1 // SPDX-License-Identifier: (GPL-2.0 OR BSD-3-Clause)
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.
6 // Copyright(c) 2018 Intel Corporation. All rights reserved.
8 // Author: Liam Girdwood <liam.r.girdwood@linux.intel.com>
10 // PCM Layer, interface between ALSA and IPC.
13 #include <linux/pm_runtime.h>
14 #include <sound/pcm_params.h>
15 #include <sound/sof.h>
19 #define DRV_NAME "sof-audio-component"
21 /* Create DMA buffer page table for DSP */
22 static int create_page_table(struct snd_pcm_substream *substream,
23 unsigned char *dma_area, size_t size)
25 struct snd_soc_pcm_runtime *rtd = substream->private_data;
26 struct snd_soc_component *component =
27 snd_soc_rtdcom_lookup(rtd, DRV_NAME);
28 struct snd_sof_dev *sdev = snd_soc_component_get_drvdata(component);
29 struct snd_sof_pcm *spcm;
30 struct snd_dma_buffer *dmab = snd_pcm_get_dma_buf(substream);
31 int stream = substream->stream;
33 spcm = snd_sof_find_spcm_dai(sdev, rtd);
37 return snd_sof_create_page_table(sdev, dmab,
38 spcm->stream[stream].page_table.area, size);
41 static int sof_pcm_dsp_params(struct snd_sof_pcm *spcm, struct snd_pcm_substream *substream,
42 const struct sof_ipc_pcm_params_reply *reply)
44 struct snd_sof_dev *sdev = spcm->sdev;
46 int ret = snd_sof_ipc_pcm_params(sdev, substream, reply);
49 dev_err(sdev->dev, "error: got wrong reply for PCM %d\n",
56 * sof pcm period elapse work
58 static void sof_pcm_period_elapsed_work(struct work_struct *work)
60 struct snd_sof_pcm_stream *sps =
61 container_of(work, struct snd_sof_pcm_stream,
64 snd_pcm_period_elapsed(sps->substream);
68 * sof pcm period elapse, this could be called at irq thread context.
70 void snd_sof_pcm_period_elapsed(struct snd_pcm_substream *substream)
72 struct snd_soc_pcm_runtime *rtd = substream->private_data;
73 struct snd_soc_component *component =
74 snd_soc_rtdcom_lookup(rtd, DRV_NAME);
75 struct snd_sof_dev *sdev = snd_soc_component_get_drvdata(component);
76 struct snd_sof_pcm *spcm;
78 spcm = snd_sof_find_spcm_dai(sdev, rtd);
81 "error: period elapsed for unknown stream!\n");
86 * snd_pcm_period_elapsed() can be called in interrupt context
87 * before IRQ_HANDLED is returned. Inside snd_pcm_period_elapsed(),
88 * when the PCM is done draining or xrun happened, a STOP IPC will
89 * then be sent and this IPC will hit IPC timeout.
90 * To avoid sending IPC before the previous IPC is handled, we
91 * schedule delayed work here to call the snd_pcm_period_elapsed().
93 schedule_work(&spcm->stream[substream->stream].period_elapsed_work);
95 EXPORT_SYMBOL(snd_sof_pcm_period_elapsed);
97 /* this may get called several times by oss emulation */
98 static int sof_pcm_hw_params(struct snd_pcm_substream *substream,
99 struct snd_pcm_hw_params *params)
101 struct snd_soc_pcm_runtime *rtd = substream->private_data;
102 struct snd_pcm_runtime *runtime = substream->runtime;
103 struct snd_soc_component *component =
104 snd_soc_rtdcom_lookup(rtd, DRV_NAME);
105 struct snd_sof_dev *sdev = snd_soc_component_get_drvdata(component);
106 struct snd_sof_pcm *spcm;
107 struct sof_ipc_pcm_params pcm;
108 struct sof_ipc_pcm_params_reply ipc_params_reply;
111 /* nothing to do for BE */
112 if (rtd->dai_link->no_pcm)
115 spcm = snd_sof_find_spcm_dai(sdev, rtd);
119 dev_dbg(sdev->dev, "pcm: hw params stream %d dir %d\n",
120 spcm->pcm.pcm_id, substream->stream);
122 memset(&pcm, 0, sizeof(pcm));
124 /* allocate audio buffer pages */
125 ret = snd_pcm_lib_malloc_pages(substream, params_buffer_bytes(params));
127 dev_err(sdev->dev, "error: could not allocate %d bytes for PCM %d\n",
128 params_buffer_bytes(params), spcm->pcm.pcm_id);
133 * ret == 1 means the buffer is changed
134 * create compressed page table for audio firmware
135 * ret == 0 means the buffer is not changed
136 * so no need to regenerate the page table
138 ret = create_page_table(substream, runtime->dma_area,
144 /* number of pages should be rounded up */
145 pcm.params.buffer.pages = PFN_UP(runtime->dma_bytes);
147 /* set IPC PCM parameters */
148 pcm.hdr.size = sizeof(pcm);
149 pcm.hdr.cmd = SOF_IPC_GLB_STREAM_MSG | SOF_IPC_STREAM_PCM_PARAMS;
150 pcm.comp_id = spcm->stream[substream->stream].comp_id;
151 pcm.params.hdr.size = sizeof(pcm.params);
152 pcm.params.buffer.phy_addr =
153 spcm->stream[substream->stream].page_table.addr;
154 pcm.params.buffer.size = runtime->dma_bytes;
155 pcm.params.direction = substream->stream;
156 pcm.params.sample_valid_bytes = params_width(params) >> 3;
157 pcm.params.buffer_fmt = SOF_IPC_BUFFER_INTERLEAVED;
158 pcm.params.rate = params_rate(params);
159 pcm.params.channels = params_channels(params);
160 pcm.params.host_period_bytes = params_period_bytes(params);
163 ret = snd_pcm_format_physical_width(params_format(params));
166 pcm.params.sample_container_bytes = ret >> 3;
169 switch (params_format(params)) {
170 case SNDRV_PCM_FORMAT_S16:
171 pcm.params.frame_fmt = SOF_IPC_FRAME_S16_LE;
173 case SNDRV_PCM_FORMAT_S24:
174 pcm.params.frame_fmt = SOF_IPC_FRAME_S24_4LE;
176 case SNDRV_PCM_FORMAT_S32:
177 pcm.params.frame_fmt = SOF_IPC_FRAME_S32_LE;
179 case SNDRV_PCM_FORMAT_FLOAT:
180 pcm.params.frame_fmt = SOF_IPC_FRAME_FLOAT;
186 /* firmware already configured host stream */
187 ret = snd_sof_pcm_platform_hw_params(sdev,
192 dev_err(sdev->dev, "error: platform hw params failed\n");
196 dev_dbg(sdev->dev, "stream_tag %d", pcm.params.stream_tag);
198 /* send IPC to the DSP */
199 ret = sof_ipc_tx_message(sdev->ipc, pcm.hdr.cmd, &pcm, sizeof(pcm),
200 &ipc_params_reply, sizeof(ipc_params_reply));
202 dev_err(sdev->dev, "error: hw params ipc failed for stream %d\n",
203 pcm.params.stream_tag);
207 ret = sof_pcm_dsp_params(spcm, substream, &ipc_params_reply);
211 /* save pcm hw_params */
212 memcpy(&spcm->params[substream->stream], params, sizeof(*params));
214 INIT_WORK(&spcm->stream[substream->stream].period_elapsed_work,
215 sof_pcm_period_elapsed_work);
220 static int sof_pcm_hw_free(struct snd_pcm_substream *substream)
