1 // SPDX-License-Identifier: (GPL-2.0-only OR BSD-3-Clause)
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.
6 // Copyright(c) 2018 Intel Corporation. All rights reserved.
13 #include "sof-audio.h"
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.
21 static u32 snd_sof_dsp_power_target(struct snd_sof_dev *sdev)
25 switch (sdev->system_suspend_target) {
28 /* DSP should be in D3 if the system is suspending to S3+ */
30 /* DSP should be in D3 if the system is suspending to S3 */
31 target_dsp_state = SOF_DSP_PM_D3;
33 case SOF_SUSPEND_S0IX:
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.
40 if (snd_sof_stream_suspend_ignored(sdev))
41 target_dsp_state = SOF_DSP_PM_D0;
43 target_dsp_state = SOF_DSP_PM_D3;
46 /* This case would be during runtime suspend */
47 target_dsp_state = SOF_DSP_PM_D3;
51 return target_dsp_state;
54 #if IS_ENABLED(CONFIG_SND_SOC_SOF_DEBUG_ENABLE_DEBUGFS_CACHE)
55 static void sof_cache_debugfs(struct snd_sof_dev *sdev)
57 struct snd_sof_dfsentry *dfse;
59 list_for_each_entry(dfse, &sdev->dfsentry_list, list) {
61 /* nothing to do if debugfs buffer is not IO mem */
62 if (dfse->type == SOF_DFSENTRY_TYPE_BUF)
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,
73 static int sof_resume(struct device *dev, bool runtime_resume)
75 struct snd_sof_dev *sdev = dev_get_drvdata(dev);
76 const struct sof_ipc_pm_ops *pm_ops = sof_ipc_get_ops(sdev, pm);
77 const struct sof_ipc_tplg_ops *tplg_ops = sof_ipc_get_ops(sdev, tplg);
78 u32 old_state = sdev->dsp_power_state.state;
81 /* do nothing if dsp resume callbacks are not set */
82 if (!runtime_resume && !sof_ops(sdev)->resume)
85 if (runtime_resume && !sof_ops(sdev)->runtime_resume)
88 /* DSP was never successfully started, nothing to resume */
93 * if the runtime_resume flag is set, call the runtime_resume routine
94 * or else call the system resume routine
97 ret = snd_sof_dsp_runtime_resume(sdev);
99 ret = snd_sof_dsp_resume(sdev);
102 "error: failed to power up DSP after resume\n");
106 if (sdev->dspless_mode_selected) {
107 sof_set_fw_state(sdev, SOF_DSPLESS_MODE);
112 * Nothing further to be done for platforms that support the low power
113 * D0 substate. Resume trace and return when resuming from
114 * low-power D0 substate
116 if (!runtime_resume && sof_ops(sdev)->set_power_state &&
117 old_state == SOF_DSP_PM_D0) {
118 ret = sof_fw_trace_resume(sdev);
122 "failed to enable trace after resume %d\n", ret);
126 sof_set_fw_state(sdev, SOF_FW_BOOT_PREPARE);
128 /* load the firmware */
129 ret = snd_sof_load_firmware(sdev);
132 "error: failed to load DSP firmware after resume %d\n",
134 sof_set_fw_state(sdev, SOF_FW_BOOT_FAILED);
138 sof_set_fw_state(sdev, SOF_FW_BOOT_IN_PROGRESS);
141 * Boot the firmware. The FW boot status will be modified
142 * in snd_sof_run_firmware() depending on the outcome.
144 ret = snd_sof_run_firmware(sdev);
147 "error: failed to boot DSP firmware after resume %d\n",
149 sof_set_fw_state(sdev, SOF_FW_BOOT_FAILED);
153 /* resume DMA trace */
154 ret = sof_fw_trace_resume(sdev);
158 "warning: failed to init trace after resume %d\n",
162 /* restore pipelines */
163 if (tplg_ops && tplg_ops->set_up_all_pipelines) {
164 ret = tplg_ops->set_up_all_pipelines(sdev, false);
166 dev_err(sdev->dev, "Failed to restore pipeline after resume %d\n", ret);
171 /* Notify clients not managed by pm framework about core resume */
172 sof_resume_clients(sdev);
174 /* notify DSP of system resume */
175 if (pm_ops && pm_ops->ctx_restore) {
176 ret = pm_ops->ctx_restore(sdev);
178 dev_err(sdev->dev, "ctx_restore IPC error during resume: %d\n", ret);
182 #if IS_ENABLED(CONFIG_SND_SOC_SOF_DEBUG_ENABLE_DEBUGFS_CACHE)
185 * Debugfs cannot be read in runtime suspend, so cache
186 * the contents upon failure. This allows to capture
187 * possible DSP coredump information.
