2 * Copyright (C) 2014 Red Hat
3 * Copyright (C) 2014 Intel Corp.
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:
12 * The above copyright notice and this permission notice shall be included in
13 * all copies or substantial portions of the Software.
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.
24 * Rob Clark <robdclark@gmail.com>
25 * Daniel Vetter <daniel.vetter@ffwll.ch>
29 #include <linux/sync_file.h>
31 #include <drm/drm_atomic.h>
32 #include <drm/drm_atomic_uapi.h>
33 #include <drm/drm_debugfs.h>
34 #include <drm/drm_device.h>
35 #include <drm/drm_drv.h>
36 #include <drm/drm_file.h>
37 #include <drm/drm_fourcc.h>
38 #include <drm/drm_mode.h>
39 #include <drm/drm_print.h>
40 #include <drm/drm_writeback.h>
42 #include "drm_crtc_internal.h"
43 #include "drm_internal.h"
45 void __drm_crtc_commit_free(struct kref *kref)
47 struct drm_crtc_commit *commit =
48 container_of(kref, struct drm_crtc_commit, ref);
52 EXPORT_SYMBOL(__drm_crtc_commit_free);
55 * drm_atomic_state_default_release -
56 * release memory initialized by drm_atomic_state_init
57 * @state: atomic state
59 * Free all the memory allocated by drm_atomic_state_init.
60 * This should only be used by drivers which are still subclassing
61 * &drm_atomic_state and haven't switched to &drm_private_state yet.
63 void drm_atomic_state_default_release(struct drm_atomic_state *state)
65 kfree(state->connectors);
68 kfree(state->private_objs);
70 EXPORT_SYMBOL(drm_atomic_state_default_release);
73 * drm_atomic_state_init - init new atomic state
75 * @state: atomic state
77 * Default implementation for filling in a new atomic state.
78 * This should only be used by drivers which are still subclassing
79 * &drm_atomic_state and haven't switched to &drm_private_state yet.
82 drm_atomic_state_init(struct drm_device *dev, struct drm_atomic_state *state)
84 kref_init(&state->ref);
86 /* TODO legacy paths should maybe do a better job about
87 * setting this appropriately?
89 state->allow_modeset = true;
91 state->crtcs = kcalloc(dev->mode_config.num_crtc,
92 sizeof(*state->crtcs), GFP_KERNEL);
95 state->planes = kcalloc(dev->mode_config.num_total_plane,
96 sizeof(*state->planes), GFP_KERNEL);
102 DRM_DEBUG_ATOMIC("Allocated atomic state %p\n", state);
106 drm_atomic_state_default_release(state);
109 EXPORT_SYMBOL(drm_atomic_state_init);
112 * drm_atomic_state_alloc - allocate atomic state
115 * This allocates an empty atomic state to track updates.
117 struct drm_atomic_state *
118 drm_atomic_state_alloc(struct drm_device *dev)
120 struct drm_mode_config *config = &dev->mode_config;
122 if (!config->funcs->atomic_state_alloc) {
123 struct drm_atomic_state *state;
125 state = kzalloc(sizeof(*state), GFP_KERNEL);
128 if (drm_atomic_state_init(dev, state) < 0) {
135 return config->funcs->atomic_state_alloc(dev);
137 EXPORT_SYMBOL(drm_atomic_state_alloc);
140 * drm_atomic_state_default_clear - clear base atomic state
141 * @state: atomic state
143 * Default implementation for clearing atomic state.
144 * This should only be used by drivers which are still subclassing
145 * &drm_atomic_state and haven't switched to &drm_private_state yet.
147 void drm_atomic_state_default_clear(struct drm_atomic_state *state)
149 struct drm_device *dev = state->dev;
150 struct drm_mode_config *config = &dev->mode_config;
153 DRM_DEBUG_ATOMIC("Clearing atomic state %p\n", state);
155 for (i = 0; i < state->num_connector; i++) {
156 struct drm_connector *connector = state->connectors[i].ptr;
161 connector->funcs->atomic_destroy_state(connector,
162 state->connectors[i].state);
163 state->connectors[i].ptr = NULL;
164 state->connectors[i].state = NULL;
165 state->connectors[i].old_state = NULL;
166 state->connectors[i].new_state = NULL;
167 drm_connector_put(connector);
170 for (i = 0; i < config->num_crtc; i++) {
171 struct drm_crtc *crtc = state->crtcs[i].ptr;
176 crtc->funcs->atomic_destroy_state(crtc,
177 state->crtcs[i].state);
179 state->crtcs[i].ptr = NULL;
180 state->crtcs[i].state = NULL;
181 state->crtcs[i].old_state = NULL;
182 state->crtcs[i].new_state = NULL;
184 if (state->crtcs[i].commit) {
185 drm_crtc_commit_put(state->crtcs[i].commit);
186 state->crtcs[i].commit = NULL;
190 for (i = 0; i < config->num_total_plane; i++) {
191 struct drm_plane *plane = state->planes[i].ptr;
196 plane->funcs->atomic_destroy_state(plane,
197 state->planes[i].state);
198 state->planes[i].ptr = NULL;
199 state->planes[i].state = NULL;
200 state->planes[i].old_state = NULL;
201 state->planes[i].new_state = NULL;
204 for (i = 0; i < state->num_private_objs; i++) {
205 struct drm_private_obj *obj = state->private_objs[i].ptr;
207 obj->funcs->atomic_destroy_state(obj,
208 state->private_objs[i].state);
209 state->private_objs[i].ptr = NULL;
210 state->private_objs[i].state = NULL;
211 state->private_objs[i].old_state = NULL;
212 state->private_objs[i].new_state = NULL;
214 state->num_private_objs = 0;
216 if (state->fake_commit) {
217 drm_crtc_commit_put(state->fake_commit);
218 state->fake_commit = NULL;
221 EXPORT_SYMBOL(drm_atomic_state_default_clear);
224 * drm_atomic_state_clear - clear state object
225 * @state: atomic state
227 * When the w/w mutex algorithm detects a deadlock we need to back off and drop
228 * all locks. So someone else could sneak in and change the current modeset
229 * configuration. Which means that all the state assembled in @state is no
230 * longer an atomic update to the current state, but to some arbitrary earlier
231 * state. Which could break assumptions the driver's
232 * &drm_mode_config_funcs.atomic_check likely relies on.
