Hi Imre, kernel test robot noticed the following build warnings: [auto build test WARNING on drm-tip/drm-tip] url: https://github.com/intel-lab-lkp/linux/commits/Imre-Deak/drm-dp_mst-Fix-fractional-DSC-bpp-handling/20231024-091920 base: git://anongit.freedesktop.org/drm/drm-tip drm-tip patch link: https://lore.kernel.org/r/20231024010925.3949910-9-imre.deak%40intel.com patch subject: [PATCH 08/29] drm/dp: Add helpers to calculate the link BW overhead config: m68k-allyesconfig (https://download.01.org/0day-ci/archive/20231024/202310241055.Pz9vy06V-lkp@xxxxxxxxx/config) compiler: m68k-linux-gcc (GCC) 13.2.0 reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20231024/202310241055.Pz9vy06V-lkp@xxxxxxxxx/reproduce) If you fix the issue in a separate patch/commit (i.e. not just a new version of the same patch/commit), kindly add following tags | Reported-by: kernel test robot <lkp@xxxxxxxxx> | Closes: https://lore.kernel.org/oe-kbuild-all/202310241055.Pz9vy06V-lkp@xxxxxxxxx/ All warnings (new ones prefixed by >>): >> drivers/gpu/drm/display/drm_dp_helper.c:4002: warning: Function parameter or member 'is_uhbr' not described in 'drm_dp_bw_channel_coding_efficiency' >> drivers/gpu/drm/display/drm_dp_helper.c:4002: warning: expecting prototype for Returns the efficiency in the 100%/coding(). Prototype was for drm_dp_bw_channel_coding_efficiency() instead vim +4002 drivers/gpu/drm/display/drm_dp_helper.c 3996 3997 /** 3998 * Returns the efficiency in the 100%/coding-overhead% ratio in 3999 * 1ppm units. 4000 */ 4001 int drm_dp_bw_channel_coding_efficiency(bool is_uhbr) > 4002 { 4003 if (is_uhbr) 4004 return 967100; 4005 else 4006 /* 4007 * Note that on 8b/10b MST the efficiency is only 4008 * 78.75% due to the 1 out of 64 MTPH packet overhead, 4009 * not accounted for here. 4010 */ 4011 return 800000; 4012 } 4013 EXPORT_SYMBOL(drm_dp_bw_channel_coding_efficiency); 4014 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki
