ASoC: SOF: Add PCM operations support

// SPDX-License-Identifier: (GPL-2.0 OR BSD-3-Clause)

//

// This file is provided under a dual BSD/GPLv2 license.  When using or

// redistributing this file, you may do so under either license.

//

// Copyright(c) 2018 Intel Corporation. All rights reserved.

//

// Author: Liam Girdwood <liam.r.girdwood@linux.intel.com>

//

// PCM Layer, interface between ALSA and IPC.

//

#include <linux/pm_runtime.h>

#include <sound/pcm_params.h>

#include <sound/sof.h>

#include "sof-priv.h"

#include "ops.h"

#define DRV_NAME	"sof-audio-component"

/* Create DMA buffer page table for DSP */

static int create_page_table(struct snd_pcm_substream *substream,

			     unsigned char *dma_area, size_t size)

{

	struct snd_soc_pcm_runtime *rtd = substream->private_data;

	struct snd_soc_component *component =

		snd_soc_rtdcom_lookup(rtd, DRV_NAME);

	struct snd_sof_dev *sdev = snd_soc_component_get_drvdata(component);

	struct snd_sof_pcm *spcm;

	struct snd_dma_buffer *dmab = snd_pcm_get_dma_buf(substream);

	int stream = substream->stream;

	spcm = snd_sof_find_spcm_dai(sdev, rtd);

	if (!spcm)

		return -EINVAL;

	return snd_sof_create_page_table(sdev, dmab,

		spcm->stream[stream].page_table.area, size);

}

static int sof_pcm_dsp_params(struct snd_sof_pcm *spcm, struct snd_pcm_substream *substream,

			      const struct sof_ipc_pcm_params_reply *reply)

{

	struct snd_sof_dev *sdev = spcm->sdev;

	/* validate offset */

	int ret = snd_sof_ipc_pcm_params(sdev, substream, reply);

	if (ret < 0)

		dev_err(sdev->dev, "error: got wrong reply for PCM %d\n",

			spcm->pcm.pcm_id);

	return ret;

}

/* this may get called several times by oss emulation */

static int sof_pcm_hw_params(struct snd_pcm_substream *substream,

			     struct snd_pcm_hw_params *params)

{

	struct snd_soc_pcm_runtime *rtd = substream->private_data;

	struct snd_pcm_runtime *runtime = substream->runtime;

	struct snd_soc_component *component =

		snd_soc_rtdcom_lookup(rtd, DRV_NAME);

	struct snd_sof_dev *sdev = snd_soc_component_get_drvdata(component);

	struct snd_sof_pcm *spcm;

	struct sof_ipc_pcm_params pcm;

	struct sof_ipc_pcm_params_reply ipc_params_reply;

	int ret;

	/* nothing to do for BE */

	if (rtd->dai_link->no_pcm)

		return 0;

	spcm = snd_sof_find_spcm_dai(sdev, rtd);

	if (!spcm)

		return -EINVAL;

	dev_dbg(sdev->dev, "pcm: hw params stream %d dir %d\n",

		spcm->pcm.pcm_id, substream->stream);

	memset(&pcm, 0, sizeof(pcm));

	/* allocate audio buffer pages */

	ret = snd_pcm_lib_malloc_pages(substream, params_buffer_bytes(params));

	if (ret < 0) {

		dev_err(sdev->dev, "error: could not allocate %d bytes for PCM %d\n",

			params_buffer_bytes(params), spcm->pcm.pcm_id);

		return ret;

	}

	if (ret) {

		/*

		 * ret == 1 means the buffer is changed

		 * create compressed page table for audio firmware

		 * ret == 0 means the buffer is not changed

		 * so no need to regenerate the page table

		 */

		ret = create_page_table(substream, runtime->dma_area,

					runtime->dma_bytes);

		if (ret < 0)

			return ret;

	}

	/* number of pages should be rounded up */

	pcm.params.buffer.pages = PFN_UP(runtime->dma_bytes);

	/* set IPC PCM parameters */

	pcm.hdr.size = sizeof(pcm);

	pcm.hdr.cmd = SOF_IPC_GLB_STREAM_MSG | SOF_IPC_STREAM_PCM_PARAMS;

	pcm.comp_id = spcm->stream[substream->stream].comp_id;

	pcm.params.hdr.size = sizeof(pcm.params);

	pcm.params.buffer.phy_addr =

		spcm->stream[substream->stream].page_table.addr;

	pcm.params.buffer.size = runtime->dma_bytes;

	pcm.params.direction = substream->stream;

	pcm.params.sample_valid_bytes = params_width(params) >> 3;

	pcm.params.buffer_fmt = SOF_IPC_BUFFER_INTERLEAVED;

	pcm.params.rate = params_rate(params);

	pcm.params.channels = params_channels(params);

	pcm.params.host_period_bytes = params_period_bytes(params);

	/* container size */

	ret = snd_pcm_format_physical_width(params_format(params));

	if (ret < 0)

		return ret;

	pcm.params.sample_container_bytes = ret >> 3;

	/* format */

	switch (params_format(params)) {

	case SNDRV_PCM_FORMAT_S16:

		pcm.params.frame_fmt = SOF_IPC_FRAME_S16_LE;

		break;

	case SNDRV_PCM_FORMAT_S24:

		pcm.params.frame_fmt = SOF_IPC_FRAME_S24_4LE;

		break;

	case SNDRV_PCM_FORMAT_S32:

		pcm.params.frame_fmt = SOF_IPC_FRAME_S32_LE;

		break;

	case SNDRV_PCM_FORMAT_FLOAT:

		pcm.params.frame_fmt = SOF_IPC_FRAME_FLOAT;

		break;

	default:

		return -EINVAL;

	}

	/* firmware already configured host stream */

	ret = snd_sof_pcm_platform_hw_params(sdev,

					     substream,

					     params,

					     &pcm.params);

	if (ret < 0) {

		dev_err(sdev->dev, "error: platform hw params failed\n");

		return ret;

	}

	dev_dbg(sdev->dev, "stream_tag %d", pcm.params.stream_tag);

	/* send IPC to the DSP */

	ret = sof_ipc_tx_message(sdev->ipc, pcm.hdr.cmd, &pcm, sizeof(pcm),

				 &ipc_params_reply, sizeof(ipc_params_reply));

	if (ret < 0) {

		dev_err(sdev->dev, "error: hw params ipc failed for stream %d\n",

			pcm.params.stream_tag);

		return ret;

	}

	ret = sof_pcm_dsp_params(spcm, substream, &ipc_params_reply);

	if (ret < 0)

		return ret;

	/* save pcm hw_params */

	memcpy(&spcm->params[substream->stream], params, sizeof(*params));

	return ret;

}

static int sof_pcm_hw_free(struct snd_pcm_substream *substream)

{

	struct snd_soc_pcm_runtime *rtd = substream->private_data;

	struct snd_soc_component *component =

		snd_soc_rtdcom_lookup(rtd, DRV_NAME);

	struct snd_sof_dev *sdev = snd_soc_component_get_drvdata(component);

	struct snd_sof_pcm *spcm;

	struct sof_ipc_stream stream;

	struct sof_ipc_reply reply;

	int ret;

	/* nothing to do for BE */

	if (rtd->dai_link->no_pcm)

		return 0;

	spcm = snd_sof_find_spcm_dai(sdev, rtd);

	if (!spcm)

		return -EINVAL;

	dev_dbg(sdev->dev, "pcm: free stream %d dir %d\n", spcm->pcm.pcm_id,

		substream->stream);

	stream.hdr.size = sizeof(stream);

	stream.hdr.cmd = SOF_IPC_GLB_STREAM_MSG | SOF_IPC_STREAM_PCM_FREE;

	stream.comp_id = spcm->stream[substream->stream].comp_id;

	/* send IPC to the DSP */

	ret = sof_ipc_tx_message(sdev->ipc, stream.hdr.cmd, &stream,

				 sizeof(stream), &reply, sizeof(reply));

	snd_pcm_lib_free_pages(substream);

	return ret;

}

static int sof_pcm_prepare(struct snd_pcm_substream *substream)

{

	struct snd_soc_pcm_runtime *rtd = substream->private_data;

	struct snd_soc_component *component =

		snd_soc_rtdcom_lookup(rtd, DRV_NAME);

	struct snd_sof_dev *sdev = snd_soc_component_get_drvdata(component);

	struct snd_sof_pcm *spcm;

	int ret;

	/* nothing to do for BE */

	if (rtd->dai_link->no_pcm)

		return 0;

	spcm = snd_sof_find_spcm_dai(sdev, rtd);

	if (!spcm)

		return -EINVAL;

	/*

	 * check if hw_params needs to be set-up again.

