v4.19.13 snapshot.
diff --git a/sound/soc/soc-pcm.c b/sound/soc/soc-pcm.c
new file mode 100644
index 0000000..e8b98bf
--- /dev/null
+++ b/sound/soc/soc-pcm.c
@@ -0,0 +1,3416 @@
+// SPDX-License-Identifier: GPL-2.0+
+//
+// soc-pcm.c -- ALSA SoC PCM
+//
+// Copyright 2005 Wolfson Microelectronics PLC.
+// Copyright 2005 Openedhand Ltd.
+// Copyright (C) 2010 Slimlogic Ltd.
+// Copyright (C) 2010 Texas Instruments Inc.
+//
+// Authors: Liam Girdwood <lrg@ti.com>
+// Mark Brown <broonie@opensource.wolfsonmicro.com>
+
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/delay.h>
+#include <linux/pinctrl/consumer.h>
+#include <linux/pm_runtime.h>
+#include <linux/slab.h>
+#include <linux/workqueue.h>
+#include <linux/export.h>
+#include <linux/debugfs.h>
+#include <sound/core.h>
+#include <sound/pcm.h>
+#include <sound/pcm_params.h>
+#include <sound/soc.h>
+#include <sound/soc-dpcm.h>
+#include <sound/initval.h>
+
+#define DPCM_MAX_BE_USERS 8
+
+/*
+ * snd_soc_dai_stream_valid() - check if a DAI supports the given stream
+ *
+ * Returns true if the DAI supports the indicated stream type.
+ */
+static bool snd_soc_dai_stream_valid(struct snd_soc_dai *dai, int stream)
+{
+ struct snd_soc_pcm_stream *codec_stream;
+
+ if (stream == SNDRV_PCM_STREAM_PLAYBACK)
+ codec_stream = &dai->driver->playback;
+ else
+ codec_stream = &dai->driver->capture;
+
+ /* If the codec specifies any rate at all, it supports the stream. */
+ return codec_stream->rates;
+}
+
+/**
+ * snd_soc_runtime_activate() - Increment active count for PCM runtime components
+ * @rtd: ASoC PCM runtime that is activated
+ * @stream: Direction of the PCM stream
+ *
+ * Increments the active count for all the DAIs and components attached to a PCM
+ * runtime. Should typically be called when a stream is opened.
+ *
+ * Must be called with the rtd->pcm_mutex being held
+ */
+void snd_soc_runtime_activate(struct snd_soc_pcm_runtime *rtd, int stream)
+{
+ struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
+ int i;
+
+ lockdep_assert_held(&rtd->pcm_mutex);
+
+ if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
+ cpu_dai->playback_active++;
+ for (i = 0; i < rtd->num_codecs; i++)
+ rtd->codec_dais[i]->playback_active++;
+ } else {
+ cpu_dai->capture_active++;
+ for (i = 0; i < rtd->num_codecs; i++)
+ rtd->codec_dais[i]->capture_active++;
+ }
+
+ cpu_dai->active++;
+ cpu_dai->component->active++;
+ for (i = 0; i < rtd->num_codecs; i++) {
+ rtd->codec_dais[i]->active++;
+ rtd->codec_dais[i]->component->active++;
+ }
+}
+
+/**
+ * snd_soc_runtime_deactivate() - Decrement active count for PCM runtime components
+ * @rtd: ASoC PCM runtime that is deactivated
+ * @stream: Direction of the PCM stream
+ *
+ * Decrements the active count for all the DAIs and components attached to a PCM
+ * runtime. Should typically be called when a stream is closed.
+ *
+ * Must be called with the rtd->pcm_mutex being held
+ */
+void snd_soc_runtime_deactivate(struct snd_soc_pcm_runtime *rtd, int stream)
+{
+ struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
+ int i;
+
+ lockdep_assert_held(&rtd->pcm_mutex);
+
+ if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
+ cpu_dai->playback_active--;
+ for (i = 0; i < rtd->num_codecs; i++)
+ rtd->codec_dais[i]->playback_active--;
+ } else {
+ cpu_dai->capture_active--;
+ for (i = 0; i < rtd->num_codecs; i++)
+ rtd->codec_dais[i]->capture_active--;
+ }
+
+ cpu_dai->active--;
+ cpu_dai->component->active--;
+ for (i = 0; i < rtd->num_codecs; i++) {
+ rtd->codec_dais[i]->component->active--;
+ rtd->codec_dais[i]->active--;
+ }
+}
+
+/**
+ * snd_soc_runtime_ignore_pmdown_time() - Check whether to ignore the power down delay
+ * @rtd: The ASoC PCM runtime that should be checked.
+ *
+ * This function checks whether the power down delay should be ignored for a
+ * specific PCM runtime. Returns true if the delay is 0, if it the DAI link has
+ * been configured to ignore the delay, or if none of the components benefits
+ * from having the delay.
+ */
+bool snd_soc_runtime_ignore_pmdown_time(struct snd_soc_pcm_runtime *rtd)
+{
+ struct snd_soc_rtdcom_list *rtdcom;
+ struct snd_soc_component *component;
+ bool ignore = true;
+
+ if (!rtd->pmdown_time || rtd->dai_link->ignore_pmdown_time)
+ return true;
+
+ for_each_rtdcom(rtd, rtdcom) {
+ component = rtdcom->component;
+
+ ignore &= !component->driver->use_pmdown_time;
+ }
+
+ return ignore;
+}
+
+/**
+ * snd_soc_set_runtime_hwparams - set the runtime hardware parameters
+ * @substream: the pcm substream
+ * @hw: the hardware parameters
+ *
+ * Sets the substream runtime hardware parameters.
+ */
+int snd_soc_set_runtime_hwparams(struct snd_pcm_substream *substream,
+ const struct snd_pcm_hardware *hw)
+{
+ struct snd_pcm_runtime *runtime = substream->runtime;
+ runtime->hw.info = hw->info;
+ runtime->hw.formats = hw->formats;
+ runtime->hw.period_bytes_min = hw->period_bytes_min;
+ runtime->hw.period_bytes_max = hw->period_bytes_max;
+ runtime->hw.periods_min = hw->periods_min;
+ runtime->hw.periods_max = hw->periods_max;
+ runtime->hw.buffer_bytes_max = hw->buffer_bytes_max;
+ runtime->hw.fifo_size = hw->fifo_size;
+ return 0;
+}
+EXPORT_SYMBOL_GPL(snd_soc_set_runtime_hwparams);
+
+/* DPCM stream event, send event to FE and all active BEs. */
+int dpcm_dapm_stream_event(struct snd_soc_pcm_runtime *fe, int dir,
+ int event)
+{
+ struct snd_soc_dpcm *dpcm;
+
+ list_for_each_entry(dpcm, &fe->dpcm[dir].be_clients, list_be) {
+
+ struct snd_soc_pcm_runtime *be = dpcm->be;
+
+ dev_dbg(be->dev, "ASoC: BE %s event %d dir %d\n",
+ be->dai_link->name, event, dir);
+
+ if ((event == SND_SOC_DAPM_STREAM_STOP) &&
+ (be->dpcm[dir].users >= 1))
+ continue;
+
+ snd_soc_dapm_stream_event(be, dir, event);
+ }
+
+ snd_soc_dapm_stream_event(fe, dir, event);
+
+ return 0;
+}
+
+static int soc_pcm_apply_symmetry(struct snd_pcm_substream *substream,
+ struct snd_soc_dai *soc_dai)
+{
+ struct snd_soc_pcm_runtime *rtd = substream->private_data;
+ int ret;
+
+ if (soc_dai->rate && (soc_dai->driver->symmetric_rates ||
+ rtd->dai_link->symmetric_rates)) {
+ dev_dbg(soc_dai->dev, "ASoC: Symmetry forces %dHz rate\n",
+ soc_dai->rate);
+
+ ret = snd_pcm_hw_constraint_single(substream->runtime,
+ SNDRV_PCM_HW_PARAM_RATE,
+ soc_dai->rate);
+ if (ret < 0) {
+ dev_err(soc_dai->dev,
+ "ASoC: Unable to apply rate constraint: %d\n",
+ ret);
+ return ret;
+ }
+ }
+
+ if (soc_dai->channels && (soc_dai->driver->symmetric_channels ||
+ rtd->dai_link->symmetric_channels)) {
+ dev_dbg(soc_dai->dev, "ASoC: Symmetry forces %d channel(s)\n",
+ soc_dai->channels);
+
+ ret = snd_pcm_hw_constraint_single(substream->runtime,
+ SNDRV_PCM_HW_PARAM_CHANNELS,
+ soc_dai->channels);
+ if (ret < 0) {
+ dev_err(soc_dai->dev,
+ "ASoC: Unable to apply channel symmetry constraint: %d\n",
+ ret);
+ return ret;
+ }
+ }
+
+ if (soc_dai->sample_bits && (soc_dai->driver->symmetric_samplebits ||
+ rtd->dai_link->symmetric_samplebits)) {
+ dev_dbg(soc_dai->dev, "ASoC: Symmetry forces %d sample bits\n",
+ soc_dai->sample_bits);
+
+ ret = snd_pcm_hw_constraint_single(substream->runtime,
+ SNDRV_PCM_HW_PARAM_SAMPLE_BITS,
+ soc_dai->sample_bits);
+ if (ret < 0) {
+ dev_err(soc_dai->dev,
+ "ASoC: Unable to apply sample bits symmetry constraint: %d\n",
+ ret);
+ return ret;
+ }
+ }
+
+ return 0;
+}
+
+static int soc_pcm_params_symmetry(struct snd_pcm_substream *substream,
+ struct snd_pcm_hw_params *params)
+{
+ struct snd_soc_pcm_runtime *rtd = substream->private_data;
+ struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
+ unsigned int rate, channels, sample_bits, symmetry, i;
+
+ rate = params_rate(params);
+ channels = params_channels(params);
+ sample_bits = snd_pcm_format_physical_width(params_format(params));
+
+ /* reject unmatched parameters when applying symmetry */
+ symmetry = cpu_dai->driver->symmetric_rates ||
+ rtd->dai_link->symmetric_rates;
+
+ for (i = 0; i < rtd->num_codecs; i++)
+ symmetry |= rtd->codec_dais[i]->driver->symmetric_rates;
+
+ if (symmetry && cpu_dai->rate && cpu_dai->rate != rate) {
+ dev_err(rtd->dev, "ASoC: unmatched rate symmetry: %d - %d\n",
+ cpu_dai->rate, rate);
+ return -EINVAL;
+ }
+
+ symmetry = cpu_dai->driver->symmetric_channels ||
+ rtd->dai_link->symmetric_channels;
+
+ for (i = 0; i < rtd->num_codecs; i++)
+ symmetry |= rtd->codec_dais[i]->driver->symmetric_channels;
+
+ if (symmetry && cpu_dai->channels && cpu_dai->channels != channels) {
+ dev_err(rtd->dev, "ASoC: unmatched channel symmetry: %d - %d\n",
+ cpu_dai->channels, channels);
+ return -EINVAL;
+ }
+
+ symmetry = cpu_dai->driver->symmetric_samplebits ||
+ rtd->dai_link->symmetric_samplebits;
+
+ for (i = 0; i < rtd->num_codecs; i++)
+ symmetry |= rtd->codec_dais[i]->driver->symmetric_samplebits;
+
+ if (symmetry && cpu_dai->sample_bits && cpu_dai->sample_bits != sample_bits) {
+ dev_err(rtd->dev, "ASoC: unmatched sample bits symmetry: %d - %d\n",
+ cpu_dai->sample_bits, sample_bits);
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+static bool soc_pcm_has_symmetry(struct snd_pcm_substream *substream)
+{
+ struct snd_soc_pcm_runtime *rtd = substream->private_data;
+ struct snd_soc_dai_driver *cpu_driver = rtd->cpu_dai->driver;
+ struct snd_soc_dai_link *link = rtd->dai_link;
+ unsigned int symmetry, i;
+
+ symmetry = cpu_driver->symmetric_rates || link->symmetric_rates ||
+ cpu_driver->symmetric_channels || link->symmetric_channels ||
+ cpu_driver->symmetric_samplebits || link->symmetric_samplebits;
+
+ for (i = 0; i < rtd->num_codecs; i++)
+ symmetry = symmetry ||
+ rtd->codec_dais[i]->driver->symmetric_rates ||
+ rtd->codec_dais[i]->driver->symmetric_channels ||
+ rtd->codec_dais[i]->driver->symmetric_samplebits;
+
+ return symmetry;
+}
+
+static void soc_pcm_set_msb(struct snd_pcm_substream *substream, int bits)
+{
+ struct snd_soc_pcm_runtime *rtd = substream->private_data;
+ int ret;
+
+ if (!bits)
+ return;
+
+ ret = snd_pcm_hw_constraint_msbits(substream->runtime, 0, 0, bits);
+ if (ret != 0)
+ dev_warn(rtd->dev, "ASoC: Failed to set MSB %d: %d\n",
+ bits, ret);
+}
+
+static void soc_pcm_apply_msb(struct snd_pcm_substream *substream)
+{
+ struct snd_soc_pcm_runtime *rtd = substream->private_data;
+ struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
+ struct snd_soc_dai *codec_dai;
+ int i;
+ unsigned int bits = 0, cpu_bits;
+
+ if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
+ for (i = 0; i < rtd->num_codecs; i++) {
+ codec_dai = rtd->codec_dais[i];
+ if (codec_dai->driver->playback.sig_bits == 0) {
+ bits = 0;
+ break;
+ }
+ bits = max(codec_dai->driver->playback.sig_bits, bits);
+ }
+ cpu_bits = cpu_dai->driver->playback.sig_bits;
+ } else {
+ for (i = 0; i < rtd->num_codecs; i++) {
+ codec_dai = rtd->codec_dais[i];
+ if (codec_dai->driver->capture.sig_bits == 0) {
+ bits = 0;
+ break;
+ }
+ bits = max(codec_dai->driver->capture.sig_bits, bits);
+ }
+ cpu_bits = cpu_dai->driver->capture.sig_bits;
+ }
+
+ soc_pcm_set_msb(substream, bits);
+ soc_pcm_set_msb(substream, cpu_bits);
+}
+
+static void soc_pcm_init_runtime_hw(struct snd_pcm_substream *substream)
+{
+ struct snd_pcm_runtime *runtime = substream->runtime;
+ struct snd_pcm_hardware *hw = &runtime->hw;
+ struct snd_soc_pcm_runtime *rtd = substream->private_data;
+ struct snd_soc_dai_driver *cpu_dai_drv = rtd->cpu_dai->driver;
+ struct snd_soc_dai_driver *codec_dai_drv;
+ struct snd_soc_pcm_stream *codec_stream;
+ struct snd_soc_pcm_stream *cpu_stream;
+ unsigned int chan_min = 0, chan_max = UINT_MAX;
+ unsigned int rate_min = 0, rate_max = UINT_MAX;
+ unsigned int rates = UINT_MAX;
+ u64 formats = ULLONG_MAX;
+ int i;
+
+ if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
+ cpu_stream = &cpu_dai_drv->playback;
+ else
+ cpu_stream = &cpu_dai_drv->capture;
+
+ /* first calculate min/max only for CODECs in the DAI link */
+ for (i = 0; i < rtd->num_codecs; i++) {
+
+ /*
+ * Skip CODECs which don't support the current stream type.
