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;
157 s32 __user *out_fence_ptr;
158 u64 last_vblank_count;
161 struct __drm_connnectors_state {
162 struct drm_connector *ptr;
163 struct drm_connector_state *state, *old_state, *new_state;
167 * User-provided pointer which the kernel uses to return a sync_file
168 * file descriptor. Used by writeback connectors to signal completion of
171 s32 __user *out_fence_ptr;
174 struct drm_private_obj;
175 struct drm_private_state;
178 * struct drm_private_state_funcs - atomic state functions for private objects
180 * These hooks are used by atomic helpers to create, swap and destroy states of
181 * private objects. The structure itself is used as a vtable to identify the
182 * associated private object type. Each private object type that needs to be
183 * added to the atomic states is expected to have an implementation of these
184 * hooks and pass a pointer to it's drm_private_state_funcs struct to
185 * drm_atomic_get_private_obj_state().
187 struct drm_private_state_funcs {
189 * @atomic_duplicate_state:
191 * Duplicate the current state of the private object and return it. It
192 * is an error to call this before obj->state has been initialized.
196 * Duplicated atomic state or NULL when obj->state is not
197 * initialized or allocation failed.
199 struct drm_private_state *(*atomic_duplicate_state)(struct drm_private_obj *obj);
202 * @atomic_destroy_state:
204 * Frees the private object state created with @atomic_duplicate_state.
206 void (*atomic_destroy_state)(struct drm_private_obj *obj,
207 struct drm_private_state *state);
211 * struct drm_private_obj - base struct for driver private atomic object
213 * A driver private object is initialized by calling
214 * drm_atomic_private_obj_init() and cleaned up by calling
215 * drm_atomic_private_obj_fini().
217 * Currently only tracks the state update functions and the opaque driver
218 * private state itself, but in the future might also track which
219 * &drm_modeset_lock is required to duplicate and update this object's state.
221 struct drm_private_obj {
223 * @state: Current atomic state for this driver private object.
225 struct drm_private_state *state;
230 * Functions to manipulate the state of this driver private object, see
231 * &drm_private_state_funcs.
233 const struct drm_private_state_funcs *funcs;
237 * struct drm_private_state - base struct for driver private object state
238 * @state: backpointer to global drm_atomic_state
240 * Currently only contains a backpointer to the overall atomic update, but in
241 * the future also might hold synchronization information similar to e.g.
244 struct drm_private_state {
245 struct drm_atomic_state *state;
248 struct __drm_private_objs_state {
249 struct drm_private_obj *ptr;
250 struct drm_private_state *state, *old_state, *new_state;
254 * struct drm_atomic_state - the global state object for atomic updates
255 * @ref: count of all references to this state (will not be freed until zero)
256 * @dev: parent DRM device
257 * @allow_modeset: allow full modeset
258 * @legacy_cursor_update: hint to enforce legacy cursor IOCTL semantics
259 * @async_update: hint for asynchronous plane update
260 * @planes: pointer to array of structures with per-plane data
261 * @crtcs: pointer to array of CRTC pointers
262 * @num_connector: size of the @connectors and @connector_states arrays
263 * @connectors: pointer to array of structures with per-connector data
264 * @num_private_objs: size of the @private_objs array
265 * @private_objs: pointer to array of private object pointers
266 * @acquire_ctx: acquire context for this atomic modeset state update
268 * States are added to an atomic update by calling drm_atomic_get_crtc_state(),
269 * drm_atomic_get_plane_state(), drm_atomic_get_connector_state(), or for
270 * private state structures, drm_atomic_get_private_obj_state().
272 struct drm_atomic_state {
275 struct drm_device *dev;
276 bool allow_modeset : 1;
277 bool legacy_cursor_update : 1;
278 bool async_update : 1;
279 struct __drm_planes_state *planes;
280 struct __drm_crtcs_state *crtcs;
282 struct __drm_connnectors_state *connectors;
283 int num_private_objs;
284 struct __drm_private_objs_state *private_objs;
286 struct drm_modeset_acquire_ctx *acquire_ctx;
291 * Used for signaling unbound planes/connectors.
