Add qemu 2.4.0

[kvmfornfv.git] / qemu / roms / u-boot / doc / device-tree-bindings / video / displaymode.txt

diff --git a/qemu/roms/u-boot/doc/device-tree-bindings/video/displaymode.txt b/qemu/roms/u-boot/doc/device-tree-bindings/video/displaymode.txt
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+videomode bindings
+==================
+
+(from http://lists.freedesktop.org/archives/dri-devel/2012-July/024875.html)
+
+Required properties:
+ - xres, yres: Display resolution
+ - left-margin, right-margin, hsync-len: Horizontal Display timing
+   parameters in pixels
+ - upper-margin, lower-margin, vsync-len: Vertical display timing
+   parameters in lines
+ - clock: display clock in Hz
+
+Optional properties:
+ - width-mm, height-mm: Display dimensions in mm
+ - hsync-active-high (bool): Hsync pulse is active high
+ - vsync-active-high (bool): Vsync pulse is active high
+ - interlaced (bool): This is an interlaced mode
+ - doublescan (bool): This is a doublescan mode
+
+There are different ways of describing a display mode. The devicetree
+representation corresponds to the one used by the Linux Framebuffer
+framework described here in Documentation/fb/framebuffer.txt. This
+representation has been chosen because it's the only format which does
+not allow for inconsistent parameters. Unlike the Framebuffer framework
+the devicetree has the clock in Hz instead of ps.
+
+Example:
+
+       display@0 {
+               /* 1920x1080p24 */
+               clock = <52000000>;
+               xres = <1920>;
+               yres = <1080>;
+               left-margin = <25>;
+               right-margin = <25>;
+               hsync-len = <25>;
+               lower-margin = <2>;
+               upper-margin = <2>;
+               vsync-len = <2>;
+               hsync-active-high;
+       };