From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-15.2 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER, INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,UNPARSEABLE_RELAY, URIBL_BLOCKED,USER_AGENT_SANE_2 autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id C4F36C433ED for ; Fri, 9 Apr 2021 08:45:26 +0000 (UTC) Received: from desiato.infradead.org (desiato.infradead.org [90.155.92.199]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 6B43161185 for ; Fri, 9 Apr 2021 08:45:26 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 6B43161185 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=mediatek.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=desiato.20200630; h=Sender:Content-Transfer-Encoding :Content-Type:List-Subscribe:List-Help:List-Post:List-Archive: List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To:Date:CC:To:From: Subject:Message-ID:Reply-To:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=xR/tJ1HIrjtapHLxeETt6E2YeE8haV+hqe08Z8Hfauw=; b=Cv2YbzyQNDTlgP/8bsI9zTCac cIbcYC2TG8cMgSi8XDEs9Nh/kjV3Bh9n+Ay+xiV01hyc5dbhxHm7UhgLH/oSaAkSUkOou74o1wLe9 ust7QJdZ9hMVIeYUbnFR1QpHxgVttKIIisFAg6RMGN948id7EpRdrGKn13ld8pusTQwTb3clj5EYB /YPGx6OWp8EuCRIr12PKIgfWqtoXGdS1684jzDBcSR0ynweZA5q/xVlwWX0RaN4srmk7McGFnJpMx RPViO6zxSOxVukfFphjf9IoFQgG5MtsFc/hHs9gJp/jW2JZ/w/GWjLdBBLDxdl2iIfuAySS9plAlt 5lQpyr8MA==; Received: from localhost ([::1] helo=desiato.infradead.org) by desiato.infradead.org with esmtp (Exim 4.94 #2 (Red Hat Linux)) id 1lUmjs-0005J8-7t; Fri, 09 Apr 2021 08:43:40 +0000 Received: from mailgw02.mediatek.com ([216.200.240.185]) by desiato.infradead.org with esmtps (Exim 4.94 #2 (Red Hat Linux)) id 1lUmjk-0005Gt-Hu; Fri, 09 Apr 2021 08:43:35 +0000 X-UUID: ba76a3ac973743d3924f6938e137f7e7-20210409 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=mediatek.com; s=dk; h=Content-Transfer-Encoding:MIME-Version:Content-Type:References:In-Reply-To:Date:CC:To:From:Subject:Message-ID; bh=LWR0YYJF62R73X/2PazKkQVUbwMvHOS/MQ9V7awNAws=; b=B/IYe5BxeZB+RaN6vk7LP2paPDef9IxtAnnv/pGluFjyxDFjXjhwTu6ffQkZQ7k8XlcJYRQpTaoxn0OgmYYKiubmVARzjz70nq1FNxTl7Feww7ZmK1MyZyQ1q3J5aZ4AI8jR1p8xLG/OPSGSA5dBDF5E8ic4D9dJvuepBZbyd/M=; X-UUID: ba76a3ac973743d3924f6938e137f7e7-20210409 Received: from mtkcas67.mediatek.inc [(172.29.193.45)] by mailgw02.mediatek.com (envelope-from ) (musrelay.mediatek.com ESMTP with TLSv1.2 ECDHE-RSA-AES256-SHA384 256/256) with ESMTP id 27882687; Fri, 09 Apr 2021 01:43:24 -0700 Received: from MTKMBS31N1.mediatek.inc (172.27.4.69) by MTKMBS62N1.mediatek.inc (172.29.193.41) with Microsoft SMTP Server (TLS) id 15.0.1497.2; Fri, 9 Apr 2021 01:43:22 -0700 Received: from MTKCAS32.mediatek.inc (172.27.4.184) by MTKMBS31N1.mediatek.inc (172.27.4.69) with Microsoft SMTP Server (TLS) id 15.0.1497.2; Fri, 9 Apr 2021 16:43:19 +0800 Received: from [10.17.3.153] (10.17.3.153) by MTKCAS32.mediatek.inc (172.27.4.170) with Microsoft SMTP Server id 15.0.1497.2 via Frontend Transport; Fri, 9 Apr 2021 16:43:19 +0800 Message-ID: <1617957799.12105.31.camel@mhfsdcap03> Subject: Re: [PATCH 1/6] PM: runtime: enable wake