[l1k:rpi-6.2.y-await-linktraining 24/583] drivers/gpu/drm/vc4/vc4_hdmi.c:562:5: warning: no previous prototype for function 'vc4_hdmi_connector_get_property'

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

tree:   https://github.com/l1k/linux rpi-6.2.y-await-linktraining
head:   f3a9201f7f484c1295cdec53c1b9bd2a19ffb231
commit: c9f8918a5153ff76ca64371f8117809fbd7e68a6 [24/583] drm/vc4_hdmi: Add Broadcast RGB property to allow override of RGB range
config: arm-randconfig-r046-20230227 (https://download.01.org/0day-ci/archive/20230228/202302280418.UTQ02tZO-lkp@intel.com/config)
compiler: clang version 17.0.0 (https://github.com/llvm/llvm-project db89896bbbd2251fff457699635acbbedeead27f)
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/l1k/linux/commit/c9f8918a5153ff76ca64371f8117809fbd7e68a6
        git remote add l1k https://github.com/l1k/linux
        git fetch --no-tags l1k rpi-6.2.y-await-linktraining
        git checkout c9f8918a5153ff76ca64371f8117809fbd7e68a6
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=arm olddefconfig
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=arm SHELL=/bin/bash drivers/gpu/drm/vc4/ drivers/media/i2c/

If you fix the issue, kindly add following tag where applicable
| Reported-by: kernel test robot <lkp@intel.com>
| Link: https://lore.kernel.org/oe-kbuild-all/202302280418.UTQ02tZO-lkp@intel.com/

All warnings (new ones prefixed by >>):

>> drivers/gpu/drm/vc4/vc4_hdmi.c:562:5: warning: no previous prototype for function 'vc4_hdmi_connector_get_property' [-Wmissing-prototypes]
   int vc4_hdmi_connector_get_property(struct drm_connector *connector,
       ^
   drivers/gpu/drm/vc4/vc4_hdmi.c:562:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
   int vc4_hdmi_connector_get_property(struct drm_connector *connector,
   ^
   static 
>> drivers/gpu/drm/vc4/vc4_hdmi.c:592:5: warning: no previous prototype for function 'vc4_hdmi_connector_set_property' [-Wmissing-prototypes]
   int vc4_hdmi_connector_set_property(struct drm_connector *connector,
       ^
   drivers/gpu/drm/vc4/vc4_hdmi.c:592:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
   int vc4_hdmi_connector_set_property(struct drm_connector *connector,
   ^
   static 
   2 warnings generated.


vim +/vc4_hdmi_connector_get_property +562 drivers/gpu/drm/vc4/vc4_hdmi.c

   551	
   552	/**
   553	 * vc4_hdmi_connector_atomic_get_property - hook for
   554	 *						connector->atomic_get_property.
   555	 * @connector: Connector to get the property for.
   556	 * @state: Connector state to retrieve the property from.
   557	 * @property: Property to retrieve.
   558	 * @val: Return value for the property.
   559	 *
   560	 * Returns the atomic property value for a digital connector.
   561	 */
 > 562	int vc4_hdmi_connector_get_property(struct drm_connector *connector,
   563					    const struct drm_connector_state *state,
   564					    struct drm_property *property,
   565					    uint64_t *val)
   566	{
   567		struct vc4_hdmi *vc4_hdmi = connector_to_vc4_hdmi(connector);
   568		const struct vc4_hdmi_connector_state *vc4_conn_state =
   569					const_conn_state_to_vc4_hdmi_conn_state(state);
   570	
   571		if (property == vc4_hdmi->broadcast_rgb_property) {
   572			*val = vc4_conn_state->broadcast_rgb;
   573		} else {
   574			DRM_DEBUG_ATOMIC("Unknown property [PROP:%d:%s]\n",
   575					 property->base.id, property->name);
   576			return -EINVAL;
   577		}
   578	
   579		return 0;
   580	}
   581	
   582	/**
   583	 * vc4_hdmi_connector_atomic_set_property - hook for
   584	 *						connector->atomic_set_property.
   585	 * @connector: Connector to set the property for.
   586	 * @state: Connector state to set the property on.
   587	 * @property: Property to set.
   588	 * @val: New value for the property.
   589	 *
   590	 * Sets the atomic property value for a digital connector.
   591	 */
 > 592	int vc4_hdmi_connector_set_property(struct drm_connector *connector,
   593					    struct drm_connector_state *state,
   594					    struct drm_property *property,
   595					    uint64_t val)
   596	{
   597		struct vc4_hdmi *vc4_hdmi = connector_to_vc4_hdmi(connector);
   598		struct vc4_hdmi_connector_state *vc4_conn_state =
   599					conn_state_to_vc4_hdmi_conn_state(state);
   600	
   601		if (property == vc4_hdmi->broadcast_rgb_property) {
   602			vc4_conn_state->broadcast_rgb = val;
   603			return 0;
   604		}
   605	
   606		DRM_DEBUG_ATOMIC("Unknown property [PROP:%d:%s]\n",
   607				 property->base.id, property->name);
   608		return -EINVAL;
   609	}
   610	

-- 
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https://github.com/intel/lkp-tests