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[v3,02/12] opp: Filter out OPPs based on availability of a required-OPP

Message ID 20210118005524.27787-3-digetx@gmail.com
State New
Headers show
Series OPP API fixes and improvements | expand

Commit Message

Dmitry Osipenko Jan. 18, 2021, 12:55 a.m. UTC
A required OPP may not be available, and thus, all OPPs which are using
this required OPP should be unavailable too.

Tested-by: Peter Geis <pgwipeout@gmail.com>
Tested-by: Nicolas Chauvet <kwizart@gmail.com>
Tested-by: Matt Merhar <mattmerhar@protonmail.com>
Signed-off-by: Dmitry Osipenko <digetx@gmail.com>
---
 drivers/opp/core.c | 11 +++++++++++
 1 file changed, 11 insertions(+)

Comments

Viresh Kumar Jan. 18, 2021, 8:11 a.m. UTC | #1
On 18-01-21, 03:55, Dmitry Osipenko wrote:
> A required OPP may not be available, and thus, all OPPs which are using
> this required OPP should be unavailable too.
> 
> Tested-by: Peter Geis <pgwipeout@gmail.com>
> Tested-by: Nicolas Chauvet <kwizart@gmail.com>
> Tested-by: Matt Merhar <mattmerhar@protonmail.com>
> Signed-off-by: Dmitry Osipenko <digetx@gmail.com>
> ---
>  drivers/opp/core.c | 11 +++++++++++
>  1 file changed, 11 insertions(+)
> 
> diff --git a/drivers/opp/core.c b/drivers/opp/core.c
> index 48618ff3e99e..7b4d07279638 100644
> --- a/drivers/opp/core.c
> +++ b/drivers/opp/core.c
> @@ -1522,6 +1522,7 @@ int _opp_add(struct device *dev, struct dev_pm_opp *new_opp,
>  	     struct opp_table *opp_table, bool rate_not_available)
>  {
>  	struct list_head *head;
> +	unsigned int i;
>  	int ret;
>  
>  	mutex_lock(&opp_table->lock);
> @@ -1547,6 +1548,16 @@ int _opp_add(struct device *dev, struct dev_pm_opp *new_opp,
>  			 __func__, new_opp->rate);
>  	}
>  
> +	for (i = 0; i < opp_table->required_opp_count; i++) {
> +		if (new_opp->required_opps[i]->available)
> +			continue;
> +
> +		new_opp->available = false;
> +		dev_warn(dev, "%s: OPP not supported by required OPP %pOF (%lu)\n",
> +			 __func__, new_opp->required_opps[i]->np, new_opp->rate);
> +		break;
> +	}
> +
>  	return 0;
>  }

Applied. Thanks.

Though I am concerned about who will enable this back again if the
required-opp comes back. And I am not sure if we should even care
about that.
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Patch

diff --git a/drivers/opp/core.c b/drivers/opp/core.c
index 48618ff3e99e..7b4d07279638 100644
--- a/drivers/opp/core.c
+++ b/drivers/opp/core.c
@@ -1522,6 +1522,7 @@  int _opp_add(struct device *dev, struct dev_pm_opp *new_opp,
 	     struct opp_table *opp_table, bool rate_not_available)
 {
 	struct list_head *head;
+	unsigned int i;
 	int ret;
 
 	mutex_lock(&opp_table->lock);
@@ -1547,6 +1548,16 @@  int _opp_add(struct device *dev, struct dev_pm_opp *new_opp,
 			 __func__, new_opp->rate);
 	}
 
+	for (i = 0; i < opp_table->required_opp_count; i++) {
+		if (new_opp->required_opps[i]->available)
+			continue;
+
+		new_opp->available = false;
+		dev_warn(dev, "%s: OPP not supported by required OPP %pOF (%lu)\n",
+			 __func__, new_opp->required_opps[i]->np, new_opp->rate);
+		break;
+	}
+
 	return 0;
 }