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>
32 #include <drm/drm_util.h>
35 * struct drm_crtc_commit - track modeset commits on a CRTC
37 * This structure is used to track pending modeset changes and atomic commit on
38 * a per-CRTC basis. Since updating the list should never block this structure
39 * is reference counted to allow waiters to safely wait on an event to complete,
40 * without holding any locks.
42 * It has 3 different events in total to allow a fine-grained synchronization
43 * between outstanding updates::
45 * atomic commit thread hardware
47 * write new state into hardware ----> ...
49 * switch to new state on next
52 * wait for buffers to show up ...
54 * ... send completion irq
55 * irq handler signals flip_done
60 * wait for flip_done <----
61 * clean up atomic state
63 * The important bit to know is that cleanup_done is the terminal event, but the
64 * ordering between flip_done and hw_done is entirely up to the specific driver
65 * and modeset state change.
67 * For an implementation of how to use this look at
68 * drm_atomic_helper_setup_commit() from the atomic helper library.
70 struct drm_crtc_commit {
74 * DRM CRTC for this commit.
76 struct drm_crtc *crtc;
81 * Reference count for this structure. Needed to allow blocking on
82 * completions without the risk of the completion disappearing
90 * Will be signaled when the hardware has flipped to the new set of
91 * buffers. Signals at the same time as when the drm event for this
92 * commit is sent to userspace, or when an out-fence is singalled. Note
93 * that for most hardware, in most cases this happens after @hw_done is
96 struct completion flip_done;
101 * Will be signalled when all hw register changes for this commit have
102 * been written out. Especially when disabling a pipe this can be much
103 * later than than @flip_done, since that can signal already when the
104 * screen goes black, whereas to fully shut down a pipe more register
107 * Note that this does not need to include separately reference-counted
108 * resources like backing storage buffer pinning, or runtime pm
111 struct completion hw_done;
116 * Will be signalled after old buffers have been cleaned up by calling
117 * drm_atomic_helper_cleanup_planes(). Since this can only happen after
118 * a vblank wait completed it might be a bit later. This completion is
119 * useful to throttle updates and avoid hardware updates getting ahead
120 * of the buffer cleanup too much.
122 struct completion cleanup_done;
127 * Entry on the per-CRTC &drm_crtc.commit_list. Protected by
128 * $drm_crtc.commit_lock.
130 struct list_head commit_entry;
135 * &drm_pending_vblank_event pointer to clean up private events.
137 struct drm_pending_vblank_event *event;
142 * A flag that's set after drm_atomic_helper_setup_commit takes a second
143 * reference for the completion of $drm_crtc_state.event. It's used by
144 * the free code to remove the second reference if commit fails.
146 bool abort_completion;
149 struct __drm_planes_state {
150 struct drm_plane *ptr;
151 struct drm_plane_state *state, *old_state, *new_state;
154 struct __drm_crtcs_state {
155 struct drm_crtc *ptr;
156 struct drm_crtc_state *state, *old_state, *new_state;
161 * A reference to the CRTC commit object that is kept for use by
162 * drm_atomic_helper_wait_for_flip_done() after
163 * drm_atomic_helper_commit_hw_done() is called. This ensures that a
164 * concurrent commit won't free a commit object that is still in use.
166 struct drm_crtc_commit *commit;
168 s32 __user *out_fence_ptr;
169 u64 last_vblank_count;
172 struct __drm_connnectors_state {
173 struct drm_connector *ptr;
174 struct drm_connector_state *state, *old_state, *new_state;
178 * User-provided pointer which the kernel uses to return a sync_file
179 * file descriptor. Used by writeback connectors to signal completion of
182 s32 __user *out_fence_ptr;
185 struct drm_private_obj;
186 struct drm_private_state;
189 * struct drm_private_state_funcs - atomic state functions for private objects
191 * These hooks are used by atomic helpers to create, swap and destroy states of
192 * private objects. The structure itself is used as a vtable to identify the
193 * associated private object type. Each private object type that needs to be
194 * added to the atomic states is expected to have an implementation of these
195 * hooks and pass a pointer to it's drm_private_state_funcs struct to
196 * drm_atomic_get_private_obj_state().
198 struct drm_private_state_funcs {
200 * @atomic_duplicate_state:
202 * Duplicate the current state of the private object and return it. It
203 * is an error to call this before obj->state has been initialized.
