Messages in this thread | | | From | Doug Anderson <> | Date | Fri, 26 Aug 2022 08:48:42 -0700 | Subject | Re: ld.lld: error: undefined symbol: drm_gem_fb_get_obj |
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Hi,
On Fri, Aug 26, 2022 at 1:26 AM Linus Walleij <linus.walleij@linaro.org> wrote: > > On Mon, Aug 22, 2022 at 9:27 AM kernel test robot <lkp@intel.com> wrote: > > > tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master > > head: 1c23f9e627a7b412978b4e852793c5e3c3efc555 > > commit: 57f6190a60ecc19f1ddddac0d7ea6524229271a9 drm/panel: ws2401: Add driver for WideChips WS2401 > > date: 1 year, 1 month ago > > config: x86_64-randconfig-a002-20220822 (https://download.01.org/0day-ci/archive/20220822/202208221506.0Lo051G4-lkp@intel.com/config) > > compiler: clang version 14.0.6 (https://github.com/llvm/llvm-project f28c006a5895fc0e329fe15fead81e37457cb1d1) > > 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://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=57f6190a60ecc19f1ddddac0d7ea6524229271a9 > > git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git > > git fetch --no-tags linus master > > git checkout 57f6190a60ecc19f1ddddac0d7ea6524229271a9 > > # 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=x86_64 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_gem_fb_get_obj > > >>> referenced by drm_mipi_dbi.c:203 (drivers/gpu/drm/drm_mipi_dbi.c:203) > > >>> gpu/drm/drm_mipi_dbi.o:(mipi_dbi_buf_copy) in archive drivers/built-in.a > > >>> referenced by drm_mipi_dbi.c:258 (drivers/gpu/drm/drm_mipi_dbi.c:258) > > >>> gpu/drm/drm_mipi_dbi.o:(mipi_dbi_fb_dirty) in archive drivers/built-in.a > > -- > > >> ld.lld: error: undefined symbol: drm_fb_swab > > >>> referenced by drm_mipi_dbi.c:219 (drivers/gpu/drm/drm_mipi_dbi.c:219) > > >>> gpu/drm/drm_mipi_dbi.o:(mipi_dbi_buf_copy) in archive drivers/built-in.a > > -- > > >> ld.lld: error: undefined symbol: drm_atomic_helper_connector_destroy_state > > >>> referenced by drm_mipi_dbi.c > > >>> gpu/drm/drm_mipi_dbi.o:(mipi_dbi_connector_funcs) in archive drivers/built-in.a > > -- > > >> ld.lld: error: undefined symbol: drm_gem_fb_create_with_dirty > > >>> referenced by drm_mipi_dbi.c > > >>> gpu/drm/drm_mipi_dbi.o:(mipi_dbi_mode_config_funcs) in archive drivers/built-in.a > > -- > > >> ld.lld: error: undefined symbol: drm_atomic_helper_check > > >>> referenced by drm_mipi_dbi.c > > >>> gpu/drm/drm_mipi_dbi.o:(mipi_dbi_mode_config_funcs) in archive drivers/built-in.a > > -- > > >> ld.lld: error: undefined symbol: drm_atomic_helper_commit > > >>> referenced by drm_mipi_dbi.c > > >>> gpu/drm/drm_mipi_dbi.o:(mipi_dbi_mode_config_funcs) in archive drivers/built-in.a > > -- > > >> ld.lld: error: undefined symbol: drm_fb_xrgb8888_to_rgb565 > > >>> referenced by drm_mipi_dbi.c:224 (drivers/gpu/drm/drm_mipi_dbi.c:224) > > >>> gpu/drm/drm_mipi_dbi.o:(mipi_dbi_buf_copy) in archive drivers/built-in.a > > -- > > >> ld.lld: error: undefined symbol: drm_fb_memcpy > > >>> referenced by drm_mipi_dbi.c:221 (drivers/gpu/drm/drm_mipi_dbi.c:221) > > >>> gpu/drm/drm_mipi_dbi.o:(mipi_dbi_buf_copy) in archive drivers/built-in.a > > -- > > >> ld.lld: error: undefined symbol: drm_atomic_helper_damage_merged > > >>> referenced by drm_mipi_dbi.c:318 (drivers/gpu/drm/drm_mipi_dbi.c:318) > > >>> gpu/drm/drm_mipi_dbi.o:(mipi_dbi_pipe_update) in archive drivers/built-in.a > > -- > > >> ld.lld: error: undefined symbol: drm_simple_display_pipe_init > > >>> referenced by drm_mipi_dbi.c:529 (drivers/gpu/drm/drm_mipi_dbi.c:529) > > >>> gpu/drm/drm_mipi_dbi.o:(mipi_dbi_dev_init_with_formats) in archive drivers/built-in.a > > -- > > >> ld.lld: error: undefined symbol: drm_atomic_helper_connector_reset > > >>> referenced by drm_mipi_dbi.c > > >>> gpu/drm/drm_mipi_dbi.o:(mipi_dbi_connector_funcs) in archive drivers/built-in.a > > I don't understand this error report, please robot, analyze further and come > back with details on what needs to be fixed.
I've never been accused of being a robot (OK, well, there was that one time...), but I can probably still help a little...
I followed the "steps to reproduce" from the report and got the failure. Basically the problem is this:
$ grep DRM_MIPI_DBI build_dir/.config CONFIG_DRM_MIPI_DBI=y
$ grep DRM_KMS_HELPER build_dir/.config CONFIG_DRM_KMS_HELPER=m
...so you're the MIPI DBI code is builtin and calling into the KMS helper which is a module. That's does not compute. <ERR>. <ERR>. <SHUTTING DOWN>.
Unfortunately, fixing the error isn't the most trivial thing in the world. If you just do this:
config DRM_MIPI_DBI tristate + select DRM_KMS_HELPER depends on DRM
...then you get a circular dependency:
drivers/gpu/drm/Kconfig:76:error: recursive dependency detected! drivers/gpu/drm/Kconfig:76: symbol DRM_KMS_HELPER is selected by DRM_MIPI_DBI drivers/gpu/drm/Kconfig:31: symbol DRM_MIPI_DBI is selected by DRM_PANEL_ILITEK_ILI9341 drivers/gpu/drm/panel/Kconfig:165: symbol DRM_PANEL_ILITEK_ILI9341 depends on DRM_KMS_HELPER For a resolution refer to Documentation/kbuild/kconfig-language.rst subsection "Kconfig recursive dependency limitations"
...and if you do this:
config DRM_MIPI_DBI tristate depends on DRM + depends on DRM_KMS_HELPER
...then you get errors like this:
WARNING: unmet direct dependencies detected for DRM_MIPI_DBI Depends on [m]: HAS_IOMEM [=y] && DRM [=y] && DRM_KMS_HELPER [=m] Selected by [y]: - DRM_PANEL_WIDECHIPS_WS2401 [=y] && HAS_IOMEM [=y] && DRM [=y] && DRM_PANEL [=y] && SPI [=y] && GPIOLIB [=y] && BACKLIGHT_CLASS_DEVICE [=y] Selected by [m]: - TINYDRM_ILI9225 [=m] && HAS_IOMEM [=y] && DRM [=y] && SPI [=y] - TINYDRM_ILI9486 [=m] && HAS_IOMEM [=y] && DRM [=y] && SPI [=y] - TINYDRM_ST7586 [=m] && HAS_IOMEM [=y] && DRM [=y] && SPI [=y] - TINYDRM_ST7735R [=m] && HAS_IOMEM [=y] && DRM [=y] && SPI [=y]
Hopefully that at least explains the problem even if it doesn't magically give a solution. ;-)
-Doug
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