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>
31 #include <drm/drm_crtc.h>
34 * struct drm_crtc_commit - track modeset commits on a CRTC
36 * This structure is used to track pending modeset changes and atomic commit on
37 * a per-CRTC basis. Since updating the list should never block this structure
38 * is reference counted to allow waiters to safely wait on an event to complete,
39 * without holding any locks.
41 * It has 3 different events in total to allow a fine-grained synchronization
42 * between outstanding updates::
44 * atomic commit thread hardware
46 * write new state into hardware ----> ...
48 * switch to new state on next
51 * wait for buffers to show up ...
53 * ... send completion irq
54 * irq handler signals flip_done
59 * wait for flip_done <----
60 * clean up atomic state
62 * The important bit to know is that cleanup_done is the terminal event, but the
63 * ordering between flip_done and hw_done is entirely up to the specific driver
64 * and modeset state change.
66 * For an implementation of how to use this look at
67 * drm_atomic_helper_setup_commit() from the atomic helper library.
69 struct drm_crtc_commit {
73 * DRM CRTC for this commit.
75 struct drm_crtc *crtc;
80 * Reference count for this structure. Needed to allow blocking on
81 * completions without the risk of the completion disappearing
89 * Will be signaled when the hardware has flipped to the new set of
90 * buffers. Signals at the same time as when the drm event for this
91 * commit is sent to userspace, or when an out-fence is singalled. Note
92 * that for most hardware, in most cases this happens after @hw_done is
95 struct completion flip_done;
100 * Will be signalled when all hw register changes for this commit have
101 * been written out. Especially when disabling a pipe this can be much
102 * later than than @flip_done, since that can signal already when the
103 * screen goes black, whereas to fully shut down a pipe more register
106 * Note that this does not need to include separately reference-counted
107 * resources like backing storage buffer pinning, or runtime pm
110 struct completion hw_done;
115 * Will be signalled after old buffers have been cleaned up by calling
116 * drm_atomic_helper_cleanup_planes(). Since this can only happen after
117 * a vblank wait completed it might be a bit later. This completion is
118 * useful to throttle updates and avoid hardware updates getting ahead
119 * of the buffer cleanup too much.
121 struct completion cleanup_done;
126 * Entry on the per-CRTC &drm_crtc.commit_list. Protected by
127 * $drm_crtc.commit_lock.
129 struct list_head commit_entry;
134 * &drm_pending_vblank_event pointer to clean up private events.
136 struct drm_pending_vblank_event *event;
141 * A flag that's set after drm_atomic_helper_setup_commit takes a second
142 * reference for the completion of $drm_crtc_state.event. It's used by
143 * the free code to remove the second reference if commit fails.
145 bool abort_completion;
148 struct __drm_planes_state {
149 struct drm_plane *ptr;
150 struct drm_plane_state *state, *old_state, *new_state;
153 struct __drm_crtcs_state {
154 struct drm_crtc *ptr;
155 struct drm_crtc_state *state, *old_state, *new_state;
156 s32 __user *out_fence_ptr;
157 unsigned last_vblank_count;
160 struct __drm_connnectors_state {
161 struct drm_connector *ptr;
162 struct drm_connector_state *state, *old_state, *new_state;
165 struct drm_private_obj;
166 struct drm_private_state;
169 * struct drm_private_state_funcs - atomic state functions for private objects
171 * These hooks are used by atomic helpers to create, swap and destroy states of
172 * private objects. The structure itself is used as a vtable to identify the
173 * associated private object type. Each private object type that needs to be
174 * added to the atomic states is expected to have an implementation of these
175 * hooks and pass a pointer to it's drm_private_state_funcs struct to
176 * drm_atomic_get_private_obj_state().
178 struct drm_private_state_funcs {
180 * @atomic_duplicate_state:
182 * Duplicate the current state of the private object and return it. It
183 * is an error to call this before obj->state has been initialized.
187 * Duplicated atomic state or NULL when obj->state is not
188 * initialized or allocation failed.
190 struct drm_private_state *(*atomic_duplicate_state)(struct drm_private_obj *obj);
193 * @atomic_destroy_state:
195 * Frees the private object state created with @atomic_duplicate_state.
