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1// SPDX-License-Identifier: MIT
2/*
3 * Copyright © 2020 Intel Corporation
4 */
5
6#include "g4x_dp.h"
7#include "i915_drv.h"
8#include "i915_reg.h"
9#include "intel_de.h"
10#include "intel_display_power_well.h"
11#include "intel_display_types.h"
12#include "intel_dp.h"
13#include "intel_dpio_phy.h"
14#include "intel_dpll.h"
15#include "intel_lvds.h"
16#include "intel_lvds_regs.h"
17#include "intel_pps.h"
18#include "intel_pps_regs.h"
19#include "intel_quirks.h"
20
21static void vlv_steal_power_sequencer(struct drm_i915_private *dev_priv,
22 enum pipe pipe);
23
24static void pps_init_delays(struct intel_dp *intel_dp);
25static void pps_init_registers(struct intel_dp *intel_dp, bool force_disable_vdd);
26
27static const char *pps_name(struct drm_i915_private *i915,
28 struct intel_pps *pps)
29{
30 if (IS_VALLEYVIEW(i915) || IS_CHERRYVIEW(i915)) {
31 switch (pps->pps_pipe) {
32 case INVALID_PIPE:
33 /*
34 * FIXME would be nice if we can guarantee
35 * to always have a valid PPS when calling this.
36 */
37 return "PPS <none>";
38 case PIPE_A:
39 return "PPS A";
40 case PIPE_B:
41 return "PPS B";
42 default:
43 MISSING_CASE(pps->pps_pipe);
44 break;
45 }
46 } else {
47 switch (pps->pps_idx) {
48 case 0:
49 return "PPS 0";
50 case 1:
51 return "PPS 1";
52 default:
53 MISSING_CASE(pps->pps_idx);
54 break;
55 }
56 }
57
58 return "PPS <invalid>";
59}
60
61intel_wakeref_t intel_pps_lock(struct intel_dp *intel_dp)
62{
63 struct drm_i915_private *dev_priv = dp_to_i915(intel_dp);
64 intel_wakeref_t wakeref;
65
66 /*
67 * See intel_pps_reset_all() why we need a power domain reference here.
68 */
69 wakeref = intel_display_power_get(dev_priv, POWER_DOMAIN_DISPLAY_CORE);
70 mutex_lock(&dev_priv->display.pps.mutex);
71
72 return wakeref;
73}
74
75intel_wakeref_t intel_pps_unlock(struct intel_dp *intel_dp,
76 intel_wakeref_t wakeref)
77{
78 struct drm_i915_private *dev_priv = dp_to_i915(intel_dp);
79
80 mutex_unlock(&dev_priv->display.pps.mutex);
81 intel_display_power_put(dev_priv, POWER_DOMAIN_DISPLAY_CORE, wakeref);
82
83 return 0;
84}
85
86static void
87vlv_power_sequencer_kick(struct intel_dp *intel_dp)
88{
89 struct drm_i915_private *dev_priv = dp_to_i915(intel_dp);
90 struct intel_digital_port *dig_port = dp_to_dig_port(intel_dp);
91 enum pipe pipe = intel_dp->pps.pps_pipe;
92 bool pll_enabled, release_cl_override = false;
93 enum dpio_phy phy = vlv_pipe_to_phy(pipe);
94 enum dpio_channel ch = vlv_pipe_to_channel(pipe);
95 u32 DP;
96
97 if (drm_WARN(&dev_priv->drm,
98 intel_de_read(dev_priv, intel_dp->output_reg) & DP_PORT_EN,
99 "skipping %s kick due to [ENCODER:%d:%s] being active\n",
100 pps_name(dev_priv, &intel_dp->pps),
101 dig_port->base.base.base.id, dig_port->base.base.name))
102 return;
103
104 drm_dbg_kms(&dev_priv->drm,
105 "kicking %s for [ENCODER:%d:%s]\n",
106 pps_name(dev_priv, &intel_dp->pps),
107 dig_port->base.base.base.id, dig_port->base.base.name);
108
109 /* Preserve the BIOS-computed detected bit. This is
110 * supposed to be read-only.
111 */
112 DP = intel_de_read(dev_priv, intel_dp->output_reg) & DP_DETECTED;
113 DP |= DP_VOLTAGE_0_4 | DP_PRE_EMPHASIS_0;
114 DP |= DP_PORT_WIDTH(1);
115 DP |= DP_LINK_TRAIN_PAT_1;
116
117 if (IS_CHERRYVIEW(dev_priv))
118 DP |= DP_PIPE_SEL_CHV(pipe);
119 else
120 DP |= DP_PIPE_SEL(pipe);
121
122 pll_enabled = intel_de_read(dev_priv, DPLL(pipe)) & DPLL_VCO_ENABLE;
123
124 /*
125 * The DPLL for the pipe must be enabled for this to work.
126 * So enable temporarily it if it's not already enabled.
127 */
128 if (!pll_enabled) {
129 release_cl_override = IS_CHERRYVIEW(dev_priv) &&
130 !chv_phy_powergate_ch(dev_priv, phy, ch, true);
131
132 if (vlv_force_pll_on(dev_priv, pipe, vlv_get_dpll(dev_priv))) {
133 drm_err(&dev_priv->drm,
134 "Failed to force on PLL for pipe %c!\n",
135 pipe_name(pipe));
136 return;
137 }
138 }
139
140 /*
141 * Similar magic as in intel_dp_enable_port().
142 * We _must_ do this port enable + disable trick
143 * to make this power sequencer lock onto the port.
144 * Otherwise even VDD force bit won't work.
145 */
146 intel_de_write(dev_priv, intel_dp->output_reg, DP);
147 intel_de_posting_read(dev_priv, intel_dp->output_reg);
148
149 intel_de_write(dev_priv, intel_dp->output_reg, DP | DP_PORT_EN);
150 intel_de_posting_read(dev_priv, intel_dp->output_reg);
151
152 intel_de_write(dev_priv, intel_dp->output_reg, DP & ~DP_PORT_EN);
153 intel_de_posting_read(dev_priv, intel_dp->output_reg);
154
155 if (!pll_enabled) {
156 vlv_force_pll_off(dev_priv, pipe);
157
158 if (release_cl_override)
159 chv_phy_powergate_ch(dev_priv, phy, ch, false);
160 }
161}
162
163static enum pipe vlv_find_free_pps(struct drm_i915_private *dev_priv)
164{
165 struct intel_encoder *encoder;
166 unsigned int pipes = (1 << PIPE_A) | (1 << PIPE_B);
167
168 /*
169 * We don't have power sequencer currently.
170 * Pick one that's not used by other ports.
171 */
172 for_each_intel_dp(&dev_priv->drm, encoder) {
173 struct intel_dp *intel_dp = enc_to_intel_dp(encoder);
174
175 if (encoder->type == INTEL_OUTPUT_EDP) {
176 drm_WARN_ON(&dev_priv->drm,
177 intel_dp->pps.active_pipe != INVALID_PIPE &&
178 intel_dp->pps.active_pipe !=
179 intel_dp->pps.pps_pipe);
180
181 if (intel_dp->pps.pps_pipe != INVALID_PIPE)
182 pipes &= ~(1 << intel_dp->pps.pps_pipe);
183 } else {
184 drm_WARN_ON(&dev_priv->drm,
185 intel_dp->pps.pps_pipe != INVALID_PIPE);
186
187 if (intel_dp->pps.active_pipe != INVALID_PIPE)
188 pipes &= ~(1 << intel_dp->pps.active_pipe);
189 }
190 }
191
192 if (pipes == 0)
193 return INVALID_PIPE;
194
195 return ffs(pipes) - 1;
196}
197
198static enum pipe
199vlv_power_sequencer_pipe(struct intel_dp *intel_dp)
200{
201 struct drm_i915_private *dev_priv = dp_to_i915(intel_dp);
202 struct intel_digital_port *dig_port = dp_to_dig_port(intel_dp);
203 enum pipe pipe;
204
205 lockdep_assert_held(&dev_priv->display.pps.mutex);
206
207 /* We should never land here with regular DP ports */
208 drm_WARN_ON(&dev_priv->drm, !intel_dp_is_edp(intel_dp));
209
210 drm_WARN_ON(&dev_priv->drm, intel_dp->pps.active_pipe != INVALID_PIPE &&
211 intel_dp->pps.active_pipe != intel_dp->pps.pps_pipe);
212
213 if (intel_dp->pps.pps_pipe != INVALID_PIPE)
214 return intel_dp->pps.pps_pipe;
215
216 pipe = vlv_find_free_pps(dev_priv);
217
218 /*
219 * Didn't find one. This should not happen since there
220 * are two power sequencers and up to two eDP ports.
221 */
222 if (drm_WARN_ON(&dev_priv->drm, pipe == INVALID_PIPE))
223 pipe = PIPE_A;
224
225 vlv_steal_power_sequencer(dev_priv, pipe);
226 intel_dp->pps.pps_pipe = pipe;
227
228 drm_dbg_kms(&dev_priv->drm,
229 "picked %s for [ENCODER:%d:%s]\n",
230 pps_name(dev_priv, &intel_dp->pps),
231 dig_port->base.base.base.id, dig_port->base.base.name);
232
233 /* init power sequencer on this pipe and port */
234 pps_init_delays(intel_dp);
235 pps_init_registers(intel_dp, true);
236
237 /*
238 * Even vdd force doesn't work until we've made
239 * the power sequencer lock in on the port.
