From: kn <kn@openbsd.org>
Date: Wed, 26 Oct 2022 20:19:06 +0000 (+0000)
Subject: Make audio(9) get_props() optional, remove it from duplex drivers
X-Git-Url: http://artulab.com/gitweb/?a=commitdiff_plain;h=cc5bdd413dc6810be27950ffc92a3e2dad4ebdcb;p=openbsd

Make audio(9) get_props() optional, remove it from duplex drivers

The property bits of audio(9) are obsolete and ought to be removed
completely.

sys/dev/audio.c:audio_open() currently uses get_props() to bail out if
read *and* write was requested on a non-duplex driver.

Drivers that currently support playing but not recording need adjustment
before the API can be cleaned up.

Drivers that advertise themselves as full duplex, i.e. those that always
return AUDIO_PROP_FULLDUPLEX unconditionally in their get_props() currently
always succeed this check.

As this is the only property, losen audio_open()'s DIAGNOSTIC check and only
do the duplex check if the driver provides get_props().

This allows for simple removal of get_props() from full-duplex drivers
without adding any other code or without changing functionality.

This includes all audio drivers under sys/dev/pci/ (maestro(4) being the
only unfinished exception here).

Other drivers as well as the API change can then follow in smaller diffs.

This builds on amd64, arm64, i386, macppc and sparc64.
amd64 with azalia(4) still plays, records as well as plays and records
at the same time on my X230 as tested with

        $ aucat -i play.wav [-o rec.wav]

alpha and hppa tests by miod
OK ratchov miod
---

diff --git a/sys/arch/hppa/gsc/harmony.c b/sys/arch/hppa/gsc/harmony.c
index fea73b0a973..e0ee7de1a81 100644
--- a/sys/arch/hppa/gsc/harmony.c
+++ b/sys/arch/hppa/gsc/harmony.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: harmony.c,v 1.39 2022/10/19 19:14:16 kn Exp $	*/
+/*	$OpenBSD: harmony.c,v 1.40 2022/10/26 20:19:06 kn Exp $	*/
 
 /*
  * Copyright (c) 2003 Jason L. Wright (jason@thought.net)
@@ -67,7 +67,6 @@ int     harmony_query_devinfo(void *addr, mixer_devinfo_t *);
 void *  harmony_allocm(void *, int, size_t, int, int);
 void    harmony_freem(void *, void *, int);
 size_t  harmony_round_buffersize(void *, int, size_t);
-int     harmony_get_props(void *);
 int     harmony_trigger_output(void *, void *, void *, int,
     void (*intr)(void *), void *, struct audio_params *);
 int     harmony_trigger_input(void *, void *, void *, int,
@@ -87,7 +86,6 @@ const struct audio_hw_if harmony_sa_hw_if = {
 	.allocm = harmony_allocm,
 	.freem = harmony_freem,
 	.round_buffersize = harmony_round_buffersize,
-	.get_props = harmony_get_props,
 	.trigger_output = harmony_trigger_output,
 	.trigger_input = harmony_trigger_input,
 };
@@ -878,12 +876,6 @@ harmony_round_buffersize(void *vsc, int direction, size_t size)
 	return ((size + HARMONY_BUFSIZE - 1) & (size_t)(-HARMONY_BUFSIZE));
 }
 
-int
-harmony_get_props(void *vsc)
-{
-	return (AUDIO_PROP_FULLDUPLEX);
-}
-
 int
 harmony_trigger_output(void *vsc, void *start, void *end, int blksize,
     void (*intr)(void *), void *intrarg, struct audio_params *param)
diff --git a/sys/arch/macppc/dev/aoa.c b/sys/arch/macppc/dev/aoa.c
index 30e7b4a8b43..2c5728b05c0 100644
--- a/sys/arch/macppc/dev/aoa.c
+++ b/sys/arch/macppc/dev/aoa.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: aoa.c,v 1.15 2022/10/19 19:14:16 kn Exp $	*/
+/*	$OpenBSD: aoa.c,v 1.16 2022/10/26 20:19:07 kn Exp $	*/
 
 /*-
  * Copyright (c) 2005 Tsubai Masanari.  All rights reserved.
@@ -77,7 +77,6 @@ const struct audio_hw_if aoa_hw_if = {
 	.query_devinfo = i2s_query_devinfo,
 	.allocm = i2s_allocm,
 	.round_buffersize = i2s_round_buffersize,
-	.get_props = i2s_get_props,
 	.trigger_output = i2s_trigger_output,
 	.trigger_input = i2s_trigger_input,
 };
diff --git a/sys/arch/macppc/dev/awacs.c b/sys/arch/macppc/dev/awacs.c
index c6e06235354..335dc26ae89 100644
--- a/sys/arch/macppc/dev/awacs.c
+++ b/sys/arch/macppc/dev/awacs.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: awacs.c,v 1.39 2022/10/19 19:14:16 kn Exp $	*/
+/*	$OpenBSD: awacs.c,v 1.40 2022/10/26 20:19:07 kn Exp $	*/
 /*	$NetBSD: awacs.c,v 1.4 2001/02/26 21:07:51 wiz Exp $	*/
 
 /*-
@@ -108,7 +108,6 @@ int awacs_set_port(void *, mixer_ctrl_t *);
 int awacs_get_port(void *, mixer_ctrl_t *);
 int awacs_query_devinfo(void *, mixer_devinfo_t *);
 size_t awacs_round_buffersize(void *, int, size_t);
-int awacs_get_props(void *);
 void *awacs_allocm(void *, int, size_t, int, int);
 
 static inline u_int awacs_read_reg(struct awacs_softc *, int);
@@ -138,7 +137,6 @@ const struct audio_hw_if awacs_hw_if = {
 	.query_devinfo = awacs_query_devinfo,
 	.allocm = awacs_allocm,
 	.round_buffersize = awacs_round_buffersize,
-	.get_props = awacs_get_props,
 	.trigger_output = awacs_trigger_output,
 	.trigger_input = awacs_trigger_input,
 };
@@ -862,12 +860,6 @@ awacs_allocm(void *h, int dir, size_t size, int type, int flags)
 	return p->addr;
 }
 
-int
-awacs_get_props(void *h)
-{
-	return AUDIO_PROP_FULLDUPLEX;
-}
-
 int
 awacs_trigger_output(void *h, void *start, void *end, int bsize,
     void (*intr)(void *), void *arg, struct audio_params *param)
diff --git a/sys/arch/macppc/dev/daca.c b/sys/arch/macppc/dev/daca.c
index f7768432c37..394a7042c4c 100644
--- a/sys/arch/macppc/dev/daca.c
+++ b/sys/arch/macppc/dev/daca.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: daca.c,v 1.14 2022/10/19 19:14:16 kn Exp $	*/
+/*	$OpenBSD: daca.c,v 1.15 2022/10/26 20:19:07 kn Exp $	*/
 
