1 // SPDX-License-Identifier: MIT
2 /*
3 * Copyright © 2022-2023 Intel Corporation
4 *
5 * High level display driver entry points. This is a layer between top level
6 * driver code and low level display functionality; no low level display code or
7 * details here.
8 */
9
10 #include <linux/vga_switcheroo.h>
11 #include <acpi/video.h>
12 #include <drm/display/drm_dp_mst_helper.h>
13 #include <drm/drm_atomic_helper.h>
14 #include <drm/drm_client.h>
15 #include <drm/drm_mode_config.h>
16 #include <drm/drm_privacy_screen_consumer.h>
17 #include <drm/drm_probe_helper.h>
18 #include <drm/drm_vblank.h>
19
20 #include "i915_drv.h"
21 #include "i9xx_wm.h"
22 #include "intel_acpi.h"
23 #include "intel_atomic.h"
24 #include "intel_audio.h"
25 #include "intel_bios.h"
26 #include "intel_bw.h"
27 #include "intel_cdclk.h"
28 #include "intel_color.h"
29 #include "intel_crtc.h"
30 #include "intel_display_debugfs.h"
31 #include "intel_display_driver.h"
32 #include "intel_display_irq.h"
33 #include "intel_display_power.h"
34 #include "intel_display_types.h"
35 #include "intel_display_wa.h"
36 #include "intel_dkl_phy.h"
37 #include "intel_dmc.h"
38 #include "intel_dp.h"
39 #include "intel_dp_tunnel.h"
40 #include "intel_dpll.h"
41 #include "intel_dpll_mgr.h"
42 #include "intel_fb.h"
43 #include "intel_fbc.h"
44 #include "intel_fbdev.h"
45 #include "intel_fdi.h"
46 #include "intel_gmbus.h"
47 #include "intel_hdcp.h"
48 #include "intel_hotplug.h"
49 #include "intel_hti.h"
50 #include "intel_modeset_lock.h"
51 #include "intel_modeset_setup.h"
52 #include "intel_opregion.h"
53 #include "intel_overlay.h"
54 #include "intel_plane_initial.h"
55 #include "intel_pmdemand.h"
56 #include "intel_pps.h"
57 #include "intel_quirks.h"
58 #include "intel_vga.h"
59 #include "intel_wm.h"
60 #include "skl_watermark.h"
61
intel_display_driver_probe_defer(struct pci_dev * pdev)62 bool intel_display_driver_probe_defer(struct pci_dev *pdev)
63 {
64 struct drm_privacy_screen *privacy_screen;
65
66 /*
67 * apple-gmux is needed on dual GPU MacBook Pro
68 * to probe the panel if we're the inactive GPU.
69 */
70 if (vga_switcheroo_client_probe_defer(pdev))
71 return true;
72
73 /* If the LCD panel has a privacy-screen, wait for it */
74 privacy_screen = drm_privacy_screen_get(&pdev->dev, NULL);
75 if (IS_ERR(privacy_screen) && PTR_ERR(privacy_screen) == -EPROBE_DEFER)
76 return true;
77
78 drm_privacy_screen_put(privacy_screen);
79
80 return false;
81 }
82
intel_display_driver_init_hw(struct drm_i915_private * i915)83 void intel_display_driver_init_hw(struct drm_i915_private *i915)
84 {
85 struct intel_cdclk_state *cdclk_state;
86
87 if (!HAS_DISPLAY(i915))
88 return;
89
90 cdclk_state = to_intel_cdclk_state(i915->display.cdclk.obj.state);
91
92 intel_update_cdclk(i915);
93 intel_cdclk_dump_config(i915, &i915->display.cdclk.hw, "Current CDCLK");
94 cdclk_state->logical = cdclk_state->actual = i915->display.cdclk.hw;
95
96 intel_display_wa_apply(i915);
97 }
98
99 static const struct drm_mode_config_funcs intel_mode_funcs = {
100 .fb_create = intel_user_framebuffer_create,
101 .get_format_info = intel_fb_get_format_info,
