mmc: omap_hsmmc: enable 8bit interface for eMMC for AM43xx

[karo-tx-uboot.git] / doc / README.video

diff --git a/doc/README.video b/doc/README.video
index f09d5f9f6bfe138632c0ea009bca406efc955245..4f7a4b5db54b4ade757d09f252ca272cfe4ffb24 100644 (file)
--- a/doc/README.video
+++ b/doc/README.video
@@ -5,17 +5,8 @@
  * SPDX-License-Identifier:    GPL-2.0+
  */
 
-U-Boot MPC8xx video controller driver
-======================================
-
-The driver has been tested with the following configurations:
-
-- MPC823FADS with AD7176 on a PAL TV (YCbYCr)  - arsenio@tin.it
-- GENIETV    with AD7177 on a PAL TV (YCbYCr)  - arsenio@tin.it
-
-
 "video-mode" environment variable
-===============================
+=================================
 
 The 'video-mode' environment variable can be used to enable and configure
 some video drivers.  The format matches the video= command-line option used
@@ -30,4 +21,53 @@ for Linux:
        <freq>          The frequency (in Hz) to use.
        <options>       A comma-separated list of device-specific options
 
+
+U-Boot MPC8xx video controller driver
+=====================================
+
+The driver has been tested with the following configurations:
+
+- MPC823FADS with AD7176 on a PAL TV (YCbYCr)  - arsenio@tin.it
+
 Example: video-mode=fslfb:1280x1024-32@60,monitor=dvi
+
+
+U-boot sunxi video controller driver
+====================================
+
+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:
+
+- 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 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
+ 0: Disabled. Configure dvi/hdmi output even if no cable is detected
+ 1: Enabled.  Fallback to the lcd / vga / none in that order (if available)
+ Defaults to hpd=1.
+
+- hpd_delay=<int> - How long to wait for the hdmi HPD signal in milliseconds
+ When the monitor and the board power up at the same time, it may take some
+ time for the monitor to assert the HPD signal. This configures how long to
+ wait for the HPD signal before assuming no cable is connected.
+ Defaults to hpd_delay=500.
+
+- edid=[0|1] - Enable use of DDC + EDID to get monitor info
+ 0: Disabled.
+ 1: Enabled. If valid EDID info was read from the monitor the EDID info will
+    overrides the xres, yres and refresh from the video-mode env. variable.
+ Defaults to edid=1.
+
+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".