| /* |
| * soc-pcm.c -- ALSA SoC PCM |
| * |
| * Copyright 2005 Wolfson Microelectronics PLC. |
| * Copyright 2005 Openedhand Ltd. |
| * Copyright (C) 2010 Slimlogic Ltd. |
| * Copyright (C) 2010 Texas Instruments Inc. |
| * |
| * Authors: Liam Girdwood <lrg@ti.com> |
| * Mark Brown <broonie@opensource.wolfsonmicro.com> |
| * |
| * This program is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License as published by the |
| * Free Software Foundation; either version 2 of the License, or (at your |
| * option) any later version. |
| * |
| */ |
| |
| #include <linux/kernel.h> |
| #include <linux/init.h> |
| #include <linux/delay.h> |
| #include <linux/pinctrl/consumer.h> |
| #include <linux/pm_runtime.h> |
| #include <linux/slab.h> |
| #include <linux/workqueue.h> |
| #include <linux/export.h> |
| #include <linux/debugfs.h> |
| #include <sound/core.h> |
| #include <sound/pcm.h> |
| #include <sound/pcm_params.h> |
| #include <sound/soc.h> |
| #include <sound/soc-dpcm.h> |
| #include <sound/initval.h> |
| |
| #define DPCM_MAX_BE_USERS 8 |
| |
| /** |
| * snd_soc_runtime_activate() - Increment active count for PCM runtime components |
| * @rtd: ASoC PCM runtime that is activated |
| * @stream: Direction of the PCM stream |
| * |
| * Increments the active count for all the DAIs and components attached to a PCM |
| * runtime. Should typically be called when a stream is opened. |
| * |
| * Must be called with the rtd->pcm_mutex being held |
| */ |
| void snd_soc_runtime_activate(struct snd_soc_pcm_runtime *rtd, int stream) |
| { |
| struct snd_soc_dai *cpu_dai = rtd->cpu_dai; |
| struct snd_soc_dai *codec_dai = rtd->codec_dai; |
| |
| lockdep_assert_held(&rtd->pcm_mutex); |
| |
| if (stream == SNDRV_PCM_STREAM_PLAYBACK) { |
| cpu_dai->playback_active++; |
| codec_dai->playback_active++; |
| } else { |
| cpu_dai->capture_active++; |
| codec_dai->capture_active++; |
| } |
| |
| cpu_dai->active++; |
| codec_dai->active++; |
| if (cpu_dai->codec) |
| cpu_dai->codec->active++; |
| codec_dai->codec->active++; |
| } |
| |
| /** |
| * snd_soc_runtime_deactivate() - Decrement active count for PCM runtime components |
| * @rtd: ASoC PCM runtime that is deactivated |
| * @stream: Direction of the PCM stream |
| * |
| * Decrements the active count for all the DAIs and components attached to a PCM |
| * runtime. Should typically be called when a stream is closed. |
| * |
| * Must be called with the rtd->pcm_mutex being held |
| */ |
| void snd_soc_runtime_deactivate(struct snd_soc_pcm_runtime *rtd, int stream) |
| { |
| struct snd_soc_dai *cpu_dai = rtd->cpu_dai; |
| struct snd_soc_dai *codec_dai = rtd->codec_dai; |
| |
| lockdep_assert_held(&rtd->pcm_mutex); |
| |
| if (stream == SNDRV_PCM_STREAM_PLAYBACK) { |
| cpu_dai->playback_active--; |
| codec_dai->playback_active--; |
| } else { |
| cpu_dai->capture_active--; |
| codec_dai->capture_active--; |
| } |
| |
| cpu_dai->active--; |
| codec_dai->active--; |
| if (cpu_dai->codec) |
| cpu_dai->codec->active--; |
| codec_dai->codec->active--; |
| } |
| |
| /** |
| * snd_soc_runtime_ignore_pmdown_time() - Check whether to ignore the power down delay |
| * @rtd: The ASoC PCM runtime that should be checked. |
| * |
| * This function checks whether the power down delay should be ignored for a |
| * specific PCM runtime. Returns true if the delay is 0, if it the DAI link has |
| * been configured to ignore the delay, or if none of the components benefits |
| * from having the delay. |
| */ |
| bool snd_soc_runtime_ignore_pmdown_time(struct snd_soc_pcm_runtime *rtd) |
| { |
| bool ignore = true; |
| |
| if (!rtd->pmdown_time || rtd->dai_link->ignore_pmdown_time) |
| return true; |
| |
| if (rtd->cpu_dai->codec) |
| ignore &= rtd->cpu_dai->codec->ignore_pmdown_time; |
| |
| ignore &= rtd->codec_dai->codec->ignore_pmdown_time; |
| |
| return ignore; |
| } |
| |
| /** |
| * snd_soc_set_runtime_hwparams - set the runtime hardware parameters |
| * @substream: the pcm substream |
| * @hw: the hardware parameters |
| * |
| * Sets the substream runtime hardware parameters. |
| */ |
| int snd_soc_set_runtime_hwparams(struct snd_pcm_substream *substream, |
| const struct snd_pcm_hardware *hw) |
| { |
| struct snd_pcm_runtime *runtime = substream->runtime; |
| runtime->hw.info = hw->info; |
| runtime->hw.formats = hw->formats; |
| runtime->hw.period_bytes_min = hw->period_bytes_min; |
| runtime->hw.period_bytes_max = hw->period_bytes_max; |
| runtime->hw.periods_min = hw->periods_min; |
| runtime->hw.periods_max = hw->periods_max; |
| runtime->hw.buffer_bytes_max = hw->buffer_bytes_max; |
| runtime->hw.fifo_size = hw->fifo_size; |
| return 0; |
| } |
| EXPORT_SYMBOL_GPL(snd_soc_set_runtime_hwparams); |
| |
| /* DPCM stream event, send event to FE and all active BEs. */ |
| int dpcm_dapm_stream_event(struct snd_soc_pcm_runtime *fe, int dir, |
| int event) |
| { |
| struct snd_soc_dpcm *dpcm; |
| |
| list_for_each_entry(dpcm, &fe->dpcm[dir].be_clients, list_be) { |
| |
| struct snd_soc_pcm_runtime *be = dpcm->be; |
| |
| dev_dbg(be->dev, "ASoC: BE %s event %d dir %d\n", |
| be->dai_link->name, event, dir); |
| |
| snd_soc_dapm_stream_event(be, dir, event); |
| } |
| |
| snd_soc_dapm_stream_event(fe, dir, event); |
| |
| return 0; |
| } |
| |
| static int soc_pcm_apply_symmetry(struct snd_pcm_substream *substream, |
| struct snd_soc_dai *soc_dai) |
| { |
| struct snd_soc_pcm_runtime *rtd = substream->private_data; |
| int ret; |
| |
| if (soc_dai->rate && (soc_dai->driver->symmetric_rates || |
| rtd->dai_link->symmetric_rates)) { |
| dev_dbg(soc_dai->dev, "ASoC: Symmetry forces %dHz rate\n", |
| soc_dai->rate); |
| |
| ret = snd_pcm_hw_constraint_minmax(substream->runtime, |
| SNDRV_PCM_HW_PARAM_RATE, |
| soc_dai->rate, soc_dai->rate); |
| if (ret < 0) { |
| dev_err(soc_dai->dev, |
| "ASoC: Unable to apply rate constraint: %d\n", |
| ret); |
| return ret; |
| } |
| } |
| |
| if (soc_dai->channels && (soc_dai->driver->symmetric_channels || |
| rtd->dai_link->symmetric_channels)) { |
| dev_dbg(soc_dai->dev, "ASoC: Symmetry forces %d channel(s)\n", |
| soc_dai->channels); |
| |
| ret = snd_pcm_hw_constraint_minmax(substream->runtime, |
| SNDRV_PCM_HW_PARAM_CHANNELS, |
| soc_dai->channels, |
| soc_dai->channels); |
| if (ret < 0) { |
| dev_err(soc_dai->dev, |
| "ASoC: Unable to apply channel symmetry constraint: %d\n", |
| ret); |
| return ret; |
| } |
| } |
| |
| if (soc_dai->sample_bits && (soc_dai->driver->symmetric_samplebits || |
| rtd->dai_link->symmetric_samplebits)) { |
| dev_dbg(soc_dai->dev, "ASoC: Symmetry forces %d sample bits\n", |
| soc_dai->sample_bits); |
| |
| ret = snd_pcm_hw_constraint_minmax(substream->runtime, |
| SNDRV_PCM_HW_PARAM_SAMPLE_BITS, |
| soc_dai->sample_bits, |
| soc_dai->sample_bits); |
| if (ret < 0) { |
| dev_err(soc_dai->dev, |
| "ASoC: Unable to apply sample bits symmetry constraint: %d\n", |
| ret); |
| return ret; |
| } |
| } |
| |
| return 0; |
| } |
| |
| static int soc_pcm_params_symmetry(struct snd_pcm_substream *substream, |
| struct snd_pcm_hw_params *params) |
| { |
| struct snd_soc_pcm_runtime *rtd = substream->private_data; |
| struct snd_soc_dai *cpu_dai = rtd->cpu_dai; |
| struct snd_soc_dai *codec_dai = rtd->codec_dai; |
| unsigned int rate, channels, sample_bits, symmetry; |
| |
| rate = params_rate(params); |
| channels = params_channels(params); |
| sample_bits = snd_pcm_format_physical_width(params_format(params)); |
| |
| /* reject unmatched parameters when applying symmetry */ |
| symmetry = cpu_dai->driver->symmetric_rates || |
| codec_dai->driver->symmetric_rates || |
| rtd->dai_link->symmetric_rates; |
| if (symmetry && cpu_dai->rate && cpu_dai->rate != rate) { |
| dev_err(rtd->dev, "ASoC: unmatched rate symmetry: %d - %d\n", |
| cpu_dai->rate, rate); |
| return -EINVAL; |
| } |
| |
| symmetry = cpu_dai->driver->symmetric_channels || |
| codec_dai->driver->symmetric_channels || |
| rtd->dai_link->symmetric_channels; |
| if (symmetry && cpu_dai->channels && cpu_dai->channels != channels) { |
| dev_err(rtd->dev, "ASoC: unmatched channel symmetry: %d - %d\n", |
| cpu_dai->channels, channels); |
| return -EINVAL; |
| } |
| |
| symmetry = cpu_dai->driver->symmetric_samplebits || |
| codec_dai->driver->symmetric_samplebits || |
| rtd->dai_link->symmetric_samplebits; |
| if (symmetry && cpu_dai->sample_bits && cpu_dai->sample_bits != sample_bits) { |
| dev_err(rtd->dev, "ASoC: unmatched sample bits symmetry: %d - %d\n", |
| cpu_dai->sample_bits, sample_bits); |
| return -EINVAL; |
| } |
| |
| return 0; |
| } |
| |
| static bool soc_pcm_has_symmetry(struct snd_pcm_substream *substream) |
| { |
| struct snd_soc_pcm_runtime *rtd = substream->private_data; |
| struct snd_soc_dai_driver *cpu_driver = rtd->cpu_dai->driver; |
| struct snd_soc_dai_driver *codec_driver = rtd->codec_dai->driver; |
| struct snd_soc_dai_link *link = rtd->dai_link; |
| |
| return cpu_driver->symmetric_rates || codec_driver->symmetric_rates || |
| link->symmetric_rates || cpu_driver->symmetric_channels || |
| codec_driver->symmetric_channels || link->symmetric_channels || |
| cpu_driver->symmetric_samplebits || |
| codec_driver->symmetric_samplebits || |
| link->symmetric_samplebits; |
| } |
| |
| /* |
| * List of sample sizes that might go over the bus for parameter |
| * application. There ought to be a wildcard sample size for things |
| * like the DAC/ADC resolution to use but there isn't right now. |
| */ |
| static int sample_sizes[] = { |
| 24, 32, |
| }; |
| |
| static void soc_pcm_apply_msb(struct snd_pcm_substream *substream, |
| struct snd_soc_dai *dai) |
| { |
| int ret, i, bits; |
| |
| if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) |
| bits = dai->driver->playback.sig_bits; |
| else |
| bits = dai->driver->capture.sig_bits; |
| |
| if (!bits) |
| return; |
| |
| for (i = 0; i < ARRAY_SIZE(sample_sizes); i++) { |
| if (bits >= sample_sizes[i]) |
