Ups, please ignore this, I changed the commit message and forgot to
wipe the directory where I have formatted out the patches..

On Tue, Aug 27, 2019 at 11:23:31AM +0200, Jacopo Mondi wrote:
> Add support for the newly defined V4L2_CID_CAMERA_SENSOR_LOCATION
> read-only control used to report the camera device mounting position.
>
> Signed-off-by: Jacopo Mondi <jacopo@jmondi.org>
> ---
>  drivers/media/v4l2-core/v4l2-ctrls.c | 2 ++
>  include/uapi/linux/v4l2-controls.h   | 5 +++++
>  2 files changed, 7 insertions(+)
>
> diff --git a/drivers/media/v4l2-core/v4l2-ctrls.c b/drivers/media/v4l2-core/v4l2-ctrls.c
> index 1d8f38824631..db7124494530 100644
> --- a/drivers/media/v4l2-core/v4l2-ctrls.c
> +++ b/drivers/media/v4l2-core/v4l2-ctrls.c
> @@ -994,6 +994,7 @@ const char *v4l2_ctrl_get_name(u32 id)
>  	case V4L2_CID_AUTO_FOCUS_RANGE:		return "Auto Focus, Range";
>  	case V4L2_CID_PAN_SPEED:		return "Pan, Speed";
>  	case V4L2_CID_TILT_SPEED:		return "Tilt, Speed";
> +	case V4L2_CID_CAMERA_SENSOR_LOCATION:	return "Camera Sensor Location";
>
>  	/* FM Radio Modulator controls */
>  	/* Keep the order of the 'case's the same as in v4l2-controls.h! */
> @@ -1318,6 +1319,7 @@ void v4l2_ctrl_fill(u32 id, const char **name, enum v4l2_ctrl_type *type,
>  		break;
>  	case V4L2_CID_MIN_BUFFERS_FOR_CAPTURE:
>  	case V4L2_CID_MIN_BUFFERS_FOR_OUTPUT:
> +	case V4L2_CID_CAMERA_SENSOR_LOCATION:
>  		*type = V4L2_CTRL_TYPE_INTEGER;
>  		*flags |= V4L2_CTRL_FLAG_READ_ONLY;
>  		break;
> diff --git a/include/uapi/linux/v4l2-controls.h b/include/uapi/linux/v4l2-controls.h
> index a2669b79b294..387c2c8553cb 100644
> --- a/include/uapi/linux/v4l2-controls.h
> +++ b/include/uapi/linux/v4l2-controls.h
> @@ -912,6 +912,11 @@ enum v4l2_auto_focus_range {
>  #define V4L2_CID_PAN_SPEED			(V4L2_CID_CAMERA_CLASS_BASE+32)
>  #define V4L2_CID_TILT_SPEED			(V4L2_CID_CAMERA_CLASS_BASE+33)
>
> +#define V4L2_CID_CAMERA_SENSOR_LOCATION		(V4L2_CID_CAMERA_CLASS_BASE+34)
> +#define V4L2_LOCATION_FRONT			0
> +#define V4L2_LOCATION_BACK			1
> +#define V4L2_LOCATION_EXTERNAL			2
> +
>  /* FM Modulator class control IDs */
>
>  #define V4L2_CID_FM_TX_CLASS_BASE		(V4L2_CTRL_CLASS_FM_TX | 0x900)
> --
> 2.23.0
>