From: jsg <jsg@openbsd.org>
Date: Mon, 9 Sep 2024 09:51:03 +0000 (+0000)
Subject: drm/amd/display: Don't use fsleep for PSR exit waits on dmub replay
X-Git-Url: http://artulab.com/gitweb/?a=commitdiff_plain;h=c4e3d4392fde4a202499e9fa449cc9a72a641961;p=openbsd

drm/amd/display: Don't use fsleep for PSR exit waits on dmub replay

From Nicholas Kazlauskas
da696cbb47941c40b01cc10ea5504dc5a4ebac6e in linux-6.6.y/6.6.50
b5236da757adc75d7e52c69bdc233d29249a0d0c in mainline linux
---

diff --git a/sys/dev/pci/drm/amd/display/dc/dce/dmub_replay.c b/sys/dev/pci/drm/amd/display/dc/dce/dmub_replay.c
index 28149e53c2a..eeb5b8247c9 100644
--- a/sys/dev/pci/drm/amd/display/dc/dce/dmub_replay.c
+++ b/sys/dev/pci/drm/amd/display/dc/dce/dmub_replay.c
@@ -102,7 +102,8 @@ static void dmub_replay_enable(struct dmub_replay *dmub, bool enable, bool wait,
 					break;
 			}
 
-			fsleep(500);
+			/* must *not* be fsleep - this can be called from high irq levels */
+			udelay(500);
 		}
 
 		/* assert if max retry hit */