	 * This is only needed when resuming from system sleep.

	 */

	if (!spcm->hw_params_upon_resume[substream->stream])

		return 0;

	dev_dbg(sdev->dev, "pcm: prepare stream %d dir %d\n", spcm->pcm.pcm_id,

		substream->stream);

	/* set hw_params */

	ret = sof_pcm_hw_params(substream, &spcm->params[substream->stream]);

	if (ret < 0) {

		dev_err(sdev->dev, "error: set pcm hw_params after resume\n");

		return ret;

	}

	return 0;

}

/*

 * FE dai link trigger actions are always executed in non-atomic context because

 * they involve IPC's.

 */

static int sof_pcm_trigger(struct snd_pcm_substream *substream, int cmd)

{

	struct snd_soc_pcm_runtime *rtd = substream->private_data;

	struct snd_soc_component *component =

		snd_soc_rtdcom_lookup(rtd, DRV_NAME);

	struct snd_sof_dev *sdev = snd_soc_component_get_drvdata(component);

	struct snd_sof_pcm *spcm;

	struct sof_ipc_stream stream;

	struct sof_ipc_reply reply;

	int ret;

	/* nothing to do for BE */

	if (rtd->dai_link->no_pcm)

		return 0;

	spcm = snd_sof_find_spcm_dai(sdev, rtd);

	if (!spcm)

		return -EINVAL;

	dev_dbg(sdev->dev, "pcm: trigger stream %d dir %d cmd %d\n",

		spcm->pcm.pcm_id, substream->stream, cmd);

	stream.hdr.size = sizeof(stream);

	stream.hdr.cmd = SOF_IPC_GLB_STREAM_MSG;

	stream.comp_id = spcm->stream[substream->stream].comp_id;

	switch (cmd) {

	case SNDRV_PCM_TRIGGER_PAUSE_PUSH:

		stream.hdr.cmd |= SOF_IPC_STREAM_TRIG_PAUSE;

		break;

	case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:

		stream.hdr.cmd |= SOF_IPC_STREAM_TRIG_RELEASE;

		break;

	case SNDRV_PCM_TRIGGER_RESUME:

		/* set up hw_params */

		ret = sof_pcm_prepare(substream);

		if (ret < 0) {

			dev_err(sdev->dev,

				"error: failed to set up hw_params upon resume\n");

			return ret;

		}

		/* fallthrough */

	case SNDRV_PCM_TRIGGER_START:

		stream.hdr.cmd |= SOF_IPC_STREAM_TRIG_START;

		break;

	case SNDRV_PCM_TRIGGER_SUSPEND:

	case SNDRV_PCM_TRIGGER_STOP:

		stream.hdr.cmd |= SOF_IPC_STREAM_TRIG_STOP;

		break;

	default:

		dev_err(sdev->dev, "error: unhandled trigger cmd %d\n", cmd);

		return -EINVAL;

	}

	snd_sof_pcm_platform_trigger(sdev, substream, cmd);

	/* send IPC to the DSP */

	ret = sof_ipc_tx_message(sdev->ipc, stream.hdr.cmd, &stream,

				 sizeof(stream), &reply, sizeof(reply));

	if (ret < 0 || cmd != SNDRV_PCM_TRIGGER_SUSPEND)

		return ret;

	/*

	 * The hw_free op is usually called when the pcm stream is closed.

	 * Since the stream is not closed during suspend, the DSP needs to be

	 * notified explicitly to free pcm to prevent errors upon resume.

	 */

	stream.hdr.size = sizeof(stream);

	stream.hdr.cmd = SOF_IPC_GLB_STREAM_MSG | SOF_IPC_STREAM_PCM_FREE;

	stream.comp_id = spcm->stream[substream->stream].comp_id;

	/* send IPC to the DSP */

	return sof_ipc_tx_message(sdev->ipc, stream.hdr.cmd, &stream,

				  sizeof(stream), &reply, sizeof(reply));

}

static snd_pcm_uframes_t sof_pcm_pointer(struct snd_pcm_substream *substream)

{

	struct snd_soc_pcm_runtime *rtd = substream->private_data;

	struct snd_soc_component *component =

		snd_soc_rtdcom_lookup(rtd, DRV_NAME);

	struct snd_sof_dev *sdev = snd_soc_component_get_drvdata(component);

	struct snd_sof_pcm *spcm;

	snd_pcm_uframes_t host, dai;

