From: Ryan Nielsen <ran@krazynet.com>
To: Alvin Brattli <Alvin.Brattli@phys.uit.no>
Cc: linuxppc-dev@lists.linuxppc.org
Subject: Re: patch for dmasound bug
Date: Fri, 11 Jun 1999 13:07:54 -0700 [thread overview]
Message-ID: <19990611130754.A67@gondolin> (raw)
In-Reply-To: <199906102256.AAA01670@mitra.phys.uit.no>; from Alvin Brattli on Fri, Jun 11, 1999 at 12:56:26AM +0200
Alvin Brattli wrote:
> >This restores the rate/byteswap to normal after playing a beep
> >if you for example stop timidity, make a beep, resume, the sound
> >will be slower than normal (without this patch).
>
> Although this patch might do what it was intended for, it has some
> unwanted consequences on the PowerBook G3 Series, namely that one gets a
> constant, really annoying hiss from the loudspeakers, most notably
> during the boot sequence. Without this patch, the hiss stops after a
> system beep (like when you do an "echo ^G" in a shell), but now even
> this does not help. So, if this patch is included in the standard
> distribution, I suspect we will hear a lot of complaints from PowerBook
> G3 users.
is this better?
--- dmasound.c 1999/02/05 05:45:42 1.41
+++ dmasound.c 1999/06/11 20:04:43
@@ -3255,6 +3255,11 @@
save_flags(flags); cli();
if (beep_playing) {
st_le16(&beep_dbdma_cmd->command, DBDMA_STOP);
+ out_le32(&awacs_txdma->control, (RUN|PAUSE|FLUSH|WAKE) << 16);
+ out_le32(&awacs->control, MASK_IEPC
+ | (awacs_rate_index << 8) | 0x11
+ | (awacs_revision < AWACS_BURGUNDY? MASK_IEE: 0));
+ out_le32(&awacs->byteswap, sound.hard.format != AFMT_S16_BE);
beep_playing = 0;
}
restore_flags(flags);
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next prev parent reply other threads:[~1999-06-11 20:07 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
1999-06-02 20:05 patch for dmasound bug Ryan Nielsen
1999-06-10 22:56 ` Alvin Brattli
1999-06-11 20:07 ` Ryan Nielsen [this message]
1999-06-11 22:54 ` Alvin Brattli
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