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 */
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 = asoc_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 = asoc_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 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
sof_pcm_hw_params(struct snd_soc_component * component,struct snd_pcm_substream * substream,struct snd_pcm_hw_params * params)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 = asoc_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
sof_pcm_hw_free(struct snd_soc_component * component,struct snd_pcm_substream * substream)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 = asoc_substream_to_rtd(substream);
198 struct snd_sof_dev *sdev = snd_soc_component_get_drvdata(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(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, substream->stream);
238 if (ret < 0)
239 err = ret;
240
241 cancel_work_sync(&spcm->stream[substream->stream].period_elapsed_work);
242
243 return err;
244 }
245
sof_pcm_prepare(struct snd_soc_component * component,struct snd_pcm_substream * substream)246 static int sof_pcm_prepare(struct snd_soc_component *component,
247 struct snd_pcm_substream *substream)
248 {
249 struct snd_soc_pcm_runtime *rtd = asoc_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(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, &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 */
sof_pcm_trigger(struct snd_soc_component * component,struct snd_pcm_substream * substream,int cmd)283 static 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 = asoc_substream_to_rtd(substream);
287 struct snd_sof_dev *sdev = snd_soc_component_get_drvdata(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(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 /*
329 * If DSP D0I3 is allowed during S0iX, set the suspend_ignored flag for
330 * D0I3-compatible streams to keep the firmware pipeline running
331 */
332 if (pcm_ops && pcm_ops->d0i3_supported_in_s0ix &&
333 sdev->system_suspend_target == SOF_SUSPEND_S0IX &&
334 spcm->stream[substream->stream].d0i3_compatible) {
335 spcm->stream[substream->stream].suspend_ignored = true;
336 return 0;
337 }
338
339 /* On suspend the DMA must be stopped in DSPless mode */
340 if (sdev->dspless_mode_selected)
341 reset_hw_params = true;
342
343 fallthrough;
344 case SNDRV_PCM_TRIGGER_STOP:
345 ipc_first = true;
346 if (pcm_ops && pcm_ops->reset_hw_params_during_stop)
347 reset_hw_params = true;
348 break;
349 default:
350 dev_err(component->dev, "Unhandled trigger cmd %d\n", cmd);
351 return -EINVAL;
352 }
353
354 if (!ipc_first)
355 snd_sof_pcm_platform_trigger(sdev, substream, cmd);
356
357 if (pcm_ops && pcm_ops->trigger)
358 ret = pcm_ops->trigger(component, substream, cmd);
359
360 switch (cmd) {
361 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
362 case SNDRV_PCM_TRIGGER_START:
363 /* invoke platform trigger to start DMA only if pcm_ops is successful */
364 if (ipc_first && !ret)
365 snd_sof_pcm_platform_trigger(sdev, substream, cmd);
366 break;
367 case SNDRV_PCM_TRIGGER_SUSPEND:
368 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
369 case SNDRV_PCM_TRIGGER_STOP:
370 /* invoke platform trigger to stop DMA even if pcm_ops isn't set or if it failed */
371 if (!pcm_ops || !pcm_ops->platform_stop_during_hw_free)
372 snd_sof_pcm_platform_trigger(sdev, substream, cmd);
373 break;
374 default:
375 break;
376 }
377
378 /* free PCM if reset_hw_params is set and the STOP IPC is successful */
379 if (!ret && reset_hw_params)
380 ret = sof_pcm_stream_free(sdev, substream, spcm, substream->stream, false);
381
382 return ret;
383 }
384
sof_pcm_pointer(struct snd_soc_component * component,struct snd_pcm_substream * substream)385 static snd_pcm_uframes_t sof_pcm_pointer(struct snd_soc_component *component,
386 struct snd_pcm_substream *substream)
387 {
388 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
389 struct snd_sof_dev *sdev = snd_soc_component_get_drvdata(component);
390 struct snd_sof_pcm *spcm;
391 snd_pcm_uframes_t host, dai;
392
393 /* nothing to do for BE */
