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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 *
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_print.h>
33#include <linux/sync_file.h>
34
35#include "drm_crtc_internal.h"
36#include "drm_internal.h"
37
38void __drm_crtc_commit_free(struct kref *kref)
39{
40 struct drm_crtc_commit *commit =
41 container_of(kref, struct drm_crtc_commit, ref);
42
43 kfree(commit);
44}
45EXPORT_SYMBOL(__drm_crtc_commit_free);
46
47/**
48 * drm_atomic_state_default_release -
49 * release memory initialized by drm_atomic_state_init
50 * @state: atomic state
51 *
52 * Free all the memory allocated by drm_atomic_state_init.
53 * This should only be used by drivers which are still subclassing
54 * &drm_atomic_state and haven't switched to &drm_private_state yet.
55 */
56void drm_atomic_state_default_release(struct drm_atomic_state *state)
57{
58 kfree(state->connectors);
59 kfree(state->crtcs);
60 kfree(state->planes);
61 kfree(state->private_objs);
62}
63EXPORT_SYMBOL(drm_atomic_state_default_release);
64
65/**
66 * drm_atomic_state_init - init new atomic state
67 * @dev: DRM device
68 * @state: atomic state
69 *
70 * Default implementation for filling in a new atomic state.
71 * This should only be used by drivers which are still subclassing
72 * &drm_atomic_state and haven't switched to &drm_private_state yet.
73 */
74int
75drm_atomic_state_init(struct drm_device *dev, struct drm_atomic_state *state)
76{
77 kref_init(&state->ref);
78
79 /* TODO legacy paths should maybe do a better job about
80 * setting this appropriately?
81 */
82 state->allow_modeset = true;
83
84 state->crtcs = kcalloc(dev->mode_config.num_crtc,
85 sizeof(*state->crtcs), GFP_KERNEL);
86 if (!state->crtcs)
87 goto fail;
88 state->planes = kcalloc(dev->mode_config.num_total_plane,
89 sizeof(*state->planes), GFP_KERNEL);
90 if (!state->planes)
91 goto fail;
92
93 state->dev = dev;
94
95 DRM_DEBUG_ATOMIC("Allocated atomic state %p\n", state);
96
97 return 0;
98fail:
99 drm_atomic_state_default_release(state);
100 return -ENOMEM;
101}
102EXPORT_SYMBOL(drm_atomic_state_init);
103
104/**
105 * drm_atomic_state_alloc - allocate atomic state
106 * @dev: DRM device
107 *
108 * This allocates an empty atomic state to track updates.
109 */
110struct drm_atomic_state *
111drm_atomic_state_alloc(struct drm_device *dev)
112{
113 struct drm_mode_config *config = &dev->mode_config;
114
115 if (!config->funcs->atomic_state_alloc) {
116 struct drm_atomic_state *state;
117
118 state = kzalloc(sizeof(*state), GFP_KERNEL);
119 if (!state)
120 return NULL;
121 if (drm_atomic_state_init(dev, state) < 0) {
122 kfree(state);
123 return NULL;
124 }
125 return state;
126 }
127
128 return config->funcs->atomic_state_alloc(dev);
129}
130EXPORT_SYMBOL(drm_atomic_state_alloc);
131
132/**
133 * drm_atomic_state_default_clear - clear base atomic state
134 * @state: atomic state
135 *
136 * Default implementation for clearing atomic state.
137 * This should only be used by drivers which are still subclassing
138 * &drm_atomic_state and haven't switched to &drm_private_state yet.
139 */
140void drm_atomic_state_default_clear(struct drm_atomic_state *state)
141{
142 struct drm_device *dev = state->dev;
143 struct drm_mode_config *config = &dev->mode_config;
144 int i;
145
146 DRM_DEBUG_ATOMIC("Clearing atomic state %p\n", state);
147
148 for (i = 0; i < state->num_connector; i++) {
149 struct drm_connector *connector = state->connectors[i].ptr;
150
151 if (!connector)
152 continue;
153
154 connector->funcs->atomic_destroy_state(connector,
155 state->connectors[i].state);
156 state->connectors[i].ptr = NULL;
157 state->connectors[i].state = NULL;
158 state->connectors[i].old_state = NULL;
159 state->connectors[i].new_state = NULL;
160 drm_connector_put(connector);
161 }
162
163 for (i = 0; i < config->num_crtc; i++) {
164 struct drm_crtc *crtc = state->crtcs[i].ptr;
165
166 if (!crtc)
167 continue;
168
169 crtc->funcs->atomic_destroy_state(crtc,
170 state->crtcs[i].state);
171
172 state->crtcs[i].ptr = NULL;
173 state->crtcs[i].state = NULL;
174 state->crtcs[i].old_state = NULL;
175 state->crtcs[i].new_state = NULL;
176 }
177
178 for (i = 0; i < config->num_total_plane; i++) {
179 struct drm_plane *plane = state->planes[i].ptr;
180
181 if (!plane)
182 continue;
183
184 plane->funcs->atomic_destroy_state(plane,
185 state->planes[i].state);
186 state->planes[i].ptr = NULL;
187 state->planes[i].state = NULL;
188 state->planes[i].old_state = NULL;
189 state->planes[i].new_state = NULL;
190 }
191
192 for (i = 0; i < state->num_private_objs; i++) {
193 struct drm_private_obj *obj = state->private_objs[i].ptr;
194
195 obj->funcs->atomic_destroy_state(obj,
196 state->private_objs[i].state);
197 state->private_objs[i].ptr = NULL;
198 state->private_objs[i].state = NULL;
199 state->private_objs[i].old_state = NULL;
200 state->private_objs[i].new_state = NULL;
201 }
202 state->num_private_objs = 0;
203
204 if (state->fake_commit) {
205 drm_crtc_commit_put(state->fake_commit);
206 state->fake_commit = NULL;
207 }
208}
209EXPORT_SYMBOL(drm_atomic_state_default_clear);
210
211/**
212 * drm_atomic_state_clear - clear state object
213 * @state: atomic state
214 *
215 * When the w/w mutex algorithm detects a deadlock we need to back off and drop
216 * all locks. So someone else could sneak in and change the current modeset
217 * configuration. Which means that all the state assembled in @state is no
218 * longer an atomic update to the current state, but to some arbitrary earlier
219 * state. Which could break assumptions the driver's
220 * &drm_mode_config_funcs.atomic_check likely relies on.
221 *
222 * Hence we must clear all cached state and completely start over, using this
223 * function.
224 */
225void drm_atomic_state_clear(struct drm_atomic_state *state)
226{
227 struct drm_device *dev = state->dev;
228 struct drm_mode_config *config = &dev->mode_config;
229
230 if (config->funcs->atomic_state_clear)
231 config->funcs->atomic_state_clear(state);
232 else
233 drm_atomic_state_default_clear(state);
234}
235EXPORT_SYMBOL(drm_atomic_state_clear);
236
237/**
238 * __drm_atomic_state_free - free all memory for an atomic state
239 * @ref: This atomic state to deallocate
240 *
241 * This frees all memory associated with an atomic state, including all the
242 * per-object state for planes, crtcs and connectors.
243 */
244void __drm_atomic_state_free(struct kref *ref)
245{
246 struct drm_atomic_state *state = container_of(ref, typeof(*state), ref);
247 struct drm_mode_config *config = &state->dev->mode_config;
248
249 drm_atomic_state_clear(state);
250
251 DRM_DEBUG_ATOMIC("Freeing atomic state %p\n", state);
252
253 if (config->funcs->atomic_state_free) {
254 config->funcs->atomic_state_free(state);
255 } else {
256 drm_atomic_state_default_release(state);
257 kfree(state);
258 }
259}
260EXPORT_SYMBOL(__drm_atomic_state_free);
261
262/**
263 * drm_atomic_get_crtc_state - get crtc state
264 * @state: global atomic state object
265 * @crtc: crtc to get state object for
266 *
267 * This function returns the crtc state for the given crtc, allocating it if
268 * needed. It will also grab the relevant crtc lock to make sure that the state
269 * is consistent.
270 *
271 * Returns:
272 *
273 * Either the allocated state or the error code encoded into the pointer. When
274 * the error is EDEADLK then the w/w mutex code has detected a deadlock and the
275 * entire atomic sequence must be restarted. All other errors are fatal.
276 */
277struct drm_crtc_state *
278drm_atomic_get_crtc_state(struct drm_atomic_state *state,
279 struct drm_crtc *crtc)
280{
281 int ret, index = drm_crtc_index(crtc);
282 struct drm_crtc_state *crtc_state;
283
284 WARN_ON(!state->acquire_ctx);
285
286 crtc_state = drm_atomic_get_existing_crtc_state(state, crtc);
287 if (crtc_state)
288 return crtc_state;
289
290 ret = drm_modeset_lock(&crtc->mutex, state->acquire_ctx);
291 if (ret)
292 return ERR_PTR(ret);
293
294 crtc_state = crtc->funcs->atomic_duplicate_state(crtc);
295 if (!crtc_state)
296 return ERR_PTR(-ENOMEM);
297
298 state->crtcs[index].state = crtc_state;
299 state->crtcs[index].old_state = crtc->state;
300 state->crtcs[index].new_state = crtc_state;
301 state->crtcs[index].ptr = crtc;
302 crtc_state->state = state;
303
304 DRM_DEBUG_ATOMIC("Added [CRTC:%d:%s] %p state to %p\n",
305 crtc->base.id, crtc->name, crtc_state, state);
306
307 return crtc_state;
308}
309EXPORT_SYMBOL(drm_atomic_get_crtc_state);
310
311static void set_out_fence_for_crtc(struct drm_atomic_state *state,
312 struct drm_crtc *crtc, s32 __user *fence_ptr)
313{
314 state->crtcs[drm_crtc_index(crtc)].out_fence_ptr = fence_ptr;
315}
316
317static s32 __user *get_out_fence_for_crtc(struct drm_atomic_state *state,
318 struct drm_crtc *crtc)
319{
320 s32 __user *fence_ptr;
321
322 fence_ptr = state->crtcs[drm_crtc_index(crtc)].out_fence_ptr;
323 state->crtcs[drm_crtc_index(crtc)].out_fence_ptr = NULL;
324
325 return fence_ptr;
326}
327
328/**
329 * drm_atomic_set_mode_for_crtc - set mode for CRTC
330 * @state: the CRTC whose incoming state to update
331 * @mode: kernel-internal mode to use for the CRTC, or NULL to disable
332 *
333 * Set a mode (originating from the kernel) on the desired CRTC state and update
334 * the enable property.
335 *
336 * RETURNS:
337 * Zero on success, error code on failure. Cannot return -EDEADLK.
338 */
339int drm_atomic_set_mode_for_crtc(struct drm_crtc_state *state,
340 const struct drm_display_mode *mode)
341{
342 struct drm_mode_modeinfo umode;
343
344 /* Early return for no change. */
345 if (mode && memcmp(&state->mode, mode, sizeof(*mode)) == 0)
346 return 0;
347
348 drm_property_blob_put(state->mode_blob);
349 state->mode_blob = NULL;
350
351 if (mode) {
352 drm_mode_convert_to_umode(&umode, mode);
353 state->mode_blob =
354 drm_property_create_blob(state->crtc->dev,
355 sizeof(umode),
356 &umode);
357 if (IS_ERR(state->mode_blob))
358 return PTR_ERR(state->mode_blob);
359
360 drm_mode_copy(&state->mode, mode);
361 state->enable = true;
362 DRM_DEBUG_ATOMIC("Set [MODE:%s] for CRTC state %p\n",
363 mode->name, state);
364 } else {
365 memset(&state->mode, 0, sizeof(state->mode));
366 state->enable = false;
367 DRM_DEBUG_ATOMIC("Set [NOMODE] for CRTC state %p\n",
368 state);
369 }
370
371 return 0;
372}
373EXPORT_SYMBOL(drm_atomic_set_mode_for_crtc);
374
375/**
376 * drm_atomic_set_mode_prop_for_crtc - set mode for CRTC
377 * @state: the CRTC whose incoming state to update
378 * @blob: pointer to blob property to use for mode
379 *
380 * Set a mode (originating from a blob property) on the desired CRTC state.
