linux-kernel - [PATCH v5 0/6] dt-bindings: msm/dp: Add support for 4 pixel streams

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Message-Id: <20250809-dp_mst_bindings-v5-0-b185fe574f38@oss.qualcomm.com>
Date: Sat, 09 Aug 2025 12:16:14 +0300
From: Dmitry Baryshkov <dmitry.baryshkov@....qualcomm.com>
To: 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>,
        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>, Mahadevan <quic_mahap@...cinc.com>,
        Bjorn Andersson <andersson@...nel.org>,
        Konrad Dybcio <konradybcio@...nel.org>
Cc: linux-arm-msm@...r.kernel.org, dri-devel@...ts.freedesktop.org,
        freedreno@...ts.freedesktop.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org,
        Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>,
        Abhinav Kumar <quic_abhinavk@...cinc.com>,
        Krzysztof Kozlowski <krzk@...nel.org>
Subject: [PATCH v5 0/6] dt-bindings: msm/dp: Add support for 4 pixel
 streams

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.

Note: SC7280 changes depend on clock driver changes and will be posted
---
Changes in v5:
- Removed SC7280-related comments, it has no DP MST support
- Link to v4: https://lore.kernel.org/r/20250809-dp_mst_bindings-v4-0-bb316e638284@oss.qualcomm.com

Changes in v4:
- Picked up series from Jessica by the mutual agreement
- Corrected Rob's tags (Krzysztof)
- Split X1E80100 DP patch (Dmitry)
- Removed SC7280 changes
- Enabled the MST clock on SDM845
- Link to v3: https://lore.kernel.org/r/20250717-dp_mst_bindings-v3-0-72ce08285703@oss.qualcomm.com

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: display/msm: qcom,x1e80100-mdss: correct DP addresses
      dt-bindings: display/msm: dp-controller: add X1E80100
      dt-bindings: display/msm: drop assigned-clock-parents for dp controller
      dt-bindings: display/msm: add stream pixel clock bindings for MST

Dmitry Baryshkov (1):
      dt-bindings: display/msm: dp-controller: allow eDP for SA8775P

Jessica Zhang (1):
      arm64: dts: qcom: Add MST pixel streams for displayport

 .../bindings/display/msm/dp-controller.yaml        | 106 ++++++++++++++++++---
 .../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   |  20 ++--
 arch/arm64/boot/dts/qcom/sa8775p.dtsi              |  34 +++++--
 arch/arm64/boot/dts/qcom/sar2130p.dtsi             |  10 +-
 arch/arm64/boot/dts/qcom/sc8180x.dtsi              |  20 ++--
 arch/arm64/boot/dts/qcom/sc8280xp.dtsi             |  72 +++++++++-----
 arch/arm64/boot/dts/qcom/sdm845.dtsi               |  15 ++-
 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 ++++--
 17 files changed, 304 insertions(+), 103 deletions(-)
---
base-commit: a933d3dc1968fcfb0ab72879ec304b1971ed1b9a
change-id: 20241202-dp_mst_bindings-7536ffc9ae2f

Best regards,
-- 
With best wishes
Dmitry