linux-kernel - Re: [PATCH v3 05/12] dt-bindings: display/msm: Add SM6375 MDSS

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Date:   Tue, 16 May 2023 03:26:21 +0200
From:   Konrad Dybcio <konrad.dybcio@...aro.org>
To:     Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>,
        Rob Clark <robdclark@...il.com>,
        Abhinav Kumar <quic_abhinavk@...cinc.com>,
        Dmitry Baryshkov <dmitry.baryshkov@...aro.org>,
        Sean Paul <sean@...rly.run>, David Airlie <airlied@...il.com>,
        Daniel Vetter <daniel@...ll.ch>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Krishna Manikandan <quic_mkrishn@...cinc.com>,
        Will Deacon <will@...nel.org>,
        Robin Murphy <robin.murphy@....com>,
        Joerg Roedel <joro@...tes.org>
Cc:     Marijn Suijten <marijn.suijten@...ainline.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, linux-arm-kernel@...ts.infradead.org,
        iommu@...ts.linux.dev
Subject: Re: [PATCH v3 05/12] dt-bindings: display/msm: Add SM6375 MDSS



On 7.05.2023 10:20, Krzysztof Kozlowski wrote:
> On 05/05/2023 23:40, Konrad Dybcio wrote:
>> Document the SM6375 MDSS.
>>
>> Signed-off-by: Konrad Dybcio <konrad.dybcio@...aro.org>
>> ---
>>  .../bindings/display/msm/qcom,sm6375-mdss.yaml     | 216 +++++++++++++++++++++
>>  1 file changed, 216 insertions(+)
>>
> 
> Thank you for your patch. There is something to discuss/improve.
> 
>> +
>> +examples:
>> +  - |
>> +    #include <dt-bindings/clock/qcom,rpmcc.h>
>> +    #include <dt-bindings/clock/qcom,sm6375-gcc.h>
>> +    #include <dt-bindings/clock/qcom,sm6375-dispcc.h>
>> +    #include <dt-bindings/interrupt-controller/arm-gic.h>
>> +    #include <dt-bindings/power/qcom-rpmpd.h>
>> +
>> +    display-subsystem@...0000 {
>> +        compatible = "qcom,sm6375-mdss";
>> +        reg = <0x05e00000 0x1000>;
>> +        reg-names = "mdss";
>> +
>> +        power-domains = <&dispcc MDSS_GDSC>;
>> +
>> +        clocks = <&gcc GCC_DISP_AHB_CLK>,
>> +                 <&dispcc DISP_CC_MDSS_AHB_CLK>,
>> +                 <&dispcc DISP_CC_MDSS_MDP_CLK>;
>> +        clock-names = "iface", "ahb", "core";
>> +
>> +        interrupts = <GIC_SPI 83 IRQ_TYPE_LEVEL_HIGH>;
>> +        interrupt-controller;
>> +        #interrupt-cells = <1>;
>> +
>> +        iommus = <&apps_smmu 0x820 0x2>;
>> +        #address-cells = <1>;
>> +        #size-cells = <1>;
>> +        ranges;
>> +
>> +        display-controller@...1000 {
>> +            compatible = "qcom,sm6375-dpu";
>> +            reg = <0x05e01000 0x8e030>,
>> +                  <0x05eb0000 0x2008>;
>> +            reg-names = "mdp", "vbif";
>> +
>> +            clocks = <&dispcc DISP_CC_MDSS_AHB_CLK>,
>> +                     <&gcc GCC_DISP_HF_AXI_CLK>,
>> +                     <&dispcc DISP_CC_MDSS_MDP_CLK>,
>> +                     <&dispcc DISP_CC_MDSS_MDP_LUT_CLK>,
>> +                     <&dispcc DISP_CC_MDSS_ROT_CLK>,
>> +                     <&dispcc DISP_CC_MDSS_VSYNC_CLK>,
>> +                     <&gcc GCC_DISP_THROTTLE_CORE_CLK>;
>> +            clock-names = "iface",
>> +                          "bus",
>> +                          "core",
>> +                          "lut",
>> +                          "rot",
>> +                          "vsync",
>> +                          "throttle";
> 
> Are you sure you have clocks in correct order? I see warnings...
Right, testing *both* the DTs and bindings after making changes sounds
like a good thing to stop forgetting..

Konrad
> 
> Best regards,
> Krzysztof
>