tree: https://github.com/superna9999/linux amlogic/v5.17/g12-dsi head: 62dac9179f2937dc08bffe08d15c6846bc4aedb4 commit: e1e87e576f5befbf752a2c7b9c019328f1742d71 [5/23] fixup! WIP: drm/meson: add DSI encoder config: arm64-allyesconfig (https://download.01.org/0day-ci/archive/20211212/202112120146.AUKDx0AX-lk...) compiler: aarch64-linux-gcc (GCC) 11.2.0 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/superna9999/linux/commit/e1e87e576f5befbf752a2c7b9c019... git remote add superna9999 https://github.com/superna9999/linux git fetch --no-tags superna9999 amlogic/v5.17/g12-dsi git checkout e1e87e576f5befbf752a2c7b9c019328f1742d71 # save the config file to linux build tree mkdir build_dir COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross O=build_dir ARCH=arm64 SHELL=/bin/bash If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; Note: the superna9999/amlogic/v5.17/g12-dsi HEAD 62dac9179f2937dc08bffe08d15c6846bc4aedb4 builds fine. It only hurts bisectability. All errors (new ones prefixed by >>): drivers/gpu/drm/meson/meson_encoder_dsi.c: In function 'meson_encoder_dsi_atomic_enable': 72 | meson_vclk_setup(priv, MESON_VCLK_TARGET_DSI, mode->clock * 1000, 0, 0, 0, false); | ^~~~~~~~~~~~~~~~ 72 | meson_vclk_setup(priv, MESON_VCLK_TARGET_DSI, mode->clock * 1000, 0, 0, 0, false); | ^~~~~~~~~~~~~~~~~~~~~ drivers/gpu/drm/meson/meson_encoder_dsi.c:72:32: note: each undeclared identifier is reported only once for each function it appears in drivers/gpu/drm/meson/meson_encoder_dsi.c:74:9: error: implicit declaration of function 'meson_venc_encoder_dsi_mode_set'; did you mean 'meson_venc_mipi_dsi_mode_set'? [-Werror=implicit-function-declaration] 74 | meson_venc_encoder_dsi_mode_set(priv, mode); | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ | meson_venc_mipi_dsi_mode_set drivers/gpu/drm/meson/meson_encoder_dsi.c: At top level: 96 | .atomic_check = meson_encoder_dsi_atomic_check, | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ | meson_encoder_dsi_atomic_enable drivers/gpu/drm/meson/meson_encoder_dsi.c:84:13: warning: 'meson_encoder_dsi_atomic_disable' defined but not used [-Wunused-function] 84 | static void meson_encoder_dsi_atomic_disable(struct drm_bridge *bridge, | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ drivers/gpu/drm/meson/meson_encoder_dsi.c:45:13: warning: 'meson_encoder_dsi_atomic_enable' defined but not used [-Wunused-function] 45 | static void meson_encoder_dsi_atomic_enable(struct drm_bridge *bridge, | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ cc1: some warnings being treated as errors vim +/meson_vclk_setup +72 drivers/gpu/drm/meson/meson_encoder_dsi.c 44 45 static void meson_encoder_dsi_atomic_enable(struct drm_bridge *bridge, 46 struct drm_bridge_state *bridge_state) 47 { 48 struct meson_encoder_dsi *encoder_dsi = bridge_to_meson_encoder_dsi(bridge); 49 struct drm_atomic_state *state = bridge_state->base.state; 50 struct meson_drm *priv = encoder_dsi->priv; 51 struct drm_connector_state *conn_state; 52 struct drm_crtc_state *crtc_state; 53 struct drm_connector *connector; 54 struct drm_display_mode *mode; 55 56 connector = drm_atomic_get_new_connector_for_encoder(state, bridge->encoder); 57 if (WARN_ON(!connector)) 58 return; 59 60 conn_state = drm_atomic_get_new_connector_state(state, connector); 61 if (WARN_ON(!conn_state)) 62 return; 63 64 crtc_state = drm_atomic_get_new_crtc_state(state, conn_state->crtc); 65 if (WARN_ON(!crtc_state)) 66 return; 67 68 mode = &crtc_state->adjusted_mode; 69 if (WARN_ON(!mode)) 70 return; 71 73 74 meson_venc_encoder_dsi_mode_set(priv, mode); 75 76 meson_encl_load_gamma(priv); 77 78 writel_bits_relaxed(BIT(3), BIT(3), priv->io_base + _REG(ENCL_VIDEO_MODE_ADV)); 79 writel_relaxed(0, priv->io_base + _REG(ENCL_TST_EN)); 80 81 writel_relaxed(1, priv->io_base + _REG(ENCL_VIDEO_EN)); 82 } 83 84 static void meson_encoder_dsi_atomic_disable(struct drm_bridge *bridge, 85 struct drm_bridge_state *bridge_state) 86 { 87 struct meson_encoder_dsi *meson_encoder_dsi = 88 bridge_to_meson_encoder_dsi(bridge); 89 struct meson_drm *priv = meson_encoder_dsi->priv; 90 91 writel_relaxed(0, priv->io_base + _REG(ENCL_VIDEO_EN)); 92 } 93 94 static const struct drm_bridge_funcs meson_encoder_dsi_bridge_funcs = { 95 .attach = meson_encoder_dsi_attach, 97 .atomic_enable = meson_encoder_dsi_atomic_check, 98 .atomic_disable = meson_encoder_dsi_atomic_check, 99 .atomic_check = meson_encoder_dsi_atomic_check, 100 .atomic_duplicate_state = drm_atomic_helper_bridge_duplicate_state, 101 .atomic_destroy_state = drm_atomic_helper_bridge_destroy_state, 102 .atomic_reset = drm_atomic_helper_bridge_reset, 103 }; 104 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org