[PATCH 1/2] drm: Update MST First Link Slot Information Based on Encoding Format

[kernel test robot]

Hi Fangzhi,

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 drm-exynos/exynos-drm-next tegra-drm/drm/tegra/for-next linus/master v5.14-rc7 next-20210827]
[cannot apply to drm/drm-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/Fangzhi-Zuo/Update-128b-132b-MST-Slot-Information/20210828-082044
base:   git://anongit.freedesktop.org/drm-intel for-linux-next
config: parisc-randconfig-r002-20210827 (attached as .config)
compiler: hppa-linux-gcc (GCC) 11.2.0
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/0day-ci/linux/commit/8232240b519fadd6ad9eb814925e513a15407474
        git remote add linux-review https://github.com/0day-ci/linux
        git fetch --no-tags linux-review Fangzhi-Zuo/Update-128b-132b-MST-Slot-Information/20210828-082044
        git checkout 8232240b519fadd6ad9eb814925e513a15407474
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross ARCH=parisc 

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp at intel.com>

All warnings (new ones prefixed by >>):

>> drivers/gpu/drm/drm_dp_mst_topology.c:4512:6: warning: no previous prototype for 'drm_dp_mst_update_encoding_cap' [-Wmissing-prototypes]
    4512 | void drm_dp_mst_update_encoding_cap(struct drm_dp_mst_topology_mgr *mgr, uint8_t link_encoding_cap)
         |      ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~


vim +/drm_dp_mst_update_encoding_cap +4512 drivers/gpu/drm/drm_dp_mst_topology.c

  4511	
> 4512	void drm_dp_mst_update_encoding_cap(struct drm_dp_mst_topology_mgr *mgr, uint8_t link_encoding_cap)
  4513	{
  4514		if (link_encoding_cap == DP_CAP_ANSI_128B132B) {
  4515			mgr->total_avail_slots = 64;
  4516			mgr->start_slot = 0;
  4517		}
  4518		DRM_DEBUG_KMS("%s encoding format determined\n",
  4519			      (link_encoding_cap == DP_CAP_ANSI_128B132B) ? "128b/132b" : "8b/10b");
  4520	}
  4521	EXPORT_SYMBOL(drm_dp_mst_update_encoding_cap);
  4522	

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