| continue; |
| |
| ret = snd_pcm_hw_constraint_msbits(substream->runtime, 0, |
| sample_sizes[i], bits); |
| if (ret != 0) |
| dev_warn(dai->dev, |
| "ASoC: Failed to set MSB %d/%d: %d\n", |
| bits, sample_sizes[i], ret); |
| } |
| } |
| |
| static void soc_pcm_init_runtime_hw(struct snd_pcm_runtime *runtime, |
| struct snd_soc_pcm_stream *codec_stream, |
| struct snd_soc_pcm_stream *cpu_stream) |
| { |
| struct snd_pcm_hardware *hw = &runtime->hw; |
| |
| hw->channels_min = max(codec_stream->channels_min, |
| cpu_stream->channels_min); |
| hw->channels_max = min(codec_stream->channels_max, |
| cpu_stream->channels_max); |
| if (hw->formats) |
| hw->formats &= codec_stream->formats & cpu_stream->formats; |
| else |
| hw->formats = codec_stream->formats & cpu_stream->formats; |
| hw->rates = snd_pcm_rate_mask_intersect(codec_stream->rates, |
| cpu_stream->rates); |
| |
| hw->rate_min = 0; |
| hw->rate_max = UINT_MAX; |
| |
| snd_pcm_limit_hw_rates(runtime); |
| |
| hw->rate_min = max(hw->rate_min, cpu_stream->rate_min); |
| hw->rate_min = max(hw->rate_min, codec_stream->rate_min); |
| hw->rate_max = min_not_zero(hw->rate_max, cpu_stream->rate_max); |
| hw->rate_max = min_not_zero(hw->rate_max, codec_stream->rate_max); |
| } |
| |
| /* |
| * Called by ALSA when a PCM substream is opened, the runtime->hw record is |
| * then initialized and any private data can be allocated. This also calls |
| * startup for the cpu DAI, platform, machine and codec DAI. |
| */ |
| static int soc_pcm_open(struct snd_pcm_substream *substream) |
| { |
| struct snd_soc_pcm_runtime *rtd = substream->private_data; |
| struct snd_pcm_runtime *runtime = substream->runtime; |
| struct snd_soc_platform *platform = rtd->platform; |
| struct snd_soc_dai *cpu_dai = rtd->cpu_dai; |
| struct snd_soc_dai *codec_dai = rtd->codec_dai; |
| struct snd_soc_dai_driver *cpu_dai_drv = cpu_dai->driver; |
| struct snd_soc_dai_driver *codec_dai_drv = codec_dai->driver; |
| int ret = 0; |
| |
| pinctrl_pm_select_default_state(cpu_dai->dev); |
| pinctrl_pm_select_default_state(codec_dai->dev); |
| pm_runtime_get_sync(cpu_dai->dev); |
| pm_runtime_get_sync(codec_dai->dev); |
| pm_runtime_get_sync(platform->dev); |
| |
| mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass); |
| |
| /* startup the audio subsystem */ |
| if (cpu_dai->driver->ops && cpu_dai->driver->ops->startup) { |
| ret = cpu_dai->driver->ops->startup(substream, cpu_dai); |
| if (ret < 0) { |
| dev_err(cpu_dai->dev, "ASoC: can't open interface" |
| " %s: %d\n", cpu_dai->name, ret); |
| goto out; |
| } |
| } |
| |
| if (platform->driver->ops && platform->driver->ops->open) { |
| ret = platform->driver->ops->open(substream); |
| if (ret < 0) { |
| dev_err(platform->dev, "ASoC: can't open platform" |
| " %s: %d\n", platform->name, ret); |
| goto platform_err; |
| } |
| } |
| |
| if (codec_dai->driver->ops && codec_dai->driver->ops->startup) { |
| ret = codec_dai->driver->ops->startup(substream, codec_dai); |
| if (ret < 0) { |
| dev_err(codec_dai->dev, "ASoC: can't open codec" |
| " %s: %d\n", codec_dai->name, ret); |
| goto codec_dai_err; |
| } |
| } |
| |
| if (rtd->dai_link->ops && rtd->dai_link->ops->startup) { |
| ret = rtd->dai_link->ops->startup(substream); |
| if (ret < 0) { |
| pr_err("ASoC: %s startup failed: %d\n", |
| rtd->dai_link->name, ret); |
| goto machine_err; |
| } |
| } |
| |
| /* Dynamic PCM DAI links compat checks use dynamic capabilities */ |
| if (rtd->dai_link->dynamic || rtd->dai_link->no_pcm) |
| goto dynamic; |
| |
| /* Check that the codec and cpu DAIs are compatible */ |
| if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { |
| soc_pcm_init_runtime_hw(runtime, &codec_dai_drv->playback, |
| &cpu_dai_drv->playback); |
| } else { |
| soc_pcm_init_runtime_hw(runtime, &codec_dai_drv->capture, |
| &cpu_dai_drv->capture); |
| } |
| |
| if (soc_pcm_has_symmetry(substream)) |
| runtime->hw.info |= SNDRV_PCM_INFO_JOINT_DUPLEX; |
| |
| ret = -EINVAL; |
| if (!runtime->hw.rates) { |
| printk(KERN_ERR "ASoC: %s <-> %s No matching rates\n", |
| codec_dai->name, cpu_dai->name); |
| goto config_err; |
| } |
| if (!runtime->hw.formats) { |
| printk(KERN_ERR "ASoC: %s <-> %s No matching formats\n", |
| codec_dai->name, cpu_dai->name); |
| goto config_err; |
| } |
| if (!runtime->hw.channels_min || !runtime->hw.channels_max || |
| runtime->hw.channels_min > runtime->hw.channels_max) { |
| printk(KERN_ERR "ASoC: %s <-> %s No matching channels\n", |
| codec_dai->name, cpu_dai->name); |
| goto config_err; |
| } |
| |
| soc_pcm_apply_msb(substream, codec_dai); |
| soc_pcm_apply_msb(substream, cpu_dai); |
| |
| /* Symmetry only applies if we've already got an active stream. */ |
| if (cpu_dai->active) { |
| ret = soc_pcm_apply_symmetry(substream, cpu_dai); |
| if (ret != 0) |
| goto config_err; |
| } |
| |
| if (codec_dai->active) { |
| ret = soc_pcm_apply_symmetry(substream, codec_dai); |
| if (ret != 0) |
| goto config_err; |
| } |
| |
| pr_debug("ASoC: %s <-> %s info:\n", |
| codec_dai->name, cpu_dai->name); |
| pr_debug("ASoC: rate mask 0x%x\n", runtime->hw.rates); |
| pr_debug("ASoC: min ch %d max ch %d\n", runtime->hw.channels_min, |
| runtime->hw.channels_max); |
| pr_debug("ASoC: min rate %d max rate %d\n", runtime->hw.rate_min, |
| runtime->hw.rate_max); |
| |
| dynamic: |
| |
| snd_soc_runtime_activate(rtd, substream->stream); |
| |
| mutex_unlock(&rtd->pcm_mutex); |
| return 0; |
| |
| config_err: |
| if (rtd->dai_link->ops && rtd->dai_link->ops->shutdown) |
| rtd->dai_link->ops->shutdown(substream); |
| |
| machine_err: |
| if (codec_dai->driver->ops->shutdown) |
| codec_dai->driver->ops->shutdown(substream, codec_dai); |
| |
| codec_dai_err: |
| if (platform->driver->ops && platform->driver->ops->close) |
| platform->driver->ops->close(substream); |
| |
| platform_err: |
| if (cpu_dai->driver->ops->shutdown) |
| cpu_dai->driver->ops->shutdown(substream, cpu_dai); |
| out: |
| mutex_unlock(&rtd->pcm_mutex); |
| |
| pm_runtime_put(platform->dev); |
| pm_runtime_put(codec_dai->dev); |
| pm_runtime_put(cpu_dai->dev); |
| if (!codec_dai->active) |
| pinctrl_pm_select_sleep_state(codec_dai->dev); |
| if (!cpu_dai->active) |
| pinctrl_pm_select_sleep_state(cpu_dai->dev); |
| |
| return ret; |
| } |
| |
| /* |
| * Power down the audio subsystem pmdown_time msecs after close is called. |
| * This is to ensure there are no pops or clicks in between any music tracks |
| * due to DAPM power cycling. |
| */ |
| static void close_delayed_work(struct work_struct *work) |
| { |
| struct snd_soc_pcm_runtime *rtd = |
| container_of(work, struct snd_soc_pcm_runtime, delayed_work.work); |
| struct snd_soc_dai *codec_dai = rtd->codec_dai; |
| |
| mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass); |
| |
| dev_dbg(rtd->dev, "ASoC: pop wq checking: %s status: %s waiting: %s\n", |
| codec_dai->driver->playback.stream_name, |
| codec_dai->playback_active ? "active" : "inactive", |
| rtd->pop_wait ? "yes" : "no"); |
| |
| /* are we waiting on this codec DAI stream */ |
| if (rtd->pop_wait == 1) { |
| rtd->pop_wait = 0; |
| snd_soc_dapm_stream_event(rtd, SNDRV_PCM_STREAM_PLAYBACK, |
| SND_SOC_DAPM_STREAM_STOP); |
| } |
| |
| mutex_unlock(&rtd->pcm_mutex); |
| } |
| |
| /* |
| * Called by ALSA when a PCM substream is closed. Private data can be |
| * freed here. The cpu DAI, codec DAI, machine and platform are also |
| * shutdown. |
| */ |
| static int soc_pcm_close(struct snd_pcm_substream *substream) |
| { |
| struct snd_soc_pcm_runtime *rtd = substream->private_data; |
| struct snd_soc_platform *platform = rtd->platform; |
| struct snd_soc_dai *cpu_dai = rtd->cpu_dai; |
| struct snd_soc_dai *codec_dai = rtd->codec_dai; |
| |
| mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass); |
| |
| snd_soc_runtime_deactivate(rtd, substream->stream); |
| |
| /* clear the corresponding DAIs rate when inactive */ |
| if (!cpu_dai->active) |
| cpu_dai->rate = 0; |
| |
| if (!codec_dai->active) |
| codec_dai->rate = 0; |
| |
| if (cpu_dai->driver->ops->shutdown) |
| cpu_dai->driver->ops->shutdown(substream, cpu_dai); |
| |
| if (codec_dai->driver->ops->shutdown) |
| codec_dai->driver->ops->shutdown(substream, codec_dai); |
| |
| if (rtd->dai_link->ops && rtd->dai_link->ops->shutdown) |
| rtd->dai_link->ops->shutdown(substream); |
| |
| if (platform->driver->ops && platform->driver->ops->close) |
| platform->driver->ops->close(substream); |
| cpu_dai->runtime = NULL; |
| |
| if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { |
| if (snd_soc_runtime_ignore_pmdown_time(rtd)) { |
| /* powered down playback stream now */ |
| snd_soc_dapm_stream_event(rtd, |
| SNDRV_PCM_STREAM_PLAYBACK, |
| SND_SOC_DAPM_STREAM_STOP); |
| } else { |
| /* start delayed pop wq here for playback streams */ |
| rtd->pop_wait = 1; |
| queue_delayed_work(system_power_efficient_wq, |
| &rtd->delayed_work, |
| msecs_to_jiffies(rtd->pmdown_time)); |
| } |
| } else { |
| /* capture streams can be powered down now */ |
| snd_soc_dapm_stream_event(rtd, SNDRV_PCM_STREAM_CAPTURE, |
| SND_SOC_DAPM_STREAM_STOP); |
| } |
| |
| mutex_unlock(&rtd->pcm_mutex); |
| |
| pm_runtime_put(platform->dev); |
| pm_runtime_put(codec_dai->dev); |
| pm_runtime_put(cpu_dai->dev); |
| if (!codec_dai->active) |
| pinctrl_pm_select_sleep_state(codec_dai->dev); |
| if (!cpu_dai->active) |
| pinctrl_pm_select_sleep_state(cpu_dai->dev); |
| |
| return 0; |
| } |
| |
| /* |
| * Called by ALSA when the PCM substream is prepared, can set format, sample |
| * rate, etc. This function is non atomic and can be called multiple times, |
| * it can refer to the runtime info. |
| */ |
| static int soc_pcm_prepare(struct snd_pcm_substream *substream) |
| { |
| struct snd_soc_pcm_runtime *rtd = substream->private_data; |
| struct snd_soc_platform *platform = rtd->platform; |
| struct snd_soc_dai *cpu_dai = rtd->cpu_dai; |
| struct snd_soc_dai *codec_dai = rtd->codec_dai; |
| int ret = 0; |
| |
| mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass); |
| |
| if (rtd->dai_link->ops && rtd->dai_link->ops->prepare) { |
| ret = rtd->dai_link->ops->prepare(substream); |
| if (ret < 0) { |
| dev_err(rtd->card->dev, "ASoC: machine prepare error:" |
| " %d\n", ret); |
| goto out; |
| } |
| } |
| |
| if (platform->driver->ops && platform->driver->ops->prepare) { |
| ret = platform->driver->ops->prepare(substream); |
| if (ret < 0) { |
| dev_err(platform->dev, "ASoC: platform prepare error:" |
| " %d\n", ret); |
| goto out; |
| } |
| } |
| |
| if (codec_dai->driver->ops && codec_dai->driver->ops->prepare) { |
| ret = codec_dai->driver->ops->prepare(substream, codec_dai); |
| if (ret < 0) { |
| dev_err(codec_dai->dev, "ASoC: DAI prepare error: %d\n", |
| ret); |
| goto out; |
| } |
| } |
| |
| if (cpu_dai->driver->ops && cpu_dai->driver->ops->prepare) { |
| ret = cpu_dai->driver->ops->prepare(substream, cpu_dai); |
| if (ret < 0) { |
| dev_err(cpu_dai->dev, "ASoC: DAI prepare error: %d\n", |
| ret); |
| goto out; |
| } |
| } |
| |
| /* cancel any delayed stream shutdown that is pending */ |
| if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK && |
| rtd->pop_wait) { |
| rtd->pop_wait = 0; |
| cancel_delayed_work(&rtd->delayed_work); |
| } |
| |
| snd_soc_dapm_stream_event(rtd, substream->stream, |
| SND_SOC_DAPM_STREAM_START); |
| |
| snd_soc_dai_digital_mute(codec_dai, 0, substream->stream); |
| |
| out: |
| mutex_unlock(&rtd->pcm_mutex); |
| return ret; |
| } |
| |
| /* |
| * Called by ALSA when the hardware params are set by application. This |
| * function can also be called multiple times and can allocate buffers |
| * (using snd_pcm_lib_* ). It's non-atomic. |
| */ |
| static int soc_pcm_hw_params(struct snd_pcm_substream *substream, |
| struct snd_pcm_hw_params *params) |
| { |
| struct snd_soc_pcm_runtime *rtd = substream->private_data; |
| struct snd_soc_platform *platform = rtd->platform; |
| struct snd_soc_dai *cpu_dai = rtd->cpu_dai; |
| struct snd_soc_dai *codec_dai = rtd->codec_dai; |
| int ret = 0; |
| |
| mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass); |
| |
| ret = soc_pcm_params_symmetry(substream, params); |
| if (ret) |
| goto out; |
| |
| if (rtd->dai_link->ops && rtd->dai_link->ops->hw_params) { |
| ret = rtd->dai_link->ops->hw_params(substream, params); |
| if (ret < 0) { |
| dev_err(rtd->card->dev, "ASoC: machine hw_params" |
| " failed: %d\n", ret); |
| goto out; |
| } |
| } |
| |
| if (codec_dai->driver->ops && codec_dai->driver->ops->hw_params) { |
| ret = codec_dai->driver->ops->hw_params(substream, params, codec_dai); |
| if (ret < 0) { |
| dev_err(codec_dai->dev, "ASoC: can't set %s hw params:" |
| " %d\n", codec_dai->name, ret); |
| goto codec_err; |
| } |
| } |
| |
| if (cpu_dai->driver->ops && cpu_dai->driver->ops->hw_params) { |
| ret = cpu_dai->driver->ops->hw_params(substream, params, cpu_dai); |
| if (ret < 0) { |
| dev_err(cpu_dai->dev, "ASoC: %s hw params failed: %d\n", |
| cpu_dai->name, ret); |
| goto interface_err; |
| } |
| } |
| |
| if (platform->driver->ops && platform->driver->ops->hw_params) { |
| ret = platform->driver->ops->hw_params(substream, params); |
| if (ret < 0) { |
| dev_err(platform->dev, "ASoC: %s hw params failed: %d\n", |
| platform->name, ret); |
| goto platform_err; |
| } |
| } |
| |
| /* store the parameters for each DAIs */ |
| cpu_dai->rate = params_rate(params); |
| cpu_dai->channels = params_channels(params); |
| cpu_dai->sample_bits = |
| snd_pcm_format_physical_width(params_format(params)); |
| |
| codec_dai->rate = params_rate(params); |
| codec_dai->channels = params_channels(params); |
| codec_dai->sample_bits = |
| snd_pcm_format_physical_width(params_format(params)); |
| |
| out: |
| mutex_unlock(&rtd->pcm_mutex); |
| return ret; |
| |
| platform_err: |
| if (cpu_dai->driver->ops && cpu_dai->driver->ops->hw_free) |
| cpu_dai->driver->ops->hw_free(substream, cpu_dai); |
| |
| interface_err: |
| if (codec_dai->driver->ops && codec_dai->driver->ops->hw_free) |
| codec_dai->driver->ops->hw_free(substream, codec_dai); |
| |
| codec_err: |
| if (rtd->dai_link->ops && rtd->dai_link->ops->hw_free) |
| rtd->dai_link->ops->hw_free(substream); |
| |
| mutex_unlock(&rtd->pcm_mutex); |
| return ret; |
| } |
| |
| /* |
| * Frees resources allocated by hw_params, can be called multiple times |
| */ |
| static int soc_pcm_hw_free(struct snd_pcm_substream *substream) |
| { |
| struct snd_soc_pcm_runtime *rtd = substream->private_data; |
| struct snd_soc_platform *platform = rtd->platform; |
| struct snd_soc_dai *cpu_dai = rtd->cpu_dai; |
| struct snd_soc_dai *codec_dai = rtd->codec_dai; |
| bool playback = substream->stream == SNDRV_PCM_STREAM_PLAYBACK; |
| |
| mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass); |
| |
| /* clear the corresponding DAIs parameters when going to be inactive */ |
| if (cpu_dai->active == 1) { |
| cpu_dai->rate = 0; |
| cpu_dai->channels = 0; |
| cpu_dai->sample_bits = 0; |
| } |
| |
| if (codec_dai->active == 1) { |
| codec_dai->rate = 0; |
| codec_dai->channels = 0; |
| codec_dai->sample_bits = 0; |
| } |
| |
| /* apply codec digital mute */ |
| if ((playback && codec_dai->playback_active == 1) || |
| (!playback && codec_dai->capture_active == 1)) |
| snd_soc_dai_digital_mute(codec_dai, 1, substream->stream); |
| |
| /* free any machine hw params */ |
| if (rtd->dai_link->ops && rtd->dai_link->ops->hw_free) |
| rtd->dai_link->ops->hw_free(substream); |
| |
| /* free any DMA resources */ |
| if (platform->driver->ops && platform->driver->ops->hw_free) |
| platform->driver->ops->hw_free(substream); |
| |
| /* now free hw params for the DAIs */ |
| if (codec_dai->driver->ops && codec_dai->driver->ops->hw_free) |
| codec_dai->driver->ops->hw_free(substream, codec_dai); |
| |
| if (cpu_dai->driver->ops && cpu_dai->driver->ops->hw_free) |
| cpu_dai->driver->ops->hw_free(substream, cpu_dai); |
| |
| mutex_unlock(&rtd->pcm_mutex); |
| return 0; |
| } |
| |
| static int soc_pcm_trigger(struct snd_pcm_substream *substream, int cmd) |
| { |
| struct snd_soc_pcm_runtime *rtd = substream->private_data; |
| struct snd_soc_platform *platform = rtd->platform; |
| struct snd_soc_dai *cpu_dai = rtd->cpu_dai; |
| struct snd_soc_dai *codec_dai = rtd->codec_dai; |
| int ret; |
| |
| if (codec_dai->driver->ops && codec_dai->driver->ops->trigger) { |
| ret = codec_dai->driver->ops->trigger(substream, cmd, codec_dai); |
| if (ret < 0) |
| return ret; |
| } |
| |
| if (platform->driver->ops && platform->driver->ops->trigger) { |
| ret = platform->driver->ops->trigger(substream, cmd); |
| if (ret < 0) |
| return ret; |
| } |
| |
| if (cpu_dai->driver->ops && cpu_dai->driver->ops->trigger) { |
| ret = cpu_dai->driver->ops->trigger(substream, cmd, cpu_dai); |
| if (ret < 0) |
| return ret; |
| } |
| return 0; |
| } |
| |
| static int soc_pcm_bespoke_trigger(struct snd_pcm_substream *substream, |
| int cmd) |
| { |
| struct snd_soc_pcm_runtime *rtd = substream->private_data; |
| struct snd_soc_platform *platform = rtd->platform; |
| struct snd_soc_dai *cpu_dai = rtd->cpu_dai; |
| struct snd_soc_dai *codec_dai = rtd->codec_dai; |
| int ret; |
| |
| if (codec_dai->driver->ops && |
| codec_dai->driver->ops->bespoke_trigger) { |
| ret = codec_dai->driver->ops->bespoke_trigger(substream, cmd, codec_dai); |
| if (ret < 0) |
| return ret; |
| } |
| |
| if (platform->driver->bespoke_trigger) { |
| ret = platform->driver->bespoke_trigger(substream, cmd); |
| if (ret < 0) |
| return ret; |
| } |
| |
| if (cpu_dai->driver->ops && cpu_dai->driver->ops->bespoke_trigger) { |
| ret = cpu_dai->driver->ops->bespoke_trigger(substream, cmd, cpu_dai); |
| if (ret < 0) |
| return ret; |
| } |
| return 0; |
| } |
| /* |
| * soc level wrapper for pointer callback |
| * If cpu_dai, codec_dai, platform driver has the delay callback, than |
| * the runtime->delay will be updated accordingly. |
| */ |
| static snd_pcm_uframes_t soc_pcm_pointer(struct snd_pcm_substream *substream) |
| { |
| struct snd_soc_pcm_runtime *rtd = substream->private_data; |
| struct snd_soc_platform *platform = rtd->platform; |
| struct snd_soc_dai *cpu_dai = rtd->cpu_dai; |
| struct snd_soc_dai *codec_dai = rtd->codec_dai; |
| struct snd_pcm_runtime *runtime = substream->runtime; |
| snd_pcm_uframes_t offset = 0; |
| snd_pcm_sframes_t delay = 0; |
| |
| if (platform->driver->ops && platform->driver->ops->pointer) |
| offset = platform->driver->ops->pointer(substream); |
| |
| if (cpu_dai->driver->ops && cpu_dai->driver->ops->delay) |
| delay += cpu_dai->driver->ops->delay(substream, cpu_dai); |
| |
| if (codec_dai->driver->ops && codec_dai->driver->ops->delay) |
| delay += codec_dai->driver->ops->delay(substream, codec_dai); |
| |
| if (platform->driver->delay) |
| delay += platform->driver->delay(substream, codec_dai); |
| |
| runtime->delay = delay; |
| |
| return offset; |
| } |
| |
| /* connect a FE and BE */ |
| static int dpcm_be_connect(struct snd_soc_pcm_runtime *fe, |
| struct snd_soc_pcm_runtime *be, int stream) |
| { |
| struct snd_soc_dpcm *dpcm; |
| |
| /* only add new dpcms */ |
| list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) { |
| if (dpcm->be == be && dpcm->fe == fe) |
| return 0; |
| } |
| |
| dpcm = kzalloc(sizeof(struct snd_soc_dpcm), GFP_KERNEL); |
| if (!dpcm) |
| return -ENOMEM; |
| |
| dpcm->be = be; |
| dpcm->fe = fe; |
| be->dpcm[stream].runtime = fe->dpcm[stream].runtime; |
| dpcm->state = SND_SOC_DPCM_LINK_STATE_NEW; |
| list_add(&dpcm->list_be, &fe->dpcm[stream].be_clients); |
| list_add(&dpcm->list_fe, &be->dpcm[stream].fe_clients); |
| |
| dev_dbg(fe->dev, "connected new DPCM %s path %s %s %s\n", |
| stream ? "capture" : "playback", fe->dai_link->name, |
| stream ? "<-" : "->", be->dai_link->name); |
| |
| #ifdef CONFIG_DEBUG_FS |
