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| author | Tomi Valkeinen <tomi.valkeinen@ideasonboard.com> | 2021-12-21 11:22:06 +0100 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab@kernel.org> | 2023-01-22 09:41:02 +0100 |
| commit | d00f1a075ce13c7d71ca00083be110877874a403 (patch) | |
| tree | 5cef1032c30e3b54b0c00edb8e23dec08ddbaecb /include/media | |
| parent | a6b995ed03ffeb36f06c4a46d8804c24d776de6f (diff) | |
| download | lwn-d00f1a075ce13c7d71ca00083be110877874a403.tar.gz lwn-d00f1a075ce13c7d71ca00083be110877874a403.zip | |
media: subdev: add "opposite" stream helper funcs
Add two helper functions to make dealing with streams easier:
v4l2_subdev_routing_find_opposite_end - given a routing table and a pad
+ stream, return the pad + stream on the opposite side of the subdev.
v4l2_subdev_state_get_opposite_stream_format - return a pointer to the
format on the pad + stream on the opposite side from the given pad +
stream.
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ideasonboard.com>
Reviewed-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Reviewed-by: Jacopo Mondi <jacopo@jmondi.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>
Diffstat (limited to 'include/media')
| -rw-r--r-- | include/media/v4l2-subdev.h | 36 |
1 files changed, 36 insertions, 0 deletions
diff --git a/include/media/v4l2-subdev.h b/include/media/v4l2-subdev.h index 643cdcd69ac6..cf8cbbf3b772 100644 --- a/include/media/v4l2-subdev.h +++ b/include/media/v4l2-subdev.h @@ -1532,6 +1532,42 @@ struct v4l2_rect * v4l2_subdev_state_get_stream_compose(struct v4l2_subdev_state *state, unsigned int pad, u32 stream); +/** + * v4l2_subdev_routing_find_opposite_end() - Find the opposite stream + * @routing: routing used to find the opposite side + * @pad: pad id + * @stream: stream id + * @other_pad: pointer used to return the opposite pad + * @other_stream: pointer used to return the opposite stream + * + * This function uses the routing table to find the pad + stream which is + * opposite the given pad + stream. + * + * @other_pad and/or @other_stream can be NULL if the caller does not need the + * value. + * + * Returns 0 on success, or -EINVAL if no matching route is found. + */ +int v4l2_subdev_routing_find_opposite_end(const struct v4l2_subdev_krouting *routing, + u32 pad, u32 stream, u32 *other_pad, + u32 *other_stream); + +/** + * v4l2_subdev_state_get_opposite_stream_format() - Get pointer to opposite + * stream format + * @state: subdevice state + * @pad: pad id + * @stream: stream id + * + * This returns a pointer to &struct v4l2_mbus_framefmt for the pad + stream + * that is opposite the given pad + stream in the subdev state. + * + * If the state does not contain the given pad + stream, NULL is returned. + */ +struct v4l2_mbus_framefmt * +v4l2_subdev_state_get_opposite_stream_format(struct v4l2_subdev_state *state, + u32 pad, u32 stream); + #endif /* CONFIG_VIDEO_V4L2_SUBDEV_API */ #endif /* CONFIG_MEDIA_CONTROLLER */ |