[Bug 1947933] [NEW] xHCI Port Status Change Event at port powered

[Benjamin David Lunt]

Public bug reported:

Per section 4.19.3 of the xHCI version 1.0 specification, when the Port
Power bit transitions from 0 to 1, if there is a connection on that
port, a Port Status Change Event should be issued.

Currently, when the port is powered, this event is not being issued.

I don't know the QEMU code base well enough to submit a patch, but I
believe that when the port is powered, check to see if there is a
connection (hence, setting the CCS and CSC bits), and then a call to:

xhci_port_notify(port, PORTSC_PLC);

will suffice.

Thank you,
Ben

** Affects: qemu
     Importance: Undecided
         Status: New

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https://bugs.launchpad.net/bugs/1947933

Title:
  xHCI Port Status Change Event at port powered

Status in QEMU:
  New

Bug description:
  Per section 4.19.3 of the xHCI version 1.0 specification, when the
  Port Power bit transitions from 0 to 1, if there is a connection on
  that port, a Port Status Change Event should be issued.

  Currently, when the port is powered, this event is not being issued.

  I don't know the QEMU code base well enough to submit a patch, but I
  believe that when the port is powered, check to see if there is a
  connection (hence, setting the CCS and CSC bits), and then a call to:

  xhci_port_notify(port, PORTSC_PLC);

  will suffice.

  Thank you,
  Ben

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