_PCH_CPT(dev) && port != PORT_A) {
b81e34c2
VS		 2290 u32 trans_dp = I915_READ(TRANS_DP_CTL(crtc->pipe));
2291
2292 if (trans_dp & TRANS_DP_HSYNC_ACTIVE_HIGH)
63000ef6
XZ		 2293 flags |= DRM_MODE_FLAG_PHSYNC;
2294 else
2295 flags |= DRM_MODE_FLAG_NHSYNC;
045ac3b5 2296
b81e34c2 2297 if (trans_dp & TRANS_DP_VSYNC_ACTIVE_HIGH)
63000ef6
XZ		 2298 flags |= DRM_MODE_FLAG_PVSYNC;
2299 else
2300 flags |= DRM_MODE_FLAG_NVSYNC;
2301 } else {
39e5fa88 2302 if (tmp & DP_SYNC_HS_HIGH)
63000ef6
XZ		 2303 flags |= DRM_MODE_FLAG_PHSYNC;
2304 else
2305 flags |= DRM_MODE_FLAG_NHSYNC;
045ac3b5 2306
39e5fa88 2307 if (tmp & DP_SYNC_VS_HIGH)
63000ef6
XZ		 2308 flags |= DRM_MODE_FLAG_PVSYNC;
2309 else
2310 flags |= DRM_MODE_FLAG_NVSYNC;
2311 }
045ac3b5 2312
2d112de7 2313 pipe_config->base.adjusted_mode.flags |= flags;
f1f644dc 2314
8c875fca
VS		 2315 if (!HAS_PCH_SPLIT(dev) && !IS_VALLEYVIEW(dev) &&
2316 tmp & DP_COLOR_RANGE_16_235)
2317 pipe_config->limited_color_range = true;
2318
eb14cb74
VS		 2319 pipe_config->has_dp_encoder = true;
2320
90a6b7b0
VS		 2321 pipe_config->lane_count =
2322 ((tmp & DP_PORT_WIDTH_MASK) >> DP_PORT_WIDTH_SHIFT) + 1;
2323
eb14cb74
VS		 2324 intel_dp_get_m_n(crtc, pipe_config);
2325
18442d08 2326 if (port == PORT_A) {
f1f644dc
JB		 2327 if ((I915_READ(DP_A) & DP_PLL_FREQ_MASK) == DP_PLL_FREQ_160MHZ)
2328 pipe_config->port_clock = 162000;
2329 else
2330 pipe_config->port_clock = 270000;
2331 }
18442d08
VS		 2332
2333 dotclock = intel_dotclock_calculate(pipe_config->port_clock,
2334 &pipe_config->dp_m_n);
2335
2336 if (HAS_PCH_SPLIT(dev_priv->dev) && port != PORT_A)
2337 ironlake_check_encoder_dotclock(pipe_config, dotclock);
2338
2d112de7 2339 pipe_config->base.adjusted_mode.crtc_clock = dotclock;
7f16e5c1 2340
c6cd2ee2
JN		 2341 if (is_edp(intel_dp) && dev_priv->vbt.edp_bpp &&
2342 pipe_config->pipe_bpp > dev_priv->vbt.edp_bpp) {
2343 /*
2344 * This is a big fat ugly hack.
2345 *
2346 * Some machines in UEFI boot mode provide us a VBT that has 18
2347 * bpp and 1.62 GHz link bandwidth for eDP, which for reasons
2348 * unknown we fail to light up. Yet the same BIOS boots up with
2349 * 24 bpp and 2.7 GHz link. Use the same bpp as the BIOS uses as
2350 * max, not what it tells us to use.
2351 *
2352 * Note: This will still be broken if the eDP panel is not lit
2353 * up by the BIOS, and thus we can't get the mode at module
2354 * load.
2355 */
2356 DRM_DEBUG_KMS("pipe has %d bpp for eDP panel, overriding BIOS-provided max %d bpp\n",
2357 pipe_config->pipe_bpp, dev_priv->vbt.edp_bpp);
2358 dev_priv->vbt.edp_bpp = pipe_config->pipe_bpp;
2359 }
045ac3b5
JB		 2360}
2361
e8cb4558 2362static void intel_disable_dp(struct intel_encoder *encoder)
d240f20f 2363{
e8cb4558 2364 struct intel_dp *intel_dp = enc_to_intel_dp(&encoder->base);
982a3866 2365 struct drm_device *dev = encoder->base.dev;
495a5bb8
JN		 2366 struct intel_crtc *crtc = to_intel_crtc(encoder->base.crtc);
2367
6e3c9717 2368 if (crtc->config->has_audio)
495a5bb8 2369 intel_audio_codec_disable(encoder);
6cb49835 2370
b32c6f48
RV		 2371 if (HAS_PSR(dev) && !HAS_DDI(dev))
2372 intel_psr_disable(intel_dp);
2373
6cb49835
DV		 2374 /* Make sure the panel is off before trying to change the mode. But also
2375 * ensure that we have vdd while we switch off the panel. */
24f3e092 2376 intel_edp_panel_vdd_on(intel_dp);
4be73780 2377 intel_edp_backlight_off(intel_dp);
fdbc3b1f 2378 intel_dp_sink_dpms(intel_dp, DRM_MODE_DPMS_OFF);
4be73780 2379 intel_edp_panel_off(intel_dp);
3739850b 2380
08aff3fe
VS		 2381 /* disable the port before the pipe on g4x */
2382 if (INTEL_INFO(dev)->gen < 5)
3739850b 2383 intel_dp_link_down(intel_dp);
d240f20f
JB		 2384}
2385
08aff3fe 2386static void ilk_post_disable_dp(struct intel_encoder *encoder)
d240f20f 2387{
2bd2ad64 2388 struct intel_dp *intel_dp = enc_to_intel_dp(&encoder->base);
982a3866 2389 enum port port = dp_to_dig_port(intel_dp)->port;
2bd2ad64 2390
49277c31 2391 intel_dp_link_down(intel_dp);
08aff3fe
VS		 2392 if (port == PORT_A)
2393 ironlake_edp_pll_off(intel_dp);
49277c31
VS		 2394}
2395
2396static void vlv_post_disable_dp(struct intel_encoder *encoder)
2397{
2398 struct intel_dp *intel_dp = enc_to_intel_dp(&encoder->base);
2399
2400 intel_dp_link_down(intel_dp);
2bd2ad64
DV		 2401}
2402
a8f327fb
VS		 2403static void chv_data_lane_soft_reset(struct intel_encoder *encoder,
2404 bool reset)
580d3811 2405{
a8f327fb
VS		 2406 struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
2407 enum dpio_channel ch = vlv_dport_to_channel(enc_to_dig_port(&encoder->base));
2408 struct intel_crtc *crtc = to_intel_crtc(encoder->base.crtc);
2409 enum pipe pipe = crtc->pipe;
2410 uint32_t val;
580d3811 2411
a8f327fb
VS		 2412 val = vlv_dpio_read(dev_priv, pipe, VLV_PCS01_DW0(ch));
2413 if (reset)
2414 val &= ~(DPIO_PCS_TX_LANE2_RESET | DPIO_PCS_TX_LANE1_RESET);
2415 else
2416 val |= DPIO_PCS_TX_LANE2_RESET | DPIO_PCS_TX_LANE1_RESET;
2417 vlv_dpio_write(dev_priv, pipe, VLV_PCS01_DW0(ch), val);
580d3811 2418
a8f327fb
VS		 2419 if (crtc->config->lane_count > 2) {
2420 val = vlv_dpio_read(dev_priv, pipe, VLV_PCS23_DW0(ch));
2421 if (reset)
2422 val &= ~(DPIO_PCS_TX_LANE2_RESET | DPIO_PCS_TX_LANE1_RESET);
2423 else
2424 val |= DPIO_PCS_TX_LANE2_RESET | DPIO_PCS_TX_LANE1_RESET;
2425 vlv_dpio_write(dev_priv, pipe, VLV_PCS23_DW0(ch), val);
2426 }
580d3811 2427
97fd4d5c 2428 val = vlv_dpio_read(dev_priv, pipe, VLV_PCS01_DW1(ch));
d2152b25 2429 val |= CHV_PCS_REQ_SOFTRESET_EN;
a8f327fb
VS		 2430 if (reset)
2431 val &= ~DPIO_PCS_CLK_SOFT_RESET;
2432 else
2433 val |= DPIO_PCS_CLK_SOFT_RESET;
97fd4d5c 2434 vlv_dpio_write(dev_priv, pipe, VLV_PCS01_DW1(ch), val);
d2152b25 2435
a8f327fb 2436 if (crtc->config->lane_count > 2) {
e0fce78f
VS		 2437 val = vlv_dpio_read(dev_priv, pipe, VLV_PCS23_DW1(ch));
2438 val |= CHV_PCS_REQ_SOFTRESET_EN;
a8f327fb
VS		 2439 if (reset)
2440 val &= ~DPIO_PCS_CLK_SOFT_RESET;
2441 else
2442 val |= DPIO_PCS_CLK_SOFT_RESET;
e0fce78f
VS		 2443 vlv_dpio_write(dev_priv, pipe, VLV_PCS23_DW1(ch), val);
2444 }
a8f327fb 2445}
97fd4d5c 2446
a8f327fb
VS		 2447static void chv_post_disable_dp(struct intel_encoder *encoder)
2448{
2449 struct intel_dp *intel_dp = enc_to_intel_dp(&encoder->base);
2450 struct drm_device *dev = encoder->base.dev;
2451 struct drm_i915_private *dev_priv = dev->dev_private;
97fd4d5c 2452
a8f327fb
VS		 2453 intel_dp_link_down(intel_dp);
2454
2455 mutex_lock(&dev_priv->sb_lock);
2456
2457 /* Assert data lane reset */
2458 chv_data_lane_soft_reset(encoder, true);
580d3811 2459
a580516d 2460 mutex_unlock(&dev_priv->sb_lock);
580d3811
VS		 2461}
2462
7b13b58a
VS		 2463static void
2464_intel_dp_set_link_train(struct intel_dp *intel_dp,
2465 uint32_t *DP,
2466 uint8_t dp_train_pat)
2467{
2468 struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp);
2469 struct drm_device *dev = intel_dig_port->base.base.dev;
2470 struct drm_i915_private *dev_priv = dev->dev_private;
2471 enum port port = intel_dig_port->port;
2472
2473 if (HAS_DDI(dev)) {
2474 uint32_t temp = I915_READ(DP_TP_CTL(port));
2475
2476 if (dp_train_pat & DP_LINK_SCRAMBLING_DISABLE)
2477 temp |= DP_TP_CTL_SCRAMBLE_DISABLE;
2478 else
2479 temp &= ~DP_TP_CTL_SCRAMBLE_DISABLE;
2480
2481 temp &= ~DP_TP_CTL_LINK_TRAIN_MASK;
2482 switch (dp_train_pat & DP_TRAINING_PATTERN_MASK) {
2483 case DP_TRAINING_PATTERN_DISABLE:
2484 temp |= DP_TP_CTL_LINK_TRAIN_NORMAL;
2485
2486 break;
2487 case DP_TRAINING_PATTERN_1:
2488 temp |= DP_TP_CTL_LINK_TRAIN_PAT1;
2489 break;
2490 case DP_TRAINING_PATTERN_2:
2491 temp |= DP_TP_CTL_LINK_TRAIN_PAT2;
2492 break;
2493 case DP_TRAINING_PATTERN_3:
2494 temp |= DP_TP_CTL_LINK_TRAIN_PAT3;
2495 break;
2496 }
2497 I915_WRITE(DP_TP_CTL(port), temp);
2498
39e5fa88
VS		 2499 } else if ((IS_GEN7(dev) && port == PORT_A) ||
2500 (HAS_PCH_CPT(dev) && port != PORT_A)) {
7b13b58a
VS		 2501 *DP &= ~DP_LINK_TRAIN_MASK_CPT;
2502
2503 switch (dp_train_pat & DP_TRAINING_PATTERN_MASK) {
2504 case DP_TRAINING_PATTERN_DISABLE:
2505 *DP |= DP_LINK_TRAIN_OFF_CPT;
2506 break;
2507 case DP_TRAINING_PATTERN_1:
2508 *DP |= DP_LINK_TRAIN_PAT_1_CPT;
2509 break;
2510 case DP_TRAINING_PATTERN_2:
2511 *DP |= DP_LINK_TRAIN_PAT_2_CPT;
2512 break;
2513 case DP_TRAINING_PATTERN_3:
2514 DRM_ERROR("DP training pattern 3 not supported\n");
2515 *DP |= DP_LINK_TRAIN_PAT_2_CPT;
2516 break;
2517 }
2518
2519 } else {
2520 if (IS_CHERRYVIEW(dev))
2521 *DP &= ~DP_LINK_TRAIN_MASK_CHV;
2522 else
2523 *DP &= ~DP_LINK_TRAIN_MASK;
2524
2525 switch (dp_train_pat & DP_TRAINING_PATTERN_MASK) {
2526 case DP_TRAINING_PATTERN_DISABLE:
2527 *DP |= DP_LINK_TRAIN_OFF;
2528 break;
2529 case DP_TRAINING_PATTERN_1:
2530 *DP |= DP_LINK_TRAIN_PAT_1;
2531 break;
2532 case DP_TRAINING_PATTERN_2:
2533 *DP |= DP_LINK_TRAIN_PAT_2;
2534 break;
2535 case DP_TRAINING_PATTERN_3:
2536 if (IS_CHERRYVIEW(dev)) {
2537 *DP |= DP_LINK_TRAIN_PAT_3_CHV;
2538 } else {
2539 DRM_ERROR("DP training pattern 3 not supported\n");
2540 *DP |= DP_LINK_TRAIN_PAT_2;
2541 }
2542 break;
2543 }
2544 }
2545}
2546
2547static void intel_dp_enable_port(struct intel_dp *intel_dp)
2548{
2549 struct drm_device *dev = intel_dp_to_dev(intel_dp);
2550 struct drm_i915_private *dev_priv = dev->dev_private;
2551
7b13b58a
VS		 2552 /* enable with pattern 1 (as per spec) */
2553 _intel_dp_set_link_train(intel_dp, &intel_dp->DP,
2554 DP_TRAINING_PATTERN_1);
2555
2556 I915_WRITE(intel_dp->output_reg, intel_dp->DP);
2557 POSTING_READ(intel_dp->output_reg);
7b713f50
VS		 2558
2559 /*
2560 * Magic for VLV/CHV. We _must_ first set up the register
2561 * without actually enabling the port, and then do another
2562 * write to enable the port. Otherwise link training will
2563 * fail when the power sequencer is freshly used for this port.
2564 */
2565 intel_dp->DP |= DP_PORT_EN;
2566
2567 I915_WRITE(intel_dp->output_reg, intel_dp->DP);
2568 POSTING_READ(intel_dp->output_reg);
580d3811
VS		 2569}
2570
e8cb4558 2571static void intel_enable_dp(struct intel_encoder *encoder)
d240f20f 2572{
e8cb4558
DV		 2573 struct intel_dp *intel_dp = enc_to_intel_dp(&encoder->base);
2574 struct drm_device *dev = encoder->base.dev;
2575 struct drm_i915_private *dev_priv = dev->dev_private;
c1dec79a 2576 struct intel_crtc *crtc = to_intel_crtc(encoder->base.crtc);
e8cb4558 2577 uint32_t dp_reg = I915_READ(intel_dp->output_reg);
5d613501 2578
0c33d8d7
DV		 2579 if (WARN_ON(dp_reg & DP_PORT_EN))
2580 return;
5d613501 2581
093e3f13
VS		 2582 pps_lock(intel_dp);
2583
2584 if (IS_VALLEYVIEW(dev))
2585 vlv_init_panel_power_sequencer(intel_dp);
2586
7b13b58a 2587 intel_dp_enable_port(intel_dp);
093e3f13
VS		 2588
2589 edp_panel_vdd_on(intel_dp);
2590 edp_panel_on(intel_dp);
2591 edp_panel_vdd_off(intel_dp, true);
2592
2593 pps_unlock(intel_dp);
2594
e0fce78f
VS		 2595 if (IS_VALLEYVIEW(dev)) {
2596 unsigned int lane_mask = 0x0;
2597
2598 if (IS_CHERRYVIEW(dev))
2599 lane_mask = intel_dp_unused_lane_mask(crtc->config->lane_count);
2600
9b6de0a1
VS		 2601 vlv_wait_port_ready(dev_priv, dp_to_dig_port(intel_dp),
2602 lane_mask);
e0fce78f 2603 }
61234fa5 2604
f01eca2e 2605 intel_dp_sink_dpms(intel_dp, DRM_MODE_DPMS_ON);
33a34e4e 2606 intel_dp_start_link_train(intel_dp);
3ab9c637 2607 intel_dp_stop_link_train(intel_dp);
c1dec79a 2608
6e3c9717 2609 if (crtc->config->has_audio) {
c1dec79a
JN		 2610 DRM_DEBUG_DRIVER("Enabling DP audio on pipe %c\n",
2611 pipe_name(crtc->pipe));
2612 intel_audio_codec_enable(encoder);
2613 }
ab1f90f9 2614}
89b667f8 2615
ecff4f3b
JN		 2616static void g4x_enable_dp(struct intel_encoder *encoder)
2617{
828f5c6e
JN		 2618 struct intel_dp *intel_dp = enc_to_intel_dp(&encoder->base);
2619
ecff4f3b 2620 intel_enable_dp(encoder);
4be73780 2621 intel_edp_backlight_on(intel_dp);
ab1f90f9 2622}
89b667f8 2623
ab1f90f9
JN		 2624static void vlv_enable_dp(struct intel_encoder *encoder)
2625{
828f5c6e
JN		 2626 struct intel_dp *intel_dp = enc_to_intel_dp(&encoder->base);
2627
4be73780 2628 intel_edp_backlight_on(intel_dp);
b32c6f48 2629 intel_psr_enable(intel_dp);
d240f20f
JB		 2630}
2631
ecff4f3b 2632static void g4x_pre_enable_dp(struct intel_encoder *encoder)
ab1f90f9
JN		 2633{
2634 struct intel_dp *intel_dp = enc_to_intel_dp(&encoder->base);
2635 struct intel_digital_port *dport = dp_to_dig_port(intel_dp);
2636
8ac33ed3
DV		 2637 intel_dp_prepare(encoder);
2638
d41f1efb
DV		 2639 /* Only ilk+ has port A */
2640 if (dport->port == PORT_A) {
2641 ironlake_set_pll_cpu_edp(intel_dp);
ab1f90f9 2642 ironlake_edp_pll_on(intel_dp);
d41f1efb 2643 }
ab1f90f9
JN		 2644}
2645
83b84597
VS		 2646static void vlv_detach_power_sequencer(struct intel_dp *intel_dp)
2647{
2648 struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp);
2649 struct drm_i915_private *dev_priv = intel_dig_port->base.base.dev->dev_private;
2650 enum pipe pipe = intel_dp->pps_pipe;
2651 int pp_on_reg = VLV_PIPE_PP_ON_DELAYS(pipe);
2652
2653 edp_panel_vdd_off_sync(intel_dp);
2654
2655 /*
2656 * VLV seems to get confused when multiple power seqeuencers
2657 * have the same port selected (even if only one has power/vdd
2658 * enabled). The failure manifests as vlv_wait_port_ready() failing
2659 * CHV on the other hand doesn't seem to mind having the same port
2660 * selected in multiple power seqeuencers, but let's clear the
2661 * port select always when logically disconnecting a power sequencer
2662 * from a port.
2663 */
2664 DRM_DEBUG_KMS("detaching pipe %c power sequencer from port %c\n",
2665 pipe_name(pipe), port_name(intel_dig_port->port));
2666 I915_WRITE(pp_on_reg, 0);
2667 POSTING_READ(pp_on_reg);
2668
2669 intel_dp->pps_pipe = INVALID_PIPE;
2670}
2671
a4a5d2f8
VS		 2672static void vlv_steal_power_sequencer(struct drm_device *dev,
2673 enum pipe pipe)
2674{
2675 struct drm_i915_private *dev_priv = dev->dev_private;
2676 struct intel_encoder *encoder;
2677
2678 lockdep_assert_held(&dev_priv->pps_mutex);
2679
ac3c12e4
VS		 2680 if (WARN_ON(pipe != PIPE_A && pipe != PIPE_B))
2681 return;
2682
a4a5d2f8
VS		 2683 list_for_each_entry(encoder, &dev->mode_config.encoder_list,
2684 base.head) {
2685 struct intel_dp *intel_dp;
773538e8 2686 enum port port;
a4a5d2f8
VS		 2687
2688 if (encoder->type != INTEL_OUTPUT_EDP)
2689 continue;
2690
2691 intel_dp = enc_to_intel_dp(&encoder->base);
773538e8 2692 port = dp_to_dig_port(intel_dp)->port;
a4a5d2f8
VS		 2693
2694 if (intel_dp->pps_pipe != pipe)
2695 continue;
2696
2697 DRM_DEBUG_KMS("stealing pipe %c power sequencer from port %c\n",
773538e8 2698 pipe_name(pipe), port_name(port));
a4a5d2f8 2699
e02f9a06 2700 WARN(encoder->base.crtc,
034e43c6
VS		 2701 "stealing pipe %c power sequencer from active eDP port %c\n",
2702 pipe_name(pipe), port_name(port));
a4a5d2f8 2703
a4a5d2f8 2704 /* make sure vdd is off before we steal it */
83b84597 2705 vlv_detach_power_sequencer(intel_dp);
a4a5d2f8
VS		 2706 }
2707}
2708
2709static void vlv_init_panel_power_sequencer(struct intel_dp *intel_dp)
2710{
2711 struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp);
2712 struct intel_encoder *encoder = &intel_dig_port->base;
2713 struct drm_device *dev = encoder->base.dev;
2714 struct drm_i915_private *dev_priv = dev->dev_private;
2715 struct intel_crtc *crtc = to_intel_crtc(encoder->base.crtc);
a4a5d2f8
VS		 2716
2717 lockdep_assert_held(&dev_priv->pps_mutex);
2718
093e3f13
VS		 2719 if (!is_edp(intel_dp))
2720 return;
2721
a4a5d2f8
VS		 2722 if (intel_dp->pps_pipe == crtc->pipe)
2723 return;
2724
2725 /*
2726 * If another power sequencer was being used on this
2727 * port previously make sure to turn off vdd there while
2728 * we still have control of it.
2729 */
2730 if (intel_dp->pps_pipe != INVALID_PIPE)
83b84597 2731 vlv_detach_power_sequencer(intel_dp);
a4a5d2f8
VS		 2732
2733 /*
2734 * We may be stealing the power
2735 * sequencer from another port.