197 void (*atomic_destroy_state)(struct drm_private_obj *obj,
198 struct drm_private_state *state);
201 struct drm_private_obj {
202 struct drm_private_state *state;
204 const struct drm_private_state_funcs *funcs;
207 struct drm_private_state {
208 struct drm_atomic_state *state;
211 struct __drm_private_objs_state {
212 struct drm_private_obj *ptr;
213 struct drm_private_state *state, *old_state, *new_state;
217 * struct drm_atomic_state - the global state object for atomic updates
218 * @ref: count of all references to this state (will not be freed until zero)
219 * @dev: parent DRM device
220 * @allow_modeset: allow full modeset
221 * @legacy_cursor_update: hint to enforce legacy cursor IOCTL semantics
222 * @async_update: hint for asynchronous plane update
223 * @planes: pointer to array of structures with per-plane data
224 * @crtcs: pointer to array of CRTC pointers
225 * @num_connector: size of the @connectors and @connector_states arrays
226 * @connectors: pointer to array of structures with per-connector data
227 * @num_private_objs: size of the @private_objs array
228 * @private_objs: pointer to array of private object pointers
229 * @acquire_ctx: acquire context for this atomic modeset state update
231 struct drm_atomic_state {
234 struct drm_device *dev;
235 bool allow_modeset : 1;
236 bool legacy_cursor_update : 1;
237 bool async_update : 1;
238 struct __drm_planes_state *planes;
239 struct __drm_crtcs_state *crtcs;
241 struct __drm_connnectors_state *connectors;
242 int num_private_objs;
243 struct __drm_private_objs_state *private_objs;
245 struct drm_modeset_acquire_ctx *acquire_ctx;
250 * Used for signaling unbound planes/connectors.
251 * When a connector or plane is not bound to any CRTC, it's still important
252 * to preserve linearity to prevent the atomic states from being freed to early.
254 * This commit (if set) is not bound to any crtc, but will be completed when
255 * drm_atomic_helper_commit_hw_done() is called.
257 struct drm_crtc_commit *fake_commit;
262 * Work item which can be used by the driver or helpers to execute the
263 * commit without blocking.
265 struct work_struct commit_work;
268 void __drm_crtc_commit_free(struct kref *kref);
271 * drm_crtc_commit_get - acquire a reference to the CRTC commit
272 * @commit: CRTC commit
274 * Increases the reference of @commit.
277 * The pointer to @commit, with reference increased.
279 static inline struct drm_crtc_commit *drm_crtc_commit_get(struct drm_crtc_commit *commit)
281 kref_get(&commit->ref);
286 * drm_crtc_commit_put - release a reference to the CRTC commmit
287 * @commit: CRTC commit
289 * This releases a reference to @commit which is freed after removing the
290 * final reference. No locking required and callable from any context.
292 static inline void drm_crtc_commit_put(struct drm_crtc_commit *commit)
294 kref_put(&commit->ref, __drm_crtc_commit_free);
297 struct drm_atomic_state * __must_check
298 drm_atomic_state_alloc(struct drm_device *dev);
299 void drm_atomic_state_clear(struct drm_atomic_state *state);
302 * drm_atomic_state_get - acquire a reference to the atomic state
303 * @state: The atomic state
305 * Returns a new reference to the @state
307 static inline struct drm_atomic_state *
308 drm_atomic_state_get(struct drm_atomic_state *state)
310 kref_get(&state->ref);
314 void __drm_atomic_state_free(struct kref *ref);
317 * drm_atomic_state_put - release a reference to the atomic state
318 * @state: The atomic state
320 * This releases a reference to @state which is freed after removing the
321 * final reference. No locking required and callable from any context.
