linux-kernel - [agd5f:drm-next 423/465] drivers/gpu/drm/amd/amdgpu/../display/amdgpu_dm/amdgpu_dm.c:1427:6: warning: no previous prototype for 'retrieve_dmi

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Date:   Wed, 13 Jul 2022 11:13:14 +0800
From:   kernel test robot <lkp@...el.com>
To:     Fangzhi Zuo <Jerry.Zuo@....com>
Cc:     kbuild-all@...ts.01.org, linux-kernel@...r.kernel.org,
        Alex Deucher <alexander.deucher@....com>
Subject: [agd5f:drm-next 423/465]
 drivers/gpu/drm/amd/amdgpu/../display/amdgpu_dm/amdgpu_dm.c:1427:6: warning:
 no previous prototype for 'retrieve_dmi_info'

tree:   https://gitlab.freedesktop.org/agd5f/linux.git drm-next
head:   0365a66ae4438923eb981c265a2152cc95e89c91
commit: 19a459dfedd49deef6cd3169597df1b414c65f10 [423/465] drm/amd/display: Ignore First MST Sideband Message Return Error
config: i386-allyesconfig (https://download.01.org/0day-ci/archive/20220713/202207131128.zyQigy2v-lkp@intel.com/config)
compiler: gcc-11 (Debian 11.3.0-3) 11.3.0
reproduce (this is a W=1 build):
        git remote add agd5f https://gitlab.freedesktop.org/agd5f/linux.git
        git fetch --no-tags agd5f drm-next
        git checkout 19a459dfedd49deef6cd3169597df1b414c65f10
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        make W=1 O=build_dir ARCH=i386 SHELL=/bin/bash drivers/gpu/drm/

If you fix the issue, kindly add following tag where applicable
Reported-by: kernel test robot <lkp@...el.com>

All warnings (new ones prefixed by >>):

>> drivers/gpu/drm/amd/amdgpu/../display/amdgpu_dm/amdgpu_dm.c:1427:6: warning: no previous prototype for 'retrieve_dmi_info' [-Wmissing-prototypes]
    1427 | void retrieve_dmi_info(struct amdgpu_display_manager *dm)
         |      ^~~~~~~~~~~~~~~~~
   In file included from drivers/gpu/drm/amd/amdgpu/../display/dc/inc/core_types.h:32,
                    from drivers/gpu/drm/amd/amdgpu/../display/dc/inc/link_enc_cfg.h:33,
                    from drivers/gpu/drm/amd/amdgpu/../display/amdgpu_dm/amdgpu_dm.c:32:
   drivers/gpu/drm/amd/amdgpu/../display/include/ddc_service_types.h:137:22: warning: 'SYNAPTICS_DEVICE_ID' defined but not used [-Wunused-const-variable=]
     137 | static const uint8_t SYNAPTICS_DEVICE_ID[] = "SYNA";
         |                      ^~~~~~~~~~~~~~~~~~~
   drivers/gpu/drm/amd/amdgpu/../display/include/ddc_service_types.h:134:17: warning: 'DP_SINK_BRANCH_DEV_NAME_7580' defined but not used [-Wunused-const-variable=]
     134 | static const u8 DP_SINK_BRANCH_DEV_NAME_7580[] = "7580\x80u";
         |                 ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
   drivers/gpu/drm/amd/amdgpu/../display/include/ddc_service_types.h:132:22: warning: 'DP_SINK_DEVICE_STR_ID_2' defined but not used [-Wunused-const-variable=]
     132 | static const uint8_t DP_SINK_DEVICE_STR_ID_2[] = {7, 1, 8, 7, 5, 0};
         |                      ^~~~~~~~~~~~~~~~~~~~~~~
   drivers/gpu/drm/amd/amdgpu/../display/include/ddc_service_types.h:131:22: warning: 'DP_SINK_DEVICE_STR_ID_1' defined but not used [-Wunused-const-variable=]
     131 | static const uint8_t DP_SINK_DEVICE_STR_ID_1[] = {7, 1, 8, 7, 3, 0};
         |                      ^~~~~~~~~~~~~~~~~~~~~~~


vim +/retrieve_dmi_info +1427 drivers/gpu/drm/amd/amdgpu/../display/amdgpu_dm/amdgpu_dm.c

  1426	
> 1427	void retrieve_dmi_info(struct amdgpu_display_manager *dm)
  1428	{
  1429		const struct dmi_system_id *dmi_id;
  1430	
  1431		dm->aux_hpd_discon_quirk = false;
  1432	
  1433		dmi_id = dmi_first_match(hpd_disconnect_quirk_table);
  1434		if (dmi_id) {
  1435			dm->aux_hpd_discon_quirk = true;
  1436			DRM_INFO("aux_hpd_discon_quirk attached\n");
  1437		}
  1438	}
  1439	

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