![Liam Girdwood](/assets/img/avatar_default.png)
Make sure that the dpcm_get_be() only returns BE DAI links. Signed-off-by: Liam Girdwood <lrg@ti.com> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
2362 lines
64 KiB
C
2362 lines
64 KiB
C
/*
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* soc-pcm.c -- ALSA SoC PCM
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*
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* Copyright 2005 Wolfson Microelectronics PLC.
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* Copyright 2005 Openedhand Ltd.
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* Copyright (C) 2010 Slimlogic Ltd.
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* Copyright (C) 2010 Texas Instruments Inc.
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*
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* Authors: Liam Girdwood <lrg@ti.com>
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* Mark Brown <broonie@opensource.wolfsonmicro.com>
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or (at your
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* option) any later version.
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*
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*/
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#include <linux/kernel.h>
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#include <linux/init.h>
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#include <linux/delay.h>
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#include <linux/pm_runtime.h>
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#include <linux/slab.h>
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#include <linux/workqueue.h>
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#include <linux/export.h>
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#include <linux/debugfs.h>
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#include <sound/core.h>
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#include <sound/pcm.h>
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#include <sound/pcm_params.h>
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#include <sound/soc.h>
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#include <sound/soc-dpcm.h>
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#include <sound/initval.h>
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#define DPCM_MAX_BE_USERS 8
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/* DPCM stream event, send event to FE and all active BEs. */
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static int dpcm_dapm_stream_event(struct snd_soc_pcm_runtime *fe, int dir,
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int event)
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{
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struct snd_soc_dpcm *dpcm;
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list_for_each_entry(dpcm, &fe->dpcm[dir].be_clients, list_be) {
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struct snd_soc_pcm_runtime *be = dpcm->be;
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dev_dbg(be->dev, "pm: BE %s event %d dir %d\n",
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be->dai_link->name, event, dir);
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snd_soc_dapm_stream_event(be, dir, event);
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}
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snd_soc_dapm_stream_event(fe, dir, event);
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return 0;
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}
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static int soc_pcm_apply_symmetry(struct snd_pcm_substream *substream,
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struct snd_soc_dai *soc_dai)
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{
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struct snd_soc_pcm_runtime *rtd = substream->private_data;
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int ret;
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if (!soc_dai->driver->symmetric_rates &&
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!rtd->dai_link->symmetric_rates)
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return 0;
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/* This can happen if multiple streams are starting simultaneously -
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* the second can need to get its constraints before the first has
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* picked a rate. Complain and allow the application to carry on.
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*/
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if (!soc_dai->rate) {
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dev_warn(soc_dai->dev,
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"Not enforcing symmetric_rates due to race\n");
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return 0;
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}
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dev_dbg(soc_dai->dev, "Symmetry forces %dHz rate\n", soc_dai->rate);
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ret = snd_pcm_hw_constraint_minmax(substream->runtime,
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SNDRV_PCM_HW_PARAM_RATE,
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soc_dai->rate, soc_dai->rate);
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if (ret < 0) {
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dev_err(soc_dai->dev,
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"Unable to apply rate symmetry constraint: %d\n", ret);
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return ret;
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}
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return 0;
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}
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/*
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* List of sample sizes that might go over the bus for parameter
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* application. There ought to be a wildcard sample size for things
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* like the DAC/ADC resolution to use but there isn't right now.
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*/
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static int sample_sizes[] = {
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24, 32,
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};
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static void soc_pcm_apply_msb(struct snd_pcm_substream *substream,
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struct snd_soc_dai *dai)
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{
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int ret, i, bits;
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if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
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bits = dai->driver->playback.sig_bits;
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else
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bits = dai->driver->capture.sig_bits;
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if (!bits)
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return;
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for (i = 0; i < ARRAY_SIZE(sample_sizes); i++) {
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if (bits >= sample_sizes[i])
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continue;
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ret = snd_pcm_hw_constraint_msbits(substream->runtime, 0,
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sample_sizes[i], bits);
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if (ret != 0)
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dev_warn(dai->dev,
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"Failed to set MSB %d/%d: %d\n",
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bits, sample_sizes[i], ret);
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}
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}
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/*
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* Called by ALSA when a PCM substream is opened, the runtime->hw record is
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* then initialized and any private data can be allocated. This also calls
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* startup for the cpu DAI, platform, machine and codec DAI.
