[PATCH v2 4/4] PM: domains: Drop/restore performance state votes for devices at system PM
From: Ulf Hansson <hidden>
Date: 2021-06-03 09:34:57
Also in:
lkml
Subsystem:
driver core, kobjects, debugfs and sysfs, generic pm domains, hibernation (aka software suspend, aka swsusp), power management core, suspend to ram, the rest · Maintainers:
Greg Kroah-Hartman, "Rafael J. Wysocki", Danilo Krummrich, Ulf Hansson, Linus Torvalds
Recent changes in genpd drops and restore performance state votes for devices during runtime PM. For the similar reasons, but to avoid the same kind of boilerplate code in device PM callbacks for system sleep in subsystems/drivers, let's drop and restore performance states votes in genpd for the attached devices during system sleep. Signed-off-by: Ulf Hansson <redacted> --- Changes in v2: - Rebased. - A few cosmetic changes. --- drivers/base/power/domain.c | 9 +++++++++ include/linux/pm_domain.h | 1 + 2 files changed, 10 insertions(+)
diff --git a/drivers/base/power/domain.c b/drivers/base/power/domain.c
index e5d97174c254..a33e5b341f3f 100644
--- a/drivers/base/power/domain.c
+++ b/drivers/base/power/domain.c@@ -1171,6 +1171,7 @@ static int genpd_prepare(struct device *dev) */ static int genpd_finish_suspend(struct device *dev, bool poweroff) { + struct generic_pm_domain_data *gpd_data = dev_gpd_data(dev); struct generic_pm_domain *genpd; int ret = 0;
@@ -1201,6 +1202,7 @@ static int genpd_finish_suspend(struct device *dev, bool poweroff) } genpd_lock(genpd); + gpd_data->pm_pstate = genpd_drop_performance_state(dev); genpd->suspended_count++; genpd_sync_power_off(genpd, true, 0); genpd_unlock(genpd);
@@ -1245,6 +1247,7 @@ static int genpd_resume_noirq(struct device *dev) genpd_lock(genpd); genpd_sync_power_on(genpd, true, 0); genpd->suspended_count--; + genpd_restore_performance_state(dev, dev_gpd_data(dev)->pm_pstate); genpd_unlock(genpd); if (genpd->dev_ops.stop && genpd->dev_ops.start &&
@@ -1364,6 +1367,7 @@ static int genpd_restore_noirq(struct device *dev) } genpd_sync_power_on(genpd, true, 0); + genpd_restore_performance_state(dev, dev_gpd_data(dev)->pm_pstate); genpd_unlock(genpd); if (genpd->dev_ops.stop && genpd->dev_ops.start &&
@@ -1409,23 +1413,28 @@ static void genpd_complete(struct device *dev) static void genpd_switch_state(struct device *dev, bool suspend) { struct generic_pm_domain *genpd; + struct generic_pm_domain_data *gpd_data; bool use_lock; genpd = dev_to_genpd_safe(dev); if (!genpd) return; + gpd_data = dev_gpd_data(dev); + use_lock = genpd_is_irq_safe(genpd); if (use_lock) genpd_lock(genpd); if (suspend) { + gpd_data->pm_pstate = genpd_drop_performance_state(dev); genpd->suspended_count++; genpd_sync_power_off(genpd, use_lock, 0); } else { genpd_sync_power_on(genpd, use_lock, 0); genpd->suspended_count--; + genpd_restore_performance_state(dev, gpd_data->pm_pstate); } if (use_lock)
diff --git a/include/linux/pm_domain.h b/include/linux/pm_domain.h
index 21a0577305ef..f6e9dc28621c 100644
--- a/include/linux/pm_domain.h
+++ b/include/linux/pm_domain.h@@ -199,6 +199,7 @@ struct generic_pm_domain_data { int cpu; unsigned int performance_state; unsigned int rpm_pstate; + unsigned int pm_pstate; ktime_t next_wakeup; void *data; };
--
2.25.1