394 if (rtd->dai_link->no_pcm)
395 return 0;
396
397 /* use dsp ops pointer callback directly if set */
398 if (sof_ops(sdev)->pcm_pointer)
399 return sof_ops(sdev)->pcm_pointer(sdev, substream);
400
401 spcm = snd_sof_find_spcm_dai(component, rtd);
402 if (!spcm)
403 return -EINVAL;
404
405 /* read position from DSP */
406 host = bytes_to_frames(substream->runtime,
407 spcm->stream[substream->stream].posn.host_posn);
408 dai = bytes_to_frames(substream->runtime,
409 spcm->stream[substream->stream].posn.dai_posn);
410
411 trace_sof_pcm_pointer_position(sdev, spcm, substream, host, dai);
412
413 return host;
414 }
415
sof_pcm_open(struct snd_soc_component * component,struct snd_pcm_substream * substream)416 static int sof_pcm_open(struct snd_soc_component *component,
417 struct snd_pcm_substream *substream)
418 {
419 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
420 struct snd_pcm_runtime *runtime = substream->runtime;
421 struct snd_sof_dev *sdev = snd_soc_component_get_drvdata(component);
422 struct snd_sof_dsp_ops *ops = sof_ops(sdev);
423 struct snd_sof_pcm *spcm;
424 struct snd_soc_tplg_stream_caps *caps;
425 int ret;
426
427 /* nothing to do for BE */
428 if (rtd->dai_link->no_pcm)
429 return 0;
430
431 spcm = snd_sof_find_spcm_dai(component, rtd);
432 if (!spcm)
433 return -EINVAL;
434
435 dev_dbg(component->dev, "pcm: open stream %d dir %d\n",
436 spcm->pcm.pcm_id, substream->stream);
437
438
439 caps = &spcm->pcm.caps[substream->stream];
440
441 /* set runtime config */
442 runtime->hw.info = ops->hw_info; /* platform-specific */
443
444 /* set any runtime constraints based on topology */
445 runtime->hw.formats = le64_to_cpu(caps->formats);
446 runtime->hw.period_bytes_min = le32_to_cpu(caps->period_size_min);
447 runtime->hw.period_bytes_max = le32_to_cpu(caps->period_size_max);
448 runtime->hw.periods_min = le32_to_cpu(caps->periods_min);
449 runtime->hw.periods_max = le32_to_cpu(caps->periods_max);
450
451 /*
452 * caps->buffer_size_min is not used since the
453 * snd_pcm_hardware structure only defines buffer_bytes_max
454 */
455 runtime->hw.buffer_bytes_max = le32_to_cpu(caps->buffer_size_max);
456
457 dev_dbg(component->dev, "period min %zd max %zd bytes\n",
458 runtime->hw.period_bytes_min,
459 runtime->hw.period_bytes_max);
460 dev_dbg(component->dev, "period count %d max %d\n",
461 runtime->hw.periods_min,
462 runtime->hw.periods_max);
463 dev_dbg(component->dev, "buffer max %zd bytes\n",
464 runtime->hw.buffer_bytes_max);
465
466 /* set wait time - TODO: come from topology */
467 substream->wait_time = 500;
468
469 spcm->stream[substream->stream].posn.host_posn = 0;
470 spcm->stream[substream->stream].posn.dai_posn = 0;
471 spcm->stream[substream->stream].substream = substream;
472 spcm->prepared[substream->stream] = false;
473
474 ret = snd_sof_pcm_platform_open(sdev, substream);
475 if (ret < 0)
476 dev_err(component->dev, "error: pcm open failed %d\n", ret);
477
478 return ret;
479 }
480
sof_pcm_close(struct snd_soc_component * component,struct snd_pcm_substream * substream)481 static int sof_pcm_close(struct snd_soc_component *component,
482 struct snd_pcm_substream *substream)
483 {
484 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
485 struct snd_sof_dev *sdev = snd_soc_component_get_drvdata(component);
486 struct snd_sof_pcm *spcm;
487 int err;
488
489 /* nothing to do for BE */
490 if (rtd->dai_link->no_pcm)
491 return 0;
492
493 spcm = snd_sof_find_spcm_dai(component, rtd);
494 if (!spcm)
495 return -EINVAL;
496
497 dev_dbg(component->dev, "pcm: close stream %d dir %d\n",
498 spcm->pcm.pcm_id, substream->stream);
499
500 err = snd_sof_pcm_platform_close(sdev, substream);
501 if (err < 0) {
502 dev_err(component->dev, "error: pcm close failed %d\n",
503 err);
504 /*
505 * keep going, no point in preventing the close
506 * from happening
507 */
508 }
509
510 return 0;
511 }
512
513 /*
514 * Pre-allocate playback/capture audio buffer pages.
515 * no need to explicitly release memory preallocated by sof_pcm_new in pcm_free
516 * snd_pcm_lib_preallocate_free_for_all() is called by the core.
