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 /* Create DMA buffer page table for DSP */
24 static 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(component, rtd);
34 if (!spcm)
35 return -EINVAL;
36
37 return snd_sof_create_page_table(component->dev, dmab,
38 spcm->stream[stream].page_table.area, size);
39 }
40
41 /*
42 * sof pcm period elapse work
43 */
44 static 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(sps->substream);
51 }
52
53 void 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 */
61 void 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(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(&spcm->stream[substream->stream].period_elapsed_work);
84 }
85 EXPORT_SYMBOL(snd_sof_pcm_period_elapsed);
86
87 static int
88 sof_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, dir, &list,
100 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, 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);
115 return ret;
116 }
117 }
118
119 return 0;
120 }
121
122 static 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(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(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);
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,
166 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, runtime->dma_area,
174 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
194 static 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(component);
199 struct snd_sof_pcm *spcm;
200 int ret;
201
202 /* nothing to do for BE */
203 if (rtd->dai_link->no_pcm)
204 return 0;
205
206 spcm = snd_sof_find_spcm_dai(component, rtd);
207 if (!spcm)
208 return -EINVAL;
209
210 dev_dbg(component->dev, "pcm: free stream %d dir %d\n",
211 spcm->pcm.pcm_id, substream->stream);
212
213 ret = sof_pcm_stream_free(sdev, substream, spcm, substream->stream, true);
214
215 cancel_work_sync(&spcm->stream[substream->stream].period_elapsed_work);
216
217 return ret;
218 }
219
220 static int sof_pcm_prepare(struct snd_soc_component *component,
221 struct snd_pcm_substream *substream)
222 {
223 struct snd_soc_pcm_runtime *rtd = snd_soc_substream_to_rtd(substream);
224 struct snd_sof_dev *sdev = snd_soc_component_get_drvdata(component);
225 struct snd_sof_pcm *spcm;
226 int ret;
227
228 /* nothing to do for BE */
229 if (rtd->dai_link->no_pcm)
230 return 0;
231
232 spcm = snd_sof_find_spcm_dai(component, rtd);
233 if (!spcm)
234 return -EINVAL;
235
236 if (spcm->prepared[substream->stream]) {
237 if (!spcm->pending_stop[substream->stream])
238 return 0;
239
240 /*
241 * this case should be reached in case of xruns where we absolutely
242 * want to free-up and reset all PCM/DMA resources
243 */
244 ret = sof_pcm_stream_free(sdev, substream, spcm, substream->stream, true);
245 if (ret < 0)
246 return ret;
247 }
248
249 dev_dbg(component->dev, "pcm: prepare stream %d dir %d\n",
250 spcm->pcm.pcm_id, substream->stream);
251
252 /* set hw_params */
253 ret = sof_pcm_hw_params(component,
254 substream, &spcm->params[substream->stream]);
255 if (ret < 0) {
256 dev_err(component->dev,
257 "error: set pcm hw_params after resume\n");
258 return ret;
259 }
260
261 return 0;
262 }
263
264 /*
265 * FE dai link trigger actions are always executed in non-atomic context because
266 * they involve IPC's.
267 */
268 static int sof_pcm_trigger(struct snd_soc_component *component,
269 struct snd_pcm_substream *substream, int cmd)
270 {
271 struct snd_soc_pcm_runtime *rtd = snd_soc_substream_to_rtd(substream);
272 struct snd_sof_dev *sdev = snd_soc_component_get_drvdata(component);
273 const struct sof_ipc_pcm_ops *pcm_ops = sof_ipc_get_ops(sdev, pcm);
274 struct snd_sof_pcm *spcm;
275 bool reset_hw_params = false;
276 bool ipc_first = false;
277 int ret = 0;
278
279 /* nothing to do for BE */
280 if (rtd->dai_link->no_pcm)
281 return 0;
282
283 spcm = snd_sof_find_spcm_dai(component, rtd);
284 if (!spcm)
285 return -EINVAL;
286
287 dev_dbg(component->dev, "pcm: trigger stream %d dir %d cmd %d\n",
288 spcm->pcm.pcm_id, substream->stream, cmd);
289
290 spcm->pending_stop[substream->stream] = false;
291
292 switch (cmd) {
293 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
294 ipc_first = true;
295 break;
296 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
297 if (pcm_ops && pcm_ops->ipc_first_on_start)
298 ipc_first = true;
299 break;
300 case SNDRV_PCM_TRIGGER_START:
301 if (spcm->stream[substream->stream].suspend_ignored) {
302 /*
303 * This case will be triggered when INFO_RESUME is
304 * not supported, no need to re-start streams that
305 * remained enabled in D0ix.
