linux-kernel - [PATCH v3 4/5] cpufreq: qcom-cpufreq-hw: Use new thermal pressure update function

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Message-Id: <20211103161020.26714-5-lukasz.luba@arm.com>
Date:   Wed,  3 Nov 2021 16:10:19 +0000
From:   Lukasz Luba <lukasz.luba@....com>
To:     linux-kernel@...r.kernel.org, linux-pm@...r.kernel.org
Cc:     linux-arm-kernel@...ts.infradead.org,
        linux-arm-msm@...r.kernel.org, lukasz.luba@....com,
        sudeep.holla@....com, will@...nel.org, catalin.marinas@....com,
        linux@...linux.org.uk, gregkh@...uxfoundation.org,
        rafael@...nel.org, viresh.kumar@...aro.org, amitk@...nel.org,
        daniel.lezcano@...aro.org, amit.kachhap@...il.com,
        thara.gopinath@...aro.org, bjorn.andersson@...aro.org,
        agross@...nel.org
Subject: [PATCH v3 4/5] cpufreq: qcom-cpufreq-hw: Use new thermal pressure update function

Thermal pressure provides a new API, which allows to use CPU frequency
as an argument. That removes the need of local conversion to capacity.
Use this new API and remove old local conversion code.

Signed-off-by: Lukasz Luba <lukasz.luba@....com>
---
 drivers/cpufreq/qcom-cpufreq-hw.c | 15 +++++----------
 1 file changed, 5 insertions(+), 10 deletions(-)

diff --git a/drivers/cpufreq/qcom-cpufreq-hw.c b/drivers/cpufreq/qcom-cpufreq-hw.c
index 0138b2ec406d..425f351450ad 100644
--- a/drivers/cpufreq/qcom-cpufreq-hw.c
+++ b/drivers/cpufreq/qcom-cpufreq-hw.c
@@ -275,10 +275,10 @@ static unsigned int qcom_lmh_get_throttle_freq(struct qcom_cpufreq_data *data)
 
 static void qcom_lmh_dcvs_notify(struct qcom_cpufreq_data *data)
 {
-	unsigned long max_capacity, capacity, freq_hz, throttled_freq;
 	struct cpufreq_policy *policy = data->policy;
 	int cpu = cpumask_first(policy->cpus);
 	struct device *dev = get_cpu_device(cpu);
+	unsigned long freq_hz, throttled_freq;
 	struct dev_pm_opp *opp;
 	unsigned int freq;
 
@@ -295,17 +295,12 @@ static void qcom_lmh_dcvs_notify(struct qcom_cpufreq_data *data)
 
 	throttled_freq = freq_hz / HZ_PER_KHZ;
 
-	/* Update thermal pressure */
-
-	max_capacity = arch_scale_cpu_capacity(cpu);
-	capacity = mult_frac(max_capacity, throttled_freq, policy->cpuinfo.max_freq);
-
 	/* Don't pass boost capacity to scheduler */
-	if (capacity > max_capacity)
-		capacity = max_capacity;
+	if (throttled_freq > policy->cpuinfo.max_freq)
+		throttled_freq = policy->cpuinfo.max_freq;
 
-	arch_set_thermal_pressure(policy->related_cpus,
-				  max_capacity - capacity);
+	/* Update thermal pressure */
+	arch_update_thermal_pressure(policy->related_cpus, throttled_freq);
 
 	/*
 	 * In the unlikely case policy is unregistered do not enable
-- 
2.17.1