Changes between Initial Version and Version 1 of Ticket #20442, comment 4
- Timestamp:
- Jul 5, 2021 7:25:06 AM (3 years ago)
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Ticket #20442, comment 4
initial v1 1 From what I can tell, the port status and control registers show sensible values if I attach a device (device speed, connection state etc.). For a USB2 protocol port, the enable bit (PED) will never switch to 1.1 From what I can tell, the port status and control registers show sensible values if I attach a device (device speed, connection state, port power state, port link state etc.). For a USB2 protocol port, the enable bit (PED) will never switch to 1. 2 2 I guess that's a HC driver problem (for some reason it does not initiate the necessary USB2 sequence to enable a port). 3 3 For USB3 protocol port, the PED bit will switch to 1 but that is done in HW (according to XHCI spec), without involvement of the HC driver.

