Hi Liu, Thank you for the patch! Perhaps something to improve: [auto build test WARNING on shawnguo/for-next] [also build test WARNING on robh/for-next drm-intel/for-linux-next drm-tip/drm-tip tegra-drm/drm/tegra/for-next linus/master drm-exynos/exynos-drm-next v5.12-rc2 next-20210310] [cannot apply to drm/drm-next] [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] url: https://github.com/0day-ci/linux/commits/Liu-Ying/Add-some-DRM-bridge-dri... base: https://git.kernel.org/pub/scm/linux/kernel/git/shawnguo/linux.git for-next config: mips-allyesconfig (attached as .config) compiler: mips-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://github.com/0day-ci/linux/commit/2018fd6af385c7cad1ce9510fca71cc87... git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Liu-Ying/Add-some-DRM-bridge-drivers-support-for-i-MX8qm-qxp-SoCs/20210310-181047 git checkout 2018fd6af385c7cad1ce9510fca71cc87d6d151b # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=mips 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 >>): 69 | struct phy_configure_opts_lvds *phy_cfg) | ^~~~~~~~~~~~~~~~~~~~~~~ drivers/gpu/drm/bridge/imx/imx8qm-ldb-drv.c: In function 'imx8qm_ldb_set_phy_cfg': drivers/gpu/drm/bridge/imx/imx8qm-ldb-drv.c:71:9: error: dereferencing pointer to incomplete type 'struct phy_configure_opts_lvds' 71 | phy_cfg->bits_per_lane_and_dclk_cycle = 7; | ^~ drivers/gpu/drm/bridge/imx/imx8qm-ldb-drv.c: In function 'imx8qm_ldb_bridge_atomic_check': drivers/gpu/drm/bridge/imx/imx8qm-ldb-drv.c:91:49: error: 'union phy_configure_opts' has no member named 'lvds' 91 | struct phy_configure_opts_lvds *phy_cfg = &opts.lvds; | ^ drivers/gpu/drm/bridge/imx/imx8qm-ldb-drv.c:99:62: error: passing argument 5 of 'imx8qm_ldb_set_phy_cfg' from incompatible pointer type [-Werror=incompatible-pointer-types] 99 | imx8qm_ldb_set_phy_cfg(imx8qm_ldb, di_clk, is_split, false, phy_cfg); | ^~~~~~~ | | | struct phy_configure_opts_lvds * drivers/gpu/drm/bridge/imx/imx8qm-ldb-drv.c:69:40: note: expected 'struct phy_configure_opts_lvds *' but argument is of type 'struct phy_configure_opts_lvds *' 69 | struct phy_configure_opts_lvds *phy_cfg) | ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~ drivers/gpu/drm/bridge/imx/imx8qm-ldb-drv.c:111:10: error: passing argument 5 of 'imx8qm_ldb_set_phy_cfg' from incompatible pointer type [-Werror=incompatible-pointer-types] 111 | phy_cfg); | ^~~~~~~ | | | struct phy_configure_opts_lvds * drivers/gpu/drm/bridge/imx/imx8qm-ldb-drv.c:69:40: note: expected 'struct phy_configure_opts_lvds *' but argument is of type 'struct phy_configure_opts_lvds *' 69 | struct phy_configure_opts_lvds *phy_cfg) | ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~ drivers/gpu/drm/bridge/imx/imx8qm-ldb-drv.c: In function 'imx8qm_ldb_bridge_mode_set': drivers/gpu/drm/bridge/imx/imx8qm-ldb-drv.c:137:49: error: 'union phy_configure_opts' has no member named 'lvds' 137 | struct phy_configure_opts_lvds *phy_cfg = &opts.lvds; | ^ drivers/gpu/drm/bridge/imx/imx8qm-ldb-drv.c:152:62: error: passing argument 5 of 'imx8qm_ldb_set_phy_cfg' from incompatible pointer type [-Werror=incompatible-pointer-types] 152 | imx8qm_ldb_set_phy_cfg(imx8qm_ldb, di_clk, is_split, false, phy_cfg); | ^~~~~~~ | | | struct phy_configure_opts_lvds * drivers/gpu/drm/bridge/imx/imx8qm-ldb-drv.c:69:40: note: expected 'struct phy_configure_opts_lvds *' but argument is of type 'struct phy_configure_opts_lvds *' 69 | struct phy_configure_opts_lvds *phy_cfg) | ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~ drivers/gpu/drm/bridge/imx/imx8qm-ldb-drv.c:161:10: error: passing argument 5 of 'imx8qm_ldb_set_phy_cfg' from incompatible pointer type [-Werror=incompatible-pointer-types] 161 | phy_cfg); | ^~~~~~~ | | | struct phy_configure_opts_lvds * drivers/gpu/drm/bridge/imx/imx8qm-ldb-drv.c:69:40: note: expected 'struct phy_configure_opts_lvds *' but argument is of type 'struct phy_configure_opts_lvds *' 69 | struct phy_configure_opts_lvds *phy_cfg) | ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~ cc1: some warnings being treated as errors vim +69 drivers/gpu/drm/bridge/imx/imx8qm-ldb-drv.c 65 66 static void imx8qm_ldb_set_phy_cfg(struct imx8qm_ldb *imx8qm_ldb, 67 unsigned long di_clk, 68 bool is_split, bool is_slave, 70 { 71 phy_cfg->bits_per_lane_and_dclk_cycle = 7; 72 phy_cfg->lanes = 4; 73 phy_cfg->differential_clk_rate = is_split ? di_clk / 2 : di_clk; 74 phy_cfg->is_slave = is_slave; 75 } 76 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org