drm/amd/amdgpu: enable GUI idle INT after enabling CGCG

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GUI idle interrupts should be enabled only after we
have enabled coarse grain clock gating (CGCG). This
prevents GFX engine generating idle interrupt even
though CGCG is not completely enabled.

Most of the time this goes un-noticed, but on some
Stoney ASICs this results in GFX engine hang after
system resumes from suspend. The issue is not
particular to Stoney though and could have occured
on any ASIC. The patch fixes this issue.

Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Reported-by: Sunil Uttarwar <Sunil.Uttarwar1@amd.com>
Signed-off-by: Arindam Nath <arindam.nath@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org

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This commit is contained in:

Arindam Nath 2016-11-25 16:55:16 +05:30 • committed by Alex Deucher

parent ecc2cf7cc8

commit dd31ae9ac9

1 changed files with 9 additions and 9 deletions

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18

drivers/gpu/drm/amd/amdgpu/gfx_v8_0.c

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