debug for vblank and fence timeout

Signed-off-by: Xue, Bosheng <bosheng.xue@intel.com>

Author: bosheng1

drivers/gpu/drm/virtio/virtgpu_display.c

@@ -497,10 +497,12 @@ virtio_gpu_wait_for_vblanks(struct drm_device *dev,
 					(vgdev->has_vblank && vgdev->has_flip_sequence ?
 						atomic64_read(&vgdev->flip_sequence[i]) :
 						drm_crtc_vblank_count(crtc)),
-				msecs_to_jiffies(100));
+				msecs_to_jiffies(500));
 
-		WARN(!ret, "[CRTC:%d:%s] vblank wait timed out\n",
-		     crtc->base.id, crtc->name);
+	//	WARN(!ret, "[CRTC:%d:%s] vblank wait timed out\n",
+	//	     crtc->base.id, crtc->name);
+		if (ret == 0)
+			pr_err("bosheng wait vblank timeout\n");
 
 		drm_crtc_vblank_put(crtc);
 	}

drivers/gpu/drm/virtio/virtgpu_plane.c

@@ -349,6 +349,7 @@ static void virtio_gpu_resource_flush(struct drm_plane *plane,
 	struct virtio_gpu_framebuffer *vgfb;
 	struct virtio_gpu_plane_state *vgplane_st;
 	struct virtio_gpu_object *bo;
+	int ret = 0;
 
 	vgfb = to_virtio_gpu_framebuffer(plane->state->fb);
 	vgplane_st = to_virtio_gpu_plane_state(plane->state);
@@ -365,8 +366,10 @@ static void virtio_gpu_resource_flush(struct drm_plane *plane,
 					      width, height, objs,
 					      vgplane_st->fence);
 		virtio_gpu_notify(vgdev);
-		dma_fence_wait_timeout(&vgplane_st->fence->f, true,
+		ret = dma_fence_wait_timeout(&vgplane_st->fence->f, true,
 				       msecs_to_jiffies(50));
+		if (ret <= 0)
+			printk("bosheng resource flush timeout ret:%d\n", ret);
 	} else {
 		virtio_gpu_cmd_resource_flush(vgdev, bo->hw_res_handle, x, y,
 					      width, height, NULL, NULL);