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1/*
2 * Copyright (C) 2014 Red Hat
3 * Copyright (C) 2014 Intel Corp.
4 *
5 * Permission is hereby granted, free of charge, to any person obtaining a
6 * copy of this software and associated documentation files (the "Software"),
7 * to deal in the Software without restriction, including without limitation
8 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
9 * and/or sell copies of the Software, and to permit persons to whom the
10 * Software is furnished to do so, subject to the following conditions:
11 *
12 * The above copyright notice and this permission notice shall be included in
13 * all copies or substantial portions of the Software.
14 *
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
18 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
19 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
20 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
21 * OTHER DEALINGS IN THE SOFTWARE.
22 *
23 * Authors:
24 * Rob Clark <robdclark@gmail.com>
25 * Daniel Vetter <daniel.vetter@ffwll.ch>
26 */
27
28
29#include <drm/drmP.h>
30#include <drm/drm_atomic.h>
31#include <drm/drm_mode.h>
32#include <drm/drm_plane_helper.h>
33
34/**
35 * drm_atomic_state_default_release -
36 * release memory initialized by drm_atomic_state_init
37 * @state: atomic state
38 *
39 * Free all the memory allocated by drm_atomic_state_init.
40 * This is useful for drivers that subclass the atomic state.
41 */
42void drm_atomic_state_default_release(struct drm_atomic_state *state)
43{
44 kfree(state->connectors);
45 kfree(state->connector_states);
46 kfree(state->crtcs);
47 kfree(state->crtc_states);
48 kfree(state->planes);
49 kfree(state->plane_states);
50}
51EXPORT_SYMBOL(drm_atomic_state_default_release);
52
53/**
54 * drm_atomic_state_init - init new atomic state
55 * @dev: DRM device
56 * @state: atomic state
57 *
58 * Default implementation for filling in a new atomic state.
59 * This is useful for drivers that subclass the atomic state.
60 */
61int
62drm_atomic_state_init(struct drm_device *dev, struct drm_atomic_state *state)
63{
64 /* TODO legacy paths should maybe do a better job about
65 * setting this appropriately?
66 */
67 state->allow_modeset = true;
68
69 state->crtcs = kcalloc(dev->mode_config.num_crtc,
70 sizeof(*state->crtcs), GFP_KERNEL);
71 if (!state->crtcs)
72 goto fail;
73 state->crtc_states = kcalloc(dev->mode_config.num_crtc,
74 sizeof(*state->crtc_states), GFP_KERNEL);
75 if (!state->crtc_states)
76 goto fail;
77 state->planes = kcalloc(dev->mode_config.num_total_plane,
78 sizeof(*state->planes), GFP_KERNEL);
79 if (!state->planes)
80 goto fail;
81 state->plane_states = kcalloc(dev->mode_config.num_total_plane,
82 sizeof(*state->plane_states), GFP_KERNEL);
83 if (!state->plane_states)
84 goto fail;
85
86 state->dev = dev;
87
88 DRM_DEBUG_ATOMIC("Allocated atomic state %p\n", state);
89
90 return 0;
91fail:
92 drm_atomic_state_default_release(state);
93 return -ENOMEM;
94}
95EXPORT_SYMBOL(drm_atomic_state_init);
96
97/**
98 * drm_atomic_state_alloc - allocate atomic state
99 * @dev: DRM device
100 *
101 * This allocates an empty atomic state to track updates.
102 */
103struct drm_atomic_state *
104drm_atomic_state_alloc(struct drm_device *dev)
105{
106 struct drm_mode_config *config = &dev->mode_config;
107 struct drm_atomic_state *state;
108
109 if (!config->funcs->atomic_state_alloc) {
110 state = kzalloc(sizeof(*state), GFP_KERNEL);
111 if (!state)
112 return NULL;
113 if (drm_atomic_state_init(dev, state) < 0) {
114 kfree(state);
115 return NULL;
116 }
117 return state;
118 }
119
120 return config->funcs->atomic_state_alloc(dev);
121}
122EXPORT_SYMBOL(drm_atomic_state_alloc);
123
124/**
125 * drm_atomic_state_default_clear - clear base atomic state
126 * @state: atomic state
127 *
128 * Default implementation for clearing atomic state.
129 * This is useful for drivers that subclass the atomic state.
130 */
131void drm_atomic_state_default_clear(struct drm_atomic_state *state)
132{
133 struct drm_device *dev = state->dev;
134 struct drm_mode_config *config = &dev->mode_config;
135 int i;
136
137 DRM_DEBUG_ATOMIC("Clearing atomic state %p\n", state);
138
139 for (i = 0; i < state->num_connector; i++) {
140 struct drm_connector *connector = state->connectors[i];
141
142 if (!connector)
143 continue;
144
145 /*
146 * FIXME: Async commits can race with connector unplugging and
147 * there's currently nothing that prevents cleanup up state for
148 * deleted connectors. As long as the callback doesn't look at
149 * the connector we'll be fine though, so make sure that's the
150 * case by setting all connector pointers to NULL.
151 */
152 state->connector_states[i]->connector = NULL;
153 connector->funcs->atomic_destroy_state(NULL,
154 state->connector_states[i]);
155 state->connectors[i] = NULL;
156 state->connector_states[i] = NULL;
157 }
158
159 for (i = 0; i < config->num_crtc; i++) {
160 struct drm_crtc *crtc = state->crtcs[i];
161
162 if (!crtc)
163 continue;
164
165 crtc->funcs->atomic_destroy_state(crtc,
166 state->crtc_states[i]);
167 state->crtcs[i] = NULL;
168 state->crtc_states[i] = NULL;
169 }
170
171 for (i = 0; i < config->num_total_plane; i++) {
172 struct drm_plane *plane = state->planes[i];
173
174 if (!plane)
175 continue;
176
177 plane->funcs->atomic_destroy_state(plane,
178 state->plane_states[i]);
179 state->planes[i] = NULL;
180 state->plane_states[i] = NULL;
181 }
182}
183EXPORT_SYMBOL(drm_atomic_state_default_clear);
184
185/**
186 * drm_atomic_state_clear - clear state object
187 * @state: atomic state
188 *
189 * When the w/w mutex algorithm detects a deadlock we need to back off and drop
190 * all locks. So someone else could sneak in and change the current modeset
191 * configuration. Which means that all the state assembled in @state is no
192 * longer an atomic update to the current state, but to some arbitrary earlier
193 * state. Which could break assumptions the driver's ->atomic_check likely
194 * relies on.
195 *
196 * Hence we must clear all cached state and completely start over, using this
197 * function.
198 */
199void drm_atomic_state_clear(struct drm_atomic_state *state)
200{
201 struct drm_device *dev = state->dev;
202 struct drm_mode_config *config = &dev->mode_config;
203
204 if (config->funcs->atomic_state_clear)
205 config->funcs->atomic_state_clear(state);
206 else
207 drm_atomic_state_default_clear(state);
208}
209EXPORT_SYMBOL(drm_atomic_state_clear);
210
211/**
212 * drm_atomic_state_free - free all memory for an atomic state
213 * @state: atomic state to deallocate
214 *
215 * This frees all memory associated with an atomic state, including all the
216 * per-object state for planes, crtcs and connectors.
217 */
218void drm_atomic_state_free(struct drm_atomic_state *state)
219{
220 struct drm_device *dev;
221 struct drm_mode_config *config;
222
223 if (!state)
224 return;
225
226 dev = state->dev;
227 config = &dev->mode_config;
228
229 drm_atomic_state_clear(state);
230
231 DRM_DEBUG_ATOMIC("Freeing atomic state %p\n", state);
232
233 if (config->funcs->atomic_state_free) {
234 config->funcs->atomic_state_free(state);
235 } else {
236 drm_atomic_state_default_release(state);
237 kfree(state);
238 }
239}
240EXPORT_SYMBOL(drm_atomic_state_free);
241
242/**
243 * drm_atomic_get_crtc_state - get crtc state
244 * @state: global atomic state object
245 * @crtc: crtc to get state object for
246 *
247 * This function returns the crtc state for the given crtc, allocating it if
248 * needed. It will also grab the relevant crtc lock to make sure that the state
249 * is consistent.
250 *
251 * Returns:
252 *
253 * Either the allocated state or the error code encoded into the pointer. When
254 * the error is EDEADLK then the w/w mutex code has detected a deadlock and the
255 * entire atomic sequence must be restarted. All other errors are fatal.
256 */
257struct drm_crtc_state *
258drm_atomic_get_crtc_state(struct drm_atomic_state *state,
259 struct drm_crtc *crtc)
260{
261 int ret, index = drm_crtc_index(crtc);
262 struct drm_crtc_state *crtc_state;
263
264 crtc_state = drm_atomic_get_existing_crtc_state(state, crtc);
265 if (crtc_state)
266 return crtc_state;
267
268 ret = drm_modeset_lock(&crtc->mutex, state->acquire_ctx);
269 if (ret)
270 return ERR_PTR(ret);
271
272 crtc_state = crtc->funcs->atomic_duplicate_state(crtc);
273 if (!crtc_state)
274 return ERR_PTR(-ENOMEM);
275
276 state->crtc_states[index] = crtc_state;
277 state->crtcs[index] = crtc;
278 crtc_state->state = state;
279
280 DRM_DEBUG_ATOMIC("Added [CRTC:%d:%s] %p state to %p\n",
281 crtc->base.id, crtc->name, crtc_state, state);
282
283 return crtc_state;
284}
285EXPORT_SYMBOL(drm_atomic_get_crtc_state);
286
287/**
288 * drm_atomic_set_mode_for_crtc - set mode for CRTC
289 * @state: the CRTC whose incoming state to update
290 * @mode: kernel-internal mode to use for the CRTC, or NULL to disable
291 *
292 * Set a mode (originating from the kernel) on the desired CRTC state. Does
293 * not change any other state properties, including enable, active, or
294 * mode_changed.
295 *
296 * RETURNS:
297 * Zero on success, error code on failure. Cannot return -EDEADLK.
298 */
299int drm_atomic_set_mode_for_crtc(struct drm_crtc_state *state,
300 struct drm_display_mode *mode)
301{
302 struct drm_mode_modeinfo umode;
303
304 /* Early return for no change. */
305 if (mode && memcmp(&state->mode, mode, sizeof(*mode)) == 0)
306 return 0;
307
308 drm_property_unreference_blob(state->mode_blob);
309 state->mode_blob = NULL;
310
311 if (mode) {
312 drm_mode_convert_to_umode(&umode, mode);
313 state->mode_blob =
314 drm_property_create_blob(state->crtc->dev,
315 sizeof(umode),
316 &umode);
317 if (IS_ERR(state->mode_blob))
318 return PTR_ERR(state->mode_blob);
319
320 drm_mode_copy(&state->mode, mode);
321 state->enable = true;
322 DRM_DEBUG_ATOMIC("Set [MODE:%s] for CRTC state %p\n",
323 mode->name, state);
324 } else {
325 memset(&state->mode, 0, sizeof(state->mode));
326 state->enable = false;
327 DRM_DEBUG_ATOMIC("Set [NOMODE] for CRTC state %p\n",
328 state);
329 }
330
331 return 0;
332}
333EXPORT_SYMBOL(drm_atomic_set_mode_for_crtc);
334
335/**
336 * drm_atomic_set_mode_prop_for_crtc - set mode for CRTC
337 * @state: the CRTC whose incoming state to update
338 * @blob: pointer to blob property to use for mode
339 *
340 * Set a mode (originating from a blob property) on the desired CRTC state.
341 * This function will take a reference on the blob property for the CRTC state,
342 * and release the reference held on the state's existing mode property, if any
343 * was set.
344 *
345 * RETURNS:
346 * Zero on success, error code on failure. Cannot return -EDEADLK.
347 */
348int drm_atomic_set_mode_prop_for_crtc(struct drm_crtc_state *state,
349 struct drm_property_blob *blob)
350{
351 if (blob == state->mode_blob)
352 return 0;
353
354 drm_property_unreference_blob(state->mode_blob);
355 state->mode_blob = NULL;
356
357 if (blob) {
358 if (blob->length != sizeof(struct drm_mode_modeinfo) ||
359 drm_mode_convert_umode(&state->mode,
360 (const struct drm_mode_modeinfo *)
361 blob->data))
362 return -EINVAL;
363
364 state->mode_blob = drm_property_reference_blob(blob);
365 state->enable = true;
366 DRM_DEBUG_ATOMIC("Set [MODE:%s] for CRTC state %p\n",
367 state->mode.name, state);
368 } else {
369 memset(&state->mode, 0, sizeof(state->mode));
370 state->enable = false;
371 DRM_DEBUG_ATOMIC("Set [NOMODE] for CRTC state %p\n",
372 state);
373 }
374
375 return 0;
376}
377EXPORT_SYMBOL(drm_atomic_set_mode_prop_for_crtc);
378
379/**
380 * drm_atomic_replace_property_blob - replace a blob property
381 * @blob: a pointer to the member blob to be replaced
382 * @new_blob: the new blob to replace with
383 * @replaced: whether the blob has been replaced
384 *
385 * RETURNS:
386 * Zero on success, error code on failure
387 */
388static void
389drm_atomic_replace_property_blob(struct drm_property_blob **blob,
390 struct drm_property_blob *new_blob,
391 bool *replaced)
392{
393 struct drm_property_blob *old_blob = *blob;
394
395 if (old_blob == new_blob)
396 return;
397
398 if (old_blob)
399 drm_property_unreference_blob(old_blob);
400 if (new_blob)
401 drm_property_reference_blob(new_blob);
402 *blob = new_blob;
403 *replaced = true;
404
405 return;
406}
407
408static int
409drm_atomic_replace_property_blob_from_id(struct drm_crtc *crtc,
410 struct drm_property_blob **blob,
411 uint64_t blob_id,
412 ssize_t expected_size,
413 bool *replaced)
414{
415 struct drm_device *dev = crtc->dev;
416 struct drm_property_blob *new_blob = NULL;
417
418 if (blob_id != 0) {
419 new_blob = drm_property_lookup_blob(dev, blob_id);
420 if (new_blob == NULL)
421 return -EINVAL;
422 if (expected_size > 0 && expected_size != new_blob->length)
423 return -EINVAL;
424 }
425
426 drm_atomic_replace_property_blob(blob, new_blob, replaced);
427
428 return 0;
429}
430
431/**
432 * drm_atomic_crtc_set_property - set property on CRTC
433 * @crtc: the drm CRTC to set a property on
434 * @state: the state object to update with the new property value
435 * @property: the property to set
436 * @val: the new property value
437 *
438 * Use this instead of calling crtc->atomic_set_property directly.
439 * This function handles generic/core properties and calls out to
440 * driver's ->atomic_set_property() for driver properties. To ensure
441 * consistent behavior you must call this function rather than the
442 * driver hook directly.
443 *
444 * RETURNS:
445 * Zero on success, error code on failure
446 */
447int drm_atomic_crtc_set_property(struct drm_crtc *crtc,
448 struct drm_crtc_state *state, struct drm_property *property,
449 uint64_t val)
450{
451 struct drm_device *dev = crtc->dev;
452 struct drm_mode_config *config = &dev->mode_config;
453 bool replaced = false;
454 int ret;
455
456 if (property == config->prop_active)
457 state->active = val;
458 else if (property == config->prop_mode_id) {
459 struct drm_property_blob *mode =
460 drm_property_lookup_blob(dev, val);
461 ret = drm_atomic_set_mode_prop_for_crtc(state, mode);
462 drm_property_unreference_blob(mode);
463 return ret;
464 } else if (property == config->degamma_lut_property) {
465 ret = drm_atomic_replace_property_blob_from_id(crtc,
466 &state->degamma_lut,
467 val,
468 -1,
469 &replaced);
470 state->color_mgmt_changed = replaced;
471 return ret;
472 } else if (property == config->ctm_property) {
473 ret = drm_atomic_replace_property_blob_from_id(crtc,
474 &state->ctm,
475 val,
476 sizeof(struct drm_color_ctm),
477 &replaced);
478 state->color_mgmt_changed = replaced;
479 return ret;
480 } else if (property == config->gamma_lut_property) {
481 ret = drm_atomic_replace_property_blob_from_id(crtc,
482 &state->gamma_lut,
483 val,
484 -1,
485 &replaced);
486 state->color_mgmt_changed = replaced;
487 return ret;
488 } else if (crtc->funcs->atomic_set_property)
489 return crtc->funcs->atomic_set_property(crtc, state, property, val);
490 else
491 return -EINVAL;
492
493 return 0;
494}
495EXPORT_SYMBOL(drm_atomic_crtc_set_property);
496
497/**
498 * drm_atomic_crtc_get_property - get property value from CRTC state
499 * @crtc: the drm CRTC to set a property on
500 * @state: the state object to get the property value from
501 * @property: the property to set
502 * @val: return location for the property value
503 *
504 * This function handles generic/core properties and calls out to
505 * driver's ->atomic_get_property() for driver properties. To ensure
506 * consistent behavior you must call this function rather than the
507 * driver hook directly.
