Merge tag 'asoc-v3.14-3' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound into for-linus

ASoC: Last updates for the merge window

A couple more fixes plus some extensions to DPCM for use with compressed
audio from Liam which arrived just after my previous pull request.

6 files changed, 347 insertions, 26 deletions

diff --git a/include/sound/soc-dpcm.h b/include/sound/soc-dpcm.h
index 047d657c331c..2883a7a6f9f3 100644
--- a/include/sound/soc-dpcm.h
+++ b/include/sound/soc-dpcm.h
@@ -11,6 +11,7 @@
 #ifndef __LINUX_SND_SOC_DPCM_H
 #define __LINUX_SND_SOC_DPCM_H
 
+#include <linux/slab.h>
 #include <linux/list.h>
 #include <sound/pcm.h>
 
@@ -135,4 +136,25 @@ int soc_dpcm_be_digital_mute(struct snd_soc_pcm_runtime *fe, int mute);
 int soc_dpcm_debugfs_add(struct snd_soc_pcm_runtime *rtd);
 int soc_dpcm_runtime_update(struct snd_soc_card *);
 
+int dpcm_path_get(struct snd_soc_pcm_runtime *fe,
+        int stream, struct snd_soc_dapm_widget_list **list_);
+int dpcm_process_paths(struct snd_soc_pcm_runtime *fe,
+        int stream, struct snd_soc_dapm_widget_list **list, int new);
+int dpcm_be_dai_startup(struct snd_soc_pcm_runtime *fe, int stream);
+int dpcm_be_dai_shutdown(struct snd_soc_pcm_runtime *fe, int stream);
+void dpcm_be_disconnect(struct snd_soc_pcm_runtime *fe, int stream);
+void dpcm_clear_pending_state(struct snd_soc_pcm_runtime *fe, int stream);
+int dpcm_be_dai_hw_free(struct snd_soc_pcm_runtime *fe, int stream);
+int dpcm_be_dai_hw_params(struct snd_soc_pcm_runtime *fe, int tream);
+int dpcm_be_dai_trigger(struct snd_soc_pcm_runtime *fe, int stream, int cmd);
+int dpcm_be_dai_prepare(struct snd_soc_pcm_runtime *fe, int stream);
+int dpcm_dapm_stream_event(struct snd_soc_pcm_runtime *fe, int dir,
+        int event);
+
+static inline void dpcm_path_put(struct snd_soc_dapm_widget_list **list)
+{
+        kfree(*list);
+}
+
+
 #endif
diff --git a/include/sound/soc.h b/include/sound/soc.h
index 03ce45bf8ade..9a001472b96a 100644
--- a/include/sound/soc.h
+++ b/include/sound/soc.h
@@ -1042,6 +1042,7 @@ struct snd_soc_pcm_runtime {
 
         /* Dynamic PCM BE runtime data */
         struct snd_soc_dpcm_runtime dpcm[2];
+        int fe_compr;
 
         long pmdown_time;
         unsigned char pop_wait:1;
diff --git a/sound/soc/soc-compress.c b/sound/soc/soc-compress.c
index 53c9ecdd119f..5e9690c85d8f 100644
--- a/sound/soc/soc-compress.c
+++ b/sound/soc/soc-compress.c
@@ -24,6 +24,7 @@
 #include <sound/compress_driver.h>
 #include <sound/soc.h>
 #include <sound/initval.h>
+#include <sound/soc-dpcm.h>
 
 static int soc_compr_open(struct snd_compr_stream *cstream)
 {
@@ -75,6 +76,98 @@ out:
         return ret;
 }
 
