Hi Hsin-Yi,

Thank you for the patch! Yet something to improve:

[auto build test ERROR on drm-misc/drm-misc-next]
[also build test ERROR on linus/master v6.1-rc6 next-20221121]
[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/Hsin-Yi-Wang/drm_bridge-register-content-protect-property/20221115-143025
base:   git://anongit.freedesktop.org/drm/drm-misc drm-misc-next
patch link:    https://lore.kernel.org/r/20221115062835.3785083-1-hsinyi%40chromium.org
patch subject: [PATCH v5 1/3] drm_bridge: register content protect property
config: csky-randconfig-r031-20221121
compiler: csky-linux-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/0eace8a112ea24be1b8f5a9fe390576e74947c93
        git remote add linux-review https://github.com/intel-lab-lkp/linux
        git fetch --no-tags linux-review Hsin-Yi-Wang/drm_bridge-register-content-protect-property/20221115-143025
        git checkout 0eace8a112ea24be1b8f5a9fe390576e74947c93
        # 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=csky 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 >>):

   csky-linux-ld: drivers/gpu/drm/drm_bridge_connector.o: in function `drm_bridge_connector_init':
   drivers/gpu/drm/drm_bridge_connector.c:407: undefined reference to `drm_connector_attach_content_protection_property'
>> csky-linux-ld: drivers/gpu/drm/drm_bridge_connector.c:341: undefined reference to `drm_connector_attach_content_protection_property'

-- 
0-DAY CI Kernel Test Service
https://01.org/lkp