drm/amdgpu: clean wptr on wb when gpu recovery

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The TDR will be randomly failed due to compute ring
test failure. If the compute ring wptr & 0x7ff(ring_buf_mask)
is 0x100 then after map mqd the compute ring rptr will be
synced with 0x100. And the ring test packet size is also 0x100.
Then after invocation of amdgpu_ring_commit, the cp will not
really handle the packet on the ring buffer because rptr is equal to wptr.

Signed-off-by: Yintian Tao <yttao@amd.com>
Acked-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Monk Liu <Monk.Liu@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

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Yintian Tao 2020-02-28 14:24:42 +08:00 • committed by Alex Deucher

parent eb696d041f

commit 1d21a84661

2 changed files with 2 additions and 0 deletions

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1

drivers/gpu/drm/amd/amdgpu/gfx_v10_0.c

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1

drivers/gpu/drm/amd/amdgpu/gfx_v9_0.c

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