linux-kernel - Re: [PATCH v6 4/4] arm64: dts: qcom: Add Lenovo ThinkBook 16 G7 QOY device tree

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Message-ID: <1382c27c-66f0-4642-a568-2e86b7c13d7c@oldschoolsolutions.biz>
Date: Sat, 28 Jun 2025 17:22:16 +0200
From: Jens Glathe <jens.glathe@...schoolsolutions.biz>
To: Konrad Dybcio <konrad.dybcio@....qualcomm.com>,
 Bjorn Andersson <andersson@...nel.org>,
 Konrad Dybcio <konradybcio@...nel.org>, Rob Herring <robh@...nel.org>,
 Krzysztof Kozlowski <krzk+dt@...nel.org>, Conor Dooley
 <conor+dt@...nel.org>, Matthias Kaehlcke <mka@...omium.org>,
 Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc: Aleksandrs Vinarskis <alex.vinarskis@...il.com>,
 linux-arm-msm@...r.kernel.org, devicetree@...r.kernel.org,
 linux-kernel@...r.kernel.org, linux-usb@...r.kernel.org
Subject: Re: [PATCH v6 4/4] arm64: dts: qcom: Add Lenovo ThinkBook 16 G7 QOY
 device tree

Hi Konrad,

On 6/14/25 21:39, Konrad Dybcio wrote:
> Looks like DWC3 only does of_platform_populate() ("probe drivers for
> child nodes") in drd.c, and your dt sets everything to host-only..
>
There seems to be a reason for that. [1] Setting the DWC3 host 
controllers to OTG on x1e80100 can lead to hotplug failures with 
SuperSpeed devices. In v7 there will be a hint to this issue.

[1]: 
https://lore.kernel.org/all/20241210111444.26240-1-johan+linaro@kernel.org/

with best regards

Jens