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

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

[Zidan Wang]

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@freescale.com>
---
 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"};
 
 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),
 };
 
 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]),
 };
 
 static const struct snd_kcontrol_new wm8960_lin_boost[] = {
-- 
1.9.1

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

[Lars-Peter Clausen]

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@freescale.com>
> ---
>   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[] = {
>

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

[Charles Keepax]

On Mon, Jun 15, 2015 at 01:17:24PM +0200, Lars-Peter Clausen wrote:
> 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@freescale.com>
>> ---
<snip>
>>   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.

I think the naming of these controls needs work.

This presently doesn't actually affect DAPM. You are changing
whether the output of the left ADC will be treated as the left or
right channel on the AIF, but in both cases the AIF and Left ADC
will be powered up.

This might change if the driver was changed to the newer style
AIF hookup, although I haven't looked in detail to see if it
would make sense to use a single widget for the AIF or one for
each channel as per the Arizona devices.

Thanks,
Charles