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Commit | Line | Data |
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53e269c1 LP |
1 | /* |
2 | * Media entity | |
3 | * | |
4 | * Copyright (C) 2010 Nokia Corporation | |
5 | * | |
6 | * Contacts: Laurent Pinchart <laurent.pinchart@ideasonboard.com> | |
7 | * Sakari Ailus <sakari.ailus@iki.fi> | |
8 | * | |
9 | * This program is free software; you can redistribute it and/or modify | |
10 | * it under the terms of the GNU General Public License version 2 as | |
11 | * published by the Free Software Foundation. | |
12 | * | |
13 | * This program is distributed in the hope that it will be useful, | |
14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | * GNU General Public License for more details. | |
53e269c1 LP |
17 | */ |
18 | ||
5c7b25b9 | 19 | #include <linux/bitmap.h> |
53e269c1 | 20 | #include <linux/module.h> |
d295c6a4 | 21 | #include <linux/property.h> |
53e269c1 LP |
22 | #include <linux/slab.h> |
23 | #include <media/media-entity.h> | |
503c3d82 | 24 | #include <media/media-device.h> |
53e269c1 | 25 | |
39a956c4 MCC |
26 | static inline const char *gobj_type(enum media_gobj_type type) |
27 | { | |
28 | switch (type) { | |
29 | case MEDIA_GRAPH_ENTITY: | |
30 | return "entity"; | |
31 | case MEDIA_GRAPH_PAD: | |
32 | return "pad"; | |
33 | case MEDIA_GRAPH_LINK: | |
34 | return "link"; | |
27e543fa MCC |
35 | case MEDIA_GRAPH_INTF_DEVNODE: |
36 | return "intf-devnode"; | |
39a956c4 MCC |
37 | default: |
38 | return "unknown"; | |
39 | } | |
40 | } | |
41 | ||
27e543fa MCC |
42 | static inline const char *intf_type(struct media_interface *intf) |
43 | { | |
44 | switch (intf->type) { | |
45 | case MEDIA_INTF_T_DVB_FE: | |
66c1db1b | 46 | return "dvb-frontend"; |
27e543fa | 47 | case MEDIA_INTF_T_DVB_DEMUX: |
66c1db1b | 48 | return "dvb-demux"; |
27e543fa | 49 | case MEDIA_INTF_T_DVB_DVR: |
66c1db1b | 50 | return "dvb-dvr"; |
27e543fa | 51 | case MEDIA_INTF_T_DVB_CA: |
66c1db1b | 52 | return "dvb-ca"; |
27e543fa | 53 | case MEDIA_INTF_T_DVB_NET: |
66c1db1b | 54 | return "dvb-net"; |
27e543fa | 55 | case MEDIA_INTF_T_V4L_VIDEO: |
66c1db1b | 56 | return "v4l-video"; |
27e543fa | 57 | case MEDIA_INTF_T_V4L_VBI: |
66c1db1b | 58 | return "v4l-vbi"; |
27e543fa | 59 | case MEDIA_INTF_T_V4L_RADIO: |
66c1db1b | 60 | return "v4l-radio"; |
27e543fa | 61 | case MEDIA_INTF_T_V4L_SUBDEV: |
66c1db1b | 62 | return "v4l-subdev"; |
27e543fa | 63 | case MEDIA_INTF_T_V4L_SWRADIO: |
66c1db1b | 64 | return "v4l-swradio"; |
b2fe22d0 ND |
65 | case MEDIA_INTF_T_V4L_TOUCH: |
66 | return "v4l-touch"; | |
5af557a6 | 67 | case MEDIA_INTF_T_ALSA_PCM_CAPTURE: |
66c1db1b | 68 | return "alsa-pcm-capture"; |
5af557a6 | 69 | case MEDIA_INTF_T_ALSA_PCM_PLAYBACK: |
66c1db1b | 70 | return "alsa-pcm-playback"; |
5af557a6 SK |
71 | case MEDIA_INTF_T_ALSA_CONTROL: |
72 | return "alsa-control"; | |
73 | case MEDIA_INTF_T_ALSA_COMPRESS: | |
66c1db1b | 74 | return "alsa-compress"; |
5af557a6 | 75 | case MEDIA_INTF_T_ALSA_RAWMIDI: |
66c1db1b | 76 | return "alsa-rawmidi"; |
5af557a6 | 77 | case MEDIA_INTF_T_ALSA_HWDEP: |
66c1db1b | 78 | return "alsa-hwdep"; |
5af557a6 | 79 | case MEDIA_INTF_T_ALSA_SEQUENCER: |
66c1db1b | 80 | return "alsa-sequencer"; |
5af557a6 | 81 | case MEDIA_INTF_T_ALSA_TIMER: |
66c1db1b | 82 | return "alsa-timer"; |
27e543fa MCC |
83 | default: |
84 | return "unknown-intf"; | |
85 | } | |
86 | }; | |
87 | ||
c8d54cd5 SA |
88 | __must_check int __media_entity_enum_init(struct media_entity_enum *ent_enum, |
89 | int idx_max) | |
90 | { | |
f7b5dff0 SA |
91 | idx_max = ALIGN(idx_max, BITS_PER_LONG); |
92 | ent_enum->bmap = kcalloc(idx_max / BITS_PER_LONG, sizeof(long), | |
93 | GFP_KERNEL); | |
030e89ec SA |
94 | if (!ent_enum->bmap) |
95 | return -ENOMEM; | |
c8d54cd5 SA |
96 | |
97 | bitmap_zero(ent_enum->bmap, idx_max); | |
98 | ent_enum->idx_max = idx_max; | |
99 | ||
100 | return 0; | |
101 | } | |
102 | EXPORT_SYMBOL_GPL(__media_entity_enum_init); | |
103 | ||
c8d54cd5 SA |
104 | void media_entity_enum_cleanup(struct media_entity_enum *ent_enum) |
105 | { | |
030e89ec | 106 | kfree(ent_enum->bmap); |
c8d54cd5 SA |
107 | } |
108 | EXPORT_SYMBOL_GPL(media_entity_enum_cleanup); | |
109 | ||
1fc25d30 MCC |
110 | /** |
111 | * dev_dbg_obj - Prints in debug mode a change on some object | |
112 | * | |
113 | * @event_name: Name of the event to report. Could be __func__ | |
114 | * @gobj: Pointer to the object | |
115 | * | |
116 | * Enabled only if DEBUG or CONFIG_DYNAMIC_DEBUG. Otherwise, it | |
117 | * won't produce any code. | |
118 | */ | |
39a956c4 MCC |
119 | static void dev_dbg_obj(const char *event_name, struct media_gobj *gobj) |
120 | { | |
121 | #if defined(DEBUG) || defined (CONFIG_DYNAMIC_DEBUG) | |
122 | switch (media_type(gobj)) { | |
123 | case MEDIA_GRAPH_ENTITY: | |