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*/
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static int soc_pcm_open(struct snd_pcm_substream *substream)
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{
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struct snd_soc_pcm_runtime *rtd = substream->private_data;
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struct snd_pcm_runtime *runtime = substream->runtime;
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struct snd_soc_platform *platform = rtd->platform;
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struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
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struct snd_soc_dai *codec_dai = rtd->codec_dai;
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struct snd_soc_dai_driver *cpu_dai_drv = cpu_dai->driver;
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struct snd_soc_dai_driver *codec_dai_drv = codec_dai->driver;
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int ret = 0;
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pm_runtime_get_sync(cpu_dai->dev);
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pm_runtime_get_sync(codec_dai->dev);
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pm_runtime_get_sync(platform->dev);
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mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
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/* startup the audio subsystem */
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if (cpu_dai->driver->ops->startup) {
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ret = cpu_dai->driver->ops->startup(substream, cpu_dai);
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if (ret < 0) {
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dev_err(cpu_dai->dev, "can't open interface %s: %d\n",
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cpu_dai->name, ret);
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goto out;
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}
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}
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if (platform->driver->ops && platform->driver->ops->open) {
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ret = platform->driver->ops->open(substream);
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if (ret < 0) {
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dev_err(platform->dev, "can't open platform %s: %d\n",
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platform->name, ret);
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goto platform_err;
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}
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}
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if (codec_dai->driver->ops->startup) {
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ret = codec_dai->driver->ops->startup(substream, codec_dai);
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if (ret < 0) {
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dev_err(codec_dai->dev, "can't open codec %s: %d\n",
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codec_dai->name, ret);
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goto codec_dai_err;
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}
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}
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if (rtd->dai_link->ops && rtd->dai_link->ops->startup) {
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ret = rtd->dai_link->ops->startup(substream);
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if (ret < 0) {
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pr_err("asoc: %s startup failed: %d\n",
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rtd->dai_link->name, ret);
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goto machine_err;
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}
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}
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/* Dynamic PCM DAI links compat checks use dynamic capabilities */
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if (rtd->dai_link->dynamic || rtd->dai_link->no_pcm)
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goto dynamic;
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/* Check that the codec and cpu DAIs are compatible */
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if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
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runtime->hw.rate_min =
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max(codec_dai_drv->playback.rate_min,
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cpu_dai_drv->playback.rate_min);
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runtime->hw.rate_max =
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min(codec_dai_drv->playback.rate_max,
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cpu_dai_drv->playback.rate_max);
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runtime->hw.channels_min =
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max(codec_dai_drv->playback.channels_min,
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cpu_dai_drv->playback.channels_min);
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runtime->hw.channels_max =
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min(codec_dai_drv->playback.channels_max,
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cpu_dai_drv->playback.channels_max);
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runtime->hw.formats =
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codec_dai_drv->playback.formats & cpu_dai_drv->playback.formats;
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runtime->hw.rates =
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codec_dai_drv->playback.rates & cpu_dai_drv->playback.rates;
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if (codec_dai_drv->playback.rates
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& (SNDRV_PCM_RATE_KNOT | SNDRV_PCM_RATE_CONTINUOUS))
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runtime->hw.rates |= cpu_dai_drv->playback.rates;
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if (cpu_dai_drv->playback.rates
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& (SNDRV_PCM_RATE_KNOT | SNDRV_PCM_RATE_CONTINUOUS))
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runtime->hw.rates |= codec_dai_drv->playback.rates;
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} else {
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runtime->hw.rate_min =
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max(codec_dai_drv->capture.rate_min,
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cpu_dai_drv->capture.rate_min);
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runtime->hw.rate_max =
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min(codec_dai_drv->capture.rate_max,
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cpu_dai_drv->capture.rate_max);
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runtime->hw.channels_min =
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max(codec_dai_drv->capture.channels_min,
