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SubjectRe: [PATCH 3/3] drm/bridge: Introduce LT9611 DSI to HDMI bridge
Hi Vinod,

I love your patch! Yet something to improve:

[auto build test ERROR on robh/for-next]
[also build test ERROR on drm-intel/for-linux-next drm-tip/drm-tip linus/master v5.7-rc5 next-20200512]
[if your patch is applied to the wrong git tree, please drop us a note to help
improve the system. BTW, we also suggest to use '--base' option to specify the
base tree in git format-patch, please see]

base: for-next
config: i386-allyesconfig (attached as .config)
compiler: gcc-7 (Ubuntu 7.5.0-6ubuntu2) 7.5.0
# save the attached .config to linux build tree
make ARCH=i386

If you fix the issue, kindly add following tag as appropriate
Reported-by: kbuild test robot <>

All errors (new ones prefixed by >>):

drivers/gpu/drm/bridge/lt9611.c: In function 'lt9611_reset':
>> drivers/gpu/drm/bridge/lt9611.c:518:2: error: implicit declaration of function 'gpiod_set_value_cansleep' [-Werror=implicit-function-declaration]
gpiod_set_value_cansleep(lt9611->reset_gpio, 1);
drivers/gpu/drm/bridge/lt9611.c: In function 'lt9611_gpio_init':
>> drivers/gpu/drm/bridge/lt9611.c:963:23: error: implicit declaration of function 'devm_gpiod_get'; did you mean 'devm_iounmap'? [-Werror=implicit-function-declaration]
lt9611->reset_gpio = devm_gpiod_get(dev, "reset", GPIOD_OUT_HIGH);
>> drivers/gpu/drm/bridge/lt9611.c:963:52: error: 'GPIOD_OUT_HIGH' undeclared (first use in this function)
lt9611->reset_gpio = devm_gpiod_get(dev, "reset", GPIOD_OUT_HIGH);
drivers/gpu/drm/bridge/lt9611.c:963:52: note: each undeclared identifier is reported only once for each function it appears in
>> drivers/gpu/drm/bridge/lt9611.c:969:24: error: implicit declaration of function 'devm_gpiod_get_optional'; did you mean 'devm_regulator_get_optional'? [-Werror=implicit-function-declaration]
lt9611->enable_gpio = devm_gpiod_get_optional(dev, "enable",
>> drivers/gpu/drm/bridge/lt9611.c:970:13: error: 'GPIOD_OUT_LOW' undeclared (first use in this function); did you mean 'GPIOD_OUT_HIGH'?
cc1: some warnings being treated as errors

vim +/gpiod_set_value_cansleep +518 drivers/gpu/drm/bridge/lt9611.c

516 static void lt9611_reset(struct lt9611 *lt9611)
517 {
> 518 gpiod_set_value_cansleep(lt9611->reset_gpio, 1);
519 msleep(20);
520 gpiod_set_value_cansleep(lt9611->reset_gpio, 0);
521 msleep(20);
522 gpiod_set_value_cansleep(lt9611->reset_gpio, 1);
523 msleep(100);
524 }

0-DAY CI Kernel Test Service, Intel Corporation
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