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

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Message-Id: <20250717-dp_mst_bindings-v3-0-72ce08285703@oss.qualcomm.com>
Date: Thu, 17 Jul 2025 16:28:42 -0700
From: Jessica Zhang <jessica.zhang@....qualcomm.com>
To: 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>,
        Jessica Zhang <jessica.zhang@....qualcomm.com>,
        Danila Tikhonov <danila@...xyga.com>,
        cros-qcom-dts-watchers@...omium.org,
        Rob Clark <robin.clark@....qualcomm.com>
Cc: 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: [PATCH v3 0/5] 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.

---
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
change-id: 20241202-dp_mst_bindings-7536ffc9ae2f

Best regards,
--  
Jessica Zhang <jessica.zhang@....qualcomm.com>