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

[Jun Li]

This bug exists on all current versions per information I got from Synopsys.
+ Thinh Nguyen <thinhn@xxxxxxxxxxxx>.

Li Jun

Neil Armstrong <narmstrong@xxxxxxxxxxxx> ä2019å11æ12æåä äå5:00åéï
>
> Hi Li,
>
> On 11/11/2019 02:58, Jun Li wrote:
> > 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?
>
> I don't have any opinion on this, I think the USB & DWC3 maintainers should decide
> how to handle this.
>
> Did Synopsys specified a range of affected IP version ?
>
> Neil
>
> >
> > 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>
>