Hi, On Mon, Feb 03, 2025 at 01:17:47AM +0000, Mohammad Rahimi wrote: > Since USB4 v2 specification has removed the mandatory requirement to > support TBT3 on a USB4 Dock UFP, the TBT3 Not Supported bit is not > usable, as when it needs to be read there is no USB4 Link. > > This change was introduced in a "USB4 2.0 ENGINEERING CHANGE NOTICE > FORM" published in September 2024, titled "TBT3 Support on USB4 Dock > UFP". I think the USB4 v1 hardware still has this bit and since it is just debugging there is no harm keeping it around.