Re: [PATCH 1/3] doc: dt: bindings: usb: dwc3: Update entries for disabling SS instances in park mode

[Jun Li]

Hi Neil

As I got the information from Synopsys, this bug exists on current IP versions,
and per my tests with external USB3 hub + 2 Super speed udisks on data
read by dd, I can reproduce this issue with different kernel versions, also I
didn't see obvious performance drop by dd tests after disable park mode for
super speed, so should we just disable it by default so no need a quirk?

Li Jun

Tim <elatllat@xxxxxxxxx> ä2019å11æ11æåä äå8:42åéï
>
> Thanks for working on this Neil,
> Is there something that needs doing for this patch to make it into 5.3 or 5.4?
> As previously mentioned the patch set fixes the issue on affected hardware;
>     https://patchwork.kernel.org/patch/11164515/
>
>
>
> On Wed, Oct 23, 2019 at 4:11 PM Rob Herring <robh@xxxxxxxxxx> wrote:
> >
> > On Mon, Oct 14, 2019 at 04:17:16PM +0200, Neil Armstrong wrote:
> > > This patch updates the documentation with the information related
> > > to the quirks that needs to be added for disabling all SuperSpeed XHCi
> > > instances in park mode.
> > >
> > > CC: Dongjin Kim <tobetter@xxxxxxxxx>
> > > Cc: Jianxin Pan <jianxin.pan@xxxxxxxxxxx>
> > > Reported-by: Tim <elatllat@xxxxxxxxx>
> > > Signed-off-by: Neil Armstrong <narmstrong@xxxxxxxxxxxx>
> > > ---
> > >  Documentation/devicetree/bindings/usb/dwc3.txt | 2 ++
> > >  1 file changed, 2 insertions(+)
> >
> > Sigh, what's one more to the never ending list of quirks...
> >
> > Acked-by: Rob Herring <robh@xxxxxxxxxx>