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Date:   Sun, 29 Jan 2023 02:57:37 +0800
From:   kernel test robot <lkp@...el.com>
To:     Jonathan Cormier <jcormier@...ticallink.com>,
        Andrzej Hajda <andrzej.hajda@...el.com>,
        Neil Armstrong <neil.armstrong@...aro.org>,
        Robert Foss <robert.foss@...aro.org>,
        Laurent Pinchart <Laurent.pinchart@...asonboard.com>,
        Jonas Karlman <jonas@...boo.se>,
        Jernej Skrabec <jernej.skrabec@...il.com>,
        David Airlie <airlied@...il.com>,
        Daniel Vetter <daniel@...ll.ch>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzk@...nel.org>,
        Tomi Valkeinen <tomi.valkeinen@...com>,
        Jyri Sarha <jsarha@...com>
Cc:     oe-kbuild-all@...ts.linux.dev, dri-devel@...ts.freedesktop.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        Michael Williamson <michael.williamson@...ticallink.com>,
        Bob Duke <bduke@...ticallink.com>,
        Jonathan Cormier <jcormier@...ticallink.com>
Subject: Re: [PATCH 4/4] DRM: BRIDGE: TFP410: If connected, use I2C for
 polled HPD status.

Hi Jonathan,

Thank you for the patch! Perhaps something to improve:

[auto build test WARNING on 93f875a8526a291005e7f38478079526c843cbec]

url:    https://github.com/intel-lab-lkp/linux/commits/Jonathan-Cormier/dt-bindings-display-bridge-tfp410-Add-tfp410-i2c-example/20230128-183627
base:   93f875a8526a291005e7f38478079526c843cbec
patch link:    https://lore.kernel.org/r/20230125-tfp410_i2c-v1-4-66a4d4e390b7%40criticallink.com
patch subject: [PATCH 4/4] DRM: BRIDGE: TFP410: If connected, use I2C for polled HPD status.
config: x86_64-allyesconfig (https://download.01.org/0day-ci/archive/20230129/202301290252.zgcWeegX-lkp@intel.com/config)
compiler: gcc-11 (Debian 11.3.0-8) 11.3.0
reproduce (this is a W=1 build):
        # https://github.com/intel-lab-lkp/linux/commit/c4659fa4c02b62087c095ca99978e5eac8b490de
        git remote add linux-review https://github.com/intel-lab-lkp/linux
        git fetch --no-tags linux-review Jonathan-Cormier/dt-bindings-display-bridge-tfp410-Add-tfp410-i2c-example/20230128-183627
        git checkout c4659fa4c02b62087c095ca99978e5eac8b490de
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        make W=1 O=build_dir ARCH=x86_64 olddefconfig
        make W=1 O=build_dir ARCH=x86_64 SHELL=/bin/bash drivers/gpu/

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/bridge/ti-tfp410.c: In function 'tfp410_connector_detect':
>> drivers/gpu/drm/bridge/ti-tfp410.c:111:13: warning: unused variable 'val' [-Wunused-variable]
     111 |         u32 val;
         |             ^~~


vim +/val +111 drivers/gpu/drm/bridge/ti-tfp410.c

   106	
   107	static enum drm_connector_status
   108	tfp410_connector_detect(struct drm_connector *connector, bool force)
   109	{
   110		struct tfp410 *dvi = drm_connector_to_tfp410(connector);
 > 111		u32 val;
   112		unsigned int ret;
   113	
   114		if (dvi->i2c) {
   115			ret = regmap_test_bits(dvi->regmap, TFP410_REG_CTL_2_MODE, TFP410_BIT_HTPLG);
   116			if (ret < 0)
   117				dev_err(dvi->dev, "%s failed to read HTPLG bit : %d\n", __func__, ret);
   118			else
   119				return ret ? connector_status_connected : connector_status_disconnected;
   120		}
   121	
   122		return drm_bridge_detect(dvi->next_bridge);
   123	}
   124	

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

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