linux-kernel - panel-edp.c:undefined reference to `drm_panel_dp_aux

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Date:   Thu, 23 Dec 2021 00:34:22 +0800
From:   kernel test robot <lkp@...el.com>
To:     Arnd Bergmann <arnd@...db.de>
Cc:     kbuild-all@...ts.01.org, linux-kernel@...r.kernel.org,
        Daniel Vetter <daniel.vetter@...ll.ch>,
        Javier Martinez Canillas <javierm@...hat.com>
Subject: panel-edp.c:undefined reference to `drm_panel_dp_aux_backlight'

Hi Arnd,

FYI, the error/warning still remains.

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   2f47a9a4dfa3674fad19a49b40c5103a9a8e1589
commit: 9d6366e743f37d36ef69347924ead7bcc596076e drm: fb_helper: improve CONFIG_FB dependency
date:   7 weeks ago
config: arm-qcom_defconfig (https://download.01.org/0day-ci/archive/20211223/202112230025.jXiCKbua-lkp@intel.com/config)
compiler: arm-linux-gnueabi-gcc (GCC) 11.2.0
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://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=9d6366e743f37d36ef69347924ead7bcc596076e
        git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
        git fetch --no-tags linus master
        git checkout 9d6366e743f37d36ef69347924ead7bcc596076e
        # save the config file to linux build tree
        mkdir build_dir
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross O=build_dir ARCH=arm SHELL=/bin/bash

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

All errors (new ones prefixed by >>):

   arm-linux-gnueabi-ld: drivers/gpu/drm/panel/panel-edp.o: in function `panel_edp_probe':
>> panel-edp.c:(.text+0xf38): undefined reference to `drm_panel_dp_aux_backlight'

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