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Message-ID: <CAL_JsqL=qCVfbKnNK6q_au2PXKcOpZ6584gungRgz7T0oXNFdg@mail.gmail.com>
Date: Wed, 21 Aug 2019 08:28:07 -0500
From: Rob Herring <robh@...nel.org>
To: Neil Armstrong <narmstrong@...libre.com>
Cc: devicetree@...r.kernel.org,
dri-devel <dri-devel@...ts.freedesktop.org>,
Maxime Ripard <maxime.ripard@...e-electrons.com>,
Heiko Stuebner <heiko@...ech.de>,
Tomeu Vizoso <tomeu.vizoso@...labora.com>,
"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 1/3] dt-bindings: Convert Arm Mali Midgard GPU to DT schema
On Wed, Aug 21, 2019 at 2:12 AM Neil Armstrong <narmstrong@...libre.com> wrote:
>
> 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@...nel.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@...30000 {
> > - 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@...000000 {
> > - opp-hz = /bits/ 64 <533000000>;
> > - opp-microvolt = <1250000>;
> > - };
> > - opp@...000000 {
> > - opp-hz = /bits/ 64 <450000000>;
> > - opp-microvolt = <1150000>;
> > - };
> > - opp@...000000 {
> > - opp-hz = /bits/ 64 <400000000>;
> > - opp-microvolt = <1125000>;
> > - };
> > - opp@...000000 {
> > - opp-hz = /bits/ 64 <350000000>;
> > - opp-microvolt = <1075000>;
> > - };
> > - opp@...000000 {
> > - opp-hz = /bits/ 64 <266000000>;
> > - opp-microvolt = <1025000>;
> > - };
> > - opp@...000000 {
> > - opp-hz = /bits/ 64 <160000000>;
> > - opp-microvolt = <925000>;
> > - };
> > - opp@...000000 {
> > - 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@...nel.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 ?
I think we should just make clocks required. I can't imagine anyone
not using the clock binding.
Rob
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