smi7xx.so - ZV port activation

I would like to activate the ZV port of the SM722 vga chip to display
a video stream from a external Y/UV video decoder.

The standard devg-smi7xx.so does not support any actiation of the
video ZV port. I use QNX 6.3 SP1.

Does anybody knows how to activate the ZV port / video capture
interface ?

:unamused: