sound/soc/sof/control.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) 2018 Intel Corporation. All rights reserved.
 //
 // Author: Liam Girdwood <liam.r.girdwood@linux.intel.com>
 //

 /* Mixer Controls */

 #include <linux/pm_runtime.h>
 #include <linux/leds.h>
 #include "sof-priv.h"
 #include "sof-audio.h"

 static void update_mute_led(struct snd_sof_control *scontrol,
 			    struct snd_kcontrol *kcontrol,
 			    struct snd_ctl_elem_value *ucontrol)
 {
 	int temp = 0;
 	int mask;
 	int i;

 	mask = 1U << snd_ctl_get_ioffidx(kcontrol, &ucontrol->id);

 	for (i = 0; i < scontrol->num_channels; i++) {
 		if (ucontrol->value.integer.value[i]) {
 			temp |= mask;
 			break;
 		}
 	}

 	if (temp == scontrol->led_ctl.led_value)
 		return;

 	scontrol->led_ctl.led_value = temp;

 #if IS_REACHABLE(CONFIG_LEDS_TRIGGER_AUDIO)
 	if (!scontrol->led_ctl.direction)
 		ledtrig_audio_set(LED_AUDIO_MUTE, temp ? LED_OFF : LED_ON);
 	else
 		ledtrig_audio_set(LED_AUDIO_MICMUTE, temp ? LED_OFF : LED_ON);
 #endif
 }

 static inline u32 mixer_to_ipc(unsigned int value, u32 *volume_map, int size)
 {
 	if (value >= size)
 		return volume_map[size - 1];

 	return volume_map[value];
 }

 static inline u32 ipc_to_mixer(u32 value, u32 *volume_map, int size)
 {
 	int i;

 	for (i = 0; i < size; i++) {
 		if (volume_map[i] >= value)
 			return i;
 	}

 	return i - 1;
 }

 int snd_sof_volume_get(struct snd_kcontrol *kcontrol,
 		       struct snd_ctl_elem_value *ucontrol)
 {
 	struct soc_mixer_control *sm =
 		(struct soc_mixer_control *)kcontrol->private_value;
 	struct snd_sof_control *scontrol = sm->dobj.private;
 	struct sof_ipc_ctrl_data *cdata = scontrol->control_data;
 	unsigned int i, channels = scontrol->num_channels;

 	/* read back each channel */
 	for (i = 0; i < channels; i++)
 		ucontrol->value.integer.value[i] =
 			ipc_to_mixer(cdata->chanv[i].value,
 				     scontrol->volume_table, sm->max + 1);

 	return 0;
 }

 int snd_sof_volume_put(struct snd_kcontrol *kcontrol,
 		       struct snd_ctl_elem_value *ucontrol)
 {
 	struct soc_mixer_control *sm =
 		(struct soc_mixer_control *)kcontrol->private_value;
 	struct snd_sof_control *scontrol = sm->dobj.private;
 	struct snd_soc_component *scomp = scontrol->scomp;
 	struct sof_ipc_ctrl_data *cdata = scontrol->control_data;
 	unsigned int i, channels = scontrol->num_channels;
 	bool change = false;
 	u32 value;

 	/* update each channel */
 	for (i = 0; i < channels; i++) {
 		value = mixer_to_ipc(ucontrol->value.integer.value[i],
 				     scontrol->volume_table, sm->max + 1);
 		change = change || (value != cdata->chanv[i].value);
 		cdata->chanv[i].channel = i;
 		cdata->chanv[i].value = value;
 	}

 	/* notify DSP of mixer updates */
 	if (pm_runtime_active(scomp->dev))
 		snd_sof_ipc_set_get_comp_data(scontrol,
 					      SOF_IPC_COMP_SET_VALUE,
 					      SOF_CTRL_TYPE_VALUE_CHAN_GET,
 					      SOF_CTRL_CMD_VOLUME,
 					      true);
 	return change;
 }

 int snd_sof_switch_get(struct snd_kcontrol *kcontrol,
 		       struct snd_ctl_elem_value *ucontrol)
 {
 	struct soc_mixer_control *sm =
 		(struct soc_mixer_control *)kcontrol->private_value;
 	struct snd_sof_control *scontrol = sm->dobj.private;
 	struct sof_ipc_ctrl_data *cdata = scontrol->control_data;
 	unsigned int i, channels = scontrol->num_channels;

