Re: [Freedreno] [PATCH v7 6/6] arm6: dts: qcom: sm845: Set the compatible string for the GPU SMMU

Jordan Crouse
2020-06-04T22:02:30Z

On Thu, Jun 04, 2020 at 02:27:21PM -0700, Rob Clark wrote:
> On Thu, Jun 4, 2020 at 1:57 PM Jordan Crouse <jcrouse@codeaurora.org> wrote:
> >
> > Set the qcom,adreno-smmu compatible string for the GPU SMMU to enable
> > split pagetables.
> >
> > Signed-off-by: Jordan Crouse <jcrouse@codeaurora.org>
> > ---
> >
> > arch/arm64/boot/dts/qcom/sdm845.dtsi | 2 +-
> > 1 file changed, 1 insertion(+), 1 deletion(-)
> >
> > diff --git a/arch/arm64/boot/dts/qcom/sdm845.dtsi b/arch/arm64/boot/dts/qcom/sdm845.dtsi
> > index 8eb5a31346d2..8b15cd74e9ba 100644
> > --- a/arch/arm64/boot/dts/qcom/sdm845.dtsi
> > +++ b/arch/arm64/boot/dts/qcom/sdm845.dtsi
> > @@ -3556,7 +3556,7 @@
> > };
> >
> > adreno_smmu: iommu@5040000 {
> > - compatible = "qcom,sdm845-smmu-v2", "qcom,smmu-v2";
> > + compatible = "qcom,adreno-smmu", "qcom,smmu-v2";
>
> Should this be something like:
>
> compatible = "qcom,adreno-smmu", "qcom,sdm845-smmu-v2", "qcom,smmu-v2";
>
> so that new dtb still works with old kernel?

As far as I know qcom,sdm845-smmu-v2 never was actually used unless we were
doing the parsing trick somewhere.

Jordan

> > reg = <0 0x5040000 0 0x10000>;
> > #iommu-cells = <1>;
> > #global-interrupts = <2>;
> > --
> > 2.17.1
> >
> > _______________________________________________
> > Freedreno mailing list
> > Freedreno@lists.freedesktop.org
> > https://lists.freedesktop.org/mailman/listinfo/freedreno
> _______________________________________________
> Freedreno mailing list
> Freedreno@lists.freedesktop.org
> https://lists.freedesktop.org/mailman/listinfo/freedreno

--
The Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum,
a Linux Foundation Collaborative Project