From 69307ccb9ad7ccb653e332de68effdeaaab6907d Mon Sep 17 00:00:00 2001 From: Roger Quadros Date: Fri, 7 Apr 2017 17:57:12 +0300 Subject: usb: xhci: bInterval quirk for TI TUSB73x0 As per [1] issue #4, "The periodic EP scheduler always tries to schedule the EPs that have large intervals (interval equal to or greater than 128 microframes) into different microframes. So it maintains an internal counter and increments for each large interval EP added. When the counter is greater than 128, the scheduler rejects the new EP. So when the hub re-enumerated 128 times, it triggers this condition." This results in Bandwidth error when devices with periodic endpoints (ISO/INT) having bInterval > 7 are plugged and unplugged several times on a TUSB73x0 XHCI host. Workaround this issue by limiting the bInterval to 7 (i.e. interval to 6) for High-speed or faster periodic endpoints. [1] - http://www.ti.com/lit/er/sllz076/sllz076.pdf Cc: stable Signed-off-by: Roger Quadros Signed-off-by: Mathias Nyman Signed-off-by: Greg Kroah-Hartman --- drivers/usb/host/xhci-pci.c | 3 +++ 1 file changed, 3 insertions(+) (limited to 'drivers/usb/host/xhci-pci.c') diff --git a/drivers/usb/host/xhci-pci.c b/drivers/usb/host/xhci-pci.c index fc99f51d12e1..7b86508ac8cf 100644 --- a/drivers/usb/host/xhci-pci.c +++ b/drivers/usb/host/xhci-pci.c @@ -199,6 +199,9 @@ static void xhci_pci_quirks(struct device *dev, struct xhci_hcd *xhci) pdev->device == 0x1042) xhci->quirks |= XHCI_BROKEN_STREAMS; + if (pdev->vendor == PCI_VENDOR_ID_TI && pdev->device == 0x8241) + xhci->quirks |= XHCI_LIMIT_ENDPOINT_INTERVAL_7; + if (xhci->quirks & XHCI_RESET_ON_RESUME) xhci_dbg_trace(xhci, trace_xhci_dbg_quirks, "QUIRK: Resetting on resume"); -- cgit v1.2.3