Hi Rajeev, Thank you for the patch! Yet something to improve: [auto build test ERROR on drm-intel/for-linux-next] [also build test ERROR on drm-tip/drm-tip drm-exynos/exynos-drm-next tegra-drm/drm/tegra/for-next linus/master v5.13-rc3 next-20210528] [cannot apply to drm/drm-next] [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/Rajeev-Nandan/drm-Support-basic-DPCD-backlight-in-panel-simple-and-add-a-new-panel-ATNA33XC20/20210530-235810 base: git://anongit.freedesktop.org/drm-intel for-linux-next config: arm64-randconfig-r005-20210530 (attached as .config) compiler: clang version 13.0.0 (https://github.com/llvm/llvm-project bc6799f2f79f0ae87e9f1ebf9d25ba799fbd25a9) 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 # install arm64 cross compiling tool for clang build # apt-get install binutils-aarch64-linux-gnu # https://github.com/0day-ci/linux/commit/1cf1b3f6b1f766d4e932422d1cdec19354acdcc3 git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Rajeev-Nandan/drm-Support-basic-DPCD-backlight-in-panel-simple-and-add-a-new-panel-ATNA33XC20/20210530-235810 git checkout 1cf1b3f6b1f766d4e932422d1cdec19354acdcc3 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=arm64 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp@xxxxxxxxx> All errors (new ones prefixed by >>): >> drivers/gpu/drm/drm_panel.c:39:32: error: field has incomplete type 'struct drm_edp_backlight_info' struct drm_edp_backlight_info info; ^ drivers/gpu/drm/drm_panel.c:39:9: note: forward declaration of 'struct drm_edp_backlight_info' struct drm_edp_backlight_info info; ^ >> drivers/gpu/drm/drm_panel.c:362:4: error: implicit declaration of function 'drm_edp_backlight_enable' [-Werror,-Wimplicit-function-declaration] drm_edp_backlight_enable(bl->aux, &bl->info, brightness); ^ drivers/gpu/drm/drm_panel.c:362:4: note: did you mean 'backlight_enable'? include/linux/backlight.h:363:19: note: 'backlight_enable' declared here static inline int backlight_enable(struct backlight_device *bd) ^ >> drivers/gpu/drm/drm_panel.c:366:9: error: implicit declaration of function 'drm_edp_backlight_set_level' [-Werror,-Wimplicit-function-declaration] ret = drm_edp_backlight_set_level(bl->aux, &bl->info, brightness); ^ >> drivers/gpu/drm/drm_panel.c:369:4: error: implicit declaration of function 'drm_edp_backlight_disable' [-Werror,-Wimplicit-function-declaration] drm_edp_backlight_disable(bl->aux, &bl->info); ^ drivers/gpu/drm/drm_panel.c:369:4: note: did you mean 'backlight_disable'? include/linux/backlight.h:379:19: note: 'backlight_disable' declared here static inline int backlight_disable(struct backlight_device *bd) ^ >> drivers/gpu/drm/drm_panel.c:428:7: error: implicit declaration of function 'drm_edp_backlight_supported' [-Werror,-Wimplicit-function-declaration] if (!drm_edp_backlight_supported(edp_dpcd)) { ^ >> drivers/gpu/drm/drm_panel.c:433:8: error: implicit declaration of function 'drm_edp_backlight_init' [-Werror,-Wimplicit-function-declaration] ret = drm_edp_backlight_init(aux, &bl->info, 0, edp_dpcd, ^ 6 errors generated. vim +39 drivers/gpu/drm/drm_panel.c 35 36 struct dp_aux_backlight { 37 struct backlight_device *base; 38 struct drm_dp_aux *aux; > 39 struct drm_edp_backlight_info info; 40 bool enabled; 41 }; 42 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@xxxxxxxxxxxx
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