5 files changed, 75 insertions, 11 deletions

diff --git a/include/sound/soc-dai.h b/include/sound/soc-dai.h
index 243d3b689699..71f27c403194 100644
--- a/include/sound/soc-dai.h
+++ b/include/sound/soc-dai.h
@@ -123,6 +123,8 @@ int snd_soc_dai_set_tristate(struct snd_soc_dai *dai, int tristate);
 int snd_soc_dai_digital_mute(struct snd_soc_dai *dai, int mute,
                              int direction);
 
+int snd_soc_dai_is_dummy(struct snd_soc_dai *dai);
+
 struct snd_soc_dai_ops {
         /*
          * DAI clocking configuration, all optional.
diff --git a/include/sound/soc-dapm.h b/include/sound/soc-dapm.h
index 56ebdfca6273..68d92e36facd 100644
--- a/include/sound/soc-dapm.h
+++ b/include/sound/soc-dapm.h
@@ -412,6 +412,7 @@ int snd_soc_dapm_new_controls(struct snd_soc_dapm_context *dapm,
 int snd_soc_dapm_new_dai_widgets(struct snd_soc_dapm_context *dapm,
                                  struct snd_soc_dai *dai);
 int snd_soc_dapm_link_dai_widgets(struct snd_soc_card *card);
+void snd_soc_dapm_connect_dai_link_widgets(struct snd_soc_card *card);
 int snd_soc_dapm_new_pcm(struct snd_soc_card *card,
                          const struct snd_soc_pcm_stream *params,
                          struct snd_soc_dapm_widget *source,
diff --git a/sound/soc/soc-core.c b/sound/soc/soc-core.c
index 18583660efbc..fe1df50805a3 100644
--- a/sound/soc/soc-core.c
+++ b/sound/soc/soc-core.c
@@ -1728,6 +1728,7 @@ static int snd_soc_instantiate_card(struct snd_soc_card *card)
         }
 
         snd_soc_dapm_link_dai_widgets(card);
+        snd_soc_dapm_connect_dai_link_widgets(card);
 
         if (card->controls)
                 snd_soc_add_card_controls(card, card->controls, card->num_controls);
diff --git a/sound/soc/soc-dapm.c b/sound/soc/soc-dapm.c
index 67e63ab1f11e..2a44fe9122a2 100644
--- a/sound/soc/soc-dapm.c
+++ b/sound/soc/soc-dapm.c
@@ -371,12 +371,16 @@ static void dapm_reset(struct snd_soc_card *card)
         }
 }
 
-static int soc_widget_read(struct snd_soc_dapm_widget *w, int reg)
+static int soc_widget_read(struct snd_soc_dapm_widget *w, int reg,
+        unsigned int *value)
 {
-        if (w->codec)
-                return snd_soc_read(w->codec, reg);
-        else if (w->platform)
-                return snd_soc_platform_read(w->platform, reg);
+        if (w->codec) {
+                *value = snd_soc_read(w->codec, reg);
+                return 0;
+        } else if (w->platform) {
+                *value = snd_soc_platform_read(w->platform, reg);
+                return 0;
+        }
 
         dev_err(w->dapm->dev, "ASoC: no valid widget read method\n");
         return -1;
@@ -430,13 +434,12 @@ static int soc_widget_update_bits_locked(struct snd_soc_dapm_widget *w,
                         return ret;
         } else {
                 soc_widget_lock(w);
-                ret = soc_widget_read(w, reg);
+                ret = soc_widget_read(w, reg, &old);
                 if (ret < 0) {
                         soc_widget_unlock(w);
                         return ret;
                 }
 
-                old = ret;
                 new = (old & ~mask) | (value & mask);
                 change = old != new;
                 if (change) {
@@ -513,7 +516,7 @@ static void dapm_set_path_status(struct snd_soc_dapm_widget *w,
                 unsigned int invert = mc->invert;
 
                 if (reg != SND_SOC_NOPM) {
-                        val = soc_widget_read(w, reg);
+                        soc_widget_read(w, reg, &val);
                         val = (val >> shift) & mask;
                         if (invert)
                                 val = max - val;
@@ -529,7 +532,7 @@ static void dapm_set_path_status(struct snd_soc_dapm_widget *w,
                         w->kcontrol_news[i].private_value;
                 int val, item;
 
