* [PATCH] PM: runtime: Extend support for wakeirq for force_suspend|resume
@ 2022-06-08 15:31 Ulf Hansson
2022-06-09 3:16 ` Chunfeng Yun
2022-06-14 11:16 ` Tony Lindgren
0 siblings, 2 replies; 4+ messages in thread
From: Ulf Hansson @ 2022-06-08 15:31 UTC (permalink / raw)
To: Rafael J . Wysocki, linux-pm
Cc: Rafael J . Wysocki, Tony Lindgren, Chunfeng Yun, Axe Yang,
Chaotian Jing, Geert Uytterhoeven, linux-kernel, Ulf Hansson
A driver that makes use of pm_runtime_force_suspend|resume() to support
system suspend/resume, currently needs to manage the wakeirq support
itself. To avoid the boilerplate code in the driver's system suspend/resume
callbacks in particular, let's extend pm_runtime_force_suspend|resume() to
deal with the wakeirq.
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
---
Note that, the reason behind this patch came up while discussing an MMC patch
for a Mediatek MMC host driver [1].
Kind regards
Ulf Hansson
[1]
https://lkml.org/lkml/2022/6/8/813
---
drivers/base/power/runtime.c | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/drivers/base/power/runtime.c b/drivers/base/power/runtime.c
index 676dc72d912d..445a724cbded 100644
--- a/drivers/base/power/runtime.c
+++ b/drivers/base/power/runtime.c
@@ -1876,10 +1876,13 @@ int pm_runtime_force_suspend(struct device *dev)
callback = RPM_GET_CALLBACK(dev, runtime_suspend);
+ dev_pm_enable_wake_irq_check(dev, true);
ret = callback ? callback(dev) : 0;
if (ret)
goto err;
+ dev_pm_enable_wake_irq_complete(dev);
+
/*
* If the device can stay in suspend after the system-wide transition
* to the working state that will follow, drop the children counter of
@@ -1896,6 +1899,7 @@ int pm_runtime_force_suspend(struct device *dev)
return 0;
err:
+ dev_pm_disable_wake_irq_check(dev, true);
pm_runtime_enable(dev);
return ret;
}
@@ -1929,9 +1933,11 @@ int pm_runtime_force_resume(struct device *dev)
callback = RPM_GET_CALLBACK(dev, runtime_resume);
+ dev_pm_disable_wake_irq_check(dev, false);
ret = callback ? callback(dev) : 0;
if (ret) {
pm_runtime_set_suspended(dev);
+ dev_pm_enable_wake_irq_check(dev, false);
goto out;
}
--
2.25.1
^ permalink raw reply related [flat|nested] 4+ messages in thread
* Re: [PATCH] PM: runtime: Extend support for wakeirq for force_suspend|resume
2022-06-08 15:31 [PATCH] PM: runtime: Extend support for wakeirq for force_suspend|resume Ulf Hansson
@ 2022-06-09 3:16 ` Chunfeng Yun
2022-06-14 11:16 ` Tony Lindgren
1 sibling, 0 replies; 4+ messages in thread
From: Chunfeng Yun @ 2022-06-09 3:16 UTC (permalink / raw)
To: Ulf Hansson, Rafael J . Wysocki, linux-pm
Cc: Rafael J . Wysocki, Tony Lindgren, Axe Yang, Chaotian Jing,
Geert Uytterhoeven, linux-kernel
On Wed, 2022-06-08 at 17:31 +0200, Ulf Hansson wrote:
> A driver that makes use of pm_runtime_force_suspend|resume() to
> support
> system suspend/resume, currently needs to manage the wakeirq support
> itself. To avoid the boilerplate code in the driver's system
> suspend/resume
> callbacks in particular, let's extend
> pm_runtime_force_suspend|resume() to
> deal with the wakeirq.
>
> Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
> ---
>
> Note that, the reason behind this patch came up while discussing an
> MMC patch
> for a Mediatek MMC host driver [1].