292 * When a connector or plane is not bound to any CRTC, it's still important
293 * to preserve linearity to prevent the atomic states from being freed to early.
295 * This commit (if set) is not bound to any crtc, but will be completed when
296 * drm_atomic_helper_commit_hw_done() is called.
298 struct drm_crtc_commit *fake_commit;
303 * Work item which can be used by the driver or helpers to execute the
304 * commit without blocking.
306 struct work_struct commit_work;
309 void __drm_crtc_commit_free(struct kref *kref);
312 * drm_crtc_commit_get - acquire a reference to the CRTC commit
313 * @commit: CRTC commit
315 * Increases the reference of @commit.
318 * The pointer to @commit, with reference increased.
320 static inline struct drm_crtc_commit *drm_crtc_commit_get(struct drm_crtc_commit *commit)
322 kref_get(&commit->ref);
327 * drm_crtc_commit_put - release a reference to the CRTC commmit
328 * @commit: CRTC commit
330 * This releases a reference to @commit which is freed after removing the
331 * final reference. No locking required and callable from any context.
333 static inline void drm_crtc_commit_put(struct drm_crtc_commit *commit)
335 kref_put(&commit->ref, __drm_crtc_commit_free);
338 struct drm_atomic_state * __must_check
339 drm_atomic_state_alloc(struct drm_device *dev);
340 void drm_atomic_state_clear(struct drm_atomic_state *state);
343 * drm_atomic_state_get - acquire a reference to the atomic state
344 * @state: The atomic state
346 * Returns a new reference to the @state
348 static inline struct drm_atomic_state *
349 drm_atomic_state_get(struct drm_atomic_state *state)
351 kref_get(&state->ref);
355 void __drm_atomic_state_free(struct kref *ref);
358 * drm_atomic_state_put - release a reference to the atomic state
359 * @state: The atomic state
361 * This releases a reference to @state which is freed after removing the
362 * final reference. No locking required and callable from any context.
364 static inline void drm_atomic_state_put(struct drm_atomic_state *state)
366 kref_put(&state->ref, __drm_atomic_state_free);
370 drm_atomic_state_init(struct drm_device *dev, struct drm_atomic_state *state);
371 void drm_atomic_state_default_clear(struct drm_atomic_state *state);
372 void drm_atomic_state_default_release(struct drm_atomic_state *state);
374 struct drm_crtc_state * __must_check
375 drm_atomic_get_crtc_state(struct drm_atomic_state *state,
376 struct drm_crtc *crtc);
377 int drm_atomic_crtc_set_property(struct drm_crtc *crtc,
378 struct drm_crtc_state *state, struct drm_property *property,
380 struct drm_plane_state * __must_check
381 drm_atomic_get_plane_state(struct drm_atomic_state *state,
382 struct drm_plane *plane);
383 struct drm_connector_state * __must_check
384 drm_atomic_get_connector_state(struct drm_atomic_state *state,
385 struct drm_connector *connector);
387 void drm_atomic_private_obj_init(struct drm_private_obj *obj,
388 struct drm_private_state *state,
389 const struct drm_private_state_funcs *funcs);
390 void drm_atomic_private_obj_fini(struct drm_private_obj *obj);
392 struct drm_private_state * __must_check
393 drm_atomic_get_private_obj_state(struct drm_atomic_state *state,
394 struct drm_private_obj *obj);
397 * drm_atomic_get_existing_crtc_state - get crtc state, if it exists
398 * @state: global atomic state object
399 * @crtc: crtc to grab
401 * This function returns the crtc state for the given crtc, or NULL
402 * if the crtc is not part of the global atomic state.
404 * This function is deprecated, @drm_atomic_get_old_crtc_state or
405 * @drm_atomic_get_new_crtc_state should be used instead.
407 static inline struct drm_crtc_state *
408 drm_atomic_get_existing_crtc_state(struct drm_atomic_state *state,
409 struct drm_crtc *crtc)
411 return state->crtcs[drm_crtc_index(crtc)].state;
415 * drm_atomic_get_old_crtc_state - get old crtc state, if it exists
416 * @state: global atomic state object
417 * @crtc: crtc to grab
419 * This function returns the old crtc state for the given crtc, or
420 * NULL if the crtc is not part of the global atomic state.
422 static inline struct drm_crtc_state *
423 drm_atomic_get_old_crtc_state(struct drm_atomic_state *state,
424 struct drm_crtc *crtc)
426 return state->crtcs[drm_crtc_index(crtc)].old_state;
429 * drm_atomic_get_new_crtc_state - get new crtc state, if it exists
430 * @state: global atomic state object
431 * @crtc: crtc to grab
433 * This function returns the new crtc state for the given crtc, or
434 * NULL if the crtc is not part of the global atomic state.
436 static inline struct drm_crtc_state *
437 drm_atomic_get_new_crtc_state(struct drm_atomic_state *state,
438 struct drm_crtc *crtc)
440 return state->crtcs[drm_crtc_index(crtc)].new_state;
444 * drm_atomic_get_existing_plane_state - get plane state, if it exists
445 * @state: global atomic state object
446 * @plane: plane to grab
448 * This function returns the plane state for the given plane, or NULL
449 * if the plane is not part of the global atomic state.
451 * This function is deprecated, @drm_atomic_get_old_plane_state or
452 * @drm_atomic_get_new_plane_state should be used instead.
454 static inline struct drm_plane_state *
455 drm_atomic_get_existing_plane_state(struct drm_atomic_state *state,
456 struct drm_plane *plane)
458 return state->planes[drm_plane_index(plane)].state;
462 * drm_atomic_get_old_plane_state - get plane state, if it exists
463 * @state: global atomic state object
464 * @plane: plane to grab
466 * This function returns the old plane state for the given plane, or
467 * NULL if the plane is not part of the global atomic state.
469 static inline struct drm_plane_state *
470 drm_atomic_get_old_plane_state(struct drm_atomic_state *state,
471 struct drm_plane *plane)
473 return state->planes[drm_plane_index(plane)].old_state;
477 * drm_atomic_get_new_plane_state - get plane state, if it exists
478 * @state: global atomic state object
479 * @plane: plane to grab
481 * This function returns the new plane state for the given plane, or
482 * NULL if the plane is not part of the global atomic state.
484 static inline struct drm_plane_state *
485 drm_atomic_get_new_plane_state(struct drm_atomic_state *state,
486 struct drm_plane *plane)
488 return state->planes[drm_plane_index(plane)].new_state;
492 * drm_atomic_get_existing_connector_state - get connector state, if it exists
493 * @state: global atomic state object
494 * @connector: connector to grab
496 * This function returns the connector state for the given connector,
497 * or NULL if the connector is not part of the global atomic state.
499 * This function is deprecated, @drm_atomic_get_old_connector_state or
500 * @drm_atomic_get_new_connector_state should be used instead.
502 static inline struct drm_connector_state *
503 drm_atomic_get_existing_connector_state(struct drm_atomic_state *state,
504 struct drm_connector *connector)
506 int index = drm_connector_index(connector);
508 if (index >= state->num_connector)
511 return state->connectors[index].state;
515 * drm_atomic_get_old_connector_state - get connector state, if it exists
516 * @state: global atomic state object
517 * @connector: connector to grab
519 * This function returns the old connector state for the given connector,
520 * or NULL if the connector is not part of the global atomic state.
522 static inline struct drm_connector_state *
523 drm_atomic_get_old_connector_state(struct drm_atomic_state *state,
524 struct drm_connector *connector)
526 int index = drm_connector_index(connector);
528 if (index >= state->num_connector)
531 return state->connectors[index].old_state;
535 * drm_atomic_get_new_connector_state - get connector state, if it exists
536 * @state: global atomic state object
537 * @connector: connector to grab
539 * This function returns the new connector state for the given connector,
540 * or NULL if the connector is not part of the global atomic state.