 	/* read back each channel */
 	for (i = 0; i < channels; i++)
 		ucontrol->value.integer.value[i] = cdata->chanv[i].value;

 	return 0;
 }

 int snd_sof_switch_put(struct snd_kcontrol *kcontrol,
 		       struct snd_ctl_elem_value *ucontrol)
 {
 	struct soc_mixer_control *sm =
 		(struct soc_mixer_control *)kcontrol->private_value;
 	struct snd_sof_control *scontrol = sm->dobj.private;
 	struct snd_soc_component *scomp = scontrol->scomp;
 	struct sof_ipc_ctrl_data *cdata = scontrol->control_data;
 	unsigned int i, channels = scontrol->num_channels;
 	bool change = false;
 	u32 value;

 	/* update each channel */
 	for (i = 0; i < channels; i++) {
 		value = ucontrol->value.integer.value[i];
 		change = change || (value != cdata->chanv[i].value);
 		cdata->chanv[i].channel = i;
 		cdata->chanv[i].value = value;
 	}

 	if (scontrol->led_ctl.use_led)
 		update_mute_led(scontrol, kcontrol, ucontrol);

 	/* notify DSP of mixer updates */
 	if (pm_runtime_active(scomp->dev))
 		snd_sof_ipc_set_get_comp_data(scontrol,
 					      SOF_IPC_COMP_SET_VALUE,
 					      SOF_CTRL_TYPE_VALUE_CHAN_GET,
 					      SOF_CTRL_CMD_SWITCH,
 					      true);

 	return change;
 }

 int snd_sof_enum_get(struct snd_kcontrol *kcontrol,
 		     struct snd_ctl_elem_value *ucontrol)
 {
 	struct soc_enum *se =
 		(struct soc_enum *)kcontrol->private_value;
 	struct snd_sof_control *scontrol = se->dobj.private;
 	struct sof_ipc_ctrl_data *cdata = scontrol->control_data;
 	unsigned int i, channels = scontrol->num_channels;

 	/* read back each channel */
 	for (i = 0; i < channels; i++)
 		ucontrol->value.enumerated.item[i] = cdata->chanv[i].value;

 	return 0;
 }

 int snd_sof_enum_put(struct snd_kcontrol *kcontrol,
 		     struct snd_ctl_elem_value *ucontrol)
 {
 	struct soc_enum *se =
 		(struct soc_enum *)kcontrol->private_value;
 	struct snd_sof_control *scontrol = se->dobj.private;
 	struct snd_soc_component *scomp = scontrol->scomp;
 	struct sof_ipc_ctrl_data *cdata = scontrol->control_data;
 	unsigned int i, channels = scontrol->num_channels;
 	bool change = false;
 	u32 value;

 	/* update each channel */
 	for (i = 0; i < channels; i++) {
 		value = ucontrol->value.enumerated.item[i];
 		change = change || (value != cdata->chanv[i].value);
 		cdata->chanv[i].channel = i;
 		cdata->chanv[i].value = value;
 	}

 	/* notify DSP of enum updates */
 	if (pm_runtime_active(scomp->dev))
 		snd_sof_ipc_set_get_comp_data(scontrol,
 					      SOF_IPC_COMP_SET_VALUE,
 					      SOF_CTRL_TYPE_VALUE_CHAN_GET,
 					      SOF_CTRL_CMD_ENUM,
 					      true);

 	return change;
 }

 int snd_sof_bytes_get(struct snd_kcontrol *kcontrol,
 		      struct snd_ctl_elem_value *ucontrol)
 {
 	struct soc_bytes_ext *be =
 		(struct soc_bytes_ext *)kcontrol->private_value;
 	struct snd_sof_control *scontrol = be->dobj.private;
 	struct snd_soc_component *scomp = scontrol->scomp;
 	struct sof_ipc_ctrl_data *cdata = scontrol->control_data;
 	struct sof_abi_hdr *data = cdata->data;
 	size_t size;
 	int ret = 0;

 	if (be->max > sizeof(ucontrol->value.bytes.data)) {
 		dev_err_ratelimited(scomp->dev,
 				    "error: data max %d exceeds ucontrol data array size\n",
 				    be->max);
 		return -EINVAL;
 	}

 	size = data->size + sizeof(*data);
 	if (size > be->max) {
 		dev_err_ratelimited(scomp->dev,
 				    "error: DSP sent %zu bytes max is %d\n",
 				    size, be->max);
 		ret = -EINVAL;
 		goto out;
 	}

