linux-drivers/
drivers/platform/x86/amd

AMD Ryzen and EPYC platform management drivers

AMD-specific platform glue for modern Ryzen laptops and desktops and EPYC servers: the Power Management Controller for modern-standby, the Platform Management Framework for thermal and power policy, hardware feedback for heterogeneous cores, host system-management on EPYC and MI300A, 3D V-Cache scheduling hints, Wi-Fi band restriction, and the ISP4 image signal processor.

keep conf=0.93 deploy=medium replacement=none subsystem=platform category=platform-vendor
93%

recommendation

It should stay because this directory covers actively shipping AMD silicon — Ryzen AI 300 and 400 series mobile chips announced in 2025 and 2026, current X3D desktop CPUs, and EPYC/MI300A servers — and the code is seeing substantive upstream commits in 2025–2026 adding new ACPI IDs, quirks, and platform enablement. There is no sign of a removal effort; this is core enablement for hardware sold new today.

repository signals

32 files
9,701 source lines
318 commits, 5y
+12,921 / −2,987 lines added / removed, 5y
50 authors, 5y
monthly commits · 2021-04-21 → 2026-04-21 · 318 total · active in 45/61 months
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sources

  1. cateee.net

    AMD PMC is a current upstream kernel option, present through 6.19/7.0, and explicitly targets AMD Ryzen notebook platforms for S2Idle/SMU power-management support.

  2. cateee.net

    AMD PMF is current upstream support for AMD Platform Management Framework, with device IDs including Phoenix, Strix/Strix Halo, and Krackan root complexes.

  3. cateee.net

    AMD HFI is a recent upstream addition for heterogeneous-core hardware feedback on AMD systems, present in 6.17+.

  4. cateee.net

    AMD HSMP ACPI support is current upstream support for EPYC and MI300A server system-management functionality.

  5. amd.com

    AMD announced Ryzen AI 300 / PRO and Ryzen AI Max / PRO mobile PC processors for 2025 availability, showing this platform class was actively sold new in 2025.

  6. amd.com

    AMD announced Ryzen AI 400 / PRO 400 and new X3D client CPUs in January 2026, reinforcing that the client platform families covered by this directory remain current rather than legacy.

codex reasoning notes (technical)

Local `exec_command` inspection showed this is a real driver directory with active subdrivers (pmc, pmf, hfi, hsmp, x3d_vcache, wbrf, isp4). Local `git -c safe.directory=... log` showed many substantive 2025-2026 changes, including new quirks, ACPI IDs, HFI work, and current-platform enablement, which argues strongly against deprecation. `web.search_query` retrieved LKDDb pages for AMD_PMC/PMF/HFI/HSMP and AMD press releases for Ryzen AI 300/400. I did not find evidence of an active removal/deprecation series in the allotted lore lookup path; with fresh upstream activity and currently sold AMD client/server platforms, the correct outcome is keep.