Hi Jitao,

Thank you for the patch! Yet something to improve:

[auto build test ERROR on robh/for-next]
[also build test ERROR on pza/reset/next linux/master linus/master v5.11-rc7 next-20210125]
[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/Jitao-Shi/Add-check-for-max-clock-rate-in-mode_valid/20210208-094340
base:   https://git.kernel.org/pub/scm/linux/kernel/git/robh/linux.git for-next
config: arm64-randconfig-r023-20210209 (attached as .config)
compiler: clang version 12.0.0 (https://github.com/llvm/llvm-project c9439ca36342fb6013187d0a69aef92736951476)
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/7036ee290c5a384eeaa0b45d739a8b024235671d
        git remote add linux-review https://github.com/0day-ci/linux
        git fetch --no-tags linux-review Jitao-Shi/Add-check-for-max-clock-rate-in-mode_valid/20210208-094340
        git checkout 7036ee290c5a384eeaa0b45d739a8b024235671d
        # 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 <redacted>

All errors (new ones prefixed by >>):

quoted

drivers/gpu/drm/mediatek/mtk_dpi.c:574:16: error: incompatible function pointer types initializing 'enum drm_mode_status (*)(struct drm_bridge *, const struct drm_display_info *, const struct drm_display_mode *)' with an expression of type 'enum drm_mode_status (struct drm_bridge *, const struct drm_display_mode *)' [-Werror,-Wincompatible-function-pointer-types]

           .mode_valid = mtk_dpi_bridge_mode_valid,
                         ^~~~~~~~~~~~~~~~~~~~~~~~~
   1 error generated.


vim +574 drivers/gpu/drm/mediatek/mtk_dpi.c

   570	
   571	static const struct drm_bridge_funcs mtk_dpi_bridge_funcs = {
   572		.attach = mtk_dpi_bridge_attach,
   573		.mode_set = mtk_dpi_bridge_mode_set,
 > 574		.mode_valid = mtk_dpi_bridge_mode_valid,
   575		.disable = mtk_dpi_bridge_disable,
   576		.enable = mtk_dpi_bridge_enable,
   577	};
   578	

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