iMX35 3stack framebuffer problem

[Baruch Siach]

Hi Boaz,

On Tue, Oct 11, 2011 at 08:57:15AM +0200, Boaz Ben-David wrote:
> On 10/11/11 08:54, Robert Schwebel wrote:
> 
>     On Tue, Oct 11, 2011 at 08:40:52AM +0200, Boaz Ben-David wrote:
> 
>         Yes, I didn't mention it, but I tried your suggestion. It works
>         (meaning there's no flicker) but
> 
>         the problem is that the screen is blank for about 8 seconds before I
>         have control again to init it.
> 
>         People here said they prefer flicker over 8 seconds of blank time...
> 
>     This is why we have a framebuffer / video driver framework in Barebox.
>     We do not have a driver for MX35 yet, but that could of course be
>     changed.
> 
>     On the other hand, I'm wondering why it needs 8 s until you see
>     something on the Linux side. We have an MX35 system here which runs at
>     532 MHz, and it needs about 1 s from power-on into Linux userspace, so
>     we decided to show the splash screen from there.
> 
>     rsc
> 
> The kernel size is almost 5MB (it includes an initramfs).
> 
> 8 seconds are from the time I call "bootm uImage" and until the init script in
> the initramfs kicks in.
> 
> If I can seriously shorten this time I will be glad to know, maybe there's
> something I missed.
> 
> Any input will be appreciated.

See 
http://elinux.org/images/8/89/ELCE-2010-Barebox-Booting-Linux-Fast-and-Fancy.pdf.  
This presentation (by Robert Schwebel) specifically mentions Barebox on 
i.MX35.

baruch

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