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media: subdev: Split V4L2_SUBDEV_ROUTING_NO_STREAM_MIX 

V4L2_SUBDEV_ROUTING_NO_STREAM_MIX routing validation flag means that all
routes from a sink pad must go to the same source pad and all routes
going to the same source pad must originate from the same sink pad.

This does not cover all use cases. For example, if a device routes
all streams from a single sink pad to any of the source pads, but
streams from multiple sink pads can go to the same source pad, the
current flag is too restrictive.

Split the flag into two parts, V4L2_SUBDEV_ROUTING_NO_SINK_STREAM_MIX
and V4L2_SUBDEV_ROUTING_NO_SOURCE_STREAM_MIX, which add the restriction
only on one side of the device. Together they mean the same as
V4L2_SUBDEV_ROUTING_NO_STREAM_MIX.

Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ideasonboard.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: Jacopo Mondi <jacopo.mondi@ideasonboard.com>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>
This commit is contained in:
Tomi Valkeinen 2023-03-02 10:57:47 +01:00 committed by Mauro Carvalho Chehab
parent a50ee4afc7
commit 698a619a04
2 changed files with 25 additions and 7 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

15
drivers/media/v4l2-core/v4l2-subdev.c
View File

@ -1737,10 +1737,10 @@ int v4l2_subdev_routing_validate(struct v4l2_subdev *sd,
}
/*
* V4L2_SUBDEV_ROUTING_NO_STREAM_MIX: Streams on the same pad
* shall not be routed to streams on different pads.
* V4L2_SUBDEV_ROUTING_NO_SINK_STREAM_MIX: all streams from a
* sink pad must be routed to a single source pad.
*/
if (disallow & V4L2_SUBDEV_ROUTING_NO_STREAM_MIX) {
if (disallow & V4L2_SUBDEV_ROUTING_NO_SINK_STREAM_MIX) {
if (remote_pads[route->sink_pad] != U32_MAX &&
remote_pads[route->sink_pad] != route->source_pad) {
dev_dbg(sd->dev,
@ -1749,6 +1749,14 @@ int v4l2_subdev_routing_validate(struct v4l2_subdev *sd,
goto out;
}
remote_pads[route->sink_pad] = route->source_pad;
}
/*
* V4L2_SUBDEV_ROUTING_NO_SOURCE_STREAM_MIX: all streams on a
* source pad must originate from a single sink pad.
*/
if (disallow & V4L2_SUBDEV_ROUTING_NO_SOURCE_STREAM_MIX) {
if (remote_pads[route->source_pad] != U32_MAX &&
remote_pads[route->source_pad] != route->sink_pad) {
dev_dbg(sd->dev,
@ -1757,7 +1765,6 @@ int v4l2_subdev_routing_validate(struct v4l2_subdev *sd,
goto out;
}
remote_pads[route->sink_pad] = route->source_pad;
remote_pads[route->source_pad] = route->sink_pad;
}

17
include/media/v4l2-subdev.h
View File

@ -1647,19 +1647,30 @@ u64 v4l2_subdev_state_xlate_streams(const struct v4l2_subdev_state *state,
* @V4L2_SUBDEV_ROUTING_NO_N_TO_1:
* multiple input streams shall not be routed to the same output stream
* (stream merging)
* @V4L2_SUBDEV_ROUTING_NO_STREAM_MIX:
* streams on the same pad shall not be routed to streams on different pads
* @V4L2_SUBDEV_ROUTING_NO_SINK_STREAM_MIX:
* all streams from a sink pad must be routed to a single source pad
* @V4L2_SUBDEV_ROUTING_NO_SOURCE_STREAM_MIX:
* all streams on a source pad must originate from a single sink pad
* @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)
* @V4L2_SUBDEV_ROUTING_NO_STREAM_MIX:
* all streams from a sink pad must be routed to a single source pad, and
* that source pad shall not get routes from any other sink pad
* (a combination of @V4L2_SUBDEV_ROUTING_NO_SINK_STREAM_MIX and
* @V4L2_SUBDEV_ROUTING_NO_SOURCE_STREAM_MIX)
*/
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_NO_SINK_STREAM_MIX = BIT(2),
V4L2_SUBDEV_ROUTING_NO_SOURCE_STREAM_MIX = BIT(3),
V4L2_SUBDEV_ROUTING_ONLY_1_TO_1 =
V4L2_SUBDEV_ROUTING_NO_1_TO_N |
V4L2_SUBDEV_ROUTING_NO_N_TO_1,
V4L2_SUBDEV_ROUTING_NO_STREAM_MIX =
V4L2_SUBDEV_ROUTING_NO_SINK_STREAM_MIX |
V4L2_SUBDEV_ROUTING_NO_SOURCE_STREAM_MIX,
};
/**