From: kettenis <kettenis@openbsd.org>
Date: Mon, 5 Feb 2024 10:45:47 +0000 (+0000)
Subject: Add a 1ms delay before starting the MHI channels.  This is a hack; we're
X-Git-Url: http://artulab.com/gitweb/?a=commitdiff_plain;h=43134bb22b62faacd73bc97a29a936e7291f28b1;p=openbsd

Add a 1ms delay before starting the MHI channels.  This is a hack; we're
probably not waiting iproperly for some sort of firmware state transition.
But this gets us going on the x13s.

ok stsp@, phessler@
---

diff --git a/sys/dev/pci/if_qwx_pci.c b/sys/dev/pci/if_qwx_pci.c
index 6b7310d21ad..d307b553cec 100644
--- a/sys/dev/pci/if_qwx_pci.c
+++ b/sys/dev/pci/if_qwx_pci.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: if_qwx_pci.c,v 1.5 2024/02/03 20:07:19 kettenis Exp $	*/
+/*	$OpenBSD: if_qwx_pci.c,v 1.6 2024/02/05 10:45:47 kettenis Exp $	*/
 
 /*
  * Copyright 2023 Stefan Sperling <stsp@openbsd.org>
@@ -3180,6 +3180,9 @@ qwx_mhi_ready_state_transition(struct qwx_pci_softc *psc)
 void
 qwx_mhi_ee_amss_state_transition(struct qwx_pci_softc *psc)
 {
+	/* XXX without this delay starting the channels may fail */
+	delay(1000);
+
 	qwx_mhi_start_channels(psc);
 }