Laurent, can you review this?
Regards,
Hans
On 08/21/2015 03:19 PM, Ricardo Ribalda Delgado wrote:
> This driver does not use the control infrastructure.
> Add support for the new field which on structure
> v4l2_ext_controls
>
> Signed-off-by: Ricardo Ribalda Delgado <ricardo.ribalda@xxxxxxxxx>
> ---
> drivers/media/usb/uvc/uvc_v4l2.c | 14 +++++++++++++-
> 1 file changed, 13 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/media/usb/uvc/uvc_v4l2.c b/drivers/media/usb/uvc/uvc_v4l2.c
> index 2764f43607c1..e6d3a1bcfa2f 100644
> --- a/drivers/media/usb/uvc/uvc_v4l2.c
> +++ b/drivers/media/usb/uvc/uvc_v4l2.c
> @@ -980,6 +980,7 @@ static int uvc_ioctl_g_ext_ctrls(struct file *file, void *fh,
> struct uvc_fh *handle = fh;
> struct uvc_video_chain *chain = handle->chain;
> struct v4l2_ext_control *ctrl = ctrls->controls;
> + struct v4l2_queryctrl qc;
> unsigned int i;
> int ret;
>
> @@ -988,7 +989,14 @@ static int uvc_ioctl_g_ext_ctrls(struct file *file, void *fh,
> return ret;
>
> for (i = 0; i < ctrls->count; ++ctrl, ++i) {
> - ret = uvc_ctrl_get(chain, ctrl);
> + if (ctrls->which == V4L2_CTRL_WHICH_DEF_VAL) {
> + qc.id = ctrl->id;
> + ret = uvc_query_v4l2_ctrl(chain, &qc);
> + if (!ret)
> + ctrl->value = qc.default_value;
> + } else
> + ret = uvc_ctrl_get(chain, ctrl);
> +
> if (ret < 0) {
> uvc_ctrl_rollback(handle);
> ctrls->error_idx = i;
> @@ -1010,6 +1018,10 @@ static int uvc_ioctl_s_try_ext_ctrls(struct uvc_fh *handle,
> unsigned int i;
> int ret;
>
> + /* Default value cannot be changed */
> + if (ctrls->which == V4L2_CTRL_WHICH_DEF_VAL)
> + return -EINVAL;
> +
> ret = uvc_ctrl_begin(chain);
> if (ret < 0)
> return ret;
>
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