 /*-
  * Copyright (c) 2002,2003 Tsubai Masanari.  All rights reserved.
@@ -83,7 +83,6 @@ const struct audio_hw_if daca_hw_if = {
 	.query_devinfo = i2s_query_devinfo,
 	.allocm = i2s_allocm,
 	.round_buffersize = i2s_round_buffersize,
-	.get_props = i2s_get_props,
 	.trigger_output = i2s_trigger_output,
 	.trigger_input = i2s_trigger_input,
 };
diff --git a/sys/arch/macppc/dev/i2s.c b/sys/arch/macppc/dev/i2s.c
index f8f3595ac41..a7b998296b2 100644
--- a/sys/arch/macppc/dev/i2s.c
+++ b/sys/arch/macppc/dev/i2s.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: i2s.c,v 1.36 2022/10/18 08:22:18 kn Exp $	*/
+/*	$OpenBSD: i2s.c,v 1.37 2022/10/26 20:19:07 kn Exp $	*/
 /*	$NetBSD: i2s.c,v 1.1 2003/12/27 02:19:34 grant Exp $	*/
 
 /*-
@@ -580,12 +580,6 @@ i2s_round_buffersize(void *h, int dir, size_t size)
 	return size;
 }
 
-int
-i2s_get_props(void *h)
-{
-	return AUDIO_PROP_FULLDUPLEX;
-}
-
 int
 i2s_trigger_output(void *h, void *start, void *end, int bsize,
     void (*intr)(void *), void *arg, struct audio_params *param)
diff --git a/sys/arch/macppc/dev/i2svar.h b/sys/arch/macppc/dev/i2svar.h
index efece60bed6..3b0d1ec9dfd 100644
--- a/sys/arch/macppc/dev/i2svar.h
+++ b/sys/arch/macppc/dev/i2svar.h
@@ -1,4 +1,4 @@
-/*	$OpenBSD: i2svar.h,v 1.9 2016/09/14 06:12:19 ratchov Exp $	*/
+/*	$OpenBSD: i2svar.h,v 1.10 2022/10/26 20:19:07 kn Exp $	*/
 
 /*-
  * Copyright (c) 2001,2003 Tsubai Masanari.  All rights reserved.
@@ -104,7 +104,6 @@ int i2s_set_port(void *, mixer_ctrl_t *);
 int i2s_get_port(void *, mixer_ctrl_t *);
 int i2s_query_devinfo(void *, mixer_devinfo_t *);
 size_t i2s_round_buffersize(void *, int, size_t);
-int i2s_get_props(void *);
 int i2s_trigger_output(void *, void *, void *, int, void (*)(void *),
     void *, struct audio_params *);
 int i2s_trigger_input(void *, void *, void *, int, void (*)(void *),
diff --git a/sys/arch/macppc/dev/onyx.c b/sys/arch/macppc/dev/onyx.c
index 7ed4aae82f2..2e53570e7c6 100644
--- a/sys/arch/macppc/dev/onyx.c
+++ b/sys/arch/macppc/dev/onyx.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: onyx.c,v 1.16 2022/10/19 19:14:16 kn Exp $	*/
+/*	$OpenBSD: onyx.c,v 1.17 2022/10/26 20:19:07 kn Exp $	*/
 
 /*-
  * Copyright (c) 2005 Tsubai Masanari.  All rights reserved.
@@ -92,7 +92,6 @@ const struct audio_hw_if onyx_hw_if = {
 	.query_devinfo = i2s_query_devinfo,
 	.allocm = i2s_allocm,
 	.round_buffersize = i2s_round_buffersize,
-	.get_props = i2s_get_props,
 	.trigger_output = i2s_trigger_output,
 	.trigger_input = i2s_trigger_input,
 };
diff --git a/sys/arch/macppc/dev/snapper.c b/sys/arch/macppc/dev/snapper.c
index 56f21b05da2..97b7fb0416c 100644
--- a/sys/arch/macppc/dev/snapper.c
+++ b/sys/arch/macppc/dev/snapper.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: snapper.c,v 1.43 2022/10/19 19:14:16 kn Exp $	*/
+/*	$OpenBSD: snapper.c,v 1.44 2022/10/26 20:19:07 kn Exp $	*/
 /*	$NetBSD: snapper.c,v 1.1 2003/12/27 02:19:34 grant Exp $	*/
 
 /*-
@@ -89,7 +89,6 @@ const struct audio_hw_if snapper_hw_if = {
 	.query_devinfo = i2s_query_devinfo,
 	.allocm = i2s_allocm,
 	.round_buffersize = i2s_round_buffersize,
-	.get_props = i2s_get_props,
 	.trigger_output = i2s_trigger_output,
 	.trigger_input = i2s_trigger_input,
 };
diff --git a/sys/arch/macppc/dev/tumbler.c b/sys/arch/macppc/dev/tumbler.c
index 0b89e030e14..8ffa6fd60a9 100644
--- a/sys/arch/macppc/dev/tumbler.c
+++ b/sys/arch/macppc/dev/tumbler.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: tumbler.c,v 1.13 2022/10/19 19:14:16 kn Exp $	*/
+/*	$OpenBSD: tumbler.c,v 1.14 2022/10/26 20:19:07 kn Exp $	*/
 
 /*-
  * Copyright (c) 2001,2003 Tsubai Masanari.  All rights reserved.
@@ -87,7 +87,6 @@ const struct audio_hw_if tumbler_hw_if = {
 	.query_devinfo = i2s_query_devinfo,
 	.allocm = i2s_allocm,
 	.round_buffersize = i2s_round_buffersize,
-	.get_props = i2s_get_props,
 	.trigger_output = i2s_trigger_output,
 	.trigger_input = i2s_trigger_input,
 };
diff --git a/sys/arch/sparc64/dev/ce4231.c b/sys/arch/sparc64/dev/ce4231.c
index b4425d8ebe4..09ec7486cf5 100644
--- a/sys/arch/sparc64/dev/ce4231.c
+++ b/sys/arch/sparc64/dev/ce4231.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: ce4231.c,v 1.40 2022/10/19 19:14:16 kn Exp $	*/
+/*	$OpenBSD: ce4231.c,v 1.41 2022/10/26 20:19:07 kn Exp $	*/
 
 /*
  * Copyright (c) 1999 Jason L. Wright (jason@thought.net)
@@ -144,7 +144,6 @@ int	ce4231_get_port(void *, mixer_ctrl_t *);
 int	ce4231_query_devinfo(void *addr, mixer_devinfo_t *);
 void *	ce4231_alloc(void *, int, size_t, int, int);
 void	ce4231_free(void *, void *, int);
-int	ce4231_get_props(void *);
 int	ce4231_trigger_output(void *, void *, void *, int,
     void (*intr)(void *), void *arg, struct audio_params *);
 int	ce4231_trigger_input(void *, void *, void *, int,
@@ -163,7 +162,6 @@ const struct audio_hw_if ce4231_sa_hw_if = {
 	.query_devinfo = ce4231_query_devinfo,
 	.allocm = ce4231_alloc,
 	.freem = ce4231_free,
-	.get_props = ce4231_get_props,
 	.trigger_output = ce4231_trigger_output,
 	.trigger_input = ce4231_trigger_input,
 };
@@ -1051,12 +1049,6 @@ onoff:
 	return (err);
 }
 
