** Changed in: linux (Ubuntu)
Status: Incomplete => In Progress
** Changed in: linux (Ubuntu)
Assignee: (unassigned) => Tim Gardner (timg-tpi)
** Also affects: linux (Ubuntu Xenial)
Importance: Undecided
Assignee: Tim Gardner (timg-tpi)
Status: In Progress
** Changed in: linux (Ubuntu Xenial)
Status: In Progress => Fix Committed
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https://bugs.launchpad.net/bugs/1519623
Title:
[Feature]USB core and xHCI tasks for USB 3.1 SuperSpeedPlus (SSP)
support for Alpine Ridge on SKL
Status in intel:
In Progress
Status in linux package in Ubuntu:
Fix Committed
Status in linux source package in Xenial:
Fix Committed
Bug description:
USB core expects the roothubs to support the same requests and descriptors as
external hubs. As the two roothubs (USB2 and USB3) are
part of xhci we need to support the descriptor and request changes in
USB3.1. In our case we need to:
1)Fill and return the new SuperSpeedPlus USB Device capability descriptor as
part of the BOS (Binary device Object Store) descritptor. The speed info needed
to fill this descriptor can be parsed from extended capability, supported
protocol PSI lists. (see xhci 1.1 section 7.2)
2)Return the new EXT_PORT_STATUS when usb core requests a get_port_status()
with new option. Can be read from xhci PORTSC register speed field, and map it
to the PSI in the extended capability.Optionally check it from slot output
context?
3) Check if usb core stored SSP (SuperSpeedPlus) isoc endpoint companion
data with the endpoint and use it to calculate max packets and bandwidth.
Upstream:
kernel:4.4
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