// 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 <[email protected]>
//
#include "ops.h"
#include "sof-priv.h"
#include "sof-audio.h"
/*
* Helper function to determine the target DSP state during
* system suspend. This function only cares about the device
* D-states. Platform-specific substates, if any, should be
* handled by the platform-specific parts.
*/
static u32 snd_sof_dsp_power_target(struct snd_sof_dev *sdev)
{
u32 target_dsp_state;
switch (sdev->system_suspend_target) {
case SOF_SUSPEND_S5:
case SOF_SUSPEND_S4:
/* DSP should be in D3 if the system is suspending to S3+ */
case SOF_SUSPEND_S3:
/* DSP should be in D3 if the system is suspending to S3 */
target_dsp_state = SOF_DSP_PM_D3;
break;
case SOF_SUSPEND_S0IX:
/*
* Currently, the only criterion for retaining the DSP in D0
* is that there are streams that ignored the suspend trigger.
* Additional criteria such Soundwire clock-stop mode and
* device suspend latency considerations will be added later.
*/
if (snd_sof_stream_suspend_ignored(sdev))
target_dsp_state = SOF_DSP_PM_D0;
else
target_dsp_state = SOF_DSP_PM_D3;
break;
default:
/* This case would be during runtime suspend */
target_dsp_state = SOF_DSP_PM_D3;
break;
}
return target_dsp_state;
}
#if IS_ENABLED(CONFIG_SND_SOC_SOF_DEBUG_ENABLE_DEBUGFS_CACHE)
static void sof_cache_debugfs(struct snd_sof_dev *sdev)
{
struct snd_sof_dfsentry *dfse;
list_for_each_entry(dfse, &sdev->dfsentry_list, list) {
/* nothing to do if debugfs buffer is not IO mem */
if (dfse->type == SOF_DFSENTRY_TYPE_BUF)
continue;
/* cache memory that is only accessible in D0 */
if (dfse->access_type == SOF_DEBUGFS_ACCESS_D0_ONLY)
memcpy_fromio(dfse->cache_buf, dfse->io_mem,
dfse->size);
}
}
#endif
static int sof_resume(struct device *dev, bool runtime_resume)
{
struct snd_sof_dev *sdev = dev_get_drvdata(dev);
const struct sof_ipc_pm_ops *pm_ops = sof_ipc_get_ops(sdev, pm);
const struct sof_ipc_tplg_ops *tplg_ops = sof_ipc_get_ops(sdev, tplg);
u32 old_state = sdev->dsp_power_state.state;
int ret;
/* do nothing if dsp resume callbacks are not set */
if (!runtime_resume && !sof_ops(sdev)->resume)
return 0;
if (runtime_resume && !sof_ops(sdev)->runtime_resume)
return 0;
/* DSP was never successfully started, nothing to resume */
if (sdev->first_boot)
return 0;
/*
* if the runtime_resume flag is set, call the runtime_resume routine
* or else call the system resume routine
*/
if (runtime_resume)
ret = snd_sof_dsp_runtime_resume(sdev);
else
ret = snd_sof_dsp_resume(sdev);
if (ret < 0) {
dev_err(sdev->dev,
"error: failed to power up DSP after resume\n");
return ret;
}
if (sdev->dspless_mode_selected) {
sof_set_fw_state(sdev, SOF_DSPLESS_MODE);
return 0;
}
/*
* Nothing further to be done for platforms that support the low power
* D0 substate. Resume trace and return when resuming from
* low-power D0 substate
*/
if (!runtime_resume && sof_ops(sdev)->set_power_state &&
old_state == SOF_DSP_PM_D0) {
ret = sof_fw_trace_resume(sdev);
if (ret < 0)
/* non fatal */
dev_warn(sdev->dev,
"failed to enable trace after resume %d\n", ret);
return 0;
}
sof_set_fw_state(sdev, SOF_FW_BOOT_PREPARE);
/* load the firmware */
ret = snd_sof_load_firmware(sdev);
if (ret < 0) {
dev_err(sdev->dev,
"error: failed to load DSP firmware after resume %d\n",
ret);
sof_set_fw_state(sdev, SOF_FW_BOOT_FAILED);
return ret;
}
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 after resume %d\n",
ret);
sof_set_fw_state(sdev, SOF_FW_BOOT_FAILED);
return ret;
}
/* resume DMA trace */
ret = sof_fw_trace_resume(sdev);
if (ret < 0) {
/* non fatal */
dev_warn(sdev->dev,
"warning: failed to init trace after resume %d\n",
ret);
}
/* restore pipelines */
if (tplg_ops && tplg_ops->set_up_all_pipelines) {
ret = tplg_ops->set_up_all_pipelines(sdev, false);
if (ret < 0) {
dev_err(sdev->dev, "Failed to restore pipeline after resume %d\n", ret);
goto setup_fail;
}
}
/* Notify clients not managed by pm framework about core resume */
sof_resume_clients(sdev);
/* notify DSP of system resume */
if (pm_ops && pm_ops->ctx_restore) {
ret = pm_ops->ctx_restore(sdev);
if (ret < 0)
dev_err(sdev->dev, "ctx_restore IPC error during resume: %d\n", ret);
}
setup_fail:
#if IS_ENABLED(CONFIG_SND_SOC_SOF_DEBUG_ENABLE_DEBUGFS_CACHE)
if (ret < 0) {
/*
* Debugfs cannot be read in runtime suspend, so cache
* the contents upon failure. This allows to capture
* possible DSP coredump information.
*/
sof_cache_debugfs(sdev);
}
#endif
return ret;
}
static int sof_suspend(struct device *dev, bool runtime_suspend)
{
struct snd_sof_dev *sdev = dev_get_drvdata(dev);
const struct sof_ipc_pm_ops *pm_ops = sof_ipc_get_ops(sdev, pm);
const struct sof_ipc_tplg_ops *tplg_ops = sof_ipc_get_ops(sdev, tplg);
pm_message_t pm_state;
u32 target_state = snd_sof_dsp_power_target(sdev);
u32 old_state = sdev->dsp_power_state.state;
int ret;
/* do nothing if dsp suspend callback is not set */
if (!runtime_suspend && !sof_ops(sdev)->suspend)
return 0;
if (runtime_suspend && !sof_ops(sdev)->runtime_suspend)
return 0;
/* we need to tear down pipelines only if the DSP hardware is
* active, which happens for PCI devices. if the device is
* suspended, it is brought back to full power and then
* suspended again
*/
if (tplg_ops && tplg_ops->tear_down_all_pipelines && (old_state == SOF_DSP_PM_D0))
tplg_ops->tear_down_all_pipelines(sdev, false);
if (sdev->fw_state != SOF_FW_BOOT_COMPLETE)
goto suspend;
/* prepare for streams to be resumed properly upon resume */
if (!runtime_suspend) {
ret = snd_sof_dsp_hw_params_upon_resume(sdev);
if (ret < 0) {
dev_err(sdev->dev,
"error: setting hw_params flag during suspend %d\n",
ret);
return ret;
}
}
pm_state.event = target_state;
/* suspend DMA trace */
sof_fw_trace_suspend(sdev, pm_state);
/* Notify clients not managed by pm framework about core suspend */
sof_suspend_clients(sdev, pm_state);
/* Skip to platform-specific suspend if DSP is entering D0 */
if (target_state == SOF_DSP_PM_D0)
goto suspend;
#if IS_ENABLED(CONFIG_SND_SOC_SOF_DEBUG_ENABLE_DEBUGFS_CACHE)
/* cache debugfs contents during runtime suspend */
if (runtime_suspend)
sof_cache_debugfs(sdev);
#endif