124 | dev_dbg(gobj->mdev->dev, | |
05b3b77c MCC |
125 | "%s id %u: entity '%s'\n", |
126 | event_name, media_id(gobj), | |
39a956c4 MCC |
127 | gobj_to_entity(gobj)->name); |
128 | break; | |
129 | case MEDIA_GRAPH_LINK: | |
130 | { | |
131 | struct media_link *link = gobj_to_link(gobj); | |
132 | ||
133 | dev_dbg(gobj->mdev->dev, | |
05b3b77c MCC |
134 | "%s id %u: %s link id %u ==> id %u\n", |
135 | event_name, media_id(gobj), | |
136 | media_type(link->gobj0) == MEDIA_GRAPH_PAD ? | |
137 | "data" : "interface", | |
138 | media_id(link->gobj0), | |
139 | media_id(link->gobj1)); | |
39a956c4 MCC |
140 | break; |
141 | } | |
142 | case MEDIA_GRAPH_PAD: | |
143 | { | |
144 | struct media_pad *pad = gobj_to_pad(gobj); | |
145 | ||
146 | dev_dbg(gobj->mdev->dev, | |
05b3b77c MCC |
147 | "%s id %u: %s%spad '%s':%d\n", |
148 | event_name, media_id(gobj), | |
149 | pad->flags & MEDIA_PAD_FL_SINK ? "sink " : "", | |
6c24d460 | 150 | pad->flags & MEDIA_PAD_FL_SOURCE ? "source " : "", |
39a956c4 | 151 | pad->entity->name, pad->index); |
27e543fa MCC |
152 | break; |
153 | } | |
154 | case MEDIA_GRAPH_INTF_DEVNODE: | |
155 | { | |
156 | struct media_interface *intf = gobj_to_intf(gobj); | |
157 | struct media_intf_devnode *devnode = intf_to_devnode(intf); | |
158 | ||
159 | dev_dbg(gobj->mdev->dev, | |
05b3b77c MCC |
160 | "%s id %u: intf_devnode %s - major: %d, minor: %d\n", |
161 | event_name, media_id(gobj), | |
27e543fa MCC |
162 | intf_type(intf), |
163 | devnode->major, devnode->minor); | |
164 | break; | |
39a956c4 MCC |
165 | } |
166 | } | |
167 | #endif | |
168 | } | |
169 | ||
c350ef83 | 170 | void media_gobj_create(struct media_device *mdev, |
ec6e4c95 MCC |
171 | enum media_gobj_type type, |
172 | struct media_gobj *gobj) | |
173 | { | |
8f6d368f MCC |
174 | BUG_ON(!mdev); |
175 | ||
39a956c4 MCC |
176 | gobj->mdev = mdev; |
177 | ||
bfab2aac | 178 | /* Create a per-type unique object ID */ |
05b3b77c MCC |
179 | gobj->id = media_gobj_gen_id(type, ++mdev->id); |
180 | ||
bfab2aac MCC |
181 | switch (type) { |
182 | case MEDIA_GRAPH_ENTITY: | |
05bfa9fa | 183 | list_add_tail(&gobj->list, &mdev->entities); |
bfab2aac | 184 | break; |
18710dc6 | 185 | case MEDIA_GRAPH_PAD: |
9155d859 | 186 | list_add_tail(&gobj->list, &mdev->pads); |
18710dc6 | 187 | break; |
6b6a4278 | 188 | case MEDIA_GRAPH_LINK: |
9155d859 | 189 | list_add_tail(&gobj->list, &mdev->links); |
6b6a4278 | 190 | break; |
27e543fa | 191 | case MEDIA_GRAPH_INTF_DEVNODE: |
9155d859 | 192 | list_add_tail(&gobj->list, &mdev->interfaces); |
27e543fa | 193 | break; |
bfab2aac | 194 | } |
2521fdac MCC |
195 | |
196 | mdev->topology_version++; | |
197 | ||
39a956c4 | 198 | dev_dbg_obj(__func__, gobj); |
ec6e4c95 MCC |
199 | } |
200 | ||
c350ef83 | 201 | void media_gobj_destroy(struct media_gobj *gobj) |
ec6e4c95 | 202 | { |
6753743e MK |
203 | /* Do nothing if the object is not linked. */ |
204 | if (gobj->mdev == NULL) | |
205 | return; | |
206 | ||
8d1d3d00 HF |
207 | dev_dbg_obj(__func__, gobj); |
208 | ||
2521fdac MCC |
209 | gobj->mdev->topology_version++; |
210 | ||
9155d859 MCC |
211 | /* Remove the object from mdev list */ |
212 | list_del(&gobj->list); | |
6753743e MK |
213 | |
214 | gobj->mdev = NULL; | |
ec6e4c95 MCC |
215 | } |
216 | ||
1fc25d30 MCC |
217 | int media_entity_pads_init(struct media_entity *entity, u16 num_pads, |
218 | struct media_pad *pads) | |
53e269c1 | 219 | { |
db141a35 | 220 | struct media_device *mdev = entity->graph_obj.mdev; |
53e269c1 LP |
221 | unsigned int i; |
222 | ||
53e269c1 LP |
223 | entity->num_pads = num_pads; |
224 | entity->pads = pads; | |
53e269c1 | 225 | |
db141a35 | 226 | if (mdev) |
e2c91d4d | 227 | mutex_lock(&mdev->graph_mutex); |
db141a35 | 228 | |
53e269c1 LP |
229 | for (i = 0; i < num_pads; i++) { |
230 | pads[i].entity = entity; | |
231 | pads[i].index = i; | |
db141a35 | 232 | if (mdev) |
c350ef83 | 233 | media_gobj_create(mdev, MEDIA_GRAPH_PAD, |
db141a35 | 234 | &entity->pads[i].graph_obj); |
53e269c1 LP |
235 | } |
236 | ||
db141a35 | 237 | if (mdev) |
e2c91d4d | 238 | mutex_unlock(&mdev->graph_mutex); |
db141a35 | 239 | |
53e269c1 LP |
240 | return 0; |
241 | } | |
ab22e77c | 242 | EXPORT_SYMBOL_GPL(media_entity_pads_init); |
53e269c1 | 243 | |
a5ccc48a SA |
244 | /* ----------------------------------------------------------------------------- |
245 | * Graph traversal | |
246 | */ | |
247 | ||
248 | static struct media_entity * | |
249 | media_entity_other(struct media_entity *entity, struct media_link *link) | |
250 | { | |
251 | if (link->source->entity == entity) | |
252 | return link->sink->entity; | |
253 | else | |
254 | return link->source->entity; | |
255 | } | |
256 | ||
257 | /* push an entity to traversal stack */ | |
20b85227 | 258 | static void stack_push(struct media_graph *graph, |
a5ccc48a SA |
259 | struct media_entity *entity) |
