Hi Sandor,

FYI, the error/warning still remains.

tree:   https://github.com/Freescale/linux-fslc pr/316
head:   68003439250c6199cbbc4262bd98dc5dd4a074d8
commit: 110d5c01d3f73ef56cd4ff4eba74a45b6f2dfc63 [12053/18270] MLK-24427-3: drm: mhdp: Backporting code change from linux-nxp
config: arm64-allyesconfig (attached as .config)
compiler: aarch64-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/Freescale/linux-fslc/commit/110d5c01d3f73ef56cd4ff4eba74a45b6f2dfc63
        git remote add freescale-fslc https://github.com/Freescale/linux-fslc
        git fetch --no-tags freescale-fslc pr/316
        git checkout 110d5c01d3f73ef56cd4ff4eba74a45b6f2dfc63
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross W=1 ARCH=arm64 

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 >>):

   In file included from drivers/gpu/drm/rockchip/cdn-dp-core.c:24:
>> drivers/gpu/drm/rockchip/cdn-dp-core.h:10:10: fatal error: drm/bridge/cdns-mhdp-common.h: No such file or directory
      10 | #include <drm/bridge/cdns-mhdp-common.h>
         |          ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   compilation terminated.


vim +10 drivers/gpu/drm/rockchip/cdn-dp-core.h

1a0f7ed3abe29c Chris Zhong   2017-02-05   9  
7a3d6a6e256cf5 Sandor Yu     2019-07-10 @10  #include <drm/bridge/cdns-mhdp-common.h>
7a3d6a6e256cf5 Sandor Yu     2019-07-10  11  #include <drm/drmP.h>
1a0f7ed3abe29c Chris Zhong   2017-02-05  12  #include <drm/drm_dp_helper.h>
1a0f7ed3abe29c Chris Zhong   2017-02-05  13  #include <drm/drm_panel.h>
fcd70cd36b9bf6 Daniel Vetter 2019-01-17  14  #include <drm/drm_probe_helper.h>
c2156ccd9657c9 Sam Ravnborg  2019-07-16  15  

:::::: The code at line 10 was first introduced by commit
:::::: 7a3d6a6e256cf5f35a9910c68432e3ba5b491116 drm: bridge: add Cadence MHDP HDMI/DP API

:::::: TO: Sandor Yu <Sandor.yu@nxp.com>
:::::: CC: Dong Aisheng <aisheng.dong@nxp.com>

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