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authorSteve Longerbeam <slongerbeam@gmail.com>2020-05-01 19:15:36 +0200
committerMauro Carvalho Chehab <mchehab+huawei@kernel.org>2020-05-18 11:12:52 +0200
commit8fe784b9abb296124d0182eac35b96dbc29d049a (patch)
treeedfe3e69454373d9a5c021108f4e73630acc04e8
parent70d4a9efee9cdd580207473379e3ee64b331ae75 (diff)
media: v4l2-subdev: add v4l2_subdev_get_fwnode_pad_1_to_1
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@gmail.com> Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com> Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
-rw-r--r--drivers/media/v4l2-core/v4l2-subdev.c22
-rw-r--r--include/media/v4l2-subdev.h17
2 files changed, 39 insertions, 0 deletions
diff --git a/drivers/media/v4l2-core/v4l2-subdev.c b/drivers/media/v4l2-core/v4l2-subdev.c
index 665b0c0f74cf..6b989fe5a0a9 100644
--- a/drivers/media/v4l2-core/v4l2-subdev.c
+++ b/drivers/media/v4l2-core/v4l2-subdev.c
@@ -749,6 +749,28 @@ const struct v4l2_file_operations v4l2_subdev_fops = {
};
#ifdef CONFIG_MEDIA_CONTROLLER
+
+int v4l2_subdev_get_fwnode_pad_1_to_1(struct media_entity *entity,
+ struct fwnode_endpoint *endpoint)
+{
+ struct fwnode_handle *fwnode;
+ struct v4l2_subdev *sd;
+
+ if (!is_media_entity_v4l2_subdev(entity))
+ return -EINVAL;
+
+ sd = media_entity_to_v4l2_subdev(entity);
+
+ fwnode = fwnode_graph_get_port_parent(endpoint->local_fwnode);
+ fwnode_handle_put(fwnode);
+
+ if (dev_fwnode(sd->dev) == fwnode)
+ return endpoint->port;
+
+ return -ENXIO;
+}
+EXPORT_SYMBOL_GPL(v4l2_subdev_get_fwnode_pad_1_to_1);
+
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..f7fe78a6f65a 100644
--- a/include/media/v4l2-subdev.h
+++ b/include/media/v4l2-subdev.h
@@ -1028,6 +1028,23 @@ static inline void *v4l2_get_subdev_hostdata(const struct v4l2_subdev *sd)
#ifdef CONFIG_MEDIA_CONTROLLER
/**
+ * v4l2_subdev_get_fwnode_pad_1_to_1 - 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_1_to_1(struct media_entity *entity,
+ struct fwnode_endpoint *endpoint);
+
+/**
* v4l2_subdev_link_validate_default - validates a media link
*
* @sd: pointer to &struct v4l2_subdev