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cpu_dai_drv->capture.channels_min);
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runtime->hw.channels_max =
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min(codec_dai_drv->capture.channels_max,
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cpu_dai_drv->capture.channels_max);
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runtime->hw.formats =
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codec_dai_drv->capture.formats & cpu_dai_drv->capture.formats;
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runtime->hw.rates =
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codec_dai_drv->capture.rates & cpu_dai_drv->capture.rates;
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if (codec_dai_drv->capture.rates
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& (SNDRV_PCM_RATE_KNOT | SNDRV_PCM_RATE_CONTINUOUS))
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runtime->hw.rates |= cpu_dai_drv->capture.rates;
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if (cpu_dai_drv->capture.rates
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& (SNDRV_PCM_RATE_KNOT | SNDRV_PCM_RATE_CONTINUOUS))
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runtime->hw.rates |= codec_dai_drv->capture.rates;
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}
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ret = -EINVAL;
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snd_pcm_limit_hw_rates(runtime);
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if (!runtime->hw.rates) {
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printk(KERN_ERR "asoc: %s <-> %s No matching rates\n",
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codec_dai->name, cpu_dai->name);
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goto config_err;
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}
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if (!runtime->hw.formats) {
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printk(KERN_ERR "asoc: %s <-> %s No matching formats\n",
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codec_dai->name, cpu_dai->name);
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goto config_err;
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}
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if (!runtime->hw.channels_min || !runtime->hw.channels_max ||
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runtime->hw.channels_min > runtime->hw.channels_max) {
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printk(KERN_ERR "asoc: %s <-> %s No matching channels\n",
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codec_dai->name, cpu_dai->name);
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goto config_err;
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}
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soc_pcm_apply_msb(substream, codec_dai);
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soc_pcm_apply_msb(substream, cpu_dai);
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/* Symmetry only applies if we've already got an active stream. */
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if (cpu_dai->active) {
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ret = soc_pcm_apply_symmetry(substream, cpu_dai);
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if (ret != 0)
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goto config_err;
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}
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if (codec_dai->active) {
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ret = soc_pcm_apply_symmetry(substream, codec_dai);
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if (ret != 0)
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goto config_err;
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}
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pr_debug("asoc: %s <-> %s info:\n",
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codec_dai->name, cpu_dai->name);
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pr_debug("asoc: rate mask 0x%x\n", runtime->hw.rates);
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pr_debug("asoc: min ch %d max ch %d\n", runtime->hw.channels_min,
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runtime->hw.channels_max);
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pr_debug("asoc: min rate %d max rate %d\n", runtime->hw.rate_min,
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runtime->hw.rate_max);
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dynamic:
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if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
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cpu_dai->playback_active++;
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codec_dai->playback_active++;
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} else {
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cpu_dai->capture_active++;
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codec_dai->capture_active++;
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}
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cpu_dai->active++;
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codec_dai->active++;
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rtd->codec->active++;
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mutex_unlock(&rtd->pcm_mutex);
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return 0;
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config_err:
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if (rtd->dai_link->ops && rtd->dai_link->ops->shutdown)
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rtd->dai_link->ops->shutdown(substream);
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machine_err:
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if (codec_dai->driver->ops->shutdown)
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codec_dai->driver->ops->shutdown(substream, codec_dai);
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codec_dai_err:
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if (platform->driver->ops && platform->driver->ops->close)
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platform->driver->ops->close(substream);
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platform_err:
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if (cpu_dai->driver->ops->shutdown)
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cpu_dai->driver->ops->shutdown(substream, cpu_dai);
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out:
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mutex_unlock(&rtd->pcm_mutex);
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pm_runtime_put(platform->dev);
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pm_runtime_put(codec_dai->dev);
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pm_runtime_put(cpu_dai->dev);
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return ret;
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}
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/*
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* Power down the audio subsystem pmdown_time msecs after close is called.
