pcm.c

  1// SPDX-License-Identifier: (GPL-2.0-only OR BSD-3-Clause)
  2//
  3// This file is provided under a dual BSD/GPLv2 license.  When using or
  4// redistributing this file, you may do so under either license.
  5//
  6// Copyright(c) 2018 Intel Corporation
  7//
  8// Author: Liam Girdwood <liam.r.girdwood@linux.intel.com>
  9//
 10// PCM Layer, interface between ALSA and IPC.
 11//
 12
 13#include <linux/pm_runtime.h>
 14#include <sound/pcm_params.h>
 15#include <sound/sof.h>
 16#include <trace/events/sof.h>
 17#include "sof-of-dev.h"
 18#include "sof-priv.h"
 19#include "sof-audio.h"
 20#include "sof-utils.h"
 21#include "ops.h"
 22
 23/*
 24 * sof pcm period elapse work
 25 */
 26static void snd_sof_pcm_period_elapsed_work(struct work_struct *work)
 27{
 28	struct snd_sof_pcm_stream *sps =
 29		container_of(work, struct snd_sof_pcm_stream,
 30			     period_elapsed_work);
 31
 32	snd_pcm_period_elapsed(sps->substream);
 33}
 34
 35void snd_sof_pcm_init_elapsed_work(struct work_struct *work)
 36{
 37	 INIT_WORK(work, snd_sof_pcm_period_elapsed_work);
 38}
 39
 40/*
 41 * sof pcm period elapse, this could be called at irq thread context.
 42 */
 43void snd_sof_pcm_period_elapsed(struct snd_pcm_substream *substream)
 44{
 45	struct snd_soc_pcm_runtime *rtd = snd_soc_substream_to_rtd(substream);
 46	struct snd_soc_component *component =
 47		snd_soc_rtdcom_lookup(rtd, SOF_AUDIO_PCM_DRV_NAME);
 48	struct snd_sof_pcm *spcm;
 49
 50	spcm = snd_sof_find_spcm_dai(component, rtd);
 51	if (!spcm) {
 52		dev_err(component->dev,
 53			"error: period elapsed for unknown stream!\n");
 54		return;
 55	}
 56
 57	/*
 58	 * snd_pcm_period_elapsed() can be called in interrupt context
 59	 * before IRQ_HANDLED is returned. Inside snd_pcm_period_elapsed(),
 60	 * when the PCM is done draining or xrun happened, a STOP IPC will
 61	 * then be sent and this IPC will hit IPC timeout.
 62	 * To avoid sending IPC before the previous IPC is handled, we
 63	 * schedule delayed work here to call the snd_pcm_period_elapsed().
 64	 */
 65	schedule_work(&spcm->stream[substream->stream].period_elapsed_work);
 66}
 67EXPORT_SYMBOL(snd_sof_pcm_period_elapsed);
 68
 69static int
 70sof_pcm_setup_connected_widgets(struct snd_sof_dev *sdev, struct snd_soc_pcm_runtime *rtd,
 71				struct snd_sof_pcm *spcm, struct snd_pcm_hw_params *params,
 72				struct snd_sof_platform_stream_params *platform_params, int dir)
 73{
 74	struct snd_soc_dai *dai;
 75	int ret, j;
 76
 77	/* query DAPM for list of connected widgets and set them up */
 78	for_each_rtd_cpu_dais(rtd, j, dai) {
 79		struct snd_soc_dapm_widget_list *list;
 80
 81		ret = snd_soc_dapm_dai_get_connected_widgets(dai, dir, &list,
 82							     dpcm_end_walk_at_be);
 83		if (ret < 0) {
 84			spcm_err(spcm, dir, "dai %s has no valid %s path\n",
 85				 dai->name, snd_pcm_direction_name(dir));
 86			return ret;
 87		}
 88
 89		spcm->stream[dir].list = list;
 90
 91		ret = sof_widget_list_setup(sdev, spcm, params, platform_params, dir);
 92		if (ret < 0) {
 93			spcm_err(spcm, dir, "Widget list set up failed\n");
 94			spcm->stream[dir].list = NULL;
 95			snd_soc_dapm_dai_free_widgets(&list);
 96			return ret;
 97		}
 98	}
 99
100	return 0;
101}
102
