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kernel/sound/soc/sof/core.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
//
// Author: Liam Girdwood <liam.r.girdwood@linux.intel.com>
//
#include <linux/firmware.h>
#include <linux/module.h>
#include <sound/soc.h>
#include <sound/sof.h>
#include "sof-priv.h"
#include "sof-of-dev.h"
#include "ops.h"
#define CREATE_TRACE_POINTS
#include <trace/events/sof.h>
/* see SOF_DBG_ flags */
static int sof_core_debug = IS_ENABLED(CONFIG_SND_SOC_SOF_DEBUG_ENABLE_FIRMWARE_TRACE);
module_param_named(sof_debug, sof_core_debug, int, 0444);
MODULE_PARM_DESC(sof_debug, "SOF core debug options (0x0 all off)");
/* SOF defaults if not provided by the platform in ms */
#define TIMEOUT_DEFAULT_IPC_MS 500
#define TIMEOUT_DEFAULT_BOOT_MS 2000
/**
* sof_debug_check_flag - check if a given flag(s) is set in sof_core_debug
* @mask: Flag or combination of flags to check
*
* Returns true if all bits set in mask is also set in sof_core_debug, otherwise
* false
*/
bool sof_debug_check_flag(int mask)
{
if ((sof_core_debug & mask) == mask)
return true;
return false;
}
EXPORT_SYMBOL(sof_debug_check_flag);
/*
* FW Panic/fault handling.
*/
struct sof_panic_msg {
u32 id;
const char *msg;
};
/* standard FW panic types */
static const struct sof_panic_msg panic_msg[] = {
{SOF_IPC_PANIC_MEM, "out of memory"},
{SOF_IPC_PANIC_WORK, "work subsystem init failed"},
{SOF_IPC_PANIC_IPC, "IPC subsystem init failed"},
{SOF_IPC_PANIC_ARCH, "arch init failed"},
{SOF_IPC_PANIC_PLATFORM, "platform init failed"},
{SOF_IPC_PANIC_TASK, "scheduler init failed"},
{SOF_IPC_PANIC_EXCEPTION, "runtime exception"},
{SOF_IPC_PANIC_DEADLOCK, "deadlock"},
{SOF_IPC_PANIC_STACK, "stack overflow"},
{SOF_IPC_PANIC_IDLE, "can't enter idle"},
{SOF_IPC_PANIC_WFI, "invalid wait state"},
{SOF_IPC_PANIC_ASSERT, "assertion failed"},
};
/**
* sof_print_oops_and_stack - Handle the printing of DSP oops and stack trace
* @sdev: Pointer to the device's sdev
* @level: prink log level to use for the printing
* @panic_code: the panic code
* @tracep_code: tracepoint code
* @oops: Pointer to DSP specific oops data
* @panic_info: Pointer to the received panic information message
* @stack: Pointer to the call stack data
* @stack_words: Number of words in the stack data
*
* helper to be called from .dbg_dump callbacks. No error code is
* provided, it's left as an exercise for the caller of .dbg_dump
* (typically IPC or loader)
*/
void sof_print_oops_and_stack(struct snd_sof_dev *sdev, const char *level,
u32 panic_code, u32 tracep_code, void *oops,
struct sof_ipc_panic_info *panic_info,
void *stack, size_t stack_words)
{
u32 code;
int i;
/* is firmware dead ? */
if ((panic_code & SOF_IPC_PANIC_MAGIC_MASK) != SOF_IPC_PANIC_MAGIC) {
dev_printk(level, sdev->dev, "unexpected fault %#010x trace %#010x\n",
panic_code, tracep_code);
return; /* no fault ? */
}
code = panic_code & (SOF_IPC_PANIC_MAGIC_MASK | SOF_IPC_PANIC_CODE_MASK);
for (i = 0; i < ARRAY_SIZE(panic_msg); i++) {
if (panic_msg[i].id == code) {
dev_printk(level, sdev->dev, "reason: %s (%#x)\n",
panic_msg[i].msg, code & SOF_IPC_PANIC_CODE_MASK);
dev_printk(level, sdev->dev, "trace point: %#010x\n", tracep_code);
goto out;
}
}
/* unknown error */
dev_printk(level, sdev->dev, "unknown panic code: %#x\n",
code & SOF_IPC_PANIC_CODE_MASK);
dev_printk(level, sdev->dev, "trace point: %#010x\n", tracep_code);
