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SubjectRe: [PATCH] Bluetooth: Add SCO fallback for invalid LMP parameters error
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Hi Hsin-Yu,

> Bluetooth PTS test case HFP/AG/ACC/BI-12-I accepts SCO connection
> with invalid parameter at the first SCO request expecting AG to
> attempt another SCO request with the use of "safe settings" for
> given codec, base on section 5.7.1.2 of HFP 1.7 specification.
>
> This patch addresses it by adding "Invalid LMP Parameters" (0x1e)
> to the SCO fallback case. Verified with below log:
>
> < HCI Command: Setup Synchronous Connection (0x01|0x0028) plen 17
> Handle: 256
> 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 (0x02)
> 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: Number of Completed Packets (0x13) plen 5
> Num handles: 1
> Handle: 256
> Count: 1
>> HCI Event: Max Slots Change (0x1b) plen 3
> Handle: 256
> Max slots: 1
>> HCI Event: Synchronous Connect Complete (0x2c) plen 17
> Status: Invalid LMP Parameters / Invalid LL Parameters (0x1e)
> Handle: 0
> Address: 00:1B:DC:F2:21:59 (OUI 00-1B-DC)
> Link type: eSCO (0x02)
> Transmission interval: 0x00
> Retransmission window: 0x02
> RX packet length: 0
> TX packet length: 0
> Air mode: Transparent (0x03)
> < HCI Command: Setup Synchronous Connection (0x01|0x0028) plen 17
> Handle: 256
> Transmit bandwidth: 8000
> Receive bandwidth: 8000
> Max latency: 8
> 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 (0x02)
> Packet type: 0x03c8
> EV3 may be used
> 2-EV3 may not be used
> 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: 256
> Max slots: 5
>> HCI Event: Max Slots Change (0x1b) plen 3
> Handle: 256
> Max slots: 1
>> HCI Event: Synchronous Connect Complete (0x2c) plen 17
> Status: Success (0x00)
> Handle: 257
> Address: 00:1B:DC:F2:21:59 (OUI 00-1B-DC)
> Link type: eSCO (0x02)
> Transmission interval: 0x06
> Retransmission window: 0x04
> RX packet length: 30
> TX packet length: 30
> Air mode: Transparent (0x03)
>
> Signed-off-by: Hsin-Yu Chao <hychao@chromium.org>
> ---
> net/bluetooth/hci_event.c | 1 +
> 1 file changed, 1 insertion(+)

patch has been applied to bluetooth-next tree.

Regards

Marcel

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