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| author | Steve Longerbeam <slongerbeam@gmail.com> | 2020-05-01 20:15:36 +0300 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab+huawei@kernel.org> | 2020-05-18 12:12:52 +0300 |
| commit | 8fe784b9abb296124d0182eac35b96dbc29d049a (patch) | |
| tree | edfe3e69454373d9a5c021108f4e73630acc04e8 | |
| parent | 70d4a9efee9cdd580207473379e3ee64b331ae75 (diff) | |
| download | linux-8fe784b9abb296124d0182eac35b96dbc29d049a.tar.xz | |
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.c | 22 | ||||
| -rw-r--r-- | include/media/v4l2-subdev.h | 17 |
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 |