ASoC: wm8994: Enabling VMID should take a runtime PM reference

We can enable VMID independently of the bias in some use cases so we need
to ensure that the core device is powered up.

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Cc: stable@vger.kernel.org

diff --git a/sound/soc/codecs/wm8994.c b/sound/soc/codecs/wm8994.c
index 8623950d55f88db147cbe5155879ebdaa36c8392..81795ebcab1791481074209ac14a1c7dd9c638e0 100644 (file)
--- a/sound/soc/codecs/wm8994.c
+++ b/sound/soc/codecs/wm8994.c
@@ -770,6 +770,8 @@ static void vmid_reference(struct snd_soc_codec *codec)
 {
        struct wm8994_priv *wm8994 = snd_soc_codec_get_drvdata(codec);
 
+       pm_runtime_get_sync(codec->dev);
+
        wm8994->vmid_refcount++;
 
        dev_dbg(codec->dev, "Referencing VMID, refcount is now %d\n",
@@ -837,6 +839,8 @@ static void vmid_dereference(struct snd_soc_codec *codec)
                                    WM8994_VMID_BUF_ENA |
                                    WM8994_VMID_RAMP_MASK, 0);
        }
+
+       pm_runtime_put(codec->dev);
 }
 
 static int vmid_event(struct snd_soc_dapm_widget *w,