--- zzzz-none-000/linux-3.10.107/sound/soc/atmel/atmel-pcm-dma.c	2017-06-27 09:49:32.000000000 +0000
+++ scorpion-7490-727/linux-3.10.107/sound/soc/atmel/atmel-pcm-dma.c	2021-02-04 17:41:59.000000000 +0000
@@ -50,12 +50,11 @@
 				  SNDRV_PCM_INFO_INTERLEAVED |
 				  SNDRV_PCM_INFO_RESUME |
 				  SNDRV_PCM_INFO_PAUSE,
-	.formats		= SNDRV_PCM_FMTBIT_S16_LE,
 	.period_bytes_min	= 256,		/* lighting DMA overhead */
 	.period_bytes_max	= 2 * 0xffff,	/* if 2 bytes format */
 	.periods_min		= 8,
 	.periods_max		= 1024,		/* no limit */
-	.buffer_bytes_max	= ATMEL_SSC_DMABUF_SIZE,
+	.buffer_bytes_max	= 512 * 1024,
 };
 
 /**
@@ -81,9 +80,7 @@
 
 		/* stop RX and capture: will be enabled again at restart */
 		ssc_writex(prtd->ssc->regs, SSC_CR, prtd->mask->ssc_disable);
-		snd_pcm_stream_lock(substream);
-		snd_pcm_stop(substream, SNDRV_PCM_STATE_XRUN);
-		snd_pcm_stream_unlock(substream);
+		snd_pcm_stop_xrun(substream);
 
 		/* now drain RHR and read status to remove xrun condition */
 		ssc_readx(prtd->ssc->regs, SSC_RHR);
@@ -91,138 +88,49 @@
 	}
 }
 
-/*--------------------------------------------------------------------------*\
- * DMAENGINE operations
-\*--------------------------------------------------------------------------*/
-static bool filter(struct dma_chan *chan, void *slave)
-{
-	struct at_dma_slave *sl = slave;
-
-	if (sl->dma_dev == chan->device->dev) {
-		chan->private = sl;
-		return true;
-	} else {
-		return false;
-	}
-}
-
 static int atmel_pcm_configure_dma(struct snd_pcm_substream *substream,
-	struct snd_pcm_hw_params *params, struct atmel_pcm_dma_params *prtd)
-{
-	struct ssc_device *ssc;
-	struct dma_chan *dma_chan;
-	struct dma_slave_config slave_config;
-	int ret;
-
-	ssc = prtd->ssc;
-
-	ret = snd_hwparams_to_dma_slave_config(substream, params,
-			&slave_config);
-	if (ret) {
-		pr_err("atmel-pcm: hwparams to dma slave configure failed\n");
-		return ret;
-	}
-
-	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
-		slave_config.dst_addr = (dma_addr_t)ssc->phybase + SSC_THR;
-		slave_config.dst_maxburst = 1;
-	} else {
-		slave_config.src_addr = (dma_addr_t)ssc->phybase + SSC_RHR;
-		slave_config.src_maxburst = 1;
-	}
-
-	dma_chan = snd_dmaengine_pcm_get_chan(substream);
-	if (dmaengine_slave_config(dma_chan, &slave_config)) {
-		pr_err("atmel-pcm: failed to configure dma channel\n");
-		ret = -EBUSY;
-		return ret;
-	}
-
-	return 0;
-}
-
-static int atmel_pcm_hw_params(struct snd_pcm_substream *substream,
-	struct snd_pcm_hw_params *params)
+	struct snd_pcm_hw_params *params, struct dma_slave_config *slave_config)
 {
 	struct snd_soc_pcm_runtime *rtd = substream->private_data;
 	struct atmel_pcm_dma_params *prtd;
 	struct ssc_device *ssc;
-	struct at_dma_slave *sdata = NULL;
 	int ret;
 
