[Balloon] Fw: Re: patches for pxafb

This came up in a discussion about pxa framebuffer

And it does indeed contain a nice implementation allowing bootloader
monitor config. We should clearly steal it.


----- Forwarded message from Mike Rapoport <mike.rapoport@gmail.com> -----

From: Mike Rapoport <mike.rapoport@gmail.com>
Date: Thu, 24 Sep 2009 19:48:53 +0300
To: Wookey <wookey@wookware.org>
Subject: Re: patches for pxafb
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> When you say per-machine do you mean per type of machine, or per
> device?
>
> So far as I can see the pxa framebuffer stuff assumes that
> every pxa mach type has exactly one display associated with it and
> this is built in to the the kernel. This is very tiresome on balloon3,
> which so far has had 4 different framebuffer-based displays (QVGA, VGA
> LCDs and VGA/SVGA via interface to real monitor) and two
> others (accessed over the samosa IO bus), which correspond to 'no frame
> buffer'. We currently need different kernel configs and different
> kernels to support these which seems deeply crufty, but I'm really not
> sure how to go about having displays run or boot-time configurable.
> Has anyone thought about how this should be done?

Take a look e.g. to arch/arm/mach-pxa/cm-x2xx.c.

> Sorry if this is too far off topic for the simple change mooted, but
> it seems to me to be part of the same discussion.
>
> Wookey
> --
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> http://wookware.org/
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-- 
    Sincerely Yours,
        Mike.

----- End forwarded message -----
Wookey
--
Principal hats: iEndian - Balloonboard - Toby Churchill - Emdebian
http://wookware.org/