[PATCH 06/21] drm/amd/display: Clear edid when unplug mst connector

[Solomon Chiu]

From: Wayne Lin <Wayne.Lin at amd.com>

[Why]
When unplug one sst monitor from a mst hub and plug in the same
port with another sst monitor, we don't read the corresponding
edid. That's because we detect there is already an edid stored in
aconnector->edid which is a stale one.

[How]
Clean up aconnector->edid when unplug mst connector.

Reviewed-by: Hersen Wu <hersen.wu at amd.com>
Acked-by: Solomon Chiu <solomon.chiu at amd.com>
Signed-off-by: Wayne Lin <Wayne.Lin at amd.com>
---
 drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_mst_types.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_mst_types.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_mst_types.c
index ee5d6fa34a6b..8237029cedf5 100644
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_mst_types.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_mst_types.c
@@ -160,6 +160,7 @@ amdgpu_dm_mst_connector_early_unregister(struct drm_connector *connector)
 
 		dc_sink_release(dc_sink);
 		aconnector->dc_sink = NULL;
+		aconnector->edid = NULL;
 	}
 	drm_modeset_unlock(&root->mst_mgr.base.lock);
 }
@@ -411,6 +412,7 @@ dm_dp_mst_detect(struct drm_connector *connector,
 
 		dc_sink_release(aconnector->dc_sink);
 		aconnector->dc_sink = NULL;
+		aconnector->edid = NULL;
 	}
 
 	return connection_status;
-- 
2.25.1