From: Laurent Pinchart <laurent.pinchart@xxxxxxxxxxxxxxxx>
This is a wrapper around the media entity has_route operation.
Signed-off-by: Laurent Pinchart <laurent.pinchart@xxxxxxxxxxxxxxxx>
Signed-off-by: Michal Simek <michal.simek@xxxxxxxxxx>
Signed-off-by: Sakari Ailus <sakari.ailus@xxxxxxxxxxxxxxx>
Signed-off-by: Jacopo Mondi <jacopo+renesas@xxxxxxxxxx>
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@xxxxxxxxxxxxxxxx>
---
drivers/media/mc/mc-entity.c | 32 ++++++++++++++++++++++++++++++++
1 file changed, 32 insertions(+)
diff --git a/drivers/media/mc/mc-entity.c b/drivers/media/mc/mc-entity.c
index 0a5a9feb26b8..1ae9252b1b39 100644
--- a/drivers/media/mc/mc-entity.c
+++ b/drivers/media/mc/mc-entity.c
@@ -211,6 +211,38 @@ 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->graph_obj.mdev->mutex.
+ *
+ * Return: true if the pads are connected internally and false otherwise.
+ */
+static 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;
+
+ if (entity->pads[pad1].index < entity->pads[pad0].index)
+ swap(pad0, pad1);
+
+ return entity->ops->has_route(entity, pad0, pad1);
+}
+
static struct media_pad *
media_pad_other(struct media_pad *pad, struct media_link *link)
{
--
2.25.1
