pwc_wb_speed 257 include/media/pwc-ioctl.h #define VIDIOCPWCSAWBSPEED _IOW('v', 203, struct pwc_wb_speed) pwc_wb_speed 258 include/media/pwc-ioctl.h #define VIDIOCPWCGAWBSPEED _IOR('v', 203, struct pwc_wb_speed)