Hi Michal,
On 11 February 2015 at 10:16, Michal Suchanek hramrach@gmail.com wrote:
Hello,
I changed the SYS_START to work around the bug in the manufacturer firmware, applied snow_defconfig, built u-boot.bin, packed it into kernel uimage, signed it, copied it to a kernel partition, bumped priority of the partition, and rebooted.
Do you mean u-boot-dtb.bin? If not you won't get a device tree and it won't work.
I get black screen with backlight on.
So
- is u-boot supposed to have graphics console output?
If so where is that output? LCD/HDMI/what HDMI mode?
The only display related option in menuconfig seems to be some SPI display bridge.
Yes it should be enabled, works for me.
- is u-boot supposed to have serial console output?
If so where is that console? There is supposed to be some 'servo' connector somewhere but I did not find any information on the pinout.
Yes but you can only access it on the servo pints. From Pit/Pi this is a little easier, but for snow you will need to do some very fine soldering.
- how do I tell if u-boot is even running?
I think you are doing the right things.
Regards, Simon