linux-kernel - Re: [PATCH v3 5/5] arm64: dts: qcom: sc7280: Add Reset support for gpu

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Date:   Fri, 19 Aug 2022 09:17:43 +0300
From:   Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To:     Akhil P Oommen <quic_akhilpo@...cinc.com>,
        freedreno <freedreno@...ts.freedesktop.org>,
        dri-devel@...ts.freedesktop.org, linux-arm-msm@...r.kernel.org,
        Rob Clark <robdclark@...il.com>,
        Bjorn Andersson <bjorn.andersson@...aro.org>,
        Stephen Boyd <swboyd@...omium.org>,
        Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
Cc:     Douglas Anderson <dianders@...omium.org>,
        Andy Gross <agross@...nel.org>,
        Konrad Dybcio <konrad.dybcio@...ainline.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Rob Herring <robh+dt@...nel.org>, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v3 5/5] arm64: dts: qcom: sc7280: Add Reset support for
 gpu

On 18/08/2022 23:18, Akhil P Oommen wrote:
> Add support for Reset using GPUCC driver for GPU. This helps to ensure
> that GPU state is reset by making sure that CX head switch is collapsed.
> 
> Signed-off-by: Akhil P Oommen <quic_akhilpo@...cinc.com>
> ---
> 
> (no changes since v1)
> 
>  arch/arm64/boot/dts/qcom/sc7280.dtsi | 3 +++
>  1 file changed, 3 insertions(+)
> 
> diff --git a/arch/arm64/boot/dts/qcom/sc7280.dtsi b/arch/arm64/boot/dts/qcom/sc7280.dtsi
> index e66fc67..f5257d6 100644
> --- a/arch/arm64/boot/dts/qcom/sc7280.dtsi
> +++ b/arch/arm64/boot/dts/qcom/sc7280.dtsi
> @@ -2243,6 +2243,9 @@
>  			nvmem-cells = <&gpu_speed_bin>;
>  			nvmem-cell-names = "speed_bin";
>  
> +			resets = <&gpucc GPU_CX_COLLAPSE>;
> +			reset-names = "cx_collapse";
> +

I think this is not allowed by bindings. Did you test your change with
dtbs_check?

Best regards,
Krzysztof