Hi Maxime, I love your patch! Perhaps something to improve: [auto build test WARNING on 37b355fdaf31ee18bda9a93c2a438dc1cbf57ec9] url: https://github.com/intel-lab-lkp/linux/commits/Maxime-Ripard/drm-Analog-TV-Improvements/20220730-004859 base: 37b355fdaf31ee18bda9a93c2a438dc1cbf57ec9 config: powerpc-allmodconfig (https://download.01.org/0day-ci/archive/20220730/202207301024.h3rifgQO-lkp@xxxxxxxxx/config) compiler: powerpc-linux-gcc (GCC) 12.1.0 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/intel-lab-lkp/linux/commit/2f380bf85052b89ae0ffc6cfdf2dc91cdcde5a75 git remote add linux-review https://github.com/intel-lab-lkp/linux git fetch --no-tags linux-review Maxime-Ripard/drm-Analog-TV-Improvements/20220730-004859 git checkout 2f380bf85052b89ae0ffc6cfdf2dc91cdcde5a75 # save the config file mkdir build_dir && cp config build_dir/.config COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.1.0 make.cross W=1 O=build_dir ARCH=powerpc SHELL=/bin/bash drivers/gpu/drm/vc4/ If you fix the issue, kindly add following tag where applicable Reported-by: kernel test robot <lkp@xxxxxxxxx> All warnings (new ones prefixed by >>): >> drivers/gpu/drm/vc4/vc4_vec.c:257:6: warning: no previous prototype for 'vc4_vec_connector_reset' [-Wmissing-prototypes] 257 | void vc4_vec_connector_reset(struct drm_connector *connector) | ^~~~~~~~~~~~~~~~~~~~~~~ vim +/vc4_vec_connector_reset +257 drivers/gpu/drm/vc4/vc4_vec.c 256 > 257 void vc4_vec_connector_reset(struct drm_connector *connector) 258 { 259 drm_atomic_helper_connector_reset(connector); 260 drm_atomic_helper_connector_tv_reset(connector); 261 } 262 -- 0-DAY CI Kernel Test Service https://01.org/lkp