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@expliyh expliyh commented Nov 15, 2025

Note: Please adhere to Contributing Guidelines.

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Comment on lines +761 to +766
call_count = get_using_call_count(call->hf);
if (call_count > 1) {
if (incoming) {
atomic_test_bit(call->flags, BT_HFP_HF_CALL_INCOMING_3WAY);
} else {
atomic_test_bit(call->flags, BT_HFP_HF_CALL_OUTGOING_3WAY);

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P1 Badge Mark 3‑way calls by setting, not testing, the flag

When parsing AT+CLCC, set_call_incoming_flag is supposed to flag calls as INCOMING_3WAY or OUTGOING_3WAY once more than one call is active. The implementation uses atomic_test_bit in both branches, which only reads the bit and never sets it. As a result the flag stays clear, the subsequent clcc_handle check sees incoming as false for every 3‑way call, logs a direction mismatch and returns early, so the second call is never tracked. Replace the atomic_test_bit calls with a setter (atomic_set_bit or atomic_set_bit_to) so the flags are actually recorded.

Useful? React with 👍 / 👎.

Extend the function `bt_sdp_discover` to support service search
transaction and service attribute transaction.

Improve the `session->rec_buf`. If the net buffer cannot be allocated
from the channel, disconnect the SDP session.

Set the `MaximumAttributeByteCount` of the request
`SDP_SERVICE_SEARCH_ATTR_REQ` with the tail room of `session->rec_buf`.

Set the `MaximumAttributeByteCount` of the request `SDP_SERVICE_ATTR_REQ`
with the tail room of `session->rec_buf`.

Set the `MaximumServiceRecordCount` of the request
`SDP_SERVICE_SEARCH_REQ` according to the tail room of
`session->rec_buf`.

Handle the response code `SDP_SERVICE_SEARCH_RSP`, and
`SDP_SERVICE_ATTR_RSP`.

Handle the error `SDP_ERROR_RSP`. Start the next SDP discovery if the
error received.

If there no more request, disconnect the session.

If the request cannot be sent, start the next SDP discovery.

Signed-off-by: Lyle Zhu <lyle.zhu@nxp.com>
Add set the parameter `type` to value
`BT_SDP_DISCOVER_SERVICE_SEARCH_ATTR`.

Update the SDP discovery callback function by adding a third parameter
`const struct bt_sdp_discover_params *params`. Make it align with
`bt_sdp_discover_func_t`.

Signed-off-by: Lyle Zhu <lyle.zhu@nxp.com>
Currently, the minimum value of encryption key size is
`BT_HCI_ENCRYPTION_KEY_SIZE_MIN`.

Add a new Kconfig `BT_BR_MIN_ENC_KEY_SIZE`. It is used to set the
specific minimum encryption key size.
The default value is `BT_SMP_MIN_ENC_KEY_SIZE`. And it can be
configured if `BT_SMP_SC_ONLY` is not enabled.

Use `CONFIG_BT_BR_MIN_ENC_KEY_SIZE` as minimum encryption key size in
`br_sufficient_key_size`.

Signed-off-by: Lyle Zhu <lyle.zhu@nxp.com>
Actively disconnect the connection with error code `BT_HCI_ERR_AUTH_FAIL`
when the notified link key type is not `BT_LK_AUTH_COMBINATION_P256` in
BR SC only mode.

Signed-off-by: Lyle Zhu <lyle.zhu@nxp.com>
The discovered SDP record of service attribute transaction response
cannot notified correctly. There is an error returned from function
`get_record_len()`.

For service attribute transaction response, only one attribute list
is returned. So the total record length is the buffer length. Return
buffer length directly from `get_record_len()` to fix the issue.

Signed-off-by: Lyle Zhu <lyle.zhu@nxp.com>
In current implementation, the SDP response packet will be ignored if
the operation code is `BT_SDP_ERROR_RSP`. And the SDP transaction
request is done, but the application is not notified. And the pending
SDP transaction cannot be processed.

