[PATCH 06/12] ASoC: sun4i-codec: Add support for A31 Line In playback

[Chen-Yu Tsai]

The A31 integrated codec has a stereo "Line In" input. Add support for
it to the playback paths.

Signed-off-by: Chen-Yu Tsai <w...@csie.org>
---
 sound/soc/sunxi/sun4i-codec.c | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/sound/soc/sunxi/sun4i-codec.c b/sound/soc/sunxi/sun4i-codec.c
index 9916714ecb71..d9ec8215c1f9 100644
--- a/sound/soc/sunxi/sun4i-codec.c
+++ b/sound/soc/sunxi/sun4i-codec.c
@@ -747,6 +747,10 @@ static const struct snd_kcontrol_new 
sun6i_codec_mixer_controls[] = {
                        SUN6I_CODEC_OM_DACA_CTRL,
                        SUN6I_CODEC_OM_DACA_CTRL_LMIX_DACR,
                        SUN6I_CODEC_OM_DACA_CTRL_RMIX_DACL, 1, 0),
+       SOC_DAPM_DOUBLE("Line In Playback Switch",
+                       SUN6I_CODEC_OM_DACA_CTRL,
+                       SUN6I_CODEC_OM_DACA_CTRL_LMIX_LINEINL,
+                       SUN6I_CODEC_OM_DACA_CTRL_RMIX_LINEINR, 1, 0),
 };
 
 /* headphone controls */
@@ -767,6 +771,8 @@ static const struct snd_kcontrol_new sun6i_codec_hp_src[] = 
{
 /* volume / mute controls */
 static const DECLARE_TLV_DB_SCALE(sun6i_codec_dvol_scale, -7308, 116, 0);
 static const DECLARE_TLV_DB_SCALE(sun6i_codec_hp_vol_scale, -6300, 100, 1);
+static const DECLARE_TLV_DB_SCALE(sun6i_codec_out_mixer_pregain_scale,
+                                 -450, 150, 0);
 
 static const struct snd_kcontrol_new sun6i_codec_codec_widgets[] = {
        SOC_SINGLE_TLV("DAC Playback Volume", SUN4I_CODEC_DAC_DPC,
@@ -780,9 +786,16 @@ static const struct snd_kcontrol_new 
sun6i_codec_codec_widgets[] = {
                   SUN6I_CODEC_OM_DACA_CTRL,
                   SUN6I_CODEC_OM_DACA_CTRL_LHPPAMUTE,
                   SUN6I_CODEC_OM_DACA_CTRL_RHPPAMUTE, 1, 0),
+       /* Mixer pre-gains */
+       SOC_SINGLE_TLV("Line In Playback Volume",
+                      SUN6I_CODEC_OM_PA_CTRL, SUN6I_CODEC_OM_PA_CTRL_LINEING,
+                      0x7, 0, sun6i_codec_out_mixer_pregain_scale),
 };
 
 static const struct snd_soc_dapm_widget sun6i_codec_codec_dapm_widgets[] = {
+       /* Line In */
+       SND_SOC_DAPM_INPUT("LINEIN"),
+
        /* Digital parts of the DACs */
        SND_SOC_DAPM_SUPPLY("DAC Enable", SUN4I_CODEC_DAC_DPC,
                            SUN4I_CODEC_DAC_DPC_EN_DA, 0,
@@ -818,10 +831,12 @@ static const struct snd_soc_dapm_route 
sun6i_codec_codec_dapm_routes[] = {
        /* Left Mixer Routes */
        { "Left Mixer", "DAC Playback Switch", "Left DAC" },
        { "Left Mixer", "DAC Reversed Playback Switch", "Right DAC" },
+       { "Left Mixer", "Line In Playback Switch", "LINEIN" },
 
        /* Right Mixer Routes */
        { "Right Mixer", "DAC Playback Switch", "Right DAC" },
        { "Right Mixer", "DAC Reversed Playback Switch", "Left DAC" },
+       { "Right Mixer", "Line In Playback Switch", "LINEIN" },
 
        /* Headphone Routes */
        { "Headphone Source Playback Route", "DAC", "Left DAC" },
-- 
2.9.3