AMD SMU14 power management for Radeon RX 9000 GPUs
Power, clocking, and thermal management for AMD's newest Radeon GPUs that use the SMU14 system-management controller, including the RDNA 4 / GFX12 generation such as the Radeon RX 9070 XT released in 2025. It is the firmware-talking layer that handles frequencies, voltages, fan curves, and overclocking knobs on these cards.
recommendation
It should stay because this is the power-management layer for AMD's current-generation Radeon GPUs, including the RX 9000 series that AMD was still selling new in 2025. Upstream activity is healthy, with refactors landing in late 2025 and firmware-handling fixes flowing into stable kernels in early 2026, so this is mainstream, actively maintained code rather than legacy support.
repository signals
sources
- git.kernel.org
The directory is built as the SMU14 manager inside AMDGPU powerplay, so it is live kernel driver code, not dead support scaffolding.
- git.kernel.org
AMDGPU discovery wires MP1 IP versions 14.0.x to `smu_v14_0_ip_block`, and the same file maps current GC12-class devices in this part of the stack.
- spinics.net
A December 2025 amd-gfx patch series refactored SMUv14 internals, showing active upstream development rather than retirement planning.
- mail-archive.com
A March 2026 patch updated SMUv14 firmware-version checking, indicating ongoing maintenance after the initial bring-up period.
- opennet.ru
Linux stable carried a March 2026 SMUv14 fix (`PP_OD_FEATURE_ZERO_FAN_BIT`), which is strong evidence of active field use and bug-fix traffic.
- amd.com
AMD was still selling new Radeon RX 9000-series hardware in 2025/2026, so SMU14-backed hardware is not obsolete inventory only.
codex reasoning notes (technical)
Local shell `rg`/`sed` inspection showed this directory is the SMU14 power-management part of AMDGPU and that discovery code binds MP1 14.0.x into the live driver; I mapped those local file paths to canonical git.kernel.org tree URLs by canonical recall. Web search found current amd-gfx patch mirrors on Spinics and Mail-Archive plus a 2026 stable changelog entry and AMD's RX 9070 XT product page. Evidence points to an actively maintained, currently shipped hardware family with no removal signal, so `keep` is the defensible recommendation.