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Subject: Re: [PATCH 1/3] dt-bindings: Convert Arm Mali Midgard GPU to DT
 schema
To:     Rob Herring <robh@kernel.org>, devicetree@vger.kernel.org,
        dri-devel@lists.freedesktop.org
Cc:     Maxime Ripard <maxime.ripard@free-electrons.com>,
        Heiko Stuebner <heiko@sntech.de>,
        Tomeu Vizoso <tomeu.vizoso@collabora.com>,
        linux-kernel@vger.kernel.org
References: <20190820195959.6126-1-robh@kernel.org>
 <20190820195959.6126-2-robh@kernel.org>
From:   Neil Armstrong <narmstrong@baylibre.com>
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Organization: Baylibre
Message-ID: <0ab5959e-fc6c-06c3-a3f1-ea5a1ebef87d@baylibre.com>
Date:   Wed, 21 Aug 2019 09:12:50 +0200
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In-Reply-To: <20190820195959.6126-2-robh@kernel.org>
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Hi Rob,

On 20/08/2019 21:59, Rob Herring wrote:
> Convert the Arm Midgard GPU binding to DT schema format.
> 
> Signed-off-by: Rob Herring <robh@kernel.org>
> ---
>  .../bindings/gpu/arm,mali-midgard.txt         | 119 -------------
>  .../bindings/gpu/arm,mali-midgard.yaml        | 165 ++++++++++++++++++
>  2 files changed, 165 insertions(+), 119 deletions(-)
>  delete mode 100644 Documentation/devicetree/bindings/gpu/arm,mali-midgard.txt
>  create mode 100644 Documentation/devicetree/bindings/gpu/arm,mali-midgard.yaml
> 
> diff --git a/Documentation/devicetree/bindings/gpu/arm,mali-midgard.txt b/Documentation/devicetree/bindings/gpu/arm,mali-midgard.txt
> deleted file mode 100644
> index 9b298edec5b2..000000000000
> --- a/Documentation/devicetree/bindings/gpu/arm,mali-midgard.txt
> +++ /dev/null
> @@ -1,119 +0,0 @@
> -ARM Mali Midgard GPU
> -====================
> -
> -Required properties:
> -
> -- compatible :
> -  * Must contain one of the following:
> -    + "arm,mali-t604"
> -    + "arm,mali-t624"
> -    + "arm,mali-t628"
> -    + "arm,mali-t720"
> -    + "arm,mali-t760"
> -    + "arm,mali-t820"
> -    + "arm,mali-t830"
> -    + "arm,mali-t860"
> -    + "arm,mali-t880"
> -  * which must be preceded by one of the following vendor specifics:
> -    + "allwinner,sun50i-h6-mali"
> -    + "amlogic,meson-gxm-mali"
> -    + "samsung,exynos5433-mali"
> -    + "rockchip,rk3288-mali"
> -    + "rockchip,rk3399-mali"
> -
> -- reg : Physical base address of the device and length of the register area.
> -
> -- interrupts : Contains the three IRQ lines required by Mali Midgard devices.
> -
> -- interrupt-names : Contains the names of IRQ resources in the order they were
> -  provided in the interrupts property. Must contain: "job", "mmu", "gpu".
> -
> -
> -Optional properties:
> -
> -- clocks : Phandle to clock for the Mali Midgard device.
> -
> -- clock-names : Specify the names of the clocks specified in clocks
> -  when multiple clocks are present.
> -    * core: clock driving the GPU itself (When only one clock is present,
> -      assume it's this clock.)
> -    * bus: bus clock for the GPU
> -
> -- mali-supply : Phandle to regulator for the Mali device. Refer to
> -  Documentation/devicetree/bindings/regulator/regulator.txt for details.
> -
> -- operating-points-v2 : Refer to Documentation/devicetree/bindings/opp/opp.txt
> -  for details.
> -
> -- #cooling-cells: Refer to Documentation/devicetree/bindings/thermal/thermal.txt
> -  for details.