out:
dev_printk(level, sdev->dev, "panic at %s:%d\n", panic_info->filename,
panic_info->linenum);
sof_oops(sdev, level, oops);
sof_stack(sdev, level, oops, stack, stack_words);
}
EXPORT_SYMBOL(sof_print_oops_and_stack);
/* Helper to manage DSP state */
void sof_set_fw_state(struct snd_sof_dev *sdev, enum sof_fw_state new_state)
{
if (sdev->fw_state == new_state)
return;
dev_dbg(sdev->dev, "fw_state change: %d -> %d\n", sdev->fw_state, new_state);
sdev->fw_state = new_state;
switch (new_state) {
case SOF_FW_BOOT_NOT_STARTED:
case SOF_FW_BOOT_COMPLETE:
case SOF_FW_CRASHED:
sof_client_fw_state_dispatcher(sdev);
fallthrough;
default:
break;
}
}
EXPORT_SYMBOL(sof_set_fw_state);
static struct snd_sof_of_mach *sof_of_machine_select(struct snd_sof_dev *sdev)
{
struct snd_sof_pdata *sof_pdata = sdev->pdata;
const struct sof_dev_desc *desc = sof_pdata->desc;
struct snd_sof_of_mach *mach = desc->of_machines;
if (!mach)
return NULL;
for (; mach->compatible; mach++) {
if (of_machine_is_compatible(mach->compatible)) {
sof_pdata->tplg_filename = mach->sof_tplg_filename;
if (mach->fw_filename)
sof_pdata->fw_filename = mach->fw_filename;
return mach;
}
}
return NULL;
}
/* SOF Driver enumeration */
static 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;
if (!IS_ENABLED(CONFIG_SND_SOC_SOF_FORCE_NOCODEC_MODE)) {
const struct snd_sof_of_mach *of_mach;
if (IS_ENABLED(CONFIG_SND_SOC_SOF_NOCODEC_DEBUG_SUPPORT) &&
sof_debug_check_flag(SOF_DBG_FORCE_NOCODEC))
goto nocodec;
/* find machine */
mach = snd_sof_machine_select(sdev);
if (mach) {
sof_pdata->machine = mach;
if (sof_pdata->subsystem_id_set) {
mach->mach_params.subsystem_vendor = sof_pdata->subsystem_vendor;
mach->mach_params.subsystem_device = sof_pdata->subsystem_device;
mach->mach_params.subsystem_id_set = true;
}
snd_sof_set_mach_params(mach, sdev);
return 0;
}
of_mach = sof_of_machine_select(sdev);
if (of_mach) {
sof_pdata->of_machine = of_mach;
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;
}
} else {
dev_warn(sdev->dev, "Force to use nocodec mode\n");
}
nocodec:
/* 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";
if (!sof_pdata->tplg_filename)
sof_pdata->tplg_filename = desc->nocodec_tplg_filename;
sof_pdata->machine = mach;
snd_sof_set_mach_params(mach, sdev);
return 0;
}
static int sof_select_ipc_and_paths(struct snd_sof_dev *sdev)
{
struct snd_sof_pdata *plat_data = sdev->pdata;
struct sof_loadable_file_profile *base_profile = &plat_data->ipc_file_profile_base;
struct sof_loadable_file_profile out_profile;
struct device *dev = sdev->dev;
int ret;
if (base_profile->ipc_type != plat_data->desc->ipc_default)
dev_info(dev,
"Module parameter used, overriding default IPC %d to %d\n",
plat_data->desc->ipc_default, base_profile->ipc_type);
if (base_profile->fw_path)
dev_dbg(dev, "Module parameter used, changed fw path to %s\n",
base_profile->fw_path);
else if (base_profile->fw_path_postfix)
dev_dbg(dev, "Path postfix appended to default fw path: %s\n",
base_profile->fw_path_postfix);
if (base_profile->fw_lib_path)
dev_dbg(dev, "Module parameter used, changed fw_lib path to %s\n",
base_profile->fw_lib_path);
else if (base_profile->fw_lib_path_postfix)
dev_dbg(dev, "Path postfix appended to default fw_lib path: %s\n",
base_profile->fw_lib_path_postfix);
if (base_profile->fw_name)
dev_dbg(dev, "Module parameter used, changed fw filename to %s\n",
base_profile->fw_name);
if (base_profile->tplg_path)
dev_dbg(dev, "Module parameter used, changed tplg path to %s\n",
base_profile->tplg_path);
if (base_profile->tplg_name)
dev_dbg(dev, "Module parameter used, changed tplg name to %s\n",
base_profile->tplg_name);
ret = sof_create_ipc_file_profile(sdev, base_profile, &out_profile);
if (ret)
return ret;
plat_data->ipc_type = out_profile.ipc_type;
plat_data->fw_filename = out_profile.fw_name;
plat_data->fw_filename_prefix = out_profile.fw_path;
plat_data->fw_lib_prefix = out_profile.fw_lib_path;
plat_data->tplg_filename_prefix = out_profile.tplg_path;
return 0;
}
static int validate_sof_ops(struct snd_sof_dev *sdev)
{
int ret;
/* init ops, if necessary */
ret = sof_ops_init(sdev);
if (ret < 0)
return ret;
/* check all mandatory ops */
if (!sof_ops(sdev) || !sof_ops(sdev)->probe) {
dev_err(sdev->dev, "missing mandatory ops\n");
sof_ops_free(sdev);
return -EINVAL;
}
if (!sdev->dspless_mode_selected &&
(!sof_ops(sdev)->run || !sof_ops(sdev)->block_read ||
!sof_ops(sdev)->block_write || !sof_ops(sdev)->send_msg ||
!sof_ops(sdev)->load_firmware || !sof_ops(sdev)->ipc_msg_data)) {
dev_err(sdev->dev, "missing mandatory DSP ops\n");
sof_ops_free(sdev);
return -EINVAL;
}
return 0;
}
static int sof_init_sof_ops(struct snd_sof_dev *sdev)
{
struct snd_sof_pdata *plat_data = sdev->pdata;
struct sof_loadable_file_profile *base_profile = &plat_data->ipc_file_profile_base;
/* check IPC support */
if (!(BIT(base_profile->ipc_type) & plat_data->desc->ipc_supported_mask)) {
dev_err(sdev->dev,
"ipc_type %d is not supported on this platform, mask is %#x\n",
base_profile->ipc_type, plat_data->desc->ipc_supported_mask);
return -EINVAL;
}
/*
* Save the selected IPC type and a topology name override before
* selecting ops since platform code might need this information
*/
plat_data->ipc_type = base_profile->ipc_type;
plat_data->tplg_filename = base_profile->tplg_name;
return validate_sof_ops(sdev);
}
static int sof_init_environment(struct snd_sof_dev *sdev)
{
struct snd_sof_pdata *plat_data = sdev->pdata;
struct sof_loadable_file_profile *base_profile = &plat_data->ipc_file_profile_base;
int ret;
/* probe the DSP hardware */
ret = snd_sof_probe(sdev);
if (ret < 0) {
dev_err(sdev->dev, "failed to probe DSP %d\n", ret);
goto err_sof_probe;
}
/* check machine info */
ret = sof_machine_check(sdev);
if (ret < 0) {
dev_err(sdev->dev, "failed to get machine info %d\n", ret);
goto err_machine_check;
}
ret = sof_select_ipc_and_paths(sdev);
if (ret) {
goto err_machine_check;
} else if (plat_data->ipc_type != base_profile->ipc_type) {
/* IPC type changed, re-initialize the ops */
sof_ops_free(sdev);
ret = validate_sof_ops(sdev);
if (ret < 0) {
snd_sof_remove(sdev);
snd_sof_remove_late(sdev);
return ret;
}
}
return 0;
err_machine_check:
snd_sof_remove(sdev);
err_sof_probe:
snd_sof_remove_late(sdev);
sof_ops_free(sdev);
return ret;
}
/*
* FW Boot State Transition Diagram
*
* +----------------------------------------------------------------------+
* | |
* ------------------ ------------------ |
* | | | | |
* | BOOT_FAILED |<-------| READY_FAILED | |
* | |<--+ | | ------------------ |
* ------------------ | ------------------ | | |
* ^ | ^ | CRASHED |---+ |
* | | | | | | |
* (FW Boot Timeout) | (FW_READY FAIL) ------------------ | |
* | | | ^ | |
* | | | |(DSP Panic) | |