-int
-ce4231_get_props(void *addr)
-{
-	return (AUDIO_PROP_FULLDUPLEX);
-}
-
 /*
  * Hardware interrupt handler
  */
diff --git a/sys/dev/audio.c b/sys/dev/audio.c
index e06f51361b5..700a148c042 100644
--- a/sys/dev/audio.c
+++ b/sys/dev/audio.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: audio.c,v 1.201 2022/10/19 19:59:06 kn Exp $	*/
+/*	$OpenBSD: audio.c,v 1.202 2022/10/26 20:19:07 kn Exp $	*/
 /*
  * Copyright (c) 2015 Alexandre Ratchov <alex@caoua.org>
  *
@@ -1209,8 +1209,7 @@ audio_attach(struct device *parent, struct device *self, void *aux)
 	    ops->halt_input == 0 ||
 	    ops->set_port == 0 ||
 	    ops->get_port == 0 ||
-	    ops->query_devinfo == 0 ||
-	    ops->get_props == 0) {
+	    ops->query_devinfo == 0) {
 		printf("%s: missing method\n", DEVNAME(sc));
 		sc->ops = 0;
 		return;
@@ -1477,7 +1476,6 @@ int
 audio_open(struct audio_softc *sc, int flags)
 {
 	int error;
-	int props;
 
 	if (sc->mode)
 		return EBUSY;
@@ -1493,11 +1491,13 @@ audio_open(struct audio_softc *sc, int flags)
 		sc->mode |= AUMODE_PLAY;
 	if (flags & FREAD)
 		sc->mode |= AUMODE_RECORD;
-	props = sc->ops->get_props(sc->arg);
-	if (sc->mode == (AUMODE_PLAY | AUMODE_RECORD)) {
-		if (!(props & AUDIO_PROP_FULLDUPLEX)) {
-			error = ENOTTY;
-			goto bad;
+	if (sc->ops->get_props) {
+		int props = sc->ops->get_props(sc->arg);
+		if (sc->mode == (AUMODE_PLAY | AUMODE_RECORD)) {
+			if (!(props & AUDIO_PROP_FULLDUPLEX)) {
+				error = ENOTTY;
+				goto bad;
+			}
 		}
 	}
 
diff --git a/sys/dev/ic/am7930.c b/sys/dev/ic/am7930.c
index ad7d08b0167..7a0173ea296 100644
--- a/sys/dev/ic/am7930.c
+++ b/sys/dev/ic/am7930.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: am7930.c,v 1.7 2016/09/14 06:12:19 ratchov Exp $	*/
+/*	$OpenBSD: am7930.c,v 1.8 2022/10/26 20:19:07 kn Exp $	*/
 /*	$NetBSD: am7930.c,v 1.44 2001/11/13 13:14:34 lukem Exp $	*/
 
 /*
@@ -178,6 +178,10 @@ am7930_init(struct am7930_softc *sc, int flag)
 	}
 }
 
+/*
+ * XXX chip is full-duplex, but really attach-dependent.
+ * For now we know of no half-duplex attachments.
+ */
 int
 am7930_open(void *addr, int flags)
 {
@@ -316,16 +320,6 @@ am7930_halt_input(void *addr)
 	return 0;
 }
 
-/*
- * XXX chip is full-duplex, but really attach-dependent.
- * For now we know of no half-duplex attachments.
- */
-int
-am7930_get_props(void *addr)
-{
-	return AUDIO_PROP_FULLDUPLEX;
-}
-
 /*
  * Attach-dependent channel set/query
  */
diff --git a/sys/dev/ic/am7930var.h b/sys/dev/ic/am7930var.h
index 2b8d8d02552..d21ae4648bf 100644
--- a/sys/dev/ic/am7930var.h
+++ b/sys/dev/ic/am7930var.h
@@ -1,4 +1,4 @@
-/*	$OpenBSD: am7930var.h,v 1.5 2016/09/19 06:46:44 ratchov Exp $	*/
+/*	$OpenBSD: am7930var.h,v 1.6 2022/10/26 20:19:07 kn Exp $	*/
 /*	$NetBSD: am7930var.h,v 1.10 2005/01/15 15:19:52 kent Exp $	*/
 
 /*
@@ -112,7 +112,6 @@ int	am7930_commit_settings(void *);
 int	am7930_round_blocksize(void *, int);
 int	am7930_halt_output(void *);
 int	am7930_halt_input(void *);
-int	am7930_get_props(void *);
 int	am7930_set_port(void *, mixer_ctrl_t *);
 int	am7930_get_port(void *, mixer_ctrl_t *);
 int	am7930_query_devinfo(void *, mixer_devinfo_t *);
diff --git a/sys/dev/pci/auacer.c b/sys/dev/pci/auacer.c
index bfb41fbf3fb..17964f78aeb 100644
--- a/sys/dev/pci/auacer.c
+++ b/sys/dev/pci/auacer.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: auacer.c,v 1.27 2022/10/19 19:14:16 kn Exp $	*/
+/*	$OpenBSD: auacer.c,v 1.28 2022/10/26 20:19:07 kn Exp $	*/
 /*	$NetBSD: auacer.c,v 1.3 2004/11/10 04:20:26 kent Exp $	*/
 
 /*-
@@ -162,7 +162,6 @@ int	auacer_query_devinfo(void *, mixer_devinfo_t *);
 void	*auacer_allocm(void *, int, size_t, int, int);
 void	auacer_freem(void *, void *, int);
 size_t	auacer_round_buffersize(void *, int, size_t);
-int	auacer_get_props(void *);
 int	auacer_trigger_output(void *, void *, void *, int, void (*)(void *),
 	    void *, struct audio_params *);
 int	auacer_trigger_input(void *, void *, void *, int, void (*)(void *),
@@ -192,7 +191,6 @@ const struct audio_hw_if auacer_hw_if = {
 	.allocm = auacer_allocm,
 	.freem = auacer_freem,
 	.round_buffersize = auacer_round_buffersize,
-	.get_props = auacer_get_props,
 	.trigger_output = auacer_trigger_output,
 	.trigger_input = auacer_trigger_input,
 };
@@ -632,12 +630,6 @@ auacer_round_buffersize(void *v, int direction, size_t size)
 	return size;
 }
 
-int
-auacer_get_props(void *v)
-{
-	return (AUDIO_PROP_FULLDUPLEX);
-}
-
 static void
 auacer_add_entry(struct auacer_chan *chan)
 {
diff --git a/sys/dev/pci/auglx.c b/sys/dev/pci/auglx.c
index d37871add31..a362789acc4 100644
--- a/sys/dev/pci/auglx.c
+++ b/sys/dev/pci/auglx.c
@@ -1,4 +1,4 @@
-/*      $OpenBSD: auglx.c,v 1.22 2022/10/19 19:14:16 kn Exp $	*/
+/*      $OpenBSD: auglx.c,v 1.23 2022/10/26 20:19:08 kn Exp $	*/
 
 /*
  * Copyright (c) 2008 Marc Balmer <mbalmer@openbsd.org>
@@ -223,7 +223,6 @@ int auglx_query_devinfo(void *, mixer_devinfo_t *);
 void *auglx_allocm(void *, int, size_t, int, int);
 void auglx_freem(void *, void *, int);
 size_t auglx_round_buffersize(void *, int, size_t);
-int auglx_get_props(void *);
 int auglx_trigger_output(void *, void *, void *, int, void (*)(void *),
     void *, struct audio_params *);
 int auglx_trigger_input(void *, void *, void *, int, void (*)(void *),
@@ -247,7 +246,6 @@ const struct audio_hw_if auglx_hw_if = {
 	.allocm = auglx_allocm,
 	.freem = auglx_freem,
 	.round_buffersize = auglx_round_buffersize,
-	.get_props = auglx_get_props,
 	.trigger_output = auglx_trigger_output,
 	.trigger_input = auglx_trigger_input,
 };
@@ -617,12 +615,6 @@ auglx_round_buffersize(void *v, int direction, size_t size)
 	return size;
 }
 
