R600 Gallium3D Gets More Fixes, Experimental SB Tessellation Support
Written by Michael Larabel in Mesa on 10 January 2018 at 05:29 AM EST. 23 Comments
MESA --
If you are still running with a pre-GCN AMD graphics card, a number of R600 Gallium3D commits landed in Mesa Git over night as well as an interesting patch series on the Mesa mailing list.

Hitting Mesa 17.4-dev Git a few hours ago were a number of R600 Gallium3D fixes. This time around the various fixes come courtesy of VMware's Roland Scheidegger, a long time Mesa developer. They are a variety of minor fixes. It's nice to see nevertheless as R600g doesn't get too much action these days.

Meanwhile, Red Hat's David Airlie posted a set of 21 patches that is baking R600 SB tessellation support. R600g already supports tessellation shaders but this is about supporting them with the SB shader back-end for optimizations. Airlie is still testing this code but so far is at least panning out for Unigine Heaven.

Unfortunately, nothing to report on any progress of the "soft" FP64 support for R600g for allowing non-HD5800/HD6900 GPUs for having OpenGL 4.0+ support. That is the elephant in the room for most while the HD 5800 / HD 6900 series offers OpenGL 4.3 support recently rather than OpenGL 3.3 with the other pre-GCN GPUs.

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Michael Larabel is the principal author of Phoronix.com and founded the site in 2004 with a focus on enriching the Linux hardware experience. Michael has written more than 10,000 articles covering the state of Linux hardware support, Linux performance, graphics drivers, and other topics. Michael is also the lead developer of the Phoronix Test Suite, Phoromatic, and OpenBenchmarking.org automated benchmarking software. He can be followed via Twitter or contacted via MichaelLarabel.com.

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