update from s-media regarding landscape flicker
Andy Green
andy at openmoko.com
Tue Mar 25 14:55:01 CET 2008
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Somebody in the thread at some point said:
> Am Di 25. März 2008 schrieb Werner Almesberger:
>> Andy Green wrote:
>>> Yes, I guess the problem for this chip comes from the fact it still
>>> issues a portrait raster to the LCM, so it has to compose each portrait
>>> line from pixels that are totally disjoint in memory.
>> Just a thought: if the LCM could be configured to run in landscape
>> mode,
>
> I understand we are already doing this
No the LCM only understands video timing that is 480 pixels inside a
HSYNC line and 640 lines per VSYNC, plus blanking.
That's why rotating it in the Glamo is so attractive, the CPU can treat
it as easy 640 x 480 in memory (where the pixels in the 640 are all next
to each other in memory), the Glamo acceleration can operate on it as
640 x 480, and the LCM can continue to treat it as 480 x 640 portrait,
everybody would have been happy.
- -Andy
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