542 static inline struct drm_connector_state *
543 drm_atomic_get_new_connector_state(struct drm_atomic_state *state,
544 struct drm_connector *connector)
546 int index = drm_connector_index(connector);
548 if (index >= state->num_connector)
551 return state->connectors[index].new_state;
555 * __drm_atomic_get_current_plane_state - get current plane state
556 * @state: global atomic state object
557 * @plane: plane to grab
559 * This function returns the plane state for the given plane, either from
560 * @state, or if the plane isn't part of the atomic state update, from @plane.
561 * This is useful in atomic check callbacks, when drivers need to peek at, but
562 * not change, state of other planes, since it avoids threading an error code
563 * back up the call chain.
567 * Note that this function is in general unsafe since it doesn't check for the
568 * required locking for access state structures. Drivers must ensure that it is
569 * safe to access the returned state structure through other means. One common
570 * example is when planes are fixed to a single CRTC, and the driver knows that
571 * the CRTC lock is held already. In that case holding the CRTC lock gives a
572 * read-lock on all planes connected to that CRTC. But if planes can be
573 * reassigned things get more tricky. In that case it's better to use
574 * drm_atomic_get_plane_state and wire up full error handling.
578 * Read-only pointer to the current plane state.
580 static inline const struct drm_plane_state *
581 __drm_atomic_get_current_plane_state(struct drm_atomic_state *state,
582 struct drm_plane *plane)
584 if (state->planes[drm_plane_index(plane)].state)
585 return state->planes[drm_plane_index(plane)].state;
591 drm_atomic_set_mode_for_crtc(struct drm_crtc_state *state,
592 const struct drm_display_mode *mode);
594 drm_atomic_set_mode_prop_for_crtc(struct drm_crtc_state *state,
595 struct drm_property_blob *blob);
597 drm_atomic_set_crtc_for_plane(struct drm_plane_state *plane_state,
598 struct drm_crtc *crtc);
599 void drm_atomic_set_fb_for_plane(struct drm_plane_state *plane_state,
600 struct drm_framebuffer *fb);
601 void drm_atomic_set_fence_for_plane(struct drm_plane_state *plane_state,
602 struct dma_fence *fence);
604 drm_atomic_set_crtc_for_connector(struct drm_connector_state *conn_state,
605 struct drm_crtc *crtc);
606 int drm_atomic_set_writeback_fb_for_connector(
607 struct drm_connector_state *conn_state,
608 struct drm_framebuffer *fb);
610 drm_atomic_add_affected_connectors(struct drm_atomic_state *state,
611 struct drm_crtc *crtc);
613 drm_atomic_add_affected_planes(struct drm_atomic_state *state,
614 struct drm_crtc *crtc);
616 int __must_check drm_atomic_check_only(struct drm_atomic_state *state);
617 int __must_check drm_atomic_commit(struct drm_atomic_state *state);
618 int __must_check drm_atomic_nonblocking_commit(struct drm_atomic_state *state);
620 void drm_state_dump(struct drm_device *dev, struct drm_printer *p);
623 * for_each_oldnew_connector_in_state - iterate over all connectors in an atomic update
624 * @__state: &struct drm_atomic_state pointer
625 * @connector: &struct drm_connector iteration cursor
626 * @old_connector_state: &struct drm_connector_state iteration cursor for the
628 * @new_connector_state: &struct drm_connector_state iteration cursor for the
630 * @__i: int iteration cursor, for macro-internal use
632 * This iterates over all connectors in an atomic update, tracking both old and
633 * new state. This is useful in places where the state delta needs to be
634 * considered, for example in atomic check functions.
