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usb: dwc3: gadget: Fix ISO transfer performance
Commit08a36b5438
("usb: dwc3: gadget: simplify __dwc3_gadget_ep_queue()") caused a small change in the way ISO transfer is handled in the case when XferInProgress event happens on Isoc EP with an active transfer. This caused a performance degradation of 50%. e.g. using g_webcam on DUT and luvcview on host the video frame rate dropped from 16fps to 8fps @high-speed. Make the ISO transfer handling equivalent to that prior to that commit to get back the original ISO performance numbers. Fixes:08a36b5438
("usb: dwc3: gadget: simplify __dwc3_gadget_ep_queue()") Signed-off-by: Roger Quadros <rogerq@ti.com> Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
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parent
682179592e
commit
f1d6826cae
1 changed files with 11 additions and 1 deletions
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@ -1261,14 +1261,24 @@ static int __dwc3_gadget_ep_queue(struct dwc3_ep *dep, struct dwc3_request *req)
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__dwc3_gadget_start_isoc(dwc, dep, cur_uf);
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__dwc3_gadget_start_isoc(dwc, dep, cur_uf);
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dep->flags &= ~DWC3_EP_PENDING_REQUEST;
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dep->flags &= ~DWC3_EP_PENDING_REQUEST;
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}
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}
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return 0;
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}
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}
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return 0;
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if ((dep->flags & DWC3_EP_BUSY) &&
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!(dep->flags & DWC3_EP_MISSED_ISOC)) {
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WARN_ON_ONCE(!dep->resource_index);
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ret = __dwc3_gadget_kick_transfer(dep,
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dep->resource_index);
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}
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goto out;
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}
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}
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if (!dwc3_calc_trbs_left(dep))
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if (!dwc3_calc_trbs_left(dep))
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return 0;
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return 0;
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ret = __dwc3_gadget_kick_transfer(dep, 0);
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ret = __dwc3_gadget_kick_transfer(dep, 0);
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out:
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if (ret == -EBUSY)
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if (ret == -EBUSY)
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ret = 0;
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ret = 0;
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