linux-kernel - Re: [PATCH v2] Bluetooth: Fix CVSD SCO setup failure

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Date:   Mon, 11 Jul 2022 10:03:10 +0800
From:   quic_zijuhu <quic_zijuhu@...cinc.com>
To:     <marcel@...tmann.org>, <johan.hedberg@...il.com>,
        <luiz.dentz@...il.com>, <davem@...emloft.net>,
        <edumazet@...gle.com>, <kuba@...nel.org>, <pabeni@...hat.com>
CC:     <linux-kernel@...r.kernel.org>, <linux-bluetooth@...r.kernel.org>,
        <linux-arm-msm@...r.kernel.org>
Subject: Re: [PATCH v2] Bluetooth: Fix CVSD SCO setup failure

On 6/24/2022 11:12 PM, quic_zijuhu wrote:
> On 6/9/2022 7:09 PM, Zijun Hu wrote:
>> It will set up SCO after all CVSD eSCO attempts failure, but
>> still fails to set up SCO finally due to wrong D1/D0 @retrans_effort
>> within @esco_param_cvsd, so change it from 0x1 to 0xff to avoid
>> Invalid HCI Command Parameters error.
>>
>> < HCI Command: Setup Synchrono.. (0x01|0x0028) plen 17  #3427
>>         Handle: 3
>>         Transmit bandwidth: 8000
>>         Receive bandwidth: 8000
>>         Max latency: 65535
>>         Setting: 0x0060
>>           Input Coding: Linear
>>           Input Data Format: 2's complement
>>           Input Sample Size: 16-bit
>>           # of bits padding at MSB: 0
>>           Air Coding Format: CVSD
>>         Retransmission effort: Optimize for power consumption (0x01)
>>         Packet type: 0x03c4
>>           HV3 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               #3428
>>       Setup Synchronous Connection (0x01|0x0028) ncmd 1
>>         Status: Success (0x00)
>>> HCI Event: Synchronous Connect Comp.. (0x2c) plen 17  #3429
>>         Status: Invalid HCI Command Parameters (0x12)
>>         Handle: 0
>>         Address: 14:3F:A6:47:56:15 (OUI 14-3F-A6)
>>         Link type: SCO (0x00)
>>         Transmission interval: 0x00
>>         Retransmission window: 0x00
>>         RX packet length: 0
>>         TX packet length: 0
>>         Air mode: u-law log (0x00)
>>
>> Signed-off-by: Zijun Hu <quic_zijuhu@...cinc.com>
>> ---
>>  net/bluetooth/hci_conn.c | 4 ++--
>>  1 file changed, 2 insertions(+), 2 deletions(-)
>>
>> diff --git a/net/bluetooth/hci_conn.c b/net/bluetooth/hci_conn.c
>> index 7829433d54c1..2627d5ac15d6 100644
>> --- a/net/bluetooth/hci_conn.c
>> +++ b/net/bluetooth/hci_conn.c
>> @@ -45,8 +45,8 @@ static const struct sco_param esco_param_cvsd[] = {
>>  	{ EDR_ESCO_MASK & ~ESCO_2EV3, 0x000a,	0x01 }, /* S3 */
>>  	{ EDR_ESCO_MASK & ~ESCO_2EV3, 0x0007,	0x01 }, /* S2 */
>>  	{ EDR_ESCO_MASK | ESCO_EV3,   0x0007,	0x01 }, /* S1 */
>> -	{ EDR_ESCO_MASK | ESCO_HV3,   0xffff,	0x01 }, /* D1 */
>> -	{ EDR_ESCO_MASK | ESCO_HV1,   0xffff,	0x01 }, /* D0 */
>> +	{ EDR_ESCO_MASK | ESCO_HV3,   0xffff,	0xff }, /* D1 */
>> +	{ EDR_ESCO_MASK | ESCO_HV1,   0xffff,	0xff }, /* D0 */
>>  };
>>  
>>  static const struct sco_param sco_param_cvsd[] = {
> could you code review for this change?
i have tested this change and it can fix this issue.