[linux-2.6-block.git] / sound / soc / sof / pm.c

// 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>
//

#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 = sdev->ipc->ops->pm;
	const struct sof_ipc_tplg_ops *tplg_ops = sdev->ipc->ops->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;
	}

	/*
	 * 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->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);
			return ret;
		}
	}

	/* 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);
	}

	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 = sdev->ipc->ops->pm;
	const struct sof_ipc_tplg_ops *tplg_ops = sdev->ipc->ops->tplg;
	pm_message_t pm_state;
	u32 target_state = 0;
	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;

	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;
		}
	}

	target_state = snd_sof_dsp_power_target(sdev);
	pm_state.event = target_state;

	/* Skip to platform-specific suspend if DSP is entering D0 */
	if (target_state == SOF_DSP_PM_D0) {
		sof_fw_trace_suspend(sdev, pm_state);
		/* Notify clients not managed by pm framework about core suspend */
		sof_suspend_clients(sdev, pm_state);
		goto suspend;
	}

	if (tplg_ops->tear_down_all_pipelines)
		tplg_ops->tear_down_all_pipelines(sdev, false);

	/* 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);

#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 = sdev->ipc->ops->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);
Commit	Line	Data
e149ca29	1	// SPDX-License-Identifier: (GPL-2.0-only OR BSD-3-Clause)
8920153c LG	2	//
	3	// This file is provided under a dual BSD/GPLv2 license. When using or
	4	// redistributing this file, you may do so under either license.
	5	//
	6	// Copyright(c) 2018 Intel Corporation. All rights reserved.
	7	//
	8	// Author: Liam Girdwood <liam.r.girdwood@linux.intel.com>
	9	//
	10
	11	#include "ops.h"
	12	#include "sof-priv.h"
ee1e79b7	13	#include "sof-audio.h"
8920153c	14
700d1677 RS	15	/*
	16	* Helper function to determine the target DSP state during
	17	* system suspend. This function only cares about the device
	18	* D-states. Platform-specific substates, if any, should be
	19	* handled by the platform-specific parts.
	20	*/
	21	static u32 snd_sof_dsp_power_target(struct snd_sof_dev *sdev)
	22	{
	23	u32 target_dsp_state;
	24
	25	switch (sdev->system_suspend_target) {
9d2d4627 PLB	26	case SOF_SUSPEND_S5:
	27	case SOF_SUSPEND_S4:
	28	/* DSP should be in D3 if the system is suspending to S3+ */
700d1677 RS	29	case SOF_SUSPEND_S3:
	30	/* DSP should be in D3 if the system is suspending to S3 */
	31	target_dsp_state = SOF_DSP_PM_D3;
	32	break;
	33	case SOF_SUSPEND_S0IX:
	34	/*
	35	* Currently, the only criterion for retaining the DSP in D0
	36	* is that there are streams that ignored the suspend trigger.
	37	* Additional criteria such Soundwire clock-stop mode and
	38	* device suspend latency considerations will be added later.
	39	*/
	40	if (snd_sof_stream_suspend_ignored(sdev))
	41	target_dsp_state = SOF_DSP_PM_D0;
	42	else
	43	target_dsp_state = SOF_DSP_PM_D3;
	44	break;
	45	default:
	46	/* This case would be during runtime suspend */
	47	target_dsp_state = SOF_DSP_PM_D3;
	48	break;
	49	}
	50
	51	return target_dsp_state;
	52	}
	53
8920153c LG	54	#if IS_ENABLED(CONFIG_SND_SOC_SOF_DEBUG_ENABLE_DEBUGFS_CACHE)
	55	static void sof_cache_debugfs(struct snd_sof_dev *sdev)
	56	{
	57	struct snd_sof_dfsentry *dfse;
	58
	59	list_for_each_entry(dfse, &sdev->dfsentry_list, list) {
	60
	61	/* nothing to do if debugfs buffer is not IO mem */
	62	if (dfse->type == SOF_DFSENTRY_TYPE_BUF)
	63	continue;
	64
	65	/* cache memory that is only accessible in D0 */
	66	if (dfse->access_type == SOF_DEBUGFS_ACCESS_D0_ONLY)
	67	memcpy_fromio(dfse->cache_buf, dfse->io_mem,
	68	dfse->size);
	69	}
	70	}
	71	#endif
	72
	73	static int sof_resume(struct device *dev, bool runtime_resume)
	74	{
	75	struct snd_sof_dev *sdev = dev_get_drvdata(dev);
657774ac	76	const struct sof_ipc_pm_ops *pm_ops = sdev->ipc->ops->pm;
31cd6e46	77	const struct sof_ipc_tplg_ops *tplg_ops = sdev->ipc->ops->tplg;
61e285ca	78	u32 old_state = sdev->dsp_power_state.state;
8920153c LG	79	int ret;
	80
	81	/* do nothing if dsp resume callbacks are not set */
c26fde3b DB	82	if (!runtime_resume && !sof_ops(sdev)->resume)
	83	return 0;
	84
	85	if (runtime_resume && !sof_ops(sdev)->runtime_resume)
8920153c LG	86	return 0;
8920153c LG	87
410e5e55 PLB	88	/* DSP was never successfully started, nothing to resume */
	89	if (sdev->first_boot)
	90	return 0;
	91
8920153c LG	92	/*
	93	* if the runtime_resume flag is set, call the runtime_resume routine
	94	* or else call the system resume routine
	95	*/
	96	if (runtime_resume)
	97	ret = snd_sof_dsp_runtime_resume(sdev);
	98	else
	99	ret = snd_sof_dsp_resume(sdev);
	100	if (ret < 0) {
	101	dev_err(sdev->dev,
	102	"error: failed to power up DSP after resume\n");
	103	return ret;
	104	}
	105
fc907cc5 RS	106	/*
fc907cc5 RS	107	* Nothing further to be done for platforms that support the low power
249ee180 LY	108	* D0 substate. Resume trace and return when resuming from
249ee180 LY	109	* low-power D0 substate
fc907cc5 RS	110	*/
fc907cc5 RS	111	if (!runtime_resume && sof_ops(sdev)->set_power_state &&
249ee180	112	old_state == SOF_DSP_PM_D0) {
1dedbe4f	113	ret = sof_fw_trace_resume(sdev);
249ee180 LY	114	if (ret < 0)
	115	/* non fatal */
	116	dev_warn(sdev->dev,
	117	"failed to enable trace after resume %d\n", ret);
fb9a8119	118	return 0;
249ee180	119	}
fb9a8119	120
58a5c9a4	121	sof_set_fw_state(sdev, SOF_FW_BOOT_PREPARE);
6ca5cecb	122
8920153c LG	123	/* load the firmware */
	124	ret = snd_sof_load_firmware(sdev);
	125	if (ret < 0) {
	126	dev_err(sdev->dev,
	127	"error: failed to load DSP firmware after resume %d\n",
	128	ret);
e2406275	129	sof_set_fw_state(sdev, SOF_FW_BOOT_FAILED);
8920153c LG	130	return ret;
	131	}
	132
58a5c9a4	133	sof_set_fw_state(sdev, SOF_FW_BOOT_IN_PROGRESS);
6ca5cecb RS	134
	135	/*
	136	* Boot the firmware. The FW boot status will be modified
	137	* in snd_sof_run_firmware() depending on the outcome.
	138	*/
8920153c LG	139	ret = snd_sof_run_firmware(sdev);
	140	if (ret < 0) {
	141	dev_err(sdev->dev,
	142	"error: failed to boot DSP firmware after resume %d\n",
	143	ret);
e2406275	144	sof_set_fw_state(sdev, SOF_FW_BOOT_FAILED);
8920153c LG	145	return ret;
	146	}
	147
758f24d4	148	/* resume DMA trace */
1dedbe4f	149	ret = sof_fw_trace_resume(sdev);
8920153c LG	150	if (ret < 0) {
	151	/* non fatal */
	152	dev_warn(sdev->dev,
	153	"warning: failed to init trace after resume %d\n",
	154	ret);
	155	}
	156
	157	/* restore pipelines */
31cd6e46 RS	158	if (tplg_ops->set_up_all_pipelines) {
	159	ret = tplg_ops->set_up_all_pipelines(sdev, false);
	160	if (ret < 0) {
	161	dev_err(sdev->dev, "Failed to restore pipeline after resume %d\n", ret);
	162	return ret;
	163	}
8920153c LG	164	}
8920153c LG	165
1069967a PU	166	/* Notify clients not managed by pm framework about core resume */
	167	sof_resume_clients(sdev);
	168
8920153c	169	/* notify DSP of system resume */
657774ac RS	170	if (pm_ops && pm_ops->ctx_restore) {
	171	ret = pm_ops->ctx_restore(sdev);
	172	if (ret < 0)
	173	dev_err(sdev->dev, "ctx_restore IPC error during resume: %d\n", ret);
	174	}
8920153c LG	175
	176	return ret;
	177	}
	178
	179	static int sof_suspend(struct device *dev, bool runtime_suspend)
	180	{
	181	struct snd_sof_dev *sdev = dev_get_drvdata(dev);
657774ac	182	const struct sof_ipc_pm_ops *pm_ops = sdev->ipc->ops->pm;
31cd6e46	183	const struct sof_ipc_tplg_ops *tplg_ops = sdev->ipc->ops->tplg;
1069967a	184	pm_message_t pm_state;
61e285ca	185	u32 target_state = 0;
8920153c LG	186	int ret;
	187
	188	/* do nothing if dsp suspend callback is not set */
c26fde3b DB	189	if (!runtime_suspend && !sof_ops(sdev)->suspend)
	190	return 0;
	191
	192	if (runtime_suspend && !sof_ops(sdev)->runtime_suspend)
8920153c LG	193	return 0;
8920153c LG	194
6ca5cecb	195	if (sdev->fw_state != SOF_FW_BOOT_COMPLETE)
fb9a8119	196	goto suspend;
8920153c	197
a1ce6e43	198	/* prepare for streams to be resumed properly upon resume */
7077a07a	199	if (!runtime_suspend) {
8e84b6a4	200	ret = snd_sof_dsp_hw_params_upon_resume(sdev);
7077a07a RS	201	if (ret < 0) {
	202	dev_err(sdev->dev,
	203	"error: setting hw_params flag during suspend %d\n",
	204	ret);
	205	return ret;
	206	}
	207	}
8920153c	208
61e285ca	209	target_state = snd_sof_dsp_power_target(sdev);
1069967a	210	pm_state.event = target_state;
fb9a8119	211
61e285ca	212	/* Skip to platform-specific suspend if DSP is entering D0 */
1069967a	213	if (target_state == SOF_DSP_PM_D0) {
1dedbe4f	214	sof_fw_trace_suspend(sdev, pm_state);
1069967a PU	215	/* Notify clients not managed by pm framework about core suspend */
1069967a PU	216	sof_suspend_clients(sdev, pm_state);
fb9a8119	217	goto suspend;
1069967a	218	}
fb9a8119	219
31cd6e46 RS	220	if (tplg_ops->tear_down_all_pipelines)
31cd6e46 RS	221	tplg_ops->tear_down_all_pipelines(sdev, false);
0a2dea1f	222
758f24d4	223	/* suspend DMA trace */
1dedbe4f	224	sof_fw_trace_suspend(sdev, pm_state);
fb9a8119	225
1069967a PU	226	/* Notify clients not managed by pm framework about core suspend */
	227	sof_suspend_clients(sdev, pm_state);
	228
8920153c LG	229	#if IS_ENABLED(CONFIG_SND_SOC_SOF_DEBUG_ENABLE_DEBUGFS_CACHE)
	230	/* cache debugfs contents during runtime suspend */
	231	if (runtime_suspend)
	232	sof_cache_debugfs(sdev);
	233	#endif
	234	/* notify DSP of upcoming power down */
657774ac RS	235	if (pm_ops && pm_ops->ctx_save) {
	236	ret = pm_ops->ctx_save(sdev);
	237	if (ret == -EBUSY \|\| ret == -EAGAIN) {
	238	/*
	239	* runtime PM has logic to handle -EBUSY/-EAGAIN so
	240	* pass these errors up
	241	*/
	242	dev_err(sdev->dev, "ctx_save IPC error during suspend: %d\n", ret);
	243	return ret;
	244	} else if (ret < 0) {
	245	/* FW in unexpected state, continue to power down */
	246	dev_warn(sdev->dev, "ctx_save IPC error: %d, proceeding with suspend\n",
	247	ret);
	248	}
8920153c LG	249	}
8920153c LG	250
fb9a8119	251	suspend:
6ca5cecb RS	252
	253	/* return if the DSP was not probed successfully */
	254	if (sdev->fw_state == SOF_FW_BOOT_NOT_STARTED)
	255	return 0;
	256
fb9a8119	257	/* platform-specific suspend */
8920153c	258	if (runtime_suspend)
1c38c922	259	ret = snd_sof_dsp_runtime_suspend(sdev);
