linux-kernel - Re: [PATCH v2 3/3] drm/panel: add panel driver for Leadtek LTK500HD1829

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Message-ID: <201912251756.Sa7kvTwW%lkp@intel.com>
Date:   Wed, 25 Dec 2019 17:14:15 +0800
From:   kbuild test robot <lkp@...el.com>
To:     Heiko Stuebner <heiko@...ech.de>
Cc:     kbuild-all@...ts.01.org, dri-devel@...ts.freedesktop.org,
        thierry.reding@...il.com, sam@...nborg.org, robh+dt@...nel.org,
        mark.rutland@....com, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org,
        christoph.muellner@...obroma-systems.com, heiko@...ech.de,
        Heiko Stuebner <heiko.stuebner@...obroma-systems.com>
Subject: Re: [PATCH v2 3/3] drm/panel: add panel driver for Leadtek
 LTK500HD1829

Hi Heiko,

I love your patch! Perhaps something to improve:

[auto build test WARNING on robh/for-next]
[cannot apply to drm-exynos/exynos-drm-next drm-intel/for-linux-next tegra-drm/drm/tegra/for-next drm-tip/drm-tip linus/master drm/drm-next v5.5-rc3 next-20191220]
[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 https://stackoverflow.com/a/37406982]

url:    https://github.com/0day-ci/linux/commits/Heiko-Stuebner/dt-bindings-Add-vendor-prefix-for-Leadtek-Technology/20191221-062606
base:   https://git.kernel.org/pub/scm/linux/kernel/git/robh/linux.git for-next
reproduce:
        # apt-get install sparse
        # sparse version: v0.6.1-129-g341daf20-dirty
        make ARCH=x86_64 allmodconfig
        make C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__'

If you fix the issue, kindly add following tag
Reported-by: kbuild test robot <lkp@...el.com>


sparse warnings: (new ones prefixed by >>)

>> drivers/gpu/drm/panel/panel-leadtek-ltk500hd1829.c:411:22: sparse: sparse: incorrect type in initializer (different argument counts)
>> drivers/gpu/drm/panel/panel-leadtek-ltk500hd1829.c:411:22: sparse:    expected int ( *get_modes )( ... )
>> drivers/gpu/drm/panel/panel-leadtek-ltk500hd1829.c:411:22: sparse:    got int ( * )( ... )
   drivers/gpu/drm/panel/panel-leadtek-ltk500hd1829.c:463:15: sparse: sparse: undefined identifier 'drm_panel_of_backlight'

vim +411 drivers/gpu/drm/panel/panel-leadtek-ltk500hd1829.c

   407	
   408	static const struct drm_panel_funcs ltk500hd1829_funcs = {
   409		.unprepare = ltk500hd1829_unprepare,
   410		.prepare = ltk500hd1829_prepare,
 > 411		.get_modes = ltk500hd1829_get_modes,
   412	};
   413	

---
0-DAY kernel test infrastructure                 Open Source Technology Center
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