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.
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 * See also drm_crtc_commit_wait().
72 struct drm_crtc_commit {
76 * DRM CRTC for this commit.
78 struct drm_crtc *crtc;
83 * Reference count for this structure. Needed to allow blocking on
84 * completions without the risk of the completion disappearing
92 * Will be signaled when the hardware has flipped to the new set of
93 * buffers. Signals at the same time as when the drm event for this
94 * commit is sent to userspace, or when an out-fence is singalled. Note
95 * that for most hardware, in most cases this happens after @hw_done is
98 * Completion of this stage is signalled implicitly by calling
99 * drm_crtc_send_vblank_event() on &drm_crtc_state.event.
101 struct completion flip_done;
106 * Will be signalled when all hw register changes for this commit have
107 * been written out. Especially when disabling a pipe this can be much
108 * later than @flip_done, since that can signal already when the
109 * screen goes black, whereas to fully shut down a pipe more register
112 * Note that this does not need to include separately reference-counted
113 * resources like backing storage buffer pinning, or runtime pm
116 * Drivers should call drm_atomic_helper_commit_hw_done() to signal
117 * completion of this stage.
119 struct completion hw_done;
124 * Will be signalled after old buffers have been cleaned up by calling
125 * drm_atomic_helper_cleanup_planes(). Since this can only happen after
126 * a vblank wait completed it might be a bit later. This completion is
127 * useful to throttle updates and avoid hardware updates getting ahead
128 * of the buffer cleanup too much.
130 * Drivers should call drm_atomic_helper_commit_cleanup_done() to signal
131 * completion of this stage.
133 struct completion cleanup_done;
138 * Entry on the per-CRTC &drm_crtc.commit_list. Protected by
139 * $drm_crtc.commit_lock.
141 struct list_head commit_entry;
146 * &drm_pending_vblank_event pointer to clean up private events.
148 struct drm_pending_vblank_event *event;
153 * A flag that's set after drm_atomic_helper_setup_commit() takes a
154 * second reference for the completion of $drm_crtc_state.event. It's
155 * used by the free code to remove the second reference if commit fails.
157 bool abort_completion;
160 struct __drm_planes_state {
161 struct drm_plane *ptr;
162 struct drm_plane_state *state, *old_state, *new_state;
165 struct __drm_crtcs_state {
166 struct drm_crtc *ptr;
167 struct drm_crtc_state *state, *old_state, *new_state;
172 * A reference to the CRTC commit object that is kept for use by
173 * drm_atomic_helper_wait_for_flip_done() after
174 * drm_atomic_helper_commit_hw_done() is called. This ensures that a
175 * concurrent commit won't free a commit object that is still in use.
177 struct drm_crtc_commit *commit;
179 s32 __user *out_fence_ptr;
180 u64 last_vblank_count;
183 struct __drm_connnectors_state {
184 struct drm_connector *ptr;
185 struct drm_connector_state *state, *old_state, *new_state;
189 * User-provided pointer which the kernel uses to return a sync_file
190 * file descriptor. Used by writeback connectors to signal completion of
193 s32 __user *out_fence_ptr;
196 struct drm_private_obj;
197 struct drm_private_state;
200 * struct drm_private_state_funcs - atomic state functions for private objects
202 * These hooks are used by atomic helpers to create, swap and destroy states of
203 * private objects. The structure itself is used as a vtable to identify the
204 * associated private object type. Each private object type that needs to be
205 * added to the atomic states is expected to have an implementation of these
206 * hooks and pass a pointer to its drm_private_state_funcs struct to
207 * drm_atomic_get_private_obj_state().
209 struct drm_private_state_funcs {
211 * @atomic_duplicate_state:
213 * Duplicate the current state of the private object and return it. It
214 * is an error to call this before obj->state has been initialized.
218 * Duplicated atomic state or NULL when obj->state is not
219 * initialized or allocation failed.
221 struct drm_private_state *(*atomic_duplicate_state)(struct drm_private_obj *obj);
224 * @atomic_destroy_state:
226 * Frees the private object state created with @atomic_duplicate_state.
228 void (*atomic_destroy_state)(struct drm_private_obj *obj,
229 struct drm_private_state *state);
233 * struct drm_private_obj - base struct for driver private atomic object
235 * A driver private object is initialized by calling
236 * drm_atomic_private_obj_init() and cleaned up by calling
237 * drm_atomic_private_obj_fini().
239 * Currently only tracks the state update functions and the opaque driver
240 * private state itself, but in the future might also track which
241 * &drm_modeset_lock is required to duplicate and update this object's state.
243 * All private objects must be initialized before the DRM device they are
244 * attached to is registered to the DRM subsystem (call to drm_dev_register())
245 * and should stay around until this DRM device is unregistered (call to
246 * drm_dev_unregister()). In other words, private objects lifetime is tied
247 * to the DRM device lifetime. This implies that:
249 * 1/ all calls to drm_atomic_private_obj_init() must be done before calling
251 * 2/ all calls to drm_atomic_private_obj_fini() must be done after calling
252 * drm_dev_unregister()
254 * If that private object is used to store a state shared by multiple
255 * CRTCs, proper care must be taken to ensure that non-blocking commits are
256 * properly ordered to avoid a use-after-free issue.
258 * Indeed, assuming a sequence of two non-blocking &drm_atomic_commit on two
259 * different &drm_crtc using different &drm_plane and &drm_connector, so with no
260 * resources shared, there's no guarantee on which commit is going to happen
261 * first. However, the second &drm_atomic_commit will consider the first
262 * &drm_private_obj its old state, and will be in charge of freeing it whenever
263 * the second &drm_atomic_commit is done.
265 * If the first &drm_atomic_commit happens after it, it will consider its
266 * &drm_private_obj the new state and will be likely to access it, resulting in
267 * an access to a freed memory region. Drivers should store (and get a reference
268 * to) the &drm_crtc_commit structure in our private state in
269 * &drm_mode_config_helper_funcs.atomic_commit_setup, and then wait for that
270 * commit to complete as the first step of
271 * &drm_mode_config_helper_funcs.atomic_commit_tail, similar to
272 * drm_atomic_helper_wait_for_dependencies().
274 struct drm_private_obj {
276 * @head: List entry used to attach a private object to a &drm_device
277 * (queued to &drm_mode_config.privobj_list).
279 struct list_head head;
282 * @lock: Modeset lock to protect the state object.
284 struct drm_modeset_lock lock;
287 * @state: Current atomic state for this driver private object.
289 struct drm_private_state *state;
294 * Functions to manipulate the state of this driver private object, see
295 * &drm_private_state_funcs.
297 const struct drm_private_state_funcs *funcs;
301 * drm_for_each_privobj() - private object iterator
303 * @privobj: pointer to the current private object. Updated after each
305 * @dev: the DRM device we want get private objects from
307 * Allows one to iterate over all private objects attached to @dev
309 #define drm_for_each_privobj(privobj, dev) \
310 list_for_each_entry(privobj, &(dev)->mode_config.privobj_list, head)
313 * struct drm_private_state - base struct for driver private object state
314 * @state: backpointer to global drm_atomic_state
316 * Currently only contains a backpointer to the overall atomic update, but in
317 * the future also might hold synchronization information similar to e.g.
320 struct drm_private_state {
321 struct drm_atomic_state *state;
324 struct __drm_private_objs_state {
325 struct drm_private_obj *ptr;
326 struct drm_private_state *state, *old_state, *new_state;
330 * struct drm_atomic_state - the global state object for atomic updates
331 * @ref: count of all references to this state (will not be freed until zero)
332 * @dev: parent DRM device
333 * @async_update: hint for asynchronous plane update
334 * @planes: pointer to array of structures with per-plane data
335 * @crtcs: pointer to array of CRTC pointers
336 * @num_connector: size of the @connectors and @connector_states arrays
337 * @connectors: pointer to array of structures with per-connector data
338 * @num_private_objs: size of the @private_objs array
339 * @private_objs: pointer to array of private object pointers
340 * @acquire_ctx: acquire context for this atomic modeset state update
342 * States are added to an atomic update by calling drm_atomic_get_crtc_state(),
343 * drm_atomic_get_plane_state(), drm_atomic_get_connector_state(), or for
344 * private state structures, drm_atomic_get_private_obj_state().
346 struct drm_atomic_state {
349 struct drm_device *dev;
354 * Allow full modeset. This is used by the ATOMIC IOCTL handler to
355 * implement the DRM_MODE_ATOMIC_ALLOW_MODESET flag. Drivers should
356 * never consult this flag, instead looking at the output of
357 * drm_atomic_crtc_needs_modeset().
359 bool allow_modeset : 1;
361 * @legacy_cursor_update:
363 * Hint to enforce legacy cursor IOCTL semantics.
365 * WARNING: This is thoroughly broken and pretty much impossible to
366 * implement correctly. Drivers must ignore this and should instead
367 * implement &drm_plane_helper_funcs.atomic_async_check and
368 * &drm_plane_helper_funcs.atomic_async_commit hooks. New users of this
369 * flag are not allowed.
371 bool legacy_cursor_update : 1;
372 bool async_update : 1;
376 * Indicates whether or not this atomic state was duplicated using
377 * drm_atomic_helper_duplicate_state(). Drivers and atomic helpers
378 * should use this to fixup normal inconsistencies in duplicated
382 struct __drm_planes_state *planes;
383 struct __drm_crtcs_state *crtcs;
385 struct __drm_connnectors_state *connectors;
386 int num_private_objs;
387 struct __drm_private_objs_state *private_objs;
389 struct drm_modeset_acquire_ctx *acquire_ctx;
394 * Used for signaling unbound planes/connectors.
