Can someone familiar with the code please review this ?
On 15-09-22, 17:05, Xuewen Yan wrote:
> Before update thermal pressure, the max cpufreq should be limited.
> Add QOS control for Lmh throttle cpufreq.
>
> Signed-off-by: Xuewen Yan <xuewen.yan@xxxxxxxxxx>
> ---
> 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);
> }
--
viresh
