Hi Sam, I love your patch! Yet something to improve: [auto build test ERROR on backlight/for-backlight-next] [also build test ERROR on next-20200731] [cannot apply to drm-intel/for-linux-next drm-exynos/exynos-drm-next tegra-drm/drm/tegra/for-next drm-tip/drm-tip linus/master drm/drm-next v5.8-rc7] [If your patch is applied to the wrong git tree, kindly drop us a note. And when submitting patch, we suggest to use '--base' as documented in https://git-scm.com/docs/git-format-patch] url: https://github.com/0day-ci/linux/commits/Sam-Ravnborg/backlight-add-init-macros-and-accessors/20200802-190940 base: for-backlight-next config: arm-randconfig-r016-20200802 (attached as .config) compiler: arm-linux-gnueabi-gcc (GCC) 9.3.0 reproduce (this is a W=1 build): 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 COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=arm If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot All errors (new ones prefixed by >>): drivers/gpu/drm/tilcdc/tilcdc_panel.c: In function 'panel_encoder_dpms': >> drivers/gpu/drm/tilcdc/tilcdc_panel.c:50:6: error: 'pmode' undeclared (first use in this function); did you mean 'mode'? 50 | if (pmode == DRM_MODE_DPMS_O) | ^~~~~ | mode drivers/gpu/drm/tilcdc/tilcdc_panel.c:50:6: note: each undeclared identifier is reported only once for each function it appears in >> drivers/gpu/drm/tilcdc/tilcdc_panel.c:50:15: error: 'DRM_MODE_DPMS_O' undeclared (first use in this function); did you mean 'DRM_MODE_DPMS_ON'? 50 | if (pmode == DRM_MODE_DPMS_O) | ^~~~~~~~~~~~~~~ | DRM_MODE_DPMS_ON vim +50 drivers/gpu/drm/tilcdc/tilcdc_panel.c 43 44 static void panel_encoder_dpms(struct drm_encoder *encoder, int mode) 45 { 46 struct panel_encoder *panel_encoder = to_panel_encoder(encoder); 47 struct backlight_device *backlight = panel_encoder->mod->backlight; 48 struct gpio_desc *gpio = panel_encoder->mod->enable_gpio; 49 > 50 if (pmode == DRM_MODE_DPMS_O) 51 backlight_set_power_on(backlight); 52 else 53 backlight_set_power_off(backlight); 54 55 backlight_update_status(backlight); 56 57 if (gpio) 58 gpiod_set_value_cansleep(gpio, 59 mode == DRM_MODE_DPMS_ON ? 1 : 0); 60 } 61 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org