[PATCH] drm/connector: Add of_drm_find_connector

[kernel test robot]

Hi Andy,

Thank you for the patch! Perhaps something to improve:

[auto build test WARNING on linus/master]
[also build test WARNING on v5.8-rc3 next-20200701]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use  as documented in
https://git-scm.com/docs/git-format-patch]

url:    https://github.com/0day-ci/linux/commits/Andy-Yan/drm-connector-Add-of_drm_find_connector/20200701-151333
base:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git 7c30b859a947535f2213277e827d7ac7dcff9c84
config: x86_64-randconfig-a002-20200701 (attached as .config)
compiler: clang version 11.0.0 (https://github.com/llvm/llvm-project c8f1d442d0858f66fd4128fde6f67eb5202fa2b1)
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
        # install x86_64 cross compiling tool for clang build
        # apt-get install binutils-x86-64-linux-gnu
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=x86_64 

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

All warnings (new ones prefixed by >>):

>> drivers/gpu/drm/drm_connector.c:756:23: warning: no previous prototype for function 'of_drm_find_connector' [-Wmissing-prototypes]
   struct drm_connector *of_drm_find_connector(struct drm_device *dev, const struct device_node *np)
                         ^
   drivers/gpu/drm/drm_connector.c:756:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
   struct drm_connector *of_drm_find_connector(struct drm_device *dev, const struct device_node *np)
   ^
   static 
   1 warning generated.

vim +/of_drm_find_connector +756 drivers/gpu/drm/drm_connector.c

   745	
   746	#ifdef CONFIG_OF
   747	/**
   748	 * of_drm_find_connector - look up a connector using a device tree node
   749	 * @np: device tree node of the connector
   750	 *
   751	 *
   752	 * Return: A pointer to the connector which match the specified device tree
   753	 * node or NULL if no panel matching the device tree node can be found, or
   754	 * -ENODEV: the device is not available (status != "okay" or "ok")
   755	 */
 > 756	struct drm_connector *of_drm_find_connector(struct drm_device *dev, const struct device_node *np)
   757	{
   758		struct drm_connector *connector;
   759		struct drm_connector_list_iter conn_iter;
   760	
   761		if (!of_device_is_available(np))
   762			return ERR_PTR(-ENODEV);
   763	
   764		drm_connector_list_iter_begin(dev, &conn_iter);
   765		drm_for_each_connector_iter(connector, &conn_iter) {
   766			if (connector->of_node == np) {
   767				drm_connector_list_iter_end(&conn_iter);
   768				return connector;
   769			}
   770		}
   771		drm_connector_list_iter_end(&conn_iter);
   772	
   773		return NULL;
   774	}
   775	EXPORT_SYMBOL(of_drm_find_connector);
   776	#endif
   777	
   778	

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