Hi Abhinav, [FYI, it's a private test report for your RFC patch.] [auto build test ERROR on drm/drm-next] [also build test ERROR on drm-intel/for-linux-next drm-tip/drm-tip drm-exynos/exynos-drm-next tegra-drm/drm/tegra/for-next v5.16 next-20220121] [cannot apply to airlied/drm-next] [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/Abhinav-Kumar/drm-allow-passing-... base: git://anongit.freedesktop.org/drm/drm drm-next config: arm64-randconfig-r011-20220120 (https://download.01.org/0day-ci/archive/20220121/202201211543.ZApV4jVl-lk...) compiler: clang version 14.0.0 (https://github.com/llvm/llvm-project d4baf3b1322b84816aa623d8e8cb45a49cb68b84) 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 arm64 cross compiling tool for clang build # apt-get install binutils-aarch64-linux-gnu # https://github.com/0day-ci/linux/commit/ce1d81913d9146f6e753c39f41929266a... git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Abhinav-Kumar/drm-allow-passing-a-real-encoder-object-for-wb-connector/20220121-103231 git checkout ce1d81913d9146f6e753c39f41929266a5885f99 # 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=arm64 SHELL=/bin/bash drivers/gpu/drm/arm/ drivers/gpu/drm/rcar-du/ 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 >>): malidp->mw_connector.encoder.possible_crtcs = 1 << drm_crtc_index(&malidp->crtc); ~~~~~~~~~~~~~~~~~~~~~~~~~~~~^ -> 1 error generated. -- wb_conn->encoder.possible_crtcs = 1 << drm_crtc_index(&rcrtc->crtc); ~~~~~~~~~~~~~~~~^ -> 1 error generated. -- wb_conn->encoder.possible_crtcs = BIT(drm_crtc_index(&kcrtc->base)); ~~~~~~~~~~~~~~~~^ -> 1 error generated. vim +215 drivers/gpu/drm/arm/malidp_mw.c 8cbc5caf36ef7a Brian Starkey 2017-11-02 205 8cbc5caf36ef7a Brian Starkey 2017-11-02 206 int malidp_mw_connector_init(struct drm_device *drm) 8cbc5caf36ef7a Brian Starkey 2017-11-02 207 { 8cbc5caf36ef7a Brian Starkey 2017-11-02 208 struct malidp_drm *malidp = drm->dev_private; 8cbc5caf36ef7a Brian Starkey 2017-11-02 209 u32 *formats; 8cbc5caf36ef7a Brian Starkey 2017-11-02 210 int ret, n_formats; 8cbc5caf36ef7a Brian Starkey 2017-11-02 211 8cbc5caf36ef7a Brian Starkey 2017-11-02 212 if (!malidp->dev->hw->enable_memwrite) 8cbc5caf36ef7a Brian Starkey 2017-11-02 213 return 0; 8cbc5caf36ef7a Brian Starkey 2017-11-02 214 8cbc5caf36ef7a Brian Starkey 2017-11-02 @215 malidp->mw_connector.encoder.possible_crtcs = 1 << drm_crtc_index(&malidp->crtc); 8cbc5caf36ef7a Brian Starkey 2017-11-02 216 drm_connector_helper_add(&malidp->mw_connector.base, 8cbc5caf36ef7a Brian Starkey 2017-11-02 217 &malidp_mw_connector_helper_funcs); 8cbc5caf36ef7a Brian Starkey 2017-11-02 218 8cbc5caf36ef7a Brian Starkey 2017-11-02 219 formats = get_writeback_formats(malidp, &n_formats); 8cbc5caf36ef7a Brian Starkey 2017-11-02 220 if (!formats) 8cbc5caf36ef7a Brian Starkey 2017-11-02 221 return -ENOMEM; 8cbc5caf36ef7a Brian Starkey 2017-11-02 222 8cbc5caf36ef7a Brian Starkey 2017-11-02 223 ret = drm_writeback_connector_init(drm, &malidp->mw_connector, 8cbc5caf36ef7a Brian Starkey 2017-11-02 224 &malidp_mw_connector_funcs, 8cbc5caf36ef7a Brian Starkey 2017-11-02 225 &malidp_mw_encoder_helper_funcs, 8cbc5caf36ef7a Brian Starkey 2017-11-02 226 formats, n_formats); 8cbc5caf36ef7a Brian Starkey 2017-11-02 227 kfree(formats); 8cbc5caf36ef7a Brian Starkey 2017-11-02 228 if (ret) 8cbc5caf36ef7a Brian Starkey 2017-11-02 229 return ret; 8cbc5caf36ef7a Brian Starkey 2017-11-02 230 8cbc5caf36ef7a Brian Starkey 2017-11-02 231 return 0; 8cbc5caf36ef7a Brian Starkey 2017-11-02 232 } 8cbc5caf36ef7a Brian Starkey 2017-11-02 233 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org