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6dd7b6ce TZ |
1 | // SPDX-License-Identifier: GPL-2.0-or-later |
2 | ||
820c1707 TZ |
3 | #include <linux/dma-resv.h> |
4 | ||
6dd7b6ce | 5 | #include <drm/drm_atomic_state_helper.h> |
820c1707 TZ |
6 | #include <drm/drm_atomic_uapi.h> |
7 | #include <drm/drm_gem.h> | |
6dd7b6ce TZ |
8 | #include <drm/drm_gem_atomic_helper.h> |
9 | #include <drm/drm_gem_framebuffer_helper.h> | |
10 | #include <drm/drm_simple_kms_helper.h> | |
11 | ||
12 | #include "drm_internal.h" | |
13 | ||
14 | /** | |
15 | * DOC: overview | |
16 | * | |
17 | * The GEM atomic helpers library implements generic atomic-commit | |
18 | * functions for drivers that use GEM objects. Currently, it provides | |
820c1707 TZ |
19 | * synchronization helpers, and plane state and framebuffer BO mappings |
20 | * for planes with shadow buffers. | |
21 | * | |
22 | * Before scanout, a plane's framebuffer needs to be synchronized with | |
23 | * possible writers that draw into the framebuffer. All drivers should | |
24 | * call drm_gem_plane_helper_prepare_fb() from their implementation of | |
25 | * struct &drm_plane_helper.prepare_fb . It sets the plane's fence from | |
26 | * the framebuffer so that the DRM core can synchronize access automatically. | |
27 | * | |
28 | * drm_gem_plane_helper_prepare_fb() can also be used directly as | |
29 | * implementation of prepare_fb. For drivers based on | |
30 | * struct drm_simple_display_pipe, drm_gem_simple_display_pipe_prepare_fb() | |
31 | * provides equivalent functionality. | |
32 | * | |
33 | * .. code-block:: c | |
34 | * | |
35 | * #include <drm/drm_gem_atomic_helper.h> | |
36 | * | |
37 | * struct drm_plane_helper_funcs driver_plane_helper_funcs = { | |
38 | * ..., | |
39 | * . prepare_fb = drm_gem_plane_helper_prepare_fb, | |
40 | * }; | |
41 | * | |
42 | * struct drm_simple_display_pipe_funcs driver_pipe_funcs = { | |
43 | * ..., | |
44 | * . prepare_fb = drm_gem_simple_display_pipe_prepare_fb, | |
45 | * }; | |
9dc9067d TZ |
46 | * |
47 | * A driver using a shadow buffer copies the content of the shadow buffers | |
48 | * into the HW's framebuffer memory during an atomic update. This requires | |
49 | * a mapping of the shadow buffer into kernel address space. The mappings | |
50 | * cannot be established by commit-tail functions, such as atomic_update, | |
51 | * as this would violate locking rules around dma_buf_vmap(). | |
52 | * | |
53 | * The helpers for shadow-buffered planes establish and release mappings, | |
54 | * and provide struct drm_shadow_plane_state, which stores the plane's mapping | |
55 | * for commit-tail functons. | |
56 | * | |
57 | * Shadow-buffered planes can easily be enabled by using the provided macros | |
58 | * %DRM_GEM_SHADOW_PLANE_FUNCS and %DRM_GEM_SHADOW_PLANE_HELPER_FUNCS. | |
59 | * These macros set up the plane and plane-helper callbacks to point to the | |
60 | * shadow-buffer helpers. | |
61 | * | |
62 | * .. code-block:: c | |
63 | * | |
820c1707 | 64 | * #include <drm/drm_gem_atomic_helper.h> |
9dc9067d TZ |
65 | * |
66 | * struct drm_plane_funcs driver_plane_funcs = { | |
67 | * ..., | |
68 | * DRM_GEM_SHADOW_PLANE_FUNCS, | |
69 | * }; | |
70 | * | |
71 | * struct drm_plane_helper_funcs driver_plane_helper_funcs = { | |
72 | * ..., | |
73 | * DRM_GEM_SHADOW_PLANE_HELPER_FUNCS, | |
74 | * }; | |
75 | * | |
76 | * In the driver's atomic-update function, shadow-buffer mappings are available | |
77 | * from the plane state. Use to_drm_shadow_plane_state() to upcast from | |
