diff options
Diffstat (limited to 'sound')
| -rw-r--r-- | sound/hda/hdac_device.c | 30 |
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 */ |