xref: /linux/drivers/gpu/drm/xe/display/xe_display.c (revision a4871e6201c46c8e1d04308265b4b4c5753c8209) 
1 // SPDX-License-Identifier: MIT
2 /*
3  * Copyright © 2023 Intel Corporation
4  */
5 
6 #include "xe_display.h"
7 #include "regs/xe_irq_regs.h"
8 
9 #include <linux/fb.h>
10 
11 #include <drm/drm_client.h>
12 #include <drm/drm_client_event.h>
13 #include <drm/drm_drv.h>
14 #include <drm/drm_managed.h>
15 #include <drm/drm_probe_helper.h>
16 #include <uapi/drm/xe_drm.h>
17 
18 #include "soc/intel_dram.h"
19 #include "intel_acpi.h"
20 #include "intel_audio.h"
21 #include "intel_bw.h"
22 #include "intel_display.h"
23 #include "intel_display_driver.h"
24 #include "intel_display_irq.h"
25 #include "intel_display_types.h"
26 #include "intel_dmc.h"
27 #include "intel_dmc_wl.h"
28 #include "intel_dp.h"
29 #include "intel_encoder.h"
30 #include "intel_fbdev.h"
31 #include "intel_hdcp.h"
32 #include "intel_hotplug.h"
33 #include "intel_opregion.h"
34 #include "skl_watermark.h"
35 #include "xe_module.h"
36 
37 /* Xe device functions */
38 
39 static bool has_display(struct xe_device *xe)
40 {
41 	return HAS_DISPLAY(&xe->display);
42 }
43 
44 /**
45  * xe_display_driver_probe_defer - Detect if we need to wait for other drivers
46  *				   early on
47  * @pdev: PCI device
48  *
49  * Returns: true if probe needs to be deferred, false otherwise
50  */
51 bool xe_display_driver_probe_defer(struct pci_dev *pdev)
52 {
53 	if (!xe_modparam.probe_display)
54 		return 0;
55 
56 	return intel_display_driver_probe_defer(pdev);
57 }
58 
59 /**
60  * xe_display_driver_set_hooks - Add driver flags and hooks for display
61  * @driver: DRM device driver
62  *
63  * Set features and function hooks in @driver that are needed for driving the
64  * display IP. This sets the driver's capability of driving display, regardless
65  * if the device has it enabled
66  */
67 void xe_display_driver_set_hooks(struct drm_driver *driver)
68 {
69 	if (!xe_modparam.probe_display)
70 		return;
71 
72 #ifdef CONFIG_DRM_FBDEV_EMULATION
73 	driver->fbdev_probe = intel_fbdev_driver_fbdev_probe;
74 #endif
75 
76 	driver->driver_features |= DRIVER_MODESET | DRIVER_ATOMIC;
77 }
78 
79 static void unset_display_features(struct xe_device *xe)
80 {
81 	xe->drm.driver_features &= ~(DRIVER_MODESET | DRIVER_ATOMIC);
82 }
83 
84 static void display_destroy(struct drm_device *dev, void *dummy)
85 {
86 	struct xe_device *xe = to_xe_device(dev);
87 
88 	destroy_workqueue(xe->display.hotplug.dp_wq);
89 }
90 
91 /**
92  * xe_display_create - create display struct
93  * @xe: XE device instance
94  *
95  * Initialize all fields used by the display part.
96  *
97  * TODO: once everything can be inside a single struct, make the struct opaque
98  * to the rest of xe and return it to be xe->display.
99  *
100  * Returns: 0 on success
101  */
102 int xe_display_create(struct xe_device *xe)
103 {
104 	spin_lock_init(&xe->display.fb_tracking.lock);
105 
106 	xe->display.hotplug.dp_wq = alloc_ordered_workqueue("xe-dp", 0);
107 
108 	return drmm_add_action_or_reset(&xe->drm, display_destroy, NULL);
109 }
110 
111 static void xe_display_fini_early(void *arg)
112 {
113 	struct xe_device *xe = arg;
114 	struct intel_display *display = &xe->display;
115 
116 	if (!xe->info.probe_display)
117 		return;
118 
119 	intel_display_driver_remove_nogem(display);
120 	intel_display_driver_remove_noirq(display);
121 	intel_opregion_cleanup(display);
122 	intel_power_domains_cleanup(display);
123 }
124 
125 int xe_display_init_early(struct xe_device *xe)
126 {
127 	struct intel_display *display = &xe->display;
128 	int err;
129 
130 	if (!xe->info.probe_display)
131 		return 0;
132 
133 	/* Fake uncore lock */
134 	spin_lock_init(&xe->uncore.lock);
135 
136 	/* This must be called before any calls to HAS_PCH_* */
137 	intel_detect_pch(xe);
138 
139 	intel_display_driver_early_probe(display);
140 
141 	/* Early display init.. */
142 	intel_opregion_setup(display);
143 
144 	/*
145 	 * Fill the dram structure to get the system dram info. This will be
146 	 * used for memory latency calculation.
