Hi Kieran,

I love your patch! Yet something to improve:

[auto build test ERROR on v5.13-rc7]
[also build test ERROR on next-20210622]
[cannot apply to pinchartl-media/drm/du/next]
[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/Kieran-Bingham/drm-rcar-du-Sort-the-DU-outputs/20210623-082041
base:    13311e74253fe64329390df80bed3f07314ddd61
config: arm64-randconfig-r031-20210622 (attached as .config)
compiler: clang version 13.0.0 (https://github.com/llvm/llvm-project b259740801d3515810ecc15bf0c24b0d476a1608)
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
        # install arm64 cross compiling tool for clang build
        # apt-get install binutils-aarch64-linux-gnu
        # https://github.com/0day-ci/linux/commit/653b80d239ab6e6ee64817288adcaabf765b30cb
        git remote add linux-review https://github.com/0day-ci/linux
        git fetch --no-tags linux-review Kieran-Bingham/drm-rcar-du-Sort-the-DU-outputs/20210623-082041
        git checkout 653b80d239ab6e6ee64817288adcaabf765b30cb
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross 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 >>):

>> drivers/gpu/drm/rcar-du/rcar_du_crtc.c:34:10: fatal error: 'rcar_mipi_dsi.h' file not found
   #include "rcar_mipi_dsi.h"
            ^~~~~~~~~~~~~~~~~
   1 error generated.


vim +34 drivers/gpu/drm/rcar-du/rcar_du_crtc.c

    24	
    25	#include "rcar_cmm.h"
    26	#include "rcar_du_crtc.h"
    27	#include "rcar_du_drv.h"
    28	#include "rcar_du_encoder.h"
    29	#include "rcar_du_kms.h"
    30	#include "rcar_du_plane.h"
    31	#include "rcar_du_regs.h"
    32	#include "rcar_du_vsp.h"
    33	#include "rcar_lvds.h"
  > 34	#include "rcar_mipi_dsi.h"
    35	

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