sound/soc/sof/sof-audio.c - linux - Git at Google

 // SPDX-License-Identifier: (GPL-2.0-only 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) 2019 Intel Corporation. All rights reserved.
 //
 // Author: Ranjani Sridharan <ranjani.sridharan@linux.intel.com>
 //

 #include "sof-audio.h"
 #include "ops.h"

 /*
  * helper to determine if there are only D0i3 compatible
  * streams active
  */
 bool snd_sof_dsp_only_d0i3_compatible_stream_active(struct snd_sof_dev *sdev)
 {
 	struct snd_pcm_substream *substream;
 	struct snd_sof_pcm *spcm;
 	bool d0i3_compatible_active = false;
 	int dir;

 	list_for_each_entry(spcm, &sdev->pcm_list, list) {
 		for_each_pcm_streams(dir) {
 			substream = spcm->stream[dir].substream;
 			if (!substream || !substream->runtime)
 				continue;

 			/*
 			 * substream->runtime being not NULL indicates that
 			 * that the stream is open. No need to check the
 			 * stream state.
 			 */
 			if (!spcm->stream[dir].d0i3_compatible)
 				return false;

 			d0i3_compatible_active = true;
 		}
 	}

 	return d0i3_compatible_active;
 }
 EXPORT_SYMBOL(snd_sof_dsp_only_d0i3_compatible_stream_active);

 bool snd_sof_stream_suspend_ignored(struct snd_sof_dev *sdev)
 {
 	struct snd_sof_pcm *spcm;

 	list_for_each_entry(spcm, &sdev->pcm_list, list) {
 		if (spcm->stream[SNDRV_PCM_STREAM_PLAYBACK].suspend_ignored ||
 		    spcm->stream[SNDRV_PCM_STREAM_CAPTURE].suspend_ignored)
 			return true;
 	}

 	return false;
 }

 int sof_set_hw_params_upon_resume(struct device *dev)
 {
 	struct snd_sof_dev *sdev = dev_get_drvdata(dev);
 	struct snd_pcm_substream *substream;
 	struct snd_sof_pcm *spcm;
 	snd_pcm_state_t state;
 	int dir;

 	/*
 	 * SOF requires hw_params to be set-up internally upon resume.
 	 * So, set the flag to indicate this for those streams that
 	 * have been suspended.
 	 */
 	list_for_each_entry(spcm, &sdev->pcm_list, list) {
 		for_each_pcm_streams(dir) {
 			/*
 			 * do not reset hw_params upon resume for streams that
 			 * were kept running during suspend
 			 */
 			if (spcm->stream[dir].suspend_ignored)
 				continue;

 			substream = spcm->stream[dir].substream;
 			if (!substream || !substream->runtime)
 				continue;

 			state = substream->runtime->status->state;
 			if (state == SNDRV_PCM_STATE_SUSPENDED)
 				spcm->prepared[dir] = false;
 		}
 	}

 	/* set internal flag for BE */
 	return snd_sof_dsp_hw_params_upon_resume(sdev);
 }

 static int sof_restore_kcontrols(struct device *dev)
 {
 	struct snd_sof_dev *sdev = dev_get_drvdata(dev);
 	struct snd_sof_control *scontrol;
 	int ipc_cmd, ctrl_type;
 	int ret = 0;

 	/* restore kcontrol values */
 	list_for_each_entry(scontrol, &sdev->kcontrol_list, list) {
 		/* reset readback offset for scontrol after resuming */
 		scontrol->readback_offset = 0;