	/* nothing to do for BE */

	if (rtd->dai_link->no_pcm)

		return 0;

	/* use dsp ops pointer callback directly if set */

	if (sof_ops(sdev)->pcm_pointer)

		return sof_ops(sdev)->pcm_pointer(sdev, substream);

	spcm = snd_sof_find_spcm_dai(sdev, rtd);

	if (!spcm)

		return -EINVAL;

	/* read position from DSP */

	host = bytes_to_frames(substream->runtime,

			       spcm->stream[substream->stream].posn.host_posn);

	dai = bytes_to_frames(substream->runtime,

			      spcm->stream[substream->stream].posn.dai_posn);

	dev_dbg(sdev->dev, "PCM: stream %d dir %d DMA position %lu DAI position %lu\n",

		spcm->pcm.pcm_id, substream->stream, host, dai);

	return host;

}

static int sof_pcm_open(struct snd_pcm_substream *substream)

{

	struct snd_soc_pcm_runtime *rtd = substream->private_data;

	struct snd_pcm_runtime *runtime = substream->runtime;

	struct snd_soc_component *component =

		snd_soc_rtdcom_lookup(rtd, DRV_NAME);

	struct snd_sof_dev *sdev = snd_soc_component_get_drvdata(component);

	struct snd_sof_pcm *spcm;

	struct snd_soc_tplg_stream_caps *caps;

	int ret;

	int err;

	/* nothing to do for BE */

	if (rtd->dai_link->no_pcm)

		return 0;

	spcm = snd_sof_find_spcm_dai(sdev, rtd);

	if (!spcm)

		return -EINVAL;

	dev_dbg(sdev->dev, "pcm: open stream %d dir %d\n", spcm->pcm.pcm_id,

		substream->stream);

	/* clear hw_params_upon_resume flag */

	spcm->hw_params_upon_resume[substream->stream] = 0;

	caps = &spcm->pcm.caps[substream->stream];

	ret = pm_runtime_get_sync(sdev->dev);

	if (ret < 0) {

		dev_err(sdev->dev, "error: pcm open failed to resume %d\n",

			ret);

		pm_runtime_put_noidle(sdev->dev);

		return ret;

	}

	/* set any runtime constraints based on topology */

	snd_pcm_hw_constraint_step(substream->runtime, 0,

				   SNDRV_PCM_HW_PARAM_BUFFER_BYTES,

				   le32_to_cpu(caps->period_size_min));

	snd_pcm_hw_constraint_step(substream->runtime, 0,

				   SNDRV_PCM_HW_PARAM_PERIOD_BYTES,

				   le32_to_cpu(caps->period_size_min));

	/* set runtime config */

	runtime->hw.info = SNDRV_PCM_INFO_MMAP |

			  SNDRV_PCM_INFO_MMAP_VALID |

			  SNDRV_PCM_INFO_INTERLEAVED |

			  SNDRV_PCM_INFO_PAUSE |

			  SNDRV_PCM_INFO_NO_PERIOD_WAKEUP;

	runtime->hw.formats = le64_to_cpu(caps->formats);

	runtime->hw.period_bytes_min = le32_to_cpu(caps->period_size_min);

	runtime->hw.period_bytes_max = le32_to_cpu(caps->period_size_max);

	runtime->hw.periods_min = le32_to_cpu(caps->periods_min);

	runtime->hw.periods_max = le32_to_cpu(caps->periods_max);

	/*

	 * caps->buffer_size_min is not used since the

	 * snd_pcm_hardware structure only defines buffer_bytes_max

	 */

	runtime->hw.buffer_bytes_max = le32_to_cpu(caps->buffer_size_max);

	dev_dbg(sdev->dev, "period min %zd max %zd bytes\n",

		runtime->hw.period_bytes_min,

		runtime->hw.period_bytes_max);

	dev_dbg(sdev->dev, "period count %d max %d\n",

		runtime->hw.periods_min,

		runtime->hw.periods_max);

	dev_dbg(sdev->dev, "buffer max %zd bytes\n",

		runtime->hw.buffer_bytes_max);

	/* set wait time - TODO: come from topology */

	substream->wait_time = 500;

	spcm->stream[substream->stream].posn.host_posn = 0;

	spcm->stream[substream->stream].posn.dai_posn = 0;

	spcm->stream[substream->stream].substream = substream;

	ret = snd_sof_pcm_platform_open(sdev, substream);

	if (ret < 0) {

		dev_err(sdev->dev, "error: pcm open failed %d\n",

			ret);

		pm_runtime_mark_last_busy(sdev->dev);

		err = pm_runtime_put_autosuspend(sdev->dev);

		if (err < 0)

			dev_err(sdev->dev, "error: pcm close failed to idle %d\n",

				err);

