From 897110eed5084bb91731fd4e2bdcf5f536eaadfd Mon Sep 17 00:00:00 2001 From: HaiJun Chang Date: Tue, 29 Oct 2019 15:44:08 +0800 Subject: [PATCH] drm/amdgpu: fix gfx VF FLR test fail on navi Cp wptr in wb buffer is outdated after VF FLR. The outdated wptr may cause cp to execute unexpected packets.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 Acked-by: Alex Deucher Signed-off-by: Alex Deucher --- drivers/gpu/drm/amd/amdgpu/gfx_v10_0.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/gpu/drm/amd/amdgpu/gfx_v10_0.c b/drivers/gpu/drm/amd/amdgpu/gfx_v10_0.c index 959f5be75f8c..e7bab4f094b3 100644 --- a/drivers/gpu/drm/amd/amdgpu/gfx_v10_0.c +++ b/drivers/gpu/drm/amd/amdgpu/gfx_v10_0.c @@ -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); -- 2.11.0