Hi Nicolas, Thank you for the patch! Yet something to improve: [auto build test ERROR on next-20210420] [cannot apply to robh/for-next linux/master linus/master v5.12-rc8 v5.12-rc7 v5.12-rc6 v5.12-rc8] [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/Nicolas-Boichat/drm-panfrost-Add... base: 593ef1658ecf61d3619885bdbbcfffa3d1417891 config: powerpc-randconfig-m031-20210421 (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/0b928d8134d2744f01ed4b1ba3fd5c045... git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Nicolas-Boichat/drm-panfrost-Add-support-for-mt8183-GPU/20210421-095604 git checkout 0b928d8134d2744f01ed4b1ba3fd5c0457d56a1c # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross W=1 ARCH=powerpc If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All errors (new ones prefixed by >>): drivers/gpu/drm/panfrost/panfrost_devfreq.c: In function 'panfrost_devfreq_init': 104 | opp_table = dev_pm_opp_set_regulators(dev, pfdev->comp->supply_names, | ^~~~~~~~~ drivers/gpu/drm/panfrost/panfrost_devfreq.c:104:2: note: each undeclared identifier is reported only once for each function it appears in vim +/opp_table +104 drivers/gpu/drm/panfrost/panfrost_devfreq.c 84 85 int panfrost_devfreq_init(struct panfrost_device *pfdev) 86 { 87 int ret; 88 struct dev_pm_opp *opp; 89 unsigned long cur_freq; 90 struct device *dev = &pfdev->pdev->dev; 91 struct devfreq *devfreq; 92 struct thermal_cooling_device *cooling; 93 struct panfrost_devfreq *pfdevfreq = &pfdev->pfdevfreq; 94 95 if (pfdev->comp->num_supplies > 1) { 96 /* 97 * GPUs with more than 1 supply require platform-specific handling: 98 * continue without devfreq 99 */ 100 DRM_DEV_INFO(dev, "More than 1 supply is not supported yet\n"); 101 return 0; 102 } 103 105 pfdev->comp->num_supplies); 106 if (IS_ERR(opp_table)) { 107 ret = PTR_ERR(opp_table); 108 /* Continue if the optional regulator is missing */ 109 if (ret != -ENODEV) { 110 DRM_DEV_ERROR(dev, "Couldn't set OPP regulators\n"); 111 return ret; 112 } 113 } 114 115 ret = devm_pm_opp_of_add_table(dev); 116 if (ret) { 117 /* Optional, continue without devfreq */ 118 if (ret == -ENODEV) 119 ret = 0; 120 return ret; 121 } 122 pfdevfreq->opp_of_table_added = true; 123 124 spin_lock_init(&pfdevfreq->lock); 125 126 panfrost_devfreq_reset(pfdevfreq); 127 128 cur_freq = clk_get_rate(pfdev->clock); 129 130 opp = devfreq_recommended_opp(dev, &cur_freq, 0); 131 if (IS_ERR(opp)) 132 return PTR_ERR(opp); 133 134 panfrost_devfreq_profile.initial_freq = cur_freq; 135 dev_pm_opp_put(opp); 136 137 /* 138 * Setup default thresholds for the simple_ondemand governor. 139 * The values are chosen based on experiments. 140 */ 141 pfdevfreq->gov_data.upthreshold = 45; 142 pfdevfreq->gov_data.downdifferential = 5; 143 144 devfreq = devm_devfreq_add_device(dev, &panfrost_devfreq_profile, 145 DEVFREQ_GOV_SIMPLE_ONDEMAND, 146 &pfdevfreq->gov_data); 147 if (IS_ERR(devfreq)) { 148 DRM_DEV_ERROR(dev, "Couldn't initialize GPU devfreq\n"); 149 return PTR_ERR(devfreq); 150 } 151 pfdevfreq->devfreq = devfreq; 152 153 cooling = devfreq_cooling_em_register(devfreq, NULL); 154 if (IS_ERR(cooling)) 155 DRM_DEV_INFO(dev, "Failed to register cooling device\n"); 156 else 157 pfdevfreq->cooling = cooling; 158 159 return 0; 160 } 161 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org