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1/*
2 * Copyright (C) 2014 Red Hat
3 * Copyright (C) 2014 Intel Corp.
4 *
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:
11 *
12 * The above copyright notice and this permission notice shall be included in
13 * all copies or substantial portions of the Software.
14 *
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.
22 *
23 * Authors:
24 * Rob Clark <robdclark@gmail.com>
25 * Daniel Vetter <daniel.vetter@ffwll.ch>
26 */
27
28#ifndef DRM_ATOMIC_HELPER_H_
29#define DRM_ATOMIC_HELPER_H_
30
31#include <drm/drm_crtc.h>
32#include <drm/drm_modeset_helper_vtables.h>
33#include <drm/drm_modeset_helper.h>
34#include <drm/drm_atomic_state_helper.h>
35#include <drm/drm_util.h>
36
37/*
38 * Drivers that don't allow primary plane scaling may pass this macro in place
39 * of the min/max scale parameters of the plane-state checker function.
40 *
41 * Due to src being in 16.16 fixed point and dest being in integer pixels,
42 * 1<<16 represents no scaling.
43 */
44#define DRM_PLANE_NO_SCALING (1<<16)
45
46struct drm_atomic_state;
47struct drm_private_obj;
48struct drm_private_state;
49
50int drm_atomic_helper_check_modeset(struct drm_device *dev,
51 struct drm_atomic_state *state);
52int drm_atomic_helper_check_wb_connector_state(struct drm_connector *connector,
53 struct drm_atomic_state *state);
54int drm_atomic_helper_check_plane_state(struct drm_plane_state *plane_state,
55 const struct drm_crtc_state *crtc_state,
56 int min_scale,
57 int max_scale,
58 bool can_position,
59 bool can_update_disabled);
60int drm_atomic_helper_check_planes(struct drm_device *dev,
61 struct drm_atomic_state *state);
62int drm_atomic_helper_check_crtc_primary_plane(struct drm_crtc_state *crtc_state);
63int drm_atomic_helper_check(struct drm_device *dev,
64 struct drm_atomic_state *state);
65void drm_atomic_helper_commit_tail(struct drm_atomic_state *state);
66void drm_atomic_helper_commit_tail_rpm(struct drm_atomic_state *state);
67int drm_atomic_helper_commit(struct drm_device *dev,
68 struct drm_atomic_state *state,
69 bool nonblock);
70int drm_atomic_helper_async_check(struct drm_device *dev,
71 struct drm_atomic_state *state);
72void drm_atomic_helper_async_commit(struct drm_device *dev,
73 struct drm_atomic_state *state);
74
75int drm_atomic_helper_wait_for_fences(struct drm_device *dev,
76 struct drm_atomic_state *state,
77 bool pre_swap);
78
79void drm_atomic_helper_wait_for_vblanks(struct drm_device *dev,
80 struct drm_atomic_state *old_state);
81
82void drm_atomic_helper_wait_for_flip_done(struct drm_device *dev,
83 struct drm_atomic_state *old_state);
84
85void
86drm_atomic_helper_update_legacy_modeset_state(struct drm_device *dev,
87 struct drm_atomic_state *old_state);
88
89void
90drm_atomic_helper_calc_timestamping_constants(struct drm_atomic_state *state);
91
92void drm_atomic_helper_commit_modeset_disables(struct drm_device *dev,
93 struct drm_atomic_state *state);
94void drm_atomic_helper_commit_modeset_enables(struct drm_device *dev,
95 struct drm_atomic_state *old_state);
96
97int drm_atomic_helper_prepare_planes(struct drm_device *dev,
98 struct drm_atomic_state *state);
99void drm_atomic_helper_unprepare_planes(struct drm_device *dev,
