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| author | Laurent Pinchart <laurent.pinchart@ideasonboard.com> | 2022-01-18 00:51:23 +0100 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab@kernel.org> | 2023-01-22 09:45:28 +0100 |
| commit | c4a73f316d04594689dffcae8d800787e4fc9f75 (patch) | |
| tree | 97a91f8b24fb60887a4748927a1e34eac7f780d5 /include/media | |
| parent | 69c0fe7ae78b9ed696b5a5d8eaae7ca622c6f7ca (diff) | |
| download | linux-c4a73f316d04594689dffcae8d800787e4fc9f75.tar.gz | |
media: v4l2-subdev: Add v4l2_subdev_state_xlate_streams() helper
Add a helper function to translate streams between two pads of a subdev,
using the subdev's internal routing table.
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ideasonboard.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>
Diffstat (limited to 'include/media')
| -rw-r--r-- | include/media/v4l2-subdev.h | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/include/media/v4l2-subdev.h b/include/media/v4l2-subdev.h index 06c254f16b61..8ef0d26a7a06 100644 --- a/include/media/v4l2-subdev.h +++ b/include/media/v4l2-subdev.h @@ -1585,6 +1585,29 @@ v4l2_subdev_state_get_opposite_stream_format(struct v4l2_subdev_state *state, u32 pad, u32 stream); /** + * v4l2_subdev_state_xlate_streams() - Translate streams from one pad to another + * + * @state: Subdevice state + * @pad0: The first pad + * @pad1: The second pad + * @streams: Streams bitmask on the first pad + * + * Streams on sink pads of a subdev are routed to source pads as expressed in + * the subdev state routing table. Stream numbers don't necessarily match on + * the sink and source side of a route. This function translates stream numbers + * on @pad0, expressed as a bitmask in @streams, to the corresponding streams + * on @pad1 using the routing table from the @state. It returns the stream mask + * on @pad1, and updates @streams with the streams that have been found in the + * routing table. + * + * @pad0 and @pad1 must be a sink and a source, in any order. + * + * Return: The bitmask of streams of @pad1 that are routed to @streams on @pad0. + */ +u64 v4l2_subdev_state_xlate_streams(const struct v4l2_subdev_state *state, + u32 pad0, u32 pad1, u64 *streams); + +/** * enum v4l2_subdev_routing_restriction - Subdevice internal routing restrictions * * @V4L2_SUBDEV_ROUTING_NO_1_TO_N: |