static int v4l_enumstd(const struct v4l2_ioctl_ops *ops,
				struct file *file, void *fh, void *arg)
{
	struct video_device *vfd = video_devdata(file);
	struct v4l2_standard *p = arg;

	return v4l_video_std_enumstd(p, vfd->tvnorms);
}