Commit | Line | Data |
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2874c5fd | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
4c3dbb2c NT |
2 | /* |
3 | * drm gem framebuffer helper functions | |
4 | * | |
5 | * Copyright (C) 2017 Noralf Trønnes | |
4c3dbb2c NT |
6 | */ |
7 | ||
8 | #include <linux/dma-buf.h> | |
9 | #include <linux/dma-fence.h> | |
52791eee | 10 | #include <linux/dma-resv.h> |
4c3dbb2c NT |
11 | #include <linux/slab.h> |
12 | ||
4c3dbb2c | 13 | #include <drm/drm_atomic.h> |
72fdb40c | 14 | #include <drm/drm_atomic_uapi.h> |
dbd62e16 | 15 | #include <drm/drm_damage_helper.h> |
4c3dbb2c NT |
16 | #include <drm/drm_fb_helper.h> |
17 | #include <drm/drm_fourcc.h> | |
18 | #include <drm/drm_framebuffer.h> | |
19 | #include <drm/drm_gem.h> | |
20 | #include <drm/drm_gem_framebuffer_helper.h> | |
21 | #include <drm/drm_modeset_helper.h> | |
ccc3b2b3 | 22 | #include <drm/drm_simple_kms_helper.h> |
4c3dbb2c | 23 | |
55f7f727 AP |
24 | #define AFBC_HEADER_SIZE 16 |
25 | #define AFBC_TH_LAYOUT_ALIGNMENT 8 | |
26 | #define AFBC_HDR_ALIGN 64 | |
27 | #define AFBC_SUPERBLOCK_PIXELS 256 | |
28 | #define AFBC_SUPERBLOCK_ALIGNMENT 128 | |
29 | #define AFBC_TH_BODY_START_ALIGNMENT 4096 | |
30 | ||
4c3dbb2c NT |
31 | /** |
32 | * DOC: overview | |
33 | * | |
34 | * This library provides helpers for drivers that don't subclass | |
2e187b20 | 35 | * &drm_framebuffer and use &drm_gem_object for their backing storage. |
4c3dbb2c NT |
36 | * |
37 | * Drivers without additional needs to validate framebuffers can simply use | |
2e187b20 NT |
38 | * drm_gem_fb_create() and everything is wired up automatically. Other drivers |
39 | * can use all parts independently. | |
4c3dbb2c NT |
40 | */ |
41 | ||
42 | /** | |
2e187b20 NT |
43 | * drm_gem_fb_get_obj() - Get GEM object backing the framebuffer |
44 | * @fb: Framebuffer | |
45 | * @plane: Plane index | |
4c3dbb2c | 46 | * |
2e187b20 NT |
47 | * No additional reference is taken beyond the one that the &drm_frambuffer |
48 | * already holds. | |
49 | * | |
50 | * Returns: | |
51 | * Pointer to &drm_gem_object for the given framebuffer and plane index or NULL | |
52 | * if it does not exist. | |
4c3dbb2c NT |
53 | */ |
54 | struct drm_gem_object *drm_gem_fb_get_obj(struct drm_framebuffer *fb, | |
55 | unsigned int plane) | |
56 | { | |
57 | if (plane >= 4) | |
58 | return NULL; | |
59 | ||
60 | return fb->obj[plane]; | |
61 | } | |
62 | EXPORT_SYMBOL_GPL(drm_gem_fb_get_obj); | |
63 | ||
f2b816d7 AP |
64 | static int |
65 | drm_gem_fb_init(struct drm_device *dev, | |
66 | struct drm_framebuffer *fb, | |
4c3dbb2c NT |
67 | const struct drm_mode_fb_cmd2 *mode_cmd, |
68 | struct drm_gem_object **obj, unsigned int num_planes, | |
69 | const struct drm_framebuffer_funcs *funcs) | |
70 | { | |
4c3dbb2c NT |
71 | int ret, i; |
72 | ||
4c3dbb2c NT |
73 | drm_helper_mode_fill_fb_struct(dev, fb, mode_cmd); |
74 | ||
75 | for (i = 0; i < num_planes; i++) | |
76 | fb->obj[i] = obj[i]; | |
77 | ||
78 | ret = drm_framebuffer_init(dev, fb, funcs); | |
79 | if (ret) { | |
24f03be4 | 80 | drm_err(dev, "Failed to init framebuffer: %d\n", ret); |
4c3dbb2c | 81 | kfree(fb); |
4c3dbb2c NT |
82 | } |
83 | ||
f2b816d7 | 84 | return ret; |
4c3dbb2c NT |
85 | } |
86 | ||
87 | /** | |
