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

source code of linux/sound/soc/sof/pcm.c