Hi Tian,

[FYI, it's a private test report for your RFC patch.]
[auto build test WARNING on linus/master]
[also build test WARNING on v5.11-rc2 next-20210108]
[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/Tian-Tao/drm-connector-Set-the-default-callback-function-for-drm_connector_funcs/20210108-165753
base:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git f5e6c330254ae691f6d7befe61c786eb5056007e
config: powerpc64-randconfig-r004-20210108 (attached as .config)
compiler: powerpc64-linux-gcc (GCC) 9.3.0
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/37e7ae0ccb8825f7718028991d1635d60323f9dc
        git remote add linux-review https://github.com/0day-ci/linux
        git fetch --no-tags linux-review Tian-Tao/drm-connector-Set-the-default-callback-function-for-drm_connector_funcs/20210108-165753
        git checkout 37e7ae0ccb8825f7718028991d1635d60323f9dc
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=powerpc64 

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/aspeed/aspeed_gfx_out.c: In function 'aspeed_gfx_create_output':
>> drivers/gpu/drm/aspeed/aspeed_gfx_out.c:39:6: warning: passing argument 3 of 'drm_connector_init' discards 'const' qualifier from pointer target type [-Wdiscarded-qualifiers]
      39 |      &aspeed_gfx_connector_funcs,
         |      ^~~~~~~~~~~~~~~~~~~~~~~~~~~
   In file included from include/drm/drm_modes.h:33,
                    from include/drm/drm_crtc.h:40,
                    from include/drm/drm_atomic_helper.h:31,
                    from drivers/gpu/drm/aspeed/aspeed_gfx_out.c:4:
   include/drm/drm_connector.h:1515:38: note: expected 'struct drm_connector_funcs *' but argument is of type 'const struct drm_connector_funcs *'
    1515 |          struct drm_connector_funcs *funcs,
         |          ~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~
--
   drivers/gpu/drm/xlnx/zynqmp_dp.c: In function 'zynqmp_dp_drm_init':
>> drivers/gpu/drm/xlnx/zynqmp_dp.c:1623:6: warning: passing argument 3 of 'drm_connector_init' discards 'const' qualifier from pointer target type [-Wdiscarded-qualifiers]
    1623 |      &zynqmp_dp_connector_funcs,
         |      ^~~~~~~~~~~~~~~~~~~~~~~~~~
   In file included from include/drm/drm_modes.h:33,
                    from include/drm/drm_crtc.h:40,
                    from include/drm/drm_atomic_helper.h:31,
                    from drivers/gpu/drm/xlnx/zynqmp_dp.c:12:
   include/drm/drm_connector.h:1515:38: note: expected 'struct drm_connector_funcs *' but argument is of type 'const struct drm_connector_funcs *'
    1515 |          struct drm_connector_funcs *funcs,
         |          ~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~


vim +39 drivers/gpu/drm/aspeed/aspeed_gfx_out.c

4f2a8f5898ecd80 Joel Stanley  2019-04-03  28  
4f2a8f5898ecd80 Joel Stanley  2019-04-03  29  int aspeed_gfx_create_output(struct drm_device *drm)
4f2a8f5898ecd80 Joel Stanley  2019-04-03  30  {
cd8294540776f79 Daniel Vetter 2020-04-15  31  	struct aspeed_gfx *priv = to_aspeed_gfx(drm);
4f2a8f5898ecd80 Joel Stanley  2019-04-03  32  	int ret;
4f2a8f5898ecd80 Joel Stanley  2019-04-03  33  
4f2a8f5898ecd80 Joel Stanley  2019-04-03  34  	priv->connector.dpms = DRM_MODE_DPMS_OFF;
4f2a8f5898ecd80 Joel Stanley  2019-04-03  35  	priv->connector.polled = 0;
4f2a8f5898ecd80 Joel Stanley  2019-04-03  36  	drm_connector_helper_add(&priv->connector,
4f2a8f5898ecd80 Joel Stanley  2019-04-03  37  				 &aspeed_gfx_connector_helper_funcs);
4f2a8f5898ecd80 Joel Stanley  2019-04-03  38  	ret = drm_connector_init(drm, &priv->connector,
4f2a8f5898ecd80 Joel Stanley  2019-04-03 @39  				 &aspeed_gfx_connector_funcs,

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