> -
> -- resets : Phandle of the GPU reset line.
> -
> -Vendor-specific bindings
> -------------------------
> -
> -The Mali GPU is integrated very differently from one SoC to
> -another. In order to accommodate those differences, you have the option
> -to specify one more vendor-specific compatible, among:
> -
> -- "allwinner,sun50i-h6-mali"
> -  Required properties:
> -  - clocks : phandles to core and bus clocks
> -  - clock-names : must contain "core" and "bus"
> -  - resets: phandle to GPU reset line
> -
> -- "amlogic,meson-gxm-mali"
> -  Required properties:
> -  - resets : Should contain phandles of :
> -    + GPU reset line
> -    + GPU APB glue reset line
> -
> -Example for a Mali-T760:
> -
> -gpu@ffa30000 {
> -	compatible = "rockchip,rk3288-mali", "arm,mali-t760";
> -	reg = <0xffa30000 0x10000>;
> -	interrupts = <GIC_SPI 6 IRQ_TYPE_LEVEL_HIGH>,
> -		     <GIC_SPI 7 IRQ_TYPE_LEVEL_HIGH>,
> -		     <GIC_SPI 8 IRQ_TYPE_LEVEL_HIGH>;
> -	interrupt-names = "job", "mmu", "gpu";
> -	clocks = <&cru ACLK_GPU>;
> -	mali-supply = <&vdd_gpu>;
> -	operating-points-v2 = <&gpu_opp_table>;
> -	power-domains = <&power RK3288_PD_GPU>;
> -	#cooling-cells = <2>;
> -};
> -
> -gpu_opp_table: opp_table0 {
> -	compatible = "operating-points-v2";
> -
> -	opp@533000000 {
> -		opp-hz = /bits/ 64 <533000000>;
> -		opp-microvolt = <1250000>;
> -	};
> -	opp@450000000 {
> -		opp-hz = /bits/ 64 <450000000>;
> -		opp-microvolt = <1150000>;
> -	};
> -	opp@400000000 {
> -		opp-hz = /bits/ 64 <400000000>;
> -		opp-microvolt = <1125000>;
> -	};
> -	opp@350000000 {
> -		opp-hz = /bits/ 64 <350000000>;
> -		opp-microvolt = <1075000>;
> -	};
> -	opp@266000000 {
> -		opp-hz = /bits/ 64 <266000000>;
> -		opp-microvolt = <1025000>;
> -	};
> -	opp@160000000 {
> -		opp-hz = /bits/ 64 <160000000>;
> -		opp-microvolt = <925000>;
> -	};
> -	opp@100000000 {
> -		opp-hz = /bits/ 64 <100000000>;
> -		opp-microvolt = <912500>;
> -	};
> -};
> diff --git a/Documentation/devicetree/bindings/gpu/arm,mali-midgard.yaml b/Documentation/devicetree/bindings/gpu/arm,mali-midgard.yaml
> new file mode 100644
> index 000000000000..24c4af74fb8d
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/gpu/arm,mali-midgard.yaml
> @@ -0,0 +1,165 @@
> +# SPDX-License-Identifier: GPL-2.0-only
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/gpu/arm,mali-midgard.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: ARM Mali Midgard GPU
> +
> +maintainers:
> +  - Rob Herring <robh@kernel.org>
> +
> +properties:
> +  $nodename:
> +    pattern: '^gpu@[a-f0-9]+$'
> +  compatible:
> +    oneOf:
> +      - items:
> +          - enum:
> +             - allwinner,sun50i-h6-mali
> +          - const: arm,mali-t720
> +      - items:
> +          - enum:
> +             - amlogic,meson-gxm-mali
> +          - const: arm,mali-t820
> +      - items:
> +          - enum:
> +             - rockchip,rk3288-mali
> +          - const: arm,mali-t760
> +      - items:
> +          - enum:
> +             - rockchip,rk3399-mali
> +          - const: arm,mali-t860
> +      - items:
> +          - enum:
> +             - samsung,exynos5433-mali
> +          - const: arm,mali-t760