207 * Duplicated atomic state or NULL when obj->state is not
208 * initialized or allocation failed.
210 struct drm_private_state *(*atomic_duplicate_state)(struct drm_private_obj *obj);
213 * @atomic_destroy_state:
215 * Frees the private object state created with @atomic_duplicate_state.
217 void (*atomic_destroy_state)(struct drm_private_obj *obj,
218 struct drm_private_state *state);
222 * struct drm_private_obj - base struct for driver private atomic object
224 * A driver private object is initialized by calling
225 * drm_atomic_private_obj_init() and cleaned up by calling
226 * drm_atomic_private_obj_fini().
228 * Currently only tracks the state update functions and the opaque driver
229 * private state itself, but in the future might also track which
230 * &drm_modeset_lock is required to duplicate and update this object's state.
232 struct drm_private_obj {
234 * @state: Current atomic state for this driver private object.
236 struct drm_private_state *state;
241 * Functions to manipulate the state of this driver private object, see
242 * &drm_private_state_funcs.
244 const struct drm_private_state_funcs *funcs;
248 * struct drm_private_state - base struct for driver private object state
249 * @state: backpointer to global drm_atomic_state
251 * Currently only contains a backpointer to the overall atomic update, but in
252 * the future also might hold synchronization information similar to e.g.
255 struct drm_private_state {
256 struct drm_atomic_state *state;
259 struct __drm_private_objs_state {
260 struct drm_private_obj *ptr;
261 struct drm_private_state *state, *old_state, *new_state;
265 * struct drm_atomic_state - the global state object for atomic updates
266 * @ref: count of all references to this state (will not be freed until zero)
267 * @dev: parent DRM device
268 * @allow_modeset: allow full modeset
269 * @legacy_cursor_update: hint to enforce legacy cursor IOCTL semantics
270 * @async_update: hint for asynchronous plane update
271 * @planes: pointer to array of structures with per-plane data
272 * @crtcs: pointer to array of CRTC pointers
273 * @num_connector: size of the @connectors and @connector_states arrays
274 * @connectors: pointer to array of structures with per-connector data
275 * @num_private_objs: size of the @private_objs array
276 * @private_objs: pointer to array of private object pointers
277 * @acquire_ctx: acquire context for this atomic modeset state update
279 * States are added to an atomic update by calling drm_atomic_get_crtc_state(),
280 * drm_atomic_get_plane_state(), drm_atomic_get_connector_state(), or for
281 * private state structures, drm_atomic_get_private_obj_state().
283 struct drm_atomic_state {
286 struct drm_device *dev;
287 bool allow_modeset : 1;
288 bool legacy_cursor_update : 1;
289 bool async_update : 1;
290 struct __drm_planes_state *planes;
291 struct __drm_crtcs_state *crtcs;
293 struct __drm_connnectors_state *connectors;
294 int num_private_objs;
295 struct __drm_private_objs_state *private_objs;
297 struct drm_modeset_acquire_ctx *acquire_ctx;
302 * Used for signaling unbound planes/connectors.
303 * When a connector or plane is not bound to any CRTC, it's still important
304 * to preserve linearity to prevent the atomic states from being freed to early.
306 * This commit (if set) is not bound to any crtc, but will be completed when
307 * drm_atomic_helper_commit_hw_done() is called.
309 struct drm_crtc_commit *fake_commit;
314 * Work item which can be used by the driver or helpers to execute the
315 * commit without blocking.
317 struct work_struct commit_work;
320 void __drm_crtc_commit_free(struct kref *kref);
323 * drm_crtc_commit_get - acquire a reference to the CRTC commit
324 * @commit: CRTC commit
326 * Increases the reference of @commit.
329 * The pointer to @commit, with reference increased.
331 static inline struct drm_crtc_commit *drm_crtc_commit_get(struct drm_crtc_commit *commit)
333 kref_get(&commit->ref);
338 * drm_crtc_commit_put - release a reference to the CRTC commmit
339 * @commit: CRTC commit
341 * This releases a reference to @commit which is freed after removing the
342 * final reference. No locking required and callable from any context.
344 static inline void drm_crtc_commit_put(struct drm_crtc_commit *commit)
346 kref_put(&commit->ref, __drm_crtc_commit_free);
349 struct drm_atomic_state * __must_check
350 drm_atomic_state_alloc(struct drm_device *dev);
351 void drm_atomic_state_clear(struct drm_atomic_state *state);
354 * drm_atomic_state_get - acquire a reference to the atomic state
355 * @state: The atomic state
357 * Returns a new reference to the @state
359 static inline struct drm_atomic_state *
360 drm_atomic_state_get(struct drm_atomic_state *state)
362 kref_get(&state->ref);
366 void __drm_atomic_state_free(struct kref *ref);
369 * drm_atomic_state_put - release a reference to the atomic state
370 * @state: The atomic state
372 * This releases a reference to @state which is freed after removing the
373 * final reference. No locking required and callable from any context.
375 static inline void drm_atomic_state_put(struct drm_atomic_state *state)
377 kref_put(&state->ref, __drm_atomic_state_free);
381 drm_atomic_state_init(struct drm_device *dev, struct drm_atomic_state *state);
382 void drm_atomic_state_default_clear(struct drm_atomic_state *state);
383 void drm_atomic_state_default_release(struct drm_atomic_state *state);
385 struct drm_crtc_state * __must_check
386 drm_atomic_get_crtc_state(struct drm_atomic_state *state,
387 struct drm_crtc *crtc);
388 struct drm_plane_state * __must_check
389 drm_atomic_get_plane_state(struct drm_atomic_state *state,
390 struct drm_plane *plane);
391 struct drm_connector_state * __must_check
392 drm_atomic_get_connector_state(struct drm_atomic_state *state,
393 struct drm_connector *connector);
395 void drm_atomic_private_obj_init(struct drm_private_obj *obj,
396 struct drm_private_state *state,
397 const struct drm_private_state_funcs *funcs);
398 void drm_atomic_private_obj_fini(struct drm_private_obj *obj);
400 struct drm_private_state * __must_check
401 drm_atomic_get_private_obj_state(struct drm_atomic_state *state,
402 struct drm_private_obj *obj);
405 * drm_atomic_get_existing_crtc_state - get crtc state, if it exists
406 * @state: global atomic state object
407 * @crtc: crtc to grab
409 * This function returns the crtc state for the given crtc, or NULL
410 * if the crtc is not part of the global atomic state.
412 * This function is deprecated, @drm_atomic_get_old_crtc_state or
413 * @drm_atomic_get_new_crtc_state should be used instead.
415 static inline struct drm_crtc_state *
416 drm_atomic_get_existing_crtc_state(struct drm_atomic_state *state,
417 struct drm_crtc *crtc)
419 return state->crtcs[drm_crtc_index(crtc)].state;
423 * drm_atomic_get_old_crtc_state - get old crtc state, if it exists
424 * @state: global atomic state object
425 * @crtc: crtc to grab
427 * This function returns the old crtc state for the given crtc, or
428 * NULL if the crtc is not part of the global atomic state.
430 static inline struct drm_crtc_state *
431 drm_atomic_get_old_crtc_state(struct drm_atomic_state *state,
432 struct drm_crtc *crtc)
434 return state->crtcs[drm_crtc_index(crtc)].old_state;
437 * drm_atomic_get_new_crtc_state - get new crtc state, if it exists
438 * @state: global atomic state object
439 * @crtc: crtc to grab
441 * This function returns the new crtc state for the given crtc, or
442 * NULL if the crtc is not part of the global atomic state.
444 static inline struct drm_crtc_state *
445 drm_atomic_get_new_crtc_state(struct drm_atomic_state *state,
446 struct drm_crtc *crtc)
448 return state->crtcs[drm_crtc_index(crtc)].new_state;
452 * drm_atomic_get_existing_plane_state - get plane state, if it exists
453 * @state: global atomic state object
454 * @plane: plane to grab
456 * This function returns the plane state for the given plane, or NULL
457 * if the plane is not part of the global atomic state.
459 * This function is deprecated, @drm_atomic_get_old_plane_state or
460 * @drm_atomic_get_new_plane_state should be used instead.
462 static inline struct drm_plane_state *
463 drm_atomic_get_existing_plane_state(struct drm_atomic_state *state,
464 struct drm_plane *plane)
466 return state->planes[drm_plane_index(plane)].state;
470 * drm_atomic_get_old_plane_state - get plane state, if it exists
471 * @state: global atomic state object
472 * @plane: plane to grab
474 * This function returns the old plane state for the given plane, or
475 * NULL if the plane is not part of the global atomic state.