2736 */
2737 vlv_steal_power_sequencer(dev, crtc->pipe);
2738
2739 /* now it's all ours */
2740 intel_dp->pps_pipe = crtc->pipe;
2741
2742 DRM_DEBUG_KMS("initializing pipe %c power sequencer for port %c\n",
2743 pipe_name(intel_dp->pps_pipe), port_name(intel_dig_port->port));
2744
2745 /* init power sequencer on this pipe and port */
36b5f425
VS		 2746 intel_dp_init_panel_power_sequencer(dev, intel_dp);
2747 intel_dp_init_panel_power_sequencer_registers(dev, intel_dp);
a4a5d2f8
VS		 2748}
2749
ab1f90f9 2750static void vlv_pre_enable_dp(struct intel_encoder *encoder)
a4fc5ed6 2751{
2bd2ad64 2752 struct intel_dp *intel_dp = enc_to_intel_dp(&encoder->base);
bc7d38a4 2753 struct intel_digital_port *dport = dp_to_dig_port(intel_dp);
b2634017 2754 struct drm_device *dev = encoder->base.dev;
89b667f8 2755 struct drm_i915_private *dev_priv = dev->dev_private;
ab1f90f9 2756 struct intel_crtc *intel_crtc = to_intel_crtc(encoder->base.crtc);
e4607fcf 2757 enum dpio_channel port = vlv_dport_to_channel(dport);
ab1f90f9
JN		 2758 int pipe = intel_crtc->pipe;
2759 u32 val;
a4fc5ed6 2760
a580516d 2761 mutex_lock(&dev_priv->sb_lock);
89b667f8 2762
ab3c759a 2763 val = vlv_dpio_read(dev_priv, pipe, VLV_PCS01_DW8(port));
ab1f90f9
JN		 2764 val = 0;
2765 if (pipe)
2766 val |= (1<<21);
2767 else
2768 val &= ~(1<<21);
2769 val |= 0x001000c4;
ab3c759a
CML		 2770 vlv_dpio_write(dev_priv, pipe, VLV_PCS_DW8(port), val);
2771 vlv_dpio_write(dev_priv, pipe, VLV_PCS_DW14(port), 0x00760018);
2772 vlv_dpio_write(dev_priv, pipe, VLV_PCS_DW23(port), 0x00400888);
89b667f8 2773
a580516d 2774 mutex_unlock(&dev_priv->sb_lock);
ab1f90f9
JN		 2775
2776 intel_enable_dp(encoder);
89b667f8
JB		 2777}
2778
ecff4f3b 2779static void vlv_dp_pre_pll_enable(struct intel_encoder *encoder)
89b667f8
JB		 2780{
2781 struct intel_digital_port *dport = enc_to_dig_port(&encoder->base);
2782 struct drm_device *dev = encoder->base.dev;
2783 struct drm_i915_private *dev_priv = dev->dev_private;
5e69f97f
CML		 2784 struct intel_crtc *intel_crtc =
2785 to_intel_crtc(encoder->base.crtc);
e4607fcf 2786 enum dpio_channel port = vlv_dport_to_channel(dport);
5e69f97f 2787 int pipe = intel_crtc->pipe;
89b667f8 2788
8ac33ed3
DV		 2789 intel_dp_prepare(encoder);
2790
89b667f8 2791 /* Program Tx lane resets to default */
a580516d 2792 mutex_lock(&dev_priv->sb_lock);
ab3c759a 2793 vlv_dpio_write(dev_priv, pipe, VLV_PCS_DW0(port),
89b667f8
JB		 2794 DPIO_PCS_TX_LANE2_RESET |
2795 DPIO_PCS_TX_LANE1_RESET);
ab3c759a 2796 vlv_dpio_write(dev_priv, pipe, VLV_PCS_DW1(port),
89b667f8
JB		 2797 DPIO_PCS_CLK_CRI_RXEB_EIOS_EN |
2798 DPIO_PCS_CLK_CRI_RXDIGFILTSG_EN |
2799 (1<<DPIO_PCS_CLK_DATAWIDTH_SHIFT) |
2800 DPIO_PCS_CLK_SOFT_RESET);
2801
2802 /* Fix up inter-pair skew failure */
ab3c759a
CML		 2803 vlv_dpio_write(dev_priv, pipe, VLV_PCS_DW12(port), 0x00750f00);
2804 vlv_dpio_write(dev_priv, pipe, VLV_TX_DW11(port), 0x00001500);
2805 vlv_dpio_write(dev_priv, pipe, VLV_TX_DW14(port), 0x40400000);
a580516d 2806 mutex_unlock(&dev_priv->sb_lock);
a4fc5ed6
KP		 2807}
2808
e4a1d846
CML		 2809static void chv_pre_enable_dp(struct intel_encoder *encoder)
2810{
2811 struct intel_dp *intel_dp = enc_to_intel_dp(&encoder->base);
2812 struct intel_digital_port *dport = dp_to_dig_port(intel_dp);
2813 struct drm_device *dev = encoder->base.dev;
2814 struct drm_i915_private *dev_priv = dev->dev_private;
e4a1d846
CML		 2815 struct intel_crtc *intel_crtc =
2816 to_intel_crtc(encoder->base.crtc);
2817 enum dpio_channel ch = vlv_dport_to_channel(dport);
2818 int pipe = intel_crtc->pipe;
2e523e98 2819 int data, i, stagger;
949c1d43 2820 u32 val;
e4a1d846 2821
a580516d 2822 mutex_lock(&dev_priv->sb_lock);
949c1d43 2823
570e2a74
VS		 2824 /* allow hardware to manage TX FIFO reset source */
2825 val = vlv_dpio_read(dev_priv, pipe, VLV_PCS01_DW11(ch));
2826 val &= ~DPIO_LANEDESKEW_STRAP_OVRD;
2827 vlv_dpio_write(dev_priv, pipe, VLV_PCS01_DW11(ch), val);
2828
e0fce78f
VS		 2829 if (intel_crtc->config->lane_count > 2) {
2830 val = vlv_dpio_read(dev_priv, pipe, VLV_PCS23_DW11(ch));
2831 val &= ~DPIO_LANEDESKEW_STRAP_OVRD;
2832 vlv_dpio_write(dev_priv, pipe, VLV_PCS23_DW11(ch), val);
2833 }
570e2a74 2834
949c1d43 2835 /* Program Tx lane latency optimal setting*/
e0fce78f 2836 for (i = 0; i < intel_crtc->config->lane_count; i++) {
e4a1d846 2837 /* Set the upar bit */
e0fce78f
VS		 2838 if (intel_crtc->config->lane_count == 1)
2839 data = 0x0;
2840 else
2841 data = (i == 1) ? 0x0 : 0x1;
e4a1d846
CML		 2842 vlv_dpio_write(dev_priv, pipe, CHV_TX_DW14(ch, i),
2843 data << DPIO_UPAR_SHIFT);
2844 }
2845
2846 /* Data lane stagger programming */
2e523e98
VS		 2847 if (intel_crtc->config->port_clock > 270000)
2848 stagger = 0x18;
2849 else if (intel_crtc->config->port_clock > 135000)
2850 stagger = 0xd;
2851 else if (intel_crtc->config->port_clock > 67500)
2852 stagger = 0x7;
2853 else if (intel_crtc->config->port_clock > 33750)
2854 stagger = 0x4;
2855 else
2856 stagger = 0x2;
2857
2858 val = vlv_dpio_read(dev_priv, pipe, VLV_PCS01_DW11(ch));
2859 val |= DPIO_TX2_STAGGER_MASK(0x1f);
2860 vlv_dpio_write(dev_priv, pipe, VLV_PCS01_DW11(ch), val);
2861
e0fce78f
VS		 2862 if (intel_crtc->config->lane_count > 2) {
2863 val = vlv_dpio_read(dev_priv, pipe, VLV_PCS23_DW11(ch));
2864 val |= DPIO_TX2_STAGGER_MASK(0x1f);
2865 vlv_dpio_write(dev_priv, pipe, VLV_PCS23_DW11(ch), val);
2866 }
2e523e98
VS		 2867
2868 vlv_dpio_write(dev_priv, pipe, VLV_PCS01_DW12(ch),
2869 DPIO_LANESTAGGER_STRAP(stagger) |
2870 DPIO_LANESTAGGER_STRAP_OVRD |
2871 DPIO_TX1_STAGGER_MASK(0x1f) |
2872 DPIO_TX1_STAGGER_MULT(6) |
2873 DPIO_TX2_STAGGER_MULT(0));
2874
e0fce78f
VS		 2875 if (intel_crtc->config->lane_count > 2) {
2876 vlv_dpio_write(dev_priv, pipe, VLV_PCS23_DW12(ch),
2877 DPIO_LANESTAGGER_STRAP(stagger) |
2878 DPIO_LANESTAGGER_STRAP_OVRD |
2879 DPIO_TX1_STAGGER_MASK(0x1f) |
2880 DPIO_TX1_STAGGER_MULT(7) |
2881 DPIO_TX2_STAGGER_MULT(5));
2882 }
e4a1d846 2883
a8f327fb
VS		 2884 /* Deassert data lane reset */
2885 chv_data_lane_soft_reset(encoder, false);
2886
a580516d 2887 mutex_unlock(&dev_priv->sb_lock);
e4a1d846 2888
e4a1d846 2889 intel_enable_dp(encoder);
b0b33846
VS		 2890
2891 /* Second common lane will stay alive on its own now */
2892 if (dport->release_cl2_override) {
2893 chv_phy_powergate_ch(dev_priv, DPIO_PHY0, DPIO_CH1, false);
2894 dport->release_cl2_override = false;
2895 }
e4a1d846
CML		 2896}
2897
9197c88b
VS		 2898static void chv_dp_pre_pll_enable(struct intel_encoder *encoder)
2899{
2900 struct intel_digital_port *dport = enc_to_dig_port(&encoder->base);
2901 struct drm_device *dev = encoder->base.dev;
2902 struct drm_i915_private *dev_priv = dev->dev_private;
2903 struct intel_crtc *intel_crtc =
2904 to_intel_crtc(encoder->base.crtc);
2905 enum dpio_channel ch = vlv_dport_to_channel(dport);
2906 enum pipe pipe = intel_crtc->pipe;
e0fce78f
VS		 2907 unsigned int lane_mask =
2908 intel_dp_unused_lane_mask(intel_crtc->config->lane_count);
9197c88b
VS		 2909 u32 val;
2910
625695f8
VS		 2911 intel_dp_prepare(encoder);
2912
b0b33846
VS		 2913 /*
2914 * Must trick the second common lane into life.
2915 * Otherwise we can't even access the PLL.
2916 */
2917 if (ch == DPIO_CH0 && pipe == PIPE_B)
2918 dport->release_cl2_override =
2919 !chv_phy_powergate_ch(dev_priv, DPIO_PHY0, DPIO_CH1, true);
2920
e0fce78f
VS		 2921 chv_phy_powergate_lanes(encoder, true, lane_mask);
2922
a580516d 2923 mutex_lock(&dev_priv->sb_lock);
9197c88b 2924
a8f327fb
VS		 2925 /* Assert data lane reset */
2926 chv_data_lane_soft_reset(encoder, true);
2927
b9e5ac3c
VS		 2928 /* program left/right clock distribution */
2929 if (pipe != PIPE_B) {
2930 val = vlv_dpio_read(dev_priv, pipe, _CHV_CMN_DW5_CH0);
2931 val &= ~(CHV_BUFLEFTENA1_MASK | CHV_BUFRIGHTENA1_MASK);
2932 if (ch == DPIO_CH0)
2933 val |= CHV_BUFLEFTENA1_FORCE;
2934 if (ch == DPIO_CH1)
2935 val |= CHV_BUFRIGHTENA1_FORCE;
2936 vlv_dpio_write(dev_priv, pipe, _CHV_CMN_DW5_CH0, val);
2937 } else {
2938 val = vlv_dpio_read(dev_priv, pipe, _CHV_CMN_DW1_CH1);
2939 val &= ~(CHV_BUFLEFTENA2_MASK | CHV_BUFRIGHTENA2_MASK);
2940 if (ch == DPIO_CH0)
2941 val |= CHV_BUFLEFTENA2_FORCE;
2942 if (ch == DPIO_CH1)
2943 val |= CHV_BUFRIGHTENA2_FORCE;
2944 vlv_dpio_write(dev_priv, pipe, _CHV_CMN_DW1_CH1, val);
2945 }
2946
9197c88b
VS		 2947 /* program clock channel usage */
2948 val = vlv_dpio_read(dev_priv, pipe, VLV_PCS01_DW8(ch));
2949 val |= CHV_PCS_USEDCLKCHANNEL_OVRRIDE;
2950 if (pipe != PIPE_B)
2951 val &= ~CHV_PCS_USEDCLKCHANNEL;
2952 else
2953 val |= CHV_PCS_USEDCLKCHANNEL;
2954 vlv_dpio_write(dev_priv, pipe, VLV_PCS01_DW8(ch), val);
2955
e0fce78f
VS		 2956 if (intel_crtc->config->lane_count > 2) {
2957 val = vlv_dpio_read(dev_priv, pipe, VLV_PCS23_DW8(ch));
2958 val |= CHV_PCS_USEDCLKCHANNEL_OVRRIDE;
2959 if (pipe != PIPE_B)
2960 val &= ~CHV_PCS_USEDCLKCHANNEL;
2961 else
2962 val |= CHV_PCS_USEDCLKCHANNEL;
2963 vlv_dpio_write(dev_priv, pipe, VLV_PCS23_DW8(ch), val);
2964 }
9197c88b
VS		 2965
2966 /*
2967 * This a a bit weird since generally CL
2968 * matches the pipe, but here we need to
2969 * pick the CL based on the port.
2970 */
2971 val = vlv_dpio_read(dev_priv, pipe, CHV_CMN_DW19(ch));
2972 if (pipe != PIPE_B)
2973 val &= ~CHV_CMN_USEDCLKCHANNEL;
2974 else
2975 val |= CHV_CMN_USEDCLKCHANNEL;
2976 vlv_dpio_write(dev_priv, pipe, CHV_CMN_DW19(ch), val);
2977
a580516d 2978 mutex_unlock(&dev_priv->sb_lock);
9197c88b
VS		 2979}
2980
d6db995f
VS		 2981static void chv_dp_post_pll_disable(struct intel_encoder *encoder)
2982{
2983 struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
2984 enum pipe pipe = to_intel_crtc(encoder->base.crtc)->pipe;
2985 u32 val;
2986
2987 mutex_lock(&dev_priv->sb_lock);
2988
2989 /* disable left/right clock distribution */
2990 if (pipe != PIPE_B) {
2991 val = vlv_dpio_read(dev_priv, pipe, _CHV_CMN_DW5_CH0);
2992 val &= ~(CHV_BUFLEFTENA1_MASK | CHV_BUFRIGHTENA1_MASK);
2993 vlv_dpio_write(dev_priv, pipe, _CHV_CMN_DW5_CH0, val);
2994 } else {
2995 val = vlv_dpio_read(dev_priv, pipe, _CHV_CMN_DW1_CH1);
2996 val &= ~(CHV_BUFLEFTENA2_MASK | CHV_BUFRIGHTENA2_MASK);
2997 vlv_dpio_write(dev_priv, pipe, _CHV_CMN_DW1_CH1, val);
2998 }
2999
3000 mutex_unlock(&dev_priv->sb_lock);
e0fce78f 3001
b0b33846
VS		 3002 /*
3003 * Leave the power down bit cleared for at least one
3004 * lane so that chv_powergate_phy_ch() will power
3005 * on something when the channel is otherwise unused.
3006 * When the port is off and the override is removed
3007 * the lanes power down anyway, so otherwise it doesn't
3008 * really matter what the state of power down bits is
3009 * after this.
3010 */
e0fce78f 3011 chv_phy_powergate_lanes(encoder, false, 0x0);
d6db995f
VS		 3012}
3013
a4fc5ed6 3014/*
df0c237d
JB		 3015 * Native read with retry for link status and receiver capability reads for
3016 * cases where the sink may still be asleep.
9d1a1031
JN		 3017 *
3018 * Sinks are *supposed* to come up within 1ms from an off state, but we're also
3019 * supposed to retry 3 times per the spec.
a4fc5ed6 3020 */
9d1a1031
JN		 3021static ssize_t
3022intel_dp_dpcd_read_wake(struct drm_dp_aux *aux, unsigned int offset,
3023 void *buffer, size_t size)
a4fc5ed6 3024{
9d1a1031
JN		 3025 ssize_t ret;
3026 int i;
61da5fab 3027
f6a19066
VS		 3028 /*
3029 * Sometime we just get the same incorrect byte repeated
3030 * over the entire buffer. Doing just one throw away read
3031 * initially seems to "solve" it.
3032 */
3033 drm_dp_dpcd_read(aux, DP_DPCD_REV, buffer, 1);
3034
61da5fab 3035 for (i = 0; i < 3; i++) {
9d1a1031
JN		 3036 ret = drm_dp_dpcd_read(aux, offset, buffer, size);
3037 if (ret == size)
3038 return ret;
61da5fab
JB		 3039 msleep(1);
3040 }
a4fc5ed6 3041
9d1a1031 3042 return ret;
a4fc5ed6
KP		 3043}
3044
3045/*
3046 * Fetch AUX CH registers 0x202 - 0x207 which contain
3047 * link status information
3048 */
94223d04 3049bool
93f62dad 3050intel_dp_get_link_status(struct intel_dp *intel_dp, uint8_t link_status[DP_LINK_STATUS_SIZE])
a4fc5ed6 3051{
9d1a1031
JN		 3052 return intel_dp_dpcd_read_wake(&intel_dp->aux,
3053 DP_LANE0_1_STATUS,
3054 link_status,
3055 DP_LINK_STATUS_SIZE) == DP_LINK_STATUS_SIZE;
a4fc5ed6
KP		 3056}
3057
1100244e 3058/* These are source-specific values. */
94223d04 3059uint8_t
1a2eb460 3060intel_dp_voltage_max(struct intel_dp *intel_dp)
a4fc5ed6 3061{
30add22d 3062 struct drm_device *dev = intel_dp_to_dev(intel_dp);
7ad14a29 3063 struct drm_i915_private *dev_priv = dev->dev_private;
bc7d38a4 3064 enum port port = dp_to_dig_port(intel_dp)->port;
1a2eb460 3065
9314726b
VK		 3066 if (IS_BROXTON(dev))
3067 return DP_TRAIN_VOLTAGE_SWING_LEVEL_3;
3068 else if (INTEL_INFO(dev)->gen >= 9) {
9e458034 3069 if (dev_priv->edp_low_vswing && port == PORT_A)
7ad14a29 3070 return DP_TRAIN_VOLTAGE_SWING_LEVEL_3;
5a9d1f1a 3071 return DP_TRAIN_VOLTAGE_SWING_LEVEL_2;
7ad14a29 3072 } else if (IS_VALLEYVIEW(dev))
bd60018a 3073 return DP_TRAIN_VOLTAGE_SWING_LEVEL_3;
bc7d38a4 3074 else if (IS_GEN7(dev) && port == PORT_A)
bd60018a 3075 return DP_TRAIN_VOLTAGE_SWING_LEVEL_2;
bc7d38a4 3076 else if (HAS_PCH_CPT(dev) && port != PORT_A)
bd60018a 3077 return DP_TRAIN_VOLTAGE_SWING_LEVEL_3;
1a2eb460 3078 else
bd60018a 3079 return DP_TRAIN_VOLTAGE_SWING_LEVEL_2;
1a2eb460
KP		 3080}
3081
94223d04 3082uint8_t
1a2eb460
KP		 3083intel_dp_pre_emphasis_max(struct intel_dp *intel_dp, uint8_t voltage_swing)
3084{
30add22d 3085 struct drm_device *dev = intel_dp_to_dev(intel_dp);
bc7d38a4 3086 enum port port = dp_to_dig_port(intel_dp)->port;
1a2eb460 3087
5a9d1f1a
DL		 3088 if (INTEL_INFO(dev)->gen >= 9) {
3089 switch (voltage_swing & DP_TRAIN_VOLTAGE_SWING_MASK) {
3090 case DP_TRAIN_VOLTAGE_SWING_LEVEL_0:
3091 return DP_TRAIN_PRE_EMPH_LEVEL_3;
3092 case DP_TRAIN_VOLTAGE_SWING_LEVEL_1:
3093 return DP_TRAIN_PRE_EMPH_LEVEL_2;
3094 case DP_TRAIN_VOLTAGE_SWING_LEVEL_2:
3095 return DP_TRAIN_PRE_EMPH_LEVEL_1;
7ad14a29
SJ		 3096 case DP_TRAIN_VOLTAGE_SWING_LEVEL_3:
3097 return DP_TRAIN_PRE_EMPH_LEVEL_0;
5a9d1f1a
DL		 3098 default:
3099 return DP_TRAIN_PRE_EMPH_LEVEL_0;
3100 }
3101 } else if (IS_HASWELL(dev) || IS_BROADWELL(dev)) {
d6c0d722 3102 switch (voltage_swing & DP_TRAIN_VOLTAGE_SWING_MASK) {
bd60018a
SJ		 3103 case DP_TRAIN_VOLTAGE_SWING_LEVEL_0:
3104 return DP_TRAIN_PRE_EMPH_LEVEL_3;
3105 case DP_TRAIN_VOLTAGE_SWING_LEVEL_1:
3106 return DP_TRAIN_PRE_EMPH_LEVEL_2;
3107 case DP_TRAIN_VOLTAGE_SWING_LEVEL_2:
3108 return DP_TRAIN_PRE_EMPH_LEVEL_1;
3109 case DP_TRAIN_VOLTAGE_SWING_LEVEL_3:
d6c0d722 3110 default:
bd60018a 3111 return DP_TRAIN_PRE_EMPH_LEVEL_0;
d6c0d722 3112 }
e2fa6fba
P		 3113 } else if (IS_VALLEYVIEW(dev)) {
3114 switch (voltage_swing & DP_TRAIN_VOLTAGE_SWING_MASK) {
bd60018a
SJ		 3115 case DP_TRAIN_VOLTAGE_SWING_LEVEL_0:
3116 return DP_TRAIN_PRE_EMPH_LEVEL_3;
3117 case DP_TRAIN_VOLTAGE_SWING_LEVEL_1:
3118 return DP_TRAIN_PRE_EMPH_LEVEL_2;
3119 case DP_TRAIN_VOLTAGE_SWING_LEVEL_2:
3120 return DP_TRAIN_PRE_EMPH_LEVEL_1;
3121 case DP_TRAIN_VOLTAGE_SWING_LEVEL_3:
e2fa6fba 3122 default:
bd60018a 3123 return DP_TRAIN_PRE_EMPH_LEVEL_0;
e2fa6fba 3124 }
bc7d38a4 3125 } else if (IS_GEN7(dev) && port == PORT_A) {
1a2eb460 3126 switch (voltage_swing & DP_TRAIN_VOLTAGE_SWING_MASK) {
bd60018a
SJ		 3127 case DP_TRAIN_VOLTAGE_SWING_LEVEL_0:
3128 return DP_TRAIN_PRE_EMPH_LEVEL_2;
3129 case DP_TRAIN_VOLTAGE_SWING_LEVEL_1:
3130 case DP_TRAIN_VOLTAGE_SWING_LEVEL_2:
3131 return DP_TRAIN_PRE_EMPH_LEVEL_1;
1a2eb460 3132 default:
bd60018a 3133 return DP_TRAIN_PRE_EMPH_LEVEL_0;
1a2eb460
KP		 3134 }
3135 } else {
3136 switch (voltage_swing & DP_TRAIN_VOLTAGE_SWING_MASK) {
bd60018a
SJ		 3137 case DP_TRAIN_VOLTAGE_SWING_LEVEL_0:
3138 return DP_TRAIN_PRE_EMPH_LEVEL_2;
3139 case DP_TRAIN_VOLTAGE_SWING_LEVEL_1:
3140 return DP_TRAIN_PRE_EMPH_LEVEL_2;
3141 case DP_TRAIN_VOLTAGE_SWING_LEVEL_2:
3142 return DP_TRAIN_PRE_EMPH_LEVEL_1;
3143 case DP_TRAIN_VOLTAGE_SWING_LEVEL_3:
1a2eb460 3144 default:
bd60018a 3145 return DP_TRAIN_PRE_EMPH_LEVEL_0;
1a2eb460 3146 }
a4fc5ed6
KP		 3147 }
3148}
3149
5829975c 3150static uint32_t vlv_signal_levels(struct intel_dp *intel_dp)
e2fa6fba
P		 3151{
3152 struct drm_device *dev = intel_dp_to_dev(intel_dp);
3153 struct drm_i915_private *dev_priv = dev->dev_private;
3154 struct intel_digital_port *dport = dp_to_dig_port(intel_dp);
5e69f97f
CML		 3155 struct intel_crtc *intel_crtc =
3156 to_intel_crtc(dport->base.base.crtc);
e2fa6fba
P		 3157 unsigned long demph_reg_value, preemph_reg_value,
3158 uniqtranscale_reg_value;
3159 uint8_t train_set = intel_dp->train_set[0];
e4607fcf 3160 enum dpio_channel port = vlv_dport_to_channel(dport);
5e69f97f 3161 int pipe = intel_crtc->pipe;
e2fa6fba
P		 3162
3163 switch (train_set & DP_TRAIN_PRE_EMPHASIS_MASK) {
bd60018a 3164 case DP_TRAIN_PRE_EMPH_LEVEL_0:
e2fa6fba
P		 3165 preemph_reg_value = 0x0004000;
3166 switch (train_set & DP_TRAIN_VOLTAGE_SWING_MASK) {
bd60018a 3167 case DP_TRAIN_VOLTAGE_SWING_LEVEL_0:
e2fa6fba
P		 3168 demph_reg_value = 0x2B405555;
3169 uniqtranscale_reg_value = 0x552AB83A;
3170 break;
bd60018a 3171 case DP_TRAIN_VOLTAGE_SWING_LEVEL_1:
