tree: https://gitlab.freedesktop.org/agd5f/linux.git drm-next head: 63e583c8843f305a3e334a96d5de00435f4d38a2 commit: 09db246ceef70bc6bd9c3e0d02b3c855f8fc25fb [150/190] drm/amd/display: Retrieve MST Downstream Port Status config: x86_64-buildonly-randconfig-r001-20220124 (https://download.01.org/0day-ci/archive/20220126/202201261139.VvN01ApM-lk...) compiler: gcc-9 (Debian 9.3.0-22) 9.3.0 reproduce (this is a W=1 build): git remote add agd5f https://gitlab.freedesktop.org/agd5f/linux.git git fetch --no-tags agd5f drm-next git checkout 09db246ceef70bc6bd9c3e0d02b3c855f8fc25fb # save the config file to linux build tree mkdir build_dir make W=1 O=build_dir ARCH=x86_64 SHELL=/bin/bash drivers/gpu/drm/ 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 >>): In file included from drivers/gpu/drm/amd/amdgpu/../display/amdgpu_dm/amdgpu_dm_mst_types.c:43: drivers/gpu/drm/amd/amdgpu/../display/dmub/inc/dmub_cmd.h: In function 'dmub_rb_flush_pending': drivers/gpu/drm/amd/amdgpu/../display/dmub/inc/dmub_cmd.h:2918:12: warning: variable 'temp' set but not used [-Wunused-but-set-variable] 2918 | uint64_t temp; | ^~~~ drivers/gpu/drm/amd/amdgpu/../display/amdgpu_dm/amdgpu_dm_mst_types.c: At top level: 213 | bool retrieve_downstream_port_device(struct amdgpu_dm_connector *aconnector) | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ In file included from drivers/gpu/drm/amd/amdgpu/../display/dc/inc/dc_link_ddc.h:29, from drivers/gpu/drm/amd/amdgpu/../display/amdgpu_dm/amdgpu_dm_mst_types.c:38: drivers/gpu/drm/amd/amdgpu/../display/include/ddc_service_types.h:124:22: warning: 'DP_SINK_DEVICE_STR_ID_2' defined but not used [-Wunused-const-variable=] 124 | static const uint8_t DP_SINK_DEVICE_STR_ID_2[] = {7, 1, 8, 7, 5, 0}; | ^~~~~~~~~~~~~~~~~~~~~~~ drivers/gpu/drm/amd/amdgpu/../display/include/ddc_service_types.h:123:22: warning: 'DP_SINK_DEVICE_STR_ID_1' defined but not used [-Wunused-const-variable=] 123 | static const uint8_t DP_SINK_DEVICE_STR_ID_1[] = {7, 1, 8, 7, 3, 0}; | ^~~~~~~~~~~~~~~~~~~~~~~ vim +/retrieve_downstream_port_device +213 drivers/gpu/drm/amd/amdgpu/../display/amdgpu_dm/amdgpu_dm_mst_types.c 212 214 { 215 union dp_downstream_port_present ds_port_present; 216 217 if (!aconnector->dsc_aux) 218 return false; 219 220 if (drm_dp_dpcd_read(aconnector->dsc_aux, DP_DOWNSTREAMPORT_PRESENT, &ds_port_present, 1) < 0) { 221 DRM_INFO("Failed to read downstream_port_present 0x05 from DFP of branch device\n"); 222 return false; 223 } 224 225 aconnector->mst_downstream_port_present = ds_port_present; 226 DRM_INFO("Downstream port present %d, type %d\n", 227 ds_port_present.fields.PORT_PRESENT, ds_port_present.fields.PORT_TYPE); 228 229 return true; 230 } 231 #endif 232 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org