From e2e4695f015eacbe11178540524438f631ba9413 Mon Sep 17 00:00:00 2001 From: Ulf Hansson Date: Tue, 25 Nov 2025 12:26:44 +0100 Subject: [PATCH] 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: Dhruva Gole Reviewed-by: Kevin Hilman (TI) Tested-by: Kevin Hilman (TI) Signed-off-by: Ulf Hansson Link: https://patch.msgid.link/20251125112650.329269-4-ulf.hansson@linaro.org Signed-off-by: Rafael J. Wysocki --- drivers/pmdomain/governor.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) diff --git a/drivers/pmdomain/governor.c b/drivers/pmdomain/governor.c index bd1b9d66d4a56..05e68680f34ba 100644 --- a/drivers/pmdomain/governor.c +++ b/drivers/pmdomain/governor.c @@ -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 -- 2.47.3