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* This is to ensure there are no pops or clicks in between any music tracks
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* due to DAPM power cycling.
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*/
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static void close_delayed_work(struct work_struct *work)
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{
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struct snd_soc_pcm_runtime *rtd =
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container_of(work, struct snd_soc_pcm_runtime, delayed_work.work);
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struct snd_soc_dai *codec_dai = rtd->codec_dai;
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mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
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pr_debug("pop wq checking: %s status: %s waiting: %s\n",
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codec_dai->driver->playback.stream_name,
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codec_dai->playback_active ? "active" : "inactive",
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codec_dai->pop_wait ? "yes" : "no");
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/* are we waiting on this codec DAI stream */
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if (codec_dai->pop_wait == 1) {
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codec_dai->pop_wait = 0;
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snd_soc_dapm_stream_event(rtd, SNDRV_PCM_STREAM_PLAYBACK,
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SND_SOC_DAPM_STREAM_STOP);
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}
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mutex_unlock(&rtd->pcm_mutex);
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}
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/*
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* Called by ALSA when a PCM substream is closed. Private data can be
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* freed here. The cpu DAI, codec DAI, machine and platform are also
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* shutdown.
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*/
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static int soc_pcm_close(struct snd_pcm_substream *substream)
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{
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struct snd_soc_pcm_runtime *rtd = substream->private_data;
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struct snd_soc_platform *platform = rtd->platform;
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struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
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struct snd_soc_dai *codec_dai = rtd->codec_dai;
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struct snd_soc_codec *codec = rtd->codec;
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mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
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if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
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cpu_dai->playback_active--;
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codec_dai->playback_active--;
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} else {
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cpu_dai->capture_active--;
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codec_dai->capture_active--;
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}
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cpu_dai->active--;
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codec_dai->active--;
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codec->active--;
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|
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/* clear the corresponding DAIs rate when inactive */
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if (!cpu_dai->active)
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cpu_dai->rate = 0;
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|
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if (!codec_dai->active)
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codec_dai->rate = 0;
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|
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/* Muting the DAC suppresses artifacts caused during digital
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* shutdown, for example from stopping clocks.
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*/
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if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
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snd_soc_dai_digital_mute(codec_dai, 1);
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|
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if (cpu_dai->driver->ops->shutdown)
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cpu_dai->driver->ops->shutdown(substream, cpu_dai);
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|
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if (codec_dai->driver->ops->shutdown)
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codec_dai->driver->ops->shutdown(substream, codec_dai);
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|
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if (rtd->dai_link->ops && rtd->dai_link->ops->shutdown)
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rtd->dai_link->ops->shutdown(substream);
|
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|
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if (platform->driver->ops && platform->driver->ops->close)
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platform->driver->ops->close(substream);
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cpu_dai->runtime = NULL;
|
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|
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if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
|
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if (!rtd->pmdown_time || codec->ignore_pmdown_time ||
|
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rtd->dai_link->ignore_pmdown_time) {
|
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/* powered down playback stream now */
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snd_soc_dapm_stream_event(rtd,
|
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SNDRV_PCM_STREAM_PLAYBACK,
|
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SND_SOC_DAPM_STREAM_STOP);
|
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} else {
|
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/* start delayed pop wq here for playback streams */
|
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codec_dai->pop_wait = 1;
|
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schedule_delayed_work(&rtd->delayed_work,
|
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msecs_to_jiffies(rtd->pmdown_time));
|
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}
|
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} else {
|
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/* capture streams can be powered down now */
|
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snd_soc_dapm_stream_event(rtd, SNDRV_PCM_STREAM_CAPTURE,
|
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SND_SOC_DAPM_STREAM_STOP);
|
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}
|
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|
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mutex_unlock(&rtd->pcm_mutex);
|
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|
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pm_runtime_put(platform->dev);
|
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pm_runtime_put(codec_dai->dev);
|
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pm_runtime_put(cpu_dai->dev);
|
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|
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return 0;
|
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}
|
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|
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/*
|
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* Called by ALSA when the PCM substream is prepared, can set format, sample
|
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* rate, etc. This function is non atomic and can be called multiple times,
|
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* it can refer to the runtime info.
