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

[Dmitry Baryshkov]

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.


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?

> 
> 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>

-- 
With best wishes
Dmitry