From: jsg <jsg@openbsd.org>
Date: Mon, 11 Dec 2023 05:04:45 +0000 (+0000)
Subject: drm/amd/display: Include udelay when waiting for INBOX0 ACK
X-Git-Url: http://artulab.com/gitweb/?a=commitdiff_plain;h=22b9dc1433fee75fd236168f0a876de295a12fd1;p=openbsd

drm/amd/display: Include udelay when waiting for INBOX0 ACK

From Alvin Lee
33ed892f0cdeb1350648cd3bfe8140aa9f792076 in linux-6.1.y/6.1.66
3c9ea68cb61bd7e5bd312c06a12adada74ff5805 in mainline linux
---

diff --git a/sys/dev/pci/drm/amd/display/dmub/src/dmub_srv.c b/sys/dev/pci/drm/amd/display/dmub/src/dmub_srv.c
index c3327875933..f58803de37c 100644
--- a/sys/dev/pci/drm/amd/display/dmub/src/dmub_srv.c
+++ b/sys/dev/pci/drm/amd/display/dmub/src/dmub_srv.c
@@ -964,6 +964,7 @@ enum dmub_status dmub_srv_wait_for_inbox0_ack(struct dmub_srv *dmub, uint32_t ti
 		ack = dmub->hw_funcs.read_inbox0_ack_register(dmub);
 		if (ack)
 			return DMUB_STATUS_OK;
+		udelay(1);
 	}
 	return DMUB_STATUS_TIMEOUT;
 }