78 | * struct drm_plane_state. | |
79 | * | |
80 | * .. code-block:: c | |
81 | * | |
82 | * void driver_plane_atomic_update(struct drm_plane *plane, | |
83 | * struct drm_plane_state *old_plane_state) | |
84 | * { | |
85 | * struct drm_plane_state *plane_state = plane->state; | |
86 | * struct drm_shadow_plane_state *shadow_plane_state = | |
87 | * to_drm_shadow_plane_state(plane_state); | |
88 | * | |
89 | * // access shadow buffer via shadow_plane_state->map | |
90 | * } | |
91 | * | |
92 | * A mapping address for each of the framebuffer's buffer object is stored in | |
93 | * struct &drm_shadow_plane_state.map. The mappings are valid while the state | |
94 | * is being used. | |
95 | * | |
96 | * Drivers that use struct drm_simple_display_pipe can use | |
97 | * %DRM_GEM_SIMPLE_DISPLAY_PIPE_SHADOW_PLANE_FUNCS to initialize the rsp | |
98 | * callbacks. Access to shadow-buffer mappings is similar to regular | |
99 | * atomic_update. | |
100 | * | |
101 | * .. code-block:: c | |
102 | * | |
103 | * struct drm_simple_display_pipe_funcs driver_pipe_funcs = { | |
104 | * ..., | |
105 | * DRM_GEM_SIMPLE_DISPLAY_PIPE_SHADOW_PLANE_FUNCS, | |
106 | * }; | |
107 | * | |
108 | * void driver_pipe_enable(struct drm_simple_display_pipe *pipe, | |
109 | * struct drm_crtc_state *crtc_state, | |
110 | * struct drm_plane_state *plane_state) | |
111 | * { | |
112 | * struct drm_shadow_plane_state *shadow_plane_state = | |
113 | * to_drm_shadow_plane_state(plane_state); | |
114 | * | |
115 | * // access shadow buffer via shadow_plane_state->map | |
116 | * } | |
6dd7b6ce TZ |
117 | */ |
118 | ||
820c1707 TZ |
119 | /* |
120 | * Plane Helpers | |
121 | */ | |
122 | ||
123 | /** | |
124 | * drm_gem_plane_helper_prepare_fb() - Prepare a GEM backed framebuffer | |
125 | * @plane: Plane | |
126 | * @state: Plane state the fence will be attached to | |
127 | * | |
128 | * This function extracts the exclusive fence from &drm_gem_object.resv and | |
129 | * attaches it to plane state for the atomic helper to wait on. This is | |
130 | * necessary to correctly implement implicit synchronization for any buffers | |
131 | * shared as a struct &dma_buf. This function can be used as the | |
132 | * &drm_plane_helper_funcs.prepare_fb callback. | |
133 | * | |
134 | * There is no need for &drm_plane_helper_funcs.cleanup_fb hook for simple | |
135 | * GEM based framebuffer drivers which have their buffers always pinned in | |
136 | * memory. | |
137 | * | |
7d30963f DV |
138 | * This function is the default implementation for GEM drivers of |
139 | * &drm_plane_helper_funcs.prepare_fb if no callback is provided. | |
140 | * | |
820c1707 TZ |
141 | * See drm_atomic_set_fence_for_plane() for a discussion of implicit and |
142 | * explicit fencing in atomic modeset updates. | |
143 | */ | |
144 | int drm_gem_plane_helper_prepare_fb(struct drm_plane *plane, struct drm_plane_state *state) | |
145 | { | |
146 | struct drm_gem_object *obj; | |
147 | struct dma_fence *fence; | |
148 | ||
149 | if (!state->fb) | |
150 | return 0; | |
151 | ||
152 | obj = drm_gem_fb_get_obj(state->fb, 0); | |
6b41323a | 153 | fence = dma_resv_get_excl_unlocked(obj->resv); |
820c1707 TZ |
154 | drm_atomic_set_fence_for_plane(state, fence); |
155 | ||
156 | return 0; | |
157 | } | |
158 | EXPORT_SYMBOL_GPL(drm_gem_plane_helper_prepare_fb); | |
159 | ||
160 | /** | |
161 | * drm_gem_simple_display_pipe_prepare_fb - prepare_fb helper for &drm_simple_display_pipe | |
162 | * @pipe: Simple display pipe | |
163 | * @plane_state: Plane state | |
