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 * Completion of this stage is signalled implicitly by calling
97 * drm_crtc_send_vblank_event() on &drm_crtc_state.event.
99 struct completion flip_done;
104 * Will be signalled when all hw register changes for this commit have
105 * been written out. Especially when disabling a pipe this can be much
106 * later than @flip_done, since that can signal already when the
107 * screen goes black, whereas to fully shut down a pipe more register
110 * Note that this does not need to include separately reference-counted
111 * resources like backing storage buffer pinning, or runtime pm
114 * Drivers should call drm_atomic_helper_commit_hw_done() to signal
115 * completion of this stage.
117 struct completion hw_done;
122 * Will be signalled after old buffers have been cleaned up by calling
123 * drm_atomic_helper_cleanup_planes(). Since this can only happen after
124 * a vblank wait completed it might be a bit later. This completion is
125 * useful to throttle updates and avoid hardware updates getting ahead
126 * of the buffer cleanup too much.
128 * Drivers should call drm_atomic_helper_commit_cleanup_done() to signal
129 * completion of this stage.
131 struct completion cleanup_done;
136 * Entry on the per-CRTC &drm_crtc.commit_list. Protected by
137 * $drm_crtc.commit_lock.
139 struct list_head commit_entry;
144 * &drm_pending_vblank_event pointer to clean up private events.
146 struct drm_pending_vblank_event *event;
151 * A flag that's set after drm_atomic_helper_setup_commit() takes a
152 * second reference for the completion of $drm_crtc_state.event. It's
153 * used by the free code to remove the second reference if commit fails.
155 bool abort_completion;
158 struct __drm_planes_state {
159 struct drm_plane *ptr;
160 struct drm_plane_state *state, *old_state, *new_state;
163 struct __drm_crtcs_state {
164 struct drm_crtc *ptr;
165 struct drm_crtc_state *state, *old_state, *new_state;
170 * A reference to the CRTC commit object that is kept for use by
171 * drm_atomic_helper_wait_for_flip_done() after
172 * drm_atomic_helper_commit_hw_done() is called. This ensures that a
173 * concurrent commit won't free a commit object that is still in use.
175 struct drm_crtc_commit *commit;
177 s32 __user *out_fence_ptr;
178 u64 last_vblank_count;
181 struct __drm_connnectors_state {
182 struct drm_connector *ptr;
183 struct drm_connector_state *state, *old_state, *new_state;
187 * User-provided pointer which the kernel uses to return a sync_file
188 * file descriptor. Used by writeback connectors to signal completion of
191 s32 __user *out_fence_ptr;
194 struct drm_private_obj;
195 struct drm_private_state;
198 * struct drm_private_state_funcs - atomic state functions for private objects
200 * These hooks are used by atomic helpers to create, swap and destroy states of
201 * private objects. The structure itself is used as a vtable to identify the
202 * associated private object type. Each private object type that needs to be
203 * added to the atomic states is expected to have an implementation of these
204 * hooks and pass a pointer to its drm_private_state_funcs struct to
205 * drm_atomic_get_private_obj_state().
207 struct drm_private_state_funcs {
209 * @atomic_duplicate_state:
211 * Duplicate the current state of the private object and return it. It
212 * is an error to call this before obj->state has been initialized.
216 * Duplicated atomic state or NULL when obj->state is not
217 * initialized or allocation failed.
219 struct drm_private_state *(*atomic_duplicate_state)(struct drm_private_obj *obj);
222 * @atomic_destroy_state:
224 * Frees the private object state created with @atomic_duplicate_state.
226 void (*atomic_destroy_state)(struct drm_private_obj *obj,
227 struct drm_private_state *state);
231 * struct drm_private_obj - base struct for driver private atomic object
233 * A driver private object is initialized by calling
234 * drm_atomic_private_obj_init() and cleaned up by calling
235 * drm_atomic_private_obj_fini().
237 * Currently only tracks the state update functions and the opaque driver
238 * private state itself, but in the future might also track which
239 * &drm_modeset_lock is required to duplicate and update this object's state.
241 * All private objects must be initialized before the DRM device they are
242 * attached to is registered to the DRM subsystem (call to drm_dev_register())
243 * and should stay around until this DRM device is unregistered (call to
244 * drm_dev_unregister()). In other words, private objects lifetime is tied
245 * to the DRM device lifetime. This implies that:
247 * 1/ all calls to drm_atomic_private_obj_init() must be done before calling
249 * 2/ all calls to drm_atomic_private_obj_fini() must be done after calling
250 * drm_dev_unregister()
252 * If that private object is used to store a state shared by multiple
253 * CRTCs, proper care must be taken to ensure that non-blocking commits are
254 * properly ordered to avoid a use-after-free issue.