189 sof_cache_debugfs(sdev);
196 static int sof_suspend(struct device *dev, bool runtime_suspend)
198 struct snd_sof_dev *sdev = dev_get_drvdata(dev);
199 const struct sof_ipc_pm_ops *pm_ops = sof_ipc_get_ops(sdev, pm);
200 const struct sof_ipc_tplg_ops *tplg_ops = sof_ipc_get_ops(sdev, tplg);
201 pm_message_t pm_state;
202 u32 target_state = snd_sof_dsp_power_target(sdev);
203 u32 old_state = sdev->dsp_power_state.state;
206 /* do nothing if dsp suspend callback is not set */
207 if (!runtime_suspend && !sof_ops(sdev)->suspend)
210 if (runtime_suspend && !sof_ops(sdev)->runtime_suspend)
213 /* we need to tear down pipelines only if the DSP hardware is
214 * active, which happens for PCI devices. if the device is
215 * suspended, it is brought back to full power and then
218 if (tplg_ops && tplg_ops->tear_down_all_pipelines && (old_state == SOF_DSP_PM_D0))
219 tplg_ops->tear_down_all_pipelines(sdev, false);
221 if (sdev->fw_state != SOF_FW_BOOT_COMPLETE)
224 /* prepare for streams to be resumed properly upon resume */
225 if (!runtime_suspend) {
226 ret = snd_sof_dsp_hw_params_upon_resume(sdev);
229 "error: setting hw_params flag during suspend %d\n",
235 pm_state.event = target_state;
237 /* suspend DMA trace */
238 sof_fw_trace_suspend(sdev, pm_state);
240 /* Notify clients not managed by pm framework about core suspend */
241 sof_suspend_clients(sdev, pm_state);
243 /* Skip to platform-specific suspend if DSP is entering D0 */
244 if (target_state == SOF_DSP_PM_D0)
247 #if IS_ENABLED(CONFIG_SND_SOC_SOF_DEBUG_ENABLE_DEBUGFS_CACHE)
248 /* cache debugfs contents during runtime suspend */
250 sof_cache_debugfs(sdev);
252 /* notify DSP of upcoming power down */
253 if (pm_ops && pm_ops->ctx_save) {
254 ret = pm_ops->ctx_save(sdev);
255 if (ret == -EBUSY || ret == -EAGAIN) {
257 * runtime PM has logic to handle -EBUSY/-EAGAIN so
258 * pass these errors up
260 dev_err(sdev->dev, "ctx_save IPC error during suspend: %d\n", ret);
262 } else if (ret < 0) {
263 /* FW in unexpected state, continue to power down */
264 dev_warn(sdev->dev, "ctx_save IPC error: %d, proceeding with suspend\n",
271 /* return if the DSP was not probed successfully */
272 if (sdev->fw_state == SOF_FW_BOOT_NOT_STARTED)
275 /* platform-specific suspend */
277 ret = snd_sof_dsp_runtime_suspend(sdev);
279 ret = snd_sof_dsp_suspend(sdev, target_state);
282 "error: failed to power down DSP during suspend %d\n",
285 /* Do not reset FW state if DSP is in D0 */
286 if (target_state == SOF_DSP_PM_D0)
290 sof_set_fw_state(sdev, SOF_FW_BOOT_NOT_STARTED);
291 sdev->enabled_cores_mask = 0;
296 int snd_sof_dsp_power_down_notify(struct snd_sof_dev *sdev)
298 const struct sof_ipc_pm_ops *pm_ops = sof_ipc_get_ops(sdev, pm);
300 /* Notify DSP of upcoming power down */
301 if (sof_ops(sdev)->remove && pm_ops && pm_ops->ctx_save)
302 return pm_ops->ctx_save(sdev);
307 int snd_sof_runtime_suspend(struct device *dev)
309 return sof_suspend(dev, true);
311 EXPORT_SYMBOL(snd_sof_runtime_suspend);
313 int snd_sof_runtime_idle(struct device *dev)
315 struct snd_sof_dev *sdev = dev_get_drvdata(dev);
317 return snd_sof_dsp_runtime_idle(sdev);
319 EXPORT_SYMBOL(snd_sof_runtime_idle);
321 int snd_sof_runtime_resume(struct device *dev)
323 return sof_resume(dev, true);
325 EXPORT_SYMBOL(snd_sof_runtime_resume);
327 int snd_sof_resume(struct device *dev)
329 return sof_resume(dev, false);
331 EXPORT_SYMBOL(snd_sof_resume);
333 int snd_sof_suspend(struct device *dev)
335 return sof_suspend(dev, false);
337 EXPORT_SYMBOL(snd_sof_suspend);
339 int snd_sof_prepare(struct device *dev)
341 struct snd_sof_dev *sdev = dev_get_drvdata(dev);
342 const struct sof_dev_desc *desc = sdev->pdata->desc;
344 /* will suspend to S3 by default */
345 sdev->system_suspend_target = SOF_SUSPEND_S3;
348 * if the firmware is crashed or boot failed then we try to aim for S3
349 * to reboot the firmware
351 if (sdev->fw_state == SOF_FW_CRASHED ||
352 sdev->fw_state == SOF_FW_BOOT_FAILED)
355 if (!desc->use_acpi_target_states)
358 #if defined(CONFIG_ACPI)
359 switch (acpi_target_system_state()) {
361 sdev->system_suspend_target = SOF_SUSPEND_S0IX;
366 sdev->system_suspend_target = SOF_SUSPEND_S3;
369 sdev->system_suspend_target = SOF_SUSPEND_S4;
372 sdev->system_suspend_target = SOF_SUSPEND_S5;
381 EXPORT_SYMBOL(snd_sof_prepare);
383 void snd_sof_complete(struct device *dev)
385 struct snd_sof_dev *sdev = dev_get_drvdata(dev);
387 sdev->system_suspend_target = SOF_SUSPEND_NONE;
389 EXPORT_SYMBOL(snd_sof_complete);