e2fa6fba
P		 3172 demph_reg_value = 0x2B404040;
3173 uniqtranscale_reg_value = 0x5548B83A;
3174 break;
bd60018a 3175 case DP_TRAIN_VOLTAGE_SWING_LEVEL_2:
e2fa6fba
P		 3176 demph_reg_value = 0x2B245555;
3177 uniqtranscale_reg_value = 0x5560B83A;
3178 break;
bd60018a 3179 case DP_TRAIN_VOLTAGE_SWING_LEVEL_3:
e2fa6fba
P		 3180 demph_reg_value = 0x2B405555;
3181 uniqtranscale_reg_value = 0x5598DA3A;
3182 break;
3183 default:
3184 return 0;
3185 }
3186 break;
bd60018a 3187 case DP_TRAIN_PRE_EMPH_LEVEL_1:
e2fa6fba
P		 3188 preemph_reg_value = 0x0002000;
3189 switch (train_set & DP_TRAIN_VOLTAGE_SWING_MASK) {
bd60018a 3190 case DP_TRAIN_VOLTAGE_SWING_LEVEL_0:
e2fa6fba
P		 3191 demph_reg_value = 0x2B404040;
3192 uniqtranscale_reg_value = 0x5552B83A;
3193 break;
bd60018a 3194 case DP_TRAIN_VOLTAGE_SWING_LEVEL_1:
e2fa6fba
P		 3195 demph_reg_value = 0x2B404848;
3196 uniqtranscale_reg_value = 0x5580B83A;
3197 break;
bd60018a 3198 case DP_TRAIN_VOLTAGE_SWING_LEVEL_2:
e2fa6fba
P		 3199 demph_reg_value = 0x2B404040;
3200 uniqtranscale_reg_value = 0x55ADDA3A;
3201 break;
3202 default:
3203 return 0;
3204 }
3205 break;
bd60018a 3206 case DP_TRAIN_PRE_EMPH_LEVEL_2:
e2fa6fba
P		 3207 preemph_reg_value = 0x0000000;
3208 switch (train_set & DP_TRAIN_VOLTAGE_SWING_MASK) {
bd60018a 3209 case DP_TRAIN_VOLTAGE_SWING_LEVEL_0:
e2fa6fba
P		 3210 demph_reg_value = 0x2B305555;
3211 uniqtranscale_reg_value = 0x5570B83A;
3212 break;
bd60018a 3213 case DP_TRAIN_VOLTAGE_SWING_LEVEL_1:
e2fa6fba
P		 3214 demph_reg_value = 0x2B2B4040;
3215 uniqtranscale_reg_value = 0x55ADDA3A;
3216 break;
3217 default:
3218 return 0;
3219 }
3220 break;
bd60018a 3221 case DP_TRAIN_PRE_EMPH_LEVEL_3:
e2fa6fba
P		 3222 preemph_reg_value = 0x0006000;
3223 switch (train_set & DP_TRAIN_VOLTAGE_SWING_MASK) {
bd60018a 3224 case DP_TRAIN_VOLTAGE_SWING_LEVEL_0:
e2fa6fba
P		 3225 demph_reg_value = 0x1B405555;
3226 uniqtranscale_reg_value = 0x55ADDA3A;
3227 break;
3228 default:
3229 return 0;
3230 }
3231 break;
3232 default:
3233 return 0;
3234 }
3235
a580516d 3236 mutex_lock(&dev_priv->sb_lock);
ab3c759a
CML		 3237 vlv_dpio_write(dev_priv, pipe, VLV_TX_DW5(port), 0x00000000);
3238 vlv_dpio_write(dev_priv, pipe, VLV_TX_DW4(port), demph_reg_value);
3239 vlv_dpio_write(dev_priv, pipe, VLV_TX_DW2(port),
e2fa6fba 3240 uniqtranscale_reg_value);
ab3c759a
CML		 3241 vlv_dpio_write(dev_priv, pipe, VLV_TX_DW3(port), 0x0C782040);
3242 vlv_dpio_write(dev_priv, pipe, VLV_PCS_DW11(port), 0x00030000);
3243 vlv_dpio_write(dev_priv, pipe, VLV_PCS_DW9(port), preemph_reg_value);
3244 vlv_dpio_write(dev_priv, pipe, VLV_TX_DW5(port), 0x80000000);
a580516d 3245 mutex_unlock(&dev_priv->sb_lock);
e2fa6fba
P		 3246
3247 return 0;
3248}
3249
67fa24b4
VS		 3250static bool chv_need_uniq_trans_scale(uint8_t train_set)
3251{
3252 return (train_set & DP_TRAIN_PRE_EMPHASIS_MASK) == DP_TRAIN_PRE_EMPH_LEVEL_0 &&
3253 (train_set & DP_TRAIN_VOLTAGE_SWING_MASK) == DP_TRAIN_VOLTAGE_SWING_LEVEL_3;
3254}
3255
5829975c 3256static uint32_t chv_signal_levels(struct intel_dp *intel_dp)
e4a1d846
CML		 3257{
3258 struct drm_device *dev = intel_dp_to_dev(intel_dp);
3259 struct drm_i915_private *dev_priv = dev->dev_private;
3260 struct intel_digital_port *dport = dp_to_dig_port(intel_dp);
3261 struct intel_crtc *intel_crtc = to_intel_crtc(dport->base.base.crtc);
f72df8db 3262 u32 deemph_reg_value, margin_reg_value, val;
e4a1d846
CML		 3263 uint8_t train_set = intel_dp->train_set[0];
3264 enum dpio_channel ch = vlv_dport_to_channel(dport);
f72df8db
VS		 3265 enum pipe pipe = intel_crtc->pipe;
3266 int i;
e4a1d846
CML		 3267
3268 switch (train_set & DP_TRAIN_PRE_EMPHASIS_MASK) {
bd60018a 3269 case DP_TRAIN_PRE_EMPH_LEVEL_0:
e4a1d846 3270 switch (train_set & DP_TRAIN_VOLTAGE_SWING_MASK) {
bd60018a 3271 case DP_TRAIN_VOLTAGE_SWING_LEVEL_0:
e4a1d846
CML		 3272 deemph_reg_value = 128;
3273 margin_reg_value = 52;
3274 break;
bd60018a 3275 case DP_TRAIN_VOLTAGE_SWING_LEVEL_1:
e4a1d846
CML		 3276 deemph_reg_value = 128;
3277 margin_reg_value = 77;
3278 break;
bd60018a 3279 case DP_TRAIN_VOLTAGE_SWING_LEVEL_2:
e4a1d846
CML		 3280 deemph_reg_value = 128;
3281 margin_reg_value = 102;
3282 break;
bd60018a 3283 case DP_TRAIN_VOLTAGE_SWING_LEVEL_3:
e4a1d846
CML		 3284 deemph_reg_value = 128;
3285 margin_reg_value = 154;
3286 /* FIXME extra to set for 1200 */
3287 break;
3288 default:
3289 return 0;
3290 }
3291 break;
bd60018a 3292 case DP_TRAIN_PRE_EMPH_LEVEL_1:
e4a1d846 3293 switch (train_set & DP_TRAIN_VOLTAGE_SWING_MASK) {
bd60018a 3294 case DP_TRAIN_VOLTAGE_SWING_LEVEL_0:
e4a1d846
CML		 3295 deemph_reg_value = 85;
3296 margin_reg_value = 78;
3297 break;
bd60018a 3298 case DP_TRAIN_VOLTAGE_SWING_LEVEL_1:
e4a1d846
CML		 3299 deemph_reg_value = 85;
3300 margin_reg_value = 116;
3301 break;
bd60018a 3302 case DP_TRAIN_VOLTAGE_SWING_LEVEL_2:
e4a1d846
CML		 3303 deemph_reg_value = 85;
3304 margin_reg_value = 154;
3305 break;
3306 default:
3307 return 0;
3308 }
3309 break;
bd60018a 3310 case DP_TRAIN_PRE_EMPH_LEVEL_2:
e4a1d846 3311 switch (train_set & DP_TRAIN_VOLTAGE_SWING_MASK) {
bd60018a 3312 case DP_TRAIN_VOLTAGE_SWING_LEVEL_0:
e4a1d846
CML		 3313 deemph_reg_value = 64;
3314 margin_reg_value = 104;
3315 break;
bd60018a 3316 case DP_TRAIN_VOLTAGE_SWING_LEVEL_1:
e4a1d846
CML		 3317 deemph_reg_value = 64;
3318 margin_reg_value = 154;
3319 break;
3320 default:
3321 return 0;
3322 }
3323 break;
bd60018a 3324 case DP_TRAIN_PRE_EMPH_LEVEL_3:
e4a1d846 3325 switch (train_set & DP_TRAIN_VOLTAGE_SWING_MASK) {
bd60018a 3326 case DP_TRAIN_VOLTAGE_SWING_LEVEL_0:
e4a1d846
CML		 3327 deemph_reg_value = 43;
3328 margin_reg_value = 154;
3329 break;
3330 default:
3331 return 0;
3332 }
3333 break;
3334 default:
3335 return 0;
3336 }
3337
a580516d 3338 mutex_lock(&dev_priv->sb_lock);
e4a1d846
CML		 3339
3340 /* Clear calc init */
1966e59e
VS		 3341 val = vlv_dpio_read(dev_priv, pipe, VLV_PCS01_DW10(ch));
3342 val &= ~(DPIO_PCS_SWING_CALC_TX0_TX2 | DPIO_PCS_SWING_CALC_TX1_TX3);
a02ef3c7
VS		 3343 val &= ~(DPIO_PCS_TX1DEEMP_MASK | DPIO_PCS_TX2DEEMP_MASK);
3344 val |= DPIO_PCS_TX1DEEMP_9P5 | DPIO_PCS_TX2DEEMP_9P5;
1966e59e
VS		 3345 vlv_dpio_write(dev_priv, pipe, VLV_PCS01_DW10(ch), val);
3346
e0fce78f
VS		 3347 if (intel_crtc->config->lane_count > 2) {
3348 val = vlv_dpio_read(dev_priv, pipe, VLV_PCS23_DW10(ch));
3349 val &= ~(DPIO_PCS_SWING_CALC_TX0_TX2 | DPIO_PCS_SWING_CALC_TX1_TX3);
3350 val &= ~(DPIO_PCS_TX1DEEMP_MASK | DPIO_PCS_TX2DEEMP_MASK);
3351 val |= DPIO_PCS_TX1DEEMP_9P5 | DPIO_PCS_TX2DEEMP_9P5;
3352 vlv_dpio_write(dev_priv, pipe, VLV_PCS23_DW10(ch), val);
3353 }
e4a1d846 3354
a02ef3c7
VS		 3355 val = vlv_dpio_read(dev_priv, pipe, VLV_PCS01_DW9(ch));
3356 val &= ~(DPIO_PCS_TX1MARGIN_MASK | DPIO_PCS_TX2MARGIN_MASK);
3357 val |= DPIO_PCS_TX1MARGIN_000 | DPIO_PCS_TX2MARGIN_000;
3358 vlv_dpio_write(dev_priv, pipe, VLV_PCS01_DW9(ch), val);
3359
e0fce78f
VS		 3360 if (intel_crtc->config->lane_count > 2) {
3361 val = vlv_dpio_read(dev_priv, pipe, VLV_PCS23_DW9(ch));
3362 val &= ~(DPIO_PCS_TX1MARGIN_MASK | DPIO_PCS_TX2MARGIN_MASK);
3363 val |= DPIO_PCS_TX1MARGIN_000 | DPIO_PCS_TX2MARGIN_000;
3364 vlv_dpio_write(dev_priv, pipe, VLV_PCS23_DW9(ch), val);
3365 }
a02ef3c7 3366
e4a1d846 3367 /* Program swing deemph */
e0fce78f 3368 for (i = 0; i < intel_crtc->config->lane_count; i++) {
f72df8db
VS		 3369 val = vlv_dpio_read(dev_priv, pipe, CHV_TX_DW4(ch, i));
3370 val &= ~DPIO_SWING_DEEMPH9P5_MASK;
3371 val |= deemph_reg_value << DPIO_SWING_DEEMPH9P5_SHIFT;
3372 vlv_dpio_write(dev_priv, pipe, CHV_TX_DW4(ch, i), val);
3373 }
e4a1d846
CML		 3374
3375 /* Program swing margin */
e0fce78f 3376 for (i = 0; i < intel_crtc->config->lane_count; i++) {
f72df8db 3377 val = vlv_dpio_read(dev_priv, pipe, CHV_TX_DW2(ch, i));
67fa24b4 3378
1fb44505
VS		 3379 val &= ~DPIO_SWING_MARGIN000_MASK;
3380 val |= margin_reg_value << DPIO_SWING_MARGIN000_SHIFT;
67fa24b4
VS		 3381
3382 /*
3383 * Supposedly this value shouldn't matter when unique transition
3384 * scale is disabled, but in fact it does matter. Let's just
3385 * always program the same value and hope it's OK.
3386 */
3387 val &= ~(0xff << DPIO_UNIQ_TRANS_SCALE_SHIFT);
3388 val |= 0x9a << DPIO_UNIQ_TRANS_SCALE_SHIFT;
3389
f72df8db
VS		 3390 vlv_dpio_write(dev_priv, pipe, CHV_TX_DW2(ch, i), val);
3391 }
e4a1d846 3392
67fa24b4
VS		 3393 /*
3394 * The document said it needs to set bit 27 for ch0 and bit 26
3395 * for ch1. Might be a typo in the doc.
3396 * For now, for this unique transition scale selection, set bit
3397 * 27 for ch0 and ch1.
3398 */
e0fce78f 3399 for (i = 0; i < intel_crtc->config->lane_count; i++) {
f72df8db 3400 val = vlv_dpio_read(dev_priv, pipe, CHV_TX_DW3(ch, i));
67fa24b4 3401 if (chv_need_uniq_trans_scale(train_set))
f72df8db 3402 val |= DPIO_TX_UNIQ_TRANS_SCALE_EN;
67fa24b4
VS		 3403 else
3404 val &= ~DPIO_TX_UNIQ_TRANS_SCALE_EN;
3405 vlv_dpio_write(dev_priv, pipe, CHV_TX_DW3(ch, i), val);
e4a1d846
CML		 3406 }
3407
3408 /* Start swing calculation */
1966e59e
VS		 3409 val = vlv_dpio_read(dev_priv, pipe, VLV_PCS01_DW10(ch));
3410 val |= DPIO_PCS_SWING_CALC_TX0_TX2 | DPIO_PCS_SWING_CALC_TX1_TX3;
3411 vlv_dpio_write(dev_priv, pipe, VLV_PCS01_DW10(ch), val);
3412
e0fce78f
VS		 3413 if (intel_crtc->config->lane_count > 2) {
3414 val = vlv_dpio_read(dev_priv, pipe, VLV_PCS23_DW10(ch));
3415 val |= DPIO_PCS_SWING_CALC_TX0_TX2 | DPIO_PCS_SWING_CALC_TX1_TX3;
3416 vlv_dpio_write(dev_priv, pipe, VLV_PCS23_DW10(ch), val);
3417 }
e4a1d846 3418
a580516d 3419 mutex_unlock(&dev_priv->sb_lock);
e4a1d846
CML		 3420
3421 return 0;
3422}
3423
a4fc5ed6 3424static uint32_t
5829975c 3425gen4_signal_levels(uint8_t train_set)
a4fc5ed6 3426{
3cf2efb1 3427 uint32_t signal_levels = 0;
a4fc5ed6 3428
3cf2efb1 3429 switch (train_set & DP_TRAIN_VOLTAGE_SWING_MASK) {
bd60018a 3430 case DP_TRAIN_VOLTAGE_SWING_LEVEL_0:
a4fc5ed6
KP		 3431 default:
3432 signal_levels |= DP_VOLTAGE_0_4;
3433 break;
bd60018a 3434 case DP_TRAIN_VOLTAGE_SWING_LEVEL_1:
a4fc5ed6
KP		 3435 signal_levels |= DP_VOLTAGE_0_6;
3436 break;
bd60018a 3437 case DP_TRAIN_VOLTAGE_SWING_LEVEL_2:
a4fc5ed6
KP		 3438 signal_levels |= DP_VOLTAGE_0_8;
3439 break;
bd60018a 3440 case DP_TRAIN_VOLTAGE_SWING_LEVEL_3:
a4fc5ed6
KP		 3441 signal_levels |= DP_VOLTAGE_1_2;
3442 break;
3443 }
3cf2efb1 3444 switch (train_set & DP_TRAIN_PRE_EMPHASIS_MASK) {
bd60018a 3445 case DP_TRAIN_PRE_EMPH_LEVEL_0:
a4fc5ed6
KP		 3446 default:
3447 signal_levels |= DP_PRE_EMPHASIS_0;
3448 break;
bd60018a 3449 case DP_TRAIN_PRE_EMPH_LEVEL_1:
a4fc5ed6
KP		 3450 signal_levels |= DP_PRE_EMPHASIS_3_5;
3451 break;
bd60018a 3452 case DP_TRAIN_PRE_EMPH_LEVEL_2:
a4fc5ed6
KP		 3453 signal_levels |= DP_PRE_EMPHASIS_6;
3454 break;
bd60018a 3455 case DP_TRAIN_PRE_EMPH_LEVEL_3:
a4fc5ed6
KP		 3456 signal_levels |= DP_PRE_EMPHASIS_9_5;
3457 break;
3458 }
3459 return signal_levels;
3460}
3461
e3421a18
ZW		 3462/* Gen6's DP voltage swing and pre-emphasis control */
3463static uint32_t
5829975c 3464gen6_edp_signal_levels(uint8_t train_set)
e3421a18 3465{
3c5a62b5
YL		 3466 int signal_levels = train_set & (DP_TRAIN_VOLTAGE_SWING_MASK |
3467 DP_TRAIN_PRE_EMPHASIS_MASK);
3468 switch (signal_levels) {
bd60018a
SJ		 3469 case DP_TRAIN_VOLTAGE_SWING_LEVEL_0 | DP_TRAIN_PRE_EMPH_LEVEL_0:
3470 case DP_TRAIN_VOLTAGE_SWING_LEVEL_1 | DP_TRAIN_PRE_EMPH_LEVEL_0:
3c5a62b5 3471 return EDP_LINK_TRAIN_400_600MV_0DB_SNB_B;
bd60018a 3472 case DP_TRAIN_VOLTAGE_SWING_LEVEL_0 | DP_TRAIN_PRE_EMPH_LEVEL_1:
3c5a62b5 3473 return EDP_LINK_TRAIN_400MV_3_5DB_SNB_B;
bd60018a
SJ		 3474 case DP_TRAIN_VOLTAGE_SWING_LEVEL_0 | DP_TRAIN_PRE_EMPH_LEVEL_2:
3475 case DP_TRAIN_VOLTAGE_SWING_LEVEL_1 | DP_TRAIN_PRE_EMPH_LEVEL_2:
3c5a62b5 3476 return EDP_LINK_TRAIN_400_600MV_6DB_SNB_B;
bd60018a
SJ		 3477 case DP_TRAIN_VOLTAGE_SWING_LEVEL_1 | DP_TRAIN_PRE_EMPH_LEVEL_1:
3478 case DP_TRAIN_VOLTAGE_SWING_LEVEL_2 | DP_TRAIN_PRE_EMPH_LEVEL_1:
3c5a62b5 3479 return EDP_LINK_TRAIN_600_800MV_3_5DB_SNB_B;
bd60018a
SJ		 3480 case DP_TRAIN_VOLTAGE_SWING_LEVEL_2 | DP_TRAIN_PRE_EMPH_LEVEL_0:
3481 case DP_TRAIN_VOLTAGE_SWING_LEVEL_3 | DP_TRAIN_PRE_EMPH_LEVEL_0:
3c5a62b5 3482 return EDP_LINK_TRAIN_800_1200MV_0DB_SNB_B;
e3421a18 3483 default:
3c5a62b5
YL		 3484 DRM_DEBUG_KMS("Unsupported voltage swing/pre-emphasis level:"
3485 "0x%x\n", signal_levels);
3486 return EDP_LINK_TRAIN_400_600MV_0DB_SNB_B;
e3421a18
ZW		 3487 }
3488}
3489
1a2eb460
KP		 3490/* Gen7's DP voltage swing and pre-emphasis control */
3491static uint32_t
5829975c 3492gen7_edp_signal_levels(uint8_t train_set)
1a2eb460
KP		 3493{
3494 int signal_levels = train_set & (DP_TRAIN_VOLTAGE_SWING_MASK |
3495 DP_TRAIN_PRE_EMPHASIS_MASK);
3496 switch (signal_levels) {
bd60018a 3497 case DP_TRAIN_VOLTAGE_SWING_LEVEL_0 | DP_TRAIN_PRE_EMPH_LEVEL_0:
1a2eb460 3498 return EDP_LINK_TRAIN_400MV_0DB_IVB;
bd60018a 3499 case DP_TRAIN_VOLTAGE_SWING_LEVEL_0 | DP_TRAIN_PRE_EMPH_LEVEL_1:
1a2eb460 3500 return EDP_LINK_TRAIN_400MV_3_5DB_IVB;
bd60018a 3501 case DP_TRAIN_VOLTAGE_SWING_LEVEL_0 | DP_TRAIN_PRE_EMPH_LEVEL_2:
1a2eb460
KP		 3502 return EDP_LINK_TRAIN_400MV_6DB_IVB;
3503
bd60018a 3504 case DP_TRAIN_VOLTAGE_SWING_LEVEL_1 | DP_TRAIN_PRE_EMPH_LEVEL_0:
1a2eb460 3505 return EDP_LINK_TRAIN_600MV_0DB_IVB;
bd60018a 3506 case DP_TRAIN_VOLTAGE_SWING_LEVEL_1 | DP_TRAIN_PRE_EMPH_LEVEL_1:
1a2eb460
KP		 3507 return EDP_LINK_TRAIN_600MV_3_5DB_IVB;
3508
bd60018a 3509 case DP_TRAIN_VOLTAGE_SWING_LEVEL_2 | DP_TRAIN_PRE_EMPH_LEVEL_0:
1a2eb460 3510 return EDP_LINK_TRAIN_800MV_0DB_IVB;
bd60018a 3511 case DP_TRAIN_VOLTAGE_SWING_LEVEL_2 | DP_TRAIN_PRE_EMPH_LEVEL_1:
1a2eb460
KP		 3512 return EDP_LINK_TRAIN_800MV_3_5DB_IVB;
3513
3514 default:
3515 DRM_DEBUG_KMS("Unsupported voltage swing/pre-emphasis level:"
3516 "0x%x\n", signal_levels);
3517 return EDP_LINK_TRAIN_500MV_0DB_IVB;
3518 }
3519}
3520
94223d04 3521void
f4eb692e 3522intel_dp_set_signal_levels(struct intel_dp *intel_dp)
f0a3424e
PZ		 3523{
3524 struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp);
bc7d38a4 3525 enum port port = intel_dig_port->port;
f0a3424e 3526 struct drm_device *dev = intel_dig_port->base.base.dev;
b905a915 3527 struct drm_i915_private *dev_priv = to_i915(dev);
f8896f5d 3528 uint32_t signal_levels, mask = 0;
f0a3424e
PZ		 3529 uint8_t train_set = intel_dp->train_set[0];
3530
f8896f5d
DW		 3531 if (HAS_DDI(dev)) {
3532 signal_levels = ddi_signal_levels(intel_dp);
3533
3534 if (IS_BROXTON(dev))
3535 signal_levels = 0;
3536 else
3537 mask = DDI_BUF_EMP_MASK;
e4a1d846 3538 } else if (IS_CHERRYVIEW(dev)) {
5829975c 3539 signal_levels = chv_signal_levels(intel_dp);
e2fa6fba 3540 } else if (IS_VALLEYVIEW(dev)) {
5829975c 3541 signal_levels = vlv_signal_levels(intel_dp);
bc7d38a4 3542 } else if (IS_GEN7(dev) && port == PORT_A) {
5829975c 3543 signal_levels = gen7_edp_signal_levels(train_set);
f0a3424e 3544 mask = EDP_LINK_TRAIN_VOL_EMP_MASK_IVB;
bc7d38a4 3545 } else if (IS_GEN6(dev) && port == PORT_A) {
5829975c 3546 signal_levels = gen6_edp_signal_levels(train_set);
f0a3424e
PZ		 3547 mask = EDP_LINK_TRAIN_VOL_EMP_MASK_SNB;
3548 } else {
5829975c 3549 signal_levels = gen4_signal_levels(train_set);
f0a3424e
PZ		 3550 mask = DP_VOLTAGE_MASK | DP_PRE_EMPHASIS_MASK;
3551 }
3552
96fb9f9b
VK		 3553 if (mask)
3554 DRM_DEBUG_KMS("Using signal levels %08x\n", signal_levels);
3555
3556 DRM_DEBUG_KMS("Using vswing level %d\n",
3557 train_set & DP_TRAIN_VOLTAGE_SWING_MASK);
3558 DRM_DEBUG_KMS("Using pre-emphasis level %d\n",
3559 (train_set & DP_TRAIN_PRE_EMPHASIS_MASK) >>
3560 DP_TRAIN_PRE_EMPHASIS_SHIFT);
f0a3424e 3561
f4eb692e 3562 intel_dp->DP = (intel_dp->DP & ~mask) | signal_levels;
b905a915
ACO		 3563
3564 I915_WRITE(intel_dp->output_reg, intel_dp->DP);
3565 POSTING_READ(intel_dp->output_reg);
f0a3424e
PZ		 3566}
3567
94223d04 3568void
e9c176d5
ACO		 3569intel_dp_program_link_training_pattern(struct intel_dp *intel_dp,
3570 uint8_t dp_train_pat)
a4fc5ed6 3571{
174edf1f 3572 struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp);
90a6b7b0
VS		 3573 struct drm_i915_private *dev_priv =
3574 to_i915(intel_dig_port->base.base.dev);
a4fc5ed6 3575
f4eb692e 3576 _intel_dp_set_link_train(intel_dp, &intel_dp->DP, dp_train_pat);
47ea7542 3577
f4eb692e 3578 I915_WRITE(intel_dp->output_reg, intel_dp->DP);
ea5b213a 3579 POSTING_READ(intel_dp->output_reg);
e9c176d5
ACO		 3580}
3581
94223d04 3582void intel_dp_set_idle_link_train(struct intel_dp *intel_dp)
3ab9c637
ID		 3583{
3584 struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp);
3585 struct drm_device *dev = intel_dig_port->base.base.dev;
3586 struct drm_i915_private *dev_priv = dev->dev_private;
3587 enum port port = intel_dig_port->port;
3588 uint32_t val;
3589
3590 if (!HAS_DDI(dev))
3591 return;
3592
3593 val = I915_READ(DP_TP_CTL(port));
3594 val &= ~DP_TP_CTL_LINK_TRAIN_MASK;
3595 val |= DP_TP_CTL_LINK_TRAIN_IDLE;
3596 I915_WRITE(DP_TP_CTL(port), val);
3597
3598 /*
3599 * On PORT_A we can have only eDP in SST mode. There the only reason
3600 * we need to set idle transmission mode is to work around a HW issue
3601 * where we enable the pipe while not in idle link-training mode.
