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-rw-r--r--sound/hda/hdac_device.c30
1 files changed, 30 insertions, 0 deletions
diff --git a/sound/hda/hdac_device.c b/sound/hda/hdac_device.c
index 92604bbcee5f..f75bf5622687 100644
--- a/sound/hda/hdac_device.c
+++ b/sound/hda/hdac_device.c
@@ -519,6 +519,36 @@ void snd_hdac_power_down(struct hdac_device *codec)
pm_runtime_put_autosuspend(dev);
}
EXPORT_SYMBOL_GPL(snd_hdac_power_down);
+
+/**
+ * snd_hdac_power_up_pm - power up the codec
+ * @codec: the codec object
+ *
+ * This function can be called in a recursive code path like init code
+ * which may be called by PM suspend/resume again. OTOH, if a power-up
+ * call must wake up the sleeper (e.g. in a kctl callback), use
+ * snd_hdac_power_up() instead.
+ */
+void snd_hdac_power_up_pm(struct hdac_device *codec)
+{
+ if (!atomic_inc_not_zero(&codec->in_pm))
+ snd_hdac_power_up(codec);
+}
+EXPORT_SYMBOL_GPL(snd_hdac_power_up_pm);
+
+/**
+ * snd_hdac_power_down_pm - power down the codec
+ * @codec: the codec object
+ *
+ * Like snd_hdac_power_up_pm(), this function is used in a recursive
+ * code path like init code which may be called by PM suspend/resume again.
+ */
+void snd_hdac_power_down_pm(struct hdac_device *codec)
+{
+ if (atomic_dec_if_positive(&codec->in_pm) < 0)
+ snd_hdac_power_down(codec);
+}
+EXPORT_SYMBOL_GPL(snd_hdac_power_down_pm);
#endif
/* codec vendor labels */