2020-05-01 22:58:50 +08:00
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// SPDX-License-Identifier: (GPL-2.0-only OR BSD-3-Clause)
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2019-04-13 00:05:16 +08:00
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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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2019-12-05 05:15:51 +08:00
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#include "sof-audio.h"
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2019-04-13 00:05:16 +08:00
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2020-01-30 06:07:21 +08:00
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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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2019-10-26 06:41:08 +08:00
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static int sof_send_pm_ctx_ipc(struct snd_sof_dev *sdev, int cmd)
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2019-04-13 00:05:16 +08:00
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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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2020-01-30 06:07:22 +08:00
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u32 old_state = sdev->dsp_power_state.state;
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2019-04-13 00:05:16 +08:00
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int ret;
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/* do nothing if dsp resume callbacks are not set */
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if (!sof_ops(sdev)->resume || !sof_ops(sdev)->runtime_resume)
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return 0;
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2020-01-25 05:36:21 +08:00
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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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2019-04-13 00:05:16 +08:00
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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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2020-01-30 06:07:22 +08:00
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/* Nothing further to do if resuming from a low-power D0 substate */
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if (!runtime_resume && old_state == SOF_DSP_PM_D0)
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2020-01-30 06:07:19 +08:00
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return 0;
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2019-12-18 08:26:09 +08:00
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sdev->fw_state = SOF_FW_BOOT_PREPARE;
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2019-04-13 00:05:16 +08:00
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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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2019-12-18 08:26:09 +08:00
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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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2019-04-13 00:05:16 +08:00
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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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2019-12-05 05:15:51 +08:00
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ret = sof_restore_pipelines(sdev->dev);
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2019-04-13 00:05:16 +08:00
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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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2019-10-26 06:41:08 +08:00
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ret = sof_send_pm_ctx_ipc(sdev, SOF_IPC_PM_CTX_RESTORE);
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2019-04-13 00:05:16 +08:00
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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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2020-01-30 06:07:22 +08:00
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u32 target_state = 0;
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2019-04-13 00:05:16 +08:00
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int ret;
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/* do nothing if dsp suspend callback is not set */
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if (!sof_ops(sdev)->suspend)
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return 0;
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2019-12-18 08:26:09 +08:00
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if (sdev->fw_state != SOF_FW_BOOT_COMPLETE)
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2020-01-30 06:07:19 +08:00
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goto suspend;
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2019-04-13 00:05:16 +08:00
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/* set restore_stream for all streams during system suspend */
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2019-06-13 01:23:38 +08:00
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if (!runtime_suspend) {
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2019-12-05 05:15:51 +08:00
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ret = sof_set_hw_params_upon_resume(sdev->dev);
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2019-06-13 01:23:38 +08:00
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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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2019-04-13 00:05:16 +08:00
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2020-01-30 06:07:22 +08:00
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target_state = snd_sof_dsp_power_target(sdev);
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2020-01-30 06:07:19 +08:00
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2020-01-30 06:07:22 +08:00
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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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2020-01-30 06:07:19 +08:00
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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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2019-04-13 00:05:16 +08:00
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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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2019-10-26 06:41:08 +08:00
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ret = sof_send_pm_ctx_ipc(sdev, SOF_IPC_PM_CTX_SAVE);
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2019-06-13 00:57:04 +08:00
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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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2019-04-13 00:05:16 +08:00
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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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2019-06-13 00:57:04 +08:00
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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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2019-04-13 00:05:16 +08:00
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}
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2020-01-30 06:07:19 +08:00
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suspend:
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2019-12-18 08:26:09 +08:00
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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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2020-01-30 06:07:19 +08:00
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/* platform-specific suspend */
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2019-04-13 00:05:16 +08:00
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if (runtime_suspend)
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2019-07-22 22:13:50 +08:00
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ret = snd_sof_dsp_runtime_suspend(sdev);
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2019-04-13 00:05:16 +08:00
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else
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2020-01-30 06:07:22 +08:00
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ret = snd_sof_dsp_suspend(sdev, target_state);
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2019-04-13 00:05:16 +08:00
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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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2020-01-30 06:07:22 +08:00
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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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2020-01-30 06:07:19 +08:00
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return ret;
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2019-12-18 08:26:09 +08:00
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/* reset FW state */
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sdev->fw_state = SOF_FW_BOOT_NOT_STARTED;
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2019-04-13 00:05:16 +08:00
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return ret;
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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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2019-07-02 21:24:27 +08:00
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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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2019-04-13 00:05:16 +08:00
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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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2019-10-26 06:41:17 +08:00
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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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#if defined(CONFIG_ACPI)
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2020-01-30 06:07:20 +08:00
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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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else
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sdev->system_suspend_target = SOF_SUSPEND_S3;
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2019-10-26 06:41:17 +08:00
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#else
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/* will suspend to S3 by default */
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2020-01-30 06:07:20 +08:00
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sdev->system_suspend_target = SOF_SUSPEND_S3;
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2019-10-26 06:41:17 +08:00
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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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2020-01-30 06:07:20 +08:00
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sdev->system_suspend_target = SOF_SUSPEND_NONE;
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2019-10-26 06:41:17 +08:00
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}
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EXPORT_SYMBOL(snd_sof_complete);
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