Krzysztof Wilczyński kwilczynski
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kwilczynski
/ 9002-platform-x86-amd-pmc-ms-s1-max-lps0-quirk.patch
Created
October 8, 2026 22:27
— forked from hjanuschka/9002-platform-x86-amd-pmc-ms-s1-max-lps0-quirk.patch
amd_pmc: skip LPS0 handler on MINISFORUM MS-S1 MAX (firmware only implements Microsoft LPS0 _DSM via SMI; OS_HINT hangs s2idle)
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| From: Helmut Januschka <helmut@januschka.com> | |
| Subject: [PATCH] platform/x86/amd/pmc: firmware-handled LPS0 quirk for MINISFORUM MS-S1 MAX | |
| The MINISFORUM MS-S1 MAX (SHWSA, Strix Halo) ships firmware whose LPS0 | |
| PEP device only implements the Microsoft _DSM UUID; its entry/exit | |
| functions trap into SMM (port 0xB2, 0xEA/0xEB) and perform the platform | |
| sleep handshake there. The AMD _DSM UUID advertises no entry/exit | |
| functions at all (function mask 0x3). | |
| When amd_pmc additionally sends OS_HINT, s2idle never resumes: with both |