Re: [PATCH v1 5/5] PM / devfreq: tegra30: Make CPUFreq notifier to take into account boosting

[Chanwoo Choi]

Hi Dmitry,

On 3/31/20 8:16 AM, Dmitry Osipenko wrote:
> MCCPU frequency boosting needs to be taken into account in order to avoid
> scheduling of unnecessary devfreq updates.

"in order to avoid scheduling of unnecessary devfreq updates."
I don't understand the correct meaning of following description.
Could you explain it more detailed?

> 
> Signed-off-by: Dmitry Osipenko <digetx@xxxxxxxxx>
> ---
>  drivers/devfreq/tegra30-devfreq.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/devfreq/tegra30-devfreq.c b/drivers/devfreq/tegra30-devfreq.c
> index 34f6291e880c..3b57aac9894c 100644
> --- a/drivers/devfreq/tegra30-devfreq.c
> +++ b/drivers/devfreq/tegra30-devfreq.c
> @@ -420,7 +420,7 @@ tegra_actmon_cpufreq_contribution(struct tegra_devfreq *tegra,
>  
>  	static_cpu_emc_freq = actmon_cpu_to_emc_rate(tegra, cpu_freq);
>  
> -	if (dev_freq >= static_cpu_emc_freq)
> +	if (dev_freq + actmon_dev->boost_freq >= static_cpu_emc_freq)
>  		return 0;
>  
>  	return static_cpu_emc_freq;
> 


-- 
Best Regards,
Chanwoo Choi
Samsung Electronics