[PATCH v2 00/11] platform/chrome: Add DT USB/DP muxing/topology support

[Stephen Boyd]

Quoting Stephen Boyd (2024-08-14 17:34:05)
>
> I'm thinking of working in changes so that the drm_dp_typec_bridge
> registers a 'struct typec_mux_dev' as well. If that is done then we can
> register a drm_dp_typec_bridge from the port manager and let the type-c
> framework drive the pin assignment and orientation directly instead of
> calling it from the port manager layer. To get there I need to add the
> ability for a 'struct typec_mux_dev' to associate with more than one
> typec_port (technically already done) and then make sure that the
> cros_ec_typec driver doesn't try to enable DP altmode on the type-c port
> that isn't muxed for DP. I'm working on this now but I'm sending this
> out to get some feedback because I've reached a good stopping place.
>

I've done this now, and it works well. I've extended the usb-switch.yaml
file to support a third graph endpoint for DP. And I've moved the hpd
notifying and lane remapping to be internal to the drm_dp_typec_bridge
code so that any device that registers the auxiliary device can follow
the usb-switch binding and connect the endpoint to the usb-c-connector
to get hpd notifications and pin assignment basically for free.

I'll send a v3 next week.