sound/core/pcm.c

107 			struct snd_pcm_substream *substream;
128 			for (substream = pstr->substream; substream;
129 			     substream = substream->next)
130 				if (substream->number == (int)subdevice)
132 			if (substream == NULL)
135 			return snd_pcm_info_user(substream, info);
328 static void snd_pcm_proc_info_read(struct snd_pcm_substream *substream,
334 	if (! substream)
341 	err = snd_pcm_info(substream, info);
362 	snd_pcm_proc_info_read(((struct snd_pcm_str *)entry->private_data)->substream,
375 	struct snd_pcm_substream *substream = entry->private_data;
378 	guard(mutex)(&substream->pcm->open_mutex);
379 	runtime = substream->runtime;
396 	if (substream->oss.oss) {
410 	struct snd_pcm_substream *substream = entry->private_data;
413 	guard(mutex)(&substream->pcm->open_mutex);
414 	runtime = substream->runtime;
436 	struct snd_pcm_substream *substream = entry->private_data;
441 	guard(mutex)(&substream->pcm->open_mutex);
442 	runtime = substream->runtime;
448 	err = snd_pcm_status64(substream, &status);
454 	snd_iprintf(buffer, "owner_pid   : %d\n", pid_vnr(substream->pid));
471 	struct snd_pcm_substream *substream = entry->private_data;
473 	snd_pcm_stop_xrun(substream);
530 create_substream_info_entry(struct snd_pcm_substream *substream,
537 	entry = snd_info_create_card_entry(substream->pcm->card, name,
538 					   substream->proc_root);
540 		snd_info_set_text_ops(entry, substream, read);
544 static int snd_pcm_substream_proc_init(struct snd_pcm_substream *substream)
550 	card = substream->pcm->card;
552 	sprintf(name, "sub%i", substream->number);
554 					   substream->pstr->proc_root);
558 	substream->proc_root = entry;
560 	create_substream_info_entry(substream, "info",
562 	create_substream_info_entry(substream, "hw_params",
564 	create_substream_info_entry(substream, "sw_params",
566 	create_substream_info_entry(substream, "status",
570 	entry = create_substream_info_entry(substream, "xrun_injection", NULL);
583 static inline int snd_pcm_substream_proc_init(struct snd_pcm_substream *substream) { return 0; }
630 	struct snd_pcm_substream *substream, *prev;
659 		substream = kzalloc(sizeof(*substream), GFP_KERNEL);
660 		if (!substream)
662 		substream->pcm = pcm;
663 		substream->pstr = pstr;
664 		substream->number = idx;
665 		substream->stream = stream;
666 		sprintf(substream->name, "subdevice #%i", idx);
667 		substream->buffer_bytes_max = UINT_MAX;
669 			pstr->substream = substream;
671 			prev->next = substream;
674 			err = snd_pcm_substream_proc_init(substream);
679 					pstr->substream = NULL;
682 				kfree(substream);
686 		substream->group = &substream->self_group;
687 		snd_pcm_group_init(&substream->self_group);
688 		list_add_tail(&substream->link_list, &substream->self_group.substreams);
689 		atomic_set(&substream->mmap_count, 0);
690 		prev = substream;
786  * by userspace. It provides existing ASoC components drivers with a substream
815 	struct snd_pcm_substream *substream, *substream_next;
823 	substream = pstr->substream;
824 	while (substream) {
825 		substream_next = substream->next;
826 		snd_pcm_timer_done(substream);
827 		kfree(substream);
828 		substream = substream_next;
879 	struct snd_pcm_substream *substream;
892 	if (pstr->substream == NULL || pstr->substream_count == 0)
901 		for (substream = pcm->streams[opposite].substream; substream;
902 		     substream = substream->next) {
903 			if (SUBSTREAM_BUSY(substream))
912 			substream = pstr->substream;
914 			for (substream = pstr->substream; substream;
915 			     substream = substream->next)
916 				if (substream->number == prefer_subdevice)
919 		if (! substream)
921 		if (! SUBSTREAM_BUSY(substream))
923 		substream->ref_count++;
924 		*rsubstream = substream;
928 	for (substream = pstr->substream; substream; substream = substream->next) {
929 		if (!SUBSTREAM_BUSY(substream) &&
931 		     substream->number == prefer_subdevice))
934 	if (substream == NULL)
966 	substream->runtime = runtime;
967 	substream->private_data = pcm->private_data;
968 	substream->ref_count = 1;
969 	substream->f_flags = file->f_flags;
970 	substream->pid = get_pid(task_pid(current));
972 	*rsubstream = substream;
976 void snd_pcm_detach_substream(struct snd_pcm_substream *substream)
980 	if (PCM_RUNTIME_CHECK(substream))
982 	runtime = substream->runtime;
991 	if (substream->timer) {
992 		scoped_guard(spinlock_irq, &substream->timer->lock)
993 			substream->runtime = NULL;
995 		substream->runtime = NULL;
1000 	put_pid(substream->pid);
1001 	substream->pid = NULL;
1002 	substream->pstr->substream_opened--;
1043 	struct snd_pcm_substream *substream;
1056 		if (pcm->streams[cidx].substream == NULL)
1075 		for (substream = pcm->streams[cidx].substream; substream; substream = substream->next)
1076 			snd_pcm_timer_init(substream);
1086 	struct snd_pcm_substream *substream;
1094 	for_each_pcm_substream(pcm, cidx, substream) {
1095 		snd_pcm_stream_lock_irq(substream);
1096 		if (substream->runtime) {
1097 			if (snd_pcm_running(substream))
1098 				snd_pcm_stop(substream, SNDRV_PCM_STATE_DISCONNECTED);
1100 			__snd_pcm_set_state(substream->runtime,
1102 			wake_up(&substream->runtime->sleep);
1103 			wake_up(&substream->runtime->tsleep);
1105 		snd_pcm_stream_unlock_irq(substream);
1108 	for_each_pcm_substream(pcm, cidx, substream)
1109 		snd_pcm_sync_stop(substream, false);
1170 		if (pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream)
1173 		if (pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream)