diff options
Diffstat (limited to 'sound/soc/soc-compress.c')
| -rw-r--r-- | sound/soc/soc-compress.c | 672 |
1 files changed, 672 insertions, 0 deletions
diff --git a/sound/soc/soc-compress.c b/sound/soc/soc-compress.c new file mode 100644 index 000000000..d649b0cf4 --- /dev/null +++ b/sound/soc/soc-compress.c @@ -0,0 +1,672 @@ +// SPDX-License-Identifier: GPL-2.0+ +// +// soc-compress.c -- ALSA SoC Compress +// +// Copyright (C) 2012 Intel Corp. +// +// Authors: Namarta Kohli <namartax.kohli@intel.com> +// Ramesh Babu K V <ramesh.babu@linux.intel.com> +// Vinod Koul <vinod.koul@linux.intel.com> + +#include <linux/kernel.h> +#include <linux/init.h> +#include <linux/delay.h> +#include <linux/slab.h> +#include <linux/workqueue.h> +#include <sound/core.h> +#include <sound/compress_params.h> +#include <sound/compress_driver.h> +#include <sound/soc.h> +#include <sound/initval.h> +#include <sound/soc-dpcm.h> +#include <sound/soc-link.h> +#include <linux/pm_runtime.h> + +static int snd_soc_compr_components_open(struct snd_compr_stream *cstream) +{ + struct snd_soc_pcm_runtime *rtd = cstream->private_data; + struct snd_soc_component *component; + int ret = 0; + int i; + + for_each_rtd_components(rtd, i, component) { + ret = snd_soc_component_module_get_when_open(component, cstream); + if (ret < 0) + break; + + ret = snd_soc_component_compr_open(component, cstream); + if (ret < 0) + break; + } + + return ret; +} + +static void snd_soc_compr_components_free(struct snd_compr_stream *cstream, + int rollback) +{ + struct snd_soc_pcm_runtime *rtd = cstream->private_data; + struct snd_soc_component *component; + int i; + + for_each_rtd_components(rtd, i, component) { + snd_soc_component_compr_free(component, cstream, rollback); + snd_soc_component_module_put_when_close(component, cstream, rollback); + } +} + +static int soc_compr_clean(struct snd_compr_stream *cstream, int rollback) +{ + struct snd_soc_pcm_runtime *rtd = cstream->private_data; + struct snd_soc_dai *cpu_dai = asoc_rtd_to_cpu(rtd, 0); + struct snd_soc_dai *codec_dai = asoc_rtd_to_codec(rtd, 0); + int stream = cstream->direction; /* SND_COMPRESS_xxx is same as SNDRV_PCM_STREAM_xxx */ + + mutex_lock_nested(&rtd->card->pcm_mutex, rtd->card->pcm_subclass); + + if (!rollback) + snd_soc_runtime_deactivate(rtd, stream); + + snd_soc_dai_digital_mute(codec_dai, 1, stream); + + if (!snd_soc_dai_active(cpu_dai)) + cpu_dai->rate = 0; + + if (!snd_soc_dai_active(codec_dai)) + codec_dai->rate = 0; + + snd_soc_link_compr_shutdown(cstream, rollback); + + snd_soc_compr_components_free(cstream, rollback); + + snd_soc_dai_compr_shutdown(cpu_dai, cstream, rollback); + + if (!rollback) + snd_soc_dapm_stream_stop(rtd, stream); + + mutex_unlock(&rtd->card->pcm_mutex); + + snd_soc_pcm_component_pm_runtime_put(rtd, cstream, rollback); + + return 0; +} + +static int soc_compr_free(struct snd_compr_stream *cstream) +{ + return soc_compr_clean(cstream, 0); +} + +static int soc_compr_open(struct snd_compr_stream *cstream) +{ + struct snd_soc_pcm_runtime *rtd = cstream->private_data; + struct snd_soc_dai *cpu_dai = asoc_rtd_to_cpu(rtd, 0); + int stream = cstream->direction; /* SND_COMPRESS_xxx is same as SNDRV_PCM_STREAM_xxx */ + int ret; + + ret = snd_soc_pcm_component_pm_runtime_get(rtd, cstream); + if (ret < 0) + goto err_no_lock; + + mutex_lock_nested(&rtd->card->pcm_mutex, rtd->card->pcm_subclass); + + ret = snd_soc_dai_compr_startup(cpu_dai, cstream); + if (ret < 0) + goto err; + + ret = snd_soc_compr_components_open(cstream); + if (ret < 0) + goto err; + + ret = snd_soc_link_compr_startup(cstream); + if (ret < 0) + goto err; + + snd_soc_runtime_activate(rtd, stream); +err: + mutex_unlock(&rtd->card->pcm_mutex); +err_no_lock: + if (ret < 0) + soc_compr_clean(cstream, 1); + + return ret; +} + +static int soc_compr_open_fe(struct snd_compr_stream *cstream) +{ + struct snd_soc_pcm_runtime *fe = cstream->private_data; + struct snd_pcm_substream *fe_substream = + fe->pcm->streams[cstream->direction].substream; + struct snd_soc_dai *cpu_dai = asoc_rtd_to_cpu(fe, 0); + struct snd_soc_dpcm *dpcm; + struct snd_soc_dapm_widget_list *list; + int stream = cstream->direction; /* SND_COMPRESS_xxx is same as SNDRV_PCM_STREAM_xxx */ + int ret; + + mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME); + fe->dpcm[stream].runtime = fe_substream->runtime; + + ret = dpcm_path_get(fe, stream, &list); + if (ret < 0) + goto be_err; + + mutex_lock_nested(&fe->card->pcm_mutex, fe->card->pcm_subclass); + + /* calculate valid and active FE <-> BE dpcms */ + dpcm_process_paths(fe, stream, &list, 1); + fe->dpcm[stream].runtime = fe_substream->runtime; + + fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_FE; + + ret = dpcm_be_dai_startup(fe, stream); + if (ret < 0) { + /* clean up all links */ + for_each_dpcm_be(fe, stream, dpcm) + dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE; + + dpcm_be_disconnect(fe, stream); + fe->dpcm[stream].runtime = NULL; + goto out; + } + + ret = snd_soc_dai_compr_startup(cpu_dai, cstream); + if (ret < 0) + goto out; + + ret = snd_soc_compr_components_open(cstream); + if (ret < 0) + goto open_err; + + ret = snd_soc_link_compr_startup(cstream); + if (ret < 0) + goto machine_err; + + dpcm_clear_pending_state(fe, stream); + dpcm_path_put(&list); + + fe->dpcm[stream].state = SND_SOC_DPCM_STATE_OPEN; + fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_NO; + + snd_soc_runtime_activate(fe, stream); + mutex_unlock(&fe->card->pcm_mutex); + + mutex_unlock(&fe->card->mutex); + + return 0; + +machine_err: + snd_soc_compr_components_free(cstream, 1); +open_err: + snd_soc_dai_compr_shutdown(cpu_dai, cstream, 1); +out: + dpcm_path_put(&list); +be_err: + fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_NO; + mutex_unlock(&fe->card->mutex); + return ret; +} + +static int soc_compr_free_fe(struct snd_compr_stream *cstream) +{ + struct snd_soc_pcm_runtime *fe = cstream->private_data; + struct snd_soc_dai *cpu_dai = asoc_rtd_to_cpu(fe, 0); + struct snd_soc_dpcm *dpcm; + int stream = cstream->direction; /* SND_COMPRESS_xxx is same as SNDRV_PCM_STREAM_xxx */ + + mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME); + + mutex_lock_nested(&fe->card->pcm_mutex, fe->card->pcm_subclass); + snd_soc_runtime_deactivate(fe, stream); + + fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_FE; + + dpcm_be_dai_hw_free(fe, stream); + + dpcm_be_dai_shutdown(fe, stream); + + /* mark