	}

	return ret;

}

static int sof_pcm_close(struct snd_pcm_substream *substream)

{

	struct snd_soc_pcm_runtime *rtd = substream->private_data;

	struct snd_soc_component *component =

		snd_soc_rtdcom_lookup(rtd, DRV_NAME);

	struct snd_sof_dev *sdev = snd_soc_component_get_drvdata(component);

	struct snd_sof_pcm *spcm;

	int err;

	/* nothing to do for BE */

	if (rtd->dai_link->no_pcm)

		return 0;

	spcm = snd_sof_find_spcm_dai(sdev, rtd);

	if (!spcm)

		return -EINVAL;

	dev_dbg(sdev->dev, "pcm: close stream %d dir %d\n", spcm->pcm.pcm_id,

		substream->stream);

	err = snd_sof_pcm_platform_close(sdev, substream);

	if (err < 0) {

		dev_err(sdev->dev, "error: pcm close failed %d\n",

			err);

		/*

		 * keep going, no point in preventing the close

		 * from happening

		 */

	}

	pm_runtime_mark_last_busy(sdev->dev);

	err = pm_runtime_put_autosuspend(sdev->dev);

	if (err < 0)

		dev_err(sdev->dev, "error: pcm close failed to idle %d\n",

			err);

	return 0;

}

static struct snd_pcm_ops sof_pcm_ops = {

	.open		= sof_pcm_open,

	.close		= sof_pcm_close,

	.ioctl		= snd_pcm_lib_ioctl,

	.hw_params	= sof_pcm_hw_params,

	.prepare	= sof_pcm_prepare,

	.hw_free	= sof_pcm_hw_free,

	.trigger	= sof_pcm_trigger,

	.pointer	= sof_pcm_pointer,

	.page		= snd_pcm_sgbuf_ops_page,

};

/*

 * Pre-allocate playback/capture audio buffer pages.

 * no need to explicitly release memory preallocated by sof_pcm_new in pcm_free

 * snd_pcm_lib_preallocate_free_for_all() is called by the core.

 */

static int sof_pcm_new(struct snd_soc_pcm_runtime *rtd)

{

	struct snd_soc_component *component =

		snd_soc_rtdcom_lookup(rtd, DRV_NAME);

	struct snd_sof_dev *sdev = snd_soc_component_get_drvdata(component);

	struct snd_sof_pcm *spcm;

	struct snd_pcm *pcm = rtd->pcm;

	struct snd_soc_tplg_stream_caps *caps;

	int stream = SNDRV_PCM_STREAM_PLAYBACK;

	/* find SOF PCM for this RTD */

	spcm = snd_sof_find_spcm_dai(sdev, rtd);

	if (!spcm) {

		dev_warn(sdev->dev, "warn: can't find PCM with DAI ID %d\n",

			 rtd->dai_link->id);

		return 0;

	}

	dev_dbg(sdev->dev, "creating new PCM %s\n", spcm->pcm.pcm_name);

	/* do we need to pre-allocate playback audio buffer pages */

	if (!spcm->pcm.playback)

		goto capture;

	caps = &spcm->pcm.caps[stream];

	/* pre-allocate playback audio buffer pages */

	dev_dbg(sdev->dev, "spcm: allocate %s playback DMA buffer size 0x%x max 0x%x\n",

		caps->name, caps->buffer_size_min, caps->buffer_size_max);

	snd_pcm_lib_preallocate_pages(pcm->streams[stream].substream,

				      SNDRV_DMA_TYPE_DEV_SG, sdev->dev,

				      le32_to_cpu(caps->buffer_size_min),

				      le32_to_cpu(caps->buffer_size_max));

capture:

	stream = SNDRV_PCM_STREAM_CAPTURE;

	/* do we need to pre-allocate capture audio buffer pages */

	if (!spcm->pcm.capture)

		return 0;

	caps = &spcm->pcm.caps[stream];

