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>
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@ -116,6 +116,7 @@ struct hdac_ext_link {
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int snd_hdac_ext_bus_link_power_up(struct hdac_ext_link *link);
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int snd_hdac_ext_bus_link_power_down(struct hdac_ext_link *link);
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int snd_hdac_ext_bus_link_power_down_all(struct hdac_ext_bus *ebus);
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void snd_hdac_ext_link_set_stream_id(struct hdac_ext_link *link,
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int stream);
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void snd_hdac_ext_link_clear_stream_id(struct hdac_ext_link *link,
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@ -280,3 +280,23 @@ int snd_hdac_ext_bus_link_power_down(struct hdac_ext_link *link)
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return check_hdac_link_power_active(link, false);
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}
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EXPORT_SYMBOL_GPL(snd_hdac_ext_bus_link_power_down);
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/**
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* snd_hdac_ext_bus_link_power_down_all -power down all hda link
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* @ebus: HD-audio extended bus
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*/
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int snd_hdac_ext_bus_link_power_down_all(struct hdac_ext_bus *ebus)
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{
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struct hdac_ext_link *hlink = NULL;
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int ret;
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list_for_each_entry(hlink, &ebus->hlink_list, list) {
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snd_hdac_updatel(hlink->ml_addr, AZX_REG_ML_LCTL, AZX_MLCTL_SPA, 0);
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ret = check_hdac_link_power_active(hlink, false);
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if (ret < 0)
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return ret;
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}
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return 0;
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}
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EXPORT_SYMBOL_GPL(snd_hdac_ext_bus_link_power_down_all);
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