linux-kernel - Re: [PATCH v6 5/6] dt-bindings: display/msm: add stream pixel clock bindings for MST

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Message-ID: <175572408273.1071685.13722769967964549822.robh@kernel.org>
Date: Wed, 20 Aug 2025 16:08:03 -0500
From: "Rob Herring (Arm)" <robh@...nel.org>
To: Dmitry Baryshkov <dmitry.baryshkov@....qualcomm.com>
Cc: Maxime Ripard <mripard@...nel.org>,
	Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
	Rob Clark <robin.clark@....qualcomm.com>,
	Thomas Zimmermann <tzimmermann@...e.de>,
	freedreno@...ts.freedesktop.org,
	Abhinav Kumar <abhinav.kumar@...ux.dev>,
	Jessica Zhang <jessica.zhang@....qualcomm.com>,
	Marijn Suijten <marijn.suijten@...ainline.org>,
	Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>,
	Sean Paul <sean@...rly.run>, Konrad Dybcio <konradybcio@...nel.org>,
	devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
	Simona Vetter <simona@...ll.ch>,
	Bjorn Andersson <andersson@...nel.org>,
	Dmitry Baryshkov <lumag@...nel.org>,
	Abhinav Kumar <quic_abhinavk@...cinc.com>,
	Abel Vesa <abel.vesa@...aro.org>,
	Mahadevan <quic_mahap@...cinc.com>,
	Kuogee Hsieh <quic_khsieh@...cinc.com>,
	linux-arm-msm@...r.kernel.org, Conor Dooley <conor+dt@...nel.org>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	dri-devel@...ts.freedesktop.org, David Airlie <airlied@...il.com>
Subject: Re: [PATCH v6 5/6] dt-bindings: display/msm: add stream pixel clock
 bindings for MST


On Fri, 15 Aug 2025 17:30:32 +0300, Dmitry Baryshkov wrote:
> From: Abhinav Kumar <quic_abhinavk@...cinc.com>
> 
> On a vast majority of Qualcomm chipsets DisplayPort controller can
> support several MST streams (up to 4x). To support MST these chipsets
> use up to 4 stream pixel clocks for the DisplayPort controller. Expand
> corresponding clock bindings for these platforms and fix example
> schema files to follow updated bindings.
> 
> Note: On chipsets that do support MST, the number of streams supported
> can vary between controllers. For example, SA8775P supports 4 MST
> streams on mdss_dp0 but only 2 streams on mdss_dp1.
> 
> Signed-off-by: Abhinav Kumar <quic_abhinavk@...cinc.com>
> Signed-off-by: Jessica Zhang <jessica.zhang@....qualcomm.com>
> Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@....qualcomm.com>
> ---
>  .../bindings/display/msm/dp-controller.yaml        | 63 +++++++++++++++++++++-
>  .../bindings/display/msm/qcom,sa8775p-mdss.yaml    | 20 +++++--
>  .../bindings/display/msm/qcom,sar2130p-mdss.yaml   | 10 ++--
>  .../bindings/display/msm/qcom,sm8750-mdss.yaml     | 10 ++--
>  .../bindings/display/msm/qcom,x1e80100-mdss.yaml   | 10 ++--
>  5 files changed, 99 insertions(+), 14 deletions(-)
> 

Reviewed-by: Rob Herring (Arm) <robh@...nel.org>