From: Chunming Zhou <David1.Zhou@xxxxxxx>
On workstation cards with ECC vram, the entirety of vram is cleared to 0
on asic init to set the ECC status correctly. On non ECC boards, I don't
think they do any explicit clearing, but the vram controller is reset
which may cause issues with the data there.
Signed-off-by: Chunming Zhou <David1.Zhou at amd.com>
Reviewed-by: Alex Deucher <alexander.deucher at amd.com>
Signed-off-by: Alex Deucher <alexander.deucher at amd.com>
---
drivers/gpu/drm/amd/amdgpu/amdgpu_device.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
index 2193c98..000a9d1 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
@@ -1959,6 +1959,9 @@ int amdgpu_gpu_reset(struct amdgpu_device *adev)
atomic_inc(&adev->gpu_reset_counter);
+ /* evict vram memory */
+ amdgpu_bo_evict_vram(adev);
+
/* block scheduler */
for (i = 0; i < AMDGPU_MAX_RINGS; ++i) {
struct amdgpu_ring *ring = adev->rings[i];
@@ -1967,6 +1970,7 @@ int amdgpu_gpu_reset(struct amdgpu_device *adev)
continue;
kthread_park(ring->sched.thread);
}
+
/* block TTM */
resched = ttm_bo_lock_delayed_workqueue(&adev->mman.bdev);
/* store modesetting */
--
2.5.5
