[maemo-developers] [maemo-developers] Nokia's Linux-powered N800 Internet Tablet sneaks out early

[From: Siarhei Siamashka]

On Monday 08 January 2007 09:02, Komal Shah wrote:

> Ok. Let's fun begin.
>
> It looks like OMAP2420 only. As per the development track on
> linux.omap.com kernel mailing list the product may _NOT_ be using the
> IVA1.0 processor. Basically OMAP2420 from the multimedia point of view
> is a MPEG4 device. I hope you know that Nokia N93 also uses the
> OMAP2420 processor doing cool mpeg4 encode at VGA 30fps, but that's on
> IVA1.0 not on ARM. So, if N800 is not using IVA, then don't expect
> good multimedia experience like N93.
>
> BTW, I am slowly and steadily working on the IVA driver components,
> but we don't see whole lot of drivers on that right now.

Also the following line from dmesg log caugth my eye on #maemo irc channel:
[8044.496856] omapfb omapfb: s1d1374x: setting update mode to disabled

Does N800 also use Epson video chip just like N770? Could it be be some
upgraded version? Something like S1D13745 chip with hardware scaling support:
http://www.erd.epson.com/index.php?option=com_docman&task=cat_view&gid=38&Itemid=40

OMAP2420 is supposed to have 2D/3D accelerator on chip. Is it disabled and
can't be used at all (using Epson chip instead for better compatibility with
existing software developed for N770)?

Also I wonder about DSP clock frequency for both N770 and N800. ARM core is
clocked at 250MHz in N770 and 330MHZ in N800. TI docs specify 220MHz ARM core
and 220MHz DSP core in OMAP1710, while OMAP2420 is specified to have 330MHz
for ARM core and 220MHz for DSP. Was Nokia 770 clocked at 250/250 or 250/220?
Is the clock frequency for N800 equal to standard 330/220?

As ARM core is supposed to have higher clock frequency than DSP and it
contains additional useful SIMD instructions, is it a better choice than DSP
for multimedia now (pretending that IVA does not exist)?