34 lines
990 B
Plaintext
34 lines
990 B
Plaintext
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Amlogic Canvas
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================================
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A canvas is a collection of metadata that describes a pixel buffer.
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Those metadata include: width, height, phyaddr, wrapping and block mode.
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Starting with GXBB the endianness can also be described.
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Many IPs within Amlogic SoCs rely on canvas indexes to read/write pixel data
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rather than use the phy addresses directly. For instance, this is the case for
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the video decoders and the display.
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Amlogic SoCs have 256 canvas.
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Device Tree Bindings:
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---------------------
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Video Lookup Table
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--------------------------
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Required properties:
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- compatible: has to be one of:
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- "amlogic,meson8-canvas", "amlogic,canvas" on Meson8
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- "amlogic,meson8b-canvas", "amlogic,canvas" on Meson8b
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- "amlogic,meson8m2-canvas", "amlogic,canvas" on Meson8m2
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- "amlogic,canvas" on GXBB and newer
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- reg: Base physical address and size of the canvas registers.
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Example:
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canvas: video-lut@48 {
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compatible = "amlogic,canvas";
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reg = <0x0 0x48 0x0 0x14>;
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};
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