88 | * drm_gem_fb_destroy - Free GEM backed framebuffer | |
2e187b20 | 89 | * @fb: Framebuffer |
4c3dbb2c NT |
90 | * |
91 | * Frees a GEM backed framebuffer with its backing buffer(s) and the structure | |
92 | * itself. Drivers can use this as their &drm_framebuffer_funcs->destroy | |
93 | * callback. | |
94 | */ | |
95 | void drm_gem_fb_destroy(struct drm_framebuffer *fb) | |
96 | { | |
97 | int i; | |
98 | ||
99 | for (i = 0; i < 4; i++) | |
100 | drm_gem_object_put_unlocked(fb->obj[i]); | |
101 | ||
102 | drm_framebuffer_cleanup(fb); | |
103 | kfree(fb); | |
104 | } | |
105 | EXPORT_SYMBOL(drm_gem_fb_destroy); | |
106 | ||
107 | /** | |
108 | * drm_gem_fb_create_handle - Create handle for GEM backed framebuffer | |
2e187b20 NT |
109 | * @fb: Framebuffer |
110 | * @file: DRM file to register the handle for | |
111 | * @handle: Pointer to return the created handle | |
4c3dbb2c | 112 | * |
2e187b20 | 113 | * This function creates a handle for the GEM object backing the framebuffer. |
4c3dbb2c | 114 | * Drivers can use this as their &drm_framebuffer_funcs->create_handle |
2e187b20 | 115 | * callback. The GETFB IOCTL calls into this callback. |
4c3dbb2c NT |
116 | * |
117 | * Returns: | |
118 | * 0 on success or a negative error code on failure. | |
119 | */ | |
120 | int drm_gem_fb_create_handle(struct drm_framebuffer *fb, struct drm_file *file, | |
121 | unsigned int *handle) | |
122 | { | |
123 | return drm_gem_handle_create(file, fb->obj[0], handle); | |
124 | } | |
125 | EXPORT_SYMBOL(drm_gem_fb_create_handle); | |
126 | ||
127 | /** | |
f2b816d7 AP |
128 | * drm_gem_fb_init_with_funcs() - Helper function for implementing |
129 | * &drm_mode_config_funcs.fb_create | |
130 | * callback in cases when the driver | |
131 | * allocates a subclass of | |
132 | * struct drm_framebuffer | |
4c3dbb2c | 133 | * @dev: DRM device |
f2b816d7 | 134 | * @fb: framebuffer object |
2e187b20 NT |
135 | * @file: DRM file that holds the GEM handle(s) backing the framebuffer |
136 | * @mode_cmd: Metadata from the userspace framebuffer creation request | |
4c3dbb2c NT |
137 | * @funcs: vtable to be used for the new framebuffer object |
138 | * | |
dbd62e16 NT |
139 | * This function can be used to set &drm_framebuffer_funcs for drivers that need |
140 | * custom framebuffer callbacks. Use drm_gem_fb_create() if you don't need to | |
141 | * change &drm_framebuffer_funcs. The function does buffer size validation. | |
f2b816d7 AP |
142 | * The buffer size validation is for a general case, though, so users should |
143 | * pay attention to the checks being appropriate for them or, at least, | |
144 | * non-conflicting. | |
2e187b20 NT |
145 | * |
146 | * Returns: | |
f2b816d7 | 147 | * Zero or a negative error code. |
4c3dbb2c | 148 | */ |
f2b816d7 AP |
149 | int drm_gem_fb_init_with_funcs(struct drm_device *dev, |
150 | struct drm_framebuffer *fb, | |
151 | struct drm_file *file, | |
152 | const struct drm_mode_fb_cmd2 *mode_cmd, | |
153 | const struct drm_framebuffer_funcs *funcs) | |
4c3dbb2c NT |
154 | { |
155 | const struct drm_format_info *info; | |
156 | struct drm_gem_object *objs[4]; | |
4c3dbb2c NT |
157 | int ret, i; |
158 | ||
159 | info = drm_get_format_info(dev, mode_cmd); | |
160 | if (!info) | |
f2b816d7 | 161 | return -EINVAL; |
4c3dbb2c NT |
