drm/amd/display: Fix S3 topology change

Clean fake sink flag on resume if real sink connected.
Fixing S3 topology change problem like this:
1) x desktop with 1 or > displays
2) unplug display
3) suspend
4) replug same display
5) resume
without this change replugged display doesn't light up

Signed-off-by: Roman Li <[email protected]>
Reviewed-by: Sun peng Li <[email protected]>
Acked-by: Harry Wentland <[email protected]>
Reviewed-by: Andrey Grodzovsky <[email protected]>
Signed-off-by: Alex Deucher <[email protected]>

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 889ed24084e866bb846d9b6cc1f52a38e51cb5eb..009aaeb263e3a970b3e16b983a2486768138de32 100644 (file)
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
@@ -677,6 +677,10 @@ int amdgpu_dm_display_resume(struct amdgpu_device *adev)
 
                mutex_lock(&aconnector->hpd_lock);
                dc_link_detect(aconnector->dc_link, DETECT_REASON_HPD);
+
+               if (aconnector->fake_enable && aconnector->dc_link->local_sink)
+                       aconnector->fake_enable = false;
+
                aconnector->dc_sink = NULL;
                amdgpu_dm_update_connector_after_detect(aconnector);
                mutex_unlock(&aconnector->hpd_lock);