477 static inline struct drm_plane_state *
478 drm_atomic_get_old_plane_state(struct drm_atomic_state *state,
479 struct drm_plane *plane)
481 return state->planes[drm_plane_index(plane)].old_state;
485 * drm_atomic_get_new_plane_state - get plane state, if it exists
486 * @state: global atomic state object
487 * @plane: plane to grab
489 * This function returns the new plane state for the given plane, or
490 * NULL if the plane is not part of the global atomic state.
492 static inline struct drm_plane_state *
493 drm_atomic_get_new_plane_state(struct drm_atomic_state *state,
494 struct drm_plane *plane)
496 return state->planes[drm_plane_index(plane)].new_state;
500 * drm_atomic_get_existing_connector_state - get connector state, if it exists
501 * @state: global atomic state object
502 * @connector: connector to grab
504 * This function returns the connector state for the given connector,
505 * or NULL if the connector is not part of the global atomic state.
507 * This function is deprecated, @drm_atomic_get_old_connector_state or
508 * @drm_atomic_get_new_connector_state should be used instead.
510 static inline struct drm_connector_state *
511 drm_atomic_get_existing_connector_state(struct drm_atomic_state *state,
512 struct drm_connector *connector)
514 int index = drm_connector_index(connector);
516 if (index >= state->num_connector)
519 return state->connectors[index].state;
523 * drm_atomic_get_old_connector_state - get connector state, if it exists
524 * @state: global atomic state object
525 * @connector: connector to grab
527 * This function returns the old connector state for the given connector,
528 * or NULL if the connector is not part of the global atomic state.
530 static inline struct drm_connector_state *
531 drm_atomic_get_old_connector_state(struct drm_atomic_state *state,
532 struct drm_connector *connector)
534 int index = drm_connector_index(connector);
536 if (index >= state->num_connector)
539 return state->connectors[index].old_state;
543 * drm_atomic_get_new_connector_state - get connector state, if it exists
544 * @state: global atomic state object
545 * @connector: connector to grab
547 * This function returns the new connector state for the given connector,
548 * or NULL if the connector is not part of the global atomic state.
550 static inline struct drm_connector_state *
551 drm_atomic_get_new_connector_state(struct drm_atomic_state *state,
552 struct drm_connector *connector)
554 int index = drm_connector_index(connector);
556 if (index >= state->num_connector)
559 return state->connectors[index].new_state;
563 * __drm_atomic_get_current_plane_state - get current plane state
564 * @state: global atomic state object
565 * @plane: plane to grab
567 * This function returns the plane state for the given plane, either from
568 * @state, or if the plane isn't part of the atomic state update, from @plane.
569 * This is useful in atomic check callbacks, when drivers need to peek at, but
570 * not change, state of other planes, since it avoids threading an error code
571 * back up the call chain.
575 * Note that this function is in general unsafe since it doesn't check for the
576 * required locking for access state structures. Drivers must ensure that it is
577 * safe to access the returned state structure through other means. One common
578 * example is when planes are fixed to a single CRTC, and the driver knows that
579 * the CRTC lock is held already. In that case holding the CRTC lock gives a
580 * read-lock on all planes connected to that CRTC. But if planes can be
581 * reassigned things get more tricky. In that case it's better to use
582 * drm_atomic_get_plane_state and wire up full error handling.
586 * Read-only pointer to the current plane state.
588 static inline const struct drm_plane_state *
589 __drm_atomic_get_current_plane_state(struct drm_atomic_state *state,
590 struct drm_plane *plane)
592 if (state->planes[drm_plane_index(plane)].state)
593 return state->planes[drm_plane_index(plane)].state;
599 drm_atomic_add_affected_connectors(struct drm_atomic_state *state,
600 struct drm_crtc *crtc);
602 drm_atomic_add_affected_planes(struct drm_atomic_state *state,
603 struct drm_crtc *crtc);
605 int __must_check drm_atomic_check_only(struct drm_atomic_state *state);
606 int __must_check drm_atomic_commit(struct drm_atomic_state *state);
607 int __must_check drm_atomic_nonblocking_commit(struct drm_atomic_state *state);
609 void drm_state_dump(struct drm_device *dev, struct drm_printer *p);
612 * for_each_oldnew_connector_in_state - iterate over all connectors in an atomic update
613 * @__state: &struct drm_atomic_state pointer
614 * @connector: &struct drm_connector iteration cursor
615 * @old_connector_state: &struct drm_connector_state iteration cursor for the
617 * @new_connector_state: &struct drm_connector_state iteration cursor for the
619 * @__i: int iteration cursor, for macro-internal use
621 * This iterates over all connectors in an atomic update, tracking both old and
622 * new state. This is useful in places where the state delta needs to be
623 * considered, for example in atomic check functions.
