1 files changed, 8 insertions, 2 deletions

diff --git a/sound/soc/codecs/wm8903.c b/sound/soc/codecs/wm8903.c
index d8a9222fbf74..3ebd770463e3 100644
--- a/sound/soc/codecs/wm8903.c
+++ b/sound/soc/codecs/wm8903.c
@@ -715,8 +715,6 @@ SOC_ENUM("DAC Soft Mute Rate", soft_mute),
 SOC_ENUM("DAC Mute Mode", mute_mode),
 SOC_SINGLE("DAC Mono Switch", WM8903_DAC_DIGITAL_1, 12, 1, 0),
 SOC_ENUM("DAC De-emphasis", dac_deemphasis),
-SOC_SINGLE("DAC Sloping Stopband Filter Switch",
-           WM8903_DAC_DIGITAL_1, 11, 1, 0),
 SOC_ENUM("DAC Companding Mode", dac_companding),
 SOC_SINGLE("DAC Companding Switch", WM8903_AUDIO_INTERFACE_0, 1, 1, 0),
 
@@ -1377,12 +1375,19 @@ static int wm8903_hw_params(struct snd_pcm_substream *substream,
         u16 aif3 = wm8903_read(codec, WM8903_AUDIO_INTERFACE_3);
         u16 clock0 = wm8903_read(codec, WM8903_CLOCK_RATES_0);
         u16 clock1 = wm8903_read(codec, WM8903_CLOCK_RATES_1);
+        u16 dac_digital1 = wm8903_read(codec, WM8903_DAC_DIGITAL_1);
 
         if (substream == wm8903->slave_substream) {
                 dev_dbg(&i2c->dev, "Ignoring hw_params for slave substream\n");
                 return 0;
         }
 
+        /* Enable sloping stopband filter for low sample rates */
+        if (fs <= 24000)
+                dac_digital1 |= WM8903_DAC_SB_FILT;
+        else
+                dac_digital1 &= ~WM8903_DAC_SB_FILT;
+
         /* Configure sample rate logic for DSP - choose nearest rate */
         dsp_config = 0;
         best_val = abs(sample_rates[dsp_config].rate - fs);
@@ -1507,6 +1512,7 @@ static int wm8903_hw_params(struct snd_pcm_substream *substream,
         wm8903_write(codec, WM8903_AUDIO_INTERFACE_1, aif1);
         wm8903_write(codec, WM8903_AUDIO_INTERFACE_2, aif2);
         wm8903_write(codec, WM8903_AUDIO_INTERFACE_3, aif3);
+        wm8903_write(codec, WM8903_DAC_DIGITAL_1, dac_digital1);
 
         return 0;
 }