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drm/amd/display: Fix system hang while resume with TBT monitor

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commit 52d4e3fb3d upstream.

[Why]
Connected with a Thunderbolt monitor and do the suspend and the system
may hang while resume.

The TBT monitor HPD will be triggered during the resume procedure
and call the drm_client_modeset_probe() while
struct drm_connector connector->dev->master is NULL.

It will mess up the pipe topology after resume.

[How]
Skip the TBT monitor HPD during the resume procedure because we
currently will probe the connectors after resume by default.

Reviewed-by: Wayne Lin <wayne.lin@amd.com>
Signed-off-by: Tom Chung <chiahsuan.chung@amd.com>
Signed-off-by: Fangzhi Zuo <jerry.zuo@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
(cherry picked from commit 453f86a26945207a16b8f66aaed5962dc2b95b85)
Cc: stable@vger.kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Tom Chung 2024-09-13 15:44:40 +08:00 committed by Greg Kroah-Hartman
parent 487f6450bc
commit 68d603f467
1 changed files with 6 additions and 0 deletions
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6
drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
View File

@ -714,6 +714,12 @@ static void dmub_hpd_callback(struct amdgpu_device *adev,
return;
}
/* Skip DMUB HPD IRQ in suspend/resume. We will probe them later. */
if (notify->type == DMUB_NOTIFICATION_HPD && adev->in_suspend) {
DRM_INFO("Skip DMUB HPD IRQ callback in suspend/resume\n");
return;
}
link_index = notify->link_index;
link = adev->dm.dc->links[link_index];
dev = adev->dm.ddev;