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From: Takashi Iwai <tiwai@suse.de>
To: alsa-devel@alsa-project.org
Subject: [alsa-devel] [PATCH 7/8] ALSA: pcm: Add card sync_irq field
Date: Sun, 17 Nov 2019 09:53:07 +0100
Message-ID: <20191117085308.23915-8-tiwai@suse.de> (raw)
In-Reply-To: <20191117085308.23915-1-tiwai@suse.de>

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.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
---
 include/sound/core.h    | 1 +
 sound/core/init.c       | 1 +
 sound/core/pcm_native.c | 2 ++
 3 files changed, 4 insertions(+)

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
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);
 	}
 }
 
-- 
2.16.4

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  parent reply index

Thread overview: 38+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-11-17  8:53 [alsa-devel] [PATCH 0/8] ALSA: pcm: API cleanups and extensions Takashi Iwai
2019-11-17  8:53 ` [alsa-devel] [PATCH 1/8] ALSA: pcm: Introduce managed buffer allocation mode Takashi Iwai
2019-11-18 16:24   ` Pierre-Louis Bossart
2019-11-18 18:46     ` Takashi Iwai
2019-11-17  8:53 ` [alsa-devel] [PATCH 2/8] ALSA: docs: Update for " Takashi Iwai
2019-11-17  8:53 ` [alsa-devel] [PATCH 3/8] ALSA: pcm: Allow NULL ioctl ops Takashi Iwai
2019-11-17  8:53 ` [alsa-devel] [PATCH 4/8] ALSA: docs: Update document about the default PCM " Takashi Iwai
2019-11-17  8:53 ` [alsa-devel] [PATCH 5/8] ALSA: pcm: Move PCM_RUNTIME_CHECK() macro into local header Takashi Iwai
2019-11-17  9:42   ` kbuild test robot
2019-11-17 10:05     ` Takashi Iwai
2019-11-17 10:28   ` kbuild test robot
2019-11-17  8:53 ` [alsa-devel] [PATCH 6/8] ALSA: pcm: Add the support for sync-stop operation Takashi Iwai
2019-11-18 16:33   ` Pierre-Louis Bossart
2019-11-18 18:47     ` Takashi Iwai
2019-11-17  8:53 ` Takashi Iwai [this message]
2019-11-18 16:38   ` [alsa-devel] [PATCH 7/8] ALSA: pcm: Add card sync_irq field Pierre-Louis Bossart
2019-11-18 18:52     ` Takashi Iwai
2019-11-18 19:20       ` Sridharan, Ranjani
2019-11-18 19:49         ` Takashi Iwai
2019-11-18 19:55           ` Sridharan, Ranjani
2019-11-18 20:40             ` Takashi Iwai
2019-11-18 23:47               ` Ranjani Sridharan
2019-11-19  6:44                 ` Takashi Iwai
2019-11-19  7:40                   ` Ranjani Sridharan
2019-11-19  8:24                     ` Takashi Iwai
2019-11-19  9:39                       ` Takashi Iwai
2019-11-19 16:36                       ` Ranjani Sridharan
2019-11-19 21:27                         ` Takashi Iwai
2019-11-19 21:43                           ` Sridharan, Ranjani
2019-11-21 19:22                             ` Sridharan, Ranjani
2019-11-21 20:34                               ` Takashi Iwai
2019-11-21 20:46                                 ` Sridharan, Ranjani
2019-11-21 21:13                                   ` Takashi Iwai
2019-11-21 21:17                                     ` Sridharan, Ranjani
2019-11-21 21:28                                       ` Takashi Iwai
2019-11-21 21:45                                         ` Sridharan, Ranjani
2019-11-22  4:08                                     ` Jie, Yang
2019-11-17  8:53 ` [alsa-devel] [PATCH 8/8] ALSA: docs: Update about the new PCM sync_stop ops Takashi Iwai

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