Monorepo for Aesthetic.Computer
aesthetic.computer
native: force runtime-PM off from audio_init (after card is probed)
The init-script sysfs write fired too early — before the sound card
was probed, so the power/control node may not have existed. Move the
runtime-PM disable into audio_init after the mixer walk, using the
known card_idx to target the exact sysfs node. Also set
autosuspend_delay_ms=-1 as a belt-and-suspenders backstop.
G7 log showed partial improvement (amp stayed on 37s vs 23s before)
but still powered down at 50.96s — this should keep it permanently.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
+31
+31
fedac/native/src/audio.c
+31
fedac/native/src/audio.c
···
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audio->running = 1;
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pthread_create(&audio->thread, NULL, audio_thread_fn, audio);
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+
/* Force PCI runtime-PM to "on" for the sound card now that the
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* driver is loaded and card_idx is known. The init-script attempt
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* may fire before probe — doing it here guarantees the sysfs node
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* exists. Without this the SOF DSP auto-suspends after ~20-40s
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* of silence, which stops the SSP1 BE DAI and drops MAX98360A
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* sdmode to 0 (speaker amp off), and the amp never comes back.
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* Also try the generic PCI "power_save" disable for HDA paths. */
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{
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char pm_path[128];
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snprintf(pm_path, sizeof(pm_path),
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"/sys/class/sound/card%d/device/power/control", card_idx);
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FILE *pm = fopen(pm_path, "w");
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if (pm) {
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fputs("on", pm);
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fclose(pm);
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fprintf(stderr, "[audio] Disabled runtime-PM: %s\n", pm_path);
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} else {
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fprintf(stderr, "[audio] Could not set runtime-PM: %s\n", pm_path);
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}
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/* Also try the autosuspend delay — set to -1 (never) */
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snprintf(pm_path, sizeof(pm_path),
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"/sys/class/sound/card%d/device/power/autosuspend_delay_ms",
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card_idx);
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pm = fopen(pm_path, "w");
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if (pm) {
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fputs("-1", pm);
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fclose(pm);
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fprintf(stderr, "[audio] Set autosuspend_delay=-1: %s\n", pm_path);
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}
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}
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fprintf(stderr, "[audio] Ready\n");
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return audio;
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}