}
EXTERN tdm_error
+tdm_backend_register_func_voutput(tdm_display *dpy, tdm_func_voutput *func_voutput)
+{
+ tdm_backend_module *module;
+
+ TDM_RETURN_VAL_IF_FAIL(TDM_MUTEX_IS_LOCKED(), TDM_ERROR_OPERATION_FAILED);
+
+ BACKEND_FUNC_ENTRY();
+
+ TDM_RETURN_VAL_IF_FAIL(func_voutput != NULL, TDM_ERROR_INVALID_PARAMETER);
+
+ assert(private_display->current_module);
+
+ /* the ABI version of backend module should be more than 1.1 */
+ module = private_display->current_module->module_data;
+ if (_check_abi_version(module, 1, 1) < 0)
+ return TDM_ERROR_BAD_MODULE;
+
+ private_display->current_module->func_voutput = *func_voutput;
+
+ return TDM_ERROR_NONE;
+}
+
+
+EXTERN tdm_error
tdm_backend_register_func_layer(tdm_display *dpy, tdm_func_layer *func_layer)
{
tdm_backend_module *module;