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| author | Takashi Iwai <tiwai@suse.de> | 2019-11-17 09:53:07 +0100 |
|---|---|---|
| committer | Takashi Iwai <tiwai@suse.de> | 2019-11-20 19:39:54 +0100 |
| commit | fabb26dcd104027b971c018275fe40f2ebe09ae3 (patch) | |
| tree | f6428eb1cdc7dbfa009e7d0bb684b0407b491307 /sound/core | |
| parent | ALSA: pcm: Add the support for sync-stop operation (diff) | |
| download | linux-fabb26dcd104027b971c018275fe40f2ebe09ae3.tar.xz linux-fabb26dcd104027b971c018275fe40f2ebe09ae3.zip | |
ALSA: pcm: Add card sync_irq field
Many PCI and other drivers performs snd_pcm_period_elapsed() simply in
its interrupt handler, so the sync_stop operation is just to call
synchronize_irq(). Instead of putting this call multiple times,
introduce the common card->sync_irq field. When this field is set,
PCM core performs synchronize_irq() for sync-stop operation. Each
driver just needs to copy its local IRQ number to card->sync_irq, and
that's all we need.
Link: https://lore.kernel.org/r/20191117085308.23915-8-tiwai@suse.de
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'sound/core')
| -rw-r--r-- | sound/core/init.c | 1 | ||||
| -rw-r--r-- | sound/core/pcm_native.c | 2 |
2 files changed, 3 insertions, 0 deletions
diff --git a/sound/core/init.c b/sound/core/init.c index db99b7fad6ad..faa9f03c01ca 100644 --- a/sound/core/init.c +++ b/sound/core/init.c @@ -215,6 +215,7 @@ int snd_card_new(struct device *parent, int idx, const char *xid, init_waitqueue_head(&card->power_sleep); #endif init_waitqueue_head(&card->remove_sleep); + card->sync_irq = -1; device_initialize(&card->card_dev); card->card_dev.parent = parent; diff --git a/sound/core/pcm_native.c b/sound/core/pcm_native.c index 163d621ff238..1fe581167b7b 100644 --- a/sound/core/pcm_native.c +++ b/sound/core/pcm_native.c @@ -574,6 +574,8 @@ static void snd_pcm_sync_stop(struct snd_pcm_substream *substream) substream->runtime->stop_operating = false; if (substream->ops->sync_stop) substream->ops->sync_stop(substream); + else if (substream->pcm->card->sync_irq > 0) + synchronize_irq(substream->pcm->card->sync_irq); } } |