[Intel-gfx] [PATCH 2/3] drm/i915/dp: Restrict link retrain workaround to external monitors

[Dhinakaran Pandiyan]

commit '3cf71bc9904d ("drm/i915: Re-apply "Perform link quality check,
unconditionally during long pulse"")' applies a work around for monitors
that don't signal link loss. Apply this only for external displays as
eDP features like PSR when active will have the link turned off and the
driver ends up retraining the link seeeing that link is not synchronized.

Cc: Lyude Paul <lyude at redhat.com>
Cc: Jan-Marek Glogowski <glogow at fbihome.de>
Cc: Ville Syrjälä <ville.syrjala at linux.intel.com>
Cc: Rodrigo Vivi <rodrigo.vivi at intel.com>
References: 3cf71bc9904d ("drm/i915: Re-apply "Perform link quality check, unconditionally during long pulse"")
Signed-off-by: Dhinakaran Pandiyan <dhinakaran.pandiyan at intel.com>
---
 drivers/gpu/drm/i915/intel_dp.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c
index befdaa076d8c..c59b2f78f41a 100644
--- a/drivers/gpu/drm/i915/intel_dp.c
+++ b/drivers/gpu/drm/i915/intel_dp.c
@@ -5072,7 +5072,9 @@ intel_dp_full_detect(struct intel_connector *connector,
 		 */
 		status = connector_status_disconnected;
 		goto out;
-	} else {
+	}
+
+	if (!intel_dp_is_edp(intel_dp)) {
 		/*
 		 * Check link status in case the link went out of
 		 * synchronization and the sink did not tell us.
-- 
2.17.1