diff options
| author | Felipe Balbi <felipe.balbi@linux.intel.com> | 2016-09-22 11:01:01 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2017-01-06 10:40:11 +0100 |
| commit | 3666b6280351c88592f7d767052d948fc81aeb18 (patch) | |
| tree | cc62f2cc009e665d491e984602fd8307043554bb /drivers/usb/dwc3/gadget.c | |
| parent | 20d7c1a68b5b9fc7fe94c543a9920d9d7234017c (diff) | |
usb: dwc3: gadget: set PCM1 field of isochronous-first TRBs
commit 6b9018d4c1e5c958625be94a160a5984351d4632 upstream.
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.
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/usb/dwc3/gadget.c')
| -rw-r--r-- | drivers/usb/dwc3/gadget.c | 13 |
1 files changed, 11 insertions, 2 deletions
diff --git a/drivers/usb/dwc3/gadget.c b/drivers/usb/dwc3/gadget.c index 1dfa56a5f1c5..b3687e223e00 100644 --- a/drivers/usb/dwc3/gadget.c +++ b/drivers/usb/dwc3/gadget.c @@ -771,6 +771,9 @@ static void dwc3_prepare_one_trb(struct dwc3_ep *dep, unsigned length, unsigned chain, unsigned node) { struct dwc3_trb *trb; + struct dwc3 *dwc = dep->dwc; + struct usb_gadget *gadget = &dwc->gadget; + enum usb_device_speed speed = gadget->speed; dwc3_trace(trace_dwc3_gadget, "%s: req %p dma %08llx length %d%s", dep->name, req, (unsigned long long) dma, @@ -798,10 +801,16 @@ static void dwc3_prepare_one_trb(struct dwc3_ep *dep, break; case USB_ENDPOINT_XFER_ISOC: - if (!node) + if (!node) { trb->ctrl = DWC3_TRBCTL_ISOCHRONOUS_FIRST; - else + + if (speed == USB_SPEED_HIGH) { + struct usb_ep *ep = &dep->endpoint; + trb->size |= DWC3_TRB_SIZE_PCM1(ep->mult - 1); + } + } else { trb->ctrl = DWC3_TRBCTL_ISOCHRONOUS; + } /* always enable Interrupt on Missed ISOC */ trb->ctrl |= DWC3_TRB_CTRL_ISP_IMI; |