Mesa 18.2 Git Lands RadeonSI OpenGL 4.4 Compatibility Profile Support
Written by Michael Larabel in Mesa on 29 June 2018 at 09:10 PM EDT. 13 Comments
MESA --
It was just four days ago that Valve Linux GPU driver developer Timothy Arceri was thinking it could take a while before having OpenGL 4.4 compatibility profile support for RadeonSI, but tonight that milestone is checked off the list.

Yesterday were RadeonSI GL 4.4 compatibility profile patches posted by Arceri after he made a breakthrough in achieving support for this OpenGL revision under the compatibility mode that allows GL's deprecated functionality to be utilized.

In the process he was able to confirm these patches now allow the Windows-only Wolfenstein and Doom games with OpenGL under Wine to behave correctly under RadeonSI. Additionally, the Dyling Light game that makes use of the OpenGL compatibility profile mode is also running without workarounds.

Now as of Friday evening, these GL 4.4 compatibility profile patches have been merged, culminating with enabling it by default. This big step forward for RadeonSI's OpenGL compatibility profile will be found in Mesa 18.2 due out in August, which is a big upgrade from OpenGL 3.1 compatibility as found in Mesa 18.1. Of course, the OpenGL core profile remains at OpenGL 4.5.

The OpenGL compatibility profile support in the closed-source AMD Linux driver "AMDGPU-PRO" was one of the remaining advantages of that driver, but that now is becoming a moot point -- not to mention RadeonSI offering much better performance.
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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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