103static int sof_pcm_hw_params(struct snd_soc_component *component,
104			     struct snd_pcm_substream *substream,
105			     struct snd_pcm_hw_params *params)
106{
107	struct snd_sof_dev *sdev = snd_soc_component_get_drvdata(component);
108	struct snd_soc_pcm_runtime *rtd = snd_soc_substream_to_rtd(substream);
109	const struct sof_ipc_pcm_ops *pcm_ops = sof_ipc_get_ops(sdev, pcm);
110	struct snd_sof_platform_stream_params platform_params = { 0 };
111	struct snd_pcm_runtime *runtime = substream->runtime;
112	struct snd_sof_pcm *spcm;
113	int ret;
114
115	/* nothing to do for BE */
116	if (rtd->dai_link->no_pcm)
117		return 0;
118
119	spcm = snd_sof_find_spcm_dai(component, rtd);
120	if (!spcm)
121		return -EINVAL;
122
123	spcm_dbg(spcm, substream->stream, "Entry: hw_params\n");
124
125	/*
126	 * Handle repeated calls to hw_params() without free_pcm() in
127	 * between. At least ALSA OSS emulation depends on this.
128	 */
129	if (spcm->prepared[substream->stream] && pcm_ops && pcm_ops->hw_free) {
130		ret = pcm_ops->hw_free(component, substream);
131		if (ret < 0)
132			return ret;
133
134		spcm->prepared[substream->stream] = false;
135	}
136
137	ret = snd_sof_pcm_platform_hw_params(sdev, substream, params, &platform_params);
138	if (ret < 0) {
139		spcm_err(spcm, substream->stream, "platform hw params failed\n");
140		return ret;
141	}
142
143	/* if this is a repeated hw_params without hw_free, skip setting up widgets */
144	if (!spcm->stream[substream->stream].list) {
145		ret = sof_pcm_setup_connected_widgets(sdev, rtd, spcm, params, &platform_params,
146						      substream->stream);
147		if (ret < 0)
148			return ret;
149	}
150
151	/* create compressed page table for audio firmware */
152	if (runtime->buffer_changed) {
153		struct snd_dma_buffer *dmab = snd_pcm_get_dma_buf(substream);
154
155		ret = snd_sof_create_page_table(component->dev, dmab,
156				spcm->stream[substream->stream].page_table.area,
157				runtime->dma_bytes);
158		if (ret < 0)
159			return ret;
160	}
161
162	if (pcm_ops && pcm_ops->hw_params) {
163		ret = pcm_ops->hw_params(component, substream, params, &platform_params);
164		if (ret < 0)
165			return ret;
166	}
167
168	spcm->prepared[substream->stream] = true;
169
170	/* save pcm hw_params */
171	memcpy(&spcm->params[substream->stream], params, sizeof(*params));
172
173	return 0;
174}
175
176static int sof_pcm_stream_free(struct snd_sof_dev *sdev,
177			       struct snd_pcm_substream *substream,
178			       struct snd_sof_pcm *spcm, int dir,
179			       bool free_widget_list)
180{
181	const struct sof_ipc_pcm_ops *pcm_ops = sof_ipc_get_ops(sdev, pcm);
182	int ret;
183	int err = 0;
184
185	if (spcm->prepared[substream->stream]) {
186		/* stop DMA first if needed */
187		if (pcm_ops && pcm_ops->platform_stop_during_hw_free)
188			snd_sof_pcm_platform_trigger(sdev, substream,
189						     SNDRV_PCM_TRIGGER_STOP);
190
191		/* free PCM in the DSP */
192		if (pcm_ops && pcm_ops->hw_free) {
193			ret = pcm_ops->hw_free(sdev->component, substream);
194			if (ret < 0) {
195				spcm_err(spcm, substream->stream,
196					 "pcm_ops->hw_free failed %d\n", ret);
197				err = ret;
198			}
199		}
200
201		spcm->prepared[substream->stream] = false;