240 */
241 vlv_power_sequencer_kick(intel_dp);
242
243 return intel_dp->pps.pps_pipe;
244}
245
246static int
247bxt_power_sequencer_idx(struct intel_dp *intel_dp)
248{
249 struct drm_i915_private *dev_priv = dp_to_i915(intel_dp);
250 int pps_idx = intel_dp->pps.pps_idx;
251
252 lockdep_assert_held(&dev_priv->display.pps.mutex);
253
254 /* We should never land here with regular DP ports */
255 drm_WARN_ON(&dev_priv->drm, !intel_dp_is_edp(intel_dp));
256
257 if (!intel_dp->pps.pps_reset)
258 return pps_idx;
259
260 intel_dp->pps.pps_reset = false;
261
262 /*
263 * Only the HW needs to be reprogrammed, the SW state is fixed and
264 * has been setup during connector init.
265 */
266 pps_init_registers(intel_dp, false);
267
268 return pps_idx;
269}
270
271typedef bool (*pps_check)(struct drm_i915_private *dev_priv, int pps_idx);
272
273static bool pps_has_pp_on(struct drm_i915_private *dev_priv, int pps_idx)
274{
275 return intel_de_read(dev_priv, PP_STATUS(pps_idx)) & PP_ON;
276}
277
278static bool pps_has_vdd_on(struct drm_i915_private *dev_priv, int pps_idx)
279{
280 return intel_de_read(dev_priv, PP_CONTROL(pps_idx)) & EDP_FORCE_VDD;
281}
282
283static bool pps_any(struct drm_i915_private *dev_priv, int pps_idx)
284{
285 return true;
286}
287
288static enum pipe
289vlv_initial_pps_pipe(struct drm_i915_private *dev_priv,
290 enum port port, pps_check check)
291{
292 enum pipe pipe;
293
294 for (pipe = PIPE_A; pipe <= PIPE_B; pipe++) {
295 u32 port_sel = intel_de_read(dev_priv, PP_ON_DELAYS(pipe)) &
296 PANEL_PORT_SELECT_MASK;
297
298 if (port_sel != PANEL_PORT_SELECT_VLV(port))
299 continue;
300
301 if (!check(dev_priv, pipe))
302 continue;
303
304 return pipe;
305 }
306
307 return INVALID_PIPE;
308}
309
310static void
311vlv_initial_power_sequencer_setup(struct intel_dp *intel_dp)
312{
313 struct drm_i915_private *dev_priv = dp_to_i915(intel_dp);
314 struct intel_digital_port *dig_port = dp_to_dig_port(intel_dp);
315 enum port port = dig_port->base.port;
316
317 lockdep_assert_held(&dev_priv->display.pps.mutex);
318
319 /* try to find a pipe with this port selected */
320 /* first pick one where the panel is on */
321 intel_dp->pps.pps_pipe = vlv_initial_pps_pipe(dev_priv, port,
322 pps_has_pp_on);
323 /* didn't find one? pick one where vdd is on */
324 if (intel_dp->pps.pps_pipe == INVALID_PIPE)
325 intel_dp->pps.pps_pipe = vlv_initial_pps_pipe(dev_priv, port,
326 pps_has_vdd_on);
327 /* didn't find one? pick one with just the correct port */
328 if (intel_dp->pps.pps_pipe == INVALID_PIPE)
329 intel_dp->pps.pps_pipe = vlv_initial_pps_pipe(dev_priv, port,
330 pps_any);
331
332 /* didn't find one? just let vlv_power_sequencer_pipe() pick one when needed */
333 if (intel_dp->pps.pps_pipe == INVALID_PIPE) {
334 drm_dbg_kms(&dev_priv->drm,
335 "[ENCODER:%d:%s] no initial power sequencer\n",
336 dig_port->base.base.base.id, dig_port->base.base.name);
337 return;
338 }
339
340 drm_dbg_kms(&dev_priv->drm,
341 "[ENCODER:%d:%s] initial power sequencer: %s\n",
342 dig_port->base.base.base.id, dig_port->base.base.name,
343 pps_name(dev_priv, &intel_dp->pps));
344}
345
346static int intel_num_pps(struct drm_i915_private *i915)
347{
348 if (IS_VALLEYVIEW(i915) || IS_CHERRYVIEW(i915))
349 return 2;
350
351 if (IS_GEMINILAKE(i915) || IS_BROXTON(i915))
352 return 2;
353
354 if (INTEL_PCH_TYPE(i915) >= PCH_DG1)
355 return 1;
356
357 if (INTEL_PCH_TYPE(i915) >= PCH_ICP)
358 return 2;
359
360 return 1;
361}
362
363static bool intel_pps_is_valid(struct intel_dp *intel_dp)
364{
365 struct drm_i915_private *i915 = dp_to_i915(intel_dp);
366
367 if (intel_dp->pps.pps_idx == 1 &&
368 INTEL_PCH_TYPE(i915) >= PCH_ICP &&
369 INTEL_PCH_TYPE(i915) <= PCH_ADP)
370 return intel_de_read(i915, SOUTH_CHICKEN1) & ICP_SECOND_PPS_IO_SELECT;
371
372 return true;
373}
374
375static int
376bxt_initial_pps_idx(struct drm_i915_private *i915, pps_check check)
377{
378 int pps_idx, pps_num = intel_num_pps(i915);
379
380 for (pps_idx = 0; pps_idx < pps_num; pps_idx++) {
381 if (check(i915, pps_idx))
382 return pps_idx;
383 }
384
385 return -1;
386}
387
388static bool
389pps_initial_setup(struct intel_dp *intel_dp)
390{
391 struct intel_encoder *encoder = &dp_to_dig_port(intel_dp)->base;
392 struct intel_connector *connector = intel_dp->attached_connector;
393 struct drm_i915_private *i915 = to_i915(encoder->base.dev);
394
395 lockdep_assert_held(&i915->display.pps.mutex);
396
397 if (IS_VALLEYVIEW(i915) || IS_CHERRYVIEW(i915)) {
398 vlv_initial_power_sequencer_setup(intel_dp);
399 return true;
400 }
401
402 /* first ask the VBT */
403 if (intel_num_pps(i915) > 1)
404 intel_dp->pps.pps_idx = connector->panel.vbt.backlight.controller;
405 else
406 intel_dp->pps.pps_idx = 0;
407
408 if (drm_WARN_ON(&i915->drm, intel_dp->pps.pps_idx >= intel_num_pps(i915)))
409 intel_dp->pps.pps_idx = -1;
410
411 /* VBT wasn't parsed yet? pick one where the panel is on */
412 if (intel_dp->pps.pps_idx < 0)
413 intel_dp->pps.pps_idx = bxt_initial_pps_idx(i915, pps_has_pp_on);
414 /* didn't find one? pick one where vdd is on */
415 if (intel_dp->pps.pps_idx < 0)
416 intel_dp->pps.pps_idx = bxt_initial_pps_idx(i915, pps_has_vdd_on);
417 /* didn't find one? pick any */
418 if (intel_dp->pps.pps_idx < 0) {
419 intel_dp->pps.pps_idx = bxt_initial_pps_idx(i915, pps_any);
420
421 drm_dbg_kms(&i915->drm,
422 "[ENCODER:%d:%s] no initial power sequencer, assuming %s\n",
423 encoder->base.base.id, encoder->base.name,
424 pps_name(i915, &intel_dp->pps));
425 } else {
426 drm_dbg_kms(&i915->drm,
427 "[ENCODER:%d:%s] initial power sequencer: %s\n",
428 encoder->base.base.id, encoder->base.name,
429 pps_name(i915, &intel_dp->pps));
430 }
431
432 return intel_pps_is_valid(intel_dp);
433}
434
435void intel_pps_reset_all(struct drm_i915_private *dev_priv)
436{
437 struct intel_encoder *encoder;
438
439 if (drm_WARN_ON(&dev_priv->drm, !IS_LP(dev_priv)))
440 return;
441
442 if (!HAS_DISPLAY(dev_priv))
443 return;
444
445 /*
446 * We can't grab pps_mutex here due to deadlock with power_domain
447 * mutex when power_domain functions are called while holding pps_mutex.
448 * That also means that in order to use pps_pipe the code needs to
449 * hold both a power domain reference and pps_mutex, and the power domain
450 * reference get/put must be done while _not_ holding pps_mutex.
451 * pps_{lock,unlock}() do these steps in the correct order, so one
452 * should use them always.
