Hi Robin, First bad commit (maybe != root cause):
tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master head: bbf5c979011a099af5dc76498918ed7df445635b commit: b4ceb4a5359ed1c9ba4a20acf3a70d4bbead3248 iommu: Tidy up Kconfig for SoC IOMMUs date: 3 months ago config: nds32-randconfig-r006-20201012 (attached as .config) compiler: nds32le-linux-gcc (GCC) 9.3.0 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://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=b4ceb4a5359ed1c9ba4a20acf3a70d4bbead3248 git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git git fetch --no-tags linus master git checkout b4ceb4a5359ed1c9ba4a20acf3a70d4bbead3248 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=nds32 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <l...@intel.com> All warnings (new ones prefixed by >>): >> drivers/gpu/drm/rockchip/rockchip_rgb.c:71:22: warning: no previous >> prototype for 'rockchip_rgb_init' [-Wmissing-prototypes] 71 | struct rockchip_rgb *rockchip_rgb_init(struct device *dev, | ^~~~~~~~~~~~~~~~~ >> drivers/gpu/drm/rockchip/rockchip_rgb.c:159:6: warning: no previous >> prototype for 'rockchip_rgb_fini' [-Wmissing-prototypes] 159 | void rockchip_rgb_fini(struct rockchip_rgb *rgb) | ^~~~~~~~~~~~~~~~~ vim +/rockchip_rgb_init +71 drivers/gpu/drm/rockchip/rockchip_rgb.c 1f0f0151517278 Sandy Huang 2018-08-30 70 1f0f0151517278 Sandy Huang 2018-08-30 @71 struct rockchip_rgb *rockchip_rgb_init(struct device *dev, 1f0f0151517278 Sandy Huang 2018-08-30 72 struct drm_crtc *crtc, 1f0f0151517278 Sandy Huang 2018-08-30 73 struct drm_device *drm_dev) 1f0f0151517278 Sandy Huang 2018-08-30 74 { 1f0f0151517278 Sandy Huang 2018-08-30 75 struct rockchip_rgb *rgb; 1f0f0151517278 Sandy Huang 2018-08-30 76 struct drm_encoder *encoder; 1f0f0151517278 Sandy Huang 2018-08-30 77 struct device_node *port, *endpoint; 1f0f0151517278 Sandy Huang 2018-08-30 78 u32 endpoint_id; 1f0f0151517278 Sandy Huang 2018-08-30 79 int ret = 0, child_count = 0; 1f0f0151517278 Sandy Huang 2018-08-30 80 struct drm_panel *panel; 1f0f0151517278 Sandy Huang 2018-08-30 81 struct drm_bridge *bridge; 1f0f0151517278 Sandy Huang 2018-08-30 82 1f0f0151517278 Sandy Huang 2018-08-30 83 rgb = devm_kzalloc(dev, sizeof(*rgb), GFP_KERNEL); 1f0f0151517278 Sandy Huang 2018-08-30 84 if (!rgb) 1f0f0151517278 Sandy Huang 2018-08-30 85 return ERR_PTR(-ENOMEM); 1f0f0151517278 Sandy Huang 2018-08-30 86 1f0f0151517278 Sandy Huang 2018-08-30 87 rgb->dev = dev; 1f0f0151517278 Sandy Huang 2018-08-30 88 rgb->drm_dev = drm_dev; 1f0f0151517278 Sandy Huang 2018-08-30 89 1f0f0151517278 Sandy Huang 2018-08-30 90 port = of_graph_get_port_by_id(dev->of_node, 0); 1f0f0151517278 Sandy Huang 2018-08-30 91 if (!port) 1f0f0151517278 Sandy Huang 2018-08-30 92 return ERR_PTR(-EINVAL); 1f0f0151517278 Sandy Huang 2018-08-30 93 1f0f0151517278 Sandy Huang 2018-08-30 94 for_each_child_of_node(port, endpoint) { 1f0f0151517278 Sandy Huang 2018-08-30 95 if (of_property_read_u32(endpoint, "reg", &endpoint_id)) 1f0f0151517278 Sandy Huang 2018-08-30 96 endpoint_id = 0; 1f0f0151517278 Sandy Huang 2018-08-30 97 7cd7943dc55e0f Heiko Stuebner 2020-01-21 98 /* if subdriver (> 0) or error case (< 0), ignore entry */ 7cd7943dc55e0f Heiko Stuebner 2020-01-21 99 if (rockchip_drm_endpoint_is_subdriver(endpoint) != 0) 1f0f0151517278 Sandy Huang 2018-08-30 100 continue; 1f0f0151517278 Sandy Huang 2018-08-30 101 1f0f0151517278 Sandy Huang 2018-08-30 102 child_count++; 1f0f0151517278 Sandy Huang 2018-08-30 103 ret = drm_of_find_panel_or_bridge(dev->of_node, 0, endpoint_id, 1f0f0151517278 Sandy Huang 2018-08-30 104 &panel, &bridge); a17ce9960b3628 Julia Lawall 2019-01-13 105 if (!ret) { a17ce9960b3628 Julia Lawall 2019-01-13 106 of_node_put(endpoint); 1f0f0151517278 Sandy Huang 2018-08-30 107 break; 1f0f0151517278 Sandy Huang 2018-08-30 108 } a17ce9960b3628 Julia Lawall 2019-01-13 109 } 1f0f0151517278 Sandy Huang 2018-08-30 110 1f0f0151517278 Sandy Huang 2018-08-30 111 of_node_put(port); 1f0f0151517278 Sandy Huang 2018-08-30 112 1f0f0151517278 Sandy Huang 2018-08-30 113 /* if the rgb output is not connected to anything, just return */ 1f0f0151517278 Sandy Huang 2018-08-30 114 if (!child_count) 1f0f0151517278 Sandy Huang 2018-08-30 115 return NULL; 1f0f0151517278 Sandy Huang 2018-08-30 116 1f0f0151517278 Sandy Huang 2018-08-30 117 if (ret < 0) { 1f0f0151517278 Sandy Huang 2018-08-30 118 if (ret != -EPROBE_DEFER) 1f0f0151517278 Sandy Huang 2018-08-30 119 DRM_DEV_ERROR(dev, "failed to find panel or bridge %d\n", ret); 1f0f0151517278 Sandy Huang 2018-08-30 120 return ERR_PTR(ret); 1f0f0151517278 Sandy Huang 2018-08-30 121 } 1f0f0151517278 Sandy Huang 2018-08-30 122 1f0f0151517278 Sandy Huang 2018-08-30 123 encoder = &rgb->encoder; 1f0f0151517278 Sandy Huang 2018-08-30 124 encoder->possible_crtcs = drm_crtc_mask(crtc); 1f0f0151517278 Sandy Huang 2018-08-30 125 0dbd735448bfdb Thomas Zimmermann 2020-03-05 126 ret = drm_simple_encoder_init(drm_dev, encoder, DRM_MODE_ENCODER_NONE); 1f0f0151517278 Sandy Huang 2018-08-30 127 if (ret < 0) { 1f0f0151517278 Sandy Huang 2018-08-30 128 DRM_DEV_ERROR(drm_dev->dev, 1f0f0151517278 Sandy Huang 2018-08-30 129 "failed to initialize encoder: %d\n", ret); 1f0f0151517278 Sandy Huang 2018-08-30 130 return ERR_PTR(ret); 1f0f0151517278 Sandy Huang 2018-08-30 131 } 1f0f0151517278 Sandy Huang 2018-08-30 132 1f0f0151517278 Sandy Huang 2018-08-30 133 drm_encoder_helper_add(encoder, &rockchip_rgb_encoder_helper_funcs); 1f0f0151517278 Sandy Huang 2018-08-30 134 1f0f0151517278 Sandy Huang 2018-08-30 135 if (panel) { 89958b7cd9555a Laurent Pinchart 2019-09-04 136 bridge = drm_panel_bridge_add_typed(panel, 89958b7cd9555a Laurent Pinchart 2019-09-04 137 DRM_MODE_CONNECTOR_LVDS); 1f0f0151517278 Sandy Huang 2018-08-30 138 if (IS_ERR(bridge)) 1f0f0151517278 Sandy Huang 2018-08-30 139 return ERR_CAST(bridge); 1f0f0151517278 Sandy Huang 2018-08-30 140 } 1f0f0151517278 Sandy Huang 2018-08-30 141 1f0f0151517278 Sandy Huang 2018-08-30 142 rgb->bridge = bridge; 1f0f0151517278 Sandy Huang 2018-08-30 143 a25b988ff83f3c Laurent Pinchart 2020-02-26 144 ret = drm_bridge_attach(encoder, rgb->bridge, NULL, 0); 1f0f0151517278 Sandy Huang 2018-08-30 145 if (ret) { 1f0f0151517278 Sandy Huang 2018-08-30 146 DRM_DEV_ERROR(drm_dev->dev, 1f0f0151517278 Sandy Huang 2018-08-30 147 "failed to attach bridge: %d\n", ret); 1f0f0151517278 Sandy Huang 2018-08-30 148 goto err_free_encoder; 1f0f0151517278 Sandy Huang 2018-08-30 149 } 1f0f0151517278 Sandy Huang 2018-08-30 150 1f0f0151517278 Sandy Huang 2018-08-30 151 return rgb; 1f0f0151517278 Sandy Huang 2018-08-30 152 1f0f0151517278 Sandy Huang 2018-08-30 153 err_free_encoder: 1f0f0151517278 Sandy Huang 2018-08-30 154 drm_encoder_cleanup(encoder); 1f0f0151517278 Sandy Huang 2018-08-30 155 return ERR_PTR(ret); 1f0f0151517278 Sandy Huang 2018-08-30 156 } 1f0f0151517278 Sandy Huang 2018-08-30 157 EXPORT_SYMBOL_GPL(rockchip_rgb_init); 1f0f0151517278 Sandy Huang 2018-08-30 158 1f0f0151517278 Sandy Huang 2018-08-30 @159 void rockchip_rgb_fini(struct rockchip_rgb *rgb) :::::: The code at line 71 was first introduced by commit :::::: 1f0f015151727872be866b6a5b64e07f9e7a3071 drm/rockchip: Add support for Rockchip Soc RGB output interface :::::: TO: Sandy Huang <h...@rock-chips.com> :::::: CC: Heiko Stuebner <he...@sntech.de> --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-...@lists.01.org
.config.gz
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