drm/amd/powerplay: add sensor lock support for smu

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when multithreading access sysfs of amdgpu_pm_info at the sametime.
the swsmu driver cause smu firmware hang.

eg:
single thread access:
Message A + Param A ==> right
Message B + Param B ==> right
Message C + Param C ==> right
multithreading access:
Message A + Param B ==> error
Message B + Param A ==> error
Message C + Param C ==> right

the patch will add sensor lock(mutex) to avoid this error.

Signed-off-by: Kevin Wang <kevin1.wang@amd.com>
Reviewed-by: Kenneth Feng <kenneth.feng@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

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Kevin Wang 2019-09-26 16:22:13 +08:00 • committed by Alex Deucher

parent 64e51a1b55

commit 95f71bfad2

5 changed files with 9 additions and 0 deletions

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2

drivers/gpu/drm/amd/powerplay/amdgpu_smu.c

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drivers/gpu/drm/amd/powerplay/arcturus_ppt.c

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1

drivers/gpu/drm/amd/powerplay/inc/amdgpu_smu.h

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drivers/gpu/drm/amd/powerplay/navi10_ppt.c

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drivers/gpu/drm/amd/powerplay/vega20_ppt.c

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