389 lines
9.9 KiB
C
389 lines
9.9 KiB
C
// SPDX-License-Identifier: (GPL-2.0-only OR BSD-3-Clause)
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//
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// This file is provided under a dual BSD/GPLv2 license. When using or
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// redistributing this file, you may do so under either license.
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//
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// Copyright(c) 2018 Intel Corporation. All rights reserved.
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//
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// Author: Liam Girdwood <liam.r.girdwood@linux.intel.com>
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//
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#include "ops.h"
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#include "sof-priv.h"
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#include "sof-audio.h"
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/*
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* Helper function to determine the target DSP state during
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* system suspend. This function only cares about the device
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* D-states. Platform-specific substates, if any, should be
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* handled by the platform-specific parts.
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*/
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static u32 snd_sof_dsp_power_target(struct snd_sof_dev *sdev)
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{
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u32 target_dsp_state;
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switch (sdev->system_suspend_target) {
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case SOF_SUSPEND_S5:
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case SOF_SUSPEND_S4:
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/* DSP should be in D3 if the system is suspending to S3+ */
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case SOF_SUSPEND_S3:
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/* DSP should be in D3 if the system is suspending to S3 */
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target_dsp_state = SOF_DSP_PM_D3;
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break;
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case SOF_SUSPEND_S0IX:
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/*
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* Currently, the only criterion for retaining the DSP in D0
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* is that there are streams that ignored the suspend trigger.
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* Additional criteria such Soundwire clock-stop mode and
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* device suspend latency considerations will be added later.
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*/
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if (snd_sof_stream_suspend_ignored(sdev))
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target_dsp_state = SOF_DSP_PM_D0;
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else
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target_dsp_state = SOF_DSP_PM_D3;
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break;
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default:
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/* This case would be during runtime suspend */
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target_dsp_state = SOF_DSP_PM_D3;
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break;
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}
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return target_dsp_state;
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}
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#if IS_ENABLED(CONFIG_SND_SOC_SOF_DEBUG_ENABLE_DEBUGFS_CACHE)
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static void sof_cache_debugfs(struct snd_sof_dev *sdev)
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{
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struct snd_sof_dfsentry *dfse;
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list_for_each_entry(dfse, &sdev->dfsentry_list, list) {
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/* nothing to do if debugfs buffer is not IO mem */
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if (dfse->type == SOF_DFSENTRY_TYPE_BUF)
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continue;
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/* cache memory that is only accessible in D0 */
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if (dfse->access_type == SOF_DEBUGFS_ACCESS_D0_ONLY)
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memcpy_fromio(dfse->cache_buf, dfse->io_mem,
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dfse->size);
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}
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}
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#endif
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static int sof_resume(struct device *dev, bool runtime_resume)
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{
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struct snd_sof_dev *sdev = dev_get_drvdata(dev);
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const struct sof_ipc_pm_ops *pm_ops = sdev->ipc->ops->pm;
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const struct sof_ipc_tplg_ops *tplg_ops = sdev->ipc->ops->tplg;
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u32 old_state = sdev->dsp_power_state.state;
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int ret;
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/* do nothing if dsp resume callbacks are not set */
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if (!runtime_resume && !sof_ops(sdev)->resume)
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return 0;
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if (runtime_resume && !sof_ops(sdev)->runtime_resume)
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return 0;
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/* DSP was never successfully started, nothing to resume */
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if (sdev->first_boot)
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return 0;
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/*
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* if the runtime_resume flag is set, call the runtime_resume routine
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* or else call the system resume routine
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*/
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if (runtime_resume)
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ret = snd_sof_dsp_runtime_resume(sdev);
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else
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ret = snd_sof_dsp_resume(sdev);
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if (ret < 0) {
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dev_err(sdev->dev,
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"error: failed to power up DSP after resume\n");
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return ret;
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}
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/*
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* Nothing further to be done for platforms that support the low power
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* D0 substate. Resume trace and return when resuming from
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* low-power D0 substate
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*/
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if (!runtime_resume && sof_ops(sdev)->set_power_state &&
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old_state == SOF_DSP_PM_D0) {
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ret = sof_fw_trace_resume(sdev);
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if (ret < 0)
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/* non fatal */
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dev_warn(sdev->dev,
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"failed to enable trace after resume %d\n", ret);
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return 0;
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}
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sof_set_fw_state(sdev, SOF_FW_BOOT_PREPARE);
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/* load the firmware */
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ret = snd_sof_load_firmware(sdev);
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if (ret < 0) {
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dev_err(sdev->dev,
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"error: failed to load DSP firmware after resume %d\n",
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ret);
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sof_set_fw_state(sdev, SOF_FW_BOOT_FAILED);
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return ret;
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}
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sof_set_fw_state(sdev, SOF_FW_BOOT_IN_PROGRESS);
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/*
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* Boot the firmware. The FW boot status will be modified
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* in snd_sof_run_firmware() depending on the outcome.
