--- zzzz-none-000/linux-3.10.107/sound/soc/blackfin/bf5xx-i2s-pcm.c	2017-06-27 09:49:32.000000000 +0000
+++ scorpion-7490-727/linux-3.10.107/sound/soc/blackfin/bf5xx-i2s-pcm.c	2021-02-04 17:41:59.000000000 +0000
@@ -39,8 +39,8 @@
 
 #include <asm/dma.h>
 
-#include "bf5xx-i2s-pcm.h"
 #include "bf5xx-sport.h"
+#include "bf5xx-i2s-pcm.h"
 
 static void bf5xx_dma_irq(void *data)
 {
@@ -50,12 +50,8 @@
 
 static const struct snd_pcm_hardware bf5xx_pcm_hardware = {
 	.info			= SNDRV_PCM_INFO_INTERLEAVED |
-				   SNDRV_PCM_INFO_MMAP |
 				   SNDRV_PCM_INFO_MMAP_VALID |
 				   SNDRV_PCM_INFO_BLOCK_TRANSFER,
-	.formats		= SNDRV_PCM_FMTBIT_S16_LE |
-				   SNDRV_PCM_FMTBIT_S24_LE |
-				   SNDRV_PCM_FMTBIT_S32_LE,
 	.period_bytes_min	= 32,
 	.period_bytes_max	= 0x10000,
 	.periods_min		= 1,
@@ -67,10 +63,16 @@
 static int bf5xx_pcm_hw_params(struct snd_pcm_substream *substream,
 	struct snd_pcm_hw_params *params)
 {
-	size_t size = bf5xx_pcm_hardware.buffer_bytes_max;
-	snd_pcm_lib_malloc_pages(substream, size);
+	struct snd_soc_pcm_runtime *rtd = substream->private_data;
+	unsigned int buffer_size = params_buffer_bytes(params);
+	struct bf5xx_i2s_pcm_data *dma_data;
 
-	return 0;
+	dma_data = snd_soc_dai_get_dma_data(rtd->cpu_dai, substream);
+
+	if (dma_data->tdm_mode)
+		buffer_size = buffer_size / params_channels(params) * 8;
+
+	return snd_pcm_lib_malloc_pages(substream, buffer_size);
 }
 
 static int bf5xx_pcm_hw_free(struct snd_pcm_substream *substream)
@@ -82,9 +84,16 @@
 
 static int bf5xx_pcm_prepare(struct snd_pcm_substream *substream)
 {
+	struct snd_soc_pcm_runtime *rtd = substream->private_data;
 	struct snd_pcm_runtime *runtime = substream->runtime;
 	struct sport_device *sport = runtime->private_data;
 	int period_bytes = frames_to_bytes(runtime, runtime->period_size);
+	struct bf5xx_i2s_pcm_data *dma_data;
+
+	dma_data = snd_soc_dai_get_dma_data(rtd->cpu_dai, substream);
+
+	if (dma_data->tdm_mode)
+		period_bytes = period_bytes / runtime->channels * 8;
 
 	pr_debug("%s enter\n", __func__);
 	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
@@ -131,10 +140,15 @@
 
 static snd_pcm_uframes_t bf5xx_pcm_pointer(struct snd_pcm_substream *substream)
 {
+	struct snd_soc_pcm_runtime *rtd = substream->private_data;
 	struct snd_pcm_runtime *runtime = substream->runtime;
 	struct sport_device *sport = runtime->private_data;
 	unsigned int diff;
 	snd_pcm_uframes_t frames;
+	struct bf5xx_i2s_pcm_data *dma_data;
+
+	dma_data = snd_soc_dai_get_dma_data(rtd->cpu_dai, substream);
+
 	pr_debug("%s enter\n", __func__);
 	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
 		diff = sport_curr_offset_tx(sport);
@@ -151,6 +165,8 @@
 		diff = 0;
 
 	frames = bytes_to_frames(substream->runtime, diff);
+	if (dma_data->tdm_mode)
+		frames = frames * runtime->channels / 8;
 
 	return frames;
 }
@@ -162,11 +178,18 @@
 	struct sport_device *sport_handle = snd_soc_dai_get_drvdata(cpu_dai);
 	struct snd_pcm_runtime *runtime = substream->runtime;
 	struct snd_dma_buffer *buf = &substream->dma_buffer;
+	struct bf5xx_i2s_pcm_data *dma_data;
 	int ret;
 
