Etnaviv follows the same priciple as imx-drm to have a virtual master device node to bind all the individual GPU cores together into one DRM device.
Signed-off-by: Lucas Stach l.stach@pengutronix.de --- .../bindings/drm/etnaviv/etnaviv-drm.txt | 44 ++++++++++++++++++++++ 1 file changed, 44 insertions(+) create mode 100644 Documentation/devicetree/bindings/drm/etnaviv/etnaviv-drm.txt
diff --git a/Documentation/devicetree/bindings/drm/etnaviv/etnaviv-drm.txt b/Documentation/devicetree/bindings/drm/etnaviv/etnaviv-drm.txt new file mode 100644 index 000000000000..e27082bdba0d --- /dev/null +++ b/Documentation/devicetree/bindings/drm/etnaviv/etnaviv-drm.txt @@ -0,0 +1,44 @@ +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 "fsl,imx-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" +- 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) + +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"; +};