Frame Buffer and Y Cb Cr

Frame Buffer and Y Cb Cr

[Federico Lucifredi]

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

Re: Frame Buffer and Y Cb Cr

[Wolfgang Denk]

In message <41DEFB89.5060404@acm.org> you wrote:
> 
>     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.

Have a look at the arch/ppc/8xx_io/viedo* files in our old  linux-2.4
tree  on the CVS server - this driver is for the video contoller on a
MPC823 wich needs YCbCr.

Best regards,

Wolfgang Denk

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Software Engineering:  Embedded and Realtime Systems,  Embedded Linux
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