+/* Deferred mic detection to allow for extra settling time */
+static void wm1811_mic_work(struct work_struct *work)
+{
+ struct wm8994_priv *wm8994 = container_of(work, struct wm8994_priv,
+ mic_work.work);
+ struct wm8994 *control = wm8994->wm8994;
+ struct snd_soc_codec *codec = wm8994->hubs.codec;
+
+ pm_runtime_get_sync(codec->dev);
+
+ /* If required for an external cap force MICBIAS on */
+ if (control->pdata.jd_ext_cap) {
+ snd_soc_dapm_force_enable_pin(&codec->dapm,
+ "MICBIAS2");
+ snd_soc_dapm_sync(&codec->dapm);
+ }
+
+ mutex_lock(&wm8994->accdet_lock);
+
+ dev_dbg(codec->dev, "Starting mic detection\n");
+
+ /*
+ * Start off measument of microphone impedence to find out
+ * what's actually there.
+ */
+ wm8994->mic_detecting = true;
+ wm1811_jackdet_set_mode(codec, WM1811_JACKDET_MODE_MIC);
+
+ snd_soc_update_bits(codec, WM8958_MIC_DETECT_1,
+ WM8958_MICD_ENA, WM8958_MICD_ENA);
+
+ mutex_unlock(&wm8994->accdet_lock);
+
+ pm_runtime_put(codec->dev);
+}
+