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Message-ID: <202204240503.RZCZdjrQ-lkp@intel.com>
Date: Sun, 24 Apr 2022 05:46:43 +0800
From: kernel test robot <lkp@...el.com>
To: Fangzhi Zuo <Jerry.Zuo@....com>
Cc: kbuild-all@...ts.01.org, linux-kernel@...r.kernel.org,
Lyude Paul <lyude@...hat.com>,
"Lin, Wayne" <Wayne.Lin@....com>,
Bhawanpreet Lakha <Bhawanpreet.Lakha@....com>
Subject: drivers/gpu/drm/amd/amdgpu/../display/dc/core/dc_link.c:3602:32:
warning: variable 'ret' set but not used
tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head: 13bc32bad7059d6c5671e9d037e6e3ed001cc0f4
commit: d740e0bf8ed4c14ac6a616e2b31626bdcf417135 drm/amd/display: Add DP 2.0 MST DC Support
date: 6 months ago
config: powerpc64-randconfig-r033-20220420 (https://download.01.org/0day-ci/archive/20220424/202204240503.RZCZdjrQ-lkp@intel.com/config)
compiler: powerpc64le-linux-gcc (GCC) 11.2.0
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
# https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=d740e0bf8ed4c14ac6a616e2b31626bdcf417135
git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
git fetch --no-tags linus master
git checkout d740e0bf8ed4c14ac6a616e2b31626bdcf417135
# save the config file
mkdir build_dir && cp config build_dir/.config
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross W=1 O=build_dir ARCH=powerpc SHELL=/bin/bash
If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@...el.com>
All warnings (new ones prefixed by >>):
In file included from drivers/gpu/drm/amd/amdgpu/../display/dmub/dmub_srv.h:67,
from drivers/gpu/drm/amd/amdgpu/../display/dc/core/dc_link.c:49:
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:2819:26: warning: variable 'temp' set but not used [-Wunused-but-set-variable]
2819 | uint64_t temp;
| ^~~~
drivers/gpu/drm/amd/amdgpu/../display/dc/core/dc_link.c: In function 'dc_link_reduce_mst_payload':
>> drivers/gpu/drm/amd/amdgpu/../display/dc/core/dc_link.c:3602:32: warning: variable 'ret' set but not used [-Wunused-but-set-variable]
3602 | enum act_return_status ret;
| ^~~
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
https://01.org/lkp
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