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From: Kever Yang <kever.yang@rock-chips.com>
To: Paul Zimmerman <paulz@synopsys.com>, Felipe Balbi <balbi@ti.com>
Cc: Dinh Nguyen <dinguyen@opensource.altera.com>,
	romain.perier@gmail.com, Heiko Stuebner <heiko@sntech.de>,
	dianders@chromium.org, sonnyrao@chromium.org,
	addy.ke@rock-chips.com, cf@rock-chips.com, wulf@rock-chips.com,
	huangtao@rock-chips.com, linux-rockchip@lists.infradead.org,
	Kever Yang <kever.yang@rock-chips.com>,
	Roy Li <roy.li@rock-chips.com>,
	Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
	linux-usb@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: [PATCH] usb: dwc2: resume root hub when device detect with suspend state
Date: Mon, 17 Nov 2014 21:14:37 +0800	[thread overview]
Message-ID: <1416230077-17535-1-git-send-email-kever.yang@rock-chips.com> (raw)

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@rock-chips.com>
Signed-off-by: Kever Yang <kever.yang@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


             reply	other threads:[~2014-11-17 13:15 UTC|newest]

Thread overview: 5+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2014-11-17 13:14 Kever Yang [this message]
2014-11-17 15:21 ` [PATCH] usb: dwc2: resume root hub when device detect with suspend state Kever Yang
2014-11-17 18:16 ` Sergei Shtylyov
2014-11-17 21:21 ` Julius Werner
2014-11-18  1:11   ` Kever Yang

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