[radeon-alex:amd-staging-drm-next 153/840] drivers/gpu/drm/amd/amdgpu/../display/include/dpcd_defs.h:29:27: fatal error: drm_dp_helper.h: No such file or directory

[kbuild test robot]

tree:   git://people.freedesktop.org/~agd5f/linux.git amd-staging-drm-next
head:   990b8d69489cc8ba7e119af536808e5ca41d3864
commit: a5c3e065aefce54e10552725481f795980625a66 [153/840] drm/amd/display: port to using drm dpcd defines
config: s390-allyesconfig (attached as .config)
compiler: s390x-linux-gnu-gcc (Debian 6.1.1-9) 6.1.1 20160705
reproduce:
        wget https://raw.githubusercontent.com/01org/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        git checkout a5c3e065aefce54e10552725481f795980625a66
        # save the attached .config to linux build tree
        make.cross ARCH=s390 

Note: the radeon-alex/amd-staging-drm-next HEAD 990b8d69489cc8ba7e119af536808e5ca41d3864 builds fine.
      It only hurts bisectibility.

All errors (new ones prefixed by >>):

   In file included from drivers/gpu/drm/amd/amdgpu/../display/dc/core/dc_link.c:42:0:
>> drivers/gpu/drm/amd/amdgpu/../display/include/dpcd_defs.h:29:27: fatal error: drm_dp_helper.h: No such file or directory
    #include "drm_dp_helper.h"
                              ^
   compilation terminated.

vim +29 drivers/gpu/drm/amd/amdgpu/../display/include/dpcd_defs.h

    28	
  > 29	#include "drm_dp_helper.h"
    30	

---
0-DAY kernel test infrastructure                Open Source Technology Center
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