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ALSA: hdac: Add snd_hdac_ext_bus_link_power_down_all() 

New HDA controllers like Skylake sport multiple HDA links, so we need a
helper to turn off all the links in one go while suspending the device so
add snd_hdac_ext_bus_link_power_down_all() API

Signed-off-by: Jeeja KP <jeeja.kp@intel.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Jeeja KP 2015-08-21 21:36:18 +05:30 committed by Takashi Iwai
parent a7e3dd85ca
commit c5b0c09b8f
2 changed files with 21 additions and 0 deletions
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1
include/sound/hdaudio_ext.h
View File

@ -116,6 +116,7 @@ struct hdac_ext_link {
int snd_hdac_ext_bus_link_power_up(struct hdac_ext_link *link);
int snd_hdac_ext_bus_link_power_down(struct hdac_ext_link *link);
int snd_hdac_ext_bus_link_power_down_all(struct hdac_ext_bus *ebus);
void snd_hdac_ext_link_set_stream_id(struct hdac_ext_link *link,
int stream);
void snd_hdac_ext_link_clear_stream_id(struct hdac_ext_link *link,

20
sound/hda/ext/hdac_ext_controller.c
View File

@ -280,3 +280,23 @@ int snd_hdac_ext_bus_link_power_down(struct hdac_ext_link *link)
return check_hdac_link_power_active(link, false);
}
EXPORT_SYMBOL_GPL(snd_hdac_ext_bus_link_power_down);
/**
* snd_hdac_ext_bus_link_power_down_all -power down all hda link
* @ebus: HD-audio extended bus
*/
int snd_hdac_ext_bus_link_power_down_all(struct hdac_ext_bus *ebus)
{
struct hdac_ext_link *hlink = NULL;
int ret;
list_for_each_entry(hlink, &ebus->hlink_list, list) {
snd_hdac_updatel(hlink->ml_addr, AZX_REG_ML_LCTL, AZX_MLCTL_SPA, 0);
ret = check_hdac_link_power_active(hlink, false);
if (ret < 0)
return ret;
}
return 0;
}
EXPORT_SYMBOL_GPL(snd_hdac_ext_bus_link_power_down_all);