256 * Indeed, assuming a sequence of two non-blocking &drm_atomic_commit on two
257 * different &drm_crtc using different &drm_plane and &drm_connector, so with no
258 * resources shared, there's no guarantee on which commit is going to happen
259 * first. However, the second &drm_atomic_commit will consider the first
260 * &drm_private_obj its old state, and will be in charge of freeing it whenever
261 * the second &drm_atomic_commit is done.
263 * If the first &drm_atomic_commit happens after it, it will consider its
264 * &drm_private_obj the new state and will be likely to access it, resulting in
265 * an access to a freed memory region. Drivers should store (and get a reference
266 * to) the &drm_crtc_commit structure in our private state in
267 * &drm_mode_config_helper_funcs.atomic_commit_setup, and then wait for that
268 * commit to complete as the first step of
269 * &drm_mode_config_helper_funcs.atomic_commit_tail, similar to
270 * drm_atomic_helper_wait_for_dependencies().
272 struct drm_private_obj {
274 * @head: List entry used to attach a private object to a &drm_device
275 * (queued to &drm_mode_config.privobj_list).
277 struct list_head head;
280 * @lock: Modeset lock to protect the state object.
282 struct drm_modeset_lock lock;
285 * @state: Current atomic state for this driver private object.
287 struct drm_private_state *state;
292 * Functions to manipulate the state of this driver private object, see
293 * &drm_private_state_funcs.
295 const struct drm_private_state_funcs *funcs;
299 * drm_for_each_privobj() - private object iterator
301 * @privobj: pointer to the current private object. Updated after each
303 * @dev: the DRM device we want get private objects from
305 * Allows one to iterate over all private objects attached to @dev
307 #define drm_for_each_privobj(privobj, dev) \
308 list_for_each_entry(privobj, &(dev)->mode_config.privobj_list, head)
311 * struct drm_private_state - base struct for driver private object state
312 * @state: backpointer to global drm_atomic_state
314 * Currently only contains a backpointer to the overall atomic update, but in
315 * the future also might hold synchronization information similar to e.g.
318 struct drm_private_state {
319 struct drm_atomic_state *state;
322 struct __drm_private_objs_state {
323 struct drm_private_obj *ptr;
324 struct drm_private_state *state, *old_state, *new_state;
328 * struct drm_atomic_state - the global state object for atomic updates
329 * @ref: count of all references to this state (will not be freed until zero)
330 * @dev: parent DRM device
331 * @async_update: hint for asynchronous plane update
332 * @planes: pointer to array of structures with per-plane data
333 * @crtcs: pointer to array of CRTC pointers
334 * @num_connector: size of the @connectors and @connector_states arrays
335 * @connectors: pointer to array of structures with per-connector data
336 * @num_private_objs: size of the @private_objs array
337 * @private_objs: pointer to array of private object pointers
338 * @acquire_ctx: acquire context for this atomic modeset state update
340 * States are added to an atomic update by calling drm_atomic_get_crtc_state(),
341 * drm_atomic_get_plane_state(), drm_atomic_get_connector_state(), or for
342 * private state structures, drm_atomic_get_private_obj_state().
344 struct drm_atomic_state {
347 struct drm_device *dev;
352 * Allow full modeset. This is used by the ATOMIC IOCTL handler to
353 * implement the DRM_MODE_ATOMIC_ALLOW_MODESET flag. Drivers should
354 * never consult this flag, instead looking at the output of
355 * drm_atomic_crtc_needs_modeset().
357 bool allow_modeset : 1;
359 * @legacy_cursor_update:
361 * Hint to enforce legacy cursor IOCTL semantics.
363 * WARNING: This is thoroughly broken and pretty much impossible to
364 * implement correctly. Drivers must ignore this and should instead
365 * implement &drm_plane_helper_funcs.atomic_async_check and
366 * &drm_plane_helper_funcs.atomic_async_commit hooks. New users of this
367 * flag are not allowed.
369 bool legacy_cursor_update : 1;
370 bool async_update : 1;
374 * Indicates whether or not this atomic state was duplicated using
375 * drm_atomic_helper_duplicate_state(). Drivers and atomic helpers
376 * should use this to fixup normal inconsistencies in duplicated
380 struct __drm_planes_state *planes;
381 struct __drm_crtcs_state *crtcs;
383 struct __drm_connnectors_state *connectors;
384 int num_private_objs;
385 struct __drm_private_objs_state *private_objs;
387 struct drm_modeset_acquire_ctx *acquire_ctx;
392 * Used for signaling unbound planes/connectors.
