linux-kernel - Re: [PATCH v3 0/5] dt-bindings: msm/dp: Add support for 4 pixel streams

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Message-ID: <lekqhgqzb4iimsu44y54cvxbasux264lbuqsbssj5nd66ocvji@nfuxnyukujjy>
Date: Fri, 18 Jul 2025 12:22:32 +0300
From: Dmitry Baryshkov <dmitry.baryshkov@....qualcomm.com>
To: Jessica Zhang <jessica.zhang@....qualcomm.com>
Cc: Abhinav Kumar <quic_abhinavk@...cinc.com>,
        Dmitry Baryshkov <lumag@...nel.org>, Sean Paul <sean@...rly.run>,
        Marijn Suijten <marijn.suijten@...ainline.org>,
        David Airlie <airlied@...il.com>, Simona Vetter <simona@...ll.ch>,
        Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
        Maxime Ripard <mripard@...nel.org>,
        Thomas Zimmermann <tzimmermann@...e.de>, Rob Herring <robh@...nel.org>,
        Krzysztof Kozlowski <krzk+dt@...nel.org>,
        Conor Dooley <conor+dt@...nel.org>,
        Kuogee Hsieh <quic_khsieh@...cinc.com>,
        Abel Vesa <abel.vesa@...aro.org>,
        Bjorn Andersson <andersson@...nel.org>,
        Michael Turquette <mturquette@...libre.com>,
        Stephen Boyd <sboyd@...nel.org>, Mahadevan <quic_mahap@...cinc.com>,
        Krishna Manikandan <quic_mkrishn@...cinc.com>,
        Konrad Dybcio <konradybcio@...nel.org>,
        Rob Clark <robin.clark@....qualcomm.com>,
        Abhinav Kumar <abhinav.kumar@...ux.dev>,
        Danila Tikhonov <danila@...xyga.com>,
        cros-qcom-dts-watchers@...omium.org,
        Abhinav Kumar <abhinav.kumar@....qualcomm.com>,
        linux-arm-msm@...r.kernel.org, dri-devel@...ts.freedesktop.org,
        freedreno@...ts.freedesktop.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-clk@...r.kernel.org,
        Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>,
        Yongxing Mou <quic_yongmou@...cinc.com>
Subject: Re: [PATCH v3 0/5] dt-bindings: msm/dp: Add support for 4 pixel
 streams

On Thu, Jul 17, 2025 at 04:28:42PM -0700, Jessica Zhang wrote:
> On some MSM chipsets, the display port controller is capable of supporting
> up to 4 streams.
> 
> To drive these additional streams, the pixel clocks for the corresponding
> stream needs to be enabled.
> 
> Fixup the documentation of some of the bindings to clarify exactly which
> stream they correspond to, then add the new bindings and device tree
> changes.
> 
> ---
> Changes in v3:
> - Fixed dtschema errors (Rob Herring)
> - Documented all pixel stream clocks (Dmitry)
> - Ordered compatibility list alphabetically (Dmitry)
> - Dropped assigned-clocks too (Dmitry)
> - Link to v2: https://lore.kernel.org/r/20250530-dp_mst_bindings-v2-0-f925464d32a8@oss.qualcomm.com
> 
> Changes in v2:
> - Rebased on top of next-20250523
> - Dropped merged maintainer patch
> - Added a patch to make the corresponding dts change to add pixel 1
>   stream
> - Squashed pixel 0 and pixel 1 stream binding patches (Krzysztof)
> - Drop assigned-clock-parents bindings for dp-controller (Krzysztof)
> - Updated dp-controller.yaml to include all chipsets that support stream
>   1 pixel clock (Krzysztof)
> - Added missing minItems and if statement (Krzysztof)
> - Link to v1: https://lore.kernel.org/r/20241202-dp_mst_bindings-v1-0-9a9a43b0624a@quicinc.com
> 
> ---
> Abhinav Kumar (4):
>       dt-bindings: Fixup x1e80100 to add DP MST support
>       dt-bindings: clock: Add SC7280 DISPCC DP pixel 1 clock binding
>       dt-bindings: display/msm: drop assigned-clock-parents for dp controller
>       dt-bindings: display/msm: add stream pixel clock bindings for MST
> 
> Jessica Zhang (1):
>       arm64: dts: qcom: Add MST pixel streams for displayport
> 
>  .../bindings/display/msm/dp-controller.yaml        | 53 +++++++++++-----
>  .../bindings/display/msm/qcom,sa8775p-mdss.yaml    | 14 +++--
>  .../bindings/display/msm/qcom,sar2130p-mdss.yaml   | 11 ++--
>  .../bindings/display/msm/qcom,sc7180-mdss.yaml     |  3 -
>  .../bindings/display/msm/qcom,sc7280-mdss.yaml     | 12 ++--
>  .../bindings/display/msm/qcom,sm7150-mdss.yaml     |  5 --
>  .../bindings/display/msm/qcom,sm8750-mdss.yaml     | 11 ++--
>  .../bindings/display/msm/qcom,x1e80100-mdss.yaml   | 21 +++----
>  arch/arm64/boot/dts/qcom/sa8775p.dtsi              | 34 +++++++---
>  arch/arm64/boot/dts/qcom/sar2130p.dtsi             | 10 ++-
>  arch/arm64/boot/dts/qcom/sc7280.dtsi               | 10 ++-
>  arch/arm64/boot/dts/qcom/sc8180x.dtsi              | 20 ++++--
>  arch/arm64/boot/dts/qcom/sc8280xp.dtsi             | 72 +++++++++++++++-------
>  arch/arm64/boot/dts/qcom/sm8150.dtsi               | 10 ++-
>  arch/arm64/boot/dts/qcom/sm8250.dtsi               | 10 ++-
>  arch/arm64/boot/dts/qcom/sm8350.dtsi               | 10 ++-
>  arch/arm64/boot/dts/qcom/sm8450.dtsi               | 10 ++-
>  arch/arm64/boot/dts/qcom/sm8550.dtsi               | 10 ++-
>  arch/arm64/boot/dts/qcom/sm8650.dtsi               | 10 ++-
>  arch/arm64/boot/dts/qcom/x1e80100.dtsi             | 30 ++++++---
>  include/dt-bindings/clock/qcom,dispcc-sc7280.h     |  2 +
>  21 files changed, 235 insertions(+), 133 deletions(-)
> ---
> base-commit: 7a88d609b069b7d2f4d10113b18fea02921bedb1

Can't resolve this commit either in Linus's or in linux-next.

> change-id: 20241202-dp_mst_bindings-7536ffc9ae2f
> 
> Best regards,
> --  
> Jessica Zhang <jessica.zhang@....qualcomm.com>
> 

-- 
With best wishes
Dmitry