395 * When a connector or plane is not bound to any CRTC, it's still important
396 * to preserve linearity to prevent the atomic states from being freed to early.
398 * This commit (if set) is not bound to any CRTC, but will be completed when
399 * drm_atomic_helper_commit_hw_done() is called.
401 struct drm_crtc_commit *fake_commit;
406 * Work item which can be used by the driver or helpers to execute the
407 * commit without blocking.
409 struct work_struct commit_work;
412 void __drm_crtc_commit_free(struct kref *kref);
415 * drm_crtc_commit_get - acquire a reference to the CRTC commit
416 * @commit: CRTC commit
418 * Increases the reference of @commit.
421 * The pointer to @commit, with reference increased.
423 static inline struct drm_crtc_commit *drm_crtc_commit_get(struct drm_crtc_commit *commit)
425 kref_get(&commit->ref);
430 * drm_crtc_commit_put - release a reference to the CRTC commmit
431 * @commit: CRTC commit
433 * This releases a reference to @commit which is freed after removing the
434 * final reference. No locking required and callable from any context.
436 static inline void drm_crtc_commit_put(struct drm_crtc_commit *commit)
438 kref_put(&commit->ref, __drm_crtc_commit_free);
441 int drm_crtc_commit_wait(struct drm_crtc_commit *commit);
443 struct drm_atomic_state * __must_check
444 drm_atomic_state_alloc(struct drm_device *dev);
445 void drm_atomic_state_clear(struct drm_atomic_state *state);
448 * drm_atomic_state_get - acquire a reference to the atomic state
449 * @state: The atomic state
451 * Returns a new reference to the @state
453 static inline struct drm_atomic_state *
454 drm_atomic_state_get(struct drm_atomic_state *state)
456 kref_get(&state->ref);
460 void __drm_atomic_state_free(struct kref *ref);
463 * drm_atomic_state_put - release a reference to the atomic state
464 * @state: The atomic state
466 * This releases a reference to @state which is freed after removing the
467 * final reference. No locking required and callable from any context.
469 static inline void drm_atomic_state_put(struct drm_atomic_state *state)
471 kref_put(&state->ref, __drm_atomic_state_free);
475 drm_atomic_state_init(struct drm_device *dev, struct drm_atomic_state *state);
476 void drm_atomic_state_default_clear(struct drm_atomic_state *state);
477 void drm_atomic_state_default_release(struct drm_atomic_state *state);
479 struct drm_crtc_state * __must_check
480 drm_atomic_get_crtc_state(struct drm_atomic_state *state,
481 struct drm_crtc *crtc);
482 struct drm_plane_state * __must_check
483 drm_atomic_get_plane_state(struct drm_atomic_state *state,
484 struct drm_plane *plane);
485 struct drm_connector_state * __must_check
486 drm_atomic_get_connector_state(struct drm_atomic_state *state,
487 struct drm_connector *connector);
489 void drm_atomic_private_obj_init(struct drm_device *dev,
490 struct drm_private_obj *obj,
491 struct drm_private_state *state,
492 const struct drm_private_state_funcs *funcs);
493 void drm_atomic_private_obj_fini(struct drm_private_obj *obj);
495 struct drm_private_state * __must_check
496 drm_atomic_get_private_obj_state(struct drm_atomic_state *state,
497 struct drm_private_obj *obj);
498 struct drm_private_state *
499 drm_atomic_get_old_private_obj_state(struct drm_atomic_state *state,
500 struct drm_private_obj *obj);
501 struct drm_private_state *
502 drm_atomic_get_new_private_obj_state(struct drm_atomic_state *state,
503 struct drm_private_obj *obj);
505 struct drm_connector *
506 drm_atomic_get_old_connector_for_encoder(struct drm_atomic_state *state,
507 struct drm_encoder *encoder);
508 struct drm_connector *
509 drm_atomic_get_new_connector_for_encoder(struct drm_atomic_state *state,
510 struct drm_encoder *encoder);
513 * drm_atomic_get_existing_crtc_state - get CRTC state, if it exists
514 * @state: global atomic state object
515 * @crtc: CRTC to grab
517 * This function returns the CRTC state for the given CRTC, or NULL
518 * if the CRTC is not part of the global atomic state.
520 * This function is deprecated, @drm_atomic_get_old_crtc_state or
521 * @drm_atomic_get_new_crtc_state should be used instead.
