linux-kernel - Re: [PATCH 7/7] devfreq: move statistics to separate struct

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Date:   Wed, 15 Jan 2020 16:56:20 +0100
From:   Bartlomiej Zolnierkiewicz <b.zolnierkie@...sung.com>
To:     Lukasz Luba <lukasz.luba@....com>
Cc:     Chanwoo Choi <cw00.choi@...sung.com>,
        Javi Merino <javi.merino@....com>,
        linux-samsung-soc@...r.kernel.org, linux-pm@...r.kernel.org,
        Kamil Konieczny <k.konieczny@...sung.com>,
        linux-kernel@...r.kernel.org,
        Krzysztof Kozlowski <krzk@...nel.org>,
        Eduardo Valentin <edubezval@...il.com>,
        Kyungmin Park <kyungmin.park@...sung.com>,
        Kukjin Kim <kgene@...nel.org>,
        MyungJoo Ham <myungjoo.ham@...sung.com>,
        Zhang Rui <rui.zhang@...el.com>,
        Ørjan Eide <orjan.eide@....com>,
        linux-arm-kernel@...ts.infradead.org,
        Marek Szyprowski <m.szyprowski@...sung.com>,
        Dietmar Eggemann <dietmar.eggemann@....com>,
        a.hajda@...sung.com, robin.murphy@....com
Subject: Re: [PATCH 7/7] devfreq: move statistics to separate struct


On 12/16/19 2:01 PM, Lukasz Luba wrote:
> Hi Bartek,
> 
> [added Dietmar, Robin, Andrzej (for upcoming DRM drm-misc-next)]
> 
> On 11/15/19 12:40 PM, Bartlomiej Zolnierkiewicz wrote:

[...]

>> Hmmm.. fixing partition_enable_opps() should be trivial but I wonder
>> why we are carrying devfreq_cooling.c code in upstream kernel at all?
> 
> Well, the devfreq_cooling.c is going to have a client in mainline:
> the GPU driver - Panfrost.
> 
> It is already in DRM branch 'drm-misc-next':
> https://patchwork.freedesktop.org/patch/342848/

OK, thanks for explaining this.

> Regarding the devfreq_cooling.c code structure.
> I am currently working on cleaning up the devfreq cooling code and
> adding Energy Model instead for private freq, power tables. It will be
> in similar fashion as it is done in cpufreq_cooling. The model will
> be also simplified so hopefully more clients would come.
> It is under internal review and will be posted shortly.

Great to hear this and thank you for working on it.

Best regards,
--
Bartlomiej Zolnierkiewicz
Samsung R&D Institute Poland
Samsung Electronics