Hi Dmitry, I love your patch! Perhaps something to improve: [auto build test WARNING on linus/master] [cannot apply to v5.4-rc3 next-20191014] [if your patch is applied to the wrong git tree, please drop us a note to help improve the system. BTW, we also suggest to use '--base' option to specify the base tree in git format-patch, please see https://stackoverflow.com/a/37406982] url: https://github.com/0day-ci/linux/commits/Dmitry-Torokhov/drm-bridge-ti-tf... config: nds32-allmodconfig (attached as .config) compiler: nds32le-linux-gcc (GCC) 8.1.0 reproduce: wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross # save the attached .config to linux build tree GCC_VERSION=8.1.0 make.cross ARCH=nds32 If you fix the issue, kindly add following tag Reported-by: kbuild test robot <lkp(a)intel.com&gt; All warnings (new ones prefixed by >>): drivers/gpu/drm/bridge/ti-tfp410.c: In function 'tfp410_get_connector_properties': drivers/gpu/drm/bridge/ti-tfp410.c:287:13: error: implicit declaration of function 'fwnode_gpiod_get_index'; did you mean 'devm_gpiod_get_index'? [-Werror=implicit-function-declaration] dvi->hpd = fwnode_gpiod_get_index(&connector_node->fwnode, ^~~~~~~~~~~~~~~~~~~~~~ devm_gpiod_get_index dvi->hpd = fwnode_gpiod_get_index(&connector_node->fwnode, ^ cc1: some warnings being treated as errors vim +287 drivers/gpu/drm/bridge/ti-tfp410.c 271 272 static int tfp410_get_connector_properties(struct tfp410 *dvi) 273 { 274 struct device_node *connector_node, *ddc_phandle; 275 int ret = 0; 276 277 /* port@1 is the connector node */ 278 connector_node = of_graph_get_remote_node(dvi->dev->of_node, 1, -1); 279 if (!connector_node) 280 return -ENODEV; 281 282 if (of_device_is_compatible(connector_node, "hdmi-connector")) 283 dvi->connector_type = DRM_MODE_CONNECTOR_HDMIA; 284 else 285 dvi->connector_type = DRM_MODE_CONNECTOR_DVID; 286 288 "hpd", 0, GPIOD_IN, "hpd"); 289 if (IS_ERR(dvi->hpd)) { 290 ret = PTR_ERR(dvi->hpd); 291 dvi->hpd = NULL; 292 if (ret == -ENOENT) 293 ret = 0; 294 else 295 goto fail; 296 } 297 298 ddc_phandle = of_parse_phandle(connector_node, "ddc-i2c-bus", 0); 299 if (!ddc_phandle) 300 goto fail; 301 302 dvi->ddc = of_get_i2c_adapter_by_node(ddc_phandle); 303 if (dvi->ddc) 304 dev_info(dvi->dev, "Connector's ddc i2c bus found\n"); 305 else 306 ret = -EPROBE_DEFER; 307 308 of_node_put(ddc_phandle); 309 310 fail: 311 of_node_put(connector_node); 312 return ret; 313 } 314 --- 0-DAY kernel test infrastructure Open Source Technology Center https://lists.01.org/pipermail/kbuild-all Intel Corporation