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by Dylan16807 794 days ago
I thought the boot config was just an override.

The things I've been searching in the last few minutes suggest that the Pi can negotiate 5A but only if the power supply explicitly offers it as a PDO, which almost nothing does.

But even if that's right, it's almost as bad as not doing PD at all.

Edit: The documentation states "If the Raspberry Pi 5 firmware detects a supported 5A-capable supply, it increases the USB current limit for peripherals to 1.6A, providing 5W of extra power for downstream USB devices, and 5W of extra onboard power budget."

It also confirms no PPS, but it's not entirely dumb.

1 comments

That may indeed be correct at least in some circumstances; maybe it at least works with some capability of the offical supply. In my experience I have had to use usb_max_current_enable=1 and PSU_MAX_CURRENT=5000 to get it to shut up and work.

Here's the thing though; the simple fact that we have to even have this discussion because the Rpi5 continues to be super damn weird is enough evidence for me that the platform has jumped the shark. I don't know whether to blame Broadcom or the Pi Foundation, but the Pi 5 suuuuuucks. Man, I wanted to love it though; it's the only board I have even been been able to buy from them in the last FOUR YEARS

Agreed, I'm very annoyed it doesn't support PPS. A whole host of issues made me buy a small pc instead recently and the price difference was negligible.