From: Guillaume Tucker <guillaume.tucker-ZGY8ohtN/8qB+jHODAdFcQ@public.gmane.org>
To: Marek Szyprowski
<m.szyprowski-Sze3O3UU22JBDgjK7y7TUQ@public.gmane.org>,
Krzysztof Kozlowski
<krzk-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>,
Javier Martinez Canillas
<javierm-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
Cc: linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
Daniel Vetter <daniel.vetter-/w4YWyX8dFk@public.gmane.org>,
Shuah Khan <shuahkh-JPH+aEBZ4P+UEJcrhfAQsw@public.gmane.org>,
devicetree-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
Kukjin Kim <kgene-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>,
Russell King <linux-I+IVW8TIWO2tmTQ+vhA3Yw@public.gmane.org>,
linux-samsung-soc-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
Rob Herring <robh+dt-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>,
Mark Rutland <mark.rutland-5wv7dgnIgG8@public.gmane.org>,
linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org
Subject: Re: [PATCH v2] ARM: dts: exynos: Enable Mixer node for Exynos5800 Peach Pi machine
Date: Tue, 12 Dec 2017 11:07:06 +0000 [thread overview]
Message-ID: <4a8edb50-72cf-8603-8ba5-5176cbef9636@collabora.com> (raw)
In-Reply-To: <1bbedec6-6250-f02a-bf9a-4b9849833de2-Sze3O3UU22JBDgjK7y7TUQ@public.gmane.org>
On 12/12/17 10:55, Marek Szyprowski wrote:
> Hi Guillaume,
>
> On 2017-12-12 11:43, Guillaume Tucker wrote:
>> On 12/12/17 10:17, Marek Szyprowski wrote:
>>> Hi Krzysztof,
>>>
>>> On 2017-12-12 11:09, Krzysztof Kozlowski wrote:
>>>> On Tue, Dec 12, 2017 at 10:55 AM, Krzysztof Kozlowski <krzk-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org> wrote:
>>>>> On Tue, Dec 12, 2017 at 8:42 AM, Javier Martinez Canillas
>>>>> <javierm-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org> wrote:
>>>>>> Commit 1cb686c08d12 ("ARM: dts: exynos: Add status property to Exynos 542x
>>>>>> Mixer nodes") disabled the Mixer node by default in the DTSI and enabled
>>>>>> for each Exynos 542x DTS. But unfortunately it missed to enable it for the
>>>>>> Exynos5800 Peach Pi machine, since the 5800 is also an 542x SoC variant.
>>>>>>
>>>>>> Fixes: 1cb686c08d12 ("ARM: dts: exynos: Add status property to Exynos 542x Mixer nodes")
>>>>>> Signed-off-by: Javier Martinez Canillas <javierm-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
>>>>>> Acked-by: Marek Szyprowski <m.szyprowski-Sze3O3UU22JBDgjK7y7TUQ@public.gmane.org>
>>>>>>
>>>>>> ---
>>>>>>
>>>>>> Changes in v2:
>>>>>> - Remove RFT tag.
>>>>> Thanks guys! However I still would like to see a tested-by for this on
>>>>> Peach Pi (AFAIU, Marek's only acked the code/solution).
>>>> On the other hand I could just apply it for my for-next branch and
>>>> we'll see if it fixes kernel-ci boot tests... Not a nice way of
>>>> testing but apparently no one has Peach Pi.
>>>
>>> Frankly, I don't expect that this will solve the boot hang issue on PeachPi.
>>> However it should at least hide the unbalanced regulator issue.
>>
>> We have a peach-pi in our LAVA lab so I've tested it and
>> actually, it does fix the hang on v4.15-rc3:
>>
>> https://lava.collabora.co.uk/scheduler/job/1019877
>> https://lava.collabora.co.uk/scheduler/job/1019878
>>
>> I ran it twice and it booted both times. I also ran the same
>> boot tests with the same kernel but the dtb from v4.15-rc3
>> without the fix to double check and these failed:
>>
>> https://lava.collabora.co.uk/scheduler/job/1019879
>> https://lava.collabora.co.uk/scheduler/job/1019880
>>
>>
>> Tested-by: Guillaume Tucker <guillaume.tucker-ZGY8ohtN/8qB+jHODAdFcQ@public.gmane.org>
>>
>>
>> Thanks for the fix!
>
> Well, thanks for the test! It proves that there the boot failure is
> caused by an issue somewhere in the error path of Exynos DRM, Analogix
> DP, Simple Panel or other drivers.
>
> This patch simply hides it by fixing the source issue of the Exynos
> DRM initialization failure. :-)
>
> I hope Javier will be able to investigate the discussed hang issue
> later, as fixing it is also imho important.
Sure. This device tree change is needed to get HDMI to work so
it's still a fix for that. Also it's good to know that nothing
else breaks when the driver issue is "hidden". Might be worth
testing on -next as well as it might help spot any new issues
that haven't been merged in mainline yet, or in general give
another data point.
Guillaume
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next prev parent reply other threads:[~2017-12-12 11:07 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-12-12 7:42 [PATCH v2] ARM: dts: exynos: Enable Mixer node for Exynos5800 Peach Pi machine Javier Martinez Canillas
2017-12-12 9:55 ` Krzysztof Kozlowski
2017-12-12 10:09 ` Krzysztof Kozlowski
2017-12-12 10:17 ` Marek Szyprowski
2017-12-12 10:43 ` Guillaume Tucker
[not found] ` <ad03e2a8-00eb-464e-6983-374f83b9abf5-ZGY8ohtN/8qB+jHODAdFcQ@public.gmane.org>
2017-12-12 10:51 ` Javier Martinez Canillas
2017-12-12 10:51 ` Krzysztof Kozlowski
2017-12-12 10:55 ` Marek Szyprowski
[not found] ` <1bbedec6-6250-f02a-bf9a-4b9849833de2-Sze3O3UU22JBDgjK7y7TUQ@public.gmane.org>
2017-12-12 11:07 ` Guillaume Tucker [this message]
2017-12-12 10:40 ` Javier Martinez Canillas
2017-12-12 17:47 ` Krzysztof Kozlowski
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