Re: [Ipodlinux-devel] status update 17.02.03

[Chandan K. [home] <ch...@to...>]

Bernard,

> Since the initial patch I've committed two changes.  The most
> interesting one is some fix-ups to the frame buffer (LCD) driver. 
> Firstly the annoying flashes on startup are gone but even better the
> performance has increased dramatically (so much so that now with the
> intel MP3 player I'm no longer getting any play glitches!!).  The second

The LCD performance is really fast, and the performance of the intel
player is quite nice. But I see some tiny glitches occasionally. But
importantly key-presses and scrolling the screen no longer breaks the
song play which is a good news.

Couple of questions: Whats the significance of the hardcoded addresses
used as the buffer between the main CPU and the co-processor ? It is
quite small in size, and I was wondering if making this bigger might
help. I did try using a malloced buffer but the performance did not
improve. Have you considered pushing the whole mp3 decoding onto the
co-processor ? I noticed that if I load a chunk of mp3 into ram and feed
it, there are no glitches whatsoever. This can be easily done if we
offload the decoding onto the coproc.

-Chandan