306 */
307 spcm->stream[substream->stream].suspend_ignored = false;
308 return 0;
309 }
310
311 if (pcm_ops && pcm_ops->ipc_first_on_start)
312 ipc_first = true;
313 break;
314 case SNDRV_PCM_TRIGGER_SUSPEND:
315 /*
316 * If DSP D0I3 is allowed during S0iX, set the suspend_ignored flag for
317 * D0I3-compatible streams to keep the firmware pipeline running
318 */
319 if (pcm_ops && pcm_ops->d0i3_supported_in_s0ix &&
320 sdev->system_suspend_target == SOF_SUSPEND_S0IX &&
321 spcm->stream[substream->stream].d0i3_compatible) {
322 spcm->stream[substream->stream].suspend_ignored = true;
323 return 0;
324 }
325
326 /* On suspend the DMA must be stopped in DSPless mode */
327 if (sdev->dspless_mode_selected)
328 reset_hw_params = true;
329
330 fallthrough;
331 case SNDRV_PCM_TRIGGER_STOP:
332 ipc_first = true;
333 if (pcm_ops && pcm_ops->reset_hw_params_during_stop)
334 reset_hw_params = true;
335 break;
336 default:
337 dev_err(component->dev, "Unhandled trigger cmd %d\n", cmd);
338 return -EINVAL;
339 }
340
341 if (!ipc_first)
342 snd_sof_pcm_platform_trigger(sdev, substream, cmd);
343
344 if (pcm_ops && pcm_ops->trigger)
345 ret = pcm_ops->trigger(component, substream, cmd);
346
347 switch (cmd) {
348 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
349 case SNDRV_PCM_TRIGGER_START:
350 /* invoke platform trigger to start DMA only if pcm_ops is successful */
351 if (ipc_first && !ret)
352 snd_sof_pcm_platform_trigger(sdev, substream, cmd);
353 break;
354 case SNDRV_PCM_TRIGGER_SUSPEND:
355 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
356 case SNDRV_PCM_TRIGGER_STOP:
357 /* invoke platform trigger to stop DMA even if pcm_ops isn't set or if it failed */
358 if (!pcm_ops || !pcm_ops->platform_stop_during_hw_free)
359 snd_sof_pcm_platform_trigger(sdev, substream, cmd);
360
361 /*
362 * set the pending_stop flag to indicate that pipeline stop has been delayed.
363 * This will be used later to stop the pipelines during prepare when recovering
364 * from xruns.
365 */
366 if (pcm_ops && pcm_ops->platform_stop_during_hw_free &&
367 cmd == SNDRV_PCM_TRIGGER_STOP)
368 spcm->pending_stop[substream->stream] = true;
369 break;
370 default:
371 break;
372 }
373
374 /* free PCM if reset_hw_params is set and the STOP IPC is successful */
375 if (!ret && reset_hw_params)
376 ret = sof_pcm_stream_free(sdev, substream, spcm, substream->stream, false);
377
378 return ret;
379 }
380
381 static snd_pcm_uframes_t sof_pcm_pointer(struct snd_soc_component *component,
382 struct snd_pcm_substream *substream)
383 {
384 struct snd_soc_pcm_runtime *rtd = snd_soc_substream_to_rtd(substream);
385 struct snd_sof_dev *sdev = snd_soc_component_get_drvdata(component);
386 const struct sof_ipc_pcm_ops *pcm_ops = sof_ipc_get_ops(sdev, pcm);
387 struct snd_sof_pcm *spcm;
388 snd_pcm_uframes_t host, dai;
389 int ret = -EOPNOTSUPP;
390
391 /* nothing to do for BE */
392 if (rtd->dai_link->no_pcm)
393 return 0;
394
395 if (pcm_ops && pcm_ops->pointer)
396 ret = pcm_ops->pointer(component, substream, &host);
397
398 if (ret != -EOPNOTSUPP)
399 return ret ? ret : host;
400
401 /* use dsp ops pointer callback directly if set */
402 if (sof_ops(sdev)->pcm_pointer)
403 return sof_ops(sdev)->pcm_pointer(sdev, substream);
404
405 spcm = snd_sof_find_spcm_dai(component, rtd);
406 if (!spcm)
407 return -EINVAL;
408
409 /* read position from DSP */
410 host = bytes_to_frames(substream->runtime,
