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Commit 95d2b037 authored by Vahram Aharonyan's avatar Vahram Aharonyan Committed by Felipe Balbi
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usb: dwc2: gadget: Adjust ISOC OUT request's actual len for DDMA 



In DDMA mode if programmed ISOC OUT transfer length is not DWORD
aligned, after closing descriptor HW leaves value of 4 - (ureq->length %
4) in the RX bytes. This is caused because DMA works using 4B chunks.
Example: if length = 9 and all 9 bytes were received from the bus, after
xfercomplete rx_bytes value is 3. Hence add this value to the amount of
transferred bytes.

Signed-off-by: default avatarVahram Aharonyan <vahrama@synopsys.com>
Signed-off-by: default avatarJohn Youn <johnyoun@synopsys.com>
Signed-off-by: default avatarFelipe Balbi <felipe.balbi@linux.intel.com>
parent ec01f0b2

drivers/usb/dwc2/gadget.c

+4 −0
Original line number Diff line number Diff line
@@ -2001,6 +2001,10 @@ static void dwc2_gadget_complete_isoc_request_ddma(struct dwc2_hsotg_ep *hs_ep) 
	ureq->actual = ureq->length -

		       ((desc_sts & mask) >> DEV_DMA_ISOC_NBYTES_SHIFT);



	/* Adjust actual length for ISOC Out if length is not align of 4 */

	if (!hs_ep->dir_in && ureq->length & 0x3)

		ureq->actual += 4 - (ureq->length & 0x3);



	dwc2_hsotg_complete_request(hsotg, hs_ep, hs_req, 0);

}