From patchwork Fri Sep 24 02:37:45 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Chunfeng Yun X-Patchwork-Id: 12513893 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=-16.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,UNPARSEABLE_RELAY,USER_AGENT_GIT 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 5B531C433FE for ; Fri, 24 Sep 2021 02:37:54 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 34C1E6125F for ; Fri, 24 Sep 2021 02:37:54 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S243926AbhIXCjZ (ORCPT ); Thu, 23 Sep 2021 22:39:25 -0400 Received: from mailgw02.mediatek.com ([210.61.82.184]:56252 "EHLO mailgw02.mediatek.com" rhost-flags-OK-FAIL-OK-FAIL) by vger.kernel.org with ESMTP id S232976AbhIXCjZ (ORCPT ); Thu, 23 Sep 2021 22:39:25 -0400 X-UUID: 28acf20c0a5445578d9935b89ef135da-20210924 X-UUID: 28acf20c0a5445578d9935b89ef135da-20210924 Received: from mtkmbs10n1.mediatek.inc [(172.21.101.34)] by mailgw02.mediatek.com (envelope-from ) (Generic MTA with TLSv1.2 ECDHE-RSA-AES256-GCM-SHA384 256/256) with ESMTP id 665185749; Fri, 24 Sep 2021 10:37:49 +0800 Received: from mtkcas07.mediatek.inc (172.21.101.84) by mtkmbs07n2.mediatek.inc (172.21.101.141) with Microsoft SMTP Server (TLS) id 15.0.1497.2; Fri, 24 Sep 2021 10:37:48 +0800 Received: from MTKCAS06.mediatek.inc (172.21.101.30) by mtkcas07.mediatek.inc (172.21.101.84) with Microsoft SMTP Server (TLS) id 15.0.1497.2; Fri, 24 Sep 2021 10:37:48 +0800 Received: from localhost.localdomain (10.17.3.154) by MTKCAS06.mediatek.inc (172.21.101.73) with Microsoft SMTP Server id 15.0.1497.2 via Frontend Transport; Fri, 24 Sep 2021 10:37:47 +0800 From: Chunfeng Yun To: "Rafael J . Wysocki" CC: Len Brown , Pavel Machek , "Greg Kroah-Hartman" , Chunfeng Yun , Mathias Nyman , Matthias Brugger , , , , , , "Rafael J . Wysocki" Subject: [PATCH RESEND v3 1/2] PM / wakeirq: support enabling wake-up irq after runtime_suspend called Date: Fri, 24 Sep 2021 10:37:45 +0800 Message-ID: <20210924023746.22423-1-chunfeng.yun@mediatek.com> X-Mailer: git-send-email 2.25.1 MIME-Version: 1.0 X-MTK: N Precedence: bulk List-ID: X-Mailing-List: linux-usb@vger.kernel.org When the dedicated wake-irq is level trigger, and it uses the consumer's sleep status as the wakeup source, that means if the consumer is not in sleep state, the wake-irq will be triggered when enable it; For this case, need enable the wake-irq after invoking the consumer's runtime_suspend() which make the consumer enter sleep state. e.g. Assume the wake-irq is a low level trigger type, and the wakeup signal comes from the sleep status of consumer. The wakeup signal is low level at running time (0), and becomes high level when the consumer enters sleep state (runtime_suspend (1) is called), a wakeup event at (2) make the consumer exit sleep state, then the wakeup signal also becomes low level. ------------------ | ^ ^| ---------------- | | -------------- |<---(0)--->|<--(1)--| (3) (2) (4) if enable the wake-irq before calling runtime_suspend during (0), an interrupt will arise, it causes resume immediately; it works if enable wake-irq ( e.g. at (3) or (4)) after calling runtime_suspend. This