3602 * In this case there is requirement to wait for a minimum number of
3603 * idle patterns to be sent.
3604 */
3605 if (port == PORT_A)
3606 return;
3607
3608 if (wait_for((I915_READ(DP_TP_STATUS(port)) & DP_TP_STATUS_IDLE_DONE),
3609 1))
3610 DRM_ERROR("Timed out waiting for DP idle patterns\n");
3611}
3612
a4fc5ed6 3613static void
ea5b213a 3614intel_dp_link_down(struct intel_dp *intel_dp)
a4fc5ed6 3615{
da63a9f2 3616 struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp);
1612c8bd 3617 struct intel_crtc *crtc = to_intel_crtc(intel_dig_port->base.base.crtc);
bc7d38a4 3618 enum port port = intel_dig_port->port;
da63a9f2 3619 struct drm_device *dev = intel_dig_port->base.base.dev;
a4fc5ed6 3620 struct drm_i915_private *dev_priv = dev->dev_private;
ea5b213a 3621 uint32_t DP = intel_dp->DP;
a4fc5ed6 3622
bc76e320 3623 if (WARN_ON(HAS_DDI(dev)))
c19b0669
PZ		 3624 return;
3625
0c33d8d7 3626 if (WARN_ON((I915_READ(intel_dp->output_reg) & DP_PORT_EN) == 0))
1b39d6f3
CW		 3627 return;
3628
28c97730 3629 DRM_DEBUG_KMS("\n");
32f9d658 3630
39e5fa88
VS		 3631 if ((IS_GEN7(dev) && port == PORT_A) ||
3632 (HAS_PCH_CPT(dev) && port != PORT_A)) {
e3421a18 3633 DP &= ~DP_LINK_TRAIN_MASK_CPT;
1612c8bd 3634 DP |= DP_LINK_TRAIN_PAT_IDLE_CPT;
e3421a18 3635 } else {
aad3d14d
VS		 3636 if (IS_CHERRYVIEW(dev))
3637 DP &= ~DP_LINK_TRAIN_MASK_CHV;
3638 else
3639 DP &= ~DP_LINK_TRAIN_MASK;
1612c8bd 3640 DP |= DP_LINK_TRAIN_PAT_IDLE;
e3421a18 3641 }
1612c8bd 3642 I915_WRITE(intel_dp->output_reg, DP);
fe255d00 3643 POSTING_READ(intel_dp->output_reg);
5eb08b69 3644
1612c8bd
VS		 3645 DP &= ~(DP_PORT_EN | DP_AUDIO_OUTPUT_ENABLE);
3646 I915_WRITE(intel_dp->output_reg, DP);
3647 POSTING_READ(intel_dp->output_reg);
3648
3649 /*
3650 * HW workaround for IBX, we need to move the port
3651 * to transcoder A after disabling it to allow the
3652 * matching HDMI port to be enabled on transcoder A.
3653 */
3654 if (HAS_PCH_IBX(dev) && crtc->pipe == PIPE_B && port != PORT_A) {
3655 /* always enable with pattern 1 (as per spec) */
3656 DP &= ~(DP_PIPEB_SELECT | DP_LINK_TRAIN_MASK);
3657 DP |= DP_PORT_EN | DP_LINK_TRAIN_PAT_1;
3658 I915_WRITE(intel_dp->output_reg, DP);
3659 POSTING_READ(intel_dp->output_reg);
3660
3661 DP &= ~DP_PORT_EN;
5bddd17f 3662 I915_WRITE(intel_dp->output_reg, DP);
0ca09685 3663 POSTING_READ(intel_dp->output_reg);
5bddd17f
EA		 3664 }
3665
f01eca2e 3666 msleep(intel_dp->panel_power_down_delay);
a4fc5ed6
KP		 3667}
3668
26d61aad
KP		 3669static bool
3670intel_dp_get_dpcd(struct intel_dp *intel_dp)
92fd8fd1 3671{
a031d709
RV		 3672 struct intel_digital_port *dig_port = dp_to_dig_port(intel_dp);
3673 struct drm_device *dev = dig_port->base.base.dev;
3674 struct drm_i915_private *dev_priv = dev->dev_private;
fc0f8e25 3675 uint8_t rev;
a031d709 3676
9d1a1031
JN		 3677 if (intel_dp_dpcd_read_wake(&intel_dp->aux, 0x000, intel_dp->dpcd,
3678 sizeof(intel_dp->dpcd)) < 0)
edb39244 3679 return false; /* aux transfer failed */
92fd8fd1 3680
a8e98153 3681 DRM_DEBUG_KMS("DPCD: %*ph\n", (int) sizeof(intel_dp->dpcd), intel_dp->dpcd);
577c7a50 3682
edb39244
AJ		 3683 if (intel_dp->dpcd[DP_DPCD_REV] == 0)
3684 return false; /* DPCD not present */
3685
2293bb5c
SK		 3686 /* Check if the panel supports PSR */
3687 memset(intel_dp->psr_dpcd, 0, sizeof(intel_dp->psr_dpcd));
50003939 3688 if (is_edp(intel_dp)) {
9d1a1031
JN		 3689 intel_dp_dpcd_read_wake(&intel_dp->aux, DP_PSR_SUPPORT,
3690 intel_dp->psr_dpcd,
3691 sizeof(intel_dp->psr_dpcd));
a031d709
RV		 3692 if (intel_dp->psr_dpcd[0] & DP_PSR_IS_SUPPORTED) {
3693 dev_priv->psr.sink_support = true;
50003939 3694 DRM_DEBUG_KMS("Detected EDP PSR Panel.\n");
a031d709 3695 }
474d1ec4
SJ		 3696
3697 if (INTEL_INFO(dev)->gen >= 9 &&
3698 (intel_dp->psr_dpcd[0] & DP_PSR2_IS_SUPPORTED)) {
3699 uint8_t frame_sync_cap;
3700
3701 dev_priv->psr.sink_support = true;
3702 intel_dp_dpcd_read_wake(&intel_dp->aux,
3703 DP_SINK_DEVICE_AUX_FRAME_SYNC_CAP,
3704 &frame_sync_cap, 1);
3705 dev_priv->psr.aux_frame_sync = frame_sync_cap ? true : false;
3706 /* PSR2 needs frame sync as well */
3707 dev_priv->psr.psr2_support = dev_priv->psr.aux_frame_sync;
3708 DRM_DEBUG_KMS("PSR2 %s on sink",
3709 dev_priv->psr.psr2_support ? "supported" : "not supported");
3710 }
50003939
JN		 3711 }
3712
bc5133d5 3713 DRM_DEBUG_KMS("Display Port TPS3 support: source %s, sink %s\n",
742f491d
JN		 3714 yesno(intel_dp_source_supports_hbr2(dev)),
3715 yesno(drm_dp_tps3_supported(intel_dp->dpcd)));
06ea66b6 3716
fc0f8e25
SJ		 3717 /* Intermediate frequency support */
3718 if (is_edp(intel_dp) &&
3719 (intel_dp->dpcd[DP_EDP_CONFIGURATION_CAP] & DP_DPCD_DISPLAY_CONTROL_CAPABLE) &&
3720 (intel_dp_dpcd_read_wake(&intel_dp->aux, DP_EDP_DPCD_REV, &rev, 1) == 1) &&
3721 (rev >= 0x03)) { /* eDp v1.4 or higher */
94ca719e 3722 __le16 sink_rates[DP_MAX_SUPPORTED_RATES];
ea2d8a42
VS		 3723 int i;
3724
fc0f8e25
SJ		 3725 intel_dp_dpcd_read_wake(&intel_dp->aux,
3726 DP_SUPPORTED_LINK_RATES,
94ca719e
VS		 3727 sink_rates,
3728 sizeof(sink_rates));
ea2d8a42 3729
94ca719e
VS		 3730 for (i = 0; i < ARRAY_SIZE(sink_rates); i++) {
3731 int val = le16_to_cpu(sink_rates[i]);
ea2d8a42
VS		 3732
3733 if (val == 0)
3734 break;
3735
af77b974
SJ		 3736 /* Value read is in kHz while drm clock is saved in deca-kHz */
3737 intel_dp->sink_rates[i] = (val * 200) / 10;
ea2d8a42 3738 }
94ca719e 3739 intel_dp->num_sink_rates = i;
fc0f8e25 3740 }
0336400e
VS		 3741
3742 intel_dp_print_rates(intel_dp);
3743
edb39244
AJ		 3744 if (!(intel_dp->dpcd[DP_DOWNSTREAMPORT_PRESENT] &
3745 DP_DWN_STRM_PORT_PRESENT))
3746 return true; /* native DP sink */
3747
3748 if (intel_dp->dpcd[DP_DPCD_REV] == 0x10)
3749 return true; /* no per-port downstream info */
3750
9d1a1031
JN		 3751 if (intel_dp_dpcd_read_wake(&intel_dp->aux, DP_DOWNSTREAM_PORT_0,
3752 intel_dp->downstream_ports,
3753 DP_MAX_DOWNSTREAM_PORTS) < 0)
edb39244
AJ		 3754 return false; /* downstream port status fetch failed */
3755
3756 return true;
92fd8fd1
KP		 3757}
3758
0d198328
AJ		 3759static void
3760intel_dp_probe_oui(struct intel_dp *intel_dp)
3761{
3762 u8 buf[3];
3763
3764 if (!(intel_dp->dpcd[DP_DOWN_STREAM_PORT_COUNT] & DP_OUI_SUPPORT))
3765 return;
3766
9d1a1031 3767 if (intel_dp_dpcd_read_wake(&intel_dp->aux, DP_SINK_OUI, buf, 3) == 3)
0d198328
AJ		 3768 DRM_DEBUG_KMS("Sink OUI: %02hx%02hx%02hx\n",
3769 buf[0], buf[1], buf[2]);
3770
9d1a1031 3771 if (intel_dp_dpcd_read_wake(&intel_dp->aux, DP_BRANCH_OUI, buf, 3) == 3)
0d198328
AJ		 3772 DRM_DEBUG_KMS("Branch OUI: %02hx%02hx%02hx\n",
3773 buf[0], buf[1], buf[2]);
3774}
3775
0e32b39c
DA		 3776static bool
3777intel_dp_probe_mst(struct intel_dp *intel_dp)
3778{
3779 u8 buf[1];
3780
3781 if (!intel_dp->can_mst)
3782 return false;
3783
3784 if (intel_dp->dpcd[DP_DPCD_REV] < 0x12)
3785 return false;
3786
0e32b39c
DA		 3787 if (intel_dp_dpcd_read_wake(&intel_dp->aux, DP_MSTM_CAP, buf, 1)) {
3788 if (buf[0] & DP_MST_CAP) {
3789 DRM_DEBUG_KMS("Sink is MST capable\n");
3790 intel_dp->is_mst = true;
3791 } else {
3792 DRM_DEBUG_KMS("Sink is not MST capable\n");
3793 intel_dp->is_mst = false;
3794 }
3795 }
0e32b39c
DA		 3796
3797 drm_dp_mst_topology_mgr_set_mst(&intel_dp->mst_mgr, intel_dp->is_mst);
3798 return intel_dp->is_mst;
3799}
3800
e5a1cab5 3801static int intel_dp_sink_crc_stop(struct intel_dp *intel_dp)
d2e216d0 3802{
082dcc7c
RV		 3803 struct intel_digital_port *dig_port = dp_to_dig_port(intel_dp);
3804 struct intel_crtc *intel_crtc = to_intel_crtc(dig_port->base.base.crtc);
ad9dc91b 3805 u8 buf;
e5a1cab5 3806 int ret = 0;
d2e216d0 3807
082dcc7c
RV		 3808 if (drm_dp_dpcd_readb(&intel_dp->aux, DP_TEST_SINK, &buf) < 0) {
3809 DRM_DEBUG_KMS("Sink CRC couldn't be stopped properly\n");
e5a1cab5
RV		 3810 ret = -EIO;
3811 goto out;
4373f0f2
PZ		 3812 }
3813
082dcc7c 3814 if (drm_dp_dpcd_writeb(&intel_dp->aux, DP_TEST_SINK,
e5a1cab5 3815 buf & ~DP_TEST_SINK_START) < 0) {
082dcc7c 3816 DRM_DEBUG_KMS("Sink CRC couldn't be stopped properly\n");
e5a1cab5
RV		 3817 ret = -EIO;
3818 goto out;
3819 }
d2e216d0 3820
621d4c76 3821 intel_dp->sink_crc.started = false;
e5a1cab5 3822 out:
082dcc7c 3823 hsw_enable_ips(intel_crtc);
e5a1cab5 3824 return ret;
082dcc7c
RV		 3825}
3826
3827static int intel_dp_sink_crc_start(struct intel_dp *intel_dp)
3828{
3829 struct intel_digital_port *dig_port = dp_to_dig_port(intel_dp);
3830 struct intel_crtc *intel_crtc = to_intel_crtc(dig_port->base.base.crtc);
3831 u8 buf;
e5a1cab5
RV		 3832 int ret;
3833
621d4c76 3834 if (intel_dp->sink_crc.started) {
e5a1cab5
RV		 3835 ret = intel_dp_sink_crc_stop(intel_dp);
3836 if (ret)
3837 return ret;
3838 }
082dcc7c
RV		 3839
3840 if (drm_dp_dpcd_readb(&intel_dp->aux, DP_TEST_SINK_MISC, &buf) < 0)
3841 return -EIO;
3842
3843 if (!(buf & DP_TEST_CRC_SUPPORTED))
3844 return -ENOTTY;
3845
621d4c76
RV		 3846 intel_dp->sink_crc.last_count = buf & DP_TEST_COUNT_MASK;
3847
082dcc7c
RV		 3848 if (drm_dp_dpcd_readb(&intel_dp->aux, DP_TEST_SINK, &buf) < 0)
3849 return -EIO;
3850
3851 hsw_disable_ips(intel_crtc);
1dda5f93 3852
9d1a1031 3853 if (drm_dp_dpcd_writeb(&intel_dp->aux, DP_TEST_SINK,
082dcc7c
RV		 3854 buf | DP_TEST_SINK_START) < 0) {
3855 hsw_enable_ips(intel_crtc);
3856 return -EIO;
4373f0f2
PZ		 3857 }
3858
621d4c76 3859 intel_dp->sink_crc.started = true;
082dcc7c
RV		 3860 return 0;
3861}
3862
3863int intel_dp_sink_crc(struct intel_dp *intel_dp, u8 *crc)
3864{
3865 struct intel_digital_port *dig_port = dp_to_dig_port(intel_dp);
3866 struct drm_device *dev = dig_port->base.base.dev;
3867 struct intel_crtc *intel_crtc = to_intel_crtc(dig_port->base.base.crtc);
3868 u8 buf;
621d4c76 3869 int count, ret;
082dcc7c 3870 int attempts = 6;
aabc95dc 3871 bool old_equal_new;
082dcc7c
RV		 3872
3873 ret = intel_dp_sink_crc_start(intel_dp);
3874 if (ret)
3875 return ret;
3876
ad9dc91b 3877 do {
621d4c76
RV		 3878 intel_wait_for_vblank(dev, intel_crtc->pipe);
3879
1dda5f93 3880 if (drm_dp_dpcd_readb(&intel_dp->aux,
4373f0f2
PZ		 3881 DP_TEST_SINK_MISC, &buf) < 0) {
3882 ret = -EIO;
afe0d67e 3883 goto stop;
4373f0f2 3884 }
621d4c76 3885 count = buf & DP_TEST_COUNT_MASK;
aabc95dc 3886
621d4c76
RV		 3887 /*
3888 * Count might be reset during the loop. In this case
3889 * last known count needs to be reset as well.
