Re: [PATCH 3/8] platform: arm64: qcom-hamoa-ec: Switch fan profile based on power supply state

[Konrad Dybcio]

On 8/19/26 7:19 AM, Anvesh Jain P wrote:
> 
> 
> On 7/30/2026 11:51 AM, Anvesh Jain P wrote:
>>> Is being on a (powerful) charger a prerequisite for entering this profile?
>>> Currently plugging in a 5W charger would trigger the switch as well.
>>>
>>> Should this instead be exposed as a fan profile for userspace?
>>>
>>> Konrad
>> Fair point — power_supply_is_system_supplied() only checks mains
>> presence, not charger wattage, so even a 5W charger triggers the "best
>> performance" profile. And exposing this via platform_profile instead of
>> an automatic AC/battery switch would let userspace make the call
>> instead. Will check on the feasibility of making this possible.
> Even at 5W we're still not battery-constrained, so best performance
> still makes sense, it's about wall power vs battery, not wattage. And I
> don't think userspace needs control over this either, it's just an
> automatic fan curve pick, not a performance setting users would want to
> tune themselves.

I believe fan profile control is very much within the expected
feature scope of a personal computer..

Konrad