Thread (127 messages) 127 messages, 7 authors, 2021-01-12

Re: [PATCH v2 20/48] PM: domains: Make set_performance_state() callback optional

From: Ulf Hansson <hidden>
Date: 2021-01-11 09:12:10
Also in: lkml

On Thu, 17 Dec 2020 at 19:07, Dmitry Osipenko [off-list ref] wrote:
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.

Signed-off-by: Dmitry Osipenko <digetx@gmail.com>
Reviewed-by: Ulf Hansson <redacted>

This should be ready to be picked up, but maybe it's easier if you
could send this to the linux-pm mailing list separately. Then Rafael
can pick it up.

Kind regards
Uffe
quoted hunk ↗ jump to hunk
---
 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;
+       }

        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;
--
2.29.2
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