260 | { | |
261 | if (graph->top == MEDIA_ENTITY_ENUM_MAX_DEPTH - 1) { | |
262 | WARN_ON(1); | |
263 | return; | |
264 | } | |
265 | graph->top++; | |
313895fb | 266 | graph->stack[graph->top].link = entity->links.next; |
a5ccc48a SA |
267 | graph->stack[graph->top].entity = entity; |
268 | } | |
269 | ||
20b85227 | 270 | static struct media_entity *stack_pop(struct media_graph *graph) |
a5ccc48a SA |
271 | { |
272 | struct media_entity *entity; | |
273 | ||
274 | entity = graph->stack[graph->top].entity; | |
275 | graph->top--; | |
276 | ||
277 | return entity; | |
278 | } | |
279 | ||
a5ccc48a SA |
280 | #define link_top(en) ((en)->stack[(en)->top].link) |
281 | #define stack_top(en) ((en)->stack[(en)->top].entity) | |
282 | ||
0798ce4a SA |
283 | /* |
284 | * TODO: Get rid of this. | |
285 | */ | |
430a672c | 286 | #define MEDIA_ENTITY_MAX_PADS 512 |
0798ce4a | 287 | |
e03d2203 | 288 | /** |
20b85227 | 289 | * media_graph_walk_init - Allocate resources for graph walk |
e03d2203 SA |
290 | * @graph: Media graph structure that will be used to walk the graph |
291 | * @mdev: Media device | |
292 | * | |
293 | * Reserve resources for graph walk in media device's current | |
294 | * state. The memory must be released using | |
20b85227 | 295 | * media_graph_walk_free(). |
e03d2203 SA |
296 | * |
297 | * Returns error on failure, zero on success. | |
298 | */ | |
20b85227 SA |
299 | __must_check int media_graph_walk_init( |
300 | struct media_graph *graph, struct media_device *mdev) | |
e03d2203 | 301 | { |
29d8da02 | 302 | return media_entity_enum_init(&graph->ent_enum, mdev); |
e03d2203 | 303 | } |
20b85227 | 304 | EXPORT_SYMBOL_GPL(media_graph_walk_init); |
e03d2203 SA |
305 | |
306 | /** | |
20b85227 | 307 | * media_graph_walk_cleanup - Release resources related to graph walking |
e03d2203 SA |
308 | * @graph: Media graph structure that was used to walk the graph |
309 | */ | |
20b85227 | 310 | void media_graph_walk_cleanup(struct media_graph *graph) |
e03d2203 | 311 | { |
29d8da02 | 312 | media_entity_enum_cleanup(&graph->ent_enum); |
e03d2203 | 313 | } |
20b85227 | 314 | EXPORT_SYMBOL_GPL(media_graph_walk_cleanup); |
e03d2203 | 315 | |
20b85227 SA |
316 | void media_graph_walk_start(struct media_graph *graph, |
317 | struct media_entity *entity) | |
a5ccc48a | 318 | { |
29d8da02 SA |
319 | media_entity_enum_zero(&graph->ent_enum); |
320 | media_entity_enum_set(&graph->ent_enum, entity); | |
321 | ||
a5ccc48a SA |
322 | graph->top = 0; |
323 | graph->stack[graph->top].entity = NULL; | |
324 | stack_push(graph, entity); | |
aa79a84f SA |
325 | dev_dbg(entity->graph_obj.mdev->dev, |
326 | "begin graph walk at '%s'\n", entity->name); | |
a5ccc48a | 327 | } |
20b85227 | 328 | EXPORT_SYMBOL_GPL(media_graph_walk_start); |
a5ccc48a | 329 | |
5b1f8329 SA |
330 | static void media_graph_walk_iter(struct media_graph *graph) |
331 | { | |
332 | struct media_entity *entity = stack_top(graph); | |
333 | struct media_link *link; | |
334 | struct media_entity *next; | |
335 | ||
336 | link = list_entry(link_top(graph), typeof(*link), list); | |
337 | ||
338 | /* The link is not enabled so we do not follow. */ | |
339 | if (!(link->flags & MEDIA_LNK_FL_ENABLED)) { | |
340 | link_top(graph) = link_top(graph)->next; | |
aa79a84f SA |
341 | dev_dbg(entity->graph_obj.mdev->dev, |
342 | "walk: skipping disabled link '%s':%u -> '%s':%u\n", | |
343 | link->source->entity->name, link->source->index, | |
344 | link->sink->entity->name, link->sink->index); | |
5b1f8329 SA |
345 | return; |
346 | } | |
347 | ||
348 | /* Get the entity in the other end of the link . */ | |
349 | next = media_entity_other(entity, link); | |
350 | ||
351 | /* Has the entity already been visited? */ | |
352 | if (media_entity_enum_test_and_set(&graph->ent_enum, next)) { | |
353 | link_top(graph) = link_top(graph)->next; | |
aa79a84f SA |
354 | dev_dbg(entity->graph_obj.mdev->dev, |
355 | "walk: skipping entity '%s' (already seen)\n", | |
356 | next->name); | |
5b1f8329 SA |
357 | return; |
358 | } | |
359 | ||
360 | /* Push the new entity to stack and start over. */ | |
361 | link_top(graph) = link_top(graph)->next; | |
362 | stack_push(graph, next); | |
aa79a84f SA |
363 | dev_dbg(entity->graph_obj.mdev->dev, "walk: pushing '%s' on stack\n", |
364 | next->name); | |
5b1f8329 SA |
365 | } |
366 | ||
20b85227 | 367 | struct media_entity *media_graph_walk_next(struct media_graph *graph) |
a5ccc48a | 368 | { |
aa79a84f SA |
369 | struct media_entity *entity; |
370 | ||
a5ccc48a SA |
371 | if (stack_top(graph) == NULL) |
372 | return NULL; | |
373 | ||
374 | /* | |
375 | * Depth first search. Push entity to stack and continue from | |
376 | * top of the stack until no more entities on the level can be | |
377 | * found. | |
378 | */ | |
5b1f8329 SA |
379 | while (link_top(graph) != &stack_top(graph)->links) |
