VIDIOC_QUERYSTD
v4l2_disable_ioctl(&dev->vid_cap_dev, VIDIOC_QUERYSTD);
v4l2_disable_ioctl(&v4l2->vdev, VIDIOC_QUERYSTD);
v4l2_disable_ioctl(vdev, VIDIOC_QUERYSTD);
SET_VALID_IOCTL(ops, VIDIOC_QUERYSTD, vidioc_querystd);
IOCTL_INFO(VIDIOC_QUERYSTD, v4l_querystd, v4l_print_std, 0),