linux-kernel - Re: [RFC v2 0/5] Per-user clock constraints

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Date:	Thu, 10 Jul 2014 10:00:44 +0200
From:	Tomeu Vizoso <tomeu.vizoso@...labora.com>
To:	Tomasz Figa <tomasz.figa@...il.com>,
	Stephen Warren <swarren@...dotorg.org>,
	Thierry Reding <thierry.reding@...il.com>,
	Mike Turquette <mturquette@...aro.org>, rabin@....in,
	linux-tegra@...r.kernel.org, linux-kernel@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org
CC:	Javier Martinez Canillas <javier.martinez@...labora.co.uk>
Subject: Re: [RFC v2 0/5] Per-user clock constraints

On 07/09/2014 10:16 PM, Tomasz Figa wrote:
> Hi Tomeu,
>
> On 03.07.2014 16:38, Tomeu Vizoso wrote:
>> Hello,
>>
>> here is another round for commenting, not very different from the first one.
>>
>> Something I forgot to mention before is that the function rename was performed
>> by the scripts in:
>>
>> http://cgit.collabora.com/git/user/tomeu/linux.git/commit/?h=clk-refactoring-4&id=0e983e28864229f2cd525f87d59e034c4876b233
>>
>> As before, I have only checked that drivers/clk/ builds with allyesconfig, and
>> that a kernel can be built for tegra_defconfig.
>
> This is quite an interesting series. I have reviewed two of five patches
> and have plans to look at remaining ones, however here are few general
> issues I'd like to raise:
>
> - somehow I don't see patch 2/5 on LAKML. Too big?

Yes, I'm not sure what I can do about that, but it's only automated 
function renaming. I'm going to send v3 in a bit and will CC you.

> - I see the series changing particular clock drivers. A good practice
> would be to Cc respective driver maintainers to take a look at those
> changes.

Now that I'm more confident about this approach, for the next version 
I'm going to CC them as well.

> - please make sure that all the patches don't have checkpatch errors or
> significant warnings.

Sure.

> Will try (myself or by asking someone else) to do some testing on
> Samsung platforms.

That will be great, thanks. One scenario I'm looking forward to test 
this with is low system load while the display is being updated often at 
a high resolution.

I would expect to see that the Exynos5 devfreq driver sets a relatively 
low floor frequency, and the DC driver overrides that by setting a 
higher floor, based on the calculated bandwidth that will be required to 
move pixels around.

Regards,

Tomeu

> Best regards,
> Tomasz
>

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