diff options
Diffstat (limited to 'sound/soc')
| -rw-r--r-- | sound/soc/soc-dapm.c | 35 |
1 files changed, 31 insertions, 4 deletions
diff --git a/sound/soc/soc-dapm.c b/sound/soc/soc-dapm.c index defe0f0082b5..b24782b50809 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; |