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[209.132.180.67]) by mx.google.com with ESMTP id t125si15709399pgc.528.2019.05.19.10.34.52; Sun, 19 May 2019 10:35:07 -0700 (PDT) Received-SPF: pass (google.com: best guess record for domain of linux-bluetooth-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67; Authentication-Results: mx.google.com; dkim=pass header.i=@gmail.com header.s=20161025 header.b=t+1SUGks; spf=pass (google.com: best guess record for domain of linux-bluetooth-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-bluetooth-owner@vger.kernel.org; dmarc=pass (p=NONE sp=QUARANTINE dis=NONE) header.from=gmail.com Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726434AbfESReo (ORCPT + 99 others); Sun, 19 May 2019 13:34:44 -0400 Received: from mail-wm1-f68.google.com ([209.85.128.68]:34715 "EHLO mail-wm1-f68.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726384AbfESReo (ORCPT ); Sun, 19 May 2019 13:34:44 -0400 Received: by mail-wm1-f68.google.com with SMTP id j187so12628624wma.1 for ; Sun, 19 May 2019 10:34:40 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=date:from:to:cc:subject:message-id:references:mime-version :content-disposition:in-reply-to:user-agent; bh=js9fSia3kX4O5FJhJrypV/8yBwMxu5cVd4WPmqxYK0w=; b=t+1SUGksHrQ3EhkV59lzqSbzOgXyOC3rpUd0BB4aI2H/APv1fKkCgcDr9d5j1Gelv2 dP8FhGmDxlRnb9DwuC9YTYmY51pfLPxba0dmvHzmbswZep9dr7GJuQ7CpzGsnBRQWT51 LPhpw/K9L6rMmZTH2bg1Ey27BufMB0IgHTvEDhrZi0TyU/c+tGQGiVXJmj6vpuL2YDHe B8k3V/CAPo/duWFpSrQxWq4BJyWuobVXRYta8WqTdGFJUgbG+SfxWJ205omceP8vAKrj FdqQrtJHr4jILSwrzkdMQfXFYO+NjGij4nyF4m6liYcWx6bPCbX+vExVciNORWZdBDPp L5GA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:date:from:to:cc:subject:message-id:references :mime-version:content-disposition:in-reply-to:user-agent; bh=js9fSia3kX4O5FJhJrypV/8yBwMxu5cVd4WPmqxYK0w=; b=XpsyRuWoX+fYbhc2U+QnzvlQhNDM9T1XhPwY2S9FDR7dEUGnRiD9BwjY2XJOVrsWbh DD9hIkViNP002q5z151bna9Wf6lz+3Nksa3VoNr9nCm+Wxd5p8RfQud9Y16jpoEw1RRK 50RIFc70MZ6OPinyz9YhT9kI46SBYHlYc/0hVrX8OfQcyFn8JJQTNGwNXLDNmfAjR9WR Xqu9LL3LJ4rsDSQfjFonnD8w7m6b1SOB+jVGWNxjJC3QQvQI0XuvnDZoVvlT9dkNMr+v wOzrv0eM4fviO6lizqssIatjchf/GLtnW/GsJ5ynxSWKFv5j6/QcgNplENjH0K6C2dPN P0Xg== X-Gm-Message-State: APjAAAUPyMhkvOqp2ct2xSIFNLF3wn14bO70ACIsDZmUTBFxEzDhxA8d H0basqv2vetieYQnyAxmIsutkwrA X-Received: by 2002:a1c:7511:: with SMTP id o17mr984309wmc.39.1558256098266; Sun, 19 May 2019 01:54:58 -0700 (PDT) Received: from pali ([2a02:2b88:2:1::5cc6:2f]) by smtp.gmail.com with ESMTPSA id s11sm24175271wrb.71.2019.05.19.01.54.57 (version=TLS1_2 cipher=ECDHE-RSA-CHACHA20-POLY1305 bits=256/256); Sun, 19 May 2019 01:54:57 -0700 (PDT) Date: Sun, 19 May 2019 10:54:56 +0200 From: Pali =?utf-8?B?Um9ow6Fy?= To: Luiz Augusto von Dentz Cc: "linux-bluetooth@vger.kernel.org" , Johan Hedberg , Marcel Holtmann , Pavel Machek Subject: Re: HCI Set custom bandwidth for AuriStream SCO codec Message-ID: <20190519085456.spa4nqkteic42u34@pali> References: <20190504171550.llqfv5674gxd3bnn@pali> <20190506151651.pu2us2fgsf7w2vos@pali> <20190516183429.ql3hxtnmiabcq7tj@pali> <20190519082305.q7y4gpmdhvx3vzvo@pali> MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="zdleugkuny5ohshi" Content-Disposition: inline In-Reply-To: User-Agent: NeoMutt/20170113 (1.7.2) Sender: linux-bluetooth-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-bluetooth@vger.kernel.org --zdleugkuny5ohshi Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Sunday 19 May 2019 