linux/sound/soc/sof/control.c

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// 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;
}
ASoC: SOF: Handle control change notification from firmware If the value/data associated with a control changes in SOF it will send a notification (SOF_IPC_GLB_COMP_MSG with SOF_IPC_COMP_GET_VALUE/DATA). We have support for binary volatile control type, but we might have features where enum/switch/volume changes. Re-implementing everything as volatile as well would be not much of a gain for several reasons: - volatile controls would do an IPC all the time, regardless if there is a need or not. - We still don't have notification which forces userspace to continuously poll. When such notification arrives we use snd_ctl_notify_one() to signal userspace about the change. The kernel is prepared for two types of notification: - the notification carries the new data for the control (num_elems != 0) The new value/data is copied to the control's local data - blank message about a change The new flag for the scontrol (comp_data_dirty) is set and when next time user space reads the value via the kcontrol's get callback we will refresh the control's local data from the firmware. Signed-off-by: Peter Ujfalusi <peter.ujfalusi@linux.intel.com> Reviewed-by: Kai Vehmanen <kai.vehmanen@linux.intel.com> Reviewed-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com> Reviewed-by: Guennadi Liakhovetski <guennadi.liakhovetski@linux.intel.com> Tested-by: Seppo Ingalsuo <seppo.ingalsuo@linux.intel.com> Link: https://lore.kernel.org/r/20210903114018.2962-1-peter.ujfalusi@linux.intel.com Signed-off-by: Mark Brown <broonie@kernel.org>
2021-09-03 11:40:18 +00:00
static void snd_sof_refresh_control(struct snd_sof_control *scontrol)
{
struct sof_ipc_ctrl_data *cdata = scontrol->control_data;
struct snd_soc_component *scomp = scontrol->scomp;
enum sof_ipc_ctrl_type ctrl_type;
int ret;
if (!scontrol->comp_data_dirty)
return;
if (!pm_runtime_active(scomp->dev))
return;
if (scontrol->cmd == SOF_CTRL_CMD_BINARY)
ctrl_type = SOF_IPC_COMP_GET_DATA;
else
ctrl_type = SOF_IPC_COMP_GET_VALUE;
/* set the ABI header values */
cdata->data->magic = SOF_ABI_MAGIC;
cdata->data->abi = SOF_ABI_VERSION;
/* refresh the component data from DSP */
scontrol->comp_data_dirty = false;
ret = snd_sof_ipc_set_get_comp_data(scontrol, ctrl_type,
SOF_CTRL_TYPE_VALUE_CHAN_GET,
scontrol->cmd, false);
if (ret < 0) {
dev_err(scomp->dev, "error: failed to get control data: %d\n", ret);
/* Set the flag to re-try next time to get the data */
scontrol->comp_data_dirty = true;
}
}
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;
ASoC: SOF: Handle control change notification from firmware If the value/data associated with a control changes in SOF it will send a notification (SOF_IPC_GLB_COMP_MSG with SOF_IPC_COMP_GET_VALUE/DATA). We have support for binary volatile control type, but we might have features where enum/switch/volume changes. Re-implementing everything as volatile as well would be not much of a gain for several reasons: - volatile controls would do an IPC all the time, regardless if there is a need or not. - We still don't have notification which forces userspace to continuously poll. When such notification arrives we use snd_ctl_notify_one() to signal userspace about the change. The kernel is prepared for two types of notification: - the notification carries the new data for the control (num_elems != 0) The new value/data is copied to the control's local data - blank message about a change The new flag for the scontrol (comp_data_dirty) is set and when next time user space reads the value via the kcontrol's get callback we will refresh the control's local data from the firmware. Signed-off-by: Peter Ujfalusi <peter.ujfalusi@linux.intel.com> Reviewed-by: Kai Vehmanen <kai.vehmanen@linux.intel.com> Reviewed-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com> Reviewed-by: Guennadi Liakhovetski <guennadi.liakhovetski@linux.intel.com> Tested-by: Seppo Ingalsuo <seppo.ingalsuo@linux.intel.com> Link: https://lore.kernel.org/r/20210903114018.2962-1-peter.ujfalusi@linux.intel.com Signed-off-by: Mark Brown <broonie@kernel.org>
