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[PATCH v2 2/3] pmdomain: ti_sci: add wakeup constraint management

Kevin Hilman posted 3 patches 1 year, 5 months ago
There is a newer version of this series
[PATCH v2 2/3] pmdomain: ti_sci: add wakeup constraint management
Posted by Kevin Hilman 1 year, 5 months ago 
During system-wide suspend, check all devices connected to PM domain
to see if they are wakeup-enabled.  If so, set a TI SCI device
constraint.

Note: DM firmware clears all constraints on resume.

Co-developed-by: Vibhore Vardhan <vibhore@ti.com>
Signed-off-by: Vibhore Vardhan <vibhore@ti.com>
Signed-off-by: Kevin Hilman <khilman@baylibre.com>
Signed-off-by: Dhruva Gole <d-gole@ti.com>
---
 drivers/pmdomain/ti/ti_sci_pm_domains.c | 19 +++++++++++++++++++
 1 file changed, 19 insertions(+)

diff --git a/drivers/pmdomain/ti/ti_sci_pm_domains.c b/drivers/pmdomain/ti/ti_sci_pm_domains.c
index 963272fa387b..8af907579152 100644
--- a/drivers/pmdomain/ti/ti_sci_pm_domains.c
+++ b/drivers/pmdomain/ti/ti_sci_pm_domains.c
@@ -76,6 +76,23 @@ static int ti_sci_pd_set_lat_constraint(struct device *dev, s32 val)
 	return ret;
 }
 
+static inline bool ti_sci_pd_set_wkup_constraint(struct device *dev)
+{
+	struct generic_pm_domain *genpd = pd_to_genpd(dev->pm_domain);
+	struct ti_sci_pm_domain *pd = genpd_to_ti_sci_pd(genpd);
+	const struct ti_sci_handle *ti_sci = pd->parent->ti_sci;
+	int ret;
+
+	if (device_may_wakeup(dev)) {
+		ret = ti_sci->ops.pm_ops.set_device_constraint(ti_sci, pd->idx,
+							       TISCI_MSG_CONSTRAINT_SET);
+		if (!ret)
+			dev_dbg(dev, "ti_sci_pd: ID:%d set device constraint.\n", pd->idx);
+	}
+
+	return true;
+}
+
 /*
  * ti_sci_pd_power_off(): genpd power down hook
  * @domain: pointer to the powerdomain to power off
@@ -117,6 +134,8 @@ static int ti_sci_pd_suspend(struct device *dev)
 	if (ti_sci_pd_is_valid_constraint(val))
 		ti_sci_pd_set_lat_constraint(dev, val);
 
+	ti_sci_pd_set_wkup_constraint(dev);
+
 	return 0;
 }
 

-- 
2.46.0
Re: [PATCH v2 2/3] pmdomain: ti_sci: add wakeup constraint management
Posted by Ulf Hansson 1 year, 5 months ago 
On Tue, 20 Aug 2024 at 02:00, Kevin Hilman <khilman@baylibre.com> wrote:
>
> During system-wide suspend, check all devices connected to PM domain
> to see if they are wakeup-enabled.  If so, set a TI SCI device
> constraint.
>
> Note: DM firmware clears all constraints on resume.
>
> Co-developed-by: Vibhore Vardhan <vibhore@ti.com>
> Signed-off-by: Vibhore Vardhan <vibhore@ti.com>
> Signed-off-by: Kevin Hilman <khilman@baylibre.com>
> Signed-off-by: Dhruva Gole <d-gole@ti.com>
> ---
>  drivers/pmdomain/ti/ti_sci_pm_domains.c | 19 +++++++++++++++++++
>  1 file changed, 19 insertions(+)
>
> diff --git a/drivers/pmdomain/ti/ti_sci_pm_domains.c b/drivers/pmdomain/ti/ti_sci_pm_domains.c
> index 963272fa387b..8af907579152 100644
> --- a/drivers/pmdomain/ti/ti_sci_pm_domains.c
> +++ b/drivers/pmdomain/ti/ti_sci_pm_domains.c
> @@ -76,6 +76,23 @@ static int ti_sci_pd_set_lat_constraint(struct device *dev, s32 val)
>         return ret;
>  }
>
> +static inline bool ti_sci_pd_set_wkup_constraint(struct device *dev)
> +{

Similar comment as for patch1, should this be a static void intstead?

> +       struct generic_pm_domain *genpd = pd_to_genpd(dev->pm_domain);
> +       struct ti_sci_pm_domain *pd = genpd_to_ti_sci_pd(genpd);
> +       const struct ti_sci_handle *ti_sci = pd->parent->ti_sci;
> +       int ret;
> +
> +       if (device_may_wakeup(dev)) {
> +               ret = ti_sci->ops.pm_ops.set_device_constraint(ti_sci, pd->idx,
> +                                                              TISCI_MSG_CONSTRAINT_SET);
> +               if (!ret)
> +                       dev_dbg(dev, "ti_sci_pd: ID:%d set device constraint.\n", pd->idx);
> +       }
> +
> +       return true;
> +}
> +
>  /*
>   * ti_sci_pd_power_off(): genpd power down hook
>   * @domain: pointer to the powerdomain to power off
> @@ -117,6 +134,8 @@ static int ti_sci_pd_suspend(struct device *dev)
>         if (ti_sci_pd_is_valid_constraint(val))
>                 ti_sci_pd_set_lat_constraint(dev, val);
>
> +       ti_sci_pd_set_wkup_constraint(dev);
> +
>         return 0;
>  }
>
>
> --
> 2.46.0
>

Kind regards
Uffe
Re: [PATCH v2 2/3] pmdomain: ti_sci: add wakeup constraint management
Posted by Kevin Hilman 1 year, 5 months ago 
Ulf Hansson <ulf.hansson@linaro.org> writes:

> On Tue, 20 Aug 2024 at 02:00, Kevin Hilman <khilman@baylibre.com> wrote:
>>
>> During system-wide suspend, check all devices connected to PM domain
>> to see if they are wakeup-enabled.  If so, set a TI SCI device
>> constraint.
>>
>> Note: DM firmware clears all constraints on resume.
>>
>> Co-developed-by: Vibhore Vardhan <vibhore@ti.com>
>> Signed-off-by: Vibhore Vardhan <vibhore@ti.com>
>> Signed-off-by: Kevin Hilman <khilman@baylibre.com>
>> Signed-off-by: Dhruva Gole <d-gole@ti.com>
>> ---
>>  drivers/pmdomain/ti/ti_sci_pm_domains.c | 19 +++++++++++++++++++
>>  1 file changed, 19 insertions(+)
>>
>> diff --git a/drivers/pmdomain/ti/ti_sci_pm_domains.c b/drivers/pmdomain/ti/ti_sci_pm_domains.c
>> index 963272fa387b..8af907579152 100644
>> --- a/drivers/pmdomain/ti/ti_sci_pm_domains.c
>> +++ b/drivers/pmdomain/ti/ti_sci_pm_domains.c
>> @@ -76,6 +76,23 @@ static int ti_sci_pd_set_lat_constraint(struct device *dev, s32 val)
>>         return ret;
>>  }
>>
>> +static inline bool ti_sci_pd_set_wkup_constraint(struct device *dev)
>> +{
>
> Similar comment as for patch1, should this be a static void intstead?
>

Yes, will do in v3.

Kevin

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