On Mon, Sep 30, 2019 at 04:24:58PM +0100, Robin Murphy wrote:
> Since we now have bindings for Mali Midgard GPUs, let's use them to
> describe Juno's GPU subsystem, if only because we can. Juno sports a
> Mali-T624 integrated behind an MMU-400 (as a gesture towards
> virtualisation), in their own dedicated power domain with DVFS
> controlled by the SCP.
>
> CC: Liviu Dudau <liviu.dudau@xxxxxxx>
Acked-by: Liviu Dudau <liviu.dudau@xxxxxxx>
Thanks,
Liviu
> CC: Sudeep Holla <sudeep.holla@xxxxxxx>
> CC: Lorenzo Pieralisi <lorenzo.pieralisi@xxxxxxx>
> Signed-off-by: Robin Murphy <robin.murphy@xxxxxxx>
> ---
> .../bindings/gpu/arm,mali-midgard.yaml | 5 +++-
> arch/arm64/boot/dts/arm/juno-base.dtsi | 27 +++++++++++++++++++
> 2 files changed, 31 insertions(+), 1 deletion(-)
>
> diff --git a/Documentation/devicetree/bindings/gpu/arm,mali-midgard.yaml b/Documentation/devicetree/bindings/gpu/arm,mali-midgard.yaml
> index 47bc1ac36426..018f3ae4b43c 100644
> --- a/Documentation/devicetree/bindings/gpu/arm,mali-midgard.yaml
> +++ b/Documentation/devicetree/bindings/gpu/arm,mali-midgard.yaml
> @@ -22,6 +22,10 @@ properties:
> - enum:
> - amlogic,meson-gxm-mali
> - const: arm,mali-t820
> + - items:
> + - enum:
> + - arm,juno-mali
> + - const: arm,mali-t624
> - items:
> - enum:
> - rockchip,rk3288-mali
> @@ -39,7 +43,6 @@ properties:
> - samsung,exynos5433-mali
> - const: arm,mali-t760
>
> - # "arm,mali-t624"
> # "arm,mali-t628"
> # "arm,mali-t830"
> # "arm,mali-t880"
> diff --git a/arch/arm64/boot/dts/arm/juno-base.dtsi b/arch/arm64/boot/dts/arm/juno-base.dtsi
> index 26a039a028b8..9e3e8ce6adfe 100644
> --- a/arch/arm64/boot/dts/arm/juno-base.dtsi
> +++ b/arch/arm64/boot/dts/arm/juno-base.dtsi
> @@ -35,6 +35,18 @@
> clock-names = "apb_pclk";
> };
>
> + smmu_gpu: iommu@2b400000 {
> + compatible = "arm,mmu-400", "arm,smmu-v1";
> + reg = <0x0 0x2b400000 0x0 0x10000>;
> + interrupts = <GIC_SPI 38 IRQ_TYPE_LEVEL_HIGH>,
> + <GIC_SPI 38 IRQ_TYPE_LEVEL_HIGH>;
> + #iommu-cells = <1>;
> + #global-interrupts = <1>;
> + power-domains = <&scpi_devpd 1>;
> + dma-coherent;
> + status = "disabled";
> + };
> +
> smmu_pcie: iommu@2b500000 {
> compatible = "arm,mmu-401", "arm,smmu-v1";
> reg = <0x0 0x2b500000 0x0 0x10000>;
> @@ -487,6 +499,21 @@
> };
> };
>
> + gpu: gpu@2d000000 {
> + compatible = "arm,juno-mali", "arm,mali-t624";
> + reg = <0 0x2d000000 0 0x10000>;
> + interrupts = <GIC_SPI 32 IRQ_TYPE_LEVEL_HIGH>,
> + <GIC_SPI 33 IRQ_TYPE_LEVEL_HIGH>,
> + <GIC_SPI 34 IRQ_TYPE_LEVEL_HIGH>;
> + interrupt-names = "gpu", "job", "mmu";
> + clocks = <&scpi_dvfs 2>;
> + power-domains = <&scpi_devpd 1>;
> + dma-coherent;
> + /* The SMMU is only really of interest to bare-metal hypervisors */
> + /* iommus = <&smmu_gpu 0>; */
> + status = "disabled";
> + };
> +
> sram: sram@2e000000 {
> compatible = "arm,juno-sram-ns", "mmio-sram";
> reg = <0x0 0x2e000000 0x0 0x8000>;
> --
> 2.21.0.dirty
>
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> https://lists.freedesktop.org/mailman/listinfo/dri-devel
--
====================
| I would like to |
| fix the world, |
| but they're not |
| giving me the |
\ source code! /
---------------
¯\_(ツ)_/¯
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