linux-kernel - Re: [PATCH v3 0/3] Add support for Tegra Activity Monitor

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Date:	Tue, 09 Dec 2014 15:14:28 +0100
From:	Tomeu Vizoso <tomeu.vizoso@...labora.com>
To:	Alexandre Courbot <gnurou@...il.com>
CC:	"linux-pm@...r.kernel.org" <linux-pm@...r.kernel.org>,
	Javier Martinez Canillas <javier.martinez@...labora.co.uk>,
	"devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	"linux-tegra@...r.kernel.org" <linux-tegra@...r.kernel.org>
Subject: Re: [PATCH v3 0/3] Add support for Tegra Activity Monitor

On 12/09/2014 06:38 AM, Alexandre Courbot wrote:
> On Fri, Dec 5, 2014 at 1:14 AM, Tomeu Vizoso <tomeu.vizoso@...labora.com> wrote:
>> Hello,
>>
>> this v3 addresses the comments that the devfreq implementation got, namely:
>>
>> * Address misc. style issues found by Thierry and Alexander
>> * Added helpers for register i/o
>> * Further documented the structs
>> * Enable the ACTMON after the IRQ handler has been installed
>> * Disable the ACTMON before removing the IRQ handler
>> * Add governor in a subsys initcall
>>
>> There's an open question on whether some functionality currently in this
>> devfreq driver should be moved into the devfreq framework, but without knowing
>> of other SoC family that would benefit from it, I'm reticent. It would be
>> great to hear from the devfreq maintainers if they have any plans regarding
>> this, or if they have any suggestion.
> 
> I cannot make a thorough review because of the problem I mentioned in
> patch 3/3, but I am guessing this series is converging towards what we
> want. Now the main question will be how we can leverage Arto's
> watermark series for this one. I am ready to bet that doing so can
> reduce quite a lot of code.
> 
> Since you are likely to be the first user of the watermarking feature,
> could you comment on its potential shortcomings and whatever needs to
> be fixed to best implement ACTMON support using it? I will try to push
> it myself, but you are obviously in a better position to understand
> what is needed.

Sure, I'm still playing with the idea, but I have sent a few questions
to that thread already.

Cheers,

Tomeu

> Thanks!
> 

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