]> git.openfabrics.org - ~shefty/rdma-dev.git/blobdiff - sound/soc/codecs/wm8994.c
ASoC: wm8994: Only enable extra BCLK cycles when required
[~shefty/rdma-dev.git] / sound / soc / codecs / wm8994.c
index 2b2dadc54dac5cfe729ddc2fd402e748195a6882..3fddc7ad1127eb9408bc6d2cddd7499e7b03ec39 100644 (file)
@@ -1045,6 +1045,7 @@ static int aif1clk_ev(struct snd_soc_dapm_widget *w,
                      struct snd_kcontrol *kcontrol, int event)
 {
        struct snd_soc_codec *codec = w->codec;
+       struct wm8994_priv *wm8994 = snd_soc_codec_get_drvdata(codec);
        struct wm8994 *control = codec->control_data;
        int mask = WM8994_AIF1DAC1L_ENA | WM8994_AIF1DAC1R_ENA;
        int i;
@@ -1063,6 +1064,10 @@ static int aif1clk_ev(struct snd_soc_dapm_widget *w,
 
        switch (event) {
        case SND_SOC_DAPM_PRE_PMU:
+               /* Don't enable timeslot 2 if not in use */
+               if (wm8994->channels[0] <= 2)
+                       mask &= ~(WM8994_AIF1DAC2L_ENA | WM8994_AIF1DAC2R_ENA);
+
                val = snd_soc_read(codec, WM8994_AIF1_CONTROL_1);
                if ((val & WM8994_AIF1ADCL_SRC) &&
                    (val & WM8994_AIF1ADCR_SRC))
@@ -2687,7 +2692,7 @@ static int wm8994_hw_params(struct snd_pcm_substream *substream,
                return -EINVAL;
        }
 
-       bclk_rate = params_rate(params) * 4;
+       bclk_rate = params_rate(params);
        switch (params_format(params)) {
        case SNDRV_PCM_FORMAT_S16_LE:
                bclk_rate *= 16;
@@ -2708,6 +2713,17 @@ static int wm8994_hw_params(struct snd_pcm_substream *substream,
                return -EINVAL;
        }
 
+       wm8994->channels[id] = params_channels(params);
+       switch (params_channels(params)) {
+       case 1:
+       case 2:
+               bclk_rate *= 2;
+               break;
+       default:
+               bclk_rate *= 4;
+               break;
+       }
+
        /* Try to find an appropriate sample rate; look for an exact match. */
        for (i = 0; i < ARRAY_SIZE(srs); i++)
                if (srs[i].rate == params_rate(params))