[PATCH v2 08/10] HID: i2c-hid: Support being a panel follower

[Doug Anderson]

Hi,

On Thu, Jun 8, 2023 at 12:15 AM kernel test robot <lkp at intel.com> wrote:
>
> Hi Douglas,
>
> kernel test robot noticed the following build errors:
>
> [auto build test ERROR on robh/for-next]
> [also build test ERROR on hid/for-next dtor-input/next dtor-input/for-linus drm-misc/drm-misc-next linus/master v6.4-rc5 next-20230607]
> [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/Douglas-Anderson/dt-bindings-HID-i2c-hid-Add-panel-property-to-i2c-hid-backed-touchscreens/20230608-055515
> base:   https://git.kernel.org/pub/scm/linux/kernel/git/robh/linux.git for-next
> patch link:    https://lore.kernel.org/r/20230607144931.v2.8.Ib1a98309c455cd7e26b931c69993d4fba33bbe15%40changeid
> patch subject: [PATCH v2 08/10] HID: i2c-hid: Support being a panel follower
> config: i386-randconfig-i003-20230607 (https://download.01.org/0day-ci/archive/20230608/202306081419.Dzz0T4iW-lkp@intel.com/config)
> compiler: clang version 15.0.7 (https://github.com/llvm/llvm-project.git 8dfdcc7b7bf66834a761bd8de445840ef68e4d1a)
> reproduce (this is a W=1 build):
>         mkdir -p ~/bin
>         wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
>         chmod +x ~/bin/make.cross
>         git remote add robh https://git.kernel.org/pub/scm/linux/kernel/git/robh/linux.git
>         git fetch robh for-next
>         git checkout robh/for-next
>         b4 shazam https://lore.kernel.org/r/20230607144931.v2.8.Ib1a98309c455cd7e26b931c69993d4fba33bbe15@changeid
>         # save the config file
>         mkdir build_dir && cp config build_dir/.config
>         COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang ~/bin/make.cross W=1 O=build_dir ARCH=i386 olddefconfig
>         COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang ~/bin/make.cross W=1 O=build_dir ARCH=i386 SHELL=/bin/bash
>
> 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 at intel.com>
> | Closes: https://lore.kernel.org/oe-kbuild-all/202306081419.Dzz0T4iW-lkp@intel.com/
>
> All errors (new ones prefixed by >>):
>
> >> ld.lld: error: undefined symbol: drm_panel_add_follower
>    >>> referenced by i2c-hid-core.c:1159 (drivers/hid/i2c-hid/i2c-hid-core.c:1159)
>    >>>               drivers/hid/i2c-hid/i2c-hid-core.o:(i2c_hid_core_probe) in archive vmlinux.a
> --
> >> ld.lld: error: undefined symbol: drm_panel_remove_follower
>    >>> referenced by i2c-hid-core.c:1218 (drivers/hid/i2c-hid/i2c-hid-core.c:1218)
>    >>>               drivers/hid/i2c-hid/i2c-hid-core.o:(i2c_hid_core_remove) in archive vmlinux.a

Thanks for the report! Ugh, I guess I forgot that even though
DRM_PANEL is bool, it gets bundled up into all of DRM which can be a
module. Assuming that this series looks mostly the same in the next
version, I'll plan to add this:

depends on DRM || !DRM # if DRM=m, this can't be 'y'

...to each of the i2c-hid subclasses.

-Doug