+ * Otherwise, since the rate, channel, and format values will
+ * zero in that case, we would have no usable settings left,
+ * causing the resulting setup to fail.
+ * At least one CODEC should match, otherwise we should have
+ * bailed out on a higher level, since there would be no
+ * CODEC to support the transfer direction in that case.
+ */
+ if (!snd_soc_dai_stream_valid(rtd->codec_dais[i],
+ substream->stream))
+ continue;
+
+ codec_dai_drv = rtd->codec_dais[i]->driver;
+ if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
+ codec_stream = &codec_dai_drv->playback;
+ else
+ codec_stream = &codec_dai_drv->capture;
+ chan_min = max(chan_min, codec_stream->channels_min);
+ chan_max = min(chan_max, codec_stream->channels_max);
+ rate_min = max(rate_min, codec_stream->rate_min);
+ rate_max = min_not_zero(rate_max, codec_stream->rate_max);
+ formats &= codec_stream->formats;
+ rates = snd_pcm_rate_mask_intersect(codec_stream->rates, rates);
+ }
+
+ /*
+ * chan min/max cannot be enforced if there are multiple CODEC DAIs
+ * connected to a single CPU DAI, use CPU DAI's directly and let
+ * channel allocation be fixed up later
+ */
+ if (rtd->num_codecs > 1) {
+ chan_min = cpu_stream->channels_min;
+ chan_max = cpu_stream->channels_max;
+ }
+
+ hw->channels_min = max(chan_min, cpu_stream->channels_min);
+ hw->channels_max = min(chan_max, cpu_stream->channels_max);
+ if (hw->formats)
+ hw->formats &= formats & cpu_stream->formats;
+ else
+ hw->formats = formats & cpu_stream->formats;
+ hw->rates = snd_pcm_rate_mask_intersect(rates, cpu_stream->rates);
+
+ snd_pcm_limit_hw_rates(runtime);
+
+ hw->rate_min = max(hw->rate_min, cpu_stream->rate_min);
+ hw->rate_min = max(hw->rate_min, rate_min);
+ hw->rate_max = min_not_zero(hw->rate_max, cpu_stream->rate_max);
+ hw->rate_max = min_not_zero(hw->rate_max, rate_max);
+}
+
+static int soc_pcm_components_close(struct snd_pcm_substream *substream,
+ struct snd_soc_component *last)
+{
+ struct snd_soc_pcm_runtime *rtd = substream->private_data;
+ struct snd_soc_rtdcom_list *rtdcom;
+ struct snd_soc_component *component;
+
+ for_each_rtdcom(rtd, rtdcom) {
+ component = rtdcom->component;
+
+ if (component == last)
+ break;
+
+ if (!component->driver->ops ||
+ !component->driver->ops->close)
+ continue;
+
+ component->driver->ops->close(substream);
+ }
+
+ return 0;
+}
+
+/*
+ * Called by ALSA when a PCM substream is opened, the runtime->hw record is
+ * then initialized and any private data can be allocated. This also calls
+ * startup for the cpu DAI, component, machine and codec DAI.
+ */
+static int soc_pcm_open(struct snd_pcm_substream *substream)
+{
+ struct snd_soc_pcm_runtime *rtd = substream->private_data;
+ struct snd_pcm_runtime *runtime = substream->runtime;
+ struct snd_soc_component *component;
+ struct snd_soc_rtdcom_list *rtdcom;
+ struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
+ struct snd_soc_dai *codec_dai;
+ const char *codec_dai_name = "multicodec";
+ int i, ret = 0;
+
+ pinctrl_pm_select_default_state(cpu_dai->dev);
+ for (i = 0; i < rtd->num_codecs; i++)
+ pinctrl_pm_select_default_state(rtd->codec_dais[i]->dev);
+
+ for_each_rtdcom(rtd, rtdcom) {
+ component = rtdcom->component;
+
+ pm_runtime_get_sync(component->dev);
+ }
+
+ mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
+
+ /* startup the audio subsystem */
+ if (cpu_dai->driver->ops->startup) {
+ ret = cpu_dai->driver->ops->startup(substream, cpu_dai);
+ if (ret < 0) {
+ dev_err(cpu_dai->dev, "ASoC: can't open interface"
+ " %s: %d\n", cpu_dai->name, ret);
+ goto out;
+ }
+ }
+
+ for_each_rtdcom(rtd, rtdcom) {
+ component = rtdcom->component;
+
+ if (!component->driver->ops ||
+ !component->driver->ops->open)
+ continue;
+
+ ret = component->driver->ops->open(substream);
+ if (ret < 0) {
+ dev_err(component->dev,
+ "ASoC: can't open component %s: %d\n",
+ component->name, ret);
+ goto component_err;
+ }
+ }
+ component = NULL;
+
+ for (i = 0; i < rtd->num_codecs; i++) {
+ codec_dai = rtd->codec_dais[i];
+ if (codec_dai->driver->ops->startup) {
+ ret = codec_dai->driver->ops->startup(substream,
+ codec_dai);
+ if (ret < 0) {
+ dev_err(codec_dai->dev,
+ "ASoC: can't open codec %s: %d\n",
+ codec_dai->name, ret);
+ goto codec_dai_err;
+ }
+ }
+
+ if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
+ codec_dai->tx_mask = 0;
+ else
+ codec_dai->rx_mask = 0;
+ }
+
+ if (rtd->dai_link->ops->startup) {
+ ret = rtd->dai_link->ops->startup(substream);
+ if (ret < 0) {
+ pr_err("ASoC: %s startup failed: %d\n",
+ rtd->dai_link->name, ret);
+ goto machine_err;
+ }
+ }
+
+ /* Dynamic PCM DAI links compat checks use dynamic capabilities */
+ if (rtd->dai_link->dynamic || rtd->dai_link->no_pcm)
+ goto dynamic;
+
+ /* Check that the codec and cpu DAIs are compatible */
+ soc_pcm_init_runtime_hw(substream);
+
+ if (rtd->num_codecs == 1)
+ codec_dai_name = rtd->codec_dai->name;
+
+ if (soc_pcm_has_symmetry(substream))
+ runtime->hw.info |= SNDRV_PCM_INFO_JOINT_DUPLEX;
+
+ ret = -EINVAL;
+ if (!runtime->hw.rates) {
+ printk(KERN_ERR "ASoC: %s <-> %s No matching rates\n",
+ codec_dai_name, cpu_dai->name);
+ goto config_err;
+ }
+ if (!runtime->hw.formats) {
+ printk(KERN_ERR "ASoC: %s <-> %s No matching formats\n",
+ codec_dai_name, cpu_dai->name);
+ goto config_err;
+ }
+ if (!runtime->hw.channels_min || !runtime->hw.channels_max ||
+ runtime->hw.channels_min > runtime->hw.channels_max) {
+ printk(KERN_ERR "ASoC: %s <-> %s No matching channels\n",
+ codec_dai_name, cpu_dai->name);
+ goto config_err;
+ }
+
+ soc_pcm_apply_msb(substream);
+
+ /* Symmetry only applies if we've already got an active stream. */
+ if (cpu_dai->active) {
+ ret = soc_pcm_apply_symmetry(substream, cpu_dai);
+ if (ret != 0)
+ goto config_err;
+ }
+
+ for (i = 0; i < rtd->num_codecs; i++) {
+ if (rtd->codec_dais[i]->active) {
+ ret = soc_pcm_apply_symmetry(substream,
+ rtd->codec_dais[i]);
+ if (ret != 0)
+ goto config_err;
+ }
+ }
+
+ pr_debug("ASoC: %s <-> %s info:\n",
+ codec_dai_name, cpu_dai->name);
+ pr_debug("ASoC: rate mask 0x%x\n", runtime->hw.rates);
+ pr_debug("ASoC: min ch %d max ch %d\n", runtime->hw.channels_min,
+ runtime->hw.channels_max);
+ pr_debug("ASoC: min rate %d max rate %d\n", runtime->hw.rate_min,
+ runtime->hw.rate_max);
+
+dynamic:
+
+ snd_soc_runtime_activate(rtd, substream->stream);
+
+ mutex_unlock(&rtd->pcm_mutex);
+ return 0;
+
+config_err:
+ if (rtd->dai_link->ops->shutdown)
+ rtd->dai_link->ops->shutdown(substream);
+
+machine_err:
+ i = rtd->num_codecs;
+
+codec_dai_err:
+ while (--i >= 0) {
+ codec_dai = rtd->codec_dais[i];
+ if (codec_dai->driver->ops->shutdown)
+ codec_dai->driver->ops->shutdown(substream, codec_dai);
+ }
+
+component_err:
+ soc_pcm_components_close(substream, component);
+
+ if (cpu_dai->driver->ops->shutdown)
+ cpu_dai->driver->ops->shutdown(substream, cpu_dai);
+out:
+ mutex_unlock(&rtd->pcm_mutex);
+
+ for_each_rtdcom(rtd, rtdcom) {
+ component = rtdcom->component;
+
+ pm_runtime_mark_last_busy(component->dev);
+ pm_runtime_put_autosuspend(component->dev);
+ }
+
+ for (i = 0; i < rtd->num_codecs; i++) {
+ if (!rtd->codec_dais[i]->active)
+ pinctrl_pm_select_sleep_state(rtd->codec_dais[i]->dev);
+ }
+ if (!cpu_dai->active)
+ pinctrl_pm_select_sleep_state(cpu_dai->dev);
+
+ return ret;
+}
+
+/*
+ * Power down the audio subsystem pmdown_time msecs after close is called.
+ * This is to ensure there are no pops or clicks in between any music tracks
+ * due to DAPM power cycling.
