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Message-ID: <cec395c8-83b0-8626-7229-dd8427db48fc@linaro.org>
Date:   Tue, 18 Apr 2023 09:24:36 +0200
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Subject: Re: [PATCH 1/5] dt-bindings: display/msm: Add reg bus interconnect
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To:     Konrad Dybcio <konrad.dybcio@linaro.org>,
        Rob Clark <robdclark@gmail.com>,
        Abhinav Kumar <quic_abhinavk@quicinc.com>,
        Dmitry Baryshkov <dmitry.baryshkov@linaro.org>,
        Sean Paul <sean@poorly.run>, David Airlie <airlied@gmail.com>,
        Daniel Vetter <daniel@ffwll.ch>,
        Rob Herring <robh+dt@kernel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@linaro.org>,
        Krishna Manikandan <quic_mkrishn@quicinc.com>
Cc:     Marijn Suijten <marijn.suijten@somainline.org>,
        linux-arm-msm@vger.kernel.org, dri-devel@lists.freedesktop.org,
        freedreno@lists.freedesktop.org, devicetree@vger.kernel.org,
        linux-kernel@vger.kernel.org
References: <20230417-topic-dpu_regbus-v1-0-06fbdc1643c0@linaro.org>
 <20230417-topic-dpu_regbus-v1-1-06fbdc1643c0@linaro.org>
From:   Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
In-Reply-To: <20230417-topic-dpu_regbus-v1-1-06fbdc1643c0@linaro.org>
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Precedence: bulk

On 17/04/2023 17:30, Konrad Dybcio wrote:
> Apart from the already handled data bus (MAS_MDP_Pn<->DDR), there's
> another path that needs to be handled to ensure MDSS functions properly,
> namely the "reg bus", a.k.a the CPU-MDSS interconnect.
> 
> Gating that path may have a variety of effects.. from none to otherwise
> inexplicable DSI timeouts..
> 
> Describe it in bindings to allow for use in device trees.
> 
> Signed-off-by: Konrad Dybcio <konrad.dybcio@linaro.org>
> ---
>  Documentation/devicetree/bindings/display/msm/mdss-common.yaml | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/Documentation/devicetree/bindings/display/msm/mdss-common.yaml b/Documentation/devicetree/bindings/display/msm/mdss-common.yaml
> index ccd7d6417523..9eb5b6d3e0b9 100644
> --- a/Documentation/devicetree/bindings/display/msm/mdss-common.yaml
> +++ b/Documentation/devicetree/bindings/display/msm/mdss-common.yaml
> @@ -72,6 +72,7 @@ properties:
>      items:
>        - const: mdp0-mem
>        - const: mdp1-mem
> +      - const: cpu-cfg

You added only interconnect-name, not actual interconnect.

Best regards,
Krzysztof