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alsa: adjust ucm sink/source priority according to ports priority

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On the machines with the ucm used, the different input/output devices
often have different pcm stream, so they often belong to different
sources and sinks, this is greatly different from the design of all
devices connected to a codec (without ucm).

For example, on a machine with ucm2 used:
the internal dmic is on source#0
the external mic is on the source#1
the internal spk is on sink#0
the external headphone is on sink#1

Users expect that after plugging the external device, it will become
the active device automatically. The switch-on-port-available could
make it to be the active_port on its own source/sink, but can't make
source/sink to be default_source/sink since the sources/sinks belong
to the same profile (HiFi usually).

If we adjust the source/sink priority according to ucm ports priority,
the device_port.c could handle the default_source/sink changing then.
Usually we set higher priority for external device than internal
device in the ucm.

In order to bring the lowest side effect on the source/sink priority,
I change the ucm priority to units digit first, then add it to the
original priority.

Signed-off-by: Hui Wang <hui.wang@canonical.com>
This commit is contained in:
Hui Wang 2020-06-11 15:49:05 +08:00 • committed by Tanu Kaskinen
parent 0e691b9664
commit c8653c13fa
2 changed files with 26 additions and 0 deletions
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13
src/modules/alsa/alsa-sink.c
View file

@ -2598,6 +2598,19 @@ pa_sink *pa_alsa_sink_new(pa_module *m, pa_modargs *ma, const char*driver, pa_ca
goto fail;
}
if (u->ucm_context) {
pa_device_port *port;
void *state;
unsigned h_prio = 0;
PA_HASHMAP_FOREACH(port, u->sink->ports, state) {
if (!h_prio || port->priority > h_prio)
h_prio = port->priority;
}
/* ucm ports prioriy is 100, 200, ..., 900, change it to units digit */
h_prio = h_prio / 100;
u->sink->priority += h_prio;
}
if (pa_modargs_get_value_u32(ma, "deferred_volume_safety_margin",
&u->sink->thread_info.volume_change_safety_margin) < 0) {
pa_log("Failed to parse deferred_volume_safety_margin parameter");