102 .mode_valid = intel_mode_valid,
103 .atomic_check = intel_atomic_check,
104 .atomic_commit = intel_atomic_commit,
105 .atomic_state_alloc = intel_atomic_state_alloc,
106 .atomic_state_clear = intel_atomic_state_clear,
107 .atomic_state_free = intel_atomic_state_free,
108 };
109
110 static const struct drm_mode_config_helper_funcs intel_mode_config_funcs = {
111 .atomic_commit_setup = drm_dp_mst_atomic_setup_commit,
112 };
113
intel_mode_config_init(struct drm_i915_private * i915)114 static void intel_mode_config_init(struct drm_i915_private *i915)
115 {
116 struct drm_mode_config *mode_config = &i915->drm.mode_config;
117
118 drm_mode_config_init(&i915->drm);
119 INIT_LIST_HEAD(&i915->display.global.obj_list);
120
121 mode_config->min_width = 0;
122 mode_config->min_height = 0;
123
124 mode_config->preferred_depth = 24;
125 mode_config->prefer_shadow = 1;
126
127 mode_config->funcs = &intel_mode_funcs;
128 mode_config->helper_private = &intel_mode_config_funcs;
129
130 mode_config->async_page_flip = HAS_ASYNC_FLIPS(i915);
131
132 /*
133 * Maximum framebuffer dimensions, chosen to match
134 * the maximum render engine surface size on gen4+.
135 */
136 if (DISPLAY_VER(i915) >= 7) {
137 mode_config->max_width = 16384;
138 mode_config->max_height = 16384;
139 } else if (DISPLAY_VER(i915) >= 4) {
140 mode_config->max_width = 8192;
141 mode_config->max_height = 8192;
142 } else if (DISPLAY_VER(i915) == 3) {
143 mode_config->max_width = 4096;
144 mode_config->max_height = 4096;
145 } else {
146 mode_config->max_width = 2048;
147 mode_config->max_height = 2048;
148 }
149
150 if (IS_I845G(i915) || IS_I865G(i915)) {
151 mode_config->cursor_width = IS_I845G(i915) ? 64 : 512;
152 mode_config->cursor_height = 1023;
153 } else if (IS_I830(i915) || IS_I85X(i915) ||
154 IS_I915G(i915) || IS_I915GM(i915)) {
155 mode_config->cursor_width = 64;
156 mode_config->cursor_height = 64;
157 } else {
158 mode_config->cursor_width = 256;
159 mode_config->cursor_height = 256;
160 }
161 }
162
intel_mode_config_cleanup(struct drm_i915_private * i915)163 static void intel_mode_config_cleanup(struct drm_i915_private *i915)
164 {
165 intel_atomic_global_obj_cleanup(i915);
166 drm_mode_config_cleanup(&i915->drm);
167 }
168
intel_plane_possible_crtcs_init(struct drm_i915_private * dev_priv)169 static void intel_plane_possible_crtcs_init(struct drm_i915_private *dev_priv)
170 {
171 struct intel_plane *plane;
172
173 for_each_intel_plane(&dev_priv->drm, plane) {
174 struct intel_crtc *crtc = intel_crtc_for_pipe(dev_priv,
175 plane->pipe);
176
177 plane->base.possible_crtcs = drm_crtc_mask(&crtc->base);
178 }
179 }
180
intel_display_driver_early_probe(struct drm_i915_private * i915)181 void intel_display_driver_early_probe(struct drm_i915_private *i915)
182 {
183 if (!HAS_DISPLAY(i915))
184 return;
185
186 spin_lock_init(&i915->display.fb_tracking.lock);
187 mutex_init(&i915->display.backlight.lock);
188 mutex_init(&i915->display.audio.mutex);
189 mutex_init(&i915->display.wm.wm_mutex);
190 mutex_init(&i915->display.pps.mutex);
191 mutex_init(&i915->display.hdcp.hdcp_mutex);
