drm/virtio: Don't create a context with default param if context_init…

… is supported

Xorg context creation fails for native contexts that use
VIRTGPU_CONTEXT_INIT because context is already initialized implicitly
when dumb buffer is created. Fix it by not creating default vrend context
if context_init is supported.

Signed-off-by: Pierre-Eric Pelloux-Prayer <pierre-eric.pelloux-prayer@amd.com>
Signed-off-by: Dmitry Osipenko <dmitry.osipenko@collabora.com>
Reviewed-by: Rob Clark <robdclark@gmail.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20241020224725.179937-1-dmitry.osipenko@collabora.com

drivers/gpu/drm/virtio/virtgpu_gem.c

@@ -112,15 +112,17 @@ int virtio_gpu_gem_object_open(struct drm_gem_object *obj,
 	/* the context might still be missing when the first ioctl is
 	 * DRM_IOCTL_MODE_CREATE_DUMB or DRM_IOCTL_PRIME_FD_TO_HANDLE
 	 */
-	virtio_gpu_create_context(obj->dev, file);
+	if (!vgdev->has_context_init)
+		virtio_gpu_create_context(obj->dev, file);
 
 	objs = virtio_gpu_array_alloc(1);
 	if (!objs)
 		return -ENOMEM;
 	virtio_gpu_array_add_obj(objs, obj);
 
-	virtio_gpu_cmd_context_attach_resource(vgdev, vfpriv->ctx_id,
-					       objs);
+	if (vfpriv->ctx_id)
+		virtio_gpu_cmd_context_attach_resource(vgdev, vfpriv->ctx_id, objs);
+
 out_notify:
 	virtio_gpu_notify(vgdev);
 	return 0;