Mesa RadeonSI Lands FreeSync / Adaptive-Sync Support That Pair With Linux 4.21
Written by Michael Larabel in Radeon on 28 December 2018 at 01:00 PM EST. 27 Comments
RADEON --
With the FreeSync support for AMD GPUs having been merged this week into Linux 4.21, the associated user-space patches are landing now for rounding out this AMD Radeon FreeSync / Adaptive-Sync / VRR support as we enter 2019.

Hitting Mesa 19.0-devel today was the DRI3 loader support around the new DRM Adaptive-Sync / Variable Refresh property and enabling the option for the RadeonSI OpenGL driver. At the moment there is no FreeSync / Adaptive-Sync support for RADV Vulkan. Also, we haven't seen any FreeSync/Adaptive-Sync work on the Wayland front at this time.

To make it completely clear: the Mesa 19.0 code must be used in conjunction with Linux 4.21+, using just one or the other will not yield working support. There are also patches recently merged for FreeSync support within the xf86-video-amdgpu DDX driver.

I'll be firing up some AMD FreeSync support in the days ahead, hopefully over the weekend if time allows. More details on FreeSync and the open-source AMDGPU driver support via this earlier article.
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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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