508 *
509 * RETURNS:
510 * Zero on success, error code on failure
511 */
512static int
513drm_atomic_crtc_get_property(struct drm_crtc *crtc,
514 const struct drm_crtc_state *state,
515 struct drm_property *property, uint64_t *val)
516{
517 struct drm_device *dev = crtc->dev;
518 struct drm_mode_config *config = &dev->mode_config;
519
520 if (property == config->prop_active)
521 *val = state->active;
522 else if (property == config->prop_mode_id)
523 *val = (state->mode_blob) ? state->mode_blob->base.id : 0;
524 else if (property == config->degamma_lut_property)
525 *val = (state->degamma_lut) ? state->degamma_lut->base.id : 0;
526 else if (property == config->ctm_property)
527 *val = (state->ctm) ? state->ctm->base.id : 0;
528 else if (property == config->gamma_lut_property)
529 *val = (state->gamma_lut) ? state->gamma_lut->base.id : 0;
530 else if (crtc->funcs->atomic_get_property)
531 return crtc->funcs->atomic_get_property(crtc, state, property, val);
532 else
533 return -EINVAL;
534
535 return 0;
536}
537
538/**
539 * drm_atomic_crtc_check - check crtc state
540 * @crtc: crtc to check
541 * @state: crtc state to check
542 *
543 * Provides core sanity checks for crtc state.
544 *
545 * RETURNS:
546 * Zero on success, error code on failure
547 */
548static int drm_atomic_crtc_check(struct drm_crtc *crtc,
549 struct drm_crtc_state *state)
550{
551 /* NOTE: we explicitly don't enforce constraints such as primary
552 * layer covering entire screen, since that is something we want
553 * to allow (on hw that supports it). For hw that does not, it
554 * should be checked in driver's crtc->atomic_check() vfunc.
555 *
556 * TODO: Add generic modeset state checks once we support those.
557 */
558
559 if (state->active && !state->enable) {
560 DRM_DEBUG_ATOMIC("[CRTC:%d:%s] active without enabled\n",
561 crtc->base.id, crtc->name);
562 return -EINVAL;
563 }
564
565 /* The state->enable vs. state->mode_blob checks can be WARN_ON,
566 * as this is a kernel-internal detail that userspace should never
567 * be able to trigger. */
568 if (drm_core_check_feature(crtc->dev, DRIVER_ATOMIC) &&
569 WARN_ON(state->enable && !state->mode_blob)) {
570 DRM_DEBUG_ATOMIC("[CRTC:%d:%s] enabled without mode blob\n",
571 crtc->base.id, crtc->name);
572 return -EINVAL;
573 }
574
575 if (drm_core_check_feature(crtc->dev, DRIVER_ATOMIC) &&
576 WARN_ON(!state->enable && state->mode_blob)) {
577 DRM_DEBUG_ATOMIC("[CRTC:%d:%s] disabled with mode blob\n",
578 crtc->base.id, crtc->name);
579 return -EINVAL;
580 }
581
582 /*
583 * Reject event generation for when a CRTC is off and stays off.
584 * It wouldn't be hard to implement this, but userspace has a track
585 * record of happily burning through 100% cpu (or worse, crash) when the
586 * display pipe is suspended. To avoid all that fun just reject updates
587 * that ask for events since likely that indicates a bug in the
588 * compositor's drawing loop. This is consistent with the vblank IOCTL
589 * and legacy page_flip IOCTL which also reject service on a disabled
590 * pipe.
591 */
592 if (state->event && !state->active && !crtc->state->active) {
593 DRM_DEBUG_ATOMIC("[CRTC:%d] requesting event but off\n",
594 crtc->base.id);
595 return -EINVAL;
596 }
597
598 return 0;
599}
600
601/**
602 * drm_atomic_get_plane_state - get plane state
603 * @state: global atomic state object
604 * @plane: plane to get state object for
605 *
606 * This function returns the plane state for the given plane, allocating it if
607 * needed. It will also grab the relevant plane lock to make sure that the state
608 * is consistent.
609 *
610 * Returns:
611 *
612 * Either the allocated state or the error code encoded into the pointer. When
613 * the error is EDEADLK then the w/w mutex code has detected a deadlock and the
614 * entire atomic sequence must be restarted. All other errors are fatal.
615 */
616struct drm_plane_state *
617drm_atomic_get_plane_state(struct drm_atomic_state *state,
618 struct drm_plane *plane)
619{
620 int ret, index = drm_plane_index(plane);
621 struct drm_plane_state *plane_state;
622
623 plane_state = drm_atomic_get_existing_plane_state(state, plane);
624 if (plane_state)
625 return plane_state;
626
627 ret = drm_modeset_lock(&plane->mutex, state->acquire_ctx);
628 if (ret)
629 return ERR_PTR(ret);
630
631 plane_state = plane->funcs->atomic_duplicate_state(plane);
632 if (!plane_state)
633 return ERR_PTR(-ENOMEM);
634
635 state->plane_states[index] = plane_state;
636 state->planes[index] = plane;
637 plane_state->state = state;
638
639 DRM_DEBUG_ATOMIC("Added [PLANE:%d:%s] %p state to %p\n",
640 plane->base.id, plane->name, plane_state, state);
641
642 if (plane_state->crtc) {
643 struct drm_crtc_state *crtc_state;
644
645 crtc_state = drm_atomic_get_crtc_state(state,
646 plane_state->crtc);
647 if (IS_ERR(crtc_state))
648 return ERR_CAST(crtc_state);
649 }
650
651 return plane_state;
652}
653EXPORT_SYMBOL(drm_atomic_get_plane_state);
654
655/**
656 * drm_atomic_plane_set_property - set property on plane
657 * @plane: the drm plane to set a property on
658 * @state: the state object to update with the new property value
659 * @property: the property to set
660 * @val: the new property value
661 *
662 * Use this instead of calling plane->atomic_set_property directly.
663 * This function handles generic/core properties and calls out to
664 * driver's ->atomic_set_property() for driver properties. To ensure
665 * consistent behavior you must call this function rather than the
666 * driver hook directly.
667 *
668 * RETURNS:
669 * Zero on success, error code on failure
670 */
671int drm_atomic_plane_set_property(struct drm_plane *plane,
672 struct drm_plane_state *state, struct drm_property *property,
673 uint64_t val)
674{
675 struct drm_device *dev = plane->dev;
676 struct drm_mode_config *config = &dev->mode_config;
677
678 if (property == config->prop_fb_id) {
679 struct drm_framebuffer *fb = drm_framebuffer_lookup(dev, val);
680 drm_atomic_set_fb_for_plane(state, fb);
681 if (fb)
682 drm_framebuffer_unreference(fb);
683 } else if (property == config->prop_crtc_id) {
684 struct drm_crtc *crtc = drm_crtc_find(dev, val);
685 return drm_atomic_set_crtc_for_plane(state, crtc);
686 } else if (property == config->prop_crtc_x) {
687 state->crtc_x = U642I64(val);
688 } else if (property == config->prop_crtc_y) {
689 state->crtc_y = U642I64(val);
690 } else if (property == config->prop_crtc_w) {
691 state->crtc_w = val;
692 } else if (property == config->prop_crtc_h) {
693 state->crtc_h = val;
694 } else if (property == config->prop_src_x) {
695 state->src_x = val;
696 } else if (property == config->prop_src_y) {
697 state->src_y = val;
698 } else if (property == config->prop_src_w) {
699 state->src_w = val;
700 } else if (property == config->prop_src_h) {
701 state->src_h = val;
702 } else if (property == config->rotation_property) {
703 state->rotation = val;
704 } else if (plane->funcs->atomic_set_property) {
705 return plane->funcs->atomic_set_property(plane, state,
706 property, val);
707 } else {
708 return -EINVAL;
709 }
710
711 return 0;
712}
713EXPORT_SYMBOL(drm_atomic_plane_set_property);
714
715/**
716 * drm_atomic_plane_get_property - get property value from plane state
717 * @plane: the drm plane to set a property on
718 * @state: the state object to get the property value from
719 * @property: the property to set
720 * @val: return location for the property value
721 *
722 * This function handles generic/core properties and calls out to
723 * driver's ->atomic_get_property() for driver properties. To ensure
724 * consistent behavior you must call this function rather than the
725 * driver hook directly.
726 *
727 * RETURNS:
728 * Zero on success, error code on failure
729 */
730static int
731drm_atomic_plane_get_property(struct drm_plane *plane,
732 const struct drm_plane_state *state,
733 struct drm_property *property, uint64_t *val)
734{
735 struct drm_device *dev = plane->dev;
736 struct drm_mode_config *config = &dev->mode_config;
737
738 if (property == config->prop_fb_id) {
739 *val = (state->fb) ? state->fb->base.id : 0;
740 } else if (property == config->prop_crtc_id) {
741 *val = (state->crtc) ? state->crtc->base.id : 0;
742 } else if (property == config->prop_crtc_x) {
743 *val = I642U64(state->crtc_x);
744 } else if (property == config->prop_crtc_y) {
745 *val = I642U64(state->crtc_y);
746 } else if (property == config->prop_crtc_w) {
747 *val = state->crtc_w;
748 } else if (property == config->prop_crtc_h) {
749 *val = state->crtc_h;
750 } else if (property == config->prop_src_x) {
751 *val = state->src_x;
752 } else if (property == config->prop_src_y) {
753 *val = state->src_y;
754 } else if (property == config->prop_src_w) {
755 *val = state->src_w;
756 } else if (property == config->prop_src_h) {
757 *val = state->src_h;
758 } else if (property == config->rotation_property) {
759 *val = state->rotation;
760 } else if (plane->funcs->atomic_get_property) {
761 return plane->funcs->atomic_get_property(plane, state, property, val);
762 } else {
763 return -EINVAL;
764 }
765
766 return 0;
767}
768
769static bool
770plane_switching_crtc(struct drm_atomic_state *state,
771 struct drm_plane *plane,
772 struct drm_plane_state *plane_state)
773{
774 if (!plane->state->crtc || !plane_state->crtc)
775 return false;
776
777 if (plane->state->crtc == plane_state->crtc)
778 return false;
779
780 /* This could be refined, but currently there's no helper or driver code
781 * to implement direct switching of active planes nor userspace to take
782 * advantage of more direct plane switching without the intermediate
783 * full OFF state.
784 */
785 return true;
786}
787
788/**
789 * drm_atomic_plane_check - check plane state
790 * @plane: plane to check
791 * @state: plane state to check
792 *
793 * Provides core sanity checks for plane state.
794 *
795 * RETURNS:
796 * Zero on success, error code on failure
797 */
798static int drm_atomic_plane_check(struct drm_plane *plane,
799 struct drm_plane_state *state)
800{
801 unsigned int fb_width, fb_height;
802 int ret;
803
804 /* either *both* CRTC and FB must be set, or neither */
805 if (WARN_ON(state->crtc && !state->fb)) {
806 DRM_DEBUG_ATOMIC("CRTC set but no FB\n");
807 return -EINVAL;
808 } else if (WARN_ON(state->fb && !state->crtc)) {
809 DRM_DEBUG_ATOMIC("FB set but no CRTC\n");
810 return -EINVAL;
811 }
812
813 /* if disabled, we don't care about the rest of the state: */
814 if (!state->crtc)
815 return 0;
816
817 /* Check whether this plane is usable on this CRTC */
818 if (!(plane->possible_crtcs & drm_crtc_mask(state->crtc))) {
819 DRM_DEBUG_ATOMIC("Invalid crtc for plane\n");
820 return -EINVAL;
821 }
822
823 /* Check whether this plane supports the fb pixel format. */
824 ret = drm_plane_check_pixel_format(plane, state->fb->pixel_format);
825 if (ret) {
826 DRM_DEBUG_ATOMIC("Invalid pixel format %s\n",
827 drm_get_format_name(state->fb->pixel_format));
828 return ret;
829 }
830
831 /* Give drivers some help against integer overflows */
832 if (state->crtc_w > INT_MAX ||
833 state->crtc_x > INT_MAX - (int32_t) state->crtc_w ||
834 state->crtc_h > INT_MAX ||
835 state->crtc_y > INT_MAX - (int32_t) state->crtc_h) {
836 DRM_DEBUG_ATOMIC("Invalid CRTC coordinates %ux%u+%d+%d\n",
837 state->crtc_w, state->crtc_h,
838 state->crtc_x, state->crtc_y);
839 return -ERANGE;
840 }
841
842 fb_width = state->fb->width << 16;
843 fb_height = state->fb->height << 16;
844
845 /* Make sure source coordinates are inside the fb. */
846 if (state->src_w > fb_width ||
847 state->src_x > fb_width - state->src_w ||
848 state->src_h > fb_height ||
849 state->src_y > fb_height - state->src_h) {
850 DRM_DEBUG_ATOMIC("Invalid source coordinates "
851 "%u.%06ux%u.%06u+%u.%06u+%u.%06u\n",
852 state->src_w >> 16, ((state->src_w & 0xffff) * 15625) >> 10,
853 state->src_h >> 16, ((state->src_h & 0xffff) * 15625) >> 10,
854 state->src_x >> 16, ((state->src_x & 0xffff) * 15625) >> 10,
855 state->src_y >> 16, ((state->src_y & 0xffff) * 15625) >> 10);
856 return -ENOSPC;
857 }
858
859 if (plane_switching_crtc(state->state, plane, state)) {
860 DRM_DEBUG_ATOMIC("[PLANE:%d:%s] switching CRTC directly\n",
861 plane->base.id, plane->name);
862 return -EINVAL;
863 }
864
865 return 0;
866}
867
868/**
869 * drm_atomic_get_connector_state - get connector state
870 * @state: global atomic state object
871 * @connector: connector to get state object for
872 *
873 * This function returns the connector state for the given connector,
874 * allocating it if needed. It will also grab the relevant connector lock to
875 * make sure that the state is consistent.
876 *
877 * Returns:
878 *
879 * Either the allocated state or the error code encoded into the pointer. When
880 * the error is EDEADLK then the w/w mutex code has detected a deadlock and the
881 * entire atomic sequence must be restarted. All other errors are fatal.
882 */
883struct drm_connector_state *
884drm_atomic_get_connector_state(struct drm_atomic_state *state,
885 struct drm_connector *connector)
886{
887 int ret, index;
888 struct drm_mode_config *config = &connector->dev->mode_config;
889 struct drm_connector_state *connector_state;
890
891 ret = drm_modeset_lock(&config->connection_mutex, state->acquire_ctx);
892 if (ret)
893 return ERR_PTR(ret);
894
895 index = drm_connector_index(connector);
896
897 if (index >= state->num_connector) {
898 struct drm_connector **c;
899 struct drm_connector_state **cs;
900 int alloc = max(index + 1, config->num_connector);
901
902 c = krealloc(state->connectors, alloc * sizeof(*state->connectors), GFP_KERNEL);
903 if (!c)
904 return ERR_PTR(-ENOMEM);
905
906 state->connectors = c;
907 memset(&state->connectors[state->num_connector], 0,
908 sizeof(*state->connectors) * (alloc - state->num_connector));
909
910 cs = krealloc(state->connector_states, alloc * sizeof(*state->connector_states), GFP_KERNEL);
911 if (!cs)
912 return ERR_PTR(-ENOMEM);
913
914 state->connector_states = cs;
915 memset(&state->connector_states[state->num_connector], 0,
916 sizeof(*state->connector_states) * (alloc - state->num_connector));
917 state->num_connector = alloc;
918 }
919
920 if (state->connector_states[index])
921 return state->connector_states[index];
922
923 connector_state = connector->funcs->atomic_duplicate_state(connector);
924 if (!connector_state)
925 return ERR_PTR(-ENOMEM);
926
927 state->connector_states[index] = connector_state;
928 state->connectors[index] = connector;
929 connector_state->state = state;
930
931 DRM_DEBUG_ATOMIC("Added [CONNECTOR:%d] %p state to %p\n",
932 connector->base.id, connector_state, state);
933
934 if (connector_state->crtc) {
935 struct drm_crtc_state *crtc_state;
936
937 crtc_state = drm_atomic_get_crtc_state(state,
938 connector_state->crtc);
939 if (IS_ERR(crtc_state))
940 return ERR_CAST(crtc_state);
941 }
942
943 return connector_state;
944}
945EXPORT_SYMBOL(drm_atomic_get_connector_state);
946
947/**
948 * drm_atomic_connector_set_property - set property on connector.