202		spcm->pending_stop[substream->stream] = false;
203	}
204
205	/* reset the DMA */
206	ret = snd_sof_pcm_platform_hw_free(sdev, substream);
207	if (ret < 0) {
208		spcm_err(spcm, substream->stream,
209			 "platform hw free failed %d\n", ret);
210		if (!err)
211			err = ret;
212	}
213
214	/* free widget list */
215	if (free_widget_list) {
216		ret = sof_widget_list_free(sdev, spcm, dir);
217		if (ret < 0) {
218			spcm_err(spcm, substream->stream,
219				 "sof_widget_list_free failed %d\n", ret);
220			if (!err)
221				err = ret;
222		}
223	}
224
225	return err;
226}
227
228int sof_pcm_free_all_streams(struct snd_sof_dev *sdev)
229{
230	struct snd_pcm_substream *substream;
231	struct snd_sof_pcm *spcm;
232	int dir, ret;
233
234	list_for_each_entry(spcm, &sdev->pcm_list, list) {
235		for_each_pcm_streams(dir) {
236			substream = spcm->stream[dir].substream;
237
238			if (!substream || !substream->runtime ||
239			    spcm->stream[dir].suspend_ignored)
240				continue;
241
242			if (spcm->stream[dir].list) {
243				ret = sof_pcm_stream_free(sdev, substream, spcm,
244							  dir, true);
245				if (ret < 0)
246					return ret;
247			}
248		}
249	}
250
251	return 0;
252}
253
254static int sof_pcm_hw_free(struct snd_soc_component *component,
255			   struct snd_pcm_substream *substream)
256{
257	struct snd_soc_pcm_runtime *rtd = snd_soc_substream_to_rtd(substream);
258	struct snd_sof_dev *sdev = snd_soc_component_get_drvdata(component);
259	struct snd_sof_pcm *spcm;
260	int ret;
261
262	/* nothing to do for BE */
263	if (rtd->dai_link->no_pcm)
264		return 0;
265
266	spcm = snd_sof_find_spcm_dai(component, rtd);
267	if (!spcm)
268		return -EINVAL;
269
270	spcm_dbg(spcm, substream->stream, "Entry: hw_free\n");
271
272	ret = sof_pcm_stream_free(sdev, substream, spcm, substream->stream, true);
273
274	cancel_work_sync(&spcm->stream[substream->stream].period_elapsed_work);
275
276	return ret;
277}
278
279static int sof_pcm_prepare(struct snd_soc_component *component,
280			   struct snd_pcm_substream *substream)
281{
282	struct snd_soc_pcm_runtime *rtd = snd_soc_substream_to_rtd(substream);
283	struct snd_sof_dev *sdev = snd_soc_component_get_drvdata(component);
284	struct snd_sof_pcm *spcm;
285	int ret;
286
287	/* nothing to do for BE */
288	if (rtd->dai_link->no_pcm)
289		return 0;
290
291	spcm = snd_sof_find_spcm_dai(component, rtd);
292	if (!spcm)
293		return -EINVAL;
294
295	spcm_dbg(spcm, substream->stream, "Entry: prepare\n");
296
297	if (spcm->prepared[substream->stream]) {
298		if (!spcm->pending_stop[substream->stream])
299			return 0;
300
301		/*
302		 * this case should be reached in case of xruns where we absolutely
303		 * want to free-up and reset all PCM/DMA resources
304		 */
305		ret = sof_pcm_stream_free(sdev, substream, spcm, substream->stream, true);
306		if (ret < 0)
307			return ret;
308	}
309
310	/* set hw_params */
311	ret = sof_pcm_hw_params(component,
312				substream, &spcm->params[substream->stream]);
313	if (ret < 0) {
314		spcm_err(spcm, substream->stream,
315			 "failed to set hw_params after resume\n");
316		return ret;
317	}
318
319	return 0;
320}
321
322/*
323 * FE dai link trigger actions are always executed in non-atomic context because
324 * they involve IPC's.
