Re: [PATCH 3/4] PM / core: Direct DPM_FLAG_SMART_SUSPEND optimization

From: Rafael J. Wysocki
Date: Tue Dec 19 2017 - 06:19:25 EST

On Tue, Dec 19, 2017 at 12:13 PM, Rafael J. Wysocki <rafael@xxxxxxxxxx> wrote:
> On Tue, Dec 19, 2017 at 8:38 AM, Ulf Hansson <ulf.hansson@xxxxxxxxxx> wrote:
>> On 10 December 2017 at 01:00, Rafael J. Wysocki <rjw@xxxxxxxxxxxxx> wrote:
>>> From: Rafael J. Wysocki <rafael.j.wysocki@xxxxxxxxx>


>> Moreover, what happens when/if a driver that has deployed this
>> solution, starts being used on a new SoC and then additional
>> operations during system suspend becomes required (for example
>> pinctrls that needs to be put in a system sleep state)? Then
>> everything falls apart, doesn't it?
> Then you runtime-resume the device in ->suspend() and the remaining
> callbacks will run for you just fine.

BTW, I guess you'll need a middle layer in that case anyway so that
the driver doesn't have to distinguish between platforms it has to
work with which makes the argument somewhat moot.