linux-kernel - Re: [PATCH v8 7/9] dt-bindings: display/msm: expand to support MST

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Message-ID: <175693760715.2953637.17179173729112460922.robh@kernel.org>
Date: Wed, 3 Sep 2025 17:13:27 -0500
From: "Rob Herring (Arm)" <robh@...nel.org>
To: Dmitry Baryshkov <dmitry.baryshkov@....qualcomm.com>
Cc: linux-arm-msm@...r.kernel.org, Thomas Zimmermann <tzimmermann@...e.de>,
	Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
	Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>,
	Jessica Zhang <jessica.zhang@....qualcomm.com>,
	Abhinav Kumar <abhinav.kumar@...ux.dev>,
	David Airlie <airlied@...il.com>,
	Abhinav Kumar <quic_abhinavk@...cinc.com>,
	Bjorn Andersson <andersson@...nel.org>, Sean Paul <sean@...rly.run>,
	Marijn Suijten <marijn.suijten@...ainline.org>,
	freedreno@...ts.freedesktop.org, Mahadevan <quic_mahap@...cinc.com>,
	Maxime Ripard <mripard@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>,
	Kuogee Hsieh <quic_khsieh@...cinc.com>,
	Konrad Dybcio <konradybcio@...nel.org>,
	linux-kernel@...r.kernel.org, dri-devel@...ts.freedesktop.org,
	Rob Clark <robin.clark@....qualcomm.com>,
	Dmitry Baryshkov <lumag@...nel.org>,
	Abel Vesa <abel.vesa@...aro.org>, Simona Vetter <simona@...ll.ch>,
	devicetree@...r.kernel.org,
	Krzysztof Kozlowski <krzk+dt@...nel.org>
Subject: Re: [PATCH v8 7/9] dt-bindings: display/msm: expand to support MST


On Wed, 03 Sep 2025 14:58:18 +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 and
> several extra register regions. Expand corresponding region and clock
> bindings for these platforms and fix example schema files to follow
> updated bindings.
> 
> Note: On chipsets that 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        | 103 ++++++++++++++++++++-
>  .../bindings/display/msm/qcom,sa8775p-mdss.yaml    |  26 +++++-
>  .../bindings/display/msm/qcom,sar2130p-mdss.yaml   |  10 +-
>  .../bindings/display/msm/qcom,sc7280-mdss.yaml     |   3 +-
>  .../bindings/display/msm/qcom,sm7150-mdss.yaml     |  10 +-
>  .../bindings/display/msm/qcom,sm8750-mdss.yaml     |  10 +-
>  .../bindings/display/msm/qcom,x1e80100-mdss.yaml   |  10 +-
>  7 files changed, 150 insertions(+), 22 deletions(-)
> 

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