381 * This function will take a reference on the blob property for the CRTC state,
382 * and release the reference held on the state's existing mode property, if any
383 * was set.
384 *
385 * RETURNS:
386 * Zero on success, error code on failure. Cannot return -EDEADLK.
387 */
388int drm_atomic_set_mode_prop_for_crtc(struct drm_crtc_state *state,
389 struct drm_property_blob *blob)
390{
391 if (blob == state->mode_blob)
392 return 0;
393
394 drm_property_blob_put(state->mode_blob);
395 state->mode_blob = NULL;
396
397 memset(&state->mode, 0, sizeof(state->mode));
398
399 if (blob) {
400 if (blob->length != sizeof(struct drm_mode_modeinfo) ||
401 drm_mode_convert_umode(state->crtc->dev, &state->mode,
402 blob->data))
403 return -EINVAL;
404
405 state->mode_blob = drm_property_blob_get(blob);
406 state->enable = true;
407 DRM_DEBUG_ATOMIC("Set [MODE:%s] for CRTC state %p\n",
408 state->mode.name, state);
409 } else {
410 state->enable = false;
411 DRM_DEBUG_ATOMIC("Set [NOMODE] for CRTC state %p\n",
412 state);
413 }
414
415 return 0;
416}
417EXPORT_SYMBOL(drm_atomic_set_mode_prop_for_crtc);
418
419/**
420 * drm_atomic_replace_property_blob_from_id - lookup the new blob and replace the old one with it
421 * @dev: DRM device
422 * @blob: a pointer to the member blob to be replaced
423 * @blob_id: ID of the new blob
424 * @expected_size: total expected size of the blob data (in bytes)
425 * @expected_elem_size: expected element size of the blob data (in bytes)
426 * @replaced: did the blob get replaced?
427 *
428 * Replace @blob with another blob with the ID @blob_id. If @blob_id is zero
429 * @blob becomes NULL.
430 *
431 * If @expected_size is positive the new blob length is expected to be equal
432 * to @expected_size bytes. If @expected_elem_size is positive the new blob
433 * length is expected to be a multiple of @expected_elem_size bytes. Otherwise
434 * an error is returned.
435 *
436 * @replaced will indicate to the caller whether the blob was replaced or not.
437 * If the old and new blobs were in fact the same blob @replaced will be false
438 * otherwise it will be true.
439 *
440 * RETURNS:
441 * Zero on success, error code on failure.
442 */
443static int
444drm_atomic_replace_property_blob_from_id(struct drm_device *dev,
445 struct drm_property_blob **blob,
446 uint64_t blob_id,
447 ssize_t expected_size,
448 ssize_t expected_elem_size,
449 bool *replaced)
450{
451 struct drm_property_blob *new_blob = NULL;
452
453 if (blob_id != 0) {
454 new_blob = drm_property_lookup_blob(dev, blob_id);
455 if (new_blob == NULL)
456 return -EINVAL;
457
458 if (expected_size > 0 &&
459 new_blob->length != expected_size) {
460 drm_property_blob_put(new_blob);
461 return -EINVAL;
462 }
463 if (expected_elem_size > 0 &&
464 new_blob->length % expected_elem_size != 0) {
465 drm_property_blob_put(new_blob);
466 return -EINVAL;
467 }
468 }
469
470 *replaced |= drm_property_replace_blob(blob, new_blob);
471 drm_property_blob_put(new_blob);
472
473 return 0;
474}
475
476/**
477 * drm_atomic_crtc_set_property - set property on CRTC
478 * @crtc: the drm CRTC to set a property on
479 * @state: the state object to update with the new property value
480 * @property: the property to set
481 * @val: the new property value
482 *
483 * This function handles generic/core properties and calls out to driver's
484 * &drm_crtc_funcs.atomic_set_property for driver properties. To ensure
485 * consistent behavior you must call this function rather than the driver hook
486 * directly.
487 *
488 * RETURNS:
489 * Zero on success, error code on failure
490 */
491int drm_atomic_crtc_set_property(struct drm_crtc *crtc,
492 struct drm_crtc_state *state, struct drm_property *property,
493 uint64_t val)
494{
495 struct drm_device *dev = crtc->dev;
496 struct drm_mode_config *config = &dev->mode_config;
497 bool replaced = false;
498 int ret;
499
500 if (property == config->prop_active)
501 state->active = val;
502 else if (property == config->prop_mode_id) {
503 struct drm_property_blob *mode =
504 drm_property_lookup_blob(dev, val);
505 ret = drm_atomic_set_mode_prop_for_crtc(state, mode);
506 drm_property_blob_put(mode);
507 return ret;
508 } else if (property == config->degamma_lut_property) {
509 ret = drm_atomic_replace_property_blob_from_id(dev,
510 &state->degamma_lut,
511 val,
512 -1, sizeof(struct drm_color_lut),
513 &replaced);
514 state->color_mgmt_changed |= replaced;
515 return ret;
516 } else if (property == config->ctm_property) {
517 ret = drm_atomic_replace_property_blob_from_id(dev,
518 &state->ctm,
519 val,
520 sizeof(struct drm_color_ctm), -1,
521 &replaced);
522 state->color_mgmt_changed |= replaced;
523 return ret;
524 } else if (property == config->gamma_lut_property) {
525 ret = drm_atomic_replace_property_blob_from_id(dev,
526 &state->gamma_lut,
527 val,
528 -1, sizeof(struct drm_color_lut),
529 &replaced);
530 state->color_mgmt_changed |= replaced;
531 return ret;
532 } else if (property == config->prop_out_fence_ptr) {
533 s32 __user *fence_ptr = u64_to_user_ptr(val);
534
535 if (!fence_ptr)
536 return 0;
537
538 if (put_user(-1, fence_ptr))
539 return -EFAULT;
540
541 set_out_fence_for_crtc(state->state, crtc, fence_ptr);
542 } else if (crtc->funcs->atomic_set_property)
543 return crtc->funcs->atomic_set_property(crtc, state, property, val);
544 else
545 return -EINVAL;
546
547 return 0;
548}
549EXPORT_SYMBOL(drm_atomic_crtc_set_property);
550
551/**
552 * drm_atomic_crtc_get_property - get property value from CRTC state
553 * @crtc: the drm CRTC to set a property on
554 * @state: the state object to get the property value from
555 * @property: the property to set
556 * @val: return location for the property value
557 *
558 * This function handles generic/core properties and calls out to driver's
559 * &drm_crtc_funcs.atomic_get_property for driver properties. To ensure
560 * consistent behavior you must call this function rather than the driver hook
561 * directly.
562 *
563 * RETURNS:
564 * Zero on success, error code on failure
565 */
566static int
567drm_atomic_crtc_get_property(struct drm_crtc *crtc,
568 const struct drm_crtc_state *state,
569 struct drm_property *property, uint64_t *val)
570{
571 struct drm_device *dev = crtc->dev;
572 struct drm_mode_config *config = &dev->mode_config;
573
574 if (property == config->prop_active)
575 *val = state->active;
576 else if (property == config->prop_mode_id)
577 *val = (state->mode_blob) ? state->mode_blob->base.id : 0;
578 else if (property == config->degamma_lut_property)
579 *val = (state->degamma_lut) ? state->degamma_lut->base.id : 0;
580 else if (property == config->ctm_property)
581 *val = (state->ctm) ? state->ctm->base.id : 0;
582 else if (property == config->gamma_lut_property)
583 *val = (state->gamma_lut) ? state->gamma_lut->base.id : 0;
584 else if (property == config->prop_out_fence_ptr)
585 *val = 0;
586 else if (crtc->funcs->atomic_get_property)
587 return crtc->funcs->atomic_get_property(crtc, state, property, val);
588 else
589 return -EINVAL;
590
591 return 0;
592}
593
594/**
595 * drm_atomic_crtc_check - check crtc state
596 * @crtc: crtc to check
597 * @state: crtc state to check
598 *
599 * Provides core sanity checks for crtc state.
600 *
601 * RETURNS:
602 * Zero on success, error code on failure
603 */
604static int drm_atomic_crtc_check(struct drm_crtc *crtc,
605 struct drm_crtc_state *state)
606{
607 /* NOTE: we explicitly don't enforce constraints such as primary
608 * layer covering entire screen, since that is something we want
609 * to allow (on hw that supports it). For hw that does not, it
610 * should be checked in driver's crtc->atomic_check() vfunc.
611 *
612 * TODO: Add generic modeset state checks once we support those.
613 */
614
615 if (state->active && !state->enable) {
616 DRM_DEBUG_ATOMIC("[CRTC:%d:%s] active without enabled\n",
617 crtc->base.id, crtc->name);
618 return -EINVAL;
619 }
620
621 /* The state->enable vs. state->mode_blob checks can be WARN_ON,
622 * as this is a kernel-internal detail that userspace should never
623 * be able to trigger. */
624 if (drm_core_check_feature(crtc->dev, DRIVER_ATOMIC) &&
625 WARN_ON(state->enable && !state->mode_blob)) {
626 DRM_DEBUG_ATOMIC("[CRTC:%d:%s] enabled without mode blob\n",
627 crtc->base.id, crtc->name);
628 return -EINVAL;
629 }
630
631 if (drm_core_check_feature(crtc->dev, DRIVER_ATOMIC) &&
632 WARN_ON(!state->enable && state->mode_blob)) {
633 DRM_DEBUG_ATOMIC("[CRTC:%d:%s] disabled with mode blob\n",
634 crtc->base.id, crtc->name);
635 return -EINVAL;
636 }
637
638 /*
639 * Reject event generation for when a CRTC is off and stays off.
640 * It wouldn't be hard to implement this, but userspace has a track
641 * record of happily burning through 100% cpu (or worse, crash) when the
642 * display pipe is suspended. To avoid all that fun just reject updates
643 * that ask for events since likely that indicates a bug in the
644 * compositor's drawing loop. This is consistent with the vblank IOCTL
645 * and legacy page_flip IOCTL which also reject service on a disabled
646 * pipe.
647 */
648 if (state->event && !state->active && !crtc->state->active) {
649 DRM_DEBUG_ATOMIC("[CRTC:%d:%s] requesting event but off\n",
650 crtc->base.id, crtc->name);
651 return -EINVAL;
652 }
653
654 return 0;
655}
656
657static void drm_atomic_crtc_print_state(struct drm_printer *p,
658 const struct drm_crtc_state *state)
659{
660 struct drm_crtc *crtc = state->crtc;
661
662 drm_printf(p, "crtc[%u]: %s\n", crtc->base.id, crtc->name);
663 drm_printf(p, "\tenable=%d\n", state->enable);
664 drm_printf(p, "\tactive=%d\n", state->active);
665 drm_printf(p, "\tplanes_changed=%d\n", state->planes_changed);
666 drm_printf(p, "\tmode_changed=%d\n", state->mode_changed);
667 drm_printf(p, "\tactive_changed=%d\n", state->active_changed);
668 drm_printf(p, "\tconnectors_changed=%d\n", state->connectors_changed);
669 drm_printf(p, "\tcolor_mgmt_changed=%d\n", state->color_mgmt_changed);
670 drm_printf(p, "\tplane_mask=%x\n", state->plane_mask);
671 drm_printf(p, "\tconnector_mask=%x\n", state->connector_mask);
672 drm_printf(p, "\tencoder_mask=%x\n", state->encoder_mask);
673 drm_printf(p, "\tmode: " DRM_MODE_FMT "\n", DRM_MODE_ARG(&state->mode));
674
675 if (crtc->funcs->atomic_print_state)
676 crtc->funcs->atomic_print_state(p, state);
677}
678
679/**
680 * drm_atomic_get_plane_state - get plane state
681 * @state: global atomic state object
682 * @plane: plane to get state object for
683 *
684 * This function returns the plane state for the given plane, allocating it if
685 * needed. It will also grab the relevant plane lock to make sure that the state
686 * is consistent.