234 * Hence we must clear all cached state and completely start over, using this
237 void drm_atomic_state_clear(struct drm_atomic_state *state)
239 struct drm_device *dev = state->dev;
240 struct drm_mode_config *config = &dev->mode_config;
242 if (config->funcs->atomic_state_clear)
243 config->funcs->atomic_state_clear(state);
245 drm_atomic_state_default_clear(state);
247 EXPORT_SYMBOL(drm_atomic_state_clear);
250 * __drm_atomic_state_free - free all memory for an atomic state
251 * @ref: This atomic state to deallocate
253 * This frees all memory associated with an atomic state, including all the
254 * per-object state for planes, crtcs and connectors.
256 void __drm_atomic_state_free(struct kref *ref)
258 struct drm_atomic_state *state = container_of(ref, typeof(*state), ref);
259 struct drm_mode_config *config = &state->dev->mode_config;
261 drm_atomic_state_clear(state);
263 DRM_DEBUG_ATOMIC("Freeing atomic state %p\n", state);
265 if (config->funcs->atomic_state_free) {
266 config->funcs->atomic_state_free(state);
268 drm_atomic_state_default_release(state);
272 EXPORT_SYMBOL(__drm_atomic_state_free);
275 * drm_atomic_get_crtc_state - get crtc state
276 * @state: global atomic state object
277 * @crtc: crtc to get state object for
279 * This function returns the crtc state for the given crtc, allocating it if
280 * needed. It will also grab the relevant crtc lock to make sure that the state
285 * Either the allocated state or the error code encoded into the pointer. When
286 * the error is EDEADLK then the w/w mutex code has detected a deadlock and the
287 * entire atomic sequence must be restarted. All other errors are fatal.
289 struct drm_crtc_state *
290 drm_atomic_get_crtc_state(struct drm_atomic_state *state,
291 struct drm_crtc *crtc)
293 int ret, index = drm_crtc_index(crtc);
294 struct drm_crtc_state *crtc_state;
296 WARN_ON(!state->acquire_ctx);
298 crtc_state = drm_atomic_get_existing_crtc_state(state, crtc);
302 ret = drm_modeset_lock(&crtc->mutex, state->acquire_ctx);
306 crtc_state = crtc->funcs->atomic_duplicate_state(crtc);
308 return ERR_PTR(-ENOMEM);
310 state->crtcs[index].state = crtc_state;
311 state->crtcs[index].old_state = crtc->state;
312 state->crtcs[index].new_state = crtc_state;
313 state->crtcs[index].ptr = crtc;
314 crtc_state->state = state;
316 DRM_DEBUG_ATOMIC("Added [CRTC:%d:%s] %p state to %p\n",
317 crtc->base.id, crtc->name, crtc_state, state);
321 EXPORT_SYMBOL(drm_atomic_get_crtc_state);
323 static int drm_atomic_crtc_check(const struct drm_crtc_state *old_crtc_state,
324 const struct drm_crtc_state *new_crtc_state)
326 struct drm_crtc *crtc = new_crtc_state->crtc;
328 /* NOTE: we explicitly don't enforce constraints such as primary
329 * layer covering entire screen, since that is something we want
330 * to allow (on hw that supports it). For hw that does not, it
331 * should be checked in driver's crtc->atomic_check() vfunc.
333 * TODO: Add generic modeset state checks once we support those.
336 if (new_crtc_state->active && !new_crtc_state->enable) {
337 DRM_DEBUG_ATOMIC("[CRTC:%d:%s] active without enabled\n",
338 crtc->base.id, crtc->name);
342 /* The state->enable vs. state->mode_blob checks can be WARN_ON,
343 * as this is a kernel-internal detail that userspace should never
344 * be able to trigger. */
345 if (drm_core_check_feature(crtc->dev, DRIVER_ATOMIC) &&
346 WARN_ON(new_crtc_state->enable && !new_crtc_state->mode_blob)) {
347 DRM_DEBUG_ATOMIC("[CRTC:%d:%s] enabled without mode blob\n",
348 crtc->base.id, crtc->name);
352 if (drm_core_check_feature(crtc->dev, DRIVER_ATOMIC) &&
353 WARN_ON(!new_crtc_state->enable && new_crtc_state->mode_blob)) {
354 DRM_DEBUG_ATOMIC("[CRTC:%d:%s] disabled with mode blob\n",
355 crtc->base.id, crtc->name);
360 * Reject event generation for when a CRTC is off and stays off.
361 * It wouldn't be hard to implement this, but userspace has a track
362 * record of happily burning through 100% cpu (or worse, crash) when the
363 * display pipe is suspended. To avoid all that fun just reject updates
364 * that ask for events since likely that indicates a bug in the
365 * compositor's drawing loop. This is consistent with the vblank IOCTL
366 * and legacy page_flip IOCTL which also reject service on a disabled
369 if (new_crtc_state->event &&
370 !new_crtc_state->active && !old_crtc_state->active) {
371 DRM_DEBUG_ATOMIC("[CRTC:%d:%s] requesting event but off\n",
372 crtc->base.id, crtc->name);
379 static void drm_atomic_crtc_print_state(struct drm_printer *p,
380 const struct drm_crtc_state *state)
382 struct drm_crtc *crtc = state->crtc;
384 drm_printf(p, "crtc[%u]: %s\n", crtc->base.id, crtc->name);
385 drm_printf(p, "\tenable=%d\n", state->enable);
386 drm_printf(p, "\tactive=%d\n", state->active);
387 drm_printf(p, "\tplanes_changed=%d\n", state->planes_changed);
388 drm_printf(p, "\tmode_changed=%d\n", state->mode_changed);
389 drm_printf(p, "\tactive_changed=%d\n", state->active_changed);
390 drm_printf(p, "\tconnectors_changed=%d\n", state->connectors_changed);
391 drm_printf(p, "\tcolor_mgmt_changed=%d\n", state->color_mgmt_changed);
392 drm_printf(p, "\tplane_mask=%x\n", state->plane_mask);
393 drm_printf(p, "\tconnector_mask=%x\n", state->connector_mask);
394 drm_printf(p, "\tencoder_mask=%x\n", state->encoder_mask);
395 drm_printf(p, "\tmode: " DRM_MODE_FMT "\n", DRM_MODE_ARG(&state->mode));
397 if (crtc->funcs->atomic_print_state)
398 crtc->funcs->atomic_print_state(p, state);
401 static int drm_atomic_connector_check(struct drm_connector *connector,
402 struct drm_connector_state *state)
404 struct drm_crtc_state *crtc_state;
405 struct drm_writeback_job *writeback_job = state->writeback_job;
406 const struct drm_display_info *info = &connector->display_info;
408 state->max_bpc = info->bpc ? info->bpc : 8;
409 if (connector->max_bpc_property)
410 state->max_bpc = min(state->max_bpc, state->max_requested_bpc);
412 if ((connector->connector_type != DRM_MODE_CONNECTOR_WRITEBACK) || !writeback_job)
415 if (writeback_job->fb && !state->crtc) {
416 DRM_DEBUG_ATOMIC("[CONNECTOR:%d:%s] framebuffer without CRTC\n",
417 connector->base.id, connector->name);
422 crtc_state = drm_atomic_get_existing_crtc_state(state->state,
425 if (writeback_job->fb && !crtc_state->active) {
426 DRM_DEBUG_ATOMIC("[CONNECTOR:%d:%s] has framebuffer, but [CRTC:%d] is off\n",
427 connector->base.id, connector->name,
428 state->crtc->base.id);
432 if (writeback_job->out_fence && !writeback_job->fb) {
433 DRM_DEBUG_ATOMIC("[CONNECTOR:%d:%s] requesting out-fence without framebuffer\n",
434 connector->base.id, connector->name);
442 * drm_atomic_get_plane_state - get plane state
443 * @state: global atomic state object
444 * @plane: plane to get state object for
446 * This function returns the plane state for the given plane, allocating it if
447 * needed. It will also grab the relevant plane lock to make sure that the state
452 * Either the allocated state or the error code encoded into the pointer. When
453 * the error is EDEADLK then the w/w mutex code has detected a deadlock and the
454 * entire atomic sequence must be restarted. All other errors are fatal.
