[RFC PATCH 12/14] sound: soc: qcom: qusb6: Ensure PCM format is supported by USB audio device

[Wesley Cheng]

Check for if the PCM format is supported during the hw_params callback.  If
the profile is not supported then the userspace ALSA entity will receive an
error, and can take further action.

Signed-off-by: Wesley Cheng <quic_wcheng at quicinc.com>
---
 sound/soc/qcom/qdsp6/q6usb.c | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/sound/soc/qcom/qdsp6/q6usb.c b/sound/soc/qcom/qdsp6/q6usb.c
index a9da6dec6c6f..128e0974db4e 100644
--- a/sound/soc/qcom/qdsp6/q6usb.c
+++ b/sound/soc/qcom/qdsp6/q6usb.c
@@ -42,7 +42,14 @@ static int q6usb_hw_params(struct snd_pcm_substream *substream,
 			   struct snd_pcm_hw_params *params,
 			   struct snd_soc_dai *dai)
 {
-	return 0;
+	struct q6usb_port_data *data = dev_get_drvdata(dai->dev);
+	int direction = substream->stream;
+	int ret;
+
+	ret = snd_soc_usb_find_format(data->active_idx, params, direction);
+
+	return ret;
+
 }
 static const struct snd_soc_dai_ops q6usb_ops = {
 	.hw_params	= q6usb_hw_params,