Hi Pin-yen,

Thank you for the patch! Yet something to improve:

[auto build test ERROR on drm-misc/drm-misc-next]
[also build test ERROR on driver-core/driver-core-testing driver-core/driver-core-next driver-core/driver-core-linus chrome-platform/for-next drm/drm-next linus/master v6.2-rc2 next-20230105]
[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/Pin-yen-Lin/device-property-Add-remote-endpoint-to-devcon-matcher/20230105-212902
base:   git://anongit.freedesktop.org/drm/drm-misc drm-misc-next
patch link:    https://lore.kernel.org/r/20230105132457.4125372-4-treapking%40chromium.org
patch subject: [PATCH v7 3/9] drm/display: Add Type-C switch helpers
config: arm-defconfig
compiler: arm-linux-gnueabi-gcc (GCC) 12.1.0
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://github.com/intel-lab-lkp/linux/commit/c037bdca262df88564fff58cb5233d50180c7215
        git remote add linux-review https://github.com/intel-lab-lkp/linux
        git fetch --no-tags linux-review Pin-yen-Lin/device-property-Add-remote-endpoint-to-devcon-matcher/20230105-212902
        git checkout c037bdca262df88564fff58cb5233d50180c7215
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.1.0 make.cross W=1 O=build_dir ARCH=arm olddefconfig
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.1.0 make.cross W=1 O=build_dir ARCH=arm SHELL=/bin/bash

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

All errors (new ones prefixed by >>):

   arm-linux-gnueabi-ld: drivers/gpu/drm/display/drm_dp_helper.o: in function `drm_dp_unregister_typec_switches':
>> drm_dp_helper.c:(.text+0x1298): undefined reference to `typec_mux_unregister'
   arm-linux-gnueabi-ld: drivers/gpu/drm/display/drm_dp_helper.o: in function `drm_dp_register_typec_switches':
>> drm_dp_helper.c:(.text+0x160c): undefined reference to `typec_mux_register'
>> arm-linux-gnueabi-ld: drm_dp_helper.c:(.text+0x16e8): undefined reference to `typec_mux_unregister'

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