325 */
326static int sof_pcm_trigger(struct snd_soc_component *component,
327			   struct snd_pcm_substream *substream, int cmd)
328{
329	struct snd_soc_pcm_runtime *rtd = snd_soc_substream_to_rtd(substream);
330	struct snd_sof_dev *sdev = snd_soc_component_get_drvdata(component);
331	const struct sof_ipc_pcm_ops *pcm_ops = sof_ipc_get_ops(sdev, pcm);
332	struct snd_sof_pcm *spcm;
333	bool reset_hw_params = false;
334	bool ipc_first = false;
335	int ret = 0;
336
337	/* nothing to do for BE */
338	if (rtd->dai_link->no_pcm)
339		return 0;
340
341	spcm = snd_sof_find_spcm_dai(component, rtd);
342	if (!spcm)
343		return -EINVAL;
344
345	spcm_dbg(spcm, substream->stream, "Entry: trigger (cmd: %d)\n", cmd);
346
347	spcm->pending_stop[substream->stream] = false;
348
349	switch (cmd) {
350	case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
351		ipc_first = true;
352		break;
353	case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
354		if (pcm_ops && pcm_ops->ipc_first_on_start)
355			ipc_first = true;
356		break;
357	case SNDRV_PCM_TRIGGER_START:
358		if (spcm->stream[substream->stream].suspend_ignored) {
359			/*
360			 * This case will be triggered when INFO_RESUME is
361			 * not supported, no need to re-start streams that
362			 * remained enabled in D0ix.
363			 */
364			spcm->stream[substream->stream].suspend_ignored = false;
365			return 0;
366		}
367
368		if (pcm_ops && pcm_ops->ipc_first_on_start)
369			ipc_first = true;
370		break;
371	case SNDRV_PCM_TRIGGER_SUSPEND:
372		/*
373		 * If DSP D0I3 is allowed during S0iX, set the suspend_ignored flag for
374		 * D0I3-compatible streams to keep the firmware pipeline running
375		 */
376		if (pcm_ops && pcm_ops->d0i3_supported_in_s0ix &&
377		    sdev->system_suspend_target == SOF_SUSPEND_S0IX &&
378		    spcm->stream[substream->stream].d0i3_compatible) {
379			spcm->stream[substream->stream].suspend_ignored = true;
380			return 0;
381		}
382
383		/* On suspend the DMA must be stopped in DSPless mode */
384		if (sdev->dspless_mode_selected)
385			reset_hw_params = true;
386
387		fallthrough;
388	case SNDRV_PCM_TRIGGER_STOP:
389		ipc_first = true;
390		if (pcm_ops && pcm_ops->reset_hw_params_during_stop)
391			reset_hw_params = true;
392		break;
393	default:
394		spcm_err(spcm, substream->stream, "Unhandled trigger cmd %d\n", cmd);
395		return -EINVAL;
396	}
397
398	if (!ipc_first)
399		snd_sof_pcm_platform_trigger(sdev, substream, cmd);
400
401	if (pcm_ops && pcm_ops->trigger)
402		ret = pcm_ops->trigger(component, substream, cmd);
403
404	switch (cmd) {
405	case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
406	case SNDRV_PCM_TRIGGER_START:
407		/* invoke platform trigger to start DMA only if pcm_ops is successful */
408		if (ipc_first && !ret)
409			snd_sof_pcm_platform_trigger(sdev, substream, cmd);
410		break;
411	case SNDRV_PCM_TRIGGER_SUSPEND:
412	case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
413	case SNDRV_PCM_TRIGGER_STOP:
414		/* invoke platform trigger to stop DMA even if pcm_ops isn't set or if it failed */
415		if (!pcm_ops || !pcm_ops->platform_stop_during_hw_free)
416			snd_sof_pcm_platform_trigger(sdev, substream, cmd);
417
418		/*
419		 * set the pending_stop flag to indicate that pipeline stop has been delayed.
