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 <yt...@amd.com>
---
drivers/gpu/drm/amd/amdgpu/gfx_v10_0.c | 1 +
drivers/gpu/drm/amd/amdgpu/gfx_v9_0.c | 1 +
2 files changed, 2 insertions(+)
diff --git a/drivers/gpu/drm/amd/amdgpu/gfx_v10_0.c
b/drivers/gpu/drm/amd/amdgpu/gfx_v10_0.c
index 44f00ecea322..5df1a6d45457 100644
--- a/drivers/gpu/drm/amd/amdgpu/gfx_v10_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/gfx_v10_0.c
@@ -3508,6 +3508,7 @@ static int gfx_v10_0_kcq_init_queue(struct amdgpu_ring
*ring)
/* reset ring buffer */
ring->wptr = 0;
+ atomic64_set((atomic64_t *)&adev->wb.wb[ring->wptr_offs], 0);
amdgpu_ring_clear_ring(ring);
} else {
amdgpu_ring_clear_ring(ring);
diff --git a/drivers/gpu/drm/amd/amdgpu/gfx_v9_0.c
b/drivers/gpu/drm/amd/amdgpu/gfx_v9_0.c
index 4135e4126e82..ac22490e8656 100644
--- a/drivers/gpu/drm/amd/amdgpu/gfx_v9_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/gfx_v9_0.c
@@ -3664,6 +3664,7 @@ static int gfx_v9_0_kcq_init_queue(struct amdgpu_ring
*ring)
/* reset ring buffer */
ring->wptr = 0;
+ atomic64_set((atomic64_t *)&adev->wb.wb[ring->wptr_offs], 0);
amdgpu_ring_clear_ring(ring);
} else {
amdgpu_ring_clear_ring(ring);
--
2.17.1
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