linux-kernel - Re: [PATCH 1/5] arm64: dts: qcom: sc8280xp: Add missing dwc3 quirks

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Date:   Wed, 29 Mar 2023 14:15:54 +0200
From:   Johan Hovold <johan@...nel.org>
To:     Konrad Dybcio <konrad.dybcio@...aro.org>
Cc:     Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>,
        andersson@...nel.org, Thinh.Nguyen@...opsys.com,
        gregkh@...uxfoundation.org, mathias.nyman@...el.com,
        robh+dt@...nel.org, krzysztof.kozlowski+dt@...aro.org,
        linux-arm-msm@...r.kernel.org, linux-usb@...r.kernel.org,
        linux-kernel@...r.kernel.org, devicetree@...r.kernel.org,
        stable@...r.kernel.org
Subject: Re: [PATCH 1/5] arm64: dts: qcom: sc8280xp: Add missing dwc3 quirks

On Wed, Mar 29, 2023 at 01:24:27PM +0200, Konrad Dybcio wrote:
> On 29.03.2023 10:34, Johan Hovold wrote:

> > Perhaps keeping all of these in in the dtsi is correct, but that's going
> > to need some more motivation than simply that some vendor does so (as
> > they often do all sorts of things they should not).

> I'm looking at the DWC3 code and admittedly I don't understand much,
> but is there any harm to keeping them? What if somebody decides to
> plug in a laptop as a gadget device?

We should the add the bits that are really needed with a proper
descriptions of what they do (like all commit messages should).

Besides the commit message, the problem here is that these have just
been copied from some vendor kernel and some properties are conflicting
(e.g. both disabling LPM and configuring LPM settings) while others
appear to be application specific.

Johan