linux-kernel - Re: [PATCH 1/1] Revert "ARM: dts: add display power domain for exynos5250"

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Date:	Thu, 30 Apr 2015 07:59:09 -0700
From:	Kevin Hilman <khilman@...nel.org>
To:	Javier Martinez Canillas <javier.martinez@...labora.co.uk>
Cc:	Sjoerd Simons <sjoerd.simons@...labora.co.uk>,
	Kukjin Kim <kgene@...nel.org>, Olof Johansson <olof@...om.net>,
	Andreas Färber <afaerber@...e.de>,
	Marek Szyprowski <m.szyprowski@...sung.com>,
	Doug Anderson <dianders@...omium.org>,
	Andrzej Hajda <a.hajda@...sung.com>,
	linux-samsung-soc@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
	inki.dae@...sung.com
Subject: Re: [PATCH 1/1] Revert "ARM: dts: add display power domain for exynos5250"

Javier Martinez Canillas <javier.martinez@...labora.co.uk> writes:

> Hello,
>
> On 04/29/2015 09:45 PM, Sjoerd Simons wrote:
>> On Wed, 2015-04-29 at 10:40 -0700, Kevin Hilman wrote:
>>> Javier Martinez Canillas <javier.martinez@...labora.co.uk> writes:
>> 
>>> Tested-by: Kevin Hilman <khilman@...aro.org>
>>> 
>>> FWIW, this patch fixes the boot panics when using MMC rootfs on
>>> exynos5800-peach-pi with current linux-next that have been happening
>>> for awhile.
>> 
>> That seems unlikely as this patch changes things in the exynos5250.dtsi,
>> which isn't used by exynos5800-peach-pi.?
>>
>
> Indeed, it will be surprising if $subject changes any behavior on
> Exynos5420/5422/5800 machines.
>
> FWIW, this patch is not needed anymore since the right fix is Krzysztof's
> "drm/exynos: Enable DP clock to fix display on Exynos5250 and other" patch
> which is already in linux-next.
>
> The regression on Exynos5420/5422/5800 that has been for a while is fixed
> by "ARM: dts: Make DP a consumer of DISP1 power domain on Exynos5420" [0]
> which has been posted many weeks ago.

Thanks for clarifying.

I'm not sure how this worked for me.  Seems like sometimes, even with
the imprecise aborts it does actually finish booting to a shell, so I
must've gotten successful boot and thought it was because of this
revert.

Kevin
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