Re: mt8173-evb: failing to boot in linux-next and mainline

[Matthias Brugger <matthias.bgg-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>]

On 12/04/16 01:12, Kevin Hilman wrote:
> On Mon, Mar 28, 2016 at 10:40 PM, James Liao <jamesjj.liao-NuS5LvNUpcJWk0Htik3J/w@public.gmane.org> wrote:
>> Hi Sascha,
>>
>> On Mon, 2016-03-28 at 08:15 -0700, Kevin Hilman wrote:
>>> Hi Eddie,
>>>
>>> Eddie Huang <eddie.huang-NuS5LvNUpcJWk0Htik3J/w@public.gmane.org> writes:
>>>
>>> [...]
>>>
>>>> Thanks your testing again. I can reproduce your case in my local
>>>> environment using 4.6-rc1. After checking, there are two ways to avoid
>>>> the hang:
>>>> 1. set clk_ignore_unused to kernel command line
>>>> 2. Revert patch "cc8ed76 soc: mediatek: SCPSYS: Fix double enabling of
>>>> regulators"
>>>>
>>>> It seems there is a problem between turn on/off clock and power domain.
>>>> We will try to fix this and send patch to public once have a solution.
>>>
>>> Thanks for verifying.
>>>
>>> I've confirmed that reverting the patch suggested above fixes the
>>> problem.
>>>
>>> Since -rc1 is out, and this problem still exists in mainline, if a
>>> proper fix is not found very soon, I suggest reverting that patch in mainline.
>>>
>>> Kevin
>>
>> According to Eddie and Kevin's test, I think some clocks
>> (mm/mfg/venc/venclt) may be turned off and there are drivers need these
>> clocks without clk_prepare_enable(). But I have no idea to find out what
>> driver causes this issue. So I prefer to revert it on v4.6-rc1. Do you
>> have comments about this issue?
>
> FYI... mt8173-evb is still failing in mainline v4.6-rc3:
>
>     https://kernelci.org/boot/all/job/mainline/kernel/v4.6-rc3/
>
> please fix and/or revert ASAP so this boot regression is not in v4.6 final.
>

Sorry for the late reply. I'm quite busy in my day job ATM.
I just send the revert James proposed as fix.

Regards,
Matthias