222 struct snd_soc_pcm_runtime *rtd = substream->private_data;
223 struct snd_soc_component *component =
224 snd_soc_rtdcom_lookup(rtd, DRV_NAME);
225 struct snd_sof_dev *sdev = snd_soc_component_get_drvdata(component);
226 struct snd_sof_pcm *spcm;
227 struct sof_ipc_stream stream;
228 struct sof_ipc_reply reply;
231 /* nothing to do for BE */
232 if (rtd->dai_link->no_pcm)
235 spcm = snd_sof_find_spcm_dai(sdev, rtd);
239 dev_dbg(sdev->dev, "pcm: free stream %d dir %d\n", spcm->pcm.pcm_id,
242 stream.hdr.size = sizeof(stream);
243 stream.hdr.cmd = SOF_IPC_GLB_STREAM_MSG | SOF_IPC_STREAM_PCM_FREE;
244 stream.comp_id = spcm->stream[substream->stream].comp_id;
246 /* send IPC to the DSP */
247 ret = sof_ipc_tx_message(sdev->ipc, stream.hdr.cmd, &stream,
248 sizeof(stream), &reply, sizeof(reply));
250 snd_pcm_lib_free_pages(substream);
252 cancel_work_sync(&spcm->stream[substream->stream].period_elapsed_work);
257 static int sof_pcm_prepare(struct snd_pcm_substream *substream)
259 struct snd_soc_pcm_runtime *rtd = substream->private_data;
260 struct snd_soc_component *component =
261 snd_soc_rtdcom_lookup(rtd, DRV_NAME);
262 struct snd_sof_dev *sdev = snd_soc_component_get_drvdata(component);
263 struct snd_sof_pcm *spcm;
266 /* nothing to do for BE */
267 if (rtd->dai_link->no_pcm)
270 spcm = snd_sof_find_spcm_dai(sdev, rtd);
275 * check if hw_params needs to be set-up again.
276 * This is only needed when resuming from system sleep.
278 if (!spcm->hw_params_upon_resume[substream->stream])
281 dev_dbg(sdev->dev, "pcm: prepare stream %d dir %d\n", spcm->pcm.pcm_id,
285 ret = sof_pcm_hw_params(substream, &spcm->params[substream->stream]);
287 dev_err(sdev->dev, "error: set pcm hw_params after resume\n");
295 * FE dai link trigger actions are always executed in non-atomic context because
296 * they involve IPC's.
298 static int sof_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
300 struct snd_soc_pcm_runtime *rtd = substream->private_data;
301 struct snd_soc_component *component =
302 snd_soc_rtdcom_lookup(rtd, DRV_NAME);
303 struct snd_sof_dev *sdev = snd_soc_component_get_drvdata(component);
304 struct snd_sof_pcm *spcm;
305 struct sof_ipc_stream stream;
306 struct sof_ipc_reply reply;
309 /* nothing to do for BE */
310 if (rtd->dai_link->no_pcm)
313 spcm = snd_sof_find_spcm_dai(sdev, rtd);
317 dev_dbg(sdev->dev, "pcm: trigger stream %d dir %d cmd %d\n",
318 spcm->pcm.pcm_id, substream->stream, cmd);
320 stream.hdr.size = sizeof(stream);
321 stream.hdr.cmd = SOF_IPC_GLB_STREAM_MSG;
322 stream.comp_id = spcm->stream[substream->stream].comp_id;
325 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
326 stream.hdr.cmd |= SOF_IPC_STREAM_TRIG_PAUSE;
328 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
329 stream.hdr.cmd |= SOF_IPC_STREAM_TRIG_RELEASE;
331 case SNDRV_PCM_TRIGGER_RESUME:
332 /* set up hw_params */
333 ret = sof_pcm_prepare(substream);
336 "error: failed to set up hw_params upon resume\n");
341 case SNDRV_PCM_TRIGGER_START:
342 stream.hdr.cmd |= SOF_IPC_STREAM_TRIG_START;
344 case SNDRV_PCM_TRIGGER_SUSPEND:
345 case SNDRV_PCM_TRIGGER_STOP:
346 stream.hdr.cmd |= SOF_IPC_STREAM_TRIG_STOP;
349 dev_err(sdev->dev, "error: unhandled trigger cmd %d\n", cmd);
353 snd_sof_pcm_platform_trigger(sdev, substream, cmd);
355 /* send IPC to the DSP */
356 ret = sof_ipc_tx_message(sdev->ipc, stream.hdr.cmd, &stream,
357 sizeof(stream), &reply, sizeof(reply));
359 if (ret < 0 || cmd != SNDRV_PCM_TRIGGER_SUSPEND)
363 * The hw_free op is usually called when the pcm stream is closed.
