ASoC: Intel: Skylake: Constrain the audio devices

In ref configuration for Skylake, we support only 16bit, 48KHz,
stereo audio, so specify these as constrains for the devices

Signed-off-by: Jeeja KP <jeeja.kp@intel.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

diff --git a/sound/soc/intel/boards/skl_rt286.c b/sound/soc/intel/boards/skl_rt286.c
index e6af484912296e6bbb02edbd2af92a968757b3fe..9c67e05a24b3a977292614561fc7dbe0f0c4ce83 100644 (file)
--- a/sound/soc/intel/boards/skl_rt286.c
+++ b/sound/soc/intel/boards/skl_rt286.c
@@ -104,6 +104,53 @@ static int skylake_rt286_codec_init(struct snd_soc_pcm_runtime *rtd)
        return 0;
 }
 
+static unsigned int rates[] = {
+       48000,
+};
+
+static struct snd_pcm_hw_constraint_list constraints_rates = {
+       .count = ARRAY_SIZE(rates),
+       .list  = rates,
+       .mask = 0,
+};
+
+static unsigned int channels[] = {
+       2,
+};
+
+static struct snd_pcm_hw_constraint_list constraints_channels = {
+       .count = ARRAY_SIZE(channels),
+       .list = channels,
+       .mask = 0,
+};
+
+static int skl_fe_startup(struct snd_pcm_substream *substream)
+{
+       struct snd_pcm_runtime *runtime = substream->runtime;
+
+       /*
+        * on this platform for PCM device we support,
+        *      48Khz
+        *      stereo
+        *      16 bit audio
+        */
+
+       runtime->hw.channels_max = 2;
+       snd_pcm_hw_constraint_list(runtime, 0, SNDRV_PCM_HW_PARAM_CHANNELS,
+                                          &constraints_channels);
+
+       runtime->hw.formats = SNDRV_PCM_FMTBIT_S16_LE;
+       snd_pcm_hw_constraint_msbits(runtime, 0, 16, 16);
+
+       snd_pcm_hw_constraint_list(runtime, 0,
+                               SNDRV_PCM_HW_PARAM_RATE, &constraints_rates);
+
+       return 0;
+}
+
+static const struct snd_soc_ops skylake_rt286_fe_ops = {
+       .startup = skl_fe_startup,
+};
 
 static int skylake_ssp0_fixup(struct snd_soc_pcm_runtime *rtd,
                        struct snd_pcm_hw_params *params)
@@ -160,6 +207,7 @@ static struct snd_soc_dai_link skylake_rt286_dais[] = {
                        SND_SOC_DPCM_TRIGGER_POST
                },
                .dpcm_playback = 1,
+               .ops = &skylake_rt286_fe_ops,
        },
        {
                .name = "Skl Audio Capture Port",
@@ -175,6 +223,7 @@ static struct snd_soc_dai_link skylake_rt286_dais[] = {
                        SND_SOC_DPCM_TRIGGER_POST
                },
                .dpcm_capture = 1,
+               .ops = &skylake_rt286_fe_ops,
        },
        {
                .name = "Skl Audio Reference cap",