This is a wrapper around the media entity get_fwnode_pad operation.
Signed-off-by: Niklas Söderlund <niklas.soderlund+renesas@xxxxxxxxxxxx>
---
drivers/media/media-entity.c | 35 +++++++++++++++++++++++++++++++++++
include/media/media-entity.h | 23 +++++++++++++++++++++++
2 files changed, 58 insertions(+)
diff --git a/drivers/media/media-entity.c b/drivers/media/media-entity.c
index bc44193efa4798b4..35a15263793f71e1 100644
--- a/drivers/media/media-entity.c
+++ b/drivers/media/media-entity.c
@@ -18,6 +18,7 @@
#include <linux/bitmap.h>
#include <linux/module.h>
+#include <linux/property.h>
#include <linux/slab.h>
#include <media/media-entity.h>
#include <media/media-device.h>
@@ -386,6 +387,40 @@ struct media_entity *media_graph_walk_next(struct media_graph *graph)
}
EXPORT_SYMBOL_GPL(media_graph_walk_next);
+int media_entity_get_fwnode_pad(struct media_entity *entity,
+ struct fwnode_handle *fwnode,
+ unsigned int direction)
+{
+ struct fwnode_endpoint endpoint;
+ int i, ret;
+
+ if (!entity->ops || !entity->ops->get_fwnode_pad) {
+ for (i = 0; i < entity->num_pads; i++) {
+ if (entity->pads[i].flags & direction)
+ return i;
+ }
+
+ return -ENXIO;
+ }
+
+ ret = fwnode_graph_parse_endpoint(fwnode, &endpoint);
+ if (ret)
+ return ret;
+
+ ret = entity->ops->get_fwnode_pad(&endpoint);
+ if (ret < 0)
+ return ret;
+
+ if (ret >= entity->num_pads)
+ return -ENXIO;
+
+ if (!(entity->pads[ret].flags & direction))
+ return -ENXIO;
+
+ return ret;
+}
+EXPORT_SYMBOL_GPL(media_entity_get_fwnode_pad);
+
/* -----------------------------------------------------------------------------
* Pipeline management
*/
diff --git a/include/media/media-entity.h b/include/media/media-entity.h
index 46eeb036aa330534..4114e06964824ec9 100644
--- a/include/media/media-entity.h
+++ b/include/media/media-entity.h
@@ -821,6 +821,29 @@ struct media_pad *media_entity_remote_pad(struct media_pad *pad);
struct media_entity *media_entity_get(struct media_entity *entity);
/**
+ * media_entity_get_fwnode_pad - Get pad number from fwnode
+ *
+ * @entity: The entity
+ * @fwnode: Pointer to the fwnode_handle which should be used to find the pad
+ * @direction: Expected direction of the pad, as defined in
+ * :ref:`include/uapi/linux/media.h <media_header>`
+ * (seek for ``MEDIA_PAD_FL_*``)
+ *
+ * This function can be used to resolve the media pad number from
+ * a fwnode. This is useful for devices which use more complex
+ * mappings of media pads.
+ *
+ * If the entity dose not implement the get_fwnode_pad() operation
+ * then this function searches the entity for the first pad that
+ * matches the @direction.
+ *
+ * Return: returns the pad number on success or a negative error code.
+ */
+int media_entity_get_fwnode_pad(struct media_entity *entity,
+ struct fwnode_handle *fwnode,
+ unsigned int direction);
+
+/**
* media_graph_walk_init - Allocate resources used by graph walk.
*
* @graph: Media graph structure that will be used to walk the graph
--
2.13.1
