From: Konrad Dybcio <konrad.dybcio@oss.qualcomm.com>
To: Xiangxu Yin <xiangxu.yin@oss.qualcomm.com>,
Vinod Koul <vkoul@kernel.org>,
Kishon Vijay Abraham I <kishon@kernel.org>,
Rob Herring <robh@kernel.org>,
Krzysztof Kozlowski <krzk+dt@kernel.org>,
Conor Dooley <conor+dt@kernel.org>,
Rob Clark <robin.clark@oss.qualcomm.com>,
Dmitry Baryshkov <lumag@kernel.org>,
Abhinav Kumar <abhinav.kumar@linux.dev>,
Jessica Zhang <jessica.zhang@oss.qualcomm.com>,
Sean Paul <sean@poorly.run>,
Marijn Suijten <marijn.suijten@somainline.org>,
David Airlie <airlied@gmail.com>, Simona Vetter <simona@ffwll.ch>
Cc: linux-arm-msm@vger.kernel.org, linux-phy@lists.infradead.org,
devicetree@vger.kernel.org, linux-kernel@vger.kernel.org,
dri-devel@lists.freedesktop.org, freedreno@lists.freedesktop.org,
fange.zhang@oss.qualcomm.com, yongxing.mou@oss.qualcomm.com,
li.liu@oss.qualcomm.com,
Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>,
Bjorn Andersson <andersson@kernel.org>,
Konrad Dybcio <konradybcio@kernel.org>
Subject: Re: [PATCH v7 10/14] phy: qcom: qmp-usbc: Add USB/DP exclude handling
Date: Sat, 27 Sep 2025 14:25:48 +0200 [thread overview]
Message-ID: <7cfa782b-07a5-4f0e-9151-44a42c77badc@oss.qualcomm.com> (raw)
In-Reply-To: <20250926-add-displayport-support-for-qcs615-platform-v7-10-dc5edaac6c2b@oss.qualcomm.com>
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@oss.qualcomm.com>
> Signed-off-by: Xiangxu Yin <xiangxu.yin@oss.qualcomm.com>
> ---
Reviewed-by: Konrad Dybcio <konrad.dybcio@oss.qualcomm.com>
Konrad
next prev parent reply other threads:[~2025-09-27 12:25 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-09-26 7:25 [PATCH v7 00/14] Add DisplayPort support for QCS615 platform Xiangxu Yin
2025-09-26 7:25 ` [PATCH v7 01/14] dt-bindings: phy: Add QMP USB3+DP PHY for QCS615 Xiangxu Yin
2025-09-26 7:25 ` [PATCH v7 02/14] phy: qcom: qmp-usbc: Rename USB-specific ops to prepare for DP support Xiangxu Yin
2025-09-26 7:25 ` [PATCH v7 03/14] phy: qcom: qmp-usbc: Add DP-related fields for USB/DP switchable PHY Xiangxu Yin
2025-09-26 7:25 ` [PATCH v7 04/14] phy: qcom: qmp-usbc: Add regulator init_load support Xiangxu Yin
2025-09-26 7:25 ` [PATCH v7 05/14] phy: qcom: qmp-usbc: Move reset config into PHY cfg Xiangxu Yin
2025-09-26 7:25 ` [PATCH v7 06/14] phy: qcom: qmp-usbc: add DP link and vco_div clocks for DP PHY Xiangxu Yin
2025-09-26 7:25 ` [PATCH v7 07/14] phy: qcom: qmp-usbc: Move USB-only init to usb_power_on Xiangxu Yin
2025-09-26 7:25 ` [PATCH v7 08/14] phy: qcom: qmp-usbc: Add TCSR parsing and PHY mode setting Xiangxu Yin
2025-09-26 7:25 ` [PATCH v7 09/14] phy: qcom: qmp-usbc: Add DP PHY ops for USB/DP switchable Type-C PHYs Xiangxu Yin
2025-09-26 7:25 ` [PATCH v7 10/14] phy: qcom: qmp-usbc: Add USB/DP exclude handling Xiangxu Yin
2025-09-27 12:25 ` Konrad Dybcio [this message]
2025-09-26 7:25 ` [PATCH v7 11/14] phy: qcom: qmp: Add DP v2 PHY register definitions Xiangxu Yin
2025-09-26 7:25 ` [PATCH v7 12/14] phy: qcom: qmp-usbc: Add QCS615 USB/DP PHY config and DP mode support Xiangxu Yin
2025-09-26 22:28 ` Dmitry Baryshkov
2025-09-26 7:25 ` [PATCH v7 13/14] drm/msm/dp: move link-specific parsing from dp_panel to dp_link Xiangxu Yin
2025-09-26 7:25 ` [PATCH v7 14/14] drm/msm/dp: Add support for lane mapping configuration Xiangxu Yin
2025-11-14 14:26 ` [PATCH v7 00/14] Add DisplayPort support for QCS615 platform Dmitry Baryshkov
2025-11-26 4:45 ` Xiangxu Yin
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