tree: git://linuxtv.org/pinchartl/media.git drm/du/next head: c43bcd64c7c703ff7196f74cb6bfc67e35b562d9 commit: e94bb2bf88e2e410a5ae9a0fdd161134e6ac59a0 [14/17] drm/bridge: lvds-codec: Add "lvds-decoder" support config: x86_64-randconfig-r005-20201111 (attached as .config) compiler: clang version 12.0.0 (https://github.com/llvm/llvm-project 874b0a0b9db93f5d3350ffe6b5efda2d908415d0) 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 x86_64 cross compiling tool for clang build # apt-get install binutils-x86-64-linux-gnu git remote add pinchartl-media git://linuxtv.org/pinchartl/media.git git fetch --no-tags pinchartl-media drm/du/next git checkout e94bb2bf88e2e410a5ae9a0fdd161134e6ac59a0 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=x86_64 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 >>): lvds_codec->connector_type = (u32)of_device_get_match_data(&pdev->dev); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 1 warning generated. vim +70 drivers/gpu/drm/bridge/lvds-codec.c 56 57 static int lvds_codec_probe(struct platform_device *pdev) 58 { 59 struct device *dev = &pdev->dev; 60 struct device_node *port; 61 struct device_node *endpoint; 62 struct device_node *panel_node; 63 struct drm_panel *panel; 64 struct lvds_codec *lvds_codec; 65 66 lvds_codec = devm_kzalloc(dev, sizeof(*lvds_codec), GFP_KERNEL); 67 if (!lvds_codec) 68 return -ENOMEM; 69 71 lvds_codec->powerdown_gpio = devm_gpiod_get_optional(dev, "powerdown", 72 GPIOD_OUT_HIGH); 73 if (IS_ERR(lvds_codec->powerdown_gpio)) { 74 int err = PTR_ERR(lvds_codec->powerdown_gpio); 75 76 if (err != -EPROBE_DEFER) 77 dev_err(dev, "powerdown GPIO failure: %d\n", err); 78 return err; 79 } 80 81 /* Locate the panel DT node. */ 82 port = of_graph_get_port_by_id(dev->of_node, 1); 83 if (!port) { 84 dev_dbg(dev, "port 1 not found\n"); 85 return -ENXIO; 86 } 87 88 endpoint = of_get_child_by_name(port, "endpoint"); 89 of_node_put(port); 90 if (!endpoint) { 91 dev_dbg(dev, "no endpoint for port 1\n"); 92 return -ENXIO; 93 } 94 95 panel_node = of_graph_get_remote_port_parent(endpoint); 96 of_node_put(endpoint); 97 if (!panel_node) { 98 dev_dbg(dev, "no remote endpoint for port 1\n"); 99 return -ENXIO; 100 } 101 102 panel = of_drm_find_panel(panel_node); 103 of_node_put(panel_node); 104 if (IS_ERR(panel)) { 105 dev_dbg(dev, "panel not found, deferring probe\n"); 106 return PTR_ERR(panel); 107 } 108 109 lvds_codec->panel_bridge = 110 devm_drm_panel_bridge_add_typed(dev, panel, 111 lvds_codec->connector_type); 112 if (IS_ERR(lvds_codec->panel_bridge)) 113 return PTR_ERR(lvds_codec->panel_bridge); 114 115 /* 116 * The panel_bridge bridge is attached to the panel's of_node, 117 * but we need a bridge attached to our of_node for our user 118 * to look up. 119 */ 120 lvds_codec->bridge.of_node = dev->of_node; 121 lvds_codec->bridge.funcs = &funcs; 122 drm_bridge_add(&lvds_codec->bridge); 123 124 platform_set_drvdata(pdev, lvds_codec); 125 126 return 0; 127 } 128 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org