1 files changed, 84 insertions, 17 deletions

diff --git a/sound/soc/soc-generic-dmaengine-pcm.c b/sound/soc/soc-generic-dmaengine-pcm.c
index e29ec3c..0c469cb 100644
--- a/sound/soc/soc-generic-dmaengine-pcm.c
+++ b/sound/soc/soc-generic-dmaengine-pcm.c
@@ -36,6 +36,15 @@ static struct dmaengine_pcm *soc_platform_to_pcm(struct snd_soc_platform *p)
 	return container_of(p, struct dmaengine_pcm, platform);
 }
 
+static struct device *dmaengine_dma_dev(struct dmaengine_pcm *pcm,
+	struct snd_pcm_substream *substream)
+{
+	if (!pcm->chan[substream->stream])
+		return NULL;
+
+	return pcm->chan[substream->stream]->device->dev;
+}
+
 /**
  * snd_dmaengine_pcm_prepare_slave_config() - Generic prepare_slave_config callback
  * @substream: PCM substream
@@ -75,12 +84,19 @@ static int dmaengine_pcm_hw_params(struct snd_pcm_substream *substream,
 	struct snd_soc_pcm_runtime *rtd = substream->private_data;
 	struct dmaengine_pcm *pcm = soc_platform_to_pcm(rtd->platform);
 	struct dma_chan *chan = snd_dmaengine_pcm_get_chan(substream);
+	int (*prepare_slave_config)(struct snd_pcm_substream *substream,
+			struct snd_pcm_hw_params *params,
+			struct dma_slave_config *slave_config);
 	struct dma_slave_config slave_config;
 	int ret;
 
-	if (pcm->config->prepare_slave_config) {
-		ret = pcm->config->prepare_slave_config(substream, params,
-				&slave_config);
+	if (!pcm->config)
+		prepare_slave_config = snd_dmaengine_pcm_prepare_slave_config;
+	else
+		prepare_slave_config = pcm->config->prepare_slave_config;
+
+	if (prepare_slave_config) {
+		ret = prepare_slave_config(substream, params, &slave_config);
 		if (ret)
 			return ret;
 
@@ -92,28 +108,54 @@ static int dmaengine_pcm_hw_params(struct snd_pcm_substream *substream,
 	return snd_pcm_lib_malloc_pages(substream, params_buffer_bytes(params));
 }
 
-static int dmaengine_pcm_open(struct snd_pcm_substream *substream)
+static int dmaengine_pcm_set_runtime_hwparams(struct snd_pcm_substream *substream)
 {
 	struct snd_soc_pcm_runtime *rtd = substream->private_data;
 	struct dmaengine_pcm *pcm = soc_platform_to_pcm(rtd->platform);
+	struct device *dma_dev = dmaengine_dma_dev(pcm, substream);
 	struct dma_chan *chan = pcm->chan[substream->stream];
+	struct snd_dmaengine_dai_dma_data *dma_data;
+	struct dma_slave_caps dma_caps;
+	struct snd_pcm_hardware hw;
 	int ret;
 
-	ret = snd_soc_set_runtime_hwparams(substream,
+	if (pcm->config && pcm->config->pcm_hardware)
+		return snd_soc_set_runtime_hwparams(substream,
 				pcm->config->pcm_hardware);
-	if (ret)
-		return ret;
 
-	return snd_dmaengine_pcm_open(substream, chan);
+	dma_data = snd_soc_dai_get_dma_data(rtd->cpu_dai, substream);
+
+	memset(&hw, 0, sizeof(hw));
+	hw.info = SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_MMAP_VALID |
+			SNDRV_PCM_INFO_INTERLEAVED;
+	hw.periods_min = 2;
+	hw.periods_max = UINT_MAX;
+	hw.period_bytes_min = 256;
+	hw.period_bytes_max = dma_get_max_seg_size(dma_dev);
+	hw.buffer_bytes_max = SIZE_MAX;
+	hw.fifo_size = dma_data->fifo_size;
+
+	ret = dma_get_slave_caps(chan, &dma_caps);
+	if (ret == 0) {
+		if (dma_caps.cmd_pause)
+			hw.info |= SNDRV_PCM_INFO_PAUSE | SNDRV_PCM_INFO_RESUME;
+	}
+
+	return snd_soc_set_runtime_hwparams(substream, &hw);
 }
 
