diff options
| -rw-r--r-- | include/sound/soc-dapm.h | 3 | ||||
| -rw-r--r-- | sound/soc/soc-dapm.c | 35 |
2 files changed, 37 insertions, 1 deletions
diff --git a/include/sound/soc-dapm.h b/include/sound/soc-dapm.h index 5915fc059842..d5d6ba862dfe 100644 --- a/include/sound/soc-dapm.h +++ b/include/sound/soc-dapm.h @@ -339,6 +339,8 @@ int snd_soc_dapm_disable_pin(struct snd_soc_codec *codec, const char *pin); int snd_soc_dapm_nc_pin(struct snd_soc_codec *codec, const char *pin); int snd_soc_dapm_get_pin_status(struct snd_soc_codec *codec, const char *pin); int snd_soc_dapm_sync(struct snd_soc_codec *codec); +int snd_soc_dapm_force_enable_pin(struct snd_soc_codec *codec, + const char *pin); /* dapm widget types */ enum snd_soc_dapm_type { @@ -426,6 +428,7 @@ struct snd_soc_dapm_widget { unsigned char new:1; /* cnew complete */ unsigned char ext:1; /* has external widgets */ unsigned char suspend:1; /* was active before suspend */ + unsigned char force:1; /* force state */ int (*power_check)(struct snd_soc_dapm_widget *w); diff --git a/sound/soc/soc-dapm.c b/sound/soc/soc-dapm.c index 86ded22e36af..bbb2135a0b21 100644 --- a/sound/soc/soc-dapm.c +++ b/sound/soc/soc-dapm.c @@ -979,7 +979,10 @@ static int dapm_power_widgets(struct snd_soc_codec *codec, int event) break; default: - power = w->power_check(w); + if (!w->force) + power = w->power_check(w); + else + power = 1; if (power) sys_power = 1; break; @@ -2134,6 +2137,36 @@ int snd_soc_dapm_enable_pin(struct snd_soc_codec *codec, const char *pin) EXPORT_SYMBOL_GPL(snd_soc_dapm_enable_pin); /** + * snd_soc_dapm_force_enable_pin - force a pin to be enabled + * @codec: SoC codec + * @pin: pin name + * + * Enables input/output pin regardless of any other state. This is + * intended for use with microphone bias supplies used in microphone + * jack detection. + * + * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to + * do any widget power switching. + */ +int snd_soc_dapm_force_enable_pin(struct snd_soc_codec *codec, const char *pin) +{ + struct snd_soc_dapm_widget *w; + + list_for_each_entry(w, &codec->dapm_widgets, list) { + if (!strcmp(w->name, pin)) { + pr_debug("dapm: %s: pin %s\n", codec->name, pin); + w->connected = 1; + w->force = 1; + return 0; + } + } + + pr_err("dapm: %s: configuring unknown pin %s\n", codec->name, pin); + return -EINVAL; +} +EXPORT_SYMBOL_GPL(snd_soc_dapm_force_enable_pin); + +/** * snd_soc_dapm_disable_pin - disable pin. * @codec: SoC codec * @pin: pin name |