Notify application with empty buffer if the operation code is
`BT_SDP_ERROR_RSP`. And process the pending SDP transaction.

Signed-off-by: Lyle Zhu <lyle.zhu@nxp.com>
Add Kconfig to configure the HF `CLI` and `VOLUME` features.

Add a macro `BT_HFP_HF_SDP_SUPPORTED_FEATURES` for SDP HF record.

Signed-off-by: Lyle Zhu <lyle.zhu@nxp.com>
Add a function at_get_string to get the string from the received AT
result code.

Signed-off-by: Lyle Zhu <lyle.zhu@nxp.com>
Handle the unsolicited result code +CLIP.

Add a callback `clip` to notify the application if the configuration
`CONFIG_BT_HFP_HF_CLI` is enabled.

Signed-off-by: Lyle Zhu <lyle.zhu@nxp.com>
Add tx pending queue to queue call AT commands.

Add a function bt_hfp_hf_cli to enable/disable CLI notification.

Signed-off-by: Lyle Zhu <lyle.zhu@nxp.com>
Only send AT command `AT+CMEE=1` if HFP_AG supports "Extended Error
result code".

Signed-off-by: Lyle Zhu <lyle.zhu@nxp.com>
Handle the unsolicited result code +VGS and +VGM if the configuration
`CONFIG_BT_HFP_HF_VOLUME` is enabled.

Add a callback `vgm` to notify the application speaker microphone
notification if the configuration `CONFIG_BT_HFP_HF_VOLUME` is enabled.

Add a callback `vgs` to notify the application speaker gain
notification if the configuration `CONFIG_BT_HFP_HF_VOLUME` is enabled.

Signed-off-by: Lyle Zhu <lyle.zhu@nxp.com>
Add function bt_hfp_hf_vgm to configure Gain of Microphone.

Add function bt_hfp_hf_vgs to configure Gain of Speaker.

These functions are controlled by configuration
`CONFIG_BT_HFP_HF_VOLUME`.

Signed-off-by: Lyle Zhu <lyle.zhu@nxp.com>
The AT command `AT+CLIP=1` or `AT+CLIP=0` cannot be parsed correctly.

Check `=` before get AT command value.

Signed-off-by: Lyle Zhu <lyle.zhu@nxp.com>
It is a debug log message. It should be logged by LOG_DBG instead of
LOG_ERR.

Signed-off-by: Lyle Zhu <lyle.zhu@nxp.com>
All set flags are cleared when call is terminated. But for case that
SLC is not disconnected, only call related flags should be cleared.

Just clear call related flags if the call is terminated.

Signed-off-by: Lyle Zhu <lyle.zhu@nxp.com>
Handle the unsolicited result code +BSIR issued by the AG to indicate
to the HF that the in-band ring tone setting has been locally changed.

Add a callback `inband_ring` to notify the in-band ring tone setting.

Signed-off-by: Lyle Zhu <lyle.zhu@nxp.com>
Handle AT commands AT+VGM and AT+VGS.

Add function to notify microphone and speaker gain.

Signed-off-by: Lyle Zhu <lyle.zhu@nxp.com>
Support separator "=".

If the separator is "=", only when result code is VGS" or "VGM", the
result code is valid.

Signed-off-by: Lyle Zhu <lyle.zhu@nxp.com>
Add AT command sending structure to queue all AT commander needed to
be sent after the SLC established.

After the SLC established, send AT command line one by one.

Signed-off-by: Lyle Zhu <lyle.zhu@nxp.com>
Send AT command AT+VGM and AT+VGS after SLC established.

The `VGM` and `VGS` can be set by calling function `bt_hfp_hf_vgs` and
`bt_hfp_hf_vgs` in HF connection callback.

Signed-off-by: Lyle Zhu <lyle.zhu@nxp.com>
Add function `bt_hfp_hf_get_operator` to read the currently network
operator of AG.

