From mboxrd@z Thu Jan  1 00:00:00 1970
From: kgene@kernel.org (Kukjin Kim)
Date: Thu, 30 Apr 2015 09:36:23 +0900
Subject: [PATCH 1/1] ARM: dts: Make DP a consumer of DISP1 power domain on
 Exynos5420
In-Reply-To: <55417810.6070202@collabora.co.uk>
References: <1428870659-5525-1-git-send-email-javier.martinez@collabora.co.uk>
 <552F6750.6020306@collabora.co.uk> <55417810.6070202@collabora.co.uk>
Message-ID: <126501d082dd$af818a30$0e849e90$@kernel.org>
To: linux-arm-kernel@lists.infradead.org
List-Id: linux-arm-kernel.lists.infradead.org

Javier Martinez Canillas wrote:
> 
> Hello Kukjin,
> 
Hi,

> On 04/16/2015 09:40 AM, Javier Martinez Canillas wrote:
> >
> > On 04/12/2015 10:30 PM, Javier Martinez Canillas wrote:
> >> Commit ea08de16eb1b ("ARM: dts: Add DISP1 power domain for exynos5420")
> >> added a device node for the Exynos5420 DISP1 power domain but dit not
> >> make the DP controller a consumer of that power domain.
> >>
> >> This causes an "Unhandled fault: imprecise external abort" error if the
> >> exynos-dp driver tries to access the DP controller registers and the PD
> >> was turned off. This lead to a kernel panic and a complete system hang.
> >>
> >> Make the DP controller device node a consumer of the DISP1 power domain
> >> to ensure that the PD is turned on when the exynos-dp driver is probed.
> >>
> >> Fixes: ea08de16eb1b ("ARM: dts: Add DISP1 power domain for exynos5420")
> >> Signed-off-by: Javier Martinez Canillas <javier.martinez@collabora.co.uk>
> >
> > Any comments about this patch?
> >
> > It's very trivial but fixes a very important regression on Exynos5420 boards
> > with display panel and Peach Pit and Pi have been broken since next-20150401.
> >
> > This [0] is the Peach Pit boot log with yesteday's linux-next for example.
> >
> > Best regards,
> > Javier
> >
> > [0]: http://arm-soc.lixom.net/bootlogs/next/next-20150415/pit-arm-exynos_defconfig.html
> >
> 
> It has been many weeks since this patch has been posted and linux-next
> is still broken:
> 
> http://arm-soc.lixom.net/bootlogs/next/next-20150429/pi-arm-exynos_defconfig.html
> 
> Could you please apply $subject to fix the imprecise external abort issue.
> 
Sure I'll in this weekend.

Thanks for your gentle reminder ;-)

- Kukjin