 	/* copy back to kcontrol */
 	memcpy(ucontrol->value.bytes.data, data, size);

 out:
 	return ret;
 }

 int snd_sof_bytes_put(struct snd_kcontrol *kcontrol,
 		      struct snd_ctl_elem_value *ucontrol)
 {
 	struct soc_bytes_ext *be =
 		(struct soc_bytes_ext *)kcontrol->private_value;
 	struct snd_sof_control *scontrol = be->dobj.private;
 	struct snd_soc_component *scomp = scontrol->scomp;
 	struct sof_ipc_ctrl_data *cdata = scontrol->control_data;
 	struct sof_abi_hdr *data = cdata->data;
 	size_t size = data->size + sizeof(*data);

 	if (be->max > sizeof(ucontrol->value.bytes.data)) {
 		dev_err_ratelimited(scomp->dev,
 				    "error: data max %d exceeds ucontrol data array size\n",
 				    be->max);
 		return -EINVAL;
 	}

 	if (size > be->max) {
 		dev_err_ratelimited(scomp->dev,
 				    "error: size too big %zu bytes max is %d\n",
 				    size, be->max);
 		return -EINVAL;
 	}

 	/* copy from kcontrol */
 	memcpy(data, ucontrol->value.bytes.data, size);

 	/* notify DSP of byte control updates */
 	if (pm_runtime_active(scomp->dev))
 		snd_sof_ipc_set_get_comp_data(scontrol,
 					      SOF_IPC_COMP_SET_DATA,
 					      SOF_CTRL_TYPE_DATA_SET,
 					      scontrol->cmd,
 					      true);

 	return 0;
 }

 int snd_sof_bytes_ext_put(struct snd_kcontrol *kcontrol,
 			  const unsigned int __user *binary_data,
 			  unsigned int size)
 {
 	struct soc_bytes_ext *be =
 		(struct soc_bytes_ext *)kcontrol->private_value;
 	struct snd_sof_control *scontrol = be->dobj.private;
 	struct snd_soc_component *scomp = scontrol->scomp;
 	struct sof_ipc_ctrl_data *cdata = scontrol->control_data;
 	struct snd_ctl_tlv header;
 	const struct snd_ctl_tlv __user *tlvd =
 		(const struct snd_ctl_tlv __user *)binary_data;

 	/*
 	 * The beginning of bytes data contains a header from where
 	 * the length (as bytes) is needed to know the correct copy
 	 * length of data from tlvd->tlv.
 	 */
 	if (copy_from_user(&header, tlvd, sizeof(const struct snd_ctl_tlv)))
 		return -EFAULT;

 	/* be->max is coming from topology */
 	if (header.length > be->max) {
 		dev_err_ratelimited(scomp->dev, "error: Bytes data size %d exceeds max %d.\n",
 				    header.length, be->max);
 		return -EINVAL;
 	}

 	/* Check that header id matches the command */
 	if (header.numid != scontrol->cmd) {
 		dev_err_ratelimited(scomp->dev,
 				    "error: incorrect numid %d\n",
 				    header.numid);
 		return -EINVAL;
 	}

 	if (copy_from_user(cdata->data, tlvd->tlv, header.length))
 		return -EFAULT;

 	if (cdata->data->magic != SOF_ABI_MAGIC) {
 		dev_err_ratelimited(scomp->dev,
 				    "error: Wrong ABI magic 0x%08x.\n",
 				    cdata->data->magic);
 		return -EINVAL;
 	}

 	if (SOF_ABI_VERSION_INCOMPATIBLE(SOF_ABI_VERSION, cdata->data->abi)) {
 		dev_err_ratelimited(scomp->dev, "error: Incompatible ABI version 0x%08x.\n",
 				    cdata->data->abi);
 		return -EINVAL;
 	}

 	if (cdata->data->size + sizeof(const struct sof_abi_hdr) > be->max) {
 		dev_err_ratelimited(scomp->dev, "error: Mismatch in ABI data size (truncated?).\n");
 		return -EINVAL;
 	}

