[alsa-devel] [PATCH 1/2] ALSA: hda - Fix phantom jacks on VT1708

[David Henningsson]

The VT1708 has no unsol event capability, and polling is set using
the "Jack Detect" alsamixer control. In order not to create
phantom Jack controls, temporary enable jackpoll during build_controls.

Signed-off-by: David Henningsson <david.henningsson at canonical.com>
---
 sound/pci/hda/patch_via.c |   12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/sound/pci/hda/patch_via.c b/sound/pci/hda/patch_via.c
index 9641c0e..d46c448 100644
--- a/sound/pci/hda/patch_via.c
+++ b/sound/pci/hda/patch_via.c
@@ -661,6 +661,17 @@ static int via_init(struct hda_codec *codec)
 	return 0;
 }
 
+static int vt1708_build_controls(struct hda_codec *codec)
+{
+	/* In order not to create "Phantom Jack" controls,
+	   temporary enable jackpoll */
+	int old_interval = codec->jackpoll_interval;
+	codec->jackpoll_interval = msecs_to_jiffies(100);
+	err = via_build_controls(codec);
+	codec->jackpoll_interval = old_interval;
+	return err;
+}
+
 static int vt1708_build_pcms(struct hda_codec *codec)
 {
 	struct via_spec *spec = codec->spec;
@@ -723,6 +734,7 @@ static int patch_vt1708(struct hda_codec *codec)
 	spec->init_verbs[spec->num_iverbs++] = vt1708_init_verbs;
 
 	codec->patch_ops = via_patch_ops;
+	codec->patch_ops.build_controls = vt1708_build_controls;
 	codec->patch_ops.build_pcms = vt1708_build_pcms;
 
 	/* clear jackpoll_interval again; it's set dynamically */
-- 
1.7.9.5