use ac97 default parameters for these ac97 based drivers.

this makes the emulation expansion factor 1 by default since there's no
emulation.  previously the factor was 2 because these drivers emulate
8-bit ulaw playback with 16-bit linear encodings.  having a factor
other than 1 by default creates block size and hiwat/lowat issues
with applications that set the block size and hiwat before other
parameters.

ok ratchov@

1 files changed, 9 insertions, 2 deletions

diff --git a/sys/dev/pci/yds.c b/sys/dev/pci/yds.c
index d43184596df..64d3885ea7a 100644
--- a/sys/dev/pci/yds.c
+++ b/sys/dev/pci/yds.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: yds.c,v 1.29 2008/04/21 00:32:43 jakemsr Exp $	*/
+/*	$OpenBSD: yds.c,v 1.30 2008/05/29 02:10:01 jakemsr Exp $	*/
 /*	$NetBSD: yds.c,v 1.5 2001/05/21 23:55:04 minoura Exp $	*/
 
 /*
@@ -158,6 +158,7 @@ void	yds_close(void *);
 int	yds_query_encoding(void *, struct audio_encoding *);
 int	yds_set_params(void *, int, int,
 	    struct audio_params *, struct audio_params *);
+void	yds_get_default_params(void *, int, struct audio_params *);
 int	yds_round_blocksize(void *, int);
 int	yds_trigger_output(void *, void *, void *, int, void (*)(void *),
 	    void *, struct audio_params *);
@@ -233,7 +234,7 @@ static struct audio_hw_if yds_hw_if = {
 	yds_get_props,
 	yds_trigger_output,
 	yds_trigger_input,
-	NULL
+	yds_get_default_params
 };
 
 struct audio_device yds_device = {
@@ -1188,6 +1189,12 @@ yds_query_encoding(addr, fp)
 	}
 }
 
+void
+yds_get_default_params(void *addr, int mode, struct audio_params *params)
+{
+	ac97_get_default_params(params);
+}
+
 int
 yds_set_params(addr, setmode, usemode, play, rec)
 	void *addr;