[alsa-devel] [PATCH v3 3/8] ASoC: da7210: Add support for line out and DAC

[Ashish Chavan]

DA7210 has three line outputs. OUT1 Left, OUT1 Right and OUT2 (mono).
This patch adds support for gain controls for these three line outs.
It also adds support for overall DAC gain control.

Signed-off-by: Ashish Chavan <ashish.chavan at kpitcummins.com>
Signed-off-by: David Dajun Chen <dchen at diasemi.com>
---
Changes since v1:
- Removed explicit setting of default gains
- Renamed "DAC Playback" to "Digital Playback"
---
 sound/soc/codecs/da7210.c |   43 +++++++++++++++++++++++++++++++++++++++++++
 1 files changed, 43 insertions(+), 0 deletions(-)

diff --git a/sound/soc/codecs/da7210.c b/sound/soc/codecs/da7210.c
index b6e5085..a7ea07d 100644
--- a/sound/soc/codecs/da7210.c
+++ b/sound/soc/codecs/da7210.c
@@ -42,6 +42,8 @@
 #define DA7210_DAC_SEL			0x17
 #define DA7210_OUTMIX_L			0x1C
 #define DA7210_OUTMIX_R			0x1D
+#define DA7210_OUT1_L			0x1E
+#define DA7210_OUT1_R			0x1F
 #define DA7210_OUT2			0x20
 #define DA7210_HP_L_VOL			0x21
 #define DA7210_HP_R_VOL			0x22
@@ -141,6 +143,17 @@
 #define DA7210_PLL_FS_96000		(0xF << 0)
 #define DA7210_PLL_EN			(0x1 << 7)
 
+/* OUT1_L bit fields */
+#define DA7210_OUT1_L_EN		(1 << 7)
+
+/* OUT1_R bit fields */
+#define DA7210_OUT1_R_EN		(1 << 7)
+
+/* OUT2 bit fields */
+#define DA7210_OUT2_OUTMIX_R		(1 << 5)
+#define DA7210_OUT2_OUTMIX_L		(1 << 6)
+#define DA7210_OUT2_EN			(1 << 7)
+
 #define DA7210_VERSION "0.0.1"
 
 /*
@@ -161,11 +174,35 @@ static const unsigned int hp_out_tlv[] = {
 	0x11, 0x3f, TLV_DB_SCALE_ITEM(-5400, 150, 0),
 };
 
+static const DECLARE_TLV_DB_SCALE(dac_gain_tlv, -7725, 75, 0);
+
+static const unsigned int lineout_vol_tlv[] = {
+	TLV_DB_RANGE_HEAD(2),
+	0x0, 0x10, TLV_DB_SCALE_ITEM(TLV_DB_GAIN_MUTE, 0, 1),
+	/* -54dB to 15dB */
+	0x11, 0x3f, TLV_DB_SCALE_ITEM(-5400, 150, 0)
+};
+
+static const unsigned int mono_vol_tlv[] = {
+	TLV_DB_RANGE_HEAD(2),
+	0x0, 0x2, TLV_DB_SCALE_ITEM(-1800, 0, 1),
+	/* -18dB to 6dB */
+	0x3, 0x7, TLV_DB_SCALE_ITEM(-1800, 600, 0)
+};
+
 static const struct snd_kcontrol_new da7210_snd_controls[] = {
 
 	SOC_DOUBLE_R_TLV("HeadPhone Playback Volume",
 			 DA7210_HP_L_VOL, DA7210_HP_R_VOL,
 			 0, 0x3F, 0, hp_out_tlv),
+	SOC_DOUBLE_R_TLV("Digital Playback Volume",
+			 DA7210_DAC_L, DA7210_DAC_R,
+			 0, 0x77, 1, dac_gain_tlv),
+	SOC_DOUBLE_R_TLV("Lineout Playback Volume",
+			 DA7210_OUT1_L, DA7210_OUT1_R,
+			 0, 0x3f, 0, lineout_vol_tlv),
+	SOC_SINGLE_TLV("Mono Playback Volume", DA7210_OUT2, 0, 0x7, 0,
+		       mono_vol_tlv),
 };
 
 /*
@@ -659,6 +696,12 @@ static int da7210_probe(struct snd_soc_codec *codec)
 		     DA7210_HP_2CAP_MODE | DA7210_HP_SENSE_EN |
 		     DA7210_HP_L_EN | DA7210_HP_MODE | DA7210_HP_R_EN);
 
+	/* Enable Line out amplifiers */
+	snd_soc_write(codec, DA7210_OUT1_L, DA7210_OUT1_L_EN);
+	snd_soc_write(codec, DA7210_OUT1_R, DA7210_OUT1_R_EN);
+	snd_soc_write(codec, DA7210_OUT2, DA7210_OUT2_EN |
+		     DA7210_OUT2_OUTMIX_L | DA7210_OUT2_OUTMIX_R);
+
 	/* Diable PLL and bypass it */
 	snd_soc_write(codec, DA7210_PLL, DA7210_PLL_FS_48000);
 
-- 
1.7.1