636 #define for_each_oldnew_connector_in_state(__state, connector, old_connector_state, new_connector_state, __i) \
638 (__i) < (__state)->num_connector; \
640 for_each_if ((__state)->connectors[__i].ptr && \
641 ((connector) = (__state)->connectors[__i].ptr, \
642 (old_connector_state) = (__state)->connectors[__i].old_state, \
643 (new_connector_state) = (__state)->connectors[__i].new_state, 1))
646 * for_each_old_connector_in_state - iterate over all connectors in an atomic update
647 * @__state: &struct drm_atomic_state pointer
648 * @connector: &struct drm_connector iteration cursor
649 * @old_connector_state: &struct drm_connector_state iteration cursor for the
651 * @__i: int iteration cursor, for macro-internal use
653 * This iterates over all connectors in an atomic update, tracking only the old
654 * state. This is useful in disable functions, where we need the old state the
655 * hardware is still in.
657 #define for_each_old_connector_in_state(__state, connector, old_connector_state, __i) \
659 (__i) < (__state)->num_connector; \
661 for_each_if ((__state)->connectors[__i].ptr && \
662 ((connector) = (__state)->connectors[__i].ptr, \
663 (old_connector_state) = (__state)->connectors[__i].old_state, 1))
666 * for_each_new_connector_in_state - iterate over all connectors in an atomic update
667 * @__state: &struct drm_atomic_state pointer
668 * @connector: &struct drm_connector iteration cursor
669 * @new_connector_state: &struct drm_connector_state iteration cursor for the
671 * @__i: int iteration cursor, for macro-internal use
673 * This iterates over all connectors in an atomic update, tracking only the new
674 * state. This is useful in enable functions, where we need the new state the
675 * hardware should be in when the atomic commit operation has completed.
677 #define for_each_new_connector_in_state(__state, connector, new_connector_state, __i) \
679 (__i) < (__state)->num_connector; \
681 for_each_if ((__state)->connectors[__i].ptr && \
682 ((connector) = (__state)->connectors[__i].ptr, \
683 (new_connector_state) = (__state)->connectors[__i].new_state, 1))
686 * for_each_oldnew_crtc_in_state - iterate over all CRTCs in an atomic update
687 * @__state: &struct drm_atomic_state pointer
688 * @crtc: &struct drm_crtc iteration cursor
689 * @old_crtc_state: &struct drm_crtc_state iteration cursor for the old state
690 * @new_crtc_state: &struct drm_crtc_state iteration cursor for the new state
691 * @__i: int iteration cursor, for macro-internal use
693 * This iterates over all CRTCs in an atomic update, tracking both old and
694 * new state. This is useful in places where the state delta needs to be
695 * considered, for example in atomic check functions.
697 #define for_each_oldnew_crtc_in_state(__state, crtc, old_crtc_state, new_crtc_state, __i) \
699 (__i) < (__state)->dev->mode_config.num_crtc; \
701 for_each_if ((__state)->crtcs[__i].ptr && \
702 ((crtc) = (__state)->crtcs[__i].ptr, \
703 (old_crtc_state) = (__state)->crtcs[__i].old_state, \
704 (new_crtc_state) = (__state)->crtcs[__i].new_state, 1))
707 * for_each_old_crtc_in_state - iterate over all CRTCs in an atomic update
708 * @__state: &struct drm_atomic_state pointer
709 * @crtc: &struct drm_crtc iteration cursor
710 * @old_crtc_state: &struct drm_crtc_state iteration cursor for the old state
711 * @__i: int iteration cursor, for macro-internal use
713 * This iterates over all CRTCs in an atomic update, tracking only the old
714 * state. This is useful in disable functions, where we need the old state the
715 * hardware is still in.
717 #define for_each_old_crtc_in_state(__state, crtc, old_crtc_state, __i) \
719 (__i) < (__state)->dev->mode_config.num_crtc; \
721 for_each_if ((__state)->crtcs[__i].ptr && \
722 ((crtc) = (__state)->crtcs[__i].ptr, \
723 (old_crtc_state) = (__state)->crtcs[__i].old_state, 1))
726 * for_each_new_crtc_in_state - iterate over all CRTCs in an atomic update
727 * @__state: &struct drm_atomic_state pointer
728 * @crtc: &struct drm_crtc iteration cursor
729 * @new_crtc_state: &struct drm_crtc_state iteration cursor for the new state
730 * @__i: int iteration cursor, for macro-internal use
732 * This iterates over all CRTCs in an atomic update, tracking only the new
733 * state. This is useful in enable functions, where we need the new state the
734 * hardware should be in when the atomic commit operation has completed.
