Thread (15 messages) 15 messages, 3 authors, 2021-01-19

Re: [PATCH v3 1/3] PM: domains: Make set_performance_state() callback optional

From: Viresh Kumar <viresh.kumar@linaro.org>
Date: 2021-01-18 07:30:00
Also in: linux-tegra, lkml

On 18-01-21, 04:13, Dmitry Osipenko wrote:
quoted hunk ↗ jump to hunk
Make set_performance_state() callback optional in order to remove the
need from power domain drivers to implement a dummy callback. If callback
isn't implemented by a GENPD driver, then the performance state is passed
to the parent domain.

Tested-by: Peter Geis <redacted>
Tested-by: Nicolas Chauvet <redacted>
Tested-by: Matt Merhar <redacted>
Suggested-by: Ulf Hansson <redacted>
Reviewed-by: Ulf Hansson <redacted>
Signed-off-by: Dmitry Osipenko <digetx@gmail.com>
---
 drivers/base/power/domain.c | 11 +++++------
 1 file changed, 5 insertions(+), 6 deletions(-)
diff --git a/drivers/base/power/domain.c b/drivers/base/power/domain.c
index 9a14eedacb92..a3e1bfc233d4 100644
--- a/drivers/base/power/domain.c
+++ b/drivers/base/power/domain.c
@@ -339,9 +339,11 @@ static int _genpd_set_performance_state(struct generic_pm_domain *genpd,
 			goto err;
 	}
 
-	ret = genpd->set_performance_state(genpd, state);
-	if (ret)
-		goto err;
+	if (genpd->set_performance_state) {
+		ret = genpd->set_performance_state(genpd, state);
+		if (ret)
+			goto err;
+	}
Earlier in this routine we also have this:

if (!parent->set_performance_state)
        continue;

Should we change that too ?
quoted hunk ↗ jump to hunk
 
 	genpd->performance_state = state;
 	return 0;
@@ -399,9 +401,6 @@ int dev_pm_genpd_set_performance_state(struct device *dev, unsigned int state)
 	if (!genpd)
 		return -ENODEV;
 
-	if (unlikely(!genpd->set_performance_state))
-		return -EINVAL;
-
 	if (WARN_ON(!dev->power.subsys_data ||
 		     !dev->power.subsys_data->domain_data))
 		return -EINVAL;
Reviewed-by: Viresh Kumar <viresh.kumar@linaro.org>

-- 
viresh
Keyboard shortcuts
hback out one level
jnext message in thread
kprevious message in thread
ldrill in
Escclose help / fold thread tree
?toggle this help