tree: https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master head: 5fa35f247b563a7893f3f68f19d00ace2ccf3dff commit: 0749ddeb7d6c87e04446c068c03b097d4aa19173 [7650/8311] drm/amd/display: Add DSC force disable to dsc_clock_en debugfs entry config: powerpc-randconfig-r011-20200916 (attached as .config) compiler: clang version 12.0.0 (https://github.com/llvm/llvm-project 9e3842d60351f986d77dfe0a94f76e4fd895f188) 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 powerpc cross compiling tool for clang build # apt-get install binutils-powerpc-linux-gnu git checkout 0749ddeb7d6c87e04446c068c03b097d4aa19173 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=powerpc 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 >>): && !params[i].clock_force_enable == DSC_CLK_FORCE_DEFAULT) { ^ ~~ drivers/gpu/drm/amd/amdgpu/../display/amdgpu_dm/amdgpu_dm_mst_types.c:641:8: note: add parentheses after the '!' to evaluate the comparison first && !params[i].clock_force_enable == DSC_CLK_FORCE_DEFAULT) { ^ ( ) drivers/gpu/drm/amd/amdgpu/../display/amdgpu_dm/amdgpu_dm_mst_types.c:641:8: note: add parentheses around left hand side expression to silence this warning && !params[i].clock_force_enable == DSC_CLK_FORCE_DEFAULT) { ^ ( ) 1 warning generated. # https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/commi... git remote add linux-next https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git git fetch --no-tags linux-next master git checkout 0749ddeb7d6c87e04446c068c03b097d4aa19173 vim +641 drivers/gpu/drm/amd/amdgpu/../display/amdgpu_dm/amdgpu_dm_mst_types.c 624 625 static void try_disable_dsc(struct drm_atomic_state *state, 626 struct dc_link *dc_link, 627 struct dsc_mst_fairness_params *params, 628 struct dsc_mst_fairness_vars *vars, 629 int count) 630 { 631 int i; 632 bool tried[MAX_PIPES]; 633 int kbps_increase[MAX_PIPES]; 634 int max_kbps_increase; 635 int next_index; 636 int remaining_to_try = 0; 637 638 for (i = 0; i < count; i++) { 639 if (vars[i].dsc_enabled 640 && vars[i].bpp_x16 == params[i].bw_range.max_target_bpp_x16 642 kbps_increase[i] = params[i].bw_range.stream_kbps - params[i].bw_range.max_kbps; 643 tried[i] = false; 644 remaining_to_try += 1; 645 } else { 646 kbps_increase[i] = 0; 647 tried[i] = true; 648 } 649 } 650 651 while (remaining_to_try) { 652 next_index = -1; 653 max_kbps_increase = -1; 654 for (i = 0; i < count; i++) { 655 if (!tried[i]) { 656 if (max_kbps_increase == -1 || max_kbps_increase < kbps_increase[i]) { 657 max_kbps_increase = kbps_increase[i]; 658 next_index = i; 659 } 660 } 661 } 662 663 if (next_index == -1) 664 break; 665 666 vars[next_index].pbn = kbps_to_peak_pbn(params[next_index].bw_range.stream_kbps); 667 if (drm_dp_atomic_find_vcpi_slots(state, 668 params[next_index].port->mgr, 669 params[next_index].port, 670 vars[next_index].pbn, 671 dm_mst_get_pbn_divider(dc_link)) < 0) 672 return; 673 674 if (!drm_dp_mst_atomic_check(state)) { 675 vars[next_index].dsc_enabled = false; 676 vars[next_index].bpp_x16 = 0; 677 } else { 678 vars[next_index].pbn = kbps_to_peak_pbn(params[next_index].bw_range.max_kbps); 679 if (drm_dp_atomic_find_vcpi_slots(state, 680 params[next_index].port->mgr, 681 params[next_index].port, 682 vars[next_index].pbn, 683 dm_mst_get_pbn_divider(dc_link)) < 0) 684 return; 685 } 686 687 tried[next_index] = true; 688 remaining_to_try--; 689 } 690 } 691 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org