949 * @connector: the drm connector to set a property on
950 * @state: the state object to update with the new property value
951 * @property: the property to set
952 * @val: the new property value
953 *
954 * Use this instead of calling connector->atomic_set_property directly.
955 * This function handles generic/core properties and calls out to
956 * driver's ->atomic_set_property() for driver properties. To ensure
957 * consistent behavior you must call this function rather than the
958 * driver hook directly.
959 *
960 * RETURNS:
961 * Zero on success, error code on failure
962 */
963int drm_atomic_connector_set_property(struct drm_connector *connector,
964 struct drm_connector_state *state, struct drm_property *property,
965 uint64_t val)
966{
967 struct drm_device *dev = connector->dev;
968 struct drm_mode_config *config = &dev->mode_config;
969
970 if (property == config->prop_crtc_id) {
971 struct drm_crtc *crtc = drm_crtc_find(dev, val);
972 return drm_atomic_set_crtc_for_connector(state, crtc);
973 } else if (property == config->dpms_property) {
974 /* setting DPMS property requires special handling, which
975 * is done in legacy setprop path for us. Disallow (for
976 * now?) atomic writes to DPMS property:
977 */
978 return -EINVAL;
979 } else if (connector->funcs->atomic_set_property) {
980 return connector->funcs->atomic_set_property(connector,
981 state, property, val);
982 } else {
983 return -EINVAL;
984 }
985}
986EXPORT_SYMBOL(drm_atomic_connector_set_property);
987
988/**
989 * drm_atomic_connector_get_property - get property value from connector state
990 * @connector: the drm connector to set a property on
991 * @state: the state object to get the property value from
992 * @property: the property to set
993 * @val: return location for the property value
994 *
995 * This function handles generic/core properties and calls out to
996 * driver's ->atomic_get_property() for driver properties. To ensure
997 * consistent behavior you must call this function rather than the
998 * driver hook directly.
999 *
1000 * RETURNS:
1001 * Zero on success, error code on failure
1002 */
1003static int
1004drm_atomic_connector_get_property(struct drm_connector *connector,
1005 const struct drm_connector_state *state,
1006 struct drm_property *property, uint64_t *val)
1007{
1008 struct drm_device *dev = connector->dev;
1009 struct drm_mode_config *config = &dev->mode_config;
1010
1011 if (property == config->prop_crtc_id) {
1012 *val = (state->crtc) ? state->crtc->base.id : 0;
1013 } else if (property == config->dpms_property) {
1014 *val = connector->dpms;
1015 } else if (connector->funcs->atomic_get_property) {
1016 return connector->funcs->atomic_get_property(connector,
1017 state, property, val);
1018 } else {
1019 return -EINVAL;
1020 }
1021
1022 return 0;
1023}
1024
1025int drm_atomic_get_property(struct drm_mode_object *obj,
1026 struct drm_property *property, uint64_t *val)
1027{
1028 struct drm_device *dev = property->dev;
1029 int ret;
1030
1031 switch (obj->type) {
1032 case DRM_MODE_OBJECT_CONNECTOR: {
1033 struct drm_connector *connector = obj_to_connector(obj);
1034 WARN_ON(!drm_modeset_is_locked(&dev->mode_config.connection_mutex));
1035 ret = drm_atomic_connector_get_property(connector,
1036 connector->state, property, val);
1037 break;
1038 }
1039 case DRM_MODE_OBJECT_CRTC: {
1040 struct drm_crtc *crtc = obj_to_crtc(obj);
1041 WARN_ON(!drm_modeset_is_locked(&crtc->mutex));
1042 ret = drm_atomic_crtc_get_property(crtc,
1043 crtc->state, property, val);
1044 break;
1045 }
1046 case DRM_MODE_OBJECT_PLANE: {
1047 struct drm_plane *plane = obj_to_plane(obj);
1048 WARN_ON(!drm_modeset_is_locked(&plane->mutex));
1049 ret = drm_atomic_plane_get_property(plane,
1050 plane->state, property, val);
1051 break;
1052 }
1053 default:
1054 ret = -EINVAL;
1055 break;
1056 }
1057
1058 return ret;
1059}
1060
1061/**
1062 * drm_atomic_set_crtc_for_plane - set crtc for plane
1063 * @plane_state: the plane whose incoming state to update
1064 * @crtc: crtc to use for the plane
1065 *
1066 * Changing the assigned crtc for a plane requires us to grab the lock and state
1067 * for the new crtc, as needed. This function takes care of all these details
1068 * besides updating the pointer in the state object itself.
1069 *
1070 * Returns:
1071 * 0 on success or can fail with -EDEADLK or -ENOMEM. When the error is EDEADLK
1072 * then the w/w mutex code has detected a deadlock and the entire atomic
1073 * sequence must be restarted. All other errors are fatal.
1074 */
1075int
1076drm_atomic_set_crtc_for_plane(struct drm_plane_state *plane_state,
1077 struct drm_crtc *crtc)
1078{
1079 struct drm_plane *plane = plane_state->plane;
1080 struct drm_crtc_state *crtc_state;
1081
1082 if (plane_state->crtc) {
1083 crtc_state = drm_atomic_get_crtc_state(plane_state->state,
1084 plane_state->crtc);
1085 if (WARN_ON(IS_ERR(crtc_state)))
1086 return PTR_ERR(crtc_state);
1087
1088 crtc_state->plane_mask &= ~(1 << drm_plane_index(plane));
1089 }
1090
1091 plane_state->crtc = crtc;
1092
1093 if (crtc) {
1094 crtc_state = drm_atomic_get_crtc_state(plane_state->state,
1095 crtc);
1096 if (IS_ERR(crtc_state))
1097 return PTR_ERR(crtc_state);
1098 crtc_state->plane_mask |= (1 << drm_plane_index(plane));
1099 }
1100
1101 if (crtc)
1102 DRM_DEBUG_ATOMIC("Link plane state %p to [CRTC:%d:%s]\n",
1103 plane_state, crtc->base.id, crtc->name);
1104 else
1105 DRM_DEBUG_ATOMIC("Link plane state %p to [NOCRTC]\n",
1106 plane_state);
1107
1108 return 0;
1109}
1110EXPORT_SYMBOL(drm_atomic_set_crtc_for_plane);
1111
1112/**
1113 * drm_atomic_set_fb_for_plane - set framebuffer for plane
1114 * @plane_state: atomic state object for the plane
1115 * @fb: fb to use for the plane
1116 *
1117 * Changing the assigned framebuffer for a plane requires us to grab a reference
1118 * to the new fb and drop the reference to the old fb, if there is one. This
1119 * function takes care of all these details besides updating the pointer in the
1120 * state object itself.
1121 */
1122void
1123drm_atomic_set_fb_for_plane(struct drm_plane_state *plane_state,
1124 struct drm_framebuffer *fb)
1125{
1126 if (plane_state->fb)
1127 drm_framebuffer_unreference(plane_state->fb);
1128 if (fb)
1129 drm_framebuffer_reference(fb);
1130 plane_state->fb = fb;
1131
1132 if (fb)
1133 DRM_DEBUG_ATOMIC("Set [FB:%d] for plane state %p\n",
1134 fb->base.id, plane_state);
1135 else
1136 DRM_DEBUG_ATOMIC("Set [NOFB] for plane state %p\n",
1137 plane_state);
1138}
1139EXPORT_SYMBOL(drm_atomic_set_fb_for_plane);
1140
1141/**
1142 * drm_atomic_set_crtc_for_connector - set crtc for connector
1143 * @conn_state: atomic state object for the connector
1144 * @crtc: crtc to use for the connector
1145 *
1146 * Changing the assigned crtc for a connector requires us to grab the lock and
1147 * state for the new crtc, as needed. This function takes care of all these
1148 * details besides updating the pointer in the state object itself.
1149 *
1150 * Returns:
1151 * 0 on success or can fail with -EDEADLK or -ENOMEM. When the error is EDEADLK
1152 * then the w/w mutex code has detected a deadlock and the entire atomic
1153 * sequence must be restarted. All other errors are fatal.
1154 */
1155int
1156drm_atomic_set_crtc_for_connector(struct drm_connector_state *conn_state,
1157 struct drm_crtc *crtc)
1158{
1159 struct drm_crtc_state *crtc_state;
1160
1161 if (conn_state->crtc && conn_state->crtc != crtc) {
1162 crtc_state = drm_atomic_get_existing_crtc_state(conn_state->state,
1163 conn_state->crtc);
1164
1165 crtc_state->connector_mask &=
1166 ~(1 << drm_connector_index(conn_state->connector));
1167 }
1168
1169 if (crtc) {
1170 crtc_state = drm_atomic_get_crtc_state(conn_state->state, crtc);
1171 if (IS_ERR(crtc_state))
1172 return PTR_ERR(crtc_state);
1173
1174 crtc_state->connector_mask |=
1175 1 << drm_connector_index(conn_state->connector);
1176 }
1177
1178 conn_state->crtc = crtc;
1179
1180 if (crtc)
1181 DRM_DEBUG_ATOMIC("Link connector state %p to [CRTC:%d:%s]\n",
1182 conn_state, crtc->base.id, crtc->name);
1183 else
1184 DRM_DEBUG_ATOMIC("Link connector state %p to [NOCRTC]\n",
1185 conn_state);
1186
1187 return 0;
1188}
1189EXPORT_SYMBOL(drm_atomic_set_crtc_for_connector);
1190
1191/**
1192 * drm_atomic_add_affected_connectors - add connectors for crtc
1193 * @state: atomic state
1194 * @crtc: DRM crtc
1195 *
1196 * This function walks the current configuration and adds all connectors
1197 * currently using @crtc to the atomic configuration @state. Note that this
1198 * function must acquire the connection mutex. This can potentially cause
1199 * unneeded seralization if the update is just for the planes on one crtc. Hence
1200 * drivers and helpers should only call this when really needed (e.g. when a
1201 * full modeset needs to happen due to some change).
1202 *
1203 * Returns:
1204 * 0 on success or can fail with -EDEADLK or -ENOMEM. When the error is EDEADLK
1205 * then the w/w mutex code has detected a deadlock and the entire atomic
1206 * sequence must be restarted. All other errors are fatal.
1207 */
1208int
1209drm_atomic_add_affected_connectors(struct drm_atomic_state *state,
1210 struct drm_crtc *crtc)
1211{
1212 struct drm_mode_config *config = &state->dev->mode_config;
1213 struct drm_connector *connector;
1214 struct drm_connector_state *conn_state;
1215 int ret;
1216
1217 ret = drm_modeset_lock(&config->connection_mutex, state->acquire_ctx);
1218 if (ret)
1219 return ret;
1220
1221 DRM_DEBUG_ATOMIC("Adding all current connectors for [CRTC:%d:%s] to %p\n",
1222 crtc->base.id, crtc->name, state);
1223
1224 /*
1225 * Changed connectors are already in @state, so only need to look at the
1226 * current configuration.
1227 */
1228 drm_for_each_connector(connector, state->dev) {
1229 if (connector->state->crtc != crtc)
1230 continue;
1231
1232 conn_state = drm_atomic_get_connector_state(state, connector);
1233 if (IS_ERR(conn_state))
1234 return PTR_ERR(conn_state);
1235 }
1236
1237 return 0;
1238}
1239EXPORT_SYMBOL(drm_atomic_add_affected_connectors);
1240
1241/**
1242 * drm_atomic_add_affected_planes - add planes for crtc
1243 * @state: atomic state
1244 * @crtc: DRM crtc
1245 *
1246 * This function walks the current configuration and adds all planes
1247 * currently used by @crtc to the atomic configuration @state. This is useful
1248 * when an atomic commit also needs to check all currently enabled plane on
1249 * @crtc, e.g. when changing the mode. It's also useful when re-enabling a CRTC
1250 * to avoid special code to force-enable all planes.
1251 *
1252 * Since acquiring a plane state will always also acquire the w/w mutex of the
1253 * current CRTC for that plane (if there is any) adding all the plane states for
1254 * a CRTC will not reduce parallism of atomic updates.
1255 *
1256 * Returns:
1257 * 0 on success or can fail with -EDEADLK or -ENOMEM. When the error is EDEADLK
1258 * then the w/w mutex code has detected a deadlock and the entire atomic
1259 * sequence must be restarted. All other errors are fatal.
1260 */
1261int
1262drm_atomic_add_affected_planes(struct drm_atomic_state *state,
1263 struct drm_crtc *crtc)
1264{
1265 struct drm_plane *plane;
1266
1267 WARN_ON(!drm_atomic_get_existing_crtc_state(state, crtc));
1268
1269 drm_for_each_plane_mask(plane, state->dev, crtc->state->plane_mask) {
1270 struct drm_plane_state *plane_state =
1271 drm_atomic_get_plane_state(state, plane);
1272
1273 if (IS_ERR(plane_state))
1274 return PTR_ERR(plane_state);
1275 }
1276 return 0;
1277}
1278EXPORT_SYMBOL(drm_atomic_add_affected_planes);
1279
1280/**
1281 * drm_atomic_legacy_backoff - locking backoff for legacy ioctls
1282 * @state: atomic state
1283 *
1284 * This function should be used by legacy entry points which don't understand
1285 * -EDEADLK semantics. For simplicity this one will grab all modeset locks after
1286 * the slowpath completed.
1287 */
1288void drm_atomic_legacy_backoff(struct drm_atomic_state *state)
1289{
1290 int ret;
1291
1292retry:
1293 drm_modeset_backoff(state->acquire_ctx);
1294
1295 ret = drm_modeset_lock_all_ctx(state->dev, state->acquire_ctx);
1296 if (ret)
1297 goto retry;
1298}
1299EXPORT_SYMBOL(drm_atomic_legacy_backoff);
1300
1301/**
1302 * drm_atomic_check_only - check whether a given config would work
1303 * @state: atomic configuration to check
1304 *
1305 * Note that this function can return -EDEADLK if the driver needed to acquire
1306 * more locks but encountered a deadlock. The caller must then do the usual w/w
1307 * backoff dance and restart. All other errors are fatal.
1308 *
1309 * Returns:
1310 * 0 on success, negative error code on failure.
1311 */
1312int drm_atomic_check_only(struct drm_atomic_state *state)
1313{
1314 struct drm_device *dev = state->dev;
1315 struct drm_mode_config *config = &dev->mode_config;
1316 struct drm_plane *plane;
1317 struct drm_plane_state *plane_state;
1318 struct drm_crtc *crtc;
1319 struct drm_crtc_state *crtc_state;
1320 int i, ret = 0;
1321
1322 DRM_DEBUG_ATOMIC("checking %p\n", state);
1323
1324 for_each_plane_in_state(state, plane, plane_state, i) {
1325 ret = drm_atomic_plane_check(plane, plane_state);
1326 if (ret) {
1327 DRM_DEBUG_ATOMIC("[PLANE:%d:%s] atomic core check failed\n",
1328 plane->base.id, plane->name);
1329 return ret;
1330 }
1331 }
1332
1333 for_each_crtc_in_state(state, crtc, crtc_state, i) {
1334 ret = drm_atomic_crtc_check(crtc, crtc_state);
1335 if (ret) {
1336 DRM_DEBUG_ATOMIC("[CRTC:%d:%s] atomic core check failed\n",
1337 crtc->base.id, crtc->name);
1338 return ret;
1339 }
1340 }
1341
1342 if (config->funcs->atomic_check)
1343 ret = config->funcs->atomic_check(state->dev, state);
1344
1345 if (!state->allow_modeset) {
1346 for_each_crtc_in_state(state, crtc, crtc_state, i) {
1347 if (drm_atomic_crtc_needs_modeset(crtc_state)) {
1348 DRM_DEBUG_ATOMIC("[CRTC:%d:%s] requires full modeset\n",
1349 crtc->base.id, crtc->name);
1350 return -EINVAL;
1351 }
1352 }
1353 }
1354
1355 return ret;
1356}
1357EXPORT_SYMBOL(drm_atomic_check_only);
1358
1359/**
1360 * drm_atomic_commit - commit configuration atomically
1361 * @state: atomic configuration to check
1362 *
1363 * Note that this function can return -EDEADLK if the driver needed to acquire
1364 * more locks but encountered a deadlock. The caller must then do the usual w/w
1365 * backoff dance and restart. All other errors are fatal.
1366 *
1367 * Also note that on successful execution ownership of @state is transferred
1368 * from the caller of this function to the function itself. The caller must not
1369 * free or in any other way access @state. If the function fails then the caller
1370 * must clean up @state itself.
1371 *
1372 * Returns:
1373 * 0 on success, negative error code on failure.
