linux-kernel - Re: [PATCH 06/15] dt-bindings: display/msm: sc7180-dpu: Describe SM6125

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Message-ID: <75d64lixeawfoqbrctm4thzh73cxkvnlmnh5xgbpf277pmh3gz@zthnqvvuxmeq>
Date:   Sun, 25 Jun 2023 21:52:21 +0200
From:   Marijn Suijten <marijn.suijten@...ainline.org>
To:     Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
Cc:     Andy Gross <agross@...nel.org>,
        Bjorn Andersson <andersson@...nel.org>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Conor Dooley <conor+dt@...nel.org>,
        Michael Turquette <mturquette@...libre.com>,
        Stephen Boyd <sboyd@...nel.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>,
        Krishna Manikandan <quic_mkrishn@...cinc.com>,
        ~postmarketos/upstreaming@...ts.sr.ht,
        AngeloGioacchino Del Regno 
        <angelogioacchino.delregno@...labora.com>,
        Konrad Dybcio <konrad.dybcio@...aro.org>,
        Martin Botka <martin.botka@...ainline.org>,
        Jami Kettunen <jami.kettunen@...ainline.org>,
        linux-arm-msm@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org,
        Krzysztof Kozlowski <krzk@...nel.org>,
        linux-clk@...r.kernel.org, dri-devel@...ts.freedesktop.org,
        freedreno@...ts.freedesktop.org, Lux Aliaga <they@...t.lgbt>
Subject: Re: [PATCH 06/15] dt-bindings: display/msm: sc7180-dpu: Describe
 SM6125

On 2023-06-24 11:12:52, Krzysztof Kozlowski wrote:
> On 24/06/2023 02:41, Marijn Suijten wrote:
> > SM6125 is identical to SM6375 except that while downstream also defines
> > a throttle clock, its presence results in timeouts whereas SM6375
> > requires it to not observe any timeouts.
> 
> Then it should not be allowed, so you need either "else:" block or
> another "if: properties: compatible:" to disallow it. Because in current
> patch it would be allowed.

That means this binding is wrong/incomplete for all other SoCs then.
clock(-name)s has 6 items, and sets `minItems: 6`.  Only for sm6375-dpu
does it set `minItems: 7`, but an else case is missing.

Shall I send a Fixes: ed41005f5b7c ("dt-bindings: display/msm:
sc7180-dpu: Describe SM6350 and SM6375") for that, and should maxItems:
6 be the default under clock(-name)s or in an else:?

- Marijn