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This will be automatically done by the controller at the time of XferComplete Event. This patch updates the code to issue XferComplete event once all transfers are done by setting LST bit in the ctrl field of the last TRB. Signed-off-by: Anurag Kumar Vulisha --- Changes in v7: 1. Reverted to dep->stream_capable from dep->endpoint.stream_capable Changes in v6: 1. Used dep->endpoint.stream_capable instead of dep->stream_capable flag Changes in v5: 1. None Changes in v4: 1. None Changes in v3: 1. Added the changes suggested by "Thinh Nguyen" Changes in v2: 1. None --- drivers/usb/dwc3/gadget.c | 20 +++++++++++++++++--- 1 file changed, 17 insertions(+), 3 deletions(-) diff --git a/drivers/usb/dwc3/gadget.c b/drivers/usb/dwc3/gadget.c index 3171c24..3edfc0b 100644 --- a/drivers/usb/dwc3/gadget.c +++ b/drivers/usb/dwc3/gadget.c @@ -579,7 +579,8 @@ static int dwc3_gadget_set_ep_config(struct dwc3_ep *dep, unsigned int action) if (usb_ss_max_streams(comp_desc) && usb_endpoint_xfer_bulk(desc)) { params.param1 |= DWC3_DEPCFG_STREAM_CAPABLE - | DWC3_DEPCFG_STREAM_EVENT_EN; + | DWC3_DEPCFG_STREAM_EVENT_EN + | DWC3_DEPCFG_XFER_COMPLETE_EN; dep->stream_capable = true; } @@ -1005,6 +1006,15 @@ static void __dwc3_prepare_one_trb(struct dwc3_ep *dep, struct dwc3_trb *trb, if (chain) trb->ctrl |= DWC3_TRB_CTRL_CHN; + /* + * To issue start transfer on another stream, controller need to free + * previously acquired transfer resource. Setting the LST bit in + * last TRB makes the controller clear transfer resource for that + * endpoint, allowing to start another stream on that endpoint. + */ + else if (dep->stream_capable) + trb->ctrl |= DWC3_TRB_CTRL_LST; + if (usb_endpoint_xfer_bulk(dep->endpoint.desc) && dep->stream_capable) trb->ctrl |= DWC3_TRB_CTRL_SID_SOFN(stream_id); @@ -2276,7 +2286,7 @@ static int dwc3_gadget_ep_reclaim_completed_trb(struct dwc3_ep *dep, if (event->status & DEPEVT_STATUS_SHORT && !chain) return 1; - if (event->status & DEPEVT_STATUS_IOC) + if (event->status & (DEPEVT_STATUS_IOC | DEPEVT_STATUS_LST)) return 1; return 0; @@ -2487,6 +2497,11 @@ static void dwc3_endpoint_interrupt(struct dwc3 *dwc, } switch (event->endpoint_event) { + case DWC3_DEPEVT_XFERCOMPLETE: + if (!dep->stream_capable) + break; + dep->flags &= ~DWC3_EP_TRANSFER_STARTED; + /* Fall Through */ case DWC3_DEPEVT_XFERINPROGRESS: dwc3_gadget_endpoint_transfer_in_progress(dep, event); break; @@ -2505,7 +2520,6 @@ static void dwc3_endpoint_interrupt(struct dwc3 *dwc, if (event->status == DEPEVT_STREAMEVT_FOUND) dwc3_endpoint_stream_event(dwc, event); - case DWC3_DEPEVT_XFERCOMPLETE: case DWC3_DEPEVT_RXTXFIFOEVT: break; }