420		 * This will be used later to stop the pipelines during prepare when recovering
421		 * from xruns.
422		 */
423		if (pcm_ops && pcm_ops->platform_stop_during_hw_free &&
424		    cmd == SNDRV_PCM_TRIGGER_STOP)
425			spcm->pending_stop[substream->stream] = true;
426		break;
427	default:
428		break;
429	}
430
431	/* free PCM if reset_hw_params is set and the STOP IPC is successful */
432	if (!ret && reset_hw_params)
433		ret = sof_pcm_stream_free(sdev, substream, spcm, substream->stream, false);
434
435	return ret;
436}
437
438static snd_pcm_uframes_t sof_pcm_pointer(struct snd_soc_component *component,
439					 struct snd_pcm_substream *substream)
440{
441	struct snd_soc_pcm_runtime *rtd = snd_soc_substream_to_rtd(substream);
442	struct snd_sof_dev *sdev = snd_soc_component_get_drvdata(component);
443	const struct sof_ipc_pcm_ops *pcm_ops = sof_ipc_get_ops(sdev, pcm);
444	struct snd_sof_pcm *spcm;
445	snd_pcm_uframes_t host, dai;
446	int ret = -EOPNOTSUPP;
447
448	/* nothing to do for BE */
449	if (rtd->dai_link->no_pcm)
450		return 0;
451
452	if (pcm_ops && pcm_ops->pointer)
453		ret = pcm_ops->pointer(component, substream, &host);
454
455	if (ret != -EOPNOTSUPP)
456		return ret ? ret : host;
457
458	/* use dsp ops pointer callback directly if set */
459	if (sof_ops(sdev)->pcm_pointer)
460		return sof_ops(sdev)->pcm_pointer(sdev, substream);
461
462	spcm = snd_sof_find_spcm_dai(component, rtd);
463	if (!spcm)
464		return -EINVAL;
465
466	/* read position from DSP */
467	host = bytes_to_frames(substream->runtime,
468			       spcm->stream[substream->stream].posn.host_posn);
469	dai = bytes_to_frames(substream->runtime,
470			      spcm->stream[substream->stream].posn.dai_posn);
471
472	trace_sof_pcm_pointer_position(sdev, spcm, substream, host, dai);
473
474	return host;
475}
476
477static int sof_pcm_open(struct snd_soc_component *component,
478			struct snd_pcm_substream *substream)
479{
480	struct snd_soc_pcm_runtime *rtd = snd_soc_substream_to_rtd(substream);
481	struct snd_pcm_runtime *runtime = substream->runtime;
482	struct snd_sof_dev *sdev = snd_soc_component_get_drvdata(component);
483	const struct snd_sof_dsp_ops *ops = sof_ops(sdev);
484	struct snd_sof_pcm *spcm;
485	struct snd_soc_tplg_stream_caps *caps;
486	int ret;
487
488	/* nothing to do for BE */
489	if (rtd->dai_link->no_pcm)
490		return 0;
491
492	spcm = snd_sof_find_spcm_dai(component, rtd);
493	if (!spcm)
494		return -EINVAL;
495
496	spcm_dbg(spcm, substream->stream, "Entry: open\n");
497
498	caps = &spcm->pcm.caps[substream->stream];
499
500	/* set runtime config */
501	runtime->hw.info = ops->hw_info; /* platform-specific */
502
503	/* set any runtime constraints based on topology */
504	runtime->hw.formats = le64_to_cpu(caps->formats);
505	runtime->hw.period_bytes_min = le32_to_cpu(caps->period_size_min);
506	runtime->hw.period_bytes_max = le32_to_cpu(caps->period_size_max);
507	runtime->hw.periods_min = le32_to_cpu(caps->periods_min);
508	runtime->hw.periods_max = le32_to_cpu(caps->periods_max);
509
510	/*
511	 * caps->buffer_size_min is not used since the
512	 * snd_pcm_hardware structure only defines buffer_bytes_max
513	 */
514	runtime->hw.buffer_bytes_max = le32_to_cpu(caps->buffer_size_max);
515
516	/* set wait time - TODO: come from topology */
517	substream->wait_time = 500;
518
519	spcm->stream[substream->stream].posn.host_posn = 0;
