tree: https://gitlab.freedesktop.org/drm/msm.git msm-next-dp head: 15562c2537a3dcedcf92fb942d7fec853ab0428a commit: 8d58c622f51c1f03c4b48483704ca5fbc7d670a6 [49/50] drm/msm/dp: remove mode hard-coding in case of DP CTS config: arm-defconfig (attached as .config) compiler: arm-linux-gnueabi-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 git checkout 8d58c622f51c1f03c4b48483704ca5fbc7d670a6 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=arm If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All warnings (new ones prefixed by >>): drivers/gpu/drm/msm/dp/dp_panel.c: In function 'dp_panel_get_modes': 248 | struct dp_panel_private *panel; | ^~~~~ git remote add drm-msm https://gitlab.freedesktop.org/drm/msm.git git fetch --no-tags drm-msm msm-next-dp git checkout 8d58c622f51c1f03c4b48483704ca5fbc7d670a6 vim +/panel +248 drivers/gpu/drm/msm/dp/dp_panel.c 15f1a5a04a1551 Chandan Uddaraju 2020-08-27 244 15f1a5a04a1551 Chandan Uddaraju 2020-08-27 245 int dp_panel_get_modes(struct dp_panel *dp_panel, 15f1a5a04a1551 Chandan Uddaraju 2020-08-27 246 struct drm_connector *connector, struct dp_display_mode *mode) 15f1a5a04a1551 Chandan Uddaraju 2020-08-27 247 { 15f1a5a04a1551 Chandan Uddaraju 2020-08-27 @248 struct dp_panel_private *panel; 15f1a5a04a1551 Chandan Uddaraju 2020-08-27 249 15f1a5a04a1551 Chandan Uddaraju 2020-08-27 250 if (!dp_panel) { 15f1a5a04a1551 Chandan Uddaraju 2020-08-27 251 DRM_ERROR("invalid input\n"); 15f1a5a04a1551 Chandan Uddaraju 2020-08-27 252 return -EINVAL; 15f1a5a04a1551 Chandan Uddaraju 2020-08-27 253 } 15f1a5a04a1551 Chandan Uddaraju 2020-08-27 254 15f1a5a04a1551 Chandan Uddaraju 2020-08-27 255 panel = container_of(dp_panel, struct dp_panel_private, dp_panel); 15f1a5a04a1551 Chandan Uddaraju 2020-08-27 256 8d58c622f51c1f Abhinav Kumar 2020-09-12 257 if (dp_panel->edid) 15f1a5a04a1551 Chandan Uddaraju 2020-08-27 258 return dp_panel_update_modes(connector, dp_panel->edid); 15f1a5a04a1551 Chandan Uddaraju 2020-08-27 259 15f1a5a04a1551 Chandan Uddaraju 2020-08-27 260 return 0; 15f1a5a04a1551 Chandan Uddaraju 2020-08-27 261 } 15f1a5a04a1551 Chandan Uddaraju 2020-08-27 262 :::::: The code at line 248 was first introduced by commit :::::: 15f1a5a04a1551f9801569e81ddbef412252652f drm/msm/dp: add displayPort driver support :::::: TO: Chandan Uddaraju <chandanu(a)codeaurora.org&gt; :::::: CC: Rob Clark <robdclark(a)chromium.org&gt; --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org