|
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*/
|
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static int soc_pcm_prepare(struct snd_pcm_substream *substream)
|
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{
|
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struct snd_soc_pcm_runtime *rtd = substream->private_data;
|
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struct snd_soc_platform *platform = rtd->platform;
|
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struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
|
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struct snd_soc_dai *codec_dai = rtd->codec_dai;
|
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int ret = 0;
|
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|
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mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
|
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|
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if (rtd->dai_link->ops && rtd->dai_link->ops->prepare) {
|
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ret = rtd->dai_link->ops->prepare(substream);
|
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if (ret < 0) {
|
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pr_err("asoc: machine prepare error: %d\n", ret);
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goto out;
|
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}
|
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}
|
|
|
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if (platform->driver->ops && platform->driver->ops->prepare) {
|
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ret = platform->driver->ops->prepare(substream);
|
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if (ret < 0) {
|
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dev_err(platform->dev, "platform prepare error: %d\n",
|
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ret);
|
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goto out;
|
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}
|
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}
|
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|
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if (codec_dai->driver->ops->prepare) {
|
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ret = codec_dai->driver->ops->prepare(substream, codec_dai);
|
|
if (ret < 0) {
|
|
dev_err(codec_dai->dev, "DAI prepare error: %d\n",
|
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ret);
|
|
goto out;
|
|
}
|
|
}
|
|
|
|
if (cpu_dai->driver->ops->prepare) {
|
|
ret = cpu_dai->driver->ops->prepare(substream, cpu_dai);
|
|
if (ret < 0) {
|
|
dev_err(cpu_dai->dev, "DAI prepare error: %d\n",
|
|
ret);
|
|
goto out;
|
|
}
|
|
}
|
|
|
|
/* cancel any delayed stream shutdown that is pending */
|
|
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
|
|
codec_dai->pop_wait) {
|
|
codec_dai->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);
|
|
|
|
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);
|
|
|
|
if (rtd->dai_link->ops && rtd->dai_link->ops->hw_params) {
|
|
ret = rtd->dai_link->ops->hw_params(substream, params);
|
|
if (ret < 0) {
|
|
pr_err("asoc: machine hw_params failed: %d\n", ret);
|
|
goto out;
|
|
}
|
|
}
|
|
|
|
if (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, "can't set %s hw params: %d\n",
|
|
codec_dai->name, ret);
|
|
goto codec_err;
|
|
}
|
|
}
|
|
|
|
if (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, "%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, "%s hw params failed: %d\n",
|
|
platform->name, ret);
|
|
goto platform_err;
|
|
}
|
|
}
|
|
|
|
/* store the rate for each DAIs */
|
|
cpu_dai->rate = params_rate(params);
|
|
codec_dai->rate = params_rate(params);
|
|
|
|
out:
|
|
mutex_unlock(&rtd->pcm_mutex);
|
|
return ret;
|
|
|
|
platform_err:
|
|
if (cpu_dai->driver->ops->hw_free)
|
|
cpu_dai->driver->ops->hw_free(substream, cpu_dai);
|
|
|
|
interface_err:
|
|
if (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;
|
|
struct snd_soc_codec *codec = rtd->codec;
|
|
|
|
mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
|
|
|
|
/* apply codec digital mute */
|
|
if (!codec->active)
|
|
snd_soc_dai_digital_mute(codec_dai, 1);
|
|
|
|
/* 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->hw_free)
|
|
codec_dai->driver->ops->hw_free(substream, codec_dai);
