tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master head: c5d714aa6dce262482992cccc0ab01383294f7ac commit: 167dac97eb46c7b8a15b2195080e191bb0c9ce35 drm/msm/dp: Modify prototype of encoder based API date: 4 months ago config: arm-randconfig-r006-20220213 (https://download.01.org/0day-ci/archive/20220214/202202140432.v7pvcbKc-lk...) compiler: clang version 15.0.0 (https://github.com/llvm/llvm-project 478c237e21b2c3a83e46f26fcbeb3876682f9b14) 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 # install arm cross compiling tool for clang build # apt-get install binutils-arm-linux-gnueabi # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit... git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git git fetch --no-tags linus master git checkout 167dac97eb46c7b8a15b2195080e191bb0c9ce35 # save the config file to linux build tree mkdir build_dir COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=arm 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 errors (new ones prefixed by >>): struct msm_drm_private *priv; ^ drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c:1197:26: error: variable 'priv' set but not used [-Werror,-Wunused-but-set-variable] struct msm_drm_private *priv; ^ 2 errors generated. vim +/priv +1148 drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c 25fdd5933e4c0f Jeykumar Sankaran 2018-06-27 1143 25fdd5933e4c0f Jeykumar Sankaran 2018-06-27 1144 static void dpu_encoder_virt_enable(struct drm_encoder *drm_enc) 25fdd5933e4c0f Jeykumar Sankaran 2018-06-27 1145 { 25fdd5933e4c0f Jeykumar Sankaran 2018-06-27 1146 struct dpu_encoder_virt *dpu_enc = NULL; 86b89080368b46 Jeykumar Sankaran 2018-09-05 1147 int ret = 0; c943b4948b5848 Chandan Uddaraju 2020-08-27 @1148 struct msm_drm_private *priv; 25fdd5933e4c0f Jeykumar Sankaran 2018-06-27 1149 struct drm_display_mode *cur_mode = NULL; 25fdd5933e4c0f Jeykumar Sankaran 2018-06-27 1150 25fdd5933e4c0f Jeykumar Sankaran 2018-06-27 1151 if (!drm_enc) { 25fdd5933e4c0f Jeykumar Sankaran 2018-06-27 1152 DPU_ERROR("invalid encoder\n"); 25fdd5933e4c0f Jeykumar Sankaran 2018-06-27 1153 return; 25fdd5933e4c0f Jeykumar Sankaran 2018-06-27 1154 } 25fdd5933e4c0f Jeykumar Sankaran 2018-06-27 1155 dpu_enc = to_dpu_encoder_virt(drm_enc); fba7427eb59496 Sean Paul 2018-11-16 1156 fba7427eb59496 Sean Paul 2018-11-16 1157 mutex_lock(&dpu_enc->enc_lock); 25fdd5933e4c0f Jeykumar Sankaran 2018-06-27 1158 cur_mode = &dpu_enc->base.crtc->state->adjusted_mode; c943b4948b5848 Chandan Uddaraju 2020-08-27 1159 priv = drm_enc->dev->dev_private; 25fdd5933e4c0f Jeykumar Sankaran 2018-06-27 1160 25fdd5933e4c0f Jeykumar Sankaran 2018-06-27 1161 trace_dpu_enc_enable(DRMID(drm_enc), cur_mode->hdisplay, 25fdd5933e4c0f Jeykumar Sankaran 2018-06-27 1162 cur_mode->vdisplay); 25fdd5933e4c0f Jeykumar Sankaran 2018-06-27 1163 86b89080368b46 Jeykumar Sankaran 2018-09-05 1164 /* always enable slave encoder before master */ 86b89080368b46 Jeykumar Sankaran 2018-09-05 1165 if (dpu_enc->cur_slave && dpu_enc->cur_slave->ops.enable) 86b89080368b46 Jeykumar Sankaran 2018-09-05 1166 dpu_enc->cur_slave->ops.enable(dpu_enc->cur_slave); 25fdd5933e4c0f Jeykumar Sankaran 2018-06-27 1167 86b89080368b46 Jeykumar Sankaran 2018-09-05 1168 if (dpu_enc->cur_master && dpu_enc->cur_master->ops.enable) 86b89080368b46 Jeykumar Sankaran 2018-09-05 1169 dpu_enc->cur_master->ops.enable(dpu_enc->cur_master); 25fdd5933e4c0f Jeykumar Sankaran 2018-06-27 1170 25fdd5933e4c0f Jeykumar Sankaran 2018-06-27 1171 ret = dpu_encoder_resource_control(drm_enc, DPU_ENC_RC_EVENT_KICKOFF); 25fdd5933e4c0f Jeykumar Sankaran 2018-06-27 1172 if (ret) { 25fdd5933e4c0f Jeykumar Sankaran 2018-06-27 1173 DPU_ERROR_ENC(dpu_enc, "dpu resource control failed: %d\n", 25fdd5933e4c0f Jeykumar Sankaran 2018-06-27 1174 ret); fba7427eb59496 Sean Paul 2018-11-16 1175 goto out; 25fdd5933e4c0f Jeykumar Sankaran 2018-06-27 1176 } 25fdd5933e4c0f Jeykumar Sankaran 2018-06-27 1177 25fdd5933e4c0f Jeykumar Sankaran 2018-06-27 1178 _dpu_encoder_virt_enable_helper(drm_enc); fba7427eb59496 Sean Paul 2018-11-16 1179 167dac97eb46c7 Bjorn Andersson 2021-10-16 1180 if (drm_enc->encoder_type == DRM_MODE_ENCODER_TMDS) { 167dac97eb46c7 Bjorn Andersson 2021-10-16 1181 ret = msm_dp_display_enable(dpu_enc->dp, drm_enc); c943b4948b5848 Chandan Uddaraju 2020-08-27 1182 if (ret) { c943b4948b5848 Chandan Uddaraju 2020-08-27 1183 DPU_ERROR_ENC(dpu_enc, "dp display enable failed: %d\n", c943b4948b5848 Chandan Uddaraju 2020-08-27 1184 ret); c943b4948b5848 Chandan Uddaraju 2020-08-27 1185 goto out; c943b4948b5848 Chandan Uddaraju 2020-08-27 1186 } c943b4948b5848 Chandan Uddaraju 2020-08-27 1187 } fba7427eb59496 Sean Paul 2018-11-16 1188 dpu_enc->enabled = true; fba7427eb59496 Sean Paul 2018-11-16 1189 fba7427eb59496 Sean Paul 2018-11-16 1190 out: fba7427eb59496 Sean Paul 2018-11-16 1191 mutex_unlock(&dpu_enc->enc_lock); 25fdd5933e4c0f Jeykumar Sankaran 2018-06-27 1192 } 25fdd5933e4c0f Jeykumar Sankaran 2018-06-27 1193 :::::: The code at line 1148 was first introduced by commit :::::: c943b4948b5848fc0e07f875edbd35a973879e22 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