ASoC: omap: rx51: Add stereo output support to audio jack

Audio jack in Nokia RX-51/N900 is driven by TPA6130 headphone amplifier.
This patch adds support for it and stereo output can be active when
"Jack Function" == "TV-OUT" || "Headphone".

As the TPA6130 can output very high volume levels the output is limited
with snd_soc_limit_volume. Limiting value is found from Maemo kernel sources.

Signed-off-by: Jarkko Nikula <jhnikula@gmail.com>
Cc: Peter Ujfalusi <peter.ujfalusi@nokia.com>
Acked-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: Liam Girdwood <lrg@slimlogic.co.uk>

2 files changed, 40 insertions, 4 deletions

diff --git a/sound/soc/omap/Kconfig b/sound/soc/omap/Kconfig
index a088db6d5091..b5922984eac6 100644
--- a/sound/soc/omap/Kconfig
+++ b/sound/soc/omap/Kconfig
@@ -24,6 +24,7 @@ config SND_OMAP_SOC_RX51
         select OMAP_MCBSP
         select SND_OMAP_SOC_MCBSP
         select SND_SOC_TLV320AIC3X
+        select SND_SOC_TPA6130A2
         help
           Say Y if you want to add support for SoC audio on Nokia RX-51
           hardware. This is also known as Nokia N900 product.
diff --git a/sound/soc/omap/rx51.c b/sound/soc/omap/rx51.c
index 09fb0df8d416..251afbe303c6 100644
--- a/sound/soc/omap/rx51.c
+++ b/sound/soc/omap/rx51.c
@@ -31,6 +31,7 @@
 #include <sound/pcm.h>
 #include <sound/soc.h>
 #include <plat/mcbsp.h>
+#include "../codecs/tpa6130a2.h"
 
 #include <asm/mach-types.h>
 
@@ -47,7 +48,8 @@
 
 enum {
         RX51_JACK_DISABLED,
-        RX51_JACK_TVOUT,                /* tv-out */
+        RX51_JACK_TVOUT,                /* tv-out with stereo output */
+        RX51_JACK_HP,                   /* headphone: stereo output, no mic */
 };
 
 static int rx51_spk_func;
@@ -57,6 +59,15 @@ static int rx51_jack_func;
 static void rx51_ext_control(struct snd_soc_codec *codec)
 {
         struct snd_soc_dapm_context *dapm = &codec->dapm;
+        int hp = 0, tvout = 0;
+
+        switch (rx51_jack_func) {
+        case RX51_JACK_TVOUT:
+                tvout = 1;
+        case RX51_JACK_HP:
+                hp = 1;
+                break;
+        }
 
         if (rx51_spk_func)
                 snd_soc_dapm_enable_pin(dapm, "Ext Spk");
@@ -66,9 +77,12 @@ static void rx51_ext_control(struct snd_soc_codec *codec)
                 snd_soc_dapm_enable_pin(dapm, "DMic");
         else
                 snd_soc_dapm_disable_pin(dapm, "DMic");
+        if (hp)
+                snd_soc_dapm_enable_pin(dapm, "Headphone Jack");
+        else
+                snd_soc_dapm_disable_pin(dapm, "Headphone Jack");
 
-        gpio_set_value(RX51_TVOUT_SEL_GPIO,
-                       rx51_jack_func == RX51_JACK_TVOUT);
+        gpio_set_value(RX51_TVOUT_SEL_GPIO, tvout);
 
         snd_soc_dapm_sync(dapm);
 }
@@ -153,6 +167,19 @@ static int rx51_spk_event(struct snd_soc_dapm_widget *w,
         return 0;
 }
 
+static int rx51_hp_event(struct snd_soc_dapm_widget *w,
+                         struct snd_kcontrol *k, int event)
+{
+        struct snd_soc_codec *codec = w->dapm->codec;
+
+        if (SND_SOC_DAPM_EVENT_ON(event))
+                tpa6130a2_stereo_enable(codec, 1);
+        else
+                tpa6130a2_stereo_enable(codec, 0);
+
+        return 0;
+}
+
 static int rx51_get_input(struct snd_kcontrol *kcontrol,
                           struct snd_ctl_elem_value *ucontrol)
 {
@@ -212,11 +239,14 @@ static struct snd_soc_jack_gpio rx51_av_jack_gpios[] = {
 static const struct snd_soc_dapm_widget aic34_dapm_widgets[] = {
         SND_SOC_DAPM_SPK("Ext Spk", rx51_spk_event),
         SND_SOC_DAPM_MIC("DMic", NULL),
+        SND_SOC_DAPM_HP("Headphone Jack", rx51_hp_event),
 };
 
 static const struct snd_soc_dapm_route audio_map[] = {
         {"Ext Spk", NULL, "HPLOUT"},
         {"Ext Spk", NULL, "HPROUT"},
+        {"Headphone Jack", NULL, "LLOUT"},
+        {"Headphone Jack", NULL, "RLOUT"},
 
         {"DMic Rate 64", NULL, "Mic Bias 2V"},
         {"Mic Bias 2V", NULL, "DMic"},
@@ -224,7 +254,7 @@ static const struct snd_soc_dapm_route audio_map[] = {
 
 static const char *spk_function[] = {"Off", "On"};
 static const char *input_function[] = {"ADC", "Digital Mic"};
-static const char *jack_function[] = {"Off", "TV-OUT"};
+static const char *jack_function[] = {"Off", "TV-OUT", "Headphone"};
 
 static const struct soc_enum rx51_enum[] = {
         SOC_ENUM_SINGLE_EXT(ARRAY_SIZE(spk_function), spk_function),
@@ -265,6 +295,11 @@ static int rx51_aic34_init(struct snd_soc_pcm_runtime *rtd)
         /* Set up RX-51 specific audio path audio_map */
         snd_soc_dapm_add_routes(dapm, audio_map, ARRAY_SIZE(audio_map));
 
+        err = tpa6130a2_add_controls(codec);
+        if (err < 0)
+                return err;
+        snd_soc_limit_volume(codec, "TPA6130A2 Headphone Playback Volume", 42);
+
         snd_soc_dapm_sync(dapm);
 
         /* AV jack detection */