100 struct drm_atomic_state *state);
101
102#define DRM_PLANE_COMMIT_ACTIVE_ONLY BIT(0)
103#define DRM_PLANE_COMMIT_NO_DISABLE_AFTER_MODESET BIT(1)
104
105void drm_atomic_helper_commit_planes(struct drm_device *dev,
106 struct drm_atomic_state *state,
107 uint32_t flags);
108void drm_atomic_helper_cleanup_planes(struct drm_device *dev,
109 struct drm_atomic_state *old_state);
110void drm_atomic_helper_commit_planes_on_crtc(struct drm_crtc_state *old_crtc_state);
111void
112drm_atomic_helper_disable_planes_on_crtc(struct drm_crtc_state *old_crtc_state,
113 bool atomic);
114
115int __must_check drm_atomic_helper_swap_state(struct drm_atomic_state *state,
116 bool stall);
117
118/* nonblocking commit helpers */
119int drm_atomic_helper_setup_commit(struct drm_atomic_state *state,
120 bool nonblock);
121void drm_atomic_helper_wait_for_dependencies(struct drm_atomic_state *state);
122void drm_atomic_helper_fake_vblank(struct drm_atomic_state *state);
123void drm_atomic_helper_commit_hw_done(struct drm_atomic_state *state);
124void drm_atomic_helper_commit_cleanup_done(struct drm_atomic_state *state);
125
126/* implementations for legacy interfaces */
127int drm_atomic_helper_update_plane(struct drm_plane *plane,
128 struct drm_crtc *crtc,
129 struct drm_framebuffer *fb,
130 int crtc_x, int crtc_y,
131 unsigned int crtc_w, unsigned int crtc_h,
132 uint32_t src_x, uint32_t src_y,
133 uint32_t src_w, uint32_t src_h,
134 struct drm_modeset_acquire_ctx *ctx);
135int drm_atomic_helper_disable_plane(struct drm_plane *plane,
136 struct drm_modeset_acquire_ctx *ctx);
137int drm_atomic_helper_set_config(struct drm_mode_set *set,
138 struct drm_modeset_acquire_ctx *ctx);
139
140int drm_atomic_helper_disable_all(struct drm_device *dev,
141 struct drm_modeset_acquire_ctx *ctx);
142void drm_atomic_helper_shutdown(struct drm_device *dev);
143struct drm_atomic_state *
144drm_atomic_helper_duplicate_state(struct drm_device *dev,
145 struct drm_modeset_acquire_ctx *ctx);
146struct drm_atomic_state *drm_atomic_helper_suspend(struct drm_device *dev);
147int drm_atomic_helper_commit_duplicated_state(struct drm_atomic_state *state,
148 struct drm_modeset_acquire_ctx *ctx);
149int drm_atomic_helper_resume(struct drm_device *dev,
150 struct drm_atomic_state *state);
151
152int drm_atomic_helper_page_flip(struct drm_crtc *crtc,
153 struct drm_framebuffer *fb,
154 struct drm_pending_vblank_event *event,
155 uint32_t flags,
156 struct drm_modeset_acquire_ctx *ctx);
157int drm_atomic_helper_page_flip_target(
158 struct drm_crtc *crtc,
159 struct drm_framebuffer *fb,
160 struct drm_pending_vblank_event *event,
161 uint32_t flags,
162 uint32_t target,
163 struct drm_modeset_acquire_ctx *ctx);
164
165/**
166 * drm_atomic_crtc_for_each_plane - iterate over planes currently attached to CRTC
167 * @plane: the loop cursor
168 * @crtc: the CRTC whose planes are iterated
169 *
170 * This iterates over the current state, useful (for example) when applying
171 * atomic state after it has been checked and swapped. To iterate over the
172 * planes which *will* be attached (more useful in code called from
173 * &drm_mode_config_funcs.atomic_check) see
174 * drm_atomic_crtc_state_for_each_plane().
