From dc5eafe7787c6c4ffab6c6b8a5f78859a249880e Mon Sep 17 00:00:00 2001
From: Takashi Iwai <tiwai@suse.de>
Date: Tue, 10 Dec 2019 07:34:54 +0100
Subject: [PATCH] ALSA: usb-audio: Support PCM sync_stop
Git-commit: dc5eafe7787c6c4ffab6c6b8a5f78859a249880e
Patch-mainline: v5.6-rc1
References: bsc#1178203
USB-audio driver had some implementation of its own sync-stop
mechanism. This patch moved a part of it to the common PCM sync_stop
ops.
Link: https://lore.kernel.org/r/20191210063454.31603-56-tiwai@suse.de
Signed-off-by: Takashi Iwai <tiwai@suse.de>
---
sound/usb/pcm.c | 41 +++++++++++++++++++++++++++--------------
1 file changed, 27 insertions(+), 14 deletions(-)
--- a/sound/usb/pcm.c
+++ b/sound/usb/pcm.c
@@ -260,18 +260,31 @@ static int start_endpoints(struct snd_us
return 0;
}
-static void stop_endpoints(struct snd_usb_substream *subs, bool wait)
+static void sync_pending_stops(struct snd_usb_substream *subs)
+{
+ snd_usb_endpoint_sync_pending_stop(subs->sync_endpoint);
+ snd_usb_endpoint_sync_pending_stop(subs->data_endpoint);
+}
+
+static void stop_endpoints(struct snd_usb_substream *subs)
{
if (test_and_clear_bit(SUBSTREAM_FLAG_SYNC_EP_STARTED, &subs->flags))
snd_usb_endpoint_stop(subs->sync_endpoint);
if (test_and_clear_bit(SUBSTREAM_FLAG_DATA_EP_STARTED, &subs->flags))
snd_usb_endpoint_stop(subs->data_endpoint);
+}
- if (wait) {
- snd_usb_endpoint_sync_pending_stop(subs->sync_endpoint);
- snd_usb_endpoint_sync_pending_stop(subs->data_endpoint);
+/* PCM sync_stop callback */
+static int snd_usb_pcm_sync_stop(struct snd_pcm_substream *substream)
+{
+ struct snd_usb_substream *subs = substream->runtime->private_data;
+
+ if (!snd_usb_lock_shutdown(subs->stream->chip)) {
+ sync_pending_stops(subs);
+ snd_usb_unlock_shutdown(subs->stream->chip);
}
+ return 0;
}
static int search_roland_implicit_fb(struct usb_device *dev, int ifnum,
@@ -700,7 +713,8 @@ static int configure_endpoint(struct snd
int ret;
/* format changed */
- stop_endpoints(subs, true);
+ stop_endpoints(subs);
+ sync_pending_stops(subs);
ret = snd_usb_endpoint_set_params(subs->data_endpoint,
subs->pcm_format,
subs->channels,
@@ -845,7 +859,8 @@ static int snd_usb_hw_free(struct snd_pc
subs->cur_rate = 0;
subs->period_bytes = 0;
if (!snd_usb_lock_shutdown(subs->stream->chip)) {
- stop_endpoints(subs, true);
+ stop_endpoints(subs);
+ sync_pending_stops(subs);
snd_usb_endpoint_deactivate(subs->sync_endpoint);
snd_usb_endpoint_deactivate(subs->data_endpoint);
snd_usb_unlock_shutdown(subs->stream->chip);
@@ -880,9 +895,6 @@ static int snd_usb_pcm_prepare(struct sn
goto unlock;
}
- snd_usb_endpoint_sync_pending_stop(subs->sync_endpoint);
- snd_usb_endpoint_sync_pending_stop(subs->data_endpoint);
-
ret = snd_usb_pcm_change_state(subs, UAC3_PD_STATE_D0);
if (ret < 0)
goto unlock;
@@ -1340,7 +1352,6 @@ static int snd_usb_pcm_close(struct snd_
struct snd_usb_substream *subs = &as->substream[direction];
int ret;
- stop_endpoints(subs, true);
snd_media_stop_pipeline(subs);
if (!as->chip->keep_iface &&
@@ -1717,7 +1728,7 @@ static int snd_usb_substream_playback_tr
subs->running = 1;
return 0;
case SNDRV_PCM_TRIGGER_STOP:
- stop_endpoints(subs, false);
+ stop_endpoints(subs);
subs->running = 0;
return 0;
case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
@@ -1728,7 +1739,7 @@ static int snd_usb_substream_playback_tr
return 0;
case SNDRV_PCM_TRIGGER_SUSPEND:
if (subs->stream->chip->setup_fmt_after_resume_quirk) {
- stop_endpoints(subs, true);
+ stop_endpoints(subs);
subs->need_setup_fmt = true;
return 0;
}
@@ -1754,7 +1765,7 @@ static int snd_usb_substream_capture_tri
subs->running = 1;
return 0;
case SNDRV_PCM_TRIGGER_STOP:
- stop_endpoints(subs, false);
+ stop_endpoints(subs);
subs->running = 0;
return 0;
case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
@@ -1767,7 +1778,7 @@ static int snd_usb_substream_capture_tri
return 0;
case SNDRV_PCM_TRIGGER_SUSPEND:
if (subs->stream->chip->setup_fmt_after_resume_quirk) {
- stop_endpoints(subs, true);
+ stop_endpoints(subs);
subs->need_setup_fmt = true;
return 0;
}
@@ -1785,6 +1796,7 @@ static const struct snd_pcm_ops snd_usb_
.hw_free = snd_usb_hw_free,
.prepare = snd_usb_pcm_prepare,
.trigger = snd_usb_substream_playback_trigger,
+ .sync_stop = snd_usb_pcm_sync_stop,
.pointer = snd_usb_pcm_pointer,
};
@@ -1796,6 +1808,7 @@ static const struct snd_pcm_ops snd_usb_
.hw_free = snd_usb_hw_free,
.prepare = snd_usb_pcm_prepare,
.trigger = snd_usb_substream_capture_trigger,
+ .sync_stop = snd_usb_pcm_sync_stop,
.pointer = snd_usb_pcm_pointer,
};