Re: [PATCH v1 0/3] console, serial8250: Disable PM and DMA ops

[Tony Lindgren]

* Sebastian Andrzej Siewior <bigeasy@xxxxxxxxxxxxx> [180516 10:49]:
> On 2018-05-16 13:17:36 [+0300], Andy Shevchenko wrote:
> > > The output is usually short so there
> > > shouldn't be much benefit from using it.
> > 
> > > I remember Tony wanted runtime-pm on the kernel console, too. And he
> > > told me explicit how to test it so that it works. Once the UART goes
> > > into PM (down), the whole IP block can go into power save mode. The
> > > board can be woken up by sending a character via the UART. The first few
> > > (incoming / read) characters are lost until the IP block is up again the
> > > frequency stable. This is known / expected.
> > 
> > Don't consider world the OMAP only. The things more complicated if we
> > go out of it. Which I tried to explain in the commit message of patch
> > 2.
> 
> I am not saying the world is OMAP only. I just tried to explain how any
> why it got there and its purpose. I haven't NACKed it. I would believe
> that with that information and Tony not defending his use case or
> possible change it somehow so it is not standing in your way, Greg would
> have enough information to go your way.

The idea breaking PM seems silly to me considering that we've had
it working for years already.

Regards,

Tony