[PATCH 3/4] PM / Domains: Factorize dev_pm_genpd_set_performance_state()

Viresh Kumar
2018-11-05T06:37:24Z

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.

Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
---
drivers/base/power/domain.c | 104 +++++++++++++++++++++---------------
1 file changed, 61 insertions(+), 43 deletions(-)

diff --git a/drivers/base/power/domain.c b/drivers/base/power/domain.c
index 0d928359b880..6d2e9b3406f1 100644
--- a/drivers/base/power/domain.c
+++ b/drivers/base/power/domain.c
@@ -239,6 +239,62 @@ 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;
+
+ if (!genpd_status_on(genpd))
+ goto out;
+
+ ret = genpd->set_performance_state(genpd, state);
+ if (ret)
+ return ret;
+
+out:
+ 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 +313,9 @@ 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))
@@ -281,47 +336,10 @@ 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:
- if (genpd_status_on(genpd)) {
- ret = genpd->set_performance_state(genpd, state);
- if (ret) {
- gpd_data->performance_state = prev;
- goto unlock;
- }
- }
-
- genpd->performance_state = state;
+ ret = _genpd_reeval_performance_state(genpd, state);
+ if (ret)
+ gpd_data->performance_state = prev;

-unlock:
genpd_unlock(genpd);

return ret;
--
2.19.1.568.g152ad8e3369a