+ */
+static void close_delayed_work(struct work_struct *work)
+{
+ struct snd_soc_pcm_runtime *rtd =
+ container_of(work, struct snd_soc_pcm_runtime, delayed_work.work);
+ struct snd_soc_dai *codec_dai = rtd->codec_dais[0];
+
+ mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
+
+ dev_dbg(rtd->dev, "ASoC: pop wq checking: %s status: %s waiting: %s\n",
+ codec_dai->driver->playback.stream_name,
+ codec_dai->playback_active ? "active" : "inactive",
+ rtd->pop_wait ? "yes" : "no");
+
+ /* are we waiting on this codec DAI stream */
+ if (rtd->pop_wait == 1) {
+ rtd->pop_wait = 0;
+ snd_soc_dapm_stream_event(rtd, SNDRV_PCM_STREAM_PLAYBACK,
+ SND_SOC_DAPM_STREAM_STOP);
+ }
+
+ mutex_unlock(&rtd->pcm_mutex);
+}
+
+/*
+ * Called by ALSA when a PCM substream is closed. Private data can be
+ * freed here. The cpu DAI, codec DAI, machine and components are also
+ * shutdown.
+ */
+static int soc_pcm_close(struct snd_pcm_substream *substream)
+{
+ struct snd_soc_pcm_runtime *rtd = substream->private_data;
+ struct snd_soc_component *component;
+ struct snd_soc_rtdcom_list *rtdcom;
+ struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
+ struct snd_soc_dai *codec_dai;
+ int i;
+
+ mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
+
+ snd_soc_runtime_deactivate(rtd, substream->stream);
+
+ /* clear the corresponding DAIs rate when inactive */
+ if (!cpu_dai->active)
+ cpu_dai->rate = 0;
+
+ for (i = 0; i < rtd->num_codecs; i++) {
+ codec_dai = rtd->codec_dais[i];
+ if (!codec_dai->active)
+ codec_dai->rate = 0;
+ }
+
+ snd_soc_dai_digital_mute(cpu_dai, 1, substream->stream);
+
+ if (cpu_dai->driver->ops->shutdown)
+ cpu_dai->driver->ops->shutdown(substream, cpu_dai);
+
+ for (i = 0; i < rtd->num_codecs; i++) {
+ codec_dai = rtd->codec_dais[i];
+ if (codec_dai->driver->ops->shutdown)
+ codec_dai->driver->ops->shutdown(substream, codec_dai);
+ }
+
+ if (rtd->dai_link->ops->shutdown)
+ rtd->dai_link->ops->shutdown(substream);
+
+ soc_pcm_components_close(substream, NULL);
+
+ if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
+ if (snd_soc_runtime_ignore_pmdown_time(rtd)) {
+ /* powered down playback stream now */
+ snd_soc_dapm_stream_event(rtd,
+ SNDRV_PCM_STREAM_PLAYBACK,
+ SND_SOC_DAPM_STREAM_STOP);
+ } else {
+ /* start delayed pop wq here for playback streams */
+ rtd->pop_wait = 1;
+ queue_delayed_work(system_power_efficient_wq,
+ &rtd->delayed_work,
+ msecs_to_jiffies(rtd->pmdown_time));
+ }
+ } else {
+ /* capture streams can be powered down now */
+ snd_soc_dapm_stream_event(rtd, SNDRV_PCM_STREAM_CAPTURE,
+ SND_SOC_DAPM_STREAM_STOP);
+ }
+
+ mutex_unlock(&rtd->pcm_mutex);
+
+ for_each_rtdcom(rtd, rtdcom) {
+ component = rtdcom->component;
+
+ pm_runtime_mark_last_busy(component->dev);
+ pm_runtime_put_autosuspend(component->dev);
+ }
+
+ for (i = 0; i < rtd->num_codecs; i++) {
+ if (!rtd->codec_dais[i]->active)
+ pinctrl_pm_select_sleep_state(rtd->codec_dais[i]->dev);
+ }
+ if (!cpu_dai->active)
+ pinctrl_pm_select_sleep_state(cpu_dai->dev);
+
+ return 0;
+}
+
+/*
+ * Called by ALSA when the PCM substream is prepared, can set format, sample
+ * rate, etc. This function is non atomic and can be called multiple times,
+ * it can refer to the runtime info.
+ */
+static int soc_pcm_prepare(struct snd_pcm_substream *substream)
+{
+ struct snd_soc_pcm_runtime *rtd = substream->private_data;
+ struct snd_soc_component *component;
+ struct snd_soc_rtdcom_list *rtdcom;
+ struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
+ struct snd_soc_dai *codec_dai;
+ int i, ret = 0;
+
+ mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
+
+ if (rtd->dai_link->ops->prepare) {
+ ret = rtd->dai_link->ops->prepare(substream);
+ if (ret < 0) {
+ dev_err(rtd->card->dev, "ASoC: machine prepare error:"
+ " %d\n", ret);
+ goto out;
+ }
+ }
+
+ for_each_rtdcom(rtd, rtdcom) {
+ component = rtdcom->component;
+
+ if (!component->driver->ops ||
+ !component->driver->ops->prepare)
+ continue;
+
+ ret = component->driver->ops->prepare(substream);
+ if (ret < 0) {
+ dev_err(component->dev,
+ "ASoC: platform prepare error: %d\n", ret);
+ goto out;
+ }
+ }
+
+ for (i = 0; i < rtd->num_codecs; i++) {
+ codec_dai = rtd->codec_dais[i];
+ if (codec_dai->driver->ops->prepare) {
+ ret = codec_dai->driver->ops->prepare(substream,
+ codec_dai);
+ if (ret < 0) {
+ dev_err(codec_dai->dev,
+ "ASoC: codec DAI prepare error: %d\n",
+ 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,
+ "ASoC: cpu DAI prepare error: %d\n", ret);
+ goto out;
+ }
+ }
+
+ /* cancel any delayed stream shutdown that is pending */
+ if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
+ rtd->pop_wait) {
+ rtd->pop_wait = 0;
+ cancel_delayed_work(&rtd->delayed_work);
+ }
+
+ snd_soc_dapm_stream_event(rtd, substream->stream,
+ SND_SOC_DAPM_STREAM_START);
+
+ for (i = 0; i < rtd->num_codecs; i++)
+ snd_soc_dai_digital_mute(rtd->codec_dais[i], 0,
+ substream->stream);
+ snd_soc_dai_digital_mute(cpu_dai, 0, substream->stream);
+
+out:
+ mutex_unlock(&rtd->pcm_mutex);
+ return ret;
+}
+
+static void soc_pcm_codec_params_fixup(struct snd_pcm_hw_params *params,
+ unsigned int mask)
+{
+ struct snd_interval *interval;
+ int channels = hweight_long(mask);
+
+ interval = hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS);
+ interval->min = channels;
+ interval->max = channels;
+}
+
+int soc_dai_hw_params(struct snd_pcm_substream *substream,
+ struct snd_pcm_hw_params *params,
+ struct snd_soc_dai *dai)
+{
+ struct snd_soc_pcm_runtime *rtd = substream->private_data;
+ int ret;
+
+ /* perform any topology hw_params fixups before DAI */
+ if (rtd->dai_link->be_hw_params_fixup) {
+ ret = rtd->dai_link->be_hw_params_fixup(rtd, params);
+ if (ret < 0) {
+ dev_err(rtd->dev,
+ "ASoC: hw_params topology fixup failed %d\n",
+ ret);
+ return ret;
+ }
+ }
+
+ if (dai->driver->ops->hw_params) {
+ ret = dai->driver->ops->hw_params(substream, params, dai);
+ if (ret < 0) {
+ dev_err(dai->dev, "ASoC: can't set %s hw params: %d\n",
+ dai->name, ret);
+ return ret;
+ }
+ }
+
+ return 0;
+}
+
+static int soc_pcm_components_hw_free(struct snd_pcm_substream *substream,
+ struct snd_soc_component *last)
+{
+ struct snd_soc_pcm_runtime *rtd = substream->private_data;
+ struct snd_soc_rtdcom_list *rtdcom;
+ struct snd_soc_component *component;
+
+ for_each_rtdcom(rtd, rtdcom) {
+ component = rtdcom->component;
+
+ if (component == last)
+ break;
+
+ if (!component->driver->ops ||
+ !component->driver->ops->hw_free)
+ continue;
+
+ component->driver->ops->hw_free(substream);
+ }
+
+ return 0;
+}
+
+/*
+ * 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_component *component;
+ struct snd_soc_rtdcom_list *rtdcom;
+ struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
+ int i, ret = 0;
+
+ mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
+ if (rtd->dai_link->ops->hw_params) {
+ ret = rtd->dai_link->ops->hw_params(substream, params);
+ if (ret < 0) {
+ dev_err(rtd->card->dev, "ASoC: machine hw_params"
+ " failed: %d\n", ret);
+ goto out;
+ }
+ }
+
+ for (i = 0; i < rtd->num_codecs; i++) {
+ struct snd_soc_dai *codec_dai = rtd->codec_dais[i];
+ struct snd_pcm_hw_params codec_params;
+
+ /*
+ * Skip CODECs which don't support the current stream type,
+ * the idea being that if a CODEC is not used for the currently
+ * set up transfer direction, it should not need to be
+ * configured, especially since the configuration used might
+ * not even be supported by that CODEC. There may be cases
+ * however where a CODEC needs to be set up although it is
+ * actually not being used for the transfer, e.g. if a
+ * capture-only CODEC is acting as an LRCLK and/or BCLK master
+ * for the DAI link including a playback-only CODEC.
+ * If this becomes necessary, we will have to augment the
+ * machine driver setup with information on how to act, so
+ * we can do the right thing here.
