1 files changed, 17 insertions, 6 deletions

diff --git a/sound/soc/codecs/wm8350.c b/sound/soc/codecs/wm8350.c
index e7348d341b76..f6bb59951f96 100644
--- a/sound/soc/codecs/wm8350.c
+++ b/sound/soc/codecs/wm8350.c
@@ -406,7 +406,6 @@ static const char *wm8350_deemp[] = { "None", "32kHz", "44.1kHz", "48kHz" };
 static const char *wm8350_pol[] = { "Normal", "Inv R", "Inv L", "Inv L & R" };
 static const char *wm8350_dacmutem[] = { "Normal", "Soft" };
 static const char *wm8350_dacmutes[] = { "Fast", "Slow" };
-static const char *wm8350_dacfilter[] = { "Normal", "Sloping" };
 static const char *wm8350_adcfilter[] = { "None", "High Pass" };
 static const char *wm8350_adchp[] = { "44.1kHz", "8kHz", "16kHz", "32kHz" };
 static const char *wm8350_lr[] = { "Left", "Right" };
@@ -416,7 +415,6 @@ static const struct soc_enum wm8350_enum[] = {
         SOC_ENUM_SINGLE(WM8350_DAC_CONTROL, 0, 4, wm8350_pol),
         SOC_ENUM_SINGLE(WM8350_DAC_MUTE_VOLUME, 14, 2, wm8350_dacmutem),
         SOC_ENUM_SINGLE(WM8350_DAC_MUTE_VOLUME, 13, 2, wm8350_dacmutes),
-        SOC_ENUM_SINGLE(WM8350_DAC_MUTE_VOLUME, 12, 2, wm8350_dacfilter),
         SOC_ENUM_SINGLE(WM8350_ADC_CONTROL, 15, 2, wm8350_adcfilter),
         SOC_ENUM_SINGLE(WM8350_ADC_CONTROL, 8, 4, wm8350_adchp),
         SOC_ENUM_SINGLE(WM8350_ADC_CONTROL, 0, 4, wm8350_pol),
@@ -444,10 +442,9 @@ static const struct snd_kcontrol_new wm8350_snd_controls[] = {
                                 0, 255, 0, dac_pcm_tlv),
         SOC_ENUM("Playback PCM Mute Function", wm8350_enum[2]),
         SOC_ENUM("Playback PCM Mute Speed", wm8350_enum[3]),
-        SOC_ENUM("Playback PCM Filter", wm8350_enum[4]),
-        SOC_ENUM("Capture PCM Filter", wm8350_enum[5]),
-        SOC_ENUM("Capture PCM HP Filter", wm8350_enum[6]),
-        SOC_ENUM("Capture ADC Inversion", wm8350_enum[7]),
+        SOC_ENUM("Capture PCM Filter", wm8350_enum[4]),
+        SOC_ENUM("Capture PCM HP Filter", wm8350_enum[5]),
+        SOC_ENUM("Capture ADC Inversion", wm8350_enum[6]),
         SOC_WM8350_DOUBLE_R_TLV("Capture PCM Volume",
                                 WM8350_ADC_DIGITAL_VOLUME_L,
                                 WM8350_ADC_DIGITAL_VOLUME_R,
@@ -993,6 +990,7 @@ static int wm8350_pcm_hw_params(struct snd_pcm_substream *substream,
                                 struct snd_soc_dai *codec_dai)
 {
         struct snd_soc_codec *codec = codec_dai->codec;
+        struct wm8350 *wm8350 = codec->control_data;
         u16 iface = wm8350_codec_read(codec, WM8350_AI_FORMATING) &
             ~WM8350_AIF_WL_MASK;
 
@@ -1012,6 +1010,19 @@ static int wm8350_pcm_hw_params(struct snd_pcm_substream *substream,
         }
 
         wm8350_codec_write(codec, WM8350_AI_FORMATING, iface);
+
+        /* The sloping stopband filter is recommended for use with
+         * lower sample rates to improve performance.
+         */
+        if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
+                if (params_rate(params) < 24000)
+                        wm8350_set_bits(wm8350, WM8350_DAC_MUTE_VOLUME,
+                                        WM8350_DAC_SB_FILT);
+                else
+                        wm8350_clear_bits(wm8350, WM8350_DAC_MUTE_VOLUME,
+                                          WM8350_DAC_SB_FILT);
+        }
+
         return 0;
 }