|
|
|
|
if (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->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->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->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->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->delay)
|
|
delay += cpu_dai->driver->ops->delay(substream, cpu_dai);
|
|
|
|
if (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 */
|
|
static 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, "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, "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;
|
|
}
|
|
|
|
static 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, "found %d audio %s paths\n", paths,
|
|
stream ? "capture" : "playback");
|
|
|
|
*list_ = list;
|
|
return paths;
|
|
}
|
|
|
|
static inline void dpcm_path_put(struct snd_soc_dapm_widget_list **list)
|
|
{
|
|
kfree(*list);
|
|
}
|
|
|
|
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, "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, "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++) {
|
|
|
|
if (list->widgets[i]->id != snd_soc_dapm_dai)
|
|
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, "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)
|
|
continue;
|
|
|
|
/* newly connected FE and BE */
|
|
err = dpcm_be_connect(fe, be, stream);
|
|
if (err < 0) {
|
|
dev_err(fe->dev, "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, "found %d new BE paths\n", new);
|
|
return new;
|
|
}
|
|
|
|
/*
|
|
* Find the corresponding BE DAIs that source or sink audio to this
|
|
* FE substream.
|
|
*/
|
|
static 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);
|
|
}
|
|
|
|
static 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, "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;
|
|
}
|
|
}
|
|
|
|
static 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);
|
|
|
|
/* 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, "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, "dpcm: open BE %s\n", be->dai_link->name);
|
|
|
|
be_substream->runtime = be->dpcm[stream].runtime;
|
|
err = soc_pcm_open(be_substream);
|
|
if (err < 0) {
|
|
dev_err(be->dev, "BE open failed %d\n", err);
|
|
be->dpcm[stream].users--;
|
|
if (be->dpcm[stream].users < 0)
|
|
dev_err(be->dev, "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, "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_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) {
|
|
runtime->hw.rate_min = cpu_dai_drv->playback.rate_min;
|
|
runtime->hw.rate_max = cpu_dai_drv->playback.rate_max;
|
|
runtime->hw.channels_min = cpu_dai_drv->playback.channels_min;
|
|
runtime->hw.channels_max = cpu_dai_drv->playback.channels_max;
|
|
runtime->hw.formats &= cpu_dai_drv->playback.formats;
|
|
runtime->hw.rates = cpu_dai_drv->playback.rates;
|
|
} else {
|
|
runtime->hw.rate_min = cpu_dai_drv->capture.rate_min;
|
|
runtime->hw.rate_max = cpu_dai_drv->capture.rate_max;
|
|
runtime->hw.channels_min = cpu_dai_drv->capture.channels_min;
|
|
runtime->hw.channels_max = cpu_dai_drv->capture.channels_max;
|
|
runtime->hw.formats &= cpu_dai_drv->capture.formats;
|
|
runtime->hw.rates = cpu_dai_drv->capture.rates;
|
|
}
|
|
}
|
|
|
|
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,"dpcm: failed to start some BEs %d\n", ret);
|
|
goto be_err;
|
|
}
|
|
|
|
dev_dbg(fe->dev, "dpcm: 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,"dpcm: 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;
|
|
}
|
|
|
|
static 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, "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, "dpcm: 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, "dpcm: 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;
|
|
}
|
|
|
|
static 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_STOP))
|
|
continue;
|
|
|
|
dev_dbg(be->dev, "dpcm: 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, "dpcm: 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,"dpcm: 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;
|
|
}
|
|
|
|
static 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, "dpcm: 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,
|
|
"dpcm: 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,
|
|
"dpcm: 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,"dpcm: hw_params BE failed %d\n", ret);
|
|
goto out;
|
|
}
|
|
|
|
