VIDIOC_ENUMSTD
v4l2_disable_ioctl(&dev->vid_cap_dev, VIDIOC_ENUMSTD);
v4l2_disable_ioctl(&dev->vid_out_dev, VIDIOC_ENUMSTD);
return VIDIOC_ENUMSTD;
__set_bit(_IOC_NR(VIDIOC_ENUMSTD), valid_ioctls);
IOCTL_INFO(VIDIOC_ENUMSTD, v4l_enumstd, v4l_print_standard, INFO_FL_CLEAR(v4l2_standard, index)),