453 */
454
455 for_each_intel_dp(&dev_priv->drm, encoder) {
456 struct intel_dp *intel_dp = enc_to_intel_dp(encoder);
457
458 drm_WARN_ON(&dev_priv->drm,
459 intel_dp->pps.active_pipe != INVALID_PIPE);
460
461 if (encoder->type != INTEL_OUTPUT_EDP)
462 continue;
463
464 if (DISPLAY_VER(dev_priv) >= 9)
465 intel_dp->pps.pps_reset = true;
466 else
467 intel_dp->pps.pps_pipe = INVALID_PIPE;
468 }
469}
470
471struct pps_registers {
472 i915_reg_t pp_ctrl;
473 i915_reg_t pp_stat;
474 i915_reg_t pp_on;
475 i915_reg_t pp_off;
476 i915_reg_t pp_div;
477};
478
479static void intel_pps_get_registers(struct intel_dp *intel_dp,
480 struct pps_registers *regs)
481{
482 struct drm_i915_private *dev_priv = dp_to_i915(intel_dp);
483 int pps_idx;
484
485 memset(regs, 0, sizeof(*regs));
486
487 if (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv))
488 pps_idx = vlv_power_sequencer_pipe(intel_dp);
489 else if (IS_GEMINILAKE(dev_priv) || IS_BROXTON(dev_priv))
490 pps_idx = bxt_power_sequencer_idx(intel_dp);
491 else
492 pps_idx = intel_dp->pps.pps_idx;
493
494 regs->pp_ctrl = PP_CONTROL(pps_idx);
495 regs->pp_stat = PP_STATUS(pps_idx);
496 regs->pp_on = PP_ON_DELAYS(pps_idx);
497 regs->pp_off = PP_OFF_DELAYS(pps_idx);
498
499 /* Cycle delay moved from PP_DIVISOR to PP_CONTROL */
500 if (IS_GEMINILAKE(dev_priv) || IS_BROXTON(dev_priv) ||
501 INTEL_PCH_TYPE(dev_priv) >= PCH_CNP)
502 regs->pp_div = INVALID_MMIO_REG;
503 else
504 regs->pp_div = PP_DIVISOR(pps_idx);
505}
506
507static i915_reg_t
508_pp_ctrl_reg(struct intel_dp *intel_dp)
509{
510 struct pps_registers regs;
511
512 intel_pps_get_registers(intel_dp, ®s);
513
514 return regs.pp_ctrl;
515}
516
517static i915_reg_t
518_pp_stat_reg(struct intel_dp *intel_dp)
519{
520 struct pps_registers regs;
521
522 intel_pps_get_registers(intel_dp, ®s);
523
524 return regs.pp_stat;
525}
526
527static bool edp_have_panel_power(struct intel_dp *intel_dp)
528{
529 struct drm_i915_private *dev_priv = dp_to_i915(intel_dp);
530
531 lockdep_assert_held(&dev_priv->display.pps.mutex);
532
533 if ((IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv)) &&
534 intel_dp->pps.pps_pipe == INVALID_PIPE)
535 return false;
536
537 return (intel_de_read(dev_priv, _pp_stat_reg(intel_dp)) & PP_ON) != 0;
538}
539
540static bool edp_have_panel_vdd(struct intel_dp *intel_dp)
541{
542 struct drm_i915_private *dev_priv = dp_to_i915(intel_dp);
543
544 lockdep_assert_held(&dev_priv->display.pps.mutex);
545
546 if ((IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv)) &&
547 intel_dp->pps.pps_pipe == INVALID_PIPE)
548 return false;
549
550 return intel_de_read(dev_priv, _pp_ctrl_reg(intel_dp)) & EDP_FORCE_VDD;
551}
552
553void intel_pps_check_power_unlocked(struct intel_dp *intel_dp)
554{
555 struct drm_i915_private *dev_priv = dp_to_i915(intel_dp);
556 struct intel_digital_port *dig_port = dp_to_dig_port(intel_dp);
557
558 if (!intel_dp_is_edp(intel_dp))
559 return;
560
561 if (!edp_have_panel_power(intel_dp) && !edp_have_panel_vdd(intel_dp)) {
562 drm_WARN(&dev_priv->drm, 1,
563 "[ENCODER:%d:%s] %s powered off while attempting AUX CH communication.\n",
564 dig_port->base.base.base.id, dig_port->base.base.name,
565 pps_name(dev_priv, &intel_dp->pps));
566 drm_dbg_kms(&dev_priv->drm,
567 "[ENCODER:%d:%s] %s PP_STATUS: 0x%08x PP_CONTROL: 0x%08x\n",
568 dig_port->base.base.base.id, dig_port->base.base.name,
569 pps_name(dev_priv, &intel_dp->pps),
570 intel_de_read(dev_priv, _pp_stat_reg(intel_dp)),
571 intel_de_read(dev_priv, _pp_ctrl_reg(intel_dp)));
572 }
573}
574
575#define IDLE_ON_MASK (PP_ON | PP_SEQUENCE_MASK | 0 | PP_SEQUENCE_STATE_MASK)
576#define IDLE_ON_VALUE (PP_ON | PP_SEQUENCE_NONE | 0 | PP_SEQUENCE_STATE_ON_IDLE)
577
578#define IDLE_OFF_MASK (PP_ON | PP_SEQUENCE_MASK | 0 | 0)
579#define IDLE_OFF_VALUE (0 | PP_SEQUENCE_NONE | 0 | 0)
580
581#define IDLE_CYCLE_MASK (PP_ON | PP_SEQUENCE_MASK | PP_CYCLE_DELAY_ACTIVE | PP_SEQUENCE_STATE_MASK)
582#define IDLE_CYCLE_VALUE (0 | PP_SEQUENCE_NONE | 0 | PP_SEQUENCE_STATE_OFF_IDLE)
583
584static void intel_pps_verify_state(struct intel_dp *intel_dp);
585
586static void wait_panel_status(struct intel_dp *intel_dp,
587 u32 mask, u32 value)
588{
589 struct drm_i915_private *dev_priv = dp_to_i915(intel_dp);
590 struct intel_digital_port *dig_port = dp_to_dig_port(intel_dp);
591 i915_reg_t pp_stat_reg, pp_ctrl_reg;
592
593 lockdep_assert_held(&dev_priv->display.pps.mutex);
594
595 intel_pps_verify_state(intel_dp);
596
597 pp_stat_reg = _pp_stat_reg(intel_dp);
598 pp_ctrl_reg = _pp_ctrl_reg(intel_dp);
599
600 drm_dbg_kms(&dev_priv->drm,
601 "[ENCODER:%d:%s] %s mask: 0x%08x value: 0x%08x PP_STATUS: 0x%08x PP_CONTROL: 0x%08x\n",
602 dig_port->base.base.base.id, dig_port->base.base.name,
603 pps_name(dev_priv, &intel_dp->pps),
604 mask, value,
605 intel_de_read(dev_priv, pp_stat_reg),
606 intel_de_read(dev_priv, pp_ctrl_reg));
607
608 if (intel_de_wait_for_register(dev_priv, pp_stat_reg,
609 mask, value, 5000))
610 drm_err(&dev_priv->drm,
611 "[ENCODER:%d:%s] %s panel status timeout: PP_STATUS: 0x%08x PP_CONTROL: 0x%08x\n",
612 dig_port->base.base.base.id, dig_port->base.base.name,
613 pps_name(dev_priv, &intel_dp->pps),
614 intel_de_read(dev_priv, pp_stat_reg),
615 intel_de_read(dev_priv, pp_ctrl_reg));
616
617 drm_dbg_kms(&dev_priv->drm, "Wait complete\n");
618}
619
620static void wait_panel_on(struct intel_dp *intel_dp)
621{
622 struct drm_i915_private *i915 = dp_to_i915(intel_dp);
623 struct intel_digital_port *dig_port = dp_to_dig_port(intel_dp);
624
625 drm_dbg_kms(&i915->drm, "[ENCODER:%d:%s] %s wait for panel power on\n",
626 dig_port->base.base.base.id, dig_port->base.base.name,
627 pps_name(i915, &intel_dp->pps));
628 wait_panel_status(intel_dp, IDLE_ON_MASK, IDLE_ON_VALUE);
629}
630
631static void wait_panel_off(struct intel_dp *intel_dp)
632{
633 struct drm_i915_private *i915 = dp_to_i915(intel_dp);
634 struct intel_digital_port *dig_port = dp_to_dig_port(intel_dp);
635
636 drm_dbg_kms(&i915->drm, "[ENCODER:%d:%s] %s wait for panel power off time\n",
637 dig_port->base.base.base.id, dig_port->base.base.name,
638 pps_name(i915, &intel_dp->pps));
639 wait_panel_status(intel_dp, IDLE_OFF_MASK, IDLE_OFF_VALUE);
640}
641
642static void wait_panel_power_cycle(struct intel_dp *intel_dp)
643{
644 struct drm_i915_private *i915 = dp_to_i915(intel_dp);
645 struct intel_digital_port *dig_port = dp_to_dig_port(intel_dp);
646 ktime_t panel_power_on_time;
647 s64 panel_power_off_duration;
648
649 drm_dbg_kms(&i915->drm, "[ENCODER:%d:%s] %s wait for panel power cycle\n",
650 dig_port->base.base.base.id, dig_port->base.base.name,
651 pps_name(i915, &intel_dp->pps));
652
653 /* take the difference of current time and panel power off time
654 * and then make panel wait for t11_t12 if needed. */
655 panel_power_on_time = ktime_get_boottime();
656 panel_power_off_duration = ktime_ms_delta(panel_power_on_time, intel_dp->pps.panel_power_off_time);
657
658 /* When we disable the VDD override bit last we have to do the manual
659 * wait. */
660 if (panel_power_off_duration < (s64)intel_dp->pps.panel_power_cycle_delay)
661 wait_remaining_ms_from_jiffies(jiffies,
662 intel_dp->pps.panel_power_cycle_delay - panel_power_off_duration);
663
664 wait_panel_status(intel_dp, IDLE_CYCLE_MASK, IDLE_CYCLE_VALUE);
665}
666
667void intel_pps_wait_power_cycle(struct intel_dp *intel_dp)
668{
669 intel_wakeref_t wakeref;
670
671 if (!intel_dp_is_edp(intel_dp))
672 return;
673
674 with_intel_pps_lock(intel_dp, wakeref)
675 wait_panel_power_cycle(intel_dp);
676}
677
678static void wait_backlight_on(struct intel_dp *intel_dp)
679{
680 wait_remaining_ms_from_jiffies(intel_dp->pps.last_power_on,
681 intel_dp->pps.backlight_on_delay);
682}
683
684static void edp_wait_backlight_off(struct intel_dp *intel_dp)
685{
686 wait_remaining_ms_from_jiffies(intel_dp->pps.last_backlight_off,
687 intel_dp->pps.backlight_off_delay);
688}
689
690/* Read the current pp_control value, unlocking the register if it
691 * is locked
692 */
693
694static u32 ilk_get_pp_control(struct intel_dp *intel_dp)
695{
696 struct drm_i915_private *dev_priv = dp_to_i915(intel_dp);
697 u32 control;
698
699 lockdep_assert_held(&dev_priv->display.pps.mutex);
700
701 control = intel_de_read(dev_priv, _pp_ctrl_reg(intel_dp));
702 if (drm_WARN_ON(&dev_priv->drm, !HAS_DDI(dev_priv) &&
703 (control & PANEL_UNLOCK_MASK) != PANEL_UNLOCK_REGS)) {
704 control &= ~PANEL_UNLOCK_MASK;
705 control |= PANEL_UNLOCK_REGS;
706 }
707 return control;
708}
709
710/*
711 * Must be paired with intel_pps_vdd_off_unlocked().
