That one's clear enough from the earlier log snippet and source:
Aug 29 00:54:47 RhoPC bluetoothd[4046739]: src/profile.c:ext_connect() Headset
Voice gateway connected to FC:58:FA:7F:E5:18
Aug 29 00:54:47 RhoPC bluetoothd[4046739]: src/service.c:change_state()
0x562f6441d710: device FC:58:FA:7F:E5:18 profile Headset Voice gateway state
changed: disconnected -> connecting (0)
Aug 29 00:54:47 RhoPC bluetoothd[4046739]: src/service.c:change_state()
0x562f6441d710: device FC:58:FA:7F:E5:18 profile Headset Voice gateway state
changed: connecting -> connected (0)
This ext_connect() seems to be called whenever a profile connection is
completed, whether successfully or not, whether locally or remotely
initiated. Above, we see the state changes it orchestrated -- it first
transitions the HFP "service" to CONNECTING and then to CONNECTED pretty
quickly:
if (conn->service && service_set_connecting(conn->service) < 0)
goto drop;
...
if (conn->service)
btd_service_connecting_complete(conn->service,
err ? -err->code : -EIO);
Each of these state changes gets propagated to a bunch of listeners --
one of which is policy.c.
=========================
I think that first transition (to CONNECTING) should not have happened, because
it takes away the ability of any listeners to judge whether a connection was
locally or remotely initiated, and act accordingly. The HFP service should've
simply gone from DISCONNECTED to CONNECTED -- that first IF block should be
removed entirely.
=========================
If a connection were indeed locally initiated, the service's state
would've been set to CONNECTING way back, by btd_service_connect()
probably since it looks to be the one that kicks off the connection.
ext_connect() only has enough info to make that final jump to CONNECTED.
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https://bugs.launchpad.net/bugs/1941977
Title:
PC streams music over low-quality HFP/SCO connection, instead of
A2DP/AVDTP
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