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soc-compress.c
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/* * 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> * * 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/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> static int soc_compr_open(struct snd_compr_stream *cstream) { struct snd_soc_pcm_runtime *rtd = cstream->private_data; struct snd_soc_platform *platform = rtd->platform; int ret = 0; mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass); if (platform->driver->compr_ops && platform->driver->compr_ops->open) { ret = platform->driver->compr_ops->open(cstream); if (ret < 0) { pr_err("compress asoc: can't open platform %s\n", platform->component.name); goto out; } } if (rtd->dai_link->compr_ops && rtd->dai_link->compr_ops->startup) { ret = rtd->dai_link->compr_ops->startup(cstream); if (ret < 0) { pr_err("compress asoc: %s startup failed\n", rtd->dai_link->name); goto machine_err; } } snd_soc_runtime_activate(rtd, cstream->direction); mutex_unlock(&rtd->pcm_mutex); return 0; machine_err: if (platform->driver->compr_ops && platform->driver->compr_ops->free) platform->driver->compr_ops->free(cstream); out: mutex_unlock(&rtd->pcm_mutex); 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[0].substream; struct snd_soc_platform *platform = fe->platform; struct snd_soc_dpcm *dpcm; struct snd_soc_dapm_widget_list *list; int stream; int ret = 0; if (cstream->direction == SND_COMPRESS_PLAYBACK) stream = SNDRV_PCM_STREAM_PLAYBACK; else stream = SNDRV_PCM_STREAM_CAPTURE; mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME); if (platform->driver->compr_ops && platform->driver->compr_ops->open) { ret = platform->driver->compr_ops->open(cstream); if (ret < 0) { pr_err("compress asoc: can't open platform %s\n", platform->component.name); goto out; } } if (fe->dai_link->compr_ops && fe->dai_link->compr_ops->startup) { ret = fe->dai_link->compr_ops->startup(cstream); if (ret < 0) { pr_err("compress asoc: %s startup failed\n", fe->dai_link->name); goto machine_err; } } fe->dpcm[stream].runtime = fe_substream->runtime; ret = dpcm_path_get(fe, stream, &list); if (ret < 0) { mutex_unlock(&fe->card->mutex); goto fe_err; } else if (ret == 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); fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_FE; ret = dpcm_be_dai_startup(fe, stream); 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; goto fe_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->mutex); return 0; fe_err: if (fe->dai_link->compr_ops && fe->dai_link->compr_ops->shutdown) fe->dai_link->compr_ops->shutdown(cstream); machine_err: if (platform->driver->compr_ops && platform->driver->compr_ops->free) platform->driver->compr_ops->free(cstream); out: fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_NO; mutex_unlock(&fe->card->mutex); 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); } static int soc_compr_free(struct snd_compr_stream *cstream) { struct snd_soc_pcm_runtime *rtd = cstream->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 stream; mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass); if (cstream->direction == SND_COMPRESS_PLAYBACK) stream = SNDRV_PCM_STREAM_PLAYBACK; else stream = SNDRV_PCM_STREAM_CAPTURE; snd_soc_runtime_deactivate(rtd, stream); snd_soc_dai_digital_mute(codec_dai, 1, cstream->direction); if (!cpu_dai->active) cpu_dai->rate = 0; if (!codec_dai->active) codec_dai->rate = 0; if (rtd->dai_link->compr_ops && rtd->dai_link->compr_ops->shutdown) rtd->dai_link->compr_ops->shutdown(cstream); if (platform->driver->compr_ops && platform->driver->compr_ops->free) platform->driver->compr_ops->free(cstream); if (cstream->direction == SND_COMPRESS_PLAYBACK) { if (snd_soc_runtime_ignore_pmdown_time(rtd)) { snd_soc_dapm_stream_event(rtd, SNDRV_PCM_STREAM_PLAYBACK, SND_SOC_DAPM_STREAM_STOP); } else { 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); return 0; } static int soc_compr_free_fe(struct snd_compr_stream *cstream) { struct snd_soc_pcm_runtime *fe = cstream->private_data; struct snd_soc_platform *platform = fe->platform; struct snd_soc_dpcm *dpcm; int stream, ret; mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME); if (cstream->direction == SND_COMPRESS_PLAYBACK) stream = SNDRV_PCM_STREAM_PLAYBACK; else stream = SNDRV_PCM_STREAM_CAPTURE; snd_soc_runtime_deactivate(fe, stream); fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_FE; ret = dpcm_be_dai_hw_free(fe, stream); if (ret < 0) dev_err(fe->dev, "compressed hw_free failed %d\n", ret); ret = dpcm_be_dai_shutdown(fe, stream); /* 