456 struct drm_plane_state *
457 drm_atomic_get_plane_state(struct drm_atomic_state *state,
458 struct drm_plane *plane)
460 int ret, index = drm_plane_index(plane);
461 struct drm_plane_state *plane_state;
463 WARN_ON(!state->acquire_ctx);
465 /* the legacy pointers should never be set */
467 WARN_ON(plane->old_fb);
468 WARN_ON(plane->crtc);
470 plane_state = drm_atomic_get_existing_plane_state(state, plane);
474 ret = drm_modeset_lock(&plane->mutex, state->acquire_ctx);
478 plane_state = plane->funcs->atomic_duplicate_state(plane);
480 return ERR_PTR(-ENOMEM);
482 state->planes[index].state = plane_state;
483 state->planes[index].ptr = plane;
484 state->planes[index].old_state = plane->state;
485 state->planes[index].new_state = plane_state;
486 plane_state->state = state;
488 DRM_DEBUG_ATOMIC("Added [PLANE:%d:%s] %p state to %p\n",
489 plane->base.id, plane->name, plane_state, state);
491 if (plane_state->crtc) {
492 struct drm_crtc_state *crtc_state;
494 crtc_state = drm_atomic_get_crtc_state(state,
496 if (IS_ERR(crtc_state))
497 return ERR_CAST(crtc_state);
502 EXPORT_SYMBOL(drm_atomic_get_plane_state);
505 plane_switching_crtc(const struct drm_plane_state *old_plane_state,
506 const struct drm_plane_state *new_plane_state)
508 if (!old_plane_state->crtc || !new_plane_state->crtc)
511 if (old_plane_state->crtc == new_plane_state->crtc)
514 /* This could be refined, but currently there's no helper or driver code
515 * to implement direct switching of active planes nor userspace to take
516 * advantage of more direct plane switching without the intermediate
523 * drm_atomic_plane_check - check plane state
524 * @old_plane_state: old plane state to check
525 * @new_plane_state: new plane state to check
527 * Provides core sanity checks for plane state.
530 * Zero on success, error code on failure
532 static int drm_atomic_plane_check(const struct drm_plane_state *old_plane_state,
533 const struct drm_plane_state *new_plane_state)
535 struct drm_plane *plane = new_plane_state->plane;
536 struct drm_crtc *crtc = new_plane_state->crtc;
537 const struct drm_framebuffer *fb = new_plane_state->fb;
538 unsigned int fb_width, fb_height;
539 struct drm_mode_rect *clips;
543 /* either *both* CRTC and FB must be set, or neither */
545 DRM_DEBUG_ATOMIC("[PLANE:%d:%s] CRTC set but no FB\n",
546 plane->base.id, plane->name);
548 } else if (fb && !crtc) {
549 DRM_DEBUG_ATOMIC("[PLANE:%d:%s] FB set but no CRTC\n",
550 plane->base.id, plane->name);
554 /* if disabled, we don't care about the rest of the state: */
558 /* Check whether this plane is usable on this CRTC */
559 if (!(plane->possible_crtcs & drm_crtc_mask(crtc))) {
560 DRM_DEBUG_ATOMIC("Invalid [CRTC:%d:%s] for [PLANE:%d:%s]\n",
561 crtc->base.id, crtc->name,
562 plane->base.id, plane->name);
566 /* Check whether this plane supports the fb pixel format. */
567 ret = drm_plane_check_pixel_format(plane, fb->format->format,
570 struct drm_format_name_buf format_name;
571 DRM_DEBUG_ATOMIC("[PLANE:%d:%s] invalid pixel format %s, modifier 0x%llx\n",
572 plane->base.id, plane->name,
573 drm_get_format_name(fb->format->format,
579 /* Give drivers some help against integer overflows */
580 if (new_plane_state->crtc_w > INT_MAX ||
581 new_plane_state->crtc_x > INT_MAX - (int32_t) new_plane_state->crtc_w ||
582 new_plane_state->crtc_h > INT_MAX ||
583 new_plane_state->crtc_y > INT_MAX - (int32_t) new_plane_state->crtc_h) {
584 DRM_DEBUG_ATOMIC("[PLANE:%d:%s] invalid CRTC coordinates %ux%u+%d+%d\n",
585 plane->base.id, plane->name,
586 new_plane_state->crtc_w, new_plane_state->crtc_h,
587 new_plane_state->crtc_x, new_plane_state->crtc_y);
591 fb_width = fb->width << 16;
592 fb_height = fb->height << 16;
594 /* Make sure source coordinates are inside the fb. */
595 if (new_plane_state->src_w > fb_width ||
596 new_plane_state->src_x > fb_width - new_plane_state->src_w ||
597 new_plane_state->src_h > fb_height ||
598 new_plane_state->src_y > fb_height - new_plane_state->src_h) {
599 DRM_DEBUG_ATOMIC("[PLANE:%d:%s] invalid source coordinates "
600 "%u.%06ux%u.%06u+%u.%06u+%u.%06u (fb %ux%u)\n",
601 plane->base.id, plane->name,
602 new_plane_state->src_w >> 16,
603 ((new_plane_state->src_w & 0xffff) * 15625) >> 10,
604 new_plane_state->src_h >> 16,
605 ((new_plane_state->src_h & 0xffff) * 15625) >> 10,
606 new_plane_state->src_x >> 16,
607 ((new_plane_state->src_x & 0xffff) * 15625) >> 10,
608 new_plane_state->src_y >> 16,
609 ((new_plane_state->src_y & 0xffff) * 15625) >> 10,
610 fb->width, fb->height);
614 clips = drm_plane_get_damage_clips(new_plane_state);
615 num_clips = drm_plane_get_damage_clips_count(new_plane_state);
617 /* Make sure damage clips are valid and inside the fb. */
618 while (num_clips > 0) {
619 if (clips->x1 >= clips->x2 ||
620 clips->y1 >= clips->y2 ||
623 clips->x2 > fb_width ||
624 clips->y2 > fb_height) {
625 DRM_DEBUG_ATOMIC("[PLANE:%d:%s] invalid damage clip %d %d %d %d\n",
