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Message-ID: <2563367.LhaMUqlW8y@aspire.rjw.lan>
Date: Wed, 28 Jun 2017 00:46:33 +0200
From: "Rafael J. Wysocki" <rjw@...ysocki.net>
To: Mikko Perttunen <mperttunen@...dia.com>, ulf.hansson@...aro.org
Cc: khilman@...nel.org, linux-pm@...r.kernel.org,
linux-kernel@...r.kernel.org, cyndis@...si.fi
Subject: Re: [PATCH v3] PM / Domains: Call driver's noirq callbacks
On Thursday, June 22, 2017 10:18:33 AM Mikko Perttunen wrote:
> Currently genpd installs its own noirq callbacks, but never calls down
> to the driver's corresponding callbacks. Add these calls.
>
> Signed-off-by: Mikko Perttunen <mperttunen@...dia.com>
Ulf?
> ---
> v3:
> - Factored out common code in pm_genpd_{suspend,poweroff}_noirq
> - Added pm_generic_* calls to rest of callbacks
>
> drivers/base/power/domain.c | 68 +++++++++++++++++++++++++++++++++++++++------
> 1 file changed, 59 insertions(+), 9 deletions(-)
>
> diff --git a/drivers/base/power/domain.c b/drivers/base/power/domain.c
> index d3f1d96f75e9..248c5f79f588 100644
> --- a/drivers/base/power/domain.c
> +++ b/drivers/base/power/domain.c
> @@ -899,19 +899,19 @@ static int pm_genpd_prepare(struct device *dev)
> }
>
> /**
> - * pm_genpd_suspend_noirq - Completion of suspend of device in an I/O PM domain.
> + * genpd_finish_suspend - Completion of suspend or hibernation of device in an
> + * I/O pm domain.
> * @dev: Device to suspend.
> + * @poweroff: Specifies if this is a poweroff_noirq or suspend_noirq callback.
> *
> * Stop the device and remove power from the domain if all devices in it have
> * been stopped.
> */
> -static int pm_genpd_suspend_noirq(struct device *dev)
> +static int genpd_finish_suspend(struct device *dev, bool poweroff)
> {
> struct generic_pm_domain *genpd;
> int ret;
>
> - dev_dbg(dev, "%s()\n", __func__);
> -
> genpd = dev_to_genpd(dev);
> if (IS_ERR(genpd))
> return -EINVAL;
> @@ -919,6 +919,13 @@ static int pm_genpd_suspend_noirq(struct device *dev)
> if (dev->power.wakeup_path && genpd_dev_active_wakeup(genpd, dev))
> return 0;
>
> + if (poweroff)
> + ret = pm_generic_poweroff_noirq(dev);
> + else
> + ret = pm_generic_suspend_noirq(dev);
> + if (ret)
> + return ret;
> +
> if (genpd->dev_ops.stop && genpd->dev_ops.start) {
> ret = pm_runtime_force_suspend(dev);
> if (ret)
> @@ -934,6 +941,20 @@ static int pm_genpd_suspend_noirq(struct device *dev)
> }
>
> /**
> + * pm_genpd_suspend_noirq - Completion of suspend of device in an I/O PM domain.
> + * @dev: Device to suspend.
> + *
> + * Stop the device and remove power from the domain if all devices in it have
> + * been stopped.
> + */
> +static int pm_genpd_suspend_noirq(struct device *dev)
> +{
> + dev_dbg(dev, "%s()\n", __func__);
> +
> + return genpd_finish_suspend(dev, false);
> +}
> +
> +/**
> * pm_genpd_resume_noirq - Start of resume of device in an I/O PM domain.
> * @dev: Device to resume.
> *
> @@ -961,6 +982,10 @@ static int pm_genpd_resume_noirq(struct device *dev)
> if (genpd->dev_ops.stop && genpd->dev_ops.start)
> ret = pm_runtime_force_resume(dev);
>
> + ret = pm_generic_resume_noirq(dev);
> + if (ret)
> + return ret;
> +
> return ret;
> }
>
> @@ -984,6 +1009,10 @@ static int pm_genpd_freeze_noirq(struct device *dev)
> if (IS_ERR(genpd))
> return -EINVAL;
>
> + ret = pm_generic_freeze_noirq(dev);
> + if (ret)
> + return ret;
> +
> if (genpd->dev_ops.stop && genpd->dev_ops.start)
> ret = pm_runtime_force_suspend(dev);
>
> @@ -1008,10 +1037,28 @@ static int pm_genpd_thaw_noirq(struct device *dev)
> if (IS_ERR(genpd))
> return -EINVAL;
>
> - if (genpd->dev_ops.stop && genpd->dev_ops.start)
> + if (genpd->dev_ops.stop && genpd->dev_ops.start) {
> ret = pm_runtime_force_resume(dev);
> + if (ret)
> + return ret;
> + }
>
> - return ret;
> + return pm_generic_thaw_noirq(dev);
> +}
> +
> +/**
> + * pm_genpd_poweroff_noirq - Completion of hibernation of device in an
> + * I/O PM domain.
> + * @dev: Device to poweroff.
> + *
> + * Stop the device and remove power from the domain if all devices in it have
> + * been stopped.
> + */
> +static int pm_genpd_poweroff_noirq(struct device *dev)
> +{
> + dev_dbg(dev, "%s()\n", __func__);
> +
> + return genpd_finish_suspend(dev, true);
> }
>
> /**
> @@ -1048,10 +1095,13 @@ static int pm_genpd_restore_noirq(struct device *dev)
> genpd_sync_power_on(genpd, true, 0);
> genpd_unlock(genpd);
>
> - if (genpd->dev_ops.stop && genpd->dev_ops.start)
> + if (genpd->dev_ops.stop && genpd->dev_ops.start) {
> ret = pm_runtime_force_resume(dev);
> + if (ret)
> + return ret;
> + }
>
> - return ret;
> + return pm_generic_restore_noirq(dev);
> }
>
> /**
> @@ -1493,7 +1543,7 @@ int pm_genpd_init(struct generic_pm_domain *genpd,
> genpd->domain.ops.resume_noirq = pm_genpd_resume_noirq;
> genpd->domain.ops.freeze_noirq = pm_genpd_freeze_noirq;
> genpd->domain.ops.thaw_noirq = pm_genpd_thaw_noirq;
> - genpd->domain.ops.poweroff_noirq = pm_genpd_suspend_noirq;
> + genpd->domain.ops.poweroff_noirq = pm_genpd_poweroff_noirq;
> genpd->domain.ops.restore_noirq = pm_genpd_restore_noirq;
> genpd->domain.ops.complete = pm_genpd_complete;
>
>
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