Re: [PATCH RFC 00/12] Qualcomm Type-C support for 1st generation

[David Heidelberg]

On 27/09/2026 15:05, Dmitry Baryshkov wrote:
> On Sat, Sep 26, 2026 at 02:40:19PM +0200, David Heidelberg via B4 Relay wrote:
> > This series adds basic USB Type-C support for 1st gen devices, covering
> > configurations that do not require VBUS power (e.g. devices using
> > externally powered docks).
> >
> > VBUS support will be added in a follow-up series after this one is merged.
> > Supporting VBUS will likely require refactoring parts of the SMBX charger
> > support, which is why it is not included here.
> >
> > Tested with an externally powered dock station:
> >
> >   - Pixel 3 / 3 XL
> >   - SHIFT 6mq
> >   - OnePlus 6
> >
> > Tested with an additional, not-yet-included VBUS patch for non-powered
> > devices:
> >
> >   - Xiaomi Redmi Note 7
> >   - Xiaomi Mi Pad 4
>
> THis is very interesting, as it will also unblock DisplayPort support on
> devices from those generations.

Yes, DP works with some minor adjustment there and there (going to be follow-up)

> One major comment. As we see, on SMB2 PMICs parts of the Type-C
> functionality are provided by the charger / FG device. I guess that on
> SMB5 PMICs we will get the same problem once somebody tries to implement
> additional charger features. Would it make sense to rework the PMIC TCPM
> driver to be a composite driver, taking several components via the
> existing Linux interface?

As this gets decided from the QCOM side, I'm fine with whatever suits the 
hardware best.

David

> > Credits to everyone who has contributed to Type-C enablement before:
> >
> >   Casey Connolly
> >   Zachary Dry — LLM generation and testing
> >   Max Furman — LLM generation and testing
> >
> > Signed-off-by: David Heidelberg <david@xxxxxxx>