> +
> +          # "arm,mali-t604"
> +          # "arm,mali-t624"
> +          # "arm,mali-t628"
> +          # "arm,mali-t830"
> +          # "arm,mali-t880"
> +
> +  reg:
> +    maxItems: 1
> +
> +  interrupts:
> +    items:
> +      - description: Job interrupt
> +      - description: MMU interrupt
> +      - description: GPU interrupt
> +
> +  interrupt-names:
> +    items:
> +      - const: job
> +      - const: mmu
> +      - const: gpu
> +
> +  clocks:
> +    minItems: 1
> +    maxItems: 2
> +
> +  clock-names:
> +    minItems: 1
> +    items:
> +      - const: core
> +      - const: bus
> +
> +  mali-supply:
> +    maxItems: 1
> +
> +  resets:
> +    minItems: 1
> +    maxItems: 2
> +
> +  operating-points-v2: true
> +
> +  "#cooling-cells":
> +    const: 2
> +
> +required:
> +  - compatible
> +  - reg
> +  - interrupts
> +  - interrupt-names
> +
> +allOf:
> +  - if:
> +      properties:
> +        compatible:
> +          contains:
> +            const: allwinner,sun50i-h6-mali
> +    then:
> +      properties:
> +        clocks:
> +          minItems: 2
> +      required:
> +        - clocks
> +        - clock-names
> +        - resets
> +  - if:
> +      properties:
> +        compatible:
> +          contains:
> +            const: amlogic,meson-gxm-mali
> +    then:
> +      properties:
> +        resets:
> +          minItems: 2
> +      required:
> +        - resets

The original bindings was wrong, In fact, clocks should be required here aswell.
Same for bifrost and utgard...

Should I send a fixup patch ?

> +
> +examples:
> +  - |
> +    #include <dt-bindings/interrupt-controller/irq.h>
> +    #include <dt-bindings/interrupt-controller/arm-gic.h>
> +
> +    gpu@ffa30000 {
> +      compatible = "rockchip,rk3288-mali", "arm,mali-t760";
> +      reg = <0xffa30000 0x10000>;
> +      interrupts = <GIC_SPI 6 IRQ_TYPE_LEVEL_HIGH>,
> +             <GIC_SPI 7 IRQ_TYPE_LEVEL_HIGH>,
> +             <GIC_SPI 8 IRQ_TYPE_LEVEL_HIGH>;
> +      interrupt-names = "job", "mmu", "gpu";
> +      clocks = <&cru 0>;
> +      mali-supply = <&vdd_gpu>;
> +      operating-points-v2 = <&gpu_opp_table>;
> +      power-domains = <&power 0>;
> +      #cooling-cells = <2>;
> +    };
> +
> +    gpu_opp_table: opp_table0 {
> +      compatible = "operating-points-v2";
> +
> +      opp@533000000 {
> +        opp-hz = /bits/ 64 <533000000>;
> +        opp-microvolt = <1250000>;
> +      };
> +      opp@450000000 {
> +        opp-hz = /bits/ 64 <450000000>;
> +        opp-microvolt = <1150000>;
> +      };
> +      opp@400000000 {
> +        opp-hz = /bits/ 64 <400000000>;
> +        opp-microvolt = <1125000>;
> +      };
> +      opp@350000000 {
> +        opp-hz = /bits/ 64 <350000000>;
> +        opp-microvolt = <1075000>;
> +      };
> +      opp@266000000 {
> +        opp-hz = /bits/ 64 <266000000>;
> +        opp-microvolt = <1025000>;
> +      };
> +      opp@160000000 {
> +        opp-hz = /bits/ 64 <160000000>;
> +        opp-microvolt = <925000>;
> +      };
> +      opp@100000000 {
> +        opp-hz = /bits/ 64 <100000000>;
> +        opp-microvolt = <912500>;
> +      };
> +    };
> +
> +...
> 
Neil