From: William Wu <wulf@rock-chips.com>
Date: Fri, 11 Nov 2016 08:50:21 +0000 (+0800)
Subject: CHROMIUM: usb: dwc3: rockchip: Check for plug/unplug events on resume
X-Git-Tag: firefly_0821_release~1278
X-Git-Url: http://plrg.eecs.uci.edu/git/?p=firefly-linux-kernel-4.4.55.git;a=commitdiff_plain;h=0e7d2a179dd2945ef0f91db0ac24ba78781fb1cc

CHROMIUM: usb: dwc3: rockchip: Check for plug/unplug events on resume

Check on resume if the cable state has changed to detect devices
(un)plugged during suspend.

TEST=build and boot on rk3399 board. No USB device plugged. Set
system enter suspend. Wait for device to suspend. Plug USB device.
Wakeup system; Verify USB device is enumerated.

Change-Id: Iadbefe6737fa3ddfe2da1a66473f876411a4412a
Signed-off-by: William Wu <wulf@rock-chips.com>
Signed-off-by: Matthias Kaehlcke <mka@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/395528
Reviewed-by: Guenter Roeck <groeck@chromium.org>
---

diff --git a/drivers/usb/dwc3/dwc3-rockchip.c b/drivers/usb/dwc3/dwc3-rockchip.c
index 0488af0b29be..a0051c1d9b2c 100644
--- a/drivers/usb/dwc3/dwc3-rockchip.c
+++ b/drivers/usb/dwc3/dwc3-rockchip.c
@@ -543,6 +543,9 @@ static int dwc3_rockchip_resume(struct device *dev)
 
 	rockchip->suspended = false;
 
+	if (rockchip->edev)
+		schedule_work(&rockchip->otg_work);
+
 	return 0;
 }