736 #define for_each_new_crtc_in_state(__state, crtc, new_crtc_state, __i) \
738 (__i) < (__state)->dev->mode_config.num_crtc; \
740 for_each_if ((__state)->crtcs[__i].ptr && \
741 ((crtc) = (__state)->crtcs[__i].ptr, \
742 (new_crtc_state) = (__state)->crtcs[__i].new_state, 1))
745 * for_each_oldnew_plane_in_state - iterate over all planes in an atomic update
746 * @__state: &struct drm_atomic_state pointer
747 * @plane: &struct drm_plane iteration cursor
748 * @old_plane_state: &struct drm_plane_state iteration cursor for the old state
749 * @new_plane_state: &struct drm_plane_state iteration cursor for the new state
750 * @__i: int iteration cursor, for macro-internal use
752 * This iterates over all planes in an atomic update, tracking both old and
753 * new state. This is useful in places where the state delta needs to be
754 * considered, for example in atomic check functions.
756 #define for_each_oldnew_plane_in_state(__state, plane, old_plane_state, new_plane_state, __i) \
758 (__i) < (__state)->dev->mode_config.num_total_plane; \
760 for_each_if ((__state)->planes[__i].ptr && \
761 ((plane) = (__state)->planes[__i].ptr, \
762 (old_plane_state) = (__state)->planes[__i].old_state,\
763 (new_plane_state) = (__state)->planes[__i].new_state, 1))
766 * for_each_oldnew_plane_in_state_reverse - iterate over all planes in an atomic
767 * update in reverse order
768 * @__state: &struct drm_atomic_state pointer
769 * @plane: &struct drm_plane iteration cursor
770 * @old_plane_state: &struct drm_plane_state iteration cursor for the old state
771 * @new_plane_state: &struct drm_plane_state iteration cursor for the new state
772 * @__i: int iteration cursor, for macro-internal use
774 * This iterates over all planes in an atomic update in reverse order,
775 * tracking both old and new state. This is useful in places where the
776 * state delta needs to be considered, for example in atomic check functions.
778 #define for_each_oldnew_plane_in_state_reverse(__state, plane, old_plane_state, new_plane_state, __i) \
779 for ((__i) = ((__state)->dev->mode_config.num_total_plane - 1); \
782 for_each_if ((__state)->planes[__i].ptr && \
783 ((plane) = (__state)->planes[__i].ptr, \
784 (old_plane_state) = (__state)->planes[__i].old_state,\
785 (new_plane_state) = (__state)->planes[__i].new_state, 1))
788 * for_each_old_plane_in_state - iterate over all planes in an atomic update
789 * @__state: &struct drm_atomic_state pointer
790 * @plane: &struct drm_plane iteration cursor
791 * @old_plane_state: &struct drm_plane_state iteration cursor for the old state
792 * @__i: int iteration cursor, for macro-internal use
794 * This iterates over all planes in an atomic update, tracking only the old
795 * state. This is useful in disable functions, where we need the old state the
796 * hardware is still in.
798 #define for_each_old_plane_in_state(__state, plane, old_plane_state, __i) \
800 (__i) < (__state)->dev->mode_config.num_total_plane; \
802 for_each_if ((__state)->planes[__i].ptr && \
803 ((plane) = (__state)->planes[__i].ptr, \
804 (old_plane_state) = (__state)->planes[__i].old_state, 1))
806 * for_each_new_plane_in_state - iterate over all planes in an atomic update
807 * @__state: &struct drm_atomic_state pointer
808 * @plane: &struct drm_plane iteration cursor
809 * @new_plane_state: &struct drm_plane_state iteration cursor for the new state
810 * @__i: int iteration cursor, for macro-internal use
812 * This iterates over all planes in an atomic update, tracking only the new
813 * state. This is useful in enable functions, where we need the new state the
814 * hardware should be in when the atomic commit operation has completed.
