Hi Xin,

Thank you for the patch! Perhaps something to improve:

[auto build test WARNING on drm-intel/for-linux-next]
[also build test WARNING on drm-tip/drm-tip linus/master v5.11-rc1 next-20201223]
[cannot apply to robh/for-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/Xin-Ji/Add-MIPI-rx-DPI-support/20201225-190825
base:   git://anongit.freedesktop.org/drm-intel for-linux-next
config: arm64-randconfig-r026-20201230 (attached as .config)
compiler: clang version 12.0.0 (https://github.com/llvm/llvm-project 3c0d36f977d9e012b245c796ddc8596ac3af659b)
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/eb80dca31ef0506d1afd6590d453768456f2d646
        git remote add linux-review https://github.com/0day-ci/linux
        git fetch --no-tags linux-review Xin-Ji/Add-MIPI-rx-DPI-support/20201225-190825
        git checkout eb80dca31ef0506d1afd6590d453768456f2d646
        # 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 warnings (new ones prefixed by >>):

>> drivers/gpu/drm/bridge/analogix/anx7625.c:935:6: warning: no previous prototype for function 'hdcp_enable' [-Wmissing-prototypes]
   void hdcp_enable(struct anx7625_data *ctx, int en)
        ^
   drivers/gpu/drm/bridge/analogix/anx7625.c:935:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
   void hdcp_enable(struct anx7625_data *ctx, int en)
   ^
   static 
   1 warning generated.


vim +/hdcp_enable +935 drivers/gpu/drm/bridge/analogix/anx7625.c

   934	
 > 935	void hdcp_enable(struct anx7625_data *ctx, int en)
   936	{
   937		struct device *dev = &ctx->client->dev;
   938	
   939		DRM_DEV_DEBUG_DRIVER(dev, "en(%d)\n", en);
   940	
   941		ctx->hdcp_en = !!en;
   942	}
   943	

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