diff options
Diffstat (limited to 'drivers/media/mc/mc-entity.c')
| -rw-r--r-- | drivers/media/mc/mc-entity.c | 39 |
1 files changed, 39 insertions, 0 deletions
diff --git a/drivers/media/mc/mc-entity.c b/drivers/media/mc/mc-entity.c index 66ba0629c4ce..767846b216c5 100644 --- a/drivers/media/mc/mc-entity.c +++ b/drivers/media/mc/mc-entity.c @@ -921,6 +921,45 @@ struct media_pad *media_pad_remote_pad_first(const struct media_pad *pad) } EXPORT_SYMBOL_GPL(media_pad_remote_pad_first); +struct media_pad * +media_entity_remote_pad_unique(const struct media_entity *entity, + unsigned int type) +{ + struct media_pad *pad = NULL; + struct media_link *link; + + list_for_each_entry(link, &entity->links, list) { + struct media_pad *local_pad; + struct media_pad *remote_pad; + + if (((link->flags & MEDIA_LNK_FL_LINK_TYPE) != + MEDIA_LNK_FL_DATA_LINK) || + !(link->flags & MEDIA_LNK_FL_ENABLED)) + continue; + + if (type == MEDIA_PAD_FL_SOURCE) { + local_pad = link->sink; + remote_pad = link->source; + } else { + local_pad = link->source; + remote_pad = link->sink; + } + + if (local_pad->entity == entity) { + if (pad) + return ERR_PTR(-ENOTUNIQ); + + pad = remote_pad; + } + } + + if (!pad) + return ERR_PTR(-ENOLINK); + + return pad; +} +EXPORT_SYMBOL_GPL(media_entity_remote_pad_unique); + static void media_interface_init(struct media_device *mdev, struct media_interface *intf, u32 gobj_type, |