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Message-ID: <56221B26.2050407@osg.samsung.com>
Date:	Sat, 17 Oct 2015 11:55:50 +0200
From:	Javier Martinez Canillas <javier@....samsung.com>
To:	Krzysztof Kozlowski <k.kozlowski@...sung.com>,
	Kukjin Kim <kgene@...nel.org>,
	Michael Turquette <mturquette@...libre.com>
Cc:	Tomeu Vizoso <tomeu.vizoso@...labora.com>,
	Stephen Boyd <sboyd@...eaurora.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Gustavo Padovan <gustavo.padovan@...labora.co.uk>,
	Seung-Woo Kim <sw0312.kim@...sung.com>,
	Inki Dae <inki.dae@...sung.com>,
	Kyungmin Park <kyungmin.park@...sung.com>,
	Joonyoung Shim <jy0922.shim@...sung.com>,
	"devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
	Kumar Gala <galak@...eaurora.org>,
	Ian Campbell <ijc+devicetree@...lion.org.uk>,
	linux-samsung-soc <linux-samsung-soc@...r.kernel.org>,
	Sylwester Nawrocki <s.nawrocki@...sung.com>,
	Pawel Moll <pawel.moll@....com>,
	Rob Herring <robh+dt@...nel.org>,
	Mark Rutland <mark.rutland@....com>,
	Tomasz Figa <tomasz.figa@...il.com>, linux-clk@...r.kernel.org,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>
Subject: Re: [PATCH v2 1/2] clk: samsung: exynos5250: Add DISP1 clocks

Hello Krzysztof,

On 10/17/2015 10:53 AM, Krzysztof Kozlowski wrote:
> 2015-10-17 8:41 GMT+09:00 Kukjin Kim <kgene@...nel.org>:

[snip]

>>>
>> So...how can I take 2nd patch of this series in samsung(arm-soc) tree?
>> And this series shouldn't be for fixes for 4.3?...Mike how do you think?
> 
> Stephen acked it so I thought everything will go through samsung-soc.
> 
> Dear Kukjin,
> Indeed this can go as fix for current cycle... but in the same time
> this does not fix any specific regression. Tomeu did not describe when
> issue happened for the first time so I assumed it was like that
> always. It's up to you.
>

Sorry for not answering about this series before but I've been in contact
with Tomeu over IRC before he posted it and since you already added your
Reviewed-by tag, I didn't feel the need do to it.

This is a regression for 4.3 since S2R was working correctly for 4.2 in
Snow, I tested after fixing resume with commit 6fd4899a54a5 ("irqchip:
exynos-combiner: Save IRQ enable set on suspend") and the display was
always enabled on resume.

I don't have access to a Snow anymore to bisect but I think the regression
was introduced by some of the changes in 4.3 to migrate the Exynos DRM to
Atomic Mode Settings. But probably that just exposed a latent bug and it
was working out of luck since I had the same issue than Tomeu in Exynos5420
and was fixed in the same way with commits:

885601002998 ("clk: exynos5420: Add IDs for clocks used in DISP1 power domain")
ea08de16eb1b ("ARM: dts: Add DISP1 power domain for exynos5420")

> Both patches (with Stephen's ack) are in my recent pull request but as
> usual feel free to cherry pick. I'll drop them from next branch then.
> 
> Best regards,
> Krzysztof
> --

Best regards,
-- 
Javier Martinez Canillas
Open Source Group
Samsung Research America
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