Internal support code within the AMDGPU graphics stack that talks to the on-GPU System Management Unit firmware to control clock speeds, voltages, fan curves, and power states on AMD Radeon and Instinct GPUs from Vega onward. It is a sub-component of the AMD DRM driver, not a piece of hardware support on its own.
This is not actually a standalone driver directory; it is the shared System Management Unit (SMU) firmware-interface code used by the main AMDGPU graphics driver to handle power, clocking, and thermal management on modern Radeon GPUs. It lives inside the AMD DRM stack as supporting infrastructure rather than as a separately loadable hardware driver.
repository signals
104files
72,766source lines
1,271commits, 5y
+69,091 / −18,190lines added / removed, 5y
125authors, 5y
monthly commits · 2021-04-21 → 2026-04-21 · 1,271 total · active in 60/61 months
sources
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codex reasoning notes (technical)
Not a driver directory: contains AMDGPU power-management SMU support code within the DRM stack, not a standalone kernel-bound hardware driver.