diff mbox series

[v11,09/36] media: entity: Add media_entity_has_route() function

Message ID 20220301161156.1119557-10-tomi.valkeinen@ideasonboard.com
State New
Headers show
Series v4l: routing and streams support | expand

Commit Message

Tomi Valkeinen March 1, 2022, 4:11 p.m. UTC 
From: Laurent Pinchart <laurent.pinchart@ideasonboard.com>

This is a wrapper around the media entity has_route operation.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Michal Simek <michal.simek@xilinx.com>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Jacopo Mondi <jacopo+renesas@jmondi.org>
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ideasonboard.com>
---
 drivers/media/mc/mc-entity.c | 32 ++++++++++++++++++++++++++++++++
 1 file changed, 32 insertions(+)
diff mbox series

Patch

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)
 {