626 plane->base.id, plane->name, clips->x1,
627 clips->y1, clips->x2, clips->y2);
634 if (plane_switching_crtc(old_plane_state, new_plane_state)) {
635 DRM_DEBUG_ATOMIC("[PLANE:%d:%s] switching CRTC directly\n",
636 plane->base.id, plane->name);
643 static void drm_atomic_plane_print_state(struct drm_printer *p,
644 const struct drm_plane_state *state)
646 struct drm_plane *plane = state->plane;
647 struct drm_rect src = drm_plane_state_src(state);
648 struct drm_rect dest = drm_plane_state_dest(state);
650 drm_printf(p, "plane[%u]: %s\n", plane->base.id, plane->name);
651 drm_printf(p, "\tcrtc=%s\n", state->crtc ? state->crtc->name : "(null)");
652 drm_printf(p, "\tfb=%u\n", state->fb ? state->fb->base.id : 0);
654 drm_framebuffer_print_info(p, 2, state->fb);
655 drm_printf(p, "\tcrtc-pos=" DRM_RECT_FMT "\n", DRM_RECT_ARG(&dest));
656 drm_printf(p, "\tsrc-pos=" DRM_RECT_FP_FMT "\n", DRM_RECT_FP_ARG(&src));
657 drm_printf(p, "\trotation=%x\n", state->rotation);
658 drm_printf(p, "\tnormalized-zpos=%x\n", state->normalized_zpos);
659 drm_printf(p, "\tcolor-encoding=%s\n",
660 drm_get_color_encoding_name(state->color_encoding));
661 drm_printf(p, "\tcolor-range=%s\n",
662 drm_get_color_range_name(state->color_range));
664 if (plane->funcs->atomic_print_state)
665 plane->funcs->atomic_print_state(p, state);
669 * DOC: handling driver private state
671 * Very often the DRM objects exposed to userspace in the atomic modeset api
672 * (&drm_connector, &drm_crtc and &drm_plane) do not map neatly to the
673 * underlying hardware. Especially for any kind of shared resources (e.g. shared
674 * clocks, scaler units, bandwidth and fifo limits shared among a group of
675 * planes or CRTCs, and so on) it makes sense to model these as independent
676 * objects. Drivers then need to do similar state tracking and commit ordering for
677 * such private (since not exposed to userpace) objects as the atomic core and
678 * helpers already provide for connectors, planes and CRTCs.
680 * To make this easier on drivers the atomic core provides some support to track
681 * driver private state objects using struct &drm_private_obj, with the
682 * associated state struct &drm_private_state.
684 * Similar to userspace-exposed objects, private state structures can be
685 * acquired by calling drm_atomic_get_private_obj_state(). Since this function
686 * does not take care of locking, drivers should wrap it for each type of
687 * private state object they have with the required call to drm_modeset_lock()
688 * for the corresponding &drm_modeset_lock.
690 * All private state structures contained in a &drm_atomic_state update can be
691 * iterated using for_each_oldnew_private_obj_in_state(),
692 * for_each_new_private_obj_in_state() and for_each_old_private_obj_in_state().
693 * Drivers are recommended to wrap these for each type of driver private state
694 * object they have, filtering on &drm_private_obj.funcs using for_each_if(), at
695 * least if they want to iterate over all objects of a given type.
697 * An earlier way to handle driver private state was by subclassing struct
698 * &drm_atomic_state. But since that encourages non-standard ways to implement
699 * the check/commit split atomic requires (by using e.g. "check and rollback or
700 * commit instead" of "duplicate state, check, then either commit or release
701 * duplicated state) it is deprecated in favour of using &drm_private_state.
705 * drm_atomic_private_obj_init - initialize private object
706 * @dev: DRM device this object will be attached to
707 * @obj: private object
708 * @state: initial private object state
709 * @funcs: pointer to the struct of function pointers that identify the object
712 * Initialize the private object, which can be embedded into any
713 * driver private object that needs its own atomic state.
716 drm_atomic_private_obj_init(struct drm_device *dev,
717 struct drm_private_obj *obj,
718 struct drm_private_state *state,
719 const struct drm_private_state_funcs *funcs)
721 memset(obj, 0, sizeof(*obj));
723 drm_modeset_lock_init(&obj->lock);
727 list_add_tail(&obj->head, &dev->mode_config.privobj_list);
729 EXPORT_SYMBOL(drm_atomic_private_obj_init);
732 * drm_atomic_private_obj_fini - finalize private object
733 * @obj: private object
735 * Finalize the private object.
738 drm_atomic_private_obj_fini(struct drm_private_obj *obj)
740 list_del(&obj->head);
741 obj->funcs->atomic_destroy_state(obj, obj->state);
742 drm_modeset_lock_fini(&obj->lock);
744 EXPORT_SYMBOL(drm_atomic_private_obj_fini);
747 * drm_atomic_get_private_obj_state - get private object state
748 * @state: global atomic state
749 * @obj: private object to get the state for
751 * This function returns the private object state for the given private object,
752 * allocating the state if needed. It will also grab the relevant private
753 * object lock to make sure that the state is consistent.