380 | media_graph_walk_iter(graph); | |
a5ccc48a | 381 | |
aa79a84f SA |
382 | entity = stack_pop(graph); |
383 | dev_dbg(entity->graph_obj.mdev->dev, | |
384 | "walk: returning entity '%s'\n", entity->name); | |
385 | ||
386 | return entity; | |
a5ccc48a | 387 | } |
20b85227 | 388 | EXPORT_SYMBOL_GPL(media_graph_walk_next); |
a5ccc48a | 389 | |
d295c6a4 NS |
390 | int media_entity_get_fwnode_pad(struct media_entity *entity, |
391 | struct fwnode_handle *fwnode, | |
392 | unsigned long direction_flags) | |
393 | { | |
394 | struct fwnode_endpoint endpoint; | |
395 | unsigned int i; | |
396 | int ret; | |
397 | ||
398 | if (!entity->ops || !entity->ops->get_fwnode_pad) { | |
399 | for (i = 0; i < entity->num_pads; i++) { | |
400 | if (entity->pads[i].flags & direction_flags) | |
401 | return i; | |
402 | } | |
403 | ||
404 | return -ENXIO; | |
405 | } | |
406 | ||
407 | ret = fwnode_graph_parse_endpoint(fwnode, &endpoint); | |
408 | if (ret) | |
409 | return ret; | |
410 | ||
411 | ret = entity->ops->get_fwnode_pad(&endpoint); | |
412 | if (ret < 0) | |
413 | return ret; | |
414 | ||
415 | if (ret >= entity->num_pads) | |
416 | return -ENXIO; | |
417 | ||
418 | if (!(entity->pads[ret].flags & direction_flags)) | |
419 | return -ENXIO; | |
420 | ||
421 | return ret; | |
422 | } | |
423 | EXPORT_SYMBOL_GPL(media_entity_get_fwnode_pad); | |
424 | ||
e02188c9 LP |
425 | /* ----------------------------------------------------------------------------- |
426 | * Pipeline management | |
427 | */ | |
428 | ||
20b85227 SA |
429 | __must_check int __media_pipeline_start(struct media_entity *entity, |
430 | struct media_pipeline *pipe) | |
e02188c9 | 431 | { |
d10c9894 | 432 | struct media_device *mdev = entity->graph_obj.mdev; |
20b85227 | 433 | struct media_graph *graph = &pipe->graph; |
af88be38 | 434 | struct media_entity *entity_err = entity; |
57208e5e | 435 | struct media_link *link; |
af88be38 | 436 | int ret; |
e02188c9 | 437 | |
74a41330 | 438 | if (!pipe->streaming_count++) { |
20b85227 | 439 | ret = media_graph_walk_init(&pipe->graph, mdev); |
74a41330 SA |
440 | if (ret) |
441 | goto error_graph_walk_start; | |
106b9907 SA |
442 | } |
443 | ||
20b85227 | 444 | media_graph_walk_start(&pipe->graph, entity); |
e02188c9 | 445 | |
20b85227 | 446 | while ((entity = media_graph_walk_next(graph))) { |
ef69ee1b MCC |
447 | DECLARE_BITMAP(active, MEDIA_ENTITY_MAX_PADS); |
448 | DECLARE_BITMAP(has_no_links, MEDIA_ENTITY_MAX_PADS); | |
af88be38 | 449 | |
e02188c9 | 450 | entity->stream_count++; |
8aaf62b5 SA |
451 | |
452 | if (WARN_ON(entity->pipe && entity->pipe != pipe)) { | |
453 | ret = -EBUSY; | |
454 | goto error; | |
455 | } | |
456 | ||
e02188c9 | 457 | entity->pipe = pipe; |
af88be38 SA |
458 | |
459 | /* Already streaming --- no need to check. */ | |
460 | if (entity->stream_count > 1) | |
461 | continue; | |
462 | ||
463 | if (!entity->ops || !entity->ops->link_validate) | |
464 | continue; | |
465 | ||
de49c285 SA |
466 | bitmap_zero(active, entity->num_pads); |
467 | bitmap_fill(has_no_links, entity->num_pads); | |
468 | ||
57208e5e | 469 | list_for_each_entry(link, &entity->links, list) { |
de49c285 SA |
470 | struct media_pad *pad = link->sink->entity == entity |
471 | ? link->sink : link->source; | |
472 | ||
473 | /* Mark that a pad is connected by a link. */ | |
474 | bitmap_clear(has_no_links, pad->index, 1); | |
475 | ||
476 | /* | |
477 | * Pads that either do not need to connect or | |
478 | * are connected through an enabled link are | |
479 | * fine. | |
480 | */ | |
481 | if (!(pad->flags & MEDIA_PAD_FL_MUST_CONNECT) || | |
482 | link->flags & MEDIA_LNK_FL_ENABLED) | |
483 | bitmap_set(active, pad->index, 1); | |
484 | ||
485 | /* | |
486 | * Link validation will only take place for | |
487 | * sink ends of the link that are enabled. | |
488 | */ | |
489 | if (link->sink != pad || | |
490 | !(link->flags & MEDIA_LNK_FL_ENABLED)) | |
af88be38 SA |
491 | continue; |
492 | ||
493 | ret = entity->ops->link_validate(link); | |
fab9d30b | 494 | if (ret < 0 && ret != -ENOIOCTLCMD) { |
d10c9894 | 495 | dev_dbg(entity->graph_obj.mdev->dev, |
91b619ad | 496 | "link validation failed for '%s':%u -> '%s':%u, error %d\n", |
823ea2a6 SA |
497 | link->source->entity->name, |
498 | link->source->index, | |
499 | entity->name, link->sink->index, ret); | |
af88be38 | 500 | goto error; |
fab9d30b | 501 | } |
af88be38 | 502 | } |
de49c285 SA |
503 | |
504 | /* Either no links or validated links are fine. */ | |
505 | bitmap_or(active, active, has_no_links, entity->num_pads); | |
506 | ||
507 | if (!bitmap_full(active, entity->num_pads)) { | |
47dfdb3a | 508 | ret = -ENOLINK; |
d10c9894 | 509 | dev_dbg(entity->graph_obj.mdev->dev, |
91b619ad | 510 | "'%s':%u must be connected by an enabled link\n", |
fab9d30b | 511 | entity->name, |
094f1ca5 SA |
512 | (unsigned)find_first_zero_bit( |
513 | active, entity->num_pads)); | |
de49c285 SA |
514 | goto error; |
515 | } | |
e02188c9 LP |
516 | } |
517 | ||
af88be38 SA |
518 | return 0; |
519 | ||
520 | error: | |
521 | /* | |
522 | * Link validation on graph failed. We revert what we did and | |
523 | * return the error. | |
524 | */ | |
20b85227 | 525 | media_graph_walk_start(graph, entity_err); |
af88be38 | 526 | |
20b85227 | 527 | while ((entity_err = media_graph_walk_next(graph))) { |
12030f48 SA |
528 | /* Sanity check for negative stream_count */ |
529 | if (!WARN_ON_ONCE(entity_err->stream_count <= 0)) { | |
3801bc7d SK |
530 | entity_err->stream_count--; |
531 | if (entity_err->stream_count == 0) | |
532 | entity_err->pipe = NULL; | |
533 | } | |
af88be38 SA |
534 | |
535 | /* | |
536 | * We haven't increased stream_count further than this | |
537 | * so we quit here. | |
538 | */ | |
539 | if (entity_err == entity) | |
540 | break; | |
541 | } | |
542 | ||
74a41330 SA |
543 | error_graph_walk_start: |
544 | if (!--pipe->streaming_count) | |
20b85227 | 545 | media_graph_walk_cleanup(graph); |
106b9907 | 546 | |
fb49f204 SK |
547 | return ret; |
548 | } | |
20b85227 | 549 | EXPORT_SYMBOL_GPL(__media_pipeline_start); |
af88be38 | 550 | |
20b85227 SA |
551 | __must_check int media_pipeline_start(struct media_entity *entity, |
552 | struct media_pipeline *pipe) | |
fb49f204 SK |
553 | { |
554 | struct media_device *mdev = entity->graph_obj.mdev; | |
555 | int ret; | |
556 | ||
557 | mutex_lock(&mdev->graph_mutex); | |
20b85227 | 558 | ret = __media_pipeline_start(entity, pipe); |
fb49f204 | 559 | mutex_unlock(&mdev->graph_mutex); |
af88be38 | 560 | return ret; |
e02188c9 | 561 | } |
20b85227 | 562 | EXPORT_SYMBOL_GPL(media_pipeline_start); |
e02188c9 | 563 | |
20b85227 | 564 | void __media_pipeline_stop(struct media_entity *entity) |
e02188c9 | 565 | { |
20b85227 | 566 | struct media_graph *graph = &entity->pipe->graph; |
74a41330 | 567 | struct media_pipeline *pipe = entity->pipe; |
e02188c9 | 568 | |
2a2599c6 KB |
569 | /* |
570 | * If the following check fails, the driver has performed an | |
571 | * unbalanced call to media_pipeline_stop() | |
572 | */ | |
573 | if (WARN_ON(!pipe)) | |
574 | return; | |
e02188c9 | 575 | |
20b85227 | 576 | media_graph_walk_start(graph, entity); |
e02188c9 | 577 | |
20b85227 | 578 | while ((entity = media_graph_walk_next(graph))) { |
12030f48 SA |
579 | /* Sanity check for negative stream_count */ |
580 | if (!WARN_ON_ONCE(entity->stream_count <= 0)) { | |
3801bc7d SK |
581 | entity->stream_count--; |
582 | if (entity->stream_count == 0) | |
583 | entity->pipe = NULL; | |
584 | } | |
e02188c9 LP |
585 | } |
586 | ||
74a41330 | 587 | if (!--pipe->streaming_count) |
20b85227 | 588 | media_graph_walk_cleanup(graph); |
106b9907 | 589 | |
fb49f204 | 590 | } |
20b85227 | 591 | EXPORT_SYMBOL_GPL(__media_pipeline_stop); |
fb49f204 | 592 | |
20b85227 | 593 | void media_pipeline_stop(struct media_entity *entity) |
fb49f204 SK |
594 | { |
595 | struct media_device *mdev = entity->graph_obj.mdev; | |
596 | ||
597 | mutex_lock(&mdev->graph_mutex); | |
20b85227 | 598 | __media_pipeline_stop(entity); |
e02188c9 LP |
599 | mutex_unlock(&mdev->graph_mutex); |
600 | } | |
20b85227 | 601 | EXPORT_SYMBOL_GPL(media_pipeline_stop); |
e02188c9 | 602 | |
503c3d82 LP |
603 | /* ----------------------------------------------------------------------------- |
604 | * Module use count | |
605 | */ | |
606 | ||
503c3d82 LP |
607 | struct media_entity *media_entity_get(struct media_entity *entity) |
608 | { | |
609 | if (entity == NULL) | |
610 | return NULL; | |
611 | ||
d10c9894 JMC |
612 | if (entity->graph_obj.mdev->dev && |
613 | !try_module_get(entity->graph_obj.mdev->dev->driver->owner)) | |
503c3d82 LP |
614 | return NULL; |
615 | ||
616 | return entity; | |
617 | } | |
618 | EXPORT_SYMBOL_GPL(media_entity_get); | |
619 | ||
503c3d82 LP |
620 | void media_entity_put(struct media_entity *entity) |
621 | { | |
622 | if (entity == NULL) | |
623 | return; | |
624 | ||
d10c9894 JMC |
625 | if (entity->graph_obj.mdev->dev) |
626 | module_put(entity->graph_obj.mdev->dev->driver->owner); | |
503c3d82 LP |
627 | } |
628 | EXPORT_SYMBOL_GPL(media_entity_put); | |
629 | ||
a5ccc48a SA |
630 | /* ----------------------------------------------------------------------------- |
631 | * Links management | |
632 | */ | |
633 | ||
23615de5 | 634 | static struct media_link *media_add_link(struct list_head *head) |
53e269c1 | 635 | { |
57208e5e | 636 | struct media_link *link; |
53e269c1 | 637 | |
57208e5e MCC |
638 | link = kzalloc(sizeof(*link), GFP_KERNEL); |
639 | if (link == NULL) | |
640 | return NULL; | |
53e269c1 | 641 | |
23615de5 | 642 | list_add_tail(&link->list, head); |
53e269c1 | 643 | |
57208e5e | 644 | return link; |
