linux-kernel - Re: [PATCH v8 01/18] dt-bindings: display/msm: gpu: Document GMU wrapper-equipped A6xx

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Message-ID: <20230530122652.lct6tk6zseny6gxl@krzk-bin>
Date:   Tue, 30 May 2023 14:26:52 +0200
From:   Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To:     Konrad Dybcio <konrad.dybcio@...aro.org>
Cc:     freedreno@...ts.freedesktop.org, Sean Paul <sean@...rly.run>,
        Akhil P Oommen <quic_akhilpo@...cinc.com>,
        devicetree@...r.kernel.org, Bjorn Andersson <andersson@...nel.org>,
        Marijn Suijten <marijn.suijten@...ainline.org>,
        linux-arm-msm@...r.kernel.org, David Airlie <airlied@...il.com>,
        dri-devel@...ts.freedesktop.org, Rob Clark <robdclark@...il.com>,
        Abhinav Kumar <quic_abhinavk@...cinc.com>,
        Conor Dooley <conor+dt@...nel.org>,
        Daniel Vetter <daniel@...ll.ch>,
        Rob Clark <robdclark@...omium.org>,
        Konrad Dybcio <konrad.dybcio@...ainline.org>,
        linux-kernel@...r.kernel.org, Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
Subject: Re: [PATCH v8 01/18] dt-bindings: display/msm: gpu: Document GMU
 wrapper-equipped A6xx

On Mon, 29 May 2023 15:52:20 +0200, Konrad Dybcio wrote:
> The "GMU Wrapper" is Qualcomm's name for "let's treat the GPU blocks
> we'd normally assign to the GMU as if they were a part of the GMU, even
> though they are not". It's a (good) software representation of the GMU_CX
> and GMU_GX register spaces within the GPUSS that helps us programatically
> treat these de-facto GMU-less parts in a way that's very similar to their
> GMU-equipped cousins, massively saving up on code duplication.
> 
> The "wrapper" register space was specifically designed to mimic the layout
> of a real GMU, though it rather obviously does not have the M3 core et al.
> 
> 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>
> ---
>  .../devicetree/bindings/display/msm/gpu.yaml       | 61 ++++++++++++++++++----
>  1 file changed, 52 insertions(+), 9 deletions(-)
> 

Running 'make dtbs_check' with the schema in this patch gives the
following warnings. Consider if they are expected or the schema is
incorrect. These may not be new warnings.

Note that it is not yet a requirement to have 0 warnings for dtbs_check.
This will change in the future.

Full log is available here: https://patchwork.ozlabs.org/patch/1787121


gpu@...0000: compatible: 'oneOf' conditional failed, one must be fixed:
	arch/arm64/boot/dts/qcom/sm8150-hdk.dtb
	arch/arm64/boot/dts/qcom/sm8150-mtp.dtb