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Configuring UBoot environment vars to output to HDMI on I.MX50 EVK

Question asked by Dave Cashin on Jan 23, 2016
Latest reply on Jan 24, 2016 by igorpadykov

Hello, when I searched the user manuals for 'hdmi', I came up with no results. The demo image would likely have this on it's UBoot, but the download link is being fixed right now. In the meantime, I am trying to display booting/linux output through HDMI using a few things that are supposed to work with other I.MX boards, and right now have tried the video parameters in all of my bootargs variables. Still nothing is shown through HDMI.

 

bootdelay=3

baudrate=115200

loadaddr=0x70800000

netdev=eth0

ethprime=FEC0

uboot=u-boot.bin

kernel=uImage

nfsroot=/opt/eldk/arm

bootcmd_net=run bootargs_base bootargs_nfs; tftpboot ${loadaddr} ${kernel}; bootm

ethact=FEC0

serverip=10.192.225.216

fec_addr=00:04:9f:00:ea:d3

ethaddr=00:04:9f:00:ea:d3

bootfile=uImage

bootcmd_mmc=run bootargs_base bootargs_mmc;mmc read 0 ${loadaddr} 0x800 0x1800;bootm

bootcmd=run bootcmd_mmc

bootargs=console=ttymxc0,115200 root=/dev/nfs ip=dhcp nfsroot=:/opt/eldk/arm,v3,tcp video=mxcfb0:dev=hdmi,1920x1080M@60,if=RGB24

bootargs_nfs=setenv bootargs console=ttymxc0,115200 root=/dev/nfs ip=dhcp nfsroot=:/opt/eldk/arm,v3,tcp video=mxcfb0:dev=hdmi,1920x1080M@60,if=RGB24 root=/dev/nfs ip=dhcp nfsroot=10.192.225.216:/opt/eldk/arm,v3,tcp

bootargs_mmc=setenv bootargs console=ttymxc0,115200 root=/dev/nfs ip=dhcp nfsroot=:/opt/eldk/arm,v3,tcp video=mxcfb0:dev=hdmi,1920x1080M@60,if=RGB24 console=tty0 root=/dev/mmcblk0p1 rootwait rw

bootargs_base=setenv bootargs console=ttymxc0,115200 video=mxcfb0:dev=hdmi,1920x1080@60,if=RGB24

stdin=serial

stdout=serial

stderr=serial

Outcomes