-int
-auglx_get_props(void *v)
-{
-	return AUDIO_PROP_FULLDUPLEX;
-}
-
 int
 auglx_intr(void *v)
 {
diff --git a/sys/dev/pci/auich.c b/sys/dev/pci/auich.c
index 9258dffe120..78de2a46fa8 100644
--- a/sys/dev/pci/auich.c
+++ b/sys/dev/pci/auich.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: auich.c,v 1.118 2022/10/19 19:14:16 kn Exp $	*/
+/*	$OpenBSD: auich.c,v 1.119 2022/10/26 20:19:08 kn Exp $	*/
 
 /*
  * Copyright (c) 2000,2001 Michael Shalayeff
@@ -302,7 +302,6 @@ int auich_query_devinfo(void *, mixer_devinfo_t *);
 void *auich_allocm(void *, int, size_t, int, int);
 void auich_freem(void *, void *, int);
 size_t auich_round_buffersize(void *, int, size_t);
-int auich_get_props(void *);
 void auich_trigger_pipe(struct auich_softc *, int, struct auich_ring *);
 void auich_intr_pipe(struct auich_softc *, int, struct auich_ring *);
 int auich_trigger_output(void *, void *, void *, int, void (*)(void *),
@@ -328,7 +327,6 @@ const struct audio_hw_if auich_hw_if = {
 	.allocm = auich_allocm,
 	.freem = auich_freem,
 	.round_buffersize = auich_round_buffersize,
-	.get_props = auich_get_props,
 	.trigger_output = auich_trigger_output,
 	.trigger_input = auich_trigger_input,
 };
@@ -917,12 +915,6 @@ auich_round_buffersize(void *v, int direction, size_t size)
 	return size;
 }
 
-int
-auich_get_props(void *v)
-{
-	return AUDIO_PROP_FULLDUPLEX;
-}
-
 int
 auich_intr(void *v)
 {
diff --git a/sys/dev/pci/auixp.c b/sys/dev/pci/auixp.c
index 3a5e0fbd937..56306a69b21 100644
--- a/sys/dev/pci/auixp.c
+++ b/sys/dev/pci/auixp.c
@@ -1,4 +1,4 @@
-/* $OpenBSD: auixp.c,v 1.50 2022/10/19 19:14:16 kn Exp $ */
+/* $OpenBSD: auixp.c,v 1.51 2022/10/26 20:19:08 kn Exp $ */
 /* $NetBSD: auixp.c,v 1.9 2005/06/27 21:13:09 thorpej Exp $ */
 
 /*
@@ -117,7 +117,6 @@ int	auixp_get_port(void *, mixer_ctrl_t *);
 int	auixp_query_devinfo(void *, mixer_devinfo_t *);
 void *	auixp_malloc(void *, int, size_t, int, int);
 void	auixp_free(void *, void *, int);
-int	auixp_get_props(void *);
 int	auixp_intr(void *);
 int	auixp_allocmem(struct auixp_softc *, size_t, size_t,
     struct auixp_dma *);
@@ -167,7 +166,6 @@ const struct audio_hw_if auixp_hw_if = {
 	.query_devinfo = auixp_query_devinfo,
 	.allocm = auixp_malloc,
 	.freem = auixp_free,
-	.get_props = auixp_get_props,
 	.trigger_output = auixp_trigger_output,
 	.trigger_input = auixp_trigger_input,
 };
@@ -438,13 +436,6 @@ auixp_query_devinfo(void *hdl, mixer_devinfo_t *di)
 	return co->codec_if->vtbl->query_devinfo(co->codec_if, di);
 }
 
-int
-auixp_get_props(void *hdl)
-{
-
-	return AUDIO_PROP_FULLDUPLEX;
-}
-
 
 /*
  * A dma descriptor has dma->nsegs segments defined in dma->segs set up when
diff --git a/sys/dev/pci/autri.c b/sys/dev/pci/autri.c
index 5e026bd5c24..391397e714d 100644
--- a/sys/dev/pci/autri.c
+++ b/sys/dev/pci/autri.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: autri.c,v 1.49 2022/10/19 19:14:16 kn Exp $	*/
+/*	$OpenBSD: autri.c,v 1.50 2022/10/26 20:19:08 kn Exp $	*/
 
 /*
  * Copyright (c) 2001 SOMEYA Yoshihiko and KUROSAWA Takahiro.
@@ -134,7 +134,6 @@ int	autri_mixer_set_port(void *, mixer_ctrl_t *);
 int	autri_mixer_get_port(void *, mixer_ctrl_t *);
 void   *autri_malloc(void *, int, size_t, int, int);
 void	autri_free(void *, void *, int);
-int	autri_get_props(void *);
 int	autri_query_devinfo(void *addr, mixer_devinfo_t *dip);
 
 int	autri_get_portnum_by_name(struct autri_softc *, char *, char *, char *);
@@ -151,7 +150,6 @@ const struct audio_hw_if autri_hw_if = {
 	.query_devinfo = autri_query_devinfo,
 	.allocm = autri_malloc,
 	.freem = autri_free,
-	.get_props = autri_get_props,
 	.trigger_output = autri_trigger_output,
 	.trigger_input = autri_trigger_input,
 };
@@ -1023,12 +1021,6 @@ autri_find_dma(struct autri_softc *sc, void *addr)
 	return p;
 }
 
-int
-autri_get_props(void *addr)
-{
-	return (AUDIO_PROP_FULLDUPLEX);
-}
-
 void
 autri_setup_channel(struct autri_softc *sc, int mode, struct audio_params *param)
 {
diff --git a/sys/dev/pci/auvia.c b/sys/dev/pci/auvia.c
index 90339003055..40c8776f571 100644
--- a/sys/dev/pci/auvia.c
+++ b/sys/dev/pci/auvia.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: auvia.c,v 1.65 2022/10/19 19:14:16 kn Exp $ */
+/*	$OpenBSD: auvia.c,v 1.66 2022/10/26 20:19:08 kn Exp $ */
 /*	$NetBSD: auvia.c,v 1.28 2002/11/04 16:38:49 kent Exp $	*/
 
 /*-
@@ -87,7 +87,6 @@ int	auvia_query_devinfo(void *, mixer_devinfo_t *);
 void *	auvia_malloc(void *, int, size_t, int, int);
 void	auvia_free(void *, void *, int);
 size_t	auvia_round_buffersize(void *, int, size_t);
-int	auvia_get_props(void *);
 int	auvia_build_dma_ops(struct auvia_softc *, struct auvia_softc_chan *,
 	struct auvia_dma *, void *, void *, int);
 int	auvia_trigger_output(void *, void *, void *, int, void (*)(void *),
@@ -191,7 +190,6 @@ const struct audio_hw_if auvia_hw_if = {
 	.allocm = auvia_malloc,
 	.freem = auvia_free,
 	.round_buffersize = auvia_round_buffersize,
-	.get_props = auvia_get_props,
 	.trigger_output = auvia_trigger_output,
 	.trigger_input = auvia_trigger_input,
 };
@@ -791,12 +789,6 @@ auvia_round_buffersize(void *addr, int direction, size_t bufsize)
 	return bufsize;
 }
 
