X-Git-Url: http://git.ipfire.org/?a=blobdiff_plain;f=doc%2FREADME.video;h=e7ae98aa5d31c0c00e956d5591db19c305536d0b;hb=5d43feabf3707ae4e879b54450e5a3c3c664b2b9;hp=d0a3ad6e8d455f52843778a93aa7a760f66c1b65;hpb=28c4dae114c9b94b2a1111d81d4da716e9fc2cba;p=people%2Fms%2Fu-boot.git diff --git a/doc/README.video b/doc/README.video index d0a3ad6e8d..e7ae98aa5d 100644 --- a/doc/README.video +++ b/doc/README.video @@ -32,20 +32,23 @@ The driver has been tested with the following configurations: Example: video-mode=fslfb:1280x1024-32@60,monitor=dvi -U-boot sunxi video controller driver +U-Boot sunxi video controller driver ==================================== -U-boot supports hdmi and lcd output on Allwinner sunxi SoCs, lcd output +U-Boot supports hdmi and lcd output on Allwinner sunxi SoCs, lcd output requires the CONFIG_VIDEO_LCD_MODE Kconfig value to be set. -The sunxi u-boot driver supports the following video-mode options: +The sunxi U-Boot driver supports the following video-mode options: -- monitor=[none|dvi|hdmi|lcd] - Select the video output to use +- monitor=[none|dvi|hdmi|lcd|vga|composite-*] - Select the video output to use none: Disable video output. dvi/hdmi: Selects output over the hdmi connector with dvi resp. hdmi output format, if edid is used the format is automatically selected. lcd: Selects video output to a LCD screen. - vga: Selects bideo output over the VGA connector. + vga: Selects video output over the VGA connector. + composite-pal/composite-ntsc/composite-pal-m/composite-pal-nc: + Selects composite video output, note the specified resolution is + ignored with composite video output. Defaults to monitor=dvi. - hpd=[0|1] - Enable use of the hdmi HotPlug Detect feature @@ -65,6 +68,11 @@ The sunxi u-boot driver supports the following video-mode options: overrides the xres, yres and refresh from the video-mode env. variable. Defaults to edid=1. +- overscan_x/overscan_y= - Set x/y overscan value + This configures a black border on the left and right resp. top and bottom + to deal with overscanning displays. Defaults to overscan_x=32 and + overscan_y=20 for composite monitors, 0 for other monitors. + For example to always use the hdmi connector, even if no cable is inserted, using edid info when available and otherwise initalizing it at 1024x768@60Hz, use: "setenv video-mode sunxi:1024x768-24@60,monitor=dvi,hpd=0,edid=1".