I was indeed expecting that, so thanks for clearing that upAre you expecting that usb_max_current_enable will magically change to 1 by itself to indicate that the PSU is good for 5A? If yes, you are misguided. That setting can only be changed by human intervention. If you know that the non-PD PSU is up to it, you manually edit that setting and the Pi5 will remove the 600mA restriction.
As per USB-IF specs, USB type A can only deliver up to 2.4Ah (even with type C at the other end), unless some other proprietary protocol is used (such as oneplus warp charge or qualcomm quick charge or huawei supercharge, etc). Note: PD does not work with type A at all.
Since the PI does not support any of those standards, there will be no negociation between the PI and the charger regarding max power to be delivered, so it will default to 2.4Ah.
That being said, even if I know the non-PD PSU is up to it, there's no way it will work at more than 2.4Ah.
As per my current understanding, the only way to fully power the PI5 is to use PD via typeC2typeC cable that's capable of 5v/5Ah and there's is no such cable on the market other than the one from the official power supply (which is non-removable) and another 3rd party power supply (can't remember the name but that's also captive).
Statistics: Posted by drvr42 — Thu Jan 18, 2024 10:42 am