linux-kernel - Re: [PATCH v4 3/4] arm64: dts: qcom: sm6125: Add apps

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Message-ID: <292b1bd2-8745-04d1-5d7b-3e201e1ac33b@linaro.org>
Date:   Sat, 17 Dec 2022 15:26:09 +0100
From:   Konrad Dybcio <konrad.dybcio@...aro.org>
To:     Marijn Suijten <marijn.suijten@...ainline.org>,
        phone-devel@...r.kernel.org, Will Deacon <will@...nel.org>,
        Joerg Roedel <joro@...tes.org>,
        Bjorn Andersson <andersson@...nel.org>
Cc:     ~postmarketos/upstreaming@...ts.sr.ht,
        AngeloGioacchino Del Regno 
        <angelogioacchino.delregno@...ainline.org>,
        Konrad Dybcio <konrad.dybcio@...ainline.org>,
        Martin Botka <martin.botka@...ainline.org>,
        Jami Kettunen <jami.kettunen@...ainline.org>,
        Lux Aliaga <they@...t.lgbt>,
        Robin Murphy <robin.murphy@....com>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Andy Gross <agross@...nel.org>,
        Dmitry Baryshkov <dmitry.baryshkov@...aro.org>,
        Thierry Reding <treding@...dia.com>,
        Melody Olvera <quic_molvera@...cinc.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Bhupesh Sharma <bhupesh.sharma@...aro.org>,
        Douglas Anderson <dianders@...omium.org>,
        linux-arm-kernel@...ts.infradead.org, iommu@...ts.linux.dev,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-arm-msm@...r.kernel.org
Subject: Re: [PATCH v4 3/4] arm64: dts: qcom: sm6125: Add apps_smmu with
 streamID to SDHCI 1/2 nodes



On 16.12.2022 22:58, Marijn Suijten wrote:
> When enabling the APPS SMMU the mainline driver reconfigures the SMMU
> from its bootloader configuration, loosing the stream mapping for (among
> which) the SDHCI hardware and breaking its ADMA feature.  This feature
> can be disabled with:
> 
>     sdhci.debug_quirks=0x40
> 
> But it is of course desired to have this feature enabled and working
> through the SMMU.
> 
> Signed-off-by: Marijn Suijten <marijn.suijten@...ainline.org>
> ---
Reviewed-by: Konrad Dybcio <konrad.dybcio@...aro.org>

Konrad
>  arch/arm64/boot/dts/qcom/sm6125.dtsi | 2 ++
>  1 file changed, 2 insertions(+)
> 
> diff --git a/arch/arm64/boot/dts/qcom/sm6125.dtsi b/arch/arm64/boot/dts/qcom/sm6125.dtsi
> index 347665c2067c..f560499cc0ca 100644
> --- a/arch/arm64/boot/dts/qcom/sm6125.dtsi
> +++ b/arch/arm64/boot/dts/qcom/sm6125.dtsi
> @@ -468,6 +468,7 @@ sdhc_1: mmc@...4000 {
>  				 <&gcc GCC_SDCC1_APPS_CLK>,
>  				 <&xo_board>;
>  			clock-names = "iface", "core", "xo";
> +			iommus = <&apps_smmu 0x160 0>;
>  
>  			power-domains = <&rpmpd SM6125_VDDCX>;
>  
> @@ -494,6 +495,7 @@ sdhc_2: mmc@...4000 {
>  				 <&gcc GCC_SDCC2_APPS_CLK>,
>  				 <&xo_board>;
>  			clock-names = "iface", "core", "xo";
> +			iommus = <&apps_smmu 0x180 0>;
>  
>  			pinctrl-0 = <&sdc2_on_state>;
>  			pinctrl-1 = <&sdc2_off_state>;