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; if (stream == SNDRV_PCM_STREAM_PLAYBACK) dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_STOP); else 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); fe->dpcm[stream].runtime = NULL; if (fe->dai_link->compr_ops && fe->dai_link->compr_ops->shutdown) fe->dai_link->compr_ops->shutdown(cstream); if (platform->driver->compr_ops && platform->driver->compr_ops->free) platform->driver->compr_ops->free(cstream); 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_platform *platform = rtd->platform; struct snd_soc_dai *codec_dai = rtd->codec_dai; int ret = 0; mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass); if (platform->driver->compr_ops && platform->driver->compr_ops->trigger) { ret = platform->driver->compr_ops->trigger(cstream, cmd); if (ret < 0) goto out; } switch (cmd) { case SNDRV_PCM_TRIGGER_START: snd_soc_dai_digital_mute(codec_dai, 0, cstream->direction); break; case SNDRV_PCM_TRIGGER_STOP: snd_soc_dai_digital_mute(codec_dai, 1, cstream->direction); break; } out: mutex_unlock(&rtd->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_platform *platform = fe->platform; int ret = 0, stream; if (cmd == SND_COMPR_TRIGGER_PARTIAL_DRAIN || cmd == SND_COMPR_TRIGGER_DRAIN) { if (platform->driver->compr_ops && platform->driver->compr_ops->trigger) return platform->driver->compr_ops->trigger(cstream, cmd); } if (cstream->direction == SND_COMPRESS_PLAYBACK) stream = SNDRV_PCM_STREAM_PLAYBACK; else stream = SNDRV_PCM_STREAM_CAPTURE; mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME); if (platform->driver->compr_ops && platform->driver->compr_ops->trigger) { ret = platform->driver->compr_ops->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_platform *platform = rtd->platform; int ret = 0; mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass); /* first we call set_params for the platform driver * this should configure the soc side * if the machine has compressed ops then we call that as well * expectation is that platform and machine will configure everything * for this compress path, like configuring pcm port for codec */ if (platform->driver->compr_ops && platform->driver->compr_ops->set_params) { ret = platform->driver->compr_ops->set_params(cstream, params); if (ret < 0) goto err; } if (rtd->dai_link->compr_ops && rtd->dai_link->compr_ops->set_params) { ret = rtd->dai_link->compr_ops->set_params(cstream); if (ret < 0) goto err; } if (cstream->direction == SND_COMPRESS_PLAYBACK) snd_soc_dapm_stream_event(rtd, SNDRV_PCM_STREAM_PLAYBACK, SND_SOC_DAPM_STREAM_START); else snd_soc_dapm_stream_event(rtd, SNDRV_PCM_STREAM_CAPTURE, SND_SOC_DAPM_STREAM_START); /* cancel any delayed stream shutdown that is pending */ rtd->pop_wait = 0; mutex_unlock(&rtd->pcm_mutex); cancel_delayed_work_sync(&rtd->delayed_work); return ret; err: mutex_unlock(&rtd->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[0].substream; struct snd_soc_platform *platform = fe->platform; int ret = 0, stream; if (cstream->direction == SND_COMPRESS_PLAYBACK) stream = SNDRV_PCM_STREAM_PLAYBACK; else stream = SNDRV_PCM_STREAM_CAPTURE; mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME); if (platform->driver->compr_ops && platform->driver->compr_ops->set_params) { ret = platform->driver->compr_ops->set_params(cstream, params); if (ret < 0) goto out; } if (fe->dai_link->compr_ops && fe->dai_link->compr_ops->set_params) { ret = fe->dai_link->compr_ops->set_params(cstream); if (ret < 0) goto out; } /* * 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; if (stream == SNDRV_PCM_STREAM_PLAYBACK) dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_START); else 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_compr_get_params(struct snd_compr_stream *cstream, struct snd_codec *params) { struct snd_soc_pcm_runtime *rtd = cstream->private_data; struct snd_soc_platform *platform = rtd->platform; int ret = 0; mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass); if (platform->driver->compr_ops && platform->driver->compr_ops->get_params) ret = platform->driver->compr_ops->get_params(cstream, params); mutex_unlock(&rtd->pcm_mutex); return ret; } static int soc_compr_get_caps(struct snd_compr_stream *cstream, struct snd_compr_caps *caps) { struct snd_soc_pcm_runtime *rtd = cstream->private_data; struct snd_soc_platform *platform = rtd->platform; int ret = 0; mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass); if (platform->driver->compr_ops && platform->driver->compr_ops->get_caps) ret = platform->driver->compr_ops->get_caps(cstream, caps); mutex_unlock(&rtd->pcm_mutex); return