[alsa-devel] [PATCH 4/5] HDA: make volume knob, the master volume for sigmatel codecs that support it

[Maxim Levitsky]

From 2b72257ec523662a580d8a6d93af72987c2855a5 Mon Sep 17 00:00:00 2001
From: Maxim Levitsky <maximlevitsky at gmail.com>
Date: Tue, 28 Aug 2007 01:22:54 +0300
Subject: [PATCH] HDA: make volume knob, the master volume for sigmatel codecs that support it

---
 sound/pci/hda/patch_sigmatel.c |   45 ++++++++++++++++++++++++++++++++++++++++
 1 files changed, 45 insertions(+), 0 deletions(-)

diff --git a/sound/pci/hda/patch_sigmatel.c b/sound/pci/hda/patch_sigmatel.c
index a1f55d1..ca21521 100644
--- a/sound/pci/hda/patch_sigmatel.c
+++ b/sound/pci/hda/patch_sigmatel.c
@@ -321,6 +321,36 @@ static int stac92xx_aloopback_put(struct snd_kcontrol *kcontrol,
 	return 1;
 }
 
+static int stac92xx_volknob_info(struct snd_kcontrol *kcontrol,
+	struct snd_ctl_elem_info *uinfo)
+{
+	uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
+	uinfo->count = 1;
+	uinfo->value.integer.min = 0;
+	uinfo->value.integer.max = 127;
+	return 0;
+}
+
+static int stac92xx_volknob_get(struct snd_kcontrol *kcontrol,
+	struct snd_ctl_elem_value *ucontrol)
+{
+	ucontrol->value.integer.value[0] = kcontrol->private_value;
+	return 0;
+}
+
+static int stac92xx_volknob_put(struct snd_kcontrol *kcontrol,
+		struct snd_ctl_elem_value *ucontrol)
+{
+	struct hda_codec *codec = snd_kcontrol_chip(kcontrol);
+
+	kcontrol->private_value = ucontrol->value.integer.value[0];
+
+	snd_hda_codec_write(codec, 0x24, 0,
+		AC_VERB_SET_VOLUME_KNOB_CONTROL,
+			kcontrol->private_value | 0x80);
+	return 1;
+}
+
 
 static struct hda_verb stac9200_core_init[] = {
 	/* set dac0mux for dac converter */
@@ -383,6 +413,17 @@ static struct hda_verb stac9205_core_init[] = {
 		.private_value = verb_read | (verb_write << 16), \
 	}
 
+#define STAC_VOLKNOB \
+	{ \
+		.iface = SNDRV_CTL_ELEM_IFACE_MIXER, \
+		.name  = "Master Playback Volume", \
+		.count = 1, \
+		.info  = stac92xx_volknob_info, \
+		.get   = stac92xx_volknob_get, \
+		.put   = stac92xx_volknob_put, \
+		.private_value = 127, \
+	}
+
 
 static struct snd_kcontrol_new stac9200_mixer[] = {
 	HDA_CODEC_VOLUME("Master Playback Volume", 0xb, 0, HDA_OUTPUT),
@@ -405,6 +446,7 @@ static struct snd_kcontrol_new stac925x_mixer[] = {
 /* This needs to be generated dynamically based on sequence */
 static struct snd_kcontrol_new stac922x_mixer[] = {
 	STAC_INPUT_SOURCE,
+	STAC_VOLKNOB,
 	HDA_CODEC_VOLUME("Capture Volume", 0x17, 0x0, HDA_INPUT),
 	HDA_CODEC_MUTE("Capture Switch", 0x17, 0x0, HDA_INPUT),
 	HDA_CODEC_VOLUME("Mux Capture Volume", 0x12, 0x0, HDA_OUTPUT),
@@ -414,6 +456,7 @@ static struct snd_kcontrol_new stac922x_mixer[] = {
 /* This needs to be generated dynamically based on sequence */
 static struct snd_kcontrol_new stac9227_mixer[] = {
 	STAC_INPUT_SOURCE,
+	STAC_VOLKNOB,
 	STAC_ANALOG_LOOPBACK(0xFEB, 0x7EB),
 	HDA_CODEC_VOLUME("Capture Volume", 0x15, 0x0, HDA_OUTPUT),
 	HDA_CODEC_MUTE("Capture Switch", 0x1b, 0x0, HDA_OUTPUT),
@@ -422,6 +465,7 @@ static struct snd_kcontrol_new stac9227_mixer[] = {
 
 static struct snd_kcontrol_new stac927x_mixer[] = {
 	STAC_INPUT_SOURCE,
+	STAC_VOLKNOB,
 	STAC_ANALOG_LOOPBACK(0xFEB, 0x7EB),
 	HDA_CODEC_VOLUME("InMux Capture Volume", 0x15, 0x0, HDA_OUTPUT),
 	HDA_CODEC_VOLUME("InVol Capture Volume", 0x18, 0x0, HDA_INPUT),
@@ -440,6 +484,7 @@ static struct snd_kcontrol_new stac9205_mixer[] = {
 	},
 	STAC_INPUT_SOURCE,
 	STAC_ANALOG_LOOPBACK(0xFE0, 0x7E0),
+	STAC_VOLKNOB,
 	HDA_CODEC_VOLUME("InMux Capture Volume", 0x19, 0x0, HDA_OUTPUT),
 	HDA_CODEC_VOLUME("InVol Capture Volume", 0x1b, 0x0, HDA_INPUT),
 	HDA_CODEC_MUTE("ADCMux Capture Switch", 0x1d, 0x0, HDA_OUTPUT),
-- 
1.5.2.3