 		/* notify DSP of kcontrol values */
 		switch (scontrol->cmd) {
 		case SOF_CTRL_CMD_VOLUME:
 		case SOF_CTRL_CMD_ENUM:
 		case SOF_CTRL_CMD_SWITCH:
 			ipc_cmd = SOF_IPC_COMP_SET_VALUE;
 			ctrl_type = SOF_CTRL_TYPE_VALUE_CHAN_SET;
 			ret = snd_sof_ipc_set_get_comp_data(scontrol,
 							    ipc_cmd, ctrl_type,
 							    scontrol->cmd,
 							    true);
 			break;
 		case SOF_CTRL_CMD_BINARY:
 			ipc_cmd = SOF_IPC_COMP_SET_DATA;
 			ctrl_type = SOF_CTRL_TYPE_DATA_SET;
 			ret = snd_sof_ipc_set_get_comp_data(scontrol,
 							    ipc_cmd, ctrl_type,
 							    scontrol->cmd,
 							    true);
 			break;

 		default:
 			break;
 		}

 		if (ret < 0) {
 			dev_err(dev,
 				"error: failed kcontrol value set for widget: %d\n",
 				scontrol->comp_id);

 			return ret;
 		}
 	}

 	return 0;
 }

 int sof_restore_pipelines(struct device *dev)
 {
 	struct snd_sof_dev *sdev = dev_get_drvdata(dev);
 	struct snd_sof_widget *swidget;
 	struct snd_sof_route *sroute;
 	struct sof_ipc_pipe_new *pipeline;
 	struct snd_sof_dai *dai;
 	struct sof_ipc_comp_dai *comp_dai;
 	struct sof_ipc_cmd_hdr *hdr;
 	int ret;

 	/* restore pipeline components */
 	list_for_each_entry_reverse(swidget, &sdev->widget_list, list) {
 		struct sof_ipc_comp_reply r;

 		/* skip if there is no private data */
 		if (!swidget->private)
 			continue;

 		switch (swidget->id) {
 		case snd_soc_dapm_dai_in:
 		case snd_soc_dapm_dai_out:
 			dai = swidget->private;
 			comp_dai = &dai->comp_dai;
 			ret = sof_ipc_tx_message(sdev->ipc,
 						 comp_dai->comp.hdr.cmd,
 						 comp_dai, sizeof(*comp_dai),
 						 &r, sizeof(r));
 			break;
 		case snd_soc_dapm_scheduler:

 			/*
 			 * During suspend, all DSP cores are powered off.
 			 * Therefore upon resume, create the pipeline comp
 			 * and power up the core that the pipeline is
 			 * scheduled on.
 			 */
 			pipeline = swidget->private;
 			ret = sof_load_pipeline_ipc(dev, pipeline, &r);
 			break;
 		default:
 			hdr = swidget->private;
 			ret = sof_ipc_tx_message(sdev->ipc, hdr->cmd,
 						 swidget->private, hdr->size,
 						 &r, sizeof(r));
 			break;
 		}
 		if (ret < 0) {
 			dev_err(dev,
 				"error: failed to load widget type %d with ID: %d\n",
 				swidget->widget->id, swidget->comp_id);

 			return ret;
 		}
 	}

 	/* restore pipeline connections */
 	list_for_each_entry_reverse(sroute, &sdev->route_list, list) {
 		struct sof_ipc_pipe_comp_connect *connect;
 		struct sof_ipc_reply reply;

 		/* skip if there's no private data */
 		if (!sroute->private)
 			continue;

 		connect = sroute->private;

 		/* send ipc */
 		ret = sof_ipc_tx_message(sdev->ipc,
 					 connect->hdr.cmd,
 					 connect, sizeof(*connect),
 					 &reply, sizeof(reply));
 		if (ret < 0) {
 			dev_err(dev,
 				"error: failed to load route sink %s control %s source %s\n",
 				sroute->route->sink,
 				sroute->route->control ? sroute->route->control
 					: "none",
 				sroute->route->source);

 			return ret;
 		}
 	}

 	/* restore dai links */
 	list_for_each_entry_reverse(dai, &sdev->dai_list, list) {
 		struct sof_ipc_reply reply;
 		struct sof_ipc_dai_config *config = dai->dai_config;

 		if (!config) {
 			dev_err(dev, "error: no config for DAI %s\n",
 				dai->name);
 			continue;
 		}