520	spcm->stream[substream->stream].posn.dai_posn = 0;
521	spcm->stream[substream->stream].substream = substream;
522	spcm->prepared[substream->stream] = false;
523
524	ret = snd_sof_pcm_platform_open(sdev, substream);
525	if (ret < 0) {
526		spcm_err(spcm, substream->stream,
527			 "platform pcm open failed %d\n", ret);
528		return ret;
529	}
530
531	spcm_dbg(spcm, substream->stream, "period bytes min %zd, max %zd\n",
532		 runtime->hw.period_bytes_min, runtime->hw.period_bytes_max);
533	spcm_dbg(spcm, substream->stream, "period count min %d, max %d\n",
534		 runtime->hw.periods_min, runtime->hw.periods_max);
535	spcm_dbg(spcm, substream->stream, "buffer bytes max %zd\n", runtime->hw.buffer_bytes_max);
536
537	return 0;
538}
539
540static int sof_pcm_close(struct snd_soc_component *component,
541			 struct snd_pcm_substream *substream)
542{
543	struct snd_soc_pcm_runtime *rtd = snd_soc_substream_to_rtd(substream);
544	struct snd_sof_dev *sdev = snd_soc_component_get_drvdata(component);
545	struct snd_sof_pcm *spcm;
546	int err;
547
548	/* nothing to do for BE */
549	if (rtd->dai_link->no_pcm)
550		return 0;
551
552	spcm = snd_sof_find_spcm_dai(component, rtd);
553	if (!spcm)
554		return -EINVAL;
555
556	spcm_dbg(spcm, substream->stream, "Entry: close\n");
557
558	err = snd_sof_pcm_platform_close(sdev, substream);
559	if (err < 0) {
560		spcm_err(spcm, substream->stream,
561			 "platform pcm close failed %d\n", err);
562		/*
563		 * keep going, no point in preventing the close
564		 * from happening
565		 */
566	}
567
568	spcm->stream[substream->stream].substream = NULL;
569
570	return 0;
571}
572
573/*
574 * Pre-allocate playback/capture audio buffer pages.
575 * no need to explicitly release memory preallocated by sof_pcm_new in pcm_free
576 * snd_pcm_lib_preallocate_free_for_all() is called by the core.
577 */
578static int sof_pcm_new(struct snd_soc_component *component,
579		       struct snd_soc_pcm_runtime *rtd)
580{
581	struct snd_sof_dev *sdev = snd_soc_component_get_drvdata(component);
582	struct snd_sof_pcm *spcm;
583	struct snd_pcm *pcm = rtd->pcm;
584	struct snd_soc_tplg_stream_caps *caps;
585	int stream = SNDRV_PCM_STREAM_PLAYBACK;
586
587	/* find SOF PCM for this RTD */
588	spcm = snd_sof_find_spcm_dai(component, rtd);
589	if (!spcm) {
590		dev_warn(component->dev, "warn: can't find PCM with DAI ID %d\n",
591			 rtd->dai_link->id);
592		return 0;
593	}
594
595	dev_dbg(spcm->scomp->dev, "pcm%u (%s): Entry: pcm_construct\n",
596		spcm->pcm.pcm_id, spcm->pcm.pcm_name);
597
598	/* do we need to pre-allocate playback audio buffer pages */
599	if (!spcm->pcm.playback)
600		goto capture;
601
602	caps = &spcm->pcm.caps[stream];
603
604	if (!pcm->streams[stream].substream) {
605		spcm_err(spcm, stream, "NULL playback substream!\n");
606		return -EINVAL;
607	}
608
609	/* pre-allocate playback audio buffer pages */
610	spcm_dbg(spcm, stream, "allocate %s playback DMA buffer size 0x%x max 0x%x\n",
611		 caps->name, caps->buffer_size_min, caps->buffer_size_max);
612
613	snd_pcm_set_managed_buffer(pcm->streams[stream].substream,
614				   SNDRV_DMA_TYPE_DEV_SG, sdev->dev,
615				   0, le32_to_cpu(caps->buffer_size_max));
616
617	/* Set the PCM device name for HDMI playback */
618	if (!strncmp(pcm->id, "HDMI", 4)) {
619		int hdmi_idx;
620
621		/*
622		 * Make sure that the name is in"HDMI<SPACE>x" format as this is
623		 * expected by user space.
