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linux-next/sound/soc/sof/pcm.c
Ranjani Sridharan 82b18242ae
ASoC: SOF: pcm: do not free widgets during suspend trigger 
IPC3 and IPC4 have different requirements for the order in which the FE
CPU and BE CPU DAI trigger callbacks must be invoked. With a regular PCM
start/stop, pipeline widgets are set up during hw_params and freed
during hw_free.

But when the system is suspended when a PCM is running,
pipeline widgets are freed during the SUSPEND trigger callback for the
FE CPU DAI. In order to avoid freeing the pipeline widgets before the BE
CPU DAI trigger is executed, the trigger order was modified in previous
contributions in the PCM dai_link_fixup callback to make sure that the BE
CPU DAI trigger stop/suspend is always invoked before the FE CPU DAI
trigger. But this contradicts the firmware requirement for IPC4 w.r.t.
ordering of pipeline triggers.

So, remove the freeing of pipeline widgets during FE CPU DAI suspend
trigger and handle it during system suspend when the
tear_down_all_pipelines() IPC op is invoked. This will be followed up
with a patch to fix the trigger order for IPC4.

Signed-off-by: Ranjani Sridharan <ranjani.sridharan@linux.intel.com>
Reviewed-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Reviewed-by: Bard Liao <yung-chuan.liao@linux.intel.com>
Reviewed-by: Péter Ujfalusi <peter.ujfalusi@linux.intel.com>
Signed-off-by: Peter Ujfalusi <peter.ujfalusi@linux.intel.com>
Link: https://lore.kernel.org/r/20230127120031.10709-6-peter.ujfalusi@linux.intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>
2023-01-27 12:14:02 +00:00

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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>
//
// PCM Layer, interface between ALSA and IPC.
//
#include <linux/pm_runtime.h>
#include <sound/pcm_params.h>
#include <sound/sof.h>
#include <trace/events/sof.h>
#include "sof-of-dev.h"
#include "sof-priv.h"
#include "sof-audio.h"
#include "sof-utils.h"
#include "ops.h"
/* Create DMA buffer page table for DSP */
static int create_page_table(struct snd_soc_component *component,
struct snd_pcm_substream *substream,
unsigned char *dma_area, size_t size)
{
struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
struct snd_sof_pcm *spcm;
struct snd_dma_buffer *dmab = snd_pcm_get_dma_buf(substream);
int stream = substream->stream;
spcm = snd_sof_find_spcm_dai(component, rtd);
if (!spcm)
return -EINVAL;
return snd_sof_create_page_table(component->dev, dmab,
spcm->stream[stream].page_table.area, size);
}
/*
* sof pcm period elapse work
*/
static void snd_sof_pcm_period_elapsed_work(struct work_struct *work)
{
struct snd_sof_pcm_stream *sps =
container_of(work, struct snd_sof_pcm_stream,
period_elapsed_work);
snd_pcm_period_elapsed(sps->substream);
}
void snd_sof_pcm_init_elapsed_work(struct work_struct *work)
{
INIT_WORK(work, snd_sof_pcm_period_elapsed_work);
}
/*
* sof pcm period elapse, this could be called at irq thread context.
*/
void snd_sof_pcm_period_elapsed(struct snd_pcm_substream *substream)
{
struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
struct snd_soc_component *component =
snd_soc_rtdcom_lookup(rtd, SOF_AUDIO_PCM_DRV_NAME);
struct snd_sof_pcm *spcm;
spcm = snd_sof_find_spcm_dai(component, rtd);
if (!spcm) {
dev_err(component->dev,
"error: period elapsed for unknown stream!\n");
return;
}
/*
* snd_pcm_period_elapsed() can be called in interrupt context
* before IRQ_HANDLED is returned. Inside snd_pcm_period_elapsed(),
* when the PCM is done draining or xrun happened, a STOP IPC will
* then be sent and this IPC will hit IPC timeout.
* To avoid sending IPC before the previous IPC is handled, we
* schedule delayed work here to call the snd_pcm_period_elapsed().
