Re: [PATCH 0/3] Add USB role switch support to DWC2

[Alexandre Torgue]

Hi AmÃlie

On 6/16/20 4:07 PM, Amelie Delaunay wrote:
> When using usb-c connector (but it can also be the case with a micro-b
> connector), iddig, avalid, bvalid, vbusvalid input signals may not be
> connected to the DWC2 OTG controller.
> DWC2 OTG controller features an overriding control of the PHY voltage valid
> and ID input signals.
> So, missing signals can be forced using usb role from usb role switch and
> this override feature.
>
> This series adds support for usb role switch to dwc2, by using overriding
> control of the PHY voltage valid and ID input signals.
>
> It has been tested on stm32mp157c-dk2 [1], which has a Type-C connector
> managed by a Type-C port controller, and connected to USB OTG controller.
>
> [1] https://www.st.com/en/evaluation-tools/stm32mp157c-dk2.html
>
> Amelie Delaunay (3):
>    usb: dwc2: override PHY input signals with usb role switch support
>    usb: dwc2: don't use ID/Vbus detection if usb-role-switch on STM32MP15
>      SoCs
>    ARM: dts: stm32: enable usb-role-switch on USB OTG on stm32mp15xx-dkx
>
>   arch/arm/boot/dts/stm32mp15xx-dkx.dtsi |   2 +-
>   drivers/usb/dwc2/Kconfig               |   1 +
>   drivers/usb/dwc2/Makefile              |   2 +-
>   drivers/usb/dwc2/core.h                |   8 ++
>   drivers/usb/dwc2/drd.c                 | 190 +++++++++++++++++++++++++
>   drivers/usb/dwc2/gadget.c              |   2 +-
>   drivers/usb/dwc2/params.c              |   4 +-
>   drivers/usb/dwc2/platform.c            |  13 ++
>   8 files changed, 218 insertions(+), 4 deletions(-)
>   create mode 100644 drivers/usb/dwc2/drd.c

DT patch applied on stm32-next.

Thanks
Alex