Hi Markus, Thank you for the patch! Yet something to improve: [auto build test ERROR on robh/for-next] [also build test ERROR on pza/reset/next linus/master v5.15 next-20211106] [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/Markus-Schneider-Pargmann/drm-mediatek-Add-mt8195-DisplayPort-driver/20211021-172815 base: https://git.kernel.org/pub/scm/linux/kernel/git/robh/linux.git for-next config: arm64-randconfig-r013-20211028 (attached as .config) compiler: clang version 14.0.0 (https://github.com/llvm/llvm-project 5db7568a6a1fcb408eb8988abdaff2a225a8eb72) 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/cacf71bb7517b3ea11577d354daf7024551aa948 git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Markus-Schneider-Pargmann/drm-mediatek-Add-mt8195-DisplayPort-driver/20211021-172815 git checkout cacf71bb7517b3ea11577d354daf7024551aa948 # save the attached .config to linux build tree mkdir build_dir COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=arm64 SHELL=/bin/bash If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp@xxxxxxxxx> All errors (new ones prefixed by >>): >> ld.lld: error: undefined symbol: mtk_dp_driver >>> referenced by mtk_drm_drv.c >>> gpu/drm/mediatek/mtk_drm_drv.o:(mtk_drm_drivers) in archive drivers/built-in.a >>> did you mean: mtk_dpi_driver >>> defined in: drivers/built-in.a(gpu/drm/mediatek/mtk_dpi.o) --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@xxxxxxxxxxxx
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