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usb: dwc3: gadget: set PCM1 field of isochronous-first TRBs
In case of High-Speed, High-Bandwidth endpoints, we need to tell DWC3 that we have more than one packet per interval. We do that by setting PCM1 field of Isochronous-First TRB. Cc: <stable@vger.kernel.org> Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
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6b9018d4c1
1 changed files with 11 additions and 2 deletions
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@ -771,6 +771,9 @@ static void dwc3_prepare_one_trb(struct dwc3_ep *dep,
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unsigned length, unsigned chain, unsigned node)
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{
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struct dwc3_trb *trb;
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struct dwc3 *dwc = dep->dwc;
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struct usb_gadget *gadget = &dwc->gadget;
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enum usb_device_speed speed = gadget->speed;
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dwc3_trace(trace_dwc3_gadget, "%s: req %p dma %08llx length %d%s",
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dep->name, req, (unsigned long long) dma,
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@ -798,10 +801,16 @@ static void dwc3_prepare_one_trb(struct dwc3_ep *dep,
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break;
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case USB_ENDPOINT_XFER_ISOC:
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if (!node)
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if (!node) {
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trb->ctrl = DWC3_TRBCTL_ISOCHRONOUS_FIRST;
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else
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if (speed == USB_SPEED_HIGH) {
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struct usb_ep *ep = &dep->endpoint;
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trb->size |= DWC3_TRB_SIZE_PCM1(ep->mult - 1);
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}
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} else {
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trb->ctrl = DWC3_TRBCTL_ISOCHRONOUS;
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}
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/* always enable Interrupt on Missed ISOC */
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trb->ctrl |= DWC3_TRB_CTRL_ISP_IMI;
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