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| author | Mario Limonciello (AMD) <superm1@kernel.org> | 2026-03-29 15:38:07 -0500 |
|---|---|---|
| committer | Mario Limonciello (AMD) <superm1@kernel.org> | 2026-04-02 11:29:02 -0500 |
| commit | e30ca6dd5345c5b8ba05f346a8e81105352fe571 (patch) | |
| tree | 751cb69f5363db19492b53fad8e0991e76a4acc1 /Documentation/controllers/git@git.tavy.me:linux.git | |
| parent | a362ae6e7e85bca4c870c37085d7793c4beec360 (diff) | |
cpufreq/amd-pstate: Add dynamic energy performance preference
Dynamic energy performance preference changes the EPP profile based on
whether the machine is running on AC or DC power.
A notification chain from the power supply core is used to adjust EPP
values on plug in or plug out events.
When enabled, the driver exposes a sysfs toggle for dynamic EPP, blocks
manual writes to energy_performance_preference while it "owns" the EPP
updates.
For non-server systems:
* the default EPP for AC mode is `performance`.
* the default EPP for DC mode is `balance_performance`.
For server systems dynamic EPP is mostly a no-op.
Reviewed-by: Gautham R. Shenoy <gautham.shenoy@amd.com>
Signed-off-by: Mario Limonciello (AMD) <superm1@kernel.org>
Diffstat (limited to 'Documentation/controllers/git@git.tavy.me:linux.git')
0 files changed, 0 insertions, 0 deletions