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) {
27 /* DSP should be in D3 if the system is suspending to S3 */
28 target_dsp_state = SOF_DSP_PM_D3;
30 case SOF_SUSPEND_S0IX:
32 * Currently, the only criterion for retaining the DSP in D0
33 * is that there are streams that ignored the suspend trigger.
34 * Additional criteria such Soundwire clock-stop mode and
35 * device suspend latency considerations will be added later.
37 if (snd_sof_stream_suspend_ignored(sdev))
38 target_dsp_state = SOF_DSP_PM_D0;
40 target_dsp_state = SOF_DSP_PM_D3;
43 /* This case would be during runtime suspend */
44 target_dsp_state = SOF_DSP_PM_D3;
48 return target_dsp_state;
51 static int sof_send_pm_ctx_ipc(struct snd_sof_dev *sdev, int cmd)
53 struct sof_ipc_pm_ctx pm_ctx;
54 struct sof_ipc_reply reply;
56 memset(&pm_ctx, 0, sizeof(pm_ctx));
58 /* configure ctx save ipc message */
59 pm_ctx.hdr.size = sizeof(pm_ctx);
60 pm_ctx.hdr.cmd = SOF_IPC_GLB_PM_MSG | cmd;
62 /* send ctx save ipc to dsp */
63 return sof_ipc_tx_message(sdev->ipc, pm_ctx.hdr.cmd, &pm_ctx,
64 sizeof(pm_ctx), &reply, sizeof(reply));
67 #if IS_ENABLED(CONFIG_SND_SOC_SOF_DEBUG_ENABLE_DEBUGFS_CACHE)
68 static void sof_cache_debugfs(struct snd_sof_dev *sdev)
70 struct snd_sof_dfsentry *dfse;
72 list_for_each_entry(dfse, &sdev->dfsentry_list, list) {
74 /* nothing to do if debugfs buffer is not IO mem */
75 if (dfse->type == SOF_DFSENTRY_TYPE_BUF)
78 /* cache memory that is only accessible in D0 */
79 if (dfse->access_type == SOF_DEBUGFS_ACCESS_D0_ONLY)
80 memcpy_fromio(dfse->cache_buf, dfse->io_mem,
86 static int sof_resume(struct device *dev, bool runtime_resume)
88 struct snd_sof_dev *sdev = dev_get_drvdata(dev);
89 u32 old_state = sdev->dsp_power_state.state;
92 /* do nothing if dsp resume callbacks are not set */
93 if (!runtime_resume && !sof_ops(sdev)->resume)
96 if (runtime_resume && !sof_ops(sdev)->runtime_resume)
99 /* DSP was never successfully started, nothing to resume */
100 if (sdev->first_boot)
104 * if the runtime_resume flag is set, call the runtime_resume routine
105 * or else call the system resume routine
108 ret = snd_sof_dsp_runtime_resume(sdev);
110 ret = snd_sof_dsp_resume(sdev);
113 "error: failed to power up DSP after resume\n");
118 * Nothing further to be done for platforms that support the low power
121 if (!runtime_resume && sof_ops(sdev)->set_power_state &&
122 old_state == SOF_DSP_PM_D0)
125 sdev->fw_state = SOF_FW_BOOT_PREPARE;
127 /* load the firmware */
128 ret = snd_sof_load_firmware(sdev);
131 "error: failed to load DSP firmware after resume %d\n",
136 sdev->fw_state = SOF_FW_BOOT_IN_PROGRESS;
139 * Boot the firmware. The FW boot status will be modified
140 * in snd_sof_run_firmware() depending on the outcome.