+	dma_data = snd_soc_dai_get_dma_data(rtd->cpu_dai, substream);
+
 	pr_debug("%s enter\n", __func__);
 
 	snd_soc_set_runtime_hwparams(substream, &bf5xx_pcm_hardware);
+	if (dma_data->tdm_mode)
+		runtime->hw.buffer_bytes_max /= 4;
+	else
+		runtime->hw.info |= SNDRV_PCM_INFO_MMAP;
 
 	ret = snd_pcm_hw_constraint_integer(runtime,
 			SNDRV_PCM_HW_PARAM_PERIODS);
@@ -202,115 +225,133 @@
 	return 0 ;
 }
 
-static struct snd_pcm_ops bf5xx_pcm_i2s_ops = {
-	.open		= bf5xx_pcm_open,
-	.ioctl		= snd_pcm_lib_ioctl,
-	.hw_params	= bf5xx_pcm_hw_params,
-	.hw_free	= bf5xx_pcm_hw_free,
-	.prepare	= bf5xx_pcm_prepare,
-	.trigger	= bf5xx_pcm_trigger,
-	.pointer	= bf5xx_pcm_pointer,
-	.mmap		= bf5xx_pcm_mmap,
-};
-
-static int bf5xx_pcm_preallocate_dma_buffer(struct snd_pcm *pcm, int stream)
+static int bf5xx_pcm_copy(struct snd_pcm_substream *substream, int channel,
+	snd_pcm_uframes_t pos, void *buf, snd_pcm_uframes_t count)
 {
-	struct snd_pcm_substream *substream = pcm->streams[stream].substream;
-	struct snd_dma_buffer *buf = &substream->dma_buffer;
-	size_t size = bf5xx_pcm_hardware.buffer_bytes_max;
+	struct snd_soc_pcm_runtime *rtd = substream->private_data;
+	struct snd_pcm_runtime *runtime = substream->runtime;
+	unsigned int sample_size = runtime->sample_bits / 8;
+	struct bf5xx_i2s_pcm_data *dma_data;
+	unsigned int i;
+	void *src, *dst;
+
+	dma_data = snd_soc_dai_get_dma_data(rtd->cpu_dai, substream);
+
+	if (dma_data->tdm_mode) {
+		if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
+			src = buf;
+			dst = runtime->dma_area;
+			dst += pos * sample_size * 8;
+
+			while (count--) {
+				for (i = 0; i < runtime->channels; i++) {
+					memcpy(dst + dma_data->map[i] *
+						sample_size, src, sample_size);
+					src += sample_size;
+				}
+				dst += 8 * sample_size;
+			}
+		} else {
+			src = runtime->dma_area;
+			src += pos * sample_size * 8;
+			dst = buf;
+
+			while (count--) {
+				for (i = 0; i < runtime->channels; i++) {
+					memcpy(dst, src + dma_data->map[i] *
+						sample_size, sample_size);
+					dst += sample_size;
+				}
+				src += 8 * sample_size;
+			}
+		}
+	} else {
+		if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
+			src = buf;
+			dst = runtime->dma_area;
+			dst += frames_to_bytes(runtime, pos);
+		} else {
+			src = runtime->dma_area;
+			src += frames_to_bytes(runtime, pos);
+			dst = buf;
+		}
 
-	buf->dev.type = SNDRV_DMA_TYPE_DEV;
-	buf->dev.dev = pcm->card->dev;
-	buf->private_data = NULL;
-	buf->area = dma_alloc_coherent(pcm->card->dev, size,
-			&buf->addr, GFP_KERNEL);
-	if (!buf->area) {
-		pr_err("Failed to allocate dma memory - Please increase uncached DMA memory region\n");
-		return -ENOMEM;
+		memcpy(dst, src, frames_to_bytes(runtime, count));
 	}
-	buf->bytes = size;
-
-	pr_debug("%s, area:%p, size:0x%08lx\n", __func__,
-		buf->area, buf->bytes);
 
