Hi Hans,

I love your patch! Perhaps something to improve:

[auto build test WARNING on drm-intel/for-linux-next]
[also build test WARNING on usb/usb-testing drm-tip/drm-tip linus/master v5.12 next-20210505]
[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/Hans-de-Goede/drm-usb-type-c-Add-support-for-out-of-band-hotplug-notification-v3/20210506-002624
base:   git://anongit.freedesktop.org/drm-intel for-linux-next
config: arm-randconfig-r033-20210505 (attached as .config)
compiler: clang version 13.0.0 (https://github.com/llvm/llvm-project 8f5a2a5836cc8e4c1def2bdeb022e7b496623439)
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 arm cross compiling tool for clang build
        # apt-get install binutils-arm-linux-gnueabi
        # https://github.com/0day-ci/linux/commit/5085315617add59089e87c8b5e2807ef530a2a34
        git remote add linux-review https://github.com/0day-ci/linux
        git fetch --no-tags linux-review Hans-de-Goede/drm-usb-type-c-Add-support-for-out-of-band-hotplug-notification-v3/20210506-002624
        git checkout 5085315617add59089e87c8b5e2807ef530a2a34
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 ARCH=arm 

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 >>):

   In file included from drivers/gpu/drm/selftests/test-drm_framebuffer.c:12:
>> drivers/gpu/drm/selftests/../drm_crtc_internal.h:188:59: warning: declaration of 'struct fwnode_handle' will not be visible outside of this function [-Wvisibility]
   struct drm_connector *drm_connector_find_by_fwnode(struct fwnode_handle *fwnode);
                                                             ^
   1 warning generated.


vim +188 drivers/gpu/drm/selftests/../drm_crtc_internal.h

   172	
   173	/* IOCTL */
   174	int drm_mode_getencoder(struct drm_device *dev,
   175				void *data, struct drm_file *file_priv);
   176	
   177	/* drm_connector.c */
   178	void drm_connector_ida_init(void);
   179	void drm_connector_ida_destroy(void);
   180	void drm_connector_unregister_all(struct drm_device *dev);
   181	int drm_connector_register_all(struct drm_device *dev);
   182	int drm_connector_set_obj_prop(struct drm_mode_object *obj,
   183					    struct drm_property *property,
   184					    uint64_t value);
   185	int drm_connector_create_standard_properties(struct drm_device *dev);
   186	const char *drm_get_connector_force_name(enum drm_connector_force force);
   187	void drm_connector_free_work_fn(struct work_struct *work);
 > 188	struct drm_connector *drm_connector_find_by_fwnode(struct fwnode_handle *fwnode);
   189	

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