Frame Buffer and Y Cb Cr

Hello All,
    I am working on a fb driver for linux in an embedded PPC setup. I 
have it working as far as linux is concerned, and I also understand the 
video card side of the problem.

    My trouble is: Linux sends me R G B and the hardware expects Y Cb 
Cr. As things work through a memory-mapped file, I am at a loss for an 
"intelligent" way to intercept and convert these values.

    Any suggestions ?

    Best - Federico

-- 
_________________________________________
-- "'Problem' is a bleak word for challenge" - Richard Fish

Muad'Dib of Caladan (Federico L. Lucifredi)- Harvard University & BU
http://metcs.bu.edu/~lucifred