From: "Iain Sandoe" <iain@sandoe.co.uk>
To: Bastien Nocera <hadess@hadess.net>,
Paul Harrison <pfh@csse.monash.edu.au>
Cc: linuxppc-dev@lists.linuxppc.org
Subject: Re: Turning on sound in the new iBook
Date: Mon, 30 Jul 2001 00:16:22 +0100 [thread overview]
Message-ID: <20010729232006.D79A82F011@apollo.valhalla.net> (raw)
Hi Chaps,
> Just got around trying it, and it works in the sense that "cat /vmlinux
> > /dev/dsp" produces sound ;)
> The sound although contains a *lot* of noise. You're mentioning on your
> page a modification to dmasound_core, could you share it with us ?
Someone (Jack Moffitt IIRC) reported to me that the Tumbler needed to be
U16. Having looked at the Darwin code I can find no evidence of this in
Apple's stuff ... however, it might not be up-to-date.
There are a lot of assumptions in dmasound that are related to the AWACS -
especially in the bits that deal with things like the mksound().
I am working on rationalising the driver to partition out stuff that relates
to the AWACS/Screamer/Burgundy - so that the dbdma drive part of it (shared
between _core.c and _awacs.c can be used).
Ironically, it is the mksound() [SysBeep()] code that is giving me most
grief... (in thinking of a better way to do it so that it is not so
chip-dependent).
I'd like to get this done first - because it paves the way for more sensible
driver structure - and, in particular, making the SMP locking sensible.
---
IMHO the most important tumbler/DACA task is getting the keywest-i2c stuff
to be interrupt driven - it is nasty having polled code that might lock up
the kernel for seconds.
---
If the tumbler really needs to be U16 - I can modify the standard code to
make that as another 'exception'.
time is, as always, the killer here...
ciao,
Iain.
** Sent via the linuxppc-dev mail list. See http://lists.linuxppc.org/
next reply other threads:[~2001-07-29 23:16 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2001-07-29 23:16 Iain Sandoe [this message]
-- strict thread matches above, loose matches on Subject: below --
2001-07-17 18:35 Turning on sound in the new iBook Paul Harrison
2001-07-29 3:40 ` Bastien Nocera
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