linux-kernel - Re: [PATCH v4 10/24] PM / devfreq: tegra30: Don't enable consecutive-down interrupt on startup

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Message-ID: <933b99a1-ac45-25fb-e8d5-0641ec0cab18@samsung.com>
Date:   Tue, 16 Jul 2019 21:17:00 +0900
From:   Chanwoo Choi <cw00.choi@...sung.com>
To:     Dmitry Osipenko <digetx@...il.com>,
        Thierry Reding <thierry.reding@...il.com>,
        MyungJoo Ham <myungjoo.ham@...sung.com>,
        Kyungmin Park <kyungmin.park@...sung.com>,
        Jonathan Hunter <jonathanh@...dia.com>,
        Tomeu Vizoso <tomeu.vizoso@...labora.com>
Cc:     linux-pm@...r.kernel.org, linux-tegra@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v4 10/24] PM / devfreq: tegra30: Don't enable
 consecutive-down interrupt on startup

Hi Dmitry,

On 19. 7. 8. 오전 7:32, Dmitry Osipenko wrote:
> The consecutive-down event tells that we should perform frequency
> de-boosting, but boosting is in a reset state on start and hence the
> event won't do anything useful for us and it will be just a dummy
> interrupt request.
> 
> Signed-off-by: Dmitry Osipenko <digetx@...il.com>
> ---
>  drivers/devfreq/tegra30-devfreq.c | 1 -
>  1 file changed, 1 deletion(-)
> 
> diff --git a/drivers/devfreq/tegra30-devfreq.c b/drivers/devfreq/tegra30-devfreq.c
> index 32fe95458ee7..878c9396bb8c 100644
> --- a/drivers/devfreq/tegra30-devfreq.c
> +++ b/drivers/devfreq/tegra30-devfreq.c
> @@ -558,7 +558,6 @@ static void tegra_actmon_configure_device(struct tegra_devfreq *tegra,
>  		<< ACTMON_DEV_CTRL_CONSECUTIVE_ABOVE_WMARK_NUM_SHIFT;
>  	val |= ACTMON_DEV_CTRL_AVG_ABOVE_WMARK_EN;
>  	val |= ACTMON_DEV_CTRL_AVG_BELOW_WMARK_EN;
> -	val |= ACTMON_DEV_CTRL_CONSECUTIVE_BELOW_WMARK_EN;
>  	val |= ACTMON_DEV_CTRL_CONSECUTIVE_ABOVE_WMARK_EN;
>  	val |= ACTMON_DEV_CTRL_ENB;
>  
> 

Maybe, I think that better to review it by Thierry.
I'm not sure it is right or not because it depend on h/w.

-- 
Best Regards,
Chanwoo Choi
Samsung Electronics