ASoC: q6dsp: q6apm-dai: Add trigger/pointer compress DAI callbacks

Add q6apm trigger and pointer compress DAI callbacks to support
compress offload playback.

Co-developed-by: Mohammad Rafi Shaik <quic_mohs@quicinc.com>
Signed-off-by: Mohammad Rafi Shaik <quic_mohs@quicinc.com>
Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Link: https://lore.kernel.org/r/20230619101653.9750-10-srinivas.kandagatla@linaro.org
Signed-off-by: Mark Brown <broonie@kernel.org>

Author: Srinivas-Kandagatla

sound/soc/qcom/qdsp6/q6apm-dai.c

@@ -568,11 +568,78 @@ static int q6apm_dai_compr_get_codec_caps(struct snd_soc_component *component,
 
 	return 0;
 }
+
+static int q6apm_dai_compr_pointer(struct snd_soc_component *component,
+				   struct snd_compr_stream *stream,
+				   struct snd_compr_tstamp *tstamp)
+{
+	struct snd_compr_runtime *runtime = stream->runtime;
+	struct q6apm_dai_rtd *prtd = runtime->private_data;
+	unsigned long flags;
+
+	spin_lock_irqsave(&prtd->lock, flags);
+	tstamp->copied_total = prtd->copied_total;
+	tstamp->byte_offset = prtd->copied_total % prtd->pcm_size;
+	spin_unlock_irqrestore(&prtd->lock, flags);
+
+	return 0;
+}
+
+static int q6apm_dai_compr_trigger(struct snd_soc_component *component,
+			    struct snd_compr_stream *stream, int cmd)
+{
+	struct snd_compr_runtime *runtime = stream->runtime;
+	struct q6apm_dai_rtd *prtd = runtime->private_data;
+	int ret = 0;
+
+	switch (cmd) {
+	case SNDRV_PCM_TRIGGER_START:
+	case SNDRV_PCM_TRIGGER_RESUME:
+	case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
+		ret = q6apm_write_async(prtd->graph, prtd->pcm_count, 0, 0, NO_TIMESTAMP);
+		break;
+	case SNDRV_PCM_TRIGGER_STOP:
+		break;
+	case SNDRV_PCM_TRIGGER_SUSPEND:
+	case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
+		break;
+	case SND_COMPR_TRIGGER_NEXT_TRACK:
+		prtd->next_track = true;
+		break;
+	case SND_COMPR_TRIGGER_DRAIN:
+	case SND_COMPR_TRIGGER_PARTIAL_DRAIN:
+		prtd->notify_on_drain = true;
+		break;
+	default:
+		ret = -EINVAL;
+		break;
+	}
+
+	return ret;
+}
+
+static int q6apm_dai_compr_ack(struct snd_soc_component *component, struct snd_compr_stream *stream,
+			size_t count)
+{
+	struct snd_compr_runtime *runtime = stream->runtime;
+	struct q6apm_dai_rtd *prtd = runtime->private_data;
+	unsigned long flags;
+
+	spin_lock_irqsave(&prtd->lock, flags);
+	prtd->bytes_received += count;
+	spin_unlock_irqrestore(&prtd->lock, flags);
+
+	return count;
+}
+
 static const struct snd_compress_ops q6apm_dai_compress_ops = {
 	.open		= q6apm_dai_compr_open,
 	.free		= q6apm_dai_compr_free,
 	.get_caps	= q6apm_dai_compr_get_caps,
 	.get_codec_caps	= q6apm_dai_compr_get_codec_caps,
+	.pointer	= q6apm_dai_compr_pointer,
+	.trigger	= q6apm_dai_compr_trigger,
+	.ack		= q6apm_dai_compr_ack,
 };
 
 static const struct snd_soc_component_driver q6apm_fe_dai_component = {

sound/soc/qcom/qdsp6/q6apm.h

@@ -46,6 +46,7 @@
 
 #define APM_MAX_SESSIONS			8
 #define APM_LAST_BUFFER_FLAG			BIT(30)
+#define NO_TIMESTAMP				0xFF00
 
 struct q6apm {
 	struct device *dev;