323 static inline void drm_atomic_state_put(struct drm_atomic_state *state)
325 kref_put(&state->ref, __drm_atomic_state_free);
329 drm_atomic_state_init(struct drm_device *dev, struct drm_atomic_state *state);
330 void drm_atomic_state_default_clear(struct drm_atomic_state *state);
331 void drm_atomic_state_default_release(struct drm_atomic_state *state);
333 struct drm_crtc_state * __must_check
334 drm_atomic_get_crtc_state(struct drm_atomic_state *state,
335 struct drm_crtc *crtc);
336 int drm_atomic_crtc_set_property(struct drm_crtc *crtc,
337 struct drm_crtc_state *state, struct drm_property *property,
339 struct drm_plane_state * __must_check
340 drm_atomic_get_plane_state(struct drm_atomic_state *state,
341 struct drm_plane *plane);
342 struct drm_connector_state * __must_check
343 drm_atomic_get_connector_state(struct drm_atomic_state *state,
344 struct drm_connector *connector);
346 void drm_atomic_private_obj_init(struct drm_private_obj *obj,
347 struct drm_private_state *state,
348 const struct drm_private_state_funcs *funcs);
349 void drm_atomic_private_obj_fini(struct drm_private_obj *obj);
351 struct drm_private_state * __must_check
352 drm_atomic_get_private_obj_state(struct drm_atomic_state *state,
353 struct drm_private_obj *obj);
356 * drm_atomic_get_existing_crtc_state - get crtc state, if it exists
357 * @state: global atomic state object
358 * @crtc: crtc to grab
360 * This function returns the crtc state for the given crtc, or NULL
361 * if the crtc is not part of the global atomic state.
363 * This function is deprecated, @drm_atomic_get_old_crtc_state or
364 * @drm_atomic_get_new_crtc_state should be used instead.
366 static inline struct drm_crtc_state *
367 drm_atomic_get_existing_crtc_state(struct drm_atomic_state *state,
368 struct drm_crtc *crtc)
370 return state->crtcs[drm_crtc_index(crtc)].state;
374 * drm_atomic_get_old_crtc_state - get old crtc state, if it exists
375 * @state: global atomic state object
376 * @crtc: crtc to grab
378 * This function returns the old crtc state for the given crtc, or
379 * NULL if the crtc is not part of the global atomic state.
381 static inline struct drm_crtc_state *
382 drm_atomic_get_old_crtc_state(struct drm_atomic_state *state,
383 struct drm_crtc *crtc)
385 return state->crtcs[drm_crtc_index(crtc)].old_state;
388 * drm_atomic_get_new_crtc_state - get new crtc state, if it exists
389 * @state: global atomic state object
390 * @crtc: crtc to grab
392 * This function returns the new crtc state for the given crtc, or
393 * NULL if the crtc is not part of the global atomic state.
395 static inline struct drm_crtc_state *
396 drm_atomic_get_new_crtc_state(struct drm_atomic_state *state,
397 struct drm_crtc *crtc)
399 return state->crtcs[drm_crtc_index(crtc)].new_state;
403 * drm_atomic_get_existing_plane_state - get plane state, if it exists
404 * @state: global atomic state object
405 * @plane: plane to grab
407 * This function returns the plane state for the given plane, or NULL
408 * if the plane is not part of the global atomic state.
410 * This function is deprecated, @drm_atomic_get_old_plane_state or
411 * @drm_atomic_get_new_plane_state should be used instead.
413 static inline struct drm_plane_state *
414 drm_atomic_get_existing_plane_state(struct drm_atomic_state *state,
415 struct drm_plane *plane)
417 return state->planes[drm_plane_index(plane)].state;
421 * drm_atomic_get_old_plane_state - get plane state, if it exists
422 * @state: global atomic state object
423 * @plane: plane to grab
425 * This function returns the old plane state for the given plane, or
426 * NULL if the plane is not part of the global atomic state.
428 static inline struct drm_plane_state *
429 drm_atomic_get_old_plane_state(struct drm_atomic_state *state,
430 struct drm_plane *plane)
432 return state->planes[drm_plane_index(plane)].old_state;
436 * drm_atomic_get_new_plane_state - get plane state, if it exists
437 * @state: global atomic state object
438 * @plane: plane to grab
440 * This function returns the new plane state for the given plane, or
441 * NULL if the plane is not part of the global atomic state.
443 static inline struct drm_plane_state *
444 drm_atomic_get_new_plane_state(struct drm_atomic_state *state,
445 struct drm_plane *plane)
447 return state->planes[drm_plane_index(plane)].new_state;
451 * drm_atomic_get_existing_connector_state - get connector state, if it exists
452 * @state: global atomic state object
453 * @connector: connector to grab
455 * This function returns the connector state for the given connector,
456 * or NULL if the connector is not part of the global atomic state.
458 * This function is deprecated, @drm_atomic_get_old_connector_state or
459 * @drm_atomic_get_new_connector_state should be used instead.