+static int soc_compr_open_fe(struct snd_compr_stream *cstream)
+{
+        struct snd_soc_pcm_runtime *fe = cstream->private_data;
+        struct snd_pcm_substream *fe_substream = fe->pcm->streams[0].substream;
+        struct snd_soc_platform *platform = fe->platform;
+        struct snd_soc_dai *cpu_dai = fe->cpu_dai;
+        struct snd_soc_dai *codec_dai = fe->codec_dai;
+        struct snd_soc_dpcm *dpcm;
+        struct snd_soc_dapm_widget_list *list;
+        int stream;
+        int ret = 0;
+
+        if (cstream->direction == SND_COMPRESS_PLAYBACK)
+                stream = SNDRV_PCM_STREAM_PLAYBACK;
+        else
+                stream = SNDRV_PCM_STREAM_CAPTURE;
+
+        mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
+
+        if (platform->driver->compr_ops && platform->driver->compr_ops->open) {
+                ret = platform->driver->compr_ops->open(cstream);
+                if (ret < 0) {
+                        pr_err("compress asoc: can't open platform %s\n", platform->name);
+                        goto out;
+                }
+        }
+
+        if (fe->dai_link->compr_ops && fe->dai_link->compr_ops->startup) {
+                ret = fe->dai_link->compr_ops->startup(cstream);
+                if (ret < 0) {
+                        pr_err("compress asoc: %s startup failed\n", fe->dai_link->name);
+                        goto machine_err;
+                }
+        }
+
+        fe->dpcm[stream].runtime = fe_substream->runtime;
+
+        if (dpcm_path_get(fe, stream, &list) <= 0) {
+                dev_dbg(fe->dev, "ASoC: %s no valid %s route\n",
+                        fe->dai_link->name, stream ? "capture" : "playback");
+        }
+
+        /* calculate valid and active FE <-> BE dpcms */
+        dpcm_process_paths(fe, stream, &list, 1);
+
+        fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_FE;
+
+        ret = dpcm_be_dai_startup(fe, stream);
+        if (ret < 0) {
+                /* clean up all links */
+                list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be)
+                        dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE;
+
+                dpcm_be_disconnect(fe, stream);
+                fe->dpcm[stream].runtime = NULL;
+                goto fe_err;
+        }
+
+        dpcm_clear_pending_state(fe, stream);
+        dpcm_path_put(&list);
+
+        fe->dpcm[stream].state = SND_SOC_DPCM_STATE_OPEN;
+        fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_NO;
+
+        if (cstream->direction == SND_COMPRESS_PLAYBACK) {
+                cpu_dai->playback_active++;
+                codec_dai->playback_active++;
+        } else {
+                cpu_dai->capture_active++;
+                codec_dai->capture_active++;
+        }
+
+        cpu_dai->active++;
+        codec_dai->active++;
+        fe->codec->active++;
+
+        mutex_unlock(&fe->card->mutex);
+
+        return 0;
+
+fe_err:
+        if (fe->dai_link->compr_ops && fe->dai_link->compr_ops->shutdown)
+                fe->dai_link->compr_ops->shutdown(cstream);
+machine_err:
+        if (platform->driver->compr_ops && platform->driver->compr_ops->free)
+                platform->driver->compr_ops->free(cstream);
+out:
+        fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_NO;
+        mutex_unlock(&fe->card->mutex);
+        return ret;
+}
+
 /*
  * Power down the audio subsystem pmdown_time msecs after close is called.
  * This is to ensure there are no pops or clicks in between any music tracks
@@ -164,6 +257,65 @@ static int soc_compr_free(struct snd_compr_stream *cstream)
         return 0;
 }
 
+static int soc_compr_free_fe(struct snd_compr_stream *cstream)
+{
+        struct snd_soc_pcm_runtime *fe = cstream->private_data;
+        struct snd_soc_platform *platform = fe->platform;
+        struct snd_soc_dai *cpu_dai = fe->cpu_dai;
+        struct snd_soc_dai *codec_dai = fe->codec_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;
+                cpu_dai->playback_active--;
+                codec_dai->playback_active--;
+        } else {
+                stream = SNDRV_PCM_STREAM_CAPTURE;
+                cpu_dai->capture_active--;
+                codec_dai->capture_active--;
+        }
+
+        cpu_dai->active--;
+        codec_dai->active--;
+        fe->codec->active--;
+
+        fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_FE;
+
+        ret = dpcm_be_dai_hw_free(fe, stream);
+        if (ret < 0)
+                dev_err(fe->dev, "compressed hw_free failed %d\n", ret);
+
+        ret = dpcm_be_dai_shutdown(fe, stream);
+
+        /* mark FE's links ready to prune */
+        list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be)
+                dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE;
+
+        if (stream == SNDRV_PCM_STREAM_PLAYBACK)
+                dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_STOP);
+        else
+                dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_STOP);
+
+        fe->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE;
+        fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_NO;
+
+        dpcm_be_disconnect(fe, stream);
+
+        fe->dpcm[stream].runtime = NULL;
+
+        if (fe->dai_link->compr_ops && fe->dai_link->compr_ops->shutdown)
+                fe->dai_link->compr_ops->shutdown(cstream);
+
+        if (platform->driver->compr_ops && platform->driver->compr_ops->free)
+                platform->driver->compr_ops->free(cstream);
+
+        mutex_unlock(&fe->card->mutex);
+        return 0;
+}
+
 static int soc_compr_trigger(struct snd_compr_stream *cstream, int cmd)
 {
 
