drm/amd/pm: Enable performance determinism on aldebaran

Browse source

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

Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL

Download patch file Download diff file Expand all files Collapse all files

1

drivers/gpu/drm/amd/include/kgd_pp_interface.h

View file

88

drivers/gpu/drm/amd/pm/amdgpu_pm.c

View file

6

drivers/gpu/drm/amd/pm/swsmu/amdgpu_smu.c

View file

59

drivers/gpu/drm/amd/pm/swsmu/smu13/aldebaran_ppt.c

View file