diff options
Diffstat (limited to 'drivers/media/mc/mc-entity.c')
| -rw-r--r-- | drivers/media/mc/mc-entity.c | 31 |
1 files changed, 30 insertions, 1 deletions
diff --git a/drivers/media/mc/mc-entity.c b/drivers/media/mc/mc-entity.c index 668770e9f609..457dc215a224 100644 --- a/drivers/media/mc/mc-entity.c +++ b/drivers/media/mc/mc-entity.c @@ -264,7 +264,36 @@ static struct media_entity *stack_pop(struct media_graph *graph) #define stack_top(en) ((en)->stack[(en)->top].entity) /** - * media_graph_walk_init - Allocate resources for graph walk + * media_entity_has_route - Check if two entity pads are connected internally + * @entity: The entity + * @pad0: The first pad index + * @pad1: The second pad index + * + * This function can be used to check whether two pads of an entity are + * connected internally in the entity. + * + * The caller must hold entity->source->parent->mutex. + * + * Return: true if the pads are connected internally and false otherwise. + */ +bool media_entity_has_route(struct media_entity *entity, unsigned int pad0, + unsigned int pad1) +{ + if (pad0 >= entity->num_pads || pad1 >= entity->num_pads) + return false; + + if (pad0 == pad1) + return true; + + if (!entity->ops || !entity->ops->has_route) + return true; + + return entity->ops->has_route(entity, pad0, pad1); +} +EXPORT_SYMBOL_GPL(media_entity_has_route); + +/** + * media_entity_graph_walk_init - Allocate resources for graph walk * @graph: Media graph structure that will be used to walk the graph * @mdev: Media device * |