Commit | Line | Data |
---|---|---|
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"; | |
27e543fa MCC |
67 | default: |
68 | return "unknown-intf"; | |
69 | } | |
70 | }; | |
71 | ||
c8d54cd5 SA |
72 | __must_check int __media_entity_enum_init(struct media_entity_enum *ent_enum, |
73 | int idx_max) | |
74 | { | |
f7b5dff0 SA |
75 | idx_max = ALIGN(idx_max, BITS_PER_LONG); |
76 | ent_enum->bmap = kcalloc(idx_max / BITS_PER_LONG, sizeof(long), | |
77 | GFP_KERNEL); | |
030e89ec SA |
78 | if (!ent_enum->bmap) |
79 | return -ENOMEM; | |
c8d54cd5 SA |
80 | |
81 | bitmap_zero(ent_enum->bmap, idx_max); | |
82 | ent_enum->idx_max = idx_max; | |
83 | ||
84 | return 0; | |
85 | } | |
86 | EXPORT_SYMBOL_GPL(__media_entity_enum_init); | |
87 | ||
c8d54cd5 SA |
88 | void media_entity_enum_cleanup(struct media_entity_enum *ent_enum) |
89 | { | |
030e89ec | 90 | kfree(ent_enum->bmap); |
c8d54cd5 SA |
91 | } |
92 | EXPORT_SYMBOL_GPL(media_entity_enum_cleanup); | |
93 | ||
1fc25d30 MCC |
94 | /** |
95 | * dev_dbg_obj - Prints in debug mode a change on some object | |
96 | * | |
97 | * @event_name: Name of the event to report. Could be __func__ | |
98 | * @gobj: Pointer to the object | |
99 | * | |
100 | * Enabled only if DEBUG or CONFIG_DYNAMIC_DEBUG. Otherwise, it | |
101 | * won't produce any code. | |
102 | */ | |
39a956c4 MCC |
103 | static void dev_dbg_obj(const char *event_name, struct media_gobj *gobj) |
104 | { | |
105 | #if defined(DEBUG) || defined (CONFIG_DYNAMIC_DEBUG) | |
106 | switch (media_type(gobj)) { | |
107 | case MEDIA_GRAPH_ENTITY: | |
108 | dev_dbg(gobj->mdev->dev, | |
05b3b77c MCC |
109 | "%s id %u: entity '%s'\n", |
110 | event_name, media_id(gobj), | |
39a956c4 MCC |
111 | gobj_to_entity(gobj)->name); |
112 | break; | |
113 | case MEDIA_GRAPH_LINK: | |
114 | { | |
115 | struct media_link *link = gobj_to_link(gobj); | |
116 | ||
117 | dev_dbg(gobj->mdev->dev, | |
05b3b77c MCC |
118 | "%s id %u: %s link id %u ==> id %u\n", |
119 | event_name, media_id(gobj), | |
120 | media_type(link->gobj0) == MEDIA_GRAPH_PAD ? | |
121 | "data" : "interface", | |
122 | media_id(link->gobj0), | |
123 | media_id(link->gobj1)); | |
39a956c4 MCC |
124 | break; |
125 | } | |
126 | case MEDIA_GRAPH_PAD: | |
127 | { | |
128 | struct media_pad *pad = gobj_to_pad(gobj); | |
129 | ||
130 | dev_dbg(gobj->mdev->dev, | |
05b3b77c MCC |
131 | "%s id %u: %s%spad '%s':%d\n", |
132 | event_name, media_id(gobj), | |
133 | pad->flags & MEDIA_PAD_FL_SINK ? "sink " : "", | |
6c24d460 | 134 | pad->flags & MEDIA_PAD_FL_SOURCE ? "source " : "", |
39a956c4 | 135 | pad->entity->name, pad->index); |
27e543fa MCC |
136 | break; |
137 | } | |
138 | case MEDIA_GRAPH_INTF_DEVNODE: | |
139 | { | |
140 | struct media_interface *intf = gobj_to_intf(gobj); | |
141 | struct media_intf_devnode *devnode = intf_to_devnode(intf); | |
142 | ||
143 | dev_dbg(gobj->mdev->dev, | |
05b3b77c MCC |
144 | "%s id %u: intf_devnode %s - major: %d, minor: %d\n", |
145 | event_name, media_id(gobj), | |
27e543fa MCC |
146 | intf_type(intf), |
147 | devnode->major, devnode->minor); | |
148 | break; | |
39a956c4 MCC |
149 | } |
150 | } | |
151 | #endif | |
152 | } | |
153 | ||
c350ef83 | 154 | void media_gobj_create(struct media_device *mdev, |
ec6e4c95 MCC |
155 | enum media_gobj_type type, |
156 | struct media_gobj *gobj) | |
157 | { | |
8f6d368f MCC |
158 | BUG_ON(!mdev); |
159 | ||
39a956c4 MCC |
160 | gobj->mdev = mdev; |
161 | ||
bfab2aac | 162 | /* Create a per-type unique object ID */ |
05b3b77c MCC |
163 | gobj->id = media_gobj_gen_id(type, ++mdev->id); |
164 | ||
bfab2aac MCC |
165 | switch (type) { |
166 | case MEDIA_GRAPH_ENTITY: | |
05bfa9fa | 167 | list_add_tail(&gobj->list, &mdev->entities); |
bfab2aac | 168 | break; |
18710dc6 | 169 | case MEDIA_GRAPH_PAD: |
9155d859 | 170 | list_add_tail(&gobj->list, &mdev->pads); |
18710dc6 | 171 | break; |
6b6a4278 | 172 | case MEDIA_GRAPH_LINK: |
9155d859 | 173 | list_add_tail(&gobj->list, &mdev->links); |
6b6a4278 | 174 | break; |
27e543fa | 175 | case MEDIA_GRAPH_INTF_DEVNODE: |
9155d859 | 176 | list_add_tail(&gobj->list, &mdev->interfaces); |
27e543fa | 177 | break; |
bfab2aac | 178 | } |
2521fdac MCC |
179 | |
180 | mdev->topology_version++; | |
181 | ||
39a956c4 | 182 | dev_dbg_obj(__func__, gobj); |
ec6e4c95 MCC |
183 | } |
184 | ||
c350ef83 | 185 | void media_gobj_destroy(struct media_gobj *gobj) |
ec6e4c95 | 186 | { |
6753743e MK |
187 | /* Do nothing if the object is not linked. */ |
188 | if (gobj->mdev == NULL) | |
189 | return; | |
190 | ||
8d1d3d00 HF |
