Re: [alsa-devel][PATCH] ASoC: wm8960: add two kcontrols to select ADC left/right channel source

From: Lars-Peter Clausen
Date: Mon Jun 15 2015 - 07:17:38 EST


On 06/15/2015 12:34 PM, Zidan Wang wrote:
Add two kcontrols to select ADC left/right channel source, one to select
the left channel source and one for the right channel source.

Signed-off-by: Zidan Wang <zidan.wang@xxxxxxxxxxxxx>
---
sound/soc/codecs/wm8960.c | 7 +++++++
1 file changed, 7 insertions(+)

diff --git a/sound/soc/codecs/wm8960.c b/sound/soc/codecs/wm8960.c
index 023e898..8f9aed1 100644
--- a/sound/soc/codecs/wm8960.c
+++ b/sound/soc/codecs/wm8960.c
@@ -141,6 +141,8 @@ static const char *wm8960_3d_upper_cutoff[] = {"High", "Low"};
static const char *wm8960_3d_lower_cutoff[] = {"Low", "High"};
static const char *wm8960_alcfunc[] = {"Off", "Right", "Left", "Stereo"};
static const char *wm8960_alcmode[] = {"ALC", "Limiter"};
+static const char *wm8960_adc_left_source[] = {"left ADC", "right ADC"};
+static const char *wm8960_adc_right_source[] = {"right ADC", "left ADC"};

Left and Right with a uppercase first letter.


static const struct soc_enum wm8960_enum[] = {
SOC_ENUM_SINGLE(WM8960_DACCTL1, 5, 4, wm8960_polarity),
@@ -149,6 +151,8 @@ static const struct soc_enum wm8960_enum[] = {
SOC_ENUM_SINGLE(WM8960_3D, 5, 2, wm8960_3d_lower_cutoff),
SOC_ENUM_SINGLE(WM8960_ALC1, 7, 4, wm8960_alcfunc),
SOC_ENUM_SINGLE(WM8960_ALC3, 8, 2, wm8960_alcmode),
+ SOC_ENUM_SINGLE(WM8960_ADDCTL1, 3, 2, wm8960_adc_left_source),
+ SOC_ENUM_SINGLE(WM8960_ADDCTL1, 2, 2, wm8960_adc_right_source),
};

Preferably use a separate variable for each of the enums, keeping track of which array index belongs to which enums is quite cumbersome. E.g.

static SOC_ENUM_SINGLE_DECL(wm8960_adc_left_enum, WM8960_ADDCTL1, ...);


static const int deemph_settings[] = { 0, 32000, 44100, 48000 };
@@ -279,6 +283,9 @@ SOC_SINGLE_TLV("Right Output Mixer Boost Bypass Volume",
WM8960_BYPASS2, 4, 7, 1, bypass_tlv),
SOC_SINGLE_TLV("Right Output Mixer RINPUT3 Volume",
WM8960_ROUTMIX, 4, 7, 1, bypass_tlv),
+
+SOC_ENUM("ADC Left Channel Source", wm8960_enum[6]),
+SOC_ENUM("ADC Right Channel Source", wm8960_enum[7]),

Since this affects the routing these should be DAPM controls. Otherwise you might run into issues with a path being powered down even if it is used.

};

static const struct snd_kcontrol_new wm8960_lin_boost[] = {


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