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| author |   Steve Longerbeam <slongerbeam@gmail.com> | 2020-05-01 19:15:36 +0200 |
|---|---|---|
| committer |   Mauro Carvalho Chehab <mchehab+huawei@kernel.org> | 2020-05-18 11:12:52 +0200 |
| commit | 8fe784b9abb296124d0182eac35b96dbc29d049a (patch) | |
| tree | edfe3e69454373d9a5c021108f4e73630acc04e8 /drivers/media/v4l2-core | |
| parent | media: entity: Pass entity to get_fwnode_pad operation (diff) | |
| download | wireguard-linux-8fe784b9abb296124d0182eac35b96dbc29d049a.tar.xz wireguard-linux-8fe784b9abb296124d0182eac35b96dbc29d049a.zip | |
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>
Diffstat (limited to 'drivers/media/v4l2-core')
| -rw-r--r-- | drivers/media/v4l2-core/v4l2-subdev.c | 22 |
1 files changed, 22 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, |