191 | dev_dbg_obj(__func__, gobj); |
192 | ||
2521fdac MCC |
193 | gobj->mdev->topology_version++; |
194 | ||
9155d859 MCC |
195 | /* Remove the object from mdev list */ |
196 | list_del(&gobj->list); | |
6753743e MK |
197 | |
198 | gobj->mdev = NULL; | |
ec6e4c95 MCC |
199 | } |
200 | ||
885ca801 SA |
201 | /* |
202 | * TODO: Get rid of this. | |
203 | */ | |
204 | #define MEDIA_ENTITY_MAX_PADS 512 | |
205 | ||
1fc25d30 MCC |
206 | int media_entity_pads_init(struct media_entity *entity, u16 num_pads, |
207 | struct media_pad *pads) | |
53e269c1 | 208 | { |
db141a35 | 209 | struct media_device *mdev = entity->graph_obj.mdev; |
53e269c1 LP |
210 | unsigned int i; |
211 | ||
885ca801 SA |
212 | if (num_pads >= MEDIA_ENTITY_MAX_PADS) |
213 | return -E2BIG; | |
214 | ||
53e269c1 LP |
215 | entity->num_pads = num_pads; |
216 | entity->pads = pads; | |
53e269c1 | 217 | |
db141a35 | 218 | if (mdev) |
e2c91d4d | 219 | mutex_lock(&mdev->graph_mutex); |
db141a35 | 220 | |
53e269c1 LP |
221 | for (i = 0; i < num_pads; i++) { |
222 | pads[i].entity = entity; | |
223 | pads[i].index = i; | |
db141a35 | 224 | if (mdev) |
c350ef83 | 225 | media_gobj_create(mdev, MEDIA_GRAPH_PAD, |
db141a35 | 226 | &entity->pads[i].graph_obj); |
53e269c1 LP |
227 | } |
228 | ||
db141a35 | 229 | if (mdev) |
e2c91d4d | 230 | mutex_unlock(&mdev->graph_mutex); |
db141a35 | 231 | |
53e269c1 LP |
232 | return 0; |
233 | } | |
ab22e77c | 234 | EXPORT_SYMBOL_GPL(media_entity_pads_init); |
53e269c1 | 235 | |
a5ccc48a SA |
236 | /* ----------------------------------------------------------------------------- |
237 | * Graph traversal | |
238 | */ | |
239 | ||
240 | static struct media_entity * | |
241 | media_entity_other(struct media_entity *entity, struct media_link *link) | |
242 | { | |
243 | if (link->source->entity == entity) | |
244 | return link->sink->entity; | |
245 | else | |
246 | return link->source->entity; | |
247 | } | |
248 | ||
249 | /* push an entity to traversal stack */ | |
20b85227 | 250 | static void stack_push(struct media_graph *graph, |
a5ccc48a SA |
251 | struct media_entity *entity) |
252 | { | |
253 | if (graph->top == MEDIA_ENTITY_ENUM_MAX_DEPTH - 1) { | |
254 | WARN_ON(1); | |
255 | return; | |
256 | } | |
257 | graph->top++; | |
313895fb | 258 | graph->stack[graph->top].link = entity->links.next; |
a5ccc48a SA |
259 | graph->stack[graph->top].entity = entity; |
260 | } | |
261 | ||
20b85227 | 262 | static struct media_entity *stack_pop(struct media_graph *graph) |
a5ccc48a SA |
263 | { |
264 | struct media_entity *entity; | |
265 | ||
266 | entity = graph->stack[graph->top].entity; | |
267 | graph->top--; | |
268 | ||
269 | return entity; | |
270 | } | |
271 | ||
a5ccc48a SA |
272 | #define link_top(en) ((en)->stack[(en)->top].link) |
273 | #define stack_top(en) ((en)->stack[(en)->top].entity) | |
274 | ||
e03d2203 | 275 | /** |
20b85227 | 276 | * media_graph_walk_init - Allocate resources for graph walk |
e03d2203 SA |
277 | * @graph: Media graph structure that will be used to walk the graph |
278 | * @mdev: Media device | |
279 | * | |
280 | * Reserve resources for graph walk in media device's current | |
281 | * state. The memory must be released using | |
20b85227 | 282 | * media_graph_walk_free(). |
e03d2203 SA |
283 | * |
284 | * Returns error on failure, zero on success. | |
285 | */ | |
20b85227 SA |
286 | __must_check int media_graph_walk_init( |
287 | struct media_graph *graph, struct media_device *mdev) | |
e03d2203 | 288 | { |
29d8da02 | 289 | return media_entity_enum_init(&graph->ent_enum, mdev); |
e03d2203 | 290 | } |
20b85227 | 291 | EXPORT_SYMBOL_GPL(media_graph_walk_init); |
e03d2203 SA |
292 | |
293 | /** | |
20b85227 | 294 | * media_graph_walk_cleanup - Release resources related to graph walking |
e03d2203 SA |
295 | * @graph: Media graph structure that was used to walk the graph |
296 | */ | |
20b85227 | 297 | void media_graph_walk_cleanup(struct media_graph *graph) |
e03d2203 | 298 | { |
29d8da02 | 299 | media_entity_enum_cleanup(&graph->ent_enum); |
e03d2203 | 300 | } |
20b85227 | 301 | EXPORT_SYMBOL_GPL(media_graph_walk_cleanup); |
e03d2203 | 302 | |
20b85227 SA |
303 | void media_graph_walk_start(struct media_graph *graph, |
304 | struct media_entity *entity) | |
a5ccc48a | 305 | { |
29d8da02 SA |
306 | media_entity_enum_zero(&graph->ent_enum); |
307 | media_entity_enum_set(&graph->ent_enum, entity); | |
308 | ||
a5ccc48a SA |
309 | graph->top = 0; |
310 | graph->stack[graph->top].entity = NULL; | |
311 | stack_push(graph, entity); | |
