Add a subdev capability flag to expose to userspace if a subdev supports
multiplexed streams.
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@xxxxxxxxxxxxxxxx>
---
drivers/media/v4l2-core/v4l2-subdev.c | 5 ++++-
include/uapi/linux/v4l2-subdev.h | 3 +++
2 files changed, 7 insertions(+), 1 deletion(-)
diff --git a/drivers/media/v4l2-core/v4l2-subdev.c b/drivers/media/v4l2-core/v4l2-subdev.c
index ca5b764d796d..8983d33fdb4b 100644
--- a/drivers/media/v4l2-core/v4l2-subdev.c
+++ b/drivers/media/v4l2-core/v4l2-subdev.c
@@ -431,6 +431,7 @@ static long subdev_do_ioctl(struct file *file, unsigned int cmd, void *arg,
struct v4l2_subdev *sd = vdev_to_v4l2_subdev(vdev);
struct v4l2_fh *vfh = file->private_data;
bool ro_subdev = test_bit(V4L2_FL_SUBDEV_RO_DEVNODE, &vdev->flags);
+ bool streams_subdev = sd->flags & V4L2_SUBDEV_FL_STREAMS;
int rval;
switch (cmd) {
@@ -439,7 +440,9 @@ static long subdev_do_ioctl(struct file *file, unsigned int cmd, void *arg,
memset(cap->reserved, 0, sizeof(cap->reserved));
cap->version = LINUX_VERSION_CODE;
- cap->capabilities = ro_subdev ? V4L2_SUBDEV_CAP_RO_SUBDEV : 0;
+ cap->capabilities =
+ (ro_subdev ? V4L2_SUBDEV_CAP_RO_SUBDEV : 0) |
+ (streams_subdev ? V4L2_SUBDEV_CAP_STREAMS : 0);
return 0;
}
diff --git a/include/uapi/linux/v4l2-subdev.h b/include/uapi/linux/v4l2-subdev.h
index 658106f5b5dc..89af27f50a41 100644
--- a/include/uapi/linux/v4l2-subdev.h
+++ b/include/uapi/linux/v4l2-subdev.h
@@ -188,6 +188,9 @@ struct v4l2_subdev_capability {
/* The v4l2 sub-device video device node is registered in read-only mode. */
#define V4L2_SUBDEV_CAP_RO_SUBDEV 0x00000001
+/* The v4l2 sub-device supports routing and multiplexed streams. */
+#define V4L2_SUBDEV_CAP_STREAMS 0x00000002
+
/* Backwards compatibility define --- to be removed */
#define v4l2_subdev_edid v4l2_edid
--
2.34.1
