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Commit b765a16a authored by Chunfeng Yun's avatar Chunfeng Yun Committed by Greg Kroah-Hartman
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usb: xhci-mtk: fix bpkts value of LS/HS periodic eps not behind TT 



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: default avatarChunfeng Yun <chunfeng.yun@mediatek.com>
Signed-off-by: default avatarMathias Nyman <mathias.nyman@linux.intel.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent ccc04afb

drivers/usb/host/xhci-mtk-sch.c

+13 −3
Original line number Diff line number Diff line
@@ -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];