@@ -194,6 +346,59 @@ out:
         return ret;
 }
 
+static int soc_compr_trigger_fe(struct snd_compr_stream *cstream, int cmd)
+{
+        struct snd_soc_pcm_runtime *fe = cstream->private_data;
+        struct snd_soc_platform *platform = fe->platform;
+        int ret = 0, stream;
+
+        if (cmd == SND_COMPR_TRIGGER_PARTIAL_DRAIN ||
+                cmd == SND_COMPR_TRIGGER_DRAIN) {
+
+                if (platform->driver->compr_ops &&
+                        platform->driver->compr_ops->trigger)
+                return platform->driver->compr_ops->trigger(cstream, cmd);
+        }
+
+        if (cstream->direction == SND_COMPRESS_PLAYBACK)
+                stream = SNDRV_PCM_STREAM_PLAYBACK;
+        else
+                stream = SNDRV_PCM_STREAM_CAPTURE;
+
+
+        mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
+
+        if (platform->driver->compr_ops && platform->driver->compr_ops->trigger) {
+                ret = platform->driver->compr_ops->trigger(cstream, cmd);
+                if (ret < 0)
+                        goto out;
+        }
+
+        fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_FE;
+
+        ret = dpcm_be_dai_trigger(fe, stream, cmd);
+
+        switch (cmd) {
+        case SNDRV_PCM_TRIGGER_START:
+        case SNDRV_PCM_TRIGGER_RESUME:
+        case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
+                fe->dpcm[stream].state = SND_SOC_DPCM_STATE_START;
+                break;
+        case SNDRV_PCM_TRIGGER_STOP:
+        case SNDRV_PCM_TRIGGER_SUSPEND:
+                fe->dpcm[stream].state = SND_SOC_DPCM_STATE_STOP;
+                break;
+        case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
+                fe->dpcm[stream].state = SND_SOC_DPCM_STATE_PAUSED;
+                break;
+        }
+
+out:
+        fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_NO;
+        mutex_unlock(&fe->card->mutex);
+        return ret;
+}
+
 static int soc_compr_set_params(struct snd_compr_stream *cstream,
                                         struct snd_compr_params *params)
 {
@@ -241,6 +446,64 @@ err:
         return ret;
 }
 
+static int soc_compr_set_params_fe(struct snd_compr_stream *cstream,
+                                        struct snd_compr_params *params)
+{
+        struct snd_soc_pcm_runtime *fe = cstream->private_data;
+        struct snd_pcm_substream *fe_substream = fe->pcm->streams[0].substream;
+        struct snd_soc_platform *platform = fe->platform;
+        int ret = 0, stream;
+
+        if (cstream->direction == SND_COMPRESS_PLAYBACK)
+                stream = SNDRV_PCM_STREAM_PLAYBACK;
+        else
+                stream = SNDRV_PCM_STREAM_CAPTURE;
+
+        mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
+
+        if (platform->driver->compr_ops && platform->driver->compr_ops->set_params) {
+                ret = platform->driver->compr_ops->set_params(cstream, params);
+                if (ret < 0)
+                        goto out;
+        }
+
+        if (fe->dai_link->compr_ops && fe->dai_link->compr_ops->set_params) {
+                ret = fe->dai_link->compr_ops->set_params(cstream);
+                if (ret < 0)
+                        goto out;
+        }
+
+        /*
+         * Create an empty hw_params for the BE as the machine driver must
+         * fix this up to match DSP decoder and ASRC configuration.
+         * I.e. machine driver fixup for compressed BE is mandatory.
+         */
+        memset(&fe->dpcm[fe_substream->stream].hw_params, 0,
+                sizeof(struct snd_pcm_hw_params));
+
+        fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_FE;
+
+        ret = dpcm_be_dai_hw_params(fe, stream);
+        if (ret < 0)
+                goto out;
+
+        ret = dpcm_be_dai_prepare(fe, stream);
+        if (ret < 0)
+                goto out;
+
+        if (stream == SNDRV_PCM_STREAM_PLAYBACK)
+                dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_START);
+        else
+                dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_START);
+
+        fe->dpcm[stream].state = SND_SOC_DPCM_STATE_PREPARE;
+
+out:
+        fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_NO;
+        mutex_unlock(&fe->card->mutex);
+        return ret;
+}
+
 static int soc_compr_get_params(struct snd_compr_stream *cstream,
                                         struct snd_codec *params)
 {
@@ -360,6 +623,7 @@ static int soc_compr_get_metadata(struct snd_compr_stream *cstream,
 