-static struct device *dmaengine_dma_dev(struct dmaengine_pcm *pcm,
-	struct snd_pcm_substream *substream)
+static int dmaengine_pcm_open(struct snd_pcm_substream *substream)
 {
-	if (!pcm->chan[substream->stream])
-		return NULL;
+	struct snd_soc_pcm_runtime *rtd = substream->private_data;
+	struct dmaengine_pcm *pcm = soc_platform_to_pcm(rtd->platform);
+	struct dma_chan *chan = pcm->chan[substream->stream];
+	int ret;
 
-	return pcm->chan[substream->stream]->device->dev;
+	ret = dmaengine_pcm_set_runtime_hwparams(substream);
+	if (ret)
+		return ret;
+
+	return snd_dmaengine_pcm_open(substream, chan);
 }
 
 static void dmaengine_pcm_free(struct snd_pcm *pcm)
@@ -126,6 +168,9 @@ static struct dma_chan *dmaengine_pcm_compat_request_channel(
 	struct snd_pcm_substream *substream)
 {
 	struct dmaengine_pcm *pcm = soc_platform_to_pcm(rtd->platform);
+	struct snd_dmaengine_dai_dma_data *dma_data;
+
+	dma_data = snd_soc_dai_get_dma_data(rtd->cpu_dai, substream);
 
 	if ((pcm->flags & SND_DMAENGINE_PCM_FLAG_HALF_DUPLEX) && pcm->chan[0])
 		return pcm->chan[0];
@@ -134,22 +179,42 @@ static struct dma_chan *dmaengine_pcm_compat_request_channel(
 		return pcm->config->compat_request_channel(rtd, substream);
 
 	return snd_dmaengine_pcm_request_channel(pcm->config->compat_filter_fn,
-		snd_soc_dai_get_dma_data(rtd->cpu_dai, substream));
+						 dma_data->filter_data);
 }
 
 static int dmaengine_pcm_new(struct snd_soc_pcm_runtime *rtd)
 {
 	struct dmaengine_pcm *pcm = soc_platform_to_pcm(rtd->platform);
 	const struct snd_dmaengine_pcm_config *config = pcm->config;
+	struct device *dev = rtd->platform->dev;
+	struct snd_dmaengine_dai_dma_data *dma_data;
 	struct snd_pcm_substream *substream;
+	size_t prealloc_buffer_size;
+	size_t max_buffer_size;
 	unsigned int i;
 	int ret;
 
+	if (config && config->prealloc_buffer_size) {
+		prealloc_buffer_size = config->prealloc_buffer_size;
+		max_buffer_size = config->pcm_hardware->buffer_bytes_max;
+	} else {
+		prealloc_buffer_size = 512 * 1024;
+		max_buffer_size = SIZE_MAX;
+	}
+
+
 	for (i = SNDRV_PCM_STREAM_PLAYBACK; i <= SNDRV_PCM_STREAM_CAPTURE; i++) {
 		substream = rtd->pcm->streams[i].substream;
 		if (!substream)
 			continue;
 
+		dma_data = snd_soc_dai_get_dma_data(rtd->cpu_dai, substream);
+
+		if (!pcm->chan[i] &&
+		    (pcm->flags & SND_DMAENGINE_PCM_FLAG_CUSTOM_CHANNEL_NAME))
+			pcm->chan[i] = dma_request_slave_channel(dev,
+				dma_data->chan_name);
+
 		if (!pcm->chan[i] && (pcm->flags & SND_DMAENGINE_PCM_FLAG_COMPAT)) {
 			pcm->chan[i] = dmaengine_pcm_compat_request_channel(rtd,
 				substream);
@@ -165,8 +230,8 @@ static int dmaengine_pcm_new(struct snd_soc_pcm_runtime *rtd)
 		ret = snd_pcm_lib_preallocate_pages(substream,
 				SNDRV_DMA_TYPE_DEV,
 				dmaengine_dma_dev(pcm, substream),
-				config->prealloc_buffer_size,
-				config->pcm_hardware->buffer_bytes_max);
+				prealloc_buffer_size,
+				max_buffer_size);
 		if (ret)
 			goto err_free;
 	}
@@ -222,7 +287,9 @@ static void dmaengine_pcm_request_chan_of(struct dmaengine_pcm *pcm,
 {
 	unsigned int i;
 
-	if ((pcm->flags & SND_DMAENGINE_PCM_FLAG_NO_DT) || !dev->of_node)
+	if ((pcm->flags & (SND_DMAENGINE_PCM_FLAG_NO_DT |
+			   SND_DMAENGINE_PCM_FLAG_CUSTOM_CHANNEL_NAME)) ||
+	    !dev->of_node)
 		return;
 
 	if (pcm->flags & SND_DMAENGINE_PCM_FLAG_HALF_DUPLEX) {