757 * Either the allocated state or the error code encoded into a pointer.
759 struct drm_private_state *
760 drm_atomic_get_private_obj_state(struct drm_atomic_state *state,
761 struct drm_private_obj *obj)
763 int index, num_objs, i, ret;
765 struct __drm_private_objs_state *arr;
766 struct drm_private_state *obj_state;
768 for (i = 0; i < state->num_private_objs; i++)
769 if (obj == state->private_objs[i].ptr)
770 return state->private_objs[i].state;
772 ret = drm_modeset_lock(&obj->lock, state->acquire_ctx);
776 num_objs = state->num_private_objs + 1;
777 size = sizeof(*state->private_objs) * num_objs;
778 arr = krealloc(state->private_objs, size, GFP_KERNEL);
780 return ERR_PTR(-ENOMEM);
782 state->private_objs = arr;
783 index = state->num_private_objs;
784 memset(&state->private_objs[index], 0, sizeof(*state->private_objs));
786 obj_state = obj->funcs->atomic_duplicate_state(obj);
788 return ERR_PTR(-ENOMEM);
790 state->private_objs[index].state = obj_state;
791 state->private_objs[index].old_state = obj->state;
792 state->private_objs[index].new_state = obj_state;
793 state->private_objs[index].ptr = obj;
794 obj_state->state = state;
796 state->num_private_objs = num_objs;
798 DRM_DEBUG_ATOMIC("Added new private object %p state %p to %p\n",
799 obj, obj_state, state);
803 EXPORT_SYMBOL(drm_atomic_get_private_obj_state);
806 * drm_atomic_get_old_private_obj_state
807 * @state: global atomic state object
808 * @obj: private_obj to grab
810 * This function returns the old private object state for the given private_obj,
811 * or NULL if the private_obj is not part of the global atomic state.
813 struct drm_private_state *
814 drm_atomic_get_old_private_obj_state(struct drm_atomic_state *state,
815 struct drm_private_obj *obj)
819 for (i = 0; i < state->num_private_objs; i++)
820 if (obj == state->private_objs[i].ptr)
821 return state->private_objs[i].old_state;
825 EXPORT_SYMBOL(drm_atomic_get_old_private_obj_state);
828 * drm_atomic_get_new_private_obj_state
829 * @state: global atomic state object
830 * @obj: private_obj to grab
832 * This function returns the new private object state for the given private_obj,
833 * or NULL if the private_obj is not part of the global atomic state.
835 struct drm_private_state *
836 drm_atomic_get_new_private_obj_state(struct drm_atomic_state *state,
837 struct drm_private_obj *obj)
841 for (i = 0; i < state->num_private_objs; i++)
842 if (obj == state->private_objs[i].ptr)
843 return state->private_objs[i].new_state;
847 EXPORT_SYMBOL(drm_atomic_get_new_private_obj_state);
850 * drm_atomic_get_old_connector_for_encoder - Get old connector for an encoder
851 * @state: Atomic state
852 * @encoder: The encoder to fetch the connector state for
854 * This function finds and returns the connector that was connected to @encoder
855 * as specified by the @state.
857 * If there is no connector in @state which previously had @encoder connected to
858 * it, this function will return NULL. While this may seem like an invalid use
859 * case, it is sometimes useful to differentiate commits which had no prior
860 * connectors attached to @encoder vs ones that did (and to inspect their
861 * state). This is especially true in enable hooks because the pipeline has
864 * Returns: The old connector connected to @encoder, or NULL if the encoder is
867 struct drm_connector *
868 drm_atomic_get_old_connector_for_encoder(struct drm_atomic_state *state,
869 struct drm_encoder *encoder)
871 struct drm_connector_state *conn_state;
872 struct drm_connector *connector;
875 for_each_old_connector_in_state(state, connector, conn_state, i) {
876 if (conn_state->best_encoder == encoder)
882 EXPORT_SYMBOL(drm_atomic_get_old_connector_for_encoder);
885 * drm_atomic_get_new_connector_for_encoder - Get new connector for an encoder
886 * @state: Atomic state
887 * @encoder: The encoder to fetch the connector state for
889 * This function finds and returns the connector that will be connected to
890 * @encoder as specified by the @state.
892 * If there is no connector in @state which will have @encoder connected to it,
893 * this function will return NULL. While this may seem like an invalid use case,
894 * it is sometimes useful to differentiate commits which have no connectors
895 * attached to @encoder vs ones that do (and to inspect their state). This is
896 * especially true in disable hooks because the pipeline will change.
898 * Returns: The new connector connected to @encoder, or NULL if the encoder is
901 struct drm_connector *
902 drm_atomic_get_new_connector_for_encoder(struct drm_atomic_state *state,
903 struct drm_encoder *encoder)
905 struct drm_connector_state *conn_state;
906 struct drm_connector *connector;
909 for_each_new_connector_in_state(state, connector, conn_state, i) {
910 if (conn_state->best_encoder == encoder)
916 EXPORT_SYMBOL(drm_atomic_get_new_connector_for_encoder);
919 * drm_atomic_get_connector_state - get connector state
920 * @state: global atomic state object
921 * @connector: connector to get state object for
923 * This function returns the connector state for the given connector,
924 * allocating it if needed. It will also grab the relevant connector lock to
925 * make sure that the state is consistent.
929 * Either the allocated state or the error code encoded into the pointer. When
930 * the error is EDEADLK then the w/w mutex code has detected a deadlock and the
931 * entire atomic sequence must be restarted. All other errors are fatal.
