drm/amd/pm: zero unused SMU argument registers

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SMU messages may use fewer arguments than the available argument registers,
the previous code only wrote used registers and left the rest unchanged,
so stale values from a prior message could persist.

Write all argument registers for each message and zero the unused tail
to keep command arguments deterministic and avoid unintended carry-over.

Signed-off-by: Yang Wang <kevinyang.wang@amd.com>
Reviewed-by: Asad Kamal <asad.kamal@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
(cherry picked from commit e03b635f61)

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Yang Wang 2026-05-11 16:33:37 +08:00 • committed by Alex Deucher

parent ee193c5bbd

commit a169b326ba

1 changed files with 6 additions and 2 deletions

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

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