Symbol: V4L2_CTRL_CLASS_FM_RX
drivers/media/v4l2-core/v4l2-ctrls-core.c
2456
if (V4L2_CTRL_ID2WHICH(ctrl->id) == V4L2_CTRL_CLASS_FM_RX)
include/uapi/linux/v4l2-controls.h
1282
#define V4L2_CID_FM_RX_CLASS_BASE (V4L2_CTRL_CLASS_FM_RX | 0x900)
include/uapi/linux/v4l2-controls.h
1283
#define V4L2_CID_FM_RX_CLASS (V4L2_CTRL_CLASS_FM_RX | 1)