[alsa-devel] [PATCH] ALSA: hda - Disable widget power-save for VIA codecs

[Takashi Iwai]

The widget power-save that was enabled in 4.1 kernel seems resulting
in the silent output on VIA codecs by some reason.  Some widgets get
wrong power states.

As a quick fix, turn this flag off while keeping power_down_unused
flag.  This will bring back to the state of 4.0.x.

Fixes: 688b12cc3ca8 ('ALSA: hda - Use the new power control for VIA codecs')
Reported-and-tested-by: Harald Dunkel <harri at afaics.de>
Cc: <stable at vger.kernel.org> # v4.1
Signed-off-by: Takashi Iwai <tiwai at suse.de>
---
 sound/pci/hda/patch_via.c | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/sound/pci/hda/patch_via.c b/sound/pci/hda/patch_via.c
index 0521be8d46a8..da5366405eda 100644
--- a/sound/pci/hda/patch_via.c
+++ b/sound/pci/hda/patch_via.c
@@ -241,7 +241,9 @@ static int via_pin_power_ctl_get(struct snd_kcontrol *kcontrol,
 				 struct snd_ctl_elem_value *ucontrol)
 {
 	struct hda_codec *codec = snd_kcontrol_chip(kcontrol);
-	ucontrol->value.enumerated.item[0] = codec->power_save_node;
+	struct via_spec *spec = codec->spec;
+
+	ucontrol->value.enumerated.item[0] = spec->gen.power_down_unused;
 	return 0;
 }
 
@@ -252,9 +254,9 @@ static int via_pin_power_ctl_put(struct snd_kcontrol *kcontrol,
 	struct via_spec *spec = codec->spec;
 	bool val = !!ucontrol->value.enumerated.item[0];
 
-	if (val == codec->power_save_node)
+	if (val == spec->gen.power_down_unused)
 		return 0;
-	codec->power_save_node = val;
+	/* codec->power_save_node = val; */ /* widget PM seems yet broken */
 	spec->gen.power_down_unused = val;
 	analog_low_current_mode(codec);
 	return 1;
-- 
2.4.4