device-tree bindings for rockchip 2D raster graphic acceleration controller (RGA)
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RGA is a standalone 2D raster graphic acceleration unit. It accelerates 2D
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graphics operations, such as point/line drawing, image scaling, rotation,
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BitBLT, alpha blending and image blur/sharpness.
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Required properties:
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- compatible: value should be one of the following
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"rockchip,rga2";
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"rockchip,rk312x-rga";
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- interrupts: RGA interrupt specifier.
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- clocks: phandle to RGA sclk/hclk/aclk clocks
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- clock-names: should be "aclk", "hclk" and "sclk"
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- status: the dsi host status;
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<disabled>: open the dsi host;
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<okay>:close the dsi host;
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Optional Properties:
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- dma-coherent: When import dma_buf to rga driver, dma_map_sg will always do cpu cache sync, it cause low performance.Actually we don't want to do cpu cache sync on this context,So set rga device with dma-coherent to skip cpu cache sync.
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Example:
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SoC-specific DT entry:
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rga: rga@ff680000 {
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compatible = "rockchip,rga2";
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reg = <0xff680000 0x10000>;
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interrupts = <GIC_SPI 55 IRQ_TYPE_LEVEL_HIGH>;
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clocks = <&cru ACLK_RGA>, <&cru HCLK_RGA>, <&cru SCLK_RGA_CORE>;
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clock-names = "aclk", "hclk", "sclk";
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dma-coherent;
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status = "disabled";
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};
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