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ALSA: nm256: Support PCM sync_stop 

The driver invokes snd_pcm_period_elapsed() simply from the interrupt
handler.  Set card->sync_irq for enabling the missing sync_stop PCM
operation.  It's cleared and reset dynamically at IRQ re-acquiring for
the PM resume, too.

Link: https://lore.kernel.org/r/20191210063454.31603-29-tiwai@suse.de
Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Takashi Iwai 2019-12-10 07:34:27 +01:00
parent a20b8bfe55
commit 1478eb6365
1 changed files with 2 additions and 0 deletions
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2
sound/pci/nm256/nm256.c
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@ -460,6 +460,7 @@ static int snd_nm256_acquire_irq(struct nm256 *chip)
return -EBUSY;
}
chip->irq = chip->pci->irq;
chip->card->sync_irq = chip->irq;
}
chip->irq_acks++;
mutex_unlock(&chip->irq_mutex);
@ -475,6 +476,7 @@ static void snd_nm256_release_irq(struct nm256 *chip)
if (chip->irq_acks == 0 && chip->irq >= 0) {
free_irq(chip->irq, chip);
chip->irq = -1;
chip->card->sync_irq = -1;
}
mutex_unlock(&chip->irq_mutex);
}