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drm/amdgpu: Avoid accessing HW when suspending SW state

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At this point the ASIC is already post reset by the HW/PSP
so the HW not in proper state to be configured for suspension,
some blocks might be even gated and so best is to avoid touching it.

v2: Rename in_dpc to more meaningful name

Signed-off-by: Andrey Grodzovsky <andrey.grodzovsky@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Andrey Grodzovsky
2020-07-29 13:10:29 -04:00
committed by Alex Deucher
parent c9a6b82f45
commit bf36b52e78
6 changed files with 65 additions and 7 deletions
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6
drivers/gpu/drm/amd/amdgpu/amdgpu_gfx.c
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@@ -693,6 +693,9 @@ uint32_t amdgpu_kiq_rreg(struct amdgpu_device *adev, uint32_t reg)
struct amdgpu_kiq *kiq = &adev->gfx.kiq;
struct amdgpu_ring *ring = &kiq->ring;
if (adev->in_pci_err_recovery)
return 0;
BUG_ON(!ring->funcs->emit_rreg);
spin_lock_irqsave(&kiq->ring_lock, flags);
@@ -757,6 +760,9 @@ void amdgpu_kiq_wreg(struct amdgpu_device *adev, uint32_t reg, uint32_t v)
BUG_ON(!ring->funcs->emit_wreg);
if (adev->in_pci_err_recovery)
return;
spin_lock_irqsave(&kiq->ring_lock, flags);
amdgpu_ring_alloc(ring, 32);
amdgpu_ring_emit_wreg(ring, reg, v);