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drm/amd/display: Skip on writeback when it's not applicable

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[ Upstream commit ecedd99a93 ]

[WHY]
dynamic memory safety error detector (KASAN) catches and generates error
messages "BUG: KASAN: slab-out-of-bounds" as writeback connector does not
support certain features which are not initialized.

[HOW]
Skip them when connector type is DRM_MODE_CONNECTOR_WRITEBACK.

Link: https://gitlab.freedesktop.org/drm/amd/-/issues/3199
Reviewed-by: Harry Wentland <harry.wentland@amd.com>
Reviewed-by: Rodrigo Siqueira <rodrigo.siqueira@amd.com>
Acked-by: Roman Li <roman.li@amd.com>
Signed-off-by: Alex Hung <alex.hung@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Alex Hung 2024-03-15 21:25:25 -06:00 committed by Greg Kroah-Hartman
parent c0beff4e35
commit 951a498fa9
1 changed files with 10 additions and 0 deletions
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10
drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
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@ -2974,6 +2974,10 @@ static int dm_resume(void *handle)
/* Do mst topology probing after resuming cached state*/
drm_connector_list_iter_begin(ddev, &iter);
drm_for_each_connector_iter(connector, &iter) {
if (connector->connector_type == DRM_MODE_CONNECTOR_WRITEBACK)
continue;
aconnector = to_amdgpu_dm_connector(connector);
if (aconnector->dc_link->type != dc_connection_mst_branch ||
aconnector->mst_root)
@ -5756,6 +5760,9 @@ get_highest_refresh_rate_mode(struct amdgpu_dm_connector *aconnector,
&aconnector->base.probed_modes :
&aconnector->base.modes;
if (aconnector->base.connector_type == DRM_MODE_CONNECTOR_WRITEBACK)
return NULL;
if (aconnector->freesync_vid_base.clock != 0)
return &aconnector->freesync_vid_base;
@ -8445,6 +8452,9 @@ static void amdgpu_dm_commit_audio(struct drm_device *dev,
continue;
notify:
if (connector->connector_type == DRM_MODE_CONNECTOR_WRITEBACK)
continue;
aconnector = to_amdgpu_dm_connector(connector);
mutex_lock(&adev->dm.audio_lock);