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Message-ID: <20220915090515.1660-1-xuewen.yan@unisoc.com>
Date: Thu, 15 Sep 2022 17:05:15 +0800
From: Xuewen Yan <xuewen.yan@...soc.com>
To: <agross@...nel.org>, <bjorn.andersson@...aro.org>,
<viresh.kumar@...aro.org>, <konrad.dybcio@...ainline.org>,
<rafael@...nel.org>
CC: <linux-arm-msm@...r.kernel.org>, <linux-pm@...r.kernel.org>,
<linux-kernel@...r.kernel.org>, <di.shen@...soc.com>
Subject: [PATCH] cpufreq: qcom-cpufreq-hw: Add cpufreq qos for LMh
Before update thermal pressure, the max cpufreq should be limited.
Add QOS control for Lmh throttle cpufreq.
Signed-off-by: Xuewen Yan <xuewen.yan@...soc.com>
---
drivers/cpufreq/qcom-cpufreq-hw.c | 14 ++++++++++++++
1 file changed, 14 insertions(+)
diff --git a/drivers/cpufreq/qcom-cpufreq-hw.c b/drivers/cpufreq/qcom-cpufreq-hw.c
index d5ef3c66c762..deb1219435a5 100644
--- a/drivers/cpufreq/qcom-cpufreq-hw.c
+++ b/drivers/cpufreq/qcom-cpufreq-hw.c
@@ -13,6 +13,7 @@
#include <linux/of_address.h>
#include <linux/of_platform.h>
#include <linux/pm_opp.h>
+#include <linux/pm_qos.h>
#include <linux/slab.h>
#include <linux/spinlock.h>
#include <linux/units.h>
@@ -56,6 +57,8 @@ struct qcom_cpufreq_data {
struct cpufreq_policy *policy;
bool per_core_dcvs;
+
+ struct freq_qos_request throttle_freq_req;
};
static unsigned long cpu_hw_rate, xo_rate;
@@ -318,6 +321,8 @@ static void qcom_lmh_dcvs_notify(struct qcom_cpufreq_data *data)
} else {
throttled_freq = freq_hz / HZ_PER_KHZ;
+ freq_qos_update_request(&data->throttle_freq_req, throttled_freq);
+
/* Update thermal pressure (the boost frequencies are accepted) */
arch_update_thermal_pressure(policy->related_cpus, throttled_freq);
@@ -413,6 +418,14 @@ static int qcom_cpufreq_hw_lmh_init(struct cpufreq_policy *policy, int index)
if (data->throttle_irq < 0)
return data->throttle_irq;
+ ret = freq_qos_add_request(&policy->constraints,
+ &data->throttle_freq_req, FREQ_QOS_MAX,
+ FREQ_QOS_MAX_DEFAULT_VALUE);
+ if (ret < 0) {
+ dev_err(&pdev->dev, "Failed to add freq constraint (%d)\n", ret);
+ return ret;
+ }
+
data->cancel_throttle = false;
data->policy = policy;
@@ -479,6 +492,7 @@ static void qcom_cpufreq_hw_lmh_exit(struct qcom_cpufreq_data *data)
if (data->throttle_irq <= 0)
return;
+ freq_qos_remove_request(&data->throttle_freq_req);
free_irq(data->throttle_irq, data);
}
--
2.25.1
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