-int
-auvia_get_props(void *addr)
-{
-	return AUDIO_PROP_FULLDUPLEX;
-}
-
 
 int
 auvia_build_dma_ops(struct auvia_softc *sc, struct auvia_softc_chan *ch,
diff --git a/sys/dev/pci/azalia.c b/sys/dev/pci/azalia.c
index 5e73a2d9b57..0b1ab7a831b 100644
--- a/sys/dev/pci/azalia.c
+++ b/sys/dev/pci/azalia.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: azalia.c,v 1.279 2022/10/24 05:59:17 jsg Exp $	*/
+/*	$OpenBSD: azalia.c,v 1.280 2022/10/26 20:19:08 kn Exp $	*/
 /*	$NetBSD: azalia.c,v 1.20 2006/05/07 08:31:44 kent Exp $	*/
 
 /*-
@@ -264,7 +264,6 @@ int	azalia_query_devinfo(void *, mixer_devinfo_t *);
 void	*azalia_allocm(void *, int, size_t, int, int);
 void	azalia_freem(void *, void *, int);
 size_t	azalia_round_buffersize(void *, int, size_t);
-int	azalia_get_props(void *);
 int	azalia_trigger_output(void *, void *, void *, int,
 	void (*)(void *), void *, audio_params_t *);
 int	azalia_trigger_input(void *, void *, void *, int,
@@ -301,7 +300,6 @@ const struct audio_hw_if azalia_hw_if = {
 	.allocm = azalia_allocm,
 	.freem = azalia_freem,
 	.round_buffersize = azalia_round_buffersize,
-	.get_props = azalia_get_props,
 	.trigger_output = azalia_trigger_output,
 	.trigger_input = azalia_trigger_input,
 	.set_blksz = azalia_set_blksz,
@@ -4137,12 +4135,6 @@ azalia_round_buffersize(void *v, int dir, size_t size)
 	return size;
 }
 
-int
-azalia_get_props(void *v)
-{
-	return AUDIO_PROP_FULLDUPLEX;
-}
-
 int
 azalia_trigger_output(void *v, void *start, void *end, int blk,
     void (*intr)(void *), void *arg, audio_params_t *param)
diff --git a/sys/dev/pci/cmpci.c b/sys/dev/pci/cmpci.c
index ff3561ce355..1fa6bc3e259 100644
--- a/sys/dev/pci/cmpci.c
+++ b/sys/dev/pci/cmpci.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: cmpci.c,v 1.51 2022/10/19 19:14:16 kn Exp $	*/
+/*	$OpenBSD: cmpci.c,v 1.52 2022/10/26 20:19:08 kn Exp $	*/
 /*	$NetBSD: cmpci.c,v 1.25 2004/10/26 06:32:20 xtraeme Exp $	*/
 
 /*
@@ -141,7 +141,6 @@ int cmpci_query_devinfo(void *, mixer_devinfo_t *);
 void *cmpci_malloc(void *, int, size_t, int, int);
 void cmpci_free(void *, void *, int);
 size_t cmpci_round_buffersize(void *, int, size_t);
-int cmpci_get_props(void *);
 int cmpci_trigger_output(void *, void *, void *, int,
 				     void (*)(void *), void *,
 				     struct audio_params *);
@@ -162,7 +161,6 @@ const struct audio_hw_if cmpci_hw_if = {
 	.allocm = cmpci_malloc,
 	.freem = cmpci_free,
 	.round_buffersize = cmpci_round_buffersize,
-	.get_props = cmpci_get_props,
 	.trigger_output = cmpci_trigger_output,
 	.trigger_input = cmpci_trigger_input,
 };
@@ -1757,13 +1755,6 @@ cmpci_round_buffersize(void *handle, int direction, size_t bufsize)
 	return bufsize;
 }
 
-/* ARGSUSED */
-int
-cmpci_get_props(void *handle)
-{
-	return AUDIO_PROP_FULLDUPLEX;
-}
-
 int
 cmpci_trigger_output(void *handle, void *start, void *end, int blksize,
     void (*intr)(void *), void *arg, struct audio_params *param)
diff --git a/sys/dev/pci/cs4280.c b/sys/dev/pci/cs4280.c
index 1ca4e019b59..837a15f6589 100644
--- a/sys/dev/pci/cs4280.c
+++ b/sys/dev/pci/cs4280.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: cs4280.c,v 1.59 2022/10/19 19:14:16 kn Exp $	*/
+/*	$OpenBSD: cs4280.c,v 1.60 2022/10/26 20:19:08 kn Exp $	*/
 /*	$NetBSD: cs4280.c,v 1.5 2000/06/26 04:56:23 simonb Exp $	*/
 
 /*
@@ -206,7 +206,6 @@ int	cs4280_mixer_get_port(void *, mixer_ctrl_t *);
 int	cs4280_query_devinfo(void *addr, mixer_devinfo_t *dip);
 void   *cs4280_malloc(void *, int, size_t, int, int);
 void	cs4280_free(void *, void *, int);
-int	cs4280_get_props(void *);
 int	cs4280_trigger_output(void *, void *, void *, int, void (*)(void *),
 	    void *, struct audio_params *);
 int	cs4280_trigger_input(void *, void *, void *, int, void (*)(void *),
@@ -245,7 +244,6 @@ const struct audio_hw_if cs4280_hw_if = {
 	.query_devinfo = cs4280_query_devinfo,
 	.allocm = cs4280_malloc,
 	.freem = cs4280_free,
-	.get_props = cs4280_get_props,
 	.trigger_output = cs4280_trigger_output,
 	.trigger_input = cs4280_trigger_input,
 };
@@ -1051,12 +1049,6 @@ cs4280_round_blocksize(void *hdl, int blk)
 	return (blk < CS4280_ICHUNK ? CS4280_ICHUNK : blk & -CS4280_ICHUNK);
 }
 
-int
-cs4280_get_props(void *hdl)
-{
-	return (AUDIO_PROP_FULLDUPLEX);
-}
-
 int
 cs4280_mixer_get_port(void *addr, mixer_ctrl_t *cp)
 {
diff --git a/sys/dev/pci/cs4281.c b/sys/dev/pci/cs4281.c
index a92c55d46fe..93c96caa8e9 100644
--- a/sys/dev/pci/cs4281.c
+++ b/sys/dev/pci/cs4281.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: cs4281.c,v 1.44 2022/10/19 19:14:16 kn Exp $ */
+/*	$OpenBSD: cs4281.c,v 1.45 2022/10/26 20:19:08 kn Exp $ */
 /*	$Tera: cs4281.c,v 1.18 2000/12/27 14:24:45 tacha Exp $	*/
 
 /*
@@ -166,7 +166,6 @@ int cs4281_init(struct cs4281_softc *);
 int cs4281_open(void *, int);
 void cs4281_close(void *);
 int cs4281_round_blocksize(void *, int);
-int cs4281_get_props(void *);
 int cs4281_attach_codec(void *, struct ac97_codec_if *);
 int cs4281_read_codec(void *, u_int8_t , u_int16_t *);
 int cs4281_write_codec(void *, u_int8_t, u_int16_t);
@@ -207,7 +206,6 @@ const struct audio_hw_if cs4281_hw_if = {
 	.allocm = cs4281_malloc,
 	.freem = cs4281_free,
 	.round_buffersize = cs4281_round_buffersize,
-	.get_props = cs4281_get_props,
 	.trigger_output = cs4281_trigger_output,
 	.trigger_input = cs4281_trigger_input,
 };
@@ -1185,12 +1183,6 @@ cs4281_round_buffersize(void *addr, int direction, size_t size)
 	return (DMA_SIZE);
 }
 
