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Date: Wed, 12 Dec 2018 16:27:28 +0530
From: Viresh Kumar <viresh.kumar@...aro.org>
To: ulf.hansson@...aro.org, Rafael Wysocki <rjw@...ysocki.net>,
Kevin Hilman <khilman@...nel.org>, Pavel Machek <pavel@....cz>,
Len Brown <len.brown@...el.com>
Cc: Viresh Kumar <viresh.kumar@...aro.org>, linux-pm@...r.kernel.org,
Vincent Guittot <vincent.guittot@...aro.org>,
Stephen Boyd <sboyd@...nel.org>, Nishanth Menon <nm@...com>,
rnayak@...eaurora.org, niklas.cassel@...aro.org,
linux-kernel@...r.kernel.org
Subject: [PATCH V3 5/6] PM / Domains: Factorize dev_pm_genpd_set_performance_state()
Separate out _genpd_set_performance_state() and
_genpd_reeval_performance_state() from
dev_pm_genpd_set_performance_state() to handle performance state update
related stuff. This will be used by a later commit.
Acked-by: Ulf Hansson <ulf.hansson@...aro.org>
Tested-by: Rajendra Nayak <rnayak@...eaurora.org>
Signed-off-by: Viresh Kumar <viresh.kumar@...aro.org>
---
drivers/base/power/domain.c | 96 +++++++++++++++++++++----------------
1 file changed, 56 insertions(+), 40 deletions(-)
diff --git a/drivers/base/power/domain.c b/drivers/base/power/domain.c
index 1e98c637e069..32ecbefbd191 100644
--- a/drivers/base/power/domain.c
+++ b/drivers/base/power/domain.c
@@ -239,6 +239,58 @@ static void genpd_update_accounting(struct generic_pm_domain *genpd)
static inline void genpd_update_accounting(struct generic_pm_domain *genpd) {}
#endif
+static int _genpd_set_performance_state(struct generic_pm_domain *genpd,
+ unsigned int state)
+{
+ int ret;
+
+ ret = genpd->set_performance_state(genpd, state);
+ if (ret)
+ return ret;
+
+ genpd->performance_state = state;
+ return 0;
+}
+
+static int _genpd_reeval_performance_state(struct generic_pm_domain *genpd,
+ unsigned int state)
+{
+ struct generic_pm_domain_data *pd_data;
+ struct pm_domain_data *pdd;
+
+ /* New requested state is same as Max requested state */
+ if (state == genpd->performance_state)
+ return 0;
+
+ /* New requested state is higher than Max requested state */
+ if (state > genpd->performance_state)
+ goto update_state;
+
+ /* Traverse all devices within the domain */
+ list_for_each_entry(pdd, &genpd->dev_list, list_node) {
+ pd_data = to_gpd_data(pdd);
+
+ if (pd_data->performance_state > state)
+ state = pd_data->performance_state;
+ }
+
+ if (state == genpd->performance_state)
+ return 0;
+
+ /*
+ * We aren't propagating performance state changes of a subdomain to its
+ * masters as we don't have hardware that needs it. Over that, the
+ * performance states of subdomain and its masters may not have
+ * one-to-one mapping and would require additional information. We can
+ * get back to this once we have hardware that needs it. For that
+ * reason, we don't have to consider performance state of the subdomains
+ * of genpd here.
+ */
+
+update_state:
+ return _genpd_set_performance_state(genpd, state);
+}
+
/**
* dev_pm_genpd_set_performance_state- Set performance state of device's power
* domain.
@@ -257,10 +309,9 @@ static inline void genpd_update_accounting(struct generic_pm_domain *genpd) {}
int dev_pm_genpd_set_performance_state(struct device *dev, unsigned int state)
{
struct generic_pm_domain *genpd;
- struct generic_pm_domain_data *gpd_data, *pd_data;
- struct pm_domain_data *pdd;
+ struct generic_pm_domain_data *gpd_data;
unsigned int prev;
- int ret = 0;
+ int ret;
genpd = dev_to_genpd(dev);
if (IS_ERR(genpd))
@@ -281,45 +332,10 @@ int dev_pm_genpd_set_performance_state(struct device *dev, unsigned int state)
prev = gpd_data->performance_state;
gpd_data->performance_state = state;
- /* New requested state is same as Max requested state */
- if (state == genpd->performance_state)
- goto unlock;
-
- /* New requested state is higher than Max requested state */
- if (state > genpd->performance_state)
- goto update_state;
-
- /* Traverse all devices within the domain */
- list_for_each_entry(pdd, &genpd->dev_list, list_node) {
- pd_data = to_gpd_data(pdd);
-
- if (pd_data->performance_state > state)
- state = pd_data->performance_state;
- }
-
- if (state == genpd->performance_state)
- goto unlock;
-
- /*
- * We aren't propagating performance state changes of a subdomain to its
- * masters as we don't have hardware that needs it. Over that, the
- * performance states of subdomain and its masters may not have
- * one-to-one mapping and would require additional information. We can
- * get back to this once we have hardware that needs it. For that
- * reason, we don't have to consider performance state of the subdomains
- * of genpd here.
- */
-
-update_state:
- ret = genpd->set_performance_state(genpd, state);
- if (ret) {
+ ret = _genpd_reeval_performance_state(genpd, state);
+ if (ret)
gpd_data->performance_state = prev;
- goto unlock;
- }
- genpd->performance_state = state;
-
-unlock:
genpd_unlock(genpd);
return ret;
--
2.19.1.568.g152ad8e3369a
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