topic HDMI video doesn't work in i.MX Processors

HDMI video doesn't work

KenSnyder — Wed, 30 May 2012 16:23:58 GMT

I just received a QSB with an HDMI daughterboard. With the distributed SD Card I was able to boot into Linux perfectly, however when I run the commands:

set bootargs_base 'bootargs console=ttymxc0,115200 ${hdmi}'

saveenv

boot

the board reboots and displays the Linux penguin in the upper left and then stops indefinitely.

Any ideas what I'm doing wrong?

Thanks,

Ken Snyder

Re: HDMI video doesn't work

KenSnyder — Wed, 30 May 2012 18:36:35 GMT

I spotted a typographical error but fixing it made no difference.

set bootargs_base 'set bootargs console=ttymxc0,115200 ${hdmi}'

Any help would be very much appreciated. Thx

Re: HDMI video doesn't work

daiane_angolini — Thu, 31 May 2012 13:35:09 GMT

Can you share your bootargs, or even better, your cat /proc/cmdline

(I would like to see if your bootargs is being created the right way)

Do you get some error? Do you get the prompt?

Re: HDMI video doesn't work

KenSnyder — Thu, 31 May 2012 20:49:50 GMT

Daiane,

Thanks for the info and feedback.

I've got it working, probably more by happy accident than anything else.

PS: My /proc/cmdline is as follows:

console=ttymxc0,115200 gpu_nommu setenv bootargs console=ttymxc0,115200 video=mxcdi0fb:RGB24,1024x768M@60 hdmi di0_primary root=/dev/mmcblk0p1 rw rootwait

But as I mentioned, now it's working.

Thanks again,

Ken

Daiane Angolini said:

Can you share your bootargs, or even better, your cat /proc/cmdline
(I would like to see if your bootargs is being created the right way)
Do you get some error? Do you get the prompt?

Re: HDMI video doesn't work

daiane_angolini — Thu, 31 May 2012 20:52:39 GMT

It´s always caused by some magic bootargs....

Nice to know it´s working