517 */
sof_pcm_new(struct snd_soc_component * component,struct snd_soc_pcm_runtime * rtd)518 static int sof_pcm_new(struct snd_soc_component *component,
519 struct snd_soc_pcm_runtime *rtd)
520 {
521 struct snd_sof_dev *sdev = snd_soc_component_get_drvdata(component);
522 struct snd_sof_pcm *spcm;
523 struct snd_pcm *pcm = rtd->pcm;
524 struct snd_soc_tplg_stream_caps *caps;
525 int stream = SNDRV_PCM_STREAM_PLAYBACK;
526
527 /* find SOF PCM for this RTD */
528 spcm = snd_sof_find_spcm_dai(component, rtd);
529 if (!spcm) {
530 dev_warn(component->dev, "warn: can't find PCM with DAI ID %d\n",
531 rtd->dai_link->id);
532 return 0;
533 }
534
535 dev_dbg(component->dev, "creating new PCM %s\n", spcm->pcm.pcm_name);
536
537 /* do we need to pre-allocate playback audio buffer pages */
538 if (!spcm->pcm.playback)
539 goto capture;
540
541 caps = &spcm->pcm.caps[stream];
542
543 /* pre-allocate playback audio buffer pages */
544 dev_dbg(component->dev,
545 "spcm: allocate %s playback DMA buffer size 0x%x max 0x%x\n",
546 caps->name, caps->buffer_size_min, caps->buffer_size_max);
547
548 if (!pcm->streams[stream].substream) {
549 dev_err(component->dev, "error: NULL playback substream!\n");
550 return -EINVAL;
551 }
552
553 snd_pcm_set_managed_buffer(pcm->streams[stream].substream,
554 SNDRV_DMA_TYPE_DEV_SG, sdev->dev,
555 0, le32_to_cpu(caps->buffer_size_max));
556 capture:
557 stream = SNDRV_PCM_STREAM_CAPTURE;
558
559 /* do we need to pre-allocate capture audio buffer pages */
560 if (!spcm->pcm.capture)
561 return 0;
562
563 caps = &spcm->pcm.caps[stream];
564
565 /* pre-allocate capture audio buffer pages */
566 dev_dbg(component->dev,
567 "spcm: allocate %s capture DMA buffer size 0x%x max 0x%x\n",
568 caps->name, caps->buffer_size_min, caps->buffer_size_max);
569
570 if (!pcm->streams[stream].substream) {
571 dev_err(component->dev, "error: NULL capture substream!\n");
572 return -EINVAL;
573 }
574
575 snd_pcm_set_managed_buffer(pcm->streams[stream].substream,
576 SNDRV_DMA_TYPE_DEV_SG, sdev->dev,
577 0, le32_to_cpu(caps->buffer_size_max));
578
579 return 0;
580 }
581
582 /* 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)583 int sof_pcm_dai_link_fixup(struct snd_soc_pcm_runtime *rtd, struct snd_pcm_hw_params *params)
584 {
585 struct snd_interval *rate = hw_param_interval(params,
586 SNDRV_PCM_HW_PARAM_RATE);
587 struct snd_interval *channels = hw_param_interval(params,
588 SNDRV_PCM_HW_PARAM_CHANNELS);
589 struct snd_mask *fmt = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT);
590 struct snd_soc_component *component =
591 snd_soc_rtdcom_lookup(rtd, SOF_AUDIO_PCM_DRV_NAME);
592 struct snd_sof_dai *dai =
593 snd_sof_find_dai(component, (char *)rtd->dai_link->name);
594 struct snd_sof_dev *sdev = snd_soc_component_get_drvdata(component);
595 const struct sof_ipc_pcm_ops *pcm_ops = sof_ipc_get_ops(sdev, pcm);
596
597 /* no topology exists for this BE, try a common configuration */
598 if (!dai) {
599 dev_warn(component->dev,
600 "warning: no topology found for BE DAI %s config\n",
601 rtd->dai_link->name);
602
603 /* set 48k, stereo, 16bits by default */
604 rate->min = 48000;
605 rate->max = 48000;
606
607 channels->min = 2;
608 channels->max = 2;
609
610 snd_mask_none(fmt);
611 snd_mask_set_format(fmt, SNDRV_PCM_FORMAT_S16_LE);
612
613 return 0;
614 }
615
616 if (pcm_ops && pcm_ops->dai_link_fixup)
617 return pcm_ops->dai_link_fixup(rtd, params);
618
619 return 0;
620 }
621 EXPORT_SYMBOL(sof_pcm_dai_link_fixup);
622
sof_pcm_probe(struct snd_soc_component * component)623 static int sof_pcm_probe(struct snd_soc_component *component)