* ------------------ | | ------------------ | |
* | | | | | | | |
* | IN_PROGRESS |---------------+------------->| COMPLETE | | |
* | | (FW Boot OK) (FW_READY OK) | | | |
* ------------------ | ------------------ | |
* ^ | | | |
* | | | | |
* (FW Loading OK) | (System Suspend/Runtime Suspend)
* | | | | |
* | (FW Loading Fail) | | |
* ------------------ | ------------------ | | |
* | | | | |<-----+ | |
* | PREPARE |---+ | NOT_STARTED |<---------------------+ |
* | | | |<--------------------------+
* ------------------ ------------------
* | ^ | ^
* | | | |
* | +-----------------------+ |
* | (DSP Probe OK) |
* | |
* | |
* +------------------------------------+
* (System Suspend/Runtime Suspend)
*/
static int sof_probe_continue(struct snd_sof_dev *sdev)
{
struct snd_sof_pdata *plat_data = sdev->pdata;
int ret;
/* Initialize loadable file paths and check the environment validity */
ret = sof_init_environment(sdev);
if (ret)
return ret;
sof_set_fw_state(sdev, SOF_FW_BOOT_PREPARE);
/* set up platform component driver */
snd_sof_new_platform_drv(sdev);
if (sdev->dspless_mode_selected) {
sof_set_fw_state(sdev, SOF_DSPLESS_MODE);
goto skip_dsp_init;
}
/* register any debug/trace capabilities */
ret = snd_sof_dbg_init(sdev);
if (ret < 0) {
/*
* debugfs issues are suppressed in snd_sof_dbg_init() since
* we cannot rely on debugfs
* here we trap errors due to memory allocation only.
*/
dev_err(sdev->dev, "error: failed to init DSP trace/debug %d\n",
ret);
goto dbg_err;
}
/* init the IPC */
sdev->ipc = snd_sof_ipc_init(sdev);
if (!sdev->ipc) {
ret = -ENOMEM;
dev_err(sdev->dev, "error: failed to init DSP IPC %d\n", ret);
goto ipc_err;
}
/* load the firmware */
ret = snd_sof_load_firmware(sdev);
if (ret < 0) {
dev_err(sdev->dev, "error: failed to load DSP firmware %d\n",
ret);
sof_set_fw_state(sdev, SOF_FW_BOOT_FAILED);
goto fw_load_err;
}
sof_set_fw_state(sdev, SOF_FW_BOOT_IN_PROGRESS);
/*
* Boot the firmware. The FW boot status will be modified
* in snd_sof_run_firmware() depending on the outcome.
*/
ret = snd_sof_run_firmware(sdev);
if (ret < 0) {
dev_err(sdev->dev, "error: failed to boot DSP firmware %d\n",
ret);
sof_set_fw_state(sdev, SOF_FW_BOOT_FAILED);
goto fw_run_err;
}
if (sof_debug_check_flag(SOF_DBG_ENABLE_TRACE)) {
sdev->fw_trace_is_supported = true;
/* init firmware tracing */
ret = sof_fw_trace_init(sdev);
if (ret < 0) {
/* non fatal */
dev_warn(sdev->dev, "failed to initialize firmware tracing %d\n",
ret);
}
} else {
dev_dbg(sdev->dev, "SOF firmware trace disabled\n");
}
skip_dsp_init:
/* hereafter all FW boot flows are for PM reasons */
sdev->first_boot = false;
/* now register audio DSP platform driver and dai */
ret = devm_snd_soc_register_component(sdev->dev, &sdev->plat_drv,
sof_ops(sdev)->drv,
sof_ops(sdev)->num_drv);
if (ret < 0) {
dev_err(sdev->dev,
"error: failed to register DSP DAI driver %d\n", ret);
goto fw_trace_err;
}
ret = snd_sof_machine_register(sdev, plat_data);
if (ret < 0) {
dev_err(sdev->dev,
"error: failed to register machine driver %d\n", ret);
goto fw_trace_err;
}
ret = sof_register_clients(sdev);
if (ret < 0) {
dev_err(sdev->dev, "failed to register clients %d\n", ret);
goto sof_machine_err;
}
/*
* Some platforms in SOF, ex: BYT, may not have their platform PM
* callbacks set. Increment the usage count so as to
* prevent the device from entering runtime suspend.
