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usb: cdns3: Enable TDL_CHK only for OUT ep 

commit d6eef886903c4bb5af41b9a31d4ba11dc7a6f8e8 upstream.

ZLP gets stuck if TDL_CHK bit is set and TDL_FROM_TRB is used
as TDL source for IN endpoints. To fix it, TDL_CHK is only
enabled for OUT endpoints.

Fixes: 7733f6c32e ("usb: cdns3: Add Cadence USB3 DRD Driver")
Reported-by: Aswath Govindraju <a-govindraju@ti.com>
Signed-off-by: Sanket Parmar <sparmar@cadence.com>
Link: https://lore.kernel.org/r/1621263912-13175-1-git-send-email-sparmar@cadence.com
Signed-off-by: Peter Chen <peter.chen@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Sanket Parmar 2021-05-17 17:05:12 +02:00 committed by Greg Kroah-Hartman
parent 52b01a8086
commit f53729b828
1 changed files with 3 additions and 5 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

8
drivers/usb/cdns3/gadget.c
View File

@ -1531,7 +1531,7 @@ void cdns3_configure_dmult(struct cdns3_device *priv_dev,
else
mask = BIT(priv_ep->num);
if (priv_ep->type != USB_ENDPOINT_XFER_ISOC) {
if (priv_ep->type != USB_ENDPOINT_XFER_ISOC && !priv_ep->dir) {
cdns3_set_register_bit(&regs->tdl_from_trb, mask);
cdns3_set_register_bit(&regs->tdl_beh, mask);
cdns3_set_register_bit(&regs->tdl_beh2, mask);
@ -1569,15 +1569,13 @@ void cdns3_ep_config(struct cdns3_endpoint *priv_ep)
case USB_ENDPOINT_XFER_INT:
ep_cfg = EP_CFG_EPTYPE(USB_ENDPOINT_XFER_INT);
if ((priv_dev->dev_ver == DEV_VER_V2 && !priv_ep->dir) ||
priv_dev->dev_ver > DEV_VER_V2)
if (priv_dev->dev_ver >= DEV_VER_V2 && !priv_ep->dir)
ep_cfg |= EP_CFG_TDL_CHK;
break;
case USB_ENDPOINT_XFER_BULK:
ep_cfg = EP_CFG_EPTYPE(USB_ENDPOINT_XFER_BULK);
if ((priv_dev->dev_ver == DEV_VER_V2 && !priv_ep->dir) ||
priv_dev->dev_ver > DEV_VER_V2)
if (priv_dev->dev_ver >= DEV_VER_V2 && !priv_ep->dir)
ep_cfg |= EP_CFG_TDL_CHK;
break;
default: