diff options
| -rw-r--r-- | drivers/usb/host/xhci.c | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/drivers/usb/host/xhci.c b/drivers/usb/host/xhci.c index 8c1126e79d..f9c6bbb9e9 100644 --- a/drivers/usb/host/xhci.c +++ b/drivers/usb/host/xhci.c @@ -1435,8 +1435,15 @@ static int xhci_update_hub_device(struct udevice *dev, struct usb_device *udev) /* Update hub related fields */ slot_ctx->dev_info |= cpu_to_le32(DEV_HUB); - if (hub->tt.multi && udev->speed == USB_SPEED_HIGH) + /* + * refer to section 6.2.2: MTT should be 0 for full speed hub, + * but it may be already set to 1 when setup an xHCI virtual + * device, so clear it anyway. + */ + if (hub->tt.multi) slot_ctx->dev_info |= cpu_to_le32(DEV_MTT); + else if (udev->speed == USB_SPEED_FULL) + slot_ctx->dev_info &= cpu_to_le32(~DEV_MTT); slot_ctx->dev_info2 |= cpu_to_le32(XHCI_MAX_PORTS(udev->maxchild)); /* * Set TT think time - convert from ns to FS bit times. |