2 files changed, 58 insertions, 5 deletions

diff --git a/sound/soc/soc-core.c b/sound/soc/soc-core.c
index 95739767ec45..8661e5b4adb1 100644
--- a/sound/soc/soc-core.c
+++ b/sound/soc/soc-core.c
@@ -927,8 +927,19 @@ static int soc_suspend(struct device *dev)
                                 SND_SOC_DAPM_STREAM_SUSPEND);
         }
 
-        if (codec_dev->suspend)
-                codec_dev->suspend(pdev, PMSG_SUSPEND);
+        /* If there are paths active then the CODEC will be held with
+         * bias _ON and should not be suspended. */
+        if (codec_dev->suspend) {
+                switch (codec->bias_level) {
+                case SND_SOC_BIAS_STANDBY:
+                case SND_SOC_BIAS_OFF:
+                        codec_dev->suspend(pdev, PMSG_SUSPEND);
+                        break;
+                default:
+                        dev_dbg(socdev->dev, "CODEC is on over suspend\n");
+                        break;
+                }
+        }
 
         for (i = 0; i < card->num_links; i++) {
                 struct snd_soc_dai *cpu_dai = card->dai_link[i].cpu_dai;
@@ -975,8 +986,21 @@ static void soc_resume_deferred(struct work_struct *work)
                         cpu_dai->resume(cpu_dai);
         }
 
-        if (codec_dev->resume)
-                codec_dev->resume(pdev);
+        /* If the CODEC was idle over suspend then it will have been
+         * left with bias OFF or STANDBY and suspended so we must now
+         * resume.  Otherwise the suspend was suppressed.
+         */
+        if (codec_dev->resume) {
+                switch (codec->bias_level) {
+                case SND_SOC_BIAS_STANDBY:
+                case SND_SOC_BIAS_OFF:
+                        codec_dev->resume(pdev);
+                        break;
+                default:
+                        dev_dbg(socdev->dev, "CODEC was on over suspend\n");
+                        break;
+                }
+        }
 
         for (i = 0; i < codec->num_dai; i++) {
                 char *stream = codec->dai[i].playback.stream_name;
diff --git a/sound/soc/soc-dapm.c b/sound/soc/soc-dapm.c
index 8c8b291320a8..fefb6c44fc81 100644
--- a/sound/soc/soc-dapm.c
+++ b/sound/soc/soc-dapm.c
@@ -441,7 +441,9 @@ static int snd_soc_dapm_suspend_check(struct snd_soc_dapm_widget *widget)
         switch (snd_power_get_state(codec->card)) {
         case SNDRV_CTL_POWER_D3hot:
         case SNDRV_CTL_POWER_D3cold:
-                return 0;
+                if (widget->ignore_suspend)
+                        pr_debug("%s ignoring suspend\n", widget->name);
+                return widget->ignore_suspend;
         default:
                 return 1;
         }
@@ -2137,6 +2139,33 @@ int snd_soc_dapm_get_pin_status(struct snd_soc_codec *codec, const char *pin)
 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_pin_status);
 
 /**
+ * snd_soc_dapm_ignore_suspend - ignore suspend status for DAPM endpoint
+ * @codec: audio codec
+ * @pin: audio signal pin endpoint (or start point)
+ *
+ * Mark the given endpoint or pin as ignoring suspend.  When the
+ * system is disabled a path between two endpoints flagged as ignoring
+ * suspend will not be disabled.  The path must already be enabled via
+ * normal means at suspend time, it will not be turned on if it was not
+ * already enabled.
+ */
+int snd_soc_dapm_ignore_suspend(struct snd_soc_codec *codec, const char *pin)
+{
+        struct snd_soc_dapm_widget *w;
+
+        list_for_each_entry(w, &codec->dapm_widgets, list) {
+                if (!strcmp(w->name, pin)) {
+                        w->ignore_suspend = 1;
+                        return 0;
+                }
+        }
+
+        pr_err("Unknown DAPM pin: %s\n", pin);
+        return -EINVAL;
+}
+EXPORT_SYMBOL_GPL(snd_soc_dapm_ignore_suspend);
+
+/**
  * snd_soc_dapm_free - free dapm resources
  * @socdev: SoC device
  *