Add a convenience function that can be used as the .get_fwnode_pad
operation for subdevices that map port numbers and pad indexes 1:1.
The function verifies the endpoint is owned by the subdevice, and if
so returns the endpoint port number.
Signed-off-by: Steve Longerbeam <slongerbeam@xxxxxxxxx>
---
drivers/media/v4l2-core/v4l2-subdev.c | 25 +++++++++++++++++++++++++
include/media/v4l2-subdev.h | 17 +++++++++++++++++
2 files changed, 42 insertions(+)
diff --git a/drivers/media/v4l2-core/v4l2-subdev.c b/drivers/media/v4l2-core/v4l2-subdev.c
index a376b351135f..d5b5cd7a6049 100644
--- a/drivers/media/v4l2-core/v4l2-subdev.c
+++ b/drivers/media/v4l2-core/v4l2-subdev.c
@@ -696,6 +696,31 @@ const struct v4l2_file_operations v4l2_subdev_fops = {
};
#ifdef CONFIG_MEDIA_CONTROLLER
+
+int v4l2_subdev_get_fwnode_pad_default(struct media_entity *entity,
+ struct fwnode_endpoint *endpoint)
+{
+ struct fwnode_handle *ep;
+ struct v4l2_subdev *sd;
+
+ if (!is_media_entity_v4l2_subdev(entity))
+ return -EINVAL;
+
+ sd = media_entity_to_v4l2_subdev(entity);
+
+ fwnode_graph_for_each_endpoint(dev_fwnode(sd->dev), ep) {
+ if (ep != endpoint->local_fwnode)
+ continue;
+
+ fwnode_handle_put(ep);
+
+ return endpoint->port;
+ }
+
+ return -ENXIO;
+}
+EXPORT_SYMBOL_GPL(v4l2_subdev_get_fwnode_pad_default);
+
int v4l2_subdev_link_validate_default(struct v4l2_subdev *sd,
struct media_link *link,
struct v4l2_subdev_format *source_fmt,
diff --git a/include/media/v4l2-subdev.h b/include/media/v4l2-subdev.h
index a4848de59852..940181323427 100644
--- a/include/media/v4l2-subdev.h
+++ b/include/media/v4l2-subdev.h
@@ -1027,6 +1027,23 @@ static inline void *v4l2_get_subdev_hostdata(const struct v4l2_subdev *sd)
#ifdef CONFIG_MEDIA_CONTROLLER
+/**
+ * v4l2_subdev_get_fwnode_pad_default - Get pad number from a subdev fwnode
+ * endpoint, assuming 1:1 port:pad
+ *
+ * @entity - Pointer to the subdev entity
+ * @endpoint - Pointer to a parsed fwnode endpoint
+ *
+ * This function can be used as the .get_fwnode_pad operation for
+ * subdevices that map port numbers and pad indexes 1:1. If the endpoint
+ * is owned by the subdevice, the function returns the endpoint port
+ * number.
+ *
+ * Returns the endpoint port number on success or a negative error code.
+ */
+int v4l2_subdev_get_fwnode_pad_default(struct media_entity *entity,
+ struct fwnode_endpoint *endpoint);
+
/**
* v4l2_subdev_link_validate_default - validates a media link
*
--
2.17.1
