ASoC: Intel: update bxt_da7219_max98357a to support quad ch dmic capture

This patch updates FE channel constraints & BE fixup to support
quad channel DMIC capture.
DMIC pin's BE fixup is configured based on channel input, i.e.
either stereo or quad.

Signed-off-by: Sathyanarayana Nujella <sathyanarayana.nujella@intel.com>
Signed-off-by: Harsha Priya <harshapriya.n@intel.com>
Acked-by: Vinod Koul <vinod.koul@intel.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

1 files changed, 17 insertions, 3 deletions

diff --git a/sound/soc/intel/boards/bxt_da7219_max98357a.c b/sound/soc/intel/boards/bxt_da7219_max98357a.c
index bff80b467262..3a8c24a59020 100644
--- a/sound/soc/intel/boards/bxt_da7219_max98357a.c
+++ b/sound/soc/intel/boards/bxt_da7219_max98357a.c
@@ -30,6 +30,7 @@
 #define BXT_DIALOG_CODEC_DAI    "da7219-hifi"
 #define BXT_MAXIM_CODEC_DAI     "HiFi"
 #define DUAL_CHANNEL            2
+#define QUAD_CHANNEL            4
 
 static struct snd_soc_jack broxton_headset;
 
@@ -182,6 +183,16 @@ static struct snd_pcm_hw_constraint_list constraints_channels = {
         .mask = 0,
 };
 
+static unsigned int channels_quad[] = {
+        QUAD_CHANNEL,
+};
+
+static struct snd_pcm_hw_constraint_list constraints_channels_quad = {
+        .count = ARRAY_SIZE(channels_quad),
+        .list = channels_quad,
+        .mask = 0,
+};
+
 static int bxt_fe_startup(struct snd_pcm_substream *substream)
 {
         struct snd_pcm_runtime *runtime = substream->runtime;
@@ -258,7 +269,10 @@ static int broxton_dmic_fixup(struct snd_soc_pcm_runtime *rtd,
 {
         struct snd_interval *channels = hw_param_interval(params,
                                                 SNDRV_PCM_HW_PARAM_CHANNELS);
-        channels->min = channels->max = DUAL_CHANNEL;
+        if (params_channels(params) == 2)
+                channels->min = channels->max = 2;
+        else
+                channels->min = channels->max = 4;
 
         return 0;
 }
@@ -267,9 +281,9 @@ static int broxton_dmic_startup(struct snd_pcm_substream *substream)
 {
         struct snd_pcm_runtime *runtime = substream->runtime;
 
-        runtime->hw.channels_max = DUAL_CHANNEL;
+        runtime->hw.channels_min = runtime->hw.channels_max = QUAD_CHANNEL;
         snd_pcm_hw_constraint_list(runtime, 0, SNDRV_PCM_HW_PARAM_CHANNELS,
-                        &constraints_channels);
+                        &constraints_channels_quad);
 
         return snd_pcm_hw_constraint_list(substream->runtime, 0,
                         SNDRV_PCM_HW_PARAM_RATE, &constraints_rates);