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https://github.com/brain-hackers/u-boot-brain
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simple-framebuffer is a new device tree binding that describes a pre- configured frame-buffer memory region and its format. The Linux kernel contains a driver that supports this binding. Implement functions to create a DT node (or fill in an existing node) with parameters that describe the framebuffer format that U-Boot is using. This will be immediately used by the Raspberry Pi board in U-Boot, and likely will be used by the Samsung ARM ChromeBook support soon too. It could well be used by many other boards (e.g. Tegra boards with built-in LCD panels, which aren't yet supported by the Linux kernel). Signed-off-by: Stephen Warren <swarren@wwwdotorg.org> Acked-by: Simon Glass <sjg@chromium.org>
26 lines
806 B
Plaintext
26 lines
806 B
Plaintext
Simple Framebuffer
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A simple frame-buffer describes a raw memory region that may be rendered to,
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with the assumption that the display hardware has already been set up to scan
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out from that buffer.
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Required properties:
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- compatible: "simple-framebuffer"
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- reg: Should contain the location and size of the framebuffer memory.
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- width: The width of the framebuffer in pixels.
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- height: The height of the framebuffer in pixels.
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- stride: The number of bytes in each line of the framebuffer.
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- format: The format of the framebuffer surface. Valid values are:
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- r5g6b5 (16-bit pixels, d[15:11]=r, d[10:5]=g, d[4:0]=b).
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Example:
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framebuffer {
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compatible = "simple-framebuffer";
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reg = <0x1d385000 (1600 * 1200 * 2)>;
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width = <1600>;
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height = <1200>;
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stride = <(1600 * 2)>;
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format = "r5g6b5";
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};
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