From f382acbe163a6faebd7cafe57800306970e241d4 Mon Sep 17 00:00:00 2001
From: Lee Jones <lee.jones@linaro.org>
Date: Thu, 19 Dec 2013 15:55:05 +0000
Subject: [PATCH] ASoC: ux500: Store DMA data in the DAI differently in the
 pdata and DT case

In this patch we do two things. Firstly, instead of open coding the
store of DMA data in to the DAI for later use, we use the API provided.
Secondly we create and store similar DMA data for the DT case, only
this time we use 'struct snd_dmaengine_dai_dma_data' which is provided
by the core for this very reason.

Acked-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Mark Brown <broonie@linaro.org>
---
 sound/soc/ux500/ux500_msp_dai.c | 42 +++++++++++++++++++++++++++++++--
 1 file changed, 40 insertions(+), 2 deletions(-)

diff --git a/sound/soc/ux500/ux500_msp_dai.c b/sound/soc/ux500/ux500_msp_dai.c
index bc042cce115f..f4d607a72668 100644
--- a/sound/soc/ux500/ux500_msp_dai.c
+++ b/sound/soc/ux500/ux500_msp_dai.c
@@ -17,12 +17,14 @@
 #include <linux/bitops.h>
 #include <linux/platform_device.h>
 #include <linux/clk.h>
+#include <linux/of.h>
 #include <linux/regulator/consumer.h>
 #include <linux/mfd/dbx500-prcmu.h>
 #include <linux/platform_data/asoc-ux500-msp.h>
 
 #include <sound/soc.h>
 #include <sound/soc-dai.h>
+#include <sound/dmaengine_pcm.h>
 
 #include "ux500_msp_i2s.h"
 #include "ux500_msp_dai.h"
@@ -654,16 +656,52 @@ static int ux500_msp_dai_trigger(struct snd_pcm_substream *substream,
 	return ret;
 }
 
+static int ux500_msp_dai_of_probe(struct snd_soc_dai *dai)
+{
+	struct ux500_msp_i2s_drvdata *drvdata = dev_get_drvdata(dai->dev);
+	struct snd_dmaengine_dai_dma_data *playback_dma_data;
+	struct snd_dmaengine_dai_dma_data *capture_dma_data;
+
+	playback_dma_data = devm_kzalloc(dai->dev,
+					 sizeof(*playback_dma_data),
+					 GFP_KERNEL);
+	if (!playback_dma_data)
+		return -ENOMEM;
+
+	capture_dma_data = devm_kzalloc(dai->dev,
+					sizeof(*capture_dma_data),
+					GFP_KERNEL);
+	if (!capture_dma_data)
+		return -ENOMEM;
+
+	playback_dma_data->addr = drvdata->msp->playback_dma_data.tx_rx_addr;
+	capture_dma_data->addr = drvdata->msp->capture_dma_data.tx_rx_addr;
+
+	playback_dma_data->maxburst = 4;
+	capture_dma_data->maxburst = 4;
+
+	snd_soc_dai_init_dma_data(dai, playback_dma_data, capture_dma_data);
+
+	return 0;
+}
+
 static int ux500_msp_dai_probe(struct snd_soc_dai *dai)
 {
 	struct ux500_msp_i2s_drvdata *drvdata = dev_get_drvdata(dai->dev);
+	struct msp_i2s_platform_data *pdata = dai->dev->platform_data;
+	int ret;
 
-	dai->playback_dma_data = &drvdata->msp->playback_dma_data;
-	dai->capture_dma_data = &drvdata->msp->capture_dma_data;
+	if (!pdata) {
+		ret = ux500_msp_dai_of_probe(dai);
+		return ret;
+	}
 
 	drvdata->msp->playback_dma_data.data_size = drvdata->slot_width;
 	drvdata->msp->capture_dma_data.data_size = drvdata->slot_width;
 
+	snd_soc_dai_init_dma_data(dai,
+				  &drvdata->msp->playback_dma_data,
+				  &drvdata->msp->capture_dma_data);
 	return 0;
 }