712 * Must hold pps_mutex around the whole on/off sequence.
713 * Can be nested with intel_pps_vdd_{on,off}() calls.
714 */
715bool intel_pps_vdd_on_unlocked(struct intel_dp *intel_dp)
716{
717 struct drm_i915_private *dev_priv = dp_to_i915(intel_dp);
718 struct intel_digital_port *dig_port = dp_to_dig_port(intel_dp);
719 u32 pp;
720 i915_reg_t pp_stat_reg, pp_ctrl_reg;
721 bool need_to_disable = !intel_dp->pps.want_panel_vdd;
722
723 lockdep_assert_held(&dev_priv->display.pps.mutex);
724
725 if (!intel_dp_is_edp(intel_dp))
726 return false;
727
728 cancel_delayed_work(&intel_dp->pps.panel_vdd_work);
729 intel_dp->pps.want_panel_vdd = true;
730
731 if (edp_have_panel_vdd(intel_dp))
732 return need_to_disable;
733
734 drm_WARN_ON(&dev_priv->drm, intel_dp->pps.vdd_wakeref);
735 intel_dp->pps.vdd_wakeref = intel_display_power_get(dev_priv,
736 intel_aux_power_domain(dig_port));
737
738 pp_stat_reg = _pp_stat_reg(intel_dp);
739 pp_ctrl_reg = _pp_ctrl_reg(intel_dp);
740
741 drm_dbg_kms(&dev_priv->drm, "[ENCODER:%d:%s] %s turning VDD on\n",
742 dig_port->base.base.base.id, dig_port->base.base.name,
743 pps_name(dev_priv, &intel_dp->pps));
744
745 if (!edp_have_panel_power(intel_dp))
746 wait_panel_power_cycle(intel_dp);
747
748 pp = ilk_get_pp_control(intel_dp);
749 pp |= EDP_FORCE_VDD;
750
751 intel_de_write(dev_priv, pp_ctrl_reg, pp);
752 intel_de_posting_read(dev_priv, pp_ctrl_reg);
753 drm_dbg_kms(&dev_priv->drm, "[ENCODER:%d:%s] %s PP_STATUS: 0x%08x PP_CONTROL: 0x%08x\n",
754 dig_port->base.base.base.id, dig_port->base.base.name,
755 pps_name(dev_priv, &intel_dp->pps),
756 intel_de_read(dev_priv, pp_stat_reg),
757 intel_de_read(dev_priv, pp_ctrl_reg));
758 /*
759 * If the panel wasn't on, delay before accessing aux channel
760 */
761 if (!edp_have_panel_power(intel_dp)) {
762 drm_dbg_kms(&dev_priv->drm,
763 "[ENCODER:%d:%s] %s panel power wasn't enabled\n",
764 dig_port->base.base.base.id, dig_port->base.base.name,
765 pps_name(dev_priv, &intel_dp->pps));
766 msleep(intel_dp->pps.panel_power_up_delay);
767 }
768
769 return need_to_disable;
770}
771
772/*
773 * Must be paired with intel_pps_off().
774 * Nested calls to these functions are not allowed since
775 * we drop the lock. Caller must use some higher level
776 * locking to prevent nested calls from other threads.
777 */
778void intel_pps_vdd_on(struct intel_dp *intel_dp)
779{
780 struct drm_i915_private *i915 = dp_to_i915(intel_dp);
781 intel_wakeref_t wakeref;
782 bool vdd;
783
784 if (!intel_dp_is_edp(intel_dp))
785 return;
786
787 vdd = false;
788 with_intel_pps_lock(intel_dp, wakeref)
789 vdd = intel_pps_vdd_on_unlocked(intel_dp);
790 I915_STATE_WARN(i915, !vdd, "[ENCODER:%d:%s] %s VDD already requested on\n",
791 dp_to_dig_port(intel_dp)->base.base.base.id,
792 dp_to_dig_port(intel_dp)->base.base.name,
793 pps_name(i915, &intel_dp->pps));
794}
795
796static void intel_pps_vdd_off_sync_unlocked(struct intel_dp *intel_dp)
797{
798 struct drm_i915_private *dev_priv = dp_to_i915(intel_dp);
799 struct intel_digital_port *dig_port =
800 dp_to_dig_port(intel_dp);
801 u32 pp;
802 i915_reg_t pp_stat_reg, pp_ctrl_reg;
803
804 lockdep_assert_held(&dev_priv->display.pps.mutex);
805
806 drm_WARN_ON(&dev_priv->drm, intel_dp->pps.want_panel_vdd);
807
808 if (!edp_have_panel_vdd(intel_dp))
809 return;
810
811 drm_dbg_kms(&dev_priv->drm, "[ENCODER:%d:%s] %s turning VDD off\n",
812 dig_port->base.base.base.id, dig_port->base.base.name,
813 pps_name(dev_priv, &intel_dp->pps));
814
815 pp = ilk_get_pp_control(intel_dp);
816 pp &= ~EDP_FORCE_VDD;
817
818 pp_ctrl_reg = _pp_ctrl_reg(intel_dp);
819 pp_stat_reg = _pp_stat_reg(intel_dp);
820
821 intel_de_write(dev_priv, pp_ctrl_reg, pp);
822 intel_de_posting_read(dev_priv, pp_ctrl_reg);
823
824 /* Make sure sequencer is idle before allowing subsequent activity */
825 drm_dbg_kms(&dev_priv->drm, "[ENCODER:%d:%s] %s PP_STATUS: 0x%08x PP_CONTROL: 0x%08x\n",
826 dig_port->base.base.base.id, dig_port->base.base.name,
827 pps_name(dev_priv, &intel_dp->pps),
828 intel_de_read(dev_priv, pp_stat_reg),
829 intel_de_read(dev_priv, pp_ctrl_reg));
830
831 if ((pp & PANEL_POWER_ON) == 0)
832 intel_dp->pps.panel_power_off_time = ktime_get_boottime();
833
834 intel_display_power_put(dev_priv,
835 intel_aux_power_domain(dig_port),
836 fetch_and_zero(&intel_dp->pps.vdd_wakeref));
837}
838
839void intel_pps_vdd_off_sync(struct intel_dp *intel_dp)
840{
841 intel_wakeref_t wakeref;
842
843 if (!intel_dp_is_edp(intel_dp))
844 return;
845
846 cancel_delayed_work_sync(&intel_dp->pps.panel_vdd_work);
847 /*
848 * vdd might still be enabled due to the delayed vdd off.
849 * Make sure vdd is actually turned off here.
850 */
851 with_intel_pps_lock(intel_dp, wakeref)
852 intel_pps_vdd_off_sync_unlocked(intel_dp);
853}
854
855static void edp_panel_vdd_work(struct work_struct *__work)
856{
857 struct intel_pps *pps = container_of(to_delayed_work(__work),
858 struct intel_pps, panel_vdd_work);
859 struct intel_dp *intel_dp = container_of(pps, struct intel_dp, pps);
860 intel_wakeref_t wakeref;
861
862 with_intel_pps_lock(intel_dp, wakeref) {
863 if (!intel_dp->pps.want_panel_vdd)
864 intel_pps_vdd_off_sync_unlocked(intel_dp);
865 }
866}
867
868static void edp_panel_vdd_schedule_off(struct intel_dp *intel_dp)
869{
870 struct drm_i915_private *i915 = dp_to_i915(intel_dp);
871 unsigned long delay;
872
873 /*
874 * We may not yet know the real power sequencing delays,
875 * so keep VDD enabled until we're done with init.
876 */
877 if (intel_dp->pps.initializing)
878 return;
879
880 /*
881 * Queue the timer to fire a long time from now (relative to the power
882 * down delay) to keep the panel power up across a sequence of
883 * operations.
884 */
885 delay = msecs_to_jiffies(intel_dp->pps.panel_power_cycle_delay * 5);
886 queue_delayed_work(i915->unordered_wq,
887 &intel_dp->pps.panel_vdd_work, delay);
888}
889
890/*
891 * Must be paired with edp_panel_vdd_on().
892 * Must hold pps_mutex around the whole on/off sequence.