         return ret;
 }
+
 /* ASoC Compress operations */
 static struct snd_compr_ops soc_compr_ops = {
         .open           = soc_compr_open,
@@ -375,6 +639,21 @@ static struct snd_compr_ops soc_compr_ops = {
         .get_codec_caps = soc_compr_get_codec_caps
 };
 
+/* ASoC Dynamic Compress operations */
+static struct snd_compr_ops soc_compr_dyn_ops = {
+        .open           = soc_compr_open_fe,
+        .free           = soc_compr_free_fe,
+        .set_params     = soc_compr_set_params_fe,
+        .get_params     = soc_compr_get_params,
+        .set_metadata   = soc_compr_set_metadata,
+        .get_metadata   = soc_compr_get_metadata,
+        .trigger        = soc_compr_trigger_fe,
+        .pointer        = soc_compr_pointer,
+        .ack            = soc_compr_ack,
+        .get_caps       = soc_compr_get_caps,
+        .get_codec_caps = soc_compr_get_codec_caps
+};
+
 /* create a new compress */
 int soc_new_compress(struct snd_soc_pcm_runtime *rtd, int num)
 {
@@ -383,6 +662,7 @@ int soc_new_compress(struct snd_soc_pcm_runtime *rtd, int num)
         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;
 
@@ -410,7 +690,26 @@ int soc_new_compress(struct snd_soc_pcm_runtime *rtd, int num)
                 ret = -ENOMEM;
                 goto compr_err;
         }
-        memcpy(compr->ops, &soc_compr_ops, sizeof(soc_compr_ops));
+
+        if (rtd->dai_link->dynamic) {
+                snprintf(new_name, sizeof(new_name), "(%s)",
+                        rtd->dai_link->stream_name);
+
+                ret = snd_pcm_new_internal(rtd->card->snd_card, new_name, num,
+                                1, 0, &be_pcm);
+                if (ret < 0) {
+                        dev_err(rtd->card->dev, "ASoC: can't create compressed for %s\n",
+                                rtd->dai_link->name);
+                        goto compr_err;
+                }
+
+                rtd->pcm = be_pcm;
+                rtd->fe_compr = 1;
+                be_pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream->private_data = rtd;
+                be_pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream->private_data = rtd;
+                memcpy(compr->ops, &soc_compr_dyn_ops, sizeof(soc_compr_dyn_ops));
+        } else
+                memcpy(compr->ops, &soc_compr_ops, sizeof(soc_compr_ops));
 
         /* Add copy callback for not memory mapped DSPs */
         if (platform->driver->compr_ops && platform->driver->compr_ops->copy)
diff --git a/sound/soc/soc-dapm.c b/sound/soc/soc-dapm.c
index 2a44fe9122a2..dc8ff13187f7 100644
--- a/sound/soc/soc-dapm.c
+++ b/sound/soc/soc-dapm.c
@@ -2476,7 +2476,8 @@ err:
 }
 
 static int snd_soc_dapm_add_route(struct snd_soc_dapm_context *dapm,
-                                  const struct snd_soc_dapm_route *route)
+                                  const struct snd_soc_dapm_route *route,
+                                  unsigned int is_prefixed)
 {
         struct snd_soc_dapm_widget *wsource = NULL, *wsink = NULL, *w;
         struct snd_soc_dapm_widget *wtsource = NULL, *wtsink = NULL;
@@ -2486,7 +2487,7 @@ static int snd_soc_dapm_add_route(struct snd_soc_dapm_context *dapm,
         char prefixed_source[80];
         int ret;
 
