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* [PATCH v4] Bluetooth: SCO: Add support for 16 bits transparent voice setting
@ 2024-12-06 18:17 Luiz Augusto von Dentz
  2024-12-06 18:37 ` [v4] " bluez.test.bot
  2024-12-11 15:20 ` [PATCH v4] " patchwork-bot+bluetooth
  0 siblings, 2 replies; 3+ messages in thread
From: Luiz Augusto von Dentz @ 2024-12-06 18:17 UTC (permalink / raw)
  To: linux-bluetooth

From: Frédéric Danis <frederic.danis@collabora.com>

The voice setting is used by sco_connect() or sco_conn_defer_accept()
after being set by sco_sock_setsockopt().

The PCM part of the voice setting is used for offload mode through PCM
chipset port.
This commits add support for mSBC 16 bits offloading, i.e. audio data
not transported over HCI.

The BCM4349B1 supports 16 bits transparent data on its I2S port.
If BT_VOICE_TRANSPARENT is used when accepting a SCO connection, this
gives only garbage audio while using BT_VOICE_TRANSPARENT_16BIT gives
correct audio.
This has been tested with connection to iPhone 14 and Samsung S24.

Fixes: ad10b1a48754 ("Bluetooth: Add Bluetooth socket voice option")
Signed-off-by: Frédéric Danis <frederic.danis@collabora.com>
Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>
---
 include/net/bluetooth/bluetooth.h |  1 +
 net/bluetooth/sco.c               | 29 +++++++++++++++--------------
 2 files changed, 16 insertions(+), 14 deletions(-)

diff --git a/include/net/bluetooth/bluetooth.h b/include/net/bluetooth/bluetooth.h
index e6760c11f007..435250c72d56 100644
--- a/include/net/bluetooth/bluetooth.h
+++ b/include/net/bluetooth/bluetooth.h
@@ -123,6 +123,7 @@ struct bt_voice {
 
 #define BT_VOICE_TRANSPARENT			0x0003
 #define BT_VOICE_CVSD_16BIT			0x0060
+#define BT_VOICE_TRANSPARENT_16BIT		0x0063
 
 #define BT_SNDMTU		12
 #define BT_RCVMTU		13
diff --git a/net/bluetooth/sco.c b/net/bluetooth/sco.c
index 40c4957cfc0b..aa7bfe26cb40 100644
--- a/net/bluetooth/sco.c
+++ b/net/bluetooth/sco.c
@@ -319,10 +319,13 @@ static int sco_connect(struct sock *sk)
 	else
 		type = SCO_LINK;
 
-	if (sco_pi(sk)->setting == BT_VOICE_TRANSPARENT &&
-	    (!lmp_transp_capable(hdev) || !lmp_esco_capable(hdev))) {
-		err = -EOPNOTSUPP;
-		goto unlock;
+	switch (sco_pi(sk)->setting & SCO_AIRMODE_MASK) {
+	case SCO_AIRMODE_TRANSP:
+		if (!lmp_transp_capable(hdev) || !lmp_esco_capable(hdev)) {
+			err = -EOPNOTSUPP;
+			goto unlock;
+		}
+		break;
 	}
 
 	hcon = hci_connect_sco(hdev, type, &sco_pi(sk)->dst,
@@ -920,13 +923,6 @@ static int sco_sock_setsockopt(struct socket *sock, int level, int optname,
 		if (err)
 			break;
 
-		/* Explicitly check for these values */
-		if (voice.setting != BT_VOICE_TRANSPARENT &&
-		    voice.setting != BT_VOICE_CVSD_16BIT) {
-			err = -EINVAL;
-			break;
-		}
-
 		sco_pi(sk)->setting = voice.setting;
 		hdev = hci_get_route(&sco_pi(sk)->dst, &sco_pi(sk)->src,
 				     BDADDR_BREDR);
@@ -934,9 +930,14 @@ static int sco_sock_setsockopt(struct socket *sock, int level, int optname,
 			err = -EBADFD;
 			break;
 		}
-		if (enhanced_sync_conn_capable(hdev) &&
-		    voice.setting == BT_VOICE_TRANSPARENT)
-			sco_pi(sk)->codec.id = BT_CODEC_TRANSPARENT;
+
+		switch (sco_pi(sk)->setting & SCO_AIRMODE_MASK) {
+		case SCO_AIRMODE_TRANSP:
+			if (enhanced_sync_conn_capable(hdev))
+				sco_pi(sk)->codec.id = BT_CODEC_TRANSPARENT;
+			break;
+		}
+
 		hci_dev_put(hdev);
 		break;
 
-- 
2.47.1


^ permalink raw reply related	[flat|nested] 3+ messages in thread
end of thread, other threads:[~2024-12-11 15:20 UTC | newest]

Thread overview: 3+ messages (download: mbox.gz follow: Atom feed
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2024-12-06 18:17 [PATCH v4] Bluetooth: SCO: Add support for 16 bits transparent voice setting Luiz Augusto von Dentz
2024-12-06 18:37 ` [v4] " bluez.test.bot
2024-12-11 15:20 ` [PATCH v4] " patchwork-bot+bluetooth

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