Re: [RFC PATCH 2/6] drm: Add skeleton for EPDC driver

[kernel test robot <lkp@intel.com>]

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Hi Andreas,

[FYI, it's a private test report for your RFC patch.]
[auto build test WARNING on drm/drm-next]
[also build test WARNING on robh/for-next v5.17-rc2 next-20220204]
[cannot apply to pza/reset/next]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch]

url:    https://github.com/0day-ci/linux/commits/Andreas-Kemnade/drm-EPDC-driver-for-i-MX6/20220206-162244
base:   git://anongit.freedesktop.org/drm/drm drm-next
config: arc-allyesconfig (https://download.01.org/0day-ci/archive/20220206/202202061826.LPDjzpu4-lkp(a)intel.com/config)
compiler: arceb-elf-gcc (GCC) 11.2.0
reproduce (this is a W=1 build):
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # https://github.com/0day-ci/linux/commit/866c716aefa059db036e47d33b3002d59a6b7428
        git remote add linux-review https://github.com/0day-ci/linux
        git fetch --no-tags linux-review Andreas-Kemnade/drm-EPDC-driver-for-i-MX6/20220206-162244
        git checkout 866c716aefa059db036e47d33b3002d59a6b7428
        # save the config file to linux build tree
        mkdir build_dir
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross O=build_dir ARCH=arc SHELL=/bin/bash drivers/gpu/drm/mxc-epdc/

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@intel.com>

All warnings (new ones prefixed by >>):

>> drivers/gpu/drm/mxc-epdc/mxc_epdc_drv.c:111:5: warning: no previous prototype for 'mxc_epdc_output' [-Wmissing-prototypes]
     111 | int mxc_epdc_output(struct drm_device *drm)
         |     ^~~~~~~~~~~~~~~


vim +/mxc_epdc_output +111 drivers/gpu/drm/mxc-epdc/mxc_epdc_drv.c

   110	
 > 111	int mxc_epdc_output(struct drm_device *drm)
   112	{
   113		struct mxc_epdc *priv = to_mxc_epdc(drm);
   114		int ret;
   115	
   116		priv->connector.dpms = DRM_MODE_DPMS_OFF;
   117		priv->connector.polled = 0;
   118		drm_connector_helper_add(&priv->connector,
   119					 &mxc_epdc_connector_helper_funcs);
   120		ret = drm_connector_init(drm, &priv->connector,
   121					 &mxc_epdc_connector_funcs,
   122					 DRM_MODE_CONNECTOR_Unknown);
   123		if (ret)
   124			return ret;
   125		ret = of_get_display_timing(drm->dev->of_node, "timing", &priv->timing);
   126		if (ret)
   127			return ret;
   128	
   129		return 0;
   130	}
   131	

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all(a)lists.01.org