393 * When a connector or plane is not bound to any CRTC, it's still important
394 * to preserve linearity to prevent the atomic states from being freed to early.
396 * This commit (if set) is not bound to any CRTC, but will be completed when
397 * drm_atomic_helper_commit_hw_done() is called.
399 struct drm_crtc_commit *fake_commit;
404 * Work item which can be used by the driver or helpers to execute the
405 * commit without blocking.
407 struct work_struct commit_work;
410 void __drm_crtc_commit_free(struct kref *kref);
413 * drm_crtc_commit_get - acquire a reference to the CRTC commit
414 * @commit: CRTC commit
416 * Increases the reference of @commit.
419 * The pointer to @commit, with reference increased.
421 static inline struct drm_crtc_commit *drm_crtc_commit_get(struct drm_crtc_commit *commit)
423 kref_get(&commit->ref);
428 * drm_crtc_commit_put - release a reference to the CRTC commmit
429 * @commit: CRTC commit
431 * This releases a reference to @commit which is freed after removing the
432 * final reference. No locking required and callable from any context.
434 static inline void drm_crtc_commit_put(struct drm_crtc_commit *commit)
436 kref_put(&commit->ref, __drm_crtc_commit_free);
439 struct drm_atomic_state * __must_check
440 drm_atomic_state_alloc(struct drm_device *dev);
441 void drm_atomic_state_clear(struct drm_atomic_state *state);
444 * drm_atomic_state_get - acquire a reference to the atomic state
445 * @state: The atomic state
447 * Returns a new reference to the @state
449 static inline struct drm_atomic_state *
450 drm_atomic_state_get(struct drm_atomic_state *state)
452 kref_get(&state->ref);
456 void __drm_atomic_state_free(struct kref *ref);
459 * drm_atomic_state_put - release a reference to the atomic state
460 * @state: The atomic state
462 * This releases a reference to @state which is freed after removing the
463 * final reference. No locking required and callable from any context.
465 static inline void drm_atomic_state_put(struct drm_atomic_state *state)
467 kref_put(&state->ref, __drm_atomic_state_free);
471 drm_atomic_state_init(struct drm_device *dev, struct drm_atomic_state *state);
472 void drm_atomic_state_default_clear(struct drm_atomic_state *state);
473 void drm_atomic_state_default_release(struct drm_atomic_state *state);
475 struct drm_crtc_state * __must_check
476 drm_atomic_get_crtc_state(struct drm_atomic_state *state,
477 struct drm_crtc *crtc);
478 struct drm_plane_state * __must_check
479 drm_atomic_get_plane_state(struct drm_atomic_state *state,
480 struct drm_plane *plane);
481 struct drm_connector_state * __must_check
482 drm_atomic_get_connector_state(struct drm_atomic_state *state,
483 struct drm_connector *connector);
485 void drm_atomic_private_obj_init(struct drm_device *dev,
486 struct drm_private_obj *obj,
487 struct drm_private_state *state,
488 const struct drm_private_state_funcs *funcs);
489 void drm_atomic_private_obj_fini(struct drm_private_obj *obj);
491 struct drm_private_state * __must_check
492 drm_atomic_get_private_obj_state(struct drm_atomic_state *state,
493 struct drm_private_obj *obj);
494 struct drm_private_state *
495 drm_atomic_get_old_private_obj_state(struct drm_atomic_state *state,
496 struct drm_private_obj *obj);
497 struct drm_private_state *
498 drm_atomic_get_new_private_obj_state(struct drm_atomic_state *state,
499 struct drm_private_obj *obj);
501 struct drm_connector *
502 drm_atomic_get_old_connector_for_encoder(struct drm_atomic_state *state,
503 struct drm_encoder *encoder);
504 struct drm_connector *
505 drm_atomic_get_new_connector_for_encoder(struct drm_atomic_state *state,
506 struct drm_encoder *encoder);
509 * drm_atomic_get_existing_crtc_state - get CRTC state, if it exists
510 * @state: global atomic state object
511 * @crtc: CRTC to grab
513 * This function returns the CRTC state for the given CRTC, or NULL
514 * if the CRTC is not part of the global atomic state.
516 * This function is deprecated, @drm_atomic_get_old_crtc_state or
517 * @drm_atomic_get_new_crtc_state should be used instead.
