[linux-dvb] Are problems with 8bpp/16bpp driver, board, or chip limitations?

[Chris Worley <cworley@liberate.com>]

Klaus Schmidinger wrote:

> Chris Worley wrote:
>> Klaus Schmidinger wrote:

>>>

>>> You can have 1, 2, 4 or 8 bpp. However, since OSD memory is very limited,
>>> using more than 4bpp leaves you with only a very small usable OSD area.
>>> 
>> Where can I learn more about OSD memory (and what I need to handle
>> 8bpp graphics correctly)?
> 
> I guess all you need to do is make your OSD window smaller.
> With 8bpp you need twice the amount of memory, and if you request
> an OSD window that is too large (so the OSD runs out of memory)
> it just does nothing. Start with a small window (say, 100x100 pixel)
> and gradually increase the size until it isn't displayed any more.
> That's the only way I know of to find out how big the OSD window can get.

Is the lack of memory a problem with the SAA7146 chip or the board 
manufacturer's lack of memory on the board?  If the latter, is there 
anyone putting more memory on the board?

Is the lack of 16bpp support a driver issue or is 8bpp the best 
supported by the SAA7146?

Thanks,

Chris



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