iv/linux
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

ALSA: usb-audio: Support PCM sync_stop

Browse Source 
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>
This commit is contained in:
Takashi Iwai 2019-12-10 07:34:54 +01:00
parent 0ca4cefad1
commit dc5eafe778
1 changed files with 25 additions and 12 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

37
sound/usb/pcm.c
View File

@ -260,18 +260,31 @@ static int start_endpoints(struct snd_usb_substream *subs)
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,
@ -697,7 +710,8 @@ static int configure_endpoint(struct snd_usb_substream *subs)
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,
@ -842,7 +856,8 @@ static int snd_usb_hw_free(struct snd_pcm_substream *substream)
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);
@ -877,9 +892,6 @@ static int snd_usb_pcm_prepare(struct snd_pcm_substream *substream)
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;
@ -1337,7 +1349,6 @@ static int snd_usb_pcm_close(struct snd_pcm_substream *substream)
struct snd_usb_substream *subs = &as->substream[direction];
int ret;
stop_endpoints(subs, true);
snd_media_stop_pipeline(subs);
if (!as->chip->keep_iface &&
@ -1714,7 +1725,7 @@ static int snd_usb_substream_playback_trigger(struct snd_pcm_substream *substrea
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:
@ -1744,7 +1755,7 @@ static int snd_usb_substream_capture_trigger(struct snd_pcm_substream *substream
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:
@ -1767,6 +1778,7 @@ static const struct snd_pcm_ops snd_usb_playback_ops = {
.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,
};
@ -1777,6 +1789,7 @@ static const struct snd_pcm_ops snd_usb_capture_ops = {
.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,
};