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usb: xhci-mtk: fix bpkts value of LS/HS periodic eps not behind TT

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when a LS or FS device doesn't connect though a HS hub,
the @bPkts field of its periodic endpoint context should
be set to 1.

Signed-off-by: Chunfeng Yun <chunfeng.yun@mediatek.com>
Signed-off-by: Mathias Nyman <mathias.nyman@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Chunfeng Yun 2016-01-26 17:50:09 +02:00 committed by Greg Kroah-Hartman
parent ccc04afb72
commit b765a16a11
1 changed files with 13 additions and 3 deletions
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16
drivers/usb/host/xhci-mtk-sch.c
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@ -275,8 +275,9 @@ static bool need_bw_sch(struct usb_host_endpoint *ep,
return false;
/*
* for LS & FS periodic endpoints which its device don't attach
* to TT are also ignored, root-hub will schedule them directly
* for LS & FS periodic endpoints which its device is not behind
* a TT are also ignored, root-hub will schedule them directly,
* but need set @bpkts field of endpoint context to 1.
*/
if (is_fs_or_ls(speed) && !has_tt)
return false;
@ -339,8 +340,17 @@ int xhci_mtk_add_ep_quirk(struct usb_hcd *hcd, struct usb_device *udev,
GET_MAX_PACKET(usb_endpoint_maxp(&ep->desc)),
usb_endpoint_dir_in(&ep->desc), ep);
if (!need_bw_sch(ep, udev->speed, slot_ctx->tt_info & TT_SLOT))
if (!need_bw_sch(ep, udev->speed, slot_ctx->tt_info & TT_SLOT)) {
/*
* set @bpkts to 1 if it is LS or FS periodic endpoint, and its
* device does not connected through an external HS hub
*/
if (usb_endpoint_xfer_int(&ep->desc)
|| usb_endpoint_xfer_isoc(&ep->desc))
ep_ctx->reserved[0] |= cpu_to_le32(EP_BPKTS(1));
return 0;
}
bw_index = get_bw_index(xhci, udev, ep);
sch_bw = &sch_array[bw_index];