519 static inline struct drm_crtc_state *
520 drm_atomic_get_existing_crtc_state(struct drm_atomic_state *state,
521 struct drm_crtc *crtc)
523 return state->crtcs[drm_crtc_index(crtc)].state;
527 * drm_atomic_get_old_crtc_state - get old CRTC state, if it exists
528 * @state: global atomic state object
529 * @crtc: CRTC to grab
531 * This function returns the old CRTC state for the given CRTC, or
532 * NULL if the CRTC is not part of the global atomic state.
534 static inline struct drm_crtc_state *
535 drm_atomic_get_old_crtc_state(struct drm_atomic_state *state,
536 struct drm_crtc *crtc)
538 return state->crtcs[drm_crtc_index(crtc)].old_state;
541 * drm_atomic_get_new_crtc_state - get new CRTC state, if it exists
542 * @state: global atomic state object
543 * @crtc: CRTC to grab
545 * This function returns the new CRTC state for the given CRTC, or
546 * NULL if the CRTC is not part of the global atomic state.
548 static inline struct drm_crtc_state *
549 drm_atomic_get_new_crtc_state(struct drm_atomic_state *state,
550 struct drm_crtc *crtc)
552 return state->crtcs[drm_crtc_index(crtc)].new_state;
556 * drm_atomic_get_existing_plane_state - get plane state, if it exists
557 * @state: global atomic state object
558 * @plane: plane to grab
560 * This function returns the plane state for the given plane, or NULL
561 * if the plane is not part of the global atomic state.
563 * This function is deprecated, @drm_atomic_get_old_plane_state or
564 * @drm_atomic_get_new_plane_state should be used instead.
566 static inline struct drm_plane_state *
567 drm_atomic_get_existing_plane_state(struct drm_atomic_state *state,
568 struct drm_plane *plane)
570 return state->planes[drm_plane_index(plane)].state;
574 * drm_atomic_get_old_plane_state - get plane state, if it exists
575 * @state: global atomic state object
576 * @plane: plane to grab
578 * This function returns the old plane state for the given plane, or
579 * NULL if the plane is not part of the global atomic state.
581 static inline struct drm_plane_state *
582 drm_atomic_get_old_plane_state(struct drm_atomic_state *state,
583 struct drm_plane *plane)
585 return state->planes[drm_plane_index(plane)].old_state;
589 * drm_atomic_get_new_plane_state - get plane state, if it exists
590 * @state: global atomic state object
591 * @plane: plane to grab
593 * This function returns the new plane state for the given plane, or
594 * NULL if the plane is not part of the global atomic state.
596 static inline struct drm_plane_state *
597 drm_atomic_get_new_plane_state(struct drm_atomic_state *state,
598 struct drm_plane *plane)
600 return state->planes[drm_plane_index(plane)].new_state;
604 * drm_atomic_get_existing_connector_state - get connector state, if it exists
605 * @state: global atomic state object
606 * @connector: connector to grab
608 * This function returns the connector state for the given connector,
609 * or NULL if the connector is not part of the global atomic state.
611 * This function is deprecated, @drm_atomic_get_old_connector_state or
612 * @drm_atomic_get_new_connector_state should be used instead.
614 static inline struct drm_connector_state *
615 drm_atomic_get_existing_connector_state(struct drm_atomic_state *state,
616 struct drm_connector *connector)
618 int index = drm_connector_index(connector);
620 if (index >= state->num_connector)
623 return state->connectors[index].state;
627 * drm_atomic_get_old_connector_state - get connector state, if it exists
628 * @state: global atomic state object
629 * @connector: connector to grab
631 * This function returns the old connector state for the given connector,
632 * or NULL if the connector is not part of the global atomic state.
634 static inline struct drm_connector_state *
635 drm_atomic_get_old_connector_state(struct drm_atomic_state *state,
636 struct drm_connector *connector)
638 int index = drm_connector_index(connector);
640 if (index >= state->num_connector)
643 return state->connectors[index].old_state;
647 * drm_atomic_get_new_connector_state - get connector state, if it exists
648 * @state: global atomic state object
649 * @connector: connector to grab
651 * This function returns the new connector state for the given connector,
652 * or NULL if the connector is not part of the global atomic state.
654 static inline struct drm_connector_state *
655 drm_atomic_get_new_connector_state(struct drm_atomic_state *state,
656 struct drm_connector *connector)
658 int index = drm_connector_index(connector);
660 if (index >= state->num_connector)
663 return state->connectors[index].new_state;
667 * __drm_atomic_get_current_plane_state - get current plane state
668 * @state: global atomic state object
669 * @plane: plane to grab
671 * This function returns the plane state for the given plane, either from
672 * @state, or if the plane isn't part of the atomic state update, from @plane.
