[Letux-kernel] Lay common foundation to make PVR/SGX work without hacks on OMAP34xx, OMAP36xx, AM335x and potentially OMAP4, OMAP5

[Philipp Rossak]

>> 3. Your reverse engineering project that might help
>>    with figuring out how things are supposed to work
> 
> IMHO a completely separate project.
> 
> Basically there is a strict layering:
> 
> L4	user-space libraries
> L3	SGX firmware
> L2	SGX firmware loader
> L1	SoC glue (clock, reset, dma, virtual memory, ...)
> 
> I am mainly considering L1 here and fixing L2. L1 is SoC
> specific of course and L2 needs Linux-release specific patches.
> 
> L2-L4 depend on SGX version.
> 
> L2 contains a lot of #ifdef that depend on SGX530/540/544 and even
> more.
> 
> Reverse engineering addresses L3 and L4.
> 
> Of course if will be is successful it might become possible to improve
> the whole L1-L4 stack, but that is another 10 years in the future :)
> 
> Since it is such a big task, I would propose to start with something
> close to working (some TI/IMG DDK) and improve on that instead of
> starting with parts from scratch.
> 
I just can agree on that . For good reverse engineering we need also a 
working reference system where we also can dump misc stuff, like it is 
done with lima.

> BR,
> Nikolaus
> 
>