| 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; |
| }; |