53e269c1 LP |
645 | } |
646 | ||
57208e5e | 647 | static void __media_entity_remove_link(struct media_entity *entity, |
5abad22f MCC |
648 | struct media_link *link) |
649 | { | |
650 | struct media_link *rlink, *tmp; | |
651 | struct media_entity *remote; | |
5abad22f MCC |
652 | |
653 | if (link->source->entity == entity) | |
654 | remote = link->sink->entity; | |
655 | else | |
656 | remote = link->source->entity; | |
657 | ||
658 | list_for_each_entry_safe(rlink, tmp, &remote->links, list) { | |
58f69ee9 | 659 | if (rlink != link->reverse) |
5abad22f | 660 | continue; |
5abad22f MCC |
661 | |
662 | if (link->source->entity == entity) | |
663 | remote->num_backlinks--; | |
664 | ||
665 | /* Remove the remote link */ | |
666 | list_del(&rlink->list); | |
c350ef83 | 667 | media_gobj_destroy(&rlink->graph_obj); |
5abad22f MCC |
668 | kfree(rlink); |
669 | ||
670 | if (--remote->num_links == 0) | |
671 | break; | |
672 | } | |
673 | list_del(&link->list); | |
c350ef83 | 674 | media_gobj_destroy(&link->graph_obj); |
5abad22f MCC |
675 | kfree(link); |
676 | } | |
57208e5e | 677 | |
53e269c1 | 678 | int |
8df00a15 | 679 | media_create_pad_link(struct media_entity *source, u16 source_pad, |
53e269c1 LP |
680 | struct media_entity *sink, u16 sink_pad, u32 flags) |
681 | { | |
682 | struct media_link *link; | |
683 | struct media_link *backlink; | |
684 | ||
685 | BUG_ON(source == NULL || sink == NULL); | |
686 | BUG_ON(source_pad >= source->num_pads); | |
687 | BUG_ON(sink_pad >= sink->num_pads); | |
688 | ||
23615de5 | 689 | link = media_add_link(&source->links); |
53e269c1 LP |
690 | if (link == NULL) |
691 | return -ENOMEM; | |
692 | ||
693 | link->source = &source->pads[source_pad]; | |
694 | link->sink = &sink->pads[sink_pad]; | |
82ae2a50 | 695 | link->flags = flags & ~MEDIA_LNK_FL_INTERFACE_LINK; |
53e269c1 | 696 | |
6b6a4278 | 697 | /* Initialize graph object embedded at the new link */ |
c350ef83 | 698 | media_gobj_create(source->graph_obj.mdev, MEDIA_GRAPH_LINK, |
d10c9894 | 699 | &link->graph_obj); |
6b6a4278 | 700 | |
53e269c1 LP |
701 | /* Create the backlink. Backlinks are used to help graph traversal and |
702 | * are not reported to userspace. | |
703 | */ | |
23615de5 | 704 | backlink = media_add_link(&sink->links); |
53e269c1 | 705 | if (backlink == NULL) { |
57208e5e | 706 | __media_entity_remove_link(source, link); |
53e269c1 LP |
707 | return -ENOMEM; |
708 | } | |
709 | ||
710 | backlink->source = &source->pads[source_pad]; | |
711 | backlink->sink = &sink->pads[sink_pad]; | |
712 | backlink->flags = flags; | |
39d1ebc6 | 713 | backlink->is_backlink = true; |
53e269c1 | 714 | |
6b6a4278 | 715 | /* Initialize graph object embedded at the new link */ |
c350ef83 | 716 | media_gobj_create(sink->graph_obj.mdev, MEDIA_GRAPH_LINK, |
d10c9894 | 717 | &backlink->graph_obj); |
6b6a4278 | 718 | |
53e269c1 LP |
719 | link->reverse = backlink; |
720 | backlink->reverse = link; | |
721 | ||
722 | sink->num_backlinks++; | |
57208e5e MCC |
723 | sink->num_links++; |
724 | source->num_links++; | |
53e269c1 LP |
725 | |
726 | return 0; | |
727 | } | |
8df00a15 | 728 | EXPORT_SYMBOL_GPL(media_create_pad_link); |
97548ed4 | 729 | |
b01cc9ce MCC |
730 | int media_create_pad_links(const struct media_device *mdev, |
731 | const u32 source_function, | |
732 | struct media_entity *source, | |
733 | const u16 source_pad, | |
734 | const u32 sink_function, | |
735 | struct media_entity *sink, | |
736 | const u16 sink_pad, | |
737 | u32 flags, | |
738 | const bool allow_both_undefined) | |
739 | { | |
740 | struct media_entity *entity; | |
741 | unsigned function; | |
742 | int ret; | |
743 | ||
744 | /* Trivial case: 1:1 relation */ | |
745 | if (source && sink) | |
746 | return media_create_pad_link(source, source_pad, | |
747 | sink, sink_pad, flags); | |
748 | ||
749 | /* Worse case scenario: n:n relation */ | |
750 | if (!source && !sink) { | |
751 | if (!allow_both_undefined) | |
752 | return 0; | |
753 | media_device_for_each_entity(source, mdev) { | |
754 | if (source->function != source_function) | |
755 | continue; | |
756 | media_device_for_each_entity(sink, mdev) { | |
757 | if (sink->function != sink_function) | |
758 | continue; | |
759 | ret = media_create_pad_link(source, source_pad, | |
760 | sink, sink_pad, | |
761 | flags); | |
762 | if (ret) | |
763 | return ret; | |
764 | flags &= ~(MEDIA_LNK_FL_ENABLED | | |
765 | MEDIA_LNK_FL_IMMUTABLE); | |
766 | } | |
767 | } | |
768 | return 0; | |
769 | } | |
770 | ||
771 | /* Handle 1:n and n:1 cases */ | |
772 | if (source) | |
773 | function = sink_function; | |
774 | else | |
775 | function = source_function; | |
776 | ||
777 | media_device_for_each_entity(entity, mdev) { | |
778 | if (entity->function != function) | |
779 | continue; | |
780 | ||
781 | if (source) | |
