Commit 9a6b5bf4 authored by Tomi Valkeinen's avatar Tomi Valkeinen Committed by Mauro Carvalho Chehab
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media: add V4L2_SUBDEV_CAP_STREAMS 



Add a subdev capability flag to expose to userspace if a subdev supports
multiplexed streams.

Signed-off-by: default avatarTomi Valkeinen <tomi.valkeinen@ideasonboard.com>
Signed-off-by: default avatarMauro Carvalho Chehab <mchehab@kernel.org>
parent d6cc9c7c

drivers/media/v4l2-core/v4l2-subdev.c

+4 −1
Original line number Diff line number Diff line
@@ -446,6 +446,7 @@ 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) {
@@ -454,7 +455,9 @@ 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;

	}

include/uapi/linux/v4l2-subdev.h

+3 −0
Original line number Diff line number Diff line
@@ -175,6 +175,9 @@ 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