Rk3399 - Typec - Extcon

[Da Xue]

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.

>
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