1:06 a.m.
Hi Mikita,
FYI, the error/warning still remains.
tree: https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master
head: e99d8a8495175df8cb8b739f8cf9b0fc9d0cd3b5
commit: 70cca14c2cb134fa578b45bbb7a133d39513cbad [10806/11648] drm/amd/display: Add MST
capability to trigger_hotplug interface
config: powerpc-randconfig-r005-20210409 (attached as .config)
compiler: clang version 13.0.0 (https://github.com/llvm/llvm-project
dd453a1389b6a7e6d9214b449d3c54981b1a89b6)
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
#
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 70cca14c2cb134fa578b45bbb7a133d39513cbad
# 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>
All warnings (new ones prefixed by >>):
>
drivers/gpu/drm/amd/amdgpu/../display/amdgpu_dm/amdgpu_dm_debugfs.c:3015:53: warning:
address of 'aconnector->mst_port->mst_mgr' will always evaluate to
'true' [-Wpointer-bool-conversion]
if
(!(aconnector->port && &aconnector->mst_port->mst_mgr))
~~ ~~~~~~~~~~~~~~~~~~~~~~^~~~~~~
1 warning generated.
vim +3015 drivers/gpu/drm/amd/amdgpu/../display/amdgpu_dm/amdgpu_dm_debugfs.c
2981
2982 /*
2983 * Sets trigger hpd for MST topologies.
2984 * All connected connectors will be rediscovered and re started as needed if val of
1 is sent.
2985 * All topologies will be disconnected if val of 0 is set .
2986 * Usage to enable topologies: echo 1 >
/sys/kernel/debug/dri/0/amdgpu_dm_trigger_hpd_mst
2987 * Usage to disable topologies: echo 0 >
/sys/kernel/debug/dri/0/amdgpu_dm_trigger_hpd_mst
2988 */
2989 static int trigger_hpd_mst_set(void *data, u64 val)
2990 {
2991 struct amdgpu_device *adev = data;
2992 struct drm_device *dev = adev_to_drm(adev);
2993 struct drm_connector_list_iter iter;
2994 struct amdgpu_dm_connector *aconnector;
2995 struct drm_connector *connector;
2996 struct dc_link *link = NULL;
2997
2998 if (val == 1) {
2999 drm_connector_list_iter_begin(dev, &iter);
3000 drm_for_each_connector_iter(connector, &iter) {
3001 aconnector = to_amdgpu_dm_connector(connector);
3002 if (aconnector->dc_link->type == dc_connection_mst_branch &&
3003 aconnector->mst_mgr.aux) {
3004 dc_link_detect(aconnector->dc_link, DETECT_REASON_HPD);
3005 drm_dp_mst_topology_mgr_set_mst(&aconnector->mst_mgr, true);
3006 }
3007 }
3008 } else if (val == 0) {
3009 drm_connector_list_iter_begin(dev, &iter);
3010 drm_for_each_connector_iter(connector, &iter) {
3011 aconnector = to_amdgpu_dm_connector(connector);
3012 if (!aconnector->dc_link)
3013 continue;
3014
3015 if (!(aconnector->port &&
&aconnector->mst_port->mst_mgr))
3016 continue;
3017
3018 link = aconnector->dc_link;
3019 dp_receiver_power_ctrl(link, false);
3020 drm_dp_mst_topology_mgr_set_mst(&aconnector->mst_port->mst_mgr,
false);
3021 link->mst_stream_alloc_table.stream_count = 0;
3022 memset(link->mst_stream_alloc_table.stream_allocations, 0,
3023 sizeof(link->mst_stream_alloc_table.stream_allocations));
3024 }
3025 } else {
3026 return 0;
3027 }
3028 drm_kms_helper_hotplug_event(dev);
3029
3030 return 0;
3031 }
3032
---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org