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