147 	 */
148 	intel_dram_detect(xe);
149 
150 	intel_bw_init_hw(display);
151 
152 	intel_display_device_info_runtime_init(display);
153 
154 	err = intel_display_driver_probe_noirq(display);
155 	if (err)
156 		goto err_opregion;
157 
158 	err = intel_display_driver_probe_nogem(display);
159 	if (err)
160 		goto err_noirq;
161 
162 	return devm_add_action_or_reset(xe->drm.dev, xe_display_fini_early, xe);
163 err_noirq:
164 	intel_display_driver_remove_noirq(display);
165 	intel_power_domains_cleanup(display);
166 err_opregion:
167 	intel_opregion_cleanup(display);
168 	return err;
169 }
170 
171 static void xe_display_fini(void *arg)
172 {
173 	struct xe_device *xe = arg;
174 	struct intel_display *display = &xe->display;
175 
176 	intel_hpd_poll_fini(display);
177 	intel_hdcp_component_fini(display);
178 	intel_audio_deinit(display);
179 	intel_display_driver_remove(display);
180 }
181 
182 int xe_display_init(struct xe_device *xe)
183 {
184 	struct intel_display *display = &xe->display;
185 	int err;
186 
187 	if (!xe->info.probe_display)
188 		return 0;
189 
190 	err = intel_display_driver_probe(display);
191 	if (err)
192 		return err;
193 
194 	return devm_add_action_or_reset(xe->drm.dev, xe_display_fini, xe);
195 }
196 
197 void xe_display_register(struct xe_device *xe)
198 {
199 	struct intel_display *display = &xe->display;
200 
201 	if (!xe->info.probe_display)
202 		return;
203 
204 	intel_display_driver_register(display);
205 	intel_power_domains_enable(display);
206 }
207 
208 void xe_display_unregister(struct xe_device *xe)
209 {
210 	struct intel_display *display = &xe->display;
211 
212 	if (!xe->info.probe_display)
213 		return;
214 
215 	intel_power_domains_disable(display);
216 	intel_display_driver_unregister(display);
217 }
218 
219 /* IRQ-related functions */
220 
221 void xe_display_irq_handler(struct xe_device *xe, u32 master_ctl)
222 {
223 	struct intel_display *display = &xe->display;
224 
225 	if (!xe->info.probe_display)
226 		return;
227 
228 	if (master_ctl & DISPLAY_IRQ)
229 		gen11_display_irq_handler(display);
230 }
231 
232 void xe_display_irq_enable(struct xe_device *xe, u32 gu_misc_iir)
233 {
234 	struct intel_display *display = &xe->display;
235 
236 	if (!xe->info.probe_display)
237 		return;
238 
239 	if (gu_misc_iir & GU_MISC_GSE)
240 		intel_opregion_asle_intr(display);
241 }
242 
243 void xe_display_irq_reset(struct xe_device *xe)
244 {
245 	struct intel_display *display = &xe->display;
246 
247 	if (!xe->info.probe_display)
248 		return;
249 
250 	gen11_display_irq_reset(display);
251 }
252 
253 void xe_display_irq_postinstall(struct xe_device *xe, struct xe_gt *gt)
254 {
255 	struct intel_display *display = &xe->display;
256 
257 	if (!xe->info.probe_display)
258 		return;
259 
260 	if (gt->info.id == XE_GT0)
261 		gen11_de_irq_postinstall(display);
262 }
263 
264 static bool suspend_to_idle(void)
265 {
266 #if IS_ENABLED(CONFIG_ACPI_SLEEP)
267 	if (acpi_target_system_state() < ACPI_STATE_S3)
268 		return true;
269 #endif
270 	return false;
271 }
272 
273 static void xe_display_flush_cleanup_work(struct xe_device *xe)
274 {
275 	struct intel_crtc *crtc;
276 
277 	for_each_intel_crtc(&xe->drm, crtc) {
278 		struct drm_crtc_commit *commit;
279 
280 		spin_lock(&crtc->base.commit_lock);
281 		commit = list_first_entry_or_null(&crtc->base.commit_list,
282 						  struct drm_crtc_commit, commit_entry);
283 		if (commit)
284 			drm_crtc_commit_get(commit);
285 		spin_unlock(&crtc->base.commit_lock);
286 
287 		if (commit) {
288 			wait_for_completion(&commit->cleanup_done);
289 			drm_crtc_commit_put(commit);
290 		}
291 	}
292 }
293 
294 static void xe_display_enable_d3cold(struct xe_device *xe)
295 {
296 	struct intel_display *display = &xe->display;
297 
298 	if (!xe->info.probe_display)
299 		return;
300 
301 	/*
302 	 * We do a lot of poking in a lot of registers, make sure they work
303 	 * properly.