687 *
688 * Returns:
689 *
690 * Either the allocated state or the error code encoded into the pointer. When
691 * the error is EDEADLK then the w/w mutex code has detected a deadlock and the
692 * entire atomic sequence must be restarted. All other errors are fatal.
693 */
694struct drm_plane_state *
695drm_atomic_get_plane_state(struct drm_atomic_state *state,
696 struct drm_plane *plane)
697{
698 int ret, index = drm_plane_index(plane);
699 struct drm_plane_state *plane_state;
700
701 WARN_ON(!state->acquire_ctx);
702
703 plane_state = drm_atomic_get_existing_plane_state(state, plane);
704 if (plane_state)
705 return plane_state;
706
707 ret = drm_modeset_lock(&plane->mutex, state->acquire_ctx);
708 if (ret)
709 return ERR_PTR(ret);
710
711 plane_state = plane->funcs->atomic_duplicate_state(plane);
712 if (!plane_state)
713 return ERR_PTR(-ENOMEM);
714
715 state->planes[index].state = plane_state;
716 state->planes[index].ptr = plane;
717 state->planes[index].old_state = plane->state;
718 state->planes[index].new_state = plane_state;
719 plane_state->state = state;
720
721 DRM_DEBUG_ATOMIC("Added [PLANE:%d:%s] %p state to %p\n",
722 plane->base.id, plane->name, plane_state, state);
723
724 if (plane_state->crtc) {
725 struct drm_crtc_state *crtc_state;
726
727 crtc_state = drm_atomic_get_crtc_state(state,
728 plane_state->crtc);
729 if (IS_ERR(crtc_state))
730 return ERR_CAST(crtc_state);
731 }
732
733 return plane_state;
734}
735EXPORT_SYMBOL(drm_atomic_get_plane_state);
736
737/**
738 * drm_atomic_plane_set_property - set property on plane
739 * @plane: the drm plane to set a property on
740 * @state: the state object to update with the new property value
741 * @property: the property to set
742 * @val: the new property value
743 *
744 * This function handles generic/core properties and calls out to driver's
745 * &drm_plane_funcs.atomic_set_property for driver properties. To ensure
746 * consistent behavior you must call this function rather than the driver hook
747 * directly.
748 *
749 * RETURNS:
750 * Zero on success, error code on failure
751 */
752static int drm_atomic_plane_set_property(struct drm_plane *plane,
753 struct drm_plane_state *state, struct drm_property *property,
754 uint64_t val)
755{
756 struct drm_device *dev = plane->dev;
757 struct drm_mode_config *config = &dev->mode_config;
758
759 if (property == config->prop_fb_id) {
760 struct drm_framebuffer *fb = drm_framebuffer_lookup(dev, NULL, val);
761 drm_atomic_set_fb_for_plane(state, fb);
762 if (fb)
763 drm_framebuffer_put(fb);
764 } else if (property == config->prop_in_fence_fd) {
765 if (state->fence)
766 return -EINVAL;
767
768 if (U642I64(val) == -1)
769 return 0;
770
771 state->fence = sync_file_get_fence(val);
772 if (!state->fence)
773 return -EINVAL;
774
775 } else if (property == config->prop_crtc_id) {
776 struct drm_crtc *crtc = drm_crtc_find(dev, NULL, val);
777 return drm_atomic_set_crtc_for_plane(state, crtc);
778 } else if (property == config->prop_crtc_x) {
779 state->crtc_x = U642I64(val);
780 } else if (property == config->prop_crtc_y) {
781 state->crtc_y = U642I64(val);
782 } else if (property == config->prop_crtc_w) {
783 state->crtc_w = val;
784 } else if (property == config->prop_crtc_h) {
785 state->crtc_h = val;
786 } else if (property == config->prop_src_x) {
787 state->src_x = val;
788 } else if (property == config->prop_src_y) {
789 state->src_y = val;
790 } else if (property == config->prop_src_w) {
791 state->src_w = val;
792 } else if (property == config->prop_src_h) {
793 state->src_h = val;
794 } else if (property == plane->rotation_property) {
795 if (!is_power_of_2(val & DRM_MODE_ROTATE_MASK))
796 return -EINVAL;
797 state->rotation = val;
798 } else if (property == plane->zpos_property) {
799 state->zpos = val;
800 } else if (property == plane->color_encoding_property) {
801 state->color_encoding = val;
802 } else if (property == plane->color_range_property) {
803 state->color_range = val;
804 } else if (plane->funcs->atomic_set_property) {
805 return plane->funcs->atomic_set_property(plane, state,
806 property, val);
807 } else {
808 return -EINVAL;
809 }
810
811 return 0;
812}
813
814/**
815 * drm_atomic_plane_get_property - get property value from plane state
816 * @plane: the drm plane to set a property on
817 * @state: the state object to get the property value from
818 * @property: the property to set
819 * @val: return location for the property value
820 *
821 * This function handles generic/core properties and calls out to driver's
822 * &drm_plane_funcs.atomic_get_property for driver properties. To ensure
823 * consistent behavior you must call this function rather than the driver hook
824 * directly.
825 *
826 * RETURNS:
827 * Zero on success, error code on failure
828 */
829static int
830drm_atomic_plane_get_property(struct drm_plane *plane,
831 const struct drm_plane_state *state,
832 struct drm_property *property, uint64_t *val)
833{
834 struct drm_device *dev = plane->dev;
835 struct drm_mode_config *config = &dev->mode_config;
836
837 if (property == config->prop_fb_id) {
838 *val = (state->fb) ? state->fb->base.id : 0;
839 } else if (property == config->prop_in_fence_fd) {
840 *val = -1;
841 } else if (property == config->prop_crtc_id) {
842 *val = (state->crtc) ? state->crtc->base.id : 0;
843 } else if (property == config->prop_crtc_x) {
844 *val = I642U64(state->crtc_x);
845 } else if (property == config->prop_crtc_y) {
846 *val = I642U64(state->crtc_y);
847 } else if (property == config->prop_crtc_w) {
848 *val = state->crtc_w;
849 } else if (property == config->prop_crtc_h) {
850 *val = state->crtc_h;
851 } else if (property == config->prop_src_x) {
852 *val = state->src_x;
853 } else if (property == config->prop_src_y) {
854 *val = state->src_y;
855 } else if (property == config->prop_src_w) {
856 *val = state->src_w;
857 } else if (property == config->prop_src_h) {
858 *val = state->src_h;
859 } else if (property == plane->rotation_property) {
860 *val = state->rotation;
861 } else if (property == plane->zpos_property) {
862 *val = state->zpos;
863 } else if (property == plane->color_encoding_property) {
864 *val = state->color_encoding;
865 } else if (property == plane->color_range_property) {
866 *val = state->color_range;
867 } else if (plane->funcs->atomic_get_property) {
868 return plane->funcs->atomic_get_property(plane, state, property, val);
869 } else {
870 return -EINVAL;
871 }
872
873 return 0;
874}
875
876static bool
877plane_switching_crtc(struct drm_atomic_state *state,
878 struct drm_plane *plane,
879 struct drm_plane_state *plane_state)
880{
881 if (!plane->state->crtc || !plane_state->crtc)
882 return false;
883
884 if (plane->state->crtc == plane_state->crtc)
885 return false;
886
887 /* This could be refined, but currently there's no helper or driver code
888 * to implement direct switching of active planes nor userspace to take
889 * advantage of more direct plane switching without the intermediate
890 * full OFF state.
891 */
892 return true;
893}
894
895/**
896 * drm_atomic_plane_check - check plane state
897 * @plane: plane to check
898 * @state: plane state to check
899 *
900 * Provides core sanity checks for plane state.
901 *
902 * RETURNS:
903 * Zero on success, error code on failure
904 */
905static int drm_atomic_plane_check(struct drm_plane *plane,
906 struct drm_plane_state *state)
907{
908 unsigned int fb_width, fb_height;
909 int ret;
910
911 /* either *both* CRTC and FB must be set, or neither */
912 if (state->crtc && !state->fb) {
913 DRM_DEBUG_ATOMIC("CRTC set but no FB\n");
914 return -EINVAL;
915 } else if (state->fb && !state->crtc) {
916 DRM_DEBUG_ATOMIC("FB set but no CRTC\n");
917 return -EINVAL;
918 }
919
920 /* if disabled, we don't care about the rest of the state: */
921 if (!state->crtc)
922 return 0;
923
924 /* Check whether this plane is usable on this CRTC */
925 if (!(plane->possible_crtcs & drm_crtc_mask(state->crtc))) {
926 DRM_DEBUG_ATOMIC("Invalid crtc for plane\n");
927 return -EINVAL;
928 }
929
930 /* Check whether this plane supports the fb pixel format. */
931 ret = drm_plane_check_pixel_format(plane, state->fb->format->format,
932 state->fb->modifier);
933 if (ret) {
934 struct drm_format_name_buf format_name;
935 DRM_DEBUG_ATOMIC("Invalid pixel format %s, modifier 0x%llx\n",
936 drm_get_format_name(state->fb->format->format,
937 &format_name),
938 state->fb->modifier);
939 return ret;
940 }
941
942 /* Give drivers some help against integer overflows */
943 if (state->crtc_w > INT_MAX ||
944 state->crtc_x > INT_MAX - (int32_t) state->crtc_w ||
945 state->crtc_h > INT_MAX ||
946 state->crtc_y > INT_MAX - (int32_t) state->crtc_h) {
947 DRM_DEBUG_ATOMIC("Invalid CRTC coordinates %ux%u+%d+%d\n",
948 state->crtc_w, state->crtc_h,
949 state->crtc_x, state->crtc_y);
950 return -ERANGE;
951 }
952
953 fb_width = state->fb->width << 16;
954 fb_height = state->fb->height << 16;
955
956 /* Make sure source coordinates are inside the fb. */
957 if (state->src_w > fb_width ||
958 state->src_x > fb_width - state->src_w ||
959 state->src_h > fb_height ||
960 state->src_y > fb_height - state->src_h) {
961 DRM_DEBUG_ATOMIC("Invalid source coordinates "
962 "%u.%06ux%u.%06u+%u.%06u+%u.%06u (fb %ux%u)\n",
963 state->src_w >> 16, ((state->src_w & 0xffff) * 15625) >> 10,
964 state->src_h >> 16, ((state->src_h & 0xffff) * 15625) >> 10,
965 state->src_x >> 16, ((state->src_x & 0xffff) * 15625) >> 10,
966 state->src_y >> 16, ((state->src_y & 0xffff) * 15625) >> 10,
967 state->fb->width, state->fb->height);
968 return -ENOSPC;
969 }
970
971 if (plane_switching_crtc(state->state, plane, state)) {
972 DRM_DEBUG_ATOMIC("[PLANE:%d:%s] switching CRTC directly\n",
973 plane->base.id, plane->name);
974 return -EINVAL;
975 }
976
977 return 0;
978}
979
980static void drm_atomic_plane_print_state(struct drm_printer *p,
981 const struct drm_plane_state *state)
982{
983 struct drm_plane *plane = state->plane;
984 struct drm_rect src = drm_plane_state_src(state);
985 struct drm_rect dest = drm_plane_state_dest(state);
986
987 drm_printf(p, "plane[%u]: %s\n", plane->base.id, plane->name);
988 drm_printf(p, "\tcrtc=%s\n", state->crtc ? state->crtc->name : "(null)");
989 drm_printf(p, "\tfb=%u\n", state->fb ? state->fb->base.id : 0);
990 if (state->fb)
991 drm_framebuffer_print_info(p, 2, state->fb);
992 drm_printf(p, "\tcrtc-pos=" DRM_RECT_FMT "\n", DRM_RECT_ARG(&dest));
993 drm_printf(p, "\tsrc-pos=" DRM_RECT_FP_FMT "\n", DRM_RECT_FP_ARG(&src));
994 drm_printf(p, "\trotation=%x\n", state->rotation);
995 drm_printf(p, "\tcolor-encoding=%s\n",
996 drm_get_color_encoding_name(state->color_encoding));
997 drm_printf(p, "\tcolor-range=%s\n",
998 drm_get_color_range_name(state->color_range));
999
1000 if (plane->funcs->atomic_print_state)
1001 plane->funcs->atomic_print_state(p, state);
1002}
1003
1004/**
1005 * DOC: handling driver private state
1006 *
1007 * Very often the DRM objects exposed to userspace in the atomic modeset api
1008 * (&drm_connector, &drm_crtc and &drm_plane) do not map neatly to the
1009 * underlying hardware. Especially for any kind of shared resources (e.g. shared
1010 * clocks, scaler units, bandwidth and fifo limits shared among a group of
1011 * planes or CRTCs, and so on) it makes sense to model these as independent
1012 * objects. Drivers then need to do similar state tracking and commit ordering for
1013 * such private (since not exposed to userpace) objects as the atomic core and
1014 * helpers already provide for connectors, planes and CRTCs.
