ALSA: hda - Check the activity of the NID to be powered down

When an inactive path is powered down with spec->power_down_unused
flag, we should check the activity of each widget in the path whether
it's still referred from any active path.

Signed-off-by: Takashi Iwai <tiwai@suse.de>

1 files changed, 7 insertions, 2 deletions

diff --git a/sound/pci/hda/hda_generic.c b/sound/pci/hda/hda_generic.c
index ac079f93c535..ae85bbd2e6f8 100644
--- a/sound/pci/hda/hda_generic.c
+++ b/sound/pci/hda/hda_generic.c
@@ -606,6 +606,10 @@ static bool is_active_nid(struct hda_codec *codec, hda_nid_t nid,
         return false;
 }
 
+/* check whether the NID is referred by any active paths */
+#define is_active_nid_for_any(codec, nid) \
+        is_active_nid(codec, nid, HDA_OUTPUT, 0)
+
 /* get the default amp value for the target state */
 static int get_amp_val_to_activate(struct hda_codec *codec, hda_nid_t nid,
                                    int dir, unsigned int caps, bool enable)
@@ -759,7 +763,8 @@ static void path_power_down_sync(struct hda_codec *codec, struct nid_path *path)
 
         for (i = 0; i < path->depth; i++) {
                 hda_nid_t nid = path->path[i];
-                if (!snd_hda_check_power_state(codec, nid, AC_PWRST_D3)) {
+                if (!snd_hda_check_power_state(codec, nid, AC_PWRST_D3) &&
+                    !is_active_nid_for_any(codec, nid)) {
                         snd_hda_codec_write(codec, nid, 0,
                                             AC_VERB_SET_POWER_STATE,
                                             AC_PWRST_D3);
@@ -4157,7 +4162,7 @@ static unsigned int snd_hda_gen_path_power_filter(struct hda_codec *codec,
                 return power_state;
         if (get_wcaps_type(get_wcaps(codec, nid)) >= AC_WID_POWER)
                 return power_state;
-        if (is_active_nid(codec, nid, HDA_OUTPUT, 0))
+        if (is_active_nid_for_any(codec, nid))
                 return power_state;
         return AC_PWRST_D3;
 }