diff options
| author | Vahram Aharonyan <vahrama@synopsys.com> | 2016-11-14 19:16:46 -0800 |
|---|---|---|
| committer | Felipe Balbi <felipe.balbi@linux.intel.com> | 2016-11-18 13:54:48 +0200 |
| commit | 95d2b0370d3ce21796b98b41d166f6524e3610c6 (patch) | |
| tree | 8a5f3451aba4b6142e5812339e7b0992f28a3c98 /drivers/usb/dwc2/gadget.c | |
| parent | ec01f0b231fc7d910c9d4cf9c435c34537925d95 (diff) | |
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: Vahram Aharonyan <vahrama@synopsys.com>
Signed-off-by: John Youn <johnyoun@synopsys.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
Diffstat (limited to 'drivers/usb/dwc2/gadget.c')
| -rw-r--r-- | drivers/usb/dwc2/gadget.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/usb/dwc2/gadget.c b/drivers/usb/dwc2/gadget.c index 9f2875661bbd..d2442f421485 100644 --- a/drivers/usb/dwc2/gadget.c +++ b/drivers/usb/dwc2/gadget.c @@ -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); } |