411 spcm->stream[substream->stream].posn.host_posn);
412 dai = bytes_to_frames(substream->runtime,
413 spcm->stream[substream->stream].posn.dai_posn);
414
415 trace_sof_pcm_pointer_position(sdev, spcm, substream, host, dai);
416
417 return host;
418 }
419
420 static int sof_pcm_open(struct snd_soc_component *component,
421 struct snd_pcm_substream *substream)
422 {
423 struct snd_soc_pcm_runtime *rtd = snd_soc_substream_to_rtd(substream);
424 struct snd_pcm_runtime *runtime = substream->runtime;
425 struct snd_sof_dev *sdev = snd_soc_component_get_drvdata(component);
426 const struct snd_sof_dsp_ops *ops = sof_ops(sdev);
427 struct snd_sof_pcm *spcm;
428 struct snd_soc_tplg_stream_caps *caps;
429 int ret;
430
431 /* nothing to do for BE */
432 if (rtd->dai_link->no_pcm)
433 return 0;
434
435 spcm = snd_sof_find_spcm_dai(component, rtd);
436 if (!spcm)
437 return -EINVAL;
438
439 dev_dbg(component->dev, "pcm: open stream %d dir %d\n",
440 spcm->pcm.pcm_id, substream->stream);
441
442
443 caps = &spcm->pcm.caps[substream->stream];
444
445 /* set runtime config */
446 runtime->hw.info = ops->hw_info; /* platform-specific */
447
448 /* set any runtime constraints based on topology */
449 runtime->hw.formats = le64_to_cpu(caps->formats);
450 runtime->hw.period_bytes_min = le32_to_cpu(caps->period_size_min);
451 runtime->hw.period_bytes_max = le32_to_cpu(caps->period_size_max);
452 runtime->hw.periods_min = le32_to_cpu(caps->periods_min);
453 runtime->hw.periods_max = le32_to_cpu(caps->periods_max);
454
455 /*
456 * caps->buffer_size_min is not used since the
457 * snd_pcm_hardware structure only defines buffer_bytes_max
458 */
459 runtime->hw.buffer_bytes_max = le32_to_cpu(caps->buffer_size_max);
460
461 dev_dbg(component->dev, "period min %zd max %zd bytes\n",
462 runtime->hw.period_bytes_min,
463 runtime->hw.period_bytes_max);
464 dev_dbg(component->dev, "period count %d max %d\n",
465 runtime->hw.periods_min,
466 runtime->hw.periods_max);
467 dev_dbg(component->dev, "buffer max %zd bytes\n",
468 runtime->hw.buffer_bytes_max);
469
470 /* set wait time - TODO: come from topology */
471 substream->wait_time = 500;
472
473 spcm->stream[substream->stream].posn.host_posn = 0;
474 spcm->stream[substream->stream].posn.dai_posn = 0;
475 spcm->stream[substream->stream].substream = substream;
476 spcm->prepared[substream->stream] = false;
477
478 ret = snd_sof_pcm_platform_open(sdev, substream);
479 if (ret < 0)
480 dev_err(component->dev, "error: pcm open failed %d\n", ret);
481
482 return ret;
483 }
484
485 static int sof_pcm_close(struct snd_soc_component *component,
486 struct snd_pcm_substream *substream)
487 {
488 struct snd_soc_pcm_runtime *rtd = snd_soc_substream_to_rtd(substream);
489 struct snd_sof_dev *sdev = snd_soc_component_get_drvdata(component);
490 struct snd_sof_pcm *spcm;
491 int err;
492
493 /* nothing to do for BE */
494 if (rtd->dai_link->no_pcm)
495 return 0;
496
497 spcm = snd_sof_find_spcm_dai(component, rtd);
498 if (!spcm)
499 return -EINVAL;
500
501 dev_dbg(component->dev, "pcm: close stream %d dir %d\n",
502 spcm->pcm.pcm_id, substream->stream);
503
504 err = snd_sof_pcm_platform_close(sdev, substream);
505 if (err < 0) {
506 dev_err(component->dev, "error: pcm close failed %d\n",
507 err);
508 /*
509 * keep going, no point in preventing the close
510 * from happening
511 */
512 }
513
514 return 0;
515 }
516
517 /*
518 * Pre-allocate playback/capture audio buffer pages.