192
193 intel_display_irq_init(i915);
194 intel_dkl_phy_init(i915);
195 intel_color_init_hooks(i915);
196 intel_init_cdclk_hooks(i915);
197 intel_audio_hooks_init(i915);
198 intel_dpll_init_clock_hook(i915);
199 intel_init_display_hooks(i915);
200 intel_fdi_init_hook(i915);
201 intel_dmc_wl_init(&i915->display);
202 }
203
204 /* part #1: call before irq install */
intel_display_driver_probe_noirq(struct drm_i915_private * i915)205 int intel_display_driver_probe_noirq(struct drm_i915_private *i915)
206 {
207 struct intel_display *display = &i915->display;
208 int ret;
209
210 if (i915_inject_probe_failure(i915))
211 return -ENODEV;
212
213 if (HAS_DISPLAY(i915)) {
214 ret = drm_vblank_init(&i915->drm,
215 INTEL_NUM_PIPES(i915));
216 if (ret)
217 return ret;
218 }
219
220 intel_bios_init(i915);
221
222 ret = intel_vga_register(i915);
223 if (ret)
224 goto cleanup_bios;
225
226 /* FIXME: completely on the wrong abstraction layer */
227 ret = intel_power_domains_init(i915);
228 if (ret < 0)
229 goto cleanup_vga;
230
231 intel_pmdemand_init_early(i915);
232
233 intel_power_domains_init_hw(i915, false);
234
235 if (!HAS_DISPLAY(i915))
236 return 0;
237
238 intel_dmc_init(i915);
239
240 i915->display.wq.modeset = alloc_ordered_workqueue("i915_modeset", 0);
241 i915->display.wq.flip = alloc_workqueue("i915_flip", WQ_HIGHPRI |
242 WQ_UNBOUND, WQ_UNBOUND_MAX_ACTIVE);
243
244 intel_mode_config_init(i915);
245
246 ret = intel_cdclk_init(i915);
247 if (ret)
248 goto cleanup_vga_client_pw_domain_dmc;
249
250 ret = intel_color_init(i915);
251 if (ret)
252 goto cleanup_vga_client_pw_domain_dmc;
253
254 ret = intel_dbuf_init(i915);
255 if (ret)
256 goto cleanup_vga_client_pw_domain_dmc;
257
258 ret = intel_bw_init(i915);
259 if (ret)
260 goto cleanup_vga_client_pw_domain_dmc;
261
262 ret = intel_pmdemand_init(i915);
263 if (ret)
264 goto cleanup_vga_client_pw_domain_dmc;
265
266 intel_init_quirks(display);
267
268 intel_fbc_init(i915);
269
270 return 0;
271
272 cleanup_vga_client_pw_domain_dmc:
273 intel_dmc_fini(i915);
274 intel_power_domains_driver_remove(i915);
275 cleanup_vga:
276 intel_vga_unregister(i915);
277 cleanup_bios:
278 intel_bios_driver_remove(i915);
279
280 return ret;
281 }
282
set_display_access(struct drm_i915_private * i915,bool any_task_allowed,struct task_struct * allowed_task)283 static void set_display_access(struct drm_i915_private *i915,
284 bool any_task_allowed,
285 struct task_struct *allowed_task)
286 {
287 struct drm_modeset_acquire_ctx ctx;
288 int err;
289
290 intel_modeset_lock_ctx_retry(&ctx, NULL, 0, err) {
291 err = drm_modeset_lock_all_ctx(&i915->drm, &ctx);
292 if (err)
293 continue;
294
295 i915->display.access.any_task_allowed = any_task_allowed;
296 i915->display.access.allowed_task = allowed_task;
297 }
298
299 drm_WARN_ON(&i915->drm, err);
300 }
301
302 /**
303 * intel_display_driver_enable_user_access - Enable display HW access for all threads
304 * @i915: i915 device instance
305 *
306 * Enable the display HW access for all threads. Examples for such accesses
307 * are modeset commits and connector probing.