164 | * | |
165 | * This function uses drm_gem_plane_helper_prepare_fb() to extract the exclusive fence | |
166 | * from &drm_gem_object.resv and attaches it to plane state for the atomic | |
167 | * helper to wait on. This is necessary to correctly implement implicit | |
168 | * synchronization for any buffers shared as a struct &dma_buf. Drivers can use | |
169 | * this as their &drm_simple_display_pipe_funcs.prepare_fb callback. | |
170 | * | |
171 | * See drm_atomic_set_fence_for_plane() for a discussion of implicit and | |
172 | * explicit fencing in atomic modeset updates. | |
173 | */ | |
174 | int drm_gem_simple_display_pipe_prepare_fb(struct drm_simple_display_pipe *pipe, | |
175 | struct drm_plane_state *plane_state) | |
176 | { | |
177 | return drm_gem_plane_helper_prepare_fb(&pipe->plane, plane_state); | |
178 | } | |
179 | EXPORT_SYMBOL(drm_gem_simple_display_pipe_prepare_fb); | |
180 | ||
6dd7b6ce TZ |
181 | /* |
182 | * Shadow-buffered Planes | |
183 | */ | |
184 | ||
b7156502 TZ |
185 | /** |
186 | * __drm_gem_duplicate_shadow_plane_state - duplicates shadow-buffered plane state | |
187 | * @plane: the plane | |
188 | * @new_shadow_plane_state: the new shadow-buffered plane state | |
189 | * | |
190 | * This function duplicates shadow-buffered plane state. This is helpful for drivers | |
191 | * that subclass struct drm_shadow_plane_state. | |
192 | * | |
193 | * The function does not duplicate existing mappings of the shadow buffers. | |
194 | * Mappings are maintained during the atomic commit by the plane's prepare_fb | |
195 | * and cleanup_fb helpers. See drm_gem_prepare_shadow_fb() and drm_gem_cleanup_shadow_fb() | |
196 | * for corresponding helpers. | |
197 | */ | |
198 | void | |
199 | __drm_gem_duplicate_shadow_plane_state(struct drm_plane *plane, | |
200 | struct drm_shadow_plane_state *new_shadow_plane_state) | |
201 | { | |
202 | __drm_atomic_helper_plane_duplicate_state(plane, &new_shadow_plane_state->base); | |
203 | } | |
204 | EXPORT_SYMBOL(__drm_gem_duplicate_shadow_plane_state); | |
205 | ||
9dc9067d TZ |
206 | /** |
207 | * drm_gem_duplicate_shadow_plane_state - duplicates shadow-buffered plane state | |
208 | * @plane: the plane | |
209 | * | |
210 | * This function implements struct &drm_plane_funcs.atomic_duplicate_state for | |
211 | * shadow-buffered planes. It assumes the existing state to be of type | |
212 | * struct drm_shadow_plane_state and it allocates the new state to be of this | |
213 | * type. | |
214 | * | |
215 | * The function does not duplicate existing mappings of the shadow buffers. | |
216 | * Mappings are maintained during the atomic commit by the plane's prepare_fb | |
217 | * and cleanup_fb helpers. See drm_gem_prepare_shadow_fb() and drm_gem_cleanup_shadow_fb() | |
218 | * for corresponding helpers. | |
219 | * | |
220 | * Returns: | |
221 | * A pointer to a new plane state on success, or NULL otherwise. | |
222 | */ | |
223 | struct drm_plane_state * | |
6dd7b6ce TZ |
224 | drm_gem_duplicate_shadow_plane_state(struct drm_plane *plane) |
225 | { | |
226 | struct drm_plane_state *plane_state = plane->state; | |
227 | struct drm_shadow_plane_state *new_shadow_plane_state; | |
228 | ||
229 | if (!plane_state) | |
230 | return NULL; | |
231 | ||
232 | new_shadow_plane_state = kzalloc(sizeof(*new_shadow_plane_state), GFP_KERNEL); | |
233 | if (!new_shadow_plane_state) | |
234 | return NULL; | |
b7156502 | 235 | __drm_gem_duplicate_shadow_plane_state(plane, new_shadow_plane_state); |
6dd7b6ce TZ |
236 | |
