Rk3399 - Typec - Extcon

[Shantur Rathore]

Hi Jagan,


On Fri, Dec 8, 2023 at 7:45 AM Jagan Teki <jagan at amarulasolutions.com> wrote:
>
> Hi Shantur,
>
> On Fri, Dec 8, 2023 at 2:42 AM Shantur Rathore <i at shantur.com> 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].
> >
> > 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
>
> 1. Physical Type-C FUSB302: ROC-RK3399-PC (PC, Altmode)
>
> This support PD, and Altmode.
>
> - PD process (including negotiation) is inconsistent in mainline tcpm.
> If we connect PD supply board will (hard reset) reboot and negotiation
> won't happen properly.
>
> 2. Virtual PD (Not related to the type-c connector and FUSB302): ROCK
> 4 Boards (Altmode)
>
> This has to be supported via some fake connector with alt-mode support
> that links to DP as extcon is not the way to go. QC USB has some
> solutions for it but need to find the proper ones.
>
> Da has 6.1 Which fixes step 1 but it becomes not stable in LTS 6.1 and
> Mainline. Suniel has progressed something on this in LTS 6.1 and
> trying to fix TCPM -next.  May be he will push some patches soon on
> the mailing list.
>

Thanks, I will keep an eye.

Regards,
Shantur