Recently I started working on OMAP-L138 based board, it has many interface. But I interested on Video Port InterFace (VPIF) S-Video out. My task is to bring up X11 thru that interface. After loading kernel successfully, booted the board thru NFS. Just to check the VPIF interface working state, I ran the VPIF Test code and successfully got the std TV pattern on TV Screen. So I thought, next task of bring up X11 will be a child play. After spending few days, I understood that is impossible or time consuming task.
- X11 will not run on VPIF interface.
- Test programs are V4L2 program.
- No Frame Buffer interface to VPIF. Because, FBDev supports RGB and VPIF supports stream (NTSC, PAL).
- OMAP-L138 display interface won’t support display overlays.
Due to this limitation, I am thinking of using Graphics LCD driver and connect an external RGB to S-Video chip to get the output on TV Screen.