| dpcm->debugfs_state = debugfs_create_u32(be->dai_link->name, 0644, |
| fe->debugfs_dpcm_root, &dpcm->state); |
| #endif |
| return 1; |
| } |
| |
| /* reparent a BE onto another FE */ |
| static void dpcm_be_reparent(struct snd_soc_pcm_runtime *fe, |
| struct snd_soc_pcm_runtime *be, int stream) |
| { |
| struct snd_soc_dpcm *dpcm; |
| struct snd_pcm_substream *fe_substream, *be_substream; |
| |
| /* reparent if BE is connected to other FEs */ |
| if (!be->dpcm[stream].users) |
| return; |
| |
| be_substream = snd_soc_dpcm_get_substream(be, stream); |
| |
| list_for_each_entry(dpcm, &be->dpcm[stream].fe_clients, list_fe) { |
| if (dpcm->fe == fe) |
| continue; |
| |
| dev_dbg(fe->dev, "reparent %s path %s %s %s\n", |
| stream ? "capture" : "playback", |
| dpcm->fe->dai_link->name, |
| stream ? "<-" : "->", dpcm->be->dai_link->name); |
| |
| fe_substream = snd_soc_dpcm_get_substream(dpcm->fe, stream); |
| be_substream->runtime = fe_substream->runtime; |
| break; |
| } |
| } |
| |
| /* disconnect a BE and FE */ |
| void dpcm_be_disconnect(struct snd_soc_pcm_runtime *fe, int stream) |
| { |
| struct snd_soc_dpcm *dpcm, *d; |
| |
| list_for_each_entry_safe(dpcm, d, &fe->dpcm[stream].be_clients, list_be) { |
| dev_dbg(fe->dev, "ASoC: BE %s disconnect check for %s\n", |
| stream ? "capture" : "playback", |
| dpcm->be->dai_link->name); |
| |
| if (dpcm->state != SND_SOC_DPCM_LINK_STATE_FREE) |
| continue; |
| |
| dev_dbg(fe->dev, "freed DSP %s path %s %s %s\n", |
| stream ? "capture" : "playback", fe->dai_link->name, |
| stream ? "<-" : "->", dpcm->be->dai_link->name); |
| |
| /* BEs still alive need new FE */ |
| dpcm_be_reparent(fe, dpcm->be, stream); |
| |
| #ifdef CONFIG_DEBUG_FS |
| debugfs_remove(dpcm->debugfs_state); |
| #endif |
| list_del(&dpcm->list_be); |
| list_del(&dpcm->list_fe); |
| kfree(dpcm); |
| } |
| } |
| |
| /* get BE for DAI widget and stream */ |
| static struct snd_soc_pcm_runtime *dpcm_get_be(struct snd_soc_card *card, |
| struct snd_soc_dapm_widget *widget, int stream) |
| { |
| struct snd_soc_pcm_runtime *be; |
| int i; |
| |
| if (stream == SNDRV_PCM_STREAM_PLAYBACK) { |
| for (i = 0; i < card->num_links; i++) { |
| be = &card->rtd[i]; |
| |
| if (!be->dai_link->no_pcm) |
| continue; |
| |
| if (be->cpu_dai->playback_widget == widget || |
| be->codec_dai->playback_widget == widget) |
| return be; |
| } |
| } else { |
| |
| for (i = 0; i < card->num_links; i++) { |
| be = &card->rtd[i]; |
| |
| if (!be->dai_link->no_pcm) |
| continue; |
| |
| if (be->cpu_dai->capture_widget == widget || |
| be->codec_dai->capture_widget == widget) |
| return be; |
| } |
| } |
| |
| dev_err(card->dev, "ASoC: can't get %s BE for %s\n", |
| stream ? "capture" : "playback", widget->name); |
| return NULL; |
| } |
| |
| static inline struct snd_soc_dapm_widget * |
| rtd_get_cpu_widget(struct snd_soc_pcm_runtime *rtd, int stream) |
| { |
| if (stream == SNDRV_PCM_STREAM_PLAYBACK) |
| return rtd->cpu_dai->playback_widget; |
| else |
| return rtd->cpu_dai->capture_widget; |
| } |
| |
| static inline struct snd_soc_dapm_widget * |
| rtd_get_codec_widget(struct snd_soc_pcm_runtime *rtd, int stream) |
| { |
| if (stream == SNDRV_PCM_STREAM_PLAYBACK) |
| return rtd->codec_dai->playback_widget; |
| else |
| return rtd->codec_dai->capture_widget; |
| } |
| |
| static int widget_in_list(struct snd_soc_dapm_widget_list *list, |
| struct snd_soc_dapm_widget *widget) |
| { |
| int i; |
| |
| for (i = 0; i < list->num_widgets; i++) { |
| if (widget == list->widgets[i]) |
| return 1; |
| } |
| |
| return 0; |
| } |
| |
| int dpcm_path_get(struct snd_soc_pcm_runtime *fe, |
| int stream, struct snd_soc_dapm_widget_list **list_) |
| { |
| struct snd_soc_dai *cpu_dai = fe->cpu_dai; |
| struct snd_soc_dapm_widget_list *list; |
| int paths; |
| |
| list = kzalloc(sizeof(struct snd_soc_dapm_widget_list) + |
| sizeof(struct snd_soc_dapm_widget *), GFP_KERNEL); |
| if (list == NULL) |
| return -ENOMEM; |
| |
| /* get number of valid DAI paths and their widgets */ |
| paths = snd_soc_dapm_dai_get_connected_widgets(cpu_dai, stream, &list); |
| |
| dev_dbg(fe->dev, "ASoC: found %d audio %s paths\n", paths, |
| stream ? "capture" : "playback"); |
| |
| *list_ = list; |
| return paths; |
| } |
| |
| static int dpcm_prune_paths(struct snd_soc_pcm_runtime *fe, int stream, |
| struct snd_soc_dapm_widget_list **list_) |
| { |
| struct snd_soc_dpcm *dpcm; |
| struct snd_soc_dapm_widget_list *list = *list_; |
| struct snd_soc_dapm_widget *widget; |
| int prune = 0; |
| |
| /* Destroy any old FE <--> BE connections */ |
| list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) { |
| |
| /* is there a valid CPU DAI widget for this BE */ |
| widget = rtd_get_cpu_widget(dpcm->be, stream); |
| |
| /* prune the BE if it's no longer in our active list */ |
| if (widget && widget_in_list(list, widget)) |
| continue; |
| |
| /* is there a valid CODEC DAI widget for this BE */ |
| widget = rtd_get_codec_widget(dpcm->be, stream); |
| |
| /* prune the BE if it's no longer in our active list */ |
| if (widget && widget_in_list(list, widget)) |
| continue; |
| |
| dev_dbg(fe->dev, "ASoC: pruning %s BE %s for %s\n", |
| stream ? "capture" : "playback", |
| dpcm->be->dai_link->name, fe->dai_link->name); |
| dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE; |
| dpcm->be->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_BE; |
| prune++; |
| } |
| |
| dev_dbg(fe->dev, "ASoC: found %d old BE paths for pruning\n", prune); |
| return prune; |
| } |
| |
| static int dpcm_add_paths(struct snd_soc_pcm_runtime *fe, int stream, |
| struct snd_soc_dapm_widget_list **list_) |
| { |
| struct snd_soc_card *card = fe->card; |
| struct snd_soc_dapm_widget_list *list = *list_; |
| struct snd_soc_pcm_runtime *be; |
| int i, new = 0, err; |
| |
| /* Create any new FE <--> BE connections */ |
| for (i = 0; i < list->num_widgets; i++) { |
| |
| switch (list->widgets[i]->id) { |
| case snd_soc_dapm_dai_in: |
| case snd_soc_dapm_dai_out: |
| break; |
| default: |
| continue; |
| } |
| |
| /* is there a valid BE rtd for this widget */ |
| be = dpcm_get_be(card, list->widgets[i], stream); |
| if (!be) { |
| dev_err(fe->dev, "ASoC: no BE found for %s\n", |
| list->widgets[i]->name); |
| continue; |
| } |
| |
| /* make sure BE is a real BE */ |
| if (!be->dai_link->no_pcm) |
| continue; |
| |
| /* don't connect if FE is not running */ |
| if (!fe->dpcm[stream].runtime && !fe->fe_compr) |
| continue; |
| |
| /* newly connected FE and BE */ |
| err = dpcm_be_connect(fe, be, stream); |
| if (err < 0) { |
| dev_err(fe->dev, "ASoC: can't connect %s\n", |
| list->widgets[i]->name); |
| break; |
| } else if (err == 0) /* already connected */ |
| continue; |
| |
| /* new */ |
| be->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_BE; |
| new++; |
| } |
| |
| dev_dbg(fe->dev, "ASoC: found %d new BE paths\n", new); |
| return new; |
| } |
| |
| /* |
| * Find the corresponding BE DAIs that source or sink audio to this |
| * FE substream. |
| */ |
| int dpcm_process_paths(struct snd_soc_pcm_runtime *fe, |
| int stream, struct snd_soc_dapm_widget_list **list, int new) |
| { |
| if (new) |
| return dpcm_add_paths(fe, stream, list); |
| else |
| return dpcm_prune_paths(fe, stream, list); |
| } |
| |
| void dpcm_clear_pending_state(struct snd_soc_pcm_runtime *fe, int stream) |
| { |
| struct snd_soc_dpcm *dpcm; |
| |
| list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) |
| dpcm->be->dpcm[stream].runtime_update = |
| SND_SOC_DPCM_UPDATE_NO; |
| } |
| |
| static void dpcm_be_dai_startup_unwind(struct snd_soc_pcm_runtime *fe, |
| int stream) |
| { |
| struct snd_soc_dpcm *dpcm; |
| |
| /* disable any enabled and non active backends */ |
| list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) { |
| |
| struct snd_soc_pcm_runtime *be = dpcm->be; |
| struct snd_pcm_substream *be_substream = |
| snd_soc_dpcm_get_substream(be, stream); |
| |
| if (be->dpcm[stream].users == 0) |
| dev_err(be->dev, "ASoC: no users %s at close - state %d\n", |
| stream ? "capture" : "playback", |
| be->dpcm[stream].state); |
| |
| if (--be->dpcm[stream].users != 0) |
| continue; |
| |
| if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN) |
| continue; |
| |
| soc_pcm_close(be_substream); |
| be_substream->runtime = NULL; |
| be->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE; |
| } |
| } |
| |
| int dpcm_be_dai_startup(struct snd_soc_pcm_runtime *fe, int stream) |
| { |
| struct snd_soc_dpcm *dpcm; |
| int err, count = 0; |
| |
| /* only startup BE DAIs that are either sinks or sources to this FE DAI */ |
| list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) { |
| |
| struct snd_soc_pcm_runtime *be = dpcm->be; |
| struct snd_pcm_substream *be_substream = |
| snd_soc_dpcm_get_substream(be, stream); |
| |
| if (!be_substream) { |
| dev_err(be->dev, "ASoC: no backend %s stream\n", |
| stream ? "capture" : "playback"); |
| continue; |
| } |
| |
| /* is this op for this BE ? */ |
| if (!snd_soc_dpcm_be_can_update(fe, be, stream)) |
| continue; |
| |
| /* first time the dpcm is open ? */ |
| if (be->dpcm[stream].users == DPCM_MAX_BE_USERS) |
| dev_err(be->dev, "ASoC: too many users %s at open %d\n", |
| stream ? "capture" : "playback", |
| be->dpcm[stream].state); |
| |
| if (be->dpcm[stream].users++ != 0) |
| continue; |
| |
| if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_NEW) && |
| (be->dpcm[stream].state != SND_SOC_DPCM_STATE_CLOSE)) |
| continue; |
| |
| dev_dbg(be->dev, "ASoC: open %s BE %s\n", |
| stream ? "capture" : "playback", be->dai_link->name); |
| |
| be_substream->runtime = be->dpcm[stream].runtime; |
| err = soc_pcm_open(be_substream); |
| if (err < 0) { |
| dev_err(be->dev, "ASoC: BE open failed %d\n", err); |
| be->dpcm[stream].users--; |
| if (be->dpcm[stream].users < 0) |
| dev_err(be->dev, "ASoC: no users %s at unwind %d\n", |
| stream ? "capture" : "playback", |