aa79a84f SA |
312 | dev_dbg(entity->graph_obj.mdev->dev, |
313 | "begin graph walk at '%s'\n", entity->name); | |
a5ccc48a | 314 | } |
20b85227 | 315 | EXPORT_SYMBOL_GPL(media_graph_walk_start); |
a5ccc48a | 316 | |
5b1f8329 SA |
317 | static void media_graph_walk_iter(struct media_graph *graph) |
318 | { | |
319 | struct media_entity *entity = stack_top(graph); | |
320 | struct media_link *link; | |
321 | struct media_entity *next; | |
322 | ||
323 | link = list_entry(link_top(graph), typeof(*link), list); | |
324 | ||
325 | /* The link is not enabled so we do not follow. */ | |
326 | if (!(link->flags & MEDIA_LNK_FL_ENABLED)) { | |
327 | link_top(graph) = link_top(graph)->next; | |
aa79a84f SA |
328 | dev_dbg(entity->graph_obj.mdev->dev, |
329 | "walk: skipping disabled link '%s':%u -> '%s':%u\n", | |
330 | link->source->entity->name, link->source->index, | |
331 | link->sink->entity->name, link->sink->index); | |
5b1f8329 SA |
332 | return; |
333 | } | |
334 | ||
335 | /* Get the entity in the other end of the link . */ | |
336 | next = media_entity_other(entity, link); | |
337 | ||
338 | /* Has the entity already been visited? */ | |
339 | if (media_entity_enum_test_and_set(&graph->ent_enum, next)) { | |
340 | link_top(graph) = link_top(graph)->next; | |
aa79a84f SA |
341 | dev_dbg(entity->graph_obj.mdev->dev, |
342 | "walk: skipping entity '%s' (already seen)\n", | |
343 | next->name); | |
5b1f8329 SA |
344 | return; |
345 | } | |
346 | ||
347 | /* Push the new entity to stack and start over. */ | |
348 | link_top(graph) = link_top(graph)->next; | |
349 | stack_push(graph, next); | |
aa79a84f SA |
350 | dev_dbg(entity->graph_obj.mdev->dev, "walk: pushing '%s' on stack\n", |
351 | next->name); | |
5b1f8329 SA |
352 | } |
353 | ||
20b85227 | 354 | struct media_entity *media_graph_walk_next(struct media_graph *graph) |
a5ccc48a | 355 | { |
aa79a84f SA |
356 | struct media_entity *entity; |
357 | ||
a5ccc48a SA |
358 | if (stack_top(graph) == NULL) |
359 | return NULL; | |
360 | ||
361 | /* | |
362 | * Depth first search. Push entity to stack and continue from | |
363 | * top of the stack until no more entities on the level can be | |
364 | * found. | |
365 | */ | |
5b1f8329 SA |
366 | while (link_top(graph) != &stack_top(graph)->links) |
367 | media_graph_walk_iter(graph); | |
a5ccc48a | 368 | |
aa79a84f SA |
369 | entity = stack_pop(graph); |
370 | dev_dbg(entity->graph_obj.mdev->dev, | |
371 | "walk: returning entity '%s'\n", entity->name); | |
372 | ||
373 | return entity; | |
a5ccc48a | 374 | } |
20b85227 | 375 | EXPORT_SYMBOL_GPL(media_graph_walk_next); |
a5ccc48a | 376 | |
d295c6a4 NS |
377 | int media_entity_get_fwnode_pad(struct media_entity *entity, |
378 | struct fwnode_handle *fwnode, | |
379 | unsigned long direction_flags) | |
380 | { | |
381 | struct fwnode_endpoint endpoint; | |
382 | unsigned int i; | |
383 | int ret; | |
384 | ||
385 | if (!entity->ops || !entity->ops->get_fwnode_pad) { | |
386 | for (i = 0; i < entity->num_pads; i++) { | |
387 | if (entity->pads[i].flags & direction_flags) | |
388 | return i; | |
389 | } | |
390 | ||
391 | return -ENXIO; | |
392 | } | |
393 | ||
394 | ret = fwnode_graph_parse_endpoint(fwnode, &endpoint); | |
395 | if (ret) | |
396 | return ret; | |
397 | ||
398 | ret = entity->ops->get_fwnode_pad(&endpoint); | |
399 | if (ret < 0) | |
400 | return ret; | |
401 | ||
402 | if (ret >= entity->num_pads) | |
403 | return -ENXIO; | |
404 | ||
405 | if (!(entity->pads[ret].flags & direction_flags)) | |
406 | return -ENXIO; | |
407 | ||
408 | return ret; | |
409 | } | |
410 | EXPORT_SYMBOL_GPL(media_entity_get_fwnode_pad); | |
411 | ||
e02188c9 LP |
412 | /* ----------------------------------------------------------------------------- |
413 | * Pipeline management | |
414 | */ | |
415 | ||
20b85227 SA |
416 | __must_check int __media_pipeline_start(struct media_entity *entity, |
417 | struct media_pipeline *pipe) | |
e02188c9 | 418 | { |
d10c9894 | 419 | struct media_device *mdev = entity->graph_obj.mdev; |
20b85227 | 420 | struct media_graph *graph = &pipe->graph; |
af88be38 | 421 | struct media_entity *entity_err = entity; |
57208e5e | 422 | struct media_link *link; |
af88be38 | 423 | int ret; |
e02188c9 | 424 | |
74a41330 | 425 | if (!pipe->streaming_count++) { |
20b85227 | 426 | ret = media_graph_walk_init(&pipe->graph, mdev); |
74a41330 SA |
427 | if (ret) |
428 | goto error_graph_walk_start; | |
106b9907 SA |
429 | } |
430 | ||
20b85227 | 431 | media_graph_walk_start(&pipe->graph, entity); |
e02188c9 | 432 | |
