tree: https://gitlab.freedesktop.org/agd5f/linux.git drm-next head: eaae0714f4a82df81a60c6aae74c568e8974a716 commit: f4d596654cc62c4f41efc772d62c6ec31d3e102a [59/92] drm/amd/display: Enable DSC over eDP config: i386-randconfig-r005-20211118 (attached as .config) compiler: clang version 14.0.0 (https://github.com/llvm/llvm-project c46becf500df2a7fb4b4fce16178a036c344315a) 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 remote add agd5f https://gitlab.freedesktop.org/agd5f/linux.git git fetch --no-tags agd5f drm-next git checkout f4d596654cc62c4f41efc772d62c6ec31d3e102a # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 ARCH=i386 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 >>): if (stream->signal == SIGNAL_TYPE_DISPLAY_PORT || SIGNAL_TYPE_EDP) { ^ 1 warning generated. vim +587 drivers/gpu/drm/amd/amdgpu/../display/amdgpu_dm/amdgpu_dm_helpers.c 531 532 bool dm_helpers_submit_i2c( 533 struct dc_context *ctx, 534 const struct dc_link *link, 535 struct i2c_command *cmd) 536 { 537 struct amdgpu_dm_connector *aconnector = link->priv; 538 struct i2c_msg *msgs; 539 int i = 0; 540 int num = cmd->number_of_payloads; 541 bool result; 542 543 if (!aconnector) { 544 DRM_ERROR("Failed to find connector for link!"); 545 return false; 546 } 547 548 msgs = kcalloc(num, sizeof(struct i2c_msg), GFP_KERNEL); 549 550 if (!msgs) 551 return false; 552 553 for (i = 0; i < num; i++) { 554 msgs[i].flags = cmd->payloads[i].write ? 0 : I2C_M_RD; 555 msgs[i].addr = cmd->payloads[i].address; 556 msgs[i].len = cmd->payloads[i].length; 557 msgs[i].buf = cmd->payloads[i].data; 558 } 559 560 result = i2c_transfer(&aconnector->i2c->base, msgs, num) == num; 561 562 kfree(msgs); 563 564 return result; 565 } 566 bool dm_helpers_dp_write_dsc_enable( 567 struct dc_context *ctx, 568 const struct dc_stream_state *stream, 569 bool enable) 570 { 571 uint8_t enable_dsc = enable ? 1 : 0; 572 struct amdgpu_dm_connector *aconnector; 573 uint8_t ret = 0; 574 575 if (!stream) 576 return false; 577 578 if (stream->signal == SIGNAL_TYPE_DISPLAY_PORT_MST) { 579 aconnector = (struct amdgpu_dm_connector *)stream->dm_stream_context; 580 581 if (!aconnector->dsc_aux) 582 return false; 583 584 ret = drm_dp_dpcd_write(aconnector->dsc_aux, DP_DSC_ENABLE, &enable_dsc, 1); 585 } 586 588 ret = dm_helpers_dp_write_dpcd(ctx, stream->link, DP_DSC_ENABLE, &enable_dsc, 1); 589 DC_LOG_DC("Send DSC %s to sst display\n", enable_dsc ? "enable" : "disable"); 590 } 591 592 return (ret > 0); 593 } 594 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org