625 #define for_each_oldnew_connector_in_state(__state, connector, old_connector_state, new_connector_state, __i) \
627 (__i) < (__state)->num_connector; \
629 for_each_if ((__state)->connectors[__i].ptr && \
630 ((connector) = (__state)->connectors[__i].ptr, \
631 (old_connector_state) = (__state)->connectors[__i].old_state, \
632 (new_connector_state) = (__state)->connectors[__i].new_state, 1))
635 * for_each_old_connector_in_state - iterate over all connectors in an atomic update
636 * @__state: &struct drm_atomic_state pointer
637 * @connector: &struct drm_connector iteration cursor
638 * @old_connector_state: &struct drm_connector_state iteration cursor for the
640 * @__i: int iteration cursor, for macro-internal use
642 * This iterates over all connectors in an atomic update, tracking only the old
643 * state. This is useful in disable functions, where we need the old state the
644 * hardware is still in.
646 #define for_each_old_connector_in_state(__state, connector, old_connector_state, __i) \
648 (__i) < (__state)->num_connector; \
650 for_each_if ((__state)->connectors[__i].ptr && \
651 ((connector) = (__state)->connectors[__i].ptr, \
652 (old_connector_state) = (__state)->connectors[__i].old_state, 1))
655 * for_each_new_connector_in_state - iterate over all connectors in an atomic update
656 * @__state: &struct drm_atomic_state pointer
657 * @connector: &struct drm_connector iteration cursor
658 * @new_connector_state: &struct drm_connector_state iteration cursor for the
660 * @__i: int iteration cursor, for macro-internal use
662 * This iterates over all connectors in an atomic update, tracking only the new
663 * state. This is useful in enable functions, where we need the new state the
664 * hardware should be in when the atomic commit operation has completed.
666 #define for_each_new_connector_in_state(__state, connector, new_connector_state, __i) \
668 (__i) < (__state)->num_connector; \
670 for_each_if ((__state)->connectors[__i].ptr && \
671 ((connector) = (__state)->connectors[__i].ptr, \
672 (new_connector_state) = (__state)->connectors[__i].new_state, 1))
675 * for_each_oldnew_crtc_in_state - iterate over all CRTCs in an atomic update
676 * @__state: &struct drm_atomic_state pointer
677 * @crtc: &struct drm_crtc iteration cursor
678 * @old_crtc_state: &struct drm_crtc_state iteration cursor for the old state
679 * @new_crtc_state: &struct drm_crtc_state iteration cursor for the new state
680 * @__i: int iteration cursor, for macro-internal use
682 * This iterates over all CRTCs in an atomic update, tracking both old and
683 * new state. This is useful in places where the state delta needs to be
684 * considered, for example in atomic check functions.
686 #define for_each_oldnew_crtc_in_state(__state, crtc, old_crtc_state, new_crtc_state, __i) \
688 (__i) < (__state)->dev->mode_config.num_crtc; \
690 for_each_if ((__state)->crtcs[__i].ptr && \
691 ((crtc) = (__state)->crtcs[__i].ptr, \
692 (old_crtc_state) = (__state)->crtcs[__i].old_state, \
693 (new_crtc_state) = (__state)->crtcs[__i].new_state, 1))
696 * for_each_old_crtc_in_state - iterate over all CRTCs in an atomic update
697 * @__state: &struct drm_atomic_state pointer
698 * @crtc: &struct drm_crtc iteration cursor
699 * @old_crtc_state: &struct drm_crtc_state iteration cursor for the old state
700 * @__i: int iteration cursor, for macro-internal use
702 * This iterates over all CRTCs in an atomic update, tracking only the old
703 * state. This is useful in disable functions, where we need the old state the
704 * hardware is still in.
706 #define for_each_old_crtc_in_state(__state, crtc, old_crtc_state, __i) \
708 (__i) < (__state)->dev->mode_config.num_crtc; \
710 for_each_if ((__state)->crtcs[__i].ptr && \
711 ((crtc) = (__state)->crtcs[__i].ptr, \
712 (old_crtc_state) = (__state)->crtcs[__i].old_state, 1))
715 * for_each_new_crtc_in_state - iterate over all CRTCs in an atomic update
716 * @__state: &struct drm_atomic_state pointer
717 * @crtc: &struct drm_crtc iteration cursor
718 * @new_crtc_state: &struct drm_crtc_state iteration cursor for the new state
719 * @__i: int iteration cursor, for macro-internal use
721 * This iterates over all CRTCs in an atomic update, tracking only the new
722 * state. This is useful in enable functions, where we need the new state the
723 * hardware should be in when the atomic commit operation has completed.
725 #define for_each_new_crtc_in_state(__state, crtc, new_crtc_state, __i) \
727 (__i) < (__state)->dev->mode_config.num_crtc; \
729 for_each_if ((__state)->crtcs[__i].ptr && \
730 ((crtc) = (__state)->crtcs[__i].ptr, \
731 (new_crtc_state) = (__state)->crtcs[__i].new_state, 1))
734 * for_each_oldnew_plane_in_state - iterate over all planes in an atomic update
735 * @__state: &struct drm_atomic_state pointer
736 * @plane: &struct drm_plane iteration cursor
737 * @old_plane_state: &struct drm_plane_state iteration cursor for the old state
738 * @new_plane_state: &struct drm_plane_state iteration cursor for the new state
739 * @__i: int iteration cursor, for macro-internal use
741 * This iterates over all planes in an atomic update, tracking both old and
742 * new state. This is useful in places where the state delta needs to be
743 * considered, for example in atomic check functions.
745 #define for_each_oldnew_plane_in_state(__state, plane, old_plane_state, new_plane_state, __i) \
747 (__i) < (__state)->dev->mode_config.num_total_plane; \
749 for_each_if ((__state)->planes[__i].ptr && \
750 ((plane) = (__state)->planes[__i].ptr, \
751 (old_plane_state) = (__state)->planes[__i].old_state,\
752 (new_plane_state) = (__state)->planes[__i].new_state, 1))
755 * for_each_oldnew_plane_in_state_reverse - iterate over all planes in an atomic
756 * update in reverse order
757 * @__state: &struct drm_atomic_state pointer
758 * @plane: &struct drm_plane iteration cursor
759 * @old_plane_state: &struct drm_plane_state iteration cursor for the old state
760 * @new_plane_state: &struct drm_plane_state iteration cursor for the new state
761 * @__i: int iteration cursor, for macro-internal use
763 * This iterates over all planes in an atomic update in reverse order,
764 * tracking both old and new state. This is useful in places where the
765 * state delta needs to be considered, for example in atomic check functions.
767 #define for_each_oldnew_plane_in_state_reverse(__state, plane, old_plane_state, new_plane_state, __i) \
768 for ((__i) = ((__state)->dev->mode_config.num_total_plane - 1); \
771 for_each_if ((__state)->planes[__i].ptr && \
772 ((plane) = (__state)->planes[__i].ptr, \
773 (old_plane_state) = (__state)->planes[__i].old_state,\
774 (new_plane_state) = (__state)->planes[__i].new_state, 1))
777 * for_each_old_plane_in_state - iterate over all planes in an atomic update
778 * @__state: &struct drm_atomic_state pointer
779 * @plane: &struct drm_plane iteration cursor
780 * @old_plane_state: &struct drm_plane_state iteration cursor for the old state
781 * @__i: int iteration cursor, for macro-internal use
783 * This iterates over all planes in an atomic update, tracking only the old
784 * state. This is useful in disable functions, where we need the old state the
785 * hardware is still in.
787 #define for_each_old_plane_in_state(__state, plane, old_plane_state, __i) \
789 (__i) < (__state)->dev->mode_config.num_total_plane; \
791 for_each_if ((__state)->planes[__i].ptr && \
792 ((plane) = (__state)->planes[__i].ptr, \
793 (old_plane_state) = (__state)->planes[__i].old_state, 1))
795 * for_each_new_plane_in_state - iterate over all planes in an atomic update
796 * @__state: &struct drm_atomic_state pointer
797 * @plane: &struct drm_plane iteration cursor
798 * @new_plane_state: &struct drm_plane_state iteration cursor for the new state
799 * @__i: int iteration cursor, for macro-internal use
801 * This iterates over all planes in an atomic update, tracking only the new
802 * state. This is useful in enable functions, where we need the new state the
803 * hardware should be in when the atomic commit operation has completed.
