From: Pratyush Anand Date: Mon, 21 May 2012 07:12:54 +0000 (+0530) Subject: USB: DWC3: Generate interrupt on each TRB as default option X-Git-Url: http://git.lede-project.org./?a=commitdiff_plain;h=206dd69a62a06197b308fa0decfd0b649fcc2811;p=openwrt%2Fstaging%2Fblogic.git USB: DWC3: Generate interrupt on each TRB as default option Currently in case of isoc, interrupt is programmed after each TRB_NUM/4 ie 8th TRB. A TRB is programmed against each submitted request from gadget. If we do not want to limit the minimum number of necessary request to be submitted from gadget then we must receive interrupt on each TRB submission. There can be such situation with a gadget working with ping-pong buffer. If a gadget does not want to receive interrupt after each request completion then it may set no_interrupt flag. Signed-off-by: Pratyush Anand Signed-off-by: Felipe Balbi --- diff --git a/drivers/usb/dwc3/gadget.c b/drivers/usb/dwc3/gadget.c index a9fc7c4a5a20..be87e82b36c7 100644 --- a/drivers/usb/dwc3/gadget.c +++ b/drivers/usb/dwc3/gadget.c @@ -766,8 +766,7 @@ static void dwc3_prepare_one_trb(struct dwc3_ep *dep, case USB_ENDPOINT_XFER_ISOC: trb->ctrl = DWC3_TRBCTL_ISOCHRONOUS_FIRST; - /* IOC every DWC3_TRB_NUM / 4 so we can refill */ - if (!(cur_slot % (DWC3_TRB_NUM / 4))) + if (!req->request.no_interrupt) trb->ctrl |= DWC3_TRB_CTRL_IOC; break;