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Date: Fri, 21 Jan 2022 12:17:39 +0800 From: Kai-Heng Feng <kai.heng.feng@...onical.com> To: Ricky WU <ricky_wu@...ltek.com> Cc: "arnd@...db.de" <arnd@...db.de>, "gregkh@...uxfoundation.org" <gregkh@...uxfoundation.org>, "ulf.hansson@...aro.org" <ulf.hansson@...aro.org>, "linux-pm@...r.kernel.org" <linux-pm@...r.kernel.org>, Christophe JAILLET <christophe.jaillet@...adoo.fr>, Yang Li <yang.lee@...ux.alibaba.com>, "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org> Subject: Re: [PATCH v2 2/4] misc: rtsx: Rework runtime power management flow On Fri, Jan 21, 2022 at 12:15 PM Ricky WU <ricky_wu@...ltek.com> wrote: > > > -----Original Message----- > > From: Kai-Heng Feng <kai.heng.feng@...onical.com> > > Sent: Friday, January 21, 2022 12:08 PM > > To: Ricky WU <ricky_wu@...ltek.com> > > Cc: arnd@...db.de; gregkh@...uxfoundation.org; ulf.hansson@...aro.org; > > linux-pm@...r.kernel.org; Christophe JAILLET > > <christophe.jaillet@...adoo.fr>; Yang Li <yang.lee@...ux.alibaba.com>; > > linux-kernel@...r.kernel.org > > Subject: Re: [PATCH v2 2/4] misc: rtsx: Rework runtime power management > > flow > > > > On Fri, Jan 21, 2022 at 11:57 AM Ricky WU <ricky_wu@...ltek.com> wrote: > > > > > > > -----Original Message----- > > > > From: Kai-Heng Feng <kai.heng.feng@...onical.com> > > > > Sent: Friday, January 21, 2022 9:41 AM > > > > To: arnd@...db.de; gregkh@...uxfoundation.org; > > > > ulf.hansson@...aro.org > > > > Cc: linux-pm@...r.kernel.org; Kai-Heng Feng > > > > <kai.heng.feng@...onical.com>; Ricky WU <ricky_wu@...ltek.com>; > > > > Christophe JAILLET <christophe.jaillet@...adoo.fr>; Yang Li > > > > <yang.lee@...ux.alibaba.com>; linux-kernel@...r.kernel.org > > > > Subject: [PATCH v2 2/4] misc: rtsx: Rework runtime power management > > > > flow > > > > > > > > Commit 5b4258f6721f ("misc: rtsx: rts5249 support runtime PM") uses > > > > "rtd3_work" and "idle_work" to manage it's own runtime PM state > > machine. > > > > > > > > When its child device, rtsx_pci_sdmmc, uses runtime PM refcount > > > > correctly, all the additional works can be managed by generic runtime PM > > helpers. > > > > > > > > So consolidate "idle_work" and "rtd3_work" into generic runtime idle > > > > callback and runtime suspend callback, respectively. > > > > > > > > > > This idle_work is not runtime_idle, this is for aspm setting Not only > > > for support RPM, so this idle_work can not be remove.... > > > > rtsx_pm_power_saving() is called inside rtsx_pci_runtime_idle(), when the > > usage refcount becomes zero, before runtime suspend routine. > > > > > > > > Our original Idle_work is a power saveing function, It is a delay_work > > > for 200 msec , If no work comes in 200 msec than go to idle_work to set > > power saveing setting..... > > > > Have you tested it locally? rtsx_pci_runtime_idle() really does the same thing. > > > > We are testing... > RTD3 is not available on all platforms.... > We use a values (rtd3_en) to judge rtd3 enable or not > > Aspm is for all platform but RTD3 is not Thanks! I get it now. Let me send v3 to address the issue. Kai-Heng > > > > > > > > > > Fixes: 5b4258f6721f ("misc: rtsx: rts5249 support runtime PM") > > > > Cc: Ricky WU <ricky_wu@...ltek.com> > > > > Signed-off-by: Kai-Heng