Re: [PATCH v4 08/13] drm/bridge: analogix_dp: Add new API analogix_dp_finish_probe()

[kernel test robot <lkp@intel.com>]

Hi Damon,

kernel test robot noticed the following build errors:

[auto build test ERROR on drm-exynos/exynos-drm-next]
[also build test ERROR on rockchip/for-next linus/master v6.17-rc1 next-20250815]
[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/Damon-Ding/drm-bridge-analogix_dp-Formalize-the-struct-analogix_dp_device/20250814-185009
base:   https://git.kernel.org/pub/scm/linux/kernel/git/daeinki/drm-exynos.git exynos-drm-next
patch link:    https://lore.kernel.org/r/20250814104753.195255-9-damon.ding%40rock-chips.com
patch subject: [PATCH v4 08/13] drm/bridge: analogix_dp: Add new API analogix_dp_finish_probe()
config: x86_64-randconfig-001-20250816 (https://download.01.org/0day-ci/archive/20250816/202508160857.yC3oMucJ-lkp@intel.com/config)
compiler: gcc-12 (Debian 12.2.0-14+deb12u1) 12.2.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250816/202508160857.yC3oMucJ-lkp@intel.com/reproduce)

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202508160857.yC3oMucJ-lkp@intel.com/

All errors (new ones prefixed by >>):

   ld: vmlinux.o: in function `analogix_dp_finish_probe':
>> drivers/gpu/drm/bridge/analogix/analogix_dp_core.c:1700: undefined reference to `devm_of_dp_aux_populate_bus'


vim +1700 drivers/gpu/drm/bridge/analogix/analogix_dp_core.c

  1695	
  1696	int analogix_dp_finish_probe(struct analogix_dp_device *dp)
  1697	{
  1698		int ret;
  1699	
> 1700		ret = devm_of_dp_aux_populate_bus(&dp->aux, analogix_dp_aux_done_probing);
  1701		if (ret) {
  1702			/*
  1703			 * If devm_of_dp_aux_populate_bus() returns -ENODEV, the done_probing() will
  1704			 * not be called because there are no EP devices. Then the callback function
  1705			 * analogix_dp_aux_done_probing() will be called directly in order to support
  1706			 * the other valid DT configurations.
  1707			 *
  1708			 * NOTE: The devm_of_dp_aux_populate_bus() is allowed to return -EPROBE_DEFER.
  1709			 */
  1710			if (ret != -ENODEV) {
  1711				dev_err(dp->dev, "failed to populate aux bus\n");
  1712				return ret;
  1713			}
  1714	
  1715			return analogix_dp_aux_done_probing(&dp->aux);
  1716		}
  1717	
  1718		return 0;
  1719	}
  1720	EXPORT_SYMBOL_GPL(analogix_dp_finish_probe);
  1721	

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