[U-Boot] mx23-olinuxino: occasional memory errors

[Fabio Estevam]

On Thu, May 16, 2013 at 8:02 AM, Otavio Salvador
<otavio at ossystems.com.br> wrote:
> On Thu, May 16, 2013 at 1:34 AM, Tsvetan Usunov, OLIMEX Ltd
> <usunov at olimex.com> wrote:
>> Hi Kiril
>> something in uboot/kernel 3.x is broken with the memory setup
>> we also never succeed to build stabile image from 3.x
>> the only image which work rock solid is this one with kernel 2.6.x / elftosb
>> someone who is more familiar with kernel/uboot should take look at the
>> memory/clock/plls initializations in elftosb and set them in exactly same
>> manner in uboot/kernel 3.x
>> we used kernel 3.x image with Maxi on Embedded World to demonstrate how
>> imx233 interface A13-LCD4.3" and MAXI was freezing at random time after
>> playing video for 5-10 minutes on the LCD.
>> Same board works and plays video 24/7 with the old kernel image and elftosb
>
> Fabio did a big work on this and made it work for memtester >24h.
> These patches are in 2013.07 and
> https://github.com/Freescale/u-boot-imx/commits/patches-2013.04
>
> Can you test this one and check if it is stable?

Tsvetan, please try this branch and let us know how it goes. In fact
U-boot 2013.04 had issues with DDR setup and these issues were fixed
recently.

The problem with the mini variant is a different one. Does mini run
stable using old kernel and bootlets?

As the DDR layout is different we probably need to tweak
DRAM_HW_CTRL19 register for this board.

Regards,

Fabio Estevam