Thanks Robert. This make perfect sense now. Sorry for the dumb question :-[
Regards,
Dave.
On 12/06/2013 12:19 PM, Robert Nelson wrote:
I'm not sure on your confusion. With Angstrom the bootloader/uEnv.txt
matched each other and since they programmed them at the factory they
had a 100% guarantee of what was installed. In my case, I have to
deal with the original factory u-boot/MLO, and i also support a good
dozen more boards. So for my sanity the uEnv.txt has a lot of generic
options that override some of the factory defaults for this board.
So if you compare with a board that has no factory (NAND/eMMC) like
the orignal bone, the uEnv.txt is a lot simpler:
http://eewiki.net/display/linuxonarm/BeagleBone#BeagleBone-uEnv.txtbasedbootscript
So back to the line:
loadfdt=load mmc ${mmcdev}:${mmcpart} 0x815f0000 /dtbs/${fdtfile}
For the bone (this image will boot on board boards):
ftdfile: (set by u-boot.img)
am335x-boneblack.dtb
am335x-bone.dtb
you can also override this with "fdtfile=am335x-mycape.dtb" (all
dtb's are in a single directory in the fat partition)
mmcdev:
0: microSD
1: eMMC
mmcpart:
1: (fat partition..) (i don't use 2, ext4)
In your case, follow William's example and add:
optargs=capemgr.disable_partno=BB-BONELT-HDMI,BB-BONELT-HDMIN
To the top of the uEnv.txt..
Regards,
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