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PM: domains: Improve runtime PM performance state handling

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GENPD core doesn't support handling performance state changes while
consumer device is runtime-suspended or when runtime PM is disabled.
GENPD core may override performance state that was configured by device
driver while RPM of the device was disabled or device was RPM-suspended.

Let's close that gap by allowing drivers to control performance state
while RPM of a consumer device is disabled and to set up performance
state of RPM-suspended device that will be applied by GENPD core on
RPM-resume of the device.

Fixes: 5937c3ce21 ("PM: domains: Drop/restore performance state votes for devices at runtime PM")
Signed-off-by: Dmitry Osipenko <digetx@gmail.com>
Reviewed-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
This commit is contained in:
Dmitry Osipenko 2021-08-23 23:24:12 +03:00 committed by Rafael J. Wysocki
parent e22ce8eb63
commit 3c5a272202
1 changed files with 8 additions and 2 deletions
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10
drivers/base/power/domain.c
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@ -435,7 +435,7 @@ static void genpd_restore_performance_state(struct device *dev,
int dev_pm_genpd_set_performance_state(struct device *dev, unsigned int state)
{
struct generic_pm_domain *genpd;
int ret;
int ret = 0;
genpd = dev_to_genpd_safe(dev);
if (!genpd)
@ -446,7 +446,13 @@ int dev_pm_genpd_set_performance_state(struct device *dev, unsigned int state)
return -EINVAL;
genpd_lock(genpd);
ret = genpd_set_performance_state(dev, state);
if (pm_runtime_suspended(dev)) {
dev_gpd_data(dev)->rpm_pstate = state;
} else {
ret = genpd_set_performance_state(dev, state);
if (!ret)
dev_gpd_data(dev)->rpm_pstate = 0;
}
genpd_unlock(genpd);
return ret;