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Set the maximum exit latency to 0 for XHCI USB 3.0 devices, because we

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don't implement link power management, LPM.

This fixes error code XHCI_TRB_ERROR_BANDWIDTH for isochronous USB 3.0
transactions.

Submitted by:	Horse Ma <Shichun.Ma@dell.com>
MFC after:	1 week
Sponsored by:	Mellanox Technologies
This commit is contained in:
hselasky 2020-04-18 15:05:10 +00:00
parent 5cf199bb37
commit 6bfe9f9748
1 changed files with 0 additions and 17 deletions
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17
sys/dev/usb/controller/xhci.c
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@ -2665,23 +2665,6 @@ xhci_configure_device(struct usb_device *udev)
sc->sc_hw.devs[index].nports);
}
switch (udev->speed) {
case USB_SPEED_SUPER:
switch (sc->sc_hw.devs[index].state) {
case XHCI_ST_ADDRESSED:
case XHCI_ST_CONFIGURED:
/* enable power save */
temp |= XHCI_SCTX_1_MAX_EL_SET(sc->sc_exit_lat_max);
break;
default:
/* disable power save */
break;
}
break;
default:
break;
}
xhci_ctx_set_le32(sc, &pinp->ctx_slot.dwSctx1, temp);
temp = XHCI_SCTX_2_IRQ_TARGET_SET(0);