Hi Lucas,
As we discussed on ELCE last month in Prague we have Vivante GPU built-in our new ARC HSDK development board.
And even though [thanks to your suggestions] I got Etnaviv driver working perfectly fine on our board I faced one quite a tricky situation [which I dirty worked-around for now].
Etnaviv driver uses some PHYS_OFFSET define which is not very usual across all architectures and platforms supported by Linux kernel.
In fact for ARC we don't have PHYS_OFFSET defined [yet]. And I'm wondering how to get this resolved.
Essentially we have 2 options: 1. Define PHYS_OFFSET for ARC (and later for other arches once needed) 2. Replace PHYS_OFFSET with something else in etnaviv sources.
Even though (1) seems to be the simplest solution is doesn't look very nice because it seems to be quite ARM-specific but not something really generic and portable.
As for (2) frankly I din't quite understand why do we really care about DDR start offset in the GPU driver. If some more light could be shed on this topic probably we'll figure out what would be more elegant solution.
Regards, Alexey