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*/
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ret = snd_sof_run_firmware(sdev);
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if (ret < 0) {
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dev_err(sdev->dev,
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"error: failed to boot DSP firmware after resume %d\n",
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ret);
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sof_set_fw_state(sdev, SOF_FW_BOOT_FAILED);
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return ret;
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}
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/* resume DMA trace */
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ret = sof_fw_trace_resume(sdev);
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if (ret < 0) {
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/* non fatal */
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dev_warn(sdev->dev,
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"warning: failed to init trace after resume %d\n",
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ret);
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}
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/* restore pipelines */
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if (tplg_ops->set_up_all_pipelines) {
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ret = tplg_ops->set_up_all_pipelines(sdev, false);
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if (ret < 0) {
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dev_err(sdev->dev, "Failed to restore pipeline after resume %d\n", ret);
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goto setup_fail;
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}
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}
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/* Notify clients not managed by pm framework about core resume */
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sof_resume_clients(sdev);
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/* notify DSP of system resume */
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if (pm_ops && pm_ops->ctx_restore) {
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ret = pm_ops->ctx_restore(sdev);
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if (ret < 0)
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dev_err(sdev->dev, "ctx_restore IPC error during resume: %d\n", ret);
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}
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setup_fail:
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#if IS_ENABLED(CONFIG_SND_SOC_SOF_DEBUG_ENABLE_DEBUGFS_CACHE)
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if (ret < 0) {
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/*
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* Debugfs cannot be read in runtime suspend, so cache
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* the contents upon failure. This allows to capture
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* possible DSP coredump information.
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*/
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sof_cache_debugfs(sdev);
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}
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#endif
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return ret;
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}
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static int sof_suspend(struct device *dev, bool runtime_suspend)
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{
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struct snd_sof_dev *sdev = dev_get_drvdata(dev);
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const struct sof_ipc_pm_ops *pm_ops = sdev->ipc->ops->pm;
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const struct sof_ipc_tplg_ops *tplg_ops = sdev->ipc->ops->tplg;
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pm_message_t pm_state;
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u32 target_state = snd_sof_dsp_power_target(sdev);
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u32 old_state = sdev->dsp_power_state.state;
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int ret;
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/* do nothing if dsp suspend callback is not set */
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if (!runtime_suspend && !sof_ops(sdev)->suspend)
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return 0;
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if (runtime_suspend && !sof_ops(sdev)->runtime_suspend)
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return 0;
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/* we need to tear down pipelines only if the DSP hardware is
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* active, which happens for PCI devices. if the device is
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* suspended, it is brought back to full power and then
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* suspended again
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*/
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if (tplg_ops && tplg_ops->tear_down_all_pipelines && (old_state == SOF_DSP_PM_D0))
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tplg_ops->tear_down_all_pipelines(sdev, false);
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if (sdev->fw_state != SOF_FW_BOOT_COMPLETE)
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goto suspend;
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/* prepare for streams to be resumed properly upon resume */
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if (!runtime_suspend) {
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ret = snd_sof_dsp_hw_params_upon_resume(sdev);
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if (ret < 0) {
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dev_err(sdev->dev,
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"error: setting hw_params flag during suspend %d\n",
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ret);
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return ret;
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}
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}
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pm_state.event = target_state;
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/* Skip to platform-specific suspend if DSP is entering D0 */
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if (target_state == SOF_DSP_PM_D0) {
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sof_fw_trace_suspend(sdev, pm_state);
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/* Notify clients not managed by pm framework about core suspend */
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sof_suspend_clients(sdev, pm_state);
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goto suspend;
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}
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/* suspend DMA trace */
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sof_fw_trace_suspend(sdev, pm_state);
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/* Notify clients not managed by pm framework about core suspend */
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sof_suspend_clients(sdev, pm_state);
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#if IS_ENABLED(CONFIG_SND_SOC_SOF_DEBUG_ENABLE_DEBUGFS_CACHE)
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/* cache debugfs contents during runtime suspend */
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if (runtime_suspend)
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sof_cache_debugfs(sdev);
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#endif
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/* notify DSP of upcoming power down */
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if (pm_ops && pm_ops->ctx_save) {
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ret = pm_ops->ctx_save(sdev);
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if (ret == -EBUSY || ret == -EAGAIN) {
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/*
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* runtime PM has logic to handle -EBUSY/-EAGAIN so
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* pass these errors up
