linux-kernel - [RFC PATCH v2 6/6] ASoC: q6asm-dai: add support to set_codec

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Date:   Tue, 21 Jul 2020 18:00:07 +0100
From:   Srinivas Kandagatla <srinivas.kandagatla@...aro.org>
To:     broonie@...nel.org
Cc:     vkoul@...nel.org, perex@...ex.cz, tiwai@...e.com,
        lgirdwood@...il.com, alsa-devel@...a-project.org,
        linux-kernel@...r.kernel.org, ckeepax@...nsource.cirrus.com,
        Srinivas Kandagatla <srinivas.kandagatla@...aro.org>
Subject: [RFC PATCH v2 6/6] ASoC: q6asm-dai: add support to set_codec_params

Make use of new set_codec_params callback to allow decoder switching
during gapless playback.

Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@...aro.org>
---
 sound/soc/qcom/qdsp6/q6asm-dai.c | 33 ++++++++++++++++++++++++++++++++
 1 file changed, 33 insertions(+)

diff --git a/sound/soc/qcom/qdsp6/q6asm-dai.c b/sound/soc/qcom/qdsp6/q6asm-dai.c
index b5c719682919..a8cfb1996614 100644
--- a/sound/soc/qcom/qdsp6/q6asm-dai.c
+++ b/sound/soc/qcom/qdsp6/q6asm-dai.c
@@ -876,6 +876,37 @@ static int __q6asm_dai_compr_set_codec_params(struct snd_soc_component *componen
 	return 0;
 }
 
+static int q6asm_dai_compr_set_codec_params(struct snd_soc_component *component,
+					    struct snd_compr_stream *stream,
+					    struct snd_codec *codec)
+{
+	struct snd_compr_runtime *runtime = stream->runtime;
+	struct q6asm_dai_rtd *prtd = runtime->private_data;
+	int ret;
+
+	ret = q6asm_open_write(prtd->audio_client, prtd->next_track_stream_id,
+			       codec->id, codec->profile, prtd->bits_per_sample,
+			       true);
+	if (ret < 0) {
+		pr_err("q6asm_open_write failed\n");
+		return ret;
+	}
+
+	ret = __q6asm_dai_compr_set_codec_params(component, stream, codec,
+						 prtd->next_track_stream_id);
+	if (ret < 0) {
+		pr_err("q6asm_open_write failed\n");
+		return ret;
+	}
+
+	ret = q6asm_stream_remove_initial_silence(prtd->audio_client,
+						   prtd->next_track_stream_id,
+						   prtd->initial_samples_drop);
+	prtd->next_track_stream_id = 0;
+
+	return ret;
+}
+
 static int q6asm_dai_compr_set_params(struct snd_soc_component *component,
 				      struct snd_compr_stream *stream,
 				      struct snd_compr_params *params)
@@ -1144,6 +1175,7 @@ static int q6asm_dai_compr_get_caps(struct snd_soc_component *component,
 	caps->max_fragment_size = COMPR_PLAYBACK_MAX_FRAGMENT_SIZE;
 	caps->min_fragments = COMPR_PLAYBACK_MIN_NUM_FRAGMENTS;
 	caps->max_fragments = COMPR_PLAYBACK_MAX_NUM_FRAGMENTS;
+	caps->flags = SND_COMPR_CAP_FLAGS_DSP_CAN_SWITCH_DECODER;
 	caps->num_codecs = 5;
 	caps->codecs[0] = SND_AUDIOCODEC_MP3;
 	caps->codecs[1] = SND_AUDIOCODEC_FLAC;
@@ -1173,6 +1205,7 @@ static struct snd_compress_ops q6asm_dai_compress_ops = {
 	.open		= q6asm_dai_compr_open,
 	.free		= q6asm_dai_compr_free,
 	.set_params	= q6asm_dai_compr_set_params,
+	.set_codec_params = q6asm_dai_compr_set_codec_params,
 	.set_metadata	= q6asm_dai_compr_set_metadata,
 	.pointer	= q6asm_dai_compr_pointer,
 	.trigger	= q6asm_dai_compr_trigger,
-- 
2.21.0