364 * Since the stream is not closed during suspend, the DSP needs to be
365 * notified explicitly to free pcm to prevent errors upon resume.
367 stream.hdr.size = sizeof(stream);
368 stream.hdr.cmd = SOF_IPC_GLB_STREAM_MSG | SOF_IPC_STREAM_PCM_FREE;
369 stream.comp_id = spcm->stream[substream->stream].comp_id;
371 /* send IPC to the DSP */
372 return sof_ipc_tx_message(sdev->ipc, stream.hdr.cmd, &stream,
373 sizeof(stream), &reply, sizeof(reply));
376 static snd_pcm_uframes_t sof_pcm_pointer(struct snd_pcm_substream *substream)
378 struct snd_soc_pcm_runtime *rtd = substream->private_data;
379 struct snd_soc_component *component =
380 snd_soc_rtdcom_lookup(rtd, DRV_NAME);
381 struct snd_sof_dev *sdev = snd_soc_component_get_drvdata(component);
382 struct snd_sof_pcm *spcm;
383 snd_pcm_uframes_t host, dai;
385 /* nothing to do for BE */
386 if (rtd->dai_link->no_pcm)
389 /* use dsp ops pointer callback directly if set */
390 if (sof_ops(sdev)->pcm_pointer)
391 return sof_ops(sdev)->pcm_pointer(sdev, substream);
393 spcm = snd_sof_find_spcm_dai(sdev, rtd);
397 /* read position from DSP */
398 host = bytes_to_frames(substream->runtime,
399 spcm->stream[substream->stream].posn.host_posn);
400 dai = bytes_to_frames(substream->runtime,
401 spcm->stream[substream->stream].posn.dai_posn);
403 dev_dbg(sdev->dev, "PCM: stream %d dir %d DMA position %lu DAI position %lu\n",
404 spcm->pcm.pcm_id, substream->stream, host, dai);
409 static int sof_pcm_open(struct snd_pcm_substream *substream)
411 struct snd_soc_pcm_runtime *rtd = substream->private_data;
412 struct snd_pcm_runtime *runtime = substream->runtime;
413 struct snd_soc_component *component =
414 snd_soc_rtdcom_lookup(rtd, DRV_NAME);
415 struct snd_sof_dev *sdev = snd_soc_component_get_drvdata(component);
416 struct snd_sof_pcm *spcm;
417 struct snd_soc_tplg_stream_caps *caps;
421 /* nothing to do for BE */
422 if (rtd->dai_link->no_pcm)
425 spcm = snd_sof_find_spcm_dai(sdev, rtd);
429 dev_dbg(sdev->dev, "pcm: open stream %d dir %d\n", spcm->pcm.pcm_id,
432 /* clear hw_params_upon_resume flag */
433 spcm->hw_params_upon_resume[substream->stream] = 0;
435 caps = &spcm->pcm.caps[substream->stream];
437 ret = pm_runtime_get_sync(sdev->dev);
439 dev_err(sdev->dev, "error: pcm open failed to resume %d\n",
441 pm_runtime_put_noidle(sdev->dev);
445 /* set any runtime constraints based on topology */
446 snd_pcm_hw_constraint_step(substream->runtime, 0,
447 SNDRV_PCM_HW_PARAM_BUFFER_BYTES,
448 le32_to_cpu(caps->period_size_min));
449 snd_pcm_hw_constraint_step(substream->runtime, 0,
450 SNDRV_PCM_HW_PARAM_PERIOD_BYTES,
451 le32_to_cpu(caps->period_size_min));
453 /* set runtime config */
