[PATCH] ASoC: qdsp6: q6apm-dai: unprepare stream if its already prepared

[Srinivas Kandagatla]

prepare callback can be called multiple times, so unprepare the stream
if its already prepared.

Without this DSP is not happy to setting the params on a already
prepared graph.

Fixes: 9b4fe0f1cd79 ("ASoC: qdsp6: audioreach: add q6apm-dai support")
Reported-by: Srinivasa Rao Mandadapu <quic_srivasam at quicinc.com>
Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla at linaro.org>
---
 sound/soc/qcom/qdsp6/q6apm-dai.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/sound/soc/qcom/qdsp6/q6apm-dai.c b/sound/soc/qcom/qdsp6/q6apm-dai.c
index 19c4a90ec1ea..ee59ef36b85a 100644
--- a/sound/soc/qcom/qdsp6/q6apm-dai.c
+++ b/sound/soc/qcom/qdsp6/q6apm-dai.c
@@ -147,6 +147,12 @@ static int q6apm_dai_prepare(struct snd_soc_component *component,
 	cfg.num_channels = runtime->channels;
 	cfg.bit_width = prtd->bits_per_sample;
 
+	if (prtd->state) {
+		/* clear the previous setup if any  */
+		q6apm_graph_stop(prtd->graph);
+		q6apm_unmap_memory_regions(prtd->graph, substream->stream);
+	}
+
 	prtd->pcm_count = snd_pcm_lib_period_bytes(substream);
 	prtd->pos = 0;
 	/* rate and channels are sent to audio driver */
-- 
2.25.1