Re: [RFC 2/2] drm/bridge: Add I2C based driver for ps8640 bridge

kbuild test robot
2015-10-16T18:14:04Z

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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);

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