dt-bindings: usb: mtk-xhci: Add binding for MediaTek xHCI host controller

[oweals/u-boot.git] / doc / README.video

diff --git a/doc/README.video b/doc/README.video
index d0a3ad6e8d455f52843778a93aa7a760f66c1b65..ced35bd2db55dcb3781dd333e909395334e51b59 100644 (file)
--- a/doc/README.video
+++ b/doc/README.video
@@ -1,8 +1,7 @@
+SPDX-License-Identifier: GPL-2.0+
 /*
  * (C) Copyright 2000
  * Paolo Scaffardi, AIRVENT SAM s.p.a - RIMINI(ITALY), arsenio@tin.it
- *
- * SPDX-License-Identifier:    GPL-2.0+
  */
 
 "video-mode" environment variable
@@ -32,20 +31,23 @@ 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 +67,31 @@ 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=<int> - 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".
+
+
+TrueType fonts
+--------------
+
+U-Boot supports the use of antialiased TrueType fonts on some platforms. This
+has been tested in x86, ARMv7 and sandbox.
+
+To enable this, select CONFIG_CONSOLE_TRUETYPE. You can choose between several
+fonts, with CONSOLE_TRUETYPE_NIMBUS being the default.
+
+TrueType support requires floating point at present. On ARMv7 platforms you
+need to disable use of the private libgcc. You can do this by disabling
+CONFIG_USE_PRIVATE_LIBGCC. See chromebook_jerry for an example. Note that this
+increases U-Boot's size by about 70KB at present.
+
+On ARM you should also make sure your toolchain supports hardfp. This is
+normally given in the name of your toolchain, e.g. arm-linux-gnueabihf (hf
+means hardware floating point). You can also run gcc with -v to see if it has
+this option.