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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 /include/sound | |
| parent | ALSA: pcm: Add the support for sync-stop operation (diff) | |
| download | linux-dev-fabb26dcd104027b971c018275fe40f2ebe09ae3.tar.xz linux-dev-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 'include/sound')
| -rw-r--r-- | include/sound/core.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/include/sound/core.h b/include/sound/core.h index ee238f100f73..af3dce956c17 100644 --- a/include/sound/core.h +++ b/include/sound/core.h @@ -117,6 +117,7 @@ struct snd_card { struct device card_dev; /* cardX object for sysfs */ const struct attribute_group *dev_groups[4]; /* assigned sysfs attr */ bool registered; /* card_dev is registered? */ + int sync_irq; /* assigned irq, used for PCM sync */ wait_queue_head_t remove_sleep; #ifdef CONFIG_PM |