From: Jani Nikula <jani.nikula@intel.com>
Date: Wed, 12 Jan 2022 11:03:18 +0000 (+0200)
Subject: drm/i915/mst: ack sink irq ESI for link status changes
X-Git-Tag: v5.18-rc1~134^2~19^2~77
X-Git-Url: http://xenbits.xensource.com/gitweb?a=commitdiff_plain;h=b4a1c675d256bfa1d399490847d086b8b463b5d4;p=people%2Fjgross%2Flinux.git

drm/i915/mst: ack sink irq ESI for link status changes

Only specific event status indicators caused the link status to be
acked. Be sure to ack the link status change event.

Arguably we should track which bits to actually clear in ESI instead of
the wholesale approach.

Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Reviewed-by: Uma Shankar <uma.shankar@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20220112110319.1172110-6-jani.nikula@intel.com
---

diff --git a/drivers/gpu/drm/i915/display/intel_dp.c b/drivers/gpu/drm/i915/display/intel_dp.c
index d8a0ba3a14b7..95e9f7220ab8 100644
--- a/drivers/gpu/drm/i915/display/intel_dp.c
+++ b/drivers/gpu/drm/i915/display/intel_dp.c
@@ -3699,6 +3699,7 @@ intel_dp_check_mst_status(struct intel_dp *intel_dp)
 		    esi[3] & LINK_STATUS_CHANGED) {
 			if (!intel_dp_mst_link_status(intel_dp))
 				link_ok = false;
+			handled = true;
 		}
 
 		intel_dp_mst_hpd_irq(intel_dp, esi, &handled);