523 static inline struct drm_crtc_state *
524 drm_atomic_get_existing_crtc_state(struct drm_atomic_state *state,
525 struct drm_crtc *crtc)
527 return state->crtcs[drm_crtc_index(crtc)].state;
531 * drm_atomic_get_old_crtc_state - get old CRTC state, if it exists
532 * @state: global atomic state object
533 * @crtc: CRTC to grab
535 * This function returns the old CRTC state for the given CRTC, or
536 * NULL if the CRTC is not part of the global atomic state.
538 static inline struct drm_crtc_state *
539 drm_atomic_get_old_crtc_state(struct drm_atomic_state *state,
540 struct drm_crtc *crtc)
542 return state->crtcs[drm_crtc_index(crtc)].old_state;
545 * drm_atomic_get_new_crtc_state - get new CRTC state, if it exists
546 * @state: global atomic state object
547 * @crtc: CRTC to grab
549 * This function returns the new CRTC state for the given CRTC, or
550 * NULL if the CRTC is not part of the global atomic state.
552 static inline struct drm_crtc_state *
553 drm_atomic_get_new_crtc_state(struct drm_atomic_state *state,
554 struct drm_crtc *crtc)
556 return state->crtcs[drm_crtc_index(crtc)].new_state;
560 * drm_atomic_get_existing_plane_state - get plane state, if it exists
561 * @state: global atomic state object
562 * @plane: plane to grab
564 * This function returns the plane state for the given plane, or NULL
565 * if the plane is not part of the global atomic state.
567 * This function is deprecated, @drm_atomic_get_old_plane_state or
568 * @drm_atomic_get_new_plane_state should be used instead.
570 static inline struct drm_plane_state *
571 drm_atomic_get_existing_plane_state(struct drm_atomic_state *state,
572 struct drm_plane *plane)
574 return state->planes[drm_plane_index(plane)].state;
578 * drm_atomic_get_old_plane_state - get plane state, if it exists
579 * @state: global atomic state object
580 * @plane: plane to grab
582 * This function returns the old plane state for the given plane, or
583 * NULL if the plane is not part of the global atomic state.
585 static inline struct drm_plane_state *
586 drm_atomic_get_old_plane_state(struct drm_atomic_state *state,
587 struct drm_plane *plane)
589 return state->planes[drm_plane_index(plane)].old_state;
593 * drm_atomic_get_new_plane_state - get plane state, if it exists
594 * @state: global atomic state object
595 * @plane: plane to grab
597 * This function returns the new plane state for the given plane, or
598 * NULL if the plane is not part of the global atomic state.
600 static inline struct drm_plane_state *
601 drm_atomic_get_new_plane_state(struct drm_atomic_state *state,
602 struct drm_plane *plane)
604 return state->planes[drm_plane_index(plane)].new_state;
608 * drm_atomic_get_existing_connector_state - get connector state, if it exists
609 * @state: global atomic state object
610 * @connector: connector to grab
612 * This function returns the connector state for the given connector,
613 * or NULL if the connector is not part of the global atomic state.
615 * This function is deprecated, @drm_atomic_get_old_connector_state or
616 * @drm_atomic_get_new_connector_state should be used instead.
618 static inline struct drm_connector_state *
619 drm_atomic_get_existing_connector_state(struct drm_atomic_state *state,
620 struct drm_connector *connector)
622 int index = drm_connector_index(connector);
624 if (index >= state->num_connector)
627 return state->connectors[index].state;
631 * drm_atomic_get_old_connector_state - get connector state, if it exists
632 * @state: global atomic state object
633 * @connector: connector to grab
635 * This function returns the old connector state for the given connector,
636 * or NULL if the connector is not part of the global atomic state.
638 static inline struct drm_connector_state *
639 drm_atomic_get_old_connector_state(struct drm_atomic_state *state,
640 struct drm_connector *connector)
642 int index = drm_connector_index(connector);
644 if (index >= state->num_connector)
647 return state->connectors[index].old_state;
651 * drm_atomic_get_new_connector_state - get connector state, if it exists
652 * @state: global atomic state object
653 * @connector: connector to grab
655 * This function returns the new connector state for the given connector,
656 * or NULL if the connector is not part of the global atomic state.
658 static inline struct drm_connector_state *
659 drm_atomic_get_new_connector_state(struct drm_atomic_state *state,
660 struct drm_connector *connector)
662 int index = drm_connector_index(connector);
664 if (index >= state->num_connector)
667 return state->connectors[index].new_state;
671 * __drm_atomic_get_current_plane_state - get current plane state
672 * @state: global atomic state object
673 * @plane: plane to grab
675 * This function returns the plane state for the given plane, either from
676 * @state, or if the plane isn't part of the atomic state update, from @plane.
677 * This is useful in atomic check callbacks, when drivers need to peek at, but
678 * not change, state of other planes, since it avoids threading an error code
679 * back up the call chain.