1015 *
1016 * To make this easier on drivers the atomic core provides some support to track
1017 * driver private state objects using struct &drm_private_obj, with the
1018 * associated state struct &drm_private_state.
1019 *
1020 * Similar to userspace-exposed objects, private state structures can be
1021 * acquired by calling drm_atomic_get_private_obj_state(). Since this function
1022 * does not take care of locking, drivers should wrap it for each type of
1023 * private state object they have with the required call to drm_modeset_lock()
1024 * for the corresponding &drm_modeset_lock.
1025 *
1026 * All private state structures contained in a &drm_atomic_state update can be
1027 * iterated using for_each_oldnew_private_obj_in_state(),
1028 * for_each_new_private_obj_in_state() and for_each_old_private_obj_in_state().
1029 * Drivers are recommended to wrap these for each type of driver private state
1030 * object they have, filtering on &drm_private_obj.funcs using for_each_if(), at
1031 * least if they want to iterate over all objects of a given type.
1032 *
1033 * An earlier way to handle driver private state was by subclassing struct
1034 * &drm_atomic_state. But since that encourages non-standard ways to implement
1035 * the check/commit split atomic requires (by using e.g. "check and rollback or
1036 * commit instead" of "duplicate state, check, then either commit or release
1037 * duplicated state) it is deprecated in favour of using &drm_private_state.
1038 */
1039
1040/**
1041 * drm_atomic_private_obj_init - initialize private object
1042 * @obj: private object
1043 * @state: initial private object state
1044 * @funcs: pointer to the struct of function pointers that identify the object
1045 * type
1046 *
1047 * Initialize the private object, which can be embedded into any
1048 * driver private object that needs its own atomic state.
1049 */
1050void
1051drm_atomic_private_obj_init(struct drm_private_obj *obj,
1052 struct drm_private_state *state,
1053 const struct drm_private_state_funcs *funcs)
1054{
1055 memset(obj, 0, sizeof(*obj));
1056
1057 obj->state = state;
1058 obj->funcs = funcs;
1059}
1060EXPORT_SYMBOL(drm_atomic_private_obj_init);
1061
1062/**
1063 * drm_atomic_private_obj_fini - finalize private object
1064 * @obj: private object
1065 *
1066 * Finalize the private object.
1067 */
1068void
1069drm_atomic_private_obj_fini(struct drm_private_obj *obj)
1070{
1071 obj->funcs->atomic_destroy_state(obj, obj->state);
1072}
1073EXPORT_SYMBOL(drm_atomic_private_obj_fini);
1074
1075/**
1076 * drm_atomic_get_private_obj_state - get private object state
1077 * @state: global atomic state
1078 * @obj: private object to get the state for
1079 *
1080 * This function returns the private object state for the given private object,
1081 * allocating the state if needed. It does not grab any locks as the caller is
1082 * expected to care of any required locking.
1083 *
1084 * RETURNS:
1085 *
1086 * Either the allocated state or the error code encoded into a pointer.
1087 */
1088struct drm_private_state *
1089drm_atomic_get_private_obj_state(struct drm_atomic_state *state,
1090 struct drm_private_obj *obj)
1091{
1092 int index, num_objs, i;
1093 size_t size;
1094 struct __drm_private_objs_state *arr;
1095 struct drm_private_state *obj_state;
1096
1097 for (i = 0; i < state->num_private_objs; i++)
1098 if (obj == state->private_objs[i].ptr)
1099 return state->private_objs[i].state;
1100
1101 num_objs = state->num_private_objs + 1;
1102 size = sizeof(*state->private_objs) * num_objs;
1103 arr = krealloc(state->private_objs, size, GFP_KERNEL);
1104 if (!arr)
1105 return ERR_PTR(-ENOMEM);
1106
1107 state->private_objs = arr;
1108 index = state->num_private_objs;
1109 memset(&state->private_objs[index], 0, sizeof(*state->private_objs));
1110
1111 obj_state = obj->funcs->atomic_duplicate_state(obj);
1112 if (!obj_state)
1113 return ERR_PTR(-ENOMEM);
1114
1115 state->private_objs[index].state = obj_state;
1116 state->private_objs[index].old_state = obj->state;
1117 state->private_objs[index].new_state = obj_state;
1118 state->private_objs[index].ptr = obj;
1119
1120 state->num_private_objs = num_objs;
1121
1122 DRM_DEBUG_ATOMIC("Added new private object %p state %p to %p\n",
1123 obj, obj_state, state);
1124
1125 return obj_state;
1126}
1127EXPORT_SYMBOL(drm_atomic_get_private_obj_state);
1128
1129/**
1130 * drm_atomic_get_connector_state - get connector state
1131 * @state: global atomic state object
1132 * @connector: connector to get state object for
1133 *
1134 * This function returns the connector state for the given connector,
1135 * allocating it if needed. It will also grab the relevant connector lock to
1136 * make sure that the state is consistent.
1137 *
1138 * Returns:
1139 *
1140 * Either the allocated state or the error code encoded into the pointer. When
1141 * the error is EDEADLK then the w/w mutex code has detected a deadlock and the
1142 * entire atomic sequence must be restarted. All other errors are fatal.
1143 */
1144struct drm_connector_state *
1145drm_atomic_get_connector_state(struct drm_atomic_state *state,
1146 struct drm_connector *connector)
1147{
1148 int ret, index;
1149 struct drm_mode_config *config = &connector->dev->mode_config;
1150 struct drm_connector_state *connector_state;
1151
1152 WARN_ON(!state->acquire_ctx);
1153
1154 ret = drm_modeset_lock(&config->connection_mutex, state->acquire_ctx);
1155 if (ret)
1156 return ERR_PTR(ret);
1157
1158 index = drm_connector_index(connector);
1159
1160 if (index >= state->num_connector) {
1161 struct __drm_connnectors_state *c;
1162 int alloc = max(index + 1, config->num_connector);
1163
1164 c = krealloc(state->connectors, alloc * sizeof(*state->connectors), GFP_KERNEL);
1165 if (!c)
1166 return ERR_PTR(-ENOMEM);
1167
1168 state->connectors = c;
1169 memset(&state->connectors[state->num_connector], 0,
1170 sizeof(*state->connectors) * (alloc - state->num_connector));
1171
1172 state->num_connector = alloc;
1173 }
1174
1175 if (state->connectors[index].state)
1176 return state->connectors[index].state;
1177
1178 connector_state = connector->funcs->atomic_duplicate_state(connector);
1179 if (!connector_state)
1180 return ERR_PTR(-ENOMEM);
1181
1182 drm_connector_get(connector);
1183 state->connectors[index].state = connector_state;
1184 state->connectors[index].old_state = connector->state;
1185 state->connectors[index].new_state = connector_state;
1186 state->connectors[index].ptr = connector;
1187 connector_state->state = state;
1188
1189 DRM_DEBUG_ATOMIC("Added [CONNECTOR:%d:%s] %p state to %p\n",
1190 connector->base.id, connector->name,
1191 connector_state, state);
1192
1193 if (connector_state->crtc) {
1194 struct drm_crtc_state *crtc_state;
1195
1196 crtc_state = drm_atomic_get_crtc_state(state,
1197 connector_state->crtc);
1198 if (IS_ERR(crtc_state))
1199 return ERR_CAST(crtc_state);
1200 }
1201
1202 return connector_state;
1203}
1204EXPORT_SYMBOL(drm_atomic_get_connector_state);
1205
1206/**
1207 * drm_atomic_connector_set_property - set property on connector.
1208 * @connector: the drm connector to set a property on
1209 * @state: the state object to update with the new property value
1210 * @property: the property to set
1211 * @val: the new property value
1212 *
1213 * This function handles generic/core properties and calls out to driver's
1214 * &drm_connector_funcs.atomic_set_property for driver properties. To ensure
1215 * consistent behavior you must call this function rather than the driver hook
1216 * directly.
1217 *
1218 * RETURNS:
1219 * Zero on success, error code on failure
1220 */
1221static int drm_atomic_connector_set_property(struct drm_connector *connector,
1222 struct drm_connector_state *state, struct drm_property *property,
1223 uint64_t val)
1224{
1225 struct drm_device *dev = connector->dev;
1226 struct drm_mode_config *config = &dev->mode_config;
1227
1228 if (property == config->prop_crtc_id) {
1229 struct drm_crtc *crtc = drm_crtc_find(dev, NULL, val);
1230 return drm_atomic_set_crtc_for_connector(state, crtc);
1231 } else if (property == config->dpms_property) {
1232 /* setting DPMS property requires special handling, which
1233 * is done in legacy setprop path for us. Disallow (for
1234 * now?) atomic writes to DPMS property:
1235 */
1236 return -EINVAL;
1237 } else if (property == config->tv_select_subconnector_property) {
1238 state->tv.subconnector = val;
1239 } else if (property == config->tv_left_margin_property) {
1240 state->tv.margins.left = val;
1241 } else if (property == config->tv_right_margin_property) {
1242 state->tv.margins.right = val;
1243 } else if (property == config->tv_top_margin_property) {
1244 state->tv.margins.top = val;
1245 } else if (property == config->tv_bottom_margin_property) {
1246 state->tv.margins.bottom = val;
1247 } else if (property == config->tv_mode_property) {
1248 state->tv.mode = val;
1249 } else if (property == config->tv_brightness_property) {
1250 state->tv.brightness = val;
1251 } else if (property == config->tv_contrast_property) {
1252 state->tv.contrast = val;
1253 } else if (property == config->tv_flicker_reduction_property) {
1254 state->tv.flicker_reduction = val;
1255 } else if (property == config->tv_overscan_property) {
1256 state->tv.overscan = val;
1257 } else if (property == config->tv_saturation_property) {
1258 state->tv.saturation = val;
1259 } else if (property == config->tv_hue_property) {
1260 state->tv.hue = val;
1261 } else if (property == config->link_status_property) {
1262 /* Never downgrade from GOOD to BAD on userspace's request here,
1263 * only hw issues can do that.
