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

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Date:	Sat, 17 Oct 2015 02:14:04 +0800
From:	kbuild test robot <lkp@...el.com>
To:	CK Hu <ck.hu@...iatek.com>
Cc:	kbuild-all@...org, Rob Herring <robh+dt@...nel.org>,
	Pawel Moll <pawel.moll@....com>,
	Mark Rutland <mark.rutland@....com>,
	Ian Campbell <ijc+devicetree@...lion.org.uk>,
	Kumar Gala <galak@...eaurora.org>,
	David Airlie <airlied@...ux.ie>,
	Matthias Brugger <matthias.bgg@...il.com>,
	Jitao Shi <jitao.shi@...iatek.com>,
	Thierry Reding <treding@...dia.com>,
	Ajay Kumar <ajaykumar.rs@...sung.com>,
	Inki Dae <inki.dae@...sung.com>,
	Rahul Sharma <rahul.sharma@...sung.com>,
	Sean Paul <seanpaul@...omium.org>,
	Vincent Palatin <vpalatin@...omium.org>,
	Andy Yan <andy.yan@...k-chips.com>,
	Philipp Zabel <p.zabel@...gutronix.de>,
	Russell King <rmk+kernel@....linux.org.uk>,
	devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
	dri-devel@...ts.freedesktop.org,
	linux-arm-kernel@...ts.infradead.org,
	linux-mediatek@...ts.infradead.org, srv_heupstream@...iatek.com,
	Sascha Hauer <kernel@...gutronix.de>,
	yingjoe.chen@...iatek.com, eddie.huang@...iatek.com,
	cawa.cheng@...iatek.com
Subject: Re: [RFC 2/2] drm/bridge: Add I2C based driver for ps8640 bridge

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
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