20b85227 | 433 | while ((entity = media_graph_walk_next(graph))) { |
ef69ee1b MCC |
434 | DECLARE_BITMAP(active, MEDIA_ENTITY_MAX_PADS); |
435 | DECLARE_BITMAP(has_no_links, MEDIA_ENTITY_MAX_PADS); | |
af88be38 | 436 | |
e02188c9 | 437 | entity->stream_count++; |
8aaf62b5 SA |
438 | |
439 | if (WARN_ON(entity->pipe && entity->pipe != pipe)) { | |
440 | ret = -EBUSY; | |
441 | goto error; | |
442 | } | |
443 | ||
e02188c9 | 444 | entity->pipe = pipe; |
af88be38 SA |
445 | |
446 | /* Already streaming --- no need to check. */ | |
447 | if (entity->stream_count > 1) | |
448 | continue; | |
449 | ||
450 | if (!entity->ops || !entity->ops->link_validate) | |
451 | continue; | |
452 | ||
de49c285 SA |
453 | bitmap_zero(active, entity->num_pads); |
454 | bitmap_fill(has_no_links, entity->num_pads); | |
455 | ||
57208e5e | 456 | list_for_each_entry(link, &entity->links, list) { |
de49c285 SA |
457 | struct media_pad *pad = link->sink->entity == entity |
458 | ? link->sink : link->source; | |
459 | ||
460 | /* Mark that a pad is connected by a link. */ | |
461 | bitmap_clear(has_no_links, pad->index, 1); | |
462 | ||
463 | /* | |
464 | * Pads that either do not need to connect or | |
465 | * are connected through an enabled link are | |
466 | * fine. | |
467 | */ | |
468 | if (!(pad->flags & MEDIA_PAD_FL_MUST_CONNECT) || | |
469 | link->flags & MEDIA_LNK_FL_ENABLED) | |
470 | bitmap_set(active, pad->index, 1); | |
471 | ||
472 | /* | |
473 | * Link validation will only take place for | |
474 | * sink ends of the link that are enabled. | |
475 | */ | |
476 | if (link->sink != pad || | |
477 | !(link->flags & MEDIA_LNK_FL_ENABLED)) | |
af88be38 SA |
478 | continue; |
479 | ||
480 | ret = entity->ops->link_validate(link); | |
fab9d30b | 481 | if (ret < 0 && ret != -ENOIOCTLCMD) { |
d10c9894 | 482 | dev_dbg(entity->graph_obj.mdev->dev, |
91b619ad | 483 | "link validation failed for '%s':%u -> '%s':%u, error %d\n", |
823ea2a6 SA |
484 | link->source->entity->name, |
485 | link->source->index, | |
486 | entity->name, link->sink->index, ret); | |
af88be38 | 487 | goto error; |
fab9d30b | 488 | } |
af88be38 | 489 | } |
de49c285 SA |
490 | |
491 | /* Either no links or validated links are fine. */ | |
492 | bitmap_or(active, active, has_no_links, entity->num_pads); | |
493 | ||
494 | if (!bitmap_full(active, entity->num_pads)) { | |
47dfdb3a | 495 | ret = -ENOLINK; |
d10c9894 | 496 | dev_dbg(entity->graph_obj.mdev->dev, |
91b619ad | 497 | "'%s':%u must be connected by an enabled link\n", |
fab9d30b | 498 | entity->name, |
094f1ca5 SA |
499 | (unsigned)find_first_zero_bit( |
500 | active, entity->num_pads)); | |
de49c285 SA |
501 | goto error; |
502 | } | |
e02188c9 LP |
503 | } |
504 | ||
af88be38 SA |
505 | return 0; |
506 | ||
507 | error: | |
508 | /* | |
509 | * Link validation on graph failed. We revert what we did and | |
510 | * return the error. | |
511 | */ | |
20b85227 | 512 | media_graph_walk_start(graph, entity_err); |
af88be38 | 513 | |
20b85227 | 514 | while ((entity_err = media_graph_walk_next(graph))) { |
12030f48 SA |
515 | /* Sanity check for negative stream_count */ |
516 | if (!WARN_ON_ONCE(entity_err->stream_count <= 0)) { | |
3801bc7d SK |
517 | entity_err->stream_count--; |
518 | if (entity_err->stream_count == 0) | |
519 | entity_err->pipe = NULL; | |
520 | } | |
af88be38 SA |
521 | |
522 | /* | |
523 | * We haven't increased stream_count further than this | |
524 | * so we quit here. | |
525 | */ | |
526 | if (entity_err == entity) | |
527 | break; | |
528 | } | |
529 | ||
74a41330 SA |
530 | error_graph_walk_start: |
531 | if (!--pipe->streaming_count) | |
20b85227 | 532 | media_graph_walk_cleanup(graph); |
106b9907 | 533 | |
fb49f204 SK |
534 | return ret; |
535 | } | |
20b85227 | 536 | EXPORT_SYMBOL_GPL(__media_pipeline_start); |
af88be38 | 537 | |
20b85227 SA |
538 | __must_check int media_pipeline_start(struct media_entity *entity, |
539 | struct media_pipeline *pipe) | |
fb49f204 SK |
540 | { |
541 | struct media_device *mdev = entity->graph_obj.mdev; | |
542 | int ret; | |
543 | ||
544 | mutex_lock(&mdev->graph_mutex); | |
20b85227 | 545 | ret = __media_pipeline_start(entity, pipe); |
fb49f204 | 546 | mutex_unlock(&mdev->graph_mutex); |
af88be38 | 547 | return ret; |
e02188c9 | 548 | } |
20b85227 | 549 | EXPORT_SYMBOL_GPL(media_pipeline_start); |
e02188c9 | 550 | |
20b85227 | 551 | void __media_pipeline_stop(struct media_entity *entity) |
e02188c9 | 552 | { |
20b85227 | 553 | struct media_graph *graph = &entity->pipe->graph; |
