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-rw-r--r--sound/soc/codecs/wm8900.c13
1 files changed, 12 insertions, 1 deletions
diff --git a/sound/soc/codecs/wm8900.c b/sound/soc/codecs/wm8900.c
index 3c78945244b..de99206a010 100644
--- a/sound/soc/codecs/wm8900.c
+++ b/sound/soc/codecs/wm8900.c
@@ -116,6 +116,7 @@
#define WM8900_REG_CLOCKING2_DAC_CLKDIV 0x1c
#define WM8900_REG_DACCTRL_MUTE 0x004
+#define WM8900_REG_DACCTRL_DAC_SB_FILT 0x100
#define WM8900_REG_DACCTRL_AIF_LRCLKRATE 0x400
#define WM8900_REG_AUDIO3_ADCLRC_DIR 0x0800
@@ -439,7 +440,6 @@ SOC_SINGLE("DAC Soft Mute Switch", WM8900_REG_DACCTRL, 6, 1, 1),
SOC_ENUM("DAC Mute Rate", dac_mute_rate),
SOC_SINGLE("DAC Mono Switch", WM8900_REG_DACCTRL, 9, 1, 0),
SOC_ENUM("DAC Deemphasis", dac_deemphasis),
-SOC_SINGLE("DAC Sloping Stopband Filter Switch", WM8900_REG_DACCTRL, 8, 1, 0),
SOC_SINGLE("DAC Sigma-Delta Modulator Clock Switch", WM8900_REG_DACCTRL,
12, 1, 0),
@@ -743,6 +743,17 @@ static int wm8900_hw_params(struct snd_pcm_substream *substream,
wm8900_write(codec, WM8900_REG_AUDIO1, reg);
+ if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
+ reg = wm8900_read(codec, WM8900_REG_DACCTRL);
+
+ if (params_rate(params) <= 24000)
+ reg |= WM8900_REG_DACCTRL_DAC_SB_FILT;
+ else
+ reg &= ~WM8900_REG_DACCTRL_DAC_SB_FILT;
+
+ wm8900_write(codec, WM8900_REG_DACCTRL, reg);
+ }
+
return 0;
}