105 	struct snd_pcm_substream *substream;  member
151 	int device = dpcm->substream->pstr->pcm->device;  in get_setup()
153 	if (dpcm->substream->stream == SNDRV_PCM_STREAM_PLAYBACK)  in get_setup()
155 	return &dpcm->loopback->setup[dpcm->substream->number][device];  in get_setup()
211 							substream->runtime;  in loopback_check_format()
213 							substream->runtime;  in loopback_check_format()
223 					substream, SNDRV_PCM_STATE_DRAINING);  in loopback_check_format()
226 							substream->runtime;  in loopback_check_format()
255 static int loopback_trigger(struct snd_pcm_substream *substream, int cmd)  in loopback_trigger()  argument
257 	struct snd_pcm_runtime *runtime = substream->runtime;  in loopback_trigger()
260 	int err, stream = 1 << substream->stream;  in loopback_trigger()
264 		err = loopback_check_format(cable, substream->stream);  in loopback_trigger()
275 		if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)  in loopback_trigger()
284 		if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)  in loopback_trigger()
313 	if (dpcm == NULL || dpcm->substream == NULL)  in params_change_substream()
315 	dst_runtime = dpcm->substream->runtime;  in params_change_substream()
321 static void params_change(struct snd_pcm_substream *substream)  in params_change()  argument
323 	struct snd_pcm_runtime *runtime = substream->runtime;  in params_change()
338 static int loopback_prepare(struct snd_pcm_substream *substream)  in loopback_prepare()  argument
340 	struct snd_pcm_runtime *runtime = substream->runtime;  in loopback_prepare()
353 	if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) {  in loopback_prepare()
367 	if (!(cable->valid & ~(1 << substream->stream)) ||  in loopback_prepare()
369 	     substream->stream == SNDRV_PCM_STREAM_PLAYBACK))  in loopback_prepare()
370 		params_change(substream);  in loopback_prepare()
371 	cable->valid |= 1 << substream->stream;  in loopback_prepare()
379 	struct snd_pcm_runtime *runtime = dpcm->substream->runtime;  in clear_capture_buf()
407 	struct snd_pcm_runtime *runtime = play->substream->runtime;  in copy_play_buf()
409 	char *dst = capt->substream->runtime->dma_area;  in copy_play_buf()
538 	if (loopback_pos_update(dpcm->cable) & (1 << dpcm->substream->stream)) {  in loopback_timer_function()
544 			snd_pcm_period_elapsed(dpcm->substream);  in loopback_timer_function()
551 static snd_pcm_uframes_t loopback_pointer(struct snd_pcm_substream *substream)  in loopback_pointer()  argument
553 	struct snd_pcm_runtime *runtime = substream->runtime;  in loopback_pointer()
593 static int loopback_hw_params(struct snd_pcm_substream *substream,  in loopback_hw_params()  argument
596 	return snd_pcm_lib_alloc_vmalloc_buffer(substream,  in loopback_hw_params()
600 static int loopback_hw_free(struct snd_pcm_substream *substream)  in loopback_hw_free()  argument
602 	struct snd_pcm_runtime *runtime = substream->runtime;  in loopback_hw_free()
607 	cable->valid &= ~(1 << substream->stream);  in loopback_hw_free()
609 	return snd_pcm_lib_free_vmalloc_buffer(substream);  in loopback_hw_free()
612 static unsigned int get_cable_index(struct snd_pcm_substream *substream)  in get_cable_index()  argument
614 	if (!substream->pcm->device)  in get_cable_index()
615 		return substream->stream;  in get_cable_index()
617 		return !substream->stream;  in get_cable_index()
661 static int loopback_open(struct snd_pcm_substream *substream)  in loopback_open()  argument
663 	struct snd_pcm_runtime *runtime = substream->runtime;  in loopback_open()
664 	struct loopback *loopback = substream->private_data;  in loopback_open()
668 	int dev = get_cable_index(substream);  in loopback_open()
677 	dpcm->substream = substream;  in loopback_open()
681 	cable = loopback->cables[substream->number][dev];  in loopback_open()
691 		loopback->cables[substream->number][dev] = cable;  in loopback_open()
694 	cable->streams[substream->stream] = dpcm;  in loopback_open()
731 static int loopback_close(struct snd_pcm_substream *substream)  in loopback_close()  argument
733 	struct loopback *loopback = substream->private_data;  in loopback_close()
734 	struct loopback_pcm *dpcm = substream->runtime->private_data;  in loopback_close()
736 	int dev = get_cable_index(substream);  in loopback_close()
740 	cable = loopback->cables[substream->number][dev];  in loopback_close()
741 	if (cable->streams[!substream->stream]) {  in loopback_close()
743 		cable->streams[substream->stream] = NULL;  in loopback_close()
746 		loopback->cables[substream->number][dev] = NULL;  in loopback_close()