+ */
+ if (!snd_soc_dai_stream_valid(codec_dai, substream->stream))
+ continue;
+
+ /* copy params for each codec */
+ codec_params = *params;
+
+ /* fixup params based on TDM slot masks */
+ if (codec_dai->tx_mask)
+ soc_pcm_codec_params_fixup(&codec_params,
+ codec_dai->tx_mask);
+ if (codec_dai->rx_mask)
+ soc_pcm_codec_params_fixup(&codec_params,
+ codec_dai->rx_mask);
+
+ ret = soc_dai_hw_params(substream, &codec_params, codec_dai);
+ if(ret < 0)
+ goto codec_err;
+
+ codec_dai->rate = params_rate(&codec_params);
+ codec_dai->channels = params_channels(&codec_params);
+ codec_dai->sample_bits = snd_pcm_format_physical_width(
+ params_format(&codec_params));
+ }
+
+ ret = soc_dai_hw_params(substream, params, cpu_dai);
+ if (ret < 0)
+ goto interface_err;
+
+ for_each_rtdcom(rtd, rtdcom) {
+ component = rtdcom->component;
+
+ if (!component->driver->ops ||
+ !component->driver->ops->hw_params)
+ continue;
+
+ ret = component->driver->ops->hw_params(substream, params);
+ if (ret < 0) {
+ dev_err(component->dev,
+ "ASoC: %s hw params failed: %d\n",
+ component->name, ret);
+ goto component_err;
+ }
+ }
+ component = NULL;
+
+ /* store the parameters for each DAIs */
+ cpu_dai->rate = params_rate(params);
+ cpu_dai->channels = params_channels(params);
+ cpu_dai->sample_bits =
+ snd_pcm_format_physical_width(params_format(params));
+
+ ret = soc_pcm_params_symmetry(substream, params);
+ if (ret)
+ goto component_err;
+out:
+ mutex_unlock(&rtd->pcm_mutex);
+ return ret;
+
+component_err:
+ soc_pcm_components_hw_free(substream, component);
+
+ if (cpu_dai->driver->ops->hw_free)
+ cpu_dai->driver->ops->hw_free(substream, cpu_dai);
+
+interface_err:
+ i = rtd->num_codecs;
+
+codec_err:
+ while (--i >= 0) {
+ struct snd_soc_dai *codec_dai = rtd->codec_dais[i];
+ if (codec_dai->driver->ops->hw_free)
+ codec_dai->driver->ops->hw_free(substream, codec_dai);
+ codec_dai->rate = 0;
+ }
+
+ if (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_dai *cpu_dai = rtd->cpu_dai;
+ struct snd_soc_dai *codec_dai;
+ bool playback = substream->stream == SNDRV_PCM_STREAM_PLAYBACK;
+ int i;
+
+ mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
+
+ /* clear the corresponding DAIs parameters when going to be inactive */
+ if (cpu_dai->active == 1) {
+ cpu_dai->rate = 0;
+ cpu_dai->channels = 0;
+ cpu_dai->sample_bits = 0;
+ }
+
+ for (i = 0; i < rtd->num_codecs; i++) {
+ codec_dai = rtd->codec_dais[i];
+ if (codec_dai->active == 1) {
+ codec_dai->rate = 0;
+ codec_dai->channels = 0;
+ codec_dai->sample_bits = 0;
+ }
+ }
+
+ /* apply codec digital mute */
+ for (i = 0; i < rtd->num_codecs; i++) {
+ if ((playback && rtd->codec_dais[i]->playback_active == 1) ||
+ (!playback && rtd->codec_dais[i]->capture_active == 1))
+ snd_soc_dai_digital_mute(rtd->codec_dais[i], 1,
+ substream->stream);
+ }
+
+ /* free any machine hw params */
+ if (rtd->dai_link->ops->hw_free)
+ rtd->dai_link->ops->hw_free(substream);
+
+ /* free any component resources */
+ soc_pcm_components_hw_free(substream, NULL);
+
+ /* now free hw params for the DAIs */
+ for (i = 0; i < rtd->num_codecs; i++) {
+ codec_dai = rtd->codec_dais[i];
+ 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_component *component;
+ struct snd_soc_rtdcom_list *rtdcom;
+ struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
+ struct snd_soc_dai *codec_dai;
+ int i, ret;
+
+ for (i = 0; i < rtd->num_codecs; i++) {
+ codec_dai = rtd->codec_dais[i];
+ if (codec_dai->driver->ops->trigger) {
+ ret = codec_dai->driver->ops->trigger(substream,
+ cmd, codec_dai);
+ if (ret < 0)
+ return ret;
+ }
+ }
+
+ for_each_rtdcom(rtd, rtdcom) {
+ component = rtdcom->component;
+
+ if (!component->driver->ops ||
+ !component->driver->ops->trigger)
+ continue;
+
+ ret = component->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;
+ }
+
+ if (rtd->dai_link->ops->trigger) {
+ ret = rtd->dai_link->ops->trigger(substream, cmd);
+ 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_dai *cpu_dai = rtd->cpu_dai;
+ struct snd_soc_dai *codec_dai;
+ int i, ret;
+
+ for (i = 0; i < rtd->num_codecs; i++) {
+ codec_dai = rtd->codec_dais[i];
+ if (codec_dai->driver->ops->bespoke_trigger) {
+ ret = codec_dai->driver->ops->bespoke_trigger(substream,
+ cmd, codec_dai);
+ 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, component driver has the delay callback, then
+ * 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_component *component;
+ struct snd_soc_rtdcom_list *rtdcom;
+ struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
+ struct snd_soc_dai *codec_dai;
+ struct snd_pcm_runtime *runtime = substream->runtime;
+ snd_pcm_uframes_t offset = 0;
+ snd_pcm_sframes_t delay = 0;
+ snd_pcm_sframes_t codec_delay = 0;
+ int i;
+
+ /* clearing the previous total delay */
+ runtime->delay = 0;
+
+ for_each_rtdcom(rtd, rtdcom) {
+ component = rtdcom->component;
+
+ if (!component->driver->ops ||
+ !component->driver->ops->pointer)
+ continue;
+
+ /* FIXME: use 1st pointer */
+ offset = component->driver->ops->pointer(substream);
+ break;
+ }
+ /* base delay if assigned in pointer callback */
+ delay = runtime->delay;
+
+ if (cpu_dai->driver->ops->delay)
+ delay += cpu_dai->driver->ops->delay(substream, cpu_dai);
+
+ for (i = 0; i < rtd->num_codecs; i++) {
+ codec_dai = rtd->codec_dais[i];
+ if (codec_dai->driver->ops->delay)
+ codec_delay = max(codec_delay,
+ codec_dai->driver->ops->delay(substream,
+ codec_dai));
+ }
+ delay += codec_delay;
+
+ 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
+ if (fe->debugfs_dpcm_root)
+ dpcm->debugfs_state = debugfs_create_u32(be->dai_link->name, 0644,
+ fe->debugfs_dpcm_root, &dpcm->state);
+#endif
+ return 1;
+}
+
+/* reparent a BE onto another FE */
+static void dpcm_be_reparent(struct snd_soc_pcm_runtime *fe,
+ struct snd_soc_pcm_runtime *be, int stream)
+{
+ struct snd_soc_dpcm *dpcm;
+ struct snd_pcm_substream *fe_substream, *be_substream;
+
+ /* reparent if BE is connected to other FEs */
+ if (!be->dpcm[stream].users)
+ return;
+
+ be_substream = snd_soc_dpcm_get_substream(be, stream);
+
+ list_for_each_entry(dpcm, &be->dpcm[stream].fe_clients, list_fe) {
+ if (dpcm->fe == fe)
+ continue;
+
+ dev_dbg(fe->dev, "reparent %s path %s %s %s\n",
+ stream ? "capture" : "playback",
+ dpcm->fe->dai_link->name,
+ stream ? "<-" : "->", dpcm->be->dai_link->name);
+
+ fe_substream = snd_soc_dpcm_get_substream(dpcm->fe, stream);
+ be_substream->runtime = fe_substream->runtime;
+ break;
+ }
+}
+
+/* disconnect a BE and FE */
+void dpcm_be_disconnect(struct snd_soc_pcm_runtime *fe, int stream)
+{
+ struct snd_soc_dpcm *dpcm, *d;
+
+ list_for_each_entry_safe(dpcm, d, &fe->dpcm[stream].be_clients, list_be) {
+ dev_dbg(fe->dev, "ASoC: BE %s disconnect check for %s\n",
+ stream ? "capture" : "playback",
+ dpcm->be->dai_link->name);
+
+ if (dpcm->state != SND_SOC_DPCM_LINK_STATE_FREE)
+ continue;
+
+ dev_dbg(fe->dev, "freed DSP %s path %s %s %s\n",
+ stream ? "capture" : "playback", fe->dai_link->name,
+ stream ? "<-" : "->", dpcm->be->dai_link->name);
+
+ /* BEs still alive need new FE */
+ dpcm_be_reparent(fe, dpcm->be, stream);
+
+#ifdef CONFIG_DEBUG_FS
+ debugfs_remove(dpcm->debugfs_state);
+#endif
+ list_del(&dpcm->list_be);
+ list_del(&dpcm->list_fe);
+ kfree(dpcm);
+ }
+}
+
+/* get BE for DAI widget and stream */
+static struct snd_soc_pcm_runtime *dpcm_get_be(struct snd_soc_card *card,
+ struct snd_soc_dapm_widget *widget, int stream)
+{
+ struct snd_soc_pcm_runtime *be;
+ int i;
+
+ dev_dbg(card->dev, "ASoC: find BE for widget %s\n", widget->name);
+
+ if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
+ list_for_each_entry(be, &card->rtd_list, list) {
+
+ if (!be->dai_link->no_pcm)
+ continue;
+
+ dev_dbg(card->dev, "ASoC: try BE : %s\n",
+ be->cpu_dai->playback_widget ?
+ be->cpu_dai->playback_widget->name : "(not set)");
+
+ if (be->cpu_dai->playback_widget == widget)
+ return be;
+
+ for (i = 0; i < be->num_codecs; i++) {
+ struct snd_soc_dai *dai = be->codec_dais[i];
+ if (dai->playback_widget == widget)
+ return be;
+ }
+ }
+ } else {
+
+ list_for_each_entry(be, &card->rtd_list, list) {
+
+ if (!be->dai_link->no_pcm)
+ continue;
+
+ dev_dbg(card->dev, "ASoC: try BE %s\n",
+ be->cpu_dai->capture_widget ?
+ be->cpu_dai->capture_widget->name : "(not set)");
+
+ if (be->cpu_dai->capture_widget == widget)
+ return be;
+
+ for (i = 0; i < be->num_codecs; i++) {
+ struct snd_soc_dai *dai = be->codec_dais[i];
+ if (dai->capture_widget == widget)
+ return be;
+ }
+ }
+ }
+
+ /* dai link name and stream name set correctly ? */
+ dev_err(card->dev, "ASoC: can't get %s BE for %s\n",
+ stream ? "capture" : "playback", widget->name);
+ return NULL;
+}
+
+static inline struct snd_soc_dapm_widget *
+ dai_get_widget(struct snd_soc_dai *dai, int stream)
+{
+ if (stream == SNDRV_PCM_STREAM_PLAYBACK)
+ return dai->playback_widget;
+ else
+ return 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 bool dpcm_end_walk_at_be(struct snd_soc_dapm_widget *widget,
+ enum snd_soc_dapm_direction dir)
+{
+ struct snd_soc_card *card = widget->dapm->card;
+ struct snd_soc_pcm_runtime *rtd;
+ int i;
+
+ if (dir == SND_SOC_DAPM_DIR_OUT) {
+ list_for_each_entry(rtd, &card->rtd_list, list) {
+ if (!rtd->dai_link->no_pcm)
+ continue;
+
+ if (rtd->cpu_dai->playback_widget == widget)
+ return true;
+
+ for (i = 0; i < rtd->num_codecs; ++i) {
+ struct snd_soc_dai *dai = rtd->codec_dais[i];
+ if (dai->playback_widget == widget)
+ return true;
+ }
+ }
+ } else { /* SND_SOC_DAPM_DIR_IN */
+ list_for_each_entry(rtd, &card->rtd_list, list) {
+ if (!rtd->dai_link->no_pcm)
+ continue;
+
+ if (rtd->cpu_dai->capture_widget == widget)
+ return true;
+
+ for (i = 0; i < rtd->num_codecs; ++i) {
+ struct snd_soc_dai *dai = rtd->codec_dais[i];
+ if (dai->capture_widget == widget)
+ return true;
+ }
+ }
+ }
+
+ return false;
+}
+
+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;
+ int paths;
+
+ /* get number of valid DAI paths and their widgets */
+ paths = snd_soc_dapm_dai_get_connected_widgets(cpu_dai, stream, list,
+ dpcm_end_walk_at_be);
+
+ dev_dbg(fe->dev, "ASoC: found %d audio %s paths\n", paths,
+ stream ? "capture" : "playback");
+
+ return paths;
+}
+
+static int dpcm_prune_paths(struct snd_soc_pcm_runtime *fe, int stream,
+ struct snd_soc_dapm_widget_list **list_)
+{
+ struct snd_soc_dpcm *dpcm;
+ struct snd_soc_dapm_widget_list *list = *list_;
+ struct snd_soc_dapm_widget *widget;
+ int prune = 0;
+
+ /* Destroy any old FE <--> BE connections */
+ list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
+ unsigned int i;
+
+ /* is there a valid CPU DAI widget for this BE */
+ widget = dai_get_widget(dpcm->be->cpu_dai, 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 */
+ for (i = 0; i < dpcm->be->num_codecs; i++) {
+ struct snd_soc_dai *dai = dpcm->be->codec_dais[i];
+ widget = dai_get_widget(dai, stream);
+
+ /* prune the BE if it's no longer in our active list */
+ if (widget && widget_in_list(list, widget))
+ continue;
+ }
+
+ dev_dbg(fe->dev, "ASoC: pruning %s BE %s for %s\n",
+ stream ? "capture" : "playback",
+ dpcm->be->dai_link->name, fe->dai_link->name);
+ dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE;
+ dpcm->be->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_BE;
+ prune++;
+ }
+
+ dev_dbg(fe->dev, "ASoC: found %d old BE paths for pruning\n", prune);
+ return prune;
+}
+
+static int dpcm_add_paths(struct snd_soc_pcm_runtime *fe, int stream,
+ struct snd_soc_dapm_widget_list **list_)
+{
+ struct snd_soc_card *card = fe->card;
+ struct snd_soc_dapm_widget_list *list = *list_;
+ struct snd_soc_pcm_runtime *be;
+ int i, new = 0, err;
+
+ /* Create any new FE <--> BE connections */
+ for (i = 0; i < list->num_widgets; i++) {
+
+ switch (list->widgets[i]->id) {
+ case snd_soc_dapm_dai_in:
+ if (stream != SNDRV_PCM_STREAM_PLAYBACK)
+ continue;
+ break;
+ case snd_soc_dapm_dai_out:
+ if (stream != SNDRV_PCM_STREAM_CAPTURE)
+ continue;
+ break;
+ default:
+ continue;
+ }
+
+ /* is there a valid BE rtd for this widget */
+ be = dpcm_get_be(card, list->widgets[i], stream);
+ if (!be) {
+ dev_err(fe->dev, "ASoC: no BE found for %s\n",
+ list->widgets[i]->name);
+ continue;
+ }
+
+ /* make sure BE is a real BE */
+ if (!be->dai_link->no_pcm)
+ continue;
+
+ /* don't connect if FE is not running */
+ if (!fe->dpcm[stream].runtime && !fe->fe_compr)
+ continue;
+
+ /* newly connected FE and BE */
+ err = dpcm_be_connect(fe, be, stream);
+ if (err < 0) {
+ dev_err(fe->dev, "ASoC: can't connect %s\n",
+ list->widgets[i]->name);
+ break;
+ } else if (err == 0) /* already connected */
+ continue;
+
+ /* new */
+ be->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_BE;
+ new++;
+ }
+
+ dev_dbg(fe->dev, "ASoC: found %d new BE paths\n", new);
+ return new;
+}
+
+/*
+ * Find the corresponding BE DAIs that source or sink audio to this
+ * FE substream.
+ */
+int dpcm_process_paths(struct snd_soc_pcm_runtime *fe,
+ int stream, struct snd_soc_dapm_widget_list **list, int new)
+{
+ if (new)
+ return dpcm_add_paths(fe, stream, list);
+ else
+ return dpcm_prune_paths(fe, stream, list);
+}
+
+void dpcm_clear_pending_state(struct snd_soc_pcm_runtime *fe, int stream)
+{
+ struct snd_soc_dpcm *dpcm;
+
+ list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be)
+ dpcm->be->dpcm[stream].runtime_update =
+ SND_SOC_DPCM_UPDATE_NO;
+}
+
+static void dpcm_be_dai_startup_unwind(struct snd_soc_pcm_runtime *fe,
+ int stream)
+{
+ struct snd_soc_dpcm *dpcm;
+
+ /* disable any enabled and non active backends */
+ list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
+
+ struct snd_soc_pcm_runtime *be = dpcm->be;
+ struct snd_pcm_substream *be_substream =
+ snd_soc_dpcm_get_substream(be, stream);
+
+ if (be->dpcm[stream].users == 0)
+ dev_err(be->dev, "ASoC: no users %s at close - state %d\n",
+ stream ? "capture" : "playback",
+ be->dpcm[stream].state);
+
+ if (--be->dpcm[stream].users != 0)
+ continue;
+
+ if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN)
+ continue;
+
+ soc_pcm_close(be_substream);
+ be_substream->runtime = NULL;
+ be->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE;
+ }
+}
+
+int dpcm_be_dai_startup(struct snd_soc_pcm_runtime *fe, int stream)
+{
+ struct snd_soc_dpcm *dpcm;
+ int err, count = 0;
+
+ /* only startup BE DAIs that are either sinks or sources to this FE DAI */
+ list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
+
+ struct snd_soc_pcm_runtime *be = dpcm->be;
+ struct snd_pcm_substream *be_substream =
+ snd_soc_dpcm_get_substream(be, stream);
+
+ if (!be_substream) {
+ dev_err(be->dev, "ASoC: no backend %s stream\n",
+ stream ? "capture" : "playback");
+ continue;
+ }
+
+ /* is this op for this BE ? */
+ if (!snd_soc_dpcm_be_can_update(fe, be, stream))
+ continue;
+
+ /* first time the dpcm is open ? */
+ if (be->dpcm[stream].users == DPCM_MAX_BE_USERS)
+ dev_err(be->dev, "ASoC: too many users %s at open %d\n",
+ stream ? "capture" : "playback",
+ be->dpcm[stream].state);
+
+ if (be->dpcm[stream].users++ != 0)
+ continue;
+
+ if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_NEW) &&
+ (be->dpcm[stream].state != SND_SOC_DPCM_STATE_CLOSE))
+ continue;
+
+ dev_dbg(be->dev, "ASoC: open %s BE %s\n",
+ stream ? "capture" : "playback", be->dai_link->name);
+
+ be_substream->runtime = be->dpcm[stream].runtime;
+ err = soc_pcm_open(be_substream);
+ if (err < 0) {
+ dev_err(be->dev, "ASoC: BE open failed %d\n", err);
+ be->dpcm[stream].users--;
+ if (be->dpcm[stream].users < 0)
+ dev_err(be->dev, "ASoC: no users %s at unwind %d\n",
+ stream ? "capture" : "playback",
+ be->dpcm[stream].state);
+
+ be->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE;
+ goto unwind;
+ }
+
+ be->dpcm[stream].state = SND_SOC_DPCM_STATE_OPEN;
+ count++;
+ }
+
+ return count;
+
+unwind:
+ /* disable any enabled and non active backends */
+ list_for_each_entry_continue_reverse(dpcm, &fe->dpcm[stream].be_clients, list_be) {
+ struct snd_soc_pcm_runtime *be = dpcm->be;
+ struct snd_pcm_substream *be_substream =
+ snd_soc_dpcm_get_substream(be, stream);
+
+ if (!snd_soc_dpcm_be_can_update(fe, be, stream))
+ continue;
+
+ if (be->dpcm[stream].users == 0)
+ dev_err(be->dev, "ASoC: no users %s at close %d\n",
+ stream ? "capture" : "playback",
+ be->dpcm[stream].state);
+
+ if (--be->dpcm[stream].users != 0)
+ continue;
+
+ if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN)
+ continue;
+
+ soc_pcm_close(be_substream);
+ be_substream->runtime = NULL;
+ be->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE;
+ }
+
+ return err;
+}
+
+static void dpcm_init_runtime_hw(struct snd_pcm_runtime *runtime,
+ struct snd_soc_pcm_stream *stream)
+{
+ runtime->hw.rate_min = stream->rate_min;
+ runtime->hw.rate_max = stream->rate_max;
+ runtime->hw.channels_min = stream->channels_min;
+ runtime->hw.channels_max = stream->channels_max;
+ if (runtime->hw.formats)
+ runtime->hw.formats &= stream->formats;
+ else
+ runtime->hw.formats = stream->formats;
+ runtime->hw.rates = stream->rates;
+}
+
+static void dpcm_runtime_merge_format(struct snd_pcm_substream *substream,
+ u64 *formats)
+{
+ struct snd_soc_pcm_runtime *fe = substream->private_data;
+ struct snd_soc_dpcm *dpcm;
+ int stream = substream->stream;
+
+ if (!fe->dai_link->dpcm_merged_format)
+ return;
+
+ /*
+ * It returns merged BE codec format
+ * if FE want to use it (= dpcm_merged_format)
+ */
+
+ list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
+ struct snd_soc_pcm_runtime *be = dpcm->be;
+ struct snd_soc_dai_driver *codec_dai_drv;
+ struct snd_soc_pcm_stream *codec_stream;
+ int i;
+
+ for (i = 0; i < be->num_codecs; i++) {
+ /*
+ * Skip CODECs which don't support the current stream
+ * type. See soc_pcm_init_runtime_hw() for more details
+ */
+ if (!snd_soc_dai_stream_valid(be->codec_dais[i],
+ stream))
+ continue;
+
+ codec_dai_drv = be->codec_dais[i]->driver;
+ if (stream == SNDRV_PCM_STREAM_PLAYBACK)
+ codec_stream = &codec_dai_drv->playback;
+ else
+ codec_stream = &codec_dai_drv->capture;
+
+ *formats &= codec_stream->formats;
+ }
+ }
+}
+
+static void dpcm_runtime_merge_chan(struct snd_pcm_substream *substream,
+ unsigned int *channels_min,
+ unsigned int *channels_max)
+{
+ struct snd_soc_pcm_runtime *fe = substream->private_data;
+ struct snd_soc_dpcm *dpcm;
+ int stream = substream->stream;
+
+ if (!fe->dai_link->dpcm_merged_chan)
+ return;
+
+ /*
+ * It returns merged BE codec channel;
+ * if FE want to use it (= dpcm_merged_chan)
+ */
+
+ list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
+ struct snd_soc_pcm_runtime *be = dpcm->be;
+ struct snd_soc_dai_driver *cpu_dai_drv = be->cpu_dai->driver;
+ struct snd_soc_dai_driver *codec_dai_drv;
+ struct snd_soc_pcm_stream *codec_stream;
+ struct snd_soc_pcm_stream *cpu_stream;
+
+ if (stream == SNDRV_PCM_STREAM_PLAYBACK)
+ cpu_stream = &cpu_dai_drv->playback;
+ else
+ cpu_stream = &cpu_dai_drv->capture;
+
+ *channels_min = max(*channels_min, cpu_stream->channels_min);
+ *channels_max = min(*channels_max, cpu_stream->channels_max);
+
+ /*
+ * chan min/max cannot be enforced if there are multiple CODEC
+ * DAIs connected to a single CPU DAI, use CPU DAI's directly
+ */
+ if (be->num_codecs == 1) {
+ codec_dai_drv = be->codec_dais[0]->driver;
+
+ if (stream == SNDRV_PCM_STREAM_PLAYBACK)
+ codec_stream = &codec_dai_drv->playback;
+ else
+ codec_stream = &codec_dai_drv->capture;
+
+ *channels_min = max(*channels_min,
+ codec_stream->channels_min);
+ *channels_max = min(*channels_max,
+ codec_stream->channels_max);
+ }
+ }
+}
+
+static void dpcm_runtime_merge_rate(struct snd_pcm_substream *substream,
+ unsigned int *rates,
+ unsigned int *rate_min,
+ unsigned int *rate_max)
+{
+ struct snd_soc_pcm_runtime *fe = substream->private_data;
+ struct snd_soc_dpcm *dpcm;
+ int stream = substream->stream;
+
+ if (!fe->dai_link->dpcm_merged_rate)
+ return;
+
+ /*
+ * It returns merged BE codec channel;
+ * if FE want to use it (= dpcm_merged_chan)
+ */
+
+ list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
+ struct snd_soc_pcm_runtime *be = dpcm->be;
+ struct snd_soc_dai_driver *cpu_dai_drv = be->cpu_dai->driver;
+ struct snd_soc_dai_driver *codec_dai_drv;
+ struct snd_soc_pcm_stream *codec_stream;
+ struct snd_soc_pcm_stream *cpu_stream;
+ int i;
+
+ if (stream == SNDRV_PCM_STREAM_PLAYBACK)
+ cpu_stream = &cpu_dai_drv->playback;
+ else
+ cpu_stream = &cpu_dai_drv->capture;
+
+ *rate_min = max(*rate_min, cpu_stream->rate_min);
+ *rate_max = min_not_zero(*rate_max, cpu_stream->rate_max);
+ *rates = snd_pcm_rate_mask_intersect(*rates, cpu_stream->rates);
+
+ for (i = 0; i < be->num_codecs; i++) {
+ /*
+ * Skip CODECs which don't support the current stream
+ * type. See soc_pcm_init_runtime_hw() for more details
+ */
+ if (!snd_soc_dai_stream_valid(be->codec_dais[i],
+ stream))
+ continue;
+
+ codec_dai_drv = be->codec_dais[i]->driver;
+ if (stream == SNDRV_PCM_STREAM_PLAYBACK)
+ codec_stream = &codec_dai_drv->playback;
+ else
+ codec_stream = &codec_dai_drv->capture;
+
+ *rate_min = max(*rate_min, codec_stream->rate_min);
+ *rate_max = min_not_zero(*rate_max,
+ codec_stream->rate_max);
+ *rates = snd_pcm_rate_mask_intersect(*rates,
+ codec_stream->rates);
+ }
+ }
+}
+
+static void dpcm_set_fe_runtime(struct snd_pcm_substream *substream)
+{
+ struct snd_pcm_runtime *runtime = substream->runtime;
+ struct snd_soc_pcm_runtime *rtd = substream->private_data;
+ struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
+ struct snd_soc_dai_driver *cpu_dai_drv = cpu_dai->driver;
+
+ if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
+ dpcm_init_runtime_hw(runtime, &cpu_dai_drv->playback);
+ else
+ dpcm_init_runtime_hw(runtime, &cpu_dai_drv->capture);
+
+ dpcm_runtime_merge_format(substream, &runtime->hw.formats);
+ dpcm_runtime_merge_chan(substream, &runtime->hw.channels_min,
+ &runtime->hw.channels_max);
+ dpcm_runtime_merge_rate(substream, &runtime->hw.rates,
+ &runtime->hw.rate_min, &runtime->hw.rate_max);
+}
+
+static int dpcm_fe_dai_do_trigger(struct snd_pcm_substream *substream, int cmd);
+
+/* Set FE's runtime_update state; the state is protected via PCM stream lock
+ * for avoiding the race with trigger callback.
+ * If the state is unset and a trigger is pending while the previous operation,
+ * process the pending trigger action here.
