Implement a constrain to exclude 3-channel capture since only 2 and 4
channel capture are supported on the platform.
Signed-off-by: Brent Lu <brent.lu@xxxxxxxxx>
---
sound/soc/intel/boards/bdw-rt5650.c | 31 +++++++++++++++++++++++++++++++
1 file changed, 31 insertions(+)
diff --git a/sound/soc/intel/boards/bdw-rt5650.c b/sound/soc/intel/boards/bdw-rt5650.c
index af2f502..eedbdad 100644
--- a/sound/soc/intel/boards/bdw-rt5650.c
+++ b/sound/soc/intel/boards/bdw-rt5650.c
@@ -83,6 +83,36 @@ static struct snd_soc_jack_pin mic_jack_pin = {
.mask = SND_JACK_MICROPHONE,
};
+static const unsigned int channels[] = {
+ 2, 4,
+};
+
+static const struct snd_pcm_hw_constraint_list constraints_channels = {
+ .count = ARRAY_SIZE(channels),
+ .list = channels,
+ .mask = 0,
+};
+
+static int bdw_fe_startup(struct snd_pcm_substream *substream)
+{
+ struct snd_pcm_runtime *runtime = substream->runtime;
+
+ /*
+ * On this platform for PCM device we support,
+ * 2 or 4 channel capture
+ */
+ if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
+ snd_pcm_hw_constraint_list(runtime, 0,
+ SNDRV_PCM_HW_PARAM_CHANNELS,
+ &constraints_channels);
+
+ return 0;
+}
+
+static const struct snd_soc_ops bdw_rt5650_fe_ops = {
+ .startup = bdw_fe_startup,
+};
+
static int broadwell_ssp0_fixup(struct snd_soc_pcm_runtime *rtd,
struct snd_pcm_hw_params *params)
{
@@ -234,6 +264,7 @@ static struct snd_soc_dai_link bdw_rt5650_dais[] = {
.name = "System PCM",
.stream_name = "System Playback",
.dynamic = 1,
+ .ops = &bdw_rt5650_fe_ops,
#if !IS_ENABLED(CONFIG_SND_SOC_SOF_BROADWELL)
.init = bdw_rt5650_rtd_init,
#endif
--
2.7.4