 		/*
 		 * The link DMA channel would be invalidated for running
 		 * streams but not for streams that were in the PAUSED
 		 * state during suspend. So invalidate it here before setting
 		 * the dai config in the DSP.
 		 */
 		if (config->type == SOF_DAI_INTEL_HDA)
 			config->hda.link_dma_ch = DMA_CHAN_INVALID;

 		ret = sof_ipc_tx_message(sdev->ipc,
 					 config->hdr.cmd, config,
 					 config->hdr.size,
 					 &reply, sizeof(reply));

 		if (ret < 0) {
 			dev_err(dev,
 				"error: failed to set dai config for %s\n",
 				dai->name);

 			return ret;
 		}
 	}

 	/* complete pipeline */
 	list_for_each_entry(swidget, &sdev->widget_list, list) {
 		switch (swidget->id) {
 		case snd_soc_dapm_scheduler:
 			swidget->complete =
 				snd_sof_complete_pipeline(dev, swidget);
 			break;
 		default:
 			break;
 		}
 	}

 	/* restore pipeline kcontrols */
 	ret = sof_restore_kcontrols(dev);
 	if (ret < 0)
 		dev_err(dev,
 			"error: restoring kcontrols after resume\n");

 	return ret;
 }

 /*
  * Generic object lookup APIs.
  */

 struct snd_sof_pcm *snd_sof_find_spcm_name(struct snd_soc_component *scomp,
 					   const char *name)
 {
 	struct snd_sof_dev *sdev = snd_soc_component_get_drvdata(scomp);
 	struct snd_sof_pcm *spcm;

 	list_for_each_entry(spcm, &sdev->pcm_list, list) {
 		/* match with PCM dai name */
 		if (strcmp(spcm->pcm.dai_name, name) == 0)
 			return spcm;

 		/* match with playback caps name if set */
 		if (*spcm->pcm.caps[0].name &&
 		    !strcmp(spcm->pcm.caps[0].name, name))
 			return spcm;

 		/* match with capture caps name if set */
 		if (*spcm->pcm.caps[1].name &&
 		    !strcmp(spcm->pcm.caps[1].name, name))
 			return spcm;
 	}

 	return NULL;
 }

 struct snd_sof_pcm *snd_sof_find_spcm_comp(struct snd_soc_component *scomp,
 					   unsigned int comp_id,
 					   int *direction)
 {
 	struct snd_sof_dev *sdev = snd_soc_component_get_drvdata(scomp);
 	struct snd_sof_pcm *spcm;
 	int dir;

 	list_for_each_entry(spcm, &sdev->pcm_list, list) {
 		for_each_pcm_streams(dir) {
 			if (spcm->stream[dir].comp_id == comp_id) {
 				*direction = dir;
 				return spcm;
 			}
 		}
 	}

 	return NULL;
 }

 struct snd_sof_pcm *snd_sof_find_spcm_pcm_id(struct snd_soc_component *scomp,
 					     unsigned int pcm_id)
 {
 	struct snd_sof_dev *sdev = snd_soc_component_get_drvdata(scomp);
 	struct snd_sof_pcm *spcm;

 	list_for_each_entry(spcm, &sdev->pcm_list, list) {
 		if (le32_to_cpu(spcm->pcm.pcm_id) == pcm_id)
 			return spcm;
 	}

 	return NULL;
 }

 struct snd_sof_widget *snd_sof_find_swidget(struct snd_soc_component *scomp,
 					    const char *name)
 {
 	struct snd_sof_dev *sdev = snd_soc_component_get_drvdata(scomp);
 	struct snd_sof_widget *swidget;

 	list_for_each_entry(swidget, &sdev->widget_list, list) {
 		if (strcmp(name, swidget->widget->name) == 0)
 			return swidget;
 	}

 	return NULL;
 }

 /* find widget by stream name and direction */
 struct snd_sof_widget *
 snd_sof_find_swidget_sname(struct snd_soc_component *scomp,
 			   const char *pcm_name, int dir)
 {
 	struct snd_sof_dev *sdev = snd_soc_component_get_drvdata(scomp);
 	struct snd_sof_widget *swidget;
 	enum snd_soc_dapm_type type;

 	if (dir == SNDRV_PCM_STREAM_PLAYBACK)
 		type = snd_soc_dapm_aif_in;
 	else
 		type = snd_soc_dapm_aif_out;

 	list_for_each_entry(swidget, &sdev->widget_list, list) {
 		if (!strcmp(pcm_name, swidget->widget->sname) &&
 		    swidget->id == type)
 			return swidget;
 	}

 	return NULL;
 }

 struct snd_sof_dai *snd_sof_find_dai(struct snd_soc_component *scomp,
 				     const char *name)
 {
 	struct snd_sof_dev *sdev = snd_soc_component_get_drvdata(scomp);
 	struct snd_sof_dai *dai;

 	list_for_each_entry(dai, &sdev->dai_list, list) {
 		if (dai->name && (strcmp(name, dai->name) == 0))
 			return dai;
 	}

 	return NULL;
 }

 /*
  * SOF Driver enumeration.
  */
 int sof_machine_check(struct snd_sof_dev *sdev)
 {
 	struct snd_sof_pdata *sof_pdata = sdev->pdata;
 	const struct sof_dev_desc *desc = sof_pdata->desc;
 	struct snd_soc_acpi_mach *mach;
 	int ret;

 	/* force nocodec mode */
 #if IS_ENABLED(CONFIG_SND_SOC_SOF_FORCE_NOCODEC_MODE)
 		dev_warn(sdev->dev, "Force to use nocodec mode\n");
 		goto nocodec;
 #endif

 	/* find machine */
 	snd_sof_machine_select(sdev);
 	if (sof_pdata->machine) {
 		snd_sof_set_mach_params(sof_pdata->machine, sdev->dev);
 		return 0;
 	}

 #if !IS_ENABLED(CONFIG_SND_SOC_SOF_NOCODEC)
 	dev_err(sdev->dev, "error: no matching ASoC machine driver found - aborting probe\n");
 	return -ENODEV;
 #endif
 #if IS_ENABLED(CONFIG_SND_SOC_SOF_FORCE_NOCODEC_MODE)
 nocodec:
 #endif
 	/* select nocodec mode */
 	dev_warn(sdev->dev, "Using nocodec machine driver\n");
 	mach = devm_kzalloc(sdev->dev, sizeof(*mach), GFP_KERNEL);
 	if (!mach)
 		return -ENOMEM;

 	mach->drv_name = "sof-nocodec";
 	sof_pdata->tplg_filename = desc->nocodec_tplg_filename;

 	ret = sof_nocodec_setup(sdev->dev, desc->ops);
 	if (ret < 0)
 		return ret;

 	sof_pdata->machine = mach;
 	snd_sof_set_mach_params(sof_pdata->machine, sdev->dev);

 	return 0;
 }
 EXPORT_SYMBOL(sof_machine_check);

 int sof_machine_register(struct snd_sof_dev *sdev, void *pdata)
 {
 	struct snd_sof_pdata *plat_data = (struct snd_sof_pdata *)pdata;
 	const char *drv_name;
 	const void *mach;
 	int size;

 	drv_name = plat_data->machine->drv_name;
 	mach = (const void *)plat_data->machine;
 	size = sizeof(*plat_data->machine);

