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drm/amdgpu: add pipeline sync for compute job 

hardware ring is async processed, the job is executed in parallel.
In some case, this will result vm fault, like jobs with different vmids.

This works around a CPC hw issue which will eventually be fixed in fw.

Signed-off-by: Chunming Zhou <David1.Zhou@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Monk Liu <monk.liu@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Chunming Zhou 2016-04-27 18:07:41 +08:00 committed by Alex Deucher
parent c5637837ba
commit fe70766487
1 changed files with 2 additions and 1 deletions
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3
drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
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@ -300,7 +300,8 @@ int amdgpu_vm_flush(struct amdgpu_ring *ring,
int r;
if (ring->funcs->emit_pipeline_sync && (
pd_addr != AMDGPU_VM_NO_FLUSH || gds_switch_needed))
pd_addr != AMDGPU_VM_NO_FLUSH || gds_switch_needed ||
ring->type == AMDGPU_RING_TYPE_COMPUTE))
amdgpu_ring_emit_pipeline_sync(ring);
if (ring->funcs->emit_vm_flush &&