1374 */
1375int drm_atomic_commit(struct drm_atomic_state *state)
1376{
1377 struct drm_mode_config *config = &state->dev->mode_config;
1378 int ret;
1379
1380 ret = drm_atomic_check_only(state);
1381 if (ret)
1382 return ret;
1383
1384 DRM_DEBUG_ATOMIC("commiting %p\n", state);
1385
1386 return config->funcs->atomic_commit(state->dev, state, false);
1387}
1388EXPORT_SYMBOL(drm_atomic_commit);
1389
1390/**
1391 * drm_atomic_async_commit - atomic&async configuration commit
1392 * @state: atomic configuration to check
1393 *
1394 * Note that this function can return -EDEADLK if the driver needed to acquire
1395 * more locks but encountered a deadlock. The caller must then do the usual w/w
1396 * backoff dance and restart. All other errors are fatal.
1397 *
1398 * Also note that on successful execution ownership of @state is transferred
1399 * from the caller of this function to the function itself. The caller must not
1400 * free or in any other way access @state. If the function fails then the caller
1401 * must clean up @state itself.
1402 *
1403 * Returns:
1404 * 0 on success, negative error code on failure.
1405 */
1406int drm_atomic_async_commit(struct drm_atomic_state *state)
1407{
1408 struct drm_mode_config *config = &state->dev->mode_config;
1409 int ret;
1410
1411 ret = drm_atomic_check_only(state);
1412 if (ret)
1413 return ret;
1414
1415 DRM_DEBUG_ATOMIC("commiting %p asynchronously\n", state);
1416
1417 return config->funcs->atomic_commit(state->dev, state, true);
1418}
1419EXPORT_SYMBOL(drm_atomic_async_commit);
1420
1421/*
1422 * The big monstor ioctl
1423 */
1424
1425static struct drm_pending_vblank_event *create_vblank_event(
1426 struct drm_device *dev, struct drm_file *file_priv, uint64_t user_data)
1427{
1428 struct drm_pending_vblank_event *e = NULL;
1429 int ret;
1430
1431 e = kzalloc(sizeof *e, GFP_KERNEL);
1432 if (!e)
1433 return NULL;
1434
1435 e->event.base.type = DRM_EVENT_FLIP_COMPLETE;
1436 e->event.base.length = sizeof(e->event);
1437 e->event.user_data = user_data;
1438
1439 ret = drm_event_reserve_init(dev, file_priv, &e->base, &e->event.base);
1440 if (ret) {
1441 kfree(e);
1442 return NULL;
1443 }
1444
1445 return e;
1446}
1447
1448static int atomic_set_prop(struct drm_atomic_state *state,
1449 struct drm_mode_object *obj, struct drm_property *prop,
1450 uint64_t prop_value)
1451{
1452 struct drm_mode_object *ref;
1453 int ret;
1454
1455 if (!drm_property_change_valid_get(prop, prop_value, &ref))
1456 return -EINVAL;
1457
1458 switch (obj->type) {
1459 case DRM_MODE_OBJECT_CONNECTOR: {
1460 struct drm_connector *connector = obj_to_connector(obj);
1461 struct drm_connector_state *connector_state;
1462
1463 connector_state = drm_atomic_get_connector_state(state, connector);
1464 if (IS_ERR(connector_state)) {
1465 ret = PTR_ERR(connector_state);
1466 break;
1467 }
1468
1469 ret = drm_atomic_connector_set_property(connector,
1470 connector_state, prop, prop_value);
1471 break;
1472 }
1473 case DRM_MODE_OBJECT_CRTC: {
1474 struct drm_crtc *crtc = obj_to_crtc(obj);
1475 struct drm_crtc_state *crtc_state;
1476
1477 crtc_state = drm_atomic_get_crtc_state(state, crtc);
1478 if (IS_ERR(crtc_state)) {
1479 ret = PTR_ERR(crtc_state);
1480 break;
1481 }
1482
1483 ret = drm_atomic_crtc_set_property(crtc,
1484 crtc_state, prop, prop_value);
1485 break;
1486 }
1487 case DRM_MODE_OBJECT_PLANE: {
1488 struct drm_plane *plane = obj_to_plane(obj);
1489 struct drm_plane_state *plane_state;
1490
1491 plane_state = drm_atomic_get_plane_state(state, plane);
1492 if (IS_ERR(plane_state)) {
1493 ret = PTR_ERR(plane_state);
1494 break;
1495 }
1496
1497 ret = drm_atomic_plane_set_property(plane,
1498 plane_state, prop, prop_value);
1499 break;
1500 }
1501 default:
1502 ret = -EINVAL;
1503 break;
1504 }
1505
1506 drm_property_change_valid_put(prop, ref);
1507 return ret;
1508}
1509
1510/**
1511 * drm_atomic_clean_old_fb -- Unset old_fb pointers and set plane->fb pointers.
1512 *
1513 * @dev: drm device to check.
1514 * @plane_mask: plane mask for planes that were updated.
1515 * @ret: return value, can be -EDEADLK for a retry.
1516 *
1517 * Before doing an update plane->old_fb is set to plane->fb,
1518 * but before dropping the locks old_fb needs to be set to NULL
1519 * and plane->fb updated. This is a common operation for each
1520 * atomic update, so this call is split off as a helper.
1521 */
1522void drm_atomic_clean_old_fb(struct drm_device *dev,
1523 unsigned plane_mask,
1524 int ret)
1525{
1526 struct drm_plane *plane;
1527
1528 /* if succeeded, fixup legacy plane crtc/fb ptrs before dropping
1529 * locks (ie. while it is still safe to deref plane->state). We
1530 * need to do this here because the driver entry points cannot
1531 * distinguish between legacy and atomic ioctls.
1532 */
1533 drm_for_each_plane_mask(plane, dev, plane_mask) {
1534 if (ret == 0) {
1535 struct drm_framebuffer *new_fb = plane->state->fb;
1536 if (new_fb)
1537 drm_framebuffer_reference(new_fb);
1538 plane->fb = new_fb;
1539 plane->crtc = plane->state->crtc;
1540
1541 if (plane->old_fb)
1542 drm_framebuffer_unreference(plane->old_fb);
1543 }
1544 plane->old_fb = NULL;
1545 }
1546}
1547EXPORT_SYMBOL(drm_atomic_clean_old_fb);
1548
1549int drm_mode_atomic_ioctl(struct drm_device *dev,
1550 void *data, struct drm_file *file_priv)
1551{
1552 struct drm_mode_atomic *arg = data;
1553 uint32_t __user *objs_ptr = (uint32_t __user *)(unsigned long)(arg->objs_ptr);
1554 uint32_t __user *count_props_ptr = (uint32_t __user *)(unsigned long)(arg->count_props_ptr);
1555 uint32_t __user *props_ptr = (uint32_t __user *)(unsigned long)(arg->props_ptr);
1556 uint64_t __user *prop_values_ptr = (uint64_t __user *)(unsigned long)(arg->prop_values_ptr);
1557 unsigned int copied_objs, copied_props;
1558 struct drm_atomic_state *state;
1559 struct drm_modeset_acquire_ctx ctx;
1560 struct drm_plane *plane;
1561 struct drm_crtc *crtc;
1562 struct drm_crtc_state *crtc_state;
1563 unsigned plane_mask;
1564 int ret = 0;
1565 unsigned int i, j;
1566
1567 /* disallow for drivers not supporting atomic: */
1568 if (!drm_core_check_feature(dev, DRIVER_ATOMIC))
1569 return -EINVAL;
1570
1571 /* disallow for userspace that has not enabled atomic cap (even
1572 * though this may be a bit overkill, since legacy userspace
1573 * wouldn't know how to call this ioctl)
1574 */
1575 if (!file_priv->atomic)
1576 return -EINVAL;
1577
1578 if (arg->flags & ~DRM_MODE_ATOMIC_FLAGS)
1579 return -EINVAL;
1580
1581 if (arg->reserved)
1582 return -EINVAL;
1583
1584 if ((arg->flags & DRM_MODE_PAGE_FLIP_ASYNC) &&
1585 !dev->mode_config.async_page_flip)
1586 return -EINVAL;
1587
1588 /* can't test and expect an event at the same time. */
1589 if ((arg->flags & DRM_MODE_ATOMIC_TEST_ONLY) &&
1590 (arg->flags & DRM_MODE_PAGE_FLIP_EVENT))
1591 return -EINVAL;
1592
1593 drm_modeset_acquire_init(&ctx, 0);
1594
1595 state = drm_atomic_state_alloc(dev);
1596 if (!state)
1597 return -ENOMEM;
1598
1599 state->acquire_ctx = &ctx;
1600 state->allow_modeset = !!(arg->flags & DRM_MODE_ATOMIC_ALLOW_MODESET);
1601
1602retry:
1603 plane_mask = 0;
1604 copied_objs = 0;
1605 copied_props = 0;
1606
1607 for (i = 0; i < arg->count_objs; i++) {
1608 uint32_t obj_id, count_props;
1609 struct drm_mode_object *obj;
1610
1611 if (get_user(obj_id, objs_ptr + copied_objs)) {
1612 ret = -EFAULT;
1613 goto out;
1614 }
1615
1616 obj = drm_mode_object_find(dev, obj_id, DRM_MODE_OBJECT_ANY);
1617 if (!obj || !obj->properties) {
1618 ret = -ENOENT;
1619 goto out;
1620 }
1621
1622 if (get_user(count_props, count_props_ptr + copied_objs)) {
1623 ret = -EFAULT;
1624 goto out;
1625 }
1626
1627 copied_objs++;
1628
1629 for (j = 0; j < count_props; j++) {
1630 uint32_t prop_id;
1631 uint64_t prop_value;
1632 struct drm_property *prop;
1633
1634 if (get_user(prop_id, props_ptr + copied_props)) {
1635 ret = -EFAULT;
1636 goto out;
1637 }
1638
1639 prop = drm_property_find(dev, prop_id);
1640 if (!prop) {
1641 ret = -ENOENT;
1642 goto out;
1643 }
1644
1645 if (copy_from_user(&prop_value,
1646 prop_values_ptr + copied_props,
1647 sizeof(prop_value))) {
1648 ret = -EFAULT;
1649 goto out;
1650 }
1651
1652 ret = atomic_set_prop(state, obj, prop, prop_value);
1653 if (ret)
1654 goto out;
1655
1656 copied_props++;
1657 }
1658
1659 if (obj->type == DRM_MODE_OBJECT_PLANE && count_props &&
1660 !(arg->flags & DRM_MODE_ATOMIC_TEST_ONLY)) {
1661 plane = obj_to_plane(obj);
1662 plane_mask |= (1 << drm_plane_index(plane));
1663 plane->old_fb = plane->fb;
1664 }
1665 }
1666
1667 if (arg->flags & DRM_MODE_PAGE_FLIP_EVENT) {
1668 for_each_crtc_in_state(state, crtc, crtc_state, i) {
1669 struct drm_pending_vblank_event *e;
1670
1671 e = create_vblank_event(dev, file_priv, arg->user_data);
1672 if (!e) {
1673 ret = -ENOMEM;
1674 goto out;
1675 }
1676
1677 crtc_state->event = e;
1678 }
1679 }
1680
1681 if (arg->flags & DRM_MODE_ATOMIC_TEST_ONLY) {
1682 /*
1683 * Unlike commit, check_only does not clean up state.
1684 * Below we call drm_atomic_state_free for it.
1685 */
1686 ret = drm_atomic_check_only(state);
1687 } else if (arg->flags & DRM_MODE_ATOMIC_NONBLOCK) {
1688 ret = drm_atomic_async_commit(state);
1689 } else {
1690 ret = drm_atomic_commit(state);
1691 }
1692
1693out:
1694 drm_atomic_clean_old_fb(dev, plane_mask, ret);
1695
1696 if (ret && arg->flags & DRM_MODE_PAGE_FLIP_EVENT) {
1697 /*
1698 * TEST_ONLY and PAGE_FLIP_EVENT are mutually exclusive,
1699 * if they weren't, this code should be called on success
1700 * for TEST_ONLY too.
1701 */
1702
1703 for_each_crtc_in_state(state, crtc, crtc_state, i) {
1704 if (!crtc_state->event)
1705 continue;
1706
1707 drm_event_cancel_free(dev, &crtc_state->event->base);
1708 }
1709 }
1710
1711 if (ret == -EDEADLK) {
1712 drm_atomic_state_clear(state);
1713 drm_modeset_backoff(&ctx);
1714 goto retry;
1715 }
1716
1717 if (ret || arg->flags & DRM_MODE_ATOMIC_TEST_ONLY)
1718 drm_atomic_state_free(state);
1719
1720 drm_modeset_drop_locks(&ctx);
1721 drm_modeset_acquire_fini(&ctx);
1722
1723 return ret;
1724}
1/*
2 * Copyright (C) 2014 Red Hat
3 * Copyright (C) 2014 Intel Corp.
4 * Copyright (c) 2020-2021, The Linux Foundation. All rights reserved.
5 *
6 * Permission is hereby granted, free of charge, to any person obtaining a
7 * copy of this software and associated documentation files (the "Software"),
8 * to deal in the Software without restriction, including without limitation
9 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
10 * and/or sell copies of the Software, and to permit persons to whom the
11 * Software is furnished to do so, subject to the following conditions:
12 *
13 * The above copyright notice and this permission notice shall be included in
14 * all copies or substantial portions of the Software.
15 *
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
19 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
20 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
21 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
22 * OTHER DEALINGS IN THE SOFTWARE.
23 *
24 * Authors:
25 * Rob Clark <robdclark@gmail.com>
26 * Daniel Vetter <daniel.vetter@ffwll.ch>
27 */
28
29
30#include <linux/sync_file.h>
31
32#include <drm/drm_atomic.h>
33#include <drm/drm_atomic_uapi.h>
34#include <drm/drm_blend.h>
35#include <drm/drm_bridge.h>
36#include <drm/drm_debugfs.h>
37#include <drm/drm_device.h>
38#include <drm/drm_drv.h>
39#include <drm/drm_file.h>
40#include <drm/drm_fourcc.h>
41#include <drm/drm_framebuffer.h>
42#include <drm/drm_mode.h>
43#include <drm/drm_print.h>
44#include <drm/drm_writeback.h>
45
46#include "drm_crtc_internal.h"
47#include "drm_internal.h"
48
49void __drm_crtc_commit_free(struct kref *kref)
50{
51 struct drm_crtc_commit *commit =
52 container_of(kref, struct drm_crtc_commit, ref);
53
54 kfree(commit);
55}
56EXPORT_SYMBOL(__drm_crtc_commit_free);
57
58/**
59 * drm_crtc_commit_wait - Waits for a commit to complete
60 * @commit: &drm_crtc_commit to wait for
61 *
62 * Waits for a given &drm_crtc_commit to be programmed into the
63 * hardware and flipped to.
64 *
65 * Returns:
66 *
67 * 0 on success, a negative error code otherwise.
68 */
69int drm_crtc_commit_wait(struct drm_crtc_commit *commit)
70{
71 unsigned long timeout = 10 * HZ;
72 int ret;
73
74 if (!commit)
75 return 0;
76
77 ret = wait_for_completion_timeout(&commit->hw_done, timeout);
78 if (!ret) {
79 drm_err(commit->crtc->dev, "hw_done timed out\n");
80 return -ETIMEDOUT;
81 }
82
83 /*
84 * Currently no support for overwriting flips, hence
85 * stall for previous one to execute completely.
86 */
87 ret = wait_for_completion_timeout(&commit->flip_done, timeout);
88 if (!ret) {
89 drm_err(commit->crtc->dev, "flip_done timed out\n");
90 return -ETIMEDOUT;
91 }
92
93 return 0;
94}
95EXPORT_SYMBOL(drm_crtc_commit_wait);
96
97/**
98 * drm_atomic_state_default_release -
99 * release memory initialized by drm_atomic_state_init
100 * @state: atomic state
101 *
102 * Free all the memory allocated by drm_atomic_state_init.
103 * This should only be used by drivers which are still subclassing
104 * &drm_atomic_state and haven't switched to &drm_private_state yet.
105 */
106void drm_atomic_state_default_release(struct drm_atomic_state *state)
107{
108 kfree(state->connectors);
109 kfree(state->crtcs);
110 kfree(state->planes);
111 kfree(state->private_objs);
112}
113EXPORT_SYMBOL(drm_atomic_state_default_release);
114
115/**
116 * drm_atomic_state_init - init new atomic state
117 * @dev: DRM device
118 * @state: atomic state
119 *
120 * Default implementation for filling in a new atomic state.
121 * This should only be used by drivers which are still subclassing
122 * &drm_atomic_state and haven't switched to &drm_private_state yet.
123 */
124int
125drm_atomic_state_init(struct drm_device *dev, struct drm_atomic_state *state)
126{
127 kref_init(&state->ref);
128
129 /* TODO legacy paths should maybe do a better job about
130 * setting this appropriately?
