[PATCH 2/9] PM: domains: Implement the ->set_performance_state() callback for genpd

From: Ulf Hansson <ulf.hansson@linaro.org>
To: Sudeep Holla <sudeep.holla@arm.com>,
	Cristian Marussi <cristian.marussi@arm.com>,
	Viresh Kumar <vireshk@kernel.org>,
	"Rafael J . Wysocki" <rafael@kernel.org>
Cc: Nishanth Menon <nm@ti.com>, Stephen Boyd <sboyd@kernel.org>,
	Nikunj Kela <nkela@quicinc.com>,
	Prasad Sodagudi <psodagud@quicinc.com>,
	Alexandre Torgue <alexandre.torgue@foss.st.com>,
	Ulf Hansson <ulf.hansson@linaro.org>,
	linux-pm@vger.kernel.org, linux-arm-kernel@lists.infradead.org,
	linux-kernel@vger.kernel.org
Subject: [PATCH 2/9] PM: domains: Implement the ->set_performance_state() callback for genpd
Date: Mon, 25 Sep 2023 15:17:08 +0200	[thread overview]
Message-ID: <20230925131715.138411-3-ulf.hansson@linaro.org> (raw)
In-Reply-To: <20230925131715.138411-1-ulf.hansson@linaro.org>

To enable generic support for performance scaling for PM domains, let's
implement the ->set_performance_state() callback for genpd.

Beyond this change, users of the corresponding genpd specific API,
dev_pm_genpd_set_performance_state() are encouraged to switch to the common
dev_pm_domain_set_performance_state() API.

Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
---
 drivers/base/power/domain.c | 33 +++++++++++++++++++++------------
 1 file changed, 21 insertions(+), 12 deletions(-)

diff --git a/drivers/base/power/domain.c b/drivers/base/power/domain.c
index c74edf80417f..da1777e39eaa 100644
--- a/drivers/base/power/domain.c
+++ b/drivers/base/power/domain.c
@@ -420,6 +420,25 @@ static void genpd_restore_performance_state(struct device *dev,
 		genpd_set_performance_state(dev, state);
 }
 
+static int genpd_dev_pm_set_performance_state(struct device *dev,
+					      unsigned int state)
+{
+	struct generic_pm_domain *genpd = dev_to_genpd(dev);
+	int ret = 0;
+
+	genpd_lock(genpd);
+	if (pm_runtime_suspended(dev)) {
+		dev_gpd_data(dev)->rpm_pstate = state;
+	} else {
+		ret = genpd_set_performance_state(dev, state);
+		if (!ret)
+			dev_gpd_data(dev)->rpm_pstate = 0;
+	}
+	genpd_unlock(genpd);
+
+	return ret;
+}
+
 /**
  * dev_pm_genpd_set_performance_state- Set performance state of device's power
  * domain.
@@ -438,7 +457,6 @@ static void genpd_restore_performance_state(struct device *dev,
 int dev_pm_genpd_set_performance_state(struct device *dev, unsigned int state)
 {
 	struct generic_pm_domain *genpd;
-	int ret = 0;
 
 	genpd = dev_to_genpd_safe(dev);
 	if (!genpd)
@@ -448,17 +466,7 @@ int dev_pm_genpd_set_performance_state(struct device *dev, unsigned int state)
 		     !dev->power.subsys_data->domain_data))
 		return -EINVAL;
 
-	genpd_lock(genpd);
-	if (pm_runtime_suspended(dev)) {
-		dev_gpd_data(dev)->rpm_pstate = state;
-	} else {
-		ret = genpd_set_performance_state(dev, state);
-		if (!ret)
-			dev_gpd_data(dev)->rpm_pstate = 0;
-	}
-	genpd_unlock(genpd);
-
-	return ret;
+	return genpd_dev_pm_set_performance_state(dev, state);
 }
 EXPORT_SYMBOL_GPL(dev_pm_genpd_set_performance_state);
 
@@ -2080,6 +2088,7 @@ int pm_genpd_init(struct generic_pm_domain *genpd,
 	genpd->domain.ops.restore_noirq = genpd_restore_noirq;
 	genpd->domain.ops.complete = genpd_complete;
 	genpd->domain.start = genpd_dev_pm_start;
+	genpd->domain.set_performance_state = genpd_dev_pm_set_performance_state;
 
 	if (genpd->flags & GENPD_FLAG_PM_CLK) {
 		genpd->dev_ops.stop = pm_clk_suspend;
-- 
2.34.1