patch introduces a new status WAKE_IRQ_DEDICATED_LATE_ENABLED to optionally support enabling wake-irq after calling runtime_suspend(). Suggested-by: Rafael J. Wysocki Signed-off-by: Chunfeng Yun --- v3: add new status suggested by Rafael v2: add more commit message Use the falling edge trigger interrupt suggested by Ikjoon [1], it works well at firstly when only use this related wakeup source, but encounter issues if use other wakeup sources to wakeup platform as below steps: 1. use another wakeup source to wake up the suspended system; 2. the consumer's resume() will be called, and exits sleep state; 3. the consumer's wakeup signal will fall into low level, due to currently the wakeup irq is disabled, the wake-irq is pending; 4. the consumer tries to enter runtime suspend, but there is a pending wakeup irq, so will resume again, this will repeat endlessly. Send out the patch again for further discussion. [1]: https://patchwork.kernel.org/patch/12190407 --- drivers/base/power/power.h | 7 ++++-- drivers/base/power/runtime.c | 6 +++-- drivers/base/power/wakeirq.c | 49 +++++++++++++++++++++++++++++++++--- include/linux/pm_wakeirq.h | 5 ++++ 4 files changed, 60 insertions(+), 7 deletions(-) diff --git a/drivers/base/power/power.h b/drivers/base/power/power.h index 54292cdd7808..2d5dfc886f0b 100644 --- a/drivers/base/power/power.h +++ b/drivers/base/power/power.h @@ -25,8 +25,10 @@ extern u64 pm_runtime_active_time(struct device *dev); #define WAKE_IRQ_DEDICATED_ALLOCATED BIT(0) #define WAKE_IRQ_DEDICATED_MANAGED BIT(1) +#define WAKE_IRQ_DEDICATED_LATE_ENABLED BIT(2) #define WAKE_IRQ_DEDICATED_MASK (WAKE_IRQ_DEDICATED_ALLOCATED | \ - WAKE_IRQ_DEDICATED_MANAGED) + WAKE_IRQ_DEDICATED_MANAGED | \ + WAKE_IRQ_DEDICATED_LATE_ENABLED) struct wake_irq { struct device *dev; @@ -39,7 +41,8 @@ extern void dev_pm_arm_wake_irq(struct wake_irq *wirq); extern void dev_pm_disarm_wake_irq(struct wake_irq *wirq); extern void dev_pm_enable_wake_irq_check(struct device *dev, bool can_change_status); -extern void dev_pm_disable_wake_irq_check(struct device *dev); +extern void dev_pm_disable_wake_irq_check(struct device *dev, bool skip_enable_late); +extern void dev_pm_enable_wake_irq_complete(struct device *dev); #ifdef CONFIG_PM_SLEEP diff --git a/drivers/base/power/runtime.c b/drivers/base/power/runtime.c index ec94049442b9..e8b807cd7010 100644 --- a/drivers/base/power/runtime.c +++ b/drivers/base/power/runtime.c @@ -645,6 +645,8 @@ static int rpm_suspend(struct device *dev, int rpmflags) if (retval) goto fail; + dev_pm_enable_wake_irq_complete(dev); + no_callback: __update_runtime_status(dev, RPM_SUSPENDED); pm_runtime_deactivate_timer(dev); @@ -690,7 +692,7 @@ static int rpm_suspend(struct device *dev, int rpmflags) return retval; fail: - dev_pm_disable_wake_irq_check(dev); + dev_pm_disable_wake_irq_check(dev, false); __update_runtime_status(dev, RPM_ACTIVE); dev->power.deferred_resume = false; wake_up_all(&dev->power.wait_queue); @@ -873,7 +875,7 @@ static int rpm_resume(struct device *dev, int rpmflags) callback = RPM_GET_CALLBACK(dev, runtime_resume); - dev_pm_disable_wake_irq_check(dev); + dev_pm_disable_wake_irq_check(dev, true); retval = rpm_callback(callback, dev); if (retval) { __update_runtime_status(dev, RPM_SUSPENDED); diff --git a/drivers/base/power/wakeirq.c b/drivers/base/power/wakeirq.c index b91a3a9bf9f6..1acf785ebdcd 100644 --- a/drivers/base/power/wakeirq.c +++ b/drivers/base/power/wakeirq.c @@ -212,6 +212,24 @@ int dev_pm_set_dedicated_wake_irq(struct device *dev, int irq) } EXPORT_SYMBOL_GPL(dev_pm_set_dedicated_wake_irq); +/** + * dev_pm_wake_irq_set_late_enabled_status - set status WAKE_IRQ_DEDICATED_LATE_ENABLED + * @dev: Device + * + * Set the status of WAKE_IRQ_DEDICATED_LATE_ENABLED to tell rpm_suspend() + * to enable dedicated wake-up interrupt after invoking the runtime_suspend(), + * + * Should be called after setting dedicated wake-up interrupt. + */ +void dev_pm_wake_irq_set_late_enabled_status(struct device *dev) +{ + struct wake_irq *wirq = dev->power.wakeirq; + + if (wirq && (wirq->status & WAKE_IRQ_DEDICATED_ALLOCATED)) + wirq->status |= WAKE_IRQ_DEDICATED_LATE_ENABLED; +} +EXPORT_SYMBOL_GPL(dev_pm_wake_irq_set_late_enabled_status); + /** * dev_pm_enable_wake_irq - Enable device wake-up interrupt * @dev: Device @@ -282,27 +300,52 @@ void dev_pm_enable_wake_irq_check(struct device *dev, return; enable: - enable_irq(wirq->irq); + if (!can_change_status || !(wirq->status & WAKE_IRQ_DEDICATED_LATE_ENABLED)) + enable_irq(wirq->irq); } /** * dev_pm_disable_wake_irq_check - Checks and disables wake-up interrupt * @dev: Device + * @skip_late_enabled_status: skip checking WAKE_IRQ_DEDICATED_LATE_ENABLED * * Disables wake-up interrupt conditionally based on status. * Should be only called from rpm_suspend() and rpm_resume() path. */ -void dev_pm_disable_wake_irq_check(struct device *dev) +void dev_pm_disable_wake_irq_check(struct device *dev, bool skip_late_enabled_status) { struct wake_irq *wirq = dev->power.wakeirq; if (!wirq || !(wirq->status & WAKE_IRQ_DEDICATED_MASK)) return; - if (wirq->status & WAKE_IRQ_DEDICATED_MANAGED) + if (wirq->status & WAKE_IRQ_DEDICATED_MANAGED && + (skip_late_enabled_status || + !(wirq->status & WAKE_IRQ_DEDICATED_LATE_ENABLED))) disable_irq_nosync(wirq->irq); } +/** + * dev_pm_enable_wake_irq_complete - enable wake irq based on status + * @dev: Device + * + * Enable wake-up interrupt conditionally based on status, mainly for + * enabling wake-up interrupt after runtime_suspend() is called. + * + * Should be only called from rpm_suspend() path. + */ +void dev_pm_enable_wake_irq_complete(struct device *dev) +{ + struct wake_irq *wirq = dev->power.wakeirq; + + if (!wirq || !(wirq->status & WAKE_IRQ_DEDICATED_MASK)) + return; + + if (wirq->status & WAKE_IRQ_DEDICATED_MANAGED && + wirq->status & WAKE_IRQ_DEDICATED_LATE_ENABLED) + enable_irq(wirq->irq); +} + /** * dev_pm_arm_wake_irq - Arm device wake-up * @wirq: Device wake-up interrupt diff --git a/include/linux/pm_wakeirq.h b/include/linux/pm_wakeirq.h index cd5b62db9084..92f814d583f8 100644 --- a/include/linux/pm_wakeirq.h +++ b/include/linux/pm_wakeirq.h @@ -22,6 +22,7 @@ extern int dev_pm_set_dedicated_wake_irq(struct device *dev, extern void dev_pm_clear_wake_irq(struct device *dev); extern void dev_pm_enable_wake_irq(struct