/* notify DSP of upcoming power down */
if (pm_ops && pm_ops->ctx_save) {
ret = pm_ops->ctx_save(sdev);
if (ret == -EBUSY || ret == -EAGAIN) {
/*
* runtime PM has logic to handle -EBUSY/-EAGAIN so
* pass these errors up
*/
dev_err(sdev->dev, "ctx_save IPC error during suspend: %d\n", ret);
return ret;
} else if (ret < 0) {
/* FW in unexpected state, continue to power down */
dev_warn(sdev->dev, "ctx_save IPC error: %d, proceeding with suspend\n",
ret);
}
}
suspend:
/* return if the DSP was not probed successfully */
if (sdev->fw_state == SOF_FW_BOOT_NOT_STARTED)
return 0;
/* platform-specific suspend */
if (runtime_suspend)
ret = snd_sof_dsp_runtime_suspend(sdev);
else
ret = snd_sof_dsp_suspend(sdev, target_state);
if (ret < 0)
dev_err(sdev->dev,
"error: failed to power down DSP during suspend %d\n",
ret);
/* Do not reset FW state if DSP is in D0 */
if (target_state == SOF_DSP_PM_D0)
return ret;
/* reset FW state */
sof_set_fw_state(sdev, SOF_FW_BOOT_NOT_STARTED);
sdev->enabled_cores_mask = 0;
return ret;
}
int snd_sof_dsp_power_down_notify(struct snd_sof_dev *sdev)
{
const struct sof_ipc_pm_ops *pm_ops = sof_ipc_get_ops(sdev, pm);
/* Notify DSP of upcoming power down */
if (sof_ops(sdev)->remove && pm_ops && pm_ops->ctx_save)
return pm_ops->ctx_save(sdev);
return 0;
}
int snd_sof_runtime_suspend(struct device *dev)
{
return sof_suspend(dev, true);
}
EXPORT_SYMBOL(snd_sof_runtime_suspend);
int snd_sof_runtime_idle(struct device *dev)
{
struct snd_sof_dev *sdev = dev_get_drvdata(dev);
return snd_sof_dsp_runtime_idle(sdev);
}
EXPORT_SYMBOL(snd_sof_runtime_idle);
int snd_sof_runtime_resume(struct device *dev)
{
return sof_resume(dev, true);
}
EXPORT_SYMBOL(snd_sof_runtime_resume);
int snd_sof_resume(struct device *dev)
{
return sof_resume(dev, false);
}
EXPORT_SYMBOL(snd_sof_resume);
int snd_sof_suspend(struct device *dev)
{
return sof_suspend(dev, false);
}
EXPORT_SYMBOL(snd_sof_suspend);
int snd_sof_prepare(struct device *dev)
{
struct snd_sof_dev *sdev = dev_get_drvdata(dev);
const struct sof_dev_desc *desc = sdev->pdata->desc;
/* will suspend to S3 by default */
sdev->system_suspend_target = SOF_SUSPEND_S3;
/*
* if the firmware is crashed or boot failed then we try to aim for S3
* to reboot the firmware
*/
if (sdev->fw_state == SOF_FW_CRASHED ||
sdev->fw_state == SOF_FW_BOOT_FAILED)
return 0;
if (!desc->use_acpi_target_states)
return 0;
#if defined(CONFIG_ACPI)
switch (acpi_target_system_state()) {
case ACPI_STATE_S0:
sdev->system_suspend_target = SOF_SUSPEND_S0IX;
break;
case ACPI_STATE_S1:
case ACPI_STATE_S2:
case ACPI_STATE_S3:
sdev->system_suspend_target = SOF_SUSPEND_S3;
break;
case ACPI_STATE_S4:
sdev->system_suspend_target = SOF_SUSPEND_S4;
break;
case ACPI_STATE_S5:
sdev->system_suspend_target = SOF_SUSPEND_S5;
break;
default:
break;
}
#endif
return 0;
}
EXPORT_SYMBOL(snd_sof_prepare);
void snd_sof_complete(struct device *dev)
{
struct snd_sof_dev *sdev = dev_get_drvdata(dev);
sdev->system_suspend_target = SOF_SUSPEND_NONE;
}
EXPORT_SYMBOL(snd_sof_complete);
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