| be->dpcm[stream].state); |
| |
| be->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE; |
| goto unwind; |
| } |
| |
| be->dpcm[stream].state = SND_SOC_DPCM_STATE_OPEN; |
| count++; |
| } |
| |
| return count; |
| |
| unwind: |
| /* disable any enabled and non active backends */ |
| list_for_each_entry_continue_reverse(dpcm, &fe->dpcm[stream].be_clients, list_be) { |
| struct snd_soc_pcm_runtime *be = dpcm->be; |
| struct snd_pcm_substream *be_substream = |
| snd_soc_dpcm_get_substream(be, stream); |
| |
| if (!snd_soc_dpcm_be_can_update(fe, be, stream)) |
| continue; |
| |
| if (be->dpcm[stream].users == 0) |
| dev_err(be->dev, "ASoC: no users %s at close %d\n", |
| stream ? "capture" : "playback", |
| be->dpcm[stream].state); |
| |
| if (--be->dpcm[stream].users != 0) |
| continue; |
| |
| if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN) |
| continue; |
| |
| soc_pcm_close(be_substream); |
| be_substream->runtime = NULL; |
| be->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE; |
| } |
| |
| return err; |
| } |
| |
| static void dpcm_init_runtime_hw(struct snd_pcm_runtime *runtime, |
| struct snd_soc_pcm_stream *stream) |
| { |
| runtime->hw.rate_min = stream->rate_min; |
| runtime->hw.rate_max = stream->rate_max; |
| runtime->hw.channels_min = stream->channels_min; |
| runtime->hw.channels_max = stream->channels_max; |
| if (runtime->hw.formats) |
| runtime->hw.formats &= stream->formats; |
| else |
| runtime->hw.formats = stream->formats; |
| runtime->hw.rates = stream->rates; |
| } |
| |
| static void dpcm_set_fe_runtime(struct snd_pcm_substream *substream) |
| { |
| struct snd_pcm_runtime *runtime = substream->runtime; |
| struct snd_soc_pcm_runtime *rtd = substream->private_data; |
| struct snd_soc_dai *cpu_dai = rtd->cpu_dai; |
| struct snd_soc_dai_driver *cpu_dai_drv = cpu_dai->driver; |
| |
| if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) |
| dpcm_init_runtime_hw(runtime, &cpu_dai_drv->playback); |
| else |
| dpcm_init_runtime_hw(runtime, &cpu_dai_drv->capture); |
| } |
| |
| static int dpcm_fe_dai_startup(struct snd_pcm_substream *fe_substream) |
| { |
| struct snd_soc_pcm_runtime *fe = fe_substream->private_data; |
| struct snd_pcm_runtime *runtime = fe_substream->runtime; |
| int stream = fe_substream->stream, ret = 0; |
| |
| fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_FE; |
| |
| ret = dpcm_be_dai_startup(fe, fe_substream->stream); |
| if (ret < 0) { |
| dev_err(fe->dev,"ASoC: failed to start some BEs %d\n", ret); |
| goto be_err; |
| } |
| |
| dev_dbg(fe->dev, "ASoC: open FE %s\n", fe->dai_link->name); |
| |
| /* start the DAI frontend */ |
| ret = soc_pcm_open(fe_substream); |
| if (ret < 0) { |
| dev_err(fe->dev,"ASoC: failed to start FE %d\n", ret); |
| goto unwind; |
| } |
| |
| fe->dpcm[stream].state = SND_SOC_DPCM_STATE_OPEN; |
| |
| dpcm_set_fe_runtime(fe_substream); |
| snd_pcm_limit_hw_rates(runtime); |
| |
| fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_NO; |
| return 0; |
| |
| unwind: |
| dpcm_be_dai_startup_unwind(fe, fe_substream->stream); |
| be_err: |
| fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_NO; |
| return ret; |
| } |
| |
| int dpcm_be_dai_shutdown(struct snd_soc_pcm_runtime *fe, int stream) |
| { |
| struct snd_soc_dpcm *dpcm; |
| |
| /* only shutdown BEs that are either sinks or sources to this FE DAI */ |
| list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) { |
| |
| struct snd_soc_pcm_runtime *be = dpcm->be; |
| struct snd_pcm_substream *be_substream = |
| snd_soc_dpcm_get_substream(be, stream); |
| |
| /* is this op for this BE ? */ |
| if (!snd_soc_dpcm_be_can_update(fe, be, stream)) |
| continue; |
| |
| if (be->dpcm[stream].users == 0) |
| dev_err(be->dev, "ASoC: no users %s at close - state %d\n", |
| stream ? "capture" : "playback", |
| be->dpcm[stream].state); |
| |
| if (--be->dpcm[stream].users != 0) |
| continue; |
| |
| if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE) && |
| (be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN)) |
| continue; |
| |
| dev_dbg(be->dev, "ASoC: close BE %s\n", |
| dpcm->fe->dai_link->name); |
| |
| soc_pcm_close(be_substream); |
| be_substream->runtime = NULL; |
| |
| be->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE; |
| } |
| return 0; |
| } |
| |
| static int dpcm_fe_dai_shutdown(struct snd_pcm_substream *substream) |
| { |
| struct snd_soc_pcm_runtime *fe = substream->private_data; |
| int stream = substream->stream; |
| |
| fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_FE; |
| |
| /* shutdown the BEs */ |
| dpcm_be_dai_shutdown(fe, substream->stream); |
| |
| dev_dbg(fe->dev, "ASoC: close FE %s\n", fe->dai_link->name); |
| |
| /* now shutdown the frontend */ |
| soc_pcm_close(substream); |
| |
| /* run the stream event for each BE */ |
| dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_STOP); |
| |
| fe->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE; |
| fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_NO; |
| return 0; |
| } |
| |
| int dpcm_be_dai_hw_free(struct snd_soc_pcm_runtime *fe, int stream) |
| { |
| struct snd_soc_dpcm *dpcm; |
| |
| /* only hw_params backends that are either sinks or sources |
| * to this frontend DAI */ |
| list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) { |
| |
| struct snd_soc_pcm_runtime *be = dpcm->be; |
| struct snd_pcm_substream *be_substream = |
| snd_soc_dpcm_get_substream(be, stream); |
| |
| /* is this op for this BE ? */ |
| if (!snd_soc_dpcm_be_can_update(fe, be, stream)) |
| continue; |
| |
| /* only free hw when no longer used - check all FEs */ |
| if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream)) |
| continue; |
| |
| if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) && |
| (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PREPARE) && |
| (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE) && |
| (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED) && |
| (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP)) |
| continue; |
| |
| dev_dbg(be->dev, "ASoC: hw_free BE %s\n", |
| dpcm->fe->dai_link->name); |
| |
| soc_pcm_hw_free(be_substream); |
| |
| be->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_FREE; |
| } |
| |
| return 0; |
| } |
| |
| static int dpcm_fe_dai_hw_free(struct snd_pcm_substream *substream) |
| { |
| struct snd_soc_pcm_runtime *fe = substream->private_data; |
| int err, stream = substream->stream; |
| |
| mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME); |
| fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_FE; |
| |
| dev_dbg(fe->dev, "ASoC: hw_free FE %s\n", fe->dai_link->name); |
| |
| /* call hw_free on the frontend */ |
| err = soc_pcm_hw_free(substream); |
| if (err < 0) |
| dev_err(fe->dev,"ASoC: hw_free FE %s failed\n", |
| fe->dai_link->name); |
| |
| /* only hw_params backends that are either sinks or sources |
| * to this frontend DAI */ |
| err = dpcm_be_dai_hw_free(fe, stream); |
| |
| fe->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_FREE; |
| fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_NO; |
| |
| mutex_unlock(&fe->card->mutex); |
| return 0; |
| } |
| |
| int dpcm_be_dai_hw_params(struct snd_soc_pcm_runtime *fe, int stream) |
| { |
| struct snd_soc_dpcm *dpcm; |
| int ret; |
| |
| list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) { |
| |
| struct snd_soc_pcm_runtime *be = dpcm->be; |
| struct snd_pcm_substream *be_substream = |
| snd_soc_dpcm_get_substream(be, stream); |
| |
| /* is this op for this BE ? */ |
| if (!snd_soc_dpcm_be_can_update(fe, be, stream)) |
| continue; |
| |
| /* only allow hw_params() if no connected FEs are running */ |
| if (!snd_soc_dpcm_can_be_params(fe, be, stream)) |
| continue; |
| |
| if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN) && |
| (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) && |
| (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE)) |
| continue; |
| |
| dev_dbg(be->dev, "ASoC: hw_params BE %s\n", |
| dpcm->fe->dai_link->name); |
| |
| /* copy params for each dpcm */ |
| memcpy(&dpcm->hw_params, &fe->dpcm[stream].hw_params, |
| sizeof(struct snd_pcm_hw_params)); |
| |
| /* perform any hw_params fixups */ |
| if (be->dai_link->be_hw_params_fixup) { |
| ret = be->dai_link->be_hw_params_fixup(be, |
| &dpcm->hw_params); |
| if (ret < 0) { |
| dev_err(be->dev, |
| "ASoC: hw_params BE fixup failed %d\n", |
| ret); |
| goto unwind; |
| } |
| } |
| |
| ret = soc_pcm_hw_params(be_substream, &dpcm->hw_params); |
| if (ret < 0) { |
| dev_err(dpcm->be->dev, |
| "ASoC: hw_params BE failed %d\n", ret); |
| goto unwind; |
| } |
| |
| be->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_PARAMS; |
| } |
| return 0; |
| |
| unwind: |
| /* disable any enabled and non active backends */ |
| list_for_each_entry_continue_reverse(dpcm, &fe->dpcm[stream].be_clients, list_be) { |
| struct snd_soc_pcm_runtime *be = dpcm->be; |
| struct snd_pcm_substream *be_substream = |
| snd_soc_dpcm_get_substream(be, stream); |
| |
| if (!snd_soc_dpcm_be_can_update(fe, be, stream)) |
| continue; |
| |
| /* only allow hw_free() if no connected FEs are running */ |
| if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream)) |
| continue; |
| |
| if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN) && |
| (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) && |
| (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE) && |
| (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP)) |
| continue; |
| |
| soc_pcm_hw_free(be_substream); |
| } |
| |
| return ret; |
| } |
| |
| static int dpcm_fe_dai_hw_params(struct snd_pcm_substream *substream, |
| struct snd_pcm_hw_params *params) |
| { |
| struct snd_soc_pcm_runtime *fe = substream->private_data; |
| int ret, stream = substream->stream; |
| |
| mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME); |
| fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_FE; |
| |
| memcpy(&fe->dpcm[substream->stream].hw_params, params, |
| sizeof(struct snd_pcm_hw_params)); |
| ret = dpcm_be_dai_hw_params(fe, substream->stream); |
| if (ret < 0) { |
| dev_err(fe->dev,"ASoC: hw_params BE failed %d\n", ret); |
| goto out; |
| } |
| |
| dev_dbg(fe->dev, "ASoC: hw_params FE %s rate %d chan %x fmt %d\n", |
| fe->dai_link->name, params_rate(params), |
| params_channels(params), params_format(params)); |
| |
| /* call hw_params on the frontend */ |
| ret = soc_pcm_hw_params(substream, params); |
| if (ret < 0) { |
| dev_err(fe->dev,"ASoC: hw_params FE failed %d\n", ret); |
| dpcm_be_dai_hw_free(fe, stream); |
| } else |
| fe->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_PARAMS; |
| |
| out: |
| fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_NO; |
| mutex_unlock(&fe->card->mutex); |
| return ret; |
| } |
| |
| static int dpcm_do_trigger(struct snd_soc_dpcm *dpcm, |
| struct snd_pcm_substream *substream, int cmd) |
| { |
| int ret; |
| |
| dev_dbg(dpcm->be->dev, "ASoC: trigger BE %s cmd %d\n", |
| dpcm->fe->dai_link->name, cmd); |
| |
| ret = soc_pcm_trigger(substream, cmd); |
| if (ret < 0) |
| dev_err(dpcm->be->dev,"ASoC: trigger BE failed %d\n", ret); |
| |
| return ret; |
| } |
| |
| int dpcm_be_dai_trigger(struct snd_soc_pcm_runtime *fe, int stream, |
| int cmd) |
| { |
| struct snd_soc_dpcm *dpcm; |
| int ret = 0; |
| |
| list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) { |
| |
| struct snd_soc_pcm_runtime *be = dpcm->be; |
| struct snd_pcm_substream *be_substream = |
| snd_soc_dpcm_get_substream(be, stream); |
| |
| /* is this op for this BE ? */ |
| if (!snd_soc_dpcm_be_can_update(fe, be, stream)) |
| continue; |
| |
| switch (cmd) { |
| case SNDRV_PCM_TRIGGER_START: |
| if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_PREPARE) && |
| (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP)) |
| continue; |
| |
| ret = dpcm_do_trigger(dpcm, be_substream, cmd); |
| if (ret) |
| return ret; |
| |
| be->dpcm[stream].state = SND_SOC_DPCM_STATE_START; |
| break; |
| case SNDRV_PCM_TRIGGER_RESUME: |
| if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_SUSPEND)) |
| continue; |
| |
| ret = dpcm_do_trigger(dpcm, be_substream, cmd); |
| if (ret) |
| return ret; |
| |
| be->dpcm[stream].state = SND_SOC_DPCM_STATE_START; |
| break; |
| case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: |
| if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED)) |
| continue; |
| |
| ret = dpcm_do_trigger(dpcm, be_substream, cmd); |
| if (ret) |
| return ret; |
| |
| be->dpcm[stream].state = SND_SOC_DPCM_STATE_START; |
| break; |
| case SNDRV_PCM_TRIGGER_STOP: |
| if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START) |
| continue; |
| |
| if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream)) |
| continue; |
| |
| ret = dpcm_do_trigger(dpcm, be_substream, cmd); |
| if (ret) |
| return ret; |
| |
| be->dpcm[stream].state = SND_SOC_DPCM_STATE_STOP; |
| break; |
| case SNDRV_PCM_TRIGGER_SUSPEND: |
| if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP) |
| continue; |
| |
| if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream)) |
| continue; |
| |
| ret = dpcm_do_trigger(dpcm, be_substream, cmd); |
| if (ret) |
| return ret; |
| |
| be->dpcm[stream].state = SND_SOC_DPCM_STATE_SUSPEND; |
| break; |
| case SNDRV_PCM_TRIGGER_PAUSE_PUSH: |
| if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START) |
| continue; |
| |
| if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream)) |
| continue; |
| |
| ret = dpcm_do_trigger(dpcm, be_substream, cmd); |
| if (ret) |
| return ret; |
| |
| be->dpcm[stream].state = SND_SOC_DPCM_STATE_PAUSED; |
| break; |
| } |
| } |
| |
| return ret; |
| } |
| EXPORT_SYMBOL_GPL(dpcm_be_dai_trigger); |
| |
| static int dpcm_fe_dai_trigger(struct snd_pcm_substream *substream, int cmd) |
| { |
| struct snd_soc_pcm_runtime *fe = substream->private_data; |
| int stream = substream->stream, ret; |
| enum snd_soc_dpcm_trigger trigger = fe->dai_link->trigger[stream]; |
| |
| fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_FE; |
| |
| switch (trigger) { |
| case SND_SOC_DPCM_TRIGGER_PRE: |
| /* call trigger on the frontend before the backend. */ |
| |
| dev_dbg(fe->dev, "ASoC: pre trigger FE %s cmd %d\n", |
| fe->dai_link->name, cmd); |
| |
| ret = soc_pcm_trigger(substream, cmd); |
| if (ret < 0) { |
| dev_err(fe->dev,"ASoC: trigger FE failed %d\n", ret); |
| goto out; |
| } |
| |
| ret = dpcm_be_dai_trigger(fe, substream->stream, cmd); |
| break; |
| case SND_SOC_DPCM_TRIGGER_POST: |
| /* call trigger on the frontend after the backend. */ |
| |
| ret = dpcm_be_dai_trigger(fe, substream->stream, cmd); |
| if (ret < 0) { |
| dev_err(fe->dev,"ASoC: trigger FE failed %d\n", ret); |
| goto out; |
| } |
| |
| dev_dbg(fe->dev, "ASoC: post trigger FE %s cmd %d\n", |
| fe->dai_link->name, cmd); |
| |
| ret = soc_pcm_trigger(substream, cmd); |
| break; |
| case SND_SOC_DPCM_TRIGGER_BESPOKE: |
| /* bespoke trigger() - handles both FE and BEs */ |
| |
| dev_dbg(fe->dev, "ASoC: bespoke trigger FE %s cmd %d\n", |
| fe->dai_link->name, cmd); |
| |
| ret = soc_pcm_bespoke_trigger(substream, cmd); |
| if (ret < 0) { |
| dev_err(fe->dev,"ASoC: trigger FE failed %d\n", ret); |
| goto out; |
| } |
| break; |
| default: |
| dev_err(fe->dev, "ASoC: invalid trigger cmd %d for %s\n", cmd, |
| fe->dai_link->name); |
| ret = -EINVAL; |
| goto out; |
| } |
| |
| switch (cmd) { |
| case SNDRV_PCM_TRIGGER_START: |
| case SNDRV_PCM_TRIGGER_RESUME: |
| case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: |
| fe->dpcm[stream].state = SND_SOC_DPCM_STATE_START; |
| break; |
| case SNDRV_PCM_TRIGGER_STOP: |
| case SNDRV_PCM_TRIGGER_SUSPEND: |
| case SNDRV_PCM_TRIGGER_PAUSE_PUSH: |
| fe->dpcm[stream].state = SND_SOC_DPCM_STATE_STOP; |
| break; |
| } |
| |
| out: |
| fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_NO; |
| return ret; |
| } |
| |
| int dpcm_be_dai_prepare(struct snd_soc_pcm_runtime *fe, int stream) |
| { |
| struct snd_soc_dpcm *dpcm; |
| int ret = 0; |
| |
| list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) { |
| |
| struct snd_soc_pcm_runtime *be = dpcm->be; |
| struct snd_pcm_substream *be_substream = |
| snd_soc_dpcm_get_substream(be, stream); |
| |
| /* is this op for this BE ? */ |
| if (!snd_soc_dpcm_be_can_update(fe, be, stream)) |
| continue; |
| |
| if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) && |
| (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP)) |
| continue; |
| |
| dev_dbg(be->dev, "ASoC: prepare BE %s\n", |
| dpcm->fe->dai_link->name); |
| |
| ret = soc_pcm_prepare(be_substream); |
| if (ret < 0) { |
| dev_err(be->dev, "ASoC: backend prepare failed %d\n", |
| ret); |
| break; |
| } |
| |
| be->dpcm[stream].state = SND_SOC_DPCM_STATE_PREPARE; |
| } |
| return ret; |
| } |
| |
| static int dpcm_fe_dai_prepare(struct snd_pcm_substream *substream) |
| { |
| struct snd_soc_pcm_runtime *fe = substream->private_data; |
| int stream = substream->stream, ret = 0; |
| |
| mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME); |
| |
| dev_dbg(fe->dev, "ASoC: prepare FE %s\n", fe->dai_link->name); |
| |
| fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_FE; |
| |
| /* there is no point preparing this FE if there are no BEs */ |
| if (list_empty(&fe->dpcm[stream].be_clients)) { |
| dev_err(fe->dev, "ASoC: no backend DAIs enabled for %s\n", |
| fe->dai_link->name); |
| ret = -EINVAL; |
| goto out; |
| } |
| |
| ret = dpcm_be_dai_prepare(fe, substream->stream); |
| if (ret < 0) |
| goto out; |
| |
| /* call prepare on the frontend */ |
| ret = soc_pcm_prepare(substream); |
| if (ret < 0) { |
| dev_err(fe->dev,"ASoC: prepare FE %s failed\n", |
| fe->dai_link->name); |
| goto out; |
| } |
| |
| /* run the stream event for each BE */ |
| dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_START); |
| fe->dpcm[stream].state = SND_SOC_DPCM_STATE_PREPARE; |
| |
| out: |
| fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_NO; |
| mutex_unlock(&fe->card->mutex); |
| |
| return ret; |
| } |
| |
| static int soc_pcm_ioctl(struct snd_pcm_substream *substream, |
| unsigned int cmd, void *arg) |
| { |
| struct snd_soc_pcm_runtime *rtd = substream->private_data; |
| struct snd_soc_platform *platform = rtd->platform; |
| |
| if (platform->driver->ops && platform->driver->ops->ioctl) |
| return platform->driver->ops->ioctl(substream, cmd, arg); |
| return snd_pcm_lib_ioctl(substream, cmd, arg); |
| } |
| |
| static int dpcm_run_update_shutdown(struct snd_soc_pcm_runtime *fe, int stream) |
| { |
| struct snd_pcm_substream *substream = |
| snd_soc_dpcm_get_substream(fe, stream); |
| enum snd_soc_dpcm_trigger trigger = fe->dai_link->trigger[stream]; |
| int err; |
| |
| dev_dbg(fe->dev, "ASoC: runtime %s close on FE %s\n", |
| stream ? "capture" : "playback", fe->dai_link->name); |
| |
| if (trigger == SND_SOC_DPCM_TRIGGER_BESPOKE) { |
| /* call bespoke trigger - FE takes care of all BE triggers */ |
| dev_dbg(fe->dev, "ASoC: bespoke trigger FE %s cmd stop\n", |
| fe->dai_link->name); |
| |
| err = soc_pcm_bespoke_trigger(substream, SNDRV_PCM_TRIGGER_STOP); |
| if (err < 0) |
| dev_err(fe->dev,"ASoC: trigger FE failed %d\n", err); |
| } else { |
| dev_dbg(fe->dev, "ASoC: trigger FE %s cmd stop\n", |
| fe->dai_link->name); |
| |
| err = dpcm_be_dai_trigger(fe, stream, SNDRV_PCM_TRIGGER_STOP); |
| if (err < 0) |
| dev_err(fe->dev,"ASoC: trigger FE failed %d\n", err); |
| } |
| |
| err = dpcm_be_dai_hw_free(fe, stream); |
| if (err < 0) |
| dev_err(fe->dev,"ASoC: hw_free FE failed %d\n", err); |
| |
| err = dpcm_be_dai_shutdown(fe, stream); |
| if (err < 0) |
| dev_err(fe->dev,"ASoC: shutdown FE failed %d\n", err); |
| |
| /* run the stream event for each BE */ |
| dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_NOP); |
