[Mesa-dev] A question about r600/evergreen documentation

Marek Olšák maraeo at gmail.com
Tue May 31 04:41:01 PDT 2011

I think there are some IP conflicts among gpu vendors regarding
anisotropic filtering. That's why there is no core support for it in
OpenGL and that's why anisotropic filtering is undocumented in all the
AMD docs. Try to search the code, some ANISO registers have been
figured out, like S_03C000_ANISO you mentioned.


On Tue, May 31, 2011 at 1:34 PM, Marcello Maggioni <hayarms at gmail.com> wrote:
> Hello, I was studying the anisotropic filtering patch that was posted
> on this list the 6th of May in order to understand better how the
> r600g drivers work, but while reading the patch I noticed that the
> documentation about r600 I have seems to miss some key information.
> First of all the documentation I have is the one found on
> http://www.x.org/docs/AMD/ .
> In the patch bits [21:19] of the SQ_TEX_SAMPLER_WORD0_0 register are
> set and in the code these are specified as S_03C000_ANISO, but in the
> documentation I have (R6xx_3D_Registers.pdf) those bits are specified
> as "Reserved".
> I'm wondering if there are better docs around and the ones on that
> website are outdated. If so where is it possible to find the new docs?
> Thanks
> Marcello
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