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drm/amd/pm: Enable performance determinism on aldebaran

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Performance Determinism is a new mode in Aldebaran where PMFW tries to
maintain sustained performance level. It can be enabled on a per-die
basis on aldebaran. To guarantee that it remains within the power cap,
a max GFX frequency needs to be specified in this mode. A new
power_dpm_force_performance_level, "perf_determinism", is defined to enable
this mode in amdgpu. The max frequency (in MHz) can be specified through
pp_dpm_sclk. The mode will be disabled once any other performance level
is chosen.

Ex: To enable perf determinism at 900Mhz max gfx clock

echo perf_determinism > /sys/bus/pci/devices/.../power_dpm_force_performance_level
echo max 900 > /sys/bus/pci/devices/.../pp_dpm_sclk

Signed-off-by: Lijo Lazar <lijo.lazar@amd.com>
Reviewed-by: Kenneth Feng <kenneth.feng@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Lijo Lazar
2021-03-05 16:02:49 -05:00
committed by Alex Deucher
parent 26256ca8a6
commit 6be6424684
4 changed files with 150 additions and 4 deletions
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1
drivers/gpu/drm/amd/include/kgd_pp_interface.h
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@@ -48,6 +48,7 @@ enum amd_dpm_forced_level {
AMD_DPM_FORCED_LEVEL_PROFILE_MIN_MCLK = 0x40,
AMD_DPM_FORCED_LEVEL_PROFILE_PEAK = 0x80,
AMD_DPM_FORCED_LEVEL_PROFILE_EXIT = 0x100,
AMD_DPM_FORCED_LEVEL_PERF_DETERMINISM = 0x200,
};
enum amd_pm_state_type {