683 * Note that this function is in general unsafe since it doesn't check for the
684 * required locking for access state structures. Drivers must ensure that it is
685 * safe to access the returned state structure through other means. One common
686 * example is when planes are fixed to a single CRTC, and the driver knows that
687 * the CRTC lock is held already. In that case holding the CRTC lock gives a
688 * read-lock on all planes connected to that CRTC. But if planes can be
689 * reassigned things get more tricky. In that case it's better to use
690 * drm_atomic_get_plane_state and wire up full error handling.
694 * Read-only pointer to the current plane state.
696 static inline const struct drm_plane_state *
697 __drm_atomic_get_current_plane_state(struct drm_atomic_state *state,
698 struct drm_plane *plane)
700 if (state->planes[drm_plane_index(plane)].state)
701 return state->planes[drm_plane_index(plane)].state;
707 drm_atomic_add_encoder_bridges(struct drm_atomic_state *state,
708 struct drm_encoder *encoder);
710 drm_atomic_add_affected_connectors(struct drm_atomic_state *state,
711 struct drm_crtc *crtc);
713 drm_atomic_add_affected_planes(struct drm_atomic_state *state,
714 struct drm_crtc *crtc);
716 int __must_check drm_atomic_check_only(struct drm_atomic_state *state);
717 int __must_check drm_atomic_commit(struct drm_atomic_state *state);
718 int __must_check drm_atomic_nonblocking_commit(struct drm_atomic_state *state);
720 void drm_state_dump(struct drm_device *dev, struct drm_printer *p);
723 * for_each_oldnew_connector_in_state - iterate over all connectors in an atomic update
724 * @__state: &struct drm_atomic_state pointer
725 * @connector: &struct drm_connector iteration cursor
726 * @old_connector_state: &struct drm_connector_state iteration cursor for the
728 * @new_connector_state: &struct drm_connector_state iteration cursor for the
730 * @__i: int iteration cursor, for macro-internal use
732 * This iterates over all connectors in an atomic update, tracking both old and
733 * new state. This is useful in places where the state delta needs to be
734 * considered, for example in atomic check functions.
736 #define for_each_oldnew_connector_in_state(__state, connector, old_connector_state, new_connector_state, __i) \
738 (__i) < (__state)->num_connector; \
740 for_each_if ((__state)->connectors[__i].ptr && \
741 ((connector) = (__state)->connectors[__i].ptr, \
742 (void)(connector) /* Only to avoid unused-but-set-variable warning */, \
743 (old_connector_state) = (__state)->connectors[__i].old_state, \
744 (new_connector_state) = (__state)->connectors[__i].new_state, 1))
747 * for_each_old_connector_in_state - iterate over all connectors in an atomic update
748 * @__state: &struct drm_atomic_state pointer
749 * @connector: &struct drm_connector iteration cursor
750 * @old_connector_state: &struct drm_connector_state iteration cursor for the
752 * @__i: int iteration cursor, for macro-internal use
754 * This iterates over all connectors in an atomic update, tracking only the old
755 * state. This is useful in disable functions, where we need the old state the
756 * hardware is still in.
758 #define for_each_old_connector_in_state(__state, connector, old_connector_state, __i) \
760 (__i) < (__state)->num_connector; \
762 for_each_if ((__state)->connectors[__i].ptr && \
763 ((connector) = (__state)->connectors[__i].ptr, \
764 (void)(connector) /* Only to avoid unused-but-set-variable warning */, \
765 (old_connector_state) = (__state)->connectors[__i].old_state, 1))
768 * for_each_new_connector_in_state - iterate over all connectors in an atomic update
769 * @__state: &struct drm_atomic_state pointer
770 * @connector: &struct drm_connector iteration cursor
771 * @new_connector_state: &struct drm_connector_state iteration cursor for the
773 * @__i: int iteration cursor, for macro-internal use
775 * This iterates over all connectors in an atomic update, tracking only the new
776 * state. This is useful in enable functions, where we need the new state the
777 * hardware should be in when the atomic commit operation has completed.
779 #define for_each_new_connector_in_state(__state, connector, new_connector_state, __i) \
781 (__i) < (__state)->num_connector; \
783 for_each_if ((__state)->connectors[__i].ptr && \
784 ((connector) = (__state)->connectors[__i].ptr, \
785 (void)(connector) /* Only to avoid unused-but-set-variable warning */, \
786 (new_connector_state) = (__state)->connectors[__i].new_state, \
787 (void)(new_connector_state) /* Only to avoid unused-but-set-variable warning */, 1))
790 * for_each_oldnew_crtc_in_state - iterate over all CRTCs in an atomic update
791 * @__state: &struct drm_atomic_state pointer
792 * @crtc: &struct drm_crtc iteration cursor
793 * @old_crtc_state: &struct drm_crtc_state iteration cursor for the old state
794 * @new_crtc_state: &struct drm_crtc_state iteration cursor for the new state
795 * @__i: int iteration cursor, for macro-internal use
797 * This iterates over all CRTCs in an atomic update, tracking both old and
798 * new state. This is useful in places where the state delta needs to be
799 * considered, for example in atomic check functions.