11:45:02 Luiz Augusto von Dentz wrote: > Hi Pali, >=20 > On Sun, May 19, 2019 at 11:23 AM Pali Roh=C3=A1r w= rote: > > > > On Sunday 19 May 2019 11:16:00 Luiz Augusto von Dentz wrote: > > > Hi Pali, > > > > > > On Thu, May 16, 2019 at 9:34 PM Pali Roh=C3=A1r wrote: > > > > > > > > Ping, can you comment anything related to hardcoded bandwidth? > > > > > > > > I would really like to take next step how to expose API for changing > > > > bandwidth as linux kernel currently does not allow to receive and > > > > transmit voice encoded by AuriStream codec. > > > > > > Didn't even know such codec existed, anyway that is not using the > > > standard AT commands so it is kind hard to figure out how to set it up > > > properly, > > > > Yes, AT+CSRSF is not standard AT command, but CSR extension. Also there > > are e.g. more headsets which support Apple extensions to AT commands... > > And Apple has public documentation for it. > > > > > to be honest, I would rather see WBS implementation finally > > > reach PA before we start digging into this. > > > > First I want to finish improving A2DP codec support in pulseaudio. Later > > I can look at HSP/HFP profiles. Ideally it should have modular/plugin > > extensible design. So the aim is that adding new codec would be very > > simple, without need to hack something related to mSBC/WBC, AuriStream > > or any other codec. >=20 > Well HSP don't have support for codec negotiation, but yes a modular > design is probably recommended. Agree. > > But for AuriStream I need to set custom SCO parameters as described > > below and currently kernel does not support it. This is why I'm asking > > how kernel can export for userspace configuration of SCO parameters... >=20 > We can always come up with socket options but we got to see the value > it would bring As wrote in previous emails, CSR SDK uses following HCI settings for AuriStream: syncPktTypes =3D 0x003F bandwidth =3D 4000 max_latency =3D 16 voice_settings =3D 0x63 retx_effort =3D 2 And based on my experiments without setting bandwidth to 4000, connect() syscall fails. > since AuriStream don't look that popular among > headsets, at least Ive never seem any device advertising it like > apt-X, etc. I have never seen advertised AuriStream codec too. I just wanted to figure out what that mysterious AT+CSRSF means and figure out that it is CSR's custom HFP codec. Anyway, seems that there are lot of headsets with AuriStream codec. Put AT+CSRSF=3D0,0,0,0,0,7 to google search and would get lot of results of people who pasted bluetooth logs. So implementation of AuriStream can be really useful as it is already widely used. > > > > On Monday 06 May 2019 17:16:51 Pali Roh=C3=A1r wrote: > > > > > Ccing more people... > > > > > > > > > > do you have idea why for custom SCO HFP codec is needed to change > > > > > Transmit and Receive bandwidth in HCI Setup Synchronous Connection > > > > > packet? > > > > > > > > > > And how to expose API for userspace applications so they can chan= ge > > > > > hardcoded kernel bandwidth? Why is there value 8000? > > > > > > > > > > Without changing hardcoded value 8000 to 4000 I'm unable to open = SCO > > > > > socket for AuriStream codec in HFP profile. > > > > > > > > > > On Saturday 04 May 2019 19:15:50 Pali Roh=C3=A1r wrote: > > > > > > Hello, > > > > > > > > > > > > I found out that more bluetooth headsets supports AuriStream co= dec in > > > > > > bluetooth HSP/HFP profile. It