933 struct drm_connector_state *
934 drm_atomic_get_connector_state(struct drm_atomic_state *state,
935 struct drm_connector *connector)
938 struct drm_mode_config *config = &connector->dev->mode_config;
939 struct drm_connector_state *connector_state;
941 WARN_ON(!state->acquire_ctx);
943 ret = drm_modeset_lock(&config->connection_mutex, state->acquire_ctx);
947 index = drm_connector_index(connector);
949 if (index >= state->num_connector) {
950 struct __drm_connnectors_state *c;
951 int alloc = max(index + 1, config->num_connector);
953 c = krealloc(state->connectors, alloc * sizeof(*state->connectors), GFP_KERNEL);
955 return ERR_PTR(-ENOMEM);
957 state->connectors = c;
958 memset(&state->connectors[state->num_connector], 0,
959 sizeof(*state->connectors) * (alloc - state->num_connector));
961 state->num_connector = alloc;
964 if (state->connectors[index].state)
965 return state->connectors[index].state;
967 connector_state = connector->funcs->atomic_duplicate_state(connector);
968 if (!connector_state)
969 return ERR_PTR(-ENOMEM);
971 drm_connector_get(connector);
972 state->connectors[index].state = connector_state;
973 state->connectors[index].old_state = connector->state;
974 state->connectors[index].new_state = connector_state;
975 state->connectors[index].ptr = connector;
976 connector_state->state = state;
978 DRM_DEBUG_ATOMIC("Added [CONNECTOR:%d:%s] %p state to %p\n",
979 connector->base.id, connector->name,
980 connector_state, state);
982 if (connector_state->crtc) {
983 struct drm_crtc_state *crtc_state;
985 crtc_state = drm_atomic_get_crtc_state(state,
986 connector_state->crtc);
987 if (IS_ERR(crtc_state))
988 return ERR_CAST(crtc_state);
991 return connector_state;
993 EXPORT_SYMBOL(drm_atomic_get_connector_state);
995 static void drm_atomic_connector_print_state(struct drm_printer *p,
996 const struct drm_connector_state *state)
998 struct drm_connector *connector = state->connector;
1000 drm_printf(p, "connector[%u]: %s\n", connector->base.id, connector->name);
1001 drm_printf(p, "\tcrtc=%s\n", state->crtc ? state->crtc->name : "(null)");
1003 if (connector->connector_type == DRM_MODE_CONNECTOR_WRITEBACK)
1004 if (state->writeback_job && state->writeback_job->fb)
1005 drm_printf(p, "\tfb=%d\n", state->writeback_job->fb->base.id);
1007 if (connector->funcs->atomic_print_state)
1008 connector->funcs->atomic_print_state(p, state);
1012 * drm_atomic_add_affected_connectors - add connectors for crtc
1013 * @state: atomic state
1016 * This function walks the current configuration and adds all connectors
1017 * currently using @crtc to the atomic configuration @state. Note that this
1018 * function must acquire the connection mutex. This can potentially cause
1019 * unneeded seralization if the update is just for the planes on one crtc. Hence
1020 * drivers and helpers should only call this when really needed (e.g. when a
1021 * full modeset needs to happen due to some change).
1024 * 0 on success or can fail with -EDEADLK or -ENOMEM. When the error is EDEADLK
1025 * then the w/w mutex code has detected a deadlock and the entire atomic
1026 * sequence must be restarted. All other errors are fatal.
1029 drm_atomic_add_affected_connectors(struct drm_atomic_state *state,
1030 struct drm_crtc *crtc)
1032 struct drm_mode_config *config = &state->dev->mode_config;
1033 struct drm_connector *connector;
1034 struct drm_connector_state *conn_state;
1035 struct drm_connector_list_iter conn_iter;
1036 struct drm_crtc_state *crtc_state;
1039 crtc_state = drm_atomic_get_crtc_state(state, crtc);
1040 if (IS_ERR(crtc_state))
1041 return PTR_ERR(crtc_state);
1043 ret = drm_modeset_lock(&config->connection_mutex, state->acquire_ctx);
1047 DRM_DEBUG_ATOMIC("Adding all current connectors for [CRTC:%d:%s] to %p\n",
1048 crtc->base.id, crtc->name, state);
1051 * Changed connectors are already in @state, so only need to look
1052 * at the connector_mask in crtc_state.
1054 drm_connector_list_iter_begin(state->dev, &conn_iter);
1055 drm_for_each_connector_iter(connector, &conn_iter) {
1056 if (!(crtc_state->connector_mask & drm_connector_mask(connector)))
1059 conn_state = drm_atomic_get_connector_state(state, connector);
1060 if (IS_ERR(conn_state)) {
1061 drm_connector_list_iter_end(&conn_iter);
1062 return PTR_ERR(conn_state);
1065 drm_connector_list_iter_end(&conn_iter);
1069 EXPORT_SYMBOL(drm_atomic_add_affected_connectors);
1072 * drm_atomic_add_affected_planes - add planes for crtc
1073 * @state: atomic state
1076 * This function walks the current configuration and adds all planes
1077 * currently used by @crtc to the atomic configuration @state. This is useful
1078 * when an atomic commit also needs to check all currently enabled plane on
1079 * @crtc, e.g. when changing the mode. It's also useful when re-enabling a CRTC
1080 * to avoid special code to force-enable all planes.
1082 * Since acquiring a plane state will always also acquire the w/w mutex of the
1083 * current CRTC for that plane (if there is any) adding all the plane states for
1084 * a CRTC will not reduce parallism of atomic updates.
1087 * 0 on success or can fail with -EDEADLK or -ENOMEM. When the error is EDEADLK
1088 * then the w/w mutex code has detected a deadlock and the entire atomic
1089 * sequence must be restarted. All other errors are fatal.
1092 drm_atomic_add_affected_planes(struct drm_atomic_state *state,
1093 struct drm_crtc *crtc)
1095 const struct drm_crtc_state *old_crtc_state =
1096 drm_atomic_get_old_crtc_state(state, crtc);
1097 struct drm_plane *plane;
1099 WARN_ON(!drm_atomic_get_new_crtc_state(state, crtc));
1101 DRM_DEBUG_ATOMIC("Adding all current planes for [CRTC:%d:%s] to %p\n",
1102 crtc->base.id, crtc->name, state);
1104 drm_for_each_plane_mask(plane, state->dev, old_crtc_state->plane_mask) {
1105 struct drm_plane_state *plane_state =
1106 drm_atomic_get_plane_state(state, plane);
1108 if (IS_ERR(plane_state))
1109 return PTR_ERR(plane_state);
1113 EXPORT_SYMBOL(drm_atomic_add_affected_planes);
1116 * drm_atomic_check_only - check whether a given config would work
1117 * @state: atomic configuration to check
1119 * Note that this function can return -EDEADLK if the driver needed to acquire
1120 * more locks but encountered a deadlock. The caller must then do the usual w/w
1121 * backoff dance and restart. All other errors are fatal.