673 * This is useful in atomic check callbacks, when drivers need to peek at, but
674 * not change, state of other planes, since it avoids threading an error code
675 * back up the call chain.
679 * Note that this function is in general unsafe since it doesn't check for the
680 * required locking for access state structures. Drivers must ensure that it is
681 * safe to access the returned state structure through other means. One common
682 * example is when planes are fixed to a single CRTC, and the driver knows that
683 * the CRTC lock is held already. In that case holding the CRTC lock gives a
684 * read-lock on all planes connected to that CRTC. But if planes can be
685 * reassigned things get more tricky. In that case it's better to use
686 * drm_atomic_get_plane_state and wire up full error handling.
690 * Read-only pointer to the current plane state.
692 static inline const struct drm_plane_state *
693 __drm_atomic_get_current_plane_state(struct drm_atomic_state *state,
694 struct drm_plane *plane)
696 if (state->planes[drm_plane_index(plane)].state)
697 return state->planes[drm_plane_index(plane)].state;
703 drm_atomic_add_encoder_bridges(struct drm_atomic_state *state,
704 struct drm_encoder *encoder);
706 drm_atomic_add_affected_connectors(struct drm_atomic_state *state,
707 struct drm_crtc *crtc);
709 drm_atomic_add_affected_planes(struct drm_atomic_state *state,
710 struct drm_crtc *crtc);
712 int __must_check drm_atomic_check_only(struct drm_atomic_state *state);
713 int __must_check drm_atomic_commit(struct drm_atomic_state *state);
714 int __must_check drm_atomic_nonblocking_commit(struct drm_atomic_state *state);
716 void drm_state_dump(struct drm_device *dev, struct drm_printer *p);
719 * for_each_oldnew_connector_in_state - iterate over all connectors in an atomic update
720 * @__state: &struct drm_atomic_state pointer
721 * @connector: &struct drm_connector iteration cursor
722 * @old_connector_state: &struct drm_connector_state iteration cursor for the
724 * @new_connector_state: &struct drm_connector_state iteration cursor for the
726 * @__i: int iteration cursor, for macro-internal use
728 * This iterates over all connectors in an atomic update, tracking both old and
729 * new state. This is useful in places where the state delta needs to be
730 * considered, for example in atomic check functions.
732 #define for_each_oldnew_connector_in_state(__state, connector, old_connector_state, new_connector_state, __i) \
734 (__i) < (__state)->num_connector; \
736 for_each_if ((__state)->connectors[__i].ptr && \
737 ((connector) = (__state)->connectors[__i].ptr, \
738 (void)(connector) /* Only to avoid unused-but-set-variable warning */, \
739 (old_connector_state) = (__state)->connectors[__i].old_state, \
740 (new_connector_state) = (__state)->connectors[__i].new_state, 1))
743 * for_each_old_connector_in_state - iterate over all connectors in an atomic update
744 * @__state: &struct drm_atomic_state pointer
745 * @connector: &struct drm_connector iteration cursor
746 * @old_connector_state: &struct drm_connector_state iteration cursor for the
748 * @__i: int iteration cursor, for macro-internal use
750 * This iterates over all connectors in an atomic update, tracking only the old
751 * state. This is useful in disable functions, where we need the old state the
752 * hardware is still in.
754 #define for_each_old_connector_in_state(__state, connector, old_connector_state, __i) \
756 (__i) < (__state)->num_connector; \
758 for_each_if ((__state)->connectors[__i].ptr && \
759 ((connector) = (__state)->connectors[__i].ptr, \
760 (void)(connector) /* Only to avoid unused-but-set-variable warning */, \
761 (old_connector_state) = (__state)->connectors[__i].old_state, 1))
764 * for_each_new_connector_in_state - iterate over all connectors in an atomic update
765 * @__state: &struct drm_atomic_state pointer
766 * @connector: &struct drm_connector iteration cursor
767 * @new_connector_state: &struct drm_connector_state iteration cursor for the
769 * @__i: int iteration cursor, for macro-internal use
771 * This iterates over all connectors 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_connector_in_state(__state, connector, new_connector_state, __i) \
777 (__i) < (__state)->num_connector; \
779 for_each_if ((__state)->connectors[__i].ptr && \
780 ((connector) = (__state)->connectors[__i].ptr, \
781 (void)(connector) /* Only to avoid unused-but-set-variable warning */, \
782 (new_connector_state) = (__state)->connectors[__i].new_state, \
783 (void)(new_connector_state) /* Only to avoid unused-but-set-variable warning */, 1))
786 * for_each_oldnew_crtc_in_state - iterate over all CRTCs in an atomic update
787 * @__state: &struct drm_atomic_state pointer
788 * @crtc: &struct drm_crtc iteration cursor
789 * @old_crtc_state: &struct drm_crtc_state iteration cursor for the old state
790 * @new_crtc_state: &struct drm_crtc_state iteration cursor for the new state
791 * @__i: int iteration cursor, for macro-internal use
793 * This iterates over all CRTCs in an atomic update, tracking both old and
794 * new state. This is useful in places where the state delta needs to be
795 * considered, for example in atomic check functions.
