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@xxxxxxxxx>
---
Changes in v5:
- went back to something similar to v2. A call is made to helper
v4l2_create_fwnode_links().
Changes in v4:
- none
Changes in v3:
- this version does the work inline. The previous version called
a media_create_fwnode_links() which is removed in v3.
---
drivers/media/platform/video-mux.c | 22 ++++++++++++++++++++++
1 file changed, 22 insertions(+)
diff --git a/drivers/media/platform/video-mux.c b/drivers/media/platform/video-mux.c
index a21b299ce0e7..4dd6f859450e 100644
--- a/drivers/media/platform/video-mux.c
+++ b/drivers/media/platform/video-mux.c
@@ -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)
--
2.17.1
