APST not working on Intel p1600x

Andrea Mencarelli andrea3000 at gmail.com
Fri May 23 13:58:53 PDT 2025


> Il giorno 23 mag 2025, alle ore 00:16, Keith Busch <kbusch at kernel.org> ha scritto:
> 
> On Thu, May 22, 2025 at 04:07:15PM -0600, Keith Busch wrote:
>> As to why the driver does this, spec section 8.1.17.2 "Autonomous Power
>> State Transitions" has the answer:
>> 
>> 	The power state to transition to shall be a non-operational
>> 	power state
>> 
>> I'm not sure why the spec decided on that behavior.
> 
> Well, it's that you need more info to capture when to autonomously
> transition to a higher power state when you're already in a degraded
> operational one. Does the device switch to a higher power after one
> command, or should it handle it in its lower operational power state?
> There's no spec guidance here, so the requirement makes sense, but I
> think this could have been sorted out.

Thank you for the clarification.


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