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drm/amdgpu: fix gfx VF FLR test fail on navi

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Cp wptr in wb buffer is outdated after VF FLR.
The outdated wptr may cause cp to execute unexpected packets.
Reset cp wptr in wb buffer.

Signed-off-by: HaiJun Chang <HaiJun.Chang@amd.com>
Acked-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
HaiJun Chang 2019-10-29 15:44:08 +08:00 • committed by Alex Deucher
parent bff77e86a3
commit 897110eed5
1 changed files with 1 additions and 0 deletions
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drivers/gpu/drm/amd/amdgpu/gfx_v10_0.c
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@ -3106,6 +3106,7 @@ static int gfx_v10_0_gfx_init_queue(struct amdgpu_ring *ring)
memcpy(mqd, adev->gfx.me.mqd_backup[AMDGPU_MAX_GFX_RINGS], sizeof(*mqd));
/* reset the ring */
ring->wptr = 0;
adev->wb.wb[ring->wptr_offs] = 0;
amdgpu_ring_clear_ring(ring);
#ifdef BRING_UP_DEBUG
mutex_lock(&adev->srbm_mutex);