Patch "drm/amd/display: fix the system hang while disable PSR" has been added to the 6.3-stable tree

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This is a note to let you know that I've just added the patch titled

    drm/amd/display: fix the system hang while disable PSR

to the 6.3-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     drm-amd-display-fix-the-system-hang-while-disable-ps.patch
and it can be found in the queue-6.3 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.



commit 2902a6a2fe404780d51fac1c1bf9a4aee95988c8
Author: Tom Chung <chiahsuan.chung@xxxxxxx>
Date:   Mon May 29 18:00:09 2023 +0800

    drm/amd/display: fix the system hang while disable PSR
    
    [ Upstream commit ea2062dd1f0384ae1b136d333ee4ced15bedae38 ]
    
    [Why]
    When the PSR enabled. If you try to adjust the timing parameters,
    it may cause system hang. Because the timing mismatch with the
    DMCUB settings.
    
    [How]
    Disable the PSR before adjusting timing parameters.
    
    Cc: Mario Limonciello <mario.limonciello@xxxxxxx>
    Cc: Alex Deucher <alexander.deucher@xxxxxxx>
    Cc: stable@xxxxxxxxxxxxxxx
    Acked-by: Stylon Wang <stylon.wang@xxxxxxx>
    Signed-off-by: Tom Chung <chiahsuan.chung@xxxxxxx>
    Reviewed-by: Wayne Lin <Wayne.Lin@xxxxxxx>
    Tested-by: Daniel Wheeler <daniel.wheeler@xxxxxxx>
    Signed-off-by: Alex Deucher <alexander.deucher@xxxxxxx>
    Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>

diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
index 51a3130f607e0..2cbd6949804f5 100644
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
@@ -8213,6 +8213,12 @@ static void amdgpu_dm_commit_planes(struct drm_atomic_state *state,
 		if (acrtc_state->abm_level != dm_old_crtc_state->abm_level)
 			bundle->stream_update.abm_level = &acrtc_state->abm_level;
 
+		mutex_lock(&dm->dc_lock);
+		if ((acrtc_state->update_type > UPDATE_TYPE_FAST) &&
+				acrtc_state->stream->link->psr_settings.psr_allow_active)
+			amdgpu_dm_psr_disable(acrtc_state->stream);
+		mutex_unlock(&dm->dc_lock);
+
 		/*
 		 * If FreeSync state on the stream has changed then we need to
 		 * re-adjust the min/max bounds now that DC doesn't handle this
@@ -8226,10 +8232,6 @@ static void amdgpu_dm_commit_planes(struct drm_atomic_state *state,
 			spin_unlock_irqrestore(&pcrtc->dev->event_lock, flags);
 		}
 		mutex_lock(&dm->dc_lock);
-		if ((acrtc_state->update_type > UPDATE_TYPE_FAST) &&
-				acrtc_state->stream->link->psr_settings.psr_allow_active)
-			amdgpu_dm_psr_disable(acrtc_state->stream);
-
 		update_planes_and_stream_adapter(dm->dc,
 					 acrtc_state->update_type,
 					 planes_count,



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