624 {
625 struct snd_sof_dev *sdev = snd_soc_component_get_drvdata(component);
626 struct snd_sof_pdata *plat_data = sdev->pdata;
627 const char *tplg_filename;
628 int ret;
629
630 /*
631 * make sure the device is pm_runtime_active before loading the
632 * topology and initiating IPC or bus transactions
633 */
634 ret = pm_runtime_resume_and_get(component->dev);
635 if (ret < 0 && ret != -EACCES)
636 return ret;
637
638 /* load the default topology */
639 sdev->component = component;
640
641 tplg_filename = devm_kasprintf(sdev->dev, GFP_KERNEL,
642 "%s/%s",
643 plat_data->tplg_filename_prefix,
644 plat_data->tplg_filename);
645 if (!tplg_filename) {
646 ret = -ENOMEM;
647 goto pm_error;
648 }
649
650 ret = snd_sof_load_topology(component, tplg_filename);
651 if (ret < 0)
652 dev_err(component->dev, "error: failed to load DSP topology %d\n",
653 ret);
654
655 pm_error:
656 pm_runtime_mark_last_busy(component->dev);
657 pm_runtime_put_autosuspend(component->dev);
658
659 return ret;
660 }
661
sof_pcm_remove(struct snd_soc_component * component)662 static void sof_pcm_remove(struct snd_soc_component *component)
663 {
664 /* remove topology */
665 snd_soc_tplg_component_remove(component);
666 }
667
sof_pcm_ack(struct snd_soc_component * component,struct snd_pcm_substream * substream)668 static int sof_pcm_ack(struct snd_soc_component *component,
669 struct snd_pcm_substream *substream)
670 {
671 struct snd_sof_dev *sdev = snd_soc_component_get_drvdata(component);
672
673 return snd_sof_pcm_platform_ack(sdev, substream);
674 }
675
sof_pcm_delay(struct snd_soc_component * component,struct snd_pcm_substream * substream)676 static snd_pcm_sframes_t sof_pcm_delay(struct snd_soc_component *component,
677 struct snd_pcm_substream *substream)
678 {
679 struct snd_sof_dev *sdev = snd_soc_component_get_drvdata(component);
680 const struct sof_ipc_pcm_ops *pcm_ops = sof_ipc_get_ops(sdev, pcm);
681
682 if (pcm_ops && pcm_ops->delay)
683 return pcm_ops->delay(component, substream);
684
685 return 0;
686 }
687
snd_sof_new_platform_drv(struct snd_sof_dev * sdev)688 void snd_sof_new_platform_drv(struct snd_sof_dev *sdev)
689 {
690 struct snd_soc_component_driver *pd = &sdev->plat_drv;
691 struct snd_sof_pdata *plat_data = sdev->pdata;
692 const char *drv_name;
693
694 if (plat_data->machine)
695 drv_name = plat_data->machine->drv_name;
696 else if (plat_data->of_machine)
697 drv_name = plat_data->of_machine->drv_name;
698 else
699 drv_name = NULL;
700
701 pd->name = "sof-audio-component";
702 pd->probe = sof_pcm_probe;
703 pd->remove = sof_pcm_remove;
704 pd->open = sof_pcm_open;
705 pd->close = sof_pcm_close;
706 pd->hw_params = sof_pcm_hw_params;
707 pd->prepare = sof_pcm_prepare;
708 pd->hw_free = sof_pcm_hw_free;
709 pd->trigger = sof_pcm_trigger;
710 pd->pointer = sof_pcm_pointer;
711 pd->ack = sof_pcm_ack;
712 pd->delay = sof_pcm_delay;
713
714 #if IS_ENABLED(CONFIG_SND_SOC_SOF_COMPRESS)
715 pd->compress_ops = &sof_compressed_ops;
716 #endif
717
718 pd->pcm_construct = sof_pcm_new;
719 pd->ignore_machine = drv_name;
720 pd->be_pcm_base = SOF_BE_PCM_BASE;
721 pd->use_dai_pcm_id = true;
722 pd->topology_name_prefix = "sof";
723
724 /* increment module refcount when a pcm is opened */
725 pd->module_get_upon_open = 1;
726
727 pd->legacy_dai_naming = 1;
728
729 /*
730 * The fixup is only needed when the DSP is in use as with the DSPless
731 * mode we are directly using the audio interface
732 */
733 if (!sdev->dspless_mode_selected)
734 pd->be_hw_params_fixup = sof_pcm_dai_link_fixup;
735 }
736