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usb: xhci-mtk: fix broken streams issue on 0.96 xHCI

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commit 6f978a30c9bb12dab1302d0f06951ee290f5e600 upstream.

The MediaTek 0.96 xHCI controller on some platforms does not
support bulk stream even HCCPARAMS says supporting, due to MaxPSASize
is set a default value 1 by mistake, here use XHCI_BROKEN_STREAMS
quirk to fix it.

Fixes: 94a631d91ad3 ("usb: xhci-mtk: check hcc_params after adding primary hcd")
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Chunfeng Yun <chunfeng.yun@mediatek.com>
Link: https://lore.kernel.org/r/1616482975-17841-4-git-send-email-chunfeng.yun@mediatek.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Chunfeng Yun 2021-03-23 15:02:46 +08:00 committed by Greg Kroah-Hartman
parent 5dc2a68b1b
commit 7d8a40162e
1 changed files with 9 additions and 1 deletions
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10
drivers/usb/host/xhci-mtk.c
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@ -487,6 +487,13 @@ static void xhci_mtk_quirks(struct device *dev, struct xhci_hcd *xhci)
xhci->quirks |= XHCI_SPURIOUS_SUCCESS;
if (mtk->lpm_support)
xhci->quirks |= XHCI_LPM_SUPPORT;
/*
* MTK xHCI 0.96: PSA is 1 by default even if doesn't support stream,
* and it's 3 when support it.
*/
if (xhci->hci_version < 0x100 && HCC_MAX_PSA(xhci->hcc_params) == 4)
xhci->quirks |= XHCI_BROKEN_STREAMS;
}
/* called during probe() after chip reset completes */
@ -681,7 +688,8 @@ static int xhci_mtk_probe(struct platform_device *pdev)
if (ret)
goto put_usb3_hcd;
if (HCC_MAX_PSA(xhci->hcc_params) >= 4)
if (HCC_MAX_PSA(xhci->hcc_params) >= 4 &&
!(xhci->quirks & XHCI_BROKEN_STREAMS))
xhci->shared_hcd->can_do_streams = 1;
ret = usb_add_hcd(xhci->shared_hcd, irq, IRQF_SHARED);