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authorJeeja KP <jeeja.kp@intel.com>2015-08-21 21:36:18 +0530
committerTakashi Iwai <tiwai@suse.de>2015-08-21 19:28:18 +0200
commitc5b0c09b8fa3e02d9cbfd9445fb4114becdd3390 (patch)
tree6f161a9aba40c0c2fdb0ed0a9dd5205899252535 /sound/hda
parenta7e3dd85cab1c6990cafd0bedb0b8809f15149b0 (diff)
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>
Diffstat (limited to 'sound/hda')
-rw-r--r--sound/hda/ext/hdac_ext_controller.c20
1 files changed, 20 insertions, 0 deletions
diff --git a/sound/hda/ext/hdac_ext_controller.c b/sound/hda/ext/hdac_ext_controller.c
index d3bb112754f2..63215b17247c 100644
--- a/sound/hda/ext/hdac_ext_controller.c
+++ b/sound/hda/ext/hdac_ext_controller.c
@@ -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);