Hi Bo-Chen, Thank you for the patch! Perhaps something to improve: [auto build test WARNING on drm-misc/drm-misc-next] [also build test WARNING on drm/drm-next pza/reset/next linus/master v5.19-rc6 next-20220715] [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#_base_tree_information] url: https://github.com/intel-lab-lkp/linux/commits/Bo-Chen-Chen/drm-mediatek-Add-MT8195-DisplayPort-driver/20220712-191341 base: git://anongit.freedesktop.org/drm/drm-misc drm-misc-next config: arm-allyesconfig (https://download.01.org/0day-ci/archive/20220716/202207160102.zyueiI7S-lkp@xxxxxxxxx/config) compiler: arm-linux-gnueabi-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/a3869f524e16c38015e0f124c6597927fc6d26b0 git remote add linux-review https://github.com/intel-lab-lkp/linux git fetch --no-tags linux-review Bo-Chen-Chen/drm-mediatek-Add-MT8195-DisplayPort-driver/20220712-191341 git checkout a3869f524e16c38015e0f124c6597927fc6d26b0 # 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=arm SHELL=/bin/bash drivers/gpu/drm/mediatek/ drivers/pci/controller/dwc/ 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/mediatek/mtk_dp.c: In function 'mtk_dp_train_tps_1': >> drivers/gpu/drm/mediatek/mtk_dp.c:1092:12: warning: variable 'val' set but not used [-Wunused-but-set-variable] 1092 | u8 val; | ^~~ drivers/gpu/drm/mediatek/mtk_dp.c: In function 'mtk_dp_bridge_atomic_get_output_bus_fmts': drivers/gpu/drm/mediatek/mtk_dp.c:1865:26: error: 'MEDIA_BUS_FMT_FIXED' undeclared (first use in this function) 1865 | output_fmts[0] = MEDIA_BUS_FMT_FIXED; | ^~~~~~~~~~~~~~~~~~~ drivers/gpu/drm/mediatek/mtk_dp.c:1865:26: note: each undeclared identifier is reported only once for each function it appears in drivers/gpu/drm/mediatek/mtk_dp.c: At top level: drivers/gpu/drm/mediatek/mtk_dp.c:1870:9: error: 'MEDIA_BUS_FMT_RGB888_1X24' undeclared here (not in a function) 1870 | MEDIA_BUS_FMT_RGB888_1X24, | ^~~~~~~~~~~~~~~~~~~~~~~~~ drivers/gpu/drm/mediatek/mtk_dp.c:1871:9: error: 'MEDIA_BUS_FMT_YUV8_1X24' undeclared here (not in a function) 1871 | MEDIA_BUS_FMT_YUV8_1X24, | ^~~~~~~~~~~~~~~~~~~~~~~ drivers/gpu/drm/mediatek/mtk_dp.c:1872:9: error: 'MEDIA_BUS_FMT_YUYV8_1X16' undeclared here (not in a function) 1872 | MEDIA_BUS_FMT_YUYV8_1X16, | ^~~~~~~~~~~~~~~~~~~~~~~~ vim +/val +1092 drivers/gpu/drm/mediatek/mtk_dp.c 1087 1088 static int mtk_dp_train_tps_1(struct mtk_dp *mtk_dp, u8 target_lane_count, 1089 int *iteration_count, u8 *lane_adjust, 1090 int *status_control, u8 *prev_lane_adjust) 1091 { > 1092 u8 val; 1093 u8 link_status[DP_LINK_STATUS_SIZE] = {}; 1094 1095 mtk_dp_training_set_scramble(mtk_dp, false); 1096 1097 if (*status_control == 0) { 1098 mtk_dp_train_set_pattern(mtk_dp, 1); 1099 val = DP_LINK_SCRAMBLING_DISABLE | 1100 DP_TRAINING_PATTERN_1; 1101 drm_dp_dpcd_writeb(&mtk_dp->aux, 1102 DP_TRAINING_PATTERN_SET, 1103 DP_LINK_SCRAMBLING_DISABLE | 1104 DP_TRAINING_PATTERN_1); 1105 drm_dp_dpcd_read(&mtk_dp->aux, 1106 DP_ADJUST_REQUEST_LANE0_1, 1107 lane_adjust, 1108 sizeof(*lane_adjust) * 2); 1109 1110 mtk_dp_train_update_swing_pre(mtk_dp, 1111 target_lane_count, lane_adjust); 1112 *status_control = 1; 1113 (*iteration_count)++; 1114 } 1115 1116 drm_dp_link_train_clock_recovery_delay(&mtk_dp->aux, mtk_dp->rx_cap); 1117 drm_dp_dpcd_read_link_status(&mtk_dp->aux, link_status); 1118 1119 if (drm_dp_clock_recovery_ok(link_status, 1120 target_lane_count)) { 1121 mtk_dp->train_info.cr_done = true; 1122 *iteration_count = 1; 1123 dev_dbg(mtk_dp->dev, "Link train CR pass\n"); 1124 return 0; 1125 } else if (*prev_lane_adjust == link_status[4]) { 1126 (*iteration_count)++; 1127 if (*prev_lane_adjust & DP_ADJUST_VOLTAGE_SWING_LANE0_MASK) { 1128 dev_dbg(mtk_dp->dev, "Link train CQ fail\n"); 1129 return -EINVAL; 1130 } 1131 } else { 1132 *prev_lane_adjust = link_status[4]; 1133 } 1134 return -EAGAIN; 1135 } 1136 -- 0-DAY CI Kernel Test Service https://01.org/lkp