2021-09-03 11:40:18 +00:00
snd_sof_refresh_control(scontrol);
/* 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_SET,
SOF_CTRL_CMD_VOLUME,
true);
return change;
}
int snd_sof_volume_info(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_info *uinfo)
{
struct soc_mixer_control *sm = (struct soc_mixer_control *)kcontrol->private_value;
struct snd_sof_control *scontrol = sm->dobj.private;
unsigned int channels = scontrol->num_channels;
int platform_max;
if (!sm->platform_max)
sm->platform_max = sm->max;
platform_max = sm->platform_max;
if (platform_max == 1 && !strstr(kcontrol->id.name, " Volume"))
uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
else
uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
uinfo->count = channels;
uinfo->value.integer.min = 0;
uinfo->value.integer.max = platform_max - sm->min;
return 0;
}
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;
ASoC: SOF: Handle control change notification from firmware If the value/data associated with a control changes in SOF it will send a notification (SOF_IPC_GLB_COMP_MSG with SOF_IPC_COMP_GET_VALUE/DATA). We have support for binary volatile control type, but we might have features where enum/switch/volume changes. Re-implementing everything as volatile as well would be not much of a gain for several reasons: - volatile controls would do an IPC all the time, regardless if there is a need or not. - We still don't have notification which forces userspace to continuously poll. When such notification arrives we use snd_ctl_notify_one() to signal userspace about the change. The kernel is prepared for two types of notification: - the notification carries the new data for the control (num_elems != 0) The new value/data is copied to the control's local data - blank message about a change The new flag for the scontrol (comp_data_dirty) is set and when next time user space reads the value via the kcontrol's get callback we will refresh the control's local data from the firmware. Signed-off-by: Peter Ujfalusi <peter.ujfalusi@linux.intel.com> Reviewed-by: Kai Vehmanen <kai.vehmanen@linux.intel.com> Reviewed-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com> Reviewed-by: Guennadi Liakhovetski <guennadi.liakhovetski@linux.intel.com> Tested-by: Seppo Ingalsuo <seppo.ingalsuo@linux.intel.com> Link: https://lore.kernel.org/r/20210903114018.2962-1-peter.ujfalusi@linux.intel.com Signed-off-by: Mark Brown <broonie@kernel.org>
2021-09-03 11:40:18 +00:00
snd_sof_refresh_control(scontrol);
/* 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_SET,
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;
ASoC: SOF: Handle control change notification from firmware If the value/data associated with a control changes in SOF it will send a notification (SOF_IPC_GLB_COMP_MSG with SOF_IPC_COMP_GET_VALUE/DATA). We have support for binary volatile control type, but we might have features where enum/switch/volume changes. Re-implementing everything as volatile as well would be not much of a gain for several reasons: - volatile controls would do an IPC all the time, regardless if there is a need or not. - We still don't have notification which forces userspace to continuously poll. When such notification arrives we use snd_ctl_notify_one() to signal userspace about the change. The kernel is prepared for two types of notification: - the notification carries the new data for the control (num_elems != 0) The new value/data is copied to the control's local data - blank message about a change The new flag for the scontrol (comp_data_dirty) is set and when next time user space reads the value via the kcontrol's get callback we will refresh the control's local data from the firmware. Signed-off-by: Peter Ujfalusi <peter.ujfalusi@linux.intel.com> Reviewed-by: Kai Vehmanen <kai.vehmanen@linux.intel.com> Reviewed-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com> Reviewed-by: Guennadi Liakhovetski <guennadi.liakhovetski@linux.intel.com> Tested-by: Seppo Ingalsuo <seppo.ingalsuo@linux.intel.com> Link: https://lore.kernel.org/r/20210903114018.2962-1-peter.ujfalusi@linux.intel.com Signed-off-by: Mark Brown <broonie@kernel.org>
2021-09-03 11:40:18 +00:00
snd_sof_refresh_control(scontrol);
