tree: https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master head: 18250b538735142307082e4e99e3ae5c12d44013 commit: 9df857f930d6035996d481b4e5bc9ce082990afb [10837/13394] drm/amd/display: Move vupdate keepout programming from DCN20 to DCN10 config: i386-randconfig-r026-20210417 (attached as .config) compiler: gcc-9 (Debian 9.3.0-22) 9.3.0 reproduce (this is a W=1 build): # https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/commi... git remote add linux-next https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git git fetch --no-tags linux-next master git checkout 9df857f930d6035996d481b4e5bc9ce082990afb # save the attached .config to linux build tree make W=1 W=1 ARCH=i386 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 >>): 139 | void optc1_set_vupdate_keepout(struct timing_generator *optc, | ^~~~~~~~~~~~~~~~~~~~~~~~~ drivers/gpu/drm/amd/amdgpu/../display/dc/dcn10/dcn10_optc.c:879:6: warning: no previous prototype for 'optc1_setup_manual_trigger' [-Wmissing-prototypes] 879 | void optc1_setup_manual_trigger(struct timing_generator *optc) | ^~~~~~~~~~~~~~~~~~~~~~~~~~ drivers/gpu/drm/amd/amdgpu/../display/dc/dcn10/dcn10_optc.c:897:6: warning: no previous prototype for 'optc1_program_manual_trigger' [-Wmissing-prototypes] 897 | void optc1_program_manual_trigger(struct timing_generator *optc) | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~ vim +/optc1_set_vupdate_keepout +139 drivers/gpu/drm/amd/amdgpu/../display/dc/dcn10/dcn10_optc.c 133 134 /** 135 * Vupdate keepout can be set to a window to block the update lock for that pipe from changing. 136 * Start offset begins with vstartup and goes for x number of clocks, 137 * end offset starts from end of vupdate to x number of clocks. 138 */ 140 struct vupdate_keepout_params *params) 141 { 142 struct optc *optc1 = DCN10TG_FROM_TG(optc); 143 144 REG_SET_3(OTG_VUPDATE_KEEPOUT, 0, 145 MASTER_UPDATE_LOCK_VUPDATE_KEEPOUT_START_OFFSET, params->start_offset, 146 MASTER_UPDATE_LOCK_VUPDATE_KEEPOUT_END_OFFSET, params->end_offset, 147 OTG_MASTER_UPDATE_LOCK_VUPDATE_KEEPOUT_EN, params->enable); 148 } 149 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org