From 8768ff66901775747d17aa97ef92840af0b2f0df Mon Sep 17 00:00:00 2001
From: Jani Nikula <jani.nikula@intel.com>
Date: Wed, 12 Jan 2022 13:03:18 +0200
Subject: drm/i915/mst: ack sink irq ESI for link status changes
Git-commit: b4a1c675d256bfa1d399490847d086b8b463b5d4
Patch-mainline: v5.18-rc1
References: jsc#PED-1166 jsc#PED-1168 jsc#PED-1170 jsc#PED-1218 jsc#PED-1220 jsc#PED-1222 jsc#PED-1223 jsc#PED-1225
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
Acked-by: Patrik Jakobsson <pjakobsson@suse.de>
---
drivers/gpu/drm/i915/display/intel_dp.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/drivers/gpu/drm/i915/display/intel_dp.c b/drivers/gpu/drm/i915/display/intel_dp.c
index 89327f23b886..0960e6e3be77 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);
--
2.38.1