519 * no need to explicitly release memory preallocated by sof_pcm_new in pcm_free
520 * snd_pcm_lib_preallocate_free_for_all() is called by the core.
521 */
522 static int sof_pcm_new(struct snd_soc_component *component,
523 struct snd_soc_pcm_runtime *rtd)
524 {
525 struct snd_sof_dev *sdev = snd_soc_component_get_drvdata(component);
526 struct snd_sof_pcm *spcm;
527 struct snd_pcm *pcm = rtd->pcm;
528 struct snd_soc_tplg_stream_caps *caps;
529 int stream = SNDRV_PCM_STREAM_PLAYBACK;
530
531 /* find SOF PCM for this RTD */
532 spcm = snd_sof_find_spcm_dai(component, rtd);
533 if (!spcm) {
534 dev_warn(component->dev, "warn: can't find PCM with DAI ID %d\n",
535 rtd->dai_link->id);
536 return 0;
537 }
538
539 dev_dbg(component->dev, "creating new PCM %s\n", spcm->pcm.pcm_name);
540
541 /* do we need to pre-allocate playback audio buffer pages */
542 if (!spcm->pcm.playback)
543 goto capture;
544
545 caps = &spcm->pcm.caps[stream];
546
547 /* pre-allocate playback audio buffer pages */
548 dev_dbg(component->dev,
549 "spcm: allocate %s playback DMA buffer size 0x%x max 0x%x\n",
550 caps->name, caps->buffer_size_min, caps->buffer_size_max);
551
552 if (!pcm->streams[stream].substream) {
553 dev_err(component->dev, "error: NULL playback substream!\n");
554 return -EINVAL;
555 }
556
557 snd_pcm_set_managed_buffer(pcm->streams[stream].substream,
558 SNDRV_DMA_TYPE_DEV_SG, sdev->dev,
559 0, le32_to_cpu(caps->buffer_size_max));
560 capture:
561 stream = SNDRV_PCM_STREAM_CAPTURE;
562
563 /* do we need to pre-allocate capture audio buffer pages */
564 if (!spcm->pcm.capture)
565 return 0;
566
567 caps = &spcm->pcm.caps[stream];
568
569 /* pre-allocate capture audio buffer pages */
570 dev_dbg(component->dev,
571 "spcm: allocate %s capture DMA buffer size 0x%x max 0x%x\n",
572 caps->name, caps->buffer_size_min, caps->buffer_size_max);
573
574 if (!pcm->streams[stream].substream) {
575 dev_err(component->dev, "error: NULL capture substream!\n");
576 return -EINVAL;
577 }
578
579 snd_pcm_set_managed_buffer(pcm->streams[stream].substream,
580 SNDRV_DMA_TYPE_DEV_SG, sdev->dev,
581 0, le32_to_cpu(caps->buffer_size_max));
582
583 return 0;
584 }
585
586 /* fixup the BE DAI link to match any values from topology */
587 int sof_pcm_dai_link_fixup(struct snd_soc_pcm_runtime *rtd, struct snd_pcm_hw_params *params)
588 {
589 struct snd_interval *rate = hw_param_interval(params,
590 SNDRV_PCM_HW_PARAM_RATE);
591 struct snd_interval *channels = hw_param_interval(params,
592 SNDRV_PCM_HW_PARAM_CHANNELS);
593 struct snd_mask *fmt = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT);
594 struct snd_soc_component *component =
595 snd_soc_rtdcom_lookup(rtd, SOF_AUDIO_PCM_DRV_NAME);
596 struct snd_sof_dai *dai =
597 snd_sof_find_dai(component, (char *)rtd->dai_link->name);
598 struct snd_sof_dev *sdev = snd_soc_component_get_drvdata(component);
599 const struct sof_ipc_pcm_ops *pcm_ops = sof_ipc_get_ops(sdev, pcm);
600
601 /* no topology exists for this BE, try a common configuration */
602 if (!dai) {
603 dev_warn(component->dev,
604 "warning: no topology found for BE DAI %s config\n",
605 rtd->dai_link->name);
606
607 /* set 48k, stereo, 16bits by default */
608 rate->min = 48000;
609 rate->max = 48000;
610
611 channels->min = 2;
612 channels->max = 2;
613
614 snd_mask_none(fmt);
615 snd_mask_set_format(fmt, SNDRV_PCM_FORMAT_S16_LE);
616
617 return 0;
618 }
619
620 if (pcm_ops && pcm_ops->dai_link_fixup)
621 return pcm_ops->dai_link_fixup(rtd, params);
