In addition to [1]AMD engineers being busy rolling out HDMI 2.1 for their open-source Linux driver at long last, another notable display-related improvement on the way to their AMDGPU kernel graphics driver is exposing the Gamma 2.4 and Gamma 2.6 curves support.

Stemming from the Display Next Hackfest 2026 that took place last month in France, there was interest expressed from unspecified parties in seeing AMD hardware exposing their gamma 2.4 and 2.6 curves under Linux. Patches sent out yesterday make that a reality for the AMDGPU Linux driver.

The AMDGPU driver currently exposes the standard gamma 2.2 support as is the standard gamma curve. Gamma 2.4 is popular in the movie and TV industries for higher contrast and viewing experience in the living room. Gamma 2.6 is the official standard for digital cinema and theatrical movie production with its deeper shadows and saturation for better cinema reproduction.

With the patches sent out yesterday, the AMDGPU Linux driver is exposing Gamma 2.4 and Gamma 2.6 plus both of their inverse curves too. It's a straight-forward addition with adding this Gamma 2.4 and Gamma 2.6 support found with modern AMD graphics processors and [2]the patches will presumably be picked up in time for the Linux v7.3 kernel later in the year.



[1] https://www.phoronix.com/news/Linux-7.2-DRM

[2] https://lore.kernel.org/dri-devel/20260623183155.212394-1-harry.wentland@amd.com/T/