237 | return &new_shadow_plane_state->base; | |
238 | } | |
9dc9067d | 239 | EXPORT_SYMBOL(drm_gem_duplicate_shadow_plane_state); |
6dd7b6ce | 240 | |
b7156502 TZ |
241 | /** |
242 | * __drm_gem_destroy_shadow_plane_state - cleans up shadow-buffered plane state | |
243 | * @shadow_plane_state: the shadow-buffered plane state | |
244 | * | |
245 | * This function cleans up shadow-buffered plane state. Helpful for drivers that | |
246 | * subclass struct drm_shadow_plane_state. | |
247 | */ | |
248 | void __drm_gem_destroy_shadow_plane_state(struct drm_shadow_plane_state *shadow_plane_state) | |
249 | { | |
250 | __drm_atomic_helper_plane_destroy_state(&shadow_plane_state->base); | |
251 | } | |
252 | EXPORT_SYMBOL(__drm_gem_destroy_shadow_plane_state); | |
253 | ||
9dc9067d TZ |
254 | /** |
255 | * drm_gem_destroy_shadow_plane_state - deletes shadow-buffered plane state | |
256 | * @plane: the plane | |
257 | * @plane_state: the plane state of type struct drm_shadow_plane_state | |
258 | * | |
259 | * This function implements struct &drm_plane_funcs.atomic_destroy_state | |
260 | * for shadow-buffered planes. It expects that mappings of shadow buffers | |
261 | * have been released already. | |
262 | */ | |
263 | void drm_gem_destroy_shadow_plane_state(struct drm_plane *plane, | |
264 | struct drm_plane_state *plane_state) | |
6dd7b6ce TZ |
265 | { |
266 | struct drm_shadow_plane_state *shadow_plane_state = | |
267 | to_drm_shadow_plane_state(plane_state); | |
268 | ||
b7156502 | 269 | __drm_gem_destroy_shadow_plane_state(shadow_plane_state); |
6dd7b6ce TZ |
270 | kfree(shadow_plane_state); |
271 | } | |
9dc9067d | 272 | EXPORT_SYMBOL(drm_gem_destroy_shadow_plane_state); |
6dd7b6ce | 273 | |
b7156502 TZ |
274 | /** |
275 | * __drm_gem_reset_shadow_plane - resets a shadow-buffered plane | |
276 | * @plane: the plane | |
277 | * @shadow_plane_state: the shadow-buffered plane state | |
278 | * | |
279 | * This function resets state for shadow-buffered planes. Helpful | |
280 | * for drivers that subclass struct drm_shadow_plane_state. | |
281 | */ | |
282 | void __drm_gem_reset_shadow_plane(struct drm_plane *plane, | |
283 | struct drm_shadow_plane_state *shadow_plane_state) | |
284 | { | |
285 | __drm_atomic_helper_plane_reset(plane, &shadow_plane_state->base); | |
286 | } | |
287 | EXPORT_SYMBOL(__drm_gem_reset_shadow_plane); | |
288 | ||
9dc9067d TZ |
289 | /** |
290 | * drm_gem_reset_shadow_plane - resets a shadow-buffered plane | |
291 | * @plane: the plane | |
292 | * | |
293 | * This function implements struct &drm_plane_funcs.reset_plane for | |
294 | * shadow-buffered planes. It assumes the current plane state to be | |
295 | * of type struct drm_shadow_plane and it allocates the new state of | |
296 | * this type. | |
297 | */ | |
298 | void drm_gem_reset_shadow_plane(struct drm_plane *plane) | |
6dd7b6ce TZ |
299 | { |
300 | struct drm_shadow_plane_state *shadow_plane_state; | |
301 | ||
302 | if (plane->state) { | |
303 | drm_gem_destroy_shadow_plane_state(plane, plane->state); | |
304 | plane->state = NULL; /* must be set to NULL here */ | |
305 | } | |
306 | ||
307 | shadow_plane_state = kzalloc(sizeof(*shadow_plane_state), GFP_KERNEL); | |
308 | if (!shadow_plane_state) | |
309 | return; | |
b7156502 | 310 | __drm_gem_reset_shadow_plane(plane, shadow_plane_state); |
6dd7b6ce | 311 | } |
9dc9067d | 312 | EXPORT_SYMBOL(drm_gem_reset_shadow_plane); |
6dd7b6ce | 313 | |
9dc9067d TZ |
314 | /** |
315 | * drm_gem_prepare_shadow_fb - prepares shadow framebuffers | |
316 | * @plane: the plane | |
