From: Shixiong Ou <oushixiong@xxxxxxxxxx>
In some causes, HPD signals will jitter when plugging in
or unplugging HDMI.
Rescheduling the hotplug work for a second when EDID may still be
readable but HDP is disconnected, and fixes this issue.
Signed-off-by: Shixiong Ou <oushixiong@xxxxxxxxxx>
---
drivers/gpu/drm/radeon/radeon_connectors.c | 10 ++++++++++
1 file changed, 10 insertions(+)
diff --git a/drivers/gpu/drm/radeon/radeon_connectors.c b/drivers/gpu/drm/radeon/radeon_connectors.c
index b84b58926106..cf0114ca59a4 100644
--- a/drivers/gpu/drm/radeon/radeon_connectors.c
+++ b/drivers/gpu/drm/radeon/radeon_connectors.c
@@ -1267,6 +1267,16 @@ radeon_dvi_detect(struct drm_connector *connector, bool force)
goto exit;
}
}
+
+ if (dret && radeon_connector->hpd.hpd != RADEON_HPD_NONE &&
+ !radeon_hpd_sense(rdev, radeon_connector->hpd.hpd) &&
+ connector->connector_type == DRM_MODE_CONNECTOR_HDMIA) {
+ DRM_DEBUG_KMS("EDID is readable when HPD disconnected\n");
+ schedule_delayed_work(&rdev->hotplug_work, msecs_to_jiffies(1000));
+ ret = connector_status_disconnected;
+ goto exit;
+ }
+
if (dret) {
radeon_connector->detected_by_load = false;
radeon_connector_free_edid(connector);
--
2.17.1
