From: Laurent Pinchart <laurent.pinch...@ideasonboard.com>
This is a wrapper around the media entity has_route operation.
Signed-off-by: Laurent Pinchart <laurent.pinch...@ideasonboard.com>
Signed-off-by: Michal Simek <michal.si...@xilinx.com>
Signed-off-by: Niklas Söderlund <niklas.soderlund+rene...@ragnatech.se>
---
drivers/media/media-entity.c | 29 +++++++++++++++++++++++++++++
include/media/media-entity.h | 3 +++
2 files changed, 32 insertions(+)
diff --git a/drivers/media/media-entity.c b/drivers/media/media-entity.c
index c68239e..4d03ea7 100644
--- a/drivers/media/media-entity.c
+++ b/drivers/media/media-entity.c
@@ -242,6 +242,35 @@ EXPORT_SYMBOL_GPL(media_entity_pads_init);
* Graph traversal
*/
+/**
+ * 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);
+
static struct media_entity *
media_entity_other(struct media_entity *entity, struct media_link *link)
{
diff --git a/include/media/media-entity.h b/include/media/media-entity.h
index 8f9fc85..5fb3f06 100644
--- a/include/media/media-entity.h
+++ b/include/media/media-entity.h
@@ -851,6 +851,9 @@ void media_entity_graph_walk_cleanup(struct
media_entity_graph *graph);
*/
void media_entity_put(struct media_entity *entity);
+bool media_entity_has_route(struct media_entity *entity, unsigned int sink,
+ unsigned int source);
+
/**
* media_entity_graph_walk_start - Start walking the media graph at a
* given entity
--
2.10.2
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