linux-kernel - Re: [PATCH v18 0/9] Add multiport support for DWC3 controllers

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Date: Tue, 26 Mar 2024 13:37:58 +0100
From: Johan Hovold <johan@...nel.org>
To: Krishna Kurapati <quic_kriskura@...cinc.com>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc: Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
	Rob Herring <robh@...nel.org>,
	Bjorn Andersson <andersson@...nel.org>,
	Wesley Cheng <quic_wcheng@...cinc.com>,
	Konrad Dybcio <konrad.dybcio@...aro.org>,
	Conor Dooley <conor+dt@...nel.org>,
	Thinh Nguyen <Thinh.Nguyen@...opsys.com>,
	Felipe Balbi <balbi@...nel.org>, devicetree@...r.kernel.org,
	linux-arm-msm@...r.kernel.org, linux-usb@...r.kernel.org,
	linux-kernel@...r.kernel.org, quic_ppratap@...cinc.com,
	quic_jackp@...cinc.com
Subject: Re: [PATCH v18 0/9] Add multiport support for DWC3 controllers

On Tue, Mar 26, 2024 at 05:02:44PM +0530, Krishna Kurapati wrote:
> Currently the DWC3 driver supports only single port controller which
> requires at most two PHYs ie HS and SS PHYs. There are SoCs that has
> DWC3 controller with multiple ports that can operate in host mode.
> Some of the port supports both SS+HS and other port supports only HS
> mode.
> 
> This change primarily refactors the Phy logic in core driver to allow
> multiport support with Generic Phy's.
> 
> Changes have been tested on  QCOM SoC SA8295P which has 4 ports (2
> are HS+SS capable and 2 are HS only capable).
> 
> This series depends on removal of ACPI from DWC3 QCOM wrapper [1].

> [1]: https://lore.kernel.org/all/20240305093216.3814787-1-quic_kriskura@quicinc.com/

Just to be clear, this dependency is already in 6.9-rc1 and this series
is ready to be merged.

> Krishna Kurapati (9):
>   dt-bindings: usb: Add bindings for multiport properties on DWC3
>     controller
>   usb: dwc3: core: Access XHCI address space temporarily to read port
>     info
>   usb: dwc3: core: Skip setting event buffers for host only controllers
>   usb: dwc3: core: Refactor PHY logic to support Multiport Controller
>   dt-bindings: usb: qcom,dwc3: Add bindings for SC8280 Multiport
>   usb: dwc3: qcom: Add helper function to request wakeup interrupts
>   usb: dwc3: qcom: Refactor IRQ handling in glue driver
>   usb: dwc3: qcom: Enable wakeup for applicable ports of multiport
>   usb: dwc3: qcom: Add multiport suspend/resume support for wrapper

Johan