175 */
176#define drm_atomic_crtc_for_each_plane(plane, crtc) \
177 drm_for_each_plane_mask(plane, (crtc)->dev, (crtc)->state->plane_mask)
178
179/**
180 * drm_atomic_crtc_state_for_each_plane - iterate over attached planes in new state
181 * @plane: the loop cursor
182 * @crtc_state: the incoming CRTC state
183 *
184 * Similar to drm_crtc_for_each_plane(), but iterates the planes that will be
185 * attached if the specified state is applied. Useful during for example
186 * in code called from &drm_mode_config_funcs.atomic_check operations, to
187 * validate the incoming state.
188 */
189#define drm_atomic_crtc_state_for_each_plane(plane, crtc_state) \
190 drm_for_each_plane_mask(plane, (crtc_state)->state->dev, (crtc_state)->plane_mask)
191
192/**
193 * drm_atomic_crtc_state_for_each_plane_state - iterate over attached planes in new state
194 * @plane: the loop cursor
195 * @plane_state: loop cursor for the plane's state, must be const
196 * @crtc_state: the incoming CRTC state
197 *
198 * Similar to drm_crtc_for_each_plane(), but iterates the planes that will be
199 * attached if the specified state is applied. Useful during for example
200 * in code called from &drm_mode_config_funcs.atomic_check operations, to
201 * validate the incoming state.
202 *
203 * Compared to just drm_atomic_crtc_state_for_each_plane() this also fills in a
204 * const plane_state. This is useful when a driver just wants to peek at other
205 * active planes on this CRTC, but does not need to change it.
206 */
207#define drm_atomic_crtc_state_for_each_plane_state(plane, plane_state, crtc_state) \
208 drm_for_each_plane_mask(plane, (crtc_state)->state->dev, (crtc_state)->plane_mask) \
209 for_each_if ((plane_state = \
210 __drm_atomic_get_current_plane_state((crtc_state)->state, \
211 plane)))
212
213/**
214 * drm_atomic_plane_enabling - check whether a plane is being enabled
215 * @old_plane_state: old atomic plane state
216 * @new_plane_state: new atomic plane state
217 *
218 * Checks the atomic state of a plane to determine whether it's being enabled
219 * or not. This also WARNs if it detects an invalid state (both CRTC and FB
220 * need to either both be NULL or both be non-NULL).
221 *
222 * RETURNS:
223 * True if the plane is being enabled, false otherwise.
224 */
225static inline bool drm_atomic_plane_enabling(struct drm_plane_state *old_plane_state,
226 struct drm_plane_state *new_plane_state)
227{
228 /*
229 * When enabling a plane, CRTC and FB should always be set together.
230 * Anything else should be considered a bug in the atomic core, so we
231 * gently warn about it.
232 */
233 WARN_ON((!new_plane_state->crtc && new_plane_state->fb) ||
234 (new_plane_state->crtc && !new_plane_state->fb));
235
236 return !old_plane_state->crtc && new_plane_state->crtc;
237}
238
239/**
240 * drm_atomic_plane_disabling - check whether a plane is being disabled
241 * @old_plane_state: old atomic plane state
242 * @new_plane_state: new atomic plane state
243 *
244 * Checks the atomic state of a plane to determine whether it's being disabled
245 * or not. This also WARNs if it detects an invalid state (both CRTC and FB
246 * need to either both be NULL or both be non-NULL).
247 *
248 * RETURNS:
249 * True if the plane is being disabled, false otherwise.
250 */
251static inline bool
252drm_atomic_plane_disabling(struct drm_plane_state *old_plane_state,
253 struct drm_plane_state *new_plane_state)
254{
255 /*
256 * When disabling a plane, CRTC and FB should always be NULL together.
257 * Anything else should be considered a bug in the atomic core, so we
258 * gently warn about it.
259 */
260 WARN_ON((new_plane_state->crtc == NULL && new_plane_state->fb != NULL) ||
261 (new_plane_state->crtc != NULL && new_plane_state->fb == NULL));
262
263 return old_plane_state->crtc && !new_plane_state->crtc;
264}
265
266u32 *
267drm_atomic_helper_bridge_propagate_bus_fmt(struct drm_bridge *bridge,
268 struct drm_bridge_state *bridge_state,
269 struct drm_crtc_state *crtc_state,
270 struct drm_connector_state *conn_state,
271 u32 output_fmt,
272 unsigned int *num_input_fmts);
273
274#endif /* DRM_ATOMIC_HELPER_H_ */
1/*
2 * Copyright (C) 2014 Red Hat
3 * Copyright (C) 2014 Intel Corp.
4 *
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:
11 *
12 * The above copyright notice and this permission notice shall be included in
13 * all copies or substantial portions of the Software.
14 *
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.
22 *
23 * Authors:
24 * Rob Clark <robdclark@gmail.com>
25 * Daniel Vetter <daniel.vetter@ffwll.ch>
26 */
27
28#ifndef DRM_ATOMIC_HELPER_H_
29#define DRM_ATOMIC_HELPER_H_
30
31#include <drm/drm_crtc.h>
32#include <drm/drm_modeset_helper_vtables.h>
33#include <drm/drm_modeset_helper.h>
34
35struct drm_atomic_state;
36
37int drm_atomic_helper_check_modeset(struct drm_device *dev,
38 struct drm_atomic_state *state);
39int drm_atomic_helper_check_planes(struct drm_device *dev,
40 struct drm_atomic_state *state);
41int drm_atomic_helper_check(struct drm_device *dev,
42 struct drm_atomic_state *state);
43void drm_atomic_helper_commit_tail(struct drm_atomic_state *state);
44int drm_atomic_helper_commit(struct drm_device *dev,
45 struct drm_atomic_state *state,
46 bool nonblock);
47
48int drm_atomic_helper_wait_for_fences(struct drm_device *dev,
49 struct drm_atomic_state *state,
50 bool pre_swap);
51bool drm_atomic_helper_framebuffer_changed(struct drm_device *dev,
52 struct drm_atomic_state *old_state,
53 struct drm_crtc *crtc);
54
55void drm_atomic_helper_wait_for_vblanks(struct drm_device *dev,
56 struct drm_atomic_state *old_state);
57
58void
59drm_atomic_helper_update_legacy_modeset_state(struct drm_device *dev,
60 struct drm_atomic_state *old_state);
61
62void drm_atomic_helper_commit_modeset_disables(struct drm_device *dev,
63 struct drm_atomic_state *state);
64void drm_atomic_helper_commit_modeset_enables(struct drm_device *dev,
65 struct drm_atomic_state *old_state);
66
67int drm_atomic_helper_prepare_planes(struct drm_device *dev,
68 struct drm_atomic_state *state);
69
70#define DRM_PLANE_COMMIT_ACTIVE_ONLY BIT(0)
71#define DRM_PLANE_COMMIT_NO_DISABLE_AFTER_MODESET BIT(1)
72
73void drm_atomic_helper_commit_planes(struct drm_device *dev,
74 struct drm_atomic_state *state,
75 uint32_t flags);
76void drm_atomic_helper_cleanup_planes(struct drm_device *dev,
77 struct drm_atomic_state *old_state);
78void drm_atomic_helper_commit_planes_on_crtc(struct drm_crtc_state *old_crtc_state);
79void
80drm_atomic_helper_disable_planes_on_crtc(struct drm_crtc_state *old_crtc_state,
81 bool atomic);
82
83void drm_atomic_helper_swap_state(struct drm_atomic_state *state,
84 bool stall);
85
86/* nonblocking commit helpers */
87int drm_atomic_helper_setup_commit(struct drm_atomic_state *state,
88 bool nonblock);
89void drm_atomic_helper_wait_for_dependencies(struct drm_atomic_state *state);
90void drm_atomic_helper_commit_hw_done(struct drm_atomic_state *state);
91void drm_atomic_helper_commit_cleanup_done(struct drm_atomic_state *state);
92
93/* implementations for legacy interfaces */
94int drm_atomic_helper_update_plane(struct drm_plane *plane,
95 struct drm_crtc *crtc,
96 struct drm_framebuffer *fb,
97 int crtc_x, int crtc_y,
98 unsigned int crtc_w, unsigned int crtc_h,
99 uint32_t src_x, uint32_t src_y,
