Bluetooth: btintel, msft, sco, iso, l2cap: support SSP audio hardware offload - #6031

Add HCI_OP_ENHANCED_ACCEPT_SYNC_CONN (0x043e) and hci_accept_sync()
so incoming eSCO/SCO connections on sockets configured with BT_CODEC
(data_path != 0) configure the controller data path (0x0c83) and
accept the synchronous connection over the offloaded PCM/SSP
transport instead of falling back to legacy
HCI_OP_ACCEPT_SYNC_CONN_REQ (0x0429).

Also allow setting BT_CODEC on listening SCO sockets and inherit
codec settings onto accepted child sockets.

Signed-off-by: Liam Girdwood <liam.r.girdwood@linux.intel.com>

Enable DDC 0x0130 (0x3f: LC3, SCO, A2DP SBC/AAC, LE Audio vendor
codec, and controller delay reporting) and DDC 0x0120 (0x0b: SCO,
LE ISO, and A2DP offload use cases) via HCI_Intel_Write_DDC (0xfc8b)
during btintel_configure_offload() so
HCI_Read_Local_Supported_Codecs_v2 (0x100d) and
HCI_Read_Local_Supported_Codec_Capabilities (0x100e) report all
hardware offload codecs supported by operational firmware.

Extend btintel_get_codec_config_data() to configure 16 kHz SCO
presets (0x01) for non-CVSD SCO codecs and 48 kHz 16-bit stereo SSP
offload (preset 0x22) for ACL and LE CIS/BIS links.

Signed-off-by: Liam Girdwood <liam.r.girdwood@linux.intel.com>

Add BT_CODEC getsockopt and setsockopt support to BTPROTO_ISO (for
HCI_TRANSPORT_LE_CIS and HCI_TRANSPORT_LE_BIS offload codecs such as
LC3 and vendor LE Audio codecs) and BTPROTO_L2CAP (for
HCI_TRANSPORT_ACL A2DP offload codecs such as Intel SBC 0x0002:0x0000
and AAC 0x0002:0x0002).

Update hci_iso_setup_path() to configure the controller data path
(0x0c83) and pass the offloaded data_path, codec ID, and vendor
CID/VID to HCI_LE_Setup_ISO_Data_Path (0x206e) when offload is
enabled.

Signed-off-by: Liam Girdwood <liam.r.girdwood@linux.intel.com>

Implement Microsoft HCI vendor extension (0xfc1e) subcommands
0x07..0x0b (HCI_VS_MSFT_Avdtp_Capabilities_Configuration, Avdtp_Open,
Avdtp_Start, Avdtp_Suspend, and Avdtp_Close) when
MSFT_FEATURE_MASK_AVDTP (BIT(10)) is advertised by the controller.

During msft_do_open(), query subcommand 0x07 and register the
controller's offloaded AVDTP Media Codec Service Capabilities (SBC
0x00 and MPEG-2,4 AAC 0x02) into hdev->local_codecs under
HCI_TRANSPORT_ACL.

When setsockopt(SOL_BLUETOOTH, BT_CODEC) is called on a BTPROTO_L2CAP
socket, invoke msft_avdtp_open() to open and start hardware A2DP
offload on the controller's SSP TDM interface, and automatically
suspend and close the stream when the L2CAP channel is released.

Signed-off-by: Liam Girdwood <liam.r.girdwood@linux.intel.com>

Configure 8 kHz SSP PCM preset 0x00 in btintel_get_codec_config_data()
for 8 kHz synchronous codecs (0x00 u-law, 0x01 A-law, 0x02 CVSD, 0x03
Transparent, and 0x04 Linear PCM) while keeping 16 kHz preset 0x01
for 0x05 mSBC.

Update hci_enhanced_setup_sync() and hci_enhanced_accept_sync() to
pass the requested over-the-air coding format ID for G.711 u-law
(0x00) and A-law (0x01) connections instead of hardcoding CVSD (0x02).

Signed-off-by: Liam Girdwood <liam.r.girdwood@linux.intel.com>

Configure 16 kHz SSP offload preset 0x01 for LE CIS and BIS links in
btintel_get_codec_config_data().

When setting up an offloaded LE Audio ISO data path (path != 0) with
BT_CODEC_LC3 (0x06), populate the mandatory Bluetooth SIG LC3 LTV
Codec_Specific_Configuration (Sampling_Frequency, Frame_Duration, and
Octets_Per_Codec_Frame) derived from conn->iso_qos in
hci_iso_setup_path() so the controller's hardware LC3 encoder and
decoder accept HCI_LE_Setup_ISO_Data_Path (0x206e).

Also propagate the listening socket's BT_CODEC configuration onto
hcon->codec in iso_conn_ready() so incoming CIS Peripheral connections
configure the offloaded SSP data path as well.

Signed-off-by: Liam Girdwood <liam.r.girdwood@linux.intel.com>