I’ve done several tests. But my Fairphone 3+ always shows up via the logical USB-2.0 hub and with a speed of 480 (tested with Linux-5.10).
# Fairphone 3+
$ cat /sys/bus/usb/devices/2-1.1/speed
480
# USB-3.0 mass storage, connected to the same port
$ cat /sys/bus/usb/devices/4-1.2/speed
5000
# So "2" is the logical USB-2.0 hub and "4" is the logical USB-3.0 hub.
Same results with:
My computer (USB 3.1 PCIe card) via the original Fairphone USB-A to USB-C cable
Does the Fairphone 3+ support 5 Gbit/s USB-3.0 SuperSpeed?
The pins not only need to be connected to something but that something ( USB 3 protocol) has to be worked into the core module by design. I image if it was available then the pins would be there to use it.
That was my guess as well. The connector to the core module has 48 pins (compared to 18 + ground on the FP2 which has mostly the same features in the bottom module), but that seems to be because it’s the same connector used on other FP3 modules as well.
Maybe I wasn’t expressing myself well enough. I was thinking of a new bottom-module that is USB-4 compatible. Similar to the new (FP3+) camera module: they can be swapperd without hardly any effort. Or similar to plugging in a USB-3 PCIe device into the motherboard of a desktop pc. Does that make sense?
The pins not only need to be connected to something but that something ( USB 3 protocol) has to be worked into the core module by design. I image if it was available then the pins would be there to use it.
I think the bottom module is just a connection point all the chips and software, the working parts’ are on the core module.
