linux-kernel - Re: [PATCH v6 2/3] phy: qcom: qmp-combo: get the USB3 & DisplayPort lanes mapping from DT

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Message-ID: <06f74fee-9ab5-4b26-9497-9f617edd97f0@oss.qualcomm.com>
Date: Wed, 22 Oct 2025 18:38:25 +0200
From: Konrad Dybcio <konrad.dybcio@....qualcomm.com>
To: Neil Armstrong <neil.armstrong@...aro.org>, Vinod Koul
 <vkoul@...nel.org>,
        Kishon Vijay Abraham I <kishon@...nel.org>,
        Rob Herring <robh@...nel.org>,
        Krzysztof Kozlowski <krzk+dt@...nel.org>,
        Conor Dooley <conor+dt@...nel.org>,
        Bjorn Andersson <andersson@...nel.org>,
        Konrad Dybcio <konradybcio@...nel.org>
Cc: Xilin Wu <sophon@...xa.com>, linux-arm-msm@...r.kernel.org,
        linux-phy@...ts.infradead.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org,
        Dmitry Baryshkov <dmitry.baryshkov@....qualcomm.com>
Subject: Re: [PATCH v6 2/3] phy: qcom: qmp-combo: get the USB3 & DisplayPort
 lanes mapping from DT

On 10/13/25 10:55 AM, Neil Armstrong wrote:
> The QMP USB3/DP Combo PHY hosts an USB3 phy and a DP PHY on top
> of a combo glue to route either lanes to the 4 shared physical lanes.
> 
> The routing of the lanes can be:
> - 2 DP + 2 USB3
> - 4 DP
> - 2 USB3
> 
> Get the lanes mapping from DT and stop registering the USB-C
> muxes in favor of a static mode and orientation detemined
> by the lanes mapping.
> 
> This allows supporting boards with direct connection of USB3 and
> DisplayPort lanes to the QMP Combo PHY lanes, not using the
> USB-C Altmode feature.
> 
> Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@....qualcomm.com>
> Tested-by: Xilin Wu <sophon@...xa.com> # qcs6490-radxa-dragon-q6a
> Signed-off-by: Neil Armstrong <neil.armstrong@...aro.org>
> ---

Reviewed-by: Konrad Dybcio <konrad.dybcio@....qualcomm.com>

Konrad