SCO connection cannot be setup to devices that do not support retransmission. Patch based on http://permalink.gmane.org/gmane.linux.bluez.kernel/7779 and adapted for this kernel version. Code changed to check SCO/eSCO type before setting retransmission effort and max. latency. The purpose of the patch is to support older devices not capable of eSCO. Tested on Blackberry 655+ headset which does not support retransmission. Credits go to Alexander Sommerhuber. Signed-off-by: Bernhard Thaler <bernhard.thaler@xxxxxxx> --- net/bluetooth/hci_conn.c | 22 +++++++++++++++++----- 1 file changed, 17 insertions(+), 5 deletions(-) diff --git a/net/bluetooth/hci_conn.c b/net/bluetooth/hci_conn.c index faff624..32dcde1 100644 --- a/net/bluetooth/hci_conn.c +++ b/net/bluetooth/hci_conn.c @@ -38,7 +38,7 @@ struct sco_param { u16 max_latency; }; -static const struct sco_param sco_param_cvsd[] = { +static const struct sco_param esco_param_cvsd[] = { { EDR_ESCO_MASK & ~ESCO_2EV3, 0x000a }, /* S3 */ { EDR_ESCO_MASK & ~ESCO_2EV3, 0x0007 }, /* S2 */ { EDR_ESCO_MASK | ESCO_EV3, 0x0007 }, /* S1 */ @@ -46,6 +46,11 @@ static const struct sco_param sco_param_cvsd[] = { { EDR_ESCO_MASK | ESCO_HV1, 0xffff }, /* D0 */ }; +static const struct sco_param sco_param_cvsd[] = { + { EDR_ESCO_MASK | ESCO_HV3, 0xffff }, /* D1 */ + { EDR_ESCO_MASK | ESCO_HV1, 0xffff }, /* D0 */ +}; + static const struct sco_param sco_param_wideband[] = { { EDR_ESCO_MASK & ~ESCO_2EV3, 0x000d }, /* T2 */ { EDR_ESCO_MASK | ESCO_EV3, 0x0008 }, /* T1 */ @@ -194,10 +199,17 @@ bool hci_setup_sync(struct hci_conn *conn, __u16 handle) param = &sco_param_wideband[conn->attempt - 1]; break; case SCO_AIRMODE_CVSD: - if (conn->attempt > ARRAY_SIZE(sco_param_cvsd)) - return false; - cp.retrans_effort = 0x01; - param = &sco_param_cvsd[conn->attempt - 1]; + if (!lmp_esco_capable(conn->link)) { + if ((conn->attempt) > ARRAY_SIZE(sco_param_cvsd)) + return false; + cp.retrans_effort = 0xff; + param = &sco_param_cvsd[conn->attempt - 1]; + } else { + if (conn->attempt > ARRAY_SIZE(esco_param_cvsd)) + return false; + cp.retrans_effort = 0x01; + param = &esco_param_cvsd[conn->attempt - 1]; + } break; default: return false; -- 1.7.10.4 -- To unsubscribe from this list: send the line "unsubscribe linux-bluetooth" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