 	/* notify DSP of byte control updates */
 	if (pm_runtime_active(scomp->dev))
 		snd_sof_ipc_set_get_comp_data(scontrol,
 					      SOF_IPC_COMP_SET_DATA,
 					      SOF_CTRL_TYPE_DATA_SET,
 					      scontrol->cmd,
 					      true);

 	return 0;
 }

 int snd_sof_bytes_ext_get(struct snd_kcontrol *kcontrol,
 			  unsigned int __user *binary_data,
 			  unsigned int size)
 {
 	struct soc_bytes_ext *be =
 		(struct soc_bytes_ext *)kcontrol->private_value;
 	struct snd_sof_control *scontrol = be->dobj.private;
 	struct snd_soc_component *scomp = scontrol->scomp;
 	struct sof_ipc_ctrl_data *cdata = scontrol->control_data;
 	struct snd_ctl_tlv header;
 	struct snd_ctl_tlv __user *tlvd =
 		(struct snd_ctl_tlv __user *)binary_data;
 	int data_size;
 	int ret = 0;

 	/*
 	 * Decrement the limit by ext bytes header size to
 	 * ensure the user space buffer is not exceeded.
 	 */
 	size -= sizeof(const struct snd_ctl_tlv);

 	/* set the ABI header values */
 	cdata->data->magic = SOF_ABI_MAGIC;
 	cdata->data->abi = SOF_ABI_VERSION;

 	/* Prevent read of other kernel data or possibly corrupt response */
 	data_size = cdata->data->size + sizeof(const struct sof_abi_hdr);

 	/* check data size doesn't exceed max coming from topology */
 	if (data_size > be->max) {
 		dev_err_ratelimited(scomp->dev, "error: user data size %d exceeds max size %d.\n",
 				    data_size, be->max);
 		ret = -EINVAL;
 		goto out;
 	}

 	header.numid = scontrol->cmd;
 	header.length = data_size;
 	if (copy_to_user(tlvd, &header, sizeof(const struct snd_ctl_tlv))) {
 		ret = -EFAULT;
 		goto out;
 	}

 	if (copy_to_user(tlvd->tlv, cdata->data, data_size))
 		ret = -EFAULT;

 out:
 	return ret;
 }
	// 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) 2018 Intel Corporation. All rights reserved.
	//
	// Author: Liam Girdwood <liam.r.girdwood@linux.intel.com>
	//

	/* Mixer Controls */

	#include <linux/pm_runtime.h>
	#include <linux/leds.h>
	#include "sof-priv.h"
	#include "sof-audio.h"

	static void update_mute_led(struct snd_sof_control *scontrol,
	struct snd_kcontrol *kcontrol,
	struct snd_ctl_elem_value *ucontrol)
	{
	int temp = 0;
	int mask;
	int i;

	mask = 1U << snd_ctl_get_ioffidx(kcontrol, &ucontrol->id);

	for (i = 0; i < scontrol->num_channels; i++) {
	if (ucontrol->value.integer.value[i]) {
	temp \|= mask;
	break;
	}
	}

	if (temp == scontrol->led_ctl.led_value)
	return;

	scontrol->led_ctl.led_value = temp;

	#if IS_REACHABLE(CONFIG_LEDS_TRIGGER_AUDIO)
	if (!scontrol->led_ctl.direction)
	ledtrig_audio_set(LED_AUDIO_MUTE, temp ? LED_OFF : LED_ON);
	else
	ledtrig_audio_set(LED_AUDIO_MICMUTE, temp ? LED_OFF : LED_ON);
	#endif
	}

	static inline u32 mixer_to_ipc(unsigned int value, u32 *volume_map, int size)
	{
	if (value >= size)
	return volume_map[size - 1];

	return volume_map[value];
	}

	static inline u32 ipc_to_mixer(u32 value, u32 *volume_map, int size)
	{
	int i;

	for (i = 0; i < size; i++) {
	if (volume_map[i] >= value)
	return i;
	}

	return i - 1;
	}

	int snd_sof_volume_get(struct snd_kcontrol *kcontrol,
	struct snd_ctl_elem_value *ucontrol)
	{
	struct soc_mixer_control *sm =
	(struct soc_mixer_control *)kcontrol->private_value;
	struct snd_sof_control *scontrol = sm->dobj.private;
	struct sof_ipc_ctrl_data *cdata = scontrol->control_data;
	unsigned int i, channels = scontrol->num_channels;

