Hi,
What I found out is that C6748 PSP VPIF driver is unable to receive just single frame. It blocks on FVID_dequeue(..), however from logicanalyzer trace can be seen that single frame is actually sent by camera sensor. I am using MT9M034 sensor and VPIF is confgured to use 12 bit RAW mode.
If 2 frames are streamed in the row then in the beginning of the second frame FVID_dequeue(..) receives first frame. Therefore in order to get just one frame at least 2 frames are needed.
I think it is more like bug report so I just let you know.
Andres Vahter