74a41330 | 554 | struct media_pipeline *pipe = entity->pipe; |
e02188c9 | 555 | |
2a2599c6 KB |
556 | /* |
557 | * If the following check fails, the driver has performed an | |
558 | * unbalanced call to media_pipeline_stop() | |
559 | */ | |
560 | if (WARN_ON(!pipe)) | |
561 | return; | |
e02188c9 | 562 | |
20b85227 | 563 | media_graph_walk_start(graph, entity); |
e02188c9 | 564 | |
20b85227 | 565 | while ((entity = media_graph_walk_next(graph))) { |
12030f48 SA |
566 | /* Sanity check for negative stream_count */ |
567 | if (!WARN_ON_ONCE(entity->stream_count <= 0)) { | |
3801bc7d SK |
568 | entity->stream_count--; |
569 | if (entity->stream_count == 0) | |
570 | entity->pipe = NULL; | |
571 | } | |
e02188c9 LP |
572 | } |
573 | ||
74a41330 | 574 | if (!--pipe->streaming_count) |
20b85227 | 575 | media_graph_walk_cleanup(graph); |
106b9907 | 576 | |
fb49f204 | 577 | } |
20b85227 | 578 | EXPORT_SYMBOL_GPL(__media_pipeline_stop); |
fb49f204 | 579 | |
20b85227 | 580 | void media_pipeline_stop(struct media_entity *entity) |
fb49f204 SK |
581 | { |
582 | struct media_device *mdev = entity->graph_obj.mdev; | |
583 | ||
584 | mutex_lock(&mdev->graph_mutex); | |
20b85227 | 585 | __media_pipeline_stop(entity); |
e02188c9 LP |
586 | mutex_unlock(&mdev->graph_mutex); |
587 | } | |
20b85227 | 588 | EXPORT_SYMBOL_GPL(media_pipeline_stop); |
e02188c9 | 589 | |
503c3d82 LP |
590 | /* ----------------------------------------------------------------------------- |
591 | * Module use count | |
592 | */ | |
593 | ||
503c3d82 LP |
594 | struct media_entity *media_entity_get(struct media_entity *entity) |
595 | { | |
596 | if (entity == NULL) | |
597 | return NULL; | |
598 | ||
d10c9894 JMC |
599 | if (entity->graph_obj.mdev->dev && |
600 | !try_module_get(entity->graph_obj.mdev->dev->driver->owner)) | |
503c3d82 LP |
601 | return NULL; |
602 | ||
603 | return entity; | |
604 | } | |
605 | EXPORT_SYMBOL_GPL(media_entity_get); | |
606 | ||
503c3d82 LP |
607 | void media_entity_put(struct media_entity *entity) |
608 | { | |
609 | if (entity == NULL) | |
610 | return; | |
611 | ||
d10c9894 JMC |
612 | if (entity->graph_obj.mdev->dev) |
613 | module_put(entity->graph_obj.mdev->dev->driver->owner); | |
503c3d82 LP |
614 | } |
615 | EXPORT_SYMBOL_GPL(media_entity_put); | |
616 | ||
a5ccc48a SA |
617 | /* ----------------------------------------------------------------------------- |
618 | * Links management | |
619 | */ | |
620 | ||
23615de5 | 621 | static struct media_link *media_add_link(struct list_head *head) |
53e269c1 | 622 | { |
57208e5e | 623 | struct media_link *link; |
53e269c1 | 624 | |
57208e5e MCC |
625 | link = kzalloc(sizeof(*link), GFP_KERNEL); |
626 | if (link == NULL) | |
627 | return NULL; | |
53e269c1 | 628 | |
23615de5 | 629 | list_add_tail(&link->list, head); |
53e269c1 | 630 | |
57208e5e | 631 | return link; |
53e269c1 LP |
632 | } |
633 | ||
57208e5e | 634 | static void __media_entity_remove_link(struct media_entity *entity, |
5abad22f MCC |
635 | struct media_link *link) |
636 | { | |
637 | struct media_link *rlink, *tmp; | |
638 | struct media_entity *remote; | |
5abad22f MCC |
639 | |
640 | if (link->source->entity == entity) | |
641 | remote = link->sink->entity; | |
642 | else | |
643 | remote = link->source->entity; | |
644 | ||
645 | list_for_each_entry_safe(rlink, tmp, &remote->links, list) { | |
58f69ee9 | 646 | if (rlink != link->reverse) |
5abad22f | 647 | continue; |
5abad22f MCC |
648 | |
649 | if (link->source->entity == entity) | |
650 | remote->num_backlinks--; | |
651 | ||
652 | /* Remove the remote link */ | |
653 | list_del(&rlink->list); | |
c350ef83 | 654 | media_gobj_destroy(&rlink->graph_obj); |
5abad22f MCC |
655 | kfree(rlink); |
656 | ||
657 | if (--remote->num_links == 0) | |
658 | break; | |
659 | } | |
660 | list_del(&link->list); | |
c350ef83 | 661 | media_gobj_destroy(&link->graph_obj); |
5abad22f MCC |
662 | kfree(link); |
663 | } | |
57208e5e | 664 | |
9d6d20e6 MCC |
665 | int media_get_pad_index(struct media_entity *entity, bool is_sink, |
666 | enum media_pad_signal_type sig_type) | |
667 | { | |
668 | int i; | |
669 | bool pad_is_sink; | |
670 | ||
671 | if (!entity) | |
672 | return -EINVAL; | |
673 | ||
674 | for (i = 0; i < entity->num_pads; i++) { | |
675 | if (entity->pads[i].flags == MEDIA_PAD_FL_SINK) | |
676 | pad_is_sink = true; | |
677 | else if (entity->pads[i].flags == MEDIA_PAD_FL_SOURCE) | |
678 | pad_is_sink = false; | |
679 | else | |
680 | continue; /* This is an error! */ | |
681 | ||
682 | if (pad_is_sink != is_sink) | |
683 | continue; | |
684 | if (entity->pads[i].sig_type == sig_type) | |
685 | return i; | |
686 | } | |
687 | return -EINVAL; | |
688 | } | |
689 | EXPORT_SYMBOL_GPL(media_get_pad_index); | |
690 | ||
53e269c1 | 691 | int |
8df00a15 | 692 | media_create_pad_link(struct media_entity *source, u16 source_pad, |
53e269c1 LP |
693 | struct media_entity *sink, u16 sink_pad, u32 flags) |
694 | { | |
695 | struct media_link *link; | |
696 | struct media_link *backlink; | |
697 | ||
698 | BUG_ON(source == NULL || sink == NULL); | |
699 | BUG_ON(source_pad >= source->num_pads); | |
700 | BUG_ON(sink_pad >= sink->num_pads); | |
701 | ||
23615de5 | 702 | link = media_add_link(&source->links); |
53e269c1 LP |
703 | if (link == NULL) |
704 | return -ENOMEM; | |
705 | ||
706 | link->source = &source->pads[source_pad]; | |
707 | link->sink = &sink->pads[sink_pad]; | |
82ae2a50 | 708 | link->flags = flags & ~MEDIA_LNK_FL_INTERFACE_LINK; |
53e269c1 | 709 | |
6b6a4278 | 710 | /* Initialize graph object embedded at the new link */ |
c350ef83 | 711 | media_gobj_create(source->graph_obj.mdev, MEDIA_GRAPH_LINK, |
d10c9894 | 712 | &link->graph_obj); |
6b6a4278 | 713 | |
53e269c1 LP |
714 | /* Create the backlink. Backlinks are used to help graph traversal and |
715 | * are not reported to userspace. | |
716 | */ | |
23615de5 | 717 | backlink = media_add_link(&sink->links); |
53e269c1 | 718 | if (backlink == NULL) { |
57208e5e | 719 | __media_entity_remove_link(source, link); |
53e269c1 LP |
720 | return -ENOMEM; |
721 | } | |
722 | ||
723 | backlink->source = &source->pads[source_pad]; | |
724 | backlink->sink = &sink->pads[sink_pad]; | |
725 | backlink->flags = flags; | |
39d1ebc6 | 726 | backlink->is_backlink = true; |
53e269c1 | 727 | |
6b6a4278 | 728 | /* Initialize graph object embedded at the new link */ |
c350ef83 | 729 | media_gobj_create(sink->graph_obj.mdev, MEDIA_GRAPH_LINK, |
d10c9894 | 730 | &backlink->graph_obj); |
6b6a4278 | 731 | |
53e269c1 LP |
732 | link->reverse = backlink; |
733 | backlink->reverse = link; | |
734 | ||
735 | sink->num_backlinks++; | |
57208e5e MCC |
736 | sink->num_links++; |
737 | source->num_links++; | |
53e269c1 LP |
738 | |
739 | return 0; | |
740 | } | |
8df00a15 | 741 | EXPORT_SYMBOL_GPL(media_create_pad_link); |
97548ed4 | 742 | |
b01cc9ce MCC |
743 | int media_create_pad_links(const struct media_device *mdev, |
744 | const u32 source_function, | |
745 | struct media_entity *source, | |
746 | const u16 source_pad, | |
747 | const u32 sink_function, | |
748 | struct media_entity *sink, | |
749 | const u16 sink_pad, | |
750 | u32 flags, | |
751 | const bool allow_both_undefined) | |
752 | { | |
753 | struct media_entity *entity; | |
754 | unsigned function; | |
755 | int ret; | |
756 | ||
757 | /* Trivial case: 1:1 relation */ | |
758 | if (source && sink) | |
759 | return media_create_pad_link(source, source_pad, | |
760 | sink, sink_pad, flags); | |
761 | ||
762 | /* Worse case scenario: n:n relation */ | |
763 | if (!source && !sink) { | |
764 | if (!allow_both_undefined) | |
765 | return 0; | |
766 | media_device_for_each_entity(source, mdev) { | |
767 | if (source->function != source_function) | |
768 | continue; | |
769 | media_device_for_each_entity(sink, mdev) { | |
770 | if (sink->function != sink_function) | |
771 | continue; | |
772 | ret = media_create_pad_link(source, source_pad, | |
773 | sink, sink_pad, | |
774 | flags); | |
775 | if (ret) | |
776 | return ret; | |
777 | flags &= ~(MEDIA_LNK_FL_ENABLED | | |
778 | MEDIA_LNK_FL_IMMUTABLE); | |
779 | } | |
780 | } | |
781 | return 0; | |
782 | } | |
783 | ||
784 | /* Handle 1:n and n:1 cases */ | |
785 | if (source) | |
786 | function = sink_function; | |
787 | else | |
788 | function = source_function; | |
789 | ||
790 | media_device_for_each_entity(entity, mdev) { | |
791 | if (entity->function != function) | |
792 | continue; | |
793 | ||
794 | if (source) | |
795 | ret = media_create_pad_link(source, source_pad, | |
796 | entity, sink_pad, flags); | |
797 | else | |
798 | ret = media_create_pad_link(entity, source_pad, | |
799 | sink, sink_pad, flags); | |
800 | if (ret) | |
801 | return ret; | |
802 | flags &= ~(MEDIA_LNK_FL_ENABLED | MEDIA_LNK_FL_IMMUTABLE); | |
803 | } | |
804 | return 0; | |
805 | } | |
806 | EXPORT_SYMBOL_GPL(media_create_pad_links); | |
807 | ||
57208e5e MCC |
808 | void __media_entity_remove_links(struct media_entity *entity) |
809 | { | |
810 | struct media_link *link, *tmp; | |
7349cec1 | 811 | |
57208e5e MCC |
