Hi Kuogee, Thank you for the patch! Perhaps something to improve: [auto build test WARNING on drm/drm-next] [also build test WARNING on drm-tip/drm-tip next-20220113] [cannot apply to drm-intel/for-linux-next drm-exynos/exynos-drm-next tegra-drm/drm/tegra/for-next airlied/drm-next v5.16] [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/group-dp-driver-rel... base: git://anongit.freedesktop.org/drm/drm drm-next config: csky-allmodconfig (https://download.01.org/0day-ci/archive/20220114/202201141446.nNPQPiCv-lk...) compiler: csky-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/fbd3a5f531a9b0ad814e36a17b3ba95a2... git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Kuogee-Hsieh/group-dp-driver-related-patches-into-one-series/20220114-075514 git checkout fbd3a5f531a9b0ad814e36a17b3ba95a20fe52a2 # 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=csky 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_irq_hpd_handle': 682 | int ret; | ^~~ vim +/ret +682 drivers/gpu/drm/msm/dp/dp_display.c 8ede2ecc3e5ee32 Kuogee Hsieh 2020-09-11 678 8ede2ecc3e5ee32 Kuogee Hsieh 2020-09-11 679 static int dp_irq_hpd_handle(struct dp_display_private *dp, u32 data) 8ede2ecc3e5ee32 Kuogee Hsieh 2020-09-11 680 { 8ede2ecc3e5ee32 Kuogee Hsieh 2020-09-11 681 u32 state; c58eb1b54feefc3 Kuogee Hsieh 2020-11-18 @682 int ret; 8ede2ecc3e5ee32 Kuogee Hsieh 2020-09-11 683 8ede2ecc3e5ee32 Kuogee Hsieh 2020-09-11 684 mutex_lock(&dp->event_mutex); 8ede2ecc3e5ee32 Kuogee Hsieh 2020-09-11 685 8ede2ecc3e5ee32 Kuogee Hsieh 2020-09-11 686 /* irq_hpd can happen at either connected or disconnected state */ 19e52bcb27c2ba1 Kuogee Hsieh 2020-11-03 687 state = dp->hpd_state; f21c8a276c2dadd Kuogee Hsieh 2021-05-21 688 if (state == ST_DISPLAY_OFF || state == ST_SUSPENDED) { 8ede2ecc3e5ee32 Kuogee Hsieh 2020-09-11 689 mutex_unlock(&dp->event_mutex); 8ede2ecc3e5ee32 Kuogee Hsieh 2020-09-11 690 return 0; 8ede2ecc3e5ee32 Kuogee Hsieh 2020-09-11 691 } 8ede2ecc3e5ee32 Kuogee Hsieh 2020-09-11 692 2b5f09cadfc5768 Kuogee Hsieh 2020-12-18 693 if (state == ST_CONNECT_PENDING) { 2b5f09cadfc5768 Kuogee Hsieh 2020-12-18 694 /* wait until ST_CONNECTED */ 2b5f09cadfc5768 Kuogee Hsieh 2020-12-18 695 dp_add_event(dp, EV_IRQ_HPD_INT, 0, 1); /* delay = 1 */ 2b5f09cadfc5768 Kuogee Hsieh 2020-12-18 696 mutex_unlock(&dp->event_mutex); 2b5f09cadfc5768 Kuogee Hsieh 2020-12-18 697 return 0; 2b5f09cadfc5768 Kuogee Hsieh 2020-12-18 698 } 2b5f09cadfc5768 Kuogee Hsieh 2020-12-18 699 ea9f337ce81e315 Kuogee Hsieh 2021-02-05 700 if (state == ST_CONNECT_PENDING || state == ST_DISCONNECT_PENDING) { 9fc418430c65848 Kuogee Hsieh 2021-01-13 701 /* wait until ST_CONNECTED */ 9fc418430c65848 Kuogee Hsieh 2021-01-13 702 dp_add_event(dp, EV_IRQ_HPD_INT, 0, 1); /* delay = 1 */ 9fc418430c65848 Kuogee Hsieh 2021-01-13 703 mutex_unlock(&dp->event_mutex); 9fc418430c65848 Kuogee Hsieh 2021-01-13 704 return 0; 9fc418430c65848 Kuogee Hsieh 2021-01-13 705 } 9fc418430c65848 Kuogee Hsieh 2021-01-13 706 f61550b3864b957 Kuogee Hsieh 2021-12-08 707 /* f61550b3864b957 Kuogee Hsieh 2021-12-08 708 * dp core (ahb/aux clks) must be initialized before f61550b3864b957 Kuogee Hsieh 2021-12-08 709 * irq_hpd be handled f61550b3864b957 Kuogee Hsieh 2021-12-08 710 */ fbd3a5f531a9b0a Kuogee Hsieh 2022-01-13 711 if (dp->core_initialized) c58eb1b54feefc3 Kuogee Hsieh 2020-11-18 712 ret = dp_display_usbpd_attention_cb(&dp->pdev->dev); fbd3a5f531a9b0a Kuogee Hsieh 2022-01-13 713 601f0479c583603 Maitreyee Rao 2021-07-26 714 DRM_DEBUG_DP("hpd_state=%d\n", state); 8ede2ecc3e5ee32 Kuogee Hsieh 2020-09-11 715 8ede2ecc3e5ee32 Kuogee Hsieh 2020-09-11 716 mutex_unlock(&dp->event_mutex); 8ede2ecc3e5ee32 Kuogee Hsieh 2020-09-11 717 8ede2ecc3e5ee32 Kuogee Hsieh 2020-09-11 718 return 0; c943b4948b5848f Chandan Uddaraju 2020-08-27 719 } c943b4948b5848f Chandan Uddaraju 2020-08-27 720 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org