893 * Can be nested with intel_pps_vdd_{on,off}() calls.
894 */
895void intel_pps_vdd_off_unlocked(struct intel_dp *intel_dp, bool sync)
896{
897 struct drm_i915_private *dev_priv = dp_to_i915(intel_dp);
898
899 lockdep_assert_held(&dev_priv->display.pps.mutex);
900
901 if (!intel_dp_is_edp(intel_dp))
902 return;
903
904 I915_STATE_WARN(dev_priv, !intel_dp->pps.want_panel_vdd,
905 "[ENCODER:%d:%s] %s VDD not forced on",
906 dp_to_dig_port(intel_dp)->base.base.base.id,
907 dp_to_dig_port(intel_dp)->base.base.name,
908 pps_name(dev_priv, &intel_dp->pps));
909
910 intel_dp->pps.want_panel_vdd = false;
911
912 if (sync)
913 intel_pps_vdd_off_sync_unlocked(intel_dp);
914 else
915 edp_panel_vdd_schedule_off(intel_dp);
916}
917
918void intel_pps_on_unlocked(struct intel_dp *intel_dp)
919{
920 struct drm_i915_private *dev_priv = dp_to_i915(intel_dp);
921 u32 pp;
922 i915_reg_t pp_ctrl_reg;
923
924 lockdep_assert_held(&dev_priv->display.pps.mutex);
925
926 if (!intel_dp_is_edp(intel_dp))
927 return;
928
929 drm_dbg_kms(&dev_priv->drm, "[ENCODER:%d:%s] %s turn panel power on\n",
930 dp_to_dig_port(intel_dp)->base.base.base.id,
931 dp_to_dig_port(intel_dp)->base.base.name,
932 pps_name(dev_priv, &intel_dp->pps));
933
934 if (drm_WARN(&dev_priv->drm, edp_have_panel_power(intel_dp),
935 "[ENCODER:%d:%s] %s panel power already on\n",
936 dp_to_dig_port(intel_dp)->base.base.base.id,
937 dp_to_dig_port(intel_dp)->base.base.name,
938 pps_name(dev_priv, &intel_dp->pps)))
939 return;
940
941 wait_panel_power_cycle(intel_dp);
942
943 pp_ctrl_reg = _pp_ctrl_reg(intel_dp);
944 pp = ilk_get_pp_control(intel_dp);
945 if (IS_IRONLAKE(dev_priv)) {
946 /* ILK workaround: disable reset around power sequence */
947 pp &= ~PANEL_POWER_RESET;
948 intel_de_write(dev_priv, pp_ctrl_reg, pp);
949 intel_de_posting_read(dev_priv, pp_ctrl_reg);
950 }
951
952 pp |= PANEL_POWER_ON;
953 if (!IS_IRONLAKE(dev_priv))
954 pp |= PANEL_POWER_RESET;
955
956 intel_de_write(dev_priv, pp_ctrl_reg, pp);
957 intel_de_posting_read(dev_priv, pp_ctrl_reg);
958
959 wait_panel_on(intel_dp);
960 intel_dp->pps.last_power_on = jiffies;
961
962 if (IS_IRONLAKE(dev_priv)) {
963 pp |= PANEL_POWER_RESET; /* restore panel reset bit */
964 intel_de_write(dev_priv, pp_ctrl_reg, pp);
965 intel_de_posting_read(dev_priv, pp_ctrl_reg);
966 }
967}
968
969void intel_pps_on(struct intel_dp *intel_dp)
970{
971 intel_wakeref_t wakeref;
972
973 if (!intel_dp_is_edp(intel_dp))
974 return;
975
976 with_intel_pps_lock(intel_dp, wakeref)
977 intel_pps_on_unlocked(intel_dp);
978}
979
980void intel_pps_off_unlocked(struct intel_dp *intel_dp)
981{
982 struct drm_i915_private *dev_priv = dp_to_i915(intel_dp);
983 struct intel_digital_port *dig_port = dp_to_dig_port(intel_dp);
984 u32 pp;
985 i915_reg_t pp_ctrl_reg;
986
987 lockdep_assert_held(&dev_priv->display.pps.mutex);
988
989 if (!intel_dp_is_edp(intel_dp))
990 return;
991
992 drm_dbg_kms(&dev_priv->drm, "[ENCODER:%d:%s] %s turn panel power off\n",
993 dig_port->base.base.base.id, dig_port->base.base.name,
994 pps_name(dev_priv, &intel_dp->pps));
995
996 drm_WARN(&dev_priv->drm, !intel_dp->pps.want_panel_vdd,
997 "[ENCODER:%d:%s] %s need VDD to turn off panel\n",
998 dig_port->base.base.base.id, dig_port->base.base.name,
999 pps_name(dev_priv, &intel_dp->pps));
1000
1001 pp = ilk_get_pp_control(intel_dp);
1002 /* We need to switch off panel power _and_ force vdd, for otherwise some
1003 * panels get very unhappy and cease to work. */
1004 pp &= ~(PANEL_POWER_ON | PANEL_POWER_RESET | EDP_FORCE_VDD |
1005 EDP_BLC_ENABLE);
1006
1007 pp_ctrl_reg = _pp_ctrl_reg(intel_dp);
1008
1009 intel_dp->pps.want_panel_vdd = false;
1010
1011 intel_de_write(dev_priv, pp_ctrl_reg, pp);
1012 intel_de_posting_read(dev_priv, pp_ctrl_reg);
1013
1014 wait_panel_off(intel_dp);
1015 intel_dp->pps.panel_power_off_time = ktime_get_boottime();
1016
1017 /* We got a reference when we enabled the VDD. */
1018 intel_display_power_put(dev_priv,
1019 intel_aux_power_domain(dig_port),
1020 fetch_and_zero(&intel_dp->pps.vdd_wakeref));
1021}
1022
1023void intel_pps_off(struct intel_dp *intel_dp)
1024{
1025 intel_wakeref_t wakeref;
1026
1027 if (!intel_dp_is_edp(intel_dp))
1028 return;
1029
1030 with_intel_pps_lock(intel_dp, wakeref)
1031 intel_pps_off_unlocked(intel_dp);
1032}
1033
1034/* Enable backlight in the panel power control. */
1035void intel_pps_backlight_on(struct intel_dp *intel_dp)
1036{
1037 struct drm_i915_private *dev_priv = dp_to_i915(intel_dp);
1038 intel_wakeref_t wakeref;
1039
1040 /*
1041 * If we enable the backlight right away following a panel power
1042 * on, we may see slight flicker as the panel syncs with the eDP
1043 * link. So delay a bit to make sure the image is solid before
1044 * allowing it to appear.
1045 */
1046 wait_backlight_on(intel_dp);
1047
1048 with_intel_pps_lock(intel_dp, wakeref) {
1049 i915_reg_t pp_ctrl_reg = _pp_ctrl_reg(intel_dp);
1050 u32 pp;
1051
1052 pp = ilk_get_pp_control(intel_dp);
1053 pp |= EDP_BLC_ENABLE;
1054
1055 intel_de_write(dev_priv, pp_ctrl_reg, pp);
1056 intel_de_posting_read(dev_priv, pp_ctrl_reg);
1057 }
1058}
1059
1060/* Disable backlight in the panel power control. */
1061void intel_pps_backlight_off(struct intel_dp *intel_dp)
1062{
1063 struct drm_i915_private *dev_priv = dp_to_i915(intel_dp);
1064 intel_wakeref_t wakeref;
1065
1066 if (!intel_dp_is_edp(intel_dp))
1067 return;
1068
1069 with_intel_pps_lock(intel_dp, wakeref) {
1070 i915_reg_t pp_ctrl_reg = _pp_ctrl_reg(intel_dp);
1071 u32 pp;
1072
1073 pp = ilk_get_pp_control(intel_dp);
1074 pp &= ~EDP_BLC_ENABLE;
1075
1076 intel_de_write(dev_priv, pp_ctrl_reg, pp);
1077 intel_de_posting_read(dev_priv, pp_ctrl_reg);
1078 }
1079
1080 intel_dp->pps.last_backlight_off = jiffies;
1081 edp_wait_backlight_off(intel_dp);
1082}
1083
1084/*
1085 * Hook for controlling the panel power control backlight through the bl_power
1086 * sysfs attribute. Take care to handle multiple calls.
1087 */
1088void intel_pps_backlight_power(struct intel_connector *connector, bool enable)
1089{
1090 struct drm_i915_private *i915 = to_i915(connector->base.dev);
1091 struct intel_dp *intel_dp = intel_attached_dp(connector);
1092 intel_wakeref_t wakeref;
1093 bool is_enabled;
1094
1095 is_enabled = false;
1096 with_intel_pps_lock(intel_dp, wakeref)
1097 is_enabled = ilk_get_pp_control(intel_dp) & EDP_BLC_ENABLE;
1098 if (is_enabled == enable)
1099 return;
1100
1101 drm_dbg_kms(&i915->drm, "panel power control backlight %s\n",
1102 enable ? "enable" : "disable");
1103
1104 if (enable)
1105 intel_pps_backlight_on(intel_dp);
1106 else
1107 intel_pps_backlight_off(intel_dp);
1108}
1109
1110static void vlv_detach_power_sequencer(struct intel_dp *intel_dp)
1111{
1112 struct intel_digital_port *dig_port = dp_to_dig_port(intel_dp);
1113 struct drm_i915_private *dev_priv = to_i915(dig_port->base.base.dev);
1114 enum pipe pipe = intel_dp->pps.pps_pipe;
1115 i915_reg_t pp_on_reg = PP_ON_DELAYS(pipe);
1116
1117 drm_WARN_ON(&dev_priv->drm, intel_dp->pps.active_pipe != INVALID_PIPE);
1118
1119 if (drm_WARN_ON(&dev_priv->drm, pipe != PIPE_A && pipe != PIPE_B))
1120 return;
1121
1122 intel_pps_vdd_off_sync_unlocked(intel_dp);
1123
1124 /*
1125 * VLV seems to get confused when multiple power sequencers
1126 * have the same port selected (even if only one has power/vdd
1127 * enabled). The failure manifests as vlv_wait_port_ready() failing
1128 * CHV on the other hand doesn't seem to mind having the same port
1129 * selected in multiple power sequencers, but let's clear the
1130 * port select always when logically disconnecting a power sequencer
1131 * from a port.