162 | |
163 | for (i = 0; i < info->num_planes; i++) { | |
164 | unsigned int width = mode_cmd->width / (i ? info->hsub : 1); | |
165 | unsigned int height = mode_cmd->height / (i ? info->vsub : 1); | |
166 | unsigned int min_size; | |
167 | ||
168 | objs[i] = drm_gem_object_lookup(file, mode_cmd->handles[i]); | |
169 | if (!objs[i]) { | |
24f03be4 | 170 | drm_dbg_kms(dev, "Failed to lookup GEM object\n"); |
4c3dbb2c NT |
171 | ret = -ENOENT; |
172 | goto err_gem_object_put; | |
173 | } | |
174 | ||
175 | min_size = (height - 1) * mode_cmd->pitches[i] | |
042bf753 | 176 | + drm_format_info_min_pitch(info, i, width) |
4c3dbb2c NT |
177 | + mode_cmd->offsets[i]; |
178 | ||
179 | if (objs[i]->size < min_size) { | |
180 | drm_gem_object_put_unlocked(objs[i]); | |
181 | ret = -EINVAL; | |
182 | goto err_gem_object_put; | |
183 | } | |
184 | } | |
185 | ||
f2b816d7 AP |
186 | ret = drm_gem_fb_init(dev, fb, mode_cmd, objs, i, funcs); |
187 | if (ret) | |
4c3dbb2c | 188 | goto err_gem_object_put; |
4c3dbb2c | 189 | |
f2b816d7 | 190 | return 0; |
4c3dbb2c NT |
191 | |
192 | err_gem_object_put: | |
193 | for (i--; i >= 0; i--) | |
194 | drm_gem_object_put_unlocked(objs[i]); | |
195 | ||
f2b816d7 AP |
196 | return ret; |
197 | } | |
198 | EXPORT_SYMBOL_GPL(drm_gem_fb_init_with_funcs); | |
199 | ||
200 | /** | |
201 | * drm_gem_fb_create_with_funcs() - Helper function for the | |
202 | * &drm_mode_config_funcs.fb_create | |
203 | * callback | |
204 | * @dev: DRM device | |
205 | * @file: DRM file that holds the GEM handle(s) backing the framebuffer | |
206 | * @mode_cmd: Metadata from the userspace framebuffer creation request | |
207 | * @funcs: vtable to be used for the new framebuffer object | |
208 | * | |
209 | * This function can be used to set &drm_framebuffer_funcs for drivers that need | |
210 | * custom framebuffer callbacks. Use drm_gem_fb_create() if you don't need to | |
211 | * change &drm_framebuffer_funcs. The function does buffer size validation. | |
212 | * | |
213 | * Returns: | |
214 | * Pointer to a &drm_framebuffer on success or an error pointer on failure. | |
215 | */ | |
216 | struct drm_framebuffer * | |
217 | drm_gem_fb_create_with_funcs(struct drm_device *dev, struct drm_file *file, | |
218 | const struct drm_mode_fb_cmd2 *mode_cmd, | |
219 | const struct drm_framebuffer_funcs *funcs) | |
220 | { | |
221 | struct drm_framebuffer *fb; | |
222 | int ret; | |
223 | ||
224 | fb = kzalloc(sizeof(*fb), GFP_KERNEL); | |
225 | if (!fb) | |
226 | return ERR_PTR(-ENOMEM); | |
227 | ||
228 | ret = drm_gem_fb_init_with_funcs(dev, fb, file, mode_cmd, funcs); | |
229 | if (ret) { | |
230 | kfree(fb); | |
231 | return ERR_PTR(ret); | |
232 | } | |
233 | ||
234 | return fb; | |
4c3dbb2c NT |
235 | } |
236 | EXPORT_SYMBOL_GPL(drm_gem_fb_create_with_funcs); | |
237 | ||
238 | static const struct drm_framebuffer_funcs drm_gem_fb_funcs = { | |
239 | .destroy = drm_gem_fb_destroy, | |
240 | .create_handle = drm_gem_fb_create_handle, | |
241 | }; | |
242 | ||
243 | /** | |
2e187b20 NT |
244 | * drm_gem_fb_create() - Helper function for the |
245 | * &drm_mode_config_funcs.fb_create callback | |
4c3dbb2c | 246 | * @dev: DRM device |
2e187b20 NT |
247 | * @file: DRM file that holds the GEM handle(s) backing the framebuffer |
248 | * @mode_cmd: Metadata from the userspace framebuffer creation request | |
249 | * | |
250 | * This function creates a new framebuffer object described by | |
251 | * &drm_mode_fb_cmd2. This description includes handles for the buffer(s) | |
252 | * backing the framebuffer. | |
4c3dbb2c NT |
253 | * |
254 | * If your hardware has special alignment or pitch requirements these should be | |
255 | * checked before calling this function. The function does buffer size | |
dbd62e16 NT |
256 | * validation. Use drm_gem_fb_create_with_dirty() if you need framebuffer |
257 | * flushing. | |
2e187b20 NT |
258 | * |
259 | * Drivers can use this as their &drm_mode_config_funcs.fb_create callback. | |
260 | * The ADDFB2 IOCTL calls into this callback. | |
261 | * | |
262 | * Returns: | |
263 | * Pointer to a &drm_framebuffer on success or an error pointer on failure. | |
4c3dbb2c NT |
264 | */ |
265 | struct drm_framebuffer * | |
266 | drm_gem_fb_create(struct drm_device *dev, struct drm_file *file, | |
267 | const struct drm_mode_fb_cmd2 *mode_cmd) | |
268 | { | |
269 | return drm_gem_fb_create_with_funcs(dev, file, mode_cmd, | |
270 | &drm_gem_fb_funcs); | |
271 | } | |
272 | EXPORT_SYMBOL_GPL(drm_gem_fb_create); | |
273 | ||
dbd62e16 NT |
274 | static const struct drm_framebuffer_funcs drm_gem_fb_funcs_dirtyfb = { |
275 | .destroy = drm_gem_fb_destroy, | |
276 | .create_handle = drm_gem_fb_create_handle, | |
277 | .dirty = drm_atomic_helper_dirtyfb, | |
278 | }; | |
279 | ||
280 | /** | |
281 | * drm_gem_fb_create_with_dirty() - Helper function for the | |
282 | * &drm_mode_config_funcs.fb_create callback | |
283 | * @dev: DRM device | |
284 | * @file: DRM file that holds the GEM handle(s) backing the framebuffer | |
285 | * @mode_cmd: Metadata from the userspace framebuffer creation request | |
286 | * | |
287 | * This function creates a new framebuffer object described by | |
288 | * &drm_mode_fb_cmd2. This description includes handles for the buffer(s) | |
289 | * backing the framebuffer. drm_atomic_helper_dirtyfb() is used for the dirty | |
290 | * callback giving framebuffer flushing through the atomic machinery. Use | |
291 | * drm_gem_fb_create() if you don't need the dirty callback. | |
292 | * The function does buffer size validation. | |
293 | * | |
294 | * Drivers should also call drm_plane_enable_fb_damage_clips() on all planes | |
295 | * to enable userspace to use damage clips also with the ATOMIC IOCTL. | |
296 | * | |
297 | * Drivers can use this as their &drm_mode_config_funcs.fb_create callback. | |
298 | * The ADDFB2 IOCTL calls into this callback. | |
299 | * | |
300 | * Returns: | |
301 | * Pointer to a &drm_framebuffer on success or an error pointer on failure. | |
302 | */ | |
303 | struct drm_framebuffer * | |
304 | drm_gem_fb_create_with_dirty(struct drm_device *dev, struct drm_file *file, | |
305 | const struct drm_mode_fb_cmd2 *mode_cmd) | |
306 | { | |
307 | return drm_gem_fb_create_with_funcs(dev, file, mode_cmd, | |
308 | &drm_gem_fb_funcs_dirtyfb); | |
309 | } | |
310 | EXPORT_SYMBOL_GPL(drm_gem_fb_create_with_dirty); | |
311 | ||
55f7f727 AP |
312 | static int drm_gem_afbc_min_size(struct drm_device *dev, |
313 | const struct drm_mode_fb_cmd2 *mode_cmd, | |
314 | struct drm_afbc_framebuffer *afbc_fb) | |
