1 videomode bindings 2 ================== 3 4 (from http://lists.freedesktop.org/archives/dri-devel/2012-July/024875.html) 5 6 Required properties: 7 - xres, yres: Display resolution 8 - left-margin, right-margin, hsync-len: Horizontal Display timing 9 parameters in pixels 10 - upper-margin, lower-margin, vsync-len: Vertical display timing 11 parameters in lines 12 - clock: display clock in Hz 13 14 Optional properties: 15 - width-mm, height-mm: Display dimensions in mm 16 - hsync-active-high (bool): Hsync pulse is active high 17 - vsync-active-high (bool): Vsync pulse is active high 18 - interlaced (bool): This is an interlaced mode 19 - doublescan (bool): This is a doublescan mode 20 21 There are different ways of describing a display mode. The devicetree 22 representation corresponds to the one used by the Linux Framebuffer 23 framework described here in Documentation/fb/framebuffer.txt. This 24 representation has been chosen because it's the only format which does 25 not allow for inconsistent parameters. Unlike the Framebuffer framework 26 the devicetree has the clock in Hz instead of ps. 27 28 Example: 29 30 display@0 { 31 /* 1920x1080p24 */ 32 clock = <52000000>; 33 xres = <1920>; 34 yres = <1080>; 35 left-margin = <25>; 36 right-margin = <25>; 37 hsync-len = <25>; 38 lower-margin = <2>; 39 upper-margin = <2>; 40 vsync-len = <2>; 41 hsync-active-high; 42 }; 43
