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authorUlf Hansson <ulf.hansson@linaro.org>2021-06-03 12:34:37 +0300
committerRafael J. Wysocki <rafael.j.wysocki@intel.com>2021-06-11 19:39:24 +0300
commit5937c3ce21228d33d2eb3287baa7e4cf6978dba9 (patch)
tree0d6dec080ef9d2d7161b286e67b117ca6b7e603f /include/linux/pm_domain.h
parentd97fe100ee0b36c5dd8013ffd70fe8fcdcabff2b (diff)
downloadlinux-5937c3ce21228d33d2eb3287baa7e4cf6978dba9.tar.xz
PM: domains: Drop/restore performance state votes for devices at runtime PM
A subsystem/driver that need to manage OPPs for its device, should typically drop its vote for the OPP when the device becomes runtime suspended. In this way, the corresponding aggregation of the performance state votes that is managed in genpd for the attached PM domain, may find that the aggregated vote can be decreased. Hence, it may allow genpd to set the lower performance state for the PM domain, thus avoiding to waste energy. To accomplish this, typically a subsystem/driver would need to call dev_pm_opp_set_rate|opp() for its device from its ->runtime_suspend() callback, to drop the vote for the OPP. Accordingly, it needs another call to dev_pm_opp_set_rate|opp() to restore the vote for the OPP from its ->runtime_resume() callback. To avoid boilerplate code in subsystems/driver to deal with these things, let's instead manage this internally in genpd. Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org> Tested-by: Dmitry Osipenko <digetx@gmail.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'include/linux/pm_domain.h')
-rw-r--r--include/linux/pm_domain.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/include/linux/pm_domain.h b/include/linux/pm_domain.h
index dfcfbcecc34b..21a0577305ef 100644
--- a/include/linux/pm_domain.h
+++ b/include/linux/pm_domain.h
@@ -198,6 +198,7 @@ struct generic_pm_domain_data {
struct notifier_block *power_nb;
int cpu;
unsigned int performance_state;
+ unsigned int rpm_pstate;
ktime_t next_wakeup;
void *data;
};