Add callback `operator` to notify the application of the response.

Signed-off-by: Lyle Zhu <lyle.zhu@nxp.com>
Expose a function to set the network operator and mode.

Response the AT+COPS? command with set mode and operator.

Signed-off-by: Lyle Zhu <lyle.zhu@nxp.com>
Add a function `bt_hfp_hf_accept` to accept the incoming call.

Add a flag BT_HFP_HF_FLAG_INCOMING to identify the incoming call.
Set the flag if the call_setup value is 1.

Signed-off-by: Lyle Zhu <lyle.zhu@nxp.com>
Add a dedicated SDP features definition.

Set feature "Three-way calling" by default both in SDP features
definition and AT command features definition. Because it is set
by default in Spec.

Signed-off-by: Lyle Zhu <lyle.zhu@nxp.com>
Add a configuration BT_HFP_AG_EXT_ERR for this feature.

If the feature is not set, response the ERROR to the peer if the AT
command AT+CMEE received.

Signed-off-by: Lyle Zhu <lyle.zhu@nxp.com>
Add a configuration BT_HFP_AG_CODEC_NEG to configure the feature.

Add a function bt_hfp_ag_audio_connect to setup the codec negotiation
procedure.

Improve AT+BAC and AT+BCC handle.

Add callback codec_negotiate to notify the application of codec
negotiation result.

Signed-off-by: Lyle Zhu <lyle.zhu@nxp.com>
Add the configuration `BT_HFP_HF_CODEC_NEG` to configure the codec
negotiation feature.

Add a configuration `BT_HFP_HF_CODEC_MSBC` to support mSBC codec.

Add a configuration `BT_HFP_HF_CODEC_LC3_SWB` to support LC3 SWB codec.

Add a function `bt_hfp_hf_audio_connect` to trigger audio connection
sequence.

Add a function `bt_hfp_hf_select_codec` to response the codec
negotiation request.

Add a function `bt_hfp_hf_set_codecs` to notify the AG supported Codec
IDs of HF.

Handle unsolicited response `+BCS` sent from AG.

Send supported Codec IDs supported by HF if the SLC is established.

Signed-off-by: Lyle Zhu <lyle.zhu@nxp.com>
Add a function `bt_hfp_ag_inband_ringtone` to enable/disable inband
ringtone.

Signed-off-by: Lyle Zhu <lyle.zhu@nxp.com>
lylezhu2012 and others added 24 commits November 15, 2025 11:24
There is an issue that the SCO connect cannot be un-referenced by HFP
AG when the SCO connection is broken if the SCO connect is not created
by HFP AG.

Register SCO connect change callback. And un-reference the SCO connect
in SCO disconnected callback.

Signed-off-by: Lyle Zhu <lyle.zhu@nxp.com>
Use `const` to modify the field `ops` of the structure
`struct bt_sco_chan`.

Signed-off-by: Lyle Zhu <lyle.zhu@nxp.com>
bug: v/74979
Signed-off-by: liyuheng <liyuheng@xiaomi.com>
Save the air_mode to SCO connect object.

Add a structure `struct bt_conn_sco_info` to return the SCO conn info.

Return SCO info through `struct bt_conn_sco_info` when calling the
function `bt_conn_get_info()`.

Signed-off-by: Lyle Zhu <lyle.zhu@nxp.com>
In current implementation, the SLC connected event will be early
notified. It causes the SLC state of AG is not aligned with the state
of HF.

The SLC connected event should be notified after the procedure of HF
indicators is done if the HF indicators feature is supported by both
devices.

Do not notify the SLC connected event after the AG has successfully
responded with information about how call hold and multiparty services
are supported if the HF indicators feature is supported by both
devices.

Notify the SLC connected event after the procedure of HF indicators is
done.

Signed-off-by: Lyle Zhu <lyle.zhu@nxp.com>
Due to the flag `BT_HFP_HF_FLAG_CLCC_PENDING` is set when receiving
the +CIEV or +CIND notification, the command `AT+CLCC` will be
pending due to the flag is not cleared.