461 static inline struct drm_connector_state *
462 drm_atomic_get_existing_connector_state(struct drm_atomic_state *state,
463 struct drm_connector *connector)
465 int index = drm_connector_index(connector);
467 if (index >= state->num_connector)
470 return state->connectors[index].state;
474 * drm_atomic_get_old_connector_state - get connector state, if it exists
475 * @state: global atomic state object
476 * @connector: connector to grab
478 * This function returns the old connector state for the given connector,
479 * or NULL if the connector is not part of the global atomic state.
481 static inline struct drm_connector_state *
482 drm_atomic_get_old_connector_state(struct drm_atomic_state *state,
483 struct drm_connector *connector)
485 int index = drm_connector_index(connector);
487 if (index >= state->num_connector)
490 return state->connectors[index].old_state;
494 * drm_atomic_get_new_connector_state - get connector state, if it exists
495 * @state: global atomic state object
496 * @connector: connector to grab
498 * This function returns the new connector state for the given connector,
499 * or NULL if the connector is not part of the global atomic state.
501 static inline struct drm_connector_state *
502 drm_atomic_get_new_connector_state(struct drm_atomic_state *state,
503 struct drm_connector *connector)
505 int index = drm_connector_index(connector);
507 if (index >= state->num_connector)
510 return state->connectors[index].new_state;
514 * __drm_atomic_get_current_plane_state - get current plane state
515 * @state: global atomic state object
516 * @plane: plane to grab
518 * This function returns the plane state for the given plane, either from
519 * @state, or if the plane isn't part of the atomic state update, from @plane.
520 * This is useful in atomic check callbacks, when drivers need to peek at, but
521 * not change, state of other planes, since it avoids threading an error code
522 * back up the call chain.
526 * Note that this function is in general unsafe since it doesn't check for the
527 * required locking for access state structures. Drivers must ensure that it is
528 * safe to access the returned state structure through other means. One common
529 * example is when planes are fixed to a single CRTC, and the driver knows that
530 * the CRTC lock is held already. In that case holding the CRTC lock gives a
531 * read-lock on all planes connected to that CRTC. But if planes can be
532 * reassigned things get more tricky. In that case it's better to use
533 * drm_atomic_get_plane_state and wire up full error handling.
537 * Read-only pointer to the current plane state.
539 static inline const struct drm_plane_state *
540 __drm_atomic_get_current_plane_state(struct drm_atomic_state *state,
541 struct drm_plane *plane)
543 if (state->planes[drm_plane_index(plane)].state)
544 return state->planes[drm_plane_index(plane)].state;
550 drm_atomic_set_mode_for_crtc(struct drm_crtc_state *state,
551 const struct drm_display_mode *mode);
553 drm_atomic_set_mode_prop_for_crtc(struct drm_crtc_state *state,
554 struct drm_property_blob *blob);
556 drm_atomic_set_crtc_for_plane(struct drm_plane_state *plane_state,
557 struct drm_crtc *crtc);
558 void drm_atomic_set_fb_for_plane(struct drm_plane_state *plane_state,
559 struct drm_framebuffer *fb);
560 void drm_atomic_set_fence_for_plane(struct drm_plane_state *plane_state,
561 struct dma_fence *fence);
563 drm_atomic_set_crtc_for_connector(struct drm_connector_state *conn_state,
564 struct drm_crtc *crtc);
566 drm_atomic_add_affected_connectors(struct drm_atomic_state *state,
567 struct drm_crtc *crtc);
569 drm_atomic_add_affected_planes(struct drm_atomic_state *state,
570 struct drm_crtc *crtc);
573 drm_atomic_clean_old_fb(struct drm_device *dev, unsigned plane_mask, int ret);
575 int __must_check drm_atomic_check_only(struct drm_atomic_state *state);
576 int __must_check drm_atomic_commit(struct drm_atomic_state *state);
577 int __must_check drm_atomic_nonblocking_commit(struct drm_atomic_state *state);
579 void drm_state_dump(struct drm_device *dev, struct drm_printer *p);
582 * for_each_oldnew_connector_in_state - iterate over all connectors in an atomic update
583 * @__state: &struct drm_atomic_state pointer
584 * @connector: &struct drm_connector iteration cursor
585 * @old_connector_state: &struct drm_connector_state iteration cursor for the
587 * @new_connector_state: &struct drm_connector_state iteration cursor for the
589 * @__i: int iteration cursor, for macro-internal use
591 * This iterates over all connectors in an atomic update, tracking both old and
592 * new state. This is useful in places where the state delta needs to be
593 * considered, for example in atomic check functions.
