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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>

authored by

Shengjiu Wang and committed by
Mark Brown
8cf2e3b1 7c2a3cfc

+3
+3
sound/soc/codecs/wm8960.c
··· 155 155 "Left Data = Right ADC; Right Data = Left ADC", 156 156 }; 157 157 static const char *wm8960_dmonomix[] = {"Stereo", "Mono"}; 158 + static const char *wm8960_dacslope[] = {"Normal", "Sloping"}; 158 159 159 160 static const struct soc_enum wm8960_enum[] = { 160 161 SOC_ENUM_SINGLE(WM8960_DACCTL1, 5, 4, wm8960_polarity), ··· 166 165 SOC_ENUM_SINGLE(WM8960_ALC3, 8, 2, wm8960_alcmode), 167 166 SOC_ENUM_SINGLE(WM8960_ADDCTL1, 2, 4, wm8960_adc_data_output_sel), 168 167 SOC_ENUM_SINGLE(WM8960_ADDCTL1, 4, 2, wm8960_dmonomix), 168 + SOC_ENUM_SINGLE(WM8960_DACCTL2, 1, 2, wm8960_dacslope), 169 169 }; 170 170 171 171 static const int deemph_settings[] = { 0, 32000, 44100, 48000 }; ··· 309 307 310 308 SOC_ENUM("ADC Data Output Select", wm8960_enum[6]), 311 309 SOC_ENUM("DAC Mono Mix", wm8960_enum[7]), 310 + SOC_ENUM("DAC Filter Characteristics", wm8960_enum[8]), 312 311 }; 313 312 314 313 static const struct snd_kcontrol_new wm8960_lin_boost[] = {