801 #define for_each_oldnew_crtc_in_state(__state, crtc, old_crtc_state, new_crtc_state, __i) \
803 (__i) < (__state)->dev->mode_config.num_crtc; \
805 for_each_if ((__state)->crtcs[__i].ptr && \
806 ((crtc) = (__state)->crtcs[__i].ptr, \
807 (void)(crtc) /* Only to avoid unused-but-set-variable warning */, \
808 (old_crtc_state) = (__state)->crtcs[__i].old_state, \
809 (void)(old_crtc_state) /* Only to avoid unused-but-set-variable warning */, \
810 (new_crtc_state) = (__state)->crtcs[__i].new_state, \
811 (void)(new_crtc_state) /* Only to avoid unused-but-set-variable warning */, 1))
814 * for_each_old_crtc_in_state - iterate over all CRTCs in an atomic update
815 * @__state: &struct drm_atomic_state pointer
816 * @crtc: &struct drm_crtc iteration cursor
817 * @old_crtc_state: &struct drm_crtc_state iteration cursor for the old state
818 * @__i: int iteration cursor, for macro-internal use
820 * This iterates over all CRTCs in an atomic update, tracking only the old
821 * state. This is useful in disable functions, where we need the old state the
822 * hardware is still in.
824 #define for_each_old_crtc_in_state(__state, crtc, old_crtc_state, __i) \
826 (__i) < (__state)->dev->mode_config.num_crtc; \
828 for_each_if ((__state)->crtcs[__i].ptr && \
829 ((crtc) = (__state)->crtcs[__i].ptr, \
830 (void)(crtc) /* Only to avoid unused-but-set-variable warning */, \
831 (old_crtc_state) = (__state)->crtcs[__i].old_state, 1))
834 * for_each_new_crtc_in_state - iterate over all CRTCs in an atomic update
835 * @__state: &struct drm_atomic_state pointer
836 * @crtc: &struct drm_crtc iteration cursor
837 * @new_crtc_state: &struct drm_crtc_state iteration cursor for the new state
838 * @__i: int iteration cursor, for macro-internal use
840 * This iterates over all CRTCs in an atomic update, tracking only the new
841 * state. This is useful in enable functions, where we need the new state the
842 * hardware should be in when the atomic commit operation has completed.
844 #define for_each_new_crtc_in_state(__state, crtc, new_crtc_state, __i) \
846 (__i) < (__state)->dev->mode_config.num_crtc; \
848 for_each_if ((__state)->crtcs[__i].ptr && \
849 ((crtc) = (__state)->crtcs[__i].ptr, \
850 (void)(crtc) /* Only to avoid unused-but-set-variable warning */, \
851 (new_crtc_state) = (__state)->crtcs[__i].new_state, \
852 (void)(new_crtc_state) /* Only to avoid unused-but-set-variable warning */, 1))
855 * for_each_oldnew_plane_in_state - iterate over all planes in an atomic update
856 * @__state: &struct drm_atomic_state pointer
857 * @plane: &struct drm_plane iteration cursor
858 * @old_plane_state: &struct drm_plane_state iteration cursor for the old state
859 * @new_plane_state: &struct drm_plane_state iteration cursor for the new state
860 * @__i: int iteration cursor, for macro-internal use
862 * This iterates over all planes in an atomic update, tracking both old and
863 * new state. This is useful in places where the state delta needs to be
864 * considered, for example in atomic check functions.
866 #define for_each_oldnew_plane_in_state(__state, plane, old_plane_state, new_plane_state, __i) \
868 (__i) < (__state)->dev->mode_config.num_total_plane; \
870 for_each_if ((__state)->planes[__i].ptr && \
871 ((plane) = (__state)->planes[__i].ptr, \
872 (void)(plane) /* Only to avoid unused-but-set-variable warning */, \
873 (old_plane_state) = (__state)->planes[__i].old_state,\
874 (new_plane_state) = (__state)->planes[__i].new_state, 1))
877 * for_each_oldnew_plane_in_state_reverse - iterate over all planes in an atomic
878 * update in reverse order
879 * @__state: &struct drm_atomic_state pointer
880 * @plane: &struct drm_plane iteration cursor
881 * @old_plane_state: &struct drm_plane_state iteration cursor for the old state
882 * @new_plane_state: &struct drm_plane_state iteration cursor for the new state
883 * @__i: int iteration cursor, for macro-internal use
885 * This iterates over all planes in an atomic update in reverse order,
886 * tracking both old and new state. This is useful in places where the
887 * state delta needs to be considered, for example in atomic check functions.