131 */
132 state->allow_modeset = true;
133
134 state->crtcs = kcalloc(dev->mode_config.num_crtc,
135 sizeof(*state->crtcs), GFP_KERNEL);
136 if (!state->crtcs)
137 goto fail;
138 state->planes = kcalloc(dev->mode_config.num_total_plane,
139 sizeof(*state->planes), GFP_KERNEL);
140 if (!state->planes)
141 goto fail;
142
143 /*
144 * Because drm_atomic_state can be committed asynchronously we need our
145 * own reference and cannot rely on the on implied by drm_file in the
146 * ioctl call.
147 */
148 drm_dev_get(dev);
149 state->dev = dev;
150
151 drm_dbg_atomic(dev, "Allocated atomic state %p\n", state);
152
153 return 0;
154fail:
155 drm_atomic_state_default_release(state);
156 return -ENOMEM;
157}
158EXPORT_SYMBOL(drm_atomic_state_init);
159
160/**
161 * drm_atomic_state_alloc - allocate atomic state
162 * @dev: DRM device
163 *
164 * This allocates an empty atomic state to track updates.
165 */
166struct drm_atomic_state *
167drm_atomic_state_alloc(struct drm_device *dev)
168{
169 struct drm_mode_config *config = &dev->mode_config;
170
171 if (!config->funcs->atomic_state_alloc) {
172 struct drm_atomic_state *state;
173
174 state = kzalloc(sizeof(*state), GFP_KERNEL);
175 if (!state)
176 return NULL;
177 if (drm_atomic_state_init(dev, state) < 0) {
178 kfree(state);
179 return NULL;
180 }
181 return state;
182 }
183
184 return config->funcs->atomic_state_alloc(dev);
185}
186EXPORT_SYMBOL(drm_atomic_state_alloc);
187
188/**
189 * drm_atomic_state_default_clear - clear base atomic state
190 * @state: atomic state
191 *
192 * Default implementation for clearing atomic state.
193 * This should only be used by drivers which are still subclassing
194 * &drm_atomic_state and haven't switched to &drm_private_state yet.
195 */
196void drm_atomic_state_default_clear(struct drm_atomic_state *state)
197{
198 struct drm_device *dev = state->dev;
199 struct drm_mode_config *config = &dev->mode_config;
200 int i;
201
202 drm_dbg_atomic(dev, "Clearing atomic state %p\n", state);
203
204 for (i = 0; i < state->num_connector; i++) {
205 struct drm_connector *connector = state->connectors[i].ptr;
206
207 if (!connector)
208 continue;
209
210 connector->funcs->atomic_destroy_state(connector,
211 state->connectors[i].state);
212 state->connectors[i].ptr = NULL;
213 state->connectors[i].state = NULL;
214 state->connectors[i].old_state = NULL;
215 state->connectors[i].new_state = NULL;
216 drm_connector_put(connector);
217 }
218
219 for (i = 0; i < config->num_crtc; i++) {
220 struct drm_crtc *crtc = state->crtcs[i].ptr;
221
222 if (!crtc)
223 continue;
224
225 crtc->funcs->atomic_destroy_state(crtc,
226 state->crtcs[i].state);
227
228 state->crtcs[i].ptr = NULL;
229 state->crtcs[i].state = NULL;
230 state->crtcs[i].old_state = NULL;
231 state->crtcs[i].new_state = NULL;
232
233 if (state->crtcs[i].commit) {
234 drm_crtc_commit_put(state->crtcs[i].commit);
235 state->crtcs[i].commit = NULL;
236 }
237 }
238
239 for (i = 0; i < config->num_total_plane; i++) {
240 struct drm_plane *plane = state->planes[i].ptr;
241
242 if (!plane)
243 continue;
244
245 plane->funcs->atomic_destroy_state(plane,
246 state->planes[i].state);
247 state->planes[i].ptr = NULL;
248 state->planes[i].state = NULL;
249 state->planes[i].old_state = NULL;
250 state->planes[i].new_state = NULL;
251 }
252
253 for (i = 0; i < state->num_private_objs; i++) {
254 struct drm_private_obj *obj = state->private_objs[i].ptr;
255
256 obj->funcs->atomic_destroy_state(obj,
257 state->private_objs[i].state);
258 state->private_objs[i].ptr = NULL;
259 state->private_objs[i].state = NULL;
260 state->private_objs[i].old_state = NULL;
261 state->private_objs[i].new_state = NULL;
262 }
263 state->num_private_objs = 0;
264
265 if (state->fake_commit) {
266 drm_crtc_commit_put(state->fake_commit);
267 state->fake_commit = NULL;
268 }
269}
270EXPORT_SYMBOL(drm_atomic_state_default_clear);
271
272/**
273 * drm_atomic_state_clear - clear state object
274 * @state: atomic state
275 *
276 * When the w/w mutex algorithm detects a deadlock we need to back off and drop
277 * all locks. So someone else could sneak in and change the current modeset
278 * configuration. Which means that all the state assembled in @state is no
279 * longer an atomic update to the current state, but to some arbitrary earlier
280 * state. Which could break assumptions the driver's
281 * &drm_mode_config_funcs.atomic_check likely relies on.
282 *
283 * Hence we must clear all cached state and completely start over, using this
284 * function.
285 */
286void drm_atomic_state_clear(struct drm_atomic_state *state)
287{
288 struct drm_device *dev = state->dev;
289 struct drm_mode_config *config = &dev->mode_config;
290
291 if (config->funcs->atomic_state_clear)
292 config->funcs->atomic_state_clear(state);
293 else
294 drm_atomic_state_default_clear(state);
295}
296EXPORT_SYMBOL(drm_atomic_state_clear);
297
298/**
299 * __drm_atomic_state_free - free all memory for an atomic state
300 * @ref: This atomic state to deallocate
301 *
302 * This frees all memory associated with an atomic state, including all the
303 * per-object state for planes, CRTCs and connectors.
304 */
305void __drm_atomic_state_free(struct kref *ref)
306{
307 struct drm_atomic_state *state = container_of(ref, typeof(*state), ref);
308 struct drm_device *dev = state->dev;
309 struct drm_mode_config *config = &dev->mode_config;
310
311 drm_atomic_state_clear(state);
312
313 drm_dbg_atomic(state->dev, "Freeing atomic state %p\n", state);
314
315 if (config->funcs->atomic_state_free) {
316 config->funcs->atomic_state_free(state);
317 } else {
318 drm_atomic_state_default_release(state);
319 kfree(state);
320 }
321
322 drm_dev_put(dev);
323}
324EXPORT_SYMBOL(__drm_atomic_state_free);
325
326/**
327 * drm_atomic_get_crtc_state - get CRTC state
328 * @state: global atomic state object
329 * @crtc: CRTC to get state object for
330 *
331 * This function returns the CRTC state for the given CRTC, allocating it if
332 * needed. It will also grab the relevant CRTC lock to make sure that the state
333 * is consistent.
334 *
335 * WARNING: Drivers may only add new CRTC states to a @state if
336 * drm_atomic_state.allow_modeset is set, or if it's a driver-internal commit
337 * not created by userspace through an IOCTL call.
338 *
339 * Returns:
340 *
341 * Either the allocated state or the error code encoded into the pointer. When
342 * the error is EDEADLK then the w/w mutex code has detected a deadlock and the
343 * entire atomic sequence must be restarted. All other errors are fatal.
344 */
345struct drm_crtc_state *
346drm_atomic_get_crtc_state(struct drm_atomic_state *state,
347 struct drm_crtc *crtc)
348{
349 int ret, index = drm_crtc_index(crtc);
350 struct drm_crtc_state *crtc_state;
351
352 WARN_ON(!state->acquire_ctx);
353
354 crtc_state = drm_atomic_get_existing_crtc_state(state, crtc);
355 if (crtc_state)
356 return crtc_state;
357
358 ret = drm_modeset_lock(&crtc->mutex, state->acquire_ctx);
359 if (ret)
360 return ERR_PTR(ret);
361
362 crtc_state = crtc->funcs->atomic_duplicate_state(crtc);
363 if (!crtc_state)
364 return ERR_PTR(-ENOMEM);
365
366 state->crtcs[index].state = crtc_state;
367 state->crtcs[index].old_state = crtc->state;
368 state->crtcs[index].new_state = crtc_state;
369 state->crtcs[index].ptr = crtc;
370 crtc_state->state = state;
371
372 drm_dbg_atomic(state->dev, "Added [CRTC:%d:%s] %p state to %p\n",
373 crtc->base.id, crtc->name, crtc_state, state);
374
375 return crtc_state;
376}
377EXPORT_SYMBOL(drm_atomic_get_crtc_state);
378
379static int drm_atomic_crtc_check(const struct drm_crtc_state *old_crtc_state,
380 const struct drm_crtc_state *new_crtc_state)
381{
382 struct drm_crtc *crtc = new_crtc_state->crtc;
383
384 /* NOTE: we explicitly don't enforce constraints such as primary
385 * layer covering entire screen, since that is something we want
386 * to allow (on hw that supports it). For hw that does not, it
387 * should be checked in driver's crtc->atomic_check() vfunc.
388 *
389 * TODO: Add generic modeset state checks once we support those.
390 */
391
392 if (new_crtc_state->active && !new_crtc_state->enable) {
393 drm_dbg_atomic(crtc->dev,
394 "[CRTC:%d:%s] active without enabled\n",
395 crtc->base.id, crtc->name);
396 return -EINVAL;
397 }
398
399 /* The state->enable vs. state->mode_blob checks can be WARN_ON,
400 * as this is a kernel-internal detail that userspace should never
401 * be able to trigger.
402 */
403 if (drm_core_check_feature(crtc->dev, DRIVER_ATOMIC) &&
404 WARN_ON(new_crtc_state->enable && !new_crtc_state->mode_blob)) {
405 drm_dbg_atomic(crtc->dev,
406 "[CRTC:%d:%s] enabled without mode blob\n",
407 crtc->base.id, crtc->name);
408 return -EINVAL;
409 }
410
411 if (drm_core_check_feature(crtc->dev, DRIVER_ATOMIC) &&
412 WARN_ON(!new_crtc_state->enable && new_crtc_state->mode_blob)) {
413 drm_dbg_atomic(crtc->dev,
414 "[CRTC:%d:%s] disabled with mode blob\n",
415 crtc->base.id, crtc->name);
416 return -EINVAL;
417 }
418
419 /*
420 * Reject event generation for when a CRTC is off and stays off.
421 * It wouldn't be hard to implement this, but userspace has a track
422 * record of happily burning through 100% cpu (or worse, crash) when the
423 * display pipe is suspended. To avoid all that fun just reject updates
424 * that ask for events since likely that indicates a bug in the
425 * compositor's drawing loop. This is consistent with the vblank IOCTL
426 * and legacy page_flip IOCTL which also reject service on a disabled
427 * pipe.
428 */
429 if (new_crtc_state->event &&
430 !new_crtc_state->active && !old_crtc_state->active) {
431 drm_dbg_atomic(crtc->dev,
432 "[CRTC:%d:%s] requesting event but off\n",
433 crtc->base.id, crtc->name);
434 return -EINVAL;
435 }
436
437 return 0;
438}
439
440static void drm_atomic_crtc_print_state(struct drm_printer *p,
441 const struct drm_crtc_state *state)
442{
443 struct drm_crtc *crtc = state->crtc;
444
445 drm_printf(p, "crtc[%u]: %s\n", crtc->base.id, crtc->name);
446 drm_printf(p, "\tenable=%d\n", state->enable);
447 drm_printf(p, "\tactive=%d\n", state->active);
448 drm_printf(p, "\tself_refresh_active=%d\n", state->self_refresh_active);
449 drm_printf(p, "\tplanes_changed=%d\n", state->planes_changed);
450 drm_printf(p, "\tmode_changed=%d\n", state->mode_changed);
451 drm_printf(p, "\tactive_changed=%d\n", state->active_changed);
452 drm_printf(p, "\tconnectors_changed=%d\n", state->connectors_changed);
453 drm_printf(p, "\tcolor_mgmt_changed=%d\n", state->color_mgmt_changed);
454 drm_printf(p, "\tplane_mask=%x\n", state->plane_mask);
455 drm_printf(p, "\tconnector_mask=%x\n", state->connector_mask);
456 drm_printf(p, "\tencoder_mask=%x\n", state->encoder_mask);
457 drm_printf(p, "\tmode: " DRM_MODE_FMT "\n", DRM_MODE_ARG(&state->mode));
458
459 if (crtc->funcs->atomic_print_state)
460 crtc->funcs->atomic_print_state(p, state);
461}
462
463static int drm_atomic_connector_check(struct drm_connector *connector,
464 struct drm_connector_state *state)
465{
466 struct drm_crtc_state *crtc_state;
467 struct drm_writeback_job *writeback_job = state->writeback_job;
468 const struct drm_display_info *info = &connector->display_info;
469
470 state->max_bpc = info->bpc ? info->bpc : 8;
471 if (connector->max_bpc_property)
472 state->max_bpc = min(state->max_bpc, state->max_requested_bpc);
473
474 if ((connector->connector_type != DRM_MODE_CONNECTOR_WRITEBACK) || !writeback_job)
475 return 0;
476
477 if (writeback_job->fb && !state->crtc) {
478 drm_dbg_atomic(connector->dev,
479 "[CONNECTOR:%d:%s] framebuffer without CRTC\n",
480 connector->base.id, connector->name);
481 return -EINVAL;
482 }
483
484 if (state->crtc)
485 crtc_state = drm_atomic_get_existing_crtc_state(state->state,
486 state->crtc);
487
488 if (writeback_job->fb && !crtc_state->active) {
489 drm_dbg_atomic(connector->dev,
490 "[CONNECTOR:%d:%s] has framebuffer, but [CRTC:%d] is off\n",
491 connector->base.id, connector->name,
492 state->crtc->base.id);
493 return -EINVAL;
494 }
495
496 if (!writeback_job->fb) {
497 if (writeback_job->out_fence) {
498 drm_dbg_atomic(connector->dev,
499 "[CONNECTOR:%d:%s] requesting out-fence without framebuffer\n",
500 connector->base.id, connector->name);
501 return -EINVAL;
502 }
503
504 drm_writeback_cleanup_job(writeback_job);
505 state->writeback_job = NULL;
506 }
507
508 return 0;
509}
510
511/**
512 * drm_atomic_get_plane_state - get plane state
513 * @state: global atomic state object
514 * @plane: plane to get state object for
515 *
516 * This function returns the plane state for the given plane, allocating it if
517 * needed. It will also grab the relevant plane lock to make sure that the state
518 * is consistent.
519 *
520 * Returns:
521 *
522 * Either the allocated state or the error code encoded into the pointer. When
523 * the error is EDEADLK then the w/w mutex code has detected a deadlock and the
524 * entire atomic sequence must be restarted. All other errors are fatal.
525 */
526struct drm_plane_state *
527drm_atomic_get_plane_state(struct drm_atomic_state *state,
528 struct drm_plane *plane)
529{
530 int ret, index = drm_plane_index(plane);
531 struct drm_plane_state *plane_state;
532
533 WARN_ON(!state->acquire_ctx);
534
535 /* the legacy pointers should never be set */
536 WARN_ON(plane->fb);
537 WARN_ON(plane->old_fb);
538 WARN_ON(plane->crtc);
539
540 plane_state = drm_atomic_get_existing_plane_state(state, plane);
541 if (plane_state)
542 return plane_state;
543
544 ret = drm_modeset_lock(&plane->mutex, state->acquire_ctx);
545 if (ret)
546 return ERR_PTR(ret);
547
548 plane_state = plane->funcs->atomic_duplicate_state(plane);
549 if (!plane_state)
550 return ERR_PTR(-ENOMEM);
551
552 state->planes[index].state = plane_state;
553 state->planes[index].ptr = plane;
554 state->planes[index].old_state = plane->state;
555 state->planes[index].new_state = plane_state;
556 plane_state->state = state;
557
558 drm_dbg_atomic(plane->dev, "Added [PLANE:%d:%s] %p state to %p\n",
559 plane->base.id, plane->name, plane_state, state);
560
561 if (plane_state->crtc) {
562 struct drm_crtc_state *crtc_state;
563
564 crtc_state = drm_atomic_get_crtc_state(state,
565 plane_state->crtc);
566 if (IS_ERR(crtc_state))
567 return ERR_CAST(crtc_state);
568 }
569
570 return plane_state;
571}
572EXPORT_SYMBOL(drm_atomic_get_plane_state);
573
574static bool
575plane_switching_crtc(const struct drm_plane_state *old_plane_state,
576 const struct drm_plane_state *new_plane_state)
577{
578 if (!old_plane_state->crtc || !new_plane_state->crtc)
579 return false;
580
581 if (old_plane_state->crtc == new_plane_state->crtc)
582 return false;
583
584 /* This could be refined, but currently there's no helper or driver code
585 * to implement direct switching of active planes nor userspace to take
586 * advantage of more direct plane switching without the intermediate
587 * full OFF state.
588 */
589 return true;
590}
591
592/**
593 * drm_atomic_plane_check - check plane state
594 * @old_plane_state: old plane state to check
595 * @new_plane_state: new plane state to check
596 *
597 * Provides core sanity checks for plane state.
598 *
599 * RETURNS:
600 * Zero on success, error code on failure
601 */
602static int drm_atomic_plane_check(const struct drm_plane_state *old_plane_state,
603 const struct drm_plane_state *new_plane_state)
604{
605 struct drm_plane *plane = new_plane_state->plane;
606 struct drm_crtc *crtc = new_plane_state->crtc;
607 const struct drm_framebuffer *fb = new_plane_state->fb;
608 unsigned int fb_width, fb_height;
609 struct drm_mode_rect *clips;
610 uint32_t num_clips;
611 int ret;
612
613 /* either *both* CRTC and FB must be set, or neither */
614 if (crtc && !fb) {
615 drm_dbg_atomic(plane->dev, "[PLANE:%d:%s] CRTC set but no FB\n",
616 plane->base.id, plane->name);
617 return -EINVAL;
618 } else if (fb && !crtc) {
619 drm_dbg_atomic(plane->dev, "[PLANE:%d:%s] FB set but no CRTC\n",
620 plane->base.id, plane->name);
621 return -EINVAL;
622 }
623
624 /* if disabled, we don't care about the rest of the state: */
625 if (!crtc)
626 return 0;
627
628 /* Check whether this plane is usable on this CRTC */
629 if (!(plane->possible_crtcs & drm_crtc_mask(crtc))) {
630 drm_dbg_atomic(plane->dev,
631 "Invalid [CRTC:%d:%s] for [PLANE:%d:%s]\n",
632 crtc->base.id, crtc->name,
633 plane->base.id, plane->name);
634 return -EINVAL;
635 }
636
637 /* Check whether this plane supports the fb pixel format. */
638 ret = drm_plane_check_pixel_format(plane, fb->format->format,
639 fb->modifier);
640 if (ret) {
641 drm_dbg_atomic(plane->dev,
642 "[PLANE:%d:%s] invalid pixel format %p4cc, modifier 0x%llx\n",
643 plane->base.id, plane->name,
644 &fb->format->format, fb->modifier);
645 return ret;
646 }
647
648 /* Give drivers some help against integer overflows */
649 if (new_plane_state->crtc_w > INT_MAX ||
650 new_plane_state->crtc_x > INT_MAX - (int32_t) new_plane_state->crtc_w ||
651 new_plane_state->crtc_h > INT_MAX ||
652 new_plane_state->crtc_y > INT_MAX - (int32_t) new_plane_state->crtc_h) {
653 drm_dbg_atomic(plane->dev,
654 "[PLANE:%d:%s] invalid CRTC coordinates %ux%u+%d+%d\n",
655 plane->base.id, plane->name,
656 new_plane_state->crtc_w, new_plane_state->crtc_h,
657 new_plane_state->crtc_x, new_plane_state->crtc_y);
658 return -ERANGE;
659 }
660
661 fb_width = fb->width << 16;
662 fb_height = fb->height << 16;
663
664 /* Make sure source coordinates are inside the fb. */
665 if (new_plane_state->src_w > fb_width ||
666 new_plane_state->src_x > fb_width - new_plane_state->src_w ||
667 new_plane_state->src_h > fb_height ||
668 new_plane_state->src_y > fb_height - new_plane_state->src_h) {
669 drm_dbg_atomic(plane->dev,
670 "[PLANE:%d:%s] invalid source coordinates "
671 "%u.%06ux%u.%06u+%u.%06u+%u.%06u (fb %ux%u)\n",
672 plane->base.id, plane->name,
673 new_plane_state->src_w >> 16,
674 ((new_plane_state->src_w & 0xffff) * 15625) >> 10,
675 new_plane_state->src_h >> 16,
676 ((new_plane_state->src_h & 0xffff) * 15625) >> 10,
677 new_plane_state->src_x >> 16,
678 ((new_plane_state->src_x & 0xffff) * 15625) >> 10,
679 new_plane_state->src_y >> 16,
680 ((new_plane_state->src_y & 0xffff) * 15625) >> 10,
681 fb->width, fb->height);
682 return -ENOSPC;
683 }
684
685 clips = __drm_plane_get_damage_clips(new_plane_state);
686 num_clips = drm_plane_get_damage_clips_count(new_plane_state);
687
688 /* Make sure damage clips are valid and inside the fb. */
689 while (num_clips > 0) {
690 if (clips->x1 >= clips->x2 ||
691 clips->y1 >= clips->y2 ||
692 clips->x1 < 0 ||
693 clips->y1 < 0 ||
694 clips->x2 > fb_width ||
695 clips->y2 > fb_height) {
696 drm_dbg_atomic(plane->dev,
697 "[PLANE:%d:%s] invalid damage clip %d %d %d %d\n",
698 plane->base.id, plane->name, clips->x1,
699 clips->y1, clips->x2, clips->y2);
700 return -EINVAL;
701 }
702 clips++;
703 num_clips--;
704 }
705
706 if (plane_switching_crtc(old_plane_state, new_plane_state)) {
707 drm_dbg_atomic(plane->dev,
708 "[PLANE:%d:%s] switching CRTC directly\n",
709 plane->base.id, plane->name);
710 return -EINVAL;
711 }
712
713 return 0;
714}
715
716static void drm_atomic_plane_print_state(struct drm_printer *p,
717 const struct drm_plane_state *state)
718{
719 struct drm_plane *plane = state->plane;
720 struct drm_rect src = drm_plane_state_src(state);
721 struct drm_rect dest = drm_plane_state_dest(state);
722
723 drm_printf(p, "plane[%u]: %s\n", plane->base.id, plane->name);
724 drm_printf(p, "\tcrtc=%s\n", state->crtc ? state->crtc->name : "(null)");
725 drm_printf(p, "\tfb=%u\n", state->fb ? state->fb->base.id : 0);
726 if (state->fb)
727 drm_framebuffer_print_info(p, 2, state->fb);
728 drm_printf(p, "\tcrtc-pos=" DRM_RECT_FMT "\n", DRM_RECT_ARG(&dest));
729 drm_printf(p, "\tsrc-pos=" DRM_RECT_FP_FMT "\n", DRM_RECT_FP_ARG(&src));
730 drm_printf(p, "\trotation=%x\n", state->rotation);
731 drm_printf(p, "\tnormalized-zpos=%x\n", state->normalized_zpos);
732 drm_printf(p, "\tcolor-encoding=%s\n",
733 drm_get_color_encoding_name(state->color_encoding));
734 drm_printf(p, "\tcolor-range=%s\n",
735 drm_get_color_range_name(state->color_range));
736 drm_printf(p, "\tcolor_mgmt_changed=%d\n", state->color_mgmt_changed);
737
738 if (plane->funcs->atomic_print_state)
739 plane->funcs->atomic_print_state(p, state);
740}
741
742/**
743 * DOC: handling driver private state
744 *
745 * Very often the DRM objects exposed to userspace in the atomic modeset api
746 * (&drm_connector, &drm_crtc and &drm_plane) do not map neatly to the
747 * underlying hardware. Especially for any kind of shared resources (e.g. shared
748 * clocks, scaler units, bandwidth and fifo limits shared among a group of
749 * planes or CRTCs, and so on) it makes sense to model these as independent
750 * objects. Drivers then need to do similar state tracking and commit ordering for
751 * such private (since not exposed to userspace) objects as the atomic core and
752 * helpers already provide for connectors, planes and CRTCs.
753 *
754 * To make this easier on drivers the atomic core provides some support to track
755 * driver private state objects using struct &drm_private_obj, with the
756 * associated state struct &drm_private_state.
757 *
758 * Similar to userspace-exposed objects, private state structures can be
759 * acquired by calling drm_atomic_get_private_obj_state(). This also takes care
760 * of locking, hence drivers should not have a need to call drm_modeset_lock()
761 * directly. Sequence of the actual hardware state commit is not handled,
762 * drivers might need to keep track of struct drm_crtc_commit within subclassed
763 * structure of &drm_private_state as necessary, e.g. similar to
764 * &drm_plane_state.commit. See also &drm_atomic_state.fake_commit.
765 *
766 * All private state structures contained in a &drm_atomic_state update can be
767 * iterated using for_each_oldnew_private_obj_in_state(),
768 * for_each_new_private_obj_in_state() and for_each_old_private_obj_in_state().
769 * Drivers are recommended to wrap these for each type of driver private state
770 * object they have, filtering on &drm_private_obj.funcs using for_each_if(), at
771 * least if they want to iterate over all objects of a given type.
772 *
773 * An earlier way to handle driver private state was by subclassing struct
774 * &drm_atomic_state. But since that encourages non-standard ways to implement
775 * the check/commit split atomic requires (by using e.g. "check and rollback or
776 * commit instead" of "duplicate state, check, then either commit or release
777 * duplicated state) it is deprecated in favour of using &drm_private_state.
778 */
779
780/**
781 * drm_atomic_private_obj_init - initialize private object
782 * @dev: DRM device this object will be attached to
783 * @obj: private object
784 * @state: initial private object state
785 * @funcs: pointer to the struct of function pointers that identify the object
786 * type
787 *
788 * Initialize the private object, which can be embedded into any
789 * driver private object that needs its own atomic state.
790 */
791void
792drm_atomic_private_obj_init(struct drm_device *dev,
793 struct drm_private_obj *obj,
794 struct drm_private_state *state,
795 const struct drm_private_state_funcs *funcs)
796{
797 memset(obj, 0, sizeof(*obj));
798
799 drm_modeset_lock_init(&obj->lock);
800
801 obj->state = state;
802 obj->funcs = funcs;
803 list_add_tail(&obj->head, &dev->mode_config.privobj_list);
804
805 state->obj = obj;
806}
807EXPORT_SYMBOL(drm_atomic_private_obj_init);
808
809/**
810 * drm_atomic_private_obj_fini - finalize private object
811 * @obj: private object
812 *
813 * Finalize the private object.
814 */
815void
816drm_atomic_private_obj_fini(struct drm_private_obj *obj)
817{
818 list_del(&obj->head);
819 obj->funcs->atomic_destroy_state(obj, obj->state);
820 drm_modeset_lock_fini(&obj->lock);
821}
822EXPORT_SYMBOL(drm_atomic_private_obj_fini);
823
824/**
825 * drm_atomic_get_private_obj_state - get private object state
826 * @state: global atomic state
827 * @obj: private object to get the state for
828 *
829 * This function returns the private object state for the given private object,
830 * allocating the state if needed. It will also grab the relevant private
831 * object lock to make sure that the state is consistent.
832 *
833 * RETURNS:
834 *
835 * Either the allocated state or the error code encoded into a pointer.
836 */
837struct drm_private_state *
838drm_atomic_get_private_obj_state(struct drm_atomic_state *state,
839 struct drm_private_obj *obj)
840{
841 int index, num_objs, i, ret;
842 size_t size;
843 struct __drm_private_objs_state *arr;
844 struct drm_private_state *obj_state;
845
846 for (i = 0; i < state->num_private_objs; i++)
847 if (obj == state->private_objs[i].ptr)
848 return state->private_objs[i].state;
849
850 ret = drm_modeset_lock(&obj->lock, state->acquire_ctx);
851 if (ret)
852 return ERR_PTR(ret);
853
854 num_objs = state->num_private_objs + 1;
855 size = sizeof(*state->private_objs) * num_objs;
856 arr = krealloc(state->private_objs, size, GFP_KERNEL);
857 if (!arr)
858 return ERR_PTR(-ENOMEM);
859
860 state->private_objs = arr;
861 index = state->num_private_objs;
862 memset(&state->private_objs[index], 0, sizeof(*state->private_objs));
863
864 obj_state = obj->funcs->atomic_duplicate_state(obj);
865 if (!obj_state)
866 return ERR_PTR(-ENOMEM);
867
868 state->private_objs[index].state = obj_state;
869 state->private_objs[index].old_state = obj->state;
870 state->private_objs[index].new_state = obj_state;
871 state->private_objs[index].ptr = obj;
872 obj_state->state = state;
873
874 state->num_private_objs = num_objs;
875
876 drm_dbg_atomic(state->dev,
877 "Added new private object %p state %p to %p\n",
878 obj, obj_state, state);
879
880 return obj_state;
881}
882EXPORT_SYMBOL(drm_atomic_get_private_obj_state);
883
884/**
885 * drm_atomic_get_old_private_obj_state
886 * @state: global atomic state object
887 * @obj: private_obj to grab
888 *
889 * This function returns the old private object state for the given private_obj,
890 * or NULL if the private_obj is not part of the global atomic state.
891 */
892struct drm_private_state *
893drm_atomic_get_old_private_obj_state(const struct drm_atomic_state *state,
894 struct drm_private_obj *obj)
895{
896 int i;
897
898 for (i = 0; i < state->num_private_objs; i++)
899 if (obj == state->private_objs[i].ptr)
900 return state->private_objs[i].old_state;
901
902 return NULL;
903}
904EXPORT_SYMBOL(drm_atomic_get_old_private_obj_state);
905
906/**
907 * drm_atomic_get_new_private_obj_state
908 * @state: global atomic state object
909 * @obj: private_obj to grab
910 *
911 * This function returns the new private object state for the given private_obj,
912 * or NULL if the private_obj is not part of the global atomic state.
913 */
914struct drm_private_state *
915drm_atomic_get_new_private_obj_state(const struct drm_atomic_state *state,
916 struct drm_private_obj *obj)
917{
918 int i;
919
920 for (i = 0; i < state->num_private_objs; i++)
921 if (obj == state->private_objs[i].ptr)
922 return state->private_objs[i].new_state;
923
924 return NULL;
925}
926EXPORT_SYMBOL(drm_atomic_get_new_private_obj_state);
927
928/**
929 * drm_atomic_get_old_connector_for_encoder - Get old connector for an encoder
930 * @state: Atomic state
931 * @encoder: The encoder to fetch the connector state for
932 *
933 * This function finds and returns the connector that was connected to @encoder
934 * as specified by the @state.
935 *
936 * If there is no connector in @state which previously had @encoder connected to
937 * it, this function will return NULL. While this may seem like an invalid use
938 * case, it is sometimes useful to differentiate commits which had no prior
939 * connectors attached to @encoder vs ones that did (and to inspect their
940 * state). This is especially true in enable hooks because the pipeline has
941 * changed.
942 *
943 * Returns: The old connector connected to @encoder, or NULL if the encoder is
944 * not connected.
945 */
946struct drm_connector *
947drm_atomic_get_old_connector_for_encoder(const struct drm_atomic_state *state,
948 struct drm_encoder *encoder)
949{
950 struct drm_connector_state *conn_state;
951 struct drm_connector *connector;
952 unsigned int i;
953
954 for_each_old_connector_in_state(state, connector, conn_state, i) {
955 if (conn_state->best_encoder == encoder)
956 return connector;
957 }
958
959 return NULL;
960}
961EXPORT_SYMBOL(drm_atomic_get_old_connector_for_encoder);
962
963/**
964 * drm_atomic_get_new_connector_for_encoder - Get new connector for an encoder
965 * @state: Atomic state
966 * @encoder: The encoder to fetch the connector state for
967 *
968 * This function finds and returns the connector that will be connected to
969 * @encoder as specified by the @state.
970 *
971 * If there is no connector in @state which will have @encoder connected to it,
972 * this function will return NULL. While this may seem like an invalid use case,
973 * it is sometimes useful to differentiate commits which have no connectors
974 * attached to @encoder vs ones that do (and to inspect their state). This is
975 * especially true in disable hooks because the pipeline will change.
976 *
977 * Returns: The new connector connected to @encoder, or NULL if the encoder is
978 * not connected.
979 */
980struct drm_connector *
981drm_atomic_get_new_connector_for_encoder(const struct drm_atomic_state *state,
982 struct drm_encoder *encoder)
983{
984 struct drm_connector_state *conn_state;
985 struct drm_connector *connector;
986 unsigned int i;
987
988 for_each_new_connector_in_state(state, connector, conn_state, i) {
989 if (conn_state->best_encoder == encoder)
990 return connector;
991 }
992
993 return NULL;
994}
995EXPORT_SYMBOL(drm_atomic_get_new_connector_for_encoder);
996
997/**
998 * drm_atomic_get_old_crtc_for_encoder - Get old crtc for an encoder
999 * @state: Atomic state
1000 * @encoder: The encoder to fetch the crtc state for
1001 *
1002 * This function finds and returns the crtc that was connected to @encoder
1003 * as specified by the @state.
1004 *
1005 * Returns: The old crtc connected to @encoder, or NULL if the encoder is
1006 * not connected.
1007 */
1008struct drm_crtc *
1009drm_atomic_get_old_crtc_for_encoder(struct drm_atomic_state *state,
1010 struct drm_encoder *encoder)
1011{
1012 struct drm_connector *connector;
1013 struct drm_connector_state *conn_state;
1014
1015 connector = drm_atomic_get_old_connector_for_encoder(state, encoder);
1016 if (!connector)
1017 return NULL;
1018
1019 conn_state = drm_atomic_get_old_connector_state(state, connector);
1020 if (!conn_state)
1021 return NULL;
1022
1023 return conn_state->crtc;
1024}
1025EXPORT_SYMBOL(drm_atomic_get_old_crtc_for_encoder);
1026
1027/**
1028 * drm_atomic_get_new_crtc_for_encoder - Get new crtc for an encoder
1029 * @state: Atomic state
1030 * @encoder: The encoder to fetch the crtc state for
1031 *
1032 * This function finds and returns the crtc that will be connected to @encoder
1033 * as specified by the @state.
1034 *
1035 * Returns: The new crtc connected to @encoder, or NULL if the encoder is
1036 * not connected.
1037 */
1038struct drm_crtc *
1039drm_atomic_get_new_crtc_for_encoder(struct drm_atomic_state *state,
1040 struct drm_encoder *encoder)
1041{
1042 struct drm_connector *connector;
1043 struct drm_connector_state *conn_state;
1044
1045 connector = drm_atomic_get_new_connector_for_encoder(state, encoder);
1046 if (!connector)
1047 return NULL;
1048
1049 conn_state = drm_atomic_get_new_connector_state(state, connector);
1050 if (!conn_state)
1051 return NULL;
1052
1053 return conn_state->crtc;
1054}
1055EXPORT_SYMBOL(drm_atomic_get_new_crtc_for_encoder);
1056
1057/**
1058 * drm_atomic_get_connector_state - get connector state
1059 * @state: global atomic state object
1060 * @connector: connector to get state object for
1061 *
1062 * This function returns the connector state for the given connector,
1063 * allocating it if needed. It will also grab the relevant connector lock to
1064 * make sure that the state is consistent.
1065 *
1066 * Returns:
1067 *
1068 * Either the allocated state or the error code encoded into the pointer. When
1069 * the error is EDEADLK then the w/w mutex code has detected a deadlock and the
1070 * entire atomic sequence must be restarted. All other errors are fatal.
1071 */
1072struct drm_connector_state *
1073drm_atomic_get_connector_state(struct drm_atomic_state *state,
1074 struct drm_connector *connector)
1075{
1076 int ret, index;
1077 struct drm_mode_config *config = &connector->dev->mode_config;
1078 struct drm_connector_state *connector_state;
1079
1080 WARN_ON(!state->acquire_ctx);
1081
1082 ret = drm_modeset_lock(&config->connection_mutex, state->acquire_ctx);
1083 if (ret)
1084 return ERR_PTR(ret);
1085
1086 index = drm_connector_index(connector);
1087
1088 if (index >= state->num_connector) {
1089 struct __drm_connnectors_state *c;
1090 int alloc = max(index + 1, config->num_connector);
1091
1092 c = krealloc_array(state->connectors, alloc,
1093 sizeof(*state->connectors), GFP_KERNEL);
1094 if (!c)
1095 return ERR_PTR(-ENOMEM);
1096
1097 state->connectors = c;
1098 memset(&state->connectors[state->num_connector], 0,
1099 sizeof(*state->connectors) * (alloc - state->num_connector));
1100
1101 state->num_connector = alloc;
1102 }
1103
1104 if (state->connectors[index].state)
1105 return state->connectors[index].state;
1106
1107 connector_state = connector->funcs->atomic_duplicate_state(connector);
1108 if (!connector_state)
1109 return ERR_PTR(-ENOMEM);
1110
1111 drm_connector_get(connector);
1112 state->connectors[index].state = connector_state;
1113 state->connectors[index].old_state = connector->state;
1114 state->connectors[index].new_state = connector_state;
1115 state->connectors[index].ptr = connector;
1116 connector_state->state = state;
1117
1118 drm_dbg_atomic(connector->dev, "Added [CONNECTOR:%d:%s] %p state to %p\n",
1119 connector->base.id, connector->name,
1120 connector_state, state);
1121
1122 if (connector_state->crtc) {
1123 struct drm_crtc_state *crtc_state;
1124
1125 crtc_state = drm_atomic_get_crtc_state(state,
1126 connector_state->crtc);
1127 if (IS_ERR(crtc_state))
1128 return ERR_CAST(crtc_state);
1129 }
1130
1131 return connector_state;
1132}
1133EXPORT_SYMBOL(drm_atomic_get_connector_state);
1134
1135static void drm_atomic_connector_print_state(struct drm_printer *p,
1136 const struct drm_connector_state *state)
1137{
1138 struct drm_connector *connector = state->connector;
1139
1140 drm_printf(p, "connector[%u]: %s\n", connector->base.id, connector->name);
1141 drm_printf(p, "\tcrtc=%s\n", state->crtc ? state->crtc->name : "(null)");
1142 drm_printf(p, "\tself_refresh_aware=%d\n", state->self_refresh_aware);
1143 drm_printf(p, "\tmax_requested_bpc=%d\n", state->max_requested_bpc);
1144 drm_printf(p, "\tcolorspace=%s\n", drm_get_colorspace_name(state->colorspace));
1145
1146 if (connector->connector_type == DRM_MODE_CONNECTOR_WRITEBACK)
1147 if (state->writeback_job && state->writeback_job->fb)
1148 drm_printf(p, "\tfb=%d\n", state->writeback_job->fb->base.id);
1149
1150 if (connector->funcs->atomic_print_state)
1151 connector->funcs->atomic_print_state(p, state);
1152}
1153
1154/**
1155 * drm_atomic_get_bridge_state - get bridge state
1156 * @state: global atomic state object
1157 * @bridge: bridge to get state object for
1158 *
1159 * This function returns the bridge state for the given bridge, allocating it
1160 * if needed. It will also grab the relevant bridge lock to make sure that the
1161 * state is consistent.
1162 *
1163 * Returns:
1164 *
1165 * Either the allocated state or the error code encoded into the pointer. When
1166 * the error is EDEADLK then the w/w mutex code has detected a deadlock and the
1167 * entire atomic sequence must be restarted.
1168 */
1169struct drm_bridge_state *
1170drm_atomic_get_bridge_state(struct drm_atomic_state *state,
1171 struct drm_bridge *bridge)
1172{
1173 struct drm_private_state *obj_state;
1174
1175 obj_state = drm_atomic_get_private_obj_state(state, &bridge->base);
1176 if (IS_ERR(obj_state))
1177 return ERR_CAST(obj_state);
1178
1179 return drm_priv_to_bridge_state(obj_state);
1180}
1181EXPORT_SYMBOL(drm_atomic_get_bridge_state);
1182
1183/**
1184 * drm_atomic_get_old_bridge_state - get old bridge state, if it exists
1185 * @state: global atomic state object
1186 * @bridge: bridge to grab
1187 *
1188 * This function returns the old bridge state for the given bridge, or NULL if
1189 * the bridge is not part of the global atomic state.
1190 */
1191struct drm_bridge_state *
1192drm_atomic_get_old_bridge_state(const struct drm_atomic_state *state,
1193 struct drm_bridge *bridge)
1194{
1195 struct drm_private_state *obj_state;
1196
1197 obj_state = drm_atomic_get_old_private_obj_state(state, &bridge->base);
1198 if (!obj_state)
1199 return NULL;
1200
1201 return drm_priv_to_bridge_state(obj_state);
1202}
1203EXPORT_SYMBOL(drm_atomic_get_old_bridge_state);
1204
1205/**
1206 * drm_atomic_get_new_bridge_state - get new bridge state, if it exists
1207 * @state: global atomic state object
1208 * @bridge: bridge to grab
1209 *
1210 * This function returns the new bridge state for the given bridge, or NULL if
1211 * the bridge is not part of the global atomic state.
1212 */
1213struct drm_bridge_state *
1214drm_atomic_get_new_bridge_state(const struct drm_atomic_state *state,
1215 struct drm_bridge *bridge)
1216{
1217 struct drm_private_state *obj_state;
1218
1219 obj_state = drm_atomic_get_new_private_obj_state(state, &bridge->base);
1220 if (!obj_state)
1221 return NULL;
1222
1223 return drm_priv_to_bridge_state(obj_state);
1224}
1225EXPORT_SYMBOL(drm_atomic_get_new_bridge_state);
1226
1227/**
1228 * drm_atomic_add_encoder_bridges - add bridges attached to an encoder
1229 * @state: atomic state
1230 * @encoder: DRM encoder
1231 *
1232 * This function adds all bridges attached to @encoder. This is needed to add
1233 * bridge states to @state and make them available when
1234 * &drm_bridge_funcs.atomic_check(), &drm_bridge_funcs.atomic_pre_enable(),
1235 * &drm_bridge_funcs.atomic_enable(),
1236 * &drm_bridge_funcs.atomic_disable_post_disable() are called.
1237 *
1238 * Returns:
1239 * 0 on success or can fail with -EDEADLK or -ENOMEM. When the error is EDEADLK
1240 * then the w/w mutex code has detected a deadlock and the entire atomic
1241 * sequence must be restarted. All other errors are fatal.
1242 */
1243int
1244drm_atomic_add_encoder_bridges(struct drm_atomic_state *state,
1245 struct drm_encoder *encoder)
1246{
1247 struct drm_bridge_state *bridge_state;
1248 struct drm_bridge *bridge;
1249
1250 if (!encoder)
1251 return 0;
1252
1253 drm_dbg_atomic(encoder->dev,
1254 "Adding all bridges for [encoder:%d:%s] to %p\n",
1255 encoder->base.id, encoder->name, state);
1256
1257 drm_for_each_bridge_in_chain(encoder, bridge) {
1258 /* Skip bridges that don't implement the atomic state hooks. */
1259 if (!bridge->funcs->atomic_duplicate_state)
1260 continue;
1261
1262 bridge_state = drm_atomic_get_bridge_state(state, bridge);
1263 if (IS_ERR(bridge_state))
1264 return PTR_ERR(bridge_state);
1265 }
1266
1267 return 0;
1268}
1269EXPORT_SYMBOL(drm_atomic_add_encoder_bridges);
1270
1271/**
1272 * drm_atomic_add_affected_connectors - add connectors for CRTC
1273 * @state: atomic state
1274 * @crtc: DRM CRTC
1275 *
1276 * This function walks the current configuration and adds all connectors
1277 * currently using @crtc to the atomic configuration @state. Note that this
1278 * function must acquire the connection mutex. This can potentially cause
1279 * unneeded serialization if the update is just for the planes on one CRTC. Hence
1280 * drivers and helpers should only call this when really needed (e.g. when a
1281 * full modeset needs to happen due to some change).
1282 *
1283 * Returns:
1284 * 0 on success or can fail with -EDEADLK or -ENOMEM. When the error is EDEADLK
1285 * then the w/w mutex code has detected a deadlock and the entire atomic
1286 * sequence must be restarted. All other errors are fatal.
1287 */
1288int
1289drm_atomic_add_affected_connectors(struct drm_atomic_state *state,
1290 struct drm_crtc *crtc)
1291{
1292 struct drm_mode_config *config = &state->dev->mode_config;
1293 struct drm_connector *connector;
1294 struct drm_connector_state *conn_state;
1295 struct drm_connector_list_iter conn_iter;
1296 struct drm_crtc_state *crtc_state;
1297 int ret;
1298
1299 crtc_state = drm_atomic_get_crtc_state(state, crtc);
1300 if (IS_ERR(crtc_state))
1301 return PTR_ERR(crtc_state);
1302
1303 ret = drm_modeset_lock(&config->connection_mutex, state->acquire_ctx);
1304 if (ret)
1305 return ret;
1306
1307 drm_dbg_atomic(crtc->dev,
1308 "Adding all current connectors for [CRTC:%d:%s] to %p\n",
1309 crtc->base.id, crtc->name, state);
1310
1311 /*
1312 * Changed connectors are already in @state, so only need to look
1313 * at the connector_mask in crtc_state.
1314 */
1315 drm_connector_list_iter_begin(state->dev, &conn_iter);
1316 drm_for_each_connector_iter(connector, &conn_iter) {
1317 if (!(crtc_state->connector_mask & drm_connector_mask(connector)))
1318 continue;
1319
1320 conn_state = drm_atomic_get_connector_state(state, connector);
1321 if (IS_ERR(conn_state)) {
1322 drm_connector_list_iter_end(&conn_iter);
1323 return PTR_ERR(conn_state);
1324 }
1325 }
1326 drm_connector_list_iter_end(&conn_iter);
1327
1328 return 0;
1329}
1330EXPORT_SYMBOL(drm_atomic_add_affected_connectors);
1331
1332/**
1333 * drm_atomic_add_affected_planes - add planes for CRTC
1334 * @state: atomic state
1335 * @crtc: DRM CRTC
1336 *
1337 * This function walks the current configuration and adds all planes
1338 * currently used by @crtc to the atomic configuration @state. This is useful
1339 * when an atomic commit also needs to check all currently enabled plane on
1340 * @crtc, e.g. when changing the mode. It's also useful when re-enabling a CRTC
1341 * to avoid special code to force-enable all planes.
1342 *
1343 * Since acquiring a plane state will always also acquire the w/w mutex of the
1344 * current CRTC for that plane (if there is any) adding all the plane states for
1345 * a CRTC will not reduce parallelism of atomic updates.
1346 *
1347 * Returns:
1348 * 0 on success or can fail with -EDEADLK or -ENOMEM. When the error is EDEADLK
1349 * then the w/w mutex code has detected a deadlock and the entire atomic
1350 * sequence must be restarted. All other errors are fatal.
1351 */
1352int
1353drm_atomic_add_affected_planes(struct drm_atomic_state *state,
1354 struct drm_crtc *crtc)
1355{
1356 const struct drm_crtc_state *old_crtc_state =
1357 drm_atomic_get_old_crtc_state(state, crtc);
1358 struct drm_plane *plane;
1359
1360 WARN_ON(!drm_atomic_get_new_crtc_state(state, crtc));
1361
1362 drm_dbg_atomic(crtc->dev,
1363 "Adding all current planes for [CRTC:%d:%s] to %p\n",
1364 crtc->base.id, crtc->name, state);
1365
1366 drm_for_each_plane_mask(plane, state->dev, old_crtc_state->plane_mask) {
1367 struct drm_plane_state *plane_state =
1368 drm_atomic_get_plane_state(state, plane);
1369
1370 if (IS_ERR(plane_state))
1371 return PTR_ERR(plane_state);
1372 }
1373 return 0;
1374}
1375EXPORT_SYMBOL(drm_atomic_add_affected_planes);
1376
1377/**
1378 * drm_atomic_check_only - check whether a given config would work
1379 * @state: atomic configuration to check
1380 *
1381 * Note that this function can return -EDEADLK if the driver needed to acquire
1382 * more locks but encountered a deadlock. The caller must then do the usual w/w
1383 * backoff dance and restart. All other errors are fatal.
1384 *
1385 * Returns:
1386 * 0 on success, negative error code on failure.