*/
if (!sof_ops(sdev)->runtime_suspend || !sof_ops(sdev)->runtime_resume)
pm_runtime_get_noresume(sdev->dev);
if (plat_data->sof_probe_complete)
plat_data->sof_probe_complete(sdev->dev);
sdev->probe_completed = true;
return 0;
sof_machine_err:
snd_sof_machine_unregister(sdev, plat_data);
fw_trace_err:
sof_fw_trace_free(sdev);
fw_run_err:
snd_sof_fw_unload(sdev);
fw_load_err:
snd_sof_ipc_free(sdev);
ipc_err:
dbg_err:
snd_sof_free_debug(sdev);
snd_sof_remove(sdev);
snd_sof_remove_late(sdev);
sof_ops_free(sdev);
/* all resources freed, update state to match */
sof_set_fw_state(sdev, SOF_FW_BOOT_NOT_STARTED);
sdev->first_boot = true;
return ret;
}
static void sof_probe_work(struct work_struct *work)
{
struct snd_sof_dev *sdev =
container_of(work, struct snd_sof_dev, probe_work);
int ret;
ret = sof_probe_continue(sdev);
if (ret < 0) {
/* errors cannot be propagated, log */
dev_err(sdev->dev, "error: %s failed err: %d\n", __func__, ret);
}
}
int snd_sof_device_probe(struct device *dev, struct snd_sof_pdata *plat_data)
{
struct snd_sof_dev *sdev;
int ret;
sdev = devm_kzalloc(dev, sizeof(*sdev), GFP_KERNEL);
if (!sdev)
return -ENOMEM;
/* initialize sof device */
sdev->dev = dev;
/* initialize default DSP power state */
sdev->dsp_power_state.state = SOF_DSP_PM_D0;
sdev->pdata = plat_data;
sdev->first_boot = true;
dev_set_drvdata(dev, sdev);
if (sof_core_debug)
dev_info(dev, "sof_debug value: %#x\n", sof_core_debug);
if (sof_debug_check_flag(SOF_DBG_DSPLESS_MODE)) {
if (plat_data->desc->dspless_mode_supported) {
dev_info(dev, "Switching to DSPless mode\n");
sdev->dspless_mode_selected = true;
} else {
dev_info(dev, "DSPless mode is not supported by the platform\n");
}
}
/* Initialize sof_ops based on the initial selected IPC version */
ret = sof_init_sof_ops(sdev);
if (ret)
return ret;
INIT_LIST_HEAD(&sdev->pcm_list);
INIT_LIST_HEAD(&sdev->kcontrol_list);
INIT_LIST_HEAD(&sdev->widget_list);
INIT_LIST_HEAD(&sdev->pipeline_list);
INIT_LIST_HEAD(&sdev->dai_list);
INIT_LIST_HEAD(&sdev->dai_link_list);
INIT_LIST_HEAD(&sdev->route_list);
INIT_LIST_HEAD(&sdev->ipc_client_list);
INIT_LIST_HEAD(&sdev->ipc_rx_handler_list);
INIT_LIST_HEAD(&sdev->fw_state_handler_list);
spin_lock_init(&sdev->ipc_lock);
spin_lock_init(&sdev->hw_lock);
mutex_init(&sdev->power_state_access);
mutex_init(&sdev->ipc_client_mutex);
mutex_init(&sdev->client_event_handler_mutex);
/* set default timeouts if none provided */
if (plat_data->desc->ipc_timeout == 0)
sdev->ipc_timeout = TIMEOUT_DEFAULT_IPC_MS;
else
sdev->ipc_timeout = plat_data->desc->ipc_timeout;
if (plat_data->desc->boot_timeout == 0)
sdev->boot_timeout = TIMEOUT_DEFAULT_BOOT_MS;
else
sdev->boot_timeout = plat_data->desc->boot_timeout;
sof_set_fw_state(sdev, SOF_FW_BOOT_NOT_STARTED);
/*
* first pass of probe which isn't allowed to run in a work-queue,
* typically to rely on -EPROBE_DEFER dependencies
