Advice on Linux Framebuffer driver implemetation

Hello,

I want advice on how to proceed for the following problem

As per my knowledge the Linux frame buffer requires the
pixel data to
be in a packed pixel contiguous buffer. This means that the
all the
data for one pixel must be packed together, followed by the
data for
the next pixel, etc.(please correct me if I'm wrong)

 On my Set-top-box hardware Vulcan (IBM ppc405),  the best
resolution
supported  in this packed pixel format is 8bpp color table
format.
Vulcan resolutions above the 8bpp color table resolution 
require
separate  luma and chroma buffers,  where the hardware
expects all the
luma values to be in one buffer and all chroma values to be
in another
buffer. Since the data for the resolutions above 8bpp are
required by
the hardware to be in separate luma and chroma buffers it
does not
meet the LInux Frame buffer requirement of packed pixel
data.
Now how can I overcome this limitation where graphics H/W
expects
separate Luma and Chroma buffers whereas linux framebuffer
expect all
things packed. Is there any such driver already present
which I can
study to overcome such limitation.

I'm using Montavista linux kernel 2.4.20 on IBM
stb0x25xxx(ppc405 core).

Regards,
Sudhakar
-- 
SUDHAKAR MOHARANA
#3278,12th main,100ft road,HAL 2nd stage,
indiaranagar,bangalore-8
ph :-(080)5278444,ext-142 (O)

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