AMDGPU's DC Gets More Cleanups Ahead Of Linux 4.15

Written by Michael Larabel in Radeon on 6 October 2017 at 02:04 PM EDT. 30 Comments
It's indeed looking like the AMDGPU DC display code stack will finally be pulled for the Linux 4.15 merge window, assuming Linus Torvalds has no issues with it in a few weeks.

Alex Deucher of AMD today sent in a secondary AMDGPU DC update for staging alongside DRM-Next of this new display code.

This new pull has more than five dozen changes, mostly clean-ups made by DRM subsystem maintainer David Airlie. These 66 patches add in 1,800 lines of new code but trim away 6,644 lines.

Though even with this latest clean-up, it puts the DC display code size still above 120k lines of new kernel code.

AMDGPU DC for Linux 4.15 will be disabled by default for pre-Vega GPUs unless booting with amdgpu.dc=1. AMDGPU DC allows driving monitors attached to Vega/Raven GPUs, HDMI/DP audio on newer GPUs, atomic mode-setting, and other newer display features.
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Michael Larabel is the principal author of and founded the site in 2004 with a focus on enriching the Linux hardware experience. Michael has written more than 20,000 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 automated benchmarking software. He can be followed via Twitter, LinkedIn, or contacted via

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