FE's links ready to prune */ + for_each_dpcm_be(fe, stream, dpcm) + dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE; + + 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; + + dpcm_be_disconnect(fe, stream); + + mutex_unlock(&fe->card->pcm_mutex); + + fe->dpcm[stream].runtime = NULL; + + snd_soc_link_compr_shutdown(cstream, 0); + + snd_soc_compr_components_free(cstream, 0); + + snd_soc_dai_compr_shutdown(cpu_dai, cstream, 0); + + mutex_unlock(&fe->card->mutex); + return 0; +} + +static int soc_compr_trigger(struct snd_compr_stream *cstream, int cmd) +{ + struct snd_soc_pcm_runtime *rtd = cstream->private_data; + struct snd_soc_dai *codec_dai = asoc_rtd_to_codec(rtd, 0); + struct snd_soc_dai *cpu_dai = asoc_rtd_to_cpu(rtd, 0); + int stream = cstream->direction; /* SND_COMPRESS_xxx is same as SNDRV_PCM_STREAM_xxx */ + int ret; + + mutex_lock_nested(&rtd->card->pcm_mutex, rtd->card->pcm_subclass); + + ret = snd_soc_component_compr_trigger(cstream, cmd); + if (ret < 0) + goto out; + + ret = snd_soc_dai_compr_trigger(cpu_dai, cstream, cmd); + if (ret < 0) + goto out; + + switch (cmd) { + case SNDRV_PCM_TRIGGER_START: + snd_soc_dai_digital_mute(codec_dai, 0, stream); + break; + case SNDRV_PCM_TRIGGER_STOP: + snd_soc_dai_digital_mute(codec_dai, 1, stream); + break; + } + +out: + mutex_unlock(&rtd->card->pcm_mutex); + return ret; +} + +static int soc_compr_trigger_fe(struct snd_compr_stream *cstream, int cmd) +{ + struct snd_soc_pcm_runtime *fe = cstream->private_data; + struct snd_soc_dai *cpu_dai = asoc_rtd_to_cpu(fe, 0); + int stream = cstream->direction; /* SND_COMPRESS_xxx is same as SNDRV_PCM_STREAM_xxx */ + int ret; + + if (cmd == SND_COMPR_TRIGGER_PARTIAL_DRAIN || + cmd == SND_COMPR_TRIGGER_DRAIN) + return snd_soc_component_compr_trigger(cstream, cmd); + + mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME); + + ret = snd_soc_dai_compr_trigger(cpu_dai, cstream, cmd); + if (ret < 0) + goto out; + + ret = snd_soc_component_compr_trigger(cstream, cmd); + if (ret < 0) + goto out; + + fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_FE; + + ret = dpcm_be_dai_trigger(fe, stream, cmd); + + 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: + fe->dpcm[stream].state = SND_SOC_DPCM_STATE_STOP; + break; + case SNDRV_PCM_TRIGGER_PAUSE_PUSH: + fe->dpcm[stream].state = SND_SOC_DPCM_STATE_PAUSED; + break; + } + +out: + fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_NO; + mutex_unlock(&fe->card->mutex); + return ret; +} + +static int soc_compr_set_params(struct snd_compr_stream *cstream, + struct snd_compr_params *params) +{ + struct snd_soc_pcm_runtime *rtd = cstream->private_data; + struct snd_soc_dai *cpu_dai = asoc_rtd_to_cpu(rtd, 0); + int stream = cstream->direction; /* SND_COMPRESS_xxx is same as SNDRV_PCM_STREAM_xxx */ + int ret; + + mutex_lock_nested(&rtd->card->pcm_mutex, rtd->card->pcm_subclass); + + /* + * First we call set_params for the CPU DAI, then the component + * driver this should configure the SoC side. If the machine has + * compressed ops then we call that as well. The expectation is + * that these callbacks will configure everything for this compress + * path, like configuring a PCM port for a CODEC. + */ + ret = snd_soc_dai_compr_set_params(cpu_dai, cstream, params); + if (ret < 0) + goto err; + + ret = snd_soc_component_compr_set_params(cstream, params); + if (ret < 0) + goto err; + + ret = snd_soc_link_compr_set_params(cstream); + if (ret < 0) + goto err; + + snd_soc_dapm_stream_event(rtd, stream, SND_SOC_DAPM_STREAM_START); + + /* cancel any delayed stream shutdown that is pending */ + rtd->pop_wait = 0; + mutex_unlock(&rtd->card->pcm_mutex); + + cancel_delayed_work_sync(&rtd->delayed_work); + + return 0; + +err: + mutex_unlock(&rtd->card->pcm_mutex); + return ret; +} + +static int soc_compr_set_params_fe(struct snd_compr_stream *cstream, + struct snd_compr_params *params) +{ + struct snd_soc_pcm_runtime *fe = cstream->private_data; + struct snd_pcm_substream *fe_substream = + fe->pcm->streams[cstream->direction].substream; + struct snd_soc_dai *cpu_dai = asoc_rtd_to_cpu(fe, 0); + int stream = cstream->direction; /* SND_COMPRESS_xxx is same as SNDRV_PCM_STREAM_xxx */ + int ret; + + mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME); + + /* + * Create an empty hw_params for the BE as the machine driver must + * fix this up to match DSP decoder and ASRC configuration. + * I.e. machine driver fixup for compressed BE is mandatory. + */ + memset(&fe->dpcm[fe_substream->stream].hw_params, 0, + sizeof(struct snd_pcm_hw_params)); + + fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_FE; + + ret = dpcm_be_dai_hw_params(fe, stream); + if (ret < 0) + goto out; + + ret = dpcm_be_dai_prepare(fe, stream); + if (ret < 0) + goto out; + + ret = snd_soc_dai_compr_set_params(cpu_dai, cstream, params); + if (ret < 0) + goto out; + + ret = snd_soc_component_compr_set_params(cstream, params); + if (ret < 0) + goto out; + + ret = snd_soc_link_compr_set_params(cstream); + if (ret < 0) + goto out; + mutex_lock_nested(&fe->card->pcm_mutex, fe->card->pcm_subclass); + dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_START); + mutex_unlock(&fe->card->pcm_mutex); + 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_compr_get_params(struct snd_compr_stream *cstream, + struct snd_codec *params) +{ + struct snd_soc_pcm_runtime *rtd = cstream->private_data; + struct snd_soc_dai *cpu_dai = asoc_rtd_to_cpu(rtd, 0); + int ret = 0; + + mutex_lock_nested(&rtd->card->pcm_mutex, rtd->card->pcm_subclass); + + ret = snd_soc_dai_compr_get_params(cpu_dai, cstream, params); + if (ret < 0) + goto err; + + ret = snd_soc_component_compr_get_params(cstream, params); +err: + mutex_unlock(&rtd->card->pcm_mutex); + return ret; +} + +static int soc_compr_ack(struct snd_compr_stream *cstream, size_t bytes) +{ + struct snd_soc_pcm_runtime *rtd = cstream->private_data; + struct snd_soc_dai *cpu_dai = asoc_rtd_to_cpu(rtd, 0); + int ret; + + mutex_lock_nested(&rtd->card->pcm_mutex, rtd->card->pcm_subclass); + + ret = snd_soc_dai_compr_ack(cpu_dai, cstream, bytes); + if (ret < 0) + goto err; + + ret = snd_soc_component_compr_ack(cstream, bytes); +err: + mutex_unlock(&rtd->card->pcm_mutex); + return ret; +} + +static int soc_compr_pointer(struct snd_compr_stream *cstream, + struct snd_compr_tstamp *tstamp) +{ + struct snd_soc_pcm_runtime *rtd = cstream->private_data; + int ret; + struct snd_soc_dai *cpu_dai = asoc_rtd_to_cpu(rtd, 0); + + mutex_lock_nested(&rtd->card->pcm_mutex, rtd->card->pcm_subclass); + + ret = snd_soc_dai_compr_pointer(cpu_dai, cstream, tstamp); + if (ret < 0) + goto out; + + ret = snd_soc_component_compr_pointer(cstream, tstamp); +out: + mutex_unlock(&rtd->card->pcm_mutex); + return ret; +} + +static int soc_compr_set_metadata(struct snd_compr_stream *cstream, + struct snd_compr_metadata *metadata) +{ + struct snd_soc_pcm_runtime *rtd = cstream->private_data; + struct snd_soc_dai *cpu_dai = asoc_rtd_to_cpu(rtd, 0); + int ret; + + ret = snd_soc_dai_compr_set_metadata(cpu_dai, cstream, metadata); + if (ret < 0) + return ret; + + return snd_soc_component_compr_set_metadata(cstream, metadata); +} + +static int soc_compr_get_metadata(struct snd_compr_stream *cstream, + struct snd_compr_metadata *metadata) +{ + struct snd_soc_pcm_runtime *rtd = cstream->private_data; + struct snd_soc_dai *cpu_dai = asoc_rtd_to_cpu(rtd, 0); + int ret; + + ret = snd_soc_dai_compr_get_metadata(cpu_dai, cstream, metadata); + if (ret < 0) + return ret; + + return snd_soc_component_compr_get_metadata(cstream, metadata); +} + +/* ASoC Compress operations */ +static struct snd_compr_ops soc_compr_ops = { + .open = soc_compr_open, + .free = soc_compr_free, + .set_params = soc_compr_set_params, + .set_metadata = soc_compr_set_metadata, + .get_metadata = soc_compr_get_metadata, + .get_params = soc_compr_get_params, + .trigger = soc_compr_trigger, + .pointer = soc_compr_pointer, + .ack = soc_compr_ack, + .get_caps = snd_soc_component_compr_get_caps, + .get_codec_caps = snd_soc_component_compr_get_codec_caps, +}; + +/* ASoC Dynamic Compress operations */ +static struct snd_compr_ops soc_compr_dyn_ops = { + .open = soc_compr_open_fe, + .free = soc_compr_free_fe, + .set_params = soc_compr_set_params_fe, + .get_params = soc_compr_get_params, + .set_metadata = soc_compr_set_metadata, + .get_metadata = soc_compr_get_metadata, + .trigger = soc_compr_trigger_fe, + .pointer = soc_compr_pointer, + .ack = soc_compr_ack, + .get_caps = snd_soc_component_compr_get_caps, + .get_codec_caps = snd_soc_component_compr_get_codec_caps, +}; + +/** + * snd_soc_new_compress - create a new compress. + * + * @rtd: The runtime for which we will create compress + * @num: the device index number (zero based - shared with normal PCMs) + * + * Return: 0 for success, else error. + */ +int snd_soc_new_compress(struct snd_soc_pcm_runtime *rtd, int num) +{ + struct snd_soc_component *component; + struct snd_soc_dai *codec_dai = asoc_rtd_to_codec(rtd, 0); + struct snd_soc_dai *cpu_dai = asoc_rtd_to_cpu(rtd, 0); + struct snd_compr *compr; + struct snd_pcm *be_pcm; + char new_name[64]; + int ret = 0, direction = 0; + int playback = 0, capture = 0; + int i; + + /* + * make sure these are same value, + * and then use these as equally + */ + BUILD_BUG_ON((int)SNDRV_PCM_STREAM_PLAYBACK != (int)SND_COMPRESS_PLAYBACK); + BUILD_BUG_ON((int)SNDRV_PCM_STREAM_CAPTURE != (int)SND_COMPRESS_CAPTURE); + + if (rtd->dai_link->num_cpus > 1 || + rtd->dai_link->num_codecs > 1) { + dev_err(rtd->card->dev, + "Compress ASoC: Multi CPU/Codec not supported\n"); + return -EINVAL; + } + + if (!codec_dai) { + dev_err(rtd->card->dev, "Missing codec\n"); + return -EINVAL; + } + + /* check client and interface hw capabilities */ + if (snd_soc_dai_stream_valid(codec_dai, SNDRV_PCM_STREAM_PLAYBACK) && + snd_soc_dai_stream_valid(cpu_dai, SNDRV_PCM_STREAM_PLAYBACK)) + playback = 1; + if (snd_soc_dai_stream_valid(codec_dai, SNDRV_PCM_STREAM_CAPTURE) && + snd_soc_dai_stream_valid(cpu_dai, SNDRV_PCM_STREAM_CAPTURE)) + capture = 1; + + /* + * Compress devices are unidirectional so only one of the directions + * should be set, check for that (xor) + */ + if (playback + capture != 1) { + dev_err(rtd->card->dev, + "Compress ASoC: Invalid direction for P %d, C %d\n", + playback, capture); + return -EINVAL; + } + + if (playback) + direction = SND_COMPRESS_PLAYBACK; + else + direction = SND_COMPRESS_CAPTURE; + + compr = devm_kzalloc(rtd->card->dev, sizeof(*compr), GFP_KERNEL); + if (!compr) + return -ENOMEM; + + compr->ops = devm_kzalloc(rtd->card->dev, sizeof(soc_compr_ops), + GFP_KERNEL); + if (!compr->ops) + return -ENOMEM; + + if (rtd->dai_link->dynamic) { + snprintf(new_name, sizeof(new_name), "(%s)", + rtd->dai_link->stream_name); + + ret = snd_pcm_new_internal(rtd->card->snd_card, new_name, num, + rtd->dai_link->dpcm_playback, + rtd->dai_link->dpcm_capture, &be_pcm); + if (ret < 0) { + dev_err(rtd->card->dev, + "Compress ASoC: can't create compressed for %s: %d\n", + rtd->dai_link->name, ret); + return ret; + } + + /* inherit atomicity from DAI link */ + be_pcm->nonatomic = rtd->dai_link->nonatomic; + + rtd->pcm = be_pcm; + rtd->fe_compr = 1; + if (rtd->dai_link->dpcm_playback) + be_pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream->private_data = rtd; + if (rtd->dai_link->dpcm_capture) + be_pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream->private_data = rtd; + memcpy(compr->ops, &soc_compr_dyn_ops, sizeof(soc_compr_dyn_ops)); + } else { + snprintf(new_name, sizeof(new_name), "%s %s-%d", + rtd->dai_link->stream_name, codec_dai->name, num); + + memcpy(compr->ops, &soc_compr_ops, sizeof(soc_compr_ops)); + } + + for_each_rtd_components(rtd, i, component) { + if (!component->driver->compress_ops || + !component->driver->compress_ops->copy) + continue; + + compr->ops->copy = snd_soc_component_compr_copy; + break; + } + + ret = snd_compress_new(rtd->card->snd_card, num, direction, + new_name, compr); + if (ret < 0) { + component = asoc_rtd_to_codec(rtd, 0)->component; + dev_err(component->dev, + "Compress ASoC: can't create compress for codec %s: %d\n", + component->name, ret); + return ret; + } + + /* DAPM dai link stream work */ + rtd->close_delayed_work_func = snd_soc_close_delayed_work; + + rtd->compr = compr; + compr->private_data = rtd; + + dev_dbg(rtd->card->dev, "Compress ASoC: %s <-> %s mapping ok\n", + codec_dai->name, cpu_dai->name); + + return 0; +} +EXPORT_SYMBOL_GPL(snd_soc_new_compress); |