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author | Stephen Warren <swarren@wwwdotorg.org> | 2013-05-27 22:31:17 +0400 |
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committer | Anatolij Gustschin <agust@denx.de> | 2013-06-06 00:40:03 +0400 |
commit | 6a195d2d8a9c321817e1f034afcdc8c8642664bc (patch) | |
tree | 637cc6ddf38c66fc5d678c771fabb46f27750e3e /doc/device-tree-bindings/video | |
parent | db0d47dd433bc7ba60b927fb0ff6835758a8893d (diff) | |
download | u-boot-6a195d2d8a9c321817e1f034afcdc8c8642664bc.tar.xz |
lcd: add functions to set up simplefb device tree
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>
Diffstat (limited to 'doc/device-tree-bindings/video')
-rw-r--r-- | doc/device-tree-bindings/video/simple-framebuffer.txt | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/doc/device-tree-bindings/video/simple-framebuffer.txt b/doc/device-tree-bindings/video/simple-framebuffer.txt new file mode 100644 index 0000000000..3ea4605831 --- /dev/null +++ b/doc/device-tree-bindings/video/simple-framebuffer.txt @@ -0,0 +1,25 @@ +Simple Framebuffer + +A simple frame-buffer describes a raw memory region that may be rendered to, +with the assumption that the display hardware has already been set up to scan +out from that buffer. + +Required properties: +- compatible: "simple-framebuffer" +- reg: Should contain the location and size of the framebuffer memory. +- width: The width of the framebuffer in pixels. +- height: The height of the framebuffer in pixels. +- stride: The number of bytes in each line of the framebuffer. +- format: The format of the framebuffer surface. Valid values are: + - r5g6b5 (16-bit pixels, d[15:11]=r, d[10:5]=g, d[4:0]=b). + +Example: + + framebuffer { + compatible = "simple-framebuffer"; + reg = <0x1d385000 (1600 * 1200 * 2)>; + width = <1600>; + height = <1200>; + stride = <(1600 * 2)>; + format = "r5g6b5"; + }; |