YUV support

Hi again,

I'm starting to investigate adding YUV support to the intelfb driver,  
and I was wondering what support is already in the framebuffer  
subsystem for YUV.  Doing a quick grep for YUV only yielded a handful  
of references -- all in drivers.  Nothing seems to be there for  
generic YUV support.

Am I correct in this assumption?  And, if so, what would be the best  
way to expose YUV support?  Driver specific ioctl's?  Separate fb  
device for the YUV overlay?  Give up and use X? (just kidding on that  
last one -- I hope).

dennis


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