diff options
| author | Mathias Nyman <mathias.nyman@linux.intel.com> | 2023-01-16 16:22:14 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2023-01-17 16:37:24 +0100 |
| commit | 0522b9a1653048440da5f21747f21e498b9220d1 (patch) | |
| tree | 98cd4422e71f44e59c81650866a99605d90ad06d /drivers/usb/host/xhci.h | |
| parent | 23a3b8d5a2365653fd9bc5a9454d1e7f4facbf85 (diff) | |
| download | linux-0522b9a1653048440da5f21747f21e498b9220d1.tar.bz2 | |
xhci: Add a flag to disable USB3 lpm on a xhci root port level.
One USB3 roothub port may support link power management, while another
root port on the same xHC can't due to different retimers used for
the ports.
This is the case with Intel Alder Lake, and possible future platforms
where retimers used for USB4 ports cause too long exit latecy to
enable native USB3 lpm U1 and U2 states.
Add a flag in the xhci port structure to indicate if the port is
lpm_incapable, and check it while calculating exit latency.
Cc: stable@vger.kernel.org
Signed-off-by: Mathias Nyman <mathias.nyman@linux.intel.com>
Link: https://lore.kernel.org/r/20230116142216.1141605-6-mathias.nyman@linux.intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/usb/host/xhci.h')
| -rw-r--r-- | drivers/usb/host/xhci.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/usb/host/xhci.h b/drivers/usb/host/xhci.h index 3edfacb93817..dcee7f3207ad 100644 --- a/drivers/usb/host/xhci.h +++ b/drivers/usb/host/xhci.h @@ -1735,6 +1735,7 @@ struct xhci_port { int hcd_portnum; struct xhci_hub *rhub; struct xhci_port_cap *port_cap; + unsigned int lpm_incapable:1; }; struct xhci_hub { |