*/
schedule_work(&spcm->stream[substream->stream].period_elapsed_work);
}
EXPORT_SYMBOL(snd_sof_pcm_period_elapsed);
static int
sof_pcm_setup_connected_widgets(struct snd_sof_dev *sdev, struct snd_soc_pcm_runtime *rtd,
struct snd_sof_pcm *spcm, struct snd_pcm_hw_params *params,
struct snd_sof_platform_stream_params *platform_params, int dir)
{
struct snd_soc_dai *dai;
int ret, j;
/* query DAPM for list of connected widgets and set them up */
for_each_rtd_cpu_dais(rtd, j, dai) {
struct snd_soc_dapm_widget_list *list;
ret = snd_soc_dapm_dai_get_connected_widgets(dai, dir, &list,
dpcm_end_walk_at_be);
if (ret < 0) {
dev_err(sdev->dev, "error: dai %s has no valid %s path\n", dai->name,
dir == SNDRV_PCM_STREAM_PLAYBACK ? "playback" : "capture");
return ret;
}
spcm->stream[dir].list = list;
ret = sof_widget_list_setup(sdev, spcm, params, platform_params, dir);
if (ret < 0) {
dev_err(sdev->dev, "error: failed widget list set up for pcm %d dir %d\n",
spcm->pcm.pcm_id, dir);
spcm->stream[dir].list = NULL;
snd_soc_dapm_dai_free_widgets(&list);
return ret;
}
}
return 0;
}
static int sof_pcm_hw_params(struct snd_soc_component *component,
struct snd_pcm_substream *substream,
struct snd_pcm_hw_params *params)
{
struct snd_sof_dev *sdev = snd_soc_component_get_drvdata(component);
struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
const struct sof_ipc_pcm_ops *pcm_ops = sof_ipc_get_ops(sdev, pcm);
struct snd_sof_platform_stream_params platform_params = { 0 };
struct snd_pcm_runtime *runtime = substream->runtime;
struct snd_sof_pcm *spcm;
int ret;
/* nothing to do for BE */
if (rtd->dai_link->no_pcm)
return 0;
spcm = snd_sof_find_spcm_dai(component, rtd);
if (!spcm)
return -EINVAL;
/*
* Handle repeated calls to hw_params() without free_pcm() in
* between. At least ALSA OSS emulation depends on this.
*/
if (pcm_ops && pcm_ops->hw_free && spcm->prepared[substream->stream]) {
ret = pcm_ops->hw_free(component, substream);
if (ret < 0)
return ret;
spcm->prepared[substream->stream] = false;
}
dev_dbg(component->dev, "pcm: hw params stream %d dir %d\n",
spcm->pcm.pcm_id, substream->stream);
ret = snd_sof_pcm_platform_hw_params(sdev, substream, params, &platform_params);
if (ret < 0) {
dev_err(component->dev, "platform hw params failed\n");
return ret;
}
/* if this is a repeated hw_params without hw_free, skip setting up widgets */
if (!spcm->stream[substream->stream].list) {
ret = sof_pcm_setup_connected_widgets(sdev, rtd, spcm, params, &platform_params,
substream->stream);
if (ret < 0)
return ret;
}
/* create compressed page table for audio firmware */
if (runtime->buffer_changed) {
ret = create_page_table(component, substream, runtime->dma_area,
runtime->dma_bytes);
if (ret < 0)
return ret;
}
if (pcm_ops && pcm_ops->hw_params) {
ret = pcm_ops->hw_params(component, substream, params, &platform_params);
if (ret < 0)
return ret;
}
spcm->prepared[substream->stream] = true;
/* save pcm hw_params */
memcpy(&spcm->params[substream->stream], params, sizeof(*params));
return 0;
}
static int sof_pcm_hw_free(struct snd_soc_component *component,
struct snd_pcm_substream *substream)
{
struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
struct snd_sof_dev *sdev = snd_soc_component_get_drvdata(component);
const struct sof_ipc_pcm_ops *pcm_ops = sof_ipc_get_ops(sdev, pcm);
struct snd_sof_pcm *spcm;
int ret, err = 0;
/* nothing to do for BE */
if (rtd->dai_link->no_pcm)
return 0;
spcm = snd_sof_find_spcm_dai(component, rtd);
if (!spcm)
return -EINVAL;
dev_dbg(component->dev, "pcm: free stream %d dir %d\n",
spcm->pcm.pcm_id, substream->stream);
/* free PCM in the DSP */
if (pcm_ops && pcm_ops->hw_free && spcm->prepared[substream->stream]) {
ret = pcm_ops->hw_free(component, substream);
if (ret < 0)
err = ret;
spcm->prepared[substream->stream] = false;
}
/* stop DMA */
ret = snd_sof_pcm_platform_hw_free(sdev, substream);
if (ret < 0) {
dev_err(component->dev, "error: platform hw free failed\n");
err = ret;
}
/* free the DAPM widget list */
ret = sof_widget_list_free(sdev, spcm, substream->stream);
if (ret < 0)
err = ret;
cancel_work_sync(&spcm->stream[substream->stream].period_elapsed_work);
return err;
}
static int sof_pcm_prepare(struct snd_soc_component *component,
struct snd_pcm_substream *substream)
{
struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
struct snd_sof_pcm *spcm;
int ret;
/* nothing to do for BE */
if (rtd->dai_link->no_pcm)
return 0;
spcm = snd_sof_find_spcm_dai(component, rtd);
if (!spcm)
return -EINVAL;
if (spcm->prepared[substream->stream])
return 0;
dev_dbg(component->dev, "pcm: prepare stream %d dir %d\n",
spcm->pcm.pcm_id, substream->stream);
/* set hw_params */
ret = sof_pcm_hw_params(component,
substream, &spcm->params[substream->stream]);
if (ret < 0) {
dev_err(component->dev,
"error: set pcm hw_params after resume\n");
return ret;
}
return 0;
}
/*
* FE dai link trigger actions are always executed in non-atomic context because
* they involve IPC's.
*/
static int sof_pcm_trigger(struct snd_soc_component *component,
struct snd_pcm_substream *substream, int cmd)
{
struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
struct snd_sof_dev *sdev = snd_soc_component_get_drvdata(component);
const struct sof_ipc_pcm_ops *pcm_ops = sof_ipc_get_ops(sdev, pcm);
struct snd_sof_pcm *spcm;
bool reset_hw_params = false;
bool ipc_first = false;
int ret = 0;
/* nothing to do for BE */
if (rtd->dai_link->no_pcm)
return 0;
spcm = snd_sof_find_spcm_dai(component, rtd);
if (!spcm)
return -EINVAL;
dev_dbg(component->dev, "pcm: trigger stream %d dir %d cmd %d\n",
spcm->pcm.pcm_id, substream->stream, cmd);
switch (cmd) {
case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
ipc_first = true;
break;
case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
break;
case SNDRV_PCM_TRIGGER_START:
if (spcm->stream[substream->stream].suspend_ignored) {
/*
* This case will be triggered when INFO_RESUME is
* not supported, no need to re-start streams that
* remained enabled in D0ix.
*/
spcm->stream[substream->stream].suspend_ignored = false;
return 0;
}
break;
case SNDRV_PCM_TRIGGER_SUSPEND:
if (sdev->system_suspend_target == SOF_SUSPEND_S0IX &&
spcm->stream[substream->stream].d0i3_compatible) {
/*
* trap the event, not sending trigger stop to
* prevent the FW pipelines from being stopped,
* and mark the flag to ignore the upcoming DAPM
* PM events.
