Hi Javier, I love your patch! Yet something to improve: [auto build test ERROR on drm/drm-next] [also build test ERROR on shawnguo/for-next linus/master linux/master v5.18-rc5 next-20220502] [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/intel-lab-lkp/linux/commits/Javier-Martinez-Canillas/drm-Allow-simpledrm-to-setup-its-emulated-FB-as-firmware-provided/20220502-234145 base: git://anongit.freedesktop.org/drm/drm drm-next config: hexagon-randconfig-r045-20220501 (https://download.01.org/0day-ci/archive/20220503/202205030522.Y2Nq4tz7-lkp@xxxxxxxxx/config) compiler: clang version 15.0.0 (https://github.com/llvm/llvm-project 09325d36061e42b495d1f4c7e933e260eac260ed) 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 # https://github.com/intel-lab-lkp/linux/commit/28ef46724e385165777a21d9f661188fa2577a1e git remote add linux-review https://github.com/intel-lab-lkp/linux git fetch --no-tags linux-review Javier-Martinez-Canillas/drm-Allow-simpledrm-to-setup-its-emulated-FB-as-firmware-provided/20220502-234145 git checkout 28ef46724e385165777a21d9f661188fa2577a1e # save the config file mkdir build_dir && cp config build_dir/.config COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=hexagon SHELL=/bin/bash drivers/gpu/drm/tiny/ 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/tiny/simpledrm.c:904:31: error: call to undeclared function 'DRM_FB_SET_OPTION'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration] drm_fbdev_generic_setup(dev, DRM_FB_SET_OPTION(DRM_FB_FW, 1)); ^ >> drivers/gpu/drm/tiny/simpledrm.c:904:49: error: use of undeclared identifier 'DRM_FB_FW' drm_fbdev_generic_setup(dev, DRM_FB_SET_OPTION(DRM_FB_FW, 1)); ^ 2 errors generated. vim +/DRM_FB_SET_OPTION +904 drivers/gpu/drm/tiny/simpledrm.c 884 885 /* 886 * Platform driver 887 */ 888 889 static int simpledrm_probe(struct platform_device *pdev) 890 { 891 struct simpledrm_device *sdev; 892 struct drm_device *dev; 893 int ret; 894 895 sdev = simpledrm_device_create(&simpledrm_driver, pdev); 896 if (IS_ERR(sdev)) 897 return PTR_ERR(sdev); 898 dev = &sdev->dev; 899 900 ret = drm_dev_register(dev, 0); 901 if (ret) 902 return ret; 903 > 904 drm_fbdev_generic_setup(dev, DRM_FB_SET_OPTION(DRM_FB_FW, 1)); 905 906 return 0; 907 } 908 -- 0-DAY CI Kernel Test Service https://01.org/lkp