diff mbox series

[v6,12/22] media: video-mux: Create media links in bound notifier

Message ID 20200501171556.14731-13-slongerbeam@gmail.com
State Superseded
Headers show
Series media: imx: Create media links in bound notifiers | expand

Commit Message

Steve Longerbeam May 1, 2020, 5:15 p.m. UTC
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>
---
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 mbox series

Patch

diff --git a/drivers/media/platform/video-mux.c b/drivers/media/platform/video-mux.c
index 9f148f403603..53570250a25d 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)