100 uint32_t src_w, uint32_t src_h);
101int drm_atomic_helper_disable_plane(struct drm_plane *plane);
102int __drm_atomic_helper_disable_plane(struct drm_plane *plane,
103 struct drm_plane_state *plane_state);
104int drm_atomic_helper_set_config(struct drm_mode_set *set);
105int __drm_atomic_helper_set_config(struct drm_mode_set *set,
106 struct drm_atomic_state *state);
107
108int drm_atomic_helper_disable_all(struct drm_device *dev,
109 struct drm_modeset_acquire_ctx *ctx);
110struct drm_atomic_state *drm_atomic_helper_suspend(struct drm_device *dev);
111int drm_atomic_helper_resume(struct drm_device *dev,
112 struct drm_atomic_state *state);
113
114int drm_atomic_helper_crtc_set_property(struct drm_crtc *crtc,
115 struct drm_property *property,
116 uint64_t val);
117int drm_atomic_helper_plane_set_property(struct drm_plane *plane,
118 struct drm_property *property,
119 uint64_t val);
120int drm_atomic_helper_connector_set_property(struct drm_connector *connector,
121 struct drm_property *property,
122 uint64_t val);
123int drm_atomic_helper_page_flip(struct drm_crtc *crtc,
124 struct drm_framebuffer *fb,
125 struct drm_pending_vblank_event *event,
126 uint32_t flags);
127int drm_atomic_helper_connector_dpms(struct drm_connector *connector,
128 int mode);
129struct drm_encoder *
130drm_atomic_helper_best_encoder(struct drm_connector *connector);
131
132/* default implementations for state handling */
133void drm_atomic_helper_crtc_reset(struct drm_crtc *crtc);
134void __drm_atomic_helper_crtc_duplicate_state(struct drm_crtc *crtc,
135 struct drm_crtc_state *state);
136struct drm_crtc_state *
137drm_atomic_helper_crtc_duplicate_state(struct drm_crtc *crtc);
138void __drm_atomic_helper_crtc_destroy_state(struct drm_crtc_state *state);
139void drm_atomic_helper_crtc_destroy_state(struct drm_crtc *crtc,
140 struct drm_crtc_state *state);
141
142void drm_atomic_helper_plane_reset(struct drm_plane *plane);
143void __drm_atomic_helper_plane_duplicate_state(struct drm_plane *plane,
144 struct drm_plane_state *state);
145struct drm_plane_state *
146drm_atomic_helper_plane_duplicate_state(struct drm_plane *plane);
147void __drm_atomic_helper_plane_destroy_state(struct drm_plane_state *state);
148void drm_atomic_helper_plane_destroy_state(struct drm_plane *plane,
149 struct drm_plane_state *state);
150
151void __drm_atomic_helper_connector_reset(struct drm_connector *connector,
152 struct drm_connector_state *conn_state);
153void drm_atomic_helper_connector_reset(struct drm_connector *connector);
154void
155__drm_atomic_helper_connector_duplicate_state(struct drm_connector *connector,
156 struct drm_connector_state *state);
157struct drm_connector_state *
158drm_atomic_helper_connector_duplicate_state(struct drm_connector *connector);
159struct drm_atomic_state *
160drm_atomic_helper_duplicate_state(struct drm_device *dev,
161 struct drm_modeset_acquire_ctx *ctx);
162void
163__drm_atomic_helper_connector_destroy_state(struct drm_connector_state *state);
164void drm_atomic_helper_connector_destroy_state(struct drm_connector *connector,
165 struct drm_connector_state *state);
166int drm_atomic_helper_legacy_gamma_set(struct drm_crtc *crtc,
167 u16 *red, u16 *green, u16 *blue,
168 uint32_t size);
169
170/**
171 * drm_atomic_crtc_for_each_plane - iterate over planes currently attached to CRTC
172 * @plane: the loop cursor
173 * @crtc: the crtc whose planes are iterated
174 *
175 * This iterates over the current state, useful (for example) when applying
176 * atomic state after it has been checked and swapped. To iterate over the
177 * planes which *will* be attached (for ->atomic_check()) see
178 * drm_atomic_crtc_state_for_each_plane().