	/* read back each channel */
	for (i = 0; i < channels; i++)
	ucontrol->value.integer.value[i] =
	ipc_to_mixer(cdata->chanv[i].value,
	scontrol->volume_table, sm->max + 1);

	return 0;
	}

	int snd_sof_volume_put(struct snd_kcontrol *kcontrol,
	struct snd_ctl_elem_value *ucontrol)
	{
	struct soc_mixer_control *sm =
	(struct soc_mixer_control *)kcontrol->private_value;
	struct snd_sof_control *scontrol = sm->dobj.private;
	struct snd_soc_component *scomp = scontrol->scomp;
	struct sof_ipc_ctrl_data *cdata = scontrol->control_data;
	unsigned int i, channels = scontrol->num_channels;
	bool change = false;
	u32 value;

	/* update each channel */
	for (i = 0; i < channels; i++) {
	value = mixer_to_ipc(ucontrol->value.integer.value[i],
	scontrol->volume_table, sm->max + 1);
	change = change \|\| (value != cdata->chanv[i].value);
	cdata->chanv[i].channel = i;
	cdata->chanv[i].value = value;
	}

	/* notify DSP of mixer updates */
	if (pm_runtime_active(scomp->dev))
	snd_sof_ipc_set_get_comp_data(scontrol,
	SOF_IPC_COMP_SET_VALUE,
	SOF_CTRL_TYPE_VALUE_CHAN_GET,
	SOF_CTRL_CMD_VOLUME,
	true);
	return change;
	}

	int snd_sof_switch_get(struct snd_kcontrol *kcontrol,
	struct snd_ctl_elem_value *ucontrol)
	{
	struct soc_mixer_control *sm =
	(struct soc_mixer_control *)kcontrol->private_value;
	struct snd_sof_control *scontrol = sm->dobj.private;
	struct sof_ipc_ctrl_data *cdata = scontrol->control_data;
	unsigned int i, channels = scontrol->num_channels;

	/* read back each channel */
	for (i = 0; i < channels; i++)
	ucontrol->value.integer.value[i] = cdata->chanv[i].value;

	return 0;
	}

	int snd_sof_switch_put(struct snd_kcontrol *kcontrol,
	struct snd_ctl_elem_value *ucontrol)
	{
	struct soc_mixer_control *sm =
	(struct soc_mixer_control *)kcontrol->private_value;
	struct snd_sof_control *scontrol = sm->dobj.private;
	struct snd_soc_component *scomp = scontrol->scomp;
	struct sof_ipc_ctrl_data *cdata = scontrol->control_data;
	unsigned int i, channels = scontrol->num_channels;
	bool change = false;
	u32 value;

	/* update each channel */
	for (i = 0; i < channels; i++) {
	value = ucontrol->value.integer.value[i];
	change = change \|\| (value != cdata->chanv[i].value);
	cdata->chanv[i].channel = i;
	cdata->chanv[i].value = value;
	}

	if (scontrol->led_ctl.use_led)
	update_mute_led(scontrol, kcontrol, ucontrol);

	/* notify DSP of mixer updates */
	if (pm_runtime_active(scomp->dev))
	snd_sof_ipc_set_get_comp_data(scontrol,
	SOF_IPC_COMP_SET_VALUE,
	SOF_CTRL_TYPE_VALUE_CHAN_GET,
	SOF_CTRL_CMD_SWITCH,
	true);

	return change;
	}

	int snd_sof_enum_get(struct snd_kcontrol *kcontrol,
	struct snd_ctl_elem_value *ucontrol)
	{
	struct soc_enum *se =
	(struct soc_enum *)kcontrol->private_value;
	struct snd_sof_control *scontrol = se->dobj.private;
	struct sof_ipc_ctrl_data *cdata = scontrol->control_data;
	unsigned int i, channels = scontrol->num_channels;