Add a flag `BT_HFP_HF_FLAG_INITIATING` to indicate the HF
initialization is ongoing.

Add a flag `BT_HFP_HF_FLAG_QUERY_CALLS` to indicate the current calls
list needs to be queried.

Set the flag `BT_HFP_HF_FLAG_INITIATING` at the beginning of the HF
initialization. Set the flag `BT_HFP_HF_FLAG_QUERY_CALLS` instead of
setting the flag `BT_HFP_HF_FLAG_CLCC_PENDING` if the current calls
list needs to be queried and the flag `BT_HFP_HF_FLAG_INITIATING` is
set.

After the HF initialization is done, query list of the current calls
by calling the function `hf_query_current_calls()` if the flag
`BT_HFP_HF_FLAG_QUERY_CALLS` is set.

Set the flag `BT_HFP_HF_FLAG_CLCC_PENDING` if it is not set in the
function `hf_query_current_calls()`.

Signed-off-by: Lyle Zhu <lyle.zhu@nxp.com>
The MTU of HFP HF or AG is fixed value. It cannot be configured.

Fix the issue to make the MTU of RFCOMM is consistency with the MTU
of L2CAP.

Signed-off-by: Lyle Zhu <lyle.zhu@nxp.com>
Add the function `bt_hfp_hf_query_list_of_current_calls()` to support
users to query current call list.

Add the callback `bt_hfp_hf_cb::query_call` to notify the received
current calls.

Signed-off-by: Lyle Zhu <lyle.zhu@nxp.com>
The current calls list should not be queried if the SLC is not
connected. Or the error `-ENOTCONN` will be returned by function
`hf_query_current_calls()`.

Check the connection status of HF before submitting a delay-able
worker. Only the SLC is established, submit the delay-able worker.

Signed-off-by: Lyle Zhu <lyle.zhu@nxp.com>
The buffer `BT_RFCOMM_BUF_SIZE` is used to define the TX buffer size of
TX pool.

In current implementation, the TX buffer size of RFCOMM cannot be
calculated due to the macro `BT_RFCOMM_BUF_SIZE` is defined in internal
header file `rfcomm_internal.h`.

Move the macro `BT_RFCOMM_BUF_SIZE` form internal header file
`rfcomm_internal.h` to interface `rfcomm.h`.

Signed-off-by: Lyle Zhu <lyle.zhu@nxp.com>
None of these files actually use anything from the hci_driver.h header
file.

Signed-off-by: Johan Hedberg <johan.hedberg@silabs.com>
Because the number of ACL RX buffers must be at least the number of
maximum connections plus one, increasing `CONFIG_BT_MAX_CONN` could
inadvertently lead to a build failure if the number of ACL RX buffers is
not also increased. This dependency may not be obvious to users.

To address this issue, this commit deprecates the
`CONFIG_BT_BUF_RX_COUNT` Kconfig symbol and computes the value in
`buf.h` using the new `BT_BUF_RX_COUNT` define. Note that the default
value and the minimum range value have been changed to 0 to "disable"
the option.

Additionally, to allow users to increase the number of ACL RX buffers,
this commit introduces the new `CONFIG_BT_BUF_RX_COUNT_EXTRA` Kconfig
symbol. The value of this symbol will be added to the computed value of
`BT_BUF_RX_COUNT`.

The configurations of tests and samples have been updated to reflect
these changes.

Signed-off-by: Théo Battrel <theo.battrel@nordicsemi.no>
In the function `bt_rfcomm_server_register()`, the channel cannot be
dynamic allocated. And only pre-set channel is supported.

Improve the function `bt_rfcomm_server_register()` to support the
dynamic channel allocation if the passed channel is zero.

Signed-off-by: Lyle Zhu <lyle.zhu@nxp.com>
In current implementation, the `accept` cannot be identified if the
same one `accept` callback is passed by the upper layer.