797 #define for_each_oldnew_crtc_in_state(__state, crtc, old_crtc_state, new_crtc_state, __i) \
799 (__i) < (__state)->dev->mode_config.num_crtc; \
801 for_each_if ((__state)->crtcs[__i].ptr && \
802 ((crtc) = (__state)->crtcs[__i].ptr, \
803 (void)(crtc) /* Only to avoid unused-but-set-variable warning */, \
804 (old_crtc_state) = (__state)->crtcs[__i].old_state, \
805 (void)(old_crtc_state) /* Only to avoid unused-but-set-variable warning */, \
806 (new_crtc_state) = (__state)->crtcs[__i].new_state, \
807 (void)(new_crtc_state) /* Only to avoid unused-but-set-variable warning */, 1))
810 * for_each_old_crtc_in_state - iterate over all CRTCs in an atomic update
811 * @__state: &struct drm_atomic_state pointer
812 * @crtc: &struct drm_crtc iteration cursor
813 * @old_crtc_state: &struct drm_crtc_state iteration cursor for the old state
814 * @__i: int iteration cursor, for macro-internal use
816 * This iterates over all CRTCs in an atomic update, tracking only the old
817 * state. This is useful in disable functions, where we need the old state the
818 * hardware is still in.
820 #define for_each_old_crtc_in_state(__state, crtc, old_crtc_state, __i) \
822 (__i) < (__state)->dev->mode_config.num_crtc; \
824 for_each_if ((__state)->crtcs[__i].ptr && \
825 ((crtc) = (__state)->crtcs[__i].ptr, \
826 (void)(crtc) /* Only to avoid unused-but-set-variable warning */, \
827 (old_crtc_state) = (__state)->crtcs[__i].old_state, 1))
830 * for_each_new_crtc_in_state - iterate over all CRTCs in an atomic update
831 * @__state: &struct drm_atomic_state pointer
832 * @crtc: &struct drm_crtc iteration cursor
833 * @new_crtc_state: &struct drm_crtc_state iteration cursor for the new state
834 * @__i: int iteration cursor, for macro-internal use
836 * This iterates over all CRTCs in an atomic update, tracking only the new
837 * state. This is useful in enable functions, where we need the new state the
838 * hardware should be in when the atomic commit operation has completed.
840 #define for_each_new_crtc_in_state(__state, crtc, new_crtc_state, __i) \
842 (__i) < (__state)->dev->mode_config.num_crtc; \
844 for_each_if ((__state)->crtcs[__i].ptr && \
845 ((crtc) = (__state)->crtcs[__i].ptr, \
846 (void)(crtc) /* Only to avoid unused-but-set-variable warning */, \
847 (new_crtc_state) = (__state)->crtcs[__i].new_state, \
848 (void)(new_crtc_state) /* Only to avoid unused-but-set-variable warning */, 1))
851 * for_each_oldnew_plane_in_state - iterate over all planes in an atomic update
852 * @__state: &struct drm_atomic_state pointer
853 * @plane: &struct drm_plane iteration cursor
854 * @old_plane_state: &struct drm_plane_state iteration cursor for the old state
855 * @new_plane_state: &struct drm_plane_state iteration cursor for the new state
856 * @__i: int iteration cursor, for macro-internal use
858 * This iterates over all planes in an atomic update, tracking both old and
859 * new state. This is useful in places where the state delta needs to be
860 * considered, for example in atomic check functions.
