drm/amd/pm: avoid duplicate powergate/ungate setting

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Just bail out if the target IP block is already in the desired
powergate/ungate state. This can avoid some duplicate settings
which sometimes may cause unexpected issues.

Link: https://lore.kernel.org/all/YV81vidWQLWvATMM@zn.tnic/
Bug: https://bugzilla.kernel.org/show_bug.cgi?id=214921
Bug: https://bugzilla.kernel.org/show_bug.cgi?id=215025
Bug: https://gitlab.freedesktop.org/drm/amd/-/issues/1789
Signed-off-by: Evan Quan <evan.quan@amd.com>
Tested-by: Borislav Petkov <bp@suse.de>
Reviewed-by: Lijo Lazar <lijo.lazar@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

...

This commit is contained in:

Evan Quan 2021-11-05 15:25:30 +08:00 • committed by Alex Deucher

parent ed12f3f198

commit 6c08e0ef87

4 changed files with 23 additions and 1 deletions

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3

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

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3

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

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10

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

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8

drivers/gpu/drm/amd/pm/inc/amdgpu_dpm.h

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