linux-kernel - Re: [PATCH v3 01/15] dt-bindings: display/msm: gpu: Document GMU wrapper-equipped A6xx

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Message-ID: <1c4f3f2c-d435-3721-df03-152c6468e0e3@linaro.org>
Date:   Thu, 23 Feb 2023 13:08:40 +0100
From:   Konrad Dybcio <konrad.dybcio@...aro.org>
To:     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>,
        Bjorn Andersson <andersson@...nel.org>,
        Konrad Dybcio <konrad.dybcio@...ainline.org>,
        Akhil P Oommen <quic_akhilpo@...cinc.com>
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, Rob Clark <robdclark@...omium.org>
Subject: Re: [PATCH v3 01/15] dt-bindings: display/msm: gpu: Document GMU
 wrapper-equipped A6xx



On 23.02.2023 13:06, Konrad Dybcio wrote:
> GMU wrapper-equipped A6xx GPUs require clocks and clock-names to be
> specified under the GPU node, just like their older cousins.
> Account for that.
> 
> Signed-off-by: Konrad Dybcio <konrad.dybcio@...aro.org>
> ---
[...]
> -    then: # Since Adreno 6xx series clocks should be defined in GMU
> +            enum:
> +              - qcom,adreno-610.0
> +              - qcom,adreno-619.1
Immediate comment: this could be improved by checking
the compatible of the node referenced in qcom,gmu, but
frankly - I have no idea how to do this / whether it's
possible with schema.

Konrad
> +    then:
>        properties:
> -        clocks: false
> -        clock-names: false
> +        clock-names:
> +          items:
> +            - const: core
> +              description: GPU Core clock
> +            - const: iface
> +              description: GPU Interface clock
> +            - const: mem_iface
> +              description: GPU Memory Interface clock
> +            - const: alt_mem_iface
> +              description: GPU Alternative Memory Interface clock
> +            - const: gmu
> +              description: CX GMU clock
> +            - const: xo
> +              description: GPUCC clocksource clock
> +
> +        reg-names:
> +          minItems: 1
> +          items:
> +            - const: kgsl_3d0_reg_memory
> +            - const: cx_dbgc
> +
> +      required:
> +        - clocks
> +        - clock-names
> +    else:
> +      if:
> +        properties:
> +          compatible:
> +            contains:
> +              pattern: '^qcom,adreno-6[0-9][0-9]\.[0-9]$'
> +
> +      then: # Starting with A6xx, the clocks are usually defined in the GMU node
> +        properties:
> +          clocks: false
> +          clock-names: false
> +
> +          reg-names:
> +            minItems: 1
> +            items:
> +              - const: kgsl_3d0_reg_memory
> +              - const: cx_mem
> +              - const: cx_dbgc
>  
>  examples:
>    - |
>