# Re: cpuidle on i.MX8MQ

- From: Martin Kepplinger \<hidden\>
- Date: 2021-11-03 12:11:18 
- List: linux-arm-kernel
- Page: https://ratatoskr.run/linux-arm-kernel/2021/11/8813792
- Thread: https://ratatoskr.run/linux-arm-kernel/2021/11/8813732/t.md

```text
Am Dienstag, dem 02.11.2021 um 11:55 +0100 schrieb Alexander Stein:
> Hello,
> 
> I was hit by the errata e11171 on imx8mq on our custom board. I found
> [1] from over 2 years ago, and the even older patchset [2].
> Is there some final conclusion or fix regarding this errata? From
> what
> I understand the proposed change is apparently not acceptable in
> mainline for several reasons. I'm wondering what's the current
> status.
> As suggested at that time, the only solution (right now) is to
> disable
> cpuidle on imx8mq?
> 
> Best regards,
> Alexander
> 
> [1] https://lkml.org/lkml/2019/6/10/350
> [2] https://lkml.org/lkml/2019/3/27/542
> 

Hi Alexander, hi Abel,

At this point my understanding is basically the same. We carry (a
slight variation of) the above in our tree ever since in oder to have
the cpu-sleep sleep state. Not using it is not acceptable to us :)

Until now there's one internal API change we need to revert (bring
back) in order for this to work. For reference, this is our current
implementation:

https://source.puri.sm/martin.kepplinger/linux-next/-/compare/0b90c3622755e0155632d8cc25edd4eb7f875968...ce4803745a180adc8d87891d4ff8dff1c7bd5464

Abel, can you still say that, in case this solution won't apply anymore
in the future, that you would be available to create an update?

Can you even imagine a possibly acceptable solution for mainline to
this? Nothing is completely set in stone with Linux :)

thank you very much,

                                 martin



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