862 #define for_each_oldnew_plane_in_state(__state, plane, old_plane_state, new_plane_state, __i) \
864 (__i) < (__state)->dev->mode_config.num_total_plane; \
866 for_each_if ((__state)->planes[__i].ptr && \
867 ((plane) = (__state)->planes[__i].ptr, \
868 (void)(plane) /* Only to avoid unused-but-set-variable warning */, \
869 (old_plane_state) = (__state)->planes[__i].old_state,\
870 (new_plane_state) = (__state)->planes[__i].new_state, 1))
873 * for_each_oldnew_plane_in_state_reverse - iterate over all planes in an atomic
874 * update in reverse order
875 * @__state: &struct drm_atomic_state pointer
876 * @plane: &struct drm_plane iteration cursor
877 * @old_plane_state: &struct drm_plane_state iteration cursor for the old state
878 * @new_plane_state: &struct drm_plane_state iteration cursor for the new state
879 * @__i: int iteration cursor, for macro-internal use
881 * This iterates over all planes in an atomic update in reverse order,
882 * tracking both old and new state. This is useful in places where the
883 * state delta needs to be considered, for example in atomic check functions.
885 #define for_each_oldnew_plane_in_state_reverse(__state, plane, old_plane_state, new_plane_state, __i) \
886 for ((__i) = ((__state)->dev->mode_config.num_total_plane - 1); \
889 for_each_if ((__state)->planes[__i].ptr && \
890 ((plane) = (__state)->planes[__i].ptr, \
891 (old_plane_state) = (__state)->planes[__i].old_state,\
892 (new_plane_state) = (__state)->planes[__i].new_state, 1))
895 * for_each_old_plane_in_state - iterate over all planes in an atomic update
896 * @__state: &struct drm_atomic_state pointer
897 * @plane: &struct drm_plane iteration cursor
898 * @old_plane_state: &struct drm_plane_state iteration cursor for the old state
899 * @__i: int iteration cursor, for macro-internal use
901 * This iterates over all planes in an atomic update, tracking only the old
902 * state. This is useful in disable functions, where we need the old state the
903 * hardware is still in.
905 #define for_each_old_plane_in_state(__state, plane, old_plane_state, __i) \
907 (__i) < (__state)->dev->mode_config.num_total_plane; \
909 for_each_if ((__state)->planes[__i].ptr && \
910 ((plane) = (__state)->planes[__i].ptr, \
911 (old_plane_state) = (__state)->planes[__i].old_state, 1))
913 * for_each_new_plane_in_state - iterate over all planes in an atomic update
914 * @__state: &struct drm_atomic_state pointer
915 * @plane: &struct drm_plane iteration cursor
916 * @new_plane_state: &struct drm_plane_state iteration cursor for the new state
917 * @__i: int iteration cursor, for macro-internal use
919 * This iterates over all planes in an atomic update, tracking only the new
920 * state. This is useful in enable functions, where we need the new state the
921 * hardware should be in when the atomic commit operation has completed.
923 #define for_each_new_plane_in_state(__state, plane, new_plane_state, __i) \
925 (__i) < (__state)->dev->mode_config.num_total_plane; \
927 for_each_if ((__state)->planes[__i].ptr && \
928 ((plane) = (__state)->planes[__i].ptr, \
929 (void)(plane) /* Only to avoid unused-but-set-variable warning */, \
930 (new_plane_state) = (__state)->planes[__i].new_state, \
931 (void)(new_plane_state) /* Only to avoid unused-but-set-variable warning */, 1))
934 * for_each_oldnew_private_obj_in_state - iterate over all private objects in an atomic update
935 * @__state: &struct drm_atomic_state pointer
936 * @obj: &struct drm_private_obj iteration cursor
937 * @old_obj_state: &struct drm_private_state iteration cursor for the old state
938 * @new_obj_state: &struct drm_private_state iteration cursor for the new state
939 * @__i: int iteration cursor, for macro-internal use
941 * This iterates over all private objects in an atomic update, tracking both
942 * old and new state. This is useful in places where the state delta needs
943 * to be considered, for example in atomic check functions.
945 #define for_each_oldnew_private_obj_in_state(__state, obj, old_obj_state, new_obj_state, __i) \
947 (__i) < (__state)->num_private_objs && \
948 ((obj) = (__state)->private_objs[__i].ptr, \
949 (old_obj_state) = (__state)->private_objs[__i].old_state, \
950 (new_obj_state) = (__state)->private_objs[__i].new_state, 1); \
954 * for_each_old_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 * @__i: int iteration cursor, for macro-internal use
960 * This iterates over all private objects in an atomic update, tracking only
961 * the old state. This is useful in disable functions, where we need the old
962 * state the hardware is still in.
