RE: [linux-next:master 5636/9540] ld.lld: error: undefined symbol: drm_of_get_data_lanes_count_ep

[Biju Das <biju.das.jz@bp.renesas.com>]

Hi kernel test robot,

> Subject: [linux-next:master 5636/9540] ld.lld: error: undefined symbol:
> drm_of_get_data_lanes_count_ep
> 
> tree:
> 
> head:   771a207d1ee9f38da8c0cee1412228f18b900bac
> commit: 7a043f978ed1433bddb088a732e9bb91501ebd76 [5636/9540] drm: rcar-
> du: Add RZ/G2L DSI driver
> config: arm64-randconfig-r026-20221122
> compiler: clang version 16.0.0
> reproduce (this is a W=1 build):
>         wget
-O ~/bin/make.cross
>         chmod +x ~/bin/make.cross
>         # install arm64 cross compiling tool for clang build
>         # apt-get install binutils-aarch64-linux-gnu
>         #
>         git remote add linux-next
>         git fetch --no-tags linux-next master
>         git checkout 7a043f978ed1433bddb088a732e9bb91501ebd76
>         # save the config file
>         mkdir build_dir && cp config build_dir/.config
>         COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1
> O=build_dir ARCH=arm64 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 >>):
> 
> >> ld.lld: error: undefined symbol: drm_of_get_data_lanes_count_ep
>    >>> referenced by rzg2l_mipi_dsi.c
>    >>>               drivers/gpu/drm/rcar-
> du/rzg2l_mipi_dsi.o:(rzg2l_mipi_dsi_probe) in archive vmlinux.a
> --
> >> ld.lld: error: undefined symbol: drm_bridge_attach
>    >>> referenced by rzg2l_mipi_dsi.c
>    >>>               drivers/gpu/drm/rcar-
> du/rzg2l_mipi_dsi.o:(rzg2l_mipi_dsi_attach) in archive vmlinux.a
> --
> >> ld.lld: error: undefined symbol:
> drm_atomic_get_new_connector_for_encoder
>    >>> referenced by rzg2l_mipi_dsi.c
>    >>>               drivers/gpu/drm/rcar-
> du/rzg2l_mipi_dsi.o:(rzg2l_mipi_dsi_atomic_enable) in archive vmlinux.a
> --
> >> ld.lld: error: undefined symbol: devm_drm_of_get_bridge
>    >>> referenced by rzg2l_mipi_dsi.c
>    >>>               drivers/gpu/drm/rcar-
> du/rzg2l_mipi_dsi.o:(rzg2l_mipi_dsi_host_attach) in archive vmlinux.a
> --
> >> ld.lld: error: undefined symbol: drm_bridge_add
>    >>> referenced by rzg2l_mipi_dsi.c
>    >>>               drivers/gpu/drm/rcar-
> du/rzg2l_mipi_dsi.o:(rzg2l_mipi_dsi_host_attach) in archive vmlinux.a
> --
> >> ld.lld: error: undefined symbol: drm_bridge_remove
>    >>> referenced by rzg2l_mipi_dsi.c
>    >>>               drivers/gpu/drm/rcar-
> du/rzg2l_mipi_dsi.o:(rzg2l_mipi_dsi_host_detach) in archive vmlinux.a
> --
> >> ld.lld: error: undefined symbol:
> drm_atomic_helper_bridge_duplicate_state
>    >>> referenced by rzg2l_mipi_dsi.c
>    >>>               drivers/gpu/drm/rcar-
> du/rzg2l_mipi_dsi.o:(rzg2l_mipi_dsi_bridge_ops) in archive vmlinux.a
> --
> >> ld.lld: error: undefined symbol:
> drm_atomic_helper_bridge_destroy_state
>    >>> referenced by rzg2l_mipi_dsi.c
>    >>>               drivers/gpu/drm/rcar-
> du/rzg2l_mipi_dsi.o:(rzg2l_mipi_dsi_bridge_ops) in archive vmlinux.a
> --
> >> ld.lld: error: undefined symbol: drm_atomic_helper_bridge_reset
>    >>> referenced by rzg2l_mipi_dsi.c
>    >>>               drivers/gpu/drm/rcar-
> du/rzg2l_mipi_dsi.o:(rzg2l_mipi_dsi_bridge_ops) in archive vmlinux.a

I was able to reproduce the issue and the same fix[1], will fix the issue
here for clang compiler as well. Can you please apply [1] to avoid
repeatedly sending the same issue for different compilers on the kernel test robot?

[1] https://lore.kernel.org/linux-renesas-soc/Y3wVLU01mHp2zozI@pendragon.ideasonboard.com/T/#t

Cheers,
Biju