Re: [PATCH v5 18/21] ASoC: qdsp6: audioreach: add q6apm-dai support

Signed-off-by: Srinivas Kandagatla <redacted>
---
 sound/soc/qcom/Kconfig           |   5 +
 sound/soc/qcom/qdsp6/Makefile    |   1 +
 sound/soc/qcom/qdsp6/q6apm-dai.c | 504 +++++++++++++++++++++++++++++++
 3 files changed, 510 insertions(+)
 create mode 100644 sound/soc/qcom/qdsp6/q6apm-dai.c

diff --git a/sound/soc/qcom/Kconfig b/sound/soc/qcom/Kconfig
index 66d8436ab0a8..fb1921889dc4 100644
--- a/sound/soc/qcom/Kconfig
+++ b/sound/soc/qcom/Kconfig

@@ -84,7 +84,12 @@ config SND_SOC_QDSP6_ASM_DAI
 	select SND_SOC_COMPRESS
 	tristate
 
+config SND_SOC_QDSP6_APM_DAI
+	select SND_SOC_COMPRESS
+	tristate
+
 config SND_SOC_QDSP6_APM
+	select SND_SOC_QDSP6_APM_DAI
 	tristate

+static int q6apm_dai_prepare(struct snd_soc_component *component,
+			     struct snd_pcm_substream *substream)
+{
+	struct snd_pcm_runtime *runtime = substream->runtime;
+	struct q6apm_dai_rtd *prtd = runtime->private_data;
+	struct audioreach_module_config cfg;
+	struct q6apm_dai_data *pdata;
+	int ret;
+
+	pdata = snd_soc_component_get_drvdata(component);
+	if (!pdata)
+		return -EINVAL;
+
+	if (!prtd || !prtd->graph) {
+		dev_err(component->dev, "%s: private data null or audio client freed\n",
+			__func__);
+		return -EINVAL;
+	}
+
+	cfg.direction = substream->stream;
+	cfg.sample_rate = runtime->rate;
+	cfg.num_channels = runtime->channels;
+	cfg.bit_width = prtd->bits_per_sample;
+
+	prtd->pcm_count = snd_pcm_lib_period_bytes(substream);
+	prtd->pcm_irq_pos = 0;
+	/* rate and channels are sent to audio driver */
+	ret = q6apm_graph_media_format_shmem(prtd->graph, &cfg);
+	if (ret < 0) {
+		dev_err(component->dev, "%s: q6apm_open_write failed\n", __func__);
+		return ret;
+	}
+
+	ret = q6apm_graph_media_format_pcm(prtd->graph, &cfg);
+	if (ret < 0)
+		pr_info("%s: CMD Format block failed\n", __func__);
+
+	ret = q6apm_map_memory_regions(prtd->graph,
+				       substream->stream,
+				       prtd->phys,
+				       (prtd->pcm_size / prtd->periods),
+				       prtd->periods);
+
+	if (ret < 0) {
+		dev_err(component->dev, "Audio Start: Buffer Allocation failed rc = %d\n",
+							ret);
+		return -ENOMEM;
+	}
+
+	ret = q6apm_graph_prepare(prtd->graph);
+	if (ret) {
+		dev_err(component->dev, "Failed to prepare Graph %d\n", ret);
+		return ret;
+	}
+
+	ret = q6apm_graph_start(prtd->graph);
+	if (ret) {
+		dev_err(component->dev, "Failed to Start Graph %d\n", ret);
+		return ret;
+	}
+
+	if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) {
+		int i;
+		/* Queue the buffers */
+		for (i = 0; i < runtime->periods; i++)
+			q6apm_read(prtd->graph);
+
+	}

+	prtd->state = Q6APM_STREAM_RUNNING;
+
+	return 0;
+}
+
+static int q6apm_dai_trigger(struct snd_soc_component *component,
+			     struct snd_pcm_substream *substream, int cmd)
+{
+	struct snd_pcm_runtime *runtime = substream->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:
+		if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
+			ret = q6apm_write_async(prtd->graph, prtd->pcm_count, 0, 0, NO_TIMESTAMP);
+		break;

+		break;
+	case SNDRV_PCM_TRIGGER_SUSPEND:
+	case SNDRV_PCM_TRIGGER_PAUSE_PUSH:

+		break;
+	default:
+		ret = -EINVAL;
+		break;
+	}
+
+	return ret;
+}
+
+static int q6apm_dai_open(struct snd_soc_component *component,
+			  struct snd_pcm_substream *substream)
+{
+	struct snd_pcm_runtime *runtime = substream->runtime;
+	struct snd_soc_pcm_runtime *soc_prtd = substream->private_data;
+	struct snd_soc_dai *cpu_dai = asoc_rtd_to_cpu(soc_prtd, 0);
+	struct q6apm_dai_rtd *prtd;
+	struct q6apm_dai_data *pdata;
+	struct device *dev = component->dev;
+	int ret;
+	int graph_id;
+
+	graph_id = cpu_dai->driver->id;
+
+	pdata = snd_soc_component_get_drvdata(component);
+	if (!pdata) {
+		dev_err(component->dev, "Drv data not found ..\n");

+		return -EINVAL;
+	}
+
+	prtd = kzalloc(sizeof(*prtd), GFP_KERNEL);
+	if (prtd == NULL)

+		return -ENOMEM;
+
+	prtd->substream = substream;
+
+	prtd->graph = q6apm_graph_open(dev, (q6apm_cb)event_handler,
+				       prtd, graph_id);
+	if (IS_ERR(prtd->graph)) {
+		pr_info("%s: Could not allocate memory\n", __func__);