782 | ret = media_create_pad_link(source, source_pad, | |
783 | entity, sink_pad, flags); | |
784 | else | |
785 | ret = media_create_pad_link(entity, source_pad, | |
786 | sink, sink_pad, flags); | |
787 | if (ret) | |
788 | return ret; | |
789 | flags &= ~(MEDIA_LNK_FL_ENABLED | MEDIA_LNK_FL_IMMUTABLE); | |
790 | } | |
791 | return 0; | |
792 | } | |
793 | EXPORT_SYMBOL_GPL(media_create_pad_links); | |
794 | ||
57208e5e MCC |
795 | void __media_entity_remove_links(struct media_entity *entity) |
796 | { | |
797 | struct media_link *link, *tmp; | |
7349cec1 | 798 | |
57208e5e MCC |
799 | list_for_each_entry_safe(link, tmp, &entity->links, list) |
800 | __media_entity_remove_link(entity, link); | |
7349cec1 SN |
801 | |
802 | entity->num_links = 0; | |
803 | entity->num_backlinks = 0; | |
804 | } | |
805 | EXPORT_SYMBOL_GPL(__media_entity_remove_links); | |
806 | ||
807 | void media_entity_remove_links(struct media_entity *entity) | |
808 | { | |
cc4a8258 MCC |
809 | struct media_device *mdev = entity->graph_obj.mdev; |
810 | ||
7349cec1 | 811 | /* Do nothing if the entity is not registered. */ |
cc4a8258 | 812 | if (mdev == NULL) |
7349cec1 SN |
813 | return; |
814 | ||
e2c91d4d | 815 | mutex_lock(&mdev->graph_mutex); |
7349cec1 | 816 | __media_entity_remove_links(entity); |
e2c91d4d | 817 | mutex_unlock(&mdev->graph_mutex); |
7349cec1 SN |
818 | } |
819 | EXPORT_SYMBOL_GPL(media_entity_remove_links); | |
820 | ||
97548ed4 LP |
821 | static int __media_entity_setup_link_notify(struct media_link *link, u32 flags) |
822 | { | |
97548ed4 LP |
823 | int ret; |
824 | ||
825 | /* Notify both entities. */ | |
826 | ret = media_entity_call(link->source->entity, link_setup, | |
827 | link->source, link->sink, flags); | |
828 | if (ret < 0 && ret != -ENOIOCTLCMD) | |
829 | return ret; | |
830 | ||
831 | ret = media_entity_call(link->sink->entity, link_setup, | |
832 | link->sink, link->source, flags); | |
833 | if (ret < 0 && ret != -ENOIOCTLCMD) { | |
834 | media_entity_call(link->source->entity, link_setup, | |
835 | link->source, link->sink, link->flags); | |
836 | return ret; | |
837 | } | |
838 | ||
7a6f0b22 | 839 | link->flags = flags; |
97548ed4 LP |
840 | link->reverse->flags = link->flags; |
841 | ||
842 | return 0; | |
843 | } | |
844 | ||
97548ed4 LP |
845 | int __media_entity_setup_link(struct media_link *link, u32 flags) |
846 | { | |
7a6f0b22 | 847 | const u32 mask = MEDIA_LNK_FL_ENABLED; |
97548ed4 LP |
848 | struct media_device *mdev; |
849 | struct media_entity *source, *sink; | |
850 | int ret = -EBUSY; | |
851 | ||
852 | if (link == NULL) | |
853 | return -EINVAL; | |
854 | ||
7a6f0b22 LP |
855 | /* The non-modifiable link flags must not be modified. */ |
856 | if ((link->flags & ~mask) != (flags & ~mask)) | |
857 | return -EINVAL; | |
858 | ||
97548ed4 LP |
859 | if (link->flags & MEDIA_LNK_FL_IMMUTABLE) |
860 | return link->flags == flags ? 0 : -EINVAL; | |
861 | ||
862 | if (link->flags == flags) | |
863 | return 0; | |
864 | ||
865 | source = link->source->entity; | |
866 | sink = link->sink->entity; | |
867 | ||
e02188c9 LP |
868 | if (!(link->flags & MEDIA_LNK_FL_DYNAMIC) && |
869 | (source->stream_count || sink->stream_count)) | |
870 | return -EBUSY; | |
871 | ||
d10c9894 | 872 | mdev = source->graph_obj.mdev; |
97548ed4 | 873 | |
68429f50 LP |
874 | if (mdev->ops && mdev->ops->link_notify) { |
875 | ret = mdev->ops->link_notify(link, flags, | |
876 | MEDIA_DEV_NOTIFY_PRE_LINK_CH); | |
97548ed4 LP |
877 | if (ret < 0) |
878 | return ret; | |
879 | } | |
880 | ||
881 | ret = __media_entity_setup_link_notify(link, flags); | |
97548ed4 | 882 | |
68429f50 LP |
883 | if (mdev->ops && mdev->ops->link_notify) |
884 | mdev->ops->link_notify(link, flags, | |
885 | MEDIA_DEV_NOTIFY_POST_LINK_CH); | |
97548ed4 LP |
886 | |
887 | return ret; | |
888 | } | |
efc70278 | 889 | EXPORT_SYMBOL_GPL(__media_entity_setup_link); |
97548ed4 LP |
890 | |
891 | int media_entity_setup_link(struct media_link *link, u32 flags) | |
892 | { | |
893 | int ret; | |
894 | ||
5c883edb | 895 | mutex_lock(&link->graph_obj.mdev->graph_mutex); |
97548ed4 | 896 | ret = __media_entity_setup_link(link, flags); |
5c883edb | 897 | mutex_unlock(&link->graph_obj.mdev->graph_mutex); |
97548ed4 LP |
898 | |
899 | return ret; | |
900 | } | |
901 | EXPORT_SYMBOL_GPL(media_entity_setup_link); | |
902 | ||
97548ed4 LP |
903 | struct media_link * |
904 | media_entity_find_link(struct media_pad *source, struct media_pad *sink) | |
905 | { | |
906 | struct media_link *link; | |
97548ed4 | 907 | |
57208e5e | 908 | list_for_each_entry(link, &source->entity->links, list) { |
97548ed4 LP |
909 | if (link->source->entity == source->entity && |
910 | link->source->index == source->index && | |
911 | link->sink->entity == sink->entity && | |
912 | link->sink->index == sink->index) | |
