ASoC: wm8960: Add DAC filter characteristics selection

Support DAC filter characteristics selection: Normal mode
and Sloping stopband. Sloping stopband may have
better frequency response.

Signed-off-by: Shengjiu Wang <shengjiu.wang@nxp.com>
Acked-by: Charles Keepax <ckeepax@opensource.cirrus.com>
Link: https://lore.kernel.org/r/1689927842-21165-1-git-send-email-shengjiu.wang@nxp.com
Signed-off-by: Mark Brown <broonie@kernel.org>

diff --git a/sound/soc/codecs/wm8960.c b/sound/soc/codecs/wm8960.c
index 92fb7ab6e8966608f578a62547789e79b989bdc8..c2bd9ef41ebb2d9da8c3cb8926c5087bed0724a2 100644 (file)
--- a/sound/soc/codecs/wm8960.c
+++ b/sound/soc/codecs/wm8960.c
@@ -155,6 +155,7 @@ static const char *wm8960_adc_data_output_sel[] = {
        "Left Data = Right ADC; Right Data = Left ADC",
 };
 static const char *wm8960_dmonomix[] = {"Stereo", "Mono"};
+static const char *wm8960_dacslope[] = {"Normal", "Sloping"};
 
 static const struct soc_enum wm8960_enum[] = {
        SOC_ENUM_SINGLE(WM8960_DACCTL1, 5, 4, wm8960_polarity),
@@ -165,6 +166,7 @@ static const struct soc_enum wm8960_enum[] = {
        SOC_ENUM_SINGLE(WM8960_ALC3, 8, 2, wm8960_alcmode),
        SOC_ENUM_SINGLE(WM8960_ADDCTL1, 2, 4, wm8960_adc_data_output_sel),
        SOC_ENUM_SINGLE(WM8960_ADDCTL1, 4, 2, wm8960_dmonomix),
+       SOC_ENUM_SINGLE(WM8960_DACCTL2, 1, 2, wm8960_dacslope),
 };
 
 static const int deemph_settings[] = { 0, 32000, 44100, 48000 };
@@ -307,6 +309,7 @@ SOC_SINGLE_TLV("Right Output Mixer RINPUT3 Volume",
 
 SOC_ENUM("ADC Data Output Select", wm8960_enum[6]),
 SOC_ENUM("DAC Mono Mix", wm8960_enum[7]),
+SOC_ENUM("DAC Filter Characteristics", wm8960_enum[8]),
 };
 
 static const struct snd_kcontrol_new wm8960_lin_boost[] = {