+ */
+static void dpcm_set_fe_update_state(struct snd_soc_pcm_runtime *fe,
+ int stream, enum snd_soc_dpcm_update state)
+{
+ struct snd_pcm_substream *substream =
+ snd_soc_dpcm_get_substream(fe, stream);
+
+ snd_pcm_stream_lock_irq(substream);
+ if (state == SND_SOC_DPCM_UPDATE_NO && fe->dpcm[stream].trigger_pending) {
+ dpcm_fe_dai_do_trigger(substream,
+ fe->dpcm[stream].trigger_pending - 1);
+ fe->dpcm[stream].trigger_pending = 0;
+ }
+ fe->dpcm[stream].runtime_update = state;
+ snd_pcm_stream_unlock_irq(substream);
+}
+
+static int dpcm_apply_symmetry(struct snd_pcm_substream *fe_substream,
+ int stream)
+{
+ struct snd_soc_dpcm *dpcm;
+ struct snd_soc_pcm_runtime *fe = fe_substream->private_data;
+ struct snd_soc_dai *fe_cpu_dai = fe->cpu_dai;
+ int err;
+
+ /* apply symmetry for FE */
+ if (soc_pcm_has_symmetry(fe_substream))
+ fe_substream->runtime->hw.info |= SNDRV_PCM_INFO_JOINT_DUPLEX;
+
+ /* Symmetry only applies if we've got an active stream. */
+ if (fe_cpu_dai->active) {
+ err = soc_pcm_apply_symmetry(fe_substream, fe_cpu_dai);
+ if (err < 0)
+ return err;
+ }
+
+ /* apply symmetry for BE */
+ 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);
+ struct snd_soc_pcm_runtime *rtd = be_substream->private_data;
+ int i;
+
+ if (rtd->dai_link->be_hw_params_fixup)
+ continue;
+
+ if (soc_pcm_has_symmetry(be_substream))
+ be_substream->runtime->hw.info |= SNDRV_PCM_INFO_JOINT_DUPLEX;
+
+ /* Symmetry only applies if we've got an active stream. */
+ if (rtd->cpu_dai->active) {
+ err = soc_pcm_apply_symmetry(fe_substream,
+ rtd->cpu_dai);
+ if (err < 0)
+ return err;
+ }
+
+ for (i = 0; i < rtd->num_codecs; i++) {
+ if (rtd->codec_dais[i]->active) {
+ err = soc_pcm_apply_symmetry(fe_substream,
+ rtd->codec_dais[i]);
+ if (err < 0)
+ return err;
+ }
+ }
+ }
+
+ return 0;
+}
+
+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;
+
+ dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE);
+
+ ret = dpcm_be_dai_startup(fe, fe_substream->stream);
+ if (ret < 0) {
+ dev_err(fe->dev,"ASoC: failed to start some BEs %d\n", ret);
+ goto be_err;
+ }
+
+ dev_dbg(fe->dev, "ASoC: open FE %s\n", fe->dai_link->name);
+
+ /* start the DAI frontend */
+ ret = soc_pcm_open(fe_substream);
+ if (ret < 0) {
+ dev_err(fe->dev,"ASoC: failed to start FE %d\n", ret);
+ goto unwind;
+ }
+
+ fe->dpcm[stream].state = SND_SOC_DPCM_STATE_OPEN;
+
+ dpcm_set_fe_runtime(fe_substream);
+ snd_pcm_limit_hw_rates(runtime);
+
+ ret = dpcm_apply_symmetry(fe_substream, stream);
+ if (ret < 0) {
+ dev_err(fe->dev, "ASoC: failed to apply dpcm symmetry %d\n",
+ ret);
+ goto unwind;
+ }
+
+ dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
+ return 0;
+
+unwind:
+ dpcm_be_dai_startup_unwind(fe, fe_substream->stream);
+be_err:
+ dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
+ return ret;
+}
+
+int dpcm_be_dai_shutdown(struct snd_soc_pcm_runtime *fe, int stream)
+{
+ struct snd_soc_dpcm *dpcm;
+
+ /* only shutdown BEs that are either sinks or sources to this FE DAI */
+ list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
+
+ struct snd_soc_pcm_runtime *be = dpcm->be;
+ struct snd_pcm_substream *be_substream =
+ snd_soc_dpcm_get_substream(be, stream);
+
+ /* is this op for this BE ? */
+ if (!snd_soc_dpcm_be_can_update(fe, be, stream))
+ continue;
+
+ if (be->dpcm[stream].users == 0)
+ dev_err(be->dev, "ASoC: no users %s at close - state %d\n",
+ stream ? "capture" : "playback",
+ be->dpcm[stream].state);
+
+ if (--be->dpcm[stream].users != 0)
+ continue;
+
+ if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE) &&
+ (be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN)) {
+ soc_pcm_hw_free(be_substream);
+ be->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_FREE;
+ }
+
+ dev_dbg(be->dev, "ASoC: close BE %s\n",
+ be->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;
+
+ dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE);
+
+ /* shutdown the BEs */
+ dpcm_be_dai_shutdown(fe, substream->stream);
+
+ dev_dbg(fe->dev, "ASoC: close FE %s\n", fe->dai_link->name);
+
+ /* now shutdown the frontend */
+ soc_pcm_close(substream);
+
+ /* run the stream event for each BE */
+ dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_STOP);
+
+ fe->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE;
+ dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
+ return 0;
+}
+
+int dpcm_be_dai_hw_free(struct snd_soc_pcm_runtime *fe, int stream)
+{
+ struct snd_soc_dpcm *dpcm;
+
+ /* only hw_params backends that are either sinks or sources
+ * to this frontend DAI */
+ list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
+
+ struct snd_soc_pcm_runtime *be = dpcm->be;
+ struct snd_pcm_substream *be_substream =
+ snd_soc_dpcm_get_substream(be, stream);
+
+ /* is this op for this BE ? */
+ if (!snd_soc_dpcm_be_can_update(fe, be, stream))
+ continue;
+
+ /* only free hw when no longer used - check all FEs */
+ if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream))
+ continue;
+
+ /* do not free hw if this BE is used by other FE */
+ if (be->dpcm[stream].users > 1)
+ continue;
+
+ if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) &&
+ (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PREPARE) &&
+ (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE) &&
+ (be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED) &&
+ (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP) &&
+ (be->dpcm[stream].state != SND_SOC_DPCM_STATE_SUSPEND))
+ continue;
+
+ dev_dbg(be->dev, "ASoC: hw_free BE %s\n",
+ be->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);
+ dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE);
+
+ dev_dbg(fe->dev, "ASoC: hw_free FE %s\n", fe->dai_link->name);
+
+ /* call hw_free on the frontend */
+ err = soc_pcm_hw_free(substream);
+ if (err < 0)
+ dev_err(fe->dev,"ASoC: hw_free FE %s failed\n",
+ fe->dai_link->name);
+
+ /* only hw_params backends that are either sinks or sources
+ * to this frontend DAI */
+ err = dpcm_be_dai_hw_free(fe, stream);
+
+ fe->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_FREE;
+ dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
+
+ mutex_unlock(&fe->card->mutex);
+ return 0;
+}
+
+int dpcm_be_dai_hw_params(struct snd_soc_pcm_runtime *fe, int stream)
+{
+ struct snd_soc_dpcm *dpcm;
+ int ret;
+
+ list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
+
+ struct snd_soc_pcm_runtime *be = dpcm->be;
+ struct snd_pcm_substream *be_substream =
+ snd_soc_dpcm_get_substream(be, stream);
+
+ /* is this op for this BE ? */
+ if (!snd_soc_dpcm_be_can_update(fe, be, stream))
+ continue;
+
+ /* copy params for each dpcm */
+ memcpy(&dpcm->hw_params, &fe->dpcm[stream].hw_params,
+ sizeof(struct snd_pcm_hw_params));
+
+ /* perform any hw_params fixups */
+ if (be->dai_link->be_hw_params_fixup) {
+ ret = be->dai_link->be_hw_params_fixup(be,
+ &dpcm->hw_params);
+ if (ret < 0) {
+ dev_err(be->dev,
+ "ASoC: hw_params BE fixup failed %d\n",
+ ret);
+ goto unwind;
+ }
+ }
+
+ /* only allow hw_params() if no connected FEs are running */
+ if (!snd_soc_dpcm_can_be_params(fe, be, stream))
+ continue;
+
+ if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN) &&
+ (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) &&
+ (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE))
+ continue;
+
+ dev_dbg(be->dev, "ASoC: hw_params BE %s\n",
+ be->dai_link->name);
+
+ ret = soc_pcm_hw_params(be_substream, &dpcm->hw_params);
+ if (ret < 0) {
+ dev_err(dpcm->be->dev,
+ "ASoC: hw_params BE failed %d\n", ret);
+ goto unwind;
+ }
+
+ be->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_PARAMS;
+ }
+ return 0;
+
+unwind:
+ /* disable any enabled and non active backends */
+ list_for_each_entry_continue_reverse(dpcm, &fe->dpcm[stream].be_clients, list_be) {
+ struct snd_soc_pcm_runtime *be = dpcm->be;
+ struct snd_pcm_substream *be_substream =
+ snd_soc_dpcm_get_substream(be, stream);
+
+ if (!snd_soc_dpcm_be_can_update(fe, be, stream))
+ continue;
+
+ /* only allow hw_free() if no connected FEs are running */
+ if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream))
+ continue;
+
+ if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_OPEN) &&
+ (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_PARAMS) &&
+ (be->dpcm[stream].state != SND_SOC_DPCM_STATE_HW_FREE) &&
+ (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP))
+ continue;
+
+ soc_pcm_hw_free(be_substream);
+ }
+
+ return ret;
+}
+
+static int dpcm_fe_dai_hw_params(struct snd_pcm_substream *substream,
+ struct snd_pcm_hw_params *params)
+{
+ struct snd_soc_pcm_runtime *fe = substream->private_data;
+ int ret, stream = substream->stream;
+
+ mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
+ dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE);
+
+ memcpy(&fe->dpcm[substream->stream].hw_params, params,
+ sizeof(struct snd_pcm_hw_params));
+ ret = dpcm_be_dai_hw_params(fe, substream->stream);
+ if (ret < 0) {
+ dev_err(fe->dev,"ASoC: hw_params BE failed %d\n", ret);
+ goto out;
+ }
+
+ dev_dbg(fe->dev, "ASoC: hw_params FE %s rate %d chan %x fmt %d\n",
+ fe->dai_link->name, params_rate(params),
+ params_channels(params), params_format(params));
+
+ /* call hw_params on the frontend */
+ ret = soc_pcm_hw_params(substream, params);
+ if (ret < 0) {
+ dev_err(fe->dev,"ASoC: hw_params FE failed %d\n", ret);
+ dpcm_be_dai_hw_free(fe, stream);
+ } else
+ fe->dpcm[stream].state = SND_SOC_DPCM_STATE_HW_PARAMS;
+
+out:
+ dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
+ mutex_unlock(&fe->card->mutex);
+ return ret;
+}
+
+static int dpcm_do_trigger(struct snd_soc_dpcm *dpcm,
+ struct snd_pcm_substream *substream, int cmd)
+{
+ int ret;
+
+ dev_dbg(dpcm->be->dev, "ASoC: trigger BE %s cmd %d\n",
+ dpcm->be->dai_link->name, cmd);
+
+ ret = soc_pcm_trigger(substream, cmd);
+ if (ret < 0)
+ dev_err(dpcm->be->dev,"ASoC: trigger BE failed %d\n", ret);
+
+ return ret;
+}
+
+int dpcm_be_dai_trigger(struct snd_soc_pcm_runtime *fe, int stream,
+ int cmd)
+{
+ struct snd_soc_dpcm *dpcm;
+ int ret = 0;
+
+ list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
+
+ struct snd_soc_pcm_runtime *be = dpcm->be;
+ struct snd_pcm_substream *be_substream =
+ snd_soc_dpcm_get_substream(be, stream);
+
+ /* is this op for this BE ? */
+ if (!snd_soc_dpcm_be_can_update(fe, be, stream))
+ continue;
+
+ switch (cmd) {
+ case SNDRV_PCM_TRIGGER_START:
+ if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_PREPARE) &&
+ (be->dpcm[stream].state != SND_SOC_DPCM_STATE_STOP))
+ continue;
+
+ ret = dpcm_do_trigger(dpcm, be_substream, cmd);
+ if (ret)
+ return ret;
+
+ be->dpcm[stream].state = SND_SOC_DPCM_STATE_START;
+ break;
+ case SNDRV_PCM_TRIGGER_RESUME:
+ if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_SUSPEND))
+ continue;
+
+ ret = dpcm_do_trigger(dpcm, be_substream, cmd);
+ if (ret)
+ return ret;
+
+ be->dpcm[stream].state = SND_SOC_DPCM_STATE_START;
+ break;
+ case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
+ if ((be->dpcm[stream].state != SND_SOC_DPCM_STATE_PAUSED))
+ continue;
+
+ ret = dpcm_do_trigger(dpcm, be_substream, cmd);
+ if (ret)
+ return ret;
+
+ be->dpcm[stream].state = SND_SOC_DPCM_STATE_START;
+ break;
+ case SNDRV_PCM_TRIGGER_STOP:
+ if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START)
+ continue;
+
