Hi Kondo,
Are you still woking on Interfacing THS8200 with OMAP-L138 ?
Before that i suggest you to go throgh the C6748 LCDK board schematics there we have interfaced TVP5147 sinlge chip digital video decoder to have a VGA output.
http://processors.wiki.ti.com/index.php/L138/C6748_Development_Kit_(LCDK)
Regards
Antony