315 | { | |
316 | const struct drm_format_info *info; | |
317 | __u32 n_blocks, w_alignment, h_alignment, hdr_alignment; | |
318 | /* remove bpp when all users properly encode cpp in drm_format_info */ | |
319 | __u32 bpp; | |
320 | ||
321 | switch (mode_cmd->modifier[0] & AFBC_FORMAT_MOD_BLOCK_SIZE_MASK) { | |
322 | case AFBC_FORMAT_MOD_BLOCK_SIZE_16x16: | |
323 | afbc_fb->block_width = 16; | |
324 | afbc_fb->block_height = 16; | |
325 | break; | |
326 | case AFBC_FORMAT_MOD_BLOCK_SIZE_32x8: | |
327 | afbc_fb->block_width = 32; | |
328 | afbc_fb->block_height = 8; | |
329 | break; | |
330 | /* no user exists yet - fall through */ | |
331 | case AFBC_FORMAT_MOD_BLOCK_SIZE_64x4: | |
332 | case AFBC_FORMAT_MOD_BLOCK_SIZE_32x8_64x4: | |
333 | default: | |
88f1b29a AP |
334 | drm_dbg_kms(dev, "Invalid AFBC_FORMAT_MOD_BLOCK_SIZE: %lld.\n", |
335 | mode_cmd->modifier[0] | |
336 | & AFBC_FORMAT_MOD_BLOCK_SIZE_MASK); | |
55f7f727 AP |
337 | return -EINVAL; |
338 | } | |
339 | ||
340 | /* tiled header afbc */ | |
341 | w_alignment = afbc_fb->block_width; | |
342 | h_alignment = afbc_fb->block_height; | |
343 | hdr_alignment = AFBC_HDR_ALIGN; | |
344 | if (mode_cmd->modifier[0] & AFBC_FORMAT_MOD_TILED) { | |
345 | w_alignment *= AFBC_TH_LAYOUT_ALIGNMENT; | |
346 | h_alignment *= AFBC_TH_LAYOUT_ALIGNMENT; | |
347 | hdr_alignment = AFBC_TH_BODY_START_ALIGNMENT; | |
348 | } | |
349 | ||
350 | afbc_fb->aligned_width = ALIGN(mode_cmd->width, w_alignment); | |
351 | afbc_fb->aligned_height = ALIGN(mode_cmd->height, h_alignment); | |
352 | afbc_fb->offset = mode_cmd->offsets[0]; | |
353 | ||
354 | info = drm_get_format_info(dev, mode_cmd); | |
355 | /* | |
356 | * Change to always using info->cpp[0] | |
357 | * when all users properly encode it | |
358 | */ | |
359 | bpp = info->cpp[0] ? info->cpp[0] * 8 : afbc_fb->bpp; | |
360 | ||
361 | n_blocks = (afbc_fb->aligned_width * afbc_fb->aligned_height) | |
362 | / AFBC_SUPERBLOCK_PIXELS; | |
363 | afbc_fb->afbc_size = ALIGN(n_blocks * AFBC_HEADER_SIZE, hdr_alignment); | |
364 | afbc_fb->afbc_size += n_blocks * ALIGN(bpp * AFBC_SUPERBLOCK_PIXELS / 8, | |
365 | AFBC_SUPERBLOCK_ALIGNMENT); | |
366 | ||
367 | return 0; | |
368 | } | |
369 | ||
370 | /** | |
371 | * drm_gem_fb_afbc_init() - Helper function for drivers using afbc to | |
372 | * fill and validate all the afbc-specific | |
373 | * struct drm_afbc_framebuffer members | |
374 | * | |
375 | * @dev: DRM device | |
376 | * @afbc_fb: afbc-specific framebuffer | |
377 | * @mode_cmd: Metadata from the userspace framebuffer creation request | |
378 | * @afbc_fb: afbc framebuffer | |
379 | * | |
380 | * This function can be used by drivers which support afbc to complete | |
381 | * the preparation of struct drm_afbc_framebuffer. It must be called after | |
382 | * allocating the said struct and calling drm_gem_fb_init_with_funcs(). | |
383 | * It is caller's responsibility to put afbc_fb->base.obj objects in case | |
384 | * the call is unsuccessful. | |
385 | * | |
386 | * Returns: | |
387 | * Zero on success or a negative error value on failure. | |
388 | */ | |
389 | int drm_gem_fb_afbc_init(struct drm_device *dev, | |
390 | const struct drm_mode_fb_cmd2 *mode_cmd, | |
391 | struct drm_afbc_framebuffer *afbc_fb) | |
392 | { | |