	/* read back each channel */
	for (i = 0; i < channels; i++)
	ucontrol->value.enumerated.item[i] = cdata->chanv[i].value;

	return 0;
	}

	int snd_sof_enum_put(struct snd_kcontrol *kcontrol,
	struct snd_ctl_elem_value *ucontrol)
	{
	struct soc_enum *se =
	(struct soc_enum *)kcontrol->private_value;
	struct snd_sof_control *scontrol = se->dobj.private;
	struct snd_soc_component *scomp = scontrol->scomp;
	struct sof_ipc_ctrl_data *cdata = scontrol->control_data;
	unsigned int i, channels = scontrol->num_channels;
	bool change = false;
	u32 value;

	/* update each channel */
	for (i = 0; i < channels; i++) {
	value = ucontrol->value.enumerated.item[i];
	change = change \|\| (value != cdata->chanv[i].value);
	cdata->chanv[i].channel = i;
	cdata->chanv[i].value = value;
	}

	/* notify DSP of enum updates */
	if (pm_runtime_active(scomp->dev))
	snd_sof_ipc_set_get_comp_data(scontrol,
	SOF_IPC_COMP_SET_VALUE,
	SOF_CTRL_TYPE_VALUE_CHAN_GET,
	SOF_CTRL_CMD_ENUM,
	true);

	return change;
	}

	int snd_sof_bytes_get(struct snd_kcontrol *kcontrol,
	struct snd_ctl_elem_value *ucontrol)
	{
	struct soc_bytes_ext *be =
	(struct soc_bytes_ext *)kcontrol->private_value;
	struct snd_sof_control *scontrol = be->dobj.private;
	struct snd_soc_component *scomp = scontrol->scomp;
	struct sof_ipc_ctrl_data *cdata = scontrol->control_data;
	struct sof_abi_hdr *data = cdata->data;
	size_t size;
	int ret = 0;

	if (be->max > sizeof(ucontrol->value.bytes.data)) {
	dev_err_ratelimited(scomp->dev,
	"error: data max %d exceeds ucontrol data array size\n",
	be->max);
	return -EINVAL;
	}

	size = data->size + sizeof(*data);
	if (size > be->max) {
	dev_err_ratelimited(scomp->dev,
	"error: DSP sent %zu bytes max is %d\n",
	size, be->max);
	ret = -EINVAL;
	goto out;
	}

	/* copy back to kcontrol */
	memcpy(ucontrol->value.bytes.data, data, size);

	out:
	return ret;
	}

	int snd_sof_bytes_put(struct snd_kcontrol *kcontrol,
	struct snd_ctl_elem_value *ucontrol)
	{
	struct soc_bytes_ext *be =
	(struct soc_bytes_ext *)kcontrol->private_value;
	struct snd_sof_control *scontrol = be->dobj.private;
	struct snd_soc_component *scomp = scontrol->scomp;
	struct sof_ipc_ctrl_data *cdata = scontrol->control_data;
	struct sof_abi_hdr *data = cdata->data;
	size_t size = data->size + sizeof(*data);

	if (be->max > sizeof(ucontrol->value.bytes.data)) {
	dev_err_ratelimited(scomp->dev,
	"error: data max %d exceeds ucontrol data array size\n",
	be->max);
	return -EINVAL;
	}

	if (size > be->max) {
	dev_err_ratelimited(scomp->dev,
	"error: size too big %zu bytes max is %d\n",
	size, be->max);
	return -EINVAL;
	}

	/* copy from kcontrol */
	memcpy(data, ucontrol->value.bytes.data, size);