-int
-cs4281_get_props(void *addr)
-{
-	return (AUDIO_PROP_FULLDUPLEX);
-}
-
 /* AC97 */
 int
 cs4281_attach_codec(void *addr, struct ac97_codec_if *codec_if)
diff --git a/sys/dev/pci/eap.c b/sys/dev/pci/eap.c
index f1280d09c37..dd7e2c258b5 100644
--- a/sys/dev/pci/eap.c
+++ b/sys/dev/pci/eap.c
@@ -1,4 +1,4 @@
-/*      $OpenBSD: eap.c,v 1.63 2022/10/19 19:14:16 kn Exp $ */
+/*      $OpenBSD: eap.c,v 1.64 2022/10/26 20:19:08 kn Exp $ */
 /*	$NetBSD: eap.c,v 1.46 2001/09/03 15:07:37 reinoud Exp $ */
 
 /*
@@ -176,7 +176,6 @@ int	eap1371_mixer_get_port(void *, mixer_ctrl_t *);
 int	eap1370_query_devinfo(void *, mixer_devinfo_t *);
 void   *eap_malloc(void *, int, size_t, int, int);
 void	eap_free(void *, void *, int);
-int	eap_get_props(void *);
 void	eap1370_set_mixer(struct eap_softc *sc, int a, int d);
 u_int32_t eap1371_src_wait(struct eap_softc *sc);
 void	eap1371_src_write(struct eap_softc *sc, int a, int d);
@@ -206,7 +205,6 @@ const struct audio_hw_if eap1370_hw_if = {
 	.query_devinfo = eap1370_query_devinfo,
 	.allocm = eap_malloc,
 	.freem = eap_free,
-	.get_props = eap_get_props,
 	.trigger_output = eap_trigger_output,
 	.trigger_input = eap_trigger_input,
 };
@@ -223,7 +221,6 @@ const struct audio_hw_if eap1371_hw_if = {
 	.query_devinfo = eap1371_query_devinfo,
 	.allocm = eap_malloc,
 	.freem = eap_free,
-	.get_props = eap_get_props,
 	.trigger_output = eap_trigger_output,
 	.trigger_input = eap_trigger_input,
 };
@@ -1479,12 +1476,6 @@ eap_free(void *addr, void *ptr, int pool)
 	}
 }
 
-int
-eap_get_props(void *addr)
-{
-	return (AUDIO_PROP_FULLDUPLEX);
-}
-
 enum ac97_host_flags
 eap_flags_codec(void *v)
 {
diff --git a/sys/dev/pci/emuxki.c b/sys/dev/pci/emuxki.c
index 7d32dec5e6f..e1d2d7cd2b1 100644
--- a/sys/dev/pci/emuxki.c
+++ b/sys/dev/pci/emuxki.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: emuxki.c,v 1.60 2022/10/19 19:14:16 kn Exp $	*/
+/*	$OpenBSD: emuxki.c,v 1.61 2022/10/26 20:19:08 kn Exp $	*/
 /*	$NetBSD: emuxki.c,v 1.1 2001/10/17 18:39:41 jdolecek Exp $	*/
 
 /*-
@@ -178,8 +178,6 @@ int	emuxki_query_devinfo(void *, mixer_devinfo_t *);
 void   *emuxki_allocm(void *, int, size_t, int, int);
 void	emuxki_freem(void *, void *, int);
 
-int	emuxki_get_props(void *);
-
 /* Interrupt handler */
 int  emuxki_intr(void *);
 
@@ -224,7 +222,6 @@ const struct audio_hw_if emuxki_hw_if = {
 	.allocm = emuxki_allocm,
 	.freem = emuxki_freem,
 	.round_buffersize = emuxki_round_buffersize,
-	.get_props = emuxki_get_props,
 	.trigger_output = emuxki_trigger_output,
 	.trigger_input = emuxki_trigger_input,
 };
@@ -2259,12 +2256,6 @@ emuxki_round_buffersize(void *addr, int direction, size_t bsize)
 	return (bsize);
 }
 
-int
-emuxki_get_props(void *addr)
-{
-	return (AUDIO_PROP_FULLDUPLEX);
-}
-
 int
 emuxki_trigger_output(void *addr, void *start, void *end, int blksize,
 		       void (*inth) (void *), void *inthparam,
diff --git a/sys/dev/pci/envy.c b/sys/dev/pci/envy.c
index ab95ab039bb..b230961c8e0 100644
--- a/sys/dev/pci/envy.c
+++ b/sys/dev/pci/envy.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: envy.c,v 1.86 2022/10/19 19:14:16 kn Exp $	*/
+/*	$OpenBSD: envy.c,v 1.87 2022/10/26 20:19:08 kn Exp $	*/
 /*
  * Copyright (c) 2007 Alexandre Ratchov <alex@caoua.org>
  *
@@ -111,7 +111,6 @@ int envy_halt_input(void *);
 int envy_query_devinfo(void *, struct mixer_devinfo *);
 int envy_get_port(void *, struct mixer_ctrl *);
 int envy_set_port(void *, struct mixer_ctrl *);
-int envy_get_props(void *);
 #if NMIDI > 0
 int envy_midi_open(void *, int, void (*)(void *, int),
     void (*)(void *), void *);
@@ -191,7 +190,6 @@ const struct audio_hw_if envy_hw_if = {
 	.query_devinfo = envy_query_devinfo,
 	.allocm = envy_allocm,
 	.freem = envy_freem,
-	.get_props = envy_get_props,
 	.trigger_output = envy_trigger_output,
 	.trigger_input = envy_trigger_input,
 };
@@ -2431,12 +2429,6 @@ envy_set_port(void *self, struct mixer_ctrl *ctl)
 	return ENXIO;
 }
 
-int
-envy_get_props(void *self)
-{
-	return AUDIO_PROP_FULLDUPLEX;
-}
-
 #if NMIDI > 0
 int
 envy_midi_open(void *self, int flags,
diff --git a/sys/dev/pci/esa.c b/sys/dev/pci/esa.c
index 55603e28afd..86f92bd1a17 100644
--- a/sys/dev/pci/esa.c
+++ b/sys/dev/pci/esa.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: esa.c,v 1.40 2022/10/19 19:14:16 kn Exp $	*/
+/*	$OpenBSD: esa.c,v 1.41 2022/10/26 20:19:08 kn Exp $	*/
 /* $NetBSD: esa.c,v 1.12 2002/03/24 14:17:35 jmcneill Exp $ */
 
