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-rw-r--r--include/sound/soc-dapm.h34
-rw-r--r--include/sound/soc.h40
-rw-r--r--sound/soc/soc-dapm.c35
3 files changed, 105 insertions, 4 deletions
diff --git a/include/sound/soc-dapm.h b/include/sound/soc-dapm.h
index 0bc8364..70216d2 100644
--- a/include/sound/soc-dapm.h
+++ b/include/sound/soc-dapm.h
@@ -444,6 +444,9 @@ int snd_soc_dapm_dai_get_connected_widgets(struct snd_soc_dai *dai, int stream,
struct snd_soc_dapm_context *snd_soc_dapm_kcontrol_dapm(
struct snd_kcontrol *kcontrol);
+int snd_soc_dapm_force_bias_level(struct snd_soc_dapm_context *dapm,
+ enum snd_soc_bias_level level);
+
/* dapm widget types */
enum snd_soc_dapm_type {
snd_soc_dapm_input = 0, /* input pin */
@@ -623,4 +626,35 @@ struct snd_soc_dapm_stats {
int neighbour_checks;
};
+/**
+ * snd_soc_dapm_init_bias_level() - Initialize DAPM bias level
+ * @dapm: The DAPM context to initialize
+ * @level: The DAPM level to initialize to
+ *
+ * This function only sets the driver internal state of the DAPM level and will
+ * not modify the state of the device. Hence it should not be used during normal
+ * operation, but only to synchronize the internal state to the device state.
+ * E.g. during driver probe to set the DAPM level to the one corresponding with
+ * the power-on reset state of the device.
+ *
+ * To change the DAPM state of the device use snd_soc_dapm_set_bias_level().
+ */
+static inline void snd_soc_dapm_init_bias_level(
+ struct snd_soc_dapm_context *dapm, enum snd_soc_bias_level level)
+{
+ dapm->bias_level = level;
+}
+
+/**
+ * snd_soc_dapm_get_bias_level() - Get current DAPM bias level
+ * @dapm: The context for which to get the bias level
+ *
+ * Returns: The current bias level of the passed DAPM context.
+ */
+static inline enum snd_soc_bias_level snd_soc_dapm_get_bias_level(
+ struct snd_soc_dapm_context *dapm)
+{
+ return dapm->bias_level;
+}
+
#endif
diff --git a/include/sound/soc.h b/include/sound/soc.h
index 2f74200..7781bfe 100644
--- a/include/sound/soc.h
+++ b/include/sound/soc.h
@@ -1282,6 +1282,46 @@ static inline struct snd_soc_dapm_context *snd_soc_codec_get_dapm(
}
/**
+ * snd_soc_dapm_init_bias_level() - Initialize CODEC DAPM bias level
+ * @dapm: The CODEC for which to initialize the DAPM bias level
+ * @level: The DAPM level to initialize to
+ *
+ * Initializes the CODEC DAPM bias level. See snd_soc_dapm_init_bias_level().
+ */
+static inline void snd_soc_codec_init_bias_level(struct snd_soc_codec *codec,
+ enum snd_soc_bias_level level)
+{
+ snd_soc_dapm_init_bias_level(snd_soc_codec_get_dapm(codec), level);
+}
+
+/**
+ * snd_soc_dapm_get_bias_level() - Get current CODEC DAPM bias level
+ * @codec: The CODEC for which to get the DAPM bias level
+ *
+ * Returns: The current DAPM bias level of the CODEC.
+ */
+static inline enum snd_soc_bias_level snd_soc_codec_get_bias_level(
+ struct snd_soc_codec *codec)
+{
+ return snd_soc_dapm_get_bias_level(snd_soc_codec_get_dapm(codec));
+}
+
+/**
+ * snd_soc_codec_force_bias_level() - Set the CODEC DAPM bias level
+ * @codec: The CODEC for which to set the level
+ * @level: The level to set to
+ *
+ * Forces the CODEC bias level to a specific state. See
+ * snd_soc_dapm_force_bias_level().
+ */
+static inline int snd_soc_codec_force_bias_level(struct snd_soc_codec *codec,
+ enum snd_soc_bias_level level)
+{
+ return snd_soc_dapm_force_bias_level(snd_soc_codec_get_dapm(codec),
+ level);
+}
+
+/**
* snd_soc_dapm_kcontrol_codec() - Returns the codec associated to a kcontrol
* @kcontrol: The kcontrol
*
diff --git a/sound/soc/soc-dapm.c b/sound/soc/soc-dapm.c
index defe0f0..b24782b 100644
--- a/sound/soc/soc-dapm.c
+++ b/sound/soc/soc-dapm.c
@@ -526,6 +526,35 @@ static void soc_dapm_async_complete(struct snd_soc_dapm_context *dapm)
}
/**
+ * snd_soc_dapm_force_bias_level() - Sets the DAPM bias level
+ * @dapm: The DAPM context for which to set the level
+ * @level: The level to set
+ *
+ * Forces the DAPM bias level to a specific state. It will call the bias level
+ * callback of DAPM context with the specified level. This will even happen if
+ * the context is already at the same level. Furthermore it will not go through
+ * the normal bias level sequencing, meaning any intermediate states between the
+ * current and the target state will not be entered.
+ *
+ * Note that the change in bias level is only temporary and the next time
+ * snd_soc_dapm_sync() is called the state will be set to the level as
+ * determined by the DAPM core. The function is mainly intended to be used to
+ * used during probe or resume from suspend to power up the device so
+ * initialization can be done, before the DAPM core takes over.
+ */
+int snd_soc_dapm_force_bias_level(struct snd_soc_dapm_context *dapm,
+ enum snd_soc_bias_level level)
+{
+ int ret = 0;
+
+ if (dapm->set_bias_level)
+ ret = dapm->set_bias_level(dapm, level);
+
+ return ret;
+}
+EXPORT_SYMBOL_GPL(snd_soc_dapm_force_bias_level);
+
+/**
* snd_soc_dapm_set_bias_level - set the bias level for the system
* @dapm: DAPM context
* @level: level to configure
@@ -547,10 +576,8 @@ static int snd_soc_dapm_set_bias_level(struct snd_soc_dapm_context *dapm,
if (ret != 0)
goto out;
- if (dapm->set_bias_level)
- ret = dapm->set_bias_level(dapm, level);
- else if (!card || dapm != &card->dapm)
- dapm->bias_level = level;
+ if (!card || dapm != &card->dapm)
+ ret = snd_soc_dapm_force_bias_level(dapm, level);
if (ret != 0)
goto out;
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