V4L2_CTRL_CLASS_DETECT  941 include/uapi/linux/v4l2-controls.h #define V4L2_CID_DETECT_CLASS_BASE		(V4L2_CTRL_CLASS_DETECT | 0x900)
V4L2_CTRL_CLASS_DETECT  942 include/uapi/linux/v4l2-controls.h #define V4L2_CID_DETECT_CLASS			(V4L2_CTRL_CLASS_DETECT | 1)