drm/virtio: implement blob resources: expose virtio_gpu_resource_id_get

VRAM object will need it.
Signed-off-by: Gurchetan Singh <gurchetansingh@chromium.org>
Acked-by: Tomeu Vizoso <tomeu.vizoso@collabora.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20200924003214.662-10-gurchetansingh@chromium.orgSigned-off-by: Gerd Hoffmann <kraxel@redhat.com>

drivers/gpu/drm/virtio/virtgpu_drv.h

@@ -384,6 +384,8 @@ int virtio_gpu_object_create(struct virtio_gpu_device *vgdev,
 
 bool virtio_gpu_is_shmem(struct virtio_gpu_object *bo);
 
+int virtio_gpu_resource_id_get(struct virtio_gpu_device *vgdev,
+			       uint32_t *resid);
 /* virtgpu_prime.c */
 struct dma_buf *virtgpu_gem_prime_export(struct drm_gem_object *obj,
 					 int flags);

drivers/gpu/drm/virtio/virtgpu_object.c

@@ -31,8 +31,7 @@
 static int virtio_gpu_virglrenderer_workaround = 1;
 module_param_named(virglhack, virtio_gpu_virglrenderer_workaround, int, 0400);
 
-static int virtio_gpu_resource_id_get(struct virtio_gpu_device *vgdev,
-				       uint32_t *resid)
+int virtio_gpu_resource_id_get(struct virtio_gpu_device *vgdev, uint32_t *resid)
 {
 	if (virtio_gpu_virglrenderer_workaround) {
 		/*