3890 */
3891 if (count == 0)
3892 intel_dp->sink_crc.last_count = 0;
3893
3894 if (drm_dp_dpcd_read(&intel_dp->aux, DP_TEST_CRC_R_CR, crc, 6) < 0) {
3895 ret = -EIO;
3896 goto stop;
3897 }
aabc95dc
RV		 3898
3899 old_equal_new = (count == intel_dp->sink_crc.last_count &&
3900 !memcmp(intel_dp->sink_crc.last_crc, crc,
3901 6 * sizeof(u8)));
3902
3903 } while (--attempts && (count == 0 || old_equal_new));
621d4c76
RV		 3904
3905 intel_dp->sink_crc.last_count = buf & DP_TEST_COUNT_MASK;
3906 memcpy(intel_dp->sink_crc.last_crc, crc, 6 * sizeof(u8));
ad9dc91b
RV		 3907
3908 if (attempts == 0) {
aabc95dc
RV		 3909 if (old_equal_new) {
3910 DRM_DEBUG_KMS("Unreliable Sink CRC counter: Current returned CRC is identical to the previous one\n");
3911 } else {
3912 DRM_ERROR("Panel is unable to calculate any CRC after 6 vblanks\n");
3913 ret = -ETIMEDOUT;
3914 goto stop;
3915 }
ad9dc91b 3916 }
d2e216d0 3917
afe0d67e 3918stop:
082dcc7c 3919 intel_dp_sink_crc_stop(intel_dp);
4373f0f2 3920 return ret;
d2e216d0
RV		 3921}
3922
a60f0e38
JB		 3923static bool
3924intel_dp_get_sink_irq(struct intel_dp *intel_dp, u8 *sink_irq_vector)
3925{
9d1a1031
JN		 3926 return intel_dp_dpcd_read_wake(&intel_dp->aux,
3927 DP_DEVICE_SERVICE_IRQ_VECTOR,
3928 sink_irq_vector, 1) == 1;
a60f0e38
JB		 3929}
3930
0e32b39c
DA		 3931static bool
3932intel_dp_get_sink_irq_esi(struct intel_dp *intel_dp, u8 *sink_irq_vector)
3933{
3934 int ret;
3935
3936 ret = intel_dp_dpcd_read_wake(&intel_dp->aux,
3937 DP_SINK_COUNT_ESI,
3938 sink_irq_vector, 14);
3939 if (ret != 14)
3940 return false;
3941
3942 return true;
3943}
3944
c5d5ab7a
TP		 3945static uint8_t intel_dp_autotest_link_training(struct intel_dp *intel_dp)
3946{
3947 uint8_t test_result = DP_TEST_ACK;
3948 return test_result;
3949}
3950
3951static uint8_t intel_dp_autotest_video_pattern(struct intel_dp *intel_dp)
3952{
3953 uint8_t test_result = DP_TEST_NAK;
3954 return test_result;
3955}
3956
3957static uint8_t intel_dp_autotest_edid(struct intel_dp *intel_dp)
a60f0e38 3958{
c5d5ab7a 3959 uint8_t test_result = DP_TEST_NAK;
559be30c
TP		 3960 struct intel_connector *intel_connector = intel_dp->attached_connector;
3961 struct drm_connector *connector = &intel_connector->base;
3962
3963 if (intel_connector->detect_edid == NULL ||
ac6f2e29 3964 connector->edid_corrupt ||
559be30c
TP		 3965 intel_dp->aux.i2c_defer_count > 6) {
3966 /* Check EDID read for NACKs, DEFERs and corruption
3967 * (DP CTS 1.2 Core r1.1)
3968 * 4.2.2.4 : Failed EDID read, I2C_NAK
3969 * 4.2.2.5 : Failed EDID read, I2C_DEFER
3970 * 4.2.2.6 : EDID corruption detected
3971 * Use failsafe mode for all cases
3972 */
3973 if (intel_dp->aux.i2c_nack_count > 0 ||
3974 intel_dp->aux.i2c_defer_count > 0)
3975 DRM_DEBUG_KMS("EDID read had %d NACKs, %d DEFERs\n",
3976 intel_dp->aux.i2c_nack_count,
3977 intel_dp->aux.i2c_defer_count);
3978 intel_dp->compliance_test_data = INTEL_DP_RESOLUTION_FAILSAFE;
3979 } else {
f79b468e
TS		 3980 struct edid *block = intel_connector->detect_edid;
3981
3982 /* We have to write the checksum
3983 * of the last block read
3984 */
3985 block += intel_connector->detect_edid->extensions;
3986
559be30c
TP		 3987 if (!drm_dp_dpcd_write(&intel_dp->aux,
3988 DP_TEST_EDID_CHECKSUM,
f79b468e 3989 &block->checksum,
5a1cc655 3990 1))
559be30c
TP		 3991 DRM_DEBUG_KMS("Failed to write EDID checksum\n");
3992
3993 test_result = DP_TEST_ACK | DP_TEST_EDID_CHECKSUM_WRITE;
3994 intel_dp->compliance_test_data = INTEL_DP_RESOLUTION_STANDARD;
3995 }
3996
3997 /* Set test active flag here so userspace doesn't interrupt things */
3998 intel_dp->compliance_test_active = 1;
3999
c5d5ab7a
TP		 4000 return test_result;
4001}
4002
4003static uint8_t intel_dp_autotest_phy_pattern(struct intel_dp *intel_dp)
a60f0e38 4004{
c5d5ab7a
TP		 4005 uint8_t test_result = DP_TEST_NAK;
4006 return test_result;
4007}
4008
4009static void intel_dp_handle_test_request(struct intel_dp *intel_dp)
4010{
4011 uint8_t response = DP_TEST_NAK;
4012 uint8_t rxdata = 0;
4013 int status = 0;
4014
559be30c 4015 intel_dp->compliance_test_active = 0;
c5d5ab7a 4016 intel_dp->compliance_test_type = 0;
559be30c
TP		 4017 intel_dp->compliance_test_data = 0;
4018
c5d5ab7a
TP		 4019 intel_dp->aux.i2c_nack_count = 0;
4020 intel_dp->aux.i2c_defer_count = 0;
4021
4022 status = drm_dp_dpcd_read(&intel_dp->aux, DP_TEST_REQUEST, &rxdata, 1);
4023 if (status <= 0) {
4024 DRM_DEBUG_KMS("Could not read test request from sink\n");
4025 goto update_status;
4026 }
4027
4028 switch (rxdata) {
4029 case DP_TEST_LINK_TRAINING:
4030 DRM_DEBUG_KMS("LINK_TRAINING test requested\n");
4031 intel_dp->compliance_test_type = DP_TEST_LINK_TRAINING;
4032 response = intel_dp_autotest_link_training(intel_dp);
4033 break;
4034 case DP_TEST_LINK_VIDEO_PATTERN:
4035 DRM_DEBUG_KMS("TEST_PATTERN test requested\n");
4036 intel_dp->compliance_test_type = DP_TEST_LINK_VIDEO_PATTERN;
4037 response = intel_dp_autotest_video_pattern(intel_dp);
4038 break;
4039 case DP_TEST_LINK_EDID_READ:
4040 DRM_DEBUG_KMS("EDID test requested\n");
4041 intel_dp->compliance_test_type = DP_TEST_LINK_EDID_READ;
4042 response = intel_dp_autotest_edid(intel_dp);
4043 break;
4044 case DP_TEST_LINK_PHY_TEST_PATTERN:
4045 DRM_DEBUG_KMS("PHY_PATTERN test requested\n");
4046 intel_dp->compliance_test_type = DP_TEST_LINK_PHY_TEST_PATTERN;
4047 response = intel_dp_autotest_phy_pattern(intel_dp);
4048 break;
4049 default:
4050 DRM_DEBUG_KMS("Invalid test request '%02x'\n", rxdata);
4051 break;
4052 }
4053
4054update_status:
4055 status = drm_dp_dpcd_write(&intel_dp->aux,
4056 DP_TEST_RESPONSE,
4057 &response, 1);
4058 if (status <= 0)
4059 DRM_DEBUG_KMS("Could not write test response to sink\n");
a60f0e38
JB		 4060}
4061
0e32b39c
DA		 4062static int
4063intel_dp_check_mst_status(struct intel_dp *intel_dp)
4064{
4065 bool bret;
4066
4067 if (intel_dp->is_mst) {
4068 u8 esi[16] = { 0 };
4069 int ret = 0;
4070 int retry;
4071 bool handled;
4072 bret = intel_dp_get_sink_irq_esi(intel_dp, esi);
4073go_again:
4074 if (bret == true) {
4075
4076 /* check link status - esi[10] = 0x200c */
90a6b7b0 4077 if (intel_dp->active_mst_links &&
901c2daf 4078 !drm_dp_channel_eq_ok(&esi[10], intel_dp->lane_count)) {
0e32b39c
DA		 4079 DRM_DEBUG_KMS("channel EQ not ok, retraining\n");
4080 intel_dp_start_link_train(intel_dp);
0e32b39c
DA		 4081 intel_dp_stop_link_train(intel_dp);
4082 }
4083
6f34cc39 4084 DRM_DEBUG_KMS("got esi %3ph\n", esi);
0e32b39c
DA		 4085 ret = drm_dp_mst_hpd_irq(&intel_dp->mst_mgr, esi, &handled);
4086
4087 if (handled) {
4088 for (retry = 0; retry < 3; retry++) {
4089 int wret;
4090 wret = drm_dp_dpcd_write(&intel_dp->aux,
4091 DP_SINK_COUNT_ESI+1,
4092 &esi[1], 3);
4093 if (wret == 3) {
4094 break;
4095 }
4096 }
4097
4098 bret = intel_dp_get_sink_irq_esi(intel_dp, esi);
4099 if (bret == true) {
6f34cc39 4100 DRM_DEBUG_KMS("got esi2 %3ph\n", esi);
0e32b39c
DA		 4101 goto go_again;
4102 }
4103 } else
4104 ret = 0;
4105
4106 return ret;
4107 } else {
4108 struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp);
4109 DRM_DEBUG_KMS("failed to get ESI - device may have failed\n");
4110 intel_dp->is_mst = false;
4111 drm_dp_mst_topology_mgr_set_mst(&intel_dp->mst_mgr, intel_dp->is_mst);
4112 /* send a hotplug event */
4113 drm_kms_helper_hotplug_event(intel_dig_port->base.base.dev);
4114 }
4115 }
4116 return -EINVAL;
4117}
4118
a4fc5ed6
KP		 4119/*
4120 * According to DP spec
4121 * 5.1.2:
4122 * 1. Read DPCD
4123 * 2. Configure link according to Receiver Capabilities
4124 * 3. Use Link Training from 2.5.3.3 and 3.5.1.3
4125 * 4. Check link status on receipt of hot-plug interrupt
4126 */
a5146200 4127static void
ea5b213a 4128intel_dp_check_link_status(struct intel_dp *intel_dp)
a4fc5ed6 4129{
5b215bcf 4130 struct drm_device *dev = intel_dp_to_dev(intel_dp);
da63a9f2 4131 struct intel_encoder *intel_encoder = &dp_to_dig_port(intel_dp)->base;
a60f0e38 4132 u8 sink_irq_vector;
93f62dad 4133 u8 link_status[DP_LINK_STATUS_SIZE];
a60f0e38 4134
5b215bcf
DA		 4135 WARN_ON(!drm_modeset_is_locked(&dev->mode_config.connection_mutex));
4136
e02f9a06 4137 if (!intel_encoder->base.crtc)
a4fc5ed6
KP		 4138 return;
4139
1a125d8a
ID		 4140 if (!to_intel_crtc(intel_encoder->base.crtc)->active)
4141 return;
4142
92fd8fd1 4143 /* Try to read receiver status if the link appears to be up */
93f62dad 4144 if (!intel_dp_get_link_status(intel_dp, link_status)) {
a4fc5ed6
KP		 4145 return;
4146 }
4147
92fd8fd1 4148 /* Now read the DPCD to see if it's actually running */
26d61aad 4149 if (!intel_dp_get_dpcd(intel_dp)) {
59cd09e1
JB		 4150 return;
4151 }
4152
a60f0e38
JB		 4153 /* Try to read the source of the interrupt */
4154 if (intel_dp->dpcd[DP_DPCD_REV] >= 0x11 &&
4155 intel_dp_get_sink_irq(intel_dp, &sink_irq_vector)) {
4156 /* Clear interrupt source */
9d1a1031
JN		 4157 drm_dp_dpcd_writeb(&intel_dp->aux,
4158 DP_DEVICE_SERVICE_IRQ_VECTOR,
4159 sink_irq_vector);
a60f0e38
JB		 4160
4161 if (sink_irq_vector & DP_AUTOMATED_TEST_REQUEST)
09b1eb13 4162 DRM_DEBUG_DRIVER("Test request in short pulse not handled\n");
a60f0e38
JB		 4163 if (sink_irq_vector & (DP_CP_IRQ | DP_SINK_SPECIFIC_IRQ))
4164 DRM_DEBUG_DRIVER("CP or sink specific irq unhandled\n");
4165 }
4166
901c2daf 4167 if (!drm_dp_channel_eq_ok(link_status, intel_dp->lane_count)) {
92fd8fd1 4168 DRM_DEBUG_KMS("%s: channel EQ not ok, retraining\n",
8e329a03 4169 intel_encoder->base.name);
33a34e4e 4170 intel_dp_start_link_train(intel_dp);
3ab9c637 4171 intel_dp_stop_link_train(intel_dp);
33a34e4e 4172 }
a4fc5ed6 4173}
a4fc5ed6 4174
caf9ab24 4175/* XXX this is probably wrong for multiple downstream ports */
71ba9000 4176static enum drm_connector_status
26d61aad 4177intel_dp_detect_dpcd(struct intel_dp *intel_dp)
71ba9000 4178{
caf9ab24 4179 uint8_t *dpcd = intel_dp->dpcd;
caf9ab24
AJ		 4180 uint8_t type;
4181
4182 if (!intel_dp_get_dpcd(intel_dp))
4183 return connector_status_disconnected;
4184
4185 /* if there's no downstream port, we're done */
4186 if (!(dpcd[DP_DOWNSTREAMPORT_PRESENT] & DP_DWN_STRM_PORT_PRESENT))
26d61aad 4187 return connector_status_connected;
caf9ab24
AJ		 4188
4189 /* If we're HPD-aware, SINK_COUNT changes dynamically */
c9ff160b
JN		 4190 if (intel_dp->dpcd[DP_DPCD_REV] >= 0x11 &&
4191 intel_dp->downstream_ports[0] & DP_DS_PORT_HPD) {
23235177 4192 uint8_t reg;
9d1a1031
JN		 4193
4194 if (intel_dp_dpcd_read_wake(&intel_dp->aux, DP_SINK_COUNT,
4195 &reg, 1) < 0)
caf9ab24 4196 return connector_status_unknown;
9d1a1031 4197
23235177
AJ		 4198 return DP_GET_SINK_COUNT(reg) ? connector_status_connected
4199 : connector_status_disconnected;
caf9ab24
AJ		 4200 }
4201
4202 /* If no HPD, poke DDC gently */
0b99836f 4203 if (drm_probe_ddc(&intel_dp->aux.ddc))
26d61aad 4204 return connector_status_connected;
caf9ab24
AJ		 4205
4206 /* Well we tried, say unknown for unreliable port types */
c9ff160b
JN		 4207 if (intel_dp->dpcd[DP_DPCD_REV] >= 0x11) {
4208 type = intel_dp->downstream_ports[0] & DP_DS_PORT_TYPE_MASK;
4209 if (type == DP_DS_PORT_TYPE_VGA ||
4210 type == DP_DS_PORT_TYPE_NON_EDID)
4211 return connector_status_unknown;
4212 } else {
4213 type = intel_dp->dpcd[DP_DOWNSTREAMPORT_PRESENT] &
4214 DP_DWN_STRM_PORT_TYPE_MASK;
4215 if (type == DP_DWN_STRM_PORT_TYPE_ANALOG ||
4216 type == DP_DWN_STRM_PORT_TYPE_OTHER)
4217 return connector_status_unknown;
4218 }
caf9ab24
AJ		 4219
4220 /* Anything else is out of spec, warn and ignore */
4221 DRM_DEBUG_KMS("Broken DP branch device, ignoring\n");
26d61aad 4222 return connector_status_disconnected;
71ba9000
AJ		 4223}
4224
d410b56d
CW		 4225static enum drm_connector_status
4226edp_detect(struct intel_dp *intel_dp)
4227{
4228 struct drm_device *dev = intel_dp_to_dev(intel_dp);
4229 enum drm_connector_status status;
4230
4231 status = intel_panel_detect(dev);
4232 if (status == connector_status_unknown)
4233 status = connector_status_connected;
4234
4235 return status;
4236}
4237
b93433cc
JN		 4238static bool ibx_digital_port_connected(struct drm_i915_private *dev_priv,
4239 struct intel_digital_port *port)
5eb08b69 4240{
b93433cc 4241 u32 bit;
01cb9ea6 4242
0df53b77
JN		 4243 switch (port->port) {
4244 case PORT_A:
4245 return true;
4246 case PORT_B:
4247 bit = SDE_PORTB_HOTPLUG;
4248 break;
4249 case PORT_C:
4250 bit = SDE_PORTC_HOTPLUG;
4251 break;
4252 case PORT_D:
4253 bit = SDE_PORTD_HOTPLUG;
4254 break;
4255 default:
4256 MISSING_CASE(port->port);
4257 return false;
4258 }
4259
4260 return I915_READ(SDEISR) & bit;
4261}
4262
4263static bool cpt_digital_port_connected(struct drm_i915_private *dev_priv,
4264 struct intel_digital_port *port)
4265{
4266 u32 bit;
4267
4268 switch (port->port) {
4269 case PORT_A:
4270 return true;
4271 case PORT_B:
4272 bit = SDE_PORTB_HOTPLUG_CPT;
4273 break;
4274 case PORT_C:
4275 bit = SDE_PORTC_HOTPLUG_CPT;
4276 break;
4277 case PORT_D:
4278 bit = SDE_PORTD_HOTPLUG_CPT;
4279 break;
a78695d3
JN		 4280 case PORT_E:
4281 bit = SDE_PORTE_HOTPLUG_SPT;
4282 break;
0df53b77
JN		 4283 default:
4284 MISSING_CASE(port->port);
4285 return false;
b93433cc 4286 }
1b469639 4287
b93433cc 4288 return I915_READ(SDEISR) & bit;
5eb08b69
ZW		 4289}
4290
7e66bcf2 4291static bool g4x_digital_port_connected(struct drm_i915_private *dev_priv,
1d245987 4292 struct intel_digital_port *port)
a4fc5ed6 4293{
9642c81c 4294 u32 bit;
5eb08b69 4295
9642c81c
JN		 4296 switch (port->port) {
4297 case PORT_B:
4298 bit = PORTB_HOTPLUG_LIVE_STATUS_G4X;
4299 break;
4300 case PORT_C:
4301 bit = PORTC_HOTPLUG_LIVE_STATUS_G4X;
4302 break;
4303 case PORT_D:
4304 bit = PORTD_HOTPLUG_LIVE_STATUS_G4X;
4305 break;
4306 default:
4307 MISSING_CASE(port->port);
4308 return false;
4309 }
4310
4311 return I915_READ(PORT_HOTPLUG_STAT) & bit;
4312}
4313
4314static bool vlv_digital_port_connected(struct drm_i915_private *dev_priv,
4315 struct intel_digital_port *port)
4316{
4317 u32 bit;
4318
4319 switch (port->port) {
4320 case PORT_B:
4321 bit = PORTB_HOTPLUG_LIVE_STATUS_VLV;
4322 break;
4323 case PORT_C:
4324 bit = PORTC_HOTPLUG_LIVE_STATUS_VLV;
4325 break;
4326 case PORT_D:
4327 bit = PORTD_HOTPLUG_LIVE_STATUS_VLV;
4328 break;
4329 default:
4330 MISSING_CASE(port->port);
4331 return false;
a4fc5ed6
KP		 4332 }
4333
1d245987 4334 return I915_READ(PORT_HOTPLUG_STAT) & bit;
2a592bec
DA		 4335}
4336
e464bfde 4337static bool bxt_digital_port_connected(struct drm_i915_private *dev_priv,
e2ec35a5 4338 struct intel_digital_port *intel_dig_port)
e464bfde 4339{
e2ec35a5
SJ		 4340 struct intel_encoder *intel_encoder = &intel_dig_port->base;
4341 enum port port;
e464bfde
JN		 4342 u32 bit;
4343
e2ec35a5
SJ		 4344 intel_hpd_pin_to_port(intel_encoder->hpd_pin, &port);
4345 switch (port) {
e464bfde
JN		 4346 case PORT_A:
4347 bit = BXT_DE_PORT_HP_DDIA;
4348 break;
4349 case PORT_B:
4350 bit = BXT_DE_PORT_HP_DDIB;
4351 break;
4352 case PORT_C:
4353 bit = BXT_DE_PORT_HP_DDIC;
4354 break;
4355 default:
e2ec35a5 4356 MISSING_CASE(port);
e464bfde
JN		 4357 return false;
4358 }
4359
4360 return I915_READ(GEN8_DE_PORT_ISR) & bit;
4361}
4362
7e66bcf2
JN		 4363/*
4364 * intel_digital_port_connected - is the specified port connected?
4365 * @dev_priv: i915 private structure
4366 * @port: the port to test
4367 *
4368 * Return %true if @port is connected, %false otherwise.
4369 */
237ed86c 4370bool intel_digital_port_connected(struct drm_i915_private *dev_priv,
7e66bcf2
JN		 4371 struct intel_digital_port *port)
4372{
0df53b77 4373 if (HAS_PCH_IBX(dev_priv))
7e66bcf2 4374 return ibx_digital_port_connected(dev_priv, port);
0df53b77
JN		 4375 if (HAS_PCH_SPLIT(dev_priv))
4376 return cpt_digital_port_connected(dev_priv, port);
e464bfde
JN		 4377 else if (IS_BROXTON(dev_priv))
4378 return bxt_digital_port_connected(dev_priv, port);
9642c81c
JN		 4379 else if (IS_VALLEYVIEW(dev_priv))
4380 return vlv_digital_port_connected(dev_priv, port);
7e66bcf2
JN		 4381 else
4382 return g4x_digital_port_connected(dev_priv, port);
4383}
4384
b93433cc
JN		 4385static enum drm_connector_status
4386ironlake_dp_detect(struct intel_dp *intel_dp)
4387{
4388 struct drm_device *dev = intel_dp_to_dev(intel_dp);
4389 struct drm_i915_private *dev_priv = dev->dev_private;
4390 struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp);
4391
7e66bcf2 4392 if (!intel_digital_port_connected(dev_priv, intel_dig_port))
b93433cc
JN		 4393 return connector_status_disconnected;
4394
4395 return intel_dp_detect_dpcd(intel_dp);
4396}
4397
2a592bec
DA		 4398static enum drm_connector_status
4399g4x_dp_detect(struct intel_dp *intel_dp)
4400{
4401 struct drm_device *dev = intel_dp_to_dev(intel_dp);
4402 struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp);
2a592bec
DA		 4403
4404 /* Can't disconnect eDP, but you can close the lid... */
4405 if (is_edp(intel_dp)) {
4406 enum drm_connector_status status;
4407
4408 status = intel_panel_detect(dev);
4409 if (status == connector_status_unknown)
4410 status = connector_status_connected;
4411 return status;
4412 }
4413
7e66bcf2 4414 if (!intel_digital_port_connected(dev->dev_private, intel_dig_port))
a4fc5ed6
KP		 4415 return connector_status_disconnected;
4416
26d61aad 4417 return intel_dp_detect_dpcd(intel_dp);
a9756bb5
ZW		 4418}
4419
8c241fef 4420static struct edid *
beb60608 4421intel_dp_get_edid(struct intel_dp *intel_dp)
8c241fef 4422{
beb60608 4423 struct intel_connector *intel_connector = intel_dp->attached_connector;
d6f24d0f 4424
9cd300e0
JN		 4425 /* use cached edid if we have one */
4426 if (intel_connector->edid) {
9cd300e0
JN		 4427 /* invalid edid */
4428 if (IS_ERR(intel_connector->edid))
d6f24d0f
JB		 4429 return NULL;
4430
55e9edeb 4431 return drm_edid_duplicate(intel_connector->edid);
beb60608
CW		 4432 } else
4433 return drm_get_edid(&intel_connector->base,
4434 &intel_dp->aux.ddc);
4435}
8c241fef 4436
beb60608
CW		 4437static void
4438intel_dp_set_edid(struct intel_dp *intel_dp)
4439{
4440 struct intel_connector *intel_connector = intel_dp->attached_connector;
4441 struct edid *edid;
8c241fef 4442
beb60608
CW		 4443 edid = intel_dp_get_edid(intel_dp);
4444 intel_connector->detect_edid = edid;
4445
4446 if (intel_dp->force_audio != HDMI_AUDIO_AUTO)
4447 intel_dp->has_audio = intel_dp->force_audio == HDMI_AUDIO_ON;
4448 else
4449 intel_dp->has_audio = drm_detect_monitor_audio(edid);
8c241fef
KP		 4450}
4451
beb60608
CW		 4452static void
4453intel_dp_unset_edid(struct intel_dp *intel_dp)
8c241fef 4454{
beb60608 4455 struct intel_connector *intel_connector = intel_dp->attached_connector;
8c241fef 4456
beb60608
CW		 4457 kfree(intel_connector->detect_edid);
4458 intel_connector->detect_edid = NULL;
9cd300e0 4459
beb60608
CW		 4460 intel_dp->has_audio = false;
4461}
d6f24d0f 4462
beb60608
CW		 4463static enum intel_display_power_domain
4464intel_dp_power_get(struct intel_dp *dp)
4465{
4466 struct intel_encoder *encoder = &dp_to_dig_port(dp)->base;
4467 enum intel_display_power_domain power_domain;
4468
4469 power_domain = intel_display_port_power_domain(encoder);
4470 intel_display_power_get(to_i915(encoder->base.dev), power_domain);
4471
4472 return power_domain;
4473}
d6f24d0f 4474
beb60608
CW		 4475static void
4476intel_dp_power_put(struct intel_dp *dp,
4477 enum intel_display_power_domain power_domain)
4478{
4479 struct intel_encoder *encoder = &dp_to_dig_port(dp)->base;
4480 intel_display_power_put(to_i915(encoder->base.dev), power_domain);
8c241fef
KP		 4481}
4482
a9756bb5