 	/* register machine driver, pass machine info as pdata */
 	plat_data->pdev_mach =
 		platform_device_register_data(sdev->dev, drv_name,
 					      PLATFORM_DEVID_NONE, mach, size);
 	if (IS_ERR(plat_data->pdev_mach))
 		return PTR_ERR(plat_data->pdev_mach);

 	dev_dbg(sdev->dev, "created machine %s\n",
 		dev_name(&plat_data->pdev_mach->dev));

 	return 0;
 }
 EXPORT_SYMBOL(sof_machine_register);

 void sof_machine_unregister(struct snd_sof_dev *sdev, void *pdata)
 {
 	struct snd_sof_pdata *plat_data = (struct snd_sof_pdata *)pdata;

 	if (!IS_ERR_OR_NULL(plat_data->pdev_mach))
 		platform_device_unregister(plat_data->pdev_mach);
 }
 EXPORT_SYMBOL(sof_machine_unregister);
	// SPDX-License-Identifier: (GPL-2.0-only 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) 2019 Intel Corporation. All rights reserved.
	//
	// Author: Ranjani Sridharan <ranjani.sridharan@linux.intel.com>
	//

	#include "sof-audio.h"
	#include "ops.h"

	/*
	* helper to determine if there are only D0i3 compatible
	* streams active
	*/
	bool snd_sof_dsp_only_d0i3_compatible_stream_active(struct snd_sof_dev *sdev)
	{
	struct snd_pcm_substream *substream;
	struct snd_sof_pcm *spcm;
	bool d0i3_compatible_active = false;
	int dir;

	list_for_each_entry(spcm, &sdev->pcm_list, list) {
	for_each_pcm_streams(dir) {
	substream = spcm->stream[dir].substream;
	if (!substream \|\| !substream->runtime)
	continue;

	/*
	* substream->runtime being not NULL indicates that
	* that the stream is open. No need to check the
	* stream state.
	*/
	if (!spcm->stream[dir].d0i3_compatible)
	return false;

	d0i3_compatible_active = true;
	}
	}

	return d0i3_compatible_active;
	}
	EXPORT_SYMBOL(snd_sof_dsp_only_d0i3_compatible_stream_active);

	bool snd_sof_stream_suspend_ignored(struct snd_sof_dev *sdev)
	{
	struct snd_sof_pcm *spcm;

	list_for_each_entry(spcm, &sdev->pcm_list, list) {
	if (spcm->stream[SNDRV_PCM_STREAM_PLAYBACK].suspend_ignored \|\|
	spcm->stream[SNDRV_PCM_STREAM_CAPTURE].suspend_ignored)
	return true;
	}

	return false;
	}

	int sof_set_hw_params_upon_resume(struct device *dev)
	{
	struct snd_sof_dev *sdev = dev_get_drvdata(dev);
	struct snd_pcm_substream *substream;
	struct snd_sof_pcm *spcm;
	snd_pcm_state_t state;
	int dir;

	/*
	* SOF requires hw_params to be set-up internally upon resume.
	* So, set the flag to indicate this for those streams that
	* have been suspended.
	*/
	list_for_each_entry(spcm, &sdev->pcm_list, list) {
	for_each_pcm_streams(dir) {
	/*
	* do not reset hw_params upon resume for streams that
	* were kept running during suspend
	*/
	if (spcm->stream[dir].suspend_ignored)
	continue;

	substream = spcm->stream[dir].substream;
	if (!substream \|\| !substream->runtime)
	continue;

	state = substream->runtime->status->state;
	if (state == SNDRV_PCM_STATE_SUSPENDED)
	spcm->prepared[dir] = false;
	}
	}

	/* set internal flag for BE */
	return snd_sof_dsp_hw_params_upon_resume(sdev);
	}

	static int sof_restore_kcontrols(struct device *dev)
	{
	struct snd_sof_dev *sdev = dev_get_drvdata(dev);
	struct snd_sof_control *scontrol;
	int ipc_cmd, ctrl_type;
	int ret = 0;

	/* restore kcontrol values */
	list_for_each_entry(scontrol, &sdev->kcontrol_list, list) {
	/* reset readback offset for scontrol after resuming */
	scontrol->readback_offset = 0;

