linux-kernel - Re: [PATCH v2 00/10] Exynos IOMMU: proper runtime PM support (use device dependencies)

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Message-ID: <578CB6DB.90608@math.uni-bielefeld.de>
Date:	Mon, 18 Jul 2016 13:00:43 +0200
From:	Tobias Jakobi <tjakobi@...h.uni-bielefeld.de>
To:	Marek Szyprowski <m.szyprowski@...sung.com>,
	linux-pm@...r.kernel.org, linux-kernel@...r.kernel.org,
	iommu@...ts.linux-foundation.org,
	linux-samsung-soc@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org
Cc:	Joerg Roedel <joro@...tes.org>, Inki Dae <inki.dae@...sung.com>,
	Kukjin Kim <kgene@...nel.org>,
	Krzysztof Kozlowski <k.kozlowski@...sung.com>,
	Bartlomiej Zolnierkiewicz <b.zolnierkie@...sung.com>,
	"Rafael J. Wysocki" <rjw@...ysocki.net>,
	Ulf Hansson <ulf.hansson@...aro.org>,
	Mark Brown <broonie@...nel.org>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Subject: Re: [PATCH v2 00/10] Exynos IOMMU: proper runtime PM support (use
 device dependencies)

Hello Marek,


Marek Szyprowski wrote:
> Hi Tobias,
> 
> 
> On 2016-07-15 15:21, Tobias Jakobi wrote:
>> Tobias Jakobi wrote:
>>> Hello Marek,
>>>
>>> I've tested the patchset on 4.7-rc7 and noticed that it breaks reboot on
>>> my ODROID-X2.
>>>
>>> Going to check where exactly things break.
>> Sadly it's the last patch where everything comes together:
>> "iommu/exynos: Add proper runtime pm support"
>>
>> I still have to check if forcing runpm status to 'on' makes a
>> difference. I suspect that the aggressive clock gating might be the
>> reason?
> 
> Thanks for testing. I will check this issue. Could you send me your
> .config?
This is the config I'm currently using:
https://github.com/tobiasjakobi/odroid-environment/blob/master/sourcecode/system/vanilla-4.7-debug.conf

Do you think checking this with no_console_suspend makes sense?

- Tobias


> 
> Best regards