/* 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_SET,
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;
ASoC: SOF: Handle control change notification from firmware If the value/data associated with a control changes in SOF it will send a notification (SOF_IPC_GLB_COMP_MSG with SOF_IPC_COMP_GET_VALUE/DATA). We have support for binary volatile control type, but we might have features where enum/switch/volume changes. Re-implementing everything as volatile as well would be not much of a gain for several reasons: - volatile controls would do an IPC all the time, regardless if there is a need or not. - We still don't have notification which forces userspace to continuously poll. When such notification arrives we use snd_ctl_notify_one() to signal userspace about the change. The kernel is prepared for two types of notification: - the notification carries the new data for the control (num_elems != 0) The new value/data is copied to the control's local data - blank message about a change The new flag for the scontrol (comp_data_dirty) is set and when next time user space reads the value via the kcontrol's get callback we will refresh the control's local data from the firmware. Signed-off-by: Peter Ujfalusi <peter.ujfalusi@linux.intel.com> Reviewed-by: Kai Vehmanen <kai.vehmanen@linux.intel.com> Reviewed-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com> Reviewed-by: Guennadi Liakhovetski <guennadi.liakhovetski@linux.intel.com> Tested-by: Seppo Ingalsuo <seppo.ingalsuo@linux.intel.com> Link: https://lore.kernel.org/r/20210903114018.2962-1-peter.ujfalusi@linux.intel.com Signed-off-by: Mark Brown <broonie@kernel.org>
2021-09-03 11:40:18 +00:00
snd_sof_refresh_control(scontrol);
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;
}
/* be->max has been verified to be >= sizeof(struct sof_abi_hdr) */
if (data->size > be->max - sizeof(*data)) {
dev_err_ratelimited(scomp->dev,
"error: %u bytes of control data is invalid, max is %zu\n",
data->size, be->max - sizeof(*data));
return -EINVAL;
}
size = data->size + sizeof(*data);
/* copy back to kcontrol */
memcpy(ucontrol->value.bytes.data, data, size);
return 0;
}
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;
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;
}
/* be->max has been verified to be >= sizeof(struct sof_abi_hdr) */
if (data->size > be->max - sizeof(*data)) {
dev_err_ratelimited(scomp->dev,
"error: data size too big %u bytes max is %zu\n",
data->size, be->max - sizeof(*data));
return -EINVAL;
}
size = data->size + sizeof(*data);
/* 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;
/* make sure we have at least a header */
if (size < sizeof(struct snd_ctl_tlv))
return -EINVAL;
/*
* 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(struct snd_ctl_tlv)))
return -EFAULT;
/* make sure TLV info is consistent */
if (header.length + sizeof(struct snd_ctl_tlv) > size) {
dev_err_ratelimited(scomp->dev, "error: inconsistent TLV, data %d + header %zu > %d\n",
header.length, sizeof(struct snd_ctl_tlv), size);
return -EINVAL;
}
/* 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;
}
/* be->max has been verified to be >= sizeof(struct sof_abi_hdr) */
if (cdata->data->size > be->max - sizeof(struct sof_abi_hdr)) {
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_volatile_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;
size_t data_size;
int ret;
int err;
/*
* Decrement the limit by ext bytes header size to
* ensure the user space buffer is not exceeded.
*/
if (size < sizeof(struct snd_ctl_tlv))
return -ENOSPC;
size -= sizeof(struct snd_ctl_tlv);
ret = pm_runtime_get_sync(scomp->dev);
if (ret < 0 && ret != -EACCES) {
dev_err_ratelimited(scomp->dev, "error: bytes_ext get failed to resume %d\n", ret);
pm_runtime_put_noidle(scomp->dev);
return ret;
}
/* set the ABI header values */
cdata->data->magic = SOF_ABI_MAGIC;
cdata->data->abi = SOF_ABI_VERSION;
/* get all the component data from DSP */
ret = snd_sof_ipc_set_get_comp_data(scontrol, SOF_IPC_COMP_GET_DATA, SOF_CTRL_TYPE_DATA_GET,
scontrol->cmd, false);
if (ret < 0)
goto out;
/* check data size doesn't exceed max coming from topology */
if (cdata->data->size > be->max - sizeof(struct sof_abi_hdr)) {
