[PATCH v24 34/34] ASoC: qcom: qdsp6: 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@xxxxxxxxxxx>
---
 sound/soc/qcom/qdsp6/q6usb.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/sound/soc/qcom/qdsp6/q6usb.c b/sound/soc/qcom/qdsp6/q6usb.c
index d8f1bb4ec497..9a3fb3cb32b2 100644
--- a/sound/soc/qcom/qdsp6/q6usb.c
+++ b/sound/soc/qcom/qdsp6/q6usb.c
@@ -52,6 +52,7 @@ static int q6usb_hw_params(struct snd_pcm_substream *substream,
 	struct q6usb_port_data *data = dev_get_drvdata(dai->dev);
 	struct snd_soc_pcm_runtime *rtd = substream->private_data;
 	struct snd_soc_dai *cpu_dai = snd_soc_rtd_to_cpu(rtd, 0);
+	int direction = substream->stream;
 	struct q6afe_port *q6usb_afe;
 	struct snd_soc_usb_device *sdev;
 	int ret;
@@ -63,6 +64,10 @@ static int q6usb_hw_params(struct snd_pcm_substream *substream,
 	mutex_lock(&data->mutex);
 	sdev = list_last_entry(&data->devices, struct snd_soc_usb_device, list);
 
+	ret = snd_soc_usb_find_supported_format(sdev->chip_idx, params, direction);
+	if (ret < 0)
+		goto out;
+
 	q6usb_afe = q6afe_port_get_from_id(cpu_dai->dev, USB_RX);
 	if (IS_ERR(q6usb_afe))
 		goto out;