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From 986adea80905c6b7232acd8b5dc702c39fb40c3e Mon Sep 17 00:00:00 2001
From: Le Ma <le.ma@amd.com>
Date: Fri, 25 Oct 2019 16:50:53 +0800
Subject: [PATCH 4312/4736] drm/amdgpu: clear UVD VCPU buffer when
err_event_athub generated
The err_event_athub error will mess up the buffer and cause UVD resume hang.
Change-Id: If17a2161fb9b1b52eac08de00d2e935191bdbf99
Signed-off-by: Le Ma <le.ma@amd.com>
Reviewed-by: Hawking Zhang <hawking.zhang@amd.com>
---
drivers/gpu/drm/amd/amdgpu/amdgpu_uvd.c | 10 +++++++++-
1 file changed, 9 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_uvd.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_uvd.c
index 4e5d13e41f6a..d1b10b5583ec 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_uvd.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_uvd.c
@@ -39,6 +39,8 @@
#include "cikd.h"
#include "uvd/uvd_4_2_d.h"
+#include "amdgpu_ras.h"
+
/* 1 second timeout */
#define UVD_IDLE_TIMEOUT msecs_to_jiffies(1000)
@@ -372,7 +374,13 @@ int amdgpu_uvd_suspend(struct amdgpu_device *adev)
if (!adev->uvd.inst[j].saved_bo)
return -ENOMEM;
- memcpy_fromio(adev->uvd.inst[j].saved_bo, ptr, size);
+ /* re-write 0 since err_event_athub will corrupt VCPU buffer */
+ if (amdgpu_ras_intr_triggered()) {
+ DRM_WARN("UVD VCPU state may lost due to RAS ERREVENT_ATHUB_INTERRUPT\n");
+ memset(adev->uvd.inst[j].saved_bo, 0, size);
+ } else {
+ memcpy_fromio(adev->uvd.inst[j].saved_bo, ptr, size);
+ }
}
return 0;
}
--
2.17.1
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