1124 * 0 on success, negative error code on failure.
1126 int drm_atomic_check_only(struct drm_atomic_state *state)
1128 struct drm_device *dev = state->dev;
1129 struct drm_mode_config *config = &dev->mode_config;
1130 struct drm_plane *plane;
1131 struct drm_plane_state *old_plane_state;
1132 struct drm_plane_state *new_plane_state;
1133 struct drm_crtc *crtc;
1134 struct drm_crtc_state *old_crtc_state;
1135 struct drm_crtc_state *new_crtc_state;
1136 struct drm_connector *conn;
1137 struct drm_connector_state *conn_state;
1140 DRM_DEBUG_ATOMIC("checking %p\n", state);
1142 for_each_oldnew_plane_in_state(state, plane, old_plane_state, new_plane_state, i) {
1143 ret = drm_atomic_plane_check(old_plane_state, new_plane_state);
1145 DRM_DEBUG_ATOMIC("[PLANE:%d:%s] atomic core check failed\n",
1146 plane->base.id, plane->name);
1151 for_each_oldnew_crtc_in_state(state, crtc, old_crtc_state, new_crtc_state, i) {
1152 ret = drm_atomic_crtc_check(old_crtc_state, new_crtc_state);
1154 DRM_DEBUG_ATOMIC("[CRTC:%d:%s] atomic core check failed\n",
1155 crtc->base.id, crtc->name);
1160 for_each_new_connector_in_state(state, conn, conn_state, i) {
1161 ret = drm_atomic_connector_check(conn, conn_state);
1163 DRM_DEBUG_ATOMIC("[CONNECTOR:%d:%s] atomic core check failed\n",
1164 conn->base.id, conn->name);
1169 if (config->funcs->atomic_check) {
1170 ret = config->funcs->atomic_check(state->dev, state);
1173 DRM_DEBUG_ATOMIC("atomic driver check for %p failed: %d\n",
1179 if (!state->allow_modeset) {
1180 for_each_new_crtc_in_state(state, crtc, new_crtc_state, i) {
1181 if (drm_atomic_crtc_needs_modeset(new_crtc_state)) {
1182 DRM_DEBUG_ATOMIC("[CRTC:%d:%s] requires full modeset\n",
1183 crtc->base.id, crtc->name);
1191 EXPORT_SYMBOL(drm_atomic_check_only);
1194 * drm_atomic_commit - commit configuration atomically
1195 * @state: atomic configuration to check
1197 * Note that this function can return -EDEADLK if the driver needed to acquire
1198 * more locks but encountered a deadlock. The caller must then do the usual w/w
1199 * backoff dance and restart. All other errors are fatal.
1201 * This function will take its own reference on @state.
1202 * Callers should always release their reference with drm_atomic_state_put().
1205 * 0 on success, negative error code on failure.
1207 int drm_atomic_commit(struct drm_atomic_state *state)
1209 struct drm_mode_config *config = &state->dev->mode_config;
1212 ret = drm_atomic_check_only(state);
1216 DRM_DEBUG_ATOMIC("committing %p\n", state);
1218 return config->funcs->atomic_commit(state->dev, state, false);
1220 EXPORT_SYMBOL(drm_atomic_commit);
1223 * drm_atomic_nonblocking_commit - atomic nonblocking commit
1224 * @state: atomic configuration to check
1226 * Note that this function can return -EDEADLK if the driver needed to acquire
1227 * more locks but encountered a deadlock. The caller must then do the usual w/w
1228 * backoff dance and restart. All other errors are fatal.
1230 * This function will take its own reference on @state.
1231 * Callers should always release their reference with drm_atomic_state_put().
1234 * 0 on success, negative error code on failure.
1236 int drm_atomic_nonblocking_commit(struct drm_atomic_state *state)
1238 struct drm_mode_config *config = &state->dev->mode_config;
1241 ret = drm_atomic_check_only(state);
1245 DRM_DEBUG_ATOMIC("committing %p nonblocking\n", state);
1247 return config->funcs->atomic_commit(state->dev, state, true);
1249 EXPORT_SYMBOL(drm_atomic_nonblocking_commit);
1251 /* just used from drm-client and atomic-helper: */
1252 int __drm_atomic_helper_disable_plane(struct drm_plane *plane,
1253 struct drm_plane_state *plane_state)
1257 ret = drm_atomic_set_crtc_for_plane(plane_state, NULL);
1261 drm_atomic_set_fb_for_plane(plane_state, NULL);
1262 plane_state->crtc_x = 0;
1263 plane_state->crtc_y = 0;
1264 plane_state->crtc_w = 0;
1265 plane_state->crtc_h = 0;
1266 plane_state->src_x = 0;
1267 plane_state->src_y = 0;
1268 plane_state->src_w = 0;
1269 plane_state->src_h = 0;
1273 EXPORT_SYMBOL(__drm_atomic_helper_disable_plane);
1275 static int update_output_state(struct drm_atomic_state *state,
1276 struct drm_mode_set *set)
1278 struct drm_device *dev = set->crtc->dev;
1279 struct drm_crtc *crtc;
1280 struct drm_crtc_state *new_crtc_state;
1281 struct drm_connector *connector;
1282 struct drm_connector_state *new_conn_state;
1285 ret = drm_modeset_lock(&dev->mode_config.connection_mutex,
1286 state->acquire_ctx);
1290 /* First disable all connectors on the target crtc. */
1291 ret = drm_atomic_add_affected_connectors(state, set->crtc);
1295 for_each_new_connector_in_state(state, connector, new_conn_state, i) {
1296 if (new_conn_state->crtc == set->crtc) {
1297 ret = drm_atomic_set_crtc_for_connector(new_conn_state,
1302 /* Make sure legacy setCrtc always re-trains */
1303 new_conn_state->link_status = DRM_LINK_STATUS_GOOD;
1307 /* Then set all connectors from set->connectors on the target crtc */
1308 for (i = 0; i < set->num_connectors; i++) {
1309 new_conn_state = drm_atomic_get_connector_state(state,
1310 set->connectors[i]);
1311 if (IS_ERR(new_conn_state))
1312 return PTR_ERR(new_conn_state);
1314 ret = drm_atomic_set_crtc_for_connector(new_conn_state,
1320 for_each_new_crtc_in_state(state, crtc, new_crtc_state, i) {
1322 * Don't update ->enable for the CRTC in the set_config request,
1323 * since a mismatch would indicate a bug in the upper layers.
