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| author | Laurent Pinchart <laurent.pinchart@ideasonboard.com> | 2021-12-21 13:23:58 +0300 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab@kernel.org> | 2023-01-22 11:42:43 +0300 |
| commit | 69c0fe7ae78b9ed696b5a5d8eaae7ca622c6f7ca (patch) | |
| tree | 90ea1a3f0c569bf8b0c6932ce25665bc23551ae2 /include/media/v4l2-subdev.h | |
| parent | 5b0d85b379747b09d8b4630fdb5c8a8d74122f0f (diff) | |
| download | linux-69c0fe7ae78b9ed696b5a5d8eaae7ca622c6f7ca.tar.xz | |
media: subdev: add v4l2_subdev_routing_validate() helper
Add a v4l2_subdev_routing_validate() helper for verifying routing for
common cases like only allowing non-overlapping 1-to-1 streams.
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ideasonboard.com>
Reviewed-by: Jacopo Mondi <jacopo@jmondi.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>
Diffstat (limited to 'include/media/v4l2-subdev.h')
| -rw-r--r-- | include/media/v4l2-subdev.h | 39 |
1 files changed, 39 insertions, 0 deletions
diff --git a/include/media/v4l2-subdev.h b/include/media/v4l2-subdev.h index 0055211a579a..06c254f16b61 100644 --- a/include/media/v4l2-subdev.h +++ b/include/media/v4l2-subdev.h @@ -1584,6 +1584,45 @@ struct v4l2_mbus_framefmt * v4l2_subdev_state_get_opposite_stream_format(struct v4l2_subdev_state *state, u32 pad, u32 stream); +/** + * enum v4l2_subdev_routing_restriction - Subdevice internal routing restrictions + * + * @V4L2_SUBDEV_ROUTING_NO_1_TO_N: + * an input stream may not be routed to multiple output streams (stream + * duplication) + * @V4L2_SUBDEV_ROUTING_NO_N_TO_1: + * multiple input streams may not be routed to the same output stream + * (stream merging) + * @V4L2_SUBDEV_ROUTING_NO_STREAM_MIX: + * streams on the same pad may not be routed to streams on different pads + * @V4L2_SUBDEV_ROUTING_ONLY_1_TO_1: + * only non-overlapping 1-to-1 stream routing is allowed (a combination of + * @V4L2_SUBDEV_ROUTING_NO_1_TO_N and @V4L2_SUBDEV_ROUTING_NO_N_TO_1) + */ +enum v4l2_subdev_routing_restriction { + V4L2_SUBDEV_ROUTING_NO_1_TO_N = BIT(0), + V4L2_SUBDEV_ROUTING_NO_N_TO_1 = BIT(1), + V4L2_SUBDEV_ROUTING_NO_STREAM_MIX = BIT(2), + V4L2_SUBDEV_ROUTING_ONLY_1_TO_1 = + V4L2_SUBDEV_ROUTING_NO_1_TO_N | + V4L2_SUBDEV_ROUTING_NO_N_TO_1, +}; + +/** + * v4l2_subdev_routing_validate() - Verify that routes comply with driver + * constraints + * @sd: The subdevice + * @routing: Routing to verify + * @disallow: Restrictions on routes + * + * This verifies that the given routing complies with the @disallow constraints. + * + * Returns 0 on success, error value otherwise. + */ +int v4l2_subdev_routing_validate(struct v4l2_subdev *sd, + const struct v4l2_subdev_krouting *routing, + enum v4l2_subdev_routing_restriction disallow); + #endif /* CONFIG_VIDEO_V4L2_SUBDEV_API */ #endif /* CONFIG_MEDIA_CONTROLLER */ |