linux-kernel - Re: [PATCH RFC 1/2] arm64: dts: qcom: msm8953: Add GPU IOMMU

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Message-ID: <6009977.lOV4Wx5bFT@z3ntu.xyz>
Date: Sat, 27 Jan 2024 18:24:46 +0100
From: Luca Weiss <luca@...tu.xyz>
To: Dmitry Baryshkov <dmitry.baryshkov@...aro.org>,
 ~postmarketos/upstreaming@...ts.sr.ht, phone-devel@...r.kernel.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>,
 Vladimir Lypak <vladimir.lypak@...il.com>,
 Konrad Dybcio <konrad.dybcio@...aro.org>
Cc: linux-arm-msm@...r.kernel.org, devicetree@...r.kernel.org,
 linux-kernel@...r.kernel.org
Subject: Re: [PATCH RFC 1/2] arm64: dts: qcom: msm8953: Add GPU IOMMU

On Freitag, 26. Jänner 2024 00:49:55 CET Konrad Dybcio wrote:
> On 1/25/24 23:24, Dmitry Baryshkov wrote:
> > On 25/01/2024 23:56, Luca Weiss wrote:
> >> From: Vladimir Lypak <vladimir.lypak@...il.com>
> >> 
> >> Add the IOMMU used for the GPU on MSM8953.
> >> 
> >> Signed-off-by: Vladimir Lypak <vladimir.lypak@...il.com>
> >> ---
> >>   arch/arm64/boot/dts/qcom/msm8953.dtsi | 31
> >> +++++++++++++++++++++++++++++++ 1 file changed, 31 insertions(+)
> >> 
> >> diff --git a/arch/arm64/boot/dts/qcom/msm8953.dtsi
> >> b/arch/arm64/boot/dts/qcom/msm8953.dtsi index dcb5c98b793c..91d083871ab0
> >> 100644
> >> --- a/arch/arm64/boot/dts/qcom/msm8953.dtsi
> >> +++ b/arch/arm64/boot/dts/qcom/msm8953.dtsi
> >> @@ -1046,6 +1046,37 @@ mdss_dsi1_phy: phy@...6400 {
> >>               };
> >>           };
> >> +        gpu_iommu: iommu@...8000 {
> > 
> > Nit: most of the platforms use the adreno_smmu label. But maybe the
> > msm-iommu vs arm-smmu makes difference here.
> Not really :)
> 
> Please keep the labels unified

Ack, renaming to adreno_smmu

> 
> > Nevertheless:
> > 
> > Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
> > 
> >> +            compatible = "qcom,msm8953-iommu", "qcom,msm-iommu-v2";
> >> +            ranges = <0 0x01c48000 0x8000>;
> >> +
> >> +            clocks = <&gcc GCC_OXILI_AHB_CLK>,
> >> +                 <&gcc GCC_BIMC_GFX_CLK>;
> 
> And align these

They are?

Also any comment about the issues listed in the cover letter?

Regards
Luca

> 
> Konrad