cpufreq/amd-pstate: Fix a regression leading to EPP 0 after hibernate

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[ Upstream commit 85d7dda5a9 ]

After resuming from S4, all CPUs except the boot CPU have the wrong EPP
hint programmed.  This is because when the CPUs were offlined the EPP value
was reset to 0.

This is a similar problem as fixed by
commit ba3319e590 ("cpufreq/amd-pstate: Fix a regression leading to EPP
0 after resume") and the solution is also similar.  When offlining rather
than reset the values to zero, reset them to match those chosen by the
policy. When the CPUs are onlined again these values will be restored.

Closes: https://community.frame.work/t/increased-power-usage-after-resuming-from-suspend-on-ryzen-7040-kernel-6-15-regression/74531/20?u=mario_limonciello
Fixes: 608a76b652 ("cpufreq/amd-pstate: Add support for the "Requested CPU Min frequency" BIOS option")
Reviewed-by: Gautham R. Shenoy <gautham.shenoy@amd.com>
Signed-off-by: Mario Limonciello (AMD) <superm1@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

...

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Mario Limonciello (AMD) 2025-09-23 10:29:29 -05:00 • committed by Greg Kroah-Hartman

parent 46be1f5aae

commit 5944d1e910

1 changed files with 5 additions and 1 deletions

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drivers/cpufreq/amd-pstate.c

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