On 09.01.26 11:13, Janne Grunau wrote:

Ignore USB role switches if dwc3-apple is already in the desired state.
The USB-C port controller on M2 and M1/M2 Pro/Max/Ultra devices issues
additional interrupts which result in USB role switches to the already
active role.
Ignore these USB role switches to ensure the USB-C port controller and
dwc3-apple are always in a consistent state. This matches the behaviour
in __dwc3_set_mode() in core.c.
Fixes detecting USB 2.0 and 3.x devices on the affected systems. The
reset caused by the additional role switch appears to leave the USB
devices in a state which prevents detection when the phy and dwc3 is
brought back up again.

Fixes: 0ec946d32ef7 ("usb: dwc3: Add Apple Silicon DWC3 glue layer driver")
Cc: stable@vger.kernel.org
Signed-off-by: Janne Grunau <j@jannau.net>
---

Reviewed-by: Sven Peter <sven@kernel.org>
Tested-by: Sven Peter <sven@kernel.org> # M1 mac mini and macbook air


thanks,


Sven