On 03/09/2018 09:49 AM, Gustavo Padovan wrote:
> From: Gustavo Padovan <gustavo.padovan@xxxxxxxxxxxxx>
>
> Drivers capable of using fences (vb2 drivers) should report the
> V4L2_CAP_FENCES to userspace, so add this flag to the uapi.
>
> Signed-off-by: Gustavo Padovan <gustavo.padovan@xxxxxxxxxxxxx>
> ---
> Documentation/media/uapi/v4l/vidioc-querycap.rst | 3 +++
> include/uapi/linux/videodev2.h | 1 +
> 2 files changed, 4 insertions(+)
>
> diff --git a/Documentation/media/uapi/v4l/vidioc-querycap.rst b/Documentation/media/uapi/v4l/vidioc-querycap.rst
> index 66fb1b3d6e6e..414016065309 100644
> --- a/Documentation/media/uapi/v4l/vidioc-querycap.rst
> +++ b/Documentation/media/uapi/v4l/vidioc-querycap.rst
> @@ -254,6 +254,9 @@ specification the ioctl returns an ``EINVAL`` error code.
> * - ``V4L2_CAP_TOUCH``
> - 0x10000000
> - This is a touch device.
> + * - ``V4L2_CAP_FENCES``
> + - 0x20000000
> + - The device support explicit synchronization.
support -> supports
> * - ``V4L2_CAP_DEVICE_CAPS``
> - 0x80000000
> - The driver fills the ``device_caps`` field. This capability can
> diff --git a/include/uapi/linux/videodev2.h b/include/uapi/linux/videodev2.h
> index 2d424aebdd1e..db58204e346e 100644
> --- a/include/uapi/linux/videodev2.h
> +++ b/include/uapi/linux/videodev2.h
> @@ -460,6 +460,7 @@ struct v4l2_capability {
> #define V4L2_CAP_STREAMING 0x04000000 /* streaming I/O ioctls */
>
> #define V4L2_CAP_TOUCH 0x10000000 /* Is a touch device */
> +#define V4L2_CAP_FENCES 0x20000000 /* Supports explicit synchronization */
>
> #define V4L2_CAP_DEVICE_CAPS 0x80000000 /* sets device capabilities field */
>
>
Regards,
Hans