is proprietary CSR codec describe= d as some > > > > > > ADPCM variant with better quality as default CVSD codec. > > > > > > > > > > > > Headset announce their support by sending command AT+CSRSF, in = sixth > > > > > > number with first or second bit set (counted from zero). E.g.: > > > > > > > > > > > > AT+CSRSF=3D0,0,0,0,0,7 > > > > > > > > > > > > Codec is then selected by host with sending: > > > > > > > > > > > > +CSRFN: (6,4) > > > > > > OK > > > > > > > > > > > > And answer from headset is acknowledged by another: > > > > > > > > > > > > OK > > > > > > > > > > > > > > > > > > Problem is that on Linux after issuing these AT commands I cann= ot longer > > > > > > connect to SCO socket. connect() fails with Protocol Error. > > > > > > > > > > > > And in btmon is following error: > > > > > > > > > > > > > HCI Event: Synchronous Connect Complete (0x2c) plen 17 > > > > > > Status: Invalid LMP Parameters / Invalid LL Paramet= ers (0x1e) > > > > > > > > > > > > > > > > > > In some CSR SKD is example how to activate it and there is code= which > > > > > > seems to sets following HCI connection parameters: > > > > > > > > > > > > syncPktTypes =3D 0x003F > > > > > > bandwidth =3D 4000 > > > > > > max_latency =3D 16 > > > > > > voice_settings =3D 0x63 > > > > > > retx_effort =3D 2 > > > > > > > > > > > > I figured out that voice_settings can be configured via setsock= opt() > > > > > > SOL_BLUETOOTH + BT_VOICE. But for some unknown reason linux ker= nel > > > > > > accept only two whitelisted values: 0x0003 and 0x0060. > > > > > > > > > > > > So I tried to set 0x0003 value (BT_VOICE_TRANSPARENT). > > > > > > > > > > > > In btmon I saw that kernel really changed "Air Coding Format" f= rom CVSD > > > > > > to Transparent, but I still got same "Invalid LMP Parameters" e= rror. > > > > > > > > > > > > I tried to remove that whilelist from BT_VOICE option via patch= below: > > > > > > > > > > > > diff --git a/net/bluetooth/sco.c b/net/bluetooth/sco.c > > > > > > index 9a580999ca57..06db91de4f23 100644 > > > > > > --- a/net/bluetooth/sco.c > > > > > > +++ b/net/bluetooth/sco.c > > > > > > @@ -231,7 +231,7 @@ static int sco_connect(struct sock *sk) > > > > > > else > > > > > > type =3D SCO_LINK; > > > > > > > > > > > > - if (sco_pi(sk)->setting =3D=3D BT_VOICE_TRANSPARENT && > > > > > > + if ((sco_pi(sk)->setting & SCO_AIRMODE_MASK) =3D=3D SCO_AIR= MODE_TRANSP && > > > > > > (!lmp_transp_capable(hdev) || !lmp_esco_capable(hdev)))= { > > > > > > err =3D -EOPNOTSUPP; > > > > > > goto done; > > > > > > @@ -836,13 +836,6 @@ static int sco_sock_setsockopt(struct sock= et *sock, int level, int optname, > > > > > > break; > > > > > > } > > > > > > > > > > > > - /* Explicitly check for these values */ > > > > > > - if (voice.setting !=3D BT_VOICE_TRANSPARENT && > > > > > > - voice.setting !=3D BT_VOICE_CVSD_16BIT) { > > > > > > - err =3D -EINVAL; > > > > > > - break; > > > > > > - } > > > > > > - > > > > > > sco_pi(sk)->setting =3D voice.setting; > > > > > > break; > > > > > > > > > > > > > > > > > > Btmon now really showed Settings as 0x63, but still did not wor= ked. > > > > > > Again exactly same HCI error. > > > > > > > > > > > > Next I tried hacking linux kernel to customize packet type and = max > > > > > > latency. But even I changed these values I still got that HCI e= rror. > > > > > > > > > > > > After I changed tx_bandwidth and rx_bandwidth to 4000 (as descr= ibed in > > > > > > above