dev_dbg(fe->dev, "dpcm: 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,"dpcm: 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, "dpcm: 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,"dpcm: trigger BE failed %d\n", ret);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static 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, "dpcm: 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,"dpcm: 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,"dpcm: trigger FE failed %d\n", ret);
|
|
goto out;
|
|
}
|
|
|
|
dev_dbg(fe->dev, "dpcm: 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, "dpcm: 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,"dpcm: trigger FE failed %d\n", ret);
|
|
goto out;
|
|
}
|
|
break;
|
|
default:
|
|
dev_err(fe->dev, "dpcm: 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;
|
|
}
|
|
|
|
static 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, "dpcm: prepare BE %s\n",
|
|
dpcm->fe->dai_link->name);
|
|
|
|
ret = soc_pcm_prepare(be_substream);
|
|
if (ret < 0) {
|
|
dev_err(be->dev, "dpcm: 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, "dpcm: 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, "dpcm: 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,"dpcm: 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->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, "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, "dpcm: 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,"dpcm: trigger FE failed %d\n", err);
|
|
} else {
|
|
dev_dbg(fe->dev, "dpcm: 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,"dpcm: trigger FE failed %d\n", err);
|
|
}
|
|
|
|
err = dpcm_be_dai_hw_free(fe, stream);
|
|
if (err < 0)
|
|
dev_err(fe->dev,"dpcm: hw_free FE failed %d\n", err);
|
|
|
|
err = dpcm_be_dai_shutdown(fe, stream);
|
|
if (err < 0)
|
|
dev_err(fe->dev,"dpcm: 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, "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;
|
|
return ret;
|
|
}
|
|
|
|
/* 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;
|
|
return ret;
|
|
}
|
|
|
|
/* 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;
|
|
return ret;
|
|
}
|
|
|
|
/* 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, "dpcm: 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,"dpcm: bespoke trigger FE failed %d\n", ret);
|
|
goto hw_free;
|
|
}
|
|
} else {
|
|
dev_dbg(fe->dev, "dpcm: 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,"dpcm: 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, "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, "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_dapm_widget *widget)
|
|
{
|
|
struct snd_soc_card *card;
|
|
int i, old, new, paths;
|
|
|
|
if (widget->codec)
|
|
card = widget->codec->card;
|
|
else if (widget->platform)
|
|
card = widget->platform->card;
|
|
else
|
|
return -EINVAL;
|
|
|
|
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, "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, "%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, "%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, "BE digital mute %s\n", be->dai_link->name);
|
|
|
|
if (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_warn(fe->dev, "asoc: %s no valid %s route\n",
|
|
fe->dai_link->name, stream ? "capture" : "playback");
|
|
mutex_unlock(&fe->card->mutex);
|
|
return -EINVAL;
|
|
}
|
|
|
|
/* 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_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_pcm *pcm;
|
|
char new_name[64];
|
|
int ret = 0, playback = 0, capture = 0;
|
|
|
|
if (rtd->dai_link->dynamic || rtd->dai_link->no_pcm) {
|
|
if (cpu_dai->driver->playback.channels_min)
|
|
playback = 1;
|
|
if (cpu_dai->driver->capture.channels_min)
|
|
capture = 1;
|
|
} else {
|
|
if (codec_dai->driver->playback.channels_min)
|
|
playback = 1;
|
|
if (codec_dai->driver->capture.channels_min)
|
|
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) {
|
|
printk(KERN_ERR "asoc: can't create pcm for codec %s\n", codec->name);
|
|
return ret;
|
|
}
|
|
dev_dbg(rtd->card->dev, "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) {
|
|
pr_err("asoc: platform pcm constructor failed\n");
|
|
return ret;
|
|
}
|
|
}
|
|
|
|
pcm->private_free = platform->driver->pcm_free;
|
|
out:
|
|
printk(KERN_INFO "asoc: %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->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
|