ASoC: Intel: Add DMIC channel constraint for bxt machine

Add channel and rate constraints for Refcap and dmiccap devices
respectively.

Signed-off-by: Yong Zhi <yong.zhi@intel.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

diff --git a/sound/soc/intel/boards/bxt_da7219_max98357a.c b/sound/soc/intel/boards/bxt_da7219_max98357a.c
index 3774b11..bb4533c 100644 (file)
--- a/sound/soc/intel/boards/bxt_da7219_max98357a.c
+++ b/sound/soc/intel/boards/bxt_da7219_max98357a.c
@@ -37,6 +37,7 @@ enum {
        BXT_DPCM_AUDIO_PB = 0,
        BXT_DPCM_AUDIO_CP,
        BXT_DPCM_AUDIO_REF_CP,
+       BXT_DPCM_AUDIO_DMIC_CP,
        BXT_DPCM_AUDIO_HDMI1_PB,
        BXT_DPCM_AUDIO_HDMI2_PB,
        BXT_DPCM_AUDIO_HDMI3_PB,
@@ -252,6 +253,52 @@ static struct snd_soc_ops broxton_da7219_ops = {
        .hw_free = broxton_da7219_hw_free,
 };
 
+static int broxton_dmic_fixup(struct snd_soc_pcm_runtime *rtd,
+                       struct snd_pcm_hw_params *params)
+{
+       struct snd_interval *channels = hw_param_interval(params,
+                                               SNDRV_PCM_HW_PARAM_CHANNELS);
+       channels->min = channels->max = DUAL_CHANNEL;
+
+       return 0;
+}
+
+static int broxton_dmic_startup(struct snd_pcm_substream *substream)
+{
+       struct snd_pcm_runtime *runtime = substream->runtime;
+
+       runtime->hw.channels_max = DUAL_CHANNEL;
+       snd_pcm_hw_constraint_list(runtime, 0, SNDRV_PCM_HW_PARAM_CHANNELS,
+                       &constraints_channels);
+
+       return snd_pcm_hw_constraint_list(substream->runtime, 0,
+                       SNDRV_PCM_HW_PARAM_RATE, &constraints_rates);
+}
+
+static const struct snd_soc_ops broxton_dmic_ops = {
+       .startup = broxton_dmic_startup,
+};
+
+static const unsigned int rates_16000[] = {
+       16000,
+};
+
+static const struct snd_pcm_hw_constraint_list constraints_16000 = {
+       .count = ARRAY_SIZE(rates_16000),
+       .list  = rates_16000,
+};
+
+static int broxton_refcap_startup(struct snd_pcm_substream *substream)
+{
+       return snd_pcm_hw_constraint_list(substream->runtime, 0,
+                       SNDRV_PCM_HW_PARAM_RATE,
+                       &constraints_16000);
+};
+
+static struct snd_soc_ops broxton_refcap_ops = {
+       .startup = broxton_refcap_startup,
+};
+
 /* broxton digital audio interface glue - connects codec <--> CPU */
 static struct snd_soc_dai_link broxton_dais[] = {
        /* Front End DAI links */
@@ -299,6 +346,21 @@ static struct snd_soc_dai_link broxton_dais[] = {
                .ignore_suspend = 1,
                .nonatomic = 1,
                .dynamic = 1,
+               .ops = &broxton_refcap_ops,
+       },
+       [BXT_DPCM_AUDIO_DMIC_CP]
+       {
+               .name = "Bxt Audio DMIC cap",
+               .stream_name = "dmiccap",
+               .cpu_dai_name = "DMIC Pin",
+               .codec_name = "snd-soc-dummy",
+               .codec_dai_name = "snd-soc-dummy-dai",
+               .platform_name = "0000:00:0e.0",
+               .init = NULL,
+               .dpcm_capture = 1,
+               .nonatomic = 1,
+               .dynamic = 1,
+               .ops = &broxton_dmic_ops,
        },
        [BXT_DPCM_AUDIO_HDMI1_PB]
        {
@@ -382,6 +444,7 @@ static struct snd_soc_dai_link broxton_dais[] = {
                .codec_dai_name = "dmic-hifi",
                .platform_name = "0000:00:0e.0",
                .ignore_suspend = 1,
+               .be_hw_params_fixup = broxton_dmic_fixup,
                .dpcm_capture = 1,
                .no_pcm = 1,
        },