tree: https://github.com/superna9999/linux amlogic/v5.18/g12-dsi-wip head: fbcc0a7f53880919dc415da44339313dd59768f0 commit: 69065af6f6c3f3c1a6a29ab765c02e8371be3a42 [13/14] drm/meson: add DSI encoder config: arm64-allmodconfig (https://download.01.org/0day-ci/archive/20220122/202201220231.SSLn9QGA-lk...) compiler: clang version 14.0.0 (https://github.com/llvm/llvm-project 7b3d30728816403d1fd73cc5082e9fb761262bce) 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 # install arm64 cross compiling tool for clang build # apt-get install binutils-aarch64-linux-gnu # https://github.com/superna9999/linux/commit/69065af6f6c3f3c1a6a29ab765c02... git remote add superna9999 https://github.com/superna9999/linux git fetch --no-tags superna9999 amlogic/v5.18/g12-dsi-wip git checkout 69065af6f6c3f3c1a6a29ab765c02e8371be3a42 # save the config file to linux build tree mkdir build_dir COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=arm64 SHELL=/bin/bash drivers/gpu/drm/meson/ 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 >>): dev_dbg(priv->dev, "Failed to find DSI transceiver bridge: %d\n", ret); ^~~ include/linux/dev_printk.h:155:39: note: expanded from macro 'dev_dbg' dynamic_dev_dbg(dev, dev_fmt(fmt), ##__VA_ARGS__) ^~~~~~~~~~~ include/linux/dynamic_debug.h:167:19: note: expanded from macro 'dynamic_dev_dbg' dev, fmt, ##__VA_ARGS__) ^~~~~~~~~~~ include/linux/dynamic_debug.h:152:56: note: expanded from macro '_dynamic_func_call' __dynamic_func_call(__UNIQUE_ID(ddebug), fmt, func, ##__VA_ARGS__) ^~~~~~~~~~~ include/linux/dynamic_debug.h:134:15: note: expanded from macro '__dynamic_func_call' func(&id, ##__VA_ARGS__); \ ^~~~~~~~~~~ drivers/gpu/drm/meson/meson_encoder_dsi.c:107:9: note: initialize the variable 'ret' to silence this warning int ret; ^ = 0 1 warning generated. vim +/ret +122 drivers/gpu/drm/meson/meson_encoder_dsi.c 102 103 int meson_encoder_dsi_init(struct meson_drm *priv) 104 { 105 struct meson_encoder_dsi *meson_encoder_dsi; 106 struct device_node *remote; 107 int ret; 108 109 meson_encoder_dsi = devm_kzalloc(priv->dev, sizeof(*meson_encoder_dsi), GFP_KERNEL); 110 if (!meson_encoder_dsi) 111 return -ENOMEM; 112 113 /* DSI Transceiver Bridge */ 114 remote = of_graph_get_remote_node(priv->dev->of_node, 2, 0); 115 if (!remote) { 116 dev_err(priv->dev, "DSI transceiver device is disabled"); 117 return 0; 118 } 119 120 meson_encoder_dsi->next_bridge = of_drm_find_bridge(remote); 121 if (!meson_encoder_dsi->next_bridge) { --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org