// 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 <liam.r.girdwood@linux.intel.com> //
/* * 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;
}
/* 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
/* 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
/* 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;
}
}
/* 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;
} elseif (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;
/* 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;
#ifdefined(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
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