linux-kernel - Re: [PATCH] arm64: dts: qcom: x1e80100-hp-x14: drop bogus USB retimer

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Message-ID: <20250402155447.0f41fed3@gollum>
Date: Wed, 2 Apr 2025 15:54:47 +0200
From: Juerg Haefliger <juerg.haefliger@...onical.com>
To: Johan Hovold <johan+linaro@...nel.org>
Cc: 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>, Jens
 Glathe <jens.glathe@...schoolsolutions.biz>, Abel Vesa
 <abel.vesa@...aro.org>, Stephan Gerhold <stephan.gerhold@...aro.org>,
 linux-arm-msm@...r.kernel.org, devicetree@...r.kernel.org,
 linux-kernel@...r.kernel.org
Subject: Re: [PATCH] arm64: dts: qcom: x1e80100-hp-x14: drop bogus USB
 retimer

On Fri, 28 Mar 2025 09:41:54 +0100
Johan Hovold <johan+linaro@...nel.org> wrote:

> Jens reported that the sanity checks added to the new ps883x USB retimer
> driver breaks USB and display on the HP X14. Turns out the X14 only has
> a retimer on one of the ports, but this initially went unnoticed due to
> the missing sanity check (and error handling) in the retimer driver.
> 
> Drop the non-existing retimer from the devicetree to enable the second
> USB port and the display subsystem.
> 
> Note that this also matches the ACPI tables.
> 
> Fixes: 6f18b8d4142c ("arm64: dts: qcom: x1e80100-hp-x14: dt for HP Omnibook X Laptop 14")
> Cc: Jens Glathe <jens.glathe@...schoolsolutions.biz>
> Signed-off-by: Johan Hovold <johan+linaro@...nel.org>

Tested on an HP EliteBook Ultra which is the same HW but in a more
expensive (?) packaging.

Tested-by: Juerg Haefliger <juerg.haefliger@...onical.com>

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