1132 */
1133 drm_dbg_kms(&dev_priv->drm,
1134 "detaching %s from [ENCODER:%d:%s]\n",
1135 pps_name(dev_priv, &intel_dp->pps),
1136 dig_port->base.base.base.id, dig_port->base.base.name);
1137 intel_de_write(dev_priv, pp_on_reg, 0);
1138 intel_de_posting_read(dev_priv, pp_on_reg);
1139
1140 intel_dp->pps.pps_pipe = INVALID_PIPE;
1141}
1142
1143static void vlv_steal_power_sequencer(struct drm_i915_private *dev_priv,
1144 enum pipe pipe)
1145{
1146 struct intel_encoder *encoder;
1147
1148 lockdep_assert_held(&dev_priv->display.pps.mutex);
1149
1150 for_each_intel_dp(&dev_priv->drm, encoder) {
1151 struct intel_dp *intel_dp = enc_to_intel_dp(encoder);
1152
1153 drm_WARN(&dev_priv->drm, intel_dp->pps.active_pipe == pipe,
1154 "stealing PPS %c from active [ENCODER:%d:%s]\n",
1155 pipe_name(pipe), encoder->base.base.id,
1156 encoder->base.name);
1157
1158 if (intel_dp->pps.pps_pipe != pipe)
1159 continue;
1160
1161 drm_dbg_kms(&dev_priv->drm,
1162 "stealing PPS %c from [ENCODER:%d:%s]\n",
1163 pipe_name(pipe), encoder->base.base.id,
1164 encoder->base.name);
1165
1166 /* make sure vdd is off before we steal it */
1167 vlv_detach_power_sequencer(intel_dp);
1168 }
1169}
1170
1171void vlv_pps_init(struct intel_encoder *encoder,
1172 const struct intel_crtc_state *crtc_state)
1173{
1174 struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
1175 struct intel_dp *intel_dp = enc_to_intel_dp(encoder);
1176 struct intel_crtc *crtc = to_intel_crtc(crtc_state->uapi.crtc);
1177
1178 lockdep_assert_held(&dev_priv->display.pps.mutex);
1179
1180 drm_WARN_ON(&dev_priv->drm, intel_dp->pps.active_pipe != INVALID_PIPE);
1181
1182 if (intel_dp->pps.pps_pipe != INVALID_PIPE &&
1183 intel_dp->pps.pps_pipe != crtc->pipe) {
1184 /*
1185 * If another power sequencer was being used on this
1186 * port previously make sure to turn off vdd there while
1187 * we still have control of it.
1188 */
1189 vlv_detach_power_sequencer(intel_dp);
1190 }
1191
1192 /*
1193 * We may be stealing the power
1194 * sequencer from another port.
1195 */
1196 vlv_steal_power_sequencer(dev_priv, crtc->pipe);
1197
1198 intel_dp->pps.active_pipe = crtc->pipe;
1199
1200 if (!intel_dp_is_edp(intel_dp))
1201 return;
1202
1203 /* now it's all ours */
1204 intel_dp->pps.pps_pipe = crtc->pipe;
1205
1206 drm_dbg_kms(&dev_priv->drm,
1207 "initializing %s for [ENCODER:%d:%s]\n",
1208 pps_name(dev_priv, &intel_dp->pps),
1209 encoder->base.base.id, encoder->base.name);
1210
1211 /* init power sequencer on this pipe and port */
1212 pps_init_delays(intel_dp);
1213 pps_init_registers(intel_dp, true);
1214}
1215
1216static void pps_vdd_init(struct intel_dp *intel_dp)
1217{
1218 struct drm_i915_private *dev_priv = dp_to_i915(intel_dp);
1219 struct intel_digital_port *dig_port = dp_to_dig_port(intel_dp);
1220
1221 lockdep_assert_held(&dev_priv->display.pps.mutex);
1222
1223 if (!edp_have_panel_vdd(intel_dp))
1224 return;
1225
1226 /*
1227 * The VDD bit needs a power domain reference, so if the bit is
1228 * already enabled when we boot or resume, grab this reference and
1229 * schedule a vdd off, so we don't hold on to the reference
1230 * indefinitely.
1231 */
1232 drm_dbg_kms(&dev_priv->drm,
1233 "[ENCODER:%d:%s] %s VDD left on by BIOS, adjusting state tracking\n",
1234 dig_port->base.base.base.id, dig_port->base.base.name,
1235 pps_name(dev_priv, &intel_dp->pps));
1236 drm_WARN_ON(&dev_priv->drm, intel_dp->pps.vdd_wakeref);
1237 intel_dp->pps.vdd_wakeref = intel_display_power_get(dev_priv,
1238 intel_aux_power_domain(dig_port));
1239}
1240
1241bool intel_pps_have_panel_power_or_vdd(struct intel_dp *intel_dp)
1242{
1243 intel_wakeref_t wakeref;
1244 bool have_power = false;
1245
1246 with_intel_pps_lock(intel_dp, wakeref) {
1247 have_power = edp_have_panel_power(intel_dp) ||
1248 edp_have_panel_vdd(intel_dp);
1249 }
1250
1251 return have_power;
1252}
1253
1254static void pps_init_timestamps(struct intel_dp *intel_dp)
1255{
1256 /*
1257 * Initialize panel power off time to 0, assuming panel power could have
1258 * been toggled between kernel boot and now only by a previously loaded
1259 * and removed i915, which has already ensured sufficient power off
1260 * delay at module remove.
1261 */
1262 intel_dp->pps.panel_power_off_time = 0;
1263 intel_dp->pps.last_power_on = jiffies;
1264 intel_dp->pps.last_backlight_off = jiffies;
1265}
1266
1267static void
1268intel_pps_readout_hw_state(struct intel_dp *intel_dp, struct edp_power_seq *seq)
1269{
1270 struct drm_i915_private *dev_priv = dp_to_i915(intel_dp);
1271 u32 pp_on, pp_off, pp_ctl;
1272 struct pps_registers regs;
1273
1274 intel_pps_get_registers(intel_dp, ®s);
1275
1276 pp_ctl = ilk_get_pp_control(intel_dp);
1277
1278 /* Ensure PPS is unlocked */
1279 if (!HAS_DDI(dev_priv))
1280 intel_de_write(dev_priv, regs.pp_ctrl, pp_ctl);
1281
1282 pp_on = intel_de_read(dev_priv, regs.pp_on);
1283 pp_off = intel_de_read(dev_priv, regs.pp_off);
1284
1285 /* Pull timing values out of registers */
1286 seq->t1_t3 = REG_FIELD_GET(PANEL_POWER_UP_DELAY_MASK, pp_on);
1287 seq->t8 = REG_FIELD_GET(PANEL_LIGHT_ON_DELAY_MASK, pp_on);
1288 seq->t9 = REG_FIELD_GET(PANEL_LIGHT_OFF_DELAY_MASK, pp_off);
1289 seq->t10 = REG_FIELD_GET(PANEL_POWER_DOWN_DELAY_MASK, pp_off);
1290
1291 if (i915_mmio_reg_valid(regs.pp_div)) {
1292 u32 pp_div;
1293
1294 pp_div = intel_de_read(dev_priv, regs.pp_div);
1295
1296 seq->t11_t12 = REG_FIELD_GET(PANEL_POWER_CYCLE_DELAY_MASK, pp_div) * 1000;
1297 } else {
1298 seq->t11_t12 = REG_FIELD_GET(BXT_POWER_CYCLE_DELAY_MASK, pp_ctl) * 1000;
1299 }
1300}
1301
1302static void
1303intel_pps_dump_state(struct intel_dp *intel_dp, const char *state_name,
1304 const struct edp_power_seq *seq)
1305{
1306 struct drm_i915_private *i915 = dp_to_i915(intel_dp);
1307
1308 drm_dbg_kms(&i915->drm, "%s t1_t3 %d t8 %d t9 %d t10 %d t11_t12 %d\n",
1309 state_name,
1310 seq->t1_t3, seq->t8, seq->t9, seq->t10, seq->t11_t12);
1311}
1312
1313static void
1314intel_pps_verify_state(struct intel_dp *intel_dp)
1315{
1316 struct drm_i915_private *i915 = dp_to_i915(intel_dp);
1317 struct edp_power_seq hw;
1318 struct edp_power_seq *sw = &intel_dp->pps.pps_delays;
1319
1320 intel_pps_readout_hw_state(intel_dp, &hw);
1321
1322 if (hw.t1_t3 != sw->t1_t3 || hw.t8 != sw->t8 || hw.t9 != sw->t9 ||
1323 hw.t10 != sw->t10 || hw.t11_t12 != sw->t11_t12) {
1324 drm_err(&i915->drm, "PPS state mismatch\n");
1325 intel_pps_dump_state(intel_dp, "sw", sw);
1326 intel_pps_dump_state(intel_dp, "hw", &hw);
1327 }
1328}
1329
1330static bool pps_delays_valid(struct edp_power_seq *delays)
1331{
1332 return delays->t1_t3 || delays->t8 || delays->t9 ||
1333 delays->t10 || delays->t11_t12;
1334}
1335
1336static void pps_init_delays_bios(struct intel_dp *intel_dp,
1337 struct edp_power_seq *bios)
1338{
1339 struct drm_i915_private *dev_priv = dp_to_i915(intel_dp);
1340
1341 lockdep_assert_held(&dev_priv->display.pps.mutex);
1342
1343 if (!pps_delays_valid(&intel_dp->pps.bios_pps_delays))
1344 intel_pps_readout_hw_state(intel_dp, &intel_dp->pps.bios_pps_delays);
1345
1346 *bios = intel_dp->pps.bios_pps_delays;
1347
1348 intel_pps_dump_state(intel_dp, "bios", bios);
1349}
1350
1351static void pps_init_delays_vbt(struct intel_dp *intel_dp,
1352 struct edp_power_seq *vbt)
1353{
1354 struct drm_i915_private *dev_priv = dp_to_i915(intel_dp);
1355 struct intel_connector *connector = intel_dp->attached_connector;
1356
1357 *vbt = connector->panel.vbt.edp.pps;
1358
1359 if (!pps_delays_valid(vbt))
1360 return;
1361
1362 /* On Toshiba Satellite P50-C-18C system the VBT T12 delay
1363 * of 500ms appears to be too short. Ocassionally the panel
1364 * just fails to power back on. Increasing the delay to 800ms
1365 * seems sufficient to avoid this problem.