*/
spcm->stream[substream->stream].suspend_ignored = true;
return 0;
}
fallthrough;
case SNDRV_PCM_TRIGGER_STOP:
ipc_first = true;
reset_hw_params = true;
break;
default:
dev_err(component->dev, "Unhandled trigger cmd %d\n", cmd);
return -EINVAL;
}
/*
* DMA and IPC sequence is different for start and stop. Need to send
* STOP IPC before stop DMA
*/
if (!ipc_first)
snd_sof_pcm_platform_trigger(sdev, substream, cmd);
if (pcm_ops && pcm_ops->trigger)
ret = pcm_ops->trigger(component, substream, cmd);
/* need to STOP DMA even if trigger IPC failed */
if (ipc_first)
snd_sof_pcm_platform_trigger(sdev, substream, cmd);
/* free PCM if reset_hw_params is set and the STOP IPC is successful */
if (!ret && reset_hw_params)
ret = sof_pcm_stream_free(sdev, substream, spcm, substream->stream, false);
return ret;
}
static snd_pcm_uframes_t sof_pcm_pointer(struct snd_soc_component *component,
struct snd_pcm_substream *substream)
{
struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
struct snd_sof_dev *sdev = snd_soc_component_get_drvdata(component);
struct snd_sof_pcm *spcm;
snd_pcm_uframes_t host, dai;
/* nothing to do for BE */
if (rtd->dai_link->no_pcm)
return 0;
/* use dsp ops pointer callback directly if set */
if (sof_ops(sdev)->pcm_pointer)
return sof_ops(sdev)->pcm_pointer(sdev, substream);
spcm = snd_sof_find_spcm_dai(component, rtd);
if (!spcm)
return -EINVAL;
/* read position from DSP */
host = bytes_to_frames(substream->runtime,
spcm->stream[substream->stream].posn.host_posn);
dai = bytes_to_frames(substream->runtime,
spcm->stream[substream->stream].posn.dai_posn);
trace_sof_pcm_pointer_position(sdev, spcm, substream, host, dai);
return host;
}
static int sof_pcm_open(struct snd_soc_component *component,
struct snd_pcm_substream *substream)
{
struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
struct snd_pcm_runtime *runtime = substream->runtime;
struct snd_sof_dev *sdev = snd_soc_component_get_drvdata(component);
struct snd_sof_dsp_ops *ops = sof_ops(sdev);
struct snd_sof_pcm *spcm;
struct snd_soc_tplg_stream_caps *caps;
int ret;
/* nothing to do for BE */
if (rtd->dai_link->no_pcm)
return 0;
spcm = snd_sof_find_spcm_dai(component, rtd);
if (!spcm)
return -EINVAL;
dev_dbg(component->dev, "pcm: open stream %d dir %d\n",
spcm->pcm.pcm_id, substream->stream);
caps = &spcm->pcm.caps[substream->stream];
/* set runtime config */
runtime->hw.info = ops->hw_info; /* platform-specific */
/* set any runtime constraints based on topology */
runtime->hw.formats = le64_to_cpu(caps->formats);
runtime->hw.period_bytes_min = le32_to_cpu(caps->period_size_min);
runtime->hw.period_bytes_max = le32_to_cpu(caps->period_size_max);
runtime->hw.periods_min = le32_to_cpu(caps->periods_min);
runtime->hw.periods_max = le32_to_cpu(caps->periods_max);
/*
* caps->buffer_size_min is not used since the
* snd_pcm_hardware structure only defines buffer_bytes_max
*/
runtime->hw.buffer_bytes_max = le32_to_cpu(caps->buffer_size_max);
dev_dbg(component->dev, "period min %zd max %zd bytes\n",
runtime->hw.period_bytes_min,
runtime->hw.period_bytes_max);
dev_dbg(component->dev, "period count %d max %d\n",
runtime->hw.periods_min,
runtime->hw.periods_max);
dev_dbg(component->dev, "buffer max %zd bytes\n",
runtime->hw.buffer_bytes_max);
/* set wait time - TODO: come from topology */
substream->wait_time = 500;
spcm->stream[substream->stream].posn.host_posn = 0;
spcm->stream[substream->stream].posn.dai_posn = 0;
spcm->stream[substream->stream].substream = substream;
spcm->prepared[substream->stream] = false;
ret = snd_sof_pcm_platform_open(sdev, substream);
if (ret < 0)
dev_err(component->dev, "error: pcm open failed %d\n", ret);
return ret;
}
static int sof_pcm_close(struct snd_soc_component *component,
struct snd_pcm_substream *substream)
{
struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
struct snd_sof_dev *sdev = snd_soc_component_get_drvdata(component);
struct snd_sof_pcm *spcm;
int err;
/* nothing to do for BE */
if (rtd->dai_link->no_pcm)
return 0;
spcm = snd_sof_find_spcm_dai(component, rtd);
if (!spcm)
return -EINVAL;
dev_dbg(component->dev, "pcm: close stream %d dir %d\n",
spcm->pcm.pcm_id, substream->stream);
err = snd_sof_pcm_platform_close(sdev, substream);
if (err < 0) {
dev_err(component->dev, "error: pcm close failed %d\n",
err);
/*
* keep going, no point in preventing the close
* from happening
*/
}
return 0;
}
/*
* Pre-allocate playback/capture audio buffer pages.
