From: jsg <jsg@openbsd.org>
Date: Thu, 18 Aug 2022 01:02:22 +0000 (+0000)
Subject: drm/dp/mst: Read the extended DPCD capabilities during system resume
X-Git-Url: http://artulab.com/gitweb/?a=commitdiff_plain;h=d1f83aa5b92744c2579083654527246a8489fb0f;p=openbsd

drm/dp/mst: Read the extended DPCD capabilities during system resume

From Imre Deak
4a54c13786c5a596b4e072b36e245029e11a565c in linux 5.15.y/5.15.61
7a710a8bc909313951eb9252d8419924c771d7c2 in mainline linux
---

diff --git a/sys/dev/pci/drm/drm_dp_mst_topology.c b/sys/dev/pci/drm/drm_dp_mst_topology.c
index 3d7002f372d..ddae7f34c6b 100644
--- a/sys/dev/pci/drm/drm_dp_mst_topology.c
+++ b/sys/dev/pci/drm/drm_dp_mst_topology.c
@@ -3870,9 +3870,7 @@ int drm_dp_mst_topology_mgr_resume(struct drm_dp_mst_topology_mgr *mgr,
 	if (!mgr->mst_primary)
 		goto out_fail;
 
-	ret = drm_dp_dpcd_read(mgr->aux, DP_DPCD_REV, mgr->dpcd,
-			       DP_RECEIVER_CAP_SIZE);
-	if (ret != DP_RECEIVER_CAP_SIZE) {
+	if (drm_dp_read_dpcd_caps(mgr->aux, mgr->dpcd) < 0) {
 		drm_dbg_kms(mgr->dev, "dpcd read failed - undocked during suspend?\n");
 		goto out_fail;
 	}
@@ -4904,8 +4902,7 @@ void drm_dp_mst_dump_topology(struct seq_file *m,
 		u8 buf[DP_PAYLOAD_TABLE_SIZE];
 		int ret;
 
-		ret = drm_dp_dpcd_read(mgr->aux, DP_DPCD_REV, buf, DP_RECEIVER_CAP_SIZE);
-		if (ret) {
+		if (drm_dp_read_dpcd_caps(mgr->aux, buf) < 0) {
 			seq_printf(m, "dpcd read failed\n");
 			goto out;
 		}