drm/virtio: factor out virtio_gpu_update_dumb_bo

No functional change.
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Reviewed-by: Gurchetan Singh <gurchetansingh@chromium.org>
Link: http://patchwork.freedesktop.org/patch/msgid/20191023062539.11728-4-kraxel@redhat.com

drivers/gpu/drm/virtio/virtgpu_plane.c

@@ -102,6 +102,25 @@ static int virtio_gpu_plane_atomic_check(struct drm_plane *plane,
 	return ret;
 }
 
+static void virtio_gpu_update_dumb_bo(struct virtio_gpu_device *vgdev,
+				      struct virtio_gpu_object *bo,
+				      struct drm_plane_state *state)
+{
+	struct virtio_gpu_object_array *objs;
+
+	objs = virtio_gpu_array_alloc(1);
+	if (!objs)
+		return;
+	virtio_gpu_array_add_obj(objs, &bo->base.base);
+	virtio_gpu_cmd_transfer_to_host_2d
+		(vgdev, 0,
+		 state->src_w >> 16,
+		 state->src_h >> 16,
+		 state->src_x >> 16,
+		 state->src_y >> 16,
+		 objs, NULL);
+}
+
 static void virtio_gpu_primary_plane_update(struct drm_plane *plane,
 					    struct drm_plane_state *old_state)
 {
@@ -129,21 +148,8 @@ static void virtio_gpu_primary_plane_update(struct drm_plane *plane,
 
 	vgfb = to_virtio_gpu_framebuffer(plane->state->fb);
 	bo = gem_to_virtio_gpu_obj(vgfb->base.obj[0]);
-	if (bo->dumb) {
-		struct virtio_gpu_object_array *objs;
-
-		objs = virtio_gpu_array_alloc(1);
-		if (!objs)
-			return;
-		virtio_gpu_array_add_obj(objs, vgfb->base.obj[0]);
-		virtio_gpu_cmd_transfer_to_host_2d
-			(vgdev, 0,
-			 plane->state->src_w >> 16,
-			 plane->state->src_h >> 16,
-			 plane->state->src_x >> 16,
-			 plane->state->src_y >> 16,
-			 objs, NULL);
-	}
+	if (bo->dumb)
+		virtio_gpu_update_dumb_bo(vgdev, bo, plane->state);
 
 	DRM_DEBUG("handle 0x%x, crtc %dx%d+%d+%d, src %dx%d+%d+%d\n",
 		  bo->hw_res_handle,