812 | list_for_each_entry_safe(link, tmp, &entity->links, list) |
813 | __media_entity_remove_link(entity, link); | |
7349cec1 SN |
814 | |
815 | entity->num_links = 0; | |
816 | entity->num_backlinks = 0; | |
817 | } | |
818 | EXPORT_SYMBOL_GPL(__media_entity_remove_links); | |
819 | ||
820 | void media_entity_remove_links(struct media_entity *entity) | |
821 | { | |
cc4a8258 MCC |
822 | struct media_device *mdev = entity->graph_obj.mdev; |
823 | ||
7349cec1 | 824 | /* Do nothing if the entity is not registered. */ |
cc4a8258 | 825 | if (mdev == NULL) |
7349cec1 SN |
826 | return; |
827 | ||
e2c91d4d | 828 | mutex_lock(&mdev->graph_mutex); |
7349cec1 | 829 | __media_entity_remove_links(entity); |
e2c91d4d | 830 | mutex_unlock(&mdev->graph_mutex); |
7349cec1 SN |
831 | } |
832 | EXPORT_SYMBOL_GPL(media_entity_remove_links); | |
833 | ||
97548ed4 LP |
834 | static int __media_entity_setup_link_notify(struct media_link *link, u32 flags) |
835 | { | |
97548ed4 LP |
836 | int ret; |
837 | ||
838 | /* Notify both entities. */ | |
839 | ret = media_entity_call(link->source->entity, link_setup, | |
840 | link->source, link->sink, flags); | |
841 | if (ret < 0 && ret != -ENOIOCTLCMD) | |
842 | return ret; | |
843 | ||
844 | ret = media_entity_call(link->sink->entity, link_setup, | |
845 | link->sink, link->source, flags); | |
846 | if (ret < 0 && ret != -ENOIOCTLCMD) { | |
847 | media_entity_call(link->source->entity, link_setup, | |
848 | link->source, link->sink, link->flags); | |
849 | return ret; | |
850 | } | |
851 | ||
7a6f0b22 | 852 | link->flags = flags; |
97548ed4 LP |
853 | link->reverse->flags = link->flags; |
854 | ||
855 | return 0; | |
856 | } | |
857 | ||
97548ed4 LP |
858 | int __media_entity_setup_link(struct media_link *link, u32 flags) |
859 | { | |
7a6f0b22 | 860 | const u32 mask = MEDIA_LNK_FL_ENABLED; |
97548ed4 LP |
861 | struct media_device *mdev; |
862 | struct media_entity *source, *sink; | |
863 | int ret = -EBUSY; | |
864 | ||
865 | if (link == NULL) | |
866 | return -EINVAL; | |
867 | ||
7a6f0b22 LP |
868 | /* The non-modifiable link flags must not be modified. */ |
869 | if ((link->flags & ~mask) != (flags & ~mask)) | |
870 | return -EINVAL; | |
871 | ||
97548ed4 LP |
872 | if (link->flags & MEDIA_LNK_FL_IMMUTABLE) |
873 | return link->flags == flags ? 0 : -EINVAL; | |
874 | ||
875 | if (link->flags == flags) | |
876 | return 0; | |
877 | ||
878 | source = link->source->entity; | |
879 | sink = link->sink->entity; | |
880 | ||
e02188c9 LP |
881 | if (!(link->flags & MEDIA_LNK_FL_DYNAMIC) && |
882 | (source->stream_count || sink->stream_count)) | |
883 | return -EBUSY; | |
884 | ||
d10c9894 | 885 | mdev = source->graph_obj.mdev; |
97548ed4 | 886 | |
68429f50 LP |
887 | if (mdev->ops && mdev->ops->link_notify) { |
888 | ret = mdev->ops->link_notify(link, flags, | |
889 | MEDIA_DEV_NOTIFY_PRE_LINK_CH); | |
97548ed4 LP |
890 | if (ret < 0) |
891 | return ret; | |
892 | } | |
893 | ||
894 | ret = __media_entity_setup_link_notify(link, flags); | |
97548ed4 | 895 | |
68429f50 LP |
896 | if (mdev->ops && mdev->ops->link_notify) |
897 | mdev->ops->link_notify(link, flags, | |
898 | MEDIA_DEV_NOTIFY_POST_LINK_CH); | |
97548ed4 LP |
899 | |
900 | return ret; | |
901 | } | |
efc70278 | 902 | EXPORT_SYMBOL_GPL(__media_entity_setup_link); |
97548ed4 LP |
903 | |
904 | int media_entity_setup_link(struct media_link *link, u32 flags) | |
905 | { | |
906 | int ret; | |
907 | ||
5c883edb | 908 | mutex_lock(&link->graph_obj.mdev->graph_mutex); |
97548ed4 | 909 | ret = __media_entity_setup_link(link, flags); |
5c883edb | 910 | mutex_unlock(&link->graph_obj.mdev->graph_mutex); |
97548ed4 LP |
911 | |
912 | return ret; | |
913 | } | |
914 | EXPORT_SYMBOL_GPL(media_entity_setup_link); | |
915 | ||
97548ed4 LP |
916 | struct media_link * |
917 | media_entity_find_link(struct media_pad *source, struct media_pad *sink) | |
918 | { | |
919 | struct media_link *link; | |
97548ed4 | 920 | |
57208e5e | 921 | list_for_each_entry(link, &source->entity->links, list) { |
97548ed4 LP |
922 | if (link->source->entity == source->entity && |
923 | link->source->index == source->index && | |
924 | link->sink->entity == sink->entity && | |
925 | link->sink->index == sink->index) | |
926 | return link; | |
927 | } | |
928 | ||
929 | return NULL; | |
930 | } | |
931 | EXPORT_SYMBOL_GPL(media_entity_find_link); | |
932 | ||
6538b02d | 933 | struct media_pad *media_entity_remote_pad(const struct media_pad *pad) |
97548ed4 | 934 | { |
57208e5e | 935 | struct media_link *link; |
97548ed4 | 936 | |
