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media: video-mux: Create media links in bound notifier 

Implement a notifier bound op to register media links from the remote
sub-device's source pad(s) to the video-mux sink pad(s).

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>
This commit is contained in:
Steve Longerbeam 2020-05-01 19:15:46 +02:00 committed by Mauro Carvalho Chehab
parent 400a9034c4
commit 612b385efb
1 changed files with 22 additions and 0 deletions
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22
drivers/media/platform/video-mux.c
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@ -17,6 +17,7 @@
#include <media/v4l2-async.h>
#include <media/v4l2-device.h>
#include <media/v4l2-fwnode.h>
#include <media/v4l2-mc.h>
#include <media/v4l2-subdev.h>
struct video_mux {
@ -36,6 +37,12 @@ static const struct v4l2_mbus_framefmt video_mux_format_mbus_default = {
.field = V4L2_FIELD_NONE,
};
static inline struct video_mux *
notifier_to_video_mux(struct v4l2_async_notifier *n)
{
return container_of(n, struct video_mux, notifier);
}
static inline struct video_mux *v4l2_subdev_to_video_mux(struct v4l2_subdev *sd)
{
return container_of(sd, struct video_mux, subdev);
@ -332,6 +339,19 @@ static const struct v4l2_subdev_ops video_mux_subdev_ops = {
.video = &video_mux_subdev_video_ops,
};
static int video_mux_notify_bound(struct v4l2_async_notifier *notifier,
struct v4l2_subdev *sd,
struct v4l2_async_subdev *asd)
{
struct video_mux *vmux = notifier_to_video_mux(notifier);
return v4l2_create_fwnode_links(sd, &vmux->subdev);
}
static const struct v4l2_async_notifier_operations video_mux_notify_ops = {
.bound = video_mux_notify_bound,
};
static int video_mux_async_register(struct video_mux *vmux,
unsigned int num_input_pads)
{
@ -369,6 +389,8 @@ static int video_mux_async_register(struct video_mux *vmux,
}
}
vmux->notifier.ops = &video_mux_notify_ops;
ret = v4l2_async_subdev_notifier_register(&vmux->subdev,
&vmux->notifier);
if (ret)