913 | return link; | |
914 | } | |
915 | ||
916 | return NULL; | |
917 | } | |
918 | EXPORT_SYMBOL_GPL(media_entity_find_link); | |
919 | ||
1bddf1b3 | 920 | struct media_pad *media_entity_remote_pad(struct media_pad *pad) |
97548ed4 | 921 | { |
57208e5e | 922 | struct media_link *link; |
97548ed4 | 923 | |
57208e5e | 924 | list_for_each_entry(link, &pad->entity->links, list) { |
97548ed4 LP |
925 | if (!(link->flags & MEDIA_LNK_FL_ENABLED)) |
926 | continue; | |
927 | ||
928 | if (link->source == pad) | |
929 | return link->sink; | |
930 | ||
931 | if (link->sink == pad) | |
932 | return link->source; | |
933 | } | |
934 | ||
935 | return NULL; | |
936 | ||
937 | } | |
1bddf1b3 | 938 | EXPORT_SYMBOL_GPL(media_entity_remote_pad); |
27e543fa | 939 | |
1283f849 MCC |
940 | static void media_interface_init(struct media_device *mdev, |
941 | struct media_interface *intf, | |
942 | u32 gobj_type, | |
943 | u32 intf_type, u32 flags) | |
944 | { | |
945 | intf->type = intf_type; | |
946 | intf->flags = flags; | |
947 | INIT_LIST_HEAD(&intf->links); | |
948 | ||
c350ef83 | 949 | media_gobj_create(mdev, gobj_type, &intf->graph_obj); |
1283f849 MCC |
950 | } |
951 | ||
27e543fa MCC |
952 | /* Functions related to the media interface via device nodes */ |
953 | ||
954 | struct media_intf_devnode *media_devnode_create(struct media_device *mdev, | |
955 | u32 type, u32 flags, | |
0b3b72df | 956 | u32 major, u32 minor) |
27e543fa MCC |
957 | { |
958 | struct media_intf_devnode *devnode; | |
27e543fa | 959 | |
0b3b72df | 960 | devnode = kzalloc(sizeof(*devnode), GFP_KERNEL); |
27e543fa MCC |
961 | if (!devnode) |
962 | return NULL; | |
963 | ||
27e543fa MCC |
964 | devnode->major = major; |
965 | devnode->minor = minor; | |
966 | ||
1283f849 MCC |
967 | media_interface_init(mdev, &devnode->intf, MEDIA_GRAPH_INTF_DEVNODE, |
968 | type, flags); | |
27e543fa MCC |
969 | |
970 | return devnode; | |
971 | } | |
972 | EXPORT_SYMBOL_GPL(media_devnode_create); | |
973 | ||
974 | void media_devnode_remove(struct media_intf_devnode *devnode) | |
975 | { | |
7c4696a9 | 976 | media_remove_intf_links(&devnode->intf); |
c350ef83 | 977 | media_gobj_destroy(&devnode->intf.graph_obj); |
27e543fa MCC |
978 | kfree(devnode); |
979 | } | |
980 | EXPORT_SYMBOL_GPL(media_devnode_remove); | |
86e26620 MCC |
981 | |
982 | struct media_link *media_create_intf_link(struct media_entity *entity, | |
983 | struct media_interface *intf, | |
984 | u32 flags) | |
985 | { | |
986 | struct media_link *link; | |
987 | ||
988 | link = media_add_link(&intf->links); | |
989 | if (link == NULL) | |
990 | return NULL; | |
991 | ||
992 | link->intf = intf; | |
993 | link->entity = entity; | |
82ae2a50 | 994 | link->flags = flags | MEDIA_LNK_FL_INTERFACE_LINK; |
86e26620 MCC |
995 | |
996 | /* Initialize graph object embedded at the new link */ | |
c350ef83 | 997 | media_gobj_create(intf->graph_obj.mdev, MEDIA_GRAPH_LINK, |
86e26620 MCC |
998 | &link->graph_obj); |
999 | ||
1000 | return link; | |
1001 | } | |
1002 | EXPORT_SYMBOL_GPL(media_create_intf_link); | |
1003 | ||
d47109fa | 1004 | void __media_remove_intf_link(struct media_link *link) |
86e26620 | 1005 | { |
d47109fa | 1006 | list_del(&link->list); |
c350ef83 | 1007 | media_gobj_destroy(&link->graph_obj); |
86e26620 MCC |
1008 | kfree(link); |
1009 | } | |
d47109fa | 1010 | EXPORT_SYMBOL_GPL(__media_remove_intf_link); |
86e26620 MCC |
1011 | |
1012 | void media_remove_intf_link(struct media_link *link) | |
1013 | { | |
cc4a8258 MCC |
1014 | struct media_device *mdev = link->graph_obj.mdev; |
1015 | ||
1016 | /* Do nothing if the intf is not registered. */ | |
1017 | if (mdev == NULL) | |
1018 | return; | |
1019 | ||
e2c91d4d | 1020 | mutex_lock(&mdev->graph_mutex); |
86e26620 | 1021 | __media_remove_intf_link(link); |
e2c91d4d | 1022 | mutex_unlock(&mdev->graph_mutex); |
86e26620 MCC |
1023 | } |
1024 | EXPORT_SYMBOL_GPL(media_remove_intf_link); | |
7c4696a9 MCC |
1025 | |
1026 | void __media_remove_intf_links(struct media_interface *intf) | |
1027 | { | |
1028 | struct media_link *link, *tmp; | |
1029 | ||
1030 | list_for_each_entry_safe(link, tmp, &intf->links, list) | |
1031 | __media_remove_intf_link(link); | |
1032 | ||
1033 | } | |
1034 | EXPORT_SYMBOL_GPL(__media_remove_intf_links); | |
1035 | ||
1036 | void media_remove_intf_links(struct media_interface *intf) | |
1037 | { | |
cc4a8258 MCC |
1038 | struct media_device *mdev = intf->graph_obj.mdev; |
1039 | ||
7c4696a9 | 1040 | /* Do nothing if the intf is not registered. */ |
cc4a8258 | 1041 | if (mdev == NULL) |
7c4696a9 MCC |
1042 | return; |
1043 | ||
e2c91d4d | 1044 | mutex_lock(&mdev->graph_mutex); |
7c4696a9 | 1045 | __media_remove_intf_links(intf); |
e2c91d4d | 1046 | mutex_unlock(&mdev->graph_mutex); |
7c4696a9 MCC |
1047 | } |
1048 | EXPORT_SYMBOL_GPL(media_remove_intf_links); |