linux-kernel - [tobetter:odroid-5.17.y 4/41] drivers/gpu/drm/drm_mipi_dbi.c:77:17: warning: unused variable 'mipi_dbi_dcs_read

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Message-ID: <202203032157.rhC4yqLG-lkp@intel.com>
Date:   Thu, 3 Mar 2022 21:34:46 +0800
From:   kernel test robot <lkp@...el.com>
To:     Dongjin Kim <tobetter@...il.com>
Cc:     llvm@...ts.linux.dev, kbuild-all@...ts.01.org,
        linux-kernel@...r.kernel.org
Subject: [tobetter:odroid-5.17.y 4/41] drivers/gpu/drm/drm_mipi_dbi.c:77:17:
 warning: unused variable 'mipi_dbi_dcs_read_commands'

tree:   https://github.com/tobetter/linux odroid-5.17.y
head:   e882d3aa45fcf49791433e9606016225df72a12e
commit: cac3180b84c170a7d3e892f4c9058b58c19bbc94 [4/41] ODROID-COMMON: gpu/drm: Add new Tiny DRM driver with Ili9488
config: hexagon-randconfig-r013-20220303 (https://download.01.org/0day-ci/archive/20220303/202203032157.rhC4yqLG-lkp@intel.com/config)
compiler: clang version 15.0.0 (https://github.com/llvm/llvm-project d271fc04d5b97b12e6b797c6067d3c96a8d7470e)
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
        # https://github.com/tobetter/linux/commit/cac3180b84c170a7d3e892f4c9058b58c19bbc94
        git remote add tobetter https://github.com/tobetter/linux
        git fetch --no-tags tobetter odroid-5.17.y
        git checkout cac3180b84c170a7d3e892f4c9058b58c19bbc94
        # save the config file to linux build tree
        mkdir build_dir
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=hexagon SHELL=/bin/bash

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

All warnings (new ones prefixed by >>):

>> drivers/gpu/drm/drm_mipi_dbi.c:77:17: warning: unused variable 'mipi_dbi_dcs_read_commands' [-Wunused-const-variable]
   static const u8 mipi_dbi_dcs_read_commands[] = {
                   ^
   1 warning generated.


vim +/mipi_dbi_dcs_read_commands +77 drivers/gpu/drm/drm_mipi_dbi.c

02dd95fe316936 drivers/gpu/drm/tinydrm/mipi-dbi.c Noralf Trønnes 2017-01-22   76  
02dd95fe316936 drivers/gpu/drm/tinydrm/mipi-dbi.c Noralf Trønnes 2017-01-22  @77  static const u8 mipi_dbi_dcs_read_commands[] = {
02dd95fe316936 drivers/gpu/drm/tinydrm/mipi-dbi.c Noralf Trønnes 2017-01-22   78  	MIPI_DCS_GET_DISPLAY_ID,
02dd95fe316936 drivers/gpu/drm/tinydrm/mipi-dbi.c Noralf Trønnes 2017-01-22   79  	MIPI_DCS_GET_RED_CHANNEL,
02dd95fe316936 drivers/gpu/drm/tinydrm/mipi-dbi.c Noralf Trønnes 2017-01-22   80  	MIPI_DCS_GET_GREEN_CHANNEL,
02dd95fe316936 drivers/gpu/drm/tinydrm/mipi-dbi.c Noralf Trønnes 2017-01-22   81  	MIPI_DCS_GET_BLUE_CHANNEL,
02dd95fe316936 drivers/gpu/drm/tinydrm/mipi-dbi.c Noralf Trønnes 2017-01-22   82  	MIPI_DCS_GET_DISPLAY_STATUS,
02dd95fe316936 drivers/gpu/drm/tinydrm/mipi-dbi.c Noralf Trønnes 2017-01-22   83  	MIPI_DCS_GET_POWER_MODE,
02dd95fe316936 drivers/gpu/drm/tinydrm/mipi-dbi.c Noralf Trønnes 2017-01-22   84  	MIPI_DCS_GET_ADDRESS_MODE,
02dd95fe316936 drivers/gpu/drm/tinydrm/mipi-dbi.c Noralf Trønnes 2017-01-22   85  	MIPI_DCS_GET_PIXEL_FORMAT,
02dd95fe316936 drivers/gpu/drm/tinydrm/mipi-dbi.c Noralf Trønnes 2017-01-22   86  	MIPI_DCS_GET_DISPLAY_MODE,
02dd95fe316936 drivers/gpu/drm/tinydrm/mipi-dbi.c Noralf Trønnes 2017-01-22   87  	MIPI_DCS_GET_SIGNAL_MODE,
02dd95fe316936 drivers/gpu/drm/tinydrm/mipi-dbi.c Noralf Trønnes 2017-01-22   88  	MIPI_DCS_GET_DIAGNOSTIC_RESULT,
02dd95fe316936 drivers/gpu/drm/tinydrm/mipi-dbi.c Noralf Trønnes 2017-01-22   89  	MIPI_DCS_READ_MEMORY_START,
02dd95fe316936 drivers/gpu/drm/tinydrm/mipi-dbi.c Noralf Trønnes 2017-01-22   90  	MIPI_DCS_READ_MEMORY_CONTINUE,
02dd95fe316936 drivers/gpu/drm/tinydrm/mipi-dbi.c Noralf Trønnes 2017-01-22   91  	MIPI_DCS_GET_SCANLINE,
02dd95fe316936 drivers/gpu/drm/tinydrm/mipi-dbi.c Noralf Trønnes 2017-01-22   92  	MIPI_DCS_GET_DISPLAY_BRIGHTNESS,
02dd95fe316936 drivers/gpu/drm/tinydrm/mipi-dbi.c Noralf Trønnes 2017-01-22   93  	MIPI_DCS_GET_CONTROL_DISPLAY,
02dd95fe316936 drivers/gpu/drm/tinydrm/mipi-dbi.c Noralf Trønnes 2017-01-22   94  	MIPI_DCS_GET_POWER_SAVE,
02dd95fe316936 drivers/gpu/drm/tinydrm/mipi-dbi.c Noralf Trønnes 2017-01-22   95  	MIPI_DCS_GET_CABC_MIN_BRIGHTNESS,
02dd95fe316936 drivers/gpu/drm/tinydrm/mipi-dbi.c Noralf Trønnes 2017-01-22   96  	MIPI_DCS_READ_DDB_START,
02dd95fe316936 drivers/gpu/drm/tinydrm/mipi-dbi.c Noralf Trønnes 2017-01-22   97  	MIPI_DCS_READ_DDB_CONTINUE,
02dd95fe316936 drivers/gpu/drm/tinydrm/mipi-dbi.c Noralf Trønnes 2017-01-22   98  	0, /* sentinel */
02dd95fe316936 drivers/gpu/drm/tinydrm/mipi-dbi.c Noralf Trønnes 2017-01-22   99  };
02dd95fe316936 drivers/gpu/drm/tinydrm/mipi-dbi.c Noralf Trønnes 2017-01-22  100  

:::::: The code at line 77 was first introduced by commit
:::::: 02dd95fe316936269a52d6ccb971bb956412b40a drm/tinydrm: Add MIPI DBI support

:::::: TO: Noralf Trønnes <noralf@...nnes.org>
:::::: CC: Noralf Trønnes <noralf@...nnes.org>

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