Re: [PATCH 1/3] [RFC] PM: domains: Introduce .power_pre/post_on/off callbacks

[Peng Fan <peng.fan@oss.nxp.com>]

On 2/16/2023 6:48 PM, Ulf Hansson wrote:
> On Thu, 16 Feb 2023 at 02:47, Peng Fan <peng.fan@oss.nxp.com> wrote:
>>
>> Hi Ulf,
>>
>> On 1/18/2023 8:55 PM, Ulf Hansson wrote:
>> ...
>>>>
>>>> Honestly I not have idea on how to rework the clk part to avoid holding
>>>> the clk-prepare lock when power on the phy and its power domain.
>>>
>>> I understand. Let me try to prepare a hackish patch that we can use to
>>> run some tests.
>>>
>>> Unfortunately, I can't make any promises for when, but I will do my best.
>>>
>>
>> Have you got time to give a look on this part? Or do you have any
>> suggestions that I could help with?
> 
> I have looked closer at this, but haven't yet got the time to actually
> post a patch. Let me see if I can do some re-prioritization of things
> at my side...
> 
> Anyway, my plan is to post a "hackish" patch that we should use solely
> for testing, to make sure that the approach works. Then, I intend to
> continue to work on the complete solution, which seems to be requiring
> some reworks of locking parts in the clock framework. Although, it's
> too early for me, to say exactly how, so I can't really give you any
> pointers in this regard, sorry.

I overlooked your reply, sorry. Thanks for still working on this.
We have a new SoC has similar design that use blk ctrl which
will need to work as clock controller, while it depends on
power domain. So we will run into same deadlock issue. So I hope
the deadlock issue could be resolved.

Thanks,
Peng.
> 
>>
>> Thanks,
>> Peng.
>>
>>>>
>>>> [1]https://github.com/nxp-imx/linux-imx/commit/c85126180a10439a8c7db1800529b4857d91c609
>>>>
> 
> Kind regards
> Uffe