V4L2_IN_ST_NO_SYNC
V4L2_IN_ST_NO_SYNC : V4L2_IN_ST_NO_H_LOCK;
*status |= no_sync(sd) ? V4L2_IN_ST_NO_SYNC : 0;
*status = V4L2_IN_ST_NO_SYNC;
i->status |= V4L2_IN_ST_NO_SYNC;
i->status |= V4L2_IN_ST_NO_SYNC;
i->status |= V4L2_IN_ST_NO_SYNC;