[U-Boot] Disabling video in bootm (cleanup_before_linux)

Eric Nelson
2012-09-21T16:38:23Z

Hi all,

While looking into some trouble booting the latest Linux kernel patches
for i.MX6 display support, I found that the kernel driver was thrown off by
the interrupt status bits in the i.MX6 IPU.

Until and unless we have the ability to hand off a 'live' display, it seems
that we should disable the video driver as a part of the 'bootm' process.

At the very least, doing this will avoid the possibility of trash on the
display during the transition.

I've been looking, and I don't see a place to tap into this process.
It seems that having a shutdown routine for the display drivers
(cfb_console?) is the way to go.

Anybody know if I'm overlooking something?

Please advise,

Eric