ASoC: SPEAr: remove custom DMA alloc compat function