+		ret = PTR_ERR(prtd->graph);
+		kfree(prtd);
+		return ret;
+	}
+
+	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
+		runtime->hw = q6apm_dai_hardware_playback;
+	else if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
+		runtime->hw = q6apm_dai_hardware_capture;
+
+	/* Ensure that buffer size is a multiple of period size */
+	ret = snd_pcm_hw_constraint_integer(runtime,
+					    SNDRV_PCM_HW_PARAM_PERIODS);
+	if (ret < 0) {
+		dev_err(dev, "snd_pcm_hw_constraint_integer failed\n");
+		return ret;

+	}
+
+	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
+		ret = snd_pcm_hw_constraint_minmax(runtime,
+			SNDRV_PCM_HW_PARAM_BUFFER_BYTES,
+			BUFFER_BYTES_MIN, BUFFER_BYTES_MAX);
+		if (ret < 0) {
+			dev_err(dev, "constraint for buffer bytes min max ret = %d\n",
+									ret);
+			return ret;
+		}
+	}
+
+	ret = snd_pcm_hw_constraint_step(runtime, 0,
+					 SNDRV_PCM_HW_PARAM_PERIOD_BYTES, 32);
+	if (ret < 0) {
+		dev_err(dev, "constraint for period bytes step ret = %d\n",
+								ret);
+		return ret;
+	}
+	ret = snd_pcm_hw_constraint_step(runtime, 0,
+					 SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 32);
+	if (ret < 0) {
+		dev_err(dev, "constraint for buffer bytes step ret = %d\n",
+								ret);
+		return ret;
+	}
+
+	runtime->private_data = prtd;
+	runtime->dma_bytes = BUFFER_BYTES_MAX;
+	if (pdata->sid < 0)
+		prtd->phys = substream->dma_buffer.addr;
+	else
+		prtd->phys = substream->dma_buffer.addr | (pdata->sid << 32);
+
+	snd_pcm_set_runtime_buffer(substream, &substream->dma_buffer);
+
+	return 0;
+}
+
+static int q6apm_dai_close(struct snd_soc_component *component,
+			   struct snd_pcm_substream *substream)
+{
+	struct snd_pcm_runtime *runtime = substream->runtime;
+	struct q6apm_dai_rtd *prtd = runtime->private_data;
+
+	if (prtd && prtd->graph) {

+		q6apm_graph_stop(prtd->graph);
+
+		q6apm_unmap_memory_regions(prtd->graph,
+					   substream->stream);
+		q6apm_graph_close(prtd->graph);
+		prtd->graph = NULL;
+		kfree(prtd);
+		runtime->private_data = NULL;
+	}
+
+	return 0;
+}
+
+static snd_pcm_uframes_t q6apm_dai_pointer(struct snd_soc_component *component,
+					   struct snd_pcm_substream *substream)
+{
+
+	struct snd_pcm_runtime *runtime = substream->runtime;
+	struct q6apm_dai_rtd *prtd = runtime->private_data;
+
+	if (prtd->pcm_irq_pos >= prtd->pcm_size)
+		prtd->pcm_irq_pos = 0;

+
+	return bytes_to_frames(runtime, (prtd->pcm_irq_pos));
+}
+
+static int q6apm_dai_mmap(struct snd_soc_component *component,
+			  struct snd_pcm_substream *substream,
+			  struct vm_area_struct *vma)
+{
+	struct snd_pcm_runtime *runtime = substream->runtime;
+	struct device *dev = component->dev;
+
+	return dma_mmap_coherent(dev, vma,
+			runtime->dma_area, runtime->dma_addr,
+			runtime->dma_bytes);
+}
+
+static int q6apm_dai_hw_params(struct snd_soc_component *component,
+			       struct snd_pcm_substream *substream,
+			       struct snd_pcm_hw_params *params)
+{
+	struct snd_pcm_runtime *runtime = substream->runtime;
+	struct q6apm_dai_rtd *prtd = runtime->private_data;
+
+	prtd->pcm_size = params_buffer_bytes(params);
+	prtd->periods = params_periods(params);
+
+	switch (params_format(params)) {
+	case SNDRV_PCM_FORMAT_S16_LE:
+		prtd->bits_per_sample = 16;
+		break;
+	case SNDRV_PCM_FORMAT_S24_LE:
+		prtd->bits_per_sample = 24;
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
+static int q6apm_dai_pcm_new(struct snd_soc_component *component,
+			     struct snd_soc_pcm_runtime *rtd)
+{
+	struct snd_pcm_substream *psubstream, *csubstream;
+	struct snd_pcm *pcm = rtd->pcm;
+	struct device *dev;
+	int size, ret;
+
+	dev = component->dev;
+	size = BUFFER_BYTES_MAX;
+	psubstream = pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream;
+	if (psubstream) {
+		ret = snd_dma_alloc_pages(SNDRV_DMA_TYPE_DEV, dev, size,
+					  &psubstream->dma_buffer);
+		if (ret) {
+			dev_err(dev, "Cannot allocate buffer(s)\n");

+			return ret;
+		}
+	}
+
+	csubstream = pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream;
+	if (csubstream) {
+		ret = snd_dma_alloc_pages(SNDRV_DMA_TYPE_DEV, dev, size,
+					  &csubstream->dma_buffer);
+		if (ret) {
+			dev_err(dev, "Cannot allocate buffer(s)\n");

+			if (psubstream)
+				snd_dma_free_pages(&psubstream->dma_buffer);
+			return ret;
+		}
+	}
+
+	return 0;
+}