Hi,
I've been playing a bit with a pcduino3 board (A20), I know mainline
u-boot has no R/W support on NAND for these boards and that's not what
I'm asking for :-)
I've noticed that when I use an sdcard, u-boot+spl initializes the
framebuffer and the screen goes on, whereas when I put u-boot.bin
(without spl then) on the NAND the screen stays blank. Is there some
magic done in the uboot's SPL that the defaut Allwinner's boot0/1 does
not do ? The environment variables and uboot's output are identical in
both boot processes:
U-Boot 2016.03-dirty (Jun 28 2016 - 10:59:14 +0200) Allwinner Technology
[...]
HDMI connected: Setting up a 1280x1024 hdmi console (overscan 0x0)
In: serial
Out: vga
Err: vga
[...]
The only difference is that the screen stays blank when uboot is read
from the NAND by boot1. In this configuration booting linux (zImage+dtb
read from a sdcard) afterwards does not bring the screen on either.
Any idea on what's going on ?
Thanks.
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