We're using an am57xx general purpose evm board (AKA beagle board x15 revc) with ti-processor-sdk-linux-am57xx-evm-06.03.00.106 (which is using u-boot-2019.01+gitAUTOINC+333c3e72d3-g333c3e72d3), and we want to show a splash screen as early as possible during the boot cycle. Right now we're having trouble getting u-boot to output anything to the connected HDMI display. At the moment, we only see the display initialize late into the kernel boot.
We've modified the defconfig file for the board (in this case am57xx_evm_defconfig) to include CONFIG_DM_VIDEO, and updated it to use the `am57xx-beagle-x15-revc` device tree file.
I've found threads elsewhere describing the correct initialization for i.MX 6 boards:
setenv mmcargs 'setenv bootargs ${bootargs} root=/dev/mmcblk0p2 rootwait rw video=mxcfb0:dev=hdmi,${WIDTH}x${HEIGHT}M@60,if=RGB24'
Assuming the block device and other values are correct for my board, is there a proper video setting akin to the above to get u-boot to output to the HDMI? Or will I need to do additional work in the board.c file to initialize HDMI for this board?