308 *
309 * This function should be called during driver loading and system resume once
310 * all the HW initialization steps are done.
311 */
intel_display_driver_enable_user_access(struct drm_i915_private * i915)312 void intel_display_driver_enable_user_access(struct drm_i915_private *i915)
313 {
314 set_display_access(i915, true, NULL);
315
316 intel_hpd_enable_detection_work(i915);
317 }
318
319 /**
320 * intel_display_driver_disable_user_access - Disable display HW access for user threads
321 * @i915: i915 device instance
322 *
323 * Disable the display HW access for user threads. Examples for such accesses
324 * are modeset commits and connector probing. For the current thread the
325 * access is still enabled, which should only perform HW init/deinit
326 * programming (as the initial modeset during driver loading or the disabling
327 * modeset during driver unloading and system suspend/shutdown). This function
328 * should be followed by calling either intel_display_driver_enable_user_access()
329 * after completing the HW init programming or
330 * intel_display_driver_suspend_access() after completing the HW deinit
331 * programming.
332 *
333 * This function should be called during driver loading/unloading and system
334 * suspend/shutdown before starting the HW init/deinit programming.
335 */
intel_display_driver_disable_user_access(struct drm_i915_private * i915)336 void intel_display_driver_disable_user_access(struct drm_i915_private *i915)
337 {
338 intel_hpd_disable_detection_work(i915);
339
340 set_display_access(i915, false, current);
341 }
342
343 /**
344 * intel_display_driver_suspend_access - Suspend display HW access for all threads
345 * @i915: i915 device instance
346 *
347 * Disable the display HW access for all threads. Examples for such accesses
348 * are modeset commits and connector probing. This call should be either
349 * followed by calling intel_display_driver_resume_access(), or the driver
350 * should be unloaded/shutdown.
351 *
352 * This function should be called during driver unloading and system
353 * suspend/shutdown after completing the HW deinit programming.
354 */
intel_display_driver_suspend_access(struct drm_i915_private * i915)355 void intel_display_driver_suspend_access(struct drm_i915_private *i915)
356 {
357 set_display_access(i915, false, NULL);
358 }
359
360 /**
361 * intel_display_driver_resume_access - Resume display HW access for the resume thread
362 * @i915: i915 device instance
363 *
364 * Enable the display HW access for the current resume thread, keeping the
365 * access disabled for all other (user) threads. Examples for such accesses
366 * are modeset commits and connector probing. The resume thread should only
367 * perform HW init programming (as the restoring modeset). This function
368 * should be followed by calling intel_display_driver_enable_user_access(),
369 * after completing the HW init programming steps.
370 *
371 * This function should be called during system resume before starting the HW
372 * init steps.
373 */
intel_display_driver_resume_access(struct drm_i915_private * i915)374 void intel_display_driver_resume_access(struct drm_i915_private *i915)
375 {
376 set_display_access(i915, false, current);
377 }
378
379 /**
380 * intel_display_driver_check_access - Check if the current thread has disaplay HW access
381 * @i915: i915 device instance
382 *
383 * Check whether the current thread has display HW access, print a debug
384 * message if it doesn't. Such accesses are modeset commits and connector
385 * probing. If the function returns %false any HW access should be prevented.
386 *
387 * Returns %true if the current thread has display HW access, %false
388 * otherwise.
