55 lines
1.6 KiB
Plaintext
55 lines
1.6 KiB
Plaintext
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Etnaviv DRM master device
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=========================
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The Etnaviv DRM master device is a virtual device needed to list all
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Vivante GPU cores that comprise the GPU subsystem.
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Required properties:
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- compatible: Should be one of
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"fsl,imx-gpu-subsystem"
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"marvell,dove-gpu-subsystem"
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- cores: Should contain a list of phandles pointing to Vivante GPU devices
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example:
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gpu-subsystem {
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compatible = "fsl,imx-gpu-subsystem";
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cores = <&gpu_2d>, <&gpu_3d>;
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};
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Vivante GPU core devices
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========================
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Required properties:
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- compatible: Should be "vivante,gc"
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A more specific compatible is not needed, as the cores contain chip
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identification registers at fixed locations, which provide all the
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necessary information to the driver.
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- reg: should be register base and length as documented in the
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datasheet
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- interrupts: Should contain the cores interrupt line
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- clocks: should contain one clock for entry in clock-names
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see Documentation/devicetree/bindings/clock/clock-bindings.txt
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- clock-names:
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- "bus": AXI/register clock
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- "core": GPU core clock
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- "shader": Shader clock (only required if GPU has feature PIPE_3D)
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Optional properties:
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- power-domains: a power domain consumer specifier according to
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Documentation/devicetree/bindings/power/power_domain.txt
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example:
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gpu_3d: gpu@00130000 {
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compatible = "vivante,gc";
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reg = <0x00130000 0x4000>;
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interrupts = <0 9 IRQ_TYPE_LEVEL_HIGH>;
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clocks = <&clks IMX6QDL_CLK_GPU3D_AXI>,
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<&clks IMX6QDL_CLK_GPU3D_CORE>,
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<&clks IMX6QDL_CLK_GPU3D_SHADER>;
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clock-names = "bus", "core", "shader";
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power-domains = <&gpc 1>;
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};
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