57208e5e | 937 | list_for_each_entry(link, &pad->entity->links, list) { |
97548ed4 LP |
938 | if (!(link->flags & MEDIA_LNK_FL_ENABLED)) |
939 | continue; | |
940 | ||
941 | if (link->source == pad) | |
942 | return link->sink; | |
943 | ||
944 | if (link->sink == pad) | |
945 | return link->source; | |
946 | } | |
947 | ||
948 | return NULL; | |
949 | ||
950 | } | |
1bddf1b3 | 951 | EXPORT_SYMBOL_GPL(media_entity_remote_pad); |
27e543fa | 952 | |
1283f849 MCC |
953 | static void media_interface_init(struct media_device *mdev, |
954 | struct media_interface *intf, | |
955 | u32 gobj_type, | |
956 | u32 intf_type, u32 flags) | |
957 | { | |
958 | intf->type = intf_type; | |
959 | intf->flags = flags; | |
960 | INIT_LIST_HEAD(&intf->links); | |
961 | ||
c350ef83 | 962 | media_gobj_create(mdev, gobj_type, &intf->graph_obj); |
1283f849 MCC |
963 | } |
964 | ||
27e543fa MCC |
965 | /* Functions related to the media interface via device nodes */ |
966 | ||
967 | struct media_intf_devnode *media_devnode_create(struct media_device *mdev, | |
968 | u32 type, u32 flags, | |
0b3b72df | 969 | u32 major, u32 minor) |
27e543fa MCC |
970 | { |
971 | struct media_intf_devnode *devnode; | |
27e543fa | 972 | |
0b3b72df | 973 | devnode = kzalloc(sizeof(*devnode), GFP_KERNEL); |
27e543fa MCC |
974 | if (!devnode) |
975 | return NULL; | |
976 | ||
27e543fa MCC |
977 | devnode->major = major; |
978 | devnode->minor = minor; | |
979 | ||
1283f849 MCC |
980 | media_interface_init(mdev, &devnode->intf, MEDIA_GRAPH_INTF_DEVNODE, |
981 | type, flags); | |
27e543fa MCC |
982 | |
983 | return devnode; | |
984 | } | |
985 | EXPORT_SYMBOL_GPL(media_devnode_create); | |
986 | ||
987 | void media_devnode_remove(struct media_intf_devnode *devnode) | |
988 | { | |
7c4696a9 | 989 | media_remove_intf_links(&devnode->intf); |
c350ef83 | 990 | media_gobj_destroy(&devnode->intf.graph_obj); |
27e543fa MCC |
991 | kfree(devnode); |
992 | } | |
993 | EXPORT_SYMBOL_GPL(media_devnode_remove); | |
86e26620 MCC |
994 | |
995 | struct media_link *media_create_intf_link(struct media_entity *entity, | |
996 | struct media_interface *intf, | |
997 | u32 flags) | |
998 | { | |
999 | struct media_link *link; | |
1000 | ||
1001 | link = media_add_link(&intf->links); | |
1002 | if (link == NULL) | |
1003 | return NULL; | |
1004 | ||
1005 | link->intf = intf; | |
1006 | link->entity = entity; | |
82ae2a50 | 1007 | link->flags = flags | MEDIA_LNK_FL_INTERFACE_LINK; |
86e26620 MCC |
1008 | |
1009 | /* Initialize graph object embedded at the new link */ | |
c350ef83 | 1010 | media_gobj_create(intf->graph_obj.mdev, MEDIA_GRAPH_LINK, |
86e26620 MCC |
1011 | &link->graph_obj); |
1012 | ||
1013 | return link; | |
1014 | } | |
1015 | EXPORT_SYMBOL_GPL(media_create_intf_link); | |
1016 | ||
d47109fa | 1017 | void __media_remove_intf_link(struct media_link *link) |
86e26620 | 1018 | { |
d47109fa | 1019 | list_del(&link->list); |
c350ef83 | 1020 | media_gobj_destroy(&link->graph_obj); |
86e26620 MCC |
1021 | kfree(link); |
1022 | } | |
d47109fa | 1023 | EXPORT_SYMBOL_GPL(__media_remove_intf_link); |
86e26620 MCC |
1024 | |
1025 | void media_remove_intf_link(struct media_link *link) | |
1026 | { | |
cc4a8258 MCC |
1027 | struct media_device *mdev = link->graph_obj.mdev; |
1028 | ||
1029 | /* Do nothing if the intf is not registered. */ | |
1030 | if (mdev == NULL) | |
1031 | return; | |
1032 | ||
e2c91d4d | 1033 | mutex_lock(&mdev->graph_mutex); |
86e26620 | 1034 | __media_remove_intf_link(link); |
e2c91d4d | 1035 | mutex_unlock(&mdev->graph_mutex); |
86e26620 MCC |
1036 | } |
1037 | EXPORT_SYMBOL_GPL(media_remove_intf_link); | |
7c4696a9 MCC |
1038 | |
1039 | void __media_remove_intf_links(struct media_interface *intf) | |
1040 | { | |
1041 | struct media_link *link, *tmp; | |
1042 | ||
1043 | list_for_each_entry_safe(link, tmp, &intf->links, list) | |
1044 | __media_remove_intf_link(link); | |
1045 | ||
1046 | } | |
1047 | EXPORT_SYMBOL_GPL(__media_remove_intf_links); | |
1048 | ||
1049 | void media_remove_intf_links(struct media_interface *intf) | |
1050 | { | |
cc4a8258 MCC |
1051 | struct media_device *mdev = intf->graph_obj.mdev; |
1052 | ||
7c4696a9 | 1053 | /* Do nothing if the intf is not registered. */ |
cc4a8258 | 1054 | if (mdev == NULL) |
7c4696a9 MCC |
1055 | return; |
1056 | ||
e2c91d4d | 1057 | mutex_lock(&mdev->graph_mutex); |
7c4696a9 | 1058 | __media_remove_intf_links(intf); |
e2c91d4d | 1059 | mutex_unlock(&mdev->graph_mutex); |
7c4696a9 MCC |
1060 | } |
1061 | EXPORT_SYMBOL_GPL(media_remove_intf_links); |