Hi Jagan,

[FYI, it's a private test report for your RFC patch.]
[auto build test ERROR on drm-tip/drm-tip]
[cannot apply to drm-exynos/exynos-drm-next robh/for-next drm-intel/for-linux-next linus/master v5.13 next-20210701]
[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]

url:    https://github.com/0day-ci/linux/commits/Jagan-Teki/drm-bridge-Samsung-MIPI-DSIM-bridge/20210704-170731
base:   git://anongit.freedesktop.org/drm/drm-tip drm-tip
config: riscv-allmodconfig (attached as .config)
compiler: riscv64-linux-gcc (GCC) 9.3.0
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/0day-ci/linux/commit/ac6267c83b70acaa0da508f00708329b0ec8abcd
        git remote add linux-review https://github.com/0day-ci/linux
        git fetch --no-tags linux-review Jagan-Teki/drm-bridge-Samsung-MIPI-DSIM-bridge/20210704-170731
        git checkout ac6267c83b70acaa0da508f00708329b0ec8abcd
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=riscv 

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@intel.com>

All errors (new ones prefixed by >>, old ones prefixed by <<):

>> ERROR: modpost: "exynos_drm_crtc_get_by_type" [drivers/gpu/drm/bridge/samsung-dsim.ko] undefined!
>> ERROR: modpost: "exynos_drm_crtc_te_handler" [drivers/gpu/drm/bridge/samsung-dsim.ko] undefined!
>> ERROR: modpost: "exynos_drm_set_possible_crtcs" [drivers/gpu/drm/bridge/samsung-dsim.ko] undefined!

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all(a)lists.01.org