1366 */
1367 if (intel_has_quirk(dev_priv, QUIRK_INCREASE_T12_DELAY)) {
1368 vbt->t11_t12 = max_t(u16, vbt->t11_t12, 1300 * 10);
1369 drm_dbg_kms(&dev_priv->drm,
1370 "Increasing T12 panel delay as per the quirk to %d\n",
1371 vbt->t11_t12);
1372 }
1373
1374 /* T11_T12 delay is special and actually in units of 100ms, but zero
1375 * based in the hw (so we need to add 100 ms). But the sw vbt
1376 * table multiplies it with 1000 to make it in units of 100usec,
1377 * too. */
1378 vbt->t11_t12 += 100 * 10;
1379
1380 intel_pps_dump_state(intel_dp, "vbt", vbt);
1381}
1382
1383static void pps_init_delays_spec(struct intel_dp *intel_dp,
1384 struct edp_power_seq *spec)
1385{
1386 struct drm_i915_private *dev_priv = dp_to_i915(intel_dp);
1387
1388 lockdep_assert_held(&dev_priv->display.pps.mutex);
1389
1390 /* Upper limits from eDP 1.3 spec. Note that we use the clunky units of
1391 * our hw here, which are all in 100usec. */
1392 spec->t1_t3 = 210 * 10;
1393 spec->t8 = 50 * 10; /* no limit for t8, use t7 instead */
1394 spec->t9 = 50 * 10; /* no limit for t9, make it symmetric with t8 */
1395 spec->t10 = 500 * 10;
1396 /* This one is special and actually in units of 100ms, but zero
1397 * based in the hw (so we need to add 100 ms). But the sw vbt
1398 * table multiplies it with 1000 to make it in units of 100usec,
1399 * too. */
1400 spec->t11_t12 = (510 + 100) * 10;
1401
1402 intel_pps_dump_state(intel_dp, "spec", spec);
1403}
1404
1405static void pps_init_delays(struct intel_dp *intel_dp)
1406{
1407 struct drm_i915_private *dev_priv = dp_to_i915(intel_dp);
1408 struct edp_power_seq cur, vbt, spec,
1409 *final = &intel_dp->pps.pps_delays;
1410
1411 lockdep_assert_held(&dev_priv->display.pps.mutex);
1412
1413 /* already initialized? */
1414 if (pps_delays_valid(final))
1415 return;
1416
1417 pps_init_delays_bios(intel_dp, &cur);
1418 pps_init_delays_vbt(intel_dp, &vbt);
1419 pps_init_delays_spec(intel_dp, &spec);
1420
1421 /* Use the max of the register settings and vbt. If both are
1422 * unset, fall back to the spec limits. */
1423#define assign_final(field) final->field = (max(cur.field, vbt.field) == 0 ? \
1424 spec.field : \
1425 max(cur.field, vbt.field))
1426 assign_final(t1_t3);
1427 assign_final(t8);
1428 assign_final(t9);
1429 assign_final(t10);
1430 assign_final(t11_t12);
1431#undef assign_final
1432
1433#define get_delay(field) (DIV_ROUND_UP(final->field, 10))
1434 intel_dp->pps.panel_power_up_delay = get_delay(t1_t3);
1435 intel_dp->pps.backlight_on_delay = get_delay(t8);
1436 intel_dp->pps.backlight_off_delay = get_delay(t9);
1437 intel_dp->pps.panel_power_down_delay = get_delay(t10);
1438 intel_dp->pps.panel_power_cycle_delay = get_delay(t11_t12);
1439#undef get_delay
1440
1441 drm_dbg_kms(&dev_priv->drm,
1442 "panel power up delay %d, power down delay %d, power cycle delay %d\n",
1443 intel_dp->pps.panel_power_up_delay,
1444 intel_dp->pps.panel_power_down_delay,
1445 intel_dp->pps.panel_power_cycle_delay);
1446
1447 drm_dbg_kms(&dev_priv->drm, "backlight on delay %d, off delay %d\n",
1448 intel_dp->pps.backlight_on_delay,
1449 intel_dp->pps.backlight_off_delay);
1450
1451 /*
1452 * We override the HW backlight delays to 1 because we do manual waits
1453 * on them. For T8, even BSpec recommends doing it. For T9, if we
1454 * don't do this, we'll end up waiting for the backlight off delay
1455 * twice: once when we do the manual sleep, and once when we disable
1456 * the panel and wait for the PP_STATUS bit to become zero.
1457 */
1458 final->t8 = 1;
1459 final->t9 = 1;
1460
1461 /*
1462 * HW has only a 100msec granularity for t11_t12 so round it up
1463 * accordingly.
1464 */
1465 final->t11_t12 = roundup(final->t11_t12, 100 * 10);
1466}
1467
1468static void pps_init_registers(struct intel_dp *intel_dp, bool force_disable_vdd)
1469{
1470 struct drm_i915_private *dev_priv = dp_to_i915(intel_dp);
1471 u32 pp_on, pp_off, port_sel = 0;
1472 int div = RUNTIME_INFO(dev_priv)->rawclk_freq / 1000;
1473 struct pps_registers regs;
1474 enum port port = dp_to_dig_port(intel_dp)->base.port;
1475 const struct edp_power_seq *seq = &intel_dp->pps.pps_delays;
1476
1477 lockdep_assert_held(&dev_priv->display.pps.mutex);
1478
1479 intel_pps_get_registers(intel_dp, ®s);
1480
1481 /*
1482 * On some VLV machines the BIOS can leave the VDD
1483 * enabled even on power sequencers which aren't
1484 * hooked up to any port. This would mess up the
1485 * power domain tracking the first time we pick
1486 * one of these power sequencers for use since
1487 * intel_pps_vdd_on_unlocked() would notice that the VDD was
1488 * already on and therefore wouldn't grab the power
1489 * domain reference. Disable VDD first to avoid this.
1490 * This also avoids spuriously turning the VDD on as
1491 * soon as the new power sequencer gets initialized.
1492 */
1493 if (force_disable_vdd) {
1494 u32 pp = ilk_get_pp_control(intel_dp);
1495
1496 drm_WARN(&dev_priv->drm, pp & PANEL_POWER_ON,
1497 "Panel power already on\n");
1498
1499 if (pp & EDP_FORCE_VDD)
1500 drm_dbg_kms(&dev_priv->drm,
1501 "VDD already on, disabling first\n");
1502
1503 pp &= ~EDP_FORCE_VDD;
1504
1505 intel_de_write(dev_priv, regs.pp_ctrl, pp);
1506 }
1507
1508 pp_on = REG_FIELD_PREP(PANEL_POWER_UP_DELAY_MASK, seq->t1_t3) |
1509 REG_FIELD_PREP(PANEL_LIGHT_ON_DELAY_MASK, seq->t8);
1510 pp_off = REG_FIELD_PREP(PANEL_LIGHT_OFF_DELAY_MASK, seq->t9) |
1511 REG_FIELD_PREP(PANEL_POWER_DOWN_DELAY_MASK, seq->t10);
1512
1513 /* Haswell doesn't have any port selection bits for the panel
1514 * power sequencer any more. */
1515 if (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv)) {
1516 port_sel = PANEL_PORT_SELECT_VLV(port);
1517 } else if (HAS_PCH_IBX(dev_priv) || HAS_PCH_CPT(dev_priv)) {
1518 switch (port) {
1519 case PORT_A:
1520 port_sel = PANEL_PORT_SELECT_DPA;
1521 break;
1522 case PORT_C:
1523 port_sel = PANEL_PORT_SELECT_DPC;
1524 break;
1525 case PORT_D:
1526 port_sel = PANEL_PORT_SELECT_DPD;
1527 break;
1528 default:
1529 MISSING_CASE(port);
1530 break;
1531 }
1532 }
1533
1534 pp_on |= port_sel;
1535
1536 intel_de_write(dev_priv, regs.pp_on, pp_on);
1537 intel_de_write(dev_priv, regs.pp_off, pp_off);
1538
1539 /*
1540 * Compute the divisor for the pp clock, simply match the Bspec formula.
