Hi Jitao, [auto build test ERROR on drm-exynos/exynos-drm/for-next -- if it's inappropriate base, please suggest rules for selecting the more suitable base] url: https://github.com/0day-ci/linux/commits/CK-Hu/Dcumentation-bridge-Add-documentation-for-ps8640-DT-properties/20151016-201658 config: s390-allmodconfig (attached as .config) reproduce: wget https://git.kernel.org/cgit/linux/kernel/git/wfg/lkp-tests.git/plain/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross # save the attached .config to linux build tree make.cross ARCH=s390 All errors (new ones prefixed by >>): drivers/gpu/drm/bridge/parade-ps8640.c: In function 'ps8640_prepare': >> drivers/gpu/drm/bridge/parade-ps8640.c:178:2: error: implicit declaration of function 'gpiod_set_value' [-Werror=implicit-function-declaration] gpiod_set_value(ps_bridge->gpio_pwr_n, 1); ^ drivers/gpu/drm/bridge/parade-ps8640.c: In function 'ps8640_probe': >> drivers/gpu/drm/bridge/parade-ps8640.c:391:2: error: implicit declaration of function 'devm_gpiod_get' [-Werror=implicit-function-declaration] ps_bridge->gpio_mode_sel_n = devm_gpiod_get(&client->dev, "mode-sel", ^ >> drivers/gpu/drm/bridge/parade-ps8640.c:392:11: error: 'GPIOD_OUT_HIGH' undeclared (first use in this function) GPIOD_OUT_HIGH); ^ drivers/gpu/drm/bridge/parade-ps8640.c:392:11: note: each undeclared identifier is reported only once for each function it appears in >> drivers/gpu/drm/bridge/parade-ps8640.c:399:2: error: implicit declaration of function 'gpiod_direction_output' [-Werror=implicit-function-declaration] ret = gpiod_direction_output(ps_bridge->gpio_mode_sel_n, 1); ^ cc1: some warnings being treated as errors vim +/gpiod_set_value +178 drivers/gpu/drm/bridge/parade-ps8640.c 172 err = regulator_enable(ps_bridge->pwr_3v3_supply); 173 if (err < 0) { 174 DRM_ERROR("failed to enable pwr_3v3_supply: %d\n", err); 175 return; 176 } 177 > 178 gpiod_set_value(ps_bridge->gpio_pwr_n, 1); 179 gpiod_set_value(ps_bridge->gpio_rst_n, 0); 180 usleep_range(500, 700); 181 gpiod_set_value(ps_bridge->gpio_rst_n, 1); --- 0-DAY kernel test infrastructure Open Source Technology Center https://lists.01.org/pipermail/kbuild-all Intel Corporation
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