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WSL2-Linux-Kernel/sound/soc/sof/pcm.c

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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);
if (spcm->prepared[substream->stream]) {
/* stop DMA first if needed */
if (pcm_ops && pcm_ops->platform_stop_during_hw_free)
snd_sof_pcm_platform_trigger(sdev, substream, SNDRV_PCM_TRIGGER_STOP);
/* free PCM in the DSP */
if (pcm_ops && pcm_ops->hw_free) {
ret = pcm_ops->hw_free(component, substream);
if (ret < 0)
err = ret;
}
spcm->prepared[substream->stream] = false;
}
/* reset 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:
if (pcm_ops && pcm_ops->ipc_first_on_start)
ipc_first = true;
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;
}
if (pcm_ops && pcm_ops->ipc_first_on_start)
ipc_first = true;
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;
}
/* On suspend the DMA must be stopped in DSPless mode */
if (sdev->dspless_mode_selected)
reset_hw_params = true;
fallthrough;
case SNDRV_PCM_TRIGGER_STOP:
ipc_first = true;
if (pcm_ops && pcm_ops->reset_hw_params_during_stop)
reset_hw_params = true;
break;
default:
dev_err(component->dev, "Unhandled trigger cmd %d\n", cmd);
return -EINVAL;
}
if (!ipc_first)
snd_sof_pcm_platform_trigger(sdev, substream, cmd);
if (pcm_ops && pcm_ops->trigger)
ret = pcm_ops->trigger(component, substream, cmd);
switch (cmd) {
case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
case SNDRV_PCM_TRIGGER_START:
/* invoke platform trigger to start DMA only if pcm_ops is successful */
if (ipc_first && !ret)
snd_sof_pcm_platform_trigger(sdev, substream, cmd);
break;
case SNDRV_PCM_TRIGGER_SUSPEND:
case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
case SNDRV_PCM_TRIGGER_STOP:
/* invoke platform trigger to stop DMA even if pcm_ops isn't set or if it failed */
if (!pcm_ops || !pcm_ops->platform_stop_during_hw_free)
snd_sof_pcm_platform_trigger(sdev, substream, cmd);
break;
default:
break;
}
/* 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) {
ret = -ENOMEM;
goto pm_error;
}
ret = snd_sof_load_topology(component, tplg_filename);
if (ret < 0)
dev_err(component->dev, "error: failed to load DSP topology %d\n",
ret);
pm_error:
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);
}
static snd_pcm_sframes_t sof_pcm_delay(struct snd_soc_component *component,
struct snd_pcm_substream *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);
if (pcm_ops && pcm_ops->delay)
return pcm_ops->delay(component, substream);
return 0;
}
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;
pd->delay = sof_pcm_delay;
#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_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;
/*
* The fixup is only needed when the DSP is in use as with the DSPless
* mode we are directly using the audio interface
*/
if (!sdev->dspless_mode_selected)
pd->be_hw_params_fixup = sof_pcm_dai_link_fixup;
}
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