595 #define for_each_oldnew_connector_in_state(__state, connector, old_connector_state, new_connector_state, __i) \
597 (__i) < (__state)->num_connector; \
599 for_each_if ((__state)->connectors[__i].ptr && \
600 ((connector) = (__state)->connectors[__i].ptr, \
601 (old_connector_state) = (__state)->connectors[__i].old_state, \
602 (new_connector_state) = (__state)->connectors[__i].new_state, 1))
605 * for_each_old_connector_in_state - iterate over all connectors in an atomic update
606 * @__state: &struct drm_atomic_state pointer
607 * @connector: &struct drm_connector iteration cursor
608 * @old_connector_state: &struct drm_connector_state iteration cursor for the
610 * @__i: int iteration cursor, for macro-internal use
612 * This iterates over all connectors in an atomic update, tracking only the old
613 * state. This is useful in disable functions, where we need the old state the
614 * hardware is still in.
616 #define for_each_old_connector_in_state(__state, connector, old_connector_state, __i) \
618 (__i) < (__state)->num_connector; \
620 for_each_if ((__state)->connectors[__i].ptr && \
621 ((connector) = (__state)->connectors[__i].ptr, \
622 (old_connector_state) = (__state)->connectors[__i].old_state, 1))
625 * for_each_new_connector_in_state - iterate over all connectors in an atomic update
626 * @__state: &struct drm_atomic_state pointer
627 * @connector: &struct drm_connector iteration cursor
628 * @new_connector_state: &struct drm_connector_state iteration cursor for the
630 * @__i: int iteration cursor, for macro-internal use
632 * This iterates over all connectors in an atomic update, tracking only the new
633 * state. This is useful in enable functions, where we need the new state the
634 * hardware should be in when the atomic commit operation has completed.
636 #define for_each_new_connector_in_state(__state, connector, new_connector_state, __i) \
638 (__i) < (__state)->num_connector; \
640 for_each_if ((__state)->connectors[__i].ptr && \
641 ((connector) = (__state)->connectors[__i].ptr, \
642 (new_connector_state) = (__state)->connectors[__i].new_state, 1))
645 * for_each_oldnew_crtc_in_state - iterate over all CRTCs in an atomic update
646 * @__state: &struct drm_atomic_state pointer
647 * @crtc: &struct drm_crtc iteration cursor
648 * @old_crtc_state: &struct drm_crtc_state iteration cursor for the old state
649 * @new_crtc_state: &struct drm_crtc_state iteration cursor for the new state
650 * @__i: int iteration cursor, for macro-internal use
652 * This iterates over all CRTCs in an atomic update, tracking both old and
653 * new state. This is useful in places where the state delta needs to be
654 * considered, for example in atomic check functions.
656 #define for_each_oldnew_crtc_in_state(__state, crtc, old_crtc_state, new_crtc_state, __i) \
658 (__i) < (__state)->dev->mode_config.num_crtc; \
660 for_each_if ((__state)->crtcs[__i].ptr && \
661 ((crtc) = (__state)->crtcs[__i].ptr, \
662 (old_crtc_state) = (__state)->crtcs[__i].old_state, \
663 (new_crtc_state) = (__state)->crtcs[__i].new_state, 1))
666 * for_each_old_crtc_in_state - iterate over all CRTCs in an atomic update
667 * @__state: &struct drm_atomic_state pointer
668 * @crtc: &struct drm_crtc iteration cursor
669 * @old_crtc_state: &struct drm_crtc_state iteration cursor for the old state
670 * @__i: int iteration cursor, for macro-internal use
672 * This iterates over all CRTCs in an atomic update, tracking only the old
673 * state. This is useful in disable functions, where we need the old state the
674 * hardware is still in.
676 #define for_each_old_crtc_in_state(__state, crtc, old_crtc_state, __i) \
678 (__i) < (__state)->dev->mode_config.num_crtc; \
680 for_each_if ((__state)->crtcs[__i].ptr && \
681 ((crtc) = (__state)->crtcs[__i].ptr, \
682 (old_crtc_state) = (__state)->crtcs[__i].old_state, 1))
685 * for_each_new_crtc_in_state - iterate over all CRTCs in an atomic update
686 * @__state: &struct drm_atomic_state pointer
687 * @crtc: &struct drm_crtc iteration cursor
688 * @new_crtc_state: &struct drm_crtc_state iteration cursor for the new state
689 * @__i: int iteration cursor, for macro-internal use
691 * This iterates over all CRTCs in an atomic update, tracking only the new
692 * state. This is useful in enable functions, where we need the new state the
693 * hardware should be in when the atomic commit operation has completed.
695 #define for_each_new_crtc_in_state(__state, crtc, new_crtc_state, __i) \
697 (__i) < (__state)->dev->mode_config.num_crtc; \
699 for_each_if ((__state)->crtcs[__i].ptr && \
700 ((crtc) = (__state)->crtcs[__i].ptr, \
701 (new_crtc_state) = (__state)->crtcs[__i].new_state, 1))
704 * for_each_oldnew_plane_in_state - iterate over all planes in an atomic update
705 * @__state: &struct drm_atomic_state pointer
706 * @plane: &struct drm_plane iteration cursor
707 * @old_plane_state: &struct drm_plane_state iteration cursor for the old state
708 * @new_plane_state: &struct drm_plane_state iteration cursor for the new state
709 * @__i: int iteration cursor, for macro-internal use
711 * This iterates over all planes in an atomic update, tracking both old and
712 * new state. This is useful in places where the state delta needs to be
713 * considered, for example in atomic check functions.
715 #define for_each_oldnew_plane_in_state(__state, plane, old_plane_state, new_plane_state, __i) \
717 (__i) < (__state)->dev->mode_config.num_total_plane; \
719 for_each_if ((__state)->planes[__i].ptr && \
720 ((plane) = (__state)->planes[__i].ptr, \
721 (old_plane_state) = (__state)->planes[__i].old_state,\
722 (new_plane_state) = (__state)->planes[__i].new_state, 1))
725 * for_each_oldnew_plane_in_state_reverse - iterate over all planes in an atomic
726 * update in reverse order
727 * @__state: &struct drm_atomic_state pointer
728 * @plane: &struct drm_plane iteration cursor
729 * @old_plane_state: &struct drm_plane_state iteration cursor for the old state
730 * @new_plane_state: &struct drm_plane_state iteration cursor for the new state
731 * @__i: int iteration cursor, for macro-internal use
733 * This iterates over all planes in an atomic update in reverse order,
734 * tracking both old and new state. This is useful in places where the
735 * state delta needs to be considered, for example in atomic check functions.
737 #define for_each_oldnew_plane_in_state_reverse(__state, plane, old_plane_state, new_plane_state, __i) \
738 for ((__i) = ((__state)->dev->mode_config.num_total_plane - 1); \
741 for_each_if ((__state)->planes[__i].ptr && \
742 ((plane) = (__state)->planes[__i].ptr, \
743 (old_plane_state) = (__state)->planes[__i].old_state,\
744 (new_plane_state) = (__state)->planes[__i].new_state, 1))
747 * for_each_old_plane_in_state - iterate over all planes in an atomic update
748 * @__state: &struct drm_atomic_state pointer
749 * @plane: &struct drm_plane iteration cursor
750 * @old_plane_state: &struct drm_plane_state iteration cursor for the old state
751 * @__i: int iteration cursor, for macro-internal use
753 * This iterates over all planes in an atomic update, tracking only the old
754 * state. This is useful in disable functions, where we need the old state the
755 * hardware is still in.
757 #define for_each_old_plane_in_state(__state, plane, old_plane_state, __i) \
759 (__i) < (__state)->dev->mode_config.num_total_plane; \
761 for_each_if ((__state)->planes[__i].ptr && \
762 ((plane) = (__state)->planes[__i].ptr, \
763 (old_plane_state) = (__state)->planes[__i].old_state, 1))
765 * for_each_new_plane_in_state - iterate over all planes in an atomic update
766 * @__state: &struct drm_atomic_state pointer
767 * @plane: &struct drm_plane iteration cursor
768 * @new_plane_state: &struct drm_plane_state iteration cursor for the new state
769 * @__i: int iteration cursor, for macro-internal use
771 * This iterates over all planes in an atomic update, tracking only the new
772 * state. This is useful in enable functions, where we need the new state the
773 * hardware should be in when the atomic commit operation has completed.
