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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. 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_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;
- }
- static int sof_send_pm_ctx_ipc(struct snd_sof_dev *sdev, int cmd)
- {
- struct sof_ipc_pm_ctx pm_ctx;
- struct sof_ipc_reply reply;
- memset(&pm_ctx, 0, sizeof(pm_ctx));
- /* configure ctx save ipc message */
- pm_ctx.hdr.size = sizeof(pm_ctx);
- pm_ctx.hdr.cmd = SOF_IPC_GLB_PM_MSG | cmd;
- /* send ctx save ipc to dsp */
- return sof_ipc_tx_message(sdev->ipc, pm_ctx.hdr.cmd, &pm_ctx,
- sizeof(pm_ctx), &reply, sizeof(reply));
- }
- #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);
- 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.
- */
- if (!runtime_resume && sof_ops(sdev)->set_power_state &&
- old_state == SOF_DSP_PM_D0)
- return 0;
- sdev->fw_state = 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);
- return ret;
- }
- sdev->fw_state = 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);
- return ret;
- }
- /* resume DMA trace, only need send ipc */
- ret = snd_sof_init_trace_ipc(sdev);
- if (ret < 0) {
- /* non fatal */
- dev_warn(sdev->dev,
- "warning: failed to init trace after resume %d\n",
- ret);
- }
- /* restore pipelines */
- ret = sof_restore_pipelines(sdev->dev);
- if (ret < 0) {
- dev_err(sdev->dev,
- "error: failed to restore pipeline after resume %d\n",
- ret);
- return ret;
- }
- /* notify DSP of system resume */
- ret = sof_send_pm_ctx_ipc(sdev, SOF_IPC_PM_CTX_RESTORE);
- if (ret < 0)
- dev_err(sdev->dev,
- "error: 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);
- 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;
- /* set restore_stream for all streams during system suspend */
- if (!runtime_suspend) {
- ret = sof_set_hw_params_upon_resume(sdev->dev);
- 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);
- /* Skip to platform-specific suspend if DSP is entering D0 */
- if (target_state == SOF_DSP_PM_D0)
- goto suspend;
- /* release trace */
- snd_sof_release_trace(sdev);
- #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 */
- ret = sof_send_pm_ctx_ipc(sdev, SOF_IPC_PM_CTX_SAVE);
- if (ret == -EBUSY || ret == -EAGAIN) {
- /*
- * runtime PM has logic to handle -EBUSY/-EAGAIN so
- * pass these errors up
- */
- dev_err(sdev->dev,
- "error: 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 */
- sdev->fw_state = SOF_FW_BOOT_NOT_STARTED;
- sdev->enabled_cores_mask = 0;
- return ret;
- }
- int snd_sof_dsp_power_down_notify(struct snd_sof_dev *sdev)
- {
- /* Notify DSP of upcoming power down */
- if (sof_ops(sdev)->remove)
- return sof_send_pm_ctx_ipc(sdev, SOF_IPC_PM_CTX_SAVE);
- 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 (!desc->use_acpi_target_states)
- return 0;
- #if defined(CONFIG_ACPI)
- if (acpi_target_system_state() == ACPI_STATE_S0)
- sdev->system_suspend_target = SOF_SUSPEND_S0IX;
- #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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