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Message-ID: <20250814224613.GA4052689-robh@kernel.org> Date: Thu, 14 Aug 2025 17:46:13 -0500 From: Rob Herring <robh@...nel.org> To: Dmitry Baryshkov <dmitry.baryshkov@....qualcomm.com> Cc: 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>, 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>, 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> Subject: Re: [PATCH v5 5/6] dt-bindings: display/msm: add stream pixel clock bindings for MST On Sat, Aug 09, 2025 at 12:16:19PM +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 | 72 +++++++++++++++++++++- > .../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, 108 insertions(+), 14 deletions(-) > > diff --git a/Documentation/devicetree/bindings/display/msm/dp-controller.yaml b/Documentation/devicetree/bindings/display/msm/dp-controller.yaml > index 352824c245224d7b5e096770684795625fc9f146..0122592a3ef5fcfe5a5ff8364b2cb6540a37a8ab 100644 > --- a/Documentation/devicetree/bindings/display/msm/dp-controller.yaml > +++ b/Documentation/devicetree/bindings/display/msm/dp-controller.yaml > @@ -58,20 +58,28 @@ properties: > maxItems: 1 > > clocks: > + minItems: 5 > items: > - description: AHB clock to enable register access > - description: Display Port AUX clock > - description: Display Port Link clock > - description: Link interface clock between DP and PHY > - - description: Display Port Pixel clock > + - description: Display Port stream 0 Pixel clock > + - description: Display Port stream 1 Pixel clock > + - description: Display Port stream 2 Pixel clock > + - description: Display Port stream 3 Pixel clock > > clock-names: > + minItems: 5 > items: > - const: core_iface > - const: core_aux > - const: ctrl_link > - const: ctrl_link_iface > - const: stream_pixel > + - const: stream_1_pixel > + - const: stream_2_pixel > + - const: stream_3_pixel > > phys: > maxItems: 1 > @@ -187,6 +195,68 @@ allOf: > required: > - "#sound-dai-cells" > > + - if: > + properties: > + compatible: > + contains: > + enum: > + - qcom,sc7180-dp > + - qcom,sc7280-dp > + - qcom,sc7280-edp > + - qcom,sc8180x-edp > + - qcom,sc8280xp-edp > + - qcom,sm6350-dp > + then: > + properties: > + clocks: > + minItems: 5 > + maxItems: 5 > + else: > + if: > + properties: > + compatible: > + contains: > + enum: > + # some of SA8775P DP controllers support 4 streams MST, > + # others just 2 streams MST > + - qcom,sa8775p-dp > + then: > + oneOf: > + - properties: > + clocks: > + minItems: 8 > + maxItems: 8 > + - properties: > + clocks: > + minItems: 6 > + maxItems: 6 I don't really care if we catch someone putting in 7 clocks. So just do: clocks: minItems: 6 maxItems: 8 > + else: > + if: > + properties: > + compatible: > + contains: > + enum: > + # on these platforms some DP controllers support 2 streams > + # MST, others are SST only > + - qcom,sc8280xp-dp > + - qcom,x1e80100-dp > + then: > + oneOf: > + - properties: > + clocks: > + minItems: 6 > + maxItems: 6 > + - properties: > + clocks: > + minItems: 5 > + maxItems: 5 And here you really didn't need the oneOf. > + else: > + properties: > + clocks: > + minItems: 6 > + maxItems: 6 > + > + > additionalProperties: false > > examples:
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