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AM57X EVM: How to Add Multiple FrameBuffers

The default rootfs image for the AM57XXEVM has one /dev/fb0 framebuffer device. How can we enable 2 more devices, /dev/fb1 and /dev/fb2?

The wiki indicates that you can allocate vram on your u-boot bootargs for the kernel and so we tried the following:

console=ttyO2,115200n8 root=/dev/nfs nfsroot=192.168.1.22:/home/fluke/processor-sdk-linux-image-am57xx-evm/targetNFS,nolock,v3,tcp,rsize=4096,wsize=4096 rw ip=dhcp vram=16M omapfb.vram=0:8M,1:4M,2:4M

However, there is only 1 framebuffer device present after this:

root@am57xx-evm:/sys/devices/platform/omapdrm.0/graphics/fb0# ls
bits_per_pixel  cursor  mode   pan     state      uevent
blank           dev     modes  power   stride     virtual_size
console         device  name   rotate  subsystem

Is there a wiki page on how to do this? Are the DSS commands similar to the previous OMAP platforms as described below?

processors.wiki.ti.com/.../DSS2_SYSFS_Examples

Thank you,

Tom