-	snd_pcm_set_runtime_buffer(substream, &substream->dma_buffer);
-
 	prtd = snd_soc_dai_get_dma_data(rtd->cpu_dai, substream);
 	ssc = prtd->ssc;
-	if (ssc->pdev)
-		sdata = ssc->pdev->dev.platform_data;
-
-	ret = snd_dmaengine_pcm_open_request_chan(substream, filter, sdata);
-	if (ret) {
-		pr_err("atmel-pcm: dmaengine pcm open failed\n");
-		return -EINVAL;
-	}
 
-	ret = atmel_pcm_configure_dma(substream, params, prtd);
+	ret = snd_hwparams_to_dma_slave_config(substream, params, slave_config);
 	if (ret) {
-		pr_err("atmel-pcm: failed to configure dmai\n");
-		goto err;
+		pr_err("atmel-pcm: hwparams to dma slave configure failed\n");
+		return ret;
 	}
 
-	prtd->dma_intr_handler = atmel_pcm_dma_irq;
+	slave_config->dst_addr = ssc->phybase + SSC_THR;
+	slave_config->dst_maxburst = 1;
 
-	return 0;
-err:
-	snd_dmaengine_pcm_close_release_chan(substream);
-	return ret;
-}
+	slave_config->src_addr = ssc->phybase + SSC_RHR;
+	slave_config->src_maxburst = 1;
 
-static int atmel_pcm_dma_prepare(struct snd_pcm_substream *substream)
-{
-	struct snd_soc_pcm_runtime *rtd = substream->private_data;
-	struct atmel_pcm_dma_params *prtd;
-
-	prtd = snd_soc_dai_get_dma_data(rtd->cpu_dai, substream);
-
-	ssc_writex(prtd->ssc->regs, SSC_IER, prtd->mask->ssc_error);
-	ssc_writex(prtd->ssc->regs, SSC_CR, prtd->mask->ssc_enable);
-
-	return 0;
-}
-
-static int atmel_pcm_open(struct snd_pcm_substream *substream)
-{
-	snd_soc_set_runtime_hwparams(substream, &atmel_pcm_dma_hardware);
+	prtd->dma_intr_handler = atmel_pcm_dma_irq;
 
 	return 0;
 }
 
-static struct snd_pcm_ops atmel_pcm_ops = {
-	.open		= atmel_pcm_open,
-	.close		= snd_dmaengine_pcm_close_release_chan,
-	.ioctl		= snd_pcm_lib_ioctl,
-	.hw_params	= atmel_pcm_hw_params,
-	.prepare	= atmel_pcm_dma_prepare,
-	.trigger	= snd_dmaengine_pcm_trigger,
-	.pointer	= snd_dmaengine_pcm_pointer_no_residue,
-	.mmap		= atmel_pcm_mmap,
-};
-
-static struct snd_soc_platform_driver atmel_soc_platform = {
-	.ops		= &atmel_pcm_ops,
-	.pcm_new	= atmel_pcm_new,
-	.pcm_free	= atmel_pcm_free,
+static const struct snd_dmaengine_pcm_config atmel_dmaengine_pcm_config = {
+	.prepare_slave_config = atmel_pcm_configure_dma,
+	.pcm_hardware = &atmel_pcm_dma_hardware,
+	.prealloc_buffer_size = 64 * 1024,
 };
 
 int atmel_pcm_dma_platform_register(struct device *dev)
 {
-	return snd_soc_register_platform(dev, &atmel_soc_platform);
+	return snd_dmaengine_pcm_register(dev, &atmel_dmaengine_pcm_config, 0);
 }
 EXPORT_SYMBOL(atmel_pcm_dma_platform_register);
 
 void atmel_pcm_dma_platform_unregister(struct device *dev)
 {
-	snd_soc_unregister_platform(dev);
+	snd_dmaengine_pcm_unregister(dev);
 }
 EXPORT_SYMBOL(atmel_pcm_dma_platform_unregister);