*/
ret = snd_sof_probe_early(sdev);
if (ret < 0)
return ret;
if (IS_ENABLED(CONFIG_SND_SOC_SOF_PROBE_WORK_QUEUE)) {
INIT_WORK(&sdev->probe_work, sof_probe_work);
schedule_work(&sdev->probe_work);
return 0;
}
return sof_probe_continue(sdev);
}
EXPORT_SYMBOL(snd_sof_device_probe);
bool snd_sof_device_probe_completed(struct device *dev)
{
struct snd_sof_dev *sdev = dev_get_drvdata(dev);
return sdev->probe_completed;
}
EXPORT_SYMBOL(snd_sof_device_probe_completed);
int snd_sof_device_remove(struct device *dev)
{
struct snd_sof_dev *sdev = dev_get_drvdata(dev);
struct snd_sof_pdata *pdata = sdev->pdata;
int ret;
bool aborted = false;
if (IS_ENABLED(CONFIG_SND_SOC_SOF_PROBE_WORK_QUEUE))
aborted = cancel_work_sync(&sdev->probe_work);
/*
* Unregister any registered client device first before IPC and debugfs
* to allow client drivers to be removed cleanly
*/
sof_unregister_clients(sdev);
/*
* Unregister machine driver. This will unbind the snd_card which
* will remove the component driver and unload the topology
* before freeing the snd_card.
*/
snd_sof_machine_unregister(sdev, pdata);
/*
* Balance the runtime pm usage count in case we are faced with an
* exception and we forcably prevented D3 power state to preserve
* context
*/
if (sdev->d3_prevented) {
sdev->d3_prevented = false;
pm_runtime_put_noidle(sdev->dev);
}
if (sdev->fw_state > SOF_FW_BOOT_NOT_STARTED) {
sof_fw_trace_free(sdev);
ret = snd_sof_dsp_power_down_notify(sdev);
if (ret < 0)
dev_warn(dev, "error: %d failed to prepare DSP for device removal",
ret);
snd_sof_ipc_free(sdev);
snd_sof_free_debug(sdev);
snd_sof_remove(sdev);
snd_sof_remove_late(sdev);
sof_ops_free(sdev);
} else if (aborted) {
/* probe_work never ran */
snd_sof_remove_late(sdev);
sof_ops_free(sdev);
}
/* release firmware */
snd_sof_fw_unload(sdev);
return 0;
}
EXPORT_SYMBOL(snd_sof_device_remove);
int snd_sof_device_shutdown(struct device *dev)
{
struct snd_sof_dev *sdev = dev_get_drvdata(dev);
if (IS_ENABLED(CONFIG_SND_SOC_SOF_PROBE_WORK_QUEUE))
cancel_work_sync(&sdev->probe_work);
if (sdev->fw_state == SOF_FW_BOOT_COMPLETE) {
sof_fw_trace_free(sdev);
return snd_sof_shutdown(sdev);
}
return 0;
}
EXPORT_SYMBOL(snd_sof_device_shutdown);
/* Machine driver registering and unregistering */
int sof_machine_register(struct snd_sof_dev *sdev, void *pdata)
{
struct snd_sof_pdata *plat_data = pdata;
const char *drv_name;
const void *mach;
int size;
drv_name = plat_data->machine->drv_name;
mach = 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 = pdata;
platform_device_unregister(plat_data->pdev_mach);
}
EXPORT_SYMBOL(sof_machine_unregister);
MODULE_AUTHOR("Liam Girdwood");
MODULE_LICENSE("Dual BSD/GPL");
MODULE_DESCRIPTION("Sound Open Firmware (SOF) Core");
MODULE_ALIAS("platform:sof-audio");
MODULE_IMPORT_NS(SND_SOC_SOF_CLIENT);
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