On 2/4/20 3:56 AM, Sergey Senozhatsky wrote:
> Add V4L2_BUF_CAP_SUPPORTS_CACHE_HINTS to fill_buf_caps(), which
> is set when queue supports user-space cache management hints.
Ah, you add the capability here :-)
This should be moved forward in the series. Actually, I think this should
be merged with the first patch of the series.
Regards,
Hans
>
> Change-Id: Ieac93f3726c61fd3b88e02c36980c1f3c7a82ecc
> Signed-off-by: Sergey Senozhatsky <senozhatsky@xxxxxxxxxxxx>
> ---
> Documentation/media/uapi/v4l/vidioc-reqbufs.rst | 7 +++++++
> drivers/media/common/videobuf2/videobuf2-v4l2.c | 2 ++
> include/uapi/linux/videodev2.h | 1 +
> 3 files changed, 10 insertions(+)
>
> diff --git a/Documentation/media/uapi/v4l/vidioc-reqbufs.rst b/Documentation/media/uapi/v4l/vidioc-reqbufs.rst
> index 9741dac0d5b3..80603f57eb8a 100644
> --- a/Documentation/media/uapi/v4l/vidioc-reqbufs.rst
> +++ b/Documentation/media/uapi/v4l/vidioc-reqbufs.rst
> @@ -165,6 +165,13 @@ aborting or finishing any DMA in progress, an implicit
> - Only valid for stateless decoders. If set, then userspace can set the
> ``V4L2_BUF_FLAG_M2M_HOLD_CAPTURE_BUF`` flag to hold off on returning the
> capture buffer until the OUTPUT timestamp changes.
> + * - ``V4L2_BUF_CAP_SUPPORTS_CACHE_HINTS``
> + - 0x00000040
> + - Set when the queue/buffer support memory consistency and cache
> + management hints. See :ref:`V4L2_FLAG_MEMORY_NON_CONSISTENT`,
> + :ref:`V4L2_BUF_FLAG_NO_CACHE_INVALIDATE` and
> + :ref:`V4L2_BUF_FLAG_NO_CACHE_CLEAN`.
> +
>
> Return Value
> ============
> diff --git a/drivers/media/common/videobuf2/videobuf2-v4l2.c b/drivers/media/common/videobuf2/videobuf2-v4l2.c
> index eb5d1306cb03..22ae0ff64684 100644
> --- a/drivers/media/common/videobuf2/videobuf2-v4l2.c
> +++ b/drivers/media/common/videobuf2/videobuf2-v4l2.c
> @@ -698,6 +698,8 @@ static void fill_buf_caps(struct vb2_queue *q, u32 *caps)
> *caps |= V4L2_BUF_CAP_SUPPORTS_DMABUF;
> if (q->subsystem_flags & VB2_V4L2_FL_SUPPORTS_M2M_HOLD_CAPTURE_BUF)
> *caps |= V4L2_BUF_CAP_SUPPORTS_M2M_HOLD_CAPTURE_BUF;
> + if (q->allow_cache_hints)
> + *caps |= V4L2_BUF_CAP_SUPPORTS_CACHE_HINTS;
> #ifdef CONFIG_MEDIA_CONTROLLER_REQUEST_API
> if (q->supports_requests)
> *caps |= V4L2_BUF_CAP_SUPPORTS_REQUESTS;
> diff --git a/include/uapi/linux/videodev2.h b/include/uapi/linux/videodev2.h
> index 169a8cf345ed..12b1bd220347 100644
> --- a/include/uapi/linux/videodev2.h
> +++ b/include/uapi/linux/videodev2.h
> @@ -951,6 +951,7 @@ struct v4l2_requestbuffers {
> #define V4L2_BUF_CAP_SUPPORTS_REQUESTS (1 << 3)
> #define V4L2_BUF_CAP_SUPPORTS_ORPHANED_BUFS (1 << 4)
> #define V4L2_BUF_CAP_SUPPORTS_M2M_HOLD_CAPTURE_BUF (1 << 5)
> +#define V4L2_BUF_CAP_SUPPORTS_CACHE_HINTS (1 << 6)
>
> /**
> * struct v4l2_plane - plane info for multi-planar buffers
>
