Rk3399 - Typec - Extcon

[Dmitry Baryshkov]

On Fri, 8 Dec 2023 at 06:18, Da Xue <da at lessconfused.com> wrote:
>
> On Thu, Dec 7, 2023 at 7:07 PM Dragan Simic <dsimic at manjaro.org> wrote:
> >
> > Hello Shantur,
> >
> > On 2023-12-07 22:12, Shantur Rathore wrote:
> > > Hi Jagan,
> > >
> > > While trying to figure out issues with Typec AltMode + SuperSpeed on
> > > mainline for Rk3399 based RockPro64, I came across your proposed patch
> > > for TypeC Virtual PD Driver [0].
>
> I went to the FUSB302/TCPM stack issues for ROC-RK3399-PC, see the
> patches needed here
> https://github.com/libre-computer-project/libretech-builder-simple/issues/2#issuecomment-1837269475
>
> A major issue is the lack of a driver in u-boot which causes many
> non-conformant power supplies to time out causing error messages. The
> patches above do their best to keep the stack working despite this.
>
> > >
> > > Would you know if there's been any other development on supporting
> > > Rockchip-TypeC-Phy with FUSB302 boards like RockPro64 or PineBook Pro.
> > >
> > > [0] -
> > > https://lore.kernel.org/lkml/20200904191830.387296-3-jagan@amarulasolutions.com/T/#m7b5d674764379253568a4915f2f9988d74c86593
> >
> > Basically, we need to get rid of the whole extcon hack, as described in
> > the thread linked above, which is a massive job that borders with a
> > complete rewrite.  I'll probably (and hopefully :) dive into all that in
> > the foreseeable future.
>
> extcon is a dead end. Dmitri is using something else for Qualcomm but
> I'm not sure how much overlap there is with the standard TCPM.

On Qualcomm we had standard TCPM (see drivers/usb/typec/tcpm/qcom) or
the crappy version of UCSI (drivers/usb/typec/ucsi/ucsi_glink.c)

-- 
With best wishes
Dmitry