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drm/amdgpu: refine the logic in amdgpu_need_post()

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We check the mem config register to make sure it's been
programmed by the vbios to determine if we need to post
so we check for a non-0 value.  However, when the asic
comes out of reset, we may see all ones here, so check
for that too.

Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Alex Deucher 2017-03-28 12:19:31 -04:00
parent e5f586c763
commit f2713e8c2a
1 changed files with 1 additions and 1 deletions
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2
drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
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@ -719,7 +719,7 @@ bool amdgpu_need_post(struct amdgpu_device *adev)
/* then check MEM_SIZE, in case the crtcs are off */
reg = amdgpu_asic_get_config_memsize(adev);
if (reg)
if ((reg != 0) && (reg != 0xffffffff))
return false;
return true;