Hi Kuogee, Thank you for the patch! Perhaps something to improve: [auto build test WARNING on next-20211207] [cannot apply to drm/drm-next v5.16-rc4 v5.16-rc3 v5.16-rc2 v5.16-rc4] [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/Kuogee-Hsieh/drm-msm-dp-do-not-i... base: 04fe99a8d936d46a310ca61b8b63dc270962bf01 config: nios2-allyesconfig (https://download.01.org/0day-ci/archive/20211208/202112080809.Oa6u8ZGP-lk...) compiler: nios2-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/3ff2f485db11cec5017de869d3c78c37f... git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Kuogee-Hsieh/drm-msm-dp-do-not-initialize-phy-until-plugin-interrupt-received/20211208-024106 git checkout 3ff2f485db11cec5017de869d3c78c37f25215a4 # save the config file to linux build tree mkdir build_dir COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross O=build_dir ARCH=nios2 SHELL=/bin/bash drivers/gpu/drm/msm/ 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_display.c: In function 'dp_display_host_init': 403 | bool flip = false; | ^~~~ vim +/flip +403 drivers/gpu/drm/msm/dp/dp_display.c 3ff2f485db11ce Kuogee Hsieh 2021-12-07 400 3ff2f485db11ce Kuogee Hsieh 2021-12-07 401 static void dp_display_host_init(struct dp_display_private *dp) c943b4948b5848 Chandan Uddaraju 2020-08-27 402 { c943b4948b5848 Chandan Uddaraju 2020-08-27 @403 bool flip = false; c943b4948b5848 Chandan Uddaraju 2020-08-27 404 601f0479c58360 Maitreyee Rao 2021-07-26 405 DRM_DEBUG_DP("core_initialized=%d\n", dp->core_initialized); c943b4948b5848 Chandan Uddaraju 2020-08-27 406 if (dp->core_initialized) { c943b4948b5848 Chandan Uddaraju 2020-08-27 407 DRM_DEBUG_DP("DP core already initialized\n"); c943b4948b5848 Chandan Uddaraju 2020-08-27 408 return; c943b4948b5848 Chandan Uddaraju 2020-08-27 409 } c943b4948b5848 Chandan Uddaraju 2020-08-27 410 c943b4948b5848 Chandan Uddaraju 2020-08-27 411 if (dp->usbpd->orientation == ORIENTATION_CC2) c943b4948b5848 Chandan Uddaraju 2020-08-27 412 flip = true; c943b4948b5848 Chandan Uddaraju 2020-08-27 413 3ff2f485db11ce Kuogee Hsieh 2021-12-07 414 dp_power_init(dp->power, false); 3ff2f485db11ce Kuogee Hsieh 2021-12-07 415 dp_ctrl_irq_enable(dp->ctrl); 3ff2f485db11ce Kuogee Hsieh 2021-12-07 416 3ff2f485db11ce Kuogee Hsieh 2021-12-07 417 /* 3ff2f485db11ce Kuogee Hsieh 2021-12-07 418 * eDP is the embedded primary display and has its own phy 3ff2f485db11ce Kuogee Hsieh 2021-12-07 419 * initialize phy immediately 3ff2f485db11ce Kuogee Hsieh 2021-12-07 420 */ 3ff2f485db11ce Kuogee Hsieh 2021-12-07 421 if (dp->dp_display.connector_type == DRM_MODE_CONNECTOR_eDP) 3ff2f485db11ce Kuogee Hsieh 2021-12-07 422 dp_display_host_phy_init(dp); 3ff2f485db11ce Kuogee Hsieh 2021-12-07 423 c943b4948b5848 Chandan Uddaraju 2020-08-27 424 dp_aux_init(dp->aux); c943b4948b5848 Chandan Uddaraju 2020-08-27 425 dp->core_initialized = true; c943b4948b5848 Chandan Uddaraju 2020-08-27 426 } c943b4948b5848 Chandan Uddaraju 2020-08-27 427 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org