389 */
intel_display_driver_check_access(struct drm_i915_private * i915)390 bool intel_display_driver_check_access(struct drm_i915_private *i915)
391 {
392 char comm[TASK_COMM_LEN];
393 char current_task[TASK_COMM_LEN + 16];
394 char allowed_task[TASK_COMM_LEN + 16] = "none";
395
396 if (i915->display.access.any_task_allowed ||
397 i915->display.access.allowed_task == current)
398 return true;
399
400 snprintf(current_task, sizeof(current_task), "%s[%d]",
401 get_task_comm(comm, current),
402 task_pid_vnr(current));
403
404 if (i915->display.access.allowed_task)
405 snprintf(allowed_task, sizeof(allowed_task), "%s[%d]",
406 get_task_comm(comm, i915->display.access.allowed_task),
407 task_pid_vnr(i915->display.access.allowed_task));
408
409 drm_dbg_kms(&i915->drm,
410 "Reject display access from task %s (allowed to %s)\n",
411 current_task, allowed_task);
412
413 return false;
414 }
415
416 /* part #2: call after irq install, but before gem init */
intel_display_driver_probe_nogem(struct drm_i915_private * i915)417 int intel_display_driver_probe_nogem(struct drm_i915_private *i915)
418 {
419 struct drm_device *dev = &i915->drm;
420 enum pipe pipe;
421 int ret;
422
423 if (!HAS_DISPLAY(i915))
424 return 0;
425
426 intel_wm_init(i915);
427
428 intel_panel_sanitize_ssc(i915);
429
430 intel_pps_setup(i915);
431
432 intel_gmbus_setup(i915);
433
434 drm_dbg_kms(&i915->drm, "%d display pipe%s available.\n",
435 INTEL_NUM_PIPES(i915),
436 INTEL_NUM_PIPES(i915) > 1 ? "s" : "");
437
438 for_each_pipe(i915, pipe) {
439 ret = intel_crtc_init(i915, pipe);
440 if (ret)
441 goto err_mode_config;
442 }
443
444 intel_plane_possible_crtcs_init(i915);
445 intel_shared_dpll_init(i915);
446 intel_fdi_pll_freq_update(i915);
447
448 intel_update_czclk(i915);
449 intel_display_driver_init_hw(i915);
450 intel_dpll_update_ref_clks(i915);
451
452 if (i915->display.cdclk.max_cdclk_freq == 0)
453 intel_update_max_cdclk(i915);
454
455 intel_hti_init(i915);
456
457 /* Just disable it once at startup */
458 intel_vga_disable(i915);
459 intel_setup_outputs(i915);
460
461 ret = intel_dp_tunnel_mgr_init(i915);
462 if (ret)
463 goto err_hdcp;
464
465 intel_display_driver_disable_user_access(i915);
466
467 drm_modeset_lock_all(dev);
468 intel_modeset_setup_hw_state(i915, dev->mode_config.acquire_ctx);
469 intel_acpi_assign_connector_fwnodes(i915);
470 drm_modeset_unlock_all(dev);
471
472 intel_initial_plane_config(i915);
473
474 /*
475 * Make sure hardware watermarks really match the state we read out.
476 * Note that we need to do this after reconstructing the BIOS fb's
477 * since the watermark calculation done here will use pstate->fb.
478 */
479 if (!HAS_GMCH(i915))
480 ilk_wm_sanitize(i915);
481
482 return 0;
483
484 err_hdcp:
485 intel_hdcp_component_fini(i915);
486 err_mode_config:
487 intel_mode_config_cleanup(i915);
488
489 return ret;
490 }
491
492 /* part #3: call after gem init */
intel_display_driver_probe(struct drm_i915_private * i915)493 int intel_display_driver_probe(struct drm_i915_private *i915)
494 {
495 int ret;
496
497 if (!HAS_DISPLAY(i915))
498 return 0;
499
500 /*
501 * This will bind stuff into ggtt, so it needs to be done after
502 * the BIOS fb takeover and whatever else magic ggtt reservations
503 * happen during gem/ggtt init.
504 */
505 intel_hdcp_component_init(i915);
506
507 /*
508 * Force all active planes to recompute their states. So that on
509 * mode_setcrtc after probe, all the intel_plane_state variables
510 * are already calculated and there is no assert_plane warnings
511 * during bootup.
512 */
513 ret = intel_initial_commit(&i915->drm);
514 if (ret)
515 drm_dbg_kms(&i915->drm, "Initial modeset failed, %d\n", ret);
516
517 intel_overlay_setup(i915);
518
519 /* Only enable hotplug handling once the fbdev is fully set up. */
520 intel_hpd_init(i915);
521
522 skl_watermark_ipc_init(i915);
523
524 return 0;
525 }
526
intel_display_driver_register(struct drm_i915_private * i915)527 void intel_display_driver_register(struct drm_i915_private *i915)
528 {
529 struct drm_printer p = drm_dbg_printer(&i915->drm, DRM_UT_KMS,
530 "i915 display info:");
531
532 if (!HAS_DISPLAY(i915))
533 return;
534
535 /* Must be done after probing outputs */
536 intel_opregion_register(i915);
537 intel_acpi_video_register(i915);
538
539 intel_audio_init(i915);
540
541 intel_display_driver_enable_user_access(i915);
542
543 intel_audio_register(i915);
544
545 intel_display_debugfs_register(i915);
546
547 /*
548 * We need to coordinate the hotplugs with the asynchronous
549 * fbdev configuration, for which we use the
550 * fbdev->async_cookie.
551 */
552 drm_kms_helper_poll_init(&i915->drm);
553 intel_hpd_poll_disable(i915);
554
555 intel_fbdev_setup(i915);
556
557 intel_display_device_info_print(DISPLAY_INFO(i915),
558 DISPLAY_RUNTIME_INFO(i915), &p);
559 }
560
561 /* part #1: call before irq uninstall */
intel_display_driver_remove(struct drm_i915_private * i915)562 void intel_display_driver_remove(struct drm_i915_private *i915)
563 {
564 if (!HAS_DISPLAY(i915))
565 return;
566
567 flush_workqueue(i915->display.wq.flip);
568 flush_workqueue(i915->display.wq.modeset);
569
570 /*
571 * MST topology needs to be suspended so we don't have any calls to
572 * fbdev after it's finalized. MST will be destroyed later as part of
573 * drm_mode_config_cleanup()
574 */
575 intel_dp_mst_suspend(i915);
576 }
577
578 /* part #2: call after irq uninstall */
intel_display_driver_remove_noirq(struct drm_i915_private * i915)579 void intel_display_driver_remove_noirq(struct drm_i915_private *i915)
580 {
581 if (!HAS_DISPLAY(i915))
582 return;
583
584 intel_display_driver_suspend_access(i915);
585
586 /*
587 * Due to the hpd irq storm handling the hotplug work can re-arm the
588 * poll handlers. Hence disable polling after hpd handling is shut down.
589 */
590 intel_hpd_poll_fini(i915);
591
592 intel_unregister_dsm_handler();
593
594 /* flush any delayed tasks or pending work */
595 flush_workqueue(i915->unordered_wq);
596
597 intel_hdcp_component_fini(i915);
598
599 intel_mode_config_cleanup(i915);
600
601 intel_dp_tunnel_mgr_cleanup(i915);
602
603 intel_overlay_cleanup(i915);
604
605 intel_gmbus_teardown(i915);
606
607 destroy_workqueue(i915->display.wq.flip);
608 destroy_workqueue(i915->display.wq.modeset);
609
610 intel_fbc_cleanup(i915);
611 }
612
613 /* part #3: call after gem init */
intel_display_driver_remove_nogem(struct drm_i915_private * i915)614 void intel_display_driver_remove_nogem(struct drm_i915_private *i915)
615 {
616 intel_dmc_fini(i915);
617
618 intel_power_domains_driver_remove(i915);
619
620 intel_vga_unregister(i915);
621
622 intel_bios_driver_remove(i915);
623 }
624
intel_display_driver_unregister(struct drm_i915_private * i915)625 void intel_display_driver_unregister(struct drm_i915_private *i915)
626 {
627 if (!HAS_DISPLAY(i915))
628 return;
629
630 drm_client_dev_unregister(&i915->drm);
631
632 /*
633 * After flushing the fbdev (incl. a late async config which
634 * will have delayed queuing of a hotplug event), then flush
635 * the hotplug events.
