AMD Posts Navi Display Stream Compression Support For Linux
Written by Michael Larabel in Radeon on 19 August 2019 at 12:39 PM EDT. 22 Comments
RADEON --
One of the kernel-side features not yet in place for AMD's newest Navi graphics processors on Linux has been Display Stream Compression support but that is being squared away with a new patch series.

Fourteen patches posted today adding more than six hundred lines of code to the AMDGPU Linux kernel driver enable Display Stream Compression support for DisplayPort connectors on Navi GPUs. VESA's Display Stream Compression is for low-latency lossless compression performance for power-savings and higher resolution/refresh-rates based on bandwidth and enabling the likes of DisplayPort Multi-Stream Transport (MST) technology.

Though before getting too excited, the patches note that for handling [email protected] and [email protected], "ODM Combine" functionality is needed with Navi and currently that is an AMD-internal feature that may be currently buggy.

The patches for now are on the mailing list but will hopefully be merged for the upcoming Linux 5.4 cycle. Aside from bits like DP DSC, the Linux 5.3 kernel is in good shape for the open-source Navi support with the Radeon RX 5700 series when paired with the forthcoming Mesa 19.2.

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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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