ZW		 4483static enum drm_connector_status
4484intel_dp_detect(struct drm_connector *connector, bool force)
4485{
4486 struct intel_dp *intel_dp = intel_attached_dp(connector);
d63885da
PZ		 4487 struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp);
4488 struct intel_encoder *intel_encoder = &intel_dig_port->base;
fa90ecef 4489 struct drm_device *dev = connector->dev;
a9756bb5 4490 enum drm_connector_status status;
671dedd2 4491 enum intel_display_power_domain power_domain;
0e32b39c 4492 bool ret;
09b1eb13 4493 u8 sink_irq_vector;
a9756bb5 4494
164c8598 4495 DRM_DEBUG_KMS("[CONNECTOR:%d:%s]\n",
c23cc417 4496 connector->base.id, connector->name);
beb60608 4497 intel_dp_unset_edid(intel_dp);
164c8598 4498
0e32b39c
DA		 4499 if (intel_dp->is_mst) {
4500 /* MST devices are disconnected from a monitor POV */
4501 if (intel_encoder->type != INTEL_OUTPUT_EDP)
4502 intel_encoder->type = INTEL_OUTPUT_DISPLAYPORT;
beb60608 4503 return connector_status_disconnected;
0e32b39c
DA		 4504 }
4505
beb60608 4506 power_domain = intel_dp_power_get(intel_dp);
a9756bb5 4507
d410b56d
CW		 4508 /* Can't disconnect eDP, but you can close the lid... */
4509 if (is_edp(intel_dp))
4510 status = edp_detect(intel_dp);
4511 else if (HAS_PCH_SPLIT(dev))
a9756bb5
ZW		 4512 status = ironlake_dp_detect(intel_dp);
4513 else
4514 status = g4x_dp_detect(intel_dp);
4515 if (status != connector_status_connected)
c8c8fb33 4516 goto out;
a9756bb5 4517
0d198328
AJ		 4518 intel_dp_probe_oui(intel_dp);
4519
0e32b39c
DA		 4520 ret = intel_dp_probe_mst(intel_dp);
4521 if (ret) {
4522 /* if we are in MST mode then this connector
4523 won't appear connected or have anything with EDID on it */
4524 if (intel_encoder->type != INTEL_OUTPUT_EDP)
4525 intel_encoder->type = INTEL_OUTPUT_DISPLAYPORT;
4526 status = connector_status_disconnected;
4527 goto out;
4528 }
4529
beb60608 4530 intel_dp_set_edid(intel_dp);
a9756bb5 4531
d63885da
PZ		 4532 if (intel_encoder->type != INTEL_OUTPUT_EDP)
4533 intel_encoder->type = INTEL_OUTPUT_DISPLAYPORT;
c8c8fb33
PZ		 4534 status = connector_status_connected;
4535
09b1eb13
TP		 4536 /* Try to read the source of the interrupt */
4537 if (intel_dp->dpcd[DP_DPCD_REV] >= 0x11 &&
4538 intel_dp_get_sink_irq(intel_dp, &sink_irq_vector)) {
4539 /* Clear interrupt source */
4540 drm_dp_dpcd_writeb(&intel_dp->aux,
4541 DP_DEVICE_SERVICE_IRQ_VECTOR,
4542 sink_irq_vector);
4543
4544 if (sink_irq_vector & DP_AUTOMATED_TEST_REQUEST)
4545 intel_dp_handle_test_request(intel_dp);
4546 if (sink_irq_vector & (DP_CP_IRQ | DP_SINK_SPECIFIC_IRQ))
4547 DRM_DEBUG_DRIVER("CP or sink specific irq unhandled\n");
4548 }
4549
c8c8fb33 4550out:
beb60608 4551 intel_dp_power_put(intel_dp, power_domain);
c8c8fb33 4552 return status;
a4fc5ed6
KP		 4553}
4554
beb60608
CW		 4555static void
4556intel_dp_force(struct drm_connector *connector)
a4fc5ed6 4557{
df0e9248 4558 struct intel_dp *intel_dp = intel_attached_dp(connector);
beb60608 4559 struct intel_encoder *intel_encoder = &dp_to_dig_port(intel_dp)->base;
671dedd2 4560 enum intel_display_power_domain power_domain;
a4fc5ed6 4561
beb60608
CW		 4562 DRM_DEBUG_KMS("[CONNECTOR:%d:%s]\n",
4563 connector->base.id, connector->name);
4564 intel_dp_unset_edid(intel_dp);
a4fc5ed6 4565
beb60608
CW		 4566 if (connector->status != connector_status_connected)
4567 return;
671dedd2 4568
beb60608
CW		 4569 power_domain = intel_dp_power_get(intel_dp);
4570
4571 intel_dp_set_edid(intel_dp);
4572
4573 intel_dp_power_put(intel_dp, power_domain);
4574
4575 if (intel_encoder->type != INTEL_OUTPUT_EDP)
4576 intel_encoder->type = INTEL_OUTPUT_DISPLAYPORT;
4577}
4578
4579static int intel_dp_get_modes(struct drm_connector *connector)
4580{
4581 struct intel_connector *intel_connector = to_intel_connector(connector);
4582 struct edid *edid;
4583
4584 edid = intel_connector->detect_edid;
4585 if (edid) {
4586 int ret = intel_connector_update_modes(connector, edid);
4587 if (ret)
4588 return ret;
4589 }
32f9d658 4590
f8779fda 4591 /* if eDP has no EDID, fall back to fixed mode */
beb60608
CW		 4592 if (is_edp(intel_attached_dp(connector)) &&
4593 intel_connector->panel.fixed_mode) {
f8779fda 4594 struct drm_display_mode *mode;
beb60608
CW		 4595
4596 mode = drm_mode_duplicate(connector->dev,
dd06f90e 4597 intel_connector->panel.fixed_mode);
f8779fda 4598 if (mode) {
32f9d658
ZW		 4599 drm_mode_probed_add(connector, mode);
4600 return 1;
4601 }
4602 }
beb60608 4603
32f9d658 4604 return 0;
a4fc5ed6
KP		 4605}
4606
1aad7ac0
CW		 4607static bool
4608intel_dp_detect_audio(struct drm_connector *connector)
4609{
1aad7ac0 4610 bool has_audio = false;
beb60608 4611 struct edid *edid;
1aad7ac0 4612
beb60608
CW		 4613 edid = to_intel_connector(connector)->detect_edid;
4614 if (edid)
1aad7ac0 4615 has_audio = drm_detect_monitor_audio(edid);
671dedd2 4616
1aad7ac0
CW		 4617 return has_audio;
4618}
4619
f684960e
CW		 4620static int
4621intel_dp_set_property(struct drm_connector *connector,
4622 struct drm_property *property,
4623 uint64_t val)
4624{
e953fd7b 4625 struct drm_i915_private *dev_priv = connector->dev->dev_private;
53b41837 4626 struct intel_connector *intel_connector = to_intel_connector(connector);
da63a9f2
PZ		 4627 struct intel_encoder *intel_encoder = intel_attached_encoder(connector);
4628 struct intel_dp *intel_dp = enc_to_intel_dp(&intel_encoder->base);
f684960e
CW		 4629 int ret;
4630
662595df 4631 ret = drm_object_property_set_value(&connector->base, property, val);
f684960e
CW		 4632 if (ret)
4633 return ret;
4634
3f43c48d 4635 if (property == dev_priv->force_audio_property) {
1aad7ac0
CW		 4636 int i = val;
4637 bool has_audio;
4638
4639 if (i == intel_dp->force_audio)
f684960e
CW		 4640 return 0;
4641
1aad7ac0 4642 intel_dp->force_audio = i;
f684960e 4643
c3e5f67b 4644 if (i == HDMI_AUDIO_AUTO)
1aad7ac0
CW		 4645 has_audio = intel_dp_detect_audio(connector);
4646 else
c3e5f67b 4647 has_audio = (i == HDMI_AUDIO_ON);
1aad7ac0
CW		 4648
4649 if (has_audio == intel_dp->has_audio)
f684960e
CW		 4650 return 0;
4651
1aad7ac0 4652 intel_dp->has_audio = has_audio;
f684960e
CW		 4653 goto done;
4654 }
4655
e953fd7b 4656 if (property == dev_priv->broadcast_rgb_property) {
ae4edb80 4657 bool old_auto = intel_dp->color_range_auto;
0f2a2a75 4658 bool old_range = intel_dp->limited_color_range;
ae4edb80 4659
55bc60db
VS		 4660 switch (val) {
4661 case INTEL_BROADCAST_RGB_AUTO:
4662 intel_dp->color_range_auto = true;
4663 break;
4664 case INTEL_BROADCAST_RGB_FULL:
4665 intel_dp->color_range_auto = false;
0f2a2a75 4666 intel_dp->limited_color_range = false;
55bc60db
VS		 4667 break;
4668 case INTEL_BROADCAST_RGB_LIMITED:
4669 intel_dp->color_range_auto = false;
0f2a2a75 4670 intel_dp->limited_color_range = true;
55bc60db
VS		 4671 break;
4672 default:
4673 return -EINVAL;
4674 }
ae4edb80
DV		 4675
4676 if (old_auto == intel_dp->color_range_auto &&
0f2a2a75 4677 old_range == intel_dp->limited_color_range)
ae4edb80
DV		 4678 return 0;
4679
e953fd7b
CW		 4680 goto done;
4681 }
4682
53b41837
YN		 4683 if (is_edp(intel_dp) &&
4684 property == connector->dev->mode_config.scaling_mode_property) {
4685 if (val == DRM_MODE_SCALE_NONE) {
4686 DRM_DEBUG_KMS("no scaling not supported\n");
4687 return -EINVAL;
4688 }
4689
4690 if (intel_connector->panel.fitting_mode == val) {
4691 /* the eDP scaling property is not changed */
4692 return 0;
4693 }
4694 intel_connector->panel.fitting_mode = val;
4695
4696 goto done;
4697 }
4698
f684960e
CW		 4699 return -EINVAL;
4700
4701done:
c0c36b94
CW		 4702 if (intel_encoder->base.crtc)
4703 intel_crtc_restore_mode(intel_encoder->base.crtc);
f684960e
CW		 4704
4705 return 0;
4706}
4707
a4fc5ed6 4708static void
73845adf 4709intel_dp_connector_destroy(struct drm_connector *connector)
a4fc5ed6 4710{
1d508706 4711 struct intel_connector *intel_connector = to_intel_connector(connector);
aaa6fd2a 4712
10e972d3 4713 kfree(intel_connector->detect_edid);
beb60608 4714
9cd300e0
JN		 4715 if (!IS_ERR_OR_NULL(intel_connector->edid))
4716 kfree(intel_connector->edid);
4717
acd8db10
PZ		 4718 /* Can't call is_edp() since the encoder may have been destroyed
4719 * already. */
4720 if (connector->connector_type == DRM_MODE_CONNECTOR_eDP)
1d508706 4721 intel_panel_fini(&intel_connector->panel);
aaa6fd2a 4722
a4fc5ed6 4723 drm_connector_cleanup(connector);
55f78c43 4724 kfree(connector);
a4fc5ed6
KP		 4725}
4726
00c09d70 4727void intel_dp_encoder_destroy(struct drm_encoder *encoder)
24d05927 4728{
da63a9f2
PZ		 4729 struct intel_digital_port *intel_dig_port = enc_to_dig_port(encoder);
4730 struct intel_dp *intel_dp = &intel_dig_port->dp;
24d05927 4731
4f71d0cb 4732 drm_dp_aux_unregister(&intel_dp->aux);
0e32b39c 4733 intel_dp_mst_encoder_cleanup(intel_dig_port);
bd943159
KP		 4734 if (is_edp(intel_dp)) {
4735 cancel_delayed_work_sync(&intel_dp->panel_vdd_work);
951468f3
VS		 4736 /*
4737 * vdd might still be enabled do to the delayed vdd off.
4738 * Make sure vdd is actually turned off here.
4739 */
773538e8 4740 pps_lock(intel_dp);
4be73780 4741 edp_panel_vdd_off_sync(intel_dp);
773538e8
VS		 4742 pps_unlock(intel_dp);
4743
01527b31
CT		 4744 if (intel_dp->edp_notifier.notifier_call) {
4745 unregister_reboot_notifier(&intel_dp->edp_notifier);
4746 intel_dp->edp_notifier.notifier_call = NULL;
4747 }
bd943159 4748 }
c8bd0e49 4749 drm_encoder_cleanup(encoder);
da63a9f2 4750 kfree(intel_dig_port);
24d05927
DV		 4751}
4752
07f9cd0b
ID		 4753static void intel_dp_encoder_suspend(struct intel_encoder *intel_encoder)
4754{
4755 struct intel_dp *intel_dp = enc_to_intel_dp(&intel_encoder->base);
4756
4757 if (!is_edp(intel_dp))
4758 return;
4759
951468f3
VS		 4760 /*
4761 * vdd might still be enabled do to the delayed vdd off.
4762 * Make sure vdd is actually turned off here.
4763 */
afa4e53a 4764 cancel_delayed_work_sync(&intel_dp->panel_vdd_work);
773538e8 4765 pps_lock(intel_dp);
07f9cd0b 4766 edp_panel_vdd_off_sync(intel_dp);
773538e8 4767 pps_unlock(intel_dp);
07f9cd0b
ID		 4768}
4769
49e6bc51
VS		 4770static void intel_edp_panel_vdd_sanitize(struct intel_dp *intel_dp)
4771{
4772 struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp);
4773 struct drm_device *dev = intel_dig_port->base.base.dev;
4774 struct drm_i915_private *dev_priv = dev->dev_private;
4775 enum intel_display_power_domain power_domain;
4776
4777 lockdep_assert_held(&dev_priv->pps_mutex);
4778
4779 if (!edp_have_panel_vdd(intel_dp))
4780 return;
4781
4782 /*
4783 * The VDD bit needs a power domain reference, so if the bit is
4784 * already enabled when we boot or resume, grab this reference and
4785 * schedule a vdd off, so we don't hold on to the reference
4786 * indefinitely.
4787 */
4788 DRM_DEBUG_KMS("VDD left on by BIOS, adjusting state tracking\n");
4789 power_domain = intel_display_port_power_domain(&intel_dig_port->base);
4790 intel_display_power_get(dev_priv, power_domain);
4791
4792 edp_panel_vdd_schedule_off(intel_dp);
4793}
4794
6d93c0c4
ID		 4795static void intel_dp_encoder_reset(struct drm_encoder *encoder)
4796{
49e6bc51
VS		 4797 struct intel_dp *intel_dp;
4798
4799 if (to_intel_encoder(encoder)->type != INTEL_OUTPUT_EDP)
4800 return;
4801
4802 intel_dp = enc_to_intel_dp(encoder);
4803
4804 pps_lock(intel_dp);
4805
4806 /*
4807 * Read out the current power sequencer assignment,
4808 * in case the BIOS did something with it.
4809 */
4810 if (IS_VALLEYVIEW(encoder->dev))
4811 vlv_initial_power_sequencer_setup(intel_dp);
4812
4813 intel_edp_panel_vdd_sanitize(intel_dp);
4814
4815 pps_unlock(intel_dp);
6d93c0c4
ID		 4816}
4817
a4fc5ed6 4818static const struct drm_connector_funcs intel_dp_connector_funcs = {
4d688a2a 4819 .dpms = drm_atomic_helper_connector_dpms,
a4fc5ed6 4820 .detect = intel_dp_detect,
beb60608 4821 .force = intel_dp_force,
a4fc5ed6 4822 .fill_modes = drm_helper_probe_single_connector_modes,
f684960e 4823 .set_property = intel_dp_set_property,
2545e4a6 4824 .atomic_get_property = intel_connector_atomic_get_property,
73845adf 4825 .destroy = intel_dp_connector_destroy,
c6f95f27 4826 .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
98969725 4827 .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
a4fc5ed6
KP		 4828};
4829
4830static const struct drm_connector_helper_funcs intel_dp_connector_helper_funcs = {
4831 .get_modes = intel_dp_get_modes,
4832 .mode_valid = intel_dp_mode_valid,
df0e9248 4833 .best_encoder = intel_best_encoder,
a4fc5ed6
KP		 4834};
4835
a4fc5ed6 4836static const struct drm_encoder_funcs intel_dp_enc_funcs = {
6d93c0c4 4837 .reset = intel_dp_encoder_reset,
24d05927 4838 .destroy = intel_dp_encoder_destroy,
a4fc5ed6
KP		 4839};
4840
b2c5c181 4841enum irqreturn
13cf5504
DA		 4842intel_dp_hpd_pulse(struct intel_digital_port *intel_dig_port, bool long_hpd)
4843{
4844 struct intel_dp *intel_dp = &intel_dig_port->dp;
1c767b33 4845 struct intel_encoder *intel_encoder = &intel_dig_port->base;
0e32b39c
DA		 4846 struct drm_device *dev = intel_dig_port->base.base.dev;
4847 struct drm_i915_private *dev_priv = dev->dev_private;
1c767b33 4848 enum intel_display_power_domain power_domain;
b2c5c181 4849 enum irqreturn ret = IRQ_NONE;
1c767b33 4850
0e32b39c
DA		 4851 if (intel_dig_port->base.type != INTEL_OUTPUT_EDP)
4852 intel_dig_port->base.type = INTEL_OUTPUT_DISPLAYPORT;
13cf5504 4853
7a7f84cc
VS		 4854 if (long_hpd && intel_dig_port->base.type == INTEL_OUTPUT_EDP) {
4855 /*
4856 * vdd off can generate a long pulse on eDP which
4857 * would require vdd on to handle it, and thus we
4858 * would end up in an endless cycle of
4859 * "vdd off -> long hpd -> vdd on -> detect -> vdd off -> ..."
4860 */
4861 DRM_DEBUG_KMS("ignoring long hpd on eDP port %c\n",
4862 port_name(intel_dig_port->port));
a8b3d52f 4863 return IRQ_HANDLED;
7a7f84cc
VS		 4864 }
4865
26fbb774
VS		 4866 DRM_DEBUG_KMS("got hpd irq on port %c - %s\n",
4867 port_name(intel_dig_port->port),
0e32b39c 4868 long_hpd ? "long" : "short");
13cf5504 4869
1c767b33
ID		 4870 power_domain = intel_display_port_power_domain(intel_encoder);
4871 intel_display_power_get(dev_priv, power_domain);
4872
0e32b39c 4873 if (long_hpd) {
5fa836a9
MK		 4874 /* indicate that we need to restart link training */
4875 intel_dp->train_set_valid = false;
2a592bec 4876
7e66bcf2
JN		 4877 if (!intel_digital_port_connected(dev_priv, intel_dig_port))
4878 goto mst_fail;
0e32b39c
DA		 4879
4880 if (!intel_dp_get_dpcd(intel_dp)) {
4881 goto mst_fail;
4882 }
4883
4884 intel_dp_probe_oui(intel_dp);
4885
d14e7b6d
VS		 4886 if (!intel_dp_probe_mst(intel_dp)) {
4887 drm_modeset_lock(&dev->mode_config.connection_mutex, NULL);
4888 intel_dp_check_link_status(intel_dp);
4889 drm_modeset_unlock(&dev->mode_config.connection_mutex);
0e32b39c 4890 goto mst_fail;
d14e7b6d 4891 }
0e32b39c
DA		 4892 } else {
4893 if (intel_dp->is_mst) {
1c767b33 4894 if (intel_dp_check_mst_status(intel_dp) == -EINVAL)
0e32b39c
DA		 4895 goto mst_fail;
4896 }
4897
4898 if (!intel_dp->is_mst) {
5b215bcf 4899 drm_modeset_lock(&dev->mode_config.connection_mutex, NULL);
0e32b39c 4900 intel_dp_check_link_status(intel_dp);
5b215bcf 4901 drm_modeset_unlock(&dev->mode_config.connection_mutex);
0e32b39c
DA		 4902 }
4903 }
b2c5c181
DV		 4904
4905 ret = IRQ_HANDLED;
4906
1c767b33 4907 goto put_power;
0e32b39c
DA		 4908mst_fail:
4909 /* if we were in MST mode, and device is not there get out of MST mode */
4910 if (intel_dp->is_mst) {
4911 DRM_DEBUG_KMS("MST device may have disappeared %d vs %d\n", intel_dp->is_mst, intel_dp->mst_mgr.mst_state);
4912 intel_dp->is_mst = false;
4913 drm_dp_mst_topology_mgr_set_mst(&intel_dp->mst_mgr, intel_dp->is_mst);
4914 }
1c767b33
ID		 4915put_power:
4916 intel_display_power_put(dev_priv, power_domain);
4917
4918 return ret;
13cf5504
DA		 4919}
4920
e3421a18
ZW		 4921/* Return which DP Port should be selected for Transcoder DP control */
4922int
0206e353 4923intel_trans_dp_port_sel(struct drm_crtc *crtc)
e3421a18
ZW		 4924{
4925 struct drm_device *dev = crtc->dev;
fa90ecef
PZ		 4926 struct intel_encoder *intel_encoder;
4927 struct intel_dp *intel_dp;
e3421a18 4928
fa90ecef
PZ		 4929 for_each_encoder_on_crtc(dev, crtc, intel_encoder) {
4930 intel_dp = enc_to_intel_dp(&intel_encoder->base);
e3421a18 4931
fa90ecef
PZ		 4932 if (intel_encoder->type == INTEL_OUTPUT_DISPLAYPORT ||
4933 intel_encoder->type == INTEL_OUTPUT_EDP)
ea5b213a 4934 return intel_dp->output_reg;
e3421a18 4935 }
ea5b213a 4936
e3421a18
ZW		 4937 return -1;
4938}
4939
477ec328 4940/* check the VBT to see whether the eDP is on another port */
5d8a7752 4941bool intel_dp_is_edp(struct drm_device *dev, enum port port)
36e83a18
ZY		 4942{
4943 struct drm_i915_private *dev_priv = dev->dev_private;
768f69c9 4944 union child_device_config *p_child;
36e83a18 4945 int i;
5d8a7752 4946 static const short port_mapping[] = {
477ec328
RV		 4947 [PORT_B] = DVO_PORT_DPB,
4948 [PORT_C] = DVO_PORT_DPC,
4949 [PORT_D] = DVO_PORT_DPD,
4950 [PORT_E] = DVO_PORT_DPE,
5d8a7752 4951 };
36e83a18 4952
53ce81a7
VS		 4953 /*
4954 * eDP not supported on g4x. so bail out early just
4955 * for a bit extra safety in case the VBT is bonkers.
4956 */
4957 if (INTEL_INFO(dev)->gen < 5)
4958 return false;
4959
3b32a35b
VS		 4960 if (port == PORT_A)
4961 return true;
4962
41aa3448 4963 if (!dev_priv->vbt.child_dev_num)
36e83a18
ZY		 4964 return false;
4965
41aa3448
RV		 4966 for (i = 0; i < dev_priv->vbt.child_dev_num; i++) {
4967 p_child = dev_priv->vbt.child_dev + i;
36e83a18 4968
5d8a7752 4969 if (p_child->common.dvo_port == port_mapping[port] &&
f02586df
VS		 4970 (p_child->common.device_type & DEVICE_TYPE_eDP_BITS) ==
4971 (DEVICE_TYPE_eDP & DEVICE_TYPE_eDP_BITS))
36e83a18
ZY		 4972 return true;
4973 }
4974 return false;
4975}
4976
0e32b39c 4977void
f684960e
CW		 4978intel_dp_add_properties(struct intel_dp *intel_dp, struct drm_connector *connector)
4979{
53b41837
YN		 4980 struct intel_connector *intel_connector = to_intel_connector(connector);
4981
3f43c48d 4982 intel_attach_force_audio_property(connector);
e953fd7b 4983 intel_attach_broadcast_rgb_property(connector);
55bc60db 4984 intel_dp->color_range_auto = true;
53b41837
YN		 4985
4986 if (is_edp(intel_dp)) {
4987 drm_mode_create_scaling_mode_property(connector->dev);
6de6d846
RC		 4988 drm_object_attach_property(
4989 &connector->base,
53b41837 4990 connector->dev->mode_config.scaling_mode_property,
8e740cd1
YN		 4991 DRM_MODE_SCALE_ASPECT);
4992 intel_connector->panel.fitting_mode = DRM_MODE_SCALE_ASPECT;
53b41837 4993 }
f684960e
CW		 4994}
4995
dada1a9f
ID		 4996static void intel_dp_init_panel_power_timestamps(struct intel_dp *intel_dp)
4997{
4998 intel_dp->last_power_cycle = jiffies;
4999 intel_dp->last_power_on = jiffies;
5000 intel_dp->last_backlight_off = jiffies;
5001}
5002
67a54566
DV		 5003static void
5004intel_dp_init_panel_power_sequencer(struct drm_device *dev,
36b5f425 5005 struct intel_dp *intel_dp)
67a54566
DV		 5006{
5007 struct drm_i915_private *dev_priv = dev->dev_private;
36b5f425
VS		 5008 struct edp_power_seq cur, vbt, spec,
5009 *final = &intel_dp->pps_delays;
b0a08bec
VK		 5010 u32 pp_on, pp_off, pp_div = 0, pp_ctl = 0;
5011 int pp_ctrl_reg, pp_on_reg, pp_off_reg, pp_div_reg = 0;
453c5420 5012
e39b999a
VS		 5013 lockdep_assert_held(&dev_priv->pps_mutex);
5014
81ddbc69
VS		 5015 /* already initialized? */
5016 if (final->t11_t12 != 0)
5017 return;
5018
b0a08bec
VK		 5019 if (IS_BROXTON(dev)) {
5020 /*
5021 * TODO: BXT has 2 sets of PPS registers.
