User`s guide

Supporting the i.MX53 Reference Board DISP0 LCD
i.MX53 System Development User’s Guide, Rev. 1
Freescale Semiconductor 18-9
The video parameter format is
<interface_id>:<ipu_out_fmt>,<xres>x<yres>[M][R][-<bpp>][@<refresh>][i][m]<name>[-<bpp>][@<re
fresh>] with variables between square brackets optional.
Table 18-7 provides sample values for an interface.
For these sample values, the video parameter is video=mxcdi0fb:RGB666,640x480M-16@55
Example 18-5. Kernel Image Stored in the SD; file system from NFS
The following commands are for a kernel image stored in the SD with a file system loaded from NFS. All
commands are executed on U-Boot:
To configure the network, use the following:
EVK U-Boot > setenv serverip 10.112.98.65
EVK U-Boot > setenv fec_addr 00:04:9f:00:ea:d3
EVK U-Boot > setenv ethaddr 00:04:9f:00:ea:d3
EVK U-Boot > setenv bootfile uImage
EVK U-Boot > saveenv
EVK U-Boot > reset
To load uImage from server, use the following:
EVK U-Boot > bootp $ {loadaddr} ernesto/53/uImage
To write uImage to SD, use the following:
EVK U-Boot > mmc write 0 ${loadaddr} 0x800 0x1800
Set NFS file system path
EVK U-Boot > setenv nfsroot /tftpboot/ernesto/ltib
To configure boot arguments to use NFS and CLAA057VA01CT LCD panel, use the following:
EVK U-Boot > setenv bootargs_mmc 'setenv bootargs ${bootargs} root=/dev/nfs ip=dhcp
video=mxcdi0fb:RGB666,640x480M-16@55 nfsroot=${serverip}:${nfsroot},v3,tcp'
Launch OS image
EVK U-Boot > run bootcmd_mmc
Table 18-7. Sample Values
Argument Name Value Definition
interface_id mxcdi0fb display interface 0 settings
interface_pix_fmt RGB666 RGB bus is 18 bits width DISP0_DAT[17:0]- RGB565
name Not used in this command —
xres 640 640 pixels (Horizontal)
yres 480 480 lines (vertical)
bpp 16 Frame buffer is 16 bits per pixel
refresh 55 55 Hz
M M Timing calculated using VESA(TM)
R Not used in this command —