816 #define for_each_new_plane_in_state(__state, plane, new_plane_state, __i) \
818 (__i) < (__state)->dev->mode_config.num_total_plane; \
820 for_each_if ((__state)->planes[__i].ptr && \
821 ((plane) = (__state)->planes[__i].ptr, \
822 (new_plane_state) = (__state)->planes[__i].new_state, 1))
825 * for_each_oldnew_private_obj_in_state - iterate over all private objects in an atomic update
826 * @__state: &struct drm_atomic_state pointer
827 * @obj: &struct drm_private_obj iteration cursor
828 * @old_obj_state: &struct drm_private_state iteration cursor for the old state
829 * @new_obj_state: &struct drm_private_state iteration cursor for the new state
830 * @__i: int iteration cursor, for macro-internal use
832 * This iterates over all private objects in an atomic update, tracking both
833 * old and new state. This is useful in places where the state delta needs
834 * to be considered, for example in atomic check functions.
836 #define for_each_oldnew_private_obj_in_state(__state, obj, old_obj_state, new_obj_state, __i) \
838 (__i) < (__state)->num_private_objs && \
839 ((obj) = (__state)->private_objs[__i].ptr, \
840 (old_obj_state) = (__state)->private_objs[__i].old_state, \
841 (new_obj_state) = (__state)->private_objs[__i].new_state, 1); \
845 * for_each_old_private_obj_in_state - iterate over all private objects in an atomic update
846 * @__state: &struct drm_atomic_state pointer
847 * @obj: &struct drm_private_obj iteration cursor
848 * @old_obj_state: &struct drm_private_state iteration cursor for the old state
849 * @__i: int iteration cursor, for macro-internal use
851 * This iterates over all private objects in an atomic update, tracking only
852 * the old state. This is useful in disable functions, where we need the old
853 * state the hardware is still in.
855 #define for_each_old_private_obj_in_state(__state, obj, old_obj_state, __i) \
857 (__i) < (__state)->num_private_objs && \
858 ((obj) = (__state)->private_objs[__i].ptr, \
859 (old_obj_state) = (__state)->private_objs[__i].old_state, 1); \
863 * for_each_new_private_obj_in_state - iterate over all private objects in an atomic update
864 * @__state: &struct drm_atomic_state pointer
865 * @obj: &struct drm_private_obj iteration cursor
866 * @new_obj_state: &struct drm_private_state iteration cursor for the new state
867 * @__i: int iteration cursor, for macro-internal use
869 * This iterates over all private objects in an atomic update, tracking only
870 * the new state. This is useful in enable functions, where we need the new state the
871 * hardware should be in when the atomic commit operation has completed.
873 #define for_each_new_private_obj_in_state(__state, obj, new_obj_state, __i) \
875 (__i) < (__state)->num_private_objs && \
876 ((obj) = (__state)->private_objs[__i].ptr, \
877 (new_obj_state) = (__state)->private_objs[__i].new_state, 1); \
881 * drm_atomic_crtc_needs_modeset - compute combined modeset need
882 * @state: &drm_crtc_state for the CRTC
884 * To give drivers flexibility &struct drm_crtc_state has 3 booleans to track
885 * whether the state CRTC changed enough to need a full modeset cycle:
886 * mode_changed, active_changed and connectors_changed. This helper simply
887 * combines these three to compute the overall need for a modeset for @state.
889 * The atomic helper code sets these booleans, but drivers can and should
890 * change them appropriately to accurately represent whether a modeset is
891 * really needed. In general, drivers should avoid full modesets whenever
894 * For example if the CRTC mode has changed, and the hardware is able to enact
895 * the requested mode change without going through a full modeset, the driver
896 * should clear mode_changed in its &drm_mode_config_funcs.atomic_check
900 drm_atomic_crtc_needs_modeset(const struct drm_crtc_state *state)
902 return state->mode_changed || state->active_changed ||
903 state->connectors_changed;
906 #endif /* DRM_ATOMIC_H_ */