1324 * The actual modeset code later on will catch any
1325 * inconsistencies here.
1327 if (crtc == set->crtc)
1330 if (!new_crtc_state->connector_mask) {
1331 ret = drm_atomic_set_mode_prop_for_crtc(new_crtc_state,
1336 new_crtc_state->active = false;
1343 /* just used from drm-client and atomic-helper: */
1344 int __drm_atomic_helper_set_config(struct drm_mode_set *set,
1345 struct drm_atomic_state *state)
1347 struct drm_crtc_state *crtc_state;
1348 struct drm_plane_state *primary_state;
1349 struct drm_crtc *crtc = set->crtc;
1350 int hdisplay, vdisplay;
1353 crtc_state = drm_atomic_get_crtc_state(state, crtc);
1354 if (IS_ERR(crtc_state))
1355 return PTR_ERR(crtc_state);
1357 primary_state = drm_atomic_get_plane_state(state, crtc->primary);
1358 if (IS_ERR(primary_state))
1359 return PTR_ERR(primary_state);
1363 WARN_ON(set->num_connectors);
1365 ret = drm_atomic_set_mode_for_crtc(crtc_state, NULL);
1369 crtc_state->active = false;
1371 ret = drm_atomic_set_crtc_for_plane(primary_state, NULL);
1375 drm_atomic_set_fb_for_plane(primary_state, NULL);
1381 WARN_ON(!set->num_connectors);
1383 ret = drm_atomic_set_mode_for_crtc(crtc_state, set->mode);
1387 crtc_state->active = true;
1389 ret = drm_atomic_set_crtc_for_plane(primary_state, crtc);
1393 drm_mode_get_hv_timing(set->mode, &hdisplay, &vdisplay);
1395 drm_atomic_set_fb_for_plane(primary_state, set->fb);
1396 primary_state->crtc_x = 0;
1397 primary_state->crtc_y = 0;
1398 primary_state->crtc_w = hdisplay;
1399 primary_state->crtc_h = vdisplay;
1400 primary_state->src_x = set->x << 16;
1401 primary_state->src_y = set->y << 16;
1402 if (drm_rotation_90_or_270(primary_state->rotation)) {
1403 primary_state->src_w = vdisplay << 16;
1404 primary_state->src_h = hdisplay << 16;
1406 primary_state->src_w = hdisplay << 16;
1407 primary_state->src_h = vdisplay << 16;
1411 ret = update_output_state(state, set);
1417 EXPORT_SYMBOL(__drm_atomic_helper_set_config);
1419 void drm_atomic_print_state(const struct drm_atomic_state *state)
1421 struct drm_printer p = drm_info_printer(state->dev->dev);
1422 struct drm_plane *plane;
1423 struct drm_plane_state *plane_state;
1424 struct drm_crtc *crtc;
1425 struct drm_crtc_state *crtc_state;
1426 struct drm_connector *connector;
1427 struct drm_connector_state *connector_state;
1430 DRM_DEBUG_ATOMIC("checking %p\n", state);
1432 for_each_new_plane_in_state(state, plane, plane_state, i)
1433 drm_atomic_plane_print_state(&p, plane_state);
1435 for_each_new_crtc_in_state(state, crtc, crtc_state, i)
1436 drm_atomic_crtc_print_state(&p, crtc_state);
1438 for_each_new_connector_in_state(state, connector, connector_state, i)
1439 drm_atomic_connector_print_state(&p, connector_state);
1442 static void __drm_state_dump(struct drm_device *dev, struct drm_printer *p,
1445 struct drm_mode_config *config = &dev->mode_config;
1446 struct drm_plane *plane;
1447 struct drm_crtc *crtc;
1448 struct drm_connector *connector;
1449 struct drm_connector_list_iter conn_iter;
1451 if (!drm_drv_uses_atomic_modeset(dev))
1454 list_for_each_entry(plane, &config->plane_list, head) {
1456 drm_modeset_lock(&plane->mutex, NULL);
1457 drm_atomic_plane_print_state(p, plane->state);
1459 drm_modeset_unlock(&plane->mutex);
1462 list_for_each_entry(crtc, &config->crtc_list, head) {
1464 drm_modeset_lock(&crtc->mutex, NULL);
1465 drm_atomic_crtc_print_state(p, crtc->state);
1467 drm_modeset_unlock(&crtc->mutex);
1470 drm_connector_list_iter_begin(dev, &conn_iter);
1472 drm_modeset_lock(&dev->mode_config.connection_mutex, NULL);
1473 drm_for_each_connector_iter(connector, &conn_iter)
1474 drm_atomic_connector_print_state(p, connector->state);
1476 drm_modeset_unlock(&dev->mode_config.connection_mutex);
1477 drm_connector_list_iter_end(&conn_iter);
1481 * drm_state_dump - dump entire device atomic state
1482 * @dev: the drm device
1483 * @p: where to print the state to
1485 * Just for debugging. Drivers might want an option to dump state
1486 * to dmesg in case of error irq's. (Hint, you probably want to
1489 * The caller must drm_modeset_lock_all(), or if this is called
1490 * from error irq handler, it should not be enabled by default.
1491 * (Ie. if you are debugging errors you might not care that this
1492 * is racey. But calling this without all modeset locks held is
1493 * not inherently safe.)
1495 void drm_state_dump(struct drm_device *dev, struct drm_printer *p)
1497 __drm_state_dump(dev, p, false);
1499 EXPORT_SYMBOL(drm_state_dump);
1501 #ifdef CONFIG_DEBUG_FS
1502 static int drm_state_info(struct seq_file *m, void *data)
1504 struct drm_info_node *node = (struct drm_info_node *) m->private;
1505 struct drm_device *dev = node->minor->dev;
1506 struct drm_printer p = drm_seq_file_printer(m);
1508 __drm_state_dump(dev, &p, true);
1513 /* any use in debugfs files to dump individual planes/crtc/etc? */
1514 static const struct drm_info_list drm_atomic_debugfs_list[] = {
1515 {"state", drm_state_info, 0},
1518 int drm_atomic_debugfs_init(struct drm_minor *minor)
1520 return drm_debugfs_create_files(drm_atomic_debugfs_list,
1521 ARRAY_SIZE(drm_atomic_debugfs_list),
1522 minor->debugfs_root, minor);