Messages in this thread | | | Subject | Re: [PATCH 03/17] usb: xhci-mtk: get the microframe boundary for ESIT | From | Sergei Shtylyov <> | Date | Fri, 5 Mar 2021 12:13:33 +0300 |
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Hello!
On 05.03.2021 12:02, Chunfeng Yun wrote:
> Tune the boundary for FS/LS ESIT due to CS: > For ISOC out-ep, the controller starts transfer data after > the first SS; for others, the data is already transfered
Transferred.
> before the last CS. > > Signed-off-by: Chunfeng Yun <chunfeng.yun@mediatek.com> > --- > drivers/usb/host/xhci-mtk-sch.c | 24 +++++++++++++++++++----- > 1 file changed, 19 insertions(+), 5 deletions(-) > > diff --git a/drivers/usb/host/xhci-mtk-sch.c b/drivers/usb/host/xhci-mtk-sch.c > index 8950d1f10a7f..e3b18dfca874 100644 > --- a/drivers/usb/host/xhci-mtk-sch.c > +++ b/drivers/usb/host/xhci-mtk-sch.c > @@ -513,22 +513,35 @@ static void update_sch_tt(struct usb_device *udev, > list_del(&sch_ep->tt_endpoint); > } > > +static u32 get_esit_boundary(struct mu3h_sch_ep_info *sch_ep) > +{ > + u32 boundary = sch_ep->esit; > + > + if (sch_ep->sch_tt) { /* LS/FS with TT */ > + /* tune for CS */ > + if (sch_ep->ep_type != ISOC_OUT_EP) > + boundary += 1;
Why not:
boundary++;
> + else if (boundary > 1) /* normally esit >= 8 for FS/LS */ > + boundary -= 1;
boundary--;
[...]
MBR, Sergei
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