linux-kernel - Re: [PATCH v8 02/11] dt-bindings: dma: Increase iommu maxItems for BAM DMA

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Message-ID: <27b85110-9eb8-84dc-17a9-908e312e2e22@linaro.org>
Date:   Sun, 18 Jun 2023 10:39:02 +0200
From:   Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To:     Bhupesh Sharma <bhupesh.sharma@...aro.org>,
        linux-arm-msm@...r.kernel.org, devicetree@...r.kernel.org
Cc:     agross@...nel.org, linux-kernel@...r.kernel.org,
        linux-crypto@...r.kernel.org, andersson@...nel.org,
        bhupesh.linux@...il.com, robh+dt@...nel.org,
        konrad.dybcio@...aro.org, vladimir.zapolskiy@...aro.org,
        rfoss@...nel.org, neil.armstrong@...aro.org, djakov@...nel.org,
        stephan@...hold.net, Anders Roxell <anders.roxell@...aro.org>,
        Linux Kernel Functional Testing <lkft@...aro.org>
Subject: Re: [PATCH v8 02/11] dt-bindings: dma: Increase iommu maxItems for
 BAM DMA

On 26/05/2023 21:22, Bhupesh Sharma wrote:
> Since SM8450 BAM DMA engine supports five iommu entries,
> increase the maxItems in the iommu property section, without
> which 'dtbs_check' reports the following error:
> 
>   arch/arm64/boot/dts/qcom/sm8450-sony-xperia-nagara-pdx224.dtb:
>     dma-controller@...4000: iommus: is too long

Also, please drop error message, because it is not true. The files do
not have such device node, so you cannot have such warning.

Please rewrite the commit msg to explain that certain devices, e.g.
sm8250, use more iommus.

Best regards,
Krzysztof