drm/amdgpu: Enable light SBR for SMU on passthrough and XGMI configuration

SMU introduce the new interface to enable light Secondary Bus Reset mode, driver
enable it on passthrough + XGMI configuration
Signed-off-by: shaoyunl <shaoyun.liu@amd.com>
Reviewed-by: Evan Quan <evan.quan@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

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

@@ -3615,6 +3615,10 @@ int amdgpu_device_init(struct amdgpu_device *adev,
 	if (amdgpu_device_cache_pci_state(adev->pdev))
 		pci_restore_state(pdev);
 
+	/* Enable lightSBR on SMU in passthrough + xgmi configuration */
+	if (amdgpu_passthrough(adev) && adev->gmc.xgmi.num_physical_nodes > 1)
+		smu_set_light_sbr(&adev->smu, true);
+
 	if (adev->gmc.xgmi.pending_reset)
 		queue_delayed_work(system_wq, &mgpu_info.delayed_reset_work,
 				   msecs_to_jiffies(AMDGPU_RESUME_MS));