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ROM-5420 User Manual
Chapter 3
S
oftware
Functionality
LVDS 1(Single) out, please set in u-boot as below:
setenv bootargs_mmc 'setenv bootargs ${bootargs} root=/dev/
mmcblk1p1 rootwait rw video=mxcfb0:dev=ldb,1920x1080M@60,if=RGB24
ldb=sin0'
LVDS 2(Split) out, please set in u-boot as below:
setenv bootargs_mmc 'setenv bootargs ${bootargs} root=/dev/
mmcblk1p1 rootwait rw video=mxcfb0:dev=ldb,1920x1080M@60,if=RGB24
ldb=sin1'
3.8.5.3
Multi Display Settings
When you want to display dual LVDS, VGA and HDMI output , please set parameter
in U-boot as follows. This is the default settings in U-boot.
setenv bootargs_mmc 'setenv bootargs ${bootargs} root=/dev/mmcblk1p1
rootwait
setenv bootargs_base 'setenv bootargs console=ttymxc0,115200
enable_wait_mode=off video_mode=extension'
For display interface clock, there are several options (Independently for each port)
listed below:
1.
Derived from the IPU internal clock (Master Mode)\
2.
Provided by an external source (Slave Mode)
3.
The transfer rate supported
When a single port is active, the pixel clock rate is up to 264 MHz
When both LVDS ports are active, you have to follow below condition:
1.
Each pixel clock rate may be up to 220 MHz**
2.
The sum of pixel clock rates is up to 240 MHz
3.8.6
Network Setup
Default: IP get form DHCP.
Manual: Set IP by below command:
#ifconfig eth0 192.168.0.1 up
ifconfig is to configure network interfaces, the manual page is as below.
SYNOPSIS
ifconfig [-v] [-a] [-s] [interface]
ifconfig [-v] interface [aftype] options | address ...
OPTIONS
-a display all interfaces which are currently available, even if
down
-s display a short list (like netstat -i)
Note!
Specified pixel clocks frequencies are applicable for internal clocks, but
may be limited by IO buffers speed capability. Final numbers are sub-
jected to AC characterization.