622
623 return 0;
624 }
625 EXPORT_SYMBOL(sof_pcm_dai_link_fixup);
626
627 static int sof_pcm_probe(struct snd_soc_component *component)
628 {
629 struct snd_sof_dev *sdev = snd_soc_component_get_drvdata(component);
630 struct snd_sof_pdata *plat_data = sdev->pdata;
631 const char *tplg_filename;
632 int ret;
633
634 /*
635 * make sure the device is pm_runtime_active before loading the
636 * topology and initiating IPC or bus transactions
637 */
638 ret = pm_runtime_resume_and_get(component->dev);
639 if (ret < 0 && ret != -EACCES)
640 return ret;
641
642 /* load the default topology */
643 sdev->component = component;
644
645 tplg_filename = devm_kasprintf(sdev->dev, GFP_KERNEL,
646 "%s/%s",
647 plat_data->tplg_filename_prefix,
648 plat_data->tplg_filename);
649 if (!tplg_filename) {
650 ret = -ENOMEM;
651 goto pm_error;
652 }
653
654 ret = snd_sof_load_topology(component, tplg_filename);
655 if (ret < 0)
656 dev_err(component->dev, "error: failed to load DSP topology %d\n",
657 ret);
658
659 pm_error:
660 pm_runtime_mark_last_busy(component->dev);
661 pm_runtime_put_autosuspend(component->dev);
662
663 return ret;
664 }
665
666 static void sof_pcm_remove(struct snd_soc_component *component)
667 {
668 /* remove topology */
669 snd_soc_tplg_component_remove(component);
670 }
671
672 static int sof_pcm_ack(struct snd_soc_component *component,
673 struct snd_pcm_substream *substream)
674 {
675 struct snd_sof_dev *sdev = snd_soc_component_get_drvdata(component);
676
677 return snd_sof_pcm_platform_ack(sdev, substream);
678 }
679
680 static snd_pcm_sframes_t sof_pcm_delay(struct snd_soc_component *component,
681 struct snd_pcm_substream *substream)
682 {
683 struct snd_sof_dev *sdev = snd_soc_component_get_drvdata(component);
684 const struct sof_ipc_pcm_ops *pcm_ops = sof_ipc_get_ops(sdev, pcm);
685
686 if (pcm_ops && pcm_ops->delay)
687 return pcm_ops->delay(component, substream);
688
689 return 0;
690 }
691
692 void snd_sof_new_platform_drv(struct snd_sof_dev *sdev)
693 {
694 struct snd_soc_component_driver *pd = &sdev->plat_drv;
695 struct snd_sof_pdata *plat_data = sdev->pdata;
696 const char *drv_name;
697
698 if (plat_data->machine)
699 drv_name = plat_data->machine->drv_name;
700 else if (plat_data->of_machine)
701 drv_name = plat_data->of_machine->drv_name;
702 else
703 drv_name = NULL;
704
705 pd->name = "sof-audio-component";
706 pd->probe = sof_pcm_probe;
707 pd->remove = sof_pcm_remove;
708 pd->open = sof_pcm_open;
709 pd->close = sof_pcm_close;
710 pd->hw_params = sof_pcm_hw_params;
711 pd->prepare = sof_pcm_prepare;
712 pd->hw_free = sof_pcm_hw_free;
713 pd->trigger = sof_pcm_trigger;
714 pd->pointer = sof_pcm_pointer;
715 pd->ack = sof_pcm_ack;
716 pd->delay = sof_pcm_delay;
717
718 #if IS_ENABLED(CONFIG_SND_SOC_SOF_COMPRESS)
719 pd->compress_ops = &sof_compressed_ops;
720 #endif
721
722 pd->pcm_construct = sof_pcm_new;
723 pd->ignore_machine = drv_name;
724 pd->be_pcm_base = SOF_BE_PCM_BASE;
725 pd->use_dai_pcm_id = true;
726 pd->topology_name_prefix = "sof";
727
728 /* increment module refcount when a pcm is opened */
729 pd->module_get_upon_open = 1;
730
731 pd->legacy_dai_naming = 1;
732
733 /*
734 * The fixup is only needed when the DSP is in use as with the DSPless
735 * mode we are directly using the audio interface
736 */
737 if (!sdev->dspless_mode_selected)
738 pd->be_hw_params_fixup = sof_pcm_dai_link_fixup;
739 }
740
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