From: Benoit Goby <benoit@android.com>
Date: Wed, 5 Jan 2011 02:59:42 +0000 (-0800)
Subject: usb: host: tegra: Fix enumeration after lp0
X-Git-Tag: firefly_0821_release~9833^2~74^2~2
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=7a2bd4d7ca0de4d7781db7eceff152b13af077b6;p=firefly-linux-kernel-4.4.55.git

usb: host: tegra: Fix enumeration after lp0

Fix enumeration when a device is plugged while the host is in lp0 state.

Change-Id: Idb491f347172daac8a5603ed098b422b15cc534e
Signed-off-by: Benoit Goby <benoit@android.com>
---

diff --git a/drivers/usb/host/ehci-tegra.c b/drivers/usb/host/ehci-tegra.c
index 0f83b5e368da..262bbb01228b 100644
--- a/drivers/usb/host/ehci-tegra.c
+++ b/drivers/usb/host/ehci-tegra.c
@@ -259,8 +259,12 @@ static int tegra_usb_resume(struct usb_hcd *hcd)
 	set_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags);
 	tegra_ehci_power_up(ehci_to_hcd(tegra->ehci));
 
-	if (!context->valid)
+	if (!context->valid) {
+		/* Wait for the phy to detect new devices
+		 * before we restart the controller */
+		msleep(10);
 		goto restart;
+	}
 
 	/* Restore register context */
 	writel(TEGRA_USB_USBMODE_HOST, &hw->reserved[19]);