1541 */
1542 if (i915_mmio_reg_valid(regs.pp_div))
1543 intel_de_write(dev_priv, regs.pp_div,
1544 REG_FIELD_PREP(PP_REFERENCE_DIVIDER_MASK, (100 * div) / 2 - 1) | REG_FIELD_PREP(PANEL_POWER_CYCLE_DELAY_MASK, DIV_ROUND_UP(seq->t11_t12, 1000)));
1545 else
1546 intel_de_rmw(dev_priv, regs.pp_ctrl, BXT_POWER_CYCLE_DELAY_MASK,
1547 REG_FIELD_PREP(BXT_POWER_CYCLE_DELAY_MASK,
1548 DIV_ROUND_UP(seq->t11_t12, 1000)));
1549
1550 drm_dbg_kms(&dev_priv->drm,
1551 "panel power sequencer register settings: PP_ON %#x, PP_OFF %#x, PP_DIV %#x\n",
1552 intel_de_read(dev_priv, regs.pp_on),
1553 intel_de_read(dev_priv, regs.pp_off),
1554 i915_mmio_reg_valid(regs.pp_div) ?
1555 intel_de_read(dev_priv, regs.pp_div) :
1556 (intel_de_read(dev_priv, regs.pp_ctrl) & BXT_POWER_CYCLE_DELAY_MASK));
1557}
1558
1559void intel_pps_encoder_reset(struct intel_dp *intel_dp)
1560{
1561 struct drm_i915_private *i915 = dp_to_i915(intel_dp);
1562 intel_wakeref_t wakeref;
1563
1564 if (!intel_dp_is_edp(intel_dp))
1565 return;
1566
1567 with_intel_pps_lock(intel_dp, wakeref) {
1568 /*
1569 * Reinit the power sequencer also on the resume path, in case
1570 * BIOS did something nasty with it.
1571 */
1572 if (IS_VALLEYVIEW(i915) || IS_CHERRYVIEW(i915))
1573 vlv_initial_power_sequencer_setup(intel_dp);
1574
1575 pps_init_delays(intel_dp);
1576 pps_init_registers(intel_dp, false);
1577 pps_vdd_init(intel_dp);
1578
1579 if (edp_have_panel_vdd(intel_dp))
1580 edp_panel_vdd_schedule_off(intel_dp);
1581 }
1582}
1583
1584bool intel_pps_init(struct intel_dp *intel_dp)
1585{
1586 intel_wakeref_t wakeref;
1587 bool ret;
1588
1589 intel_dp->pps.initializing = true;
1590 INIT_DELAYED_WORK(&intel_dp->pps.panel_vdd_work, edp_panel_vdd_work);
1591
1592 pps_init_timestamps(intel_dp);
1593
1594 with_intel_pps_lock(intel_dp, wakeref) {
1595 ret = pps_initial_setup(intel_dp);
1596
1597 pps_init_delays(intel_dp);
1598 pps_init_registers(intel_dp, false);
1599 pps_vdd_init(intel_dp);
1600 }
1601
1602 return ret;
1603}
1604
1605static void pps_init_late(struct intel_dp *intel_dp)
1606{
1607 struct drm_i915_private *i915 = dp_to_i915(intel_dp);
1608 struct intel_encoder *encoder = &dp_to_dig_port(intel_dp)->base;
1609 struct intel_connector *connector = intel_dp->attached_connector;
1610
1611 if (IS_VALLEYVIEW(i915) || IS_CHERRYVIEW(i915))
1612 return;
1613
1614 if (intel_num_pps(i915) < 2)
1615 return;
1616
1617 drm_WARN(&i915->drm, connector->panel.vbt.backlight.controller >= 0 &&
1618 intel_dp->pps.pps_idx != connector->panel.vbt.backlight.controller,
1619 "[ENCODER:%d:%s] power sequencer mismatch: %d (initial) vs. %d (VBT)\n",
1620 encoder->base.base.id, encoder->base.name,
1621 intel_dp->pps.pps_idx, connector->panel.vbt.backlight.controller);
1622
1623 if (connector->panel.vbt.backlight.controller >= 0)
1624 intel_dp->pps.pps_idx = connector->panel.vbt.backlight.controller;
1625}
1626
1627void intel_pps_init_late(struct intel_dp *intel_dp)
1628{
1629 intel_wakeref_t wakeref;
1630
1631 with_intel_pps_lock(intel_dp, wakeref) {
1632 /* Reinit delays after per-panel info has been parsed from VBT */
1633 pps_init_late(intel_dp);
1634
1635 memset(&intel_dp->pps.pps_delays, 0, sizeof(intel_dp->pps.pps_delays));
1636 pps_init_delays(intel_dp);
1637 pps_init_registers(intel_dp, false);
1638
1639 intel_dp->pps.initializing = false;
1640
1641 if (edp_have_panel_vdd(intel_dp))
1642 edp_panel_vdd_schedule_off(intel_dp);
1643 }
1644}
1645
1646void intel_pps_unlock_regs_wa(struct drm_i915_private *dev_priv)
1647{
1648 int pps_num;
1649 int pps_idx;
1650
1651 if (!HAS_DISPLAY(dev_priv) || HAS_DDI(dev_priv))
1652 return;
1653 /*
1654 * This w/a is needed at least on CPT/PPT, but to be sure apply it
1655 * everywhere where registers can be write protected.
1656 */
1657 pps_num = intel_num_pps(dev_priv);
1658
1659 for (pps_idx = 0; pps_idx < pps_num; pps_idx++)
1660 intel_de_rmw(dev_priv, PP_CONTROL(pps_idx),
1661 PANEL_UNLOCK_MASK, PANEL_UNLOCK_REGS);
1662}
1663
1664void intel_pps_setup(struct drm_i915_private *i915)
1665{
1666 if (HAS_PCH_SPLIT(i915) || IS_GEMINILAKE(i915) || IS_BROXTON(i915))
1667 i915->display.pps.mmio_base = PCH_PPS_BASE;
1668 else if (IS_VALLEYVIEW(i915) || IS_CHERRYVIEW(i915))
1669 i915->display.pps.mmio_base = VLV_PPS_BASE;
1670 else
1671 i915->display.pps.mmio_base = PPS_BASE;
1672}
1673
1674void assert_pps_unlocked(struct drm_i915_private *dev_priv, enum pipe pipe)
1675{
1676 i915_reg_t pp_reg;
1677 u32 val;
1678 enum pipe panel_pipe = INVALID_PIPE;
1679 bool locked = true;
1680
1681 if (drm_WARN_ON(&dev_priv->drm, HAS_DDI(dev_priv)))
1682 return;
1683
1684 if (HAS_PCH_SPLIT(dev_priv)) {
1685 u32 port_sel;
1686
1687 pp_reg = PP_CONTROL(0);
1688 port_sel = intel_de_read(dev_priv, PP_ON_DELAYS(0)) & PANEL_PORT_SELECT_MASK;
1689
1690 switch (port_sel) {
1691 case PANEL_PORT_SELECT_LVDS:
1692 intel_lvds_port_enabled(dev_priv, PCH_LVDS, &panel_pipe);
1693 break;
1694 case PANEL_PORT_SELECT_DPA:
1695 g4x_dp_port_enabled(dev_priv, DP_A, PORT_A, &panel_pipe);
1696 break;
1697 case PANEL_PORT_SELECT_DPC:
1698 g4x_dp_port_enabled(dev_priv, PCH_DP_C, PORT_C, &panel_pipe);
1699 break;
1700 case PANEL_PORT_SELECT_DPD:
1701 g4x_dp_port_enabled(dev_priv, PCH_DP_D, PORT_D, &panel_pipe);
1702 break;
1703 default:
1704 MISSING_CASE(port_sel);
1705 break;
1706 }
1707 } else if (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv)) {
1708 /* presumably write lock depends on pipe, not port select */
1709 pp_reg = PP_CONTROL(pipe);
1710 panel_pipe = pipe;
1711 } else {
1712 u32 port_sel;
1713
1714 pp_reg = PP_CONTROL(0);
1715 port_sel = intel_de_read(dev_priv, PP_ON_DELAYS(0)) & PANEL_PORT_SELECT_MASK;
1716
1717 drm_WARN_ON(&dev_priv->drm,
1718 port_sel != PANEL_PORT_SELECT_LVDS);
1719 intel_lvds_port_enabled(dev_priv, LVDS, &panel_pipe);
1720 }
1721
1722 val = intel_de_read(dev_priv, pp_reg);
1723 if (!(val & PANEL_POWER_ON) ||
1724 ((val & PANEL_UNLOCK_MASK) == PANEL_UNLOCK_REGS))
1725 locked = false;
1726
1727 I915_STATE_WARN(dev_priv, panel_pipe == pipe && locked,
1728 "panel assertion failure, pipe %c regs locked\n",
1729 pipe_name(pipe));
1730}