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From a71750c83a6f1f2f7c22864bbb4e62af5e70c214 Mon Sep 17 00:00:00 2001
From: Tim Gover <tim.gover@raspberrypi.org>
Date: Fri, 22 Mar 2019 09:47:14 +0000
Subject: [PATCH] usb: xhci: Disable the XHCI 5 second timeout
If the VL805 EEPROM has not been programmed then boot will hang for five
seconds. The timeout seems to be arbitrary and is an unecessary
delay on the first boot. Remove the timeout.
This is common code and probably can't be upstreamed unless the timeout
can be configurable somehow or perhaps the XHCI driver can be skipped
on the first boot.
---
drivers/usb/host/xhci.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
--- a/drivers/usb/host/xhci.c
+++ b/drivers/usb/host/xhci.c
@@ -196,8 +196,9 @@ int xhci_reset(struct xhci_hcd *xhci)
if (xhci->quirks & XHCI_INTEL_HOST)
udelay(1000);
+ // Hack: reduce handshake timeout from 10s 0.5s due to unprogrammed vl805
ret = xhci_handshake(&xhci->op_regs->command,
- CMD_RESET, 0, 10 * 1000 * 1000);
+ CMD_RESET, 0, 500 * 1000);
if (ret)
return ret;
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