VAR-SOM-MX6 HDMI
From Variscite Wiki
Choosing HDMI display is determined by passing relevant bootargs from U-BOOT to Kernel.
Add the following arguments in addition to the default ones:
'video=mxcfb0:dev=hdmi,1920x1080M@60,if=RGB24'
For example HDMI 1080P:
If your current settings is booting from SD-Card
In U-boot write :
U-Boot # 'editenv mmcargs' and copy past "video=mxcfb0:dev=hdmi,1920x1080M@60,if=RGB24" at the end.
As another example, booting from NAND boot args will look like:
U-Boot # 'editenv bootargs ' and copy past " video=mxcfb0:dev=hdmi,1920x1080M@60,if=RGB24" at the end.