irq after runtime_suspend hook called From: Chunfeng Yun To: Ikjoon Jang CC: Rob Herring , Mathias Nyman , Greg Kroah-Hartman , Matthias Brugger , "Rafael J. Wysocki" , Len Brown , Pavel Machek , , "moderated list:ARM/Mediatek SoC support" , "moderated list:ARM/Mediatek SoC support" , "open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS" , open list , , Tony Lindgren , Tianping Fang , Eddie Hung , Nicolas Boichat Date: Fri, 9 Apr 2021 16:43:19 +0800 In-Reply-To: References: <1617874514-12282-1-git-send-email-chunfeng.yun@mediatek.com> X-Mailer: Evolution 3.10.4-0ubuntu2 MIME-Version: 1.0 X-TM-SNTS-SMTP: 7CFDA8CB831F2DE86455E79C381B3FB824379DAED8D4FA5615EB49D1A8F27F8D2000:8 X-MTK: N X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20210409_094333_188960_75761D33 X-CRM114-Status: GOOD ( 24.23 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org On Fri, 2021-04-09 at 13:32 +0800, Ikjoon Jang wrote: > Hi Chunfeng, > > On Thu, Apr 8, 2021 at 5:35 PM Chunfeng Yun wrote: > > > > When the dedicated wake irq is level trigger, enable it before > > calling runtime_suspend, will trigger an interrupt. > > > > e.g. > > for a low level trigger type, it's low level at running time (0), > > and becomes high level when enters suspend (runtime_suspend (1) is > > called), a wakeup signal at (2) make it become low level, wake irq > > will be triggered. > > > > ------------------ > > | ^ ^| > > ---------------- | | -------------- > > |<---(0)--->|<--(1)--| (3) (2) (4) > > > > Can't we just use a falling edge type for this irq line? I'll try it, but the original code still doesn't process above mentioned case. > > > if we enable the wake irq before calling runtime_suspend during (0), > > an interrupt will arise, it causes resume immediately; > > enable wake irq after calling runtime_suspend, e.g. at (3) or (4), > > will works. > > > > This patch seems no side effect on edge trigger wake irq. > > > > Signed-off-by: Chunfeng Yun > > --- > > drivers/base/power/runtime.c | 5 ++--- > > 1 file changed, 2 insertions(+), 3 deletions(-) > > > > diff --git a/drivers/base/power/runtime.c b/drivers/base/power/runtime.c > > index a46a7e30881b..796739a015a5 100644 > > --- a/drivers/base/power/runtime.c > > +++ b/drivers/base/power/runtime.c > > @@ -619,12 +619,12 @@ static int rpm_suspend(struct device *dev, int rpmflags) > > __update_runtime_status(dev, RPM_SUSPENDING); > > > > callback = RPM_GET_CALLBACK(dev, runtime_suspend); > > - > > - dev_pm_enable_wake_irq_check(dev, true); > > retval = rpm_callback(callback, dev); > > if (retval) > > goto fail; > > > > + dev_pm_enable_wake_irq_check(dev, true); > > + > > no_callback: > > __update_runtime_status(dev, RPM_SUSPENDED); > > pm_runtime_deactivate_timer(dev); > > @@ -659,7 +659,6 @@ static int rpm_suspend(struct device *dev, int rpmflags) > > return retval; > > > > fail: > > - dev_pm_disable_wake_irq_check(dev); > > __update_runtime_status(dev, RPM_ACTIVE); > > dev->power.deferred_resume = false; > > wake_up_all(&dev->power.wait_queue); > > -- > > 2.18.0 > > _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel