AMD is developing an official overclocking driver for Ryzen processors on Linux, according to Phoronix. Engineer Shyam Sundar S K has submitted a three-patch series for a new driver called AOD (AMD Overclocking Driver) to the platform-driver-x86 mailing list. The WMI driver communicates with the same firmware interface as Ryzen Master on Windows, exposing controls through sysfs.
Initial implementation covers PPT, TDC, and EDC limits with their supported ranges, a platform-level SMT toggle, and read-only memory clock readout. Notably, Ryzen Master itself won't be ported to Linux. AMD is following its amdgpu driver approach, handling kernel-side functionality while leaving GUI development to third-party tools like Core Ctrl and desktop environments.
Power limit changes persist in firmware but require a reboot to activate, unlike AMD's existing HSMP interface that applies limits instantly. The AOD attributes are write-only since firmware doesn't report current values. The SMT switch behaves more like a BIOS option than the kernel's nosmt boot parameter.
Firmware supports additional commands beyond initial patches, suggesting expanded controls may arrive. Patches remain under review with no timeline for kernel integration yet.
Source: TechPowerUp News · Summarized by HeadlinesBriefing