317 | * @plane_state: the plane state of type struct drm_shadow_plane_state | |
318 | * | |
319 | * This function implements struct &drm_plane_helper_funcs.prepare_fb. It | |
320 | * maps all buffer objects of the plane's framebuffer into kernel address | |
321 | * space and stores them in &struct drm_shadow_plane_state.map. The | |
322 | * framebuffer will be synchronized as part of the atomic commit. | |
323 | * | |
324 | * See drm_gem_cleanup_shadow_fb() for cleanup. | |
325 | * | |
326 | * Returns: | |
327 | * 0 on success, or a negative errno code otherwise. | |
328 | */ | |
329 | int drm_gem_prepare_shadow_fb(struct drm_plane *plane, struct drm_plane_state *plane_state) | |
6dd7b6ce TZ |
330 | { |
331 | struct drm_shadow_plane_state *shadow_plane_state = to_drm_shadow_plane_state(plane_state); | |
332 | struct drm_framebuffer *fb = plane_state->fb; | |
333 | struct drm_gem_object *obj; | |
334 | struct dma_buf_map map; | |
335 | int ret; | |
336 | size_t i; | |
337 | ||
338 | if (!fb) | |
339 | return 0; | |
340 | ||
820c1707 | 341 | ret = drm_gem_plane_helper_prepare_fb(plane, plane_state); |
6dd7b6ce TZ |
342 | if (ret) |
343 | return ret; | |
344 | ||
345 | for (i = 0; i < ARRAY_SIZE(shadow_plane_state->map); ++i) { | |
346 | obj = drm_gem_fb_get_obj(fb, i); | |
347 | if (!obj) | |
348 | continue; | |
349 | ret = drm_gem_vmap(obj, &map); | |
350 | if (ret) | |
351 | goto err_drm_gem_vunmap; | |
352 | shadow_plane_state->map[i] = map; | |
353 | } | |
354 | ||
355 | return 0; | |
356 | ||
357 | err_drm_gem_vunmap: | |
358 | while (i) { | |
359 | --i; | |
360 | obj = drm_gem_fb_get_obj(fb, i); | |
361 | if (!obj) | |
362 | continue; | |
363 | drm_gem_vunmap(obj, &shadow_plane_state->map[i]); | |
364 | } | |
365 | return ret; | |
366 | } | |
9dc9067d | 367 | EXPORT_SYMBOL(drm_gem_prepare_shadow_fb); |
6dd7b6ce | 368 | |
9dc9067d TZ |
369 | /** |
370 | * drm_gem_cleanup_shadow_fb - releases shadow framebuffers | |
371 | * @plane: the plane | |
372 | * @plane_state: the plane state of type struct drm_shadow_plane_state | |
373 | * | |
374 | * This function implements struct &drm_plane_helper_funcs.cleanup_fb. | |
375 | * This function unmaps all buffer objects of the plane's framebuffer. | |
376 | * | |
377 | * See drm_gem_prepare_shadow_fb() for more inforamtion. | |
378 | */ | |
379 | void drm_gem_cleanup_shadow_fb(struct drm_plane *plane, struct drm_plane_state *plane_state) | |
6dd7b6ce TZ |
380 | { |
381 | struct drm_shadow_plane_state *shadow_plane_state = to_drm_shadow_plane_state(plane_state); | |
382 | struct drm_framebuffer *fb = plane_state->fb; | |
383 | size_t i = ARRAY_SIZE(shadow_plane_state->map); | |
384 | struct drm_gem_object *obj; | |
385 | ||
386 | if (!fb) | |
387 | return; | |
388 | ||
389 | while (i) { | |
390 | --i; | |
391 | obj = drm_gem_fb_get_obj(fb, i); | |
392 | if (!obj) | |
393 | continue; | |
394 | drm_gem_vunmap(obj, &shadow_plane_state->map[i]); | |
395 | } | |
396 | } | |
9dc9067d | 397 | EXPORT_SYMBOL(drm_gem_cleanup_shadow_fb); |
6dd7b6ce TZ |
398 | |
399 | /** | |
400 | * drm_gem_simple_kms_prepare_shadow_fb - prepares shadow framebuffers | |
401 | * @pipe: the simple display pipe | |
402 | * @plane_state: the plane state of type struct drm_shadow_plane_state | |
403 | * | |
404 | * This function implements struct drm_simple_display_funcs.prepare_fb. It | |
405 | * maps all buffer objects of the plane's framebuffer into kernel address | |
406 | * space and stores them in struct drm_shadow_plane_state.map. The | |