624		 * See alsa-lib's __snd_pcm_info_eld_fixup_check() which is
625		 * guarding the __snd_pcm_info_eld_fixup() in
626		 * snd_ctl_hw_pcm_info() and snd_pcm_hw_info() library functions
627		 */
628		if (sscanf(pcm->id, "HDMI%d", &hdmi_idx) == 1)
629			snprintf(pcm->name, sizeof(pcm->name), "HDMI %d",
630				 hdmi_idx);
631		else
632			strscpy(pcm->name, pcm->id, sizeof(pcm->name));
633	}
634capture:
635	stream = SNDRV_PCM_STREAM_CAPTURE;
636
637	/* do we need to pre-allocate capture audio buffer pages */
638	if (!spcm->pcm.capture)
639		return 0;
640
641	caps = &spcm->pcm.caps[stream];
642
643	if (!pcm->streams[stream].substream) {
644		spcm_err(spcm, stream, "NULL capture substream!\n");
645		return -EINVAL;
646	}
647
648	/* pre-allocate capture audio buffer pages */
649	spcm_dbg(spcm, stream, "allocate %s capture DMA buffer size 0x%x max 0x%x\n",
650		 caps->name, caps->buffer_size_min, caps->buffer_size_max);
651
652	snd_pcm_set_managed_buffer(pcm->streams[stream].substream,
653				   SNDRV_DMA_TYPE_DEV_SG, sdev->dev,
654				   0, le32_to_cpu(caps->buffer_size_max));
655
656	return 0;
657}
658
659/* fixup the BE DAI link to match any values from topology */
660int sof_pcm_dai_link_fixup(struct snd_soc_pcm_runtime *rtd, struct snd_pcm_hw_params *params)
661{
662	struct snd_interval *rate = hw_param_interval(params,
663			SNDRV_PCM_HW_PARAM_RATE);
664	struct snd_interval *channels = hw_param_interval(params,
665						SNDRV_PCM_HW_PARAM_CHANNELS);
666	struct snd_mask *fmt = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT);
667	struct snd_soc_component *component =
668		snd_soc_rtdcom_lookup(rtd, SOF_AUDIO_PCM_DRV_NAME);
669	struct snd_sof_dai *dai =
670		snd_sof_find_dai(component, (char *)rtd->dai_link->name);
671	struct snd_sof_dev *sdev = snd_soc_component_get_drvdata(component);
672	const struct sof_ipc_pcm_ops *pcm_ops = sof_ipc_get_ops(sdev, pcm);
673
674	/* no topology exists for this BE, try a common configuration */
675	if (!dai) {
676		dev_warn(component->dev,
677			 "warning: no topology found for BE DAI %s config\n",
678			 rtd->dai_link->name);
679
680		/*  set 48k, stereo, 16bits by default */
681		rate->min = 48000;
682		rate->max = 48000;
683
684		channels->min = 2;
685		channels->max = 2;
686
687		snd_mask_none(fmt);
688		snd_mask_set_format(fmt, SNDRV_PCM_FORMAT_S16_LE);
689
690		return 0;
691	}
692
693	if (pcm_ops && pcm_ops->dai_link_fixup)
694		return pcm_ops->dai_link_fixup(rtd, params);
695
696	return 0;
697}
698EXPORT_SYMBOL(sof_pcm_dai_link_fixup);
699
700static int sof_pcm_probe(struct snd_soc_component *component)
701{
702	struct snd_sof_dev *sdev = snd_soc_component_get_drvdata(component);
703	struct snd_sof_pdata *plat_data = sdev->pdata;
704	const char *tplg_filename;
705	int ret;
706
707	/*
708	 * make sure the device is pm_runtime_active before loading the
709	 * topology and initiating IPC or bus transactions
710	 */
