@Elias64Fr
You need to see this! With the
device properties you provided, we can enable Thunderbolt Bus on
Maple Ridge! It therefore looks as if the Maple Ridge controller can be flipped from ICM mode to OS Managed mode without requiring a firmware modification. But before we get too excited, Thunderbolt devices connect, but they do
not actually work!
This is from Asus X570S ProArt Creator (AMD Ryzen) with on-board Maple Ridge:
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NHI0 device properties (left) and
XHC3 device property (right):
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