Commit e2e4695f authored by Ulf Hansson's avatar Ulf Hansson Committed by Rafael J. Wysocki
Browse files

pmdomain: Respect the CPU system wakeup QoS limit for cpuidle 



The CPU system wakeup QoS limit must be respected for the regular cpuidle
state selection. Therefore, let's extend the genpd governor for CPUs to
take the constraint into account when it selects a domain idle state for
the corresponding PM domain.

Reviewed-by: default avatarDhruva Gole <d-gole@ti.com>
Reviewed-by: default avatarKevin Hilman (TI) <khilman@baylibre.com>
Tested-by: default avatarKevin Hilman (TI) <khilman@baylibre.com>
Signed-off-by: default avatarUlf Hansson <ulf.hansson@linaro.org>
Link: https://patch.msgid.link/20251125112650.329269-4-ulf.hansson@linaro.org


Signed-off-by: default avatarRafael J. Wysocki <rafael.j.wysocki@intel.com>
parent 8e7de6dc

drivers/pmdomain/governor.c

+5 −1
Original line number Diff line number Diff line
@@ -351,7 +351,7 @@ static bool cpu_power_down_ok(struct dev_pm_domain *pd) 
	ktime_t domain_wakeup, next_hrtimer;

	ktime_t now = ktime_get();

	struct device *cpu_dev;

	s64 cpu_constraint, global_constraint;

	s64 cpu_constraint, global_constraint, wakeup_constraint;

	s64 idle_duration_ns;

	int cpu, i;
@@ -362,7 +362,11 @@ static bool cpu_power_down_ok(struct dev_pm_domain *pd) 
	if (!(genpd->flags & GENPD_FLAG_CPU_DOMAIN))

		return true;



	wakeup_constraint = cpu_wakeup_latency_qos_limit();

	global_constraint = cpu_latency_qos_limit();

	if (global_constraint > wakeup_constraint)

		global_constraint = wakeup_constraint;



	/*

	 * Find the next wakeup for any of the online CPUs within the PM domain

	 * and its subdomains. Note, we only need the genpd->cpus, as it already