889 #define for_each_oldnew_plane_in_state_reverse(__state, plane, old_plane_state, new_plane_state, __i) \
890 for ((__i) = ((__state)->dev->mode_config.num_total_plane - 1); \
893 for_each_if ((__state)->planes[__i].ptr && \
894 ((plane) = (__state)->planes[__i].ptr, \
895 (old_plane_state) = (__state)->planes[__i].old_state,\
896 (new_plane_state) = (__state)->planes[__i].new_state, 1))
899 * for_each_new_plane_in_state_reverse - other than only tracking new state,
900 * it's the same as for_each_oldnew_plane_in_state_reverse
901 * @__state: &struct drm_atomic_state pointer
902 * @plane: &struct drm_plane iteration cursor
903 * @new_plane_state: &struct drm_plane_state iteration cursor for the new state
904 * @__i: int iteration cursor, for macro-internal use
906 #define for_each_new_plane_in_state_reverse(__state, plane, new_plane_state, __i) \
907 for ((__i) = ((__state)->dev->mode_config.num_total_plane - 1); \
910 for_each_if ((__state)->planes[__i].ptr && \
911 ((plane) = (__state)->planes[__i].ptr, \
912 (new_plane_state) = (__state)->planes[__i].new_state, 1))
915 * for_each_old_plane_in_state - iterate over all planes in an atomic update
916 * @__state: &struct drm_atomic_state pointer
917 * @plane: &struct drm_plane iteration cursor
918 * @old_plane_state: &struct drm_plane_state iteration cursor for the old state
919 * @__i: int iteration cursor, for macro-internal use
921 * This iterates over all planes in an atomic update, tracking only the old
922 * state. This is useful in disable functions, where we need the old state the
923 * hardware is still in.
925 #define for_each_old_plane_in_state(__state, plane, old_plane_state, __i) \
927 (__i) < (__state)->dev->mode_config.num_total_plane; \
929 for_each_if ((__state)->planes[__i].ptr && \
930 ((plane) = (__state)->planes[__i].ptr, \
931 (old_plane_state) = (__state)->planes[__i].old_state, 1))
933 * for_each_new_plane_in_state - iterate over all planes in an atomic update
934 * @__state: &struct drm_atomic_state pointer
935 * @plane: &struct drm_plane iteration cursor
936 * @new_plane_state: &struct drm_plane_state iteration cursor for the new state
937 * @__i: int iteration cursor, for macro-internal use
939 * This iterates over all planes in an atomic update, tracking only the new
940 * state. This is useful in enable functions, where we need the new state the
941 * hardware should be in when the atomic commit operation has completed.
943 #define for_each_new_plane_in_state(__state, plane, new_plane_state, __i) \
945 (__i) < (__state)->dev->mode_config.num_total_plane; \
947 for_each_if ((__state)->planes[__i].ptr && \
948 ((plane) = (__state)->planes[__i].ptr, \
949 (void)(plane) /* Only to avoid unused-but-set-variable warning */, \
950 (new_plane_state) = (__state)->planes[__i].new_state, \
951 (void)(new_plane_state) /* Only to avoid unused-but-set-variable warning */, 1))
954 * for_each_oldnew_private_obj_in_state - iterate over all private objects in an atomic update
955 * @__state: &struct drm_atomic_state pointer
956 * @obj: &struct drm_private_obj iteration cursor
957 * @old_obj_state: &struct drm_private_state iteration cursor for the old state
958 * @new_obj_state: &struct drm_private_state iteration cursor for the new state
959 * @__i: int iteration cursor, for macro-internal use
961 * This iterates over all private objects in an atomic update, tracking both
962 * old and new state. This is useful in places where the state delta needs
963 * to be considered, for example in atomic check functions.
965 #define for_each_oldnew_private_obj_in_state(__state, obj, old_obj_state, new_obj_state, __i) \
967 (__i) < (__state)->num_private_objs && \
968 ((obj) = (__state)->private_objs[__i].ptr, \
969 (old_obj_state) = (__state)->private_objs[__i].old_state, \
970 (new_obj_state) = (__state)->private_objs[__i].new_state, 1); \
974 * for_each_old_private_obj_in_state - iterate over all private objects in an atomic update
975 * @__state: &struct drm_atomic_state pointer
976 * @obj: &struct drm_private_obj iteration cursor
977 * @old_obj_state: &struct drm_private_state iteration cursor for the old state
978 * @__i: int iteration cursor, for macro-internal use
980 * This iterates over all private objects in an atomic update, tracking only
981 * the old state. This is useful in disable functions, where we need the old
982 * state the hardware is still in.
984 #define for_each_old_private_obj_in_state(__state, obj, old_obj_state, __i) \
986 (__i) < (__state)->num_private_objs && \
987 ((obj) = (__state)->private_objs[__i].ptr, \
988 (old_obj_state) = (__state)->private_objs[__i].old_state, 1); \
992 * for_each_new_private_obj_in_state - iterate over all private objects in an atomic update
993 * @__state: &struct drm_atomic_state pointer
994 * @obj: &struct drm_private_obj iteration cursor
995 * @new_obj_state: &struct drm_private_state iteration cursor for the new state
996 * @__i: int iteration cursor, for macro-internal use
998 * This iterates over all private objects in an atomic update, tracking only
999 * the new state. This is useful in enable functions, where we need the new state the
1000 * hardware should be in when the atomic commit operation has completed.
1002 #define for_each_new_private_obj_in_state(__state, obj, new_obj_state, __i) \
1004 (__i) < (__state)->num_private_objs && \
1005 ((obj) = (__state)->private_objs[__i].ptr, \
1006 (new_obj_state) = (__state)->private_objs[__i].new_state, 1); \
1010 * drm_atomic_crtc_needs_modeset - compute combined modeset need
1011 * @state: &drm_crtc_state for the CRTC
1013 * To give drivers flexibility &struct drm_crtc_state has 3 booleans to track
1014 * whether the state CRTC changed enough to need a full modeset cycle:
1015 * mode_changed, active_changed and connectors_changed. This helper simply
1016 * combines these three to compute the overall need for a modeset for @state.
1018 * The atomic helper code sets these booleans, but drivers can and should
1019 * change them appropriately to accurately represent whether a modeset is
1020 * really needed. In general, drivers should avoid full modesets whenever
1023 * For example if the CRTC mode has changed, and the hardware is able to enact
1024 * the requested mode change without going through a full modeset, the driver
1025 * should clear mode_changed in its &drm_mode_config_funcs.atomic_check
1029 drm_atomic_crtc_needs_modeset(const struct drm_crtc_state *state)
1031 return state->mode_changed || state->active_changed ||
1032 state->connectors_changed;
1036 * drm_atomic_crtc_effectively_active - compute whether CRTC is actually active
1037 * @state: &drm_crtc_state for the CRTC
1039 * When in self refresh mode, the crtc_state->active value will be false, since
1040 * the CRTC is off. However in some cases we're interested in whether the CRTC
1041 * is active, or effectively active (ie: it's connected to an active display).
1042 * In these cases, use this function instead of just checking active.
1045 drm_atomic_crtc_effectively_active(const struct drm_crtc_state *state)
1047 return state->active || state->self_refresh_active;
1051 * struct drm_bus_cfg - bus configuration
1053 * This structure stores the configuration of a physical bus between two
1054 * components in an output pipeline, usually between two bridges, an encoder
1055 * and a bridge, or a bridge and a connector.
1057 * The bus configuration is stored in &drm_bridge_state separately for the
1058 * input and output buses, as seen from the point of view of each bridge. The
1059 * bus configuration of a bridge output is usually identical to the
1060 * configuration of the next bridge's input, but may differ if the signals are
1061 * modified between the two bridges, for instance by an inverter on the board.
1062 * The input and output configurations of a bridge may differ if the bridge
1063 * modifies the signals internally, for instance by performing format
1064 * conversion, or modifying signals polarities.
1066 struct drm_bus_cfg {
1068 * @format: format used on this bus (one of the MEDIA_BUS_FMT_* format)
1070 * This field should not be directly modified by drivers
1071 * (drm_atomic_bridge_chain_select_bus_fmts() takes care of the bus
1072 * format negotiation).
1077 * @flags: DRM_BUS_* flags used on this bus
1083 * struct drm_bridge_state - Atomic bridge state object
1085 struct drm_bridge_state {
1087 * @base: inherit from &drm_private_state
1089 struct drm_private_state base;
1092 * @bridge: the bridge this state refers to
1094 struct drm_bridge *bridge;
1097 * @input_bus_cfg: input bus configuration
1099 struct drm_bus_cfg input_bus_cfg;
1102 * @output_bus_cfg: input bus configuration
1104 struct drm_bus_cfg output_bus_cfg;
1107 static inline struct drm_bridge_state *
1108 drm_priv_to_bridge_state(struct drm_private_state *priv)
1110 return container_of(priv, struct drm_bridge_state, base);
1113 struct drm_bridge_state *
1114 drm_atomic_get_bridge_state(struct drm_atomic_state *state,
1115 struct drm_bridge *bridge);
1116 struct drm_bridge_state *
1117 drm_atomic_get_old_bridge_state(struct drm_atomic_state *state,
1118 struct drm_bridge *bridge);
1119 struct drm_bridge_state *
1120 drm_atomic_get_new_bridge_state(struct drm_atomic_state *state,
1121 struct drm_bridge *bridge);
1123 #endif /* DRM_ATOMIC_H_ */