5022 * Correct Register for Broxton need to be identified
5023 * using VBT. hardcoding for now
5024 */
5025 pp_ctrl_reg = BXT_PP_CONTROL(0);
5026 pp_on_reg = BXT_PP_ON_DELAYS(0);
5027 pp_off_reg = BXT_PP_OFF_DELAYS(0);
5028 } else if (HAS_PCH_SPLIT(dev)) {
bf13e81b 5029 pp_ctrl_reg = PCH_PP_CONTROL;
453c5420
JB		 5030 pp_on_reg = PCH_PP_ON_DELAYS;
5031 pp_off_reg = PCH_PP_OFF_DELAYS;
5032 pp_div_reg = PCH_PP_DIVISOR;
5033 } else {
bf13e81b
JN		 5034 enum pipe pipe = vlv_power_sequencer_pipe(intel_dp);
5035
5036 pp_ctrl_reg = VLV_PIPE_PP_CONTROL(pipe);
5037 pp_on_reg = VLV_PIPE_PP_ON_DELAYS(pipe);
5038 pp_off_reg = VLV_PIPE_PP_OFF_DELAYS(pipe);
5039 pp_div_reg = VLV_PIPE_PP_DIVISOR(pipe);
453c5420 5040 }
67a54566
DV		 5041
5042 /* Workaround: Need to write PP_CONTROL with the unlock key as
5043 * the very first thing. */
b0a08bec 5044 pp_ctl = ironlake_get_pp_control(intel_dp);
67a54566 5045
453c5420
JB		 5046 pp_on = I915_READ(pp_on_reg);
5047 pp_off = I915_READ(pp_off_reg);
b0a08bec
VK		 5048 if (!IS_BROXTON(dev)) {
5049 I915_WRITE(pp_ctrl_reg, pp_ctl);
5050 pp_div = I915_READ(pp_div_reg);
5051 }
67a54566
DV		 5052
5053 /* Pull timing values out of registers */
5054 cur.t1_t3 = (pp_on & PANEL_POWER_UP_DELAY_MASK) >>
5055 PANEL_POWER_UP_DELAY_SHIFT;
5056
5057 cur.t8 = (pp_on & PANEL_LIGHT_ON_DELAY_MASK) >>
5058 PANEL_LIGHT_ON_DELAY_SHIFT;
5059
5060 cur.t9 = (pp_off & PANEL_LIGHT_OFF_DELAY_MASK) >>
5061 PANEL_LIGHT_OFF_DELAY_SHIFT;
5062
5063 cur.t10 = (pp_off & PANEL_POWER_DOWN_DELAY_MASK) >>
5064 PANEL_POWER_DOWN_DELAY_SHIFT;
5065
b0a08bec
VK		 5066 if (IS_BROXTON(dev)) {
5067 u16 tmp = (pp_ctl & BXT_POWER_CYCLE_DELAY_MASK) >>
5068 BXT_POWER_CYCLE_DELAY_SHIFT;
5069 if (tmp > 0)
5070 cur.t11_t12 = (tmp - 1) * 1000;
5071 else
5072 cur.t11_t12 = 0;
5073 } else {
5074 cur.t11_t12 = ((pp_div & PANEL_POWER_CYCLE_DELAY_MASK) >>
67a54566 5075 PANEL_POWER_CYCLE_DELAY_SHIFT) * 1000;
b0a08bec 5076 }
67a54566
DV		 5077
5078 DRM_DEBUG_KMS("cur t1_t3 %d t8 %d t9 %d t10 %d t11_t12 %d\n",
5079 cur.t1_t3, cur.t8, cur.t9, cur.t10, cur.t11_t12);
5080
41aa3448 5081 vbt = dev_priv->vbt.edp_pps;
67a54566
DV		 5082
5083 /* Upper limits from eDP 1.3 spec. Note that we use the clunky units of
5084 * our hw here, which are all in 100usec. */
5085 spec.t1_t3 = 210 * 10;
5086 spec.t8 = 50 * 10; /* no limit for t8, use t7 instead */
5087 spec.t9 = 50 * 10; /* no limit for t9, make it symmetric with t8 */
5088 spec.t10 = 500 * 10;
5089 /* This one is special and actually in units of 100ms, but zero
5090 * based in the hw (so we need to add 100 ms). But the sw vbt
5091 * table multiplies it with 1000 to make it in units of 100usec,
5092 * too. */
5093 spec.t11_t12 = (510 + 100) * 10;
5094
5095 DRM_DEBUG_KMS("vbt t1_t3 %d t8 %d t9 %d t10 %d t11_t12 %d\n",
5096 vbt.t1_t3, vbt.t8, vbt.t9, vbt.t10, vbt.t11_t12);
5097
5098 /* Use the max of the register settings and vbt. If both are
5099 * unset, fall back to the spec limits. */
36b5f425 5100#define assign_final(field) final->field = (max(cur.field, vbt.field) == 0 ? \
67a54566
DV		 5101 spec.field : \
5102 max(cur.field, vbt.field))
5103 assign_final(t1_t3);
5104 assign_final(t8);
5105 assign_final(t9);
5106 assign_final(t10);
5107 assign_final(t11_t12);
5108#undef assign_final
5109
36b5f425 5110#define get_delay(field) (DIV_ROUND_UP(final->field, 10))
67a54566
DV		 5111 intel_dp->panel_power_up_delay = get_delay(t1_t3);
5112 intel_dp->backlight_on_delay = get_delay(t8);
5113 intel_dp->backlight_off_delay = get_delay(t9);
5114 intel_dp->panel_power_down_delay = get_delay(t10);
5115 intel_dp->panel_power_cycle_delay = get_delay(t11_t12);
5116#undef get_delay
5117
f30d26e4
JN		 5118 DRM_DEBUG_KMS("panel power up delay %d, power down delay %d, power cycle delay %d\n",
5119 intel_dp->panel_power_up_delay, intel_dp->panel_power_down_delay,
5120 intel_dp->panel_power_cycle_delay);
5121
5122 DRM_DEBUG_KMS("backlight on delay %d, off delay %d\n",
5123 intel_dp->backlight_on_delay, intel_dp->backlight_off_delay);
f30d26e4
JN		 5124}
5125
5126static void
5127intel_dp_init_panel_power_sequencer_registers(struct drm_device *dev,
36b5f425 5128 struct intel_dp *intel_dp)
f30d26e4
JN		 5129{
5130 struct drm_i915_private *dev_priv = dev->dev_private;
453c5420
JB		 5131 u32 pp_on, pp_off, pp_div, port_sel = 0;
5132 int div = HAS_PCH_SPLIT(dev) ? intel_pch_rawclk(dev) : intel_hrawclk(dev);
b0a08bec 5133 int pp_on_reg, pp_off_reg, pp_div_reg = 0, pp_ctrl_reg;
ad933b56 5134 enum port port = dp_to_dig_port(intel_dp)->port;
36b5f425 5135 const struct edp_power_seq *seq = &intel_dp->pps_delays;
453c5420 5136
e39b999a 5137 lockdep_assert_held(&dev_priv->pps_mutex);
453c5420 5138
b0a08bec
VK		 5139 if (IS_BROXTON(dev)) {
5140 /*
5141 * TODO: BXT has 2 sets of PPS registers.
5142 * Correct Register for Broxton need to be identified
5143 * using VBT. hardcoding for now
5144 */
5145 pp_ctrl_reg = BXT_PP_CONTROL(0);
5146 pp_on_reg = BXT_PP_ON_DELAYS(0);
5147 pp_off_reg = BXT_PP_OFF_DELAYS(0);
5148
5149 } else if (HAS_PCH_SPLIT(dev)) {
453c5420
JB		 5150 pp_on_reg = PCH_PP_ON_DELAYS;
5151 pp_off_reg = PCH_PP_OFF_DELAYS;
5152 pp_div_reg = PCH_PP_DIVISOR;
5153 } else {
bf13e81b
JN		 5154 enum pipe pipe = vlv_power_sequencer_pipe(intel_dp);
5155
5156 pp_on_reg = VLV_PIPE_PP_ON_DELAYS(pipe);
5157 pp_off_reg = VLV_PIPE_PP_OFF_DELAYS(pipe);
5158 pp_div_reg = VLV_PIPE_PP_DIVISOR(pipe);
453c5420
JB		 5159 }
5160
b2f19d1a
PZ		 5161 /*
5162 * And finally store the new values in the power sequencer. The
5163 * backlight delays are set to 1 because we do manual waits on them. For
5164 * T8, even BSpec recommends doing it. For T9, if we don't do this,
5165 * we'll end up waiting for the backlight off delay twice: once when we
5166 * do the manual sleep, and once when we disable the panel and wait for
5167 * the PP_STATUS bit to become zero.
5168 */
f30d26e4 5169 pp_on = (seq->t1_t3 << PANEL_POWER_UP_DELAY_SHIFT) |
b2f19d1a
PZ		 5170 (1 << PANEL_LIGHT_ON_DELAY_SHIFT);
5171 pp_off = (1 << PANEL_LIGHT_OFF_DELAY_SHIFT) |
f30d26e4 5172 (seq->t10 << PANEL_POWER_DOWN_DELAY_SHIFT);
67a54566
DV		 5173 /* Compute the divisor for the pp clock, simply match the Bspec
5174 * formula. */
b0a08bec
VK		 5175 if (IS_BROXTON(dev)) {
5176 pp_div = I915_READ(pp_ctrl_reg);
5177 pp_div &= ~BXT_POWER_CYCLE_DELAY_MASK;
5178 pp_div |= (DIV_ROUND_UP((seq->t11_t12 + 1), 1000)
5179 << BXT_POWER_CYCLE_DELAY_SHIFT);
5180 } else {
5181 pp_div = ((100 * div)/2 - 1) << PP_REFERENCE_DIVIDER_SHIFT;
5182 pp_div |= (DIV_ROUND_UP(seq->t11_t12, 1000)
5183 << PANEL_POWER_CYCLE_DELAY_SHIFT);
5184 }
67a54566
DV		 5185
5186 /* Haswell doesn't have any port selection bits for the panel
5187 * power sequencer any more. */
bc7d38a4 5188 if (IS_VALLEYVIEW(dev)) {
ad933b56 5189 port_sel = PANEL_PORT_SELECT_VLV(port);
bc7d38a4 5190 } else if (HAS_PCH_IBX(dev) || HAS_PCH_CPT(dev)) {
ad933b56 5191 if (port == PORT_A)
a24c144c 5192 port_sel = PANEL_PORT_SELECT_DPA;
67a54566 5193 else
a24c144c 5194 port_sel = PANEL_PORT_SELECT_DPD;
67a54566
DV		 5195 }
5196
453c5420
JB		 5197 pp_on |= port_sel;
5198
5199 I915_WRITE(pp_on_reg, pp_on);
5200 I915_WRITE(pp_off_reg, pp_off);
b0a08bec
VK		 5201 if (IS_BROXTON(dev))
5202 I915_WRITE(pp_ctrl_reg, pp_div);
5203 else
5204 I915_WRITE(pp_div_reg, pp_div);
67a54566 5205
67a54566 5206 DRM_DEBUG_KMS("panel power sequencer register settings: PP_ON %#x, PP_OFF %#x, PP_DIV %#x\n",
453c5420
JB		 5207 I915_READ(pp_on_reg),
5208 I915_READ(pp_off_reg),
b0a08bec
VK		 5209 IS_BROXTON(dev) ?
5210 (I915_READ(pp_ctrl_reg) & BXT_POWER_CYCLE_DELAY_MASK) :
453c5420 5211 I915_READ(pp_div_reg));
f684960e
CW		 5212}
5213
b33a2815
VK		 5214/**
5215 * intel_dp_set_drrs_state - program registers for RR switch to take effect
5216 * @dev: DRM device
5217 * @refresh_rate: RR to be programmed
5218 *
5219 * This function gets called when refresh rate (RR) has to be changed from
5220 * one frequency to another. Switches can be between high and low RR
5221 * supported by the panel or to any other RR based on media playback (in
5222 * this case, RR value needs to be passed from user space).
5223 *
5224 * The caller of this function needs to take a lock on dev_priv->drrs.
5225 */
96178eeb 5226static void intel_dp_set_drrs_state(struct drm_device *dev, int refresh_rate)
439d7ac0
PB		 5227{
5228 struct drm_i915_private *dev_priv = dev->dev_private;
5229 struct intel_encoder *encoder;
96178eeb
VK		 5230 struct intel_digital_port *dig_port = NULL;
5231 struct intel_dp *intel_dp = dev_priv->drrs.dp;
5cec258b 5232 struct intel_crtc_state *config = NULL;
439d7ac0 5233 struct intel_crtc *intel_crtc = NULL;
96178eeb 5234 enum drrs_refresh_rate_type index = DRRS_HIGH_RR;
439d7ac0
PB		 5235
5236 if (refresh_rate <= 0) {
5237 DRM_DEBUG_KMS("Refresh rate should be positive non-zero.\n");
5238 return;
5239 }
5240
96178eeb
VK		 5241 if (intel_dp == NULL) {
5242 DRM_DEBUG_KMS("DRRS not supported.\n");
439d7ac0
PB		 5243 return;
5244 }
5245
1fcc9d1c 5246 /*
e4d59f6b
RV		 5247 * FIXME: This needs proper synchronization with psr state for some
5248 * platforms that cannot have PSR and DRRS enabled at the same time.
1fcc9d1c 5249 */
439d7ac0 5250
96178eeb
VK		 5251 dig_port = dp_to_dig_port(intel_dp);
5252 encoder = &dig_port->base;
723f9aab 5253 intel_crtc = to_intel_crtc(encoder->base.crtc);
439d7ac0
PB		 5254
5255 if (!intel_crtc) {
5256 DRM_DEBUG_KMS("DRRS: intel_crtc not initialized\n");
5257 return;
5258 }
5259
6e3c9717 5260 config = intel_crtc->config;
439d7ac0 5261
96178eeb 5262 if (dev_priv->drrs.type < SEAMLESS_DRRS_SUPPORT) {
439d7ac0
PB		 5263 DRM_DEBUG_KMS("Only Seamless DRRS supported.\n");
5264 return;
5265 }
5266
96178eeb
VK		 5267 if (intel_dp->attached_connector->panel.downclock_mode->vrefresh ==
5268 refresh_rate)
439d7ac0
PB		 5269 index = DRRS_LOW_RR;
5270
96178eeb 5271 if (index == dev_priv->drrs.refresh_rate_type) {
439d7ac0
PB		 5272 DRM_DEBUG_KMS(
5273 "DRRS requested for previously set RR...ignoring\n");
5274 return;
5275 }
5276
5277 if (!intel_crtc->active) {
5278 DRM_DEBUG_KMS("eDP encoder disabled. CRTC not Active\n");
5279 return;
5280 }
5281
44395bfe 5282 if (INTEL_INFO(dev)->gen >= 8 && !IS_CHERRYVIEW(dev)) {
a4c30b1d
VK		 5283 switch (index) {
5284 case DRRS_HIGH_RR:
5285 intel_dp_set_m_n(intel_crtc, M1_N1);
5286 break;
5287 case DRRS_LOW_RR:
5288 intel_dp_set_m_n(intel_crtc, M2_N2);
5289 break;
5290 case DRRS_MAX_RR:
5291 default:
5292 DRM_ERROR("Unsupported refreshrate type\n");
5293 }
5294 } else if (INTEL_INFO(dev)->gen > 6) {
649636ef
VS		 5295 u32 reg = PIPECONF(intel_crtc->config->cpu_transcoder);
5296 u32 val;
a4c30b1d 5297
649636ef 5298 val = I915_READ(reg);
439d7ac0 5299 if (index > DRRS_HIGH_RR) {
6fa7aec1
VK		 5300 if (IS_VALLEYVIEW(dev))
5301 val |= PIPECONF_EDP_RR_MODE_SWITCH_VLV;
5302 else
5303 val |= PIPECONF_EDP_RR_MODE_SWITCH;
439d7ac0 5304 } else {
6fa7aec1
VK		 5305 if (IS_VALLEYVIEW(dev))
5306 val &= ~PIPECONF_EDP_RR_MODE_SWITCH_VLV;
5307 else
5308 val &= ~PIPECONF_EDP_RR_MODE_SWITCH;
439d7ac0
PB		 5309 }
5310 I915_WRITE(reg, val);
5311 }
5312
4e9ac947
VK		 5313 dev_priv->drrs.refresh_rate_type = index;
5314
5315 DRM_DEBUG_KMS("eDP Refresh Rate set to : %dHz\n", refresh_rate);
5316}
5317
b33a2815
VK		 5318/**
5319 * intel_edp_drrs_enable - init drrs struct if supported
5320 * @intel_dp: DP struct
5321 *
5322 * Initializes frontbuffer_bits and drrs.dp
5323 */
c395578e
VK		 5324void intel_edp_drrs_enable(struct intel_dp *intel_dp)
5325{
5326 struct drm_device *dev = intel_dp_to_dev(intel_dp);
5327 struct drm_i915_private *dev_priv = dev->dev_private;
5328 struct intel_digital_port *dig_port = dp_to_dig_port(intel_dp);
5329 struct drm_crtc *crtc = dig_port->base.base.crtc;
5330 struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
5331
5332 if (!intel_crtc->config->has_drrs) {
5333 DRM_DEBUG_KMS("Panel doesn't support DRRS\n");
5334 return;
5335 }
5336
5337 mutex_lock(&dev_priv->drrs.mutex);
5338 if (WARN_ON(dev_priv->drrs.dp)) {
5339 DRM_ERROR("DRRS already enabled\n");
5340 goto unlock;
5341 }
5342
5343 dev_priv->drrs.busy_frontbuffer_bits = 0;
5344
5345 dev_priv->drrs.dp = intel_dp;
5346
5347unlock:
5348 mutex_unlock(&dev_priv->drrs.mutex);
5349}
5350
b33a2815
VK		 5351/**
5352 * intel_edp_drrs_disable - Disable DRRS
5353 * @intel_dp: DP struct
5354 *
5355 */
c395578e
VK		 5356void intel_edp_drrs_disable(struct intel_dp *intel_dp)
5357{
5358 struct drm_device *dev = intel_dp_to_dev(intel_dp);
5359 struct drm_i915_private *dev_priv = dev->dev_private;
5360 struct intel_digital_port *dig_port = dp_to_dig_port(intel_dp);
5361 struct drm_crtc *crtc = dig_port->base.base.crtc;
5362 struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
5363
5364 if (!intel_crtc->config->has_drrs)
5365 return;
5366
5367 mutex_lock(&dev_priv->drrs.mutex);
5368 if (!dev_priv->drrs.dp) {
5369 mutex_unlock(&dev_priv->drrs.mutex);
5370 return;
5371 }
5372
5373 if (dev_priv->drrs.refresh_rate_type == DRRS_LOW_RR)
5374 intel_dp_set_drrs_state(dev_priv->dev,
5375 intel_dp->attached_connector->panel.
5376 fixed_mode->vrefresh);
5377
5378 dev_priv->drrs.dp = NULL;
5379 mutex_unlock(&dev_priv->drrs.mutex);
5380
5381 cancel_delayed_work_sync(&dev_priv->drrs.work);
5382}
5383
4e9ac947
VK		 5384static void intel_edp_drrs_downclock_work(struct work_struct *work)
5385{
5386 struct drm_i915_private *dev_priv =
5387 container_of(work, typeof(*dev_priv), drrs.work.work);
5388 struct intel_dp *intel_dp;
5389
5390 mutex_lock(&dev_priv->drrs.mutex);
5391
5392 intel_dp = dev_priv->drrs.dp;
5393
5394 if (!intel_dp)
5395 goto unlock;
5396
439d7ac0 5397 /*
4e9ac947
VK		 5398 * The delayed work can race with an invalidate hence we need to
5399 * recheck.
439d7ac0
PB		 5400 */
5401
4e9ac947
VK		 5402 if (dev_priv->drrs.busy_frontbuffer_bits)
5403 goto unlock;
439d7ac0 5404
4e9ac947
VK		 5405 if (dev_priv->drrs.refresh_rate_type != DRRS_LOW_RR)
5406 intel_dp_set_drrs_state(dev_priv->dev,
5407 intel_dp->attached_connector->panel.
5408 downclock_mode->vrefresh);
439d7ac0 5409
4e9ac947 5410unlock:
4e9ac947 5411 mutex_unlock(&dev_priv->drrs.mutex);
439d7ac0
PB		 5412}
5413
b33a2815 5414/**
0ddfd203 5415 * intel_edp_drrs_invalidate - Disable Idleness DRRS
b33a2815
VK		 5416 * @dev: DRM device
5417 * @frontbuffer_bits: frontbuffer plane tracking bits
5418 *
0ddfd203
R		 5419 * This function gets called everytime rendering on the given planes start.
5420 * Hence DRRS needs to be Upclocked, i.e. (LOW_RR -> HIGH_RR).
b33a2815
VK		 5421 *
5422 * Dirty frontbuffers relevant to DRRS are tracked in busy_frontbuffer_bits.
5423 */
a93fad0f
VK		 5424void intel_edp_drrs_invalidate(struct drm_device *dev,
5425 unsigned frontbuffer_bits)
5426{
5427 struct drm_i915_private *dev_priv = dev->dev_private;
5428 struct drm_crtc *crtc;
5429 enum pipe pipe;
5430
9da7d693 5431 if (dev_priv->drrs.type == DRRS_NOT_SUPPORTED)
a93fad0f
VK		 5432 return;
5433
88f933a8 5434 cancel_delayed_work(&dev_priv->drrs.work);
3954e733 5435
a93fad0f 5436 mutex_lock(&dev_priv->drrs.mutex);
9da7d693
DV		 5437 if (!dev_priv->drrs.dp) {
5438 mutex_unlock(&dev_priv->drrs.mutex);
5439 return;
5440 }
5441
a93fad0f
VK		 5442 crtc = dp_to_dig_port(dev_priv->drrs.dp)->base.base.crtc;
5443 pipe = to_intel_crtc(crtc)->pipe;
5444
c1d038c6
DV		 5445 frontbuffer_bits &= INTEL_FRONTBUFFER_ALL_MASK(pipe);
5446 dev_priv->drrs.busy_frontbuffer_bits |= frontbuffer_bits;
5447
0ddfd203 5448 /* invalidate means busy screen hence upclock */
c1d038c6 5449 if (frontbuffer_bits && dev_priv->drrs.refresh_rate_type == DRRS_LOW_RR)
a93fad0f
VK		 5450 intel_dp_set_drrs_state(dev_priv->dev,
5451 dev_priv->drrs.dp->attached_connector->panel.
5452 fixed_mode->vrefresh);
a93fad0f 5453
a93fad0f
VK		 5454 mutex_unlock(&dev_priv->drrs.mutex);
5455}
5456
b33a2815 5457/**
0ddfd203 5458 * intel_edp_drrs_flush - Restart Idleness DRRS
b33a2815
VK		 5459 * @dev: DRM device
5460 * @frontbuffer_bits: frontbuffer plane tracking bits
5461 *
0ddfd203
R		 5462 * This function gets called every time rendering on the given planes has
5463 * completed or flip on a crtc is completed. So DRRS should be upclocked
5464 * (LOW_RR -> HIGH_RR). And also Idleness detection should be started again,
5465 * if no other planes are dirty.
b33a2815
VK		 5466 *
5467 * Dirty frontbuffers relevant to DRRS are tracked in busy_frontbuffer_bits.
5468 */
a93fad0f
VK		 5469void intel_edp_drrs_flush(struct drm_device *dev,
5470 unsigned frontbuffer_bits)
5471{
5472 struct drm_i915_private *dev_priv = dev->dev_private;
5473 struct drm_crtc *crtc;
5474 enum pipe pipe;
5475
9da7d693 5476 if (dev_priv->drrs.type == DRRS_NOT_SUPPORTED)
a93fad0f
VK		 5477 return;
5478
88f933a8 5479 cancel_delayed_work(&dev_priv->drrs.work);
3954e733 5480
a93fad0f 5481 mutex_lock(&dev_priv->drrs.mutex);
9da7d693
DV		 5482 if (!dev_priv->drrs.dp) {
5483 mutex_unlock(&dev_priv->drrs.mutex);
5484 return;
5485 }
5486
a93fad0f
VK		 5487 crtc = dp_to_dig_port(dev_priv->drrs.dp)->base.base.crtc;
5488 pipe = to_intel_crtc(crtc)->pipe;
c1d038c6
DV		 5489
5490 frontbuffer_bits &= INTEL_FRONTBUFFER_ALL_MASK(pipe);
a93fad0f
VK		 5491 dev_priv->drrs.busy_frontbuffer_bits &= ~frontbuffer_bits;
5492
0ddfd203 5493 /* flush means busy screen hence upclock */
c1d038c6 5494 if (frontbuffer_bits && dev_priv->drrs.refresh_rate_type == DRRS_LOW_RR)
0ddfd203
R		 5495 intel_dp_set_drrs_state(dev_priv->dev,
5496 dev_priv->drrs.dp->attached_connector->panel.