	/* notify DSP of kcontrol values */
	switch (scontrol->cmd) {
	case SOF_CTRL_CMD_VOLUME:
	case SOF_CTRL_CMD_ENUM:
	case SOF_CTRL_CMD_SWITCH:
	ipc_cmd = SOF_IPC_COMP_SET_VALUE;
	ctrl_type = SOF_CTRL_TYPE_VALUE_CHAN_SET;
	ret = snd_sof_ipc_set_get_comp_data(scontrol,
	ipc_cmd, ctrl_type,
	scontrol->cmd,
	true);
	break;
	case SOF_CTRL_CMD_BINARY:
	ipc_cmd = SOF_IPC_COMP_SET_DATA;
	ctrl_type = SOF_CTRL_TYPE_DATA_SET;
	ret = snd_sof_ipc_set_get_comp_data(scontrol,
	ipc_cmd, ctrl_type,
	scontrol->cmd,
	true);
	break;

	default:
	break;
	}

	if (ret < 0) {
	dev_err(dev,
	"error: failed kcontrol value set for widget: %d\n",
	scontrol->comp_id);

	return ret;
	}
	}

	return 0;
	}

	int sof_restore_pipelines(struct device *dev)
	{
	struct snd_sof_dev *sdev = dev_get_drvdata(dev);
	struct snd_sof_widget *swidget;
	struct snd_sof_route *sroute;
	struct sof_ipc_pipe_new *pipeline;
	struct snd_sof_dai *dai;
	struct sof_ipc_comp_dai *comp_dai;
	struct sof_ipc_cmd_hdr *hdr;
	int ret;

	/* restore pipeline components */
	list_for_each_entry_reverse(swidget, &sdev->widget_list, list) {
	struct sof_ipc_comp_reply r;

	/* skip if there is no private data */
	if (!swidget->private)
	continue;

	switch (swidget->id) {
	case snd_soc_dapm_dai_in:
	case snd_soc_dapm_dai_out:
	dai = swidget->private;
	comp_dai = &dai->comp_dai;
	ret = sof_ipc_tx_message(sdev->ipc,
	comp_dai->comp.hdr.cmd,
	comp_dai, sizeof(*comp_dai),
	&r, sizeof(r));
	break;
	case snd_soc_dapm_scheduler:

	/*
	* During suspend, all DSP cores are powered off.
	* Therefore upon resume, create the pipeline comp
	* and power up the core that the pipeline is
	* scheduled on.
	*/
	pipeline = swidget->private;
	ret = sof_load_pipeline_ipc(dev, pipeline, &r);
	break;
	default:
	hdr = swidget->private;
	ret = sof_ipc_tx_message(sdev->ipc, hdr->cmd,
	swidget->private, hdr->size,
	&r, sizeof(r));
	break;
	}
	if (ret < 0) {
	dev_err(dev,
	"error: failed to load widget type %d with ID: %d\n",
	swidget->widget->id, swidget->comp_id);

	return ret;
	}
	}

	/* restore pipeline connections */
	list_for_each_entry_reverse(sroute, &sdev->route_list, list) {
	struct sof_ipc_pipe_comp_connect *connect;
	struct sof_ipc_reply reply;

	/* skip if there's no private data */
	if (!sroute->private)
	continue;

	connect = sroute->private;

	/* send ipc */
	ret = sof_ipc_tx_message(sdev->ipc,
	connect->hdr.cmd,
	connect, sizeof(*connect),
	&reply, sizeof(reply));
	if (ret < 0) {
	dev_err(dev,
	"error: failed to load route sink %s control %s source %s\n",
	sroute->route->sink,
	sroute->route->control ? sroute->route->control
	: "none",
	sroute->route->source);

	return ret;
	}
	}

	/* restore dai links */
	list_for_each_entry_reverse(dai, &sdev->dai_list, list) {
	struct sof_ipc_reply reply;
	struct sof_ipc_dai_config *config = dai->dai_config;

	if (!config) {
	dev_err(dev, "error: no config for DAI %s\n",
	dai->name);
	continue;
	}

