On 12/3/19 10:48 PM, Marek Olšák wrote: > On Wed., Dec. 4, 2019, 01:20 Tapani Pälli, <tapani.pa...@intel.com > <mailto:tapani.pa...@intel.com>> wrote: > > Hi; > > On 12/4/19 2:39 AM, Marek Olšák wrote: > > Hi, > > > > Here are 2 proposals to simplify and better optimize the GL->Gallium > > translation. > > > > 1) Move classic drivers to a fork of Mesa, and remove them from > master. > > Classic drivers won't share any code with master. glvnd will load > them, > > but glvnd is not ready for this yet. > > > > 2) Keep classic drivers. Fork src/mesa for Gallium. I think only > > mesa/main, mesa/vbo, mesa/program, and drivers/dri/common need to be > > forked and mesa/state_tracker moved. > src/gallium/state-trackers/gl/ can > > be the target location. > > > > Option 2 is more acceptable to people who want to keep classic > drivers > > in the tree and it can be done right now. > > > > Opinions? > > > > I'm still quite newbie with gallium side of things and I'd like to know > more about the possible simplifications and optimizations that could be > done if this happened. Is this more about 'cleaning up the tree' or are > there also some performance opportunities we are missing right now with > current state? > > > It's possible to reduce CPU overhead even more by moving state > translation from st_validate_state to GL functions. This is possible > already, but at the cost of effectively adding dead code to classic > drivers. In theory we could do slightly better without classic drivers, > but we don't know for sure.
If someone wants to start on this, I would be more than happy to help with the work on the old, poorly maintained drivers. I have almost all of the necessary hardware installed in (mostly) functioning systems. The "big CPU system" I have in my house has a PCI Radeon 9000 installed, and I use it fairly regularly. > If we had nir_to_tgsi, we could remove TGSI support from st/mesa. Option > 1 would leave st/mesa as the only consumer of Mesa IR and GLSL IR, so > both IRs could be eliminated in favor of NIR more easily. Although I > guess a simpler option is not to touch anything. > > Marek _______________________________________________ mesa-dev mailing list mesa-dev@lists.freedesktop.org https://lists.freedesktop.org/mailman/listinfo/mesa-dev