Adding upstream version 4.19.249.upstream/4.19.249

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 993 insertions, 0 deletions

diff --git a/sound/soc/soc-compress.c b/sound/soc/soc-compress.c
new file mode 100644
index 000000000..409d082e8
--- /dev/null
+++ b/sound/soc/soc-compress.c
@@ -0,0 +1,993 @@
+// SPDX-License-Identifier: GPL-2.0+
+//
+// soc-compress.c  --  ALSA SoC Compress
+//
+// Copyright (C) 2012 Intel Corp.
+//
+// Authors: Namarta Kohli <namartax.kohli@intel.com>
+//          Ramesh Babu K V <ramesh.babu@linux.intel.com>
+//          Vinod Koul <vinod.koul@linux.intel.com>
+
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/delay.h>
+#include <linux/slab.h>
+#include <linux/workqueue.h>
+#include <sound/core.h>
+#include <sound/compress_params.h>
+#include <sound/compress_driver.h>
+#include <sound/soc.h>
+#include <sound/initval.h>
+#include <sound/soc-dpcm.h>
+
+static int soc_compr_components_open(struct snd_compr_stream *cstream,
+				     struct snd_soc_component **last)
+{
+	struct snd_soc_pcm_runtime *rtd = cstream->private_data;
+	struct snd_soc_component *component;
+	struct snd_soc_rtdcom_list *rtdcom;
+	int ret;
+
+	for_each_rtdcom(rtd, rtdcom) {
+		component = rtdcom->component;
+
+		if (!component->driver->compr_ops ||
+		    !component->driver->compr_ops->open)
+			continue;
+
+		ret = component->driver->compr_ops->open(cstream);
+		if (ret < 0) {
+			dev_err(component->dev,
+				"Compress ASoC: can't open platform %s: %d\n",
+				component->name, ret);
+
+			*last = component;
+			return ret;
+		}
+	}
+
+	*last = NULL;
+	return 0;
+}
+
+static int soc_compr_components_free(struct snd_compr_stream *cstream,
+				     struct snd_soc_component *last)
+{
+	struct snd_soc_pcm_runtime *rtd = cstream->private_data;
+	struct snd_soc_component *component;
+	struct snd_soc_rtdcom_list *rtdcom;
+
+	for_each_rtdcom(rtd, rtdcom) {
+		component = rtdcom->component;
+
+		if (component == last)
+			break;
+
+		if (!component->driver->compr_ops ||
+		    !component->driver->compr_ops->free)
+			continue;
+
+		component->driver->compr_ops->free(cstream);
+	}
+
+	return 0;
+}
+
+static int soc_compr_open(struct snd_compr_stream *cstream)
+{
+	struct snd_soc_pcm_runtime *rtd = cstream->private_data;
+	struct snd_soc_component *component;
+	struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
+	int ret;
+
+	mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
+
+	if (cpu_dai->driver->cops && cpu_dai->driver->cops->startup) {
+		ret = cpu_dai->driver->cops->startup(cstream, cpu_dai);
+		if (ret < 0) {
+			dev_err(cpu_dai->dev,
+				"Compress ASoC: can't open interface %s: %d\n",
+				cpu_dai->name, ret);
+			goto out;
+		}
+	}
+
+	ret = soc_compr_components_open(cstream, &component);
+	if (ret < 0)
+		goto machine_err;
+
+	if (rtd->dai_link->compr_ops && rtd->dai_link->compr_ops->startup) {
+		ret = rtd->dai_link->compr_ops->startup(cstream);
+		if (ret < 0) {
+			dev_err(rtd->dev,
+				"Compress ASoC: %s startup failed: %d\n",
+				rtd->dai_link->name, ret);
+			goto machine_err;
+		}
+	}
+
+	snd_soc_runtime_activate(rtd, cstream->direction);
+
+	mutex_unlock(&rtd->pcm_mutex);
+
+	return 0;
+
+machine_err:
+	soc_compr_components_free(cstream, component);
+
+	if (cpu_dai->driver->cops && cpu_dai->driver->cops->shutdown)
+		cpu_dai->driver->cops->shutdown(cstream, cpu_dai);
+out:
+	mutex_unlock(&rtd->pcm_mutex);
+	return ret;
+}
+
+static int soc_compr_open_fe(struct snd_compr_stream *cstream)
+{
+	struct snd_soc_pcm_runtime *fe = cstream->private_data;
+	struct snd_pcm_substream *fe_substream =
+		 fe->pcm->streams[cstream->direction].substream;
+	struct snd_soc_component *component;
+	struct snd_soc_dai *cpu_dai = fe->cpu_dai;
+	struct snd_soc_dpcm *dpcm;
+	struct snd_soc_dapm_widget_list *list;
+	int stream;
+	int ret;
+
+	if (cstream->direction == SND_COMPRESS_PLAYBACK)
+		stream = SNDRV_PCM_STREAM_PLAYBACK;
+	else
+		stream = SNDRV_PCM_STREAM_CAPTURE;
+
+	mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
+	fe->dpcm[stream].runtime = fe_substream->runtime;
+
+	ret = dpcm_path_get(fe, stream, &list);
+	if (ret < 0)
+		goto be_err;
+	else if (ret == 0)
+		dev_dbg(fe->dev, "Compress ASoC: %s no valid %s route\n",
+			fe->dai_link->name, stream ? "capture" : "playback");
+	/* calculate valid and active FE <-> BE dpcms */
+	dpcm_process_paths(fe, stream, &list, 1);
+	fe->dpcm[stream].runtime = fe_substream->runtime;
+
+	fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_FE;
+
+	ret = dpcm_be_dai_startup(fe, stream);
+	if (ret < 0) {
+		/* clean up all links */
+		list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be)
+			dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE;
+
+		dpcm_be_disconnect(fe, stream);
+		fe->dpcm[stream].runtime = NULL;
+		goto out;
+	}
+
+	if (cpu_dai->driver->cops && cpu_dai->driver->cops->startup) {
+		ret = cpu_dai->driver->cops->startup(cstream, cpu_dai);
+		if (ret < 0) {
+			dev_err(cpu_dai->dev,
+				"Compress ASoC: can't open interface %s: %d\n",
+				cpu_dai->name, ret);
+			goto out;
+		}
+	}
+
+	ret = soc_compr_components_open(cstream, &component);
+	if (ret < 0)
+		goto open_err;
+
+	if (fe->dai_link->compr_ops && fe->dai_link->compr_ops->startup) {
+		ret = fe->dai_link->compr_ops->startup(cstream);
+		if (ret < 0) {
+			pr_err("Compress ASoC: %s startup failed: %d\n",
+			       fe->dai_link->name, ret);
+			goto machine_err;
+		}
+	}
+
+	dpcm_clear_pending_state(fe, stream);
+	dpcm_path_put(&list);
+
+	fe->dpcm[stream].state = SND_SOC_DPCM_STATE_OPEN;
+	fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_NO;
+
+	snd_soc_runtime_activate(fe, stream);
+
+	mutex_unlock(&fe->card->mutex);
+
+	return 0;
+
+machine_err:
+	soc_compr_components_free(cstream, component);
+open_err:
+	if (cpu_dai->driver->cops && cpu_dai->driver->cops->shutdown)
+		cpu_dai->driver->cops->shutdown(cstream, cpu_dai);
+out:
+	dpcm_path_put(&list);
+be_err:
+	fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_NO;
+	mutex_unlock(&fe->card->mutex);
+	return ret;
+}
+
+/*
+ * Power down the audio subsystem pmdown_time msecs after close is called.
+ * This is to ensure there are no pops or clicks in between any music tracks
+ * due to DAPM power cycling.
+ */
+static void close_delayed_work(struct work_struct *work)
+{
+	struct snd_soc_pcm_runtime *rtd =
+			container_of(work, struct snd_soc_pcm_runtime, delayed_work.work);
+	struct snd_soc_dai *codec_dai = rtd->codec_dai;
+
+	mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
+
+	dev_dbg(rtd->dev,
+		"Compress ASoC: pop wq checking: %s status: %s waiting: %s\n",
+		codec_dai->driver->playback.stream_name,
+		codec_dai->playback_active ? "active" : "inactive",
+		rtd->pop_wait ? "yes" : "no");
+
+	/* are we waiting on this codec DAI stream */
+	if (rtd->pop_wait == 1) {
+		rtd->pop_wait = 0;
+		snd_soc_dapm_stream_event(rtd, SNDRV_PCM_STREAM_PLAYBACK,
+					  SND_SOC_DAPM_STREAM_STOP);
+	}
+
+	mutex_unlock(&rtd->pcm_mutex);
+}
+
+static int soc_compr_free(struct snd_compr_stream *cstream)
+{
+	struct snd_soc_pcm_runtime *rtd = cstream->private_data;
+	struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
+	struct snd_soc_dai *codec_dai = rtd->codec_dai;
+	int stream;
+
+	mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
+
+	if (cstream->direction == SND_COMPRESS_PLAYBACK)
+		stream = SNDRV_PCM_STREAM_PLAYBACK;
+	else
+		stream = SNDRV_PCM_STREAM_CAPTURE;
+
+	snd_soc_runtime_deactivate(rtd, stream);
+
+	snd_soc_dai_digital_mute(codec_dai, 1, cstream->direction);
+
+	if (!cpu_dai->active)
+		cpu_dai->rate = 0;
+
+	if (!codec_dai->active)
+		codec_dai->rate = 0;
+
+	if (rtd->dai_link->compr_ops && rtd->dai_link->compr_ops->shutdown)
+		rtd->dai_link->compr_ops->shutdown(cstream);
+
+	soc_compr_components_free(cstream, NULL);
+
+	if (cpu_dai->driver->cops && cpu_dai->driver->cops->shutdown)
+		cpu_dai->driver->cops->shutdown(cstream, cpu_dai);
+
+	if (cstream->direction == SND_COMPRESS_PLAYBACK) {
+		if (snd_soc_runtime_ignore_pmdown_time(rtd)) {
+			snd_soc_dapm_stream_event(rtd,
+						  SNDRV_PCM_STREAM_PLAYBACK,
+						  SND_SOC_DAPM_STREAM_STOP);
+		} else {
+			rtd->pop_wait = 1;
+			queue_delayed_work(system_power_efficient_wq,
+					   &rtd->delayed_work,
+					   msecs_to_jiffies(rtd->pmdown_time));
+		}
+	} else {
+		/* capture streams can be powered down now */
+		snd_soc_dapm_stream_event(rtd,
+					  SNDRV_PCM_STREAM_CAPTURE,
+					  SND_SOC_DAPM_STREAM_STOP);
+	}
+
+	mutex_unlock(&rtd->pcm_mutex);
+	return 0;
+}
+
+static int soc_compr_free_fe(struct snd_compr_stream *cstream)
+{
+	struct snd_soc_pcm_runtime *fe = cstream->private_data;
+	struct snd_soc_dai *cpu_dai = fe->cpu_dai;
+	struct snd_soc_dpcm *dpcm;
+	int stream, ret;
+
+	mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
+
+	if (cstream->direction == SND_COMPRESS_PLAYBACK)
+		stream = SNDRV_PCM_STREAM_PLAYBACK;
+	else
+		stream = SNDRV_PCM_STREAM_CAPTURE;
+
+	snd_soc_runtime_deactivate(fe, stream);
+
+	fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_FE;
+
+	ret = dpcm_be_dai_hw_free(fe, stream);
+	if (ret < 0)
+		dev_err(fe->dev, "Compressed ASoC: hw_free failed: %d\n", ret);
+
+	ret = dpcm_be_dai_shutdown(fe, stream);
+
+	/* mark FE's links ready to prune */
+	list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be)
+		dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE;
+
+	dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_STOP);
+
+	fe->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE;
+	fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_NO;
+
+	dpcm_be_disconnect(fe, stream);
+
+	fe->dpcm[stream].runtime = NULL;
+
+	if (fe->dai_link->compr_ops && fe->dai_link->compr_ops->shutdown)
+		fe->dai_link->compr_ops->shutdown(cstream);
+
+	soc_compr_components_free(cstream, NULL);
+
+	if (cpu_dai->driver->cops && cpu_dai->driver->cops->shutdown)
+		cpu_dai->driver->cops->shutdown(cstream, cpu_dai);
+
+	mutex_unlock(&fe->card->mutex);
+	return 0;
+}
+
+static int soc_compr_trigger(struct snd_compr_stream *cstream, int cmd)
+{