5497 fixed_mode->vrefresh);
5498
5499 /*
5500 * flush also means no more activity hence schedule downclock, if all
5501 * other fbs are quiescent too
5502 */
5503 if (!dev_priv->drrs.busy_frontbuffer_bits)
a93fad0f
VK		 5504 schedule_delayed_work(&dev_priv->drrs.work,
5505 msecs_to_jiffies(1000));
5506 mutex_unlock(&dev_priv->drrs.mutex);
5507}
5508
b33a2815
VK		 5509/**
5510 * DOC: Display Refresh Rate Switching (DRRS)
5511 *
5512 * Display Refresh Rate Switching (DRRS) is a power conservation feature
5513 * which enables swtching between low and high refresh rates,
5514 * dynamically, based on the usage scenario. This feature is applicable
5515 * for internal panels.
5516 *
5517 * Indication that the panel supports DRRS is given by the panel EDID, which
5518 * would list multiple refresh rates for one resolution.
5519 *
5520 * DRRS is of 2 types - static and seamless.
5521 * Static DRRS involves changing refresh rate (RR) by doing a full modeset
5522 * (may appear as a blink on screen) and is used in dock-undock scenario.
5523 * Seamless DRRS involves changing RR without any visual effect to the user
5524 * and can be used during normal system usage. This is done by programming
5525 * certain registers.
5526 *
5527 * Support for static/seamless DRRS may be indicated in the VBT based on
5528 * inputs from the panel spec.
5529 *
5530 * DRRS saves power by switching to low RR based on usage scenarios.
5531 *
5532 * eDP DRRS:-
5533 * The implementation is based on frontbuffer tracking implementation.
5534 * When there is a disturbance on the screen triggered by user activity or a
5535 * periodic system activity, DRRS is disabled (RR is changed to high RR).
5536 * When there is no movement on screen, after a timeout of 1 second, a switch
5537 * to low RR is made.
5538 * For integration with frontbuffer tracking code,
5539 * intel_edp_drrs_invalidate() and intel_edp_drrs_flush() are called.
5540 *
5541 * DRRS can be further extended to support other internal panels and also
5542 * the scenario of video playback wherein RR is set based on the rate
5543 * requested by userspace.
5544 */
5545
5546/**
5547 * intel_dp_drrs_init - Init basic DRRS work and mutex.
5548 * @intel_connector: eDP connector
5549 * @fixed_mode: preferred mode of panel
5550 *
5551 * This function is called only once at driver load to initialize basic
5552 * DRRS stuff.
5553 *
5554 * Returns:
5555 * Downclock mode if panel supports it, else return NULL.
5556 * DRRS support is determined by the presence of downclock mode (apart
5557 * from VBT setting).
5558 */
4f9db5b5 5559static struct drm_display_mode *
96178eeb
VK		 5560intel_dp_drrs_init(struct intel_connector *intel_connector,
5561 struct drm_display_mode *fixed_mode)
4f9db5b5
PB		 5562{
5563 struct drm_connector *connector = &intel_connector->base;
96178eeb 5564 struct drm_device *dev = connector->dev;
4f9db5b5
PB		 5565 struct drm_i915_private *dev_priv = dev->dev_private;
5566 struct drm_display_mode *downclock_mode = NULL;
5567
9da7d693
DV		 5568 INIT_DELAYED_WORK(&dev_priv->drrs.work, intel_edp_drrs_downclock_work);
5569 mutex_init(&dev_priv->drrs.mutex);
5570
4f9db5b5
PB		 5571 if (INTEL_INFO(dev)->gen <= 6) {
5572 DRM_DEBUG_KMS("DRRS supported for Gen7 and above\n");
5573 return NULL;
5574 }
5575
5576 if (dev_priv->vbt.drrs_type != SEAMLESS_DRRS_SUPPORT) {
4079b8d1 5577 DRM_DEBUG_KMS("VBT doesn't support DRRS\n");
4f9db5b5
PB		 5578 return NULL;
5579 }
5580
5581 downclock_mode = intel_find_panel_downclock
5582 (dev, fixed_mode, connector);
5583
5584 if (!downclock_mode) {
a1d26342 5585 DRM_DEBUG_KMS("Downclock mode is not found. DRRS not supported\n");
4f9db5b5
PB		 5586 return NULL;
5587 }
5588
96178eeb 5589 dev_priv->drrs.type = dev_priv->vbt.drrs_type;
4f9db5b5 5590
96178eeb 5591 dev_priv->drrs.refresh_rate_type = DRRS_HIGH_RR;
4079b8d1 5592 DRM_DEBUG_KMS("seamless DRRS supported for eDP panel.\n");
4f9db5b5
PB		 5593 return downclock_mode;
5594}
5595
ed92f0b2 5596static bool intel_edp_init_connector(struct intel_dp *intel_dp,
36b5f425 5597 struct intel_connector *intel_connector)
ed92f0b2
PZ		 5598{
5599 struct drm_connector *connector = &intel_connector->base;
5600 struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp);
63635217
PZ		 5601 struct intel_encoder *intel_encoder = &intel_dig_port->base;
5602 struct drm_device *dev = intel_encoder->base.dev;
ed92f0b2
PZ		 5603 struct drm_i915_private *dev_priv = dev->dev_private;
5604 struct drm_display_mode *fixed_mode = NULL;
4f9db5b5 5605 struct drm_display_mode *downclock_mode = NULL;
ed92f0b2
PZ		 5606 bool has_dpcd;
5607 struct drm_display_mode *scan;
5608 struct edid *edid;
6517d273 5609 enum pipe pipe = INVALID_PIPE;
ed92f0b2
PZ		 5610
5611 if (!is_edp(intel_dp))
5612 return true;
5613
49e6bc51
VS		 5614 pps_lock(intel_dp);
5615 intel_edp_panel_vdd_sanitize(intel_dp);
5616 pps_unlock(intel_dp);
63635217 5617
ed92f0b2 5618 /* Cache DPCD and EDID for edp. */
ed92f0b2 5619 has_dpcd = intel_dp_get_dpcd(intel_dp);
ed92f0b2
PZ		 5620
5621 if (has_dpcd) {
5622 if (intel_dp->dpcd[DP_DPCD_REV] >= 0x11)
5623 dev_priv->no_aux_handshake =
5624 intel_dp->dpcd[DP_MAX_DOWNSPREAD] &
5625 DP_NO_AUX_HANDSHAKE_LINK_TRAINING;
5626 } else {
5627 /* if this fails, presume the device is a ghost */
5628 DRM_INFO("failed to retrieve link info, disabling eDP\n");
ed92f0b2
PZ		 5629 return false;
5630 }
5631
5632 /* We now know it's not a ghost, init power sequence regs. */
773538e8 5633 pps_lock(intel_dp);
36b5f425 5634 intel_dp_init_panel_power_sequencer_registers(dev, intel_dp);
773538e8 5635 pps_unlock(intel_dp);
ed92f0b2 5636
060c8778 5637 mutex_lock(&dev->mode_config.mutex);
0b99836f 5638 edid = drm_get_edid(connector, &intel_dp->aux.ddc);
ed92f0b2
PZ		 5639 if (edid) {
5640 if (drm_add_edid_modes(connector, edid)) {
5641 drm_mode_connector_update_edid_property(connector,
5642 edid);
5643 drm_edid_to_eld(connector, edid);
5644 } else {
5645 kfree(edid);
5646 edid = ERR_PTR(-EINVAL);
5647 }
5648 } else {
5649 edid = ERR_PTR(-ENOENT);
5650 }
5651 intel_connector->edid = edid;
5652
5653 /* prefer fixed mode from EDID if available */
5654 list_for_each_entry(scan, &connector->probed_modes, head) {
5655 if ((scan->type & DRM_MODE_TYPE_PREFERRED)) {
5656 fixed_mode = drm_mode_duplicate(dev, scan);
4f9db5b5 5657 downclock_mode = intel_dp_drrs_init(
4f9db5b5 5658 intel_connector, fixed_mode);
ed92f0b2
PZ		 5659 break;
5660 }
5661 }
5662
5663 /* fallback to VBT if available for eDP */
5664 if (!fixed_mode && dev_priv->vbt.lfp_lvds_vbt_mode) {
5665 fixed_mode = drm_mode_duplicate(dev,
5666 dev_priv->vbt.lfp_lvds_vbt_mode);
5667 if (fixed_mode)
5668 fixed_mode->type |= DRM_MODE_TYPE_PREFERRED;
5669 }
060c8778 5670 mutex_unlock(&dev->mode_config.mutex);
ed92f0b2 5671
01527b31
CT		 5672 if (IS_VALLEYVIEW(dev)) {
5673 intel_dp->edp_notifier.notifier_call = edp_notify_handler;
5674 register_reboot_notifier(&intel_dp->edp_notifier);
6517d273
VS		 5675
5676 /*
5677 * Figure out the current pipe for the initial backlight setup.
5678 * If the current pipe isn't valid, try the PPS pipe, and if that
5679 * fails just assume pipe A.
5680 */
5681 if (IS_CHERRYVIEW(dev))
5682 pipe = DP_PORT_TO_PIPE_CHV(intel_dp->DP);
5683 else
5684 pipe = PORT_TO_PIPE(intel_dp->DP);
5685
5686 if (pipe != PIPE_A && pipe != PIPE_B)
5687 pipe = intel_dp->pps_pipe;
5688
5689 if (pipe != PIPE_A && pipe != PIPE_B)
5690 pipe = PIPE_A;
5691
5692 DRM_DEBUG_KMS("using pipe %c for initial backlight setup\n",
5693 pipe_name(pipe));
01527b31
CT		 5694 }
5695
4f9db5b5 5696 intel_panel_init(&intel_connector->panel, fixed_mode, downclock_mode);
5507faeb 5697 intel_connector->panel.backlight.power = intel_edp_backlight_power;
6517d273 5698 intel_panel_setup_backlight(connector, pipe);
ed92f0b2
PZ		 5699
5700 return true;
5701}
5702
16c25533 5703bool
f0fec3f2
PZ		 5704intel_dp_init_connector(struct intel_digital_port *intel_dig_port,
5705 struct intel_connector *intel_connector)
a4fc5ed6 5706{
f0fec3f2
PZ		 5707 struct drm_connector *connector = &intel_connector->base;
5708 struct intel_dp *intel_dp = &intel_dig_port->dp;
5709 struct intel_encoder *intel_encoder = &intel_dig_port->base;
5710 struct drm_device *dev = intel_encoder->base.dev;
a4fc5ed6 5711 struct drm_i915_private *dev_priv = dev->dev_private;
174edf1f 5712 enum port port = intel_dig_port->port;
0b99836f 5713 int type;
a4fc5ed6 5714
a4a5d2f8
VS		 5715 intel_dp->pps_pipe = INVALID_PIPE;
5716
ec5b01dd 5717 /* intel_dp vfuncs */
b6b5e383
DL		 5718 if (INTEL_INFO(dev)->gen >= 9)
5719 intel_dp->get_aux_clock_divider = skl_get_aux_clock_divider;
5720 else if (IS_VALLEYVIEW(dev))
ec5b01dd
DL		 5721 intel_dp->get_aux_clock_divider = vlv_get_aux_clock_divider;
5722 else if (IS_HASWELL(dev) || IS_BROADWELL(dev))
5723 intel_dp->get_aux_clock_divider = hsw_get_aux_clock_divider;
5724 else if (HAS_PCH_SPLIT(dev))
5725 intel_dp->get_aux_clock_divider = ilk_get_aux_clock_divider;
5726 else
5727 intel_dp->get_aux_clock_divider = i9xx_get_aux_clock_divider;
5728
b9ca5fad
DL		 5729 if (INTEL_INFO(dev)->gen >= 9)
5730 intel_dp->get_aux_send_ctl = skl_get_aux_send_ctl;
5731 else
5732 intel_dp->get_aux_send_ctl = i9xx_get_aux_send_ctl;
153b1100 5733
ad64217b
ACO		 5734 if (HAS_DDI(dev))
5735 intel_dp->prepare_link_retrain = intel_ddi_prepare_link_retrain;
5736
0767935e
DV		 5737 /* Preserve the current hw state. */
5738 intel_dp->DP = I915_READ(intel_dp->output_reg);
dd06f90e 5739 intel_dp->attached_connector = intel_connector;
3d3dc149 5740
3b32a35b 5741 if (intel_dp_is_edp(dev, port))
b329530c 5742 type = DRM_MODE_CONNECTOR_eDP;
3b32a35b
VS		 5743 else
5744 type = DRM_MODE_CONNECTOR_DisplayPort;
b329530c 5745
f7d24902
ID		 5746 /*
5747 * For eDP we always set the encoder type to INTEL_OUTPUT_EDP, but
5748 * for DP the encoder type can be set by the caller to
5749 * INTEL_OUTPUT_UNKNOWN for DDI, so don't rewrite it.
5750 */
5751 if (type == DRM_MODE_CONNECTOR_eDP)
5752 intel_encoder->type = INTEL_OUTPUT_EDP;
5753
c17ed5b5
VS		 5754 /* eDP only on port B and/or C on vlv/chv */
5755 if (WARN_ON(IS_VALLEYVIEW(dev) && is_edp(intel_dp) &&
5756 port != PORT_B && port != PORT_C))
5757 return false;
5758
e7281eab
ID		 5759 DRM_DEBUG_KMS("Adding %s connector on port %c\n",
5760 type == DRM_MODE_CONNECTOR_eDP ? "eDP" : "DP",
5761 port_name(port));
5762
b329530c 5763 drm_connector_init(dev, connector, &intel_dp_connector_funcs, type);
a4fc5ed6
KP		 5764 drm_connector_helper_add(connector, &intel_dp_connector_helper_funcs);
5765
a4fc5ed6
KP		 5766 connector->interlace_allowed = true;
5767 connector->doublescan_allowed = 0;
5768
f0fec3f2 5769 INIT_DELAYED_WORK(&intel_dp->panel_vdd_work,
4be73780 5770 edp_panel_vdd_work);
a4fc5ed6 5771
df0e9248 5772 intel_connector_attach_encoder(intel_connector, intel_encoder);
34ea3d38 5773 drm_connector_register(connector);
a4fc5ed6 5774
affa9354 5775 if (HAS_DDI(dev))
bcbc889b
PZ		 5776 intel_connector->get_hw_state = intel_ddi_connector_get_hw_state;
5777 else
5778 intel_connector->get_hw_state = intel_connector_get_hw_state;
80f65de3 5779 intel_connector->unregister = intel_dp_connector_unregister;
bcbc889b 5780
0b99836f 5781 /* Set up the hotplug pin. */
ab9d7c30
PZ		 5782 switch (port) {
5783 case PORT_A:
1d843f9d 5784 intel_encoder->hpd_pin = HPD_PORT_A;
ab9d7c30
PZ		 5785 break;
5786 case PORT_B:
1d843f9d 5787 intel_encoder->hpd_pin = HPD_PORT_B;
e87a005d 5788 if (IS_BXT_REVID(dev, 0, BXT_REVID_A1))
cf1d5883 5789 intel_encoder->hpd_pin = HPD_PORT_A;
ab9d7c30
PZ		 5790 break;
5791 case PORT_C:
1d843f9d 5792 intel_encoder->hpd_pin = HPD_PORT_C;
ab9d7c30
PZ		 5793 break;
5794 case PORT_D:
1d843f9d 5795 intel_encoder->hpd_pin = HPD_PORT_D;
ab9d7c30 5796 break;
26951caf
XZ		 5797 case PORT_E:
5798 intel_encoder->hpd_pin = HPD_PORT_E;
5799 break;
ab9d7c30 5800 default:
ad1c0b19 5801 BUG();
5eb08b69
ZW		 5802 }
5803
dada1a9f 5804 if (is_edp(intel_dp)) {
773538e8 5805 pps_lock(intel_dp);
1e74a324
VS		 5806 intel_dp_init_panel_power_timestamps(intel_dp);
5807 if (IS_VALLEYVIEW(dev))
a4a5d2f8 5808 vlv_initial_power_sequencer_setup(intel_dp);
1e74a324 5809 else
36b5f425 5810 intel_dp_init_panel_power_sequencer(dev, intel_dp);
773538e8 5811 pps_unlock(intel_dp);
dada1a9f 5812 }
0095e6dc 5813
9d1a1031 5814 intel_dp_aux_init(intel_dp, intel_connector);
c1f05264 5815
0e32b39c 5816 /* init MST on ports that can support it */
0c9b3715
JN		 5817 if (HAS_DP_MST(dev) &&
5818 (port == PORT_B || port == PORT_C || port == PORT_D))
5819 intel_dp_mst_encoder_init(intel_dig_port,
5820 intel_connector->base.base.id);
0e32b39c 5821
36b5f425 5822 if (!intel_edp_init_connector(intel_dp, intel_connector)) {
4f71d0cb 5823 drm_dp_aux_unregister(&intel_dp->aux);
15b1d171
PZ		 5824 if (is_edp(intel_dp)) {
5825 cancel_delayed_work_sync(&intel_dp->panel_vdd_work);
951468f3
VS		 5826 /*
5827 * vdd might still be enabled do to the delayed vdd off.
5828 * Make sure vdd is actually turned off here.
5829 */
773538e8 5830 pps_lock(intel_dp);
4be73780 5831 edp_panel_vdd_off_sync(intel_dp);
773538e8 5832 pps_unlock(intel_dp);
15b1d171 5833 }
34ea3d38 5834 drm_connector_unregister(connector);
b2f246a8 5835 drm_connector_cleanup(connector);
16c25533 5836 return false;
b2f246a8 5837 }
32f9d658 5838
f684960e
CW		 5839 intel_dp_add_properties(intel_dp, connector);
5840
a4fc5ed6
KP		 5841 /* For G4X desktop chip, PEG_BAND_GAP_DATA 3:0 must first be written
5842 * 0xd. Failure to do so will result in spurious interrupts being
5843 * generated on the port when a cable is not attached.
5844 */
5845 if (IS_G4X(dev) && !IS_GM45(dev)) {
5846 u32 temp = I915_READ(PEG_BAND_GAP_DATA);
5847 I915_WRITE(PEG_BAND_GAP_DATA, (temp & ~0xf) | 0xd);
5848 }
16c25533 5849
aa7471d2
JN		 5850 i915_debugfs_connector_add(connector);
5851
16c25533 5852 return true;
a4fc5ed6 5853}
f0fec3f2
PZ		 5854
5855void
5856intel_dp_init(struct drm_device *dev, int output_reg, enum port port)
5857{
13cf5504 5858 struct drm_i915_private *dev_priv = dev->dev_private;
f0fec3f2
PZ		 5859 struct intel_digital_port *intel_dig_port;
5860 struct intel_encoder *intel_encoder;
5861 struct drm_encoder *encoder;
5862 struct intel_connector *intel_connector;
5863
b14c5679 5864 intel_dig_port = kzalloc(sizeof(*intel_dig_port), GFP_KERNEL);
f0fec3f2
PZ		 5865 if (!intel_dig_port)
5866 return;
5867
08d9bc92 5868 intel_connector = intel_connector_alloc();
11aee0f6
SM		 5869 if (!intel_connector)
5870 goto err_connector_alloc;
f0fec3f2
PZ		 5871
5872 intel_encoder = &intel_dig_port->base;
5873 encoder = &intel_encoder->base;
5874
5875 drm_encoder_init(dev, &intel_encoder->base, &intel_dp_enc_funcs,
5876 DRM_MODE_ENCODER_TMDS);
5877
5bfe2ac0 5878 intel_encoder->compute_config = intel_dp_compute_config;
00c09d70 5879 intel_encoder->disable = intel_disable_dp;
00c09d70 5880 intel_encoder->get_hw_state = intel_dp_get_hw_state;
045ac3b5 5881 intel_encoder->get_config = intel_dp_get_config;
07f9cd0b 5882 intel_encoder->suspend = intel_dp_encoder_suspend;
e4a1d846 5883 if (IS_CHERRYVIEW(dev)) {
9197c88b 5884 intel_encoder->pre_pll_enable = chv_dp_pre_pll_enable;
e4a1d846
CML		 5885 intel_encoder->pre_enable = chv_pre_enable_dp;
5886 intel_encoder->enable = vlv_enable_dp;
580d3811 5887 intel_encoder->post_disable = chv_post_disable_dp;
d6db995f 5888 intel_encoder->post_pll_disable = chv_dp_post_pll_disable;
e4a1d846 5889 } else if (IS_VALLEYVIEW(dev)) {
ecff4f3b 5890 intel_encoder->pre_pll_enable = vlv_dp_pre_pll_enable;
ab1f90f9
JN		 5891 intel_encoder->pre_enable = vlv_pre_enable_dp;
5892 intel_encoder->enable = vlv_enable_dp;
49277c31 5893 intel_encoder->post_disable = vlv_post_disable_dp;
ab1f90f9 5894 } else {
ecff4f3b
JN		 5895 intel_encoder->pre_enable = g4x_pre_enable_dp;
5896 intel_encoder->enable = g4x_enable_dp;
08aff3fe
VS		 5897 if (INTEL_INFO(dev)->gen >= 5)
5898 intel_encoder->post_disable = ilk_post_disable_dp;
ab1f90f9 5899 }
f0fec3f2 5900
174edf1f 5901 intel_dig_port->port = port;
f0fec3f2
PZ		 5902 intel_dig_port->dp.output_reg = output_reg;
5903
00c09d70 5904 intel_encoder->type = INTEL_OUTPUT_DISPLAYPORT;
882ec384
VS		 5905 if (IS_CHERRYVIEW(dev)) {
5906 if (port == PORT_D)
5907 intel_encoder->crtc_mask = 1 << 2;
5908 else
5909 intel_encoder->crtc_mask = (1 << 0) | (1 << 1);
5910 } else {
5911 intel_encoder->crtc_mask = (1 << 0) | (1 << 1) | (1 << 2);
5912 }
bc079e8b 5913 intel_encoder->cloneable = 0;
f0fec3f2 5914
13cf5504 5915 intel_dig_port->hpd_pulse = intel_dp_hpd_pulse;
5fcece80 5916 dev_priv->hotplug.irq_port[port] = intel_dig_port;
13cf5504 5917
11aee0f6
SM		 5918 if (!intel_dp_init_connector(intel_dig_port, intel_connector))
5919 goto err_init_connector;
5920
5921 return;
5922
5923err_init_connector:
5924 drm_encoder_cleanup(encoder);
5925 kfree(intel_connector);
5926err_connector_alloc:
5927 kfree(intel_dig_port);
5928
5929 return;
f0fec3f2 5930}
0e32b39c
DA		 5931
5932void intel_dp_mst_suspend(struct drm_device *dev)
5933{
5934 struct drm_i915_private *dev_priv = dev->dev_private;
5935 int i;
5936
5937 /* disable MST */
5938 for (i = 0; i < I915_MAX_PORTS; i++) {
5fcece80 5939 struct intel_digital_port *intel_dig_port = dev_priv->hotplug.irq_port[i];
0e32b39c
DA		 5940 if (!intel_dig_port)
5941 continue;
5942
5943 if (intel_dig_port->base.type == INTEL_OUTPUT_DISPLAYPORT) {
5944 if (!intel_dig_port->dp.can_mst)
5945 continue;
5946 if (intel_dig_port->dp.is_mst)
5947 drm_dp_mst_topology_mgr_suspend(&intel_dig_port->dp.mst_mgr);
5948 }
5949 }
5950}
5951
5952void intel_dp_mst_resume(struct drm_device *dev)
5953{
5954 struct drm_i915_private *dev_priv = dev->dev_private;
5955 int i;
5956
5957 for (i = 0; i < I915_MAX_PORTS; i++) {
5fcece80 5958 struct intel_digital_port *intel_dig_port = dev_priv->hotplug.irq_port[i];
0e32b39c
DA		 5959 if (!intel_dig_port)
5960 continue;
5961 if (intel_dig_port->base.type == INTEL_OUTPUT_DISPLAYPORT) {
5962 int ret;
5963
5964 if (!intel_dig_port->dp.can_mst)
5965 continue;
5966
5967 ret = drm_dp_mst_topology_mgr_resume(&intel_dig_port->dp.mst_mgr);
5968 if (ret != 0) {
5969 intel_dp_check_mst_status(&intel_dig_port->dp);
5970 }
5971 }
5972 }
5973}
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