[PATCH] usb: dwc2: resume root hub when device detect with suspend state

[Kever Yang]

After we implement the bus_suspend/resume, auto suspend id enabled.
The root hub will be auto suspend if there is no device connected,
we need to resume the root hub when a device connect detect.

This patch tested on rk3288.

Signed-off-by: Roy Li <roy.li at rock-chips.com>
Signed-off-by: Kever Yang <kever.yang at rock-chips.com>
---

 drivers/usb/dwc2/hcd_intr.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/drivers/usb/dwc2/hcd_intr.c b/drivers/usb/dwc2/hcd_intr.c
index 551ba87..c8299fd 100644
--- a/drivers/usb/dwc2/hcd_intr.c
+++ b/drivers/usb/dwc2/hcd_intr.c
@@ -355,6 +355,13 @@ static void dwc2_port_intr(struct dwc2_hsotg *hsotg)
 		hprt0_modify |= HPRT0_CONNDET;
 
 		/*
+		 * Check if root hub is in suspend state
+		 * if root hub in suspend, resume it.
+		 */
+		if ((bus->root_hub) && (hcd->state == HC_STATE_SUSPENDED))
+			usb_hcd_resume_root_hub(hcd);
+
+		/*
 		 * The Hub driver asserts a reset when it sees port connect
 		 * status change flag
 		 */
-- 
1.9.1