Hi Sylwester,
On Mon, Sep 24, 2012 at 03:26:53PM +0200, Sylwester Nawrocki wrote:
> The s_rx_buffer callback allows the host to set buffer for non-image
> (meta) data at a subdev. This callback can be implemented by an image
> sensor or a MIPI-CSI receiver, allowing the host to retrieve the frame
> embedded data from a subdev.
>
> Signed-off-by: Sylwester Nawrocki <s.nawrocki@xxxxxxxxxxx>
> Signed-off-by: Kyungmin Park <kyungmin.park@xxxxxxxxxxx>
> ---
> include/media/v4l2-subdev.h | 6 ++++++
> 1 file changed, 6 insertions(+)
>
> diff --git a/include/media/v4l2-subdev.h b/include/media/v4l2-subdev.h
> index 22ab09e..28067ed 100644
> --- a/include/media/v4l2-subdev.h
> +++ b/include/media/v4l2-subdev.h
> @@ -274,6 +274,10 @@ struct v4l2_subdev_audio_ops {
> s_mbus_config: set a certain mediabus configuration. This operation is added
> for compatibility with soc-camera drivers and should not be used by new
> software.
> +
> + s_rx_buffer: set a host allocated memory buffer for the subdev. The subdev
> + can adjust @size to a lower value and must not write more data to the
> + buffer starting at @data than the original value of @size.
> */
> struct v4l2_subdev_video_ops {
> int (*s_routing)(struct v4l2_subdev *sd, u32 input, u32 output, u32 config);
> @@ -327,6 +331,8 @@ struct v4l2_subdev_video_ops {
> struct v4l2_mbus_config *cfg);
> int (*s_mbus_config)(struct v4l2_subdev *sd,
> const struct v4l2_mbus_config *cfg);
> + int (*s_rx_buffer)(struct v4l2_subdev *sd, void *buf,
> + unsigned int *size);
> };
>
> /*
How about useing a separate video buffer queue for the purpose? That would
provide a nice way to pass it to the user space where it's needed. It'd also
play nicely together with the frame layout descriptors.
Kind regards,
--
Sakari Ailus
e-mail: sakari.ailus@xxxxxx XMPP: sailus@xxxxxxxxxxxxxx
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