+
+	struct snd_soc_pcm_runtime *rtd = cstream->private_data;
+	struct snd_soc_component *component;
+	struct snd_soc_rtdcom_list *rtdcom;
+	struct snd_soc_dai *codec_dai = rtd->codec_dai;
+	struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
+	int ret = 0, __ret;
+
+	mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
+
+	for_each_rtdcom(rtd, rtdcom) {
+		component = rtdcom->component;
+
+		if (!component->driver->compr_ops ||
+		    !component->driver->compr_ops->trigger)
+			continue;
+
+		__ret = component->driver->compr_ops->trigger(cstream, cmd);
+		if (__ret < 0)
+			ret = __ret;
+	}
+	if (ret < 0)
+		goto out;
+
+	if (cpu_dai->driver->cops && cpu_dai->driver->cops->trigger)
+		cpu_dai->driver->cops->trigger(cstream, cmd, cpu_dai);
+
+	switch (cmd) {
+	case SNDRV_PCM_TRIGGER_START:
+		snd_soc_dai_digital_mute(codec_dai, 0, cstream->direction);
+		break;
+	case SNDRV_PCM_TRIGGER_STOP:
+		snd_soc_dai_digital_mute(codec_dai, 1, cstream->direction);
+		break;
+	}
+
+out:
+	mutex_unlock(&rtd->pcm_mutex);
+	return ret;
+}
+
+static int soc_compr_trigger_fe(struct snd_compr_stream *cstream, int cmd)
+{
+	struct snd_soc_pcm_runtime *fe = cstream->private_data;
+	struct snd_soc_component *component;
+	struct snd_soc_rtdcom_list *rtdcom;
+	struct snd_soc_dai *cpu_dai = fe->cpu_dai;
+	int ret = 0, __ret, stream;
+
+	if (cmd == SND_COMPR_TRIGGER_PARTIAL_DRAIN ||
+		cmd == SND_COMPR_TRIGGER_DRAIN) {
+
+		for_each_rtdcom(fe, rtdcom) {
+			component = rtdcom->component;
+
+			if (!component->driver->compr_ops ||
+			    !component->driver->compr_ops->trigger)
+				continue;
+
+			__ret = component->driver->compr_ops->trigger(cstream, cmd);
+			if (__ret < 0)
+				ret = __ret;
+		}
+		return ret;
+	}
+
+	if (cstream->direction == SND_COMPRESS_PLAYBACK)
+		stream = SNDRV_PCM_STREAM_PLAYBACK;
+	else
+		stream = SNDRV_PCM_STREAM_CAPTURE;
+
+	mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
+
+	if (cpu_dai->driver->cops && cpu_dai->driver->cops->trigger) {
+		ret = cpu_dai->driver->cops->trigger(cstream, cmd, cpu_dai);
+		if (ret < 0)
+			goto out;
+	}
+
+	for_each_rtdcom(fe, rtdcom) {
+		component = rtdcom->component;
+
+		if (!component->driver->compr_ops ||
+		    !component->driver->compr_ops->trigger)
+			continue;
+
+		__ret = component->driver->compr_ops->trigger(cstream, cmd);
+		if (__ret < 0)
+			ret = __ret;
+	}
+	if (ret < 0)
+		goto out;
+
+	fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_FE;
+
+	ret = dpcm_be_dai_trigger(fe, stream, cmd);
+
+	switch (cmd) {
+	case SNDRV_PCM_TRIGGER_START:
+	case SNDRV_PCM_TRIGGER_RESUME:
+	case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
+		fe->dpcm[stream].state = SND_SOC_DPCM_STATE_START;
+		break;
+	case SNDRV_PCM_TRIGGER_STOP:
+	case SNDRV_PCM_TRIGGER_SUSPEND:
+		fe->dpcm[stream].state = SND_SOC_DPCM_STATE_STOP;
+		break;
+	case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
+		fe->dpcm[stream].state = SND_SOC_DPCM_STATE_PAUSED;
+		break;
+	}
+
+out:
+	fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_NO;
+	mutex_unlock(&fe->card->mutex);
+	return ret;
+}
+
+static int soc_compr_set_params(struct snd_compr_stream *cstream,
+					struct snd_compr_params *params)
+{
+	struct snd_soc_pcm_runtime *rtd = cstream->private_data;
+	struct snd_soc_component *component;
+	struct snd_soc_rtdcom_list *rtdcom;
+	struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
+	int ret = 0, __ret;
+
+	mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
+
+	/*
+	 * First we call set_params for the CPU DAI, then the component
+	 * driver this should configure the SoC side. If the machine has
+	 * compressed ops then we call that as well. The expectation is
+	 * that these callbacks will configure everything for this compress
+	 * path, like configuring a PCM port for a CODEC.
