Hi Kuogee, Thank you for the patch! Perhaps something to improve: [auto build test WARNING on drm/drm-next] [also build test WARNING on drm-intel/for-linux-next drm-tip/drm-tip drm-exynos/exynos-drm-next tegra-drm/drm/tegra/for-next v5.17-rc4 next-20220215] [cannot apply to airlied/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/Kuogee-Hsieh/drm-msm-dp-enable-w... base: git://anongit.freedesktop.org/drm/drm drm-next config: nds32-randconfig-r001-20220216 (https://download.01.org/0day-ci/archive/20220216/202202161305.kkDRPK62-lk...) compiler: nds32le-linux-gcc (GCC) 11.2.0 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 # https://github.com/0day-ci/linux/commit/294e6c4f98a10e815d8673f550f4470b0... git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Kuogee-Hsieh/drm-msm-dp-enable-widebus-feature-base-on-chip-hardware-revision/20220216-052636 git checkout 294e6c4f98a10e815d8673f550f4470b0b71e34d # save the config file to linux build tree mkdir build_dir COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross O=build_dir ARCH=nds32 SHELL=/bin/bash drivers/gpu/ If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All warnings (new ones prefixed by >>): In file included from drivers/gpu/drm/msm/msm_gpu.h:16, from drivers/gpu/drm/msm/adreno/adreno_gpu.h:15, from drivers/gpu/drm/msm/adreno/adreno_device.c:9: 453 | bool msm_dp_wide_bus_enable(struct msm_dp *dp_display) | ^~~~~~~~~~~~~~~~~~~~~~ -- In file included from drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c:17: 453 | bool msm_dp_wide_bus_enable(struct msm_dp *dp_display) | ^~~~~~~~~~~~~~~~~~~~~~ drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c: In function 'dpu_encoder_virt_enable': drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c:1155:33: warning: variable 'priv' set but not used [-Wunused-but-set-variable] 1155 | struct msm_drm_private *priv; | ^~~~ drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c: In function 'dpu_encoder_virt_disable': drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c:1192:33: warning: variable 'priv' set but not used [-Wunused-but-set-variable] 1192 | struct msm_drm_private *priv; | ^~~~ -- In file included from drivers/gpu/drm/msm/msm_fence.c:9: 453 | bool msm_dp_wide_bus_enable(struct msm_dp *dp_display) | ^~~~~~~~~~~~~~~~~~~~~~ drivers/gpu/drm/msm/msm_fence.c: In function 'msm_fence_context_alloc': drivers/gpu/drm/msm/msm_fence.c:24:9: warning: 'strncpy' specified bound 32 equals destination size [-Wstringop-truncation] 24 | strncpy(fctx->name, name, sizeof(fctx->name)); | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ vim +/msm_dp_wide_bus_enable +453 drivers/gpu/drm/msm/msm_drv.h 452 454 { 455 return false; 456 } 457 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org