 /*
@@ -110,7 +110,6 @@ int		esa_query_devinfo(void *, mixer_devinfo_t *);
 void *		esa_malloc(void *, int, size_t, int, int);
 void		esa_free(void *, void *, int);
 size_t		esa_round_buffersize(void *, int, size_t);
-int		esa_get_props(void *);
 int		esa_trigger_output(void *, void *, void *, int,
 				   void (*)(void *), void *,
 				   struct audio_params *);
@@ -165,7 +164,6 @@ const struct audio_hw_if esa_hw_if = {
 	.allocm = esa_malloc,
 	.freem = esa_free,
 	.round_buffersize = esa_round_buffersize,
-	.get_props = esa_get_props,
 	.trigger_output = esa_trigger_output,
 	.trigger_input = esa_trigger_input,
 };
@@ -488,12 +486,6 @@ esa_round_buffersize(void *hdl, int direction, size_t bufsize)
 	return (vc->play.bufsize);
 }
 
-int
-esa_get_props(void *hdl)
-{
-	return (AUDIO_PROP_FULLDUPLEX);
-}
-
 int
 esa_trigger_output(void *hdl, void *start, void *end, int blksize,
 			void (*intr)(void *), void *intrarg,
diff --git a/sys/dev/pci/eso.c b/sys/dev/pci/eso.c
index 87e7c8f652d..f0967505f7b 100644
--- a/sys/dev/pci/eso.c
+++ b/sys/dev/pci/eso.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: eso.c,v 1.52 2022/10/19 19:14:17 kn Exp $	*/
+/*	$OpenBSD: eso.c,v 1.53 2022/10/26 20:19:08 kn Exp $	*/
 /*	$NetBSD: eso.c,v 1.48 2006/12/18 23:13:39 kleink Exp $	*/
 
 /*
@@ -116,7 +116,6 @@ int	eso_query_devinfo(void *, mixer_devinfo_t *);
 void *	eso_allocm(void *, int, size_t, int, int);
 void	eso_freem(void *, void *, int);
 size_t	eso_round_buffersize(void *, int, size_t);
-int	eso_get_props(void *);
 int	eso_trigger_output(void *, void *, void *, int,
 		    void (*)(void *), void *, struct audio_params *);
 int	eso_trigger_input(void *, void *, void *, int,
@@ -136,7 +135,6 @@ const struct audio_hw_if eso_hw_if = {
 	.allocm = eso_allocm,
 	.freem = eso_freem,
 	.round_buffersize = eso_round_buffersize,
-	.get_props = eso_get_props,
 	.trigger_output = eso_trigger_output,
 	.trigger_input = eso_trigger_input,
 };
@@ -1560,13 +1558,6 @@ eso_round_buffersize(void *hdl, int direction, size_t bufsize)
 	return (bufsize);
 }
 
-/* ARGSUSED */
-int
-eso_get_props(void *hdl)
-{
-	return (AUDIO_PROP_FULLDUPLEX);
-}
-
 int
 eso_trigger_output(void *hdl, void *start, void *end, int blksize,
     void (*intr)(void *), void *arg, struct audio_params *param)
diff --git a/sys/dev/pci/fms.c b/sys/dev/pci/fms.c
index 9a154ea32bd..f3238126d20 100644
--- a/sys/dev/pci/fms.c
+++ b/sys/dev/pci/fms.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: fms.c,v 1.35 2022/10/19 19:14:17 kn Exp $ */
+/*	$OpenBSD: fms.c,v 1.36 2022/10/26 20:19:08 kn Exp $ */
 /*	$NetBSD: fms.c,v 1.5.4.1 2000/06/30 16:27:50 simonb Exp $	*/
 
 /*-
@@ -85,7 +85,6 @@ int	fms_get_port(void *, mixer_ctrl_t *);
 int	fms_query_devinfo(void *, mixer_devinfo_t *);
 void	*fms_malloc(void *, int, size_t, int, int);
 void	fms_free(void *, void *, int);
-int	fms_get_props(void *);
 int	fms_trigger_output(void *, void *, void *, int, void (*)(void *),
 			   void *, struct audio_params *);
 int	fms_trigger_input(void *, void *, void *, int, void (*)(void *),
@@ -111,7 +110,6 @@ const struct audio_hw_if fms_hw_if = {
 	.query_devinfo = fms_query_devinfo,
 	.allocm = fms_malloc,
 	.freem = fms_free,
-	.get_props = fms_get_props,
 	.trigger_output = fms_trigger_output,
 	.trigger_input = fms_trigger_input,
 };
@@ -624,12 +622,6 @@ fms_free(void *addr, void *ptr, int pool)
 	panic("fms_free: trying to free unallocated memory");
 }
 
-int
-fms_get_props(void *addr)
-{
-	return AUDIO_PROP_FULLDUPLEX;
-}
-
 int
 fms_query_devinfo(void *addr, mixer_devinfo_t *dip)
 {
diff --git a/sys/dev/pci/neo.c b/sys/dev/pci/neo.c
index 0057e54b3b5..d3258577fbd 100644
--- a/sys/dev/pci/neo.c
+++ b/sys/dev/pci/neo.c
@@ -1,4 +1,4 @@
-/*      $OpenBSD: neo.c,v 1.39 2022/10/19 19:14:17 kn Exp $       */
+/*      $OpenBSD: neo.c,v 1.40 2022/10/26 20:19:08 kn Exp $       */
 
 /*
  * Copyright (c) 1999 Cameron Grant <gandalf@vilnya.demon.co.uk>
@@ -199,7 +199,6 @@ int	neo_query_devinfo(void *, mixer_devinfo_t *);
 void   *neo_malloc(void *, int, size_t, int, int);
 void	neo_free(void *, void *, int);
 size_t	neo_round_buffersize(void *, int, size_t);
-int	neo_get_props(void *);
 void	neo_set_mixer(struct neo_softc *sc, int a, int d);
 
 struct cfdriver neo_cd = {
@@ -250,7 +249,6 @@ const struct audio_hw_if neo_hw_if = {
 	.allocm = neo_malloc,
 	.freem = neo_free,
 	.round_buffersize = neo_round_buffersize,
-	.get_props = neo_get_props,
 	.trigger_output = neo_trigger_output,
 	.trigger_input = neo_trigger_input,
 
@@ -925,10 +923,3 @@ neo_round_buffersize(void *addr, int direction, size_t size)
 {
 	return (NM_BUFFSIZE);
 }
-
-
-int
-neo_get_props(void *addr)
-{
-	return (AUDIO_PROP_FULLDUPLEX);
-}
diff --git a/sys/dev/pci/sv.c b/sys/dev/pci/sv.c
index 1d019e616ee..841738c45be 100644
--- a/sys/dev/pci/sv.c
+++ b/sys/dev/pci/sv.c
@@ -1,4 +1,4 @@
-/*      $OpenBSD: sv.c,v 1.42 2022/10/19 19:14:17 kn Exp $ */
+/*      $OpenBSD: sv.c,v 1.43 2022/10/26 20:19:08 kn Exp $ */
 
 /*
  * Copyright (c) 1998 Constantine Paul Sapuntzakis
@@ -142,7 +142,6 @@ int	sv_mixer_get_port(void *, mixer_ctrl_t *);
 int	sv_query_devinfo(void *, mixer_devinfo_t *);
 void   *sv_malloc(void *, int, size_t, int, int);
 void	sv_free(void *, void *, int);
-int	sv_get_props(void *);
 
 void    sv_dumpregs(struct sv_softc *sc);
 
@@ -162,7 +161,6 @@ const struct audio_hw_if sv_hw_if = {
 	.query_devinfo = sv_query_devinfo,
 	.allocm = sv_malloc,
 	.freem = sv_free,
-	.get_props = sv_get_props,
 };
 
