tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master head: 1b5044021070efa3259f3e9548dc35d1eb6aa844 commit: fe8db3bcf2e5f9d9056f923b12c7158d6541e435 drm/amd/display: query hdcp capability during link detect date: 10 weeks ago config: arc-randconfig-r036-20200617 (attached as .config) compiler: arc-elf-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 git checkout fe8db3bcf2e5f9d9056f923b12c7158d6541e435 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=arc 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 >>, old ones prefixed by <<): drivers/gpu/drm/amd/amdgpu/../display/dc/core/dc_link.c: In function 'query_hdcp_capability': 547 | enum hdcp_message_status status = HDCP_MESSAGE_UNSUPPORTED; | ^~~~~~ In file included from drivers/gpu/drm/amd/amdgpu/../display/dc/inc/core_types.h:85, from drivers/gpu/drm/amd/amdgpu/../display/dc/inc/resource.h:28, from drivers/gpu/drm/amd/amdgpu/../display/dc/core/dc_link.c:42: At top level: drivers/gpu/drm/amd/amdgpu/../display/dc/inc/hw/dpp.h:50:42: warning: 'dpp_input_csc_matrix' defined but not used [-Wunused-const-variable=] 50 | static const struct dpp_input_csc_matrix dpp_input_csc_matrix[] = { | ^~~~~~~~~~~~~~~~~~~~ In file included from drivers/gpu/drm/amd/amdgpu/../display/dc/inc/dc_link_ddc.h:29, from drivers/gpu/drm/amd/amdgpu/../display/dc/core/dc_link.c:36: drivers/gpu/drm/amd/amdgpu/../display/include/ddc_service_types.h:124:22: warning: 'DP_DVI_CONVERTER_ID_4' defined but not used [-Wunused-const-variable=] 124 | static const uint8_t DP_DVI_CONVERTER_ID_4[] = "m2DVIa"; | ^~~~~~~~~~~~~~~~~~~~~ drivers/gpu/drm/amd/amdgpu/../display/include/ddc_service_types.h:122:22: warning: 'DP_VGA_LVDS_CONVERTER_ID_3' defined but not used [-Wunused-const-variable=] 122 | static const uint8_t DP_VGA_LVDS_CONVERTER_ID_3[] = "dnomlA"; | ^~~~~~~~~~~~~~~~~~~~~~~~~~ drivers/gpu/drm/amd/amdgpu/../display/include/ddc_service_types.h:120:22: warning: 'DP_VGA_LVDS_CONVERTER_ID_2' defined but not used [-Wunused-const-variable=] 120 | static const uint8_t DP_VGA_LVDS_CONVERTER_ID_2[] = "sivarT"; | ^~~~~~~~~~~~~~~~~~~~~~~~~~ In file included from drivers/gpu/drm/amd/amdgpu/../display/dc/dc_types.h:33, from drivers/gpu/drm/amd/amdgpu/../display/dc/dm_services_types.h:30, from drivers/gpu/drm/amd/amdgpu/../display/dc/dm_services.h:37, from drivers/gpu/drm/amd/amdgpu/../display/dc/core/dc_link.c:28: drivers/gpu/drm/amd/amdgpu/../display/include/fixed31_32.h:76:32: warning: 'dc_fixpt_ln2_div_2' defined but not used [-Wunused-const-variable=] 76 | static const struct fixed31_32 dc_fixpt_ln2_div_2 = { 1488522236LL }; | ^~~~~~~~~~~~~~~~~~ drivers/gpu/drm/amd/amdgpu/../display/include/fixed31_32.h:75:32: warning: 'dc_fixpt_ln2' defined but not used [-Wunused-const-variable=] 75 | static const struct fixed31_32 dc_fixpt_ln2 = { 2977044471LL }; | ^~~~~~~~~~~~ drivers/gpu/drm/amd/amdgpu/../display/include/fixed31_32.h:74:32: warning: 'dc_fixpt_e' defined but not used [-Wunused-const-variable=] 74 | static const struct fixed31_32 dc_fixpt_e = { 11674931555LL }; | ^~~~~~~~~~ drivers/gpu/drm/amd/amdgpu/../display/include/fixed31_32.h:73:32: warning: 'dc_fixpt_two_pi' defined but not used [-Wunused-const-variable=] 73 | static const struct fixed31_32 dc_fixpt_two_pi = { 26986075409LL }; | ^~~~~~~~~~~~~~~ drivers/gpu/drm/amd/amdgpu/../display/include/fixed31_32.h:72:32: warning: 'dc_fixpt_pi' defined but not used [-Wunused-const-variable=] 72 | static const struct fixed31_32 dc_fixpt_pi = { 13493037705LL }; | ^~~~~~~~~~~ drivers/gpu/drm/amd/amdgpu/../display/include/fixed31_32.h:67:32: warning: 'dc_fixpt_zero' defined but not used [-Wunused-const-variable=] 67 | static const struct fixed31_32 dc_fixpt_zero = { 0 }; | ^~~~~~~~~~~~~ vim +/status +547 drivers/gpu/drm/amd/amdgpu/../display/dc/core/dc_link.c 517 518 #if defined(CONFIG_DRM_AMD_DC_HDCP) 519 static void query_hdcp_capability(enum signal_type signal, struct dc_link *link) 520 { 521 struct hdcp_protection_message msg22; 522 struct hdcp_protection_message msg14; 523 524 memset(&msg22, 0, sizeof(struct hdcp_protection_message)); 525 memset(&msg14, 0, sizeof(struct hdcp_protection_message)); 526 memset(link->hdcp_caps.rx_caps.raw, 0, 527 sizeof(link->hdcp_caps.rx_caps.raw)); 528 529 if ((link->connector_signal == SIGNAL_TYPE_DISPLAY_PORT && 530 link->ddc->transaction_type == 531 DDC_TRANSACTION_TYPE_I2C_OVER_AUX) || 532 link->connector_signal == SIGNAL_TYPE_EDP) { 533 msg22.data = link->hdcp_caps.rx_caps.raw; 534 msg22.length = sizeof(link->hdcp_caps.rx_caps.raw); 535 msg22.msg_id = HDCP_MESSAGE_ID_RX_CAPS; 536 } else { 537 msg22.data = &link->hdcp_caps.rx_caps.fields.version; 538 msg22.length = sizeof(link->hdcp_caps.rx_caps.fields.version); 539 msg22.msg_id = HDCP_MESSAGE_ID_HDCP2VERSION; 540 } 541 msg22.version = HDCP_VERSION_22; 542 msg22.link = HDCP_LINK_PRIMARY; 543 msg22.max_retries = 5; 544 dc_process_hdcp_msg(signal, link, &msg22); 545 546 if (signal == SIGNAL_TYPE_DISPLAY_PORT || signal == SIGNAL_TYPE_DISPLAY_PORT_MST) { 548 549 msg14.data = &link->hdcp_caps.bcaps.raw; 550 msg14.length = sizeof(link->hdcp_caps.bcaps.raw); 551 msg14.msg_id = HDCP_MESSAGE_ID_READ_BCAPS; 552 msg14.version = HDCP_VERSION_14; 553 msg14.link = HDCP_LINK_PRIMARY; 554 msg14.max_retries = 5; 555 556 status = dc_process_hdcp_msg(signal, link, &msg14); 557 } 558 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org