+ if (!snd_soc_dpcm_can_be_free_stop(fe, be, stream))
+ continue;
+
+ ret = dpcm_do_trigger(dpcm, be_substream, cmd);
+ if (ret)
+ return ret;
+
+ be->dpcm[stream].state = SND_SOC_DPCM_STATE_STOP;
+ break;
+ case SNDRV_PCM_TRIGGER_SUSPEND:
+ if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_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_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_do_trigger(struct snd_pcm_substream *substream, int cmd)
+{
+ struct snd_soc_pcm_runtime *fe = substream->private_data;
+ int stream = substream->stream, ret;
+ enum snd_soc_dpcm_trigger trigger = fe->dai_link->trigger[stream];
+
+ fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_FE;
+
+ switch (trigger) {
+ case SND_SOC_DPCM_TRIGGER_PRE:
+ /* call trigger on the frontend before the backend. */
+
+ dev_dbg(fe->dev, "ASoC: pre trigger FE %s cmd %d\n",
+ fe->dai_link->name, cmd);
+
+ ret = soc_pcm_trigger(substream, cmd);
+ if (ret < 0) {
+ dev_err(fe->dev,"ASoC: trigger FE failed %d\n", ret);
+ goto out;
+ }
+
+ ret = dpcm_be_dai_trigger(fe, substream->stream, cmd);
+ break;
+ case SND_SOC_DPCM_TRIGGER_POST:
+ /* call trigger on the frontend after the backend. */
+
+ ret = dpcm_be_dai_trigger(fe, substream->stream, cmd);
+ if (ret < 0) {
+ dev_err(fe->dev,"ASoC: trigger FE failed %d\n", ret);
+ goto out;
+ }
+
+ dev_dbg(fe->dev, "ASoC: post trigger FE %s cmd %d\n",
+ fe->dai_link->name, cmd);
+
+ ret = soc_pcm_trigger(substream, cmd);
+ break;
+ case SND_SOC_DPCM_TRIGGER_BESPOKE:
+ /* bespoke trigger() - handles both FE and BEs */
+
+ dev_dbg(fe->dev, "ASoC: bespoke trigger FE %s cmd %d\n",
+ fe->dai_link->name, cmd);
+
+ ret = soc_pcm_bespoke_trigger(substream, cmd);
+ if (ret < 0) {
+ dev_err(fe->dev,"ASoC: trigger FE failed %d\n", ret);
+ goto out;
+ }
+ break;
+ default:
+ dev_err(fe->dev, "ASoC: invalid trigger cmd %d for %s\n", cmd,
+ fe->dai_link->name);
+ ret = -EINVAL;
+ goto out;
+ }
+
+ switch (cmd) {
+ case SNDRV_PCM_TRIGGER_START:
+ case SNDRV_PCM_TRIGGER_RESUME:
+ case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
+ fe->dpcm[stream].state = SND_SOC_DPCM_STATE_START;
+ break;
+ case SNDRV_PCM_TRIGGER_STOP:
+ case SNDRV_PCM_TRIGGER_SUSPEND:
+ fe->dpcm[stream].state = SND_SOC_DPCM_STATE_STOP;
+ break;
+ case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
+ fe->dpcm[stream].state = SND_SOC_DPCM_STATE_PAUSED;
+ break;
+ }
+
+out:
+ fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_NO;
+ return ret;
+}
+
+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;
+
+ /* if FE's runtime_update is already set, we're in race;
+ * process this trigger later at exit
+ */
+ if (fe->dpcm[stream].runtime_update != SND_SOC_DPCM_UPDATE_NO) {
+ fe->dpcm[stream].trigger_pending = cmd + 1;
+ return 0; /* delayed, assuming it's successful */
+ }
+
+ /* we're alone, let's trigger */
+ return dpcm_fe_dai_do_trigger(substream, cmd);
+}
+
+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) &&
+ (be->dpcm[stream].state != SND_SOC_DPCM_STATE_SUSPEND))
+ continue;
+
+ dev_dbg(be->dev, "ASoC: prepare BE %s\n",
+ be->dai_link->name);
+
+ ret = soc_pcm_prepare(be_substream);
+ if (ret < 0) {
+ dev_err(be->dev, "ASoC: backend prepare failed %d\n",
+ ret);
+ break;
+ }
+
+ be->dpcm[stream].state = SND_SOC_DPCM_STATE_PREPARE;
+ }
+ return ret;
+}
+
+static int dpcm_fe_dai_prepare(struct snd_pcm_substream *substream)
+{
+ struct snd_soc_pcm_runtime *fe = substream->private_data;
+ int stream = substream->stream, ret = 0;
+
+ mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
+
+ dev_dbg(fe->dev, "ASoC: prepare FE %s\n", fe->dai_link->name);
+
+ dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_FE);
+
+ /* there is no point preparing this FE if there are no BEs */
+ if (list_empty(&fe->dpcm[stream].be_clients)) {
+ dev_err(fe->dev, "ASoC: no backend DAIs enabled for %s\n",
+ fe->dai_link->name);
+ ret = -EINVAL;
+ goto out;
+ }
+
+ ret = dpcm_be_dai_prepare(fe, substream->stream);
+ if (ret < 0)
+ goto out;
+
+ /* call prepare on the frontend */
+ ret = soc_pcm_prepare(substream);
+ if (ret < 0) {
+ dev_err(fe->dev,"ASoC: prepare FE %s failed\n",
+ fe->dai_link->name);
+ goto out;
+ }
+
+ /* run the stream event for each BE */
+ dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_START);
+ fe->dpcm[stream].state = SND_SOC_DPCM_STATE_PREPARE;
+
+out:
+ dpcm_set_fe_update_state(fe, stream, 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_component *component;
+ struct snd_soc_rtdcom_list *rtdcom;
+
+ for_each_rtdcom(rtd, rtdcom) {
+ component = rtdcom->component;
+
+ if (!component->driver->ops ||
+ !component->driver->ops->ioctl)
+ continue;
+
+ /* FIXME: use 1st ioctl */
+ return component->driver->ops->ioctl(substream, cmd, arg);
+ }
+
+ return snd_pcm_lib_ioctl(substream, cmd, arg);
+}
+
+static int dpcm_run_update_shutdown(struct snd_soc_pcm_runtime *fe, int stream)
+{
+ struct snd_pcm_substream *substream =
+ snd_soc_dpcm_get_substream(fe, stream);
+ enum snd_soc_dpcm_trigger trigger = fe->dai_link->trigger[stream];
+ int err;
+
+ dev_dbg(fe->dev, "ASoC: runtime %s close on FE %s\n",
+ stream ? "capture" : "playback", fe->dai_link->name);
+
+ if (trigger == SND_SOC_DPCM_TRIGGER_BESPOKE) {
+ /* call bespoke trigger - FE takes care of all BE triggers */
+ dev_dbg(fe->dev, "ASoC: bespoke trigger FE %s cmd stop\n",
+ fe->dai_link->name);
+
+ err = soc_pcm_bespoke_trigger(substream, SNDRV_PCM_TRIGGER_STOP);
+ if (err < 0)
+ dev_err(fe->dev,"ASoC: trigger FE failed %d\n", err);
+ } else {
+ dev_dbg(fe->dev, "ASoC: trigger FE %s cmd stop\n",
+ fe->dai_link->name);
+
+ err = dpcm_be_dai_trigger(fe, stream, SNDRV_PCM_TRIGGER_STOP);
+ if (err < 0)
+ dev_err(fe->dev,"ASoC: trigger FE failed %d\n", err);
+ }
+
+ err = dpcm_be_dai_hw_free(fe, stream);
+ if (err < 0)
+ dev_err(fe->dev,"ASoC: hw_free FE failed %d\n", err);
+
+ err = dpcm_be_dai_shutdown(fe, stream);
+ if (err < 0)
+ dev_err(fe->dev,"ASoC: shutdown FE failed %d\n", err);
+
+ /* run the stream event for each BE */
+ dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_NOP);
+
+ return 0;
+}
+
+static int dpcm_run_update_startup(struct snd_soc_pcm_runtime *fe, int stream)
+{
+ struct snd_pcm_substream *substream =
+ snd_soc_dpcm_get_substream(fe, stream);
+ struct snd_soc_dpcm *dpcm;
+ enum snd_soc_dpcm_trigger trigger = fe->dai_link->trigger[stream];
+ int ret;
+
+ dev_dbg(fe->dev, "ASoC: runtime %s open on FE %s\n",
+ stream ? "capture" : "playback", fe->dai_link->name);
+
+ /* Only start the BE if the FE is ready */
+ if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_HW_FREE ||
+ fe->dpcm[stream].state == SND_SOC_DPCM_STATE_CLOSE)
+ return -EINVAL;
+
+ /* startup must always be called for new BEs */
+ ret = dpcm_be_dai_startup(fe, stream);
+ if (ret < 0)
+ goto disconnect;
+
+ /* keep going if FE state is > open */
+ if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_OPEN)
+ return 0;
+
+ ret = dpcm_be_dai_hw_params(fe, stream);
+ if (ret < 0)
+ goto close;
+
+ /* keep going if FE state is > hw_params */
+ if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_HW_PARAMS)
+ return 0;
+
+
+ ret = dpcm_be_dai_prepare(fe, stream);
+ if (ret < 0)
+ goto hw_free;
+
+ /* run the stream event for each BE */
+ dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_NOP);
+
+ /* keep going if FE state is > prepare */
+ if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_PREPARE ||
+ fe->dpcm[stream].state == SND_SOC_DPCM_STATE_STOP)
+ return 0;
+
+ if (trigger == SND_SOC_DPCM_TRIGGER_BESPOKE) {
+ /* call trigger on the frontend - FE takes care of all BE triggers */
+ dev_dbg(fe->dev, "ASoC: bespoke trigger FE %s cmd start\n",
+ fe->dai_link->name);
+
+ ret = soc_pcm_bespoke_trigger(substream, SNDRV_PCM_TRIGGER_START);
+ if (ret < 0) {
+ dev_err(fe->dev,"ASoC: bespoke trigger FE failed %d\n", ret);
+ goto hw_free;
+ }
+ } else {
+ dev_dbg(fe->dev, "ASoC: trigger FE %s cmd start\n",
+ fe->dai_link->name);
+
+ ret = dpcm_be_dai_trigger(fe, stream,
+ SNDRV_PCM_TRIGGER_START);
+ if (ret < 0) {
+ dev_err(fe->dev,"ASoC: trigger FE failed %d\n", ret);
+ goto hw_free;
+ }
+ }
+
+ return 0;
+
+hw_free:
+ dpcm_be_dai_hw_free(fe, stream);
+close:
+ dpcm_be_dai_shutdown(fe, stream);
+disconnect:
+ /* disconnect any non started BEs */
+ list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) {
+ struct snd_soc_pcm_runtime *be = dpcm->be;
+ if (be->dpcm[stream].state != SND_SOC_DPCM_STATE_START)
+ dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE;
+ }
+
+ return ret;
+}
+
+static int dpcm_run_new_update(struct snd_soc_pcm_runtime *fe, int stream)
+{
+ int ret;
+
+ dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_BE);
+ ret = dpcm_run_update_startup(fe, stream);
+ if (ret < 0)
+ dev_err(fe->dev, "ASoC: failed to startup some BEs\n");
+ dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
+
+ return ret;
+}
+
+static int dpcm_run_old_update(struct snd_soc_pcm_runtime *fe, int stream)
+{
+ int ret;
+
+ dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_BE);
+ ret = dpcm_run_update_shutdown(fe, stream);
+ if (ret < 0)
+ dev_err(fe->dev, "ASoC: failed to shutdown some BEs\n");
+ dpcm_set_fe_update_state(fe, stream, SND_SOC_DPCM_UPDATE_NO);
+
+ return ret;
+}
+
+static int soc_dpcm_fe_runtime_update(struct snd_soc_pcm_runtime *fe, int new)
+{
+ struct snd_soc_dapm_widget_list *list;
+ int count, paths;
+
+ if (!fe->dai_link->dynamic)
+ return 0;
+
+ /* only check active links */
+ if (!fe->cpu_dai->active)
+ return 0;
+
+ /* DAPM sync will call this to update DSP paths */
+ dev_dbg(fe->dev, "ASoC: DPCM %s runtime update for FE %s\n",
+ new ? "new" : "old", fe->dai_link->name);
+
+ /* skip if FE doesn't have playback capability */
+ if (!fe->cpu_dai->driver->playback.channels_min ||
+ !fe->codec_dai->driver->playback.channels_min)
+ goto capture;
+
+ /* skip if FE isn't currently playing */
+ if (!fe->cpu_dai->playback_active || !fe->codec_dai->playback_active)
+ goto capture;
+
+ paths = dpcm_path_get(fe, SNDRV_PCM_STREAM_PLAYBACK, &list);
+ if (paths < 0) {
+ dev_warn(fe->dev, "ASoC: %s no valid %s path\n",
+ fe->dai_link->name, "playback");
+ return paths;
+ }
+
+ /* update any playback paths */
+ count = dpcm_process_paths(fe, SNDRV_PCM_STREAM_PLAYBACK, &list, new);
+ if (count) {
+ if (new)
+ dpcm_run_new_update(fe, SNDRV_PCM_STREAM_PLAYBACK);
+ else
+ 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);
+ }
+
+ dpcm_path_put(&list);
+
+capture:
+ /* skip if FE doesn't have capture capability */
+ if (!fe->cpu_dai->driver->capture.channels_min ||
+ !fe->codec_dai->driver->capture.channels_min)
+ return 0;
+
+ /* skip if FE isn't currently capturing */
+ if (!fe->cpu_dai->capture_active || !fe->codec_dai->capture_active)
+ return 0;
+
+ paths = dpcm_path_get(fe, SNDRV_PCM_STREAM_CAPTURE, &list);
+ if (paths < 0) {
+ dev_warn(fe->dev, "ASoC: %s no valid %s path\n",
+ fe->dai_link->name, "capture");
+ return paths;
+ }
+
+ /* update any old capture paths */
+ count = dpcm_process_paths(fe, SNDRV_PCM_STREAM_CAPTURE, &list, new);
+ if (count) {
+ if (new)
+ dpcm_run_new_update(fe, SNDRV_PCM_STREAM_CAPTURE);
+ else
+ 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);
+
+ return 0;
+}
+
+/* Called by DAPM mixer/mux changes to update audio routing between PCMs and
+ * any DAI links.