+	 */
+	if (cpu_dai->driver->cops && cpu_dai->driver->cops->set_params) {
+		ret = cpu_dai->driver->cops->set_params(cstream, params, cpu_dai);
+		if (ret < 0)
+			goto err;
+	}
+
+	for_each_rtdcom(rtd, rtdcom) {
+		component = rtdcom->component;
+
+		if (!component->driver->compr_ops ||
+		    !component->driver->compr_ops->set_params)
+			continue;
+
+		__ret = component->driver->compr_ops->set_params(cstream, params);
+		if (__ret < 0)
+			ret = __ret;
+	}
+	if (ret < 0)
+		goto err;
+
+	if (rtd->dai_link->compr_ops && rtd->dai_link->compr_ops->set_params) {
+		ret = rtd->dai_link->compr_ops->set_params(cstream);
+		if (ret < 0)
+			goto err;
+	}
+
+	if (cstream->direction == SND_COMPRESS_PLAYBACK)
+		snd_soc_dapm_stream_event(rtd, SNDRV_PCM_STREAM_PLAYBACK,
+					  SND_SOC_DAPM_STREAM_START);
+	else
+		snd_soc_dapm_stream_event(rtd, SNDRV_PCM_STREAM_CAPTURE,
+					  SND_SOC_DAPM_STREAM_START);
+
+	/* cancel any delayed stream shutdown that is pending */
+	rtd->pop_wait = 0;
+	mutex_unlock(&rtd->pcm_mutex);
+
+	cancel_delayed_work_sync(&rtd->delayed_work);
+
+	return ret;
+
+err:
+	mutex_unlock(&rtd->pcm_mutex);
+	return ret;
+}
+
+static int soc_compr_set_params_fe(struct snd_compr_stream *cstream,
+				   struct snd_compr_params *params)
+{
+	struct snd_soc_pcm_runtime *fe = cstream->private_data;
+	struct snd_pcm_substream *fe_substream =
+		 fe->pcm->streams[cstream->direction].substream;
+	struct snd_soc_component *component;
+	struct snd_soc_rtdcom_list *rtdcom;
+	struct snd_soc_dai *cpu_dai = fe->cpu_dai;
+	int ret = 0, __ret, stream;
+
+	if (cstream->direction == SND_COMPRESS_PLAYBACK)
+		stream = SNDRV_PCM_STREAM_PLAYBACK;
+	else
+		stream = SNDRV_PCM_STREAM_CAPTURE;
+
+	mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
+
+	/*
+	 * Create an empty hw_params for the BE as the machine driver must
+	 * fix this up to match DSP decoder and ASRC configuration.
+	 * I.e. machine driver fixup for compressed BE is mandatory.
+	 */
+	memset(&fe->dpcm[fe_substream->stream].hw_params, 0,
+		sizeof(struct snd_pcm_hw_params));
+
+	fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_FE;
+
+	ret = dpcm_be_dai_hw_params(fe, stream);
+	if (ret < 0)
+		goto out;
+
+	ret = dpcm_be_dai_prepare(fe, stream);
+	if (ret < 0)
+		goto out;
+
+	if (cpu_dai->driver->cops && cpu_dai->driver->cops->set_params) {
+		ret = cpu_dai->driver->cops->set_params(cstream, params, cpu_dai);
+		if (ret < 0)
+			goto out;
+	}
+
+	for_each_rtdcom(fe, rtdcom) {
+		component = rtdcom->component;
+
+		if (!component->driver->compr_ops ||
+		    !component->driver->compr_ops->set_params)
+			continue;
+
+		__ret = component->driver->compr_ops->set_params(cstream, params);
+		if (__ret < 0)
+			ret = __ret;
+	}
+	if (ret < 0)
+		goto out;
+
+	if (fe->dai_link->compr_ops && fe->dai_link->compr_ops->set_params) {
+		ret = fe->dai_link->compr_ops->set_params(cstream);
+		if (ret < 0)
+			goto out;
+	}
+
+	dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_START);
+	fe->dpcm[stream].state = SND_SOC_DPCM_STATE_PREPARE;
+
+out:
+	fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_NO;
+	mutex_unlock(&fe->card->mutex);
+	return ret;
+}
+
+static int soc_compr_get_params(struct snd_compr_stream *cstream,
+				struct snd_codec *params)
+{
+	struct snd_soc_pcm_runtime *rtd = cstream->private_data;
+	struct snd_soc_component *component;
+	struct snd_soc_rtdcom_list *rtdcom;
+	struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
+	int ret = 0, __ret;
+
+	mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
+
+	if (cpu_dai->driver->cops && cpu_dai->driver->cops->get_params) {
+		ret = cpu_dai->driver->cops->get_params(cstream, params, cpu_dai);
+		if (ret < 0)
+			goto err;
+	}
+
+	for_each_rtdcom(rtd, rtdcom) {
+		component = rtdcom->component;
+
+		if (!component->driver->compr_ops ||
+		    !component->driver->compr_ops->get_params)
+			continue;
+
+		__ret = component->driver->compr_ops->get_params(cstream, params);
+		if (__ret < 0)
+			ret = __ret;
+	}
+
+err:
+	mutex_unlock(&rtd->pcm_mutex);
+	return ret;
+}
+
+static int soc_compr_get_caps(struct snd_compr_stream *cstream,
+			      struct snd_compr_caps *caps)
+{
+	struct snd_soc_pcm_runtime *rtd = cstream->private_data;
+	struct snd_soc_component *component;
+	struct snd_soc_rtdcom_list *rtdcom;
+	int ret = 0, __ret;
+
+	mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
+
+	for_each_rtdcom(rtd, rtdcom) {
+		component = rtdcom->component;
+
+		if (!component->driver->compr_ops ||
+		    !component->driver->compr_ops->get_caps)
+			continue;
+
+		__ret = component->driver->compr_ops->get_caps(cstream, caps);
+		if (__ret < 0)
+			ret = __ret;
+	}
+
+	mutex_unlock(&rtd->pcm_mutex);
+	return ret;
+}
+
+static int soc_compr_get_codec_caps(struct snd_compr_stream *cstream,
+				    struct snd_compr_codec_caps *codec)
+{
+	struct snd_soc_pcm_runtime *rtd = cstream->private_data;
+	struct snd_soc_component *component;
+	struct snd_soc_rtdcom_list *rtdcom;
+	int ret = 0, __ret;
+
+	mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
+
+	for_each_rtdcom(rtd, rtdcom) {
+		component = rtdcom->component;
+
+		if (!component->driver->compr_ops ||
+		    !component->driver->compr_ops->get_codec_caps)
+			continue;
+
+		__ret = component->driver->compr_ops->get_codec_caps(cstream, codec);
+		if (__ret < 0)
+			ret = __ret;
+	}
+
+	mutex_unlock(&rtd->pcm_mutex);
+	return ret;
+}
+
+static int soc_compr_ack(struct snd_compr_stream *cstream, size_t bytes)
+{
+	struct snd_soc_pcm_runtime *rtd = cstream->private_data;
+	struct snd_soc_component *component;
+	struct snd_soc_rtdcom_list *rtdcom;
+	struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
+	int ret = 0, __ret;
+
+	mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
+
+	if (cpu_dai->driver->cops && cpu_dai->driver->cops->ack) {
+		ret = cpu_dai->driver->cops->ack(cstream, bytes, cpu_dai);
+		if (ret < 0)
+			goto err;
+	}
+
+	for_each_rtdcom(rtd, rtdcom) {
+		component = rtdcom->component;
+
+		if (!component->driver->compr_ops ||
+		    !component->driver->compr_ops->ack)
+			continue;
+
+		__ret = component->driver->compr_ops->ack(cstream, bytes);
+		if (__ret < 0)
+			ret = __ret;
+	}
+
+err:
+	mutex_unlock(&rtd->pcm_mutex);
+	return ret;
+}
+
+static int soc_compr_pointer(struct snd_compr_stream *cstream,
+			     struct snd_compr_tstamp *tstamp)
+{
+	struct snd_soc_pcm_runtime *rtd = cstream->private_data;
+	struct snd_soc_component *component;
+	struct snd_soc_rtdcom_list *rtdcom;
+	int ret = 0, __ret;
+	struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
+
+	mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
+
+	if (cpu_dai->driver->cops && cpu_dai->driver->cops->pointer)
+		cpu_dai->driver->cops->pointer(cstream, tstamp, cpu_dai);
+
+	for_each_rtdcom(rtd, rtdcom) {
+		component = rtdcom->component;
+
+		if (!component->driver->compr_ops ||
+		    !component->driver->compr_ops->pointer)
+			continue;
+
+		__ret = component->driver->compr_ops->pointer(cstream, tstamp);
+		if (__ret < 0)
+			ret = __ret;
+	}
+
+	mutex_unlock(&rtd->pcm_mutex);
+	return ret;
+}
+
+static int soc_compr_copy(struct snd_compr_stream *cstream,
+			  char __user *buf, size_t count)
+{
+	struct snd_soc_pcm_runtime *rtd = cstream->private_data;
+	struct snd_soc_component *component;
+	struct snd_soc_rtdcom_list *rtdcom;
+	int ret = 0;
+
+	mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
+
+	for_each_rtdcom(rtd, rtdcom) {
+		component = rtdcom->component;
+
+		if (!component->driver->compr_ops ||
+		    !component->driver->compr_ops->copy)
+			continue;
+
+		ret = component->driver->compr_ops->copy(cstream, buf, count);
+		break;
+	}
+
+	mutex_unlock(&rtd->pcm_mutex);
+	return ret;
+}
+
+static int soc_compr_set_metadata(struct snd_compr_stream *cstream,
+				  struct snd_compr_metadata *metadata)
+{
+	struct snd_soc_pcm_runtime *rtd = cstream->private_data;
+	struct snd_soc_component *component;
+	struct snd_soc_rtdcom_list *rtdcom;
+	struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
+	int ret = 0, __ret;
+
+	if (cpu_dai->driver->cops && cpu_dai->driver->cops->set_metadata) {
+		ret = cpu_dai->driver->cops->set_metadata(cstream, metadata, cpu_dai);
+		if (ret < 0)
+			return ret;
+	}
+
+	for_each_rtdcom(rtd, rtdcom) {
+		component = rtdcom->component;
+
+		if (!component->driver->compr_ops ||
+		    !component->driver->compr_ops->set_metadata)
+			continue;
+
+		__ret = component->driver->compr_ops->set_metadata(cstream, metadata);
+		if (__ret < 0)
+			ret = __ret;
+	}
+
+	return ret;
+}
+
+static int soc_compr_get_metadata(struct snd_compr_stream *cstream,
+				  struct snd_compr_metadata *metadata)
+{
+	struct snd_soc_pcm_runtime *rtd = cstream->private_data;
+	struct snd_soc_component *component;
+	struct snd_soc_rtdcom_list *rtdcom;
+	struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
+	int ret = 0, __ret;
+
+	if (cpu_dai->driver->cops && cpu_dai->driver->cops->get_metadata) {
+		ret = cpu_dai->driver->cops->get_metadata(cstream, metadata, cpu_dai);
+		if (ret < 0)
+			return ret;
+	}
+
+	for_each_rtdcom(rtd, rtdcom) {
+		component = rtdcom->component;
+
+		if (!component->driver->compr_ops ||
+		    !component->driver->compr_ops->get_metadata)
+			continue;
+
+		__ret = component->driver->compr_ops->get_metadata(cstream, metadata);
+		if (__ret < 0)
+			ret = __ret;
+	}
+
+	return ret;
+}
+
+/* ASoC Compress operations */
+static struct snd_compr_ops soc_compr_ops = {
+	.open		= soc_compr_open,
+	.free		= soc_compr_free,
+	.set_params	= soc_compr_set_params,
+	.set_metadata   = soc_compr_set_metadata,
+	.get_metadata	= soc_compr_get_metadata,
+	.get_params	= soc_compr_get_params,
+	.trigger	= soc_compr_trigger,
+	.pointer	= soc_compr_pointer,
+	.ack		= soc_compr_ack,
+	.get_caps	= soc_compr_get_caps,
+	.get_codec_caps = soc_compr_get_codec_caps
+};
+
+/* ASoC Dynamic Compress operations */
+static struct snd_compr_ops soc_compr_dyn_ops = {
+	.open		= soc_compr_open_fe,
+	.free		= soc_compr_free_fe,
+	.set_params	= soc_compr_set_params_fe,
+	.get_params	= soc_compr_get_params,
+	.set_metadata   = soc_compr_set_metadata,
+	.get_metadata	= soc_compr_get_metadata,
+	.trigger	= soc_compr_trigger_fe,
+	.pointer	= soc_compr_pointer,
+	.ack		= soc_compr_ack,
+	.get_caps	= soc_compr_get_caps,
+	.get_codec_caps = soc_compr_get_codec_caps
+};
+
+/**
+ * snd_soc_new_compress - create a new compress.
+ *
+ * @rtd: The runtime for which we will create compress
+ * @num: the device index number (zero based - shared with normal PCMs)
+ *
+ * Return: 0 for success, else error.
+ */
+int snd_soc_new_compress(struct snd_soc_pcm_runtime *rtd, int num)
+{
+	struct snd_soc_component *component;
+	struct snd_soc_rtdcom_list *rtdcom;
+	struct snd_soc_dai *codec_dai = rtd->codec_dai;
+	struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
+	struct snd_compr *compr;
+	struct snd_pcm *be_pcm;
+	char new_name[64];
+	int ret = 0, direction = 0;
+	int playback = 0, capture = 0;
+
+	if (rtd->num_codecs > 1) {
+		dev_err(rtd->card->dev,
+			"Compress ASoC: Multicodec not supported\n");
+		return -EINVAL;
+	}
+
+	/* check client and interface hw capabilities */
+	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;
+
+	/*
+	 * Compress devices are unidirectional so only one of the directions
+	 * should be set, check for that (xor)
+	 */
+	if (playback + capture != 1) {
+		dev_err(rtd->card->dev,
+			"Compress ASoC: Invalid direction for P %d, C %d\n",
+			playback, capture);
+		return -EINVAL;
+	}
+
+	if (playback)
+		direction = SND_COMPRESS_PLAYBACK;
+	else
+		direction = SND_COMPRESS_CAPTURE;
+
+	compr = kzalloc(sizeof(*compr), GFP_KERNEL);
+	if (!compr)
+		return -ENOMEM;
+
+	compr->ops = devm_kzalloc(rtd->card->dev, sizeof(soc_compr_ops),
+				  GFP_KERNEL);
+	if (!compr->ops) {
+		ret = -ENOMEM;
+		goto compr_err;
+	}
+
+	if (rtd->dai_link->dynamic) {
+		snprintf(new_name, sizeof(new_name), "(%s)",
+			rtd->dai_link->stream_name);
+
+		ret = snd_pcm_new_internal(rtd->card->snd_card, new_name, num,
+				rtd->dai_link->dpcm_playback,
+				rtd->dai_link->dpcm_capture, &be_pcm);
+		if (ret < 0) {
+			dev_err(rtd->card->dev,
+				"Compress ASoC: can't create compressed for %s: %d\n",
+				rtd->dai_link->name, ret);
+			goto compr_err;
+		}
+
+		rtd->pcm = be_pcm;
+		rtd->fe_compr = 1;
+		if (rtd->dai_link->dpcm_playback)
+			be_pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream->private_data = rtd;
+		else if (rtd->dai_link->dpcm_capture)
+			be_pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream->private_data = rtd;
+		memcpy(compr->ops, &soc_compr_dyn_ops, sizeof(soc_compr_dyn_ops));
+	} else {
+		snprintf(new_name, sizeof(new_name), "%s %s-%d",
+			rtd->dai_link->stream_name, codec_dai->name, num);
+
+		memcpy(compr->ops, &soc_compr_ops, sizeof(soc_compr_ops));
+	}
+
+	for_each_rtdcom(rtd, rtdcom) {
+		component = rtdcom->component;
+
+		if (!component->driver->compr_ops ||
+		    !component->driver->compr_ops->copy)
+			continue;
+
+		compr->ops->copy = soc_compr_copy;
+		break;
+	}
+
+	mutex_init(&compr->lock);
+	ret = snd_compress_new(rtd->card->snd_card, num, direction,
+				new_name, compr);
+	if (ret < 0) {
+		component = rtd->codec_dai->component;
+		dev_err(component->dev,
+			"Compress ASoC: can't create compress for codec %s: %d\n",
+			component->name, ret);
+		goto compr_err;
+	}
+
+	/* DAPM dai link stream work */
+	INIT_DELAYED_WORK(&rtd->delayed_work, close_delayed_work);
+
+	rtd->compr = compr;
+	compr->private_data = rtd;
+
+	dev_info(rtd->card->dev, "Compress ASoC: %s <-> %s mapping ok\n",
+		 codec_dai->name, cpu_dai->name);
+	return ret;
+
+compr_err:
+	kfree(compr);
+	return ret;
+}
+EXPORT_SYMBOL_GPL(snd_soc_new_compress);