-        if (dapm->codec && dapm->codec->name_prefix) {
+        if (dapm->codec && dapm->codec->name_prefix && !is_prefixed) {
                 snprintf(prefixed_sink, sizeof(prefixed_sink), "%s %s",
                          dapm->codec->name_prefix, route->sink);
                 sink = prefixed_sink;
@@ -2614,7 +2615,7 @@ int snd_soc_dapm_add_routes(struct snd_soc_dapm_context *dapm,
 
         mutex_lock_nested(&dapm->card->dapm_mutex, SND_SOC_DAPM_CLASS_INIT);
         for (i = 0; i < num; i++) {
-                r = snd_soc_dapm_add_route(dapm, route);
+                r = snd_soc_dapm_add_route(dapm, route, false);
                 if (r < 0) {
                         dev_err(dapm->dev, "ASoC: Failed to add route %s -> %s -> %s\n",
                                 route->source,
@@ -3670,7 +3671,7 @@ void snd_soc_dapm_connect_dai_link_widgets(struct snd_soc_card *card)
                                 cpu_dai->codec->name, r.source,
                                 codec_dai->platform->name, r.sink);
 
-                        snd_soc_dapm_add_route(&card->dapm, &r);
+                        snd_soc_dapm_add_route(&card->dapm, &r, true);
                 }
 
                 /* connect BE DAI capture if widgets are valid */
@@ -3681,7 +3682,7 @@ void snd_soc_dapm_connect_dai_link_widgets(struct snd_soc_card *card)
                                 codec_dai->codec->name, r.source,
                                 cpu_dai->platform->name, r.sink);
 
-                        snd_soc_dapm_add_route(&card->dapm, &r);
+                        snd_soc_dapm_add_route(&card->dapm, &r, true);
                 }
 
         }
diff --git a/sound/soc/soc-generic-dmaengine-pcm.c b/sound/soc/soc-generic-dmaengine-pcm.c
index 560a7787d8a7..5bace124ef43 100644
--- a/sound/soc/soc-generic-dmaengine-pcm.c
+++ b/sound/soc/soc-generic-dmaengine-pcm.c
@@ -176,17 +176,20 @@ static struct dma_chan *dmaengine_pcm_compat_request_channel(
 {
         struct dmaengine_pcm *pcm = soc_platform_to_pcm(rtd->platform);
         struct snd_dmaengine_dai_dma_data *dma_data;
+        dma_filter_fn fn = NULL;
 
         dma_data = snd_soc_dai_get_dma_data(rtd->cpu_dai, substream);
 
         if ((pcm->flags & SND_DMAENGINE_PCM_FLAG_HALF_DUPLEX) && pcm->chan[0])
                 return pcm->chan[0];
 
-        if (pcm->config->compat_request_channel)
+        if (pcm->config && pcm->config->compat_request_channel)
                 return pcm->config->compat_request_channel(rtd, substream);
 
-        return snd_dmaengine_pcm_request_channel(pcm->config->compat_filter_fn,
-                                                 dma_data->filter_data);
+        if (pcm->config)
+                fn = pcm->config->compat_filter_fn;
+
+        return snd_dmaengine_pcm_request_channel(fn, dma_data->filter_data);
 }
 
 static bool dmaengine_pcm_can_report_residue(struct dma_chan *chan)
diff --git a/sound/soc/soc-pcm.c b/sound/soc/soc-pcm.c
index 5932971cf54d..47e1ce771e65 100644
--- a/sound/soc/soc-pcm.c
+++ b/sound/soc/soc-pcm.c
@@ -58,7 +58,7 @@ int snd_soc_set_runtime_hwparams(struct snd_pcm_substream *substream,
 EXPORT_SYMBOL_GPL(snd_soc_set_runtime_hwparams);
 
 /* DPCM stream event, send event to FE and all active BEs. */
-static int dpcm_dapm_stream_event(struct snd_soc_pcm_runtime *fe, int dir,
+int dpcm_dapm_stream_event(struct snd_soc_pcm_runtime *fe, int dir,
         int event)
 {
         struct snd_soc_dpcm *dpcm;
@@ -885,7 +885,7 @@ static void dpcm_be_reparent(struct snd_soc_pcm_runtime *fe,
 }
 
 /* disconnect a BE and FE */
-static void dpcm_be_disconnect(struct snd_soc_pcm_runtime *fe, int stream)
+void dpcm_be_disconnect(struct snd_soc_pcm_runtime *fe, int stream)
 {
         struct snd_soc_dpcm *dpcm, *d;
 
@@ -981,7 +981,7 @@ static int widget_in_list(struct snd_soc_dapm_widget_list *list,
         return 0;
 }
 
