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

[Kevin Hilman]

On Wed, Apr 13, 2016 at 3:15 AM, Matthias Brugger
<matthias.bgg at gmail.com> wrote:
>
>
> On 12/04/16 01:12, Kevin Hilman wrote:
>>
>> On Mon, Mar 28, 2016 at 10:40 PM, James Liao <jamesjj.liao at mediatek.com>
>> wrote:
>>>
>>> Hi Sascha,
>>>
>>> On Mon, 2016-03-28 at 08:15 -0700, Kevin Hilman wrote:
>>>>
>>>> Hi Eddie,
>>>>
>>>> Eddie Huang <eddie.huang at mediatek.com> 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.
>

Thanks, I just tried your branch with arm-soc/for-next and mt8173-evb
is booting again.  Thanks.

Kevin