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(substream: 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(scomp: 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(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, stream: dir, list: &list,
82 custom_stop_condition: 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, fe_params: 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: &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(c: 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(scomp: 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: &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: &platform_params,
146 dir: 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(dev: component->dev, dmab,
156 page_table: spcm->stream[substream->stream].page_table.area,
157 size: 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, free_widget_list: 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(c: 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(scomp: 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, dir: substream->stream, free_widget_list: true);
273
274 cancel_work_sync(work: &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(c: 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(scomp: 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, dir: substream->stream, free_widget_list: true);
306 if (ret < 0)
307 return ret;
308 }
309
310 /* set hw_params */
311 ret = sof_pcm_hw_params(component,
312 substream, params: &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(c: 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(scomp: 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, dir: substream->stream, free_widget_list: 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(c: 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(scomp: component, rtd);
463 if (!spcm)
464 return -EINVAL;
465
466 /* read position from DSP */
467 host = bytes_to_frames(runtime: substream->runtime,
468 size: spcm->stream[substream->stream].posn.host_posn);
469 dai = bytes_to_frames(runtime: substream->runtime,
470 size: spcm->stream[substream->stream].posn.dai_posn);
471
472 trace_sof_pcm_pointer_position(sdev, spcm, substream, dma_posn: host, dai_posn: 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(c: 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(scomp: 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(c: 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(scomp: 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(c: 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(scomp: 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(substream: pcm->streams[stream].substream,
614 SNDRV_DMA_TYPE_DEV_SG, data: sdev->dev,
615 size: 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(buf: pcm->name, size: sizeof(pcm->name), fmt: "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(substream: pcm->streams[stream].substream,
653 SNDRV_DMA_TYPE_DEV_SG, data: sdev->dev,
654 size: 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(scomp: component, name: (char *)rtd->dai_link->name);
671 struct snd_sof_dev *sdev = snd_soc_component_get_drvdata(c: 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(mask: fmt);
688 snd_mask_set_format(mask: 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(c: 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(dev: 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(dev: sdev->dev, GFP_KERNEL,
719 fmt: "%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(scomp: component, file: 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(dev: 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(comp: 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(c: 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(c: 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}
812

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