linux-kernel - Re: [PATCH v7 10/14] phy: qcom: qmp-usbc: Add USB/DP exclude handling

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [day] [month] [year] [list]

Message-ID: <7cfa782b-07a5-4f0e-9151-44a42c77badc@oss.qualcomm.com>
Date: Sat, 27 Sep 2025 14:25:48 +0200
From: Konrad Dybcio <konrad.dybcio@....qualcomm.com>
To: Xiangxu Yin <xiangxu.yin@....qualcomm.com>, 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>,
        Rob Clark
 <robin.clark@....qualcomm.com>,
        Dmitry Baryshkov <lumag@...nel.org>,
        Abhinav Kumar <abhinav.kumar@...ux.dev>,
        Jessica Zhang <jessica.zhang@....qualcomm.com>,
        Sean Paul <sean@...rly.run>,
        Marijn Suijten <marijn.suijten@...ainline.org>,
        David Airlie <airlied@...il.com>, Simona Vetter <simona@...ll.ch>
Cc: linux-arm-msm@...r.kernel.org, linux-phy@...ts.infradead.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        dri-devel@...ts.freedesktop.org, freedreno@...ts.freedesktop.org,
        fange.zhang@....qualcomm.com, yongxing.mou@....qualcomm.com,
        li.liu@....qualcomm.com,
        Dmitry Baryshkov
 <dmitry.baryshkov@....qualcomm.com>,
        Bjorn Andersson <andersson@...nel.org>,
        Konrad Dybcio <konradybcio@...nel.org>
Subject: Re: [PATCH v7 10/14] phy: qcom: qmp-usbc: Add USB/DP exclude handling

On 9/26/25 9:25 AM, Xiangxu Yin wrote:
> When both USB and DP PHY modes are enabled simultaneously on the same
> QMP USBC PHY, it can lead to hardware misconfiguration and undefined
> behavior. This happens because the PHY resources are not designed to
> operate in both modes at the same time.
> 
> To prevent this, introduce a mutual exclusion check between USB and DP
> PHY modes.
> 
> Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@....qualcomm.com>
> Signed-off-by: Xiangxu Yin <xiangxu.yin@....qualcomm.com>
> ---

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

Konrad