device *dev); extern void dev_pm_disable_wake_irq(struct device *dev); +extern void dev_pm_wake_irq_set_late_enabled_status(struct device *dev); #else /* !CONFIG_PM */ @@ -47,5 +48,9 @@ static inline void dev_pm_disable_wake_irq(struct device *dev) { } +static inline void dev_pm_wake_irq_set_late_enabled_status(struct device *dev) +{ +} + #endif /* CONFIG_PM */ #endif /* _LINUX_PM_WAKEIRQ_H */ From patchwork Fri Sep 24 02:37:46 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Chunfeng Yun X-Patchwork-Id: 12513895 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=-16.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,UNPARSEABLE_RELAY,USER_AGENT_GIT 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 E7F2CC433F5 for ; Fri, 24 Sep 2021 02:37:59 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id D01196105A for ; Fri, 24 Sep 2021 02:37:59 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S243939AbhIXCj2 (ORCPT ); Thu, 23 Sep 2021 22:39:28 -0400 Received: from mailgw02.mediatek.com ([210.61.82.184]:56326 "EHLO mailgw02.mediatek.com" rhost-flags-OK-FAIL-OK-FAIL) by vger.kernel.org with ESMTP id S243935AbhIXCj1 (ORCPT ); Thu, 23 Sep 2021 22:39:27 -0400 X-UUID: fb5e923c706d406bb4df0276101afea6-20210924 X-UUID: fb5e923c706d406bb4df0276101afea6-20210924 Received: from mtkexhb01.mediatek.inc [(172.21.101.102)] by mailgw02.mediatek.com (envelope-from ) (Generic MTA with TLSv1.2 ECDHE-RSA-AES256-SHA384 256/256) with ESMTP id 1778508314; Fri, 24 Sep 2021 10:37:50 +0800 Received: from MTKCAS06.mediatek.inc (172.21.101.30) by mtkmbs07n1.mediatek.inc (172.21.101.16) with Microsoft SMTP Server (TLS) id 15.0.1497.2; Fri, 24 Sep 2021 10:37:49 +0800 Received: from localhost.localdomain (10.17.3.154) by MTKCAS06.mediatek.inc (172.21.101.73) with Microsoft SMTP Server id 15.0.1497.2 via Frontend Transport; Fri, 24 Sep 2021 10:37:48 +0800 From: Chunfeng Yun To: "Rafael J . Wysocki" CC: Len Brown , Pavel Machek , Greg Kroah-Hartman , Chunfeng Yun , Mathias Nyman , Matthias Brugger , , , , , Subject: [PATCH RESEND v3 2/2] usb: xhci-mtk: enable wake-up interrupt after runtime_suspend called Date: Fri, 24 Sep 2021 10:37:46 +0800 Message-ID: <20210924023746.22423-2-chunfeng.yun@mediatek.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20210924023746.22423-1-chunfeng.yun@mediatek.com> References: <20210924023746.22423-1-chunfeng.yun@mediatek.com> MIME-Version: 1.0 X-MTK: N Precedence: bulk List-ID: X-Mailing-List: linux-usb@vger.kernel.org Use new function dev_pm_wake_irq_set_late_enabled_status() to enable dedicated wake-up interrupt after xhci_mtk_runtime_suspend() is called. Signed-off-by: Chunfeng Yun --- v3: new patch --- drivers/usb/host/xhci-mtk.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/usb/host/xhci-mtk.c b/drivers/usb/host/xhci-mtk.c index c53f6f276d5c..6c1d898986f2 100644 --- a/drivers/usb/host/xhci-mtk.c +++ b/drivers/usb/host/xhci-mtk.c @@ -607,6 +607,7 @@ static int xhci_mtk_probe(struct platform_device *pdev) dev_err(dev, "set wakeup irq %d failed\n", wakeup_irq); goto dealloc_usb3_hcd; } + dev_pm_wake_irq_set_late_enabled_status(dev); dev_info(dev, "wakeup irq %d\n", wakeup_irq); }