From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751891AbaKQNPA (ORCPT ); Mon, 17 Nov 2014 08:15:00 -0500 Received: from mail-pa0-f46.google.com ([209.85.220.46]:61691 "EHLO mail-pa0-f46.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751138AbaKQNO6 (ORCPT ); Mon, 17 Nov 2014 08:14:58 -0500 From: Kever Yang To: Paul Zimmerman , Felipe Balbi Cc: Dinh Nguyen , romain.perier@gmail.com, Heiko Stuebner , 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 , Roy Li , Greg Kroah-Hartman , 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 Message-Id: <1416230077-17535-1-git-send-email-kever.yang@rock-chips.com> X-Mailer: git-send-email 1.9.1 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 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 Signed-off-by: Kever Yang --- 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