soc-compress.rar_SOC

/* * 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) 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; 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->priva