Feng <kai.heng.feng@...onical.com> > > > > --- > > > > v2: > > > > - Remove unused idle_work and rtd3_work from rtsx_pcr. > > > > > > > > drivers/misc/cardreader/rtsx_pcr.c | 123 +++++++++++------------------ > > > > include/linux/rtsx_pci.h | 3 - > > > > 2 files changed, 44 insertions(+), 82 deletions(-) > > > > > > > > diff --git a/drivers/misc/cardreader/rtsx_pcr.c > > > > b/drivers/misc/cardreader/rtsx_pcr.c > > > > index 6ac509c1821c9..1dcf98b597569 100644 > > > > --- a/drivers/misc/cardreader/rtsx_pcr.c > > > > +++ b/drivers/misc/cardreader/rtsx_pcr.c > > > > @@ -152,20 +152,12 @@ void rtsx_pci_start_run(struct rtsx_pcr *pcr) > > > > if (pcr->remove_pci) > > > > return; > > > > > > > > - if (pcr->rtd3_en) > > > > - if (pcr->is_runtime_suspended) { > > > > - pm_runtime_get(&(pcr->pci->dev)); > > > > - pcr->is_runtime_suspended = false; > > > > - } > > > > - > > > > if (pcr->state != PDEV_STAT_RUN) { > > > > pcr->state = PDEV_STAT_RUN; > > > > if (pcr->ops->enable_auto_blink) > > > > pcr->ops->enable_auto_blink(pcr); > > > > rtsx_pm_full_on(pcr); > > > > } > > > > - > > > > - mod_delayed_work(system_wq, &pcr->idle_work, > > msecs_to_jiffies(200)); > > > > } > > > > EXPORT_SYMBOL_GPL(rtsx_pci_start_run); > > > > > > > > @@ -1094,40 +1086,6 @@ static void rtsx_pm_power_saving(struct > > > > rtsx_pcr > > > > *pcr) > > > > rtsx_comm_pm_power_saving(pcr); } > > > > > > > > -static void rtsx_pci_rtd3_work(struct work_struct *work) -{ > > > > - struct delayed_work *dwork = to_delayed_work(work); > > > > - struct rtsx_pcr *pcr = container_of(dwork, struct rtsx_pcr, > > rtd3_work); > > > > - > > > > - pcr_dbg(pcr, "--> %s\n", __func__); > > > > - if (!pcr->is_runtime_suspended) > > > > - pm_runtime_put(&(pcr->pci->dev)); > > > > -} > > > > - > > > > -static void rtsx_pci_idle_work(struct work_struct *work) -{ > > > > - struct delayed_work *dwork = to_delayed_work(work); > > > > - struct rtsx_pcr *pcr = container_of(dwork, struct rtsx_pcr, > > idle_work); > > > > - > > > > - pcr_dbg(pcr, "--> %s\n", __func__); > > > > - > > > > - mutex_lock(&pcr->pcr_mutex); > > > > - > > > > - pcr->state = PDEV_STAT_IDLE; > > > > - > > > > - if (pcr->ops->disable_auto_blink) > > > > - pcr->ops->disable_auto_blink(pcr); > > > > - if (pcr->ops->turn_off_led) > > > > - pcr->ops->turn_off_led(pcr); > > > > - > > > > - rtsx_pm_power_saving(pcr); > > > > - > > > > - mutex_unlock(&pcr->pcr_mutex); > > > > - > > > > - if (pcr->rtd3_en) > > > > - mod_delayed_work(system_wq, &pcr->rtd3_work, > > > > msecs_to_jiffies(10000)); > > > > -} > > > > - > > > > static void rtsx_base_force_power_down(struct rtsx_pcr *pcr, u8 > > > > pm_state) { > > > > /* Set relink_time to 0 */ > > > > @@ -1598,7 +1556,6 @@ static int rtsx_pci_probe(struct pci_dev *pcidev, > > > > pcr->card_inserted = 0; > > > > pcr->card_removed = 0; > > > > INIT_DELAYED_WORK(&pcr->carddet_work, rtsx_pci_card_detect); > > > > - INIT_DELAYED_WORK(&pcr->idle_work, rtsx_pci_idle_work); > > > > > > > > pcr->msi_en = msi_en; > > > > if (pcr->msi_en) { > > > > @@ -1623,20 +1580,16 @@ static int rtsx_pci_probe(struct pci_dev > > *pcidev, > > > > rtsx_pcr_cells[i].pdata_size = sizeof(*handle); > > > > } > > > > > > > > - if (pcr->rtd3_en) { > > > > - INIT_DELAYED_WORK(&pcr->rtd3_work, > > rtsx_pci_rtd3_work); > > > > - pm_runtime_allow(&pcidev->dev); > > > > - pm_runtime_enable(&pcidev->dev); > > > > - pcr->is_runtime_suspended = false; > > > > - } > > > > - > > > > > > > > ret = mfd_add_devices(&pcidev->dev, pcr->id, rtsx_pcr_cells, > > > > ARRAY_SIZE(rtsx_pcr_cells), NULL, 0, NULL); > > > > if (ret < 0) > > > > goto free_slots; > > > > > > > > - schedule_delayed_work(&pcr->idle_work, msecs_to_jiffies(200)); > > > > + if (pcr->rtd3_en) { > > > > + pm_runtime_allow(&pcidev->dev); > > > > + pm_runtime_put(&pcidev->dev); > > > > + } > > > > > > > > return 0; > > > > > > > > @@ -1668,10 +1621,11 @@ static void rtsx_pci_remove(struct pci_dev > > > > *pcidev) > > > > struct pcr_handle *handle = pci_get_drvdata(pcidev); > > > > struct rtsx_pcr *pcr = handle->pcr; > > > > > > > > - if (pcr->rtd3_en) > > > > - pm_runtime_get_noresume(&pcr->pci->dev); > > > > - > > > > pcr->remove_pci = true; > > > > + if (pcr->rtd3_en) { > > > > + pm_runtime_get_sync(&pcidev->dev); > > > > + pm_runtime_forbid(&pcidev->dev); > > > > + } > > > > > > > > /* Disable interrupts at the pcr level */ > > > > spin_lock_irq(&pcr->lock); > > > > @@ -1680,9 +1634,6 @@ static void rtsx_pci_remove(struct pci_dev > > *pcidev) > > > > spin_unlock_irq(&pcr->lock); > > > > > > > > cancel_delayed_work_sync(&pcr->carddet_work); > > > > - cancel_delayed_work_sync(&pcr->idle_work); > > > > - if (pcr->rtd3_en) > > > > - cancel_delayed_work_sync(&pcr->rtd3_work); > > > > > > > > mfd_remove_devices(&pcidev->dev); > > > > > > > > @@ -1700,11 +1651,6 @@ static void rtsx_pci_remove(struct pci_dev > > > > *pcidev) > > > > idr_remove(&rtsx_pci_idr, pcr->id); > > > > spin_unlock(&rtsx_pci_lock); > > > > > > > > - if (pcr->rtd3_en) { > > > > - pm_runtime_disable(&pcr->pci->dev); > > > > - pm_runtime_put_noidle(&pcr->pci->dev); > > > > - } > > > > - > > > > kfree(pcr->slots); > > > > kfree(pcr); > > > > kfree(handle); > > > > @@ -1726,7 +1672,6 @@ static int __maybe_unused > > > > rtsx_pci_suspend(struct device *dev_d) > > > > pcr = handle->pcr; > > > > > > > > cancel_delayed_work(&pcr->carddet_work); > > > > - cancel_delayed_work(&pcr->idle_work); > > > > > > > > mutex_lock(&pcr->pcr_mutex); > > > > > > > > @@ -1760,8 +1705,6 @@ static int __maybe_unused > > > > rtsx_pci_resume(struct device *dev_d) > > > > if (ret) > > > > goto out; > > > > > > > > - schedule_delayed_work(&pcr->idle_work, msecs_to_jiffies(200)); > > > > - > > > > out: > > > > mutex_unlock(&pcr->pcr_mutex); > > > > return ret; > > > > @@ -1786,6 +1729,32 @@ static void rtsx_pci_shutdown(struct pci_dev > > > > *pcidev) > > > > pci_disable_msi(pcr->pci); } > > > > > > > > +static int rtsx_pci_runtime_idle(struct device *device) { > > > > + struct pci_dev *pcidev = to_pci_dev(device); > > > > + struct pcr_handle *handle = pci_get_drvdata(pcidev); > > > > + struct rtsx_pcr *pcr = handle->pcr; > > > > + > > > > + dev_dbg(device, "--> %s\n", __func__); > > > > + > > > > + mutex_lock(&pcr->pcr_mutex); > > > > + > > > > + pcr->state = PDEV_STAT_IDLE; > > > > + > > > > + if (pcr->ops->disable_auto_blink) > > > > + pcr->ops->disable_auto_blink(pcr); > > > > + if (pcr->ops->turn_off_led) > > > > + pcr->ops->turn_off_led(pcr); > > > > + > > > > + rtsx_pm_power_saving(pcr); > > > > + > > > > + mutex_unlock(&pcr->pcr_mutex); > > > > + > > > > + pm_schedule_suspend(device, 