	/* pre-allocate capture audio buffer pages */

	dev_dbg(sdev->dev, "spcm: allocate %s capture DMA buffer size 0x%x max 0x%x\n",

		caps->name, caps->buffer_size_min, caps->buffer_size_max);

	snd_pcm_lib_preallocate_pages(pcm->streams[stream].substream,

				      SNDRV_DMA_TYPE_DEV_SG, sdev->dev,

				      le32_to_cpu(caps->buffer_size_min),

				      le32_to_cpu(caps->buffer_size_max));

	return 0;

}

/* fixup the BE DAI link to match any values from topology */

static int sof_pcm_dai_link_fixup(struct snd_soc_pcm_runtime *rtd,

				  struct snd_pcm_hw_params *params)

{

	struct snd_interval *rate = hw_param_interval(params,

			SNDRV_PCM_HW_PARAM_RATE);

	struct snd_interval *channels = hw_param_interval(params,

						SNDRV_PCM_HW_PARAM_CHANNELS);

	struct snd_mask *fmt = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT);

	struct snd_soc_component *component =

		snd_soc_rtdcom_lookup(rtd, DRV_NAME);

	struct snd_sof_dev *sdev = snd_soc_component_get_drvdata(component);

	struct snd_sof_dai *dai =

		snd_sof_find_dai(sdev, (char *)rtd->dai_link->name);

	/* no topology exists for this BE, try a common configuration */

	if (!dai) {

		dev_warn(sdev->dev, "warning: no topology found for BE DAI %s config\n",

			 rtd->dai_link->name);

		/*  set 48k, stereo, 16bits by default */

		rate->min = 48000;

		rate->max = 48000;

		channels->min = 2;

		channels->max = 2;

		snd_mask_none(fmt);

		snd_mask_set_format(fmt, SNDRV_PCM_FORMAT_S16_LE);

		return 0;

	}

	/* read format from topology */

	snd_mask_none(fmt);

	switch (dai->comp_dai.config.frame_fmt) {

	case SOF_IPC_FRAME_S16_LE:

		snd_mask_set_format(fmt, SNDRV_PCM_FORMAT_S16_LE);

		break;

	case SOF_IPC_FRAME_S24_4LE:

		snd_mask_set_format(fmt, SNDRV_PCM_FORMAT_S24_LE);

		break;

	case SOF_IPC_FRAME_S32_LE:

		snd_mask_set_format(fmt, SNDRV_PCM_FORMAT_S32_LE);

		break;

	default:

		dev_err(sdev->dev, "error: No available DAI format!\n");

		return -EINVAL;

	}

	/* read rate and channels from topology */

	switch (dai->dai_config->type) {

	case SOF_DAI_INTEL_SSP:

		rate->min = dai->dai_config->ssp.fsync_rate;

		rate->max = dai->dai_config->ssp.fsync_rate;

		channels->min = dai->dai_config->ssp.tdm_slots;

		channels->max = dai->dai_config->ssp.tdm_slots;

		dev_dbg(sdev->dev,

			"rate_min: %d rate_max: %d\n", rate->min, rate->max);

		dev_dbg(sdev->dev,

			"channels_min: %d channels_max: %d\n",

			channels->min, channels->max);

		break;

	case SOF_DAI_INTEL_DMIC:

		/* DMIC only supports 16 or 32 bit formats */

		if (dai->comp_dai.config.frame_fmt == SOF_IPC_FRAME_S24_4LE) {

			dev_err(sdev->dev,

				"error: invalid fmt %d for DAI type %d\n",

				dai->comp_dai.config.frame_fmt,

				dai->dai_config->type);

		}

		break;

	case SOF_DAI_INTEL_HDA:

		/* do nothing for HDA dai_link */

		break;

	default:

		dev_err(sdev->dev, "error: invalid DAI type %d\n",

			dai->dai_config->type);

		break;

	}

	return 0;

}

static int sof_pcm_probe(struct snd_soc_component *component)

{

	struct snd_sof_dev *sdev = snd_soc_component_get_drvdata(component);

	struct snd_sof_pdata *plat_data = sdev->pdata;

	const char *tplg_filename;

	int ret;

	/* load the default topology */

	sdev->component = component;

	tplg_filename = devm_kasprintf(sdev->dev, GFP_KERNEL,

				       "%s/%s",

				       plat_data->tplg_filename_prefix,

				       plat_data->tplg_filename);

	if (!tplg_filename)

		return -ENOMEM;

	ret = snd_sof_load_topology(sdev, tplg_filename);

	if (ret < 0) {

		dev_err(sdev->dev, "error: failed to load DSP topology %d\n",

			ret);

		return ret;

	}