-                val = soc_widget_read(w, e->reg);
+                soc_widget_read(w, e->reg, &val);
                 item = (val >> e->shift_l) & e->mask;
 
                 if (item < e->max && !strcmp(p->name, e->texts[item]))
@@ -558,7 +561,7 @@ static void dapm_set_path_status(struct snd_soc_dapm_widget *w,
                         w->kcontrol_news[i].private_value;
                 int val, item;
 
-                val = soc_widget_read(w, e->reg);
+                soc_widget_read(w, e->reg, &val);
                 val = (val >> e->shift_l) & e->mask;
                 for (item = 0; item < e->max; item++) {
                         if (val == e->values[item])
@@ -2782,7 +2785,8 @@ int snd_soc_dapm_new_widgets(struct snd_soc_card *card)
 
                 /* Read the initial power state from the device */
                 if (w->reg >= 0) {
-                        val = soc_widget_read(w, w->reg) >> w->shift;
+                        soc_widget_read(w, w->reg, &val);
+                        val = val >> w->shift;
                         val &= w->mask;
                         if (val == w->on_val)
                                 w->power = 1;
@@ -3634,6 +3638,55 @@ int snd_soc_dapm_link_dai_widgets(struct snd_soc_card *card)
         return 0;
 }
 
+void snd_soc_dapm_connect_dai_link_widgets(struct snd_soc_card *card)
+{
+        struct snd_soc_pcm_runtime *rtd = card->rtd;
+        struct snd_soc_dai *cpu_dai, *codec_dai;
+        struct snd_soc_dapm_route r;
+        int i;
+
+        memset(&r, 0, sizeof(r));
+
+        /* for each BE DAI link... */
+        for (i = 0; i < card->num_rtd; i++) {
+                rtd = &card->rtd[i];
+                cpu_dai = rtd->cpu_dai;
+                codec_dai = rtd->codec_dai;
+
+                /* dynamic FE links have no fixed DAI mapping */
+                if (rtd->dai_link->dynamic)
+                        continue;
+
+                /* there is no point in connecting BE DAI links with dummies */
+                if (snd_soc_dai_is_dummy(codec_dai) ||
+                        snd_soc_dai_is_dummy(cpu_dai))
+                        continue;
+
+                /* connect BE DAI playback if widgets are valid */
+                if (codec_dai->playback_widget && cpu_dai->playback_widget) {
+                        r.source = cpu_dai->playback_widget->name;
+                        r.sink = codec_dai->playback_widget->name;
+                        dev_dbg(rtd->dev, "connected DAI link %s:%s -> %s:%s\n",
+                                cpu_dai->codec->name, r.source,
+                                codec_dai->platform->name, r.sink);
+
+                        snd_soc_dapm_add_route(&card->dapm, &r);
+                }
+
+                /* connect BE DAI capture if widgets are valid */
+                if (codec_dai->capture_widget && cpu_dai->capture_widget) {
+                        r.source = codec_dai->capture_widget->name;
+                        r.sink = cpu_dai->capture_widget->name;
+                        dev_dbg(rtd->dev, "connected DAI link %s:%s -> %s:%s\n",
+                                codec_dai->codec->name, r.source,
+                                cpu_dai->platform->name, r.sink);
+
+                        snd_soc_dapm_add_route(&card->dapm, &r);
+                }
+
+        }
+}
+
 static void soc_dapm_stream_event(struct snd_soc_pcm_runtime *rtd, int stream,
         int event)
 {
diff --git a/sound/soc/soc-utils.c b/sound/soc/soc-utils.c
index 6ebdfd9a1a1d..7f22ca35a413 100644
--- a/sound/soc/soc-utils.c
+++ b/sound/soc/soc-utils.c
@@ -119,6 +119,13 @@ static struct snd_soc_dai_driver dummy_dai = {
          },
 };
 
+int snd_soc_dai_is_dummy(struct snd_soc_dai *dai)
+{
+        if (dai->driver == &dummy_dai)
+                return 1;
+        return 0;
+}
+
 static int snd_soc_dummy_probe(struct platform_device *pdev)
 {
         int ret;