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authorAndré Fabian Silva Delgado <emulatorman@parabola.nu>2016-04-16 15:30:54 -0300
committerAndré Fabian Silva Delgado <emulatorman@parabola.nu>2016-04-16 15:30:54 -0300
commitbdcfd44fb5b5fb8fd660e7f93f1095c507481024 (patch)
treee423b07154d422b711ddfadedb87c43317d3c4f6 /sound/hda/hdac_device.c
parent4a327fcef90ba27150a3e8741441b68c605ae248 (diff)
Linux-libre 4.5.1-gnupck-4.5.1-gnu
Diffstat (limited to 'sound/hda/hdac_device.c')
-rw-r--r--sound/hda/hdac_device.c16
1 files changed, 16 insertions, 0 deletions
diff --git a/sound/hda/hdac_device.c b/sound/hda/hdac_device.c
index e361024ea..d1a4d6973 100644
--- a/sound/hda/hdac_device.c
+++ b/sound/hda/hdac_device.c
@@ -611,6 +611,22 @@ int snd_hdac_power_up_pm(struct hdac_device *codec)
}
EXPORT_SYMBOL_GPL(snd_hdac_power_up_pm);
+/* like snd_hdac_power_up_pm(), but only increment the pm count when
+ * already powered up. Returns -1 if not powered up, 1 if incremented
+ * or 0 if unchanged. Only used in hdac_regmap.c
+ */
+int snd_hdac_keep_power_up(struct hdac_device *codec)
+{
+ if (!atomic_inc_not_zero(&codec->in_pm)) {
+ int ret = pm_runtime_get_if_in_use(&codec->dev);
+ if (!ret)
+ return -1;
+ if (ret < 0)
+ return 0;
+ }
+ return 1;
+}
+
/**
* snd_hdac_power_down_pm - power down the codec
* @codec: the codec object