linux-kernel - Re: [PATCH v4 4/4] soc: samsung: exynos-asv: Update Energy Model after adjusting voltage

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Message-ID: <6445e850-fe24-4eb2-86f0-217b62b9001d@arm.com>
Date: Wed, 3 Apr 2024 14:07:55 +0200
From: Dietmar Eggemann <dietmar.eggemann@....com>
To: Lukasz Luba <lukasz.luba@....com>, linux-kernel@...r.kernel.org,
 linux-pm@...r.kernel.org, rafael@...nel.org
Cc: linux-arm-kernel@...ts.infradead.org, sboyd@...nel.org, nm@...com,
 linux-samsung-soc@...r.kernel.org, daniel.lezcano@...aro.org,
 viresh.kumar@...aro.org, krzysztof.kozlowski@...aro.org,
 alim.akhtar@...sung.com, m.szyprowski@...sung.com, mhiramat@...nel.org
Subject: Re: [PATCH v4 4/4] soc: samsung: exynos-asv: Update Energy Model
 after adjusting voltage

On 02/04/2024 17:58, Lukasz Luba wrote:

[...]

> @@ -97,9 +98,17 @@ static int exynos_asv_update_opps(struct exynos_asv *asv)
>  			last_opp_table = opp_table;
>  
>  			ret = exynos_asv_update_cpu_opps(asv, cpu);
> -			if (ret < 0)
> +			if (!ret) {
> +				/*
> +				 * When the voltage for OPPs could be changed,
> +				 * make sure to update the EM power values, to
> +				 * reflect the reality and not use stale data.
> +				 */

Maybe shorter?

                                /*
                                 * Update EM power values since OPP
                                 * voltage values may have changed.
                                 */

[...]