diff options
| -rw-r--r-- | cras/src/server/cras_hfp_slc.c | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/cras/src/server/cras_hfp_slc.c b/cras/src/server/cras_hfp_slc.c index 65e5e652..d3f9e5fb 100644 --- a/cras/src/server/cras_hfp_slc.c +++ b/cras/src/server/cras_hfp_slc.c @@ -607,6 +607,26 @@ static int operator_selection(struct hfp_slc_handle *handle, const char *buf) return hfp_send(handle, AT_CMD("OK")); } +/* The AT+CHLD command is used to control call hold, release, and multiparty + * states. + */ +static int call_hold(struct hfp_slc_handle *handle, const char *buf) +{ + int rc; + + // Chrome OS doesn't yet support CHLD features but we need to reply + // the query with an empty feature list rather than "ERROR" to increase + // interoperability with certain devices (b/172413440). + if (strlen(buf) > 8 && buf[7] == '=' && buf[8] == '?') { + rc = hfp_send(handle, AT_CMD("+CHLD:")); + if (rc) + return rc; + return hfp_send(handle, AT_CMD("OK")); + } + + return hfp_send(handle, AT_CMD("ERROR")); +} + /* AT+CIND command retrieves the supported indicator and its corresponding * range and order index or read current status of indicators. Mandatory * support per spec 4.2. @@ -1062,6 +1082,7 @@ static struct at_command at_commands[] = { { "AT+VTS", dtmf_tone }, { "AT+XAPL", apple_supported_features }, { "AT+XEVENT", vendor_specific_features }, + { "AT+CHLD", call_hold }, { 0 } }; |