* no need to explicitly release memory preallocated by sof_pcm_new in pcm_free
* snd_pcm_lib_preallocate_free_for_all() is called by the core.
*/
static int sof_pcm_new(struct snd_soc_component *component,
struct snd_soc_pcm_runtime *rtd)
{
struct snd_sof_dev *sdev = snd_soc_component_get_drvdata(component);
struct snd_sof_pcm *spcm;
struct snd_pcm *pcm = rtd->pcm;
struct snd_soc_tplg_stream_caps *caps;
int stream = SNDRV_PCM_STREAM_PLAYBACK;
/* find SOF PCM for this RTD */
spcm = snd_sof_find_spcm_dai(component, rtd);
if (!spcm) {
dev_warn(component->dev, "warn: can't find PCM with DAI ID %d\n",
rtd->dai_link->id);
return 0;
}
dev_dbg(component->dev, "creating new PCM %s\n", spcm->pcm.pcm_name);
/* do we need to pre-allocate playback audio buffer pages */
if (!spcm->pcm.playback)
goto capture;
caps = &spcm->pcm.caps[stream];
/* pre-allocate playback audio buffer pages */
dev_dbg(component->dev,
"spcm: allocate %s playback DMA buffer size 0x%x max 0x%x\n",
caps->name, caps->buffer_size_min, caps->buffer_size_max);
if (!pcm->streams[stream].substream) {
dev_err(component->dev, "error: NULL playback substream!\n");
return -EINVAL;
}
snd_pcm_set_managed_buffer(pcm->streams[stream].substream,
SNDRV_DMA_TYPE_DEV_SG, sdev->dev,
0, le32_to_cpu(caps->buffer_size_max));
capture:
stream = SNDRV_PCM_STREAM_CAPTURE;
/* do we need to pre-allocate capture audio buffer pages */
if (!spcm->pcm.capture)
return 0;
caps = &spcm->pcm.caps[stream];
/* pre-allocate capture audio buffer pages */
dev_dbg(component->dev,
"spcm: allocate %s capture DMA buffer size 0x%x max 0x%x\n",
caps->name, caps->buffer_size_min, caps->buffer_size_max);
if (!pcm->streams[stream].substream) {
dev_err(component->dev, "error: NULL capture substream!\n");
return -EINVAL;
}
snd_pcm_set_managed_buffer(pcm->streams[stream].substream,
SNDRV_DMA_TYPE_DEV_SG, sdev->dev,
0, le32_to_cpu(caps->buffer_size_max));
return 0;
}
/* fixup the BE DAI link to match any values from topology */
int sof_pcm_dai_link_fixup(struct snd_soc_pcm_runtime *rtd, struct snd_pcm_hw_params *params)
{
struct snd_interval *rate = hw_param_interval(params,
SNDRV_PCM_HW_PARAM_RATE);
struct snd_interval *channels = hw_param_interval(params,
SNDRV_PCM_HW_PARAM_CHANNELS);
struct snd_mask *fmt = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT);
struct snd_soc_component *component =
snd_soc_rtdcom_lookup(rtd, SOF_AUDIO_PCM_DRV_NAME);
struct snd_sof_dai *dai =
snd_sof_find_dai(component, (char *)rtd->dai_link->name);
struct snd_sof_dev *sdev = snd_soc_component_get_drvdata(component);
const struct sof_ipc_pcm_ops *pcm_ops = sof_ipc_get_ops(sdev, pcm);
/* no topology exists for this BE, try a common configuration */
if (!dai) {
dev_warn(component->dev,
"warning: no topology found for BE DAI %s config\n",