 	return 0;
 }
 
-static void bf5xx_pcm_free_dma_buffers(struct snd_pcm *pcm)
+static int bf5xx_pcm_silence(struct snd_pcm_substream *substream,
+	int channel, snd_pcm_uframes_t pos, snd_pcm_uframes_t count)
 {
-	struct snd_pcm_substream *substream;
-	struct snd_dma_buffer *buf;
-	int stream;
-
-	for (stream = 0; stream < 2; stream++) {
-		substream = pcm->streams[stream].substream;
-		if (!substream)
-			continue;
-
-		buf = &substream->dma_buffer;
-		if (!buf->area)
-			continue;
-		dma_free_coherent(NULL, buf->bytes, buf->area, 0);
-		buf->area = NULL;
+	struct snd_soc_pcm_runtime *rtd = substream->private_data;
+	struct snd_pcm_runtime *runtime = substream->runtime;
+	unsigned int sample_size = runtime->sample_bits / 8;
+	void *buf = runtime->dma_area;
+	struct bf5xx_i2s_pcm_data *dma_data;
+	unsigned int offset, samples;
+
+	dma_data = snd_soc_dai_get_dma_data(rtd->cpu_dai, substream);
+
+	if (dma_data->tdm_mode) {
+		offset = pos * 8 * sample_size;
+		samples = count * 8;
+	} else {
+		offset = frames_to_bytes(runtime, pos);
+		samples = count * runtime->channels;
 	}
+
+	snd_pcm_format_set_silence(runtime->format, buf + offset, samples);
+
+	return 0;
 }
 
-static u64 bf5xx_pcm_dmamask = DMA_BIT_MASK(32);
+static struct snd_pcm_ops bf5xx_pcm_i2s_ops = {
+	.open		= bf5xx_pcm_open,
+	.ioctl		= snd_pcm_lib_ioctl,
+	.hw_params	= bf5xx_pcm_hw_params,
+	.hw_free	= bf5xx_pcm_hw_free,
+	.prepare	= bf5xx_pcm_prepare,
+	.trigger	= bf5xx_pcm_trigger,
+	.pointer	= bf5xx_pcm_pointer,
+	.mmap		= bf5xx_pcm_mmap,
+	.copy		= bf5xx_pcm_copy,
+	.silence	= bf5xx_pcm_silence,
+};
 
 static int bf5xx_pcm_i2s_new(struct snd_soc_pcm_runtime *rtd)
 {
 	struct snd_card *card = rtd->card->snd_card;
-	struct snd_pcm *pcm = rtd->pcm;
-	int ret = 0;
+	size_t size = bf5xx_pcm_hardware.buffer_bytes_max;
+	int ret;
 
 	pr_debug("%s enter\n", __func__);
-	if (!card->dev->dma_mask)
-		card->dev->dma_mask = &bf5xx_pcm_dmamask;
-	if (!card->dev->coherent_dma_mask)
-		card->dev->coherent_dma_mask = DMA_BIT_MASK(32);
-
-	if (pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream) {
-		ret = bf5xx_pcm_preallocate_dma_buffer(pcm,
-			SNDRV_PCM_STREAM_PLAYBACK);
-		if (ret)
-			goto out;
-	}
+	ret = dma_coerce_mask_and_coherent(card->dev, DMA_BIT_MASK(32));
+	if (ret)
+		return ret;
 
-	if (pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream) {
-		ret = bf5xx_pcm_preallocate_dma_buffer(pcm,
-			SNDRV_PCM_STREAM_CAPTURE);
-		if (ret)
-			goto out;
-	}
- out:
-	return ret;
+	return snd_pcm_lib_preallocate_pages_for_all(rtd->pcm,
+				SNDRV_DMA_TYPE_DEV, card->dev, size, size);
 }
 
 static struct snd_soc_platform_driver bf5xx_i2s_soc_platform = {
 	.ops		= &bf5xx_pcm_i2s_ops,
 	.pcm_new	= bf5xx_pcm_i2s_new,
-	.pcm_free	= bf5xx_pcm_free_dma_buffers,
 };
 
 static int bfin_i2s_soc_platform_probe(struct platform_device *pdev)
 {
-	return snd_soc_register_platform(&pdev->dev, &bf5xx_i2s_soc_platform);
-}
-
-static int bfin_i2s_soc_platform_remove(struct platform_device *pdev)
-{
-	snd_soc_unregister_platform(&pdev->dev);
-	return 0;
+	return devm_snd_soc_register_platform(&pdev->dev,
+					      &bf5xx_i2s_soc_platform);
 }
 
 static struct platform_driver bfin_i2s_pcm_driver = {
 	.driver = {
 		.name = "bfin-i2s-pcm-audio",
-		.owner = THIS_MODULE,
 	},
 
 	.probe = bfin_i2s_soc_platform_probe,
-	.remove = bfin_i2s_soc_platform_remove,
 };
 
 module_platform_driver(bfin_i2s_pcm_driver);