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*/
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dev_err(sdev->dev, "ctx_save IPC error during suspend: %d\n", ret);
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return ret;
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} else if (ret < 0) {
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/* FW in unexpected state, continue to power down */
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dev_warn(sdev->dev, "ctx_save IPC error: %d, proceeding with suspend\n",
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ret);
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}
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}
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suspend:
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/* return if the DSP was not probed successfully */
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if (sdev->fw_state == SOF_FW_BOOT_NOT_STARTED)
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return 0;
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/* platform-specific suspend */
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if (runtime_suspend)
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ret = snd_sof_dsp_runtime_suspend(sdev);
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else
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ret = snd_sof_dsp_suspend(sdev, target_state);
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if (ret < 0)
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dev_err(sdev->dev,
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"error: failed to power down DSP during suspend %d\n",
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ret);
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/* Do not reset FW state if DSP is in D0 */
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if (target_state == SOF_DSP_PM_D0)
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return ret;
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/* reset FW state */
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sof_set_fw_state(sdev, SOF_FW_BOOT_NOT_STARTED);
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sdev->enabled_cores_mask = 0;
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return ret;
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}
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int snd_sof_dsp_power_down_notify(struct snd_sof_dev *sdev)
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{
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const struct sof_ipc_pm_ops *pm_ops = sdev->ipc->ops->pm;
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/* Notify DSP of upcoming power down */
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if (sof_ops(sdev)->remove && pm_ops && pm_ops->ctx_save)
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return pm_ops->ctx_save(sdev);
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return 0;
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}
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int snd_sof_runtime_suspend(struct device *dev)
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{
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return sof_suspend(dev, true);
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}
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EXPORT_SYMBOL(snd_sof_runtime_suspend);
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int snd_sof_runtime_idle(struct device *dev)
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{
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struct snd_sof_dev *sdev = dev_get_drvdata(dev);
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return snd_sof_dsp_runtime_idle(sdev);
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}
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EXPORT_SYMBOL(snd_sof_runtime_idle);
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int snd_sof_runtime_resume(struct device *dev)
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{
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return sof_resume(dev, true);
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}
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EXPORT_SYMBOL(snd_sof_runtime_resume);
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int snd_sof_resume(struct device *dev)
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{
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return sof_resume(dev, false);
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}
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EXPORT_SYMBOL(snd_sof_resume);
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int snd_sof_suspend(struct device *dev)
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{
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return sof_suspend(dev, false);
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}
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EXPORT_SYMBOL(snd_sof_suspend);
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int snd_sof_prepare(struct device *dev)
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{
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struct snd_sof_dev *sdev = dev_get_drvdata(dev);
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const struct sof_dev_desc *desc = sdev->pdata->desc;
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/* will suspend to S3 by default */
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sdev->system_suspend_target = SOF_SUSPEND_S3;
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/*
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* if the firmware is crashed or boot failed then we try to aim for S3
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* to reboot the firmware
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*/
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if (sdev->fw_state == SOF_FW_CRASHED ||
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sdev->fw_state == SOF_FW_BOOT_FAILED)
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return 0;
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if (!desc->use_acpi_target_states)
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return 0;
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#if defined(CONFIG_ACPI)
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switch (acpi_target_system_state()) {
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case ACPI_STATE_S0:
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sdev->system_suspend_target = SOF_SUSPEND_S0IX;
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break;
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case ACPI_STATE_S1:
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case ACPI_STATE_S2:
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case ACPI_STATE_S3:
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sdev->system_suspend_target = SOF_SUSPEND_S3;
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break;
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case ACPI_STATE_S4:
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sdev->system_suspend_target = SOF_SUSPEND_S4;
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break;
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case ACPI_STATE_S5:
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sdev->system_suspend_target = SOF_SUSPEND_S5;
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break;
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default:
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break;
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}
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#endif
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return 0;
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}
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EXPORT_SYMBOL(snd_sof_prepare);
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void snd_sof_complete(struct device *dev)
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{
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struct snd_sof_dev *sdev = dev_get_drvdata(dev);
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sdev->system_suspend_target = SOF_SUSPEND_NONE;
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}
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EXPORT_SYMBOL(snd_sof_complete);
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