tree: https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master head: 4b74e088fef6ce8cc513f935ce236c38bdf5f67b commit: c34f1652a18c4bd4d0bb9e7c7d946861c3ed73c9 [2923/3376] drm/amd/display: fixed an error related to 4:2:0/4:2:2 DSC config: i386-randconfig-a014-20211122 (https://download.01.org/0day-ci/archive/20211124/202111241842.pSYgc67V-lk...) 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 c34f1652a18c4bd4d0bb9e7c7d946861c3ed73c9 # save the config file to linux build tree mkdir build_dir make W=1 O=build_dir ARCH=i386 SHELL=/bin/bash If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All errors (new ones prefixed by >>): ld: drivers/gpu/drm/amd/display/dc/dsc/rc_calc_dpi.o: in function `dscc_compute_dsc_parameters': vim +116 drivers/gpu/drm/amd/amdgpu/../display/dc/dsc/rc_calc_dpi.c 97 98 int dscc_compute_dsc_parameters(const struct drm_dsc_config *pps, struct dsc_parameters *dsc_params) 99 { 100 int ret; 101 struct rc_params rc; 102 struct drm_dsc_config dsc_cfg; 103 104 calc_rc_params(&rc, pps); 105 dsc_params->pps = *pps; 106 dsc_params->pps.initial_scale_value = 8 * rc.rc_model_size / (rc.rc_model_size - rc.initial_fullness_offset); 107 108 copy_pps_fields(&dsc_cfg, &dsc_params->pps); 109 copy_rc_to_cfg(&dsc_cfg, &rc); 110 111 dsc_cfg.mux_word_size = dsc_params->pps.bits_per_component <= 10 ? 48 : 64; 112 113 ret = drm_dsc_compute_rc_parameters(&dsc_cfg); 114 dsc_params->bytes_per_pixel = 115 (uint32_t)(((unsigned long long)dsc_cfg.slice_chunk_size * 0x10000000 + (dsc_cfg.slice_width - 1)) 117 118 copy_pps_fields(&dsc_params->pps, &dsc_cfg); 119 dsc_params->rc_buffer_model_size = dsc_cfg.rc_bits; 120 return ret; 121 } 122 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org