lkml.org 
[lkml]   [2021]   [May]   [24]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
From
SubjectRE: [PATCH] usb: cdns3: Enable TDL_CHK only for OUT ep
Date
> On 21-05-17 17:05:12, Sanket Parmar wrote:
> > 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: 7733f6c32e36 ("usb: cdns3: Add Cadence USB3 DRD Driver")
> > Reported-by: Aswath Govindraju <a-govindraju@ti.com>
> > Signed-off-by: Sanket Parmar <sparmar@cadence.com>
> > ---
> > drivers/usb/cdns3/cdns3-gadget.c | 8 +++-----
> > 1 files changed, 3 insertions(+), 5 deletions(-)
> >
> > diff --git a/drivers/usb/cdns3/cdns3-gadget.c b/drivers/usb/cdns3/cdns3-
> gadget.c
> > index 105855a..f3c0276 100644
> > --- a/drivers/usb/cdns3/cdns3-gadget.c
> > +++ b/drivers/usb/cdns3/cdns3-gadget.c
> > @@ -2007,7 +2007,7 @@ static 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);
> > @@ -2046,15 +2046,13 @@ int cdns3_ep_config(struct cdns3_endpoint
> *priv_ep, bool enable)
> > 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:
> > --
>
> Sanket & Pawel, please confirm this behaviour could apply for DEV_VER_V3,
> that is TDL_CHK can't be used for bulk in for DEV_VER_V3?

Yes, TDL_CHK shouldn't be used for bulk in for DEV_VER_V3.

>
> --
>
> Thanks,
> Peter Chen

\
 
 \ /
  Last update: 2021-05-24 07:40    [W:0.077 / U:0.036 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site