-static int dpcm_path_get(struct snd_soc_pcm_runtime *fe,
+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;
@@ -1003,11 +1003,6 @@ static int dpcm_path_get(struct snd_soc_pcm_runtime *fe,
         return paths;
 }
 
-static inline void dpcm_path_put(struct snd_soc_dapm_widget_list **list)
-{
-        kfree(*list);
-}
-
 static int dpcm_prune_paths(struct snd_soc_pcm_runtime *fe, int stream,
         struct snd_soc_dapm_widget_list **list_)
 {
@@ -1077,7 +1072,7 @@ static int dpcm_add_paths(struct snd_soc_pcm_runtime *fe, int stream,
                         continue;
 
                 /* don't connect if FE is not running */
-                if (!fe->dpcm[stream].runtime)
+                if (!fe->dpcm[stream].runtime && !fe->fe_compr)
                         continue;
 
                 /* newly connected FE and BE */
@@ -1102,7 +1097,7 @@ static int dpcm_add_paths(struct snd_soc_pcm_runtime *fe, int stream,
  * Find the corresponding BE DAIs that source or sink audio to this
  * FE substream.
  */
-static int dpcm_process_paths(struct snd_soc_pcm_runtime *fe,
+int dpcm_process_paths(struct snd_soc_pcm_runtime *fe,
         int stream, struct snd_soc_dapm_widget_list **list, int new)
 {
         if (new)
@@ -1111,7 +1106,7 @@ static int dpcm_process_paths(struct snd_soc_pcm_runtime *fe,
                 return dpcm_prune_paths(fe, stream, list);
 }
 
-static void dpcm_clear_pending_state(struct snd_soc_pcm_runtime *fe, int stream)
+void dpcm_clear_pending_state(struct snd_soc_pcm_runtime *fe, int stream)
 {
         struct snd_soc_dpcm *dpcm;
 
@@ -1149,7 +1144,7 @@ static void dpcm_be_dai_startup_unwind(struct snd_soc_pcm_runtime *fe,
         }
 }
 
-static int dpcm_be_dai_startup(struct snd_soc_pcm_runtime *fe, int stream)
+int dpcm_be_dai_startup(struct snd_soc_pcm_runtime *fe, int stream)
 {
         struct snd_soc_dpcm *dpcm;
         int err, count = 0;
@@ -1301,7 +1296,7 @@ be_err:
         return ret;
 }
 
-static int dpcm_be_dai_shutdown(struct snd_soc_pcm_runtime *fe, int stream)
+int dpcm_be_dai_shutdown(struct snd_soc_pcm_runtime *fe, int stream)
 {
         struct snd_soc_dpcm *dpcm;
 
@@ -1362,7 +1357,7 @@ static int dpcm_fe_dai_shutdown(struct snd_pcm_substream *substream)
         return 0;
 }
 
-static int dpcm_be_dai_hw_free(struct snd_soc_pcm_runtime *fe, int stream)
+int dpcm_be_dai_hw_free(struct snd_soc_pcm_runtime *fe, int stream)
 {
         struct snd_soc_dpcm *dpcm;
 
@@ -1427,7 +1422,7 @@ static int dpcm_fe_dai_hw_free(struct snd_pcm_substream *substream)
         return 0;
 }
 
-static int dpcm_be_dai_hw_params(struct snd_soc_pcm_runtime *fe, int stream)
+int dpcm_be_dai_hw_params(struct snd_soc_pcm_runtime *fe, int stream)
 {
         struct snd_soc_dpcm *dpcm;
         int ret;
@@ -1557,7 +1552,7 @@ static int dpcm_do_trigger(struct snd_soc_dpcm *dpcm,
         return ret;
 }
 
-static int dpcm_be_dai_trigger(struct snd_soc_pcm_runtime *fe, int stream,
+int dpcm_be_dai_trigger(struct snd_soc_pcm_runtime *fe, int stream,
                                int cmd)
 {
         struct snd_soc_dpcm *dpcm;
@@ -1725,7 +1720,7 @@ out:
         return ret;
 }
 
-static int dpcm_be_dai_prepare(struct snd_soc_pcm_runtime *fe, int stream)
+int dpcm_be_dai_prepare(struct snd_soc_pcm_runtime *fe, int stream)
 {
         struct snd_soc_dpcm *dpcm;
         int ret = 0;