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drm/amd/display: Catch errors from drm_atomic_helper_suspend()

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drm_atomic_helper_suspend() can return PTR_ERR(), in which case the
error gets stored into `dm->cached_state`.  This can cause failures
during resume.  Catch the error during suspend and fail the suspend
instead.

Link: https://gitlab.freedesktop.org/drm/amd/-/issues/2362
Acked-by: Christian König <christian.koenig@amd.com>
Acked-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Mario Limonciello <mario.limonciello@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Mario Limonciello
2023-10-06 13:50:24 -05:00
committed by Alex Deucher
parent db99889065
commit f7fbf79fb5
1 changed files with 2 additions and 0 deletions
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drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
+2
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@@ -2698,6 +2698,8 @@ static int dm_suspend(void *handle)
WARN_ON(adev->dm.cached_state);
adev->dm.cached_state = drm_atomic_helper_suspend(adev_to_drm(adev));
if (IS_ERR(adev->dm.cached_state))
return PTR_ERR(adev->dm.cached_state);
s3_handle_mst(adev_to_drm(adev), true);