5000); > > > > + > > > > + return -EBUSY; > > > > +} > > > > + > > > > static int rtsx_pci_runtime_suspend(struct device *device) { > > > > struct pci_dev *pcidev = to_pci_dev(device); @@ -1794,31 > > > > +1763,29 @@ static int rtsx_pci_runtime_suspend(struct device > > > > *device) > > > > > > > > handle = pci_get_drvdata(pcidev); > > > > pcr = handle->pcr; > > > > - dev_dbg(&(pcidev->dev), "--> %s\n", __func__); > > > > > > > > - cancel_delayed_work(&pcr->carddet_work); > > > > - cancel_delayed_work(&pcr->rtd3_work); > > > > - cancel_delayed_work(&pcr->idle_work); > > > > + if (!pcr->rtd3_en) > > > > + return -EBUSY; > > > > + > > > > + dev_dbg(device, "--> %s\n", __func__); > > > > + > > > > + cancel_delayed_work_sync(&pcr->carddet_work); > > > > > > > > mutex_lock(&pcr->pcr_mutex); > > > > rtsx_pci_power_off(pcr, HOST_ENTER_S3); > > > > > > > > mutex_unlock(&pcr->pcr_mutex); > > > > > > > > - pcr->is_runtime_suspended = true; > > > > - > > > > return 0; > > > > } > > > > > > > > static int rtsx_pci_runtime_resume(struct device *device) { > > > > struct pci_dev *pcidev = to_pci_dev(device); > > > > - struct pcr_handle *handle; > > > > - struct rtsx_pcr *pcr; > > > > + struct pcr_handle *handle = pci_get_drvdata(pcidev); > > > > + struct rtsx_pcr *pcr = handle->pcr; > > > > > > > > - handle = pci_get_drvdata(pcidev); > > > > - pcr = handle->pcr; > > > > - dev_dbg(&(pcidev->dev), "--> %s\n", __func__); > > > > + dev_dbg(device, "--> %s\n", __func__); > > > > > > > > mutex_lock(&pcr->pcr_mutex); > > > > > > > > @@ -1834,8 +1801,6 @@ static int rtsx_pci_runtime_resume(struct > > > > device > > > > *device) > > > > pcr->slots[RTSX_SD_CARD].p_dev); > > > > } > > > > > > > > - schedule_delayed_work(&pcr->idle_work, msecs_to_jiffies(200)); > > > > - > > > > mutex_unlock(&pcr->pcr_mutex); > > > > return 0; > > > > } > > > > @@ -1850,7 +1815,7 @@ static int rtsx_pci_runtime_resume(struct > > > > device > > > > *device) > > > > > > > > static const struct dev_pm_ops rtsx_pci_pm_ops = { > > > > SET_SYSTEM_SLEEP_PM_OPS(rtsx_pci_suspend, rtsx_pci_resume) > > > > - SET_RUNTIME_PM_OPS(rtsx_pci_runtime_suspend, > > > > rtsx_pci_runtime_resume, NULL) > > > > + SET_RUNTIME_PM_OPS(rtsx_pci_runtime_suspend, > > > > rtsx_pci_runtime_resume, > > > > +rtsx_pci_runtime_idle) > > > > }; > > > > > > > > static struct pci_driver rtsx_pci_driver = { diff --git > > > > a/include/linux/rtsx_pci.h b/include/linux/rtsx_pci.h index > > > > 4ab7bfc675f11..89b7d34e25b63 100644 > > > > --- a/include/linux/rtsx_pci.h > > > > +++ b/include/linux/rtsx_pci.h > > > > @@ -1201,8 +1201,6 @@ struct rtsx_pcr { > > > > unsigned int card_exist; > > > > > > > > struct delayed_work carddet_work; > > > > - struct delayed_work idle_work; > > > > - struct delayed_work rtd3_work; > > > > > > > > spinlock_t lock; > > > > struct mutex pcr_mutex; > > > > @@ -1212,7 +1210,6 @@ struct rtsx_pcr { > > > > unsigned int cur_clock; > > > > bool remove_pci; > > > > bool msi_en; > > > > - bool is_runtime_suspended; > > > > > > > > #define EXTRA_CAPS_SD_SDR50 (1 << 0) > > > > #define EXTRA_CAPS_SD_SDR104 (1 << 1) > > > > -- > > > > 2.33.1 > > > > > ------Please consider the environment before printing this e-mail.
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