1387 */
1388int drm_atomic_check_only(struct drm_atomic_state *state)
1389{
1390 struct drm_device *dev = state->dev;
1391 struct drm_mode_config *config = &dev->mode_config;
1392 struct drm_plane *plane;
1393 struct drm_plane_state *old_plane_state;
1394 struct drm_plane_state *new_plane_state;
1395 struct drm_crtc *crtc;
1396 struct drm_crtc_state *old_crtc_state;
1397 struct drm_crtc_state *new_crtc_state;
1398 struct drm_connector *conn;
1399 struct drm_connector_state *conn_state;
1400 unsigned int requested_crtc = 0;
1401 unsigned int affected_crtc = 0;
1402 int i, ret = 0;
1403
1404 drm_dbg_atomic(dev, "checking %p\n", state);
1405
1406 for_each_new_crtc_in_state(state, crtc, new_crtc_state, i) {
1407 if (new_crtc_state->enable)
1408 requested_crtc |= drm_crtc_mask(crtc);
1409 }
1410
1411 for_each_oldnew_plane_in_state(state, plane, old_plane_state, new_plane_state, i) {
1412 ret = drm_atomic_plane_check(old_plane_state, new_plane_state);
1413 if (ret) {
1414 drm_dbg_atomic(dev, "[PLANE:%d:%s] atomic core check failed\n",
1415 plane->base.id, plane->name);
1416 return ret;
1417 }
1418 }
1419
1420 for_each_oldnew_crtc_in_state(state, crtc, old_crtc_state, new_crtc_state, i) {
1421 ret = drm_atomic_crtc_check(old_crtc_state, new_crtc_state);
1422 if (ret) {
1423 drm_dbg_atomic(dev, "[CRTC:%d:%s] atomic core check failed\n",
1424 crtc->base.id, crtc->name);
1425 return ret;
1426 }
1427 }
1428
1429 for_each_new_connector_in_state(state, conn, conn_state, i) {
1430 ret = drm_atomic_connector_check(conn, conn_state);
1431 if (ret) {
1432 drm_dbg_atomic(dev, "[CONNECTOR:%d:%s] atomic core check failed\n",
1433 conn->base.id, conn->name);
1434 return ret;
1435 }
1436 }
1437
1438 if (config->funcs->atomic_check) {
1439 ret = config->funcs->atomic_check(state->dev, state);
1440
1441 if (ret) {
1442 drm_dbg_atomic(dev, "atomic driver check for %p failed: %d\n",
1443 state, ret);
1444 return ret;
1445 }
1446 }
1447
1448 if (!state->allow_modeset) {
1449 for_each_new_crtc_in_state(state, crtc, new_crtc_state, i) {
1450 if (drm_atomic_crtc_needs_modeset(new_crtc_state)) {
1451 drm_dbg_atomic(dev, "[CRTC:%d:%s] requires full modeset\n",
1452 crtc->base.id, crtc->name);
1453 return -EINVAL;
1454 }
1455 }
1456 }
1457
1458 for_each_new_crtc_in_state(state, crtc, new_crtc_state, i) {
1459 if (new_crtc_state->enable)
1460 affected_crtc |= drm_crtc_mask(crtc);
1461 }
1462
1463 /*
1464 * For commits that allow modesets drivers can add other CRTCs to the
1465 * atomic commit, e.g. when they need to reallocate global resources.
1466 * This can cause spurious EBUSY, which robs compositors of a very
1467 * effective sanity check for their drawing loop. Therefor only allow
1468 * drivers to add unrelated CRTC states for modeset commits.
1469 *
1470 * FIXME: Should add affected_crtc mask to the ATOMIC IOCTL as an output
1471 * so compositors know what's going on.
1472 */
1473 if (affected_crtc != requested_crtc) {
1474 drm_dbg_atomic(dev,
1475 "driver added CRTC to commit: requested 0x%x, affected 0x%0x\n",
1476 requested_crtc, affected_crtc);
1477 WARN(!state->allow_modeset, "adding CRTC not allowed without modesets: requested 0x%x, affected 0x%0x\n",
1478 requested_crtc, affected_crtc);
1479 }
1480
1481 return 0;
1482}
1483EXPORT_SYMBOL(drm_atomic_check_only);
1484
1485/**
1486 * drm_atomic_commit - commit configuration atomically
1487 * @state: atomic configuration to check
1488 *
1489 * Note that this function can return -EDEADLK if the driver needed to acquire
1490 * more locks but encountered a deadlock. The caller must then do the usual w/w
1491 * backoff dance and restart. All other errors are fatal.
1492 *
1493 * This function will take its own reference on @state.
1494 * Callers should always release their reference with drm_atomic_state_put().
1495 *
1496 * Returns:
1497 * 0 on success, negative error code on failure.
1498 */
1499int drm_atomic_commit(struct drm_atomic_state *state)
1500{
1501 struct drm_mode_config *config = &state->dev->mode_config;
1502 struct drm_printer p = drm_info_printer(state->dev->dev);
1503 int ret;
1504
1505 if (drm_debug_enabled(DRM_UT_STATE))
1506 drm_atomic_print_new_state(state, &p);
1507
1508 ret = drm_atomic_check_only(state);
1509 if (ret)
1510 return ret;
1511
1512 drm_dbg_atomic(state->dev, "committing %p\n", state);
1513
1514 return config->funcs->atomic_commit(state->dev, state, false);
1515}
1516EXPORT_SYMBOL(drm_atomic_commit);
1517
1518/**
1519 * drm_atomic_nonblocking_commit - atomic nonblocking commit
1520 * @state: atomic configuration to check
1521 *
1522 * Note that this function can return -EDEADLK if the driver needed to acquire
1523 * more locks but encountered a deadlock. The caller must then do the usual w/w
1524 * backoff dance and restart. All other errors are fatal.
1525 *
1526 * This function will take its own reference on @state.
1527 * Callers should always release their reference with drm_atomic_state_put().
1528 *
1529 * Returns:
1530 * 0 on success, negative error code on failure.
1531 */
1532int drm_atomic_nonblocking_commit(struct drm_atomic_state *state)
1533{
1534 struct drm_mode_config *config = &state->dev->mode_config;
1535 int ret;
1536
1537 ret = drm_atomic_check_only(state);
1538 if (ret)
1539 return ret;
1540
1541 drm_dbg_atomic(state->dev, "committing %p nonblocking\n", state);
1542
1543 return config->funcs->atomic_commit(state->dev, state, true);
1544}
1545EXPORT_SYMBOL(drm_atomic_nonblocking_commit);
1546
1547/* just used from drm-client and atomic-helper: */
1548int __drm_atomic_helper_disable_plane(struct drm_plane *plane,
1549 struct drm_plane_state *plane_state)
1550{
1551 int ret;
1552
1553 ret = drm_atomic_set_crtc_for_plane(plane_state, NULL);
1554 if (ret != 0)
1555 return ret;
1556
1557 drm_atomic_set_fb_for_plane(plane_state, NULL);
1558 plane_state->crtc_x = 0;
1559 plane_state->crtc_y = 0;
1560 plane_state->crtc_w = 0;
1561 plane_state->crtc_h = 0;
1562 plane_state->src_x = 0;
1563 plane_state->src_y = 0;
1564 plane_state->src_w = 0;
1565 plane_state->src_h = 0;
1566
1567 return 0;
1568}
1569EXPORT_SYMBOL(__drm_atomic_helper_disable_plane);
1570
1571static int update_output_state(struct drm_atomic_state *state,
1572 struct drm_mode_set *set)
1573{
1574 struct drm_device *dev = set->crtc->dev;
1575 struct drm_crtc *crtc;
1576 struct drm_crtc_state *new_crtc_state;
1577 struct drm_connector *connector;
1578 struct drm_connector_state *new_conn_state;
1579 int ret, i;
1580
1581 ret = drm_modeset_lock(&dev->mode_config.connection_mutex,
1582 state->acquire_ctx);
1583 if (ret)
1584 return ret;
1585
1586 /* First disable all connectors on the target crtc. */
1587 ret = drm_atomic_add_affected_connectors(state, set->crtc);
1588 if (ret)
1589 return ret;
1590
1591 for_each_new_connector_in_state(state, connector, new_conn_state, i) {
1592 if (new_conn_state->crtc == set->crtc) {
1593 ret = drm_atomic_set_crtc_for_connector(new_conn_state,
1594 NULL);
1595 if (ret)
1596 return ret;
1597
1598 /* Make sure legacy setCrtc always re-trains */
1599 new_conn_state->link_status = DRM_LINK_STATUS_GOOD;
1600 }
1601 }
1602
1603 /* Then set all connectors from set->connectors on the target crtc */
1604 for (i = 0; i < set->num_connectors; i++) {
1605 new_conn_state = drm_atomic_get_connector_state(state,
1606 set->connectors[i]);
1607 if (IS_ERR(new_conn_state))
1608 return PTR_ERR(new_conn_state);
1609
1610 ret = drm_atomic_set_crtc_for_connector(new_conn_state,
1611 set->crtc);
1612 if (ret)
1613 return ret;
1614 }
1615
1616 for_each_new_crtc_in_state(state, crtc, new_crtc_state, i) {
1617 /*
1618 * Don't update ->enable for the CRTC in the set_config request,
1619 * since a mismatch would indicate a bug in the upper layers.
1620 * The actual modeset code later on will catch any
1621 * inconsistencies here.
1622 */
1623 if (crtc == set->crtc)
1624 continue;
1625
1626 if (!new_crtc_state->connector_mask) {
1627 ret = drm_atomic_set_mode_prop_for_crtc(new_crtc_state,
1628 NULL);
1629 if (ret < 0)
1630 return ret;
1631
1632 new_crtc_state->active = false;
1633 }
1634 }
1635
1636 return 0;
1637}
1638
1639/* just used from drm-client and atomic-helper: */
1640int __drm_atomic_helper_set_config(struct drm_mode_set *set,
1641 struct drm_atomic_state *state)
1642{
1643 struct drm_crtc_state *crtc_state;
1644 struct drm_plane_state *primary_state;
1645 struct drm_crtc *crtc = set->crtc;
1646 int hdisplay, vdisplay;
1647 int ret;
1648
1649 crtc_state = drm_atomic_get_crtc_state(state, crtc);
1650 if (IS_ERR(crtc_state))
1651 return PTR_ERR(crtc_state);
1652
1653 primary_state = drm_atomic_get_plane_state(state, crtc->primary);
1654 if (IS_ERR(primary_state))
1655 return PTR_ERR(primary_state);
1656
1657 if (!set->mode) {
1658 WARN_ON(set->fb);
1659 WARN_ON(set->num_connectors);
1660
1661 ret = drm_atomic_set_mode_for_crtc(crtc_state, NULL);
1662 if (ret != 0)
1663 return ret;
1664
1665 crtc_state->active = false;
1666
1667 ret = drm_atomic_set_crtc_for_plane(primary_state, NULL);
1668 if (ret != 0)
1669 return ret;
1670
1671 drm_atomic_set_fb_for_plane(primary_state, NULL);
1672
1673 goto commit;
1674 }
1675
1676 WARN_ON(!set->fb);
1677 WARN_ON(!set->num_connectors);
1678
1679 ret = drm_atomic_set_mode_for_crtc(crtc_state, set->mode);
1680 if (ret != 0)
1681 return ret;
1682
1683 crtc_state->active = true;
1684
1685 ret = drm_atomic_set_crtc_for_plane(primary_state, crtc);
1686 if (ret != 0)
1687 return ret;
1688
1689 drm_mode_get_hv_timing(set->mode, &hdisplay, &vdisplay);
1690
1691 drm_atomic_set_fb_for_plane(primary_state, set->fb);
1692 primary_state->crtc_x = 0;
1693 primary_state->crtc_y = 0;
1694 primary_state->crtc_w = hdisplay;
1695 primary_state->crtc_h = vdisplay;
1696 primary_state->src_x = set->x << 16;
1697 primary_state->src_y = set->y << 16;
1698 if (drm_rotation_90_or_270(primary_state->rotation)) {
1699 primary_state->src_w = vdisplay << 16;
1700 primary_state->src_h = hdisplay << 16;
1701 } else {
1702 primary_state->src_w = hdisplay << 16;
1703 primary_state->src_h = vdisplay << 16;
1704 }
1705
1706commit:
1707 ret = update_output_state(state, set);
1708 if (ret)
1709 return ret;
1710
1711 return 0;
1712}
1713EXPORT_SYMBOL(__drm_atomic_helper_set_config);
1714
1715static void drm_atomic_private_obj_print_state(struct drm_printer *p,
1716 const struct drm_private_state *state)
1717{
1718 struct drm_private_obj *obj = state->obj;
1719
1720 if (obj->funcs->atomic_print_state)
1721 obj->funcs->atomic_print_state(p, state);
1722}
1723
1724/**
1725 * drm_atomic_print_new_state - prints drm atomic state
1726 * @state: atomic configuration to check
1727 * @p: drm printer
1728 *
1729 * This functions prints the drm atomic state snapshot using the drm printer
1730 * which is passed to it. This snapshot can be used for debugging purposes.
1731 *
1732 * Note that this function looks into the new state objects and hence its not
1733 * safe to be used after the call to drm_atomic_helper_commit_hw_done().
1734 */
1735void drm_atomic_print_new_state(const struct drm_atomic_state *state,
1736 struct drm_printer *p)
1737{
1738 struct drm_plane *plane;
1739 struct drm_plane_state *plane_state;
1740 struct drm_crtc *crtc;
1741 struct drm_crtc_state *crtc_state;
1742 struct drm_connector *connector;
1743 struct drm_connector_state *connector_state;
1744 struct drm_private_obj *obj;
1745 struct drm_private_state *obj_state;
1746 int i;
1747
1748 if (!p) {
1749 drm_err(state->dev, "invalid drm printer\n");
1750 return;
1751 }
1752
1753 drm_dbg_atomic(state->dev, "checking %p\n", state);
1754
1755 for_each_new_plane_in_state(state, plane, plane_state, i)
1756 drm_atomic_plane_print_state(p, plane_state);
1757
1758 for_each_new_crtc_in_state(state, crtc, crtc_state, i)
1759 drm_atomic_crtc_print_state(p, crtc_state);
1760
1761 for_each_new_connector_in_state(state, connector, connector_state, i)
1762 drm_atomic_connector_print_state(p, connector_state);
1763
1764 for_each_new_private_obj_in_state(state, obj, obj_state, i)
1765 drm_atomic_private_obj_print_state(p, obj_state);
1766}
1767EXPORT_SYMBOL(drm_atomic_print_new_state);
1768
1769static void __drm_state_dump(struct drm_device *dev, struct drm_printer *p,
1770 bool take_locks)
1771{
1772 struct drm_mode_config *config = &dev->mode_config;
1773 struct drm_plane *plane;
1774 struct drm_crtc *crtc;
1775 struct drm_connector *connector;
1776 struct drm_connector_list_iter conn_iter;
1777 struct drm_private_obj *obj;
1778
1779 if (!drm_drv_uses_atomic_modeset(dev))
1780 return;
1781
1782 list_for_each_entry(plane, &config->plane_list, head) {
1783 if (take_locks)
1784 drm_modeset_lock(&plane->mutex, NULL);
1785 drm_atomic_plane_print_state(p, plane->state);
1786 if (take_locks)
1787 drm_modeset_unlock(&plane->mutex);
1788 }
1789
1790 list_for_each_entry(crtc, &config->crtc_list, head) {
1791 if (take_locks)
1792 drm_modeset_lock(&crtc->mutex, NULL);
1793 drm_atomic_crtc_print_state(p, crtc->state);
1794 if (take_locks)
1795 drm_modeset_unlock(&crtc->mutex);
1796 }
1797
1798 drm_connector_list_iter_begin(dev, &conn_iter);
1799 if (take_locks)
1800 drm_modeset_lock(&dev->mode_config.connection_mutex, NULL);
1801 drm_for_each_connector_iter(connector, &conn_iter)
1802 drm_atomic_connector_print_state(p, connector->state);
1803 if (take_locks)
1804 drm_modeset_unlock(&dev->mode_config.connection_mutex);
1805 drm_connector_list_iter_end(&conn_iter);
1806
1807 list_for_each_entry(obj, &config->privobj_list, head) {
1808 if (take_locks)
1809 drm_modeset_lock(&obj->lock, NULL);
1810 drm_atomic_private_obj_print_state(p, obj->state);
1811 if (take_locks)
1812 drm_modeset_unlock(&obj->lock);
1813 }
1814}
1815
1816/**
1817 * drm_state_dump - dump entire device atomic state
1818 * @dev: the drm device
1819 * @p: where to print the state to
1820 *
1821 * Just for debugging. Drivers might want an option to dump state
1822 * to dmesg in case of error irq's. (Hint, you probably want to
1823 * ratelimit this!)
1824 *
1825 * The caller must wrap this drm_modeset_lock_all_ctx() and
1826 * drm_modeset_drop_locks(). If this is called from error irq handler, it should
1827 * not be enabled by default - if you are debugging errors you might
1828 * not care that this is racey, but calling this without all modeset locks held
1829 * is inherently unsafe.
1830 */
1831void drm_state_dump(struct drm_device *dev, struct drm_printer *p)
1832{
1833 __drm_state_dump(dev, p, false);
1834}
1835EXPORT_SYMBOL(drm_state_dump);
1836
1837#ifdef CONFIG_DEBUG_FS
1838static int drm_state_info(struct seq_file *m, void *data)
1839{
1840 struct drm_debugfs_entry *entry = m->private;
1841 struct drm_device *dev = entry->dev;
1842 struct drm_printer p = drm_seq_file_printer(m);
1843
1844 __drm_state_dump(dev, &p, true);
1845
1846 return 0;
1847}
1848
1849/* any use in debugfs files to dump individual planes/crtc/etc? */
1850static const struct drm_debugfs_info drm_atomic_debugfs_list[] = {
1851 {"state", drm_state_info, 0},
1852};
1853
1854void drm_atomic_debugfs_init(struct drm_device *dev)
1855{
1856 drm_debugfs_add_files(dev, drm_atomic_debugfs_list,
1857 ARRAY_SIZE(drm_atomic_debugfs_list));
1858}
1859#endif