	/*
	* The link DMA channel would be invalidated for running
	* streams but not for streams that were in the PAUSED
	* state during suspend. So invalidate it here before setting
	* the dai config in the DSP.
	*/
	if (config->type == SOF_DAI_INTEL_HDA)
	config->hda.link_dma_ch = DMA_CHAN_INVALID;

	ret = sof_ipc_tx_message(sdev->ipc,
	config->hdr.cmd, config,
	config->hdr.size,
	&reply, sizeof(reply));

	if (ret < 0) {
	dev_err(dev,
	"error: failed to set dai config for %s\n",
	dai->name);

	return ret;
	}
	}

	/* complete pipeline */
	list_for_each_entry(swidget, &sdev->widget_list, list) {
	switch (swidget->id) {
	case snd_soc_dapm_scheduler:
	swidget->complete =
	snd_sof_complete_pipeline(dev, swidget);
	break;
	default:
	break;
	}
	}

	/* restore pipeline kcontrols */
	ret = sof_restore_kcontrols(dev);
	if (ret < 0)
	dev_err(dev,
	"error: restoring kcontrols after resume\n");

	return ret;
	}

	/*
	* Generic object lookup APIs.
	*/

	struct snd_sof_pcm snd_sof_find_spcm_name(struct snd_soc_component scomp,
	const char *name)
	{
	struct snd_sof_dev *sdev = snd_soc_component_get_drvdata(scomp);
	struct snd_sof_pcm *spcm;

	list_for_each_entry(spcm, &sdev->pcm_list, list) {
	/* match with PCM dai name */
	if (strcmp(spcm->pcm.dai_name, name) == 0)
	return spcm;

	/* match with playback caps name if set */
	if (*spcm->pcm.caps[0].name &&
	!strcmp(spcm->pcm.caps[0].name, name))
	return spcm;

	/* match with capture caps name if set */
	if (*spcm->pcm.caps[1].name &&
	!strcmp(spcm->pcm.caps[1].name, name))
	return spcm;
	}

	return NULL;
	}

	struct snd_sof_pcm snd_sof_find_spcm_comp(struct snd_soc_component scomp,
	unsigned int comp_id,
	int *direction)
	{
	struct snd_sof_dev *sdev = snd_soc_component_get_drvdata(scomp);
	struct snd_sof_pcm *spcm;
	int dir;

	list_for_each_entry(spcm, &sdev->pcm_list, list) {
	for_each_pcm_streams(dir) {
	if (spcm->stream[dir].comp_id == comp_id) {
	*direction = dir;
	return spcm;
	}
	}
	}

	return NULL;
	}

	struct snd_sof_pcm snd_sof_find_spcm_pcm_id(struct snd_soc_component scomp,
	unsigned int pcm_id)
	{
	struct snd_sof_dev *sdev = snd_soc_component_get_drvdata(scomp);
	struct snd_sof_pcm *spcm;

	list_for_each_entry(spcm, &sdev->pcm_list, list) {
	if (le32_to_cpu(spcm->pcm.pcm_id) == pcm_id)
	return spcm;
	}

	return NULL;
	}

	struct snd_sof_widget snd_sof_find_swidget(struct snd_soc_component scomp,
	const char *name)
	{
	struct snd_sof_dev *sdev = snd_soc_component_get_drvdata(scomp);
	struct snd_sof_widget *swidget;

	list_for_each_entry(swidget, &sdev->widget_list, list) {
	if (strcmp(name, swidget->widget->name) == 0)
	return swidget;
	}

	return NULL;
	}

	/* find widget by stream name and direction */
	struct snd_sof_widget *
	snd_sof_find_swidget_sname(struct snd_soc_component *scomp,
	const char *pcm_name, int dir)
	{
	struct snd_sof_dev *sdev = snd_soc_component_get_drvdata(scomp);
	struct snd_sof_widget *swidget;
	enum snd_soc_dapm_type type;

