[media] uvcvideo: Fix data type for pan/tilt control

The pan/tilt absolute control value is signed value. If minimum value
is minus, It will be changed to plus by clamp_t() as commit 64ae9958a62.
([media] uvcvideo: Fix control value clamping for unsigned integer controls).
It leads to wrong setting of the control values. For example,
when min and max are -36000 and 36000, the setting value between of this range
is always 36000. So, its data type should be changed to signed.

Signed-off-by: Chanho Min <chanho.min@lge.com>
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>

diff --git a/drivers/media/usb/uvc/uvc_ctrl.c b/drivers/media/usb/uvc/uvc_ctrl.c
index a2f4501..0eb8210 100644 (file)
--- a/drivers/media/usb/uvc/uvc_ctrl.c
+++ b/drivers/media/usb/uvc/uvc_ctrl.c
@@ -664,7 +664,7 @@ static struct uvc_control_mapping uvc_ctrl_mappings[] = {
                .size           = 32,
                .offset         = 0,
                .v4l2_type      = V4L2_CTRL_TYPE_INTEGER,
-               .data_type      = UVC_CTRL_DATA_TYPE_UNSIGNED,
+               .data_type      = UVC_CTRL_DATA_TYPE_SIGNED,
        },
        {
                .id             = V4L2_CID_TILT_ABSOLUTE,
@@ -674,7 +674,7 @@ static struct uvc_control_mapping uvc_ctrl_mappings[] = {
                .size           = 32,
                .offset         = 32,
                .v4l2_type      = V4L2_CTRL_TYPE_INTEGER,
-               .data_type      = UVC_CTRL_DATA_TYPE_UNSIGNED,
+               .data_type      = UVC_CTRL_DATA_TYPE_SIGNED,
        },
        {
                .id             = V4L2_CID_PRIVACY,