>
> Kind regards
> Ulf Hansson
>
> [1]
> https://lkml.org/lkml/2022/6/8/813
>
> ---
> drivers/base/power/runtime.c | 6 ++++++
> 1 file changed, 6 insertions(+)
>
> diff --git a/drivers/base/power/runtime.c
> b/drivers/base/power/runtime.c
> index 676dc72d912d..445a724cbded 100644
> --- a/drivers/base/power/runtime.c
> +++ b/drivers/base/power/runtime.c
> @@ -1876,10 +1876,13 @@ int pm_runtime_force_suspend(struct device
> *dev)
>
> callback = RPM_GET_CALLBACK(dev, runtime_suspend);
>
> + dev_pm_enable_wake_irq_check(dev, true);
> ret = callback ? callback(dev) : 0;
> if (ret)
> goto err;
>
> + dev_pm_enable_wake_irq_complete(dev);
> +
> /*
> * If the device can stay in suspend after the system-wide
> transition
> * to the working state that will follow, drop the children
> counter of
> @@ -1896,6 +1899,7 @@ int pm_runtime_force_suspend(struct device
> *dev)
> return 0;
>
> err:
> + dev_pm_disable_wake_irq_check(dev, true);
> pm_runtime_enable(dev);
> return ret;
> }
> @@ -1929,9 +1933,11 @@ int pm_runtime_force_resume(struct device
> *dev)
>
> callback = RPM_GET_CALLBACK(dev, runtime_resume);
>
> + dev_pm_disable_wake_irq_check(dev, false);
> ret = callback ? callback(dev) : 0;
> if (ret) {
> pm_runtime_set_suspended(dev);
> + dev_pm_enable_wake_irq_check(dev, false);
> goto out;
> }
>
Reviewed-by Chunfeng Yun <chunfeng.yun@mediatek.com>
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: [PATCH] PM: runtime: Extend support for wakeirq for force_suspend|resume
2022-06-08 15:31 [PATCH] PM: runtime: Extend support for wakeirq for force_suspend|resume Ulf Hansson
2022-06-09 3:16 ` Chunfeng Yun
@ 2022-06-14 11:16 ` Tony Lindgren
2022-07-08 19:37 ` Rafael J. Wysocki
1 sibling, 1 reply; 4+ messages in thread
From: Tony Lindgren @ 2022-06-14 11:16 UTC (permalink / raw)
To: Ulf Hansson
Cc: Rafael J . Wysocki, linux-pm, Rafael J . Wysocki, Chunfeng Yun,
Axe Yang, Chaotian Jing, Geert Uytterhoeven, linux-kernel
* Ulf Hansson <ulf.hansson@linaro.org> [220608 15:26]:
> A driver that makes use of pm_runtime_force_suspend|resume() to support
> system suspend/resume, currently needs to manage the wakeirq support
> itself. To avoid the boilerplate code in the driver's system suspend/resume
> callbacks in particular, let's extend pm_runtime_force_suspend|resume() to
> deal with the wakeirq.
Looks good to me:
Reviewed-by: Tony Lindgren <tony@atomide.com>
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: [PATCH] PM: runtime: Extend support for wakeirq for force_suspend|resume
2022-06-14 11:16 ` Tony Lindgren
@ 2022-07-08 19:37 ` Rafael J. Wysocki
0 siblings, 0 replies; 4+ messages in thread
From: Rafael J. Wysocki @ 2022-07-08 19:37 UTC (permalink / raw)
To: Tony Lindgren, Ulf Hansson
Cc: Rafael J . Wysocki, Linux PM, Rafael J . Wysocki, Chunfeng Yun,
Axe Yang, Chaotian Jing, Geert Uytterhoeven,
Linux Kernel Mailing List
On Tue, Jun 14, 2022 at 1:16 PM Tony Lindgren <tony@atomide.com> wrote:
>
> * Ulf Hansson <ulf.hansson@linaro.org> [220608 15:26]:
> > A driver that makes use of pm_runtime_force_suspend|resume() to support
> > system suspend/resume, currently needs to manage the wakeirq support
> > itself. To avoid the boilerplate code in the driver's system suspend/resume
> > callbacks in particular, let's extend pm_runtime_force_suspend|resume() to
> > deal with the wakeirq.
>
> Looks good to me:
>
> Reviewed-by: Tony Lindgren <tony@atomide.com>
Applied (as 5.20 material), but there is still a quite fundamental
problem with pm_runtime_force_suspend|resume() which is using
RPM_GET_CALLBACK() in these functions, because that macro returns a
middle-layer PM-runtime callback, so any bus type or PM domain
implementing meaningful generic power management ends up calling its
own PM-runtime callback from its system-wide PM callback which is
super-confusing at best.
Another problem with them is that they are generally not suitable for
devices that can wake up the system from sleep.
^ permalink raw reply [flat|nested] 4+ messages in thread
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2022-06-08 15:31 [PATCH] PM: runtime: Extend support for wakeirq for force_suspend|resume Ulf Hansson
2022-06-09 3:16 ` Chunfeng Yun
2022-06-14 11:16 ` Tony Lindgren
2022-07-08 19:37 ` Rafael J. Wysocki
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