304 	 */
305 	intel_power_domains_disable(display);
306 
307 	xe_display_flush_cleanup_work(xe);
308 
309 	intel_opregion_suspend(display, PCI_D3cold);
310 
311 	intel_dmc_suspend(display);
312 
313 	if (has_display(xe))
314 		intel_hpd_poll_enable(display);
315 }
316 
317 static void xe_display_disable_d3cold(struct xe_device *xe)
318 {
319 	struct intel_display *display = &xe->display;
320 
321 	if (!xe->info.probe_display)
322 		return;
323 
324 	intel_dmc_resume(display);
325 
326 	if (has_display(xe))
327 		drm_mode_config_reset(&xe->drm);
328 
329 	intel_display_driver_init_hw(display);
330 
331 	intel_hpd_init(display);
332 
333 	if (has_display(xe))
334 		intel_hpd_poll_disable(display);
335 
336 	intel_opregion_resume(display);
337 
338 	intel_power_domains_enable(display);
339 }
340 
341 void xe_display_pm_suspend(struct xe_device *xe)
342 {
343 	struct intel_display *display = &xe->display;
344 	bool s2idle = suspend_to_idle();
345 
346 	if (!xe->info.probe_display)
347 		return;
348 
349 	/*
350 	 * We do a lot of poking in a lot of registers, make sure they work
351 	 * properly.
352 	 */
353 	intel_power_domains_disable(display);
354 	drm_client_dev_suspend(&xe->drm, false);
355 
356 	if (has_display(xe)) {
357 		drm_kms_helper_poll_disable(&xe->drm);
358 		intel_display_driver_disable_user_access(display);
359 		intel_display_driver_suspend(display);
360 	}
361 
362 	xe_display_flush_cleanup_work(xe);
363 
364 	intel_hpd_cancel_work(display);
365 
366 	if (has_display(xe)) {
367 		intel_display_driver_suspend_access(display);
368 		intel_encoder_suspend_all(&xe->display);
369 	}
370 
371 	intel_opregion_suspend(display, s2idle ? PCI_D1 : PCI_D3cold);
372 
373 	intel_dmc_suspend(display);
374 }
375 
376 void xe_display_pm_shutdown(struct xe_device *xe)
377 {
378 	struct intel_display *display = &xe->display;
379 
380 	if (!xe->info.probe_display)
381 		return;
382 
383 	intel_power_domains_disable(display);
384 	drm_client_dev_suspend(&xe->drm, false);
385 
386 	if (has_display(xe)) {
387 		drm_kms_helper_poll_disable(&xe->drm);
388 		intel_display_driver_disable_user_access(display);
389 		intel_display_driver_suspend(display);
390 	}
391 
392 	xe_display_flush_cleanup_work(xe);
393 	intel_dp_mst_suspend(display);
394 	intel_hpd_cancel_work(display);
395 
396 	if (has_display(xe))
397 		intel_display_driver_suspend_access(display);
398 
399 	intel_encoder_suspend_all(display);
400 	intel_encoder_shutdown_all(display);
401 
402 	intel_opregion_suspend(display, PCI_D3cold);
403 
404 	intel_dmc_suspend(display);
405 }
406 
407 void xe_display_pm_runtime_suspend(struct xe_device *xe)
408 {
409 	struct intel_display *display = &xe->display;
410 
411 	if (!xe->info.probe_display)
412 		return;
413 
414 	if (xe->d3cold.allowed) {
415 		xe_display_enable_d3cold(xe);
416 		return;
417 	}
418 
419 	intel_hpd_poll_enable(display);
420 }
421 
422 void xe_display_pm_suspend_late(struct xe_device *xe)
423 {
424 	struct intel_display *display = &xe->display;
425 	bool s2idle = suspend_to_idle();
426 
427 	if (!xe->info.probe_display)
428 		return;
429 
430 	intel_display_power_suspend_late(display, s2idle);
431 }
432 
433 void xe_display_pm_runtime_suspend_late(struct xe_device *xe)
434 {
435 	struct intel_display *display = &xe->display;
436 
437 	if (!xe->info.probe_display)
438 		return;
439 
440 	if (xe->d3cold.allowed)
441 		xe_display_pm_suspend_late(xe);
442 
443 	/*
444 	 * If xe_display_pm_suspend_late() is not called, it is likely
445 	 * that we will be on dynamic DC states with DMC wakelock enabled. We
446 	 * need to flush the release work in that case.
447 	 */
448 	intel_dmc_wl_flush_release_work(display);
449 }
450 
451 void xe_display_pm_shutdown_late(struct xe_device *xe)
452 {
453 	struct intel_display *display = &xe->display;
454 
455 	if (!xe->info.probe_display)
456 		return;
457 
458 	/*
459 	 * The only requirement is to reboot with display DC states disabled,
460 	 * for now leaving all display power wells in the INIT power domain
461 	 * enabled.
462 	 */
463 	intel_power_domains_driver_remove(display);
464 }
465 
466 void xe_display_pm_resume_early(struct xe_device *xe)
467 {
468 	struct intel_display *display = &xe->display;
469 
470 	if (!xe->info.probe_display)
471 		return;
472 
473 	intel_display_power_resume_early(display);
474 }
475 
476 void xe_display_pm_resume(struct xe_device *xe)
477 {
478 	struct intel_display *display = &xe->display;
479 
480 	if (!xe->info.probe_display)
481 		return;
482 
483 	intel_dmc_resume(display);
484 
485 	if (has_display(xe))
486 		drm_mode_config_reset(&xe->drm);
487 
488 	intel_display_driver_init_hw(display);
489 
490 	if (has_display(xe))
491 		intel_display_driver_resume_access(display);
492 
493 	intel_hpd_init(display);
494 
495 	if (has_display(xe)) {
496 		intel_display_driver_resume(display);
497 		drm_kms_helper_poll_enable(&xe->drm);
498 		intel_display_driver_enable_user_access(display);
499 	}
500 
501 	if (has_display(xe))
502 		intel_hpd_poll_disable(display);
503 
504 	intel_opregion_resume(display);
505 
506 	drm_client_dev_resume(&xe->drm, false);
507 
508 	intel_power_domains_enable(display);
509 }
510 
511 void xe_display_pm_runtime_resume(struct xe_device *xe)
512 {
513 	struct intel_display *display = &xe->display;
514 
515 	if (!xe->info.probe_display)
516 		return;
517 
518 	if (xe->d3cold.allowed) {
519 		xe_display_disable_d3cold(xe);
520 		return;
521 	}
522 
523 	intel_hpd_init(display);
524 	intel_hpd_poll_disable(display);
525 	skl_watermark_ipc_update(display);
526 }
527 
528 
529 static void display_device_remove(struct drm_device *dev, void *arg)
530 {
531 	struct intel_display *display = arg;
532 
533 	intel_display_device_remove(display);
534 }
535 
536 int xe_display_probe(struct xe_device *xe)
537 {
538 	struct pci_dev *pdev = to_pci_dev(xe->drm.dev);
539 	struct intel_display *display;
540 	int err;
541 
542 	if (!xe->info.probe_display)
543 		goto no_display;
544 
545 	display = intel_display_device_probe(pdev);
546 
547 	err = drmm_add_action_or_reset(&xe->drm, display_device_remove, display);
548 	if (err)
549 		return err;
550 
551 	if (has_display(xe))
552 		return 0;
553 
554 no_display:
555 	xe->info.probe_display = false;
556 	unset_display_features(xe);
557 	return 0;
558 }
559