connection parameters), connect() syscall for that SCO so= cket > > > > > > succeeded and I started getting voice microphone data on that s= ocket. > > > > > > > > > > > > And it worked also with voice settings 0x0003 with active in-ke= rnel > > > > > > whitelist. > > > > > > > > > > > > Patch which is needed is following: Change bandwidth to 4000: > > > > > > > > > > > > diff --git a/net/bluetooth/hci_conn.c b/net/bluetooth/hci_conn.c > > > > > > index bd4978ce8c45..2dd4d0412971 100644 > > > > > > --- a/net/bluetooth/hci_conn.c > > > > > > +++ b/net/bluetooth/hci_conn.c > > > > > > @@ -283,8 +283,8 @@ bool hci_setup_sync(struct hci_conn *conn, = __u16 handle) > > > > > > > > > > > > cp.handle =3D cpu_to_le16(handle); > > > > > > > > > > > > - cp.tx_bandwidth =3D cpu_to_le32(0x00001f40); > > > > > > - cp.rx_bandwidth =3D cpu_to_le32(0x00001f40); > > > > > > + cp.tx_bandwidth =3D cpu_to_le32(4000); > > > > > > + cp.rx_bandwidth =3D cpu_to_le32(4000); > > > > > > cp.voice_setting =3D cpu_to_le16(conn->setting); > > > > > > > > > > > > switch (conn->setting & SCO_AIRMODE_MASK) { > > > > > > > > > > > > I have really no idea what it does with headset. But without th= is patch > > > > > > I'm not able to switch HSP codec from CVSD to AuriStream. > > > > > > > > > > > > Is somebody able to explain how above change can allow opening = SCO > > > > > > socket? > > > > > > > > > > > > Because without it I'm not able to activate AuriStream codec, c= ould you > > > > > > consider allowing userspace (via some setsockopt=C5=88 to chang= e bandwidth? > > > > > > Because now it is hardcoded in kernel source code. > > > > > > > > > > > > For more details here is btmon output with default bandwidth wh= ich is > > > > > > failing: > > > > > > > > > > > > $ sudo ./monitor/btmon > > > > > > Bluetooth monitor ver 5.50 > > > > > > =3D Note: Linux version 4.9.0-9-amd64 (x86_64) > > > > > > =3D Note: Bluetooth subsystem version 2.22 > > > > > > =3D New Index: XX:XX:XX:XX:XX:XX (Primary,USB,hci0) > > > > > > =3D Open Index: XX:XX:XX:XX:XX:XX > > > > > > =3D Index Info: XX:XX:XX:XX:XX:XX (Intel Corp.) > > > > > > @ MGMT Open: bluetoothd (privileged) version 1.14 > > > > > > @ MGMT Open: btmon (privileged) version 1.14 > > > > > > < HCI Command: Setup Synchronous Connection (0x01|0x0028) ple= n 17 > > > > > > Handle: 34 > > > > > > Transmit bandwidth: 8000 > > > > > > Receive bandwidth: 8000 > > > > > > Max latency: 13 > > > > > > Setting: 0x0003 > > > > > > Input Coding: Linear > > > > > > Input Data Format: 1's complement > > > > > > Input Sample Size: 8-bit > > > > > > # of bits padding at MSB: 0 > > > > > > Air Coding Format: Transparent Data > > > > > > Retransmission effort: Optimize for link quality (0x0= 2) > > > > > > Packet type: 0x0380 > > > > > > 3-EV3 may not be used > > > > > > 2-EV5 may not be used > > > > > > 3-EV5 may not be used > > > > > > > HCI Event: Command Status (0x0f) plen 4 > > > > > > Setup Synchronous Connection (0x01|0x0028) ncmd 1 > > > > > > Status: Success (0x00) > > > > > > > HCI Event: Max Slots Change (0x1b) plen 3 > > > > > > Handle: 34 > > > > > > Max slots: 1 > > > > > > > HCI Event: Synchronous Connect Complete (0x2c) plen 17 > > > > > > Status: Invalid LMP Parameters / Invalid LL Parameter= s (0x1e) > > > > > > Handle: 34 > > > > > > Address: XX:XX:XX:XX:XX:XX (Creative Technology, Ltd.) > > > > > > Link type: eSCO (0x02) > > > > > > Transmission interval: 0x00 > > > > > > Retransmission window: 0x00 > > > > > > RX packet length: 0 > > > > > > TX packet length: 0 > > > > > > Air mode: u-law log (0x00) > > > > > > > HCI Event: Max Slots Change (0x1b) plen 3 > > > > > > Handle: 34 > > > > > > Max slots: 5 > > > > > > > > > > > > And here is btmon output with above kernel patch which changes = bandwidth to 4000: > > > > > > > > > > > > $ sudo ./monitor/btmon > > > > > > Bluetooth monitor ver 5.50 > > > > > > =3D Note: Linux version 4.9.0-9-amd64 (x86_64) > > > > > > =3D Note: Bluetooth subsystem version 2.22 > > > > > > =3D New Index: XX:XX:XX:XX:XX:XX (Primary,USB,hci0) > > > > > > =3D Open Index: XX:XX:XX:XX:XX:XX > > > > > > =3D Index Info: XX:XX:XX:XX:XX:XX (Intel Corp.) > > > > > > @ MGMT Open: bluetoothd (privileged) version 1.14 > > > > > > @ MGMT Open: btmon (privileged) version 1.14 > > > > > > < HCI Command: Setup Synchronous Connection (0x01|0x0028) ple= n 17 > > > > > > Handle: 34 > > > > > > Transmit bandwidth: 4000 > > > > > > Receive bandwidth: 4000 > > > > > > Max latency: 13 > > > > > > Setting: 0x0003 > > > > > > Input Coding: Linear > > > > > > Input Data Format: 1's complement > > > > > > Input Sample Size: 8-bit > > > > > > # of bits padding at MSB: 0 > > > > > > Air Coding Format: Transparent Data > > > > > > Retransmission effort: Optimize for link quality (0x0= 2) > > > > > > Packet type: 0x0380 > > > > > > 3-EV3 may not be used > > > > > > 2-EV5 may not be used > > > > > > 3-EV5 may not be used > > > > > > > HCI Event: Command Status (0x0f) plen 4 > > > > > > Setup Synchronous Connection (0x01|0x0028) ncmd 1 > > > > > > Status: Success (0x00) > > > > > > > HCI Event: Max Slots Change (0x1b) plen 3 > > > > > > Handle: 34 > > > > > > Max slots: 1 > > > > > > > HCI Event: Synchronous Connect Complete (0x2c) plen 17 > > > > > > Status: Success (0x00) > > > > > > Handle: 38 > > > > > > Address: XX:XX:XX:XX:XX:XX (Creative Technology, Ltd.) > > > > > > Link type: eSCO (0x02) > > > > > > Transmission interval: 0x10 > > > > > > Retransmission window: 0x02 > > > > > > RX packet length: 40 > > > > > > TX packet length: 40 > > > > > > Air mode: Transparent (0x03) > > > > > > < SCO Data TX: Handle 38 flags 0x00 dlen 48 > > > > > > < ACL Data TX: Handle 34 flags 0x00 dlen 18 > > > > > > Channel: 105 len 14 [PSM 0 mode 0] {chan 0} > > > > > > 61 ef 15 0d 0a 2b 56 47 4d 3d 34 0d 0a d4 a...= =2E+VGM=3D4... > > > > > > > HCI Event: Number of Completed Packets (0x13) plen 5 > > > > > > Num handles: 1 > > > > > > Handle: 34 > > > > > > Count: 1 > > > > > > > SCO Data RX: Handle 38 flags 0x00 dlen 24 > > > > > > > SCO Data RX: Handle 38 flags 0x00 dlen 24 > > > > > > > SCO Data RX: Handle 38 flags 0x00 dlen 24 > > > > > > < SCO Data TX: Handle 38 flags 0x00 dlen 48 > > > > > > > HCI Event: Max Slots Change (0x1b) plen 3 > > > > > > Handle: 34 > > > > > > Max slots: 5 > > > > > > > > > > > > ... and SCO data are coming on SCO socket. > > > > > > > > > > > > > > > > > > > -- > > > > Pali Roh=C3=A1r > > > > pali.rohar@gmail.com > > > > > > > > > > > > > -- > > Pali Roh=C3=A1r > > pali.rohar@gmail.com --=20 Pali Roh=C3=A1r pali.rohar@gmail.com --zdleugkuny5ohshi Content-Type: application/pgp-signature; name="signature.asc" -----BEGIN PGP SIGNATURE----- iF0EABECAB0WIQS4VrIQdKium2krgIWL8Mk9A+RDUgUCXOEZ3gAKCRCL8Mk9A+RD Us0ZAJ9i2Fvxpsm6xen5+kvGCkxc1FiUyQCgpCMZMaaFlRGPrmSZAElbsxV7BEg= =0NYI -----END PGP SIGNATURE----- --zdleugkuny5ohshi--