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