Similar with `accept` of `bt_l2cap_server.accept`, add a parameter
`server` to the `bt_rfcomm_server.accept` callback.

Add a argument `server` to function bt_hfp_hf_accept() to avoid
building issue for HFP_HF.

Add a argument `server` to function rfcomm_accept() to avoid building
issue for shell/rfcomm.c.

Signed-off-by: Lyle Zhu <lyle.zhu@nxp.com>
Add support for Remote Port Negotiation (RPN) commands in the RFCOMM.
This allows applications to configure the serial port parameters
over RFCOMM connections, such as baud rate, data bits, stop bits, parity
and flow control.

Changes include:
- Add enumerations for RPN parameters (baud rate, data bits, stop bits,
  parity)
- Add a public API function bt_rfcomm_send_rpn_cmd() to send RPN
  commands
- Add shell command to test RPN with default parameters

This functionality is required by certain Bluetooth profiles that use
RFCOMM and need to configure serial port parameters.

Signed-off-by: Jiawei Yang <jiawei.yang_1@nxp.com>
The CR bit in DISC frames should be set as a command rather than a
response.
This patch fixes the rfcomm_send_disc function to correctly use
BT_RFCOMM_CMD_CR instead of BT_RFCOMM_RESP_CR when setting the CR bit in
the address field of DISC frames.

Signed-off-by: Jiawei Yang <jiawei.yang_1@nxp.com>
The MTU calculation in rfcomm_connected() was incorrectly adding the FCS
size instead of subtracting it.
This could lead to buffer overflows when sending data that exceeds
the actual available space.

Fix the calculation by properly subtracting both the RFCOMM header size and
the FCS size from the L2CAP MTU to get the correct RFCOMM session MTU.

Signed-off-by: Jiawei Yang <jiawei.yang_1@nxp.com>
There are two main issues found with using DLC TX thread,
Issue 1, the RAM consumption. Every DLC will have a dedicated thread
and thread stack.
Issue 2, the thread stack overflow issue. There is no way to strike a
balance between stack size and RAM consumption. Since the deep of call
stack is depended on the upper layer, the thread stack needs to set by
application. Due to the thread stack of DLC is dedicated, RAM
consumption is the product of the added value and the number of DLCs.

Use a TX worker to replace DLC TX thread.

Signed-off-by: Lyle Zhu <lyle.zhu@nxp.com>
bug: v/74979

Signed-off-by: liyuheng <liyuheng@xiaomi.com>
bug: v/74979

Change `buf_max_len` field from `uint8_t` to `uint16_t` in `struct at_client` for it may larger than 255

Signed-off-by: liyuheng <liyuheng@xiaomi.com>
bug: v/74979

Signed-off-by: liyuheng <liyuheng@xiaomi.com>
bug: v/74979

Signed-off-by: liyuheng <liyuheng@xiaomi.com>
bug: v/74979

Signed-off-by: liyuheng <liyuheng@xiaomi.com>
bug: v/74979
Signed-off-by: YuhengLi <liyuheng@xiaomi.com>
@expliyh expliyh closed this Nov 15, 2025
@expliyh expliyh reopened this Nov 15, 2025
@expliyh expliyh closed this Nov 15, 2025
@expliyh expliyh deleted the dev-hfp-zephyr-hf branch December 10, 2025 12:51
expliyh pushed a commit that referenced this pull request Dec 22, 2025
bug: v/79392

Settings adaptation for multi-controller changes, include:
1. The settings-related API add 'dev_id' parameter for identifying Controller IDs.
2. Change the format of key_str from /* bt/<keys>/<id>(option) / to / bt/<keys>/<dev_id>/<id>(option) */.
3. According #2, modify the logic for `bt_settings_encode/decode_key`.
4. Convert `store_irk_work` and `store_id_work` from global variables to hdev member variables.

Signed-off-by: liuxiang18 <liuxiang18@xiaomi.com>
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6 participants