407 | * framebuffer will be synchronized as part of the atomic commit. | |
408 | * | |
409 | * See drm_gem_simple_kms_cleanup_shadow_fb() for cleanup. | |
410 | * | |
411 | * Returns: | |
412 | * 0 on success, or a negative errno code otherwise. | |
413 | */ | |
414 | int drm_gem_simple_kms_prepare_shadow_fb(struct drm_simple_display_pipe *pipe, | |
415 | struct drm_plane_state *plane_state) | |
416 | { | |
417 | return drm_gem_prepare_shadow_fb(&pipe->plane, plane_state); | |
418 | } | |
419 | EXPORT_SYMBOL(drm_gem_simple_kms_prepare_shadow_fb); | |
420 | ||
421 | /** | |
422 | * drm_gem_simple_kms_cleanup_shadow_fb - releases shadow framebuffers | |
423 | * @pipe: the simple display pipe | |
424 | * @plane_state: the plane state of type struct drm_shadow_plane_state | |
425 | * | |
426 | * This function implements struct drm_simple_display_funcs.cleanup_fb. | |
427 | * This function unmaps all buffer objects of the plane's framebuffer. | |
428 | * | |
429 | * See drm_gem_simple_kms_prepare_shadow_fb(). | |
430 | */ | |
431 | void drm_gem_simple_kms_cleanup_shadow_fb(struct drm_simple_display_pipe *pipe, | |
432 | struct drm_plane_state *plane_state) | |
433 | { | |
434 | drm_gem_cleanup_shadow_fb(&pipe->plane, plane_state); | |
435 | } | |
436 | EXPORT_SYMBOL(drm_gem_simple_kms_cleanup_shadow_fb); | |
437 | ||
438 | /** | |
439 | * drm_gem_simple_kms_reset_shadow_plane - resets a shadow-buffered plane | |
440 | * @pipe: the simple display pipe | |
441 | * | |
442 | * This function implements struct drm_simple_display_funcs.reset_plane | |
443 | * for shadow-buffered planes. | |
444 | */ | |
445 | void drm_gem_simple_kms_reset_shadow_plane(struct drm_simple_display_pipe *pipe) | |
446 | { | |
447 | drm_gem_reset_shadow_plane(&pipe->plane); | |
448 | } | |
449 | EXPORT_SYMBOL(drm_gem_simple_kms_reset_shadow_plane); | |
450 | ||
451 | /** | |
452 | * drm_gem_simple_kms_duplicate_shadow_plane_state - duplicates shadow-buffered plane state | |
453 | * @pipe: the simple display pipe | |
454 | * | |
455 | * This function implements struct drm_simple_display_funcs.duplicate_plane_state | |
456 | * for shadow-buffered planes. It does not duplicate existing mappings of the shadow | |
457 | * buffers. Mappings are maintained during the atomic commit by the plane's prepare_fb | |
458 | * and cleanup_fb helpers. | |
459 | * | |
460 | * Returns: | |
461 | * A pointer to a new plane state on success, or NULL otherwise. | |
462 | */ | |
463 | struct drm_plane_state * | |
464 | drm_gem_simple_kms_duplicate_shadow_plane_state(struct drm_simple_display_pipe *pipe) | |
465 | { | |
466 | return drm_gem_duplicate_shadow_plane_state(&pipe->plane); | |
467 | } | |
468 | EXPORT_SYMBOL(drm_gem_simple_kms_duplicate_shadow_plane_state); | |
469 | ||
470 | /** | |
471 | * drm_gem_simple_kms_destroy_shadow_plane_state - resets shadow-buffered plane state | |
472 | * @pipe: the simple display pipe | |
473 | * @plane_state: the plane state of type struct drm_shadow_plane_state | |
474 | * | |
475 | * This function implements struct drm_simple_display_funcs.destroy_plane_state | |
476 | * for shadow-buffered planes. It expects that mappings of shadow buffers | |
477 | * have been released already. | |
478 | */ | |
479 | void drm_gem_simple_kms_destroy_shadow_plane_state(struct drm_simple_display_pipe *pipe, | |
480 | struct drm_plane_state *plane_state) | |
481 | { | |
482 | drm_gem_destroy_shadow_plane_state(&pipe->plane, plane_state); | |
483 | } | |
484 | EXPORT_SYMBOL(drm_gem_simple_kms_destroy_shadow_plane_state); |