diff options
| -rw-r--r-- | include/sound/hdaudio.h | 4 | ||||
| -rw-r--r-- | sound/hda/hdac_device.c | 15 | ||||
| -rw-r--r-- | sound/pci/hda/hda_codec.c | 4 |
3 files changed, 23 insertions, 0 deletions
diff --git a/include/sound/hdaudio.h b/include/sound/hdaudio.h index 6a2e030..b97c59e 100644 --- a/include/sound/hdaudio.h +++ b/include/sound/hdaudio.h @@ -74,6 +74,7 @@ struct hdac_device { /* misc flags */ atomic_t in_pm; /* suspend/resume being performed */ + bool link_power_control:1; /* sysfs */ struct hdac_widget_tree *widgets; @@ -184,6 +185,8 @@ struct hdac_bus_ops { /* get a response from the last command */ int (*get_response)(struct hdac_bus *bus, unsigned int addr, unsigned int *res); + /* control the link power */ + int (*link_power)(struct hdac_bus *bus, bool enable); }; /* @@ -311,6 +314,7 @@ static inline void snd_hdac_codec_link_down(struct hdac_device *codec) int snd_hdac_bus_send_cmd(struct hdac_bus *bus, unsigned int val); int snd_hdac_bus_get_response(struct hdac_bus *bus, unsigned int addr, unsigned int *res); +int snd_hdac_link_power(struct hdac_device *codec, bool enable); bool snd_hdac_bus_init_chip(struct hdac_bus *bus, bool full_reset); void snd_hdac_bus_stop_chip(struct hdac_bus *bus); diff --git a/sound/hda/hdac_device.c b/sound/hda/hdac_device.c index 55c7d08..cdee710 100644 --- a/sound/hda/hdac_device.c +++ b/sound/hda/hdac_device.c @@ -552,6 +552,21 @@ void snd_hdac_power_down_pm(struct hdac_device *codec) EXPORT_SYMBOL_GPL(snd_hdac_power_down_pm); #endif +/* + * Enable/disable the link power for a codec. + */ +int snd_hdac_link_power(struct hdac_device *codec, bool enable) +{ + if (!codec->link_power_control) + return 0; + + if (codec->bus->ops->link_power) + return codec->bus->ops->link_power(codec->bus, enable); + else + return -EINVAL; +} +EXPORT_SYMBOL_GPL(snd_hdac_link_power); + /* codec vendor labels */ struct hda_vendor_id { unsigned int id; diff --git a/sound/pci/hda/hda_codec.c b/sound/pci/hda/hda_codec.c index 2d8883f..a85242f 100644 --- a/sound/pci/hda/hda_codec.c +++ b/sound/pci/hda/hda_codec.c @@ -857,6 +857,7 @@ void snd_hda_codec_register(struct hda_codec *codec) return; if (device_is_registered(hda_codec_dev(codec))) { snd_hda_register_beep_device(codec); + snd_hdac_link_power(&codec->core, true); pm_runtime_enable(hda_codec_dev(codec)); /* it was powered up in snd_hda_codec_new(), now all done */ snd_hda_power_down(codec); @@ -883,6 +884,7 @@ static int snd_hda_codec_dev_free(struct snd_device *device) struct hda_codec *codec = device->device_data; codec->in_freeing = 1; + snd_hdac_link_power(&codec->core, false); snd_hdac_device_unregister(&codec->core); put_device(hda_codec_dev(codec)); return 0; @@ -3102,6 +3104,7 @@ static int hda_codec_runtime_suspend(struct device *dev) if (codec_has_clkstop(codec) && codec_has_epss(codec) && (state & AC_PWRST_CLK_STOP_OK)) snd_hdac_codec_link_down(&codec->core); + snd_hdac_link_power(&codec->core, false); return 0; } @@ -3109,6 +3112,7 @@ static int hda_codec_runtime_resume(struct device *dev) { struct hda_codec *codec = dev_to_hda_codec(dev); + snd_hdac_link_power(&codec->core, true); snd_hdac_codec_link_up(&codec->core); hda_call_codec_resume(codec); pm_runtime_mark_last_busy(dev); |