| |
| return 0; |
| } |
| |
| static int dpcm_run_update_startup(struct snd_soc_pcm_runtime *fe, int stream) |
| { |
| struct snd_pcm_substream *substream = |
| snd_soc_dpcm_get_substream(fe, stream); |
| struct snd_soc_dpcm *dpcm; |
| enum snd_soc_dpcm_trigger trigger = fe->dai_link->trigger[stream]; |
| int ret; |
| |
| dev_dbg(fe->dev, "ASoC: runtime %s open on FE %s\n", |
| stream ? "capture" : "playback", fe->dai_link->name); |
| |
| /* Only start the BE if the FE is ready */ |
| if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_HW_FREE || |
| fe->dpcm[stream].state == SND_SOC_DPCM_STATE_CLOSE) |
| return -EINVAL; |
| |
| /* startup must always be called for new BEs */ |
| ret = dpcm_be_dai_startup(fe, stream); |
| if (ret < 0) |
| goto disconnect; |
| |
| /* keep going if FE state is > open */ |
| if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_OPEN) |
| return 0; |
| |
| ret = dpcm_be_dai_hw_params(fe, stream); |
| if (ret < 0) |
| goto close; |
| |
| /* keep going if FE state is > hw_params */ |
| if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_HW_PARAMS) |
| return 0; |
| |
| |
| ret = dpcm_be_dai_prepare(fe, stream); |
| if (ret < 0) |
| goto hw_free; |
| |
| /* run the stream event for each BE */ |
| dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_NOP); |
| |
| /* keep going if FE state is > prepare */ |
| if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_PREPARE || |
| fe->dpcm[stream].state == SND_SOC_DPCM_STATE_STOP) |
| return 0; |
| |
| if (trigger == SND_SOC_DPCM_TRIGGER_BESPOKE) { |
| /* call trigger on the frontend - FE takes care of all BE triggers */ |
| dev_dbg(fe->dev, "ASoC: bespoke trigger FE %s cmd start\n", |
| fe->dai_link->name); |
| |
| ret = soc_pcm_bespoke_trigger(substream, SNDRV_PCM_TRIGGER_START); |
| if (ret < 0) { |
| dev_err(fe->dev,"ASoC: bespoke trigger FE failed %d\n", ret); |
| goto hw_free; |
| } |
| } else { |
| dev_dbg(fe->dev, "ASoC: trigger FE %s cmd start\n", |
| fe->dai_link->name); |
| |
| ret = dpcm_be_dai_trigger(fe, stream, |
| SNDRV_PCM_TRIGGER_START); |
| if (ret < 0) { |
| dev_err(fe->dev,"ASoC: trigger FE failed %d\n", ret); |
| goto hw_free; |
| } |
| } |
| |
| return 0; |
| |
| hw_free: |
| dpcm_be_dai_hw_free(fe, stream); |
| close: |
| dpcm_be_dai_shutdown(fe, stream); |
| disconnect: |
| /* disconnect any non started BEs */ |
| list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) { |
| struct snd_soc_pcm_runtime *be = dpcm->be; |
| if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START) |
| dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE; |
| } |
| |
| return ret; |
| } |
| |
| static int dpcm_run_new_update(struct snd_soc_pcm_runtime *fe, int stream) |
| { |
| int ret; |
| |
| fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_BE; |
| ret = dpcm_run_update_startup(fe, stream); |
| if (ret < 0) |
| dev_err(fe->dev, "ASoC: failed to startup some BEs\n"); |
| fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_NO; |
| |
| return ret; |
| } |
| |
| static int dpcm_run_old_update(struct snd_soc_pcm_runtime *fe, int stream) |
| { |
| int ret; |
| |
| fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_BE; |
| ret = dpcm_run_update_shutdown(fe, stream); |
| if (ret < 0) |
| dev_err(fe->dev, "ASoC: failed to shutdown some BEs\n"); |
| fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_NO; |
| |
| return ret; |
| } |
| |
| /* Called by DAPM mixer/mux changes to update audio routing between PCMs and |
| * any DAI links. |
| */ |
| int soc_dpcm_runtime_update(struct snd_soc_card *card) |
| { |
| int i, old, new, paths; |
| |
| mutex_lock_nested(&card->mutex, SND_SOC_CARD_CLASS_RUNTIME); |
| for (i = 0; i < card->num_rtd; i++) { |
| struct snd_soc_dapm_widget_list *list; |
| struct snd_soc_pcm_runtime *fe = &card->rtd[i]; |
| |
| /* make sure link is FE */ |
| if (!fe->dai_link->dynamic) |
| continue; |
| |
| /* only check active links */ |
| if (!fe->cpu_dai->active) |
| continue; |
| |
| /* DAPM sync will call this to update DSP paths */ |
| dev_dbg(fe->dev, "ASoC: DPCM runtime update for FE %s\n", |
| fe->dai_link->name); |
| |
| /* skip if FE doesn't have playback capability */ |
| if (!fe->cpu_dai->driver->playback.channels_min) |
| goto capture; |
| |
| paths = dpcm_path_get(fe, SNDRV_PCM_STREAM_PLAYBACK, &list); |
| if (paths < 0) { |
| dev_warn(fe->dev, "ASoC: %s no valid %s path\n", |
| fe->dai_link->name, "playback"); |
| mutex_unlock(&card->mutex); |
| return paths; |
| } |
| |
| /* update any new playback paths */ |
| new = dpcm_process_paths(fe, SNDRV_PCM_STREAM_PLAYBACK, &list, 1); |
| if (new) { |
| dpcm_run_new_update(fe, SNDRV_PCM_STREAM_PLAYBACK); |
| dpcm_clear_pending_state(fe, SNDRV_PCM_STREAM_PLAYBACK); |
| dpcm_be_disconnect(fe, SNDRV_PCM_STREAM_PLAYBACK); |
| } |
| |
| /* update any old playback paths */ |
| old = dpcm_process_paths(fe, SNDRV_PCM_STREAM_PLAYBACK, &list, 0); |
| if (old) { |
| dpcm_run_old_update(fe, SNDRV_PCM_STREAM_PLAYBACK); |
| dpcm_clear_pending_state(fe, SNDRV_PCM_STREAM_PLAYBACK); |
| dpcm_be_disconnect(fe, SNDRV_PCM_STREAM_PLAYBACK); |
| } |
| |
| capture: |
| /* skip if FE doesn't have capture capability */ |
| if (!fe->cpu_dai->driver->capture.channels_min) |
| continue; |
| |
| paths = dpcm_path_get(fe, SNDRV_PCM_STREAM_CAPTURE, &list); |
| if (paths < 0) { |
| dev_warn(fe->dev, "ASoC: %s no valid %s path\n", |
| fe->dai_link->name, "capture"); |
| mutex_unlock(&card->mutex); |
| return paths; |
| } |
| |
| /* update any new capture paths */ |
| new = dpcm_process_paths(fe, SNDRV_PCM_STREAM_CAPTURE, &list, 1); |
| if (new) { |
| dpcm_run_new_update(fe, SNDRV_PCM_STREAM_CAPTURE); |
| dpcm_clear_pending_state(fe, SNDRV_PCM_STREAM_CAPTURE); |
| dpcm_be_disconnect(fe, SNDRV_PCM_STREAM_CAPTURE); |
| } |
| |
| /* update any old capture paths */ |
| old = dpcm_process_paths(fe, SNDRV_PCM_STREAM_CAPTURE, &list, 0); |
| if (old) { |
| dpcm_run_old_update(fe, SNDRV_PCM_STREAM_CAPTURE); |
| dpcm_clear_pending_state(fe, SNDRV_PCM_STREAM_CAPTURE); |
| dpcm_be_disconnect(fe, SNDRV_PCM_STREAM_CAPTURE); |
| } |
| |
| dpcm_path_put(&list); |
| } |
| |
| mutex_unlock(&card->mutex); |
| return 0; |
| } |
| int soc_dpcm_be_digital_mute(struct snd_soc_pcm_runtime *fe, int mute) |
| { |
| struct snd_soc_dpcm *dpcm; |
| struct list_head *clients = |
| &fe->dpcm[SNDRV_PCM_STREAM_PLAYBACK].be_clients; |
| |
| list_for_each_entry(dpcm, clients, list_be) { |
| |
| struct snd_soc_pcm_runtime *be = dpcm->be; |
| struct snd_soc_dai *dai = be->codec_dai; |
| struct snd_soc_dai_driver *drv = dai->driver; |
| |
| if (be->dai_link->ignore_suspend) |
| continue; |
| |
| dev_dbg(be->dev, "ASoC: BE digital mute %s\n", be->dai_link->name); |
| |
| if (drv->ops && drv->ops->digital_mute && dai->playback_active) |
| drv->ops->digital_mute(dai, mute); |
| } |
| |
| return 0; |
| } |
| |
| static int dpcm_fe_dai_open(struct snd_pcm_substream *fe_substream) |
| { |
| struct snd_soc_pcm_runtime *fe = fe_substream->private_data; |
| struct snd_soc_dpcm *dpcm; |
| struct snd_soc_dapm_widget_list *list; |
| int ret; |
| int stream = fe_substream->stream; |
| |
| mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME); |
| fe->dpcm[stream].runtime = fe_substream->runtime; |
| |
| if (dpcm_path_get(fe, stream, &list) <= 0) { |
| dev_dbg(fe->dev, "ASoC: %s no valid %s route\n", |
| fe->dai_link->name, stream ? "capture" : "playback"); |
| } |
| |
| /* calculate valid and active FE <-> BE dpcms */ |
| dpcm_process_paths(fe, stream, &list, 1); |
| |
| ret = dpcm_fe_dai_startup(fe_substream); |
| if (ret < 0) { |
| /* clean up all links */ |
| list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) |
| dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE; |
| |
| dpcm_be_disconnect(fe, stream); |
| fe->dpcm[stream].runtime = NULL; |
| } |
| |
| dpcm_clear_pending_state(fe, stream); |
| dpcm_path_put(&list); |
| mutex_unlock(&fe->card->mutex); |
| return ret; |
| } |
| |
| static int dpcm_fe_dai_close(struct snd_pcm_substream *fe_substream) |
| { |
| struct snd_soc_pcm_runtime *fe = fe_substream->private_data; |
| struct snd_soc_dpcm *dpcm; |
| int stream = fe_substream->stream, ret; |
| |
| mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME); |
| ret = dpcm_fe_dai_shutdown(fe_substream); |
| |
| /* mark FE's links ready to prune */ |
| list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) |
| dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE; |
| |
| dpcm_be_disconnect(fe, stream); |
| |
| fe->dpcm[stream].runtime = NULL; |
| mutex_unlock(&fe->card->mutex); |
| return ret; |
| } |
| |
| /* create a new pcm */ |
| int soc_new_pcm(struct snd_soc_pcm_runtime *rtd, int num) |
| { |
| struct snd_soc_platform *platform = rtd->platform; |
| struct snd_soc_dai *codec_dai = rtd->codec_dai; |
| struct snd_soc_dai *cpu_dai = rtd->cpu_dai; |
| struct snd_pcm *pcm; |
| char new_name[64]; |
| int ret = 0, playback = 0, capture = 0; |
| |
| if (rtd->dai_link->dynamic || rtd->dai_link->no_pcm) { |
| playback = rtd->dai_link->dpcm_playback; |
| capture = rtd->dai_link->dpcm_capture; |
| } else { |
| if (codec_dai->driver->playback.channels_min && |
| cpu_dai->driver->playback.channels_min) |
| playback = 1; |
| if (codec_dai->driver->capture.channels_min && |
| cpu_dai->driver->capture.channels_min) |
| capture = 1; |
| } |
| |
| if (rtd->dai_link->playback_only) { |
| playback = 1; |
| capture = 0; |
| } |
| |
| if (rtd->dai_link->capture_only) { |
| playback = 0; |
| capture = 1; |
| } |
| |
| /* create the PCM */ |
| if (rtd->dai_link->no_pcm) { |
| snprintf(new_name, sizeof(new_name), "(%s)", |
| rtd->dai_link->stream_name); |
| |
| ret = snd_pcm_new_internal(rtd->card->snd_card, new_name, num, |
| playback, capture, &pcm); |
| } else { |
| if (rtd->dai_link->dynamic) |
| snprintf(new_name, sizeof(new_name), "%s (*)", |
| rtd->dai_link->stream_name); |
| else |
