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alsa: emit a node "error" event when snd_pcm_start() fails

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This is meant to workaround a particular SoF firmware crash that requires the
device to be closed and re-opened to recover. This works in combination
with a WirePlumber monitor function that will destroy the node after
it enters this error state and will re-create it.
This commit is contained in:
George Kiagiadakis 2025-12-23 19:36:58 +02:00 • committed by Wim Taymans
parent 7f9a00cd94
commit 6a0c0d45ff
1 changed files with 13 additions and 0 deletions
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13
spa/plugins/alsa/alsa-pcm.c
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@ -2784,6 +2784,18 @@ static inline int do_drop(struct state *state)
return 0;
}
static inline int emit_node_error (struct spa_loop *loop,
bool async, uint32_t seq, const void *data, size_t size, void *user_data)
{
struct state *state = user_data;
struct spa_event event = SPA_EVENT_INIT(SPA_TYPE_EVENT_Node, SPA_NODE_EVENT_Error);
spa_log_info(state->log, "%s: emit SPA_NODE_EVENT_Error", state->name);
spa_node_emit_event(&state->hooks, &event);
return 0;
}
static inline int do_start(struct state *state)
{
int res;
@ -2792,6 +2804,7 @@ static inline int do_start(struct state *state)
if (!state->linked && (res = snd_pcm_start(state->hndl)) < 0) {
spa_log_error(state->log, "%s: snd_pcm_start: %s",
state->name, snd_strerror(res));
spa_loop_invoke(state->main_loop, emit_node_error, 0, NULL, 0, false, state);
return res;
}
state->alsa_started = true;