1264 *
1265 * For an atomic property the userspace doesn't need to be able
1266 * to understand all the properties, but needs to be able to
1267 * restore the state it wants on VT switch. So if the userspace
1268 * tries to change the link_status from GOOD to BAD, driver
1269 * silently rejects it and returns a 0. This prevents userspace
1270 * from accidently breaking the display when it restores the
1271 * state.
1272 */
1273 if (state->link_status != DRM_LINK_STATUS_GOOD)
1274 state->link_status = val;
1275 } else if (property == config->aspect_ratio_property) {
1276 state->picture_aspect_ratio = val;
1277 } else if (property == connector->scaling_mode_property) {
1278 state->scaling_mode = val;
1279 } else if (property == connector->content_protection_property) {
1280 if (val == DRM_MODE_CONTENT_PROTECTION_ENABLED) {
1281 DRM_DEBUG_KMS("only drivers can set CP Enabled\n");
1282 return -EINVAL;
1283 }
1284 state->content_protection = val;
1285 } else if (connector->funcs->atomic_set_property) {
1286 return connector->funcs->atomic_set_property(connector,
1287 state, property, val);
1288 } else {
1289 return -EINVAL;
1290 }
1291
1292 return 0;
1293}
1294
1295static void drm_atomic_connector_print_state(struct drm_printer *p,
1296 const struct drm_connector_state *state)
1297{
1298 struct drm_connector *connector = state->connector;
1299
1300 drm_printf(p, "connector[%u]: %s\n", connector->base.id, connector->name);
1301 drm_printf(p, "\tcrtc=%s\n", state->crtc ? state->crtc->name : "(null)");
1302
1303 if (connector->funcs->atomic_print_state)
1304 connector->funcs->atomic_print_state(p, state);
1305}
1306
1307/**
1308 * drm_atomic_connector_get_property - get property value from connector state
1309 * @connector: the drm connector to set a property on
1310 * @state: the state object to get the property value from
1311 * @property: the property to set
1312 * @val: return location for the property value
1313 *
1314 * This function handles generic/core properties and calls out to driver's
1315 * &drm_connector_funcs.atomic_get_property for driver properties. To ensure
1316 * consistent behavior you must call this function rather than the driver hook
1317 * directly.
1318 *
1319 * RETURNS:
1320 * Zero on success, error code on failure
1321 */
1322static int
1323drm_atomic_connector_get_property(struct drm_connector *connector,
1324 const struct drm_connector_state *state,
1325 struct drm_property *property, uint64_t *val)
1326{
1327 struct drm_device *dev = connector->dev;
1328 struct drm_mode_config *config = &dev->mode_config;
1329
1330 if (property == config->prop_crtc_id) {
1331 *val = (state->crtc) ? state->crtc->base.id : 0;
1332 } else if (property == config->dpms_property) {
1333 *val = connector->dpms;
1334 } else if (property == config->tv_select_subconnector_property) {
1335 *val = state->tv.subconnector;
1336 } else if (property == config->tv_left_margin_property) {
1337 *val = state->tv.margins.left;
1338 } else if (property == config->tv_right_margin_property) {
1339 *val = state->tv.margins.right;
1340 } else if (property == config->tv_top_margin_property) {
1341 *val = state->tv.margins.top;
1342 } else if (property == config->tv_bottom_margin_property) {
1343 *val = state->tv.margins.bottom;
1344 } else if (property == config->tv_mode_property) {
1345 *val = state->tv.mode;
1346 } else if (property == config->tv_brightness_property) {
1347 *val = state->tv.brightness;
1348 } else if (property == config->tv_contrast_property) {
1349 *val = state->tv.contrast;
1350 } else if (property == config->tv_flicker_reduction_property) {
1351 *val = state->tv.flicker_reduction;
1352 } else if (property == config->tv_overscan_property) {
1353 *val = state->tv.overscan;
1354 } else if (property == config->tv_saturation_property) {
1355 *val = state->tv.saturation;
1356 } else if (property == config->tv_hue_property) {
1357 *val = state->tv.hue;
1358 } else if (property == config->link_status_property) {
1359 *val = state->link_status;
1360 } else if (property == config->aspect_ratio_property) {
1361 *val = state->picture_aspect_ratio;
1362 } else if (property == connector->scaling_mode_property) {
1363 *val = state->scaling_mode;
1364 } else if (property == connector->content_protection_property) {
1365 *val = state->content_protection;
1366 } else if (connector->funcs->atomic_get_property) {
1367 return connector->funcs->atomic_get_property(connector,
1368 state, property, val);
1369 } else {
1370 return -EINVAL;
1371 }
1372
1373 return 0;
1374}
1375
1376int drm_atomic_get_property(struct drm_mode_object *obj,
1377 struct drm_property *property, uint64_t *val)
1378{
1379 struct drm_device *dev = property->dev;
1380 int ret;
1381
1382 switch (obj->type) {
1383 case DRM_MODE_OBJECT_CONNECTOR: {
1384 struct drm_connector *connector = obj_to_connector(obj);
1385 WARN_ON(!drm_modeset_is_locked(&dev->mode_config.connection_mutex));
1386 ret = drm_atomic_connector_get_property(connector,
1387 connector->state, property, val);
1388 break;
1389 }
1390 case DRM_MODE_OBJECT_CRTC: {
1391 struct drm_crtc *crtc = obj_to_crtc(obj);
1392 WARN_ON(!drm_modeset_is_locked(&crtc->mutex));
1393 ret = drm_atomic_crtc_get_property(crtc,
1394 crtc->state, property, val);
1395 break;
1396 }
1397 case DRM_MODE_OBJECT_PLANE: {
1398 struct drm_plane *plane = obj_to_plane(obj);
1399 WARN_ON(!drm_modeset_is_locked(&plane->mutex));
1400 ret = drm_atomic_plane_get_property(plane,
1401 plane->state, property, val);
1402 break;
1403 }
1404 default:
1405 ret = -EINVAL;
1406 break;
1407 }
1408
1409 return ret;
1410}
1411
1412/**
1413 * drm_atomic_set_crtc_for_plane - set crtc for plane
1414 * @plane_state: the plane whose incoming state to update
1415 * @crtc: crtc to use for the plane
1416 *
1417 * Changing the assigned crtc for a plane requires us to grab the lock and state
1418 * for the new crtc, as needed. This function takes care of all these details
1419 * besides updating the pointer in the state object itself.
1420 *
1421 * Returns:
1422 * 0 on success or can fail with -EDEADLK or -ENOMEM. When the error is EDEADLK
1423 * then the w/w mutex code has detected a deadlock and the entire atomic
1424 * sequence must be restarted. All other errors are fatal.
1425 */
1426int
1427drm_atomic_set_crtc_for_plane(struct drm_plane_state *plane_state,
1428 struct drm_crtc *crtc)
1429{
1430 struct drm_plane *plane = plane_state->plane;
1431 struct drm_crtc_state *crtc_state;
1432
1433 if (plane_state->crtc) {
1434 crtc_state = drm_atomic_get_crtc_state(plane_state->state,
1435 plane_state->crtc);
1436 if (WARN_ON(IS_ERR(crtc_state)))
1437 return PTR_ERR(crtc_state);
1438
1439 crtc_state->plane_mask &= ~(1 << drm_plane_index(plane));
1440 }
1441
1442 plane_state->crtc = crtc;
1443
1444 if (crtc) {
1445 crtc_state = drm_atomic_get_crtc_state(plane_state->state,
1446 crtc);
1447 if (IS_ERR(crtc_state))
1448 return PTR_ERR(crtc_state);
1449 crtc_state->plane_mask |= (1 << drm_plane_index(plane));
1450 }
1451
1452 if (crtc)
1453 DRM_DEBUG_ATOMIC("Link plane state %p to [CRTC:%d:%s]\n",
1454 plane_state, crtc->base.id, crtc->name);
1455 else
1456 DRM_DEBUG_ATOMIC("Link plane state %p to [NOCRTC]\n",
1457 plane_state);
1458
1459 return 0;
1460}
1461EXPORT_SYMBOL(drm_atomic_set_crtc_for_plane);
1462
1463/**
1464 * drm_atomic_set_fb_for_plane - set framebuffer for plane
1465 * @plane_state: atomic state object for the plane
1466 * @fb: fb to use for the plane
1467 *
1468 * Changing the assigned framebuffer for a plane requires us to grab a reference
1469 * to the new fb and drop the reference to the old fb, if there is one. This
1470 * function takes care of all these details besides updating the pointer in the
1471 * state object itself.
1472 */
1473void
1474drm_atomic_set_fb_for_plane(struct drm_plane_state *plane_state,
1475 struct drm_framebuffer *fb)
1476{
1477 if (fb)
1478 DRM_DEBUG_ATOMIC("Set [FB:%d] for plane state %p\n",
1479 fb->base.id, plane_state);
1480 else
1481 DRM_DEBUG_ATOMIC("Set [NOFB] for plane state %p\n",
1482 plane_state);
1483
1484 drm_framebuffer_assign(&plane_state->fb, fb);
1485}
1486EXPORT_SYMBOL(drm_atomic_set_fb_for_plane);
1487
1488/**
1489 * drm_atomic_set_fence_for_plane - set fence for plane
1490 * @plane_state: atomic state object for the plane
1491 * @fence: dma_fence to use for the plane
1492 *
1493 * Helper to setup the plane_state fence in case it is not set yet.
1494 * By using this drivers doesn't need to worry if the user choose
1495 * implicit or explicit fencing.
1496 *
1497 * This function will not set the fence to the state if it was set
1498 * via explicit fencing interfaces on the atomic ioctl. In that case it will
1499 * drop the reference to the fence as we are not storing it anywhere.
1500 * Otherwise, if &drm_plane_state.fence is not set this function we just set it
1501 * with the received implicit fence. In both cases this function consumes a
1502 * reference for @fence.
1503 */
1504void
1505drm_atomic_set_fence_for_plane(struct drm_plane_state *plane_state,
1506 struct dma_fence *fence)
1507{
1508 if (plane_state->fence) {
1509 dma_fence_put(fence);
1510 return;
1511 }
1512
1513 plane_state->fence = fence;
1514}
1515EXPORT_SYMBOL(drm_atomic_set_fence_for_plane);
1516
1517/**
1518 * drm_atomic_set_crtc_for_connector - set crtc for connector
1519 * @conn_state: atomic state object for the connector
1520 * @crtc: crtc to use for the connector
1521 *
1522 * Changing the assigned crtc for a connector requires us to grab the lock and
1523 * state for the new crtc, as needed. This function takes care of all these
1524 * details besides updating the pointer in the state object itself.
1525 *
1526 * Returns:
1527 * 0 on success or can fail with -EDEADLK or -ENOMEM. When the error is EDEADLK
1528 * then the w/w mutex code has detected a deadlock and the entire atomic
1529 * sequence must be restarted. All other errors are fatal.
1530 */
1531int
1532drm_atomic_set_crtc_for_connector(struct drm_connector_state *conn_state,
1533 struct drm_crtc *crtc)
1534{
1535 struct drm_crtc_state *crtc_state;
1536
1537 if (conn_state->crtc == crtc)
1538 return 0;
1539
1540 if (conn_state->crtc) {
1541 crtc_state = drm_atomic_get_new_crtc_state(conn_state->state,
1542 conn_state->crtc);
1543
1544 crtc_state->connector_mask &=
1545 ~(1 << drm_connector_index(conn_state->connector));
1546
1547 drm_connector_put(conn_state->connector);
1548 conn_state->crtc = NULL;
1549 }
1550
1551 if (crtc) {
1552 crtc_state = drm_atomic_get_crtc_state(conn_state->state, crtc);
1553 if (IS_ERR(crtc_state))
1554 return PTR_ERR(crtc_state);
1555
1556 crtc_state->connector_mask |=
1557 1 << drm_connector_index(conn_state->connector);
1558
1559 drm_connector_get(conn_state->connector);
1560 conn_state->crtc = crtc;
1561
1562 DRM_DEBUG_ATOMIC("Link connector state %p to [CRTC:%d:%s]\n",
1563 conn_state, crtc->base.id, crtc->name);
1564 } else {
1565 DRM_DEBUG_ATOMIC("Link connector state %p to [NOCRTC]\n",
1566 conn_state);
1567 }
1568
1569 return 0;
1570}
1571EXPORT_SYMBOL(drm_atomic_set_crtc_for_connector);
1572
1573/**
1574 * drm_atomic_add_affected_connectors - add connectors for crtc
1575 * @state: atomic state
1576 * @crtc: DRM crtc
1577 *
1578 * This function walks the current configuration and adds all connectors
1579 * currently using @crtc to the atomic configuration @state. Note that this
1580 * function must acquire the connection mutex. This can potentially cause
1581 * unneeded seralization if the update is just for the planes on one crtc. Hence
1582 * drivers and helpers should only call this when really needed (e.g. when a
1583 * full modeset needs to happen due to some change).
1584 *
1585 * Returns:
1586 * 0 on success or can fail with -EDEADLK or -ENOMEM. When the error is EDEADLK
1587 * then the w/w mutex code has detected a deadlock and the entire atomic
1588 * sequence must be restarted. All other errors are fatal.
1589 */
1590int
1591drm_atomic_add_affected_connectors(struct drm_atomic_state *state,
1592 struct drm_crtc *crtc)
1593{
1594 struct drm_mode_config *config = &state->dev->mode_config;
1595 struct drm_connector *connector;
1596 struct drm_connector_state *conn_state;
1597 struct drm_connector_list_iter conn_iter;
1598 struct drm_crtc_state *crtc_state;
1599 int ret;
1600
1601 crtc_state = drm_atomic_get_crtc_state(state, crtc);
1602 if (IS_ERR(crtc_state))
1603 return PTR_ERR(crtc_state);
1604
1605 ret = drm_modeset_lock(&config->connection_mutex, state->acquire_ctx);
1606 if (ret)
1607 return ret;
1608
1609 DRM_DEBUG_ATOMIC("Adding all current connectors for [CRTC:%d:%s] to %p\n",
1610 crtc->base.id, crtc->name, state);
1611
1612 /*
1613 * Changed connectors are already in @state, so only need to look
1614 * at the connector_mask in crtc_state.
1615 */
1616 drm_connector_list_iter_begin(state->dev, &conn_iter);
1617 drm_for_each_connector_iter(connector, &conn_iter) {
1618 if (!(crtc_state->connector_mask & (1 << drm_connector_index(connector))))
1619 continue;
1620
1621 conn_state = drm_atomic_get_connector_state(state, connector);
1622 if (IS_ERR(conn_state)) {
1623 drm_connector_list_iter_end(&conn_iter);
1624 return PTR_ERR(conn_state);
1625 }
1626 }
1627 drm_connector_list_iter_end(&conn_iter);
1628
1629 return 0;
1630}
1631EXPORT_SYMBOL(drm_atomic_add_affected_connectors);
1632
1633/**
1634 * drm_atomic_add_affected_planes - add planes for crtc
1635 * @state: atomic state
1636 * @crtc: DRM crtc
1637 *
1638 * This function walks the current configuration and adds all planes
1639 * currently used by @crtc to the atomic configuration @state. This is useful
1640 * when an atomic commit also needs to check all currently enabled plane on
1641 * @crtc, e.g. when changing the mode. It's also useful when re-enabling a CRTC
1642 * to avoid special code to force-enable all planes.
1643 *
1644 * Since acquiring a plane state will always also acquire the w/w mutex of the
1645 * current CRTC for that plane (if there is any) adding all the plane states for
1646 * a CRTC will not reduce parallism of atomic updates.
1647 *
1648 * Returns:
1649 * 0 on success or can fail with -EDEADLK or -ENOMEM. When the error is EDEADLK
1650 * then the w/w mutex code has detected a deadlock and the entire atomic
1651 * sequence must be restarted. All other errors are fatal.
1652 */
1653int
1654drm_atomic_add_affected_planes(struct drm_atomic_state *state,
1655 struct drm_crtc *crtc)
1656{
1657 struct drm_plane *plane;
1658
1659 WARN_ON(!drm_atomic_get_new_crtc_state(state, crtc));
1660
1661 drm_for_each_plane_mask(plane, state->dev, crtc->state->plane_mask) {
1662 struct drm_plane_state *plane_state =
1663 drm_atomic_get_plane_state(state, plane);
1664
1665 if (IS_ERR(plane_state))
1666 return PTR_ERR(plane_state);
1667 }
1668 return 0;
1669}
1670EXPORT_SYMBOL(drm_atomic_add_affected_planes);
1671
1672/**
1673 * drm_atomic_check_only - check whether a given config would work
1674 * @state: atomic configuration to check
1675 *
1676 * Note that this function can return -EDEADLK if the driver needed to acquire
1677 * more locks but encountered a deadlock. The caller must then do the usual w/w
1678 * backoff dance and restart. All other errors are fatal.
1679 *
1680 * Returns:
1681 * 0 on success, negative error code on failure.
1682 */
1683int drm_atomic_check_only(struct drm_atomic_state *state)
1684{
1685 struct drm_device *dev = state->dev;
1686 struct drm_mode_config *config = &dev->mode_config;
1687 struct drm_plane *plane;
1688 struct drm_plane_state *plane_state;
1689 struct drm_crtc *crtc;
1690 struct drm_crtc_state *crtc_state;
1691 int i, ret = 0;
1692
1693 DRM_DEBUG_ATOMIC("checking %p\n", state);
1694
1695 for_each_new_plane_in_state(state, plane, plane_state, i) {
1696 ret = drm_atomic_plane_check(plane, plane_state);
1697 if (ret) {
1698 DRM_DEBUG_ATOMIC("[PLANE:%d:%s] atomic core check failed\n",
1699 plane->base.id, plane->name);
1700 return ret;
1701 }
1702 }
1703
1704 for_each_new_crtc_in_state(state, crtc, crtc_state, i) {
1705 ret = drm_atomic_crtc_check(crtc, crtc_state);
1706 if (ret) {
1707 DRM_DEBUG_ATOMIC("[CRTC:%d:%s] atomic core check failed\n",
1708 crtc->base.id, crtc->name);
1709 return ret;
1710 }
1711 }
1712
1713 if (config->funcs->atomic_check)
1714 ret = config->funcs->atomic_check(state->dev, state);
1715
1716 if (ret)
1717 return ret;
1718
1719 if (!state->allow_modeset) {
1720 for_each_new_crtc_in_state(state, crtc, crtc_state, i) {
1721 if (drm_atomic_crtc_needs_modeset(crtc_state)) {
1722 DRM_DEBUG_ATOMIC("[CRTC:%d:%s] requires full modeset\n",
1723 crtc->base.id, crtc->name);
1724 return -EINVAL;
1725 }
1726 }
1727 }
1728
1729 return 0;
1730}
1731EXPORT_SYMBOL(drm_atomic_check_only);
1732
1733/**
1734 * drm_atomic_commit - commit configuration atomically
1735 * @state: atomic configuration to check
1736 *
1737 * Note that this function can return -EDEADLK if the driver needed to acquire
1738 * more locks but encountered a deadlock. The caller must then do the usual w/w
1739 * backoff dance and restart. All other errors are fatal.
1740 *
1741 * This function will take its own reference on @state.
1742 * Callers should always release their reference with drm_atomic_state_put().
1743 *
1744 * Returns:
1745 * 0 on success, negative error code on failure.
1746 */
1747int drm_atomic_commit(struct drm_atomic_state *state)
1748{
1749 struct drm_mode_config *config = &state->dev->mode_config;
1750 int ret;
1751
1752 ret = drm_atomic_check_only(state);
1753 if (ret)
1754 return ret;
1755
1756 DRM_DEBUG_ATOMIC("committing %p\n", state);
1757
1758 return config->funcs->atomic_commit(state->dev, state, false);
1759}
1760EXPORT_SYMBOL(drm_atomic_commit);
1761
1762/**
1763 * drm_atomic_nonblocking_commit - atomic nonblocking commit
1764 * @state: atomic configuration to check
1765 *
1766 * Note that this function can return -EDEADLK if the driver needed to acquire
1767 * more locks but encountered a deadlock. The caller must then do the usual w/w
1768 * backoff dance and restart. All other errors are fatal.
1769 *
1770 * This function will take its own reference on @state.
1771 * Callers should always release their reference with drm_atomic_state_put().
1772 *
1773 * Returns:
1774 * 0 on success, negative error code on failure.
1775 */
1776int drm_atomic_nonblocking_commit(struct drm_atomic_state *state)
1777{
1778 struct drm_mode_config *config = &state->dev->mode_config;
1779 int ret;
1780
1781 ret = drm_atomic_check_only(state);
1782 if (ret)
1783 return ret;
1784
1785 DRM_DEBUG_ATOMIC("committing %p nonblocking\n", state);
1786
1787 return config->funcs->atomic_commit(state->dev, state, true);
1788}
1789EXPORT_SYMBOL(drm_atomic_nonblocking_commit);
1790
1791static void drm_atomic_print_state(const struct drm_atomic_state *state)
1792{
1793 struct drm_printer p = drm_info_printer(state->dev->dev);
1794 struct drm_plane *plane;
1795 struct drm_plane_state *plane_state;
1796 struct drm_crtc *crtc;
1797 struct drm_crtc_state *crtc_state;
1798 struct drm_connector *connector;
1799 struct drm_connector_state *connector_state;
1800 int i;
1801
1802 DRM_DEBUG_ATOMIC("checking %p\n", state);
1803
1804 for_each_new_plane_in_state(state, plane, plane_state, i)
1805 drm_atomic_plane_print_state(&p, plane_state);
1806
1807 for_each_new_crtc_in_state(state, crtc, crtc_state, i)
1808 drm_atomic_crtc_print_state(&p, crtc_state);
1809
1810 for_each_new_connector_in_state(state, connector, connector_state, i)
1811 drm_atomic_connector_print_state(&p, connector_state);
1812}
1813
1814static void __drm_state_dump(struct drm_device *dev, struct drm_printer *p,
1815 bool take_locks)
1816{
1817 struct drm_mode_config *config = &dev->mode_config;
1818 struct drm_plane *plane;
1819 struct drm_crtc *crtc;
1820 struct drm_connector *connector;
1821 struct drm_connector_list_iter conn_iter;
1822
1823 if (!drm_core_check_feature(dev, DRIVER_ATOMIC))
1824 return;
1825
1826 list_for_each_entry(plane, &config->plane_list, head) {
1827 if (take_locks)
1828 drm_modeset_lock(&plane->mutex, NULL);
1829 drm_atomic_plane_print_state(p, plane->state);
1830 if (take_locks)
1831 drm_modeset_unlock(&plane->mutex);
1832 }
1833
1834 list_for_each_entry(crtc, &config->crtc_list, head) {
1835 if (take_locks)
1836 drm_modeset_lock(&crtc->mutex, NULL);
1837 drm_atomic_crtc_print_state(p, crtc->state);
1838 if (take_locks)
1839 drm_modeset_unlock(&crtc->mutex);
1840 }
1841
1842 drm_connector_list_iter_begin(dev, &conn_iter);
1843 if (take_locks)
1844 drm_modeset_lock(&dev->mode_config.connection_mutex, NULL);
1845 drm_for_each_connector_iter(connector, &conn_iter)
1846 drm_atomic_connector_print_state(p, connector->state);
1847 if (take_locks)
1848 drm_modeset_unlock(&dev->mode_config.connection_mutex);
1849 drm_connector_list_iter_end(&conn_iter);
1850}
1851
1852/**
1853 * drm_state_dump - dump entire device atomic state
1854 * @dev: the drm device
1855 * @p: where to print the state to
1856 *
1857 * Just for debugging. Drivers might want an option to dump state
1858 * to dmesg in case of error irq's. (Hint, you probably want to
1859 * ratelimit this!)
