linux-kernel - Re: [PATCH 3/8] drm/loongson: Allow attach drm bridge driver by calling lsdc_output

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Date:   Mon, 30 Oct 2023 08:12:24 +0800
From:   kernel test robot <lkp@...el.com>
To:     Sui Jingfeng <suijingfeng@...ngson.cn>,
        Maxime Ripard <mripard@...nel.org>,
        Thomas Zimmermann <tzimmermann@...e.de>
Cc:     oe-kbuild-all@...ts.linux.dev, dri-devel@...ts.freedesktop.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH 3/8] drm/loongson: Allow attach drm bridge driver by
 calling lsdc_output_init()

Hi Sui,

kernel test robot noticed the following build warnings:

[auto build test WARNING on drm-misc/drm-misc-next]
[also build test WARNING on linus/master v6.6-rc7 next-20231027]
[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#_base_tree_information]

url:    https://github.com/intel-lab-lkp/linux/commits/Sui-Jingfeng/drm-loongson-Introduce-a-minimal-support-for-Loongson-VBIOS/20231030-034730
base:   git://anongit.freedesktop.org/drm/drm-misc drm-misc-next
patch link:    https://lore.kernel.org/r/20231029194607.379459-4-suijingfeng%40loongson.cn
patch subject: [PATCH 3/8] drm/loongson: Allow attach drm bridge driver by calling lsdc_output_init()
config: loongarch-randconfig-002-20231030 (https://download.01.org/0day-ci/archive/20231030/202310300738.zcudNQfj-lkp@intel.com/config)
compiler: loongarch64-linux-gcc (GCC) 13.2.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20231030/202310300738.zcudNQfj-lkp@intel.com/reproduce)

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@...el.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202310300738.zcudNQfj-lkp@intel.com/

All warnings (new ones prefixed by >>):

>> drivers/gpu/drm/loongson/lsdc_output.c:555:5: warning: no previous prototype for 'lsdc_encoder_init' [-Wmissing-prototypes]
     555 | int lsdc_encoder_init(struct drm_device *ddev,
         |     ^~~~~~~~~~~~~~~~~
>> drivers/gpu/drm/loongson/lsdc_output.c:578:5: warning: no previous prototype for 'lsdc_connector_init' [-Wmissing-prototypes]
     578 | int lsdc_connector_init(struct drm_device *ddev,
         |     ^~~~~~~~~~~~~~~~~~~


vim +/lsdc_encoder_init +555 drivers/gpu/drm/loongson/lsdc_output.c

   554	
 > 555	int lsdc_encoder_init(struct drm_device *ddev,
   556			      struct lsdc_output *output,
   557			      unsigned int pipe)
   558	{
   559		const struct lsdc_output_desc *descp = output->descp;
   560		struct drm_encoder *encoder = &output->encoder;
   561		int ret;
   562	
   563		ret = drm_encoder_init(ddev,
   564				       encoder,
   565				       descp->encoder_funcs,
   566				       descp->encoder_type,
   567				       descp->name);
   568		if (ret)
   569			return ret;
   570	
   571		encoder->possible_crtcs = BIT(pipe);
   572	
   573		drm_encoder_helper_add(encoder, descp->encoder_helper_funcs);
   574	
   575		return 0;
   576	}
   577	
 > 578	int lsdc_connector_init(struct drm_device *ddev,
   579				struct lsdc_output *output,
   580				struct i2c_adapter *ddc,
   581				unsigned int pipe)
   582	{
   583		const struct lsdc_output_desc *descp = output->descp;
   584		struct drm_connector *connector = &output->connector;
   585		int ret;
   586	
   587		ret = drm_connector_init_with_ddc(ddev,
   588						  connector,
   589						  descp->connector_funcs,
   590						  descp->connector_type,
   591						  ddc);
   592		if (ret)
   593			return ret;
   594	
   595		drm_connector_helper_add(connector, descp->connector_helper_funcs);
   596	
   597		drm_connector_attach_encoder(connector, &output->encoder);
   598	
   599		connector->polled = DRM_CONNECTOR_POLL_CONNECT |
   600				    DRM_CONNECTOR_POLL_DISCONNECT;
   601	
   602		connector->interlace_allowed = 0;
   603		connector->doublescan_allowed = 0;
   604	
   605		drm_info(ddev, "DisplayPipe-%u has %s\n", pipe, descp->name);
   606	
   607		return 0;
   608	}
   609	

-- 
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki