linux-kernel - Re: [PATCH 15/31] drm/panfrost: Migrate to dev_pm_opp_set

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Date:   Thu, 26 May 2022 14:45:53 +0100
From:   Steven Price <steven.price@....com>
To:     Viresh Kumar <viresh.kumar@...aro.org>,
        Rob Herring <robh@...nel.org>,
        Tomeu Vizoso <tomeu.vizoso@...labora.com>,
        Alyssa Rosenzweig <alyssa.rosenzweig@...labora.com>
Cc:     linux-pm@...r.kernel.org,
        Vincent Guittot <vincent.guittot@...aro.org>,
        Rafael Wysocki <rjw@...ysocki.net>,
        Stephen Boyd <sboyd@...nel.org>, Nishanth Menon <nm@...com>,
        Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>,
        dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 15/31] drm/panfrost: Migrate to dev_pm_opp_set_config()

On 26/05/2022 12:42, Viresh Kumar wrote:
> The OPP core now provides a unified API for setting all configuration
> types, i.e. dev_pm_opp_set_config().
> 
> Lets start using it.
> 
> Signed-off-by: Viresh Kumar <viresh.kumar@...aro.org>

Acked-by: Steven Price <steven.price@....com>

> ---
>  drivers/gpu/drm/panfrost/panfrost_devfreq.c | 9 ++++++---
>  1 file changed, 6 insertions(+), 3 deletions(-)
> 
> diff --git a/drivers/gpu/drm/panfrost/panfrost_devfreq.c b/drivers/gpu/drm/panfrost/panfrost_devfreq.c
> index 194af7f607a6..7826d9366d35 100644
> --- a/drivers/gpu/drm/panfrost/panfrost_devfreq.c
> +++ b/drivers/gpu/drm/panfrost/panfrost_devfreq.c
> @@ -91,6 +91,10 @@ int panfrost_devfreq_init(struct panfrost_device *pfdev)
>  	struct devfreq *devfreq;
>  	struct thermal_cooling_device *cooling;
>  	struct panfrost_devfreq *pfdevfreq = &pfdev->pfdevfreq;
> +	struct dev_pm_opp_config config = {
> +		.regulator_names = pfdev->comp->supply_names,
> +		.regulator_count = pfdev->comp->num_supplies,
> +	};
>  
>  	if (pfdev->comp->num_supplies > 1) {
>  		/*
> @@ -101,13 +105,12 @@ int panfrost_devfreq_init(struct panfrost_device *pfdev)
>  		return 0;
>  	}
>  
> -	ret = devm_pm_opp_set_regulators(dev, pfdev->comp->supply_names,
> -					 pfdev->comp->num_supplies);
> +	ret = devm_pm_opp_set_config(dev, &config);
>  	if (ret) {
>  		/* Continue if the optional regulator is missing */
>  		if (ret != -ENODEV) {
>  			if (ret != -EPROBE_DEFER)
> -				DRM_DEV_ERROR(dev, "Couldn't set OPP regulators\n");
> +				DRM_DEV_ERROR(dev, "Couldn't set OPP config\n");
>  			return ret;
>  		}
>  	}