[maemo-developers] N800 & Video playback

From: Daniel Stone daniel.stone at nokia.com
Date: Tue Mar 20 11:58:19 EET 2007
On Tue, Mar 20, 2007 at 09:31:00AM +0100, ext Klaus Rotter wrote:
> Daniel Stone wrote:
> >On Sun, Mar 18, 2007 at 07:57:36PM +0200, ext Siarhei Siamashka wrote:
> >>Looks like graphics bus on N800 is 3x slower than on Nokia 770. It might 
> >>be caused by inefficient framebuffer driver implementation in its initial
> >>revision. But if it is a hardware issue, getting normal video playback at
> >>native framerate may be troublesome. [...]
> >Unfortunately, it's a hardware issue.  What we can do is get the LCD
> The memory bandwidth to the N800 LCD framebuffer is 3 times slower that 
> the bandwidth in the N770? Is it really _that_ big?

Siarhei's calculations were correct, so, yes.

> What is limiting the bandwidth: The OMAP interface, the LCD controller 
> itself or was it a design issue.

a) and c).  It's just not stable at higher frequencies.

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