393 | const struct drm_format_info *info; | |
394 | struct drm_gem_object **objs; | |
395 | int ret; | |
396 | ||
397 | objs = afbc_fb->base.obj; | |
398 | info = drm_get_format_info(dev, mode_cmd); | |
399 | if (!info) | |
400 | return -EINVAL; | |
401 | ||
402 | ret = drm_gem_afbc_min_size(dev, mode_cmd, afbc_fb); | |
403 | if (ret < 0) | |
404 | return ret; | |
405 | ||
406 | if (objs[0]->size < afbc_fb->afbc_size) | |
407 | return -EINVAL; | |
408 | ||
409 | return 0; | |
410 | } | |
411 | EXPORT_SYMBOL_GPL(drm_gem_fb_afbc_init); | |
412 | ||
4c3dbb2c | 413 | /** |
2e187b20 NT |
414 | * drm_gem_fb_prepare_fb() - Prepare a GEM backed framebuffer |
415 | * @plane: Plane | |
416 | * @state: Plane state the fence will be attached to | |
4c3dbb2c | 417 | * |
bd630a86 DV |
418 | * This function extracts the exclusive fence from &drm_gem_object.resv and |
419 | * attaches it to plane state for the atomic helper to wait on. This is | |
420 | * necessary to correctly implement implicit synchronization for any buffers | |
421 | * shared as a struct &dma_buf. This function can be used as the | |
422 | * &drm_plane_helper_funcs.prepare_fb callback. | |
4c3dbb2c NT |
423 | * |
424 | * There is no need for &drm_plane_helper_funcs.cleanup_fb hook for simple | |
425 | * gem based framebuffer drivers which have their buffers always pinned in | |
426 | * memory. | |
1b94f477 DV |
427 | * |
428 | * See drm_atomic_set_fence_for_plane() for a discussion of implicit and | |
429 | * explicit fencing in atomic modeset updates. | |
4c3dbb2c NT |
430 | */ |
431 | int drm_gem_fb_prepare_fb(struct drm_plane *plane, | |
432 | struct drm_plane_state *state) | |
433 | { | |
bd630a86 | 434 | struct drm_gem_object *obj; |
4c3dbb2c NT |
435 | struct dma_fence *fence; |
436 | ||
9d54fcd5 | 437 | if (!state->fb) |
4c3dbb2c NT |
438 | return 0; |
439 | ||
bd630a86 | 440 | obj = drm_gem_fb_get_obj(state->fb, 0); |
52791eee | 441 | fence = dma_resv_get_excl_rcu(obj->resv); |
bd630a86 | 442 | drm_atomic_set_fence_for_plane(state, fence); |
4c3dbb2c NT |
443 | |
444 | return 0; | |
445 | } | |
446 | EXPORT_SYMBOL_GPL(drm_gem_fb_prepare_fb); | |
447 | ||
ccc3b2b3 DV |
448 | /** |
449 | * drm_gem_fb_simple_display_pipe_prepare_fb - prepare_fb helper for | |
450 | * &drm_simple_display_pipe | |
451 | * @pipe: Simple display pipe | |
452 | * @plane_state: Plane state | |
453 | * | |
bd630a86 DV |
454 | * This function uses drm_gem_fb_prepare_fb() to extract the exclusive fence |
455 | * from &drm_gem_object.resv and attaches it to plane state for the atomic | |
456 | * helper to wait on. This is necessary to correctly implement implicit | |
457 | * synchronization for any buffers shared as a struct &dma_buf. Drivers can use | |
458 | * this as their &drm_simple_display_pipe_funcs.prepare_fb callback. | |
1b94f477 DV |
459 | * |
460 | * See drm_atomic_set_fence_for_plane() for a discussion of implicit and | |
461 | * explicit fencing in atomic modeset updates. | |
ccc3b2b3 DV |
462 | */ |
463 | int drm_gem_fb_simple_display_pipe_prepare_fb(struct drm_simple_display_pipe *pipe, | |
464 | struct drm_plane_state *plane_state) | |
465 | { | |
466 | return drm_gem_fb_prepare_fb(&pipe->plane, plane_state); | |
467 | } | |
468 | EXPORT_SYMBOL(drm_gem_fb_simple_display_pipe_prepare_fb); |