ASoC: Intel: Add DMIC 4 channel support for bxt machine

Like Skylake, we can support  4 channel for DMIC, so add
hw_params and constraints in the bxt-rt298 machine

While at it, also add codec1 pipe for speaker playback.

Signed-off-by: Senthilnathan Veppur <senthilnathanx.veppur@intel.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

1 files changed, 66 insertions, 0 deletions

diff --git a/sound/soc/intel/boards/bxt_rt298.c b/sound/soc/intel/boards/bxt_rt298.c
index f4787515c0ed..9b649b6cc757 100644
--- a/sound/soc/intel/boards/bxt_rt298.c
+++ b/sound/soc/intel/boards/bxt_rt298.c
@@ -33,6 +33,7 @@ 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,
@@ -88,6 +89,7 @@ static const struct snd_soc_dapm_route broxton_rt298_map[] = {
         /* CODEC BE connections */
         { "AIF1 Playback", NULL, "ssp5 Tx"},
         { "ssp5 Tx", NULL, "codec0_out"},
+        { "ssp5 Tx", NULL, "codec1_out"},
 
         { "codec0_in", NULL, "ssp5 Rx" },
         { "ssp5 Rx", NULL, "AIF1 Capture" },
@@ -169,6 +171,55 @@ static struct snd_soc_ops broxton_rt298_ops = {
         .hw_params = broxton_rt298_hw_params,
 };
 
+static unsigned int rates[] = {
+        48000,
+};
+
+static struct snd_pcm_hw_constraint_list constraints_rates = {
+        .count = ARRAY_SIZE(rates),
+        .list  = rates,
+        .mask = 0,
+};
+
+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);
+        if (params_channels(params) == 2)
+                channels->min = channels->max = 2;
+        else
+                channels->min = channels->max = 4;
+
+        return 0;
+}
+
+static unsigned int channels_dmic[] = {
+        2, 4,
+};
+
+static struct snd_pcm_hw_constraint_list constraints_dmic_channels = {
+        .count = ARRAY_SIZE(channels_dmic),
+        .list = channels_dmic,
+        .mask = 0,
+};
+
+static int broxton_dmic_startup(struct snd_pcm_substream *substream)
+{
+        struct snd_pcm_runtime *runtime = substream->runtime;
+
+        runtime->hw.channels_max = 4;
+        snd_pcm_hw_constraint_list(runtime, 0, SNDRV_PCM_HW_PARAM_CHANNELS,
+                                        &constraints_dmic_channels);
+
+        return snd_pcm_hw_constraint_list(substream->runtime, 0,
+                                SNDRV_PCM_HW_PARAM_RATE, &constraints_rates);
+}
+
+static struct snd_soc_ops broxton_dmic_ops = {
+        .startup = broxton_dmic_startup,
+};
+
 /* broxton digital audio interface glue - connects codec <--> CPU */
 static struct snd_soc_dai_link broxton_rt298_dais[] = {
         /* Front End DAI links */
@@ -211,6 +262,20 @@ static struct snd_soc_dai_link broxton_rt298_dais[] = {
                 .nonatomic = 1,
                 .dynamic = 1,
         },
+        [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]
         {
                 .name = "Bxt HDMI Port1",
@@ -276,6 +341,7 @@ static struct snd_soc_dai_link broxton_rt298_dais[] = {
                 .codec_name = "dmic-codec",
                 .codec_dai_name = "dmic-hifi",
                 .platform_name = "0000:00:0e.0",
+                .be_hw_params_fixup = broxton_dmic_fixup,
                 .ignore_suspend = 1,
                 .dpcm_capture = 1,
                 .no_pcm = 1,