| snprintf(new_name, sizeof(new_name), "%s %s-%d", |
| rtd->dai_link->stream_name, codec_dai->name, num); |
| |
| ret = snd_pcm_new(rtd->card->snd_card, new_name, num, playback, |
| capture, &pcm); |
| } |
| if (ret < 0) { |
| dev_err(rtd->card->dev, "ASoC: can't create pcm for %s\n", |
| rtd->dai_link->name); |
| return ret; |
| } |
| dev_dbg(rtd->card->dev, "ASoC: registered pcm #%d %s\n",num, new_name); |
| |
| /* DAPM dai link stream work */ |
| INIT_DELAYED_WORK(&rtd->delayed_work, close_delayed_work); |
| |
| rtd->pcm = pcm; |
| pcm->private_data = rtd; |
| |
| if (rtd->dai_link->no_pcm) { |
| if (playback) |
| pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream->private_data = rtd; |
| if (capture) |
| pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream->private_data = rtd; |
| goto out; |
| } |
| |
| /* ASoC PCM operations */ |
| if (rtd->dai_link->dynamic) { |
| rtd->ops.open = dpcm_fe_dai_open; |
| rtd->ops.hw_params = dpcm_fe_dai_hw_params; |
| rtd->ops.prepare = dpcm_fe_dai_prepare; |
| rtd->ops.trigger = dpcm_fe_dai_trigger; |
| rtd->ops.hw_free = dpcm_fe_dai_hw_free; |
| rtd->ops.close = dpcm_fe_dai_close; |
| rtd->ops.pointer = soc_pcm_pointer; |
| rtd->ops.ioctl = soc_pcm_ioctl; |
| } else { |
| rtd->ops.open = soc_pcm_open; |
| rtd->ops.hw_params = soc_pcm_hw_params; |
| rtd->ops.prepare = soc_pcm_prepare; |
| rtd->ops.trigger = soc_pcm_trigger; |
| rtd->ops.hw_free = soc_pcm_hw_free; |
| rtd->ops.close = soc_pcm_close; |
| rtd->ops.pointer = soc_pcm_pointer; |
| rtd->ops.ioctl = soc_pcm_ioctl; |
| } |
| |
| if (platform->driver->ops) { |
| rtd->ops.ack = platform->driver->ops->ack; |
| rtd->ops.copy = platform->driver->ops->copy; |
| rtd->ops.silence = platform->driver->ops->silence; |
| rtd->ops.page = platform->driver->ops->page; |
| rtd->ops.mmap = platform->driver->ops->mmap; |
| } |
| |
| if (playback) |
| snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &rtd->ops); |
| |
| if (capture) |
| snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &rtd->ops); |
| |
| if (platform->driver->pcm_new) { |
| ret = platform->driver->pcm_new(rtd); |
| if (ret < 0) { |
| dev_err(platform->dev, |
| "ASoC: pcm constructor failed: %d\n", |
| ret); |
| return ret; |
| } |
| } |
| |
| pcm->private_free = platform->driver->pcm_free; |
| out: |
| dev_info(rtd->card->dev, "%s <-> %s mapping ok\n", codec_dai->name, |
| cpu_dai->name); |
| return ret; |
| } |
| |
| /* is the current PCM operation for this FE ? */ |
| int snd_soc_dpcm_fe_can_update(struct snd_soc_pcm_runtime *fe, int stream) |
| { |
| if (fe->dpcm[stream].runtime_update == SND_SOC_DPCM_UPDATE_FE) |
| return 1; |
| return 0; |
| } |
| EXPORT_SYMBOL_GPL(snd_soc_dpcm_fe_can_update); |
| |
| /* is the current PCM operation for this BE ? */ |
| int snd_soc_dpcm_be_can_update(struct snd_soc_pcm_runtime *fe, |
| struct snd_soc_pcm_runtime *be, int stream) |
| { |
| if ((fe->dpcm[stream].runtime_update == SND_SOC_DPCM_UPDATE_FE) || |
| ((fe->dpcm[stream].runtime_update == SND_SOC_DPCM_UPDATE_BE) && |
| be->dpcm[stream].runtime_update)) |
| return 1; |
| return 0; |
| } |
| EXPORT_SYMBOL_GPL(snd_soc_dpcm_be_can_update); |
| |
| /* get the substream for this BE */ |
| struct snd_pcm_substream * |
| snd_soc_dpcm_get_substream(struct snd_soc_pcm_runtime *be, int stream) |
| { |
| return be->pcm->streams[stream].substream; |
| } |
| EXPORT_SYMBOL_GPL(snd_soc_dpcm_get_substream); |
| |
| /* get the BE runtime state */ |
| enum snd_soc_dpcm_state |
| snd_soc_dpcm_be_get_state(struct snd_soc_pcm_runtime *be, int stream) |
| { |
| return be->dpcm[stream].state; |
| } |
| EXPORT_SYMBOL_GPL(snd_soc_dpcm_be_get_state); |
| |
| /* set the BE runtime state */ |
| void snd_soc_dpcm_be_set_state(struct snd_soc_pcm_runtime *be, |
| int stream, enum snd_soc_dpcm_state state) |
| { |
| be->dpcm[stream].state = state; |
| } |
| EXPORT_SYMBOL_GPL(snd_soc_dpcm_be_set_state); |
| |
| /* |
| * We can only hw_free, stop, pause or suspend a BE DAI if any of it's FE |
| * are not running, paused or suspended for the specified stream direction. |
| */ |
| int snd_soc_dpcm_can_be_free_stop(struct snd_soc_pcm_runtime *fe, |
| struct snd_soc_pcm_runtime *be, int stream) |
| { |
| struct snd_soc_dpcm *dpcm; |
| int state; |
| |
| list_for_each_entry(dpcm, &be->dpcm[stream].fe_clients, list_fe) { |
| |
| if (dpcm->fe == fe) |
| continue; |
| |
| state = dpcm->fe->dpcm[stream].state; |
| if (state == SND_SOC_DPCM_STATE_START || |
| state == SND_SOC_DPCM_STATE_PAUSED || |
| state == SND_SOC_DPCM_STATE_SUSPEND) |
| return 0; |
| } |
| |
| /* it's safe to free/stop this BE DAI */ |
| return 1; |
| } |
| EXPORT_SYMBOL_GPL(snd_soc_dpcm_can_be_free_stop); |
| |
| /* |
| * We can only change hw params a BE DAI if any of it's FE are not prepared, |
| * running, paused or suspended for the specified stream direction. |
| */ |
| int snd_soc_dpcm_can_be_params(struct snd_soc_pcm_runtime *fe, |
| struct snd_soc_pcm_runtime *be, int stream) |
| { |
| struct snd_soc_dpcm *dpcm; |
| int state; |
| |
| list_for_each_entry(dpcm, &be->dpcm[stream].fe_clients, list_fe) { |
| |
| if (dpcm->fe == fe) |
| continue; |
| |
| state = dpcm->fe->dpcm[stream].state; |
| if (state == SND_SOC_DPCM_STATE_START || |
| state == SND_SOC_DPCM_STATE_PAUSED || |
| state == SND_SOC_DPCM_STATE_SUSPEND || |
| state == SND_SOC_DPCM_STATE_PREPARE) |
| return 0; |
| } |
| |
| /* it's safe to change hw_params */ |
| return 1; |
| } |
| EXPORT_SYMBOL_GPL(snd_soc_dpcm_can_be_params); |
| |
| int snd_soc_platform_trigger(struct snd_pcm_substream *substream, |
| int cmd, struct snd_soc_platform *platform) |
| { |
| if (platform->driver->ops && platform->driver->ops->trigger) |
| return platform->driver->ops->trigger(substream, cmd); |
| return 0; |
| } |
| EXPORT_SYMBOL_GPL(snd_soc_platform_trigger); |
| |
| #ifdef CONFIG_DEBUG_FS |
| static char *dpcm_state_string(enum snd_soc_dpcm_state state) |
| { |
| switch (state) { |
| case SND_SOC_DPCM_STATE_NEW: |
| return "new"; |
| case SND_SOC_DPCM_STATE_OPEN: |
| return "open"; |
| case SND_SOC_DPCM_STATE_HW_PARAMS: |
| return "hw_params"; |
| case SND_SOC_DPCM_STATE_PREPARE: |
| return "prepare"; |
| case SND_SOC_DPCM_STATE_START: |
| return "start"; |
| case SND_SOC_DPCM_STATE_STOP: |
| return "stop"; |
| case SND_SOC_DPCM_STATE_SUSPEND: |
| return "suspend"; |
| case SND_SOC_DPCM_STATE_PAUSED: |
| return "paused"; |
| case SND_SOC_DPCM_STATE_HW_FREE: |
| return "hw_free"; |
| case SND_SOC_DPCM_STATE_CLOSE: |
| return "close"; |
| } |
| |
| return "unknown"; |
| } |
| |
| static ssize_t dpcm_show_state(struct snd_soc_pcm_runtime *fe, |
| int stream, char *buf, size_t size) |
| { |
| struct snd_pcm_hw_params *params = &fe->dpcm[stream].hw_params; |
| struct snd_soc_dpcm *dpcm; |
| ssize_t offset = 0; |
| |
| /* FE state */ |
| offset += snprintf(buf + offset, size - offset, |
| "[%s - %s]\n", fe->dai_link->name, |
| stream ? "Capture" : "Playback"); |
| |
| offset += snprintf(buf + offset, size - offset, "State: %s\n", |
| dpcm_state_string(fe->dpcm[stream].state)); |
| |
| if ((fe->dpcm[stream].state >= SND_SOC_DPCM_STATE_HW_PARAMS) && |
| (fe->dpcm[stream].state <= SND_SOC_DPCM_STATE_STOP)) |
| offset += snprintf(buf + offset, size - offset, |
| "Hardware Params: " |
| "Format = %s, Channels = %d, Rate = %d\n", |
| snd_pcm_format_name(params_format(params)), |
| params_channels(params), |
| params_rate(params)); |
| |
| /* BEs state */ |
| offset += snprintf(buf + offset, size - offset, "Backends:\n"); |
| |
| if (list_empty(&fe->dpcm[stream].be_clients)) { |
| offset += snprintf(buf + offset, size - offset, |
| " No active DSP links\n"); |
| goto out; |
| } |
| |
| list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) { |
| struct snd_soc_pcm_runtime *be = dpcm->be; |
| params = &dpcm->hw_params; |
| |
| offset += snprintf(buf + offset, size - offset, |
| "- %s\n", be->dai_link->name); |
| |
| offset += snprintf(buf + offset, size - offset, |
| " State: %s\n", |
| dpcm_state_string(be->dpcm[stream].state)); |
| |
| if ((be->dpcm[stream].state >= SND_SOC_DPCM_STATE_HW_PARAMS) && |
| (be->dpcm[stream].state <= SND_SOC_DPCM_STATE_STOP)) |
| offset += snprintf(buf + offset, size - offset, |
| " Hardware Params: " |
| "Format = %s, Channels = %d, Rate = %d\n", |
| snd_pcm_format_name(params_format(params)), |
| params_channels(params), |
| params_rate(params)); |
| } |
| |
| out: |
| return offset; |
| } |
| |
| static ssize_t dpcm_state_read_file(struct file *file, char __user *user_buf, |
| size_t count, loff_t *ppos) |
| { |
| struct snd_soc_pcm_runtime *fe = file->private_data; |
| ssize_t out_count = PAGE_SIZE, offset = 0, ret = 0; |
| char *buf; |
| |
| buf = kmalloc(out_count, GFP_KERNEL); |
| if (!buf) |
| return -ENOMEM; |
| |
| if (fe->cpu_dai->driver->playback.channels_min) |
| offset += dpcm_show_state(fe, SNDRV_PCM_STREAM_PLAYBACK, |
| buf + offset, out_count - offset); |
| |
| if (fe->cpu_dai->driver->capture.channels_min) |
| offset += dpcm_show_state(fe, SNDRV_PCM_STREAM_CAPTURE, |
| buf + offset, out_count - offset); |
| |
| ret = simple_read_from_buffer(user_buf, count, ppos, buf, offset); |
| |
| kfree(buf); |
| return ret; |
| } |
| |
| static const struct file_operations dpcm_state_fops = { |
| .open = simple_open, |
| .read = dpcm_state_read_file, |
| .llseek = default_llseek, |
| }; |
| |
| int soc_dpcm_debugfs_add(struct snd_soc_pcm_runtime *rtd) |
| { |
| if (!rtd->dai_link) |
| return 0; |
| |
| rtd->debugfs_dpcm_root = debugfs_create_dir(rtd->dai_link->name, |
| rtd->card->debugfs_card_root); |
| if (!rtd->debugfs_dpcm_root) { |
| dev_dbg(rtd->dev, |
| "ASoC: Failed to create dpcm debugfs directory %s\n", |
| rtd->dai_link->name); |
| return -EINVAL; |
| } |
| |
| rtd->debugfs_dpcm_state = debugfs_create_file("state", 0444, |
| rtd->debugfs_dpcm_root, |
| rtd, &dpcm_state_fops); |
| |
| return 0; |
| } |
| #endif |