711	ret = pm_runtime_resume_and_get(component->dev);
712	if (ret < 0 && ret != -EACCES)
713		return ret;
714
715	/* load the default topology */
716	sdev->component = component;
717
718	tplg_filename = devm_kasprintf(sdev->dev, GFP_KERNEL,
719				       "%s/%s",
720				       plat_data->tplg_filename_prefix,
721				       plat_data->tplg_filename);
722	if (!tplg_filename) {
723		ret = -ENOMEM;
724		goto pm_error;
725	}
726
727	ret = snd_sof_load_topology(component, tplg_filename);
728	if (ret < 0)
729		dev_err(component->dev, "error: failed to load DSP topology %d\n",
730			ret);
731
732pm_error:
733	pm_runtime_put_autosuspend(component->dev);
734
735	return ret;
736}
737
738static void sof_pcm_remove(struct snd_soc_component *component)
739{
740	/* remove topology */
741	snd_soc_tplg_component_remove(component);
742}
743
744static int sof_pcm_ack(struct snd_soc_component *component,
745		       struct snd_pcm_substream *substream)
746{
747	struct snd_sof_dev *sdev = snd_soc_component_get_drvdata(component);
748
749	return snd_sof_pcm_platform_ack(sdev, substream);
750}
751
752static snd_pcm_sframes_t sof_pcm_delay(struct snd_soc_component *component,
753				       struct snd_pcm_substream *substream)
754{
755	struct snd_sof_dev *sdev = snd_soc_component_get_drvdata(component);
756	const struct sof_ipc_pcm_ops *pcm_ops = sof_ipc_get_ops(sdev, pcm);
757
758	if (pcm_ops && pcm_ops->delay)
759		return pcm_ops->delay(component, substream);
760
761	return 0;
762}
763
764void snd_sof_new_platform_drv(struct snd_sof_dev *sdev)
765{
766	struct snd_soc_component_driver *pd = &sdev->plat_drv;
767	struct snd_sof_pdata *plat_data = sdev->pdata;
768	const char *drv_name;
769
770	if (plat_data->machine)
771		drv_name = plat_data->machine->drv_name;
772	else if (plat_data->of_machine)
773		drv_name = plat_data->of_machine->drv_name;
774	else
775		drv_name = NULL;
776
777	pd->name = "sof-audio-component";
778	pd->probe = sof_pcm_probe;
779	pd->remove = sof_pcm_remove;
780	pd->open = sof_pcm_open;
781	pd->close = sof_pcm_close;
782	pd->hw_params = sof_pcm_hw_params;
783	pd->prepare = sof_pcm_prepare;
784	pd->hw_free = sof_pcm_hw_free;
785	pd->trigger = sof_pcm_trigger;
786	pd->pointer = sof_pcm_pointer;
787	pd->ack = sof_pcm_ack;
788	pd->delay = sof_pcm_delay;
789
790#if IS_ENABLED(CONFIG_SND_SOC_SOF_COMPRESS)
791	pd->compress_ops = &sof_compressed_ops;
792#endif
793
794	pd->pcm_construct = sof_pcm_new;
795	pd->ignore_machine = drv_name;
796	pd->be_pcm_base = SOF_BE_PCM_BASE;
797	pd->use_dai_pcm_id = true;
798	pd->topology_name_prefix = "sof";
799
800	 /* increment module refcount when a pcm is opened */
801	pd->module_get_upon_open = 1;
802
803	pd->legacy_dai_naming = 1;
804
805	/*
806	 * The fixup is only needed when the DSP is in use as with the DSPless
807	 * mode we are directly using the audio interface
808	 */
809	if (!sdev->dspless_mode_selected)
810		pd->be_hw_params_fixup = sof_pcm_dai_link_fixup;
811}