tree: https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master head: 9150de4aac1eb6e6441b2b086f6ca8132aaea040 commit: d740e0bf8ed4c14ac6a616e2b31626bdcf417135 [10481/12941] drm/amd/display: Add DP 2.0 MST DC Support config: i386-buildonly-randconfig-r002-20211101 (attached as .config) compiler: clang version 14.0.0 (https://github.com/llvm/llvm-project 264d3b6d4e08401c5b50a85bd76e80b3461d77e6) 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 # https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/commit/?id=d740e0bf8ed4c14ac6a616e2b31626bdcf417135 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 d740e0bf8ed4c14ac6a616e2b31626bdcf417135 # 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@xxxxxxxxx> All errors (new ones prefixed by >>): In file included from drivers/gpu/drm/amd/amdgpu/../display/dc/core/dc_link.c:49: In file included from drivers/gpu/drm/amd/amdgpu/../display/dmub/dmub_srv.h:67: drivers/gpu/drm/amd/amdgpu/../display/dmub/inc/dmub_cmd.h:2819:12: error: variable 'temp' set but not used [-Werror,-Wunused-but-set-variable] uint64_t temp; ^ drivers/gpu/drm/amd/amdgpu/../display/dc/core/dc_link.c:3354:16: error: no previous prototype for function 'dc_link_update_sst_payload' [-Werror,-Wmissing-prototypes] enum dc_status dc_link_update_sst_payload(struct pipe_ctx *pipe_ctx, bool allocate) ^ drivers/gpu/drm/amd/amdgpu/../display/dc/core/dc_link.c:3354:1: note: declare 'static' if the function is not intended to be used outside of this translation unit enum dc_status dc_link_update_sst_payload(struct pipe_ctx *pipe_ctx, bool allocate) ^ static >> drivers/gpu/drm/amd/amdgpu/../display/dc/core/dc_link.c:3602:25: error: variable 'ret' set but not used [-Werror,-Wunused-but-set-variable] enum act_return_status ret; ^ 3 errors generated. vim +/ret +3602 drivers/gpu/drm/amd/amdgpu/../display/dc/core/dc_link.c 3589 3590 #if defined(CONFIG_DRM_AMD_DC_DCN) 3591 enum dc_status dc_link_reduce_mst_payload(struct pipe_ctx *pipe_ctx, uint32_t bw_in_kbps) 3592 { 3593 struct dc_stream_state *stream = pipe_ctx->stream; 3594 struct dc_link *link = stream->link; 3595 struct fixed31_32 avg_time_slots_per_mtp; 3596 struct fixed31_32 pbn; 3597 struct fixed31_32 pbn_per_slot; 3598 struct link_encoder *link_encoder = link->link_enc; 3599 struct stream_encoder *stream_encoder = pipe_ctx->stream_res.stream_enc; 3600 struct dp_mst_stream_allocation_table proposed_table = {0}; 3601 uint8_t i; > 3602 enum act_return_status ret; 3603 DC_LOGGER_INIT(link->ctx->logger); 3604 3605 /* decrease throttled vcp size */ 3606 pbn_per_slot = get_pbn_per_slot(stream); 3607 pbn = get_pbn_from_bw_in_kbps(bw_in_kbps); 3608 avg_time_slots_per_mtp = dc_fixpt_div(pbn, pbn_per_slot); 3609 3610 stream_encoder->funcs->set_throttled_vcp_size( 3611 stream_encoder, 3612 avg_time_slots_per_mtp); 3613 3614 /* send ALLOCATE_PAYLOAD sideband message with updated pbn */ 3615 dm_helpers_dp_mst_send_payload_allocation( 3616 stream->ctx, 3617 stream, 3618 true); 3619 3620 /* notify immediate branch device table update */ 3621 if (dm_helpers_dp_mst_write_payload_allocation_table( 3622 stream->ctx, 3623 stream, 3624 &proposed_table, 3625 true)) { 3626 /* update mst stream allocation table software state */ 3627 update_mst_stream_alloc_table( 3628 link, 3629 pipe_ctx->stream_res.stream_enc, 3630 pipe_ctx->stream_res.hpo_dp_stream_enc, 3631 &proposed_table); 3632 } else { 3633 DC_LOG_WARNING("Failed to update" 3634 "MST allocation table for" 3635 "pipe idx:%d\n", 3636 pipe_ctx->pipe_idx); 3637 } 3638 3639 DC_LOG_MST("%s " 3640 "stream_count: %d: \n ", 3641 __func__, 3642 link->mst_stream_alloc_table.stream_count); 3643 3644 for (i = 0; i < MAX_CONTROLLER_NUM; i++) { 3645 DC_LOG_MST("stream_enc[%d]: %p " 3646 "stream[%d].vcp_id: %d " 3647 "stream[%d].slot_count: %d\n", 3648 i, 3649 (void *) link->mst_stream_alloc_table.stream_allocations[i].stream_enc, 3650 i, 3651 link->mst_stream_alloc_table.stream_allocations[i].vcp_id, 3652 i, 3653 link->mst_stream_alloc_table.stream_allocations[i].slot_count); 3654 } 3655 3656 ASSERT(proposed_table.stream_count > 0); 3657 3658 /* update mst stream allocation table hardware state */ 3659 link_encoder->funcs->update_mst_stream_allocation_table( 3660 link_encoder, 3661 &link->mst_stream_alloc_table); 3662 3663 /* poll for immediate branch device ACT handled */ 3664 ret = dm_helpers_dp_mst_poll_for_allocation_change_trigger( 3665 stream->ctx, 3666 stream); 3667 3668 return DC_OK; 3669 } 3670 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@xxxxxxxxxxxx
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