8920153c	260	else
61e285ca	261	ret = snd_sof_dsp_suspend(sdev, target_state);
8920153c LG	262	if (ret < 0)
	263	dev_err(sdev->dev,
	264	"error: failed to power down DSP during suspend %d\n",
	265	ret);
	266
61e285ca RS	267	/* Do not reset FW state if DSP is in D0 */
61e285ca RS	268	if (target_state == SOF_DSP_PM_D0)
fb9a8119 RS	269	return ret;
fb9a8119 RS	270
6ca5cecb	271	/* reset FW state */
58a5c9a4	272	sof_set_fw_state(sdev, SOF_FW_BOOT_NOT_STARTED);
b640e8a4	273	sdev->enabled_cores_mask = 0;
6ca5cecb	274
8920153c LG	275	return ret;
	276	}
	277
3541aef1 MR	278	int snd_sof_dsp_power_down_notify(struct snd_sof_dev *sdev)
3541aef1 MR	279	{
657774ac RS	280	const struct sof_ipc_pm_ops *pm_ops = sdev->ipc->ops->pm;
657774ac RS	281
3541aef1	282	/* Notify DSP of upcoming power down */
657774ac RS	283	if (sof_ops(sdev)->remove && pm_ops && pm_ops->ctx_save)
657774ac RS	284	return pm_ops->ctx_save(sdev);
3541aef1 MR	285
	286	return 0;
	287	}
	288
8920153c LG	289	int snd_sof_runtime_suspend(struct device *dev)
	290	{
	291	return sof_suspend(dev, true);
	292	}
	293	EXPORT_SYMBOL(snd_sof_runtime_suspend);
	294
62fde977 KV	295	int snd_sof_runtime_idle(struct device *dev)
	296	{
	297	struct snd_sof_dev *sdev = dev_get_drvdata(dev);
	298
	299	return snd_sof_dsp_runtime_idle(sdev);
	300	}
	301	EXPORT_SYMBOL(snd_sof_runtime_idle);
	302
8920153c LG	303	int snd_sof_runtime_resume(struct device *dev)
	304	{
	305	return sof_resume(dev, true);
	306	}
	307	EXPORT_SYMBOL(snd_sof_runtime_resume);
	308
	309	int snd_sof_resume(struct device *dev)
	310	{
	311	return sof_resume(dev, false);
	312	}
	313	EXPORT_SYMBOL(snd_sof_resume);
	314
	315	int snd_sof_suspend(struct device *dev)
	316	{
	317	return sof_suspend(dev, false);
	318	}
	319	EXPORT_SYMBOL(snd_sof_suspend);
0b50b3b1 KJ	320
	321	int snd_sof_prepare(struct device *dev)
	322	{
	323	struct snd_sof_dev *sdev = dev_get_drvdata(dev);
43437d04 DB	324	const struct sof_dev_desc *desc = sdev->pdata->desc;
	325
	326	/* will suspend to S3 by default */
	327	sdev->system_suspend_target = SOF_SUSPEND_S3;
	328
4e1f8648	329	/*
b54b3a4e PU	330	* if the firmware is crashed or boot failed then we try to aim for S3
b54b3a4e PU	331	* to reboot the firmware
4e1f8648	332	*/
b54b3a4e PU	333	if (sdev->fw_state == SOF_FW_CRASHED \|\|
b54b3a4e PU	334	sdev->fw_state == SOF_FW_BOOT_FAILED)
4e1f8648 PU	335	return 0;
4e1f8648 PU	336
43437d04 DB	337	if (!desc->use_acpi_target_states)
43437d04 DB	338	return 0;
0b50b3b1 KJ	339
0b50b3b1 KJ	340	#if defined(CONFIG_ACPI)
a9330845 PLB	341	switch (acpi_target_system_state()) {
a9330845 PLB	342	case ACPI_STATE_S0:
043ae13b	343	sdev->system_suspend_target = SOF_SUSPEND_S0IX;
a9330845 PLB	344	break;
	345	case ACPI_STATE_S1:
	346	case ACPI_STATE_S2:
	347	case ACPI_STATE_S3:
	348	sdev->system_suspend_target = SOF_SUSPEND_S3;
	349	break;
9d2d4627 PLB	350	case ACPI_STATE_S4:
	351	sdev->system_suspend_target = SOF_SUSPEND_S4;
	352	break;
	353	case ACPI_STATE_S5:
	354	sdev->system_suspend_target = SOF_SUSPEND_S5;
	355	break;
a9330845 PLB	356	default:
	357	break;
	358	}
0b50b3b1 KJ	359	#endif
	360
	361	return 0;
	362	}
	363	EXPORT_SYMBOL(snd_sof_prepare);
	364
	365	void snd_sof_complete(struct device *dev)
	366	{
	367	struct snd_sof_dev *sdev = dev_get_drvdata(dev);
	368
043ae13b	369	sdev->system_suspend_target = SOF_SUSPEND_NONE;
0b50b3b1 KJ	370	}
0b50b3b1 KJ	371	EXPORT_SYMBOL(snd_sof_complete);