775 #define for_each_new_plane_in_state(__state, plane, new_plane_state, __i) \
777 (__i) < (__state)->dev->mode_config.num_total_plane; \
779 for_each_if ((__state)->planes[__i].ptr && \
780 ((plane) = (__state)->planes[__i].ptr, \
781 (new_plane_state) = (__state)->planes[__i].new_state, 1))
784 * for_each_oldnew_private_obj_in_state - iterate over all private objects in an atomic update
785 * @__state: &struct drm_atomic_state pointer
786 * @obj: &struct drm_private_obj iteration cursor
787 * @old_obj_state: &struct drm_private_state iteration cursor for the old state
788 * @new_obj_state: &struct drm_private_state iteration cursor for the new state
789 * @__i: int iteration cursor, for macro-internal use
791 * This iterates over all private objects in an atomic update, tracking both
792 * old and new state. This is useful in places where the state delta needs
793 * to be considered, for example in atomic check functions.
795 #define for_each_oldnew_private_obj_in_state(__state, obj, old_obj_state, new_obj_state, __i) \
797 (__i) < (__state)->num_private_objs && \
798 ((obj) = (__state)->private_objs[__i].ptr, \
799 (old_obj_state) = (__state)->private_objs[__i].old_state, \
800 (new_obj_state) = (__state)->private_objs[__i].new_state, 1); \
804 * for_each_old_private_obj_in_state - iterate over all private objects in an atomic update
805 * @__state: &struct drm_atomic_state pointer
806 * @obj: &struct drm_private_obj iteration cursor
807 * @old_obj_state: &struct drm_private_state iteration cursor for the old state
808 * @__i: int iteration cursor, for macro-internal use
810 * This iterates over all private objects in an atomic update, tracking only
811 * the old state. This is useful in disable functions, where we need the old
812 * state the hardware is still in.
814 #define for_each_old_private_obj_in_state(__state, obj, old_obj_state, __i) \
816 (__i) < (__state)->num_private_objs && \
817 ((obj) = (__state)->private_objs[__i].ptr, \
818 (old_obj_state) = (__state)->private_objs[__i].old_state, 1); \
822 * for_each_new_private_obj_in_state - iterate over all private objects in an atomic update
823 * @__state: &struct drm_atomic_state pointer
824 * @obj: &struct drm_private_obj iteration cursor
825 * @new_obj_state: &struct drm_private_state iteration cursor for the new state
826 * @__i: int iteration cursor, for macro-internal use
828 * This iterates over all private objects in an atomic update, tracking only
829 * the new state. This is useful in enable functions, where we need the new state the
830 * hardware should be in when the atomic commit operation has completed.
832 #define for_each_new_private_obj_in_state(__state, obj, new_obj_state, __i) \
834 (__i) < (__state)->num_private_objs && \
835 ((obj) = (__state)->private_objs[__i].ptr, \
836 (new_obj_state) = (__state)->private_objs[__i].new_state, 1); \
840 * drm_atomic_crtc_needs_modeset - compute combined modeset need
841 * @state: &drm_crtc_state for the CRTC
843 * To give drivers flexibility &struct drm_crtc_state has 3 booleans to track
844 * whether the state CRTC changed enough to need a full modeset cycle:
845 * mode_changed, active_changed and connectors_changed. This helper simply
846 * combines these three to compute the overall need for a modeset for @state.
848 * The atomic helper code sets these booleans, but drivers can and should
849 * change them appropriately to accurately represent whether a modeset is
850 * really needed. In general, drivers should avoid full modesets whenever
853 * For example if the CRTC mode has changed, and the hardware is able to enact
854 * the requested mode change without going through a full modeset, the driver
855 * should clear mode_changed in its &drm_mode_config_funcs.atomic_check
859 drm_atomic_crtc_needs_modeset(const struct drm_crtc_state *state)
861 return state->mode_changed || state->active_changed ||
862 state->connectors_changed;
865 #endif /* DRM_ATOMIC_H_ */