	/* notify DSP of byte control updates */
	if (pm_runtime_active(scomp->dev))
	snd_sof_ipc_set_get_comp_data(scontrol,
	SOF_IPC_COMP_SET_DATA,
	SOF_CTRL_TYPE_DATA_SET,
	scontrol->cmd,
	true);

	return 0;
	}

	int snd_sof_bytes_ext_put(struct snd_kcontrol *kcontrol,
	const unsigned int __user *binary_data,
	unsigned int size)
	{
	struct soc_bytes_ext *be =
	(struct soc_bytes_ext *)kcontrol->private_value;
	struct snd_sof_control *scontrol = be->dobj.private;
	struct snd_soc_component *scomp = scontrol->scomp;
	struct sof_ipc_ctrl_data *cdata = scontrol->control_data;
	struct snd_ctl_tlv header;
	const struct snd_ctl_tlv __user *tlvd =
	(const struct snd_ctl_tlv __user *)binary_data;

	/*
	* The beginning of bytes data contains a header from where
	* the length (as bytes) is needed to know the correct copy
	* length of data from tlvd->tlv.
	*/
	if (copy_from_user(&header, tlvd, sizeof(const struct snd_ctl_tlv)))
	return -EFAULT;

	/* be->max is coming from topology */
	if (header.length > be->max) {
	dev_err_ratelimited(scomp->dev, "error: Bytes data size %d exceeds max %d.\n",
	header.length, be->max);
	return -EINVAL;
	}

	/* Check that header id matches the command */
	if (header.numid != scontrol->cmd) {
	dev_err_ratelimited(scomp->dev,
	"error: incorrect numid %d\n",
	header.numid);
	return -EINVAL;
	}

	if (copy_from_user(cdata->data, tlvd->tlv, header.length))
	return -EFAULT;

	if (cdata->data->magic != SOF_ABI_MAGIC) {
	dev_err_ratelimited(scomp->dev,
	"error: Wrong ABI magic 0x%08x.\n",
	cdata->data->magic);
	return -EINVAL;
	}

	if (SOF_ABI_VERSION_INCOMPATIBLE(SOF_ABI_VERSION, cdata->data->abi)) {
	dev_err_ratelimited(scomp->dev, "error: Incompatible ABI version 0x%08x.\n",
	cdata->data->abi);
	return -EINVAL;
	}

	if (cdata->data->size + sizeof(const struct sof_abi_hdr) > be->max) {
	dev_err_ratelimited(scomp->dev, "error: Mismatch in ABI data size (truncated?).\n");
	return -EINVAL;
	}

	/* notify DSP of byte control updates */
	if (pm_runtime_active(scomp->dev))
	snd_sof_ipc_set_get_comp_data(scontrol,
	SOF_IPC_COMP_SET_DATA,
	SOF_CTRL_TYPE_DATA_SET,
	scontrol->cmd,
	true);

	return 0;
	}

	int snd_sof_bytes_ext_get(struct snd_kcontrol *kcontrol,
	unsigned int __user *binary_data,
	unsigned int size)
	{
	struct soc_bytes_ext *be =
	(struct soc_bytes_ext *)kcontrol->private_value;
	struct snd_sof_control *scontrol = be->dobj.private;
	struct snd_soc_component *scomp = scontrol->scomp;
	struct sof_ipc_ctrl_data *cdata = scontrol->control_data;
	struct snd_ctl_tlv header;
	struct snd_ctl_tlv __user *tlvd =
	(struct snd_ctl_tlv __user *)binary_data;
	int data_size;
	int ret = 0;

	/*
	* Decrement the limit by ext bytes header size to
	* ensure the user space buffer is not exceeded.
	*/
	size -= sizeof(const struct snd_ctl_tlv);

	/* set the ABI header values */
	cdata->data->magic = SOF_ABI_MAGIC;
	cdata->data->abi = SOF_ABI_VERSION;

	/* Prevent read of other kernel data or possibly corrupt response */
	data_size = cdata->data->size + sizeof(const struct sof_abi_hdr);

	/* check data size doesn't exceed max coming from topology */
	if (data_size > be->max) {
	dev_err_ratelimited(scomp->dev, "error: user data size %d exceeds max size %d.\n",
	data_size, be->max);
	ret = -EINVAL;
	goto out;
	}

	header.numid = scontrol->cmd;
	header.length = data_size;
	if (copy_to_user(tlvd, &header, sizeof(const struct snd_ctl_tlv))) {
	ret = -EFAULT;
	goto out;
	}

	if (copy_to_user(tlvd->tlv, cdata->data, data_size))
	ret = -EFAULT;

	out:
	return ret;
	}