1 files changed, 46 insertions, 0 deletions

diff --git a/sound/soc/omap/omap-mcpdm.c b/sound/soc/omap/omap-mcpdm.c
index 11bd07cdce22..74d6e6fdcfd0 100644
--- a/sound/soc/omap/omap-mcpdm.c
+++ b/sound/soc/omap/omap-mcpdm.c
@@ -66,6 +66,9 @@ struct omap_mcpdm {
         /* McPDM needs to be restarted due to runtime reconfiguration */
         bool restart;
 
+        /* pm state for suspend/resume handling */
+        int pm_active_count;
+
         struct snd_dmaengine_dai_dma_data dma_data[2];
 };
 
@@ -422,12 +425,55 @@ static int omap_mcpdm_remove(struct snd_soc_dai *dai)
         return 0;
 }
 
+#ifdef CONFIG_PM_SLEEP
+static int omap_mcpdm_suspend(struct snd_soc_dai *dai)
+{
+        struct omap_mcpdm *mcpdm = snd_soc_dai_get_drvdata(dai);
+
+        if (dai->active) {
+                omap_mcpdm_stop(mcpdm);
+                omap_mcpdm_close_streams(mcpdm);
+        }
+
+        mcpdm->pm_active_count = 0;
+        while (pm_runtime_active(mcpdm->dev)) {
+                pm_runtime_put_sync(mcpdm->dev);
+                mcpdm->pm_active_count++;
+        }
+
+        return 0;
+}
+
+static int omap_mcpdm_resume(struct snd_soc_dai *dai)
+{
+        struct omap_mcpdm *mcpdm = snd_soc_dai_get_drvdata(dai);
+
+        if (mcpdm->pm_active_count) {
+                while (mcpdm->pm_active_count--)
+                        pm_runtime_get_sync(mcpdm->dev);
+
+                if (dai->active) {
+                        omap_mcpdm_open_streams(mcpdm);
+                        omap_mcpdm_start(mcpdm);
+                }
+        }
+
+
+        return 0;
+}
+#else
+#define omap_mcpdm_suspend NULL
+#define omap_mcpdm_resume NULL
+#endif
+
 #define OMAP_MCPDM_RATES        (SNDRV_PCM_RATE_88200 | SNDRV_PCM_RATE_96000)
 #define OMAP_MCPDM_FORMATS      SNDRV_PCM_FMTBIT_S32_LE
 
 static struct snd_soc_dai_driver omap_mcpdm_dai = {
         .probe = omap_mcpdm_probe,
         .remove = omap_mcpdm_remove,
+        .suspend = omap_mcpdm_suspend,
+        .resume = omap_mcpdm_resume,
         .probe_order = SND_SOC_COMP_ORDER_LATE,
         .remove_order = SND_SOC_COMP_ORDER_EARLY,
         .playback = {