From: Dmitry Osipenko <digetx@gmail.com>
To: Thierry Reding <thierry.reding@gmail.com>,
Jonathan Hunter <jonathanh@nvidia.com>,
Ulf Hansson <ulf.hansson@linaro.org>,
Peter Geis <pgwipeout@gmail.com>,
Nicolas Chauvet <kwizart@gmail.com>,
"Rafael J. Wysocki" <rjw@rjwysocki.net>,
Kevin Hilman <khilman@kernel.org>,
Peter De Schrijver <pdeschrijver@nvidia.com>,
Viresh Kumar <vireshk@kernel.org>,
Stephen Boyd <sboyd@kernel.org>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
Matt Merhar <mattmerhar@protonmail.com>
Cc: linux-kernel@vger.kernel.org, linux-tegra@vger.kernel.org,
linux-pm@vger.kernel.org
Subject: [PATCH v4 1/3] PM: domains: Make set_performance_state() callback optional
Date: Wed, 20 Jan 2021 04:50:08 +0300 [thread overview]
Message-ID: <20210120015010.14191-2-digetx@gmail.com> (raw)
In-Reply-To: <20210120015010.14191-1-digetx@gmail.com>
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 <pgwipeout@gmail.com>
Tested-by: Nicolas Chauvet <kwizart@gmail.com>
Tested-by: Matt Merhar <mattmerhar@protonmail.com>
[tested on NVIDIA Tegra20/30/124 SoCs]
Suggested-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Dmitry Osipenko <digetx@gmail.com>
---
drivers/base/power/domain.c | 33 ++++++++++++++++++---------------
1 file changed, 18 insertions(+), 15 deletions(-)
diff --git a/drivers/base/power/domain.c b/drivers/base/power/domain.c
index 9a14eedacb92..0bd0cdc30393 100644
--- a/drivers/base/power/domain.c
+++ b/drivers/base/power/domain.c
@@ -297,6 +297,18 @@ static int _genpd_reeval_performance_state(struct generic_pm_domain *genpd,
return state;
}
+static int _genpd_xlate_performance_state(struct generic_pm_domain *src_genpd,
+ struct generic_pm_domain *dst_genpd,
+ unsigned int pstate)
+{
+ if (!dst_genpd->set_performance_state)
+ return pstate;
+
+ return dev_pm_opp_xlate_performance_state(src_genpd->opp_table,
+ dst_genpd->opp_table,
+ pstate);
+}
+
static int _genpd_set_performance_state(struct generic_pm_domain *genpd,
unsigned int state, int depth)
{
@@ -311,13 +323,8 @@ static int _genpd_set_performance_state(struct generic_pm_domain *genpd,
list_for_each_entry(link, &genpd->child_links, child_node) {
parent = link->parent;
- if (!parent->set_performance_state)
- continue;
-
/* Find parent's performance state */
- ret = dev_pm_opp_xlate_performance_state(genpd->opp_table,
- parent->opp_table,
- state);
+ ret = _genpd_xlate_performance_state(genpd, parent, state);
if (unlikely(ret < 0))
goto err;
@@ -339,9 +346,11 @@ 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;
@@ -352,9 +361,6 @@ static int _genpd_set_performance_state(struct generic_pm_domain *genpd,
child_node) {
parent = link->parent;
- if (!parent->set_performance_state)
- continue;
-
genpd_lock_nested(parent, depth + 1);
parent_state = link->prev_performance_state;
@@ -399,9 +405,6 @@ 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
next prev parent reply other threads:[~2021-01-20 1:55 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-01-20 1:50 [PATCH v4 0/3] GENPD API improvements Dmitry Osipenko
2021-01-20 1:50 ` Dmitry Osipenko [this message]
2021-01-20 4:39 ` [PATCH v4 1/3] PM: domains: Make set_performance_state() callback optional Viresh Kumar
2021-01-20 9:46 ` Ulf Hansson
2021-01-20 1:50 ` [PATCH v4 2/3] PM: domains: Make of_genpd_add_subdomain() to return -EPROBE_DEFER Dmitry Osipenko
2021-01-20 1:50 ` [PATCH v4 3/3] PM: domains: Add "performance" column to debug summary Dmitry Osipenko
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