964 #define for_each_old_private_obj_in_state(__state, obj, old_obj_state, __i) \
966 (__i) < (__state)->num_private_objs && \
967 ((obj) = (__state)->private_objs[__i].ptr, \
968 (old_obj_state) = (__state)->private_objs[__i].old_state, 1); \
972 * for_each_new_private_obj_in_state - iterate over all private objects in an atomic update
973 * @__state: &struct drm_atomic_state pointer
974 * @obj: &struct drm_private_obj iteration cursor
975 * @new_obj_state: &struct drm_private_state iteration cursor for the new state
976 * @__i: int iteration cursor, for macro-internal use
978 * This iterates over all private objects in an atomic update, tracking only
979 * the new state. This is useful in enable functions, where we need the new state the
980 * hardware should be in when the atomic commit operation has completed.
982 #define for_each_new_private_obj_in_state(__state, obj, new_obj_state, __i) \
984 (__i) < (__state)->num_private_objs && \
985 ((obj) = (__state)->private_objs[__i].ptr, \
986 (new_obj_state) = (__state)->private_objs[__i].new_state, 1); \
990 * drm_atomic_crtc_needs_modeset - compute combined modeset need
991 * @state: &drm_crtc_state for the CRTC
993 * To give drivers flexibility &struct drm_crtc_state has 3 booleans to track
994 * whether the state CRTC changed enough to need a full modeset cycle:
995 * mode_changed, active_changed and connectors_changed. This helper simply
996 * combines these three to compute the overall need for a modeset for @state.
998 * The atomic helper code sets these booleans, but drivers can and should
999 * change them appropriately to accurately represent whether a modeset is
1000 * really needed. In general, drivers should avoid full modesets whenever
1003 * For example if the CRTC mode has changed, and the hardware is able to enact
1004 * the requested mode change without going through a full modeset, the driver
1005 * should clear mode_changed in its &drm_mode_config_funcs.atomic_check
1009 drm_atomic_crtc_needs_modeset(const struct drm_crtc_state *state)
1011 return state->mode_changed || state->active_changed ||
1012 state->connectors_changed;
1016 * drm_atomic_crtc_effectively_active - compute whether CRTC is actually active
1017 * @state: &drm_crtc_state for the CRTC
1019 * When in self refresh mode, the crtc_state->active value will be false, since
1020 * the CRTC is off. However in some cases we're interested in whether the CRTC
1021 * is active, or effectively active (ie: it's connected to an active display).
1022 * In these cases, use this function instead of just checking active.
1025 drm_atomic_crtc_effectively_active(const struct drm_crtc_state *state)
1027 return state->active || state->self_refresh_active;
1031 * struct drm_bus_cfg - bus configuration
1033 * This structure stores the configuration of a physical bus between two
1034 * components in an output pipeline, usually between two bridges, an encoder
1035 * and a bridge, or a bridge and a connector.
1037 * The bus configuration is stored in &drm_bridge_state separately for the
1038 * input and output buses, as seen from the point of view of each bridge. The
1039 * bus configuration of a bridge output is usually identical to the
1040 * configuration of the next bridge's input, but may differ if the signals are
1041 * modified between the two bridges, for instance by an inverter on the board.
1042 * The input and output configurations of a bridge may differ if the bridge
1043 * modifies the signals internally, for instance by performing format
1044 * conversion, or modifying signals polarities.
1046 struct drm_bus_cfg {
1048 * @format: format used on this bus (one of the MEDIA_BUS_FMT_* format)
1050 * This field should not be directly modified by drivers
1051 * (drm_atomic_bridge_chain_select_bus_fmts() takes care of the bus
1052 * format negotiation).
1057 * @flags: DRM_BUS_* flags used on this bus
1063 * struct drm_bridge_state - Atomic bridge state object
1065 struct drm_bridge_state {
1067 * @base: inherit from &drm_private_state
1069 struct drm_private_state base;
1072 * @bridge: the bridge this state refers to
1074 struct drm_bridge *bridge;
1077 * @input_bus_cfg: input bus configuration
1079 struct drm_bus_cfg input_bus_cfg;
1082 * @output_bus_cfg: input bus configuration
1084 struct drm_bus_cfg output_bus_cfg;
1087 static inline struct drm_bridge_state *
1088 drm_priv_to_bridge_state(struct drm_private_state *priv)
1090 return container_of(priv, struct drm_bridge_state, base);
1093 struct drm_bridge_state *
1094 drm_atomic_get_bridge_state(struct drm_atomic_state *state,
1095 struct drm_bridge *bridge);
1096 struct drm_bridge_state *
1097 drm_atomic_get_old_bridge_state(struct drm_atomic_state *state,
1098 struct drm_bridge *bridge);
1099 struct drm_bridge_state *
1100 drm_atomic_get_new_bridge_state(struct drm_atomic_state *state,
1101 struct drm_bridge *bridge);
1103 #endif /* DRM_ATOMIC_H_ */