drm/amdgpu: add need backup function V2

V2:
add checking if need backup in amdgpu_bo_create.
Signed-off-by: Chunming Zhou <David1.Zhou@amd.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/amdgpu/amdgpu.h

@@ -2376,6 +2376,7 @@ amdgpu_get_sdma_instance(struct amdgpu_ring *ring)
 
 /* Common functions */
 int amdgpu_gpu_reset(struct amdgpu_device *adev);
+bool amdgpu_need_backup(struct amdgpu_device *adev);
 void amdgpu_pci_config_reset(struct amdgpu_device *adev);
 bool amdgpu_card_posted(struct amdgpu_device *adev);
 void amdgpu_update_display_priority(struct amdgpu_device *adev);

drivers/gpu/drm/amd/amdgpu/amdgpu_device.c

@@ -2049,6 +2049,14 @@ static int amdgpu_post_soft_reset(struct amdgpu_device *adev)
 	return 0;
 }
 
+bool amdgpu_need_backup(struct amdgpu_device *adev)
+{
+	if (adev->flags & AMD_IS_APU)
+		return false;
+
+	return amdgpu_lockup_timeout > 0 ? true : false;
+}
+
 /**
  * amdgpu_gpu_reset - reset the asic
  *

drivers/gpu/drm/amd/amdgpu/amdgpu_object.c

@@ -436,7 +436,7 @@ int amdgpu_bo_create(struct amdgpu_device *adev,
 	if (r)
 		return r;
 
-	if (flags & AMDGPU_GEM_CREATE_SHADOW) {
+	if (amdgpu_need_backup(adev) && (flags & AMDGPU_GEM_CREATE_SHADOW)) {
 		r = amdgpu_bo_create_shadow(adev, size, byte_align, (*bo_ptr));
 		if (r)
 			amdgpu_bo_unref(bo_ptr);