636 */
637 drm_kms_helper_poll_fini(&i915->drm);
638
639 intel_display_driver_disable_user_access(i915);
640
641 intel_audio_deinit(i915);
642
643 drm_atomic_helper_shutdown(&i915->drm);
644
645 acpi_video_unregister();
646 intel_opregion_unregister(i915);
647 }
648
649 /*
650 * turn all crtc's off, but do not adjust state
651 * This has to be paired with a call to intel_modeset_setup_hw_state.
652 */
intel_display_driver_suspend(struct drm_i915_private * i915)653 int intel_display_driver_suspend(struct drm_i915_private *i915)
654 {
655 struct drm_atomic_state *state;
656 int ret;
657
658 if (!HAS_DISPLAY(i915))
659 return 0;
660
661 state = drm_atomic_helper_suspend(&i915->drm);
662 ret = PTR_ERR_OR_ZERO(state);
663 if (ret)
664 drm_err(&i915->drm, "Suspending crtc's failed with %i\n",
665 ret);
666 else
667 i915->display.restore.modeset_state = state;
668 return ret;
669 }
670
671 int
__intel_display_driver_resume(struct drm_i915_private * i915,struct drm_atomic_state * state,struct drm_modeset_acquire_ctx * ctx)672 __intel_display_driver_resume(struct drm_i915_private *i915,
673 struct drm_atomic_state *state,
674 struct drm_modeset_acquire_ctx *ctx)
675 {
676 struct drm_crtc_state *crtc_state;
677 struct drm_crtc *crtc;
678 int ret, i;
679
680 intel_modeset_setup_hw_state(i915, ctx);
681 intel_vga_redisable(i915);
682
683 if (!state)
684 return 0;
685
686 /*
687 * We've duplicated the state, pointers to the old state are invalid.
688 *
689 * Don't attempt to use the old state until we commit the duplicated state.
690 */
691 for_each_new_crtc_in_state(state, crtc, crtc_state, i) {
692 /*
693 * Force recalculation even if we restore
694 * current state. With fast modeset this may not result
695 * in a modeset when the state is compatible.
696 */
697 crtc_state->mode_changed = true;
698 }
699
700 /* ignore any reset values/BIOS leftovers in the WM registers */
701 if (!HAS_GMCH(i915))
702 to_intel_atomic_state(state)->skip_intermediate_wm = true;
703
704 ret = drm_atomic_helper_commit_duplicated_state(state, ctx);
705
706 drm_WARN_ON(&i915->drm, ret == -EDEADLK);
707
708 return ret;
709 }
710
intel_display_driver_resume(struct drm_i915_private * i915)711 void intel_display_driver_resume(struct drm_i915_private *i915)
712 {
713 struct drm_atomic_state *state = i915->display.restore.modeset_state;
714 struct drm_modeset_acquire_ctx ctx;
715 int ret;
716
717 if (!HAS_DISPLAY(i915))
718 return;
719
720 i915->display.restore.modeset_state = NULL;
721 if (state)
722 state->acquire_ctx = &ctx;
723
724 drm_modeset_acquire_init(&ctx, 0);
725
726 while (1) {
727 ret = drm_modeset_lock_all_ctx(&i915->drm, &ctx);
728 if (ret != -EDEADLK)
729 break;
730
731 drm_modeset_backoff(&ctx);
732 }
733
734 if (!ret)
735 ret = __intel_display_driver_resume(i915, state, &ctx);
736
737 skl_watermark_ipc_update(i915);
738 drm_modeset_drop_locks(&ctx);
739 drm_modeset_acquire_fini(&ctx);
740
741 if (ret)
742 drm_err(&i915->drm,
743 "Restoring old state failed with %i\n", ret);
744 if (state)
745 drm_atomic_state_put(state);
746 }
747