Linus Torvalds began honoring pull requests on Christmas for the in-development Linux 4.21
kernel. Among the initial pull requests were the Direct Rendering Manager (DRM) driver updates that for this cycle most notably has the long-awaited FreeSync/Adaptive-Sync support.
This was a hearty DRM update for Linux 4.21 with a lot of great material included. As a reminder, new on the DRM table for Linux 4.21 are:
- The AMDGPU FreeSync/Adaptive-Sync bits
now that the developers worked out the core DRM properties around variable rate refresh. The Mesa/user-space side FreeSync support should be merged shortly.
- Also on the AMDGPU side is Adaptive Backlight Management (ABM) for Display Core, GPU reset support for Sea Islands / Volcanic Islands / SOC15 hardware, AMDKFD compute support for Vega 12 and Polaris 12, DCC scanout for Vega/GFX9, more xGMI work for Vega 20, GPU reset improvements, DC trace support, PowerPlay updates, and DMA-BUF support for AMDKFD.