drm/amd/pm: account for OD percentage in effective PPT limits

Browse source

SMU 13.0.0, SMU 13.0.7, and SMU 14.0.2 represent limits above the
message limit as a base value plus an overdrive percentage. GetPptLimit
returns only the base, which causes two incorrect results:

- hwmon reports the message limit instead of the effective limit.
- Lowering the cap can leave the previous OD percentage active.

Export the active overdrive table from PMFW and combine its PPT
percentage with the message result. Use the exported percentage to clear
OD state before programming a limit within the message range.

Signed-off-by: Yang Wang <kevinyang.wang@amd.com>
Reviewed-by: Kenneth Feng <kenneth.feng@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

...

This commit is contained in:

Yang Wang 2026-07-31 06:11:42 +08:00 • committed by Alex Deucher

parent c0122bf2cc

commit 93bd6de551

3 changed files with 65 additions and 42 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

35

drivers/gpu/drm/amd/pm/swsmu/smu13/smu_v13_0_0_ppt.c

View file

35

drivers/gpu/drm/amd/pm/swsmu/smu13/smu_v13_0_7_ppt.c

View file

37

drivers/gpu/drm/amd/pm/swsmu/smu14/smu_v14_0_2_ppt.c

View file