 
@@ -1301,9 +1299,3 @@ sv_free(void *addr, void *ptr, int pool)
                 }
         }
 }
-
-int
-sv_get_props(void *addr)
-{
-	return (AUDIO_PROP_FULLDUPLEX);
-}
diff --git a/sys/dev/pci/yds.c b/sys/dev/pci/yds.c
index 3cf060f58bb..666f3b465ef 100644
--- a/sys/dev/pci/yds.c
+++ b/sys/dev/pci/yds.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: yds.c,v 1.62 2022/10/19 19:14:17 kn Exp $	*/
+/*	$OpenBSD: yds.c,v 1.63 2022/10/26 20:19:08 kn Exp $	*/
 /*	$NetBSD: yds.c,v 1.5 2001/05/21 23:55:04 minoura Exp $	*/
 
 /*
@@ -166,7 +166,6 @@ int	yds_mixer_get_port(void *, mixer_ctrl_t *);
 void   *yds_malloc(void *, int, size_t, int, int);
 void	yds_free(void *, void *, int);
 size_t	yds_round_buffersize(void *, int, size_t);
-int	yds_get_props(void *);
 int	yds_query_devinfo(void *addr, mixer_devinfo_t *dip);
 
 int     yds_attach_codec(void *sc, struct ac97_codec_if *);
@@ -212,7 +211,6 @@ static const struct audio_hw_if yds_hw_if = {
 	.allocm = yds_malloc,
 	.freem = yds_free,
 	.round_buffersize = yds_round_buffersize,
-	.get_props = yds_get_props,
 	.trigger_output = yds_trigger_output,
 	.trigger_input = yds_trigger_input,
 };
@@ -1560,12 +1558,6 @@ yds_round_buffersize(void *addr, int direction, size_t size)
 	return (size);
 }
 
-int
-yds_get_props(void *addr)
-{
-	return (AUDIO_PROP_FULLDUPLEX);
-}
-
 int
 yds_activate(struct device *self, int act)
 {
diff --git a/sys/dev/sbus/cs4231.c b/sys/dev/sbus/cs4231.c
index 9ef430ff6a2..a9b0c3d682d 100644
--- a/sys/dev/sbus/cs4231.c
+++ b/sys/dev/sbus/cs4231.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: cs4231.c,v 1.43 2022/10/19 19:14:17 kn Exp $	*/
+/*	$OpenBSD: cs4231.c,v 1.44 2022/10/26 20:19:09 kn Exp $	*/
 
 /*
  * Copyright (c) 1999 Jason L. Wright (jason@thought.net)
@@ -145,7 +145,6 @@ int	cs4231_get_port(void *, mixer_ctrl_t *);
 int	cs4231_query_devinfo(void *, mixer_devinfo_t *);
 void *	cs4231_alloc(void *, int, size_t, int, int);
 void	cs4231_free(void *, void *, int);
-int	cs4231_get_props(void *);
 int	cs4231_trigger_output(void *, void *, void *, int,
     void (*)(void *), void *, struct audio_params *);
 int	cs4231_trigger_input(void *, void *, void *, int,
@@ -164,7 +163,6 @@ const struct audio_hw_if cs4231_sa_hw_if = {
 	.query_devinfo = cs4231_query_devinfo,
 	.allocm = cs4231_alloc,
 	.freem = cs4231_free,
-	.get_props = cs4231_get_props,
 	.trigger_output = cs4231_trigger_output,
 	.trigger_input = cs4231_trigger_input,
 };
@@ -1179,12 +1177,6 @@ cs4231_query_devinfo(void *vsc, mixer_devinfo_t *dip)
 	return (err);
 }
 
-int
-cs4231_get_props(void *vsc)
-{
-	return (AUDIO_PROP_FULLDUPLEX);
-}
-
 /*
  * Hardware interrupt handler
  */
diff --git a/sys/dev/tc/bba.c b/sys/dev/tc/bba.c
index ea1050c7bb8..2ddd1becaf5 100644
--- a/sys/dev/tc/bba.c
+++ b/sys/dev/tc/bba.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: bba.c,v 1.11 2022/10/19 19:14:17 kn Exp $	*/
+/*	$OpenBSD: bba.c,v 1.12 2022/10/26 20:19:09 kn Exp $	*/
 /* $NetBSD: bba.c,v 1.38 2011/06/04 01:27:57 tsutsui Exp $ */
 /*
  * Copyright (c) 2011 Miodrag Vallat.
@@ -146,7 +146,6 @@ int	bba_halt_input(void *);
 void	*bba_allocm(void *, int, size_t, int, int);
 void	bba_freem(void *, void *, int);
 size_t	bba_round_buffersize(void *, int, size_t);
-int	bba_get_props(void *);
 int	bba_trigger_output(void *, void *, void *, int,
 	    void (*)(void *), void *, struct audio_params *);
 int	bba_trigger_input(void *, void *, void *, int,
@@ -166,7 +165,6 @@ const struct audio_hw_if bba_hw_if = {
 	.allocm = bba_allocm,
 	.freem = bba_freem,
 	.round_buffersize = bba_round_buffersize,
-	.get_props = bba_get_props,
 	.trigger_output = bba_trigger_output,
 	.trigger_input = bba_trigger_input,
 };
@@ -575,12 +573,6 @@ bba_intr(void *v)
 	return 0;
 }
 
-int
-bba_get_props(void *v)
-{
-	return am7930_get_props(v);
-}
-
 int
 bba_round_blocksize(void *v, int blk)
 {
diff --git a/sys/dev/usb/uaudio.c b/sys/dev/usb/uaudio.c
index e16b925c9c8..96ab39d23f1 100644
--- a/sys/dev/usb/uaudio.c
+++ b/sys/dev/usb/uaudio.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: uaudio.c,v 1.171 2022/10/19 19:14:17 kn Exp $	*/
+/*	$OpenBSD: uaudio.c,v 1.172 2022/10/26 20:19:09 kn Exp $	*/
 /*
  * Copyright (c) 2018 Alexandre Ratchov <alex@caoua.org>
  *
@@ -430,7 +430,6 @@ int uaudio_halt_input(void *);
 int uaudio_query_devinfo(void *, struct mixer_devinfo *);
 int uaudio_get_port(void *, struct mixer_ctrl *);
 int uaudio_set_port(void *, struct mixer_ctrl *);
-int uaudio_get_props(void *);
 
 int uaudio_process_unit(struct uaudio_softc *,
     struct uaudio_unit *, int,
@@ -477,7 +476,6 @@ const struct audio_hw_if uaudio_hw_if = {
 	.set_port = uaudio_set_port,
 	.get_port = uaudio_get_port,
 	.query_devinfo = uaudio_query_devinfo,
-	.get_props = uaudio_get_props,
 	.trigger_output = uaudio_trigger_output,
 	.trigger_input = uaudio_trigger_input,
 	.copy_output = uaudio_copy_output,
@@ -4174,12 +4172,6 @@ uaudio_halt_input(void *self)
 	return 0;
 }
 
-int
-uaudio_get_props(void *self)
-{
-	return AUDIO_PROP_FULLDUPLEX;
-}
-
 int
 uaudio_get_port_do(struct uaudio_softc *sc, struct mixer_ctrl *ctl)
 {