142 ret = snd_sof_run_firmware(sdev);
145 "error: failed to boot DSP firmware after resume %d\n",
150 /* resume DMA trace, only need send ipc */
151 ret = snd_sof_init_trace_ipc(sdev);
155 "warning: failed to init trace after resume %d\n",
159 /* restore pipelines */
160 ret = sof_restore_pipelines(sdev->dev);
163 "error: failed to restore pipeline after resume %d\n",
168 /* notify DSP of system resume */
169 ret = sof_send_pm_ctx_ipc(sdev, SOF_IPC_PM_CTX_RESTORE);
172 "error: ctx_restore ipc error during resume %d\n",
178 static int sof_suspend(struct device *dev, bool runtime_suspend)
180 struct snd_sof_dev *sdev = dev_get_drvdata(dev);
181 u32 target_state = 0;
184 /* do nothing if dsp suspend callback is not set */
185 if (!runtime_suspend && !sof_ops(sdev)->suspend)
188 if (runtime_suspend && !sof_ops(sdev)->runtime_suspend)
191 if (sdev->fw_state != SOF_FW_BOOT_COMPLETE)
194 /* set restore_stream for all streams during system suspend */
195 if (!runtime_suspend) {
196 ret = sof_set_hw_params_upon_resume(sdev->dev);
199 "error: setting hw_params flag during suspend %d\n",
205 target_state = snd_sof_dsp_power_target(sdev);
207 /* Skip to platform-specific suspend if DSP is entering D0 */
208 if (target_state == SOF_DSP_PM_D0)
212 snd_sof_release_trace(sdev);
214 #if IS_ENABLED(CONFIG_SND_SOC_SOF_DEBUG_ENABLE_DEBUGFS_CACHE)
215 /* cache debugfs contents during runtime suspend */
217 sof_cache_debugfs(sdev);
219 /* notify DSP of upcoming power down */
220 ret = sof_send_pm_ctx_ipc(sdev, SOF_IPC_PM_CTX_SAVE);
221 if (ret == -EBUSY || ret == -EAGAIN) {
223 * runtime PM has logic to handle -EBUSY/-EAGAIN so
224 * pass these errors up
227 "error: ctx_save ipc error during suspend %d\n",
230 } else if (ret < 0) {
231 /* FW in unexpected state, continue to power down */
233 "ctx_save ipc error %d, proceeding with suspend\n",
239 /* return if the DSP was not probed successfully */
240 if (sdev->fw_state == SOF_FW_BOOT_NOT_STARTED)
243 /* platform-specific suspend */
245 ret = snd_sof_dsp_runtime_suspend(sdev);
247 ret = snd_sof_dsp_suspend(sdev, target_state);
250 "error: failed to power down DSP during suspend %d\n",
253 /* Do not reset FW state if DSP is in D0 */
254 if (target_state == SOF_DSP_PM_D0)
258 sdev->fw_state = SOF_FW_BOOT_NOT_STARTED;
259 sdev->enabled_cores_mask = 0;
264 int snd_sof_dsp_power_down_notify(struct snd_sof_dev *sdev)
266 /* Notify DSP of upcoming power down */
267 if (sof_ops(sdev)->remove)
268 return sof_send_pm_ctx_ipc(sdev, SOF_IPC_PM_CTX_SAVE);
273 int snd_sof_runtime_suspend(struct device *dev)
275 return sof_suspend(dev, true);
277 EXPORT_SYMBOL(snd_sof_runtime_suspend);
279 int snd_sof_runtime_idle(struct device *dev)
281 struct snd_sof_dev *sdev = dev_get_drvdata(dev);
283 return snd_sof_dsp_runtime_idle(sdev);
285 EXPORT_SYMBOL(snd_sof_runtime_idle);
287 int snd_sof_runtime_resume(struct device *dev)
289 return sof_resume(dev, true);
291 EXPORT_SYMBOL(snd_sof_runtime_resume);
293 int snd_sof_resume(struct device *dev)
295 return sof_resume(dev, false);
297 EXPORT_SYMBOL(snd_sof_resume);
299 int snd_sof_suspend(struct device *dev)
301 return sof_suspend(dev, false);
303 EXPORT_SYMBOL(snd_sof_suspend);
305 int snd_sof_prepare(struct device *dev)
307 struct snd_sof_dev *sdev = dev_get_drvdata(dev);
308 const struct sof_dev_desc *desc = sdev->pdata->desc;
310 /* will suspend to S3 by default */
311 sdev->system_suspend_target = SOF_SUSPEND_S3;
313 if (!desc->use_acpi_target_states)
316 #if defined(CONFIG_ACPI)
317 if (acpi_target_system_state() == ACPI_STATE_S0)
318 sdev->system_suspend_target = SOF_SUSPEND_S0IX;
323 EXPORT_SYMBOL(snd_sof_prepare);
325 void snd_sof_complete(struct device *dev)
327 struct snd_sof_dev *sdev = dev_get_drvdata(dev);
329 sdev->system_suspend_target = SOF_SUSPEND_NONE;
331 EXPORT_SYMBOL(snd_sof_complete);