[SeaBIOS] [PATCH] EHCI: increase CONNECT detection delay
Kevin O'Connor
kevin at koconnor.net
Wed Aug 1 03:00:05 CEST 2012
On Sun, Jul 29, 2012 at 09:51:14PM +0200, Sven Schnelle wrote:
> 1ms seems to short on my chromebook, increasing that
> to 5ms makes EHCI work.
Thanks. Why not go to 20ms - how about the below instead?
-Kevin
--- a/src/usb-ehci.c
+++ b/src/usb-ehci.c
@@ -82,7 +82,9 @@ ehci_hub_detect(struct usbhub_s *hub, u32 port)
writel(portreg, portsc);
msleep(EHCI_TIME_POSTPOWER);
} else {
- msleep(1); // XXX - time for connect to be detected.
+ // Port is already powered up, but we don't know how long it
+ // has been powered up, so wait the 20ms.
+ msleep(EHCI_TIME_POSTPOWER);
}
portsc = readl(portreg);
More information about the SeaBIOS
mailing list