44 struct channel {  struct
161 static struct channel *get_channel(struct most_interface *iface,  in get_channel()
165 	struct channel *channel;  in get_channel()  local
167 	list_for_each_entry(channel, &adpt->dev_list, list) {  in get_channel()
168 		if ((channel->iface == iface) && (channel->id == channel_id))  in get_channel()
169 			return channel;  in get_channel()
181 static bool copy_data(struct channel *channel, struct mbo *mbo)  in copy_data()  argument
183 	struct snd_pcm_runtime *const runtime = channel->substream->runtime;  in copy_data()
184 	unsigned int const frame_bytes = channel->cfg->subbuffer_size;  in copy_data()
189 	if (channel->cfg->direction & MOST_CH_RX)  in copy_data()
193 	fr0 = min(buffer_size - channel->buffer_pos, frames);  in copy_data()
195 	channel->copy_fn(runtime->dma_area + channel->buffer_pos * frame_bytes,  in copy_data()
201 		channel->copy_fn(runtime->dma_area,  in copy_data()
206 	channel->buffer_pos += frames;  in copy_data()
207 	if (channel->buffer_pos >= buffer_size)  in copy_data()
208 		channel->buffer_pos -= buffer_size;  in copy_data()
209 	channel->period_pos += frames;  in copy_data()
210 	if (channel->period_pos >= runtime->period_size) {  in copy_data()
211 		channel->period_pos -= runtime->period_size;  in copy_data()
229 	struct channel *const channel = data;  in playback_thread()  local
236 			channel->playback_waitq,  in playback_thread()
238 			(channel->is_stream_running &&  in playback_thread()
239 			 (mbo = most_get_mbo(channel->iface, channel->id,  in playback_thread()
244 		if (channel->is_stream_running)  in playback_thread()
245 			period_elapsed = copy_data(channel, mbo);  in playback_thread()
251 			snd_pcm_period_elapsed(channel->substream);  in playback_thread()
267 	struct channel *channel = substream->private_data;  in pcm_open()  local
269 	struct most_channel_config *cfg = channel->cfg;  in pcm_open()
272 	channel->substream = substream;  in pcm_open()
275 		channel->playback_task = kthread_run(playback_thread, channel,  in pcm_open()
277 		if (IS_ERR(channel->playback_task)) {  in pcm_open()
279 			return PTR_ERR(channel->playback_task);  in pcm_open()
283 	ret = most_start_channel(channel->iface, channel->id, &comp);  in pcm_open()
287 			kthread_stop(channel->playback_task);  in pcm_open()
291 	runtime->hw = channel->pcm_hardware;  in pcm_open()
307 	struct channel *channel = substream->private_data;  in pcm_close()  local
309 	if (channel->cfg->direction == MOST_CH_TX)  in pcm_close()
310 		kthread_stop(channel->playback_task);  in pcm_close()
311 	most_stop_channel(channel->iface, channel->id, &comp);  in pcm_close()
326 	struct channel *channel = substream->private_data;  in pcm_prepare()  local
328 	struct most_channel_config *cfg = channel->cfg;  in pcm_prepare()
331 	channel->copy_fn = NULL;  in pcm_prepare()
335 			channel->copy_fn = alsa_to_most_memcpy;  in pcm_prepare()
337 			channel->copy_fn = alsa_to_most_copy16;  in pcm_prepare()
339 			channel->copy_fn = alsa_to_most_copy24;  in pcm_prepare()
341 			channel->copy_fn = alsa_to_most_copy32;  in pcm_prepare()
344 			channel->copy_fn = most_to_alsa_memcpy;  in pcm_prepare()
346 			channel->copy_fn = most_to_alsa_copy16;  in pcm_prepare()
348 			channel->copy_fn = most_to_alsa_copy24;  in pcm_prepare()
350 			channel->copy_fn = most_to_alsa_copy32;  in pcm_prepare()
353 	if (!channel->copy_fn)  in pcm_prepare()
355 	channel->period_pos = 0;  in pcm_prepare()
356 	channel->buffer_pos = 0;  in pcm_prepare()
372 	struct channel *channel = substream->private_data;  in pcm_trigger()  local
376 		channel->is_stream_running = true;  in pcm_trigger()
377 		wake_up_interruptible(&channel->playback_waitq);  in pcm_trigger()
381 		channel->is_stream_running = false;  in pcm_trigger()
400 	struct channel *channel = substream->private_data;  in pcm_pointer()  local
402 	return channel->buffer_pos;  in pcm_pointer()
489 	struct channel *channel, *tmp;  in release_adapter()  local
491 	list_for_each_entry_safe(channel, tmp, &adpt->dev_list, list) {  in release_adapter()
492 		list_del(&channel->list);  in release_adapter()
493 		kfree(channel);  in release_adapter()
517 	struct channel *channel;  in audio_probe_channel()  local
554 			   sizeof(*channel), &adpt->card);  in audio_probe_channel()
577 	channel = kzalloc(sizeof(*channel), GFP_KERNEL);  in audio_probe_channel()
578 	if (!channel) {  in audio_probe_channel()
582 	channel->card = adpt->card;  in audio_probe_channel()
583 	channel->cfg = cfg;  in audio_probe_channel()
584 	channel->iface = iface;  in audio_probe_channel()
585 	channel->id = channel_id;  in audio_probe_channel()
586 	init_waitqueue_head(&channel->playback_waitq);  in audio_probe_channel()
587 	list_add_tail(&channel->list, &adpt->dev_list);  in audio_probe_channel()
589 	ret = audio_set_hw_params(&channel->pcm_hardware, ch_num, sample_res,  in audio_probe_channel()
600 	pcm->private_data = channel;  in audio_probe_channel()
643 	struct channel *channel;  in audio_disconnect_channel()  local
646 	channel = get_channel(iface, channel_id);  in audio_disconnect_channel()
647 	if (!channel)  in audio_disconnect_channel()
650 	list_del(&channel->list);  in audio_disconnect_channel()
652 	kfree(channel);  in audio_disconnect_channel()
669 	struct channel *channel = get_channel(mbo->ifp, mbo->hdm_channel_id);  in audio_rx_completion()  local
672 	if (!channel)  in audio_rx_completion()
674 	if (channel->is_stream_running)  in audio_rx_completion()
675 		period_elapsed = copy_data(channel, mbo);  in audio_rx_completion()
678 		snd_pcm_period_elapsed(channel->substream);  in audio_rx_completion()
695 	struct channel *channel = get_channel(iface, channel_id);  in audio_tx_completion()  local
697 	if (!channel)  in audio_tx_completion()
700 	wake_up_interruptible(&channel->playback_waitq);  in audio_tx_completion()