drm/amdgpu: fix a potential GPU hang on cyan skillfish

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We observed a GPU hang when querying GMC CG state(i.e.,
cat amdgpu_pm_info) on cyan skillfish. Acctually, cyan
skillfish doesn't support any CG features.

Just prevent it from accessing GMC CG registers.

Signed-off-by: Lang Yu <Lang.Yu@amd.com>
Reviewed-by: Lijo Lazar <lijo.lazar@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

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Lang Yu 2022-01-28 18:24:53 +08:00 • committed by Alex Deucher

parent d2a197a45d

commit d2895ec4ca

1 changed files with 3 additions and 0 deletions

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drivers/gpu/drm/amd/amdgpu/gmc_v10_0.c

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