rtd->dai_link->name);
/* set 48k, stereo, 16bits by default */
rate->min = 48000;
rate->max = 48000;
channels->min = 2;
channels->max = 2;
snd_mask_none(fmt);
snd_mask_set_format(fmt, SNDRV_PCM_FORMAT_S16_LE);
return 0;
}
if (pcm_ops && pcm_ops->dai_link_fixup)
return pcm_ops->dai_link_fixup(rtd, params);
return 0;
}
EXPORT_SYMBOL(sof_pcm_dai_link_fixup);
static int sof_pcm_probe(struct snd_soc_component *component)
{
struct snd_sof_dev *sdev = snd_soc_component_get_drvdata(component);
struct snd_sof_pdata *plat_data = sdev->pdata;
const char *tplg_filename;
int ret;
/*
* make sure the device is pm_runtime_active before loading the
* topology and initiating IPC or bus transactions
*/
ret = pm_runtime_resume_and_get(component->dev);
if (ret < 0 && ret != -EACCES)
return ret;
/* load the default topology */
sdev->component = component;
tplg_filename = devm_kasprintf(sdev->dev, GFP_KERNEL,
"%s/%s",
plat_data->tplg_filename_prefix,
plat_data->tplg_filename);
if (!tplg_filename)
return -ENOMEM;
ret = snd_sof_load_topology(component, tplg_filename);
if (ret < 0) {
dev_err(component->dev, "error: failed to load DSP topology %d\n",
ret);
return ret;
}
pm_runtime_mark_last_busy(component->dev);
pm_runtime_put_autosuspend(component->dev);
return ret;
}
static void sof_pcm_remove(struct snd_soc_component *component)
{
/* remove topology */
snd_soc_tplg_component_remove(component);
}
static int sof_pcm_ack(struct snd_soc_component *component,
struct snd_pcm_substream *substream)
{
struct snd_sof_dev *sdev = snd_soc_component_get_drvdata(component);
return snd_sof_pcm_platform_ack(sdev, substream);
}
void snd_sof_new_platform_drv(struct snd_sof_dev *sdev)
{
struct snd_soc_component_driver *pd = &sdev->plat_drv;
struct snd_sof_pdata *plat_data = sdev->pdata;
const char *drv_name;
if (plat_data->machine)
drv_name = plat_data->machine->drv_name;
else if (plat_data->of_machine)
drv_name = plat_data->of_machine->drv_name;
else
drv_name = NULL;
pd->name = "sof-audio-component";
pd->probe = sof_pcm_probe;
pd->remove = sof_pcm_remove;
pd->open = sof_pcm_open;
pd->close = sof_pcm_close;
pd->hw_params = sof_pcm_hw_params;
pd->prepare = sof_pcm_prepare;
pd->hw_free = sof_pcm_hw_free;
pd->trigger = sof_pcm_trigger;
pd->pointer = sof_pcm_pointer;
pd->ack = sof_pcm_ack;
#if IS_ENABLED(CONFIG_SND_SOC_SOF_COMPRESS)
pd->compress_ops = &sof_compressed_ops;
#endif
pd->pcm_construct = sof_pcm_new;
pd->ignore_machine = drv_name;
pd->be_hw_params_fixup = sof_pcm_dai_link_fixup;
pd->be_pcm_base = SOF_BE_PCM_BASE;
pd->use_dai_pcm_id = true;
pd->topology_name_prefix = "sof";
/* increment module refcount when a pcm is opened */
pd->module_get_upon_open = 1;
pd->legacy_dai_naming = 1;
}
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