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330 lines
7.9 KiB
330 lines
7.9 KiB
// 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 <[email protected]> |
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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_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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static int sof_send_pm_ctx_ipc(struct snd_sof_dev *sdev, int cmd) |
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{ |
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struct sof_ipc_pm_ctx pm_ctx; |
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struct sof_ipc_reply reply; |
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memset(&pm_ctx, 0, sizeof(pm_ctx)); |
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/* configure ctx save ipc message */ |
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pm_ctx.hdr.size = sizeof(pm_ctx); |
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pm_ctx.hdr.cmd = SOF_IPC_GLB_PM_MSG | cmd; |
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/* send ctx save ipc to dsp */ |
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return sof_ipc_tx_message(sdev->ipc, pm_ctx.hdr.cmd, &pm_ctx, |
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sizeof(pm_ctx), &reply, sizeof(reply)); |
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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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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. |
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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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return 0; |
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sdev->fw_state = 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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return ret; |
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} |
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sdev->fw_state = 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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return ret; |
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} |
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/* resume DMA trace, only need send ipc */ |
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ret = snd_sof_init_trace_ipc(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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ret = sof_restore_pipelines(sdev->dev); |
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if (ret < 0) { |
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dev_err(sdev->dev, |
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"error: failed to restore pipeline after resume %d\n", |
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ret); |
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return ret; |
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} |
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/* notify DSP of system resume */ |
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ret = sof_send_pm_ctx_ipc(sdev, SOF_IPC_PM_CTX_RESTORE); |
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if (ret < 0) |
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dev_err(sdev->dev, |
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"error: ctx_restore ipc error during resume %d\n", |
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ret); |
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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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u32 target_state = 0; |
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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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if (sdev->fw_state != SOF_FW_BOOT_COMPLETE) |
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goto suspend; |
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/* set restore_stream for all streams during system suspend */ |
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if (!runtime_suspend) { |
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ret = sof_set_hw_params_upon_resume(sdev->dev); |
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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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target_state = snd_sof_dsp_power_target(sdev); |
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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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goto suspend; |
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/* release trace */ |
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snd_sof_release_trace(sdev); |
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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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ret = sof_send_pm_ctx_ipc(sdev, SOF_IPC_PM_CTX_SAVE); |
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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, |
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"error: ctx_save ipc error during suspend %d\n", |
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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, |
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"ctx_save ipc error %d, proceeding with suspend\n", |
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ret); |
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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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sdev->fw_state = SOF_FW_BOOT_NOT_STARTED; |
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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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/* Notify DSP of upcoming power down */ |
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if (sof_ops(sdev)->remove) |
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return sof_send_pm_ctx_ipc(sdev, SOF_IPC_PM_CTX_SAVE); |
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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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if (!desc->use_acpi_target_states) |
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return 0; |
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#if defined(CONFIG_ACPI) |
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if (acpi_target_system_state() == ACPI_STATE_S0) |
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sdev->system_suspend_target = SOF_SUSPEND_S0IX; |
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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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