dev_err_ratelimited(scomp->dev, "error: user data size %d exceeds max size %zu.\n",
cdata->data->size,
be->max - sizeof(struct sof_abi_hdr));
ret = -EINVAL;
goto out;
}
data_size = cdata->data->size + sizeof(struct sof_abi_hdr);
/* make sure we don't exceed size provided by user space for data */
if (data_size > size) {
ret = -ENOSPC;
goto out;
}
header.numid = scontrol->cmd;
header.length = data_size;
if (copy_to_user(tlvd, &header, sizeof(struct snd_ctl_tlv))) {
ret = -EFAULT;
goto out;
}
if (copy_to_user(tlvd->tlv, cdata->data, data_size))
ret = -EFAULT;
out:
pm_runtime_mark_last_busy(scomp->dev);
err = pm_runtime_put_autosuspend(scomp->dev);
if (err < 0)
dev_err_ratelimited(scomp->dev, "error: bytes_ext get failed to idle %d\n", err);
return ret;
}
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;
size_t data_size;
ASoC: SOF: Handle control change notification from firmware If the value/data associated with a control changes in SOF it will send a notification (SOF_IPC_GLB_COMP_MSG with SOF_IPC_COMP_GET_VALUE/DATA). We have support for binary volatile control type, but we might have features where enum/switch/volume changes. Re-implementing everything as volatile as well would be not much of a gain for several reasons: - volatile controls would do an IPC all the time, regardless if there is a need or not. - We still don't have notification which forces userspace to continuously poll. When such notification arrives we use snd_ctl_notify_one() to signal userspace about the change. The kernel is prepared for two types of notification: - the notification carries the new data for the control (num_elems != 0) The new value/data is copied to the control's local data - blank message about a change The new flag for the scontrol (comp_data_dirty) is set and when next time user space reads the value via the kcontrol's get callback we will refresh the control's local data from the firmware. Signed-off-by: Peter Ujfalusi <peter.ujfalusi@linux.intel.com> Reviewed-by: Kai Vehmanen <kai.vehmanen@linux.intel.com> Reviewed-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com> Reviewed-by: Guennadi Liakhovetski <guennadi.liakhovetski@linux.intel.com> Tested-by: Seppo Ingalsuo <seppo.ingalsuo@linux.intel.com> Link: https://lore.kernel.org/r/20210903114018.2962-1-peter.ujfalusi@linux.intel.com Signed-off-by: Mark Brown <broonie@kernel.org>
2021-09-03 11:40:18 +00:00
snd_sof_refresh_control(scontrol);
/*
* Decrement the limit by ext bytes header size to
* ensure the user space buffer is not exceeded.
*/
if (size < sizeof(struct snd_ctl_tlv))
return -ENOSPC;
size -= sizeof(struct snd_ctl_tlv);
/* set the ABI header values */
cdata->data->magic = SOF_ABI_MAGIC;
cdata->data->abi = SOF_ABI_VERSION;
/* check data size doesn't exceed max coming from topology */
if (cdata->data->size > be->max - sizeof(struct sof_abi_hdr)) {
dev_err_ratelimited(scomp->dev, "error: user data size %d exceeds max size %zu.\n",
cdata->data->size,
be->max - sizeof(struct sof_abi_hdr));
return -EINVAL;
}
data_size = cdata->data->size + sizeof(struct sof_abi_hdr);
/* make sure we don't exceed size provided by user space for data */
if (data_size > size)
return -ENOSPC;
header.numid = scontrol->cmd;
header.length = data_size;
if (copy_to_user(tlvd, &header, sizeof(struct snd_ctl_tlv)))
return -EFAULT;
if (copy_to_user(tlvd->tlv, cdata->data, data_size))
return -EFAULT;
return 0;
}
ASoC: SOF: Handle control change notification from firmware If the value/data associated with a control changes in SOF it will send a notification (SOF_IPC_GLB_COMP_MSG with SOF_IPC_COMP_GET_VALUE/DATA). We have support for binary volatile control type, but we might have features where enum/switch/volume changes. Re-implementing everything as volatile as well would be not much of a gain for several reasons: - volatile controls would do an IPC all the time, regardless if there is a need or not. - We still don't have notification which forces userspace to continuously poll. When such notification arrives we use snd_ctl_notify_one() to signal userspace about the change. The kernel is prepared for two types of notification: - the notification carries the new data for the control (num_elems != 0) The new value/data is copied to the control's local data - blank message about a change The new flag for the scontrol (comp_data_dirty) is set and when next time user space reads the value via the kcontrol's get callback we will refresh the control's local data from the firmware. Signed-off-by: Peter Ujfalusi <peter.ujfalusi@linux.intel.com> Reviewed-by: Kai Vehmanen <kai.vehmanen@linux.intel.com> Reviewed-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com> Reviewed-by: Guennadi Liakhovetski <guennadi.liakhovetski@linux.intel.com> Tested-by: Seppo Ingalsuo <seppo.ingalsuo@linux.intel.com> Link: https://lore.kernel.org/r/20210903114018.2962-1-peter.ujfalusi@linux.intel.com Signed-off-by: Mark Brown <broonie@kernel.org>
2021-09-03 11:40:18 +00:00
static void snd_sof_update_control(struct snd_sof_control *scontrol,
struct sof_ipc_ctrl_data *cdata)
{
struct snd_soc_component *scomp = scontrol->scomp;
struct sof_ipc_ctrl_data *local_cdata;
int i;
local_cdata = scontrol->control_data;
if (cdata->cmd == SOF_CTRL_CMD_BINARY) {
if (cdata->num_elems != local_cdata->data->size) {
dev_err(scomp->dev,
"error: cdata binary size mismatch %u - %u\n",
cdata->num_elems, local_cdata->data->size);
return;
}
/* copy the new binary data */
memcpy(local_cdata->data, cdata->data, cdata->num_elems);
} else if (cdata->num_elems != scontrol->num_channels) {
dev_err(scomp->dev,
"error: cdata channel count mismatch %u - %d\n",
cdata->num_elems, scontrol->num_channels);
} else {
/* copy the new values */
for (i = 0; i < cdata->num_elems; i++)
local_cdata->chanv[i].value = cdata->chanv[i].value;
}
}
void snd_sof_control_notify(struct snd_sof_dev *sdev,
struct sof_ipc_ctrl_data *cdata)
{
struct snd_soc_dapm_widget *widget;
struct snd_sof_control *scontrol;
struct snd_sof_widget *swidget;
struct snd_kcontrol *kc = NULL;
struct soc_mixer_control *sm;
struct soc_bytes_ext *be;
size_t expected_size;
struct soc_enum *se;
bool found = false;
int i, type;
/* Find the swidget first */
list_for_each_entry(swidget, &sdev->widget_list, list) {
if (swidget->comp_id == cdata->comp_id) {
found = true;
break;
}
}
if (!found)
return;
/* Translate SOF cmd to TPLG type */
switch (cdata->cmd) {
case SOF_CTRL_CMD_VOLUME:
case SOF_CTRL_CMD_SWITCH:
type = SND_SOC_TPLG_TYPE_MIXER;
break;
case SOF_CTRL_CMD_BINARY:
type = SND_SOC_TPLG_TYPE_BYTES;
break;
case SOF_CTRL_CMD_ENUM:
type = SND_SOC_TPLG_TYPE_ENUM;
break;
default:
dev_err(sdev->dev, "error: unknown cmd %u\n", cdata->cmd);
return;
}
widget = swidget->widget;
for (i = 0; i < widget->num_kcontrols; i++) {
/* skip non matching types or non matching indexes within type */
if (widget->dobj.widget.kcontrol_type[i] == type &&
widget->kcontrol_news[i].index == cdata->index) {
kc = widget->kcontrols[i];
break;
}
}
if (!kc)
return;
switch (cdata->cmd) {
case SOF_CTRL_CMD_VOLUME:
case SOF_CTRL_CMD_SWITCH:
sm = (struct soc_mixer_control *)kc->private_value;
scontrol = sm->dobj.private;
break;
case SOF_CTRL_CMD_BINARY:
be = (struct soc_bytes_ext *)kc->private_value;
scontrol = be->dobj.private;
break;
case SOF_CTRL_CMD_ENUM:
se = (struct soc_enum *)kc->private_value;
scontrol = se->dobj.private;
break;
default:
return;
}
expected_size = sizeof(struct sof_ipc_ctrl_data);
switch (cdata->type) {
case SOF_CTRL_TYPE_VALUE_CHAN_GET:
case SOF_CTRL_TYPE_VALUE_CHAN_SET:
expected_size += cdata->num_elems *
sizeof(struct sof_ipc_ctrl_value_chan);
break;
case SOF_CTRL_TYPE_VALUE_COMP_GET:
case SOF_CTRL_TYPE_VALUE_COMP_SET:
expected_size += cdata->num_elems *
sizeof(struct sof_ipc_ctrl_value_comp);
break;
case SOF_CTRL_TYPE_DATA_GET:
case SOF_CTRL_TYPE_DATA_SET:
expected_size += cdata->num_elems + sizeof(struct sof_abi_hdr);
break;
default:
return;
}
if (cdata->rhdr.hdr.size != expected_size) {
dev_err(sdev->dev, "error: component notification size mismatch\n");
return;
}
if (cdata->num_elems)
/*
* The message includes the updated value/data, update the
* control's local cache using the received notification
*/
snd_sof_update_control(scontrol, cdata);
else
/* Mark the scontrol that the value/data is changed in SOF */
scontrol->comp_data_dirty = true;
snd_ctl_notify_one(swidget->scomp->card->snd_card,
SNDRV_CTL_EVENT_MASK_VALUE, kc, 0);
}