ret; } static int soc_compr_get_codec_caps(struct snd_compr_stream *cstream, struct snd_compr_codec_caps *codec) { struct snd_soc_pcm_runtime *rtd = cstream->private_data; struct snd_soc_platform *platform = rtd->platform; int ret = 0; mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass); if (platform->driver->compr_ops && platform->driver->compr_ops->get_codec_caps) ret = platform->driver->compr_ops->get_codec_caps(cstream, codec); mutex_unlock(&rtd->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_platform *platform = rtd->platform; int ret = 0; mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass); if (platform->driver->compr_ops && platform->driver->compr_ops->ack) ret = platform->driver->compr_ops->ack(cstream, bytes); mutex_unlock(&rtd->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; struct snd_soc_platform *platform = rtd->platform; mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass); if (platform->driver->compr_ops && platform->driver->compr_ops->pointer) platform->driver->compr_ops->pointer(cstream, tstamp); mutex_unlock(&rtd->pcm_mutex); return 0; } static int soc_compr_copy(struct snd_compr_stream *cstream, char __user *buf, size_t count) { struct snd_soc_pcm_runtime *rtd = cstream->private_data; struct snd_soc_platform *platform = rtd->platform; int ret = 0; mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass); if (platform->driver->compr_ops && platform->driver->compr_ops->copy) ret = platform->driver->compr_ops->copy(cstream, buf, count); mutex_unlock(&rtd->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_platform *platform = rtd->platform; int ret = 0; if (platform->driver->compr_ops && platform->driver->compr_ops->set_metadata) ret = platform->driver->compr_ops->set_metadata(cstream, metadata); return ret; } 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_platform *platform = rtd->platform; int ret = 0; if (platform->driver->compr_ops && platform->driver->compr_ops->get_metadata) ret = platform->driver->compr_ops->get_metadata(cstream, metadata); return ret; } /* 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 = soc_compr_get_caps, .get_codec_caps = soc_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 = soc_compr_get_caps, .get_codec_caps = soc_compr_get_codec_caps }; /* create a new compress */ int soc_new_compress(struct snd_soc_pcm_runtime *rtd, int num) { struct snd_soc_codec *codec = rtd->codec; 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_compr *compr; struct snd_pcm *be_pcm; char new_name[64]; int ret = 0, direction = 0; if (rtd->num_codecs > 1) { dev_err(rtd->card->dev, "Multicodec not supported for compressed stream\n"); return -EINVAL; } /* check client and interface hw capabilities */ snprintf(new_name, sizeof(new_name), "%s %s-%d", rtd->dai_link->stream_name, codec_dai->name, num); if (codec_dai->driver->playback.channels_min) direction = SND_COMPRESS_PLAYBACK; else if (codec_dai->driver->capture.channels_min) direction = SND_COMPRESS_CAPTURE; else return -EINVAL; compr = kzalloc(sizeof(*compr), GFP_KERNEL); if (compr == NULL) { snd_printk(KERN_ERR "Cannot allocate compr\n"); return -ENOMEM; } compr->ops = devm_kzalloc(rtd->card->dev, sizeof(soc_compr_ops), GFP_KERNEL); if (compr->ops == NULL) { dev_err(rtd->card->dev, "Cannot allocate compressed ops\n"); ret = -ENOMEM; goto compr_err; } 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, 1, 0, &be_pcm); if (ret < 0) { dev_err(rtd->card->dev, "ASoC: can't create compressed for %s\n", rtd->dai_link->name); goto compr_err; } rtd->pcm = be_pcm; rtd->fe_compr = 1; be_pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream->private_data = rtd; be_pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream->private_data = rtd; memcpy(compr->ops, &soc_compr_dyn_ops, sizeof(soc_compr_dyn_ops)); } else memcpy(compr->ops, &soc_compr_ops, sizeof(soc_compr_ops)); /* Add copy callback for not memory mapped DSPs */ if (platform->driver->compr_ops && platform->driver->compr_ops->copy) compr->ops->copy = soc_compr_copy; mutex_init(&compr->lock); ret = snd_compress_new(rtd->card->snd_card, num, direction, compr); if (ret < 0) { pr_err("compress asoc: can't create compress for codec %s\n", codec->component.name); goto compr_err; } /* DAPM dai link stream work */ INIT_DELAYED_WORK(&rtd->delayed_work, close_delayed_work); rtd->compr = compr; compr->private_data = rtd; printk(KERN_INFO "compress asoc: %s <-> %s mapping ok\n", codec_dai->name, cpu_dai->name); return ret; compr_err: kfree(compr); return ret; }
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