1860 *
1861 * The caller must drm_modeset_lock_all(), or if this is called
1862 * from error irq handler, it should not be enabled by default.
1863 * (Ie. if you are debugging errors you might not care that this
1864 * is racey. But calling this without all modeset locks held is
1865 * not inherently safe.)
1866 */
1867void drm_state_dump(struct drm_device *dev, struct drm_printer *p)
1868{
1869 __drm_state_dump(dev, p, false);
1870}
1871EXPORT_SYMBOL(drm_state_dump);
1872
1873#ifdef CONFIG_DEBUG_FS
1874static int drm_state_info(struct seq_file *m, void *data)
1875{
1876 struct drm_info_node *node = (struct drm_info_node *) m->private;
1877 struct drm_device *dev = node->minor->dev;
1878 struct drm_printer p = drm_seq_file_printer(m);
1879
1880 __drm_state_dump(dev, &p, true);
1881
1882 return 0;
1883}
1884
1885/* any use in debugfs files to dump individual planes/crtc/etc? */
1886static const struct drm_info_list drm_atomic_debugfs_list[] = {
1887 {"state", drm_state_info, 0},
1888};
1889
1890int drm_atomic_debugfs_init(struct drm_minor *minor)
1891{
1892 return drm_debugfs_create_files(drm_atomic_debugfs_list,
1893 ARRAY_SIZE(drm_atomic_debugfs_list),
1894 minor->debugfs_root, minor);
1895}
1896#endif
1897
1898/*
1899 * The big monster ioctl
1900 */
1901
1902static struct drm_pending_vblank_event *create_vblank_event(
1903 struct drm_crtc *crtc, uint64_t user_data)
1904{
1905 struct drm_pending_vblank_event *e = NULL;
1906
1907 e = kzalloc(sizeof *e, GFP_KERNEL);
1908 if (!e)
1909 return NULL;
1910
1911 e->event.base.type = DRM_EVENT_FLIP_COMPLETE;
1912 e->event.base.length = sizeof(e->event);
1913 e->event.vbl.crtc_id = crtc->base.id;
1914 e->event.vbl.user_data = user_data;
1915
1916 return e;
1917}
1918
1919int drm_atomic_connector_commit_dpms(struct drm_atomic_state *state,
1920 struct drm_connector *connector,
1921 int mode)
1922{
1923 struct drm_connector *tmp_connector;
1924 struct drm_connector_state *new_conn_state;
1925 struct drm_crtc *crtc;
1926 struct drm_crtc_state *crtc_state;
1927 int i, ret, old_mode = connector->dpms;
1928 bool active = false;
1929
1930 ret = drm_modeset_lock(&state->dev->mode_config.connection_mutex,
1931 state->acquire_ctx);
1932 if (ret)
1933 return ret;
1934
1935 if (mode != DRM_MODE_DPMS_ON)
1936 mode = DRM_MODE_DPMS_OFF;
1937 connector->dpms = mode;
1938
1939 crtc = connector->state->crtc;
1940 if (!crtc)
1941 goto out;
1942 ret = drm_atomic_add_affected_connectors(state, crtc);
1943 if (ret)
1944 goto out;
1945
1946 crtc_state = drm_atomic_get_crtc_state(state, crtc);
1947 if (IS_ERR(crtc_state)) {
1948 ret = PTR_ERR(crtc_state);
1949 goto out;
1950 }
1951
1952 for_each_new_connector_in_state(state, tmp_connector, new_conn_state, i) {
1953 if (new_conn_state->crtc != crtc)
1954 continue;
1955 if (tmp_connector->dpms == DRM_MODE_DPMS_ON) {
1956 active = true;
1957 break;
1958 }
1959 }
1960
1961 crtc_state->active = active;
1962 ret = drm_atomic_commit(state);
1963out:
1964 if (ret != 0)
1965 connector->dpms = old_mode;
1966 return ret;
1967}
1968
1969int drm_atomic_set_property(struct drm_atomic_state *state,
1970 struct drm_mode_object *obj,
1971 struct drm_property *prop,
1972 uint64_t prop_value)
1973{
1974 struct drm_mode_object *ref;
1975 int ret;
1976
1977 if (!drm_property_change_valid_get(prop, prop_value, &ref))
1978 return -EINVAL;
1979
1980 switch (obj->type) {
1981 case DRM_MODE_OBJECT_CONNECTOR: {
1982 struct drm_connector *connector = obj_to_connector(obj);
1983 struct drm_connector_state *connector_state;
1984
1985 connector_state = drm_atomic_get_connector_state(state, connector);
1986 if (IS_ERR(connector_state)) {
1987 ret = PTR_ERR(connector_state);
1988 break;
1989 }
1990
1991 ret = drm_atomic_connector_set_property(connector,
1992 connector_state, prop, prop_value);
1993 break;
1994 }
1995 case DRM_MODE_OBJECT_CRTC: {
1996 struct drm_crtc *crtc = obj_to_crtc(obj);
1997 struct drm_crtc_state *crtc_state;
1998
1999 crtc_state = drm_atomic_get_crtc_state(state, crtc);
2000 if (IS_ERR(crtc_state)) {
2001 ret = PTR_ERR(crtc_state);
2002 break;
2003 }
2004
2005 ret = drm_atomic_crtc_set_property(crtc,
2006 crtc_state, prop, prop_value);
2007 break;
2008 }
2009 case DRM_MODE_OBJECT_PLANE: {
2010 struct drm_plane *plane = obj_to_plane(obj);
2011 struct drm_plane_state *plane_state;
2012
2013 plane_state = drm_atomic_get_plane_state(state, plane);
2014 if (IS_ERR(plane_state)) {
2015 ret = PTR_ERR(plane_state);
2016 break;
2017 }
2018
2019 ret = drm_atomic_plane_set_property(plane,
2020 plane_state, prop, prop_value);
2021 break;
2022 }
2023 default:
2024 ret = -EINVAL;
2025 break;
2026 }
2027
2028 drm_property_change_valid_put(prop, ref);
2029 return ret;
2030}
2031
2032/**
2033 * drm_atomic_clean_old_fb -- Unset old_fb pointers and set plane->fb pointers.
2034 *
2035 * @dev: drm device to check.
2036 * @plane_mask: plane mask for planes that were updated.
2037 * @ret: return value, can be -EDEADLK for a retry.
2038 *
2039 * Before doing an update &drm_plane.old_fb is set to &drm_plane.fb, but before
2040 * dropping the locks old_fb needs to be set to NULL and plane->fb updated. This
2041 * is a common operation for each atomic update, so this call is split off as a
2042 * helper.
2043 */
2044void drm_atomic_clean_old_fb(struct drm_device *dev,
2045 unsigned plane_mask,
2046 int ret)
2047{
2048 struct drm_plane *plane;
2049
2050 /* if succeeded, fixup legacy plane crtc/fb ptrs before dropping
2051 * locks (ie. while it is still safe to deref plane->state). We
2052 * need to do this here because the driver entry points cannot
2053 * distinguish between legacy and atomic ioctls.
2054 */
2055 drm_for_each_plane_mask(plane, dev, plane_mask) {
2056 if (ret == 0) {
2057 struct drm_framebuffer *new_fb = plane->state->fb;
2058 if (new_fb)
2059 drm_framebuffer_get(new_fb);
2060 plane->fb = new_fb;
2061 plane->crtc = plane->state->crtc;
2062
2063 if (plane->old_fb)
2064 drm_framebuffer_put(plane->old_fb);
2065 }
2066 plane->old_fb = NULL;
2067 }
2068}
2069EXPORT_SYMBOL(drm_atomic_clean_old_fb);
2070
2071/**
2072 * DOC: explicit fencing properties
2073 *
2074 * Explicit fencing allows userspace to control the buffer synchronization
2075 * between devices. A Fence or a group of fences are transfered to/from
2076 * userspace using Sync File fds and there are two DRM properties for that.
2077 * IN_FENCE_FD on each DRM Plane to send fences to the kernel and
2078 * OUT_FENCE_PTR on each DRM CRTC to receive fences from the kernel.
2079 *
2080 * As a contrast, with implicit fencing the kernel keeps track of any
2081 * ongoing rendering, and automatically ensures that the atomic update waits
2082 * for any pending rendering to complete. For shared buffers represented with
2083 * a &struct dma_buf this is tracked in &struct reservation_object.
2084 * Implicit syncing is how Linux traditionally worked (e.g. DRI2/3 on X.org),
2085 * whereas explicit fencing is what Android wants.
2086 *
2087 * "IN_FENCE_FD”:
2088 * Use this property to pass a fence that DRM should wait on before
2089 * proceeding with the Atomic Commit request and show the framebuffer for
2090 * the plane on the screen. The fence can be either a normal fence or a
2091 * merged one, the sync_file framework will handle both cases and use a
2092 * fence_array if a merged fence is received. Passing -1 here means no
2093 * fences to wait on.
2094 *
2095 * If the Atomic Commit request has the DRM_MODE_ATOMIC_TEST_ONLY flag
2096 * it will only check if the Sync File is a valid one.
2097 *
2098 * On the driver side the fence is stored on the @fence parameter of
2099 * &struct drm_plane_state. Drivers which also support implicit fencing
2100 * should set the implicit fence using drm_atomic_set_fence_for_plane(),
2101 * to make sure there's consistent behaviour between drivers in precedence
2102 * of implicit vs. explicit fencing.
2103 *
2104 * "OUT_FENCE_PTR”:
2105 * Use this property to pass a file descriptor pointer to DRM. Once the
2106 * Atomic Commit request call returns OUT_FENCE_PTR will be filled with
2107 * the file descriptor number of a Sync File. This Sync File contains the
2108 * CRTC fence that will be signaled when all framebuffers present on the
2109 * Atomic Commit * request for that given CRTC are scanned out on the
2110 * screen.
2111 *
2112 * The Atomic Commit request fails if a invalid pointer is passed. If the
2113 * Atomic Commit request fails for any other reason the out fence fd
2114 * returned will be -1. On a Atomic Commit with the
2115 * DRM_MODE_ATOMIC_TEST_ONLY flag the out fence will also be set to -1.
2116 *
2117 * Note that out-fences don't have a special interface to drivers and are
2118 * internally represented by a &struct drm_pending_vblank_event in struct
2119 * &drm_crtc_state, which is also used by the nonblocking atomic commit
2120 * helpers and for the DRM event handling for existing userspace.