454 runtime->hw.info = SNDRV_PCM_INFO_MMAP |
455 SNDRV_PCM_INFO_MMAP_VALID |
456 SNDRV_PCM_INFO_INTERLEAVED |
457 SNDRV_PCM_INFO_PAUSE |
458 SNDRV_PCM_INFO_NO_PERIOD_WAKEUP;
459 runtime->hw.formats = le64_to_cpu(caps->formats);
460 runtime->hw.period_bytes_min = le32_to_cpu(caps->period_size_min);
461 runtime->hw.period_bytes_max = le32_to_cpu(caps->period_size_max);
462 runtime->hw.periods_min = le32_to_cpu(caps->periods_min);
463 runtime->hw.periods_max = le32_to_cpu(caps->periods_max);
466 * caps->buffer_size_min is not used since the
467 * snd_pcm_hardware structure only defines buffer_bytes_max
469 runtime->hw.buffer_bytes_max = le32_to_cpu(caps->buffer_size_max);
471 dev_dbg(sdev->dev, "period min %zd max %zd bytes\n",
472 runtime->hw.period_bytes_min,
473 runtime->hw.period_bytes_max);
474 dev_dbg(sdev->dev, "period count %d max %d\n",
475 runtime->hw.periods_min,
476 runtime->hw.periods_max);
477 dev_dbg(sdev->dev, "buffer max %zd bytes\n",
478 runtime->hw.buffer_bytes_max);
480 /* set wait time - TODO: come from topology */
481 substream->wait_time = 500;
483 spcm->stream[substream->stream].posn.host_posn = 0;
484 spcm->stream[substream->stream].posn.dai_posn = 0;
485 spcm->stream[substream->stream].substream = substream;
487 ret = snd_sof_pcm_platform_open(sdev, substream);
489 dev_err(sdev->dev, "error: pcm open failed %d\n",
492 pm_runtime_mark_last_busy(sdev->dev);
494 err = pm_runtime_put_autosuspend(sdev->dev);
496 dev_err(sdev->dev, "error: pcm close failed to idle %d\n",
503 static int sof_pcm_close(struct snd_pcm_substream *substream)
505 struct snd_soc_pcm_runtime *rtd = substream->private_data;
506 struct snd_soc_component *component =
507 snd_soc_rtdcom_lookup(rtd, DRV_NAME);
508 struct snd_sof_dev *sdev = snd_soc_component_get_drvdata(component);
509 struct snd_sof_pcm *spcm;
512 /* nothing to do for BE */
513 if (rtd->dai_link->no_pcm)
516 spcm = snd_sof_find_spcm_dai(sdev, rtd);
520 dev_dbg(sdev->dev, "pcm: close stream %d dir %d\n", spcm->pcm.pcm_id,
523 err = snd_sof_pcm_platform_close(sdev, substream);
525 dev_err(sdev->dev, "error: pcm close failed %d\n",
528 * keep going, no point in preventing the close
533 pm_runtime_mark_last_busy(sdev->dev);
535 err = pm_runtime_put_autosuspend(sdev->dev);
537 dev_err(sdev->dev, "error: pcm close failed to idle %d\n",
543 static struct snd_pcm_ops sof_pcm_ops = {
544 .open = sof_pcm_open,
545 .close = sof_pcm_close,
546 .ioctl = snd_pcm_lib_ioctl,
547 .hw_params = sof_pcm_hw_params,
548 .prepare = sof_pcm_prepare,
549 .hw_free = sof_pcm_hw_free,
550 .trigger = sof_pcm_trigger,
551 .pointer = sof_pcm_pointer,
552 .page = snd_pcm_sgbuf_ops_page,
556 * Pre-allocate playback/capture audio buffer pages.
557 * no need to explicitly release memory preallocated by sof_pcm_new in pcm_free
558 * snd_pcm_lib_preallocate_free_for_all() is called by the core.
560 static int sof_pcm_new(struct snd_soc_pcm_runtime *rtd)
562 struct snd_soc_component *component =
563 snd_soc_rtdcom_lookup(rtd, DRV_NAME);
564 struct snd_sof_dev *sdev = snd_soc_component_get_drvdata(component);
565 struct snd_sof_pcm *spcm;
566 struct snd_pcm *pcm = rtd->pcm;
567 struct snd_soc_tplg_stream_caps *caps;
568 int stream = SNDRV_PCM_STREAM_PLAYBACK;
570 /* find SOF PCM for this RTD */
571 spcm = snd_sof_find_spcm_dai(sdev, rtd);
573 dev_warn(sdev->dev, "warn: can't find PCM with DAI ID %d\n",
578 dev_dbg(sdev->dev, "creating new PCM %s\n", spcm->pcm.pcm_name);
580 /* do we need to pre-allocate playback audio buffer pages */
581 if (!spcm->pcm.playback)
584 caps = &spcm->pcm.caps[stream];
586 /* pre-allocate playback audio buffer pages */
587 dev_dbg(sdev->dev, "spcm: allocate %s playback DMA buffer size 0x%x max 0x%x\n",
588 caps->name, caps->buffer_size_min, caps->buffer_size_max);
590 snd_pcm_lib_preallocate_pages(pcm->streams[stream].substream,
591 SNDRV_DMA_TYPE_DEV_SG, sdev->dev,
592 le32_to_cpu(caps->buffer_size_min),
593 le32_to_cpu(caps->buffer_size_max));
595 stream = SNDRV_PCM_STREAM_CAPTURE;
597 /* do we need to pre-allocate capture audio buffer pages */
598 if (!spcm->pcm.capture)
601 caps = &spcm->pcm.caps[stream];
603 /* pre-allocate capture audio buffer pages */
604 dev_dbg(sdev->dev, "spcm: allocate %s capture DMA buffer size 0x%x max 0x%x\n",
605 caps->name, caps->buffer_size_min, caps->buffer_size_max);
607 snd_pcm_lib_preallocate_pages(pcm->streams[stream].substream,
608 SNDRV_DMA_TYPE_DEV_SG, sdev->dev,
609 le32_to_cpu(caps->buffer_size_min),
610 le32_to_cpu(caps->buffer_size_max));
615 /* fixup the BE DAI link to match any values from topology */
616 static int sof_pcm_dai_link_fixup(struct snd_soc_pcm_runtime *rtd,
617 struct snd_pcm_hw_params *params)
619 struct snd_interval *rate = hw_param_interval(params,
620 SNDRV_PCM_HW_PARAM_RATE);
621 struct snd_interval *channels = hw_param_interval(params,
622 SNDRV_PCM_HW_PARAM_CHANNELS);
623 struct snd_mask *fmt = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT);
624 struct snd_soc_component *component =
625 snd_soc_rtdcom_lookup(rtd, DRV_NAME);
626 struct snd_sof_dev *sdev = snd_soc_component_get_drvdata(component);
627 struct snd_sof_dai *dai =
628 snd_sof_find_dai(sdev, (char *)rtd->dai_link->name);
630 /* no topology exists for this BE, try a common configuration */
632 dev_warn(sdev->dev, "warning: no topology found for BE DAI %s config\n",
633 rtd->dai_link->name);
635 /* set 48k, stereo, 16bits by default */
643 snd_mask_set_format(fmt, SNDRV_PCM_FORMAT_S16_LE);
648 /* read format from topology */
651 switch (dai->comp_dai.config.frame_fmt) {
652 case SOF_IPC_FRAME_S16_LE:
653 snd_mask_set_format(fmt, SNDRV_PCM_FORMAT_S16_LE);
655 case SOF_IPC_FRAME_S24_4LE:
656 snd_mask_set_format(fmt, SNDRV_PCM_FORMAT_S24_LE);
658 case SOF_IPC_FRAME_S32_LE:
659 snd_mask_set_format(fmt, SNDRV_PCM_FORMAT_S32_LE);
662 dev_err(sdev->dev, "error: No available DAI format!\n");
666 /* read rate and channels from topology */
667 switch (dai->dai_config->type) {
668 case SOF_DAI_INTEL_SSP:
669 rate->min = dai->dai_config->ssp.fsync_rate;
670 rate->max = dai->dai_config->ssp.fsync_rate;
671 channels->min = dai->dai_config->ssp.tdm_slots;
672 channels->max = dai->dai_config->ssp.tdm_slots;
675 "rate_min: %d rate_max: %d\n", rate->min, rate->max);
677 "channels_min: %d channels_max: %d\n",
678 channels->min, channels->max);
681 case SOF_DAI_INTEL_DMIC:
682 /* DMIC only supports 16 or 32 bit formats */
683 if (dai->comp_dai.config.frame_fmt == SOF_IPC_FRAME_S24_4LE) {
685 "error: invalid fmt %d for DAI type %d\n",
686 dai->comp_dai.config.frame_fmt,
687 dai->dai_config->type);
690 case SOF_DAI_INTEL_HDA:
691 /* do nothing for HDA dai_link */
694 dev_err(sdev->dev, "error: invalid DAI type %d\n",
695 dai->dai_config->type);
702 static int sof_pcm_probe(struct snd_soc_component *component)
704 struct snd_sof_dev *sdev = snd_soc_component_get_drvdata(component);
705 struct snd_sof_pdata *plat_data = sdev->pdata;
706 const char *tplg_filename;
709 /* load the default topology */
710 sdev->component = component;
712 tplg_filename = devm_kasprintf(sdev->dev, GFP_KERNEL,
714 plat_data->tplg_filename_prefix,
715 plat_data->tplg_filename);
719 ret = snd_sof_load_topology(sdev, tplg_filename);
721 dev_err(sdev->dev, "error: failed to load DSP topology %d\n",
727 * Some platforms in SOF, ex: BYT, may not have their platform PM
728 * callbacks set. Increment the usage count so as to
729 * prevent the device from entering runtime suspend.
731 if (!sof_ops(sdev)->runtime_suspend || !sof_ops(sdev)->runtime_resume)
732 pm_runtime_get_noresume(sdev->dev);
737 static void sof_pcm_remove(struct snd_soc_component *component)
739 /* remove topology */
740 snd_soc_tplg_component_remove(component, SND_SOC_TPLG_INDEX_ALL);
743 void snd_sof_new_platform_drv(struct snd_sof_dev *sdev)
745 struct snd_soc_component_driver *pd = &sdev->plat_drv;
746 struct snd_sof_pdata *plat_data = sdev->pdata;
747 const char *drv_name;
749 drv_name = plat_data->machine->drv_name;
751 pd->name = "sof-audio-component";
752 pd->probe = sof_pcm_probe;
753 pd->remove = sof_pcm_remove;
754 pd->ops = &sof_pcm_ops;
755 #if IS_ENABLED(CONFIG_SND_SOC_SOF_COMPRESS)
756 pd->compr_ops = &sof_compressed_ops;
758 pd->pcm_new = sof_pcm_new;
759 pd->ignore_machine = drv_name;
760 pd->be_hw_params_fixup = sof_pcm_dai_link_fixup;
761 pd->be_pcm_base = SOF_BE_PCM_BASE;
762 pd->use_dai_pcm_id = true;
763 pd->topology_name_prefix = "sof";
765 /* increment module refcount when a pcm is opened */
766 pd->module_get_upon_open = 1;