DP_USB4_DRIVER_ID_BITS
tunnel_group_id(drv_group_id) & ((1 << DP_USB4_DRIVER_ID_BITS) - 1));
tunnel_group_id(drv_group_id) & ((1 << DP_USB4_DRIVER_ID_BITS) - 1),
#define DP_USB4_DRIVER_ID_MASK ((1 << DP_USB4_DRIVER_ID_BITS) - 1)