+ */
+int soc_dpcm_runtime_update(struct snd_soc_card *card)
+{
+ struct snd_soc_pcm_runtime *fe;
+ int ret = 0;
+
+ mutex_lock_nested(&card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
+ /* shutdown all old paths first */
+ list_for_each_entry(fe, &card->rtd_list, list) {
+ ret = soc_dpcm_fe_runtime_update(fe, 0);
+ if (ret)
+ goto out;
+ }
+
+ /* bring new paths up */
+ list_for_each_entry(fe, &card->rtd_list, list) {
+ ret = soc_dpcm_fe_runtime_update(fe, 1);
+ if (ret)
+ goto out;
+ }
+
+out:
+ mutex_unlock(&card->mutex);
+ return ret;
+}
+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;
+ int i;
+
+ if (be->dai_link->ignore_suspend)
+ continue;
+
+ for (i = 0; i < be->num_codecs; i++) {
+ struct snd_soc_dai *dai = be->codec_dais[i];
+ struct snd_soc_dai_driver *drv = dai->driver;
+
+ dev_dbg(be->dev, "ASoC: BE digital mute %s\n",
+ be->dai_link->name);
+
+ if (drv->ops && drv->ops->digital_mute &&
+ dai->playback_active)
+ drv->ops->digital_mute(dai, mute);
+ }
+ }
+
+ return 0;
+}
+
+static int dpcm_fe_dai_open(struct snd_pcm_substream *fe_substream)
+{
+ struct snd_soc_pcm_runtime *fe = fe_substream->private_data;
+ struct snd_soc_dpcm *dpcm;
+ struct snd_soc_dapm_widget_list *list;
+ int ret;
+ int stream = fe_substream->stream;
+
+ mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
+ fe->dpcm[stream].runtime = fe_substream->runtime;
+
+ ret = dpcm_path_get(fe, stream, &list);
+ if (ret < 0) {
+ mutex_unlock(&fe->card->mutex);
+ return ret;
+ } 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);
+
+ 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;
+}
+
+static void soc_pcm_private_free(struct snd_pcm *pcm)
+{
+ struct snd_soc_pcm_runtime *rtd = pcm->private_data;
+ struct snd_soc_rtdcom_list *rtdcom;
+ struct snd_soc_component *component;
+
+ /* need to sync the delayed work before releasing resources */
+ flush_delayed_work(&rtd->delayed_work);
+ for_each_rtdcom(rtd, rtdcom) {
+ component = rtdcom->component;
+
+ if (component->driver->pcm_free)
+ component->driver->pcm_free(pcm);
+ }
+}
+
+static int soc_rtdcom_ack(struct snd_pcm_substream *substream)
+{
+ struct snd_soc_pcm_runtime *rtd = substream->private_data;
+ struct snd_soc_rtdcom_list *rtdcom;
+ struct snd_soc_component *component;
+
+ for_each_rtdcom(rtd, rtdcom) {
+ component = rtdcom->component;
+
+ if (!component->driver->ops ||
+ !component->driver->ops->ack)
+ continue;
+
+ /* FIXME. it returns 1st ask now */
+ return component->driver->ops->ack(substream);
+ }
+
+ return -EINVAL;
+}
+
+static int soc_rtdcom_copy_user(struct snd_pcm_substream *substream, int channel,
+ unsigned long pos, void __user *buf,
+ unsigned long bytes)
+{
+ struct snd_soc_pcm_runtime *rtd = substream->private_data;
+ struct snd_soc_rtdcom_list *rtdcom;
+ struct snd_soc_component *component;
+
+ for_each_rtdcom(rtd, rtdcom) {
+ component = rtdcom->component;
+
+ if (!component->driver->ops ||
+ !component->driver->ops->copy_user)
+ continue;
+
+ /* FIXME. it returns 1st copy now */
+ return component->driver->ops->copy_user(substream, channel,
+ pos, buf, bytes);
+ }
+
+ return -EINVAL;
+}
+
+static int soc_rtdcom_copy_kernel(struct snd_pcm_substream *substream, int channel,
+ unsigned long pos, void *buf, unsigned long bytes)
+{
+ struct snd_soc_pcm_runtime *rtd = substream->private_data;
+ struct snd_soc_rtdcom_list *rtdcom;
+ struct snd_soc_component *component;
+
+ for_each_rtdcom(rtd, rtdcom) {
+ component = rtdcom->component;
+
+ if (!component->driver->ops ||
+ !component->driver->ops->copy_kernel)
+ continue;
+
+ /* FIXME. it returns 1st copy now */
+ return component->driver->ops->copy_kernel(substream, channel,
+ pos, buf, bytes);
+ }
+
+ return -EINVAL;
+}
+
+static int soc_rtdcom_fill_silence(struct snd_pcm_substream *substream, int channel,
+ unsigned long pos, unsigned long bytes)
+{
+ struct snd_soc_pcm_runtime *rtd = substream->private_data;
+ struct snd_soc_rtdcom_list *rtdcom;
+ struct snd_soc_component *component;
+
+ for_each_rtdcom(rtd, rtdcom) {
+ component = rtdcom->component;
+
+ if (!component->driver->ops ||
+ !component->driver->ops->fill_silence)
+ continue;
+
+ /* FIXME. it returns 1st silence now */
+ return component->driver->ops->fill_silence(substream, channel,
+ pos, bytes);
+ }
+
+ return -EINVAL;
+}
+
+static struct page *soc_rtdcom_page(struct snd_pcm_substream *substream,
+ unsigned long offset)
+{
+ struct snd_soc_pcm_runtime *rtd = substream->private_data;
+ struct snd_soc_rtdcom_list *rtdcom;
+ struct snd_soc_component *component;
+ struct page *page;
+
+ for_each_rtdcom(rtd, rtdcom) {
+ component = rtdcom->component;
+
+ if (!component->driver->ops ||
+ !component->driver->ops->page)
+ continue;
+
+ /* FIXME. it returns 1st page now */
+ page = component->driver->ops->page(substream, offset);
+ if (page)
+ return page;
+ }
+
+ return NULL;
+}
+
+static int soc_rtdcom_mmap(struct snd_pcm_substream *substream,
+ struct vm_area_struct *vma)
+{
+ struct snd_soc_pcm_runtime *rtd = substream->private_data;
+ struct snd_soc_rtdcom_list *rtdcom;
+ struct snd_soc_component *component;
+
+ for_each_rtdcom(rtd, rtdcom) {
+ component = rtdcom->component;
+
+ if (!component->driver->ops ||
+ !component->driver->ops->mmap)
+ continue;
+
+ /* FIXME. it returns 1st mmap now */
+ return component->driver->ops->mmap(substream, vma);
+ }
+
+ return -EINVAL;
+}
+
+/* create a new pcm */
+int soc_new_pcm(struct snd_soc_pcm_runtime *rtd, int num)
+{
+ struct snd_soc_dai *codec_dai;
+ struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
+ struct snd_soc_component *component;
+ struct snd_soc_rtdcom_list *rtdcom;
+ struct snd_pcm *pcm;
+ char new_name[64];
+ int ret = 0, playback = 0, capture = 0;
+ int i;
+
+ if (rtd->dai_link->dynamic || rtd->dai_link->no_pcm) {
+ playback = rtd->dai_link->dpcm_playback;
+ capture = rtd->dai_link->dpcm_capture;
+ } else {
+ for (i = 0; i < rtd->num_codecs; i++) {
+ codec_dai = rtd->codec_dais[i];
+ if (codec_dai->driver->playback.channels_min)
+ playback = 1;
+ if (codec_dai->driver->capture.channels_min)
+ capture = 1;
+ }
+
+ capture = capture && cpu_dai->driver->capture.channels_min;
+ playback = playback && cpu_dai->driver->playback.channels_min;
+ }
+
+ if (rtd->dai_link->playback_only) {
+ playback = 1;
+ capture = 0;
+ }
+
+ if (rtd->dai_link->capture_only) {
+ playback = 0;
+ capture = 1;
+ }
+
+ /* create the PCM */
+ if (rtd->dai_link->no_pcm) {
+ snprintf(new_name, sizeof(new_name), "(%s)",
+ rtd->dai_link->stream_name);
+
+ ret = snd_pcm_new_internal(rtd->card->snd_card, new_name, num,
+ playback, capture, &pcm);
+ } else {
+ if (rtd->dai_link->dynamic)
+ snprintf(new_name, sizeof(new_name), "%s (*)",
+ rtd->dai_link->stream_name);
+ else
+ snprintf(new_name, sizeof(new_name), "%s %s-%d",
+ rtd->dai_link->stream_name,
+ (rtd->num_codecs > 1) ?
+ "multicodec" : rtd->codec_dai->name, num);
+
+ ret = snd_pcm_new(rtd->card->snd_card, new_name, num, playback,
+ capture, &pcm);
+ }
+ if (ret < 0) {
+ dev_err(rtd->card->dev, "ASoC: can't create pcm for %s\n",
+ rtd->dai_link->name);
+ return ret;
+ }
+ dev_dbg(rtd->card->dev, "ASoC: registered pcm #%d %s\n",num, new_name);
+
+ /* DAPM dai link stream work */
+ INIT_DELAYED_WORK(&rtd->delayed_work, close_delayed_work);
+
+ pcm->nonatomic = rtd->dai_link->nonatomic;
+ 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;
+ }
+
+ for_each_rtdcom(rtd, rtdcom) {
+ const struct snd_pcm_ops *ops = rtdcom->component->driver->ops;
+
+ if (!ops)
+ continue;
+
+ if (ops->ack)
+ rtd->ops.ack = soc_rtdcom_ack;
+ if (ops->copy_user)
+ rtd->ops.copy_user = soc_rtdcom_copy_user;
+ if (ops->copy_kernel)
+ rtd->ops.copy_kernel = soc_rtdcom_copy_kernel;
+ if (ops->fill_silence)
+ rtd->ops.fill_silence = soc_rtdcom_fill_silence;
+ if (ops->page)
+ rtd->ops.page = soc_rtdcom_page;
+ if (ops->mmap)
+ rtd->ops.mmap = soc_rtdcom_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);
+
+ for_each_rtdcom(rtd, rtdcom) {
+ component = rtdcom->component;
+
+ if (!component->driver->pcm_new)
+ continue;
+
+ ret = component->driver->pcm_new(rtd);
+ if (ret < 0) {
+ dev_err(component->dev,
+ "ASoC: pcm constructor failed: %d\n",
+ ret);
+ return ret;
+ }
+ }
+
+ pcm->private_free = soc_pcm_private_free;
+out:
+ dev_info(rtd->card->dev, "%s <-> %s mapping ok\n",
+ (rtd->num_codecs > 1) ? "multicodec" : rtd->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);
+
+#ifdef CONFIG_DEBUG_FS
+static const 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,
+};
+
+void soc_dpcm_debugfs_add(struct snd_soc_pcm_runtime *rtd)
+{
+ if (!rtd->dai_link)
+ return;
+
+ if (!rtd->card->debugfs_card_root)
+ return;
+
+ 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;
+ }
+
+ debugfs_create_file("state", 0444, rtd->debugfs_dpcm_root,
+ rtd, &dpcm_state_fops);
+}
+#endif