The driver exposes v4l devices as Xv ports. It is not a conventional ddx and doesn't allow you to run X on your v4l device. It's basically a helper module so that the v4l devices can stream data directly to an Xv buffer in GPU accessible memory, saving some memcpys when displaying video from the v4l device.
No announcement yet.
xf86-video-v4l Driver Ported To V4L2