2121 */
2122
2123struct drm_out_fence_state {
2124 s32 __user *out_fence_ptr;
2125 struct sync_file *sync_file;
2126 int fd;
2127};
2128
2129static int setup_out_fence(struct drm_out_fence_state *fence_state,
2130 struct dma_fence *fence)
2131{
2132 fence_state->fd = get_unused_fd_flags(O_CLOEXEC);
2133 if (fence_state->fd < 0)
2134 return fence_state->fd;
2135
2136 if (put_user(fence_state->fd, fence_state->out_fence_ptr))
2137 return -EFAULT;
2138
2139 fence_state->sync_file = sync_file_create(fence);
2140 if (!fence_state->sync_file)
2141 return -ENOMEM;
2142
2143 return 0;
2144}
2145
2146static int prepare_crtc_signaling(struct drm_device *dev,
2147 struct drm_atomic_state *state,
2148 struct drm_mode_atomic *arg,
2149 struct drm_file *file_priv,
2150 struct drm_out_fence_state **fence_state,
2151 unsigned int *num_fences)
2152{
2153 struct drm_crtc *crtc;
2154 struct drm_crtc_state *crtc_state;
2155 int i, c = 0, ret;
2156
2157 if (arg->flags & DRM_MODE_ATOMIC_TEST_ONLY)
2158 return 0;
2159
2160 for_each_new_crtc_in_state(state, crtc, crtc_state, i) {
2161 s32 __user *fence_ptr;
2162
2163 fence_ptr = get_out_fence_for_crtc(crtc_state->state, crtc);
2164
2165 if (arg->flags & DRM_MODE_PAGE_FLIP_EVENT || fence_ptr) {
2166 struct drm_pending_vblank_event *e;
2167
2168 e = create_vblank_event(crtc, arg->user_data);
2169 if (!e)
2170 return -ENOMEM;
2171
2172 crtc_state->event = e;
2173 }
2174
2175 if (arg->flags & DRM_MODE_PAGE_FLIP_EVENT) {
2176 struct drm_pending_vblank_event *e = crtc_state->event;
2177
2178 if (!file_priv)
2179 continue;
2180
2181 ret = drm_event_reserve_init(dev, file_priv, &e->base,
2182 &e->event.base);
2183 if (ret) {
2184 kfree(e);
2185 crtc_state->event = NULL;
2186 return ret;
2187 }
2188 }
2189
2190 if (fence_ptr) {
2191 struct dma_fence *fence;
2192 struct drm_out_fence_state *f;
2193
2194 f = krealloc(*fence_state, sizeof(**fence_state) *
2195 (*num_fences + 1), GFP_KERNEL);
2196 if (!f)
2197 return -ENOMEM;
2198
2199 memset(&f[*num_fences], 0, sizeof(*f));
2200
2201 f[*num_fences].out_fence_ptr = fence_ptr;
2202 *fence_state = f;
2203
2204 fence = drm_crtc_create_fence(crtc);
2205 if (!fence)
2206 return -ENOMEM;
2207
2208 ret = setup_out_fence(&f[(*num_fences)++], fence);
2209 if (ret) {
2210 dma_fence_put(fence);
2211 return ret;
2212 }
2213
2214 crtc_state->event->base.fence = fence;
2215 }
2216
2217 c++;
2218 }
2219
2220 /*
2221 * Having this flag means user mode pends on event which will never
2222 * reach due to lack of at least one CRTC for signaling
2223 */
2224 if (c == 0 && (arg->flags & DRM_MODE_PAGE_FLIP_EVENT))
2225 return -EINVAL;
2226
2227 return 0;
2228}
2229
2230static void complete_crtc_signaling(struct drm_device *dev,
2231 struct drm_atomic_state *state,
2232 struct drm_out_fence_state *fence_state,
2233 unsigned int num_fences,
2234 bool install_fds)
2235{
2236 struct drm_crtc *crtc;
2237 struct drm_crtc_state *crtc_state;
2238 int i;
2239
2240 if (install_fds) {
2241 for (i = 0; i < num_fences; i++)
2242 fd_install(fence_state[i].fd,
2243 fence_state[i].sync_file->file);
2244
2245 kfree(fence_state);
2246 return;
2247 }
2248
2249 for_each_new_crtc_in_state(state, crtc, crtc_state, i) {
2250 struct drm_pending_vblank_event *event = crtc_state->event;
2251 /*
2252 * Free the allocated event. drm_atomic_helper_setup_commit
2253 * can allocate an event too, so only free it if it's ours
2254 * to prevent a double free in drm_atomic_state_clear.
2255 */
2256 if (event && (event->base.fence || event->base.file_priv)) {
2257 drm_event_cancel_free(dev, &event->base);
2258 crtc_state->event = NULL;
2259 }
2260 }
2261
2262 if (!fence_state)
2263 return;
2264
2265 for (i = 0; i < num_fences; i++) {
2266 if (fence_state[i].sync_file)
2267 fput(fence_state[i].sync_file->file);
2268 if (fence_state[i].fd >= 0)
2269 put_unused_fd(fence_state[i].fd);
2270
2271 /* If this fails log error to the user */
2272 if (fence_state[i].out_fence_ptr &&
2273 put_user(-1, fence_state[i].out_fence_ptr))
2274 DRM_DEBUG_ATOMIC("Couldn't clear out_fence_ptr\n");
2275 }
2276
2277 kfree(fence_state);
2278}
2279
2280int drm_mode_atomic_ioctl(struct drm_device *dev,
2281 void *data, struct drm_file *file_priv)
2282{
2283 struct drm_mode_atomic *arg = data;
2284 uint32_t __user *objs_ptr = (uint32_t __user *)(unsigned long)(arg->objs_ptr);
2285 uint32_t __user *count_props_ptr = (uint32_t __user *)(unsigned long)(arg->count_props_ptr);
2286 uint32_t __user *props_ptr = (uint32_t __user *)(unsigned long)(arg->props_ptr);
2287 uint64_t __user *prop_values_ptr = (uint64_t __user *)(unsigned long)(arg->prop_values_ptr);
2288 unsigned int copied_objs, copied_props;
2289 struct drm_atomic_state *state;
2290 struct drm_modeset_acquire_ctx ctx;
2291 struct drm_plane *plane;
2292 struct drm_out_fence_state *fence_state;
2293 unsigned plane_mask;
2294 int ret = 0;
2295 unsigned int i, j, num_fences;
2296
2297 /* disallow for drivers not supporting atomic: */
2298 if (!drm_core_check_feature(dev, DRIVER_ATOMIC))
2299 return -EINVAL;
2300
2301 /* disallow for userspace that has not enabled atomic cap (even
2302 * though this may be a bit overkill, since legacy userspace
2303 * wouldn't know how to call this ioctl)
2304 */
2305 if (!file_priv->atomic)
2306 return -EINVAL;
2307
2308 if (arg->flags & ~DRM_MODE_ATOMIC_FLAGS)
2309 return -EINVAL;
2310
2311 if (arg->reserved)
2312 return -EINVAL;
2313
2314 if ((arg->flags & DRM_MODE_PAGE_FLIP_ASYNC) &&
2315 !dev->mode_config.async_page_flip)
2316 return -EINVAL;
2317
2318 /* can't test and expect an event at the same time. */
2319 if ((arg->flags & DRM_MODE_ATOMIC_TEST_ONLY) &&
2320 (arg->flags & DRM_MODE_PAGE_FLIP_EVENT))
2321 return -EINVAL;
2322
2323 drm_modeset_acquire_init(&ctx, DRM_MODESET_ACQUIRE_INTERRUPTIBLE);
2324
2325 state = drm_atomic_state_alloc(dev);
2326 if (!state)
2327 return -ENOMEM;
2328
2329 state->acquire_ctx = &ctx;
2330 state->allow_modeset = !!(arg->flags & DRM_MODE_ATOMIC_ALLOW_MODESET);
2331
2332retry:
2333 plane_mask = 0;
2334 copied_objs = 0;
2335 copied_props = 0;
2336 fence_state = NULL;
2337 num_fences = 0;
2338
2339 for (i = 0; i < arg->count_objs; i++) {
2340 uint32_t obj_id, count_props;
2341 struct drm_mode_object *obj;
2342
2343 if (get_user(obj_id, objs_ptr + copied_objs)) {
2344 ret = -EFAULT;
2345 goto out;
2346 }
2347
2348 obj = drm_mode_object_find(dev, file_priv, obj_id, DRM_MODE_OBJECT_ANY);
2349 if (!obj) {
2350 ret = -ENOENT;
2351 goto out;
2352 }
2353
2354 if (!obj->properties) {
2355 drm_mode_object_put(obj);
2356 ret = -ENOENT;
2357 goto out;
2358 }
2359
2360 if (get_user(count_props, count_props_ptr + copied_objs)) {
2361 drm_mode_object_put(obj);
2362 ret = -EFAULT;
2363 goto out;
2364 }
2365
2366 copied_objs++;
2367
2368 for (j = 0; j < count_props; j++) {
2369 uint32_t prop_id;
2370 uint64_t prop_value;
2371 struct drm_property *prop;
2372
2373 if (get_user(prop_id, props_ptr + copied_props)) {
2374 drm_mode_object_put(obj);
2375 ret = -EFAULT;
2376 goto out;
2377 }
2378
2379 prop = drm_mode_obj_find_prop_id(obj, prop_id);
2380 if (!prop) {
2381 drm_mode_object_put(obj);
2382 ret = -ENOENT;
2383 goto out;
2384 }
2385
2386 if (copy_from_user(&prop_value,
2387 prop_values_ptr + copied_props,
2388 sizeof(prop_value))) {
2389 drm_mode_object_put(obj);
2390 ret = -EFAULT;
2391 goto out;
2392 }
2393
2394 ret = drm_atomic_set_property(state, obj, prop,
2395 prop_value);
2396 if (ret) {
2397 drm_mode_object_put(obj);
2398 goto out;
2399 }
2400
2401 copied_props++;
2402 }
2403
2404 if (obj->type == DRM_MODE_OBJECT_PLANE && count_props &&
2405 !(arg->flags & DRM_MODE_ATOMIC_TEST_ONLY)) {
2406 plane = obj_to_plane(obj);
2407 plane_mask |= (1 << drm_plane_index(plane));
2408 plane->old_fb = plane->fb;
2409 }
2410 drm_mode_object_put(obj);
2411 }
2412
2413 ret = prepare_crtc_signaling(dev, state, arg, file_priv, &fence_state,
2414 &num_fences);
2415 if (ret)
2416 goto out;
2417
2418 if (arg->flags & DRM_MODE_ATOMIC_TEST_ONLY) {
2419 ret = drm_atomic_check_only(state);
2420 } else if (arg->flags & DRM_MODE_ATOMIC_NONBLOCK) {
2421 ret = drm_atomic_nonblocking_commit(state);
2422 } else {
2423 if (unlikely(drm_debug & DRM_UT_STATE))
2424 drm_atomic_print_state(state);
2425
2426 ret = drm_atomic_commit(state);
2427 }
2428
2429out:
2430 drm_atomic_clean_old_fb(dev, plane_mask, ret);
2431
2432 complete_crtc_signaling(dev, state, fence_state, num_fences, !ret);
2433
2434 if (ret == -EDEADLK) {
2435 drm_atomic_state_clear(state);
2436 ret = drm_modeset_backoff(&ctx);
2437 if (!ret)
2438 goto retry;
2439 }
2440
2441 drm_atomic_state_put(state);
2442
2443 drm_modeset_drop_locks(&ctx);
2444 drm_modeset_acquire_fini(&ctx);
2445
2446 return ret;
2447}