179 */
180#define drm_atomic_crtc_for_each_plane(plane, crtc) \
181 drm_for_each_plane_mask(plane, (crtc)->dev, (crtc)->state->plane_mask)
182
183/**
184 * drm_crtc_atomic_state_for_each_plane - iterate over attached planes in new state
185 * @plane: the loop cursor
186 * @crtc_state: the incoming crtc-state
187 *
188 * Similar to drm_crtc_for_each_plane(), but iterates the planes that will be
189 * attached if the specified state is applied. Useful during (for example)
190 * ->atomic_check() operations, to validate the incoming state.
191 */
192#define drm_atomic_crtc_state_for_each_plane(plane, crtc_state) \
193 drm_for_each_plane_mask(plane, (crtc_state)->state->dev, (crtc_state)->plane_mask)
194
195/**
196 * drm_crtc_atomic_state_for_each_plane_state - iterate over attached planes in new state
197 * @plane: the loop cursor
198 * @plane_state: loop cursor for the plane's state, must be const
199 * @crtc_state: the incoming crtc-state
200 *
201 * Similar to drm_crtc_for_each_plane(), but iterates the planes that will be
202 * attached if the specified state is applied. Useful during (for example)
203 * ->atomic_check() operations, to validate the incoming state.
204 *
205 * Compared to just drm_atomic_crtc_state_for_each_plane() this also fills in a
206 * const plane_state. This is useful when a driver just wants to peek at other
207 * active planes on this crtc, but does not need to change it.
208 */
209#define drm_atomic_crtc_state_for_each_plane_state(plane, plane_state, crtc_state) \
210 drm_for_each_plane_mask(plane, (crtc_state)->state->dev, (crtc_state)->plane_mask) \
211 for_each_if ((plane_state = \
212 __drm_atomic_get_current_plane_state((crtc_state)->state, \
213 plane)))
214
215/*
216 * drm_atomic_plane_disabling - check whether a plane is being disabled
217 * @plane: plane object
218 * @old_state: previous atomic state
219 *
220 * Checks the atomic state of a plane to determine whether it's being disabled
221 * or not. This also WARNs if it detects an invalid state (both CRTC and FB
222 * need to either both be NULL or both be non-NULL).
223 *
224 * RETURNS:
225 * True if the plane is being disabled, false otherwise.
226 */
227static inline bool
228drm_atomic_plane_disabling(struct drm_plane *plane,
229 struct drm_plane_state *old_state)
230{
231 /*
232 * When disabling a plane, CRTC and FB should always be NULL together.
233 * Anything else should be considered a bug in the atomic core, so we
234 * gently warn about it.
235 */
236 WARN_ON((plane->state->crtc == NULL && plane->state->fb != NULL) ||
237 (plane->state->crtc != NULL && plane->state->fb == NULL));
238
239 /*
240 * When using the transitional helpers, old_state may be NULL. If so,
241 * we know nothing about the current state and have to assume that it
242 * might be enabled.
243 *
244 * When using the atomic helpers, old_state won't be NULL. Therefore
245 * this check assumes that either the driver will have reconstructed
246 * the correct state in ->reset() or that the driver will have taken
247 * appropriate measures to disable all planes.
248 */
249 return (!old_state || old_state->crtc) && !plane->state->crtc;
250}
251
252#endif /* DRM_ATOMIC_HELPER_H_ */