	if (dir == SNDRV_PCM_STREAM_PLAYBACK)
	type = snd_soc_dapm_aif_in;
	else
	type = snd_soc_dapm_aif_out;

	list_for_each_entry(swidget, &sdev->widget_list, list) {
	if (!strcmp(pcm_name, swidget->widget->sname) &&
	swidget->id == type)
	return swidget;
	}

	return NULL;
	}

	struct snd_sof_dai snd_sof_find_dai(struct snd_soc_component scomp,
	const char *name)
	{
	struct snd_sof_dev *sdev = snd_soc_component_get_drvdata(scomp);
	struct snd_sof_dai *dai;

	list_for_each_entry(dai, &sdev->dai_list, list) {
	if (dai->name && (strcmp(name, dai->name) == 0))
	return dai;
	}

	return NULL;
	}

	/*
	* SOF Driver enumeration.
	*/
	int sof_machine_check(struct snd_sof_dev *sdev)
	{
	struct snd_sof_pdata *sof_pdata = sdev->pdata;
	const struct sof_dev_desc *desc = sof_pdata->desc;
	struct snd_soc_acpi_mach *mach;
	int ret;

	/* force nocodec mode */
	#if IS_ENABLED(CONFIG_SND_SOC_SOF_FORCE_NOCODEC_MODE)
	dev_warn(sdev->dev, "Force to use nocodec mode\n");
	goto nocodec;
	#endif

	/* find machine */
	snd_sof_machine_select(sdev);
	if (sof_pdata->machine) {
	snd_sof_set_mach_params(sof_pdata->machine, sdev->dev);
	return 0;
	}

	#if !IS_ENABLED(CONFIG_SND_SOC_SOF_NOCODEC)
	dev_err(sdev->dev, "error: no matching ASoC machine driver found - aborting probe\n");
	return -ENODEV;
	#endif
	#if IS_ENABLED(CONFIG_SND_SOC_SOF_FORCE_NOCODEC_MODE)
	nocodec:
	#endif
	/* select nocodec mode */
	dev_warn(sdev->dev, "Using nocodec machine driver\n");
	mach = devm_kzalloc(sdev->dev, sizeof(*mach), GFP_KERNEL);
	if (!mach)
	return -ENOMEM;

	mach->drv_name = "sof-nocodec";
	sof_pdata->tplg_filename = desc->nocodec_tplg_filename;

	ret = sof_nocodec_setup(sdev->dev, desc->ops);
	if (ret < 0)
	return ret;

	sof_pdata->machine = mach;
	snd_sof_set_mach_params(sof_pdata->machine, sdev->dev);

	return 0;
	}
	EXPORT_SYMBOL(sof_machine_check);

	int sof_machine_register(struct snd_sof_dev sdev, void pdata)
	{
	struct snd_sof_pdata plat_data = (struct snd_sof_pdata )pdata;
	const char *drv_name;
	const void *mach;
	int size;

	drv_name = plat_data->machine->drv_name;
	mach = (const void *)plat_data->machine;
	size = sizeof(*plat_data->machine);

	/* register machine driver, pass machine info as pdata */
	plat_data->pdev_mach =
	platform_device_register_data(sdev->dev, drv_name,
	PLATFORM_DEVID_NONE, mach, size);
	if (IS_ERR(plat_data->pdev_mach))
	return PTR_ERR(plat_data->pdev_mach);

	dev_dbg(sdev->dev, "created machine %s\n",
	dev_name(&plat_data->pdev_mach->dev));

	return 0;
	}
	EXPORT_SYMBOL(sof_machine_register);

	void sof_machine_unregister(struct snd_sof_dev sdev, void pdata)
	{
	struct snd_sof_pdata plat_data = (struct snd_sof_pdata )pdata;

	if (!IS_ERR_OR_NULL(plat_data->pdev_mach))
	platform_device_unregister(plat_data->pdev_mach);
	}
	EXPORT_SYMBOL(sof_machine_unregister);