805 #define for_each_new_plane_in_state(__state, plane, new_plane_state, __i) \
807 (__i) < (__state)->dev->mode_config.num_total_plane; \
809 for_each_if ((__state)->planes[__i].ptr && \
810 ((plane) = (__state)->planes[__i].ptr, \
811 (new_plane_state) = (__state)->planes[__i].new_state, 1))
814 * for_each_oldnew_private_obj_in_state - iterate over all private objects in an atomic update
815 * @__state: &struct drm_atomic_state pointer
816 * @obj: &struct drm_private_obj iteration cursor
817 * @old_obj_state: &struct drm_private_state iteration cursor for the old state
818 * @new_obj_state: &struct drm_private_state iteration cursor for the new state
819 * @__i: int iteration cursor, for macro-internal use
821 * This iterates over all private objects in an atomic update, tracking both
822 * old and new state. This is useful in places where the state delta needs
823 * to be considered, for example in atomic check functions.
825 #define for_each_oldnew_private_obj_in_state(__state, obj, old_obj_state, new_obj_state, __i) \
827 (__i) < (__state)->num_private_objs && \
828 ((obj) = (__state)->private_objs[__i].ptr, \
829 (old_obj_state) = (__state)->private_objs[__i].old_state, \
830 (new_obj_state) = (__state)->private_objs[__i].new_state, 1); \
834 * for_each_old_private_obj_in_state - iterate over all private objects in an atomic update
835 * @__state: &struct drm_atomic_state pointer
836 * @obj: &struct drm_private_obj iteration cursor
837 * @old_obj_state: &struct drm_private_state iteration cursor for the old state
838 * @__i: int iteration cursor, for macro-internal use
840 * This iterates over all private objects in an atomic update, tracking only
841 * the old state. This is useful in disable functions, where we need the old
842 * state the hardware is still in.
844 #define for_each_old_private_obj_in_state(__state, obj, old_obj_state, __i) \
846 (__i) < (__state)->num_private_objs && \
847 ((obj) = (__state)->private_objs[__i].ptr, \
848 (old_obj_state) = (__state)->private_objs[__i].old_state, 1); \
852 * for_each_new_private_obj_in_state - iterate over all private objects in an atomic update
853 * @__state: &struct drm_atomic_state pointer
854 * @obj: &struct drm_private_obj iteration cursor
855 * @new_obj_state: &struct drm_private_state iteration cursor for the new state
856 * @__i: int iteration cursor, for macro-internal use
858 * This iterates over all private objects in an atomic update, tracking only
859 * the new state. This is useful in enable functions, where we need the new state the
860 * hardware should be in when the atomic commit operation has completed.
862 #define for_each_new_private_obj_in_state(__state, obj, new_obj_state, __i) \
864 (__i) < (__state)->num_private_objs && \
865 ((obj) = (__state)->private_objs[__i].ptr, \
866 (new_obj_state) = (__state)->private_objs[__i].new_state, 1); \
870 * drm_atomic_crtc_needs_modeset - compute combined modeset need
871 * @state: &drm_crtc_state for the CRTC
873 * To give drivers flexibility &struct drm_crtc_state has 3 booleans to track
874 * whether the state CRTC changed enough to need a full modeset cycle:
875 * mode_changed, active_changed and connectors_changed. This helper simply
876 * combines these three to compute the overall need for a modeset for @state.
878 * The atomic helper code sets these booleans, but drivers can and should
879 * change them appropriately to accurately represent whether a modeset is
880 * really needed. In general, drivers should avoid full modesets whenever
883 * For example if the CRTC mode has changed, and the hardware is able to enact
884 * the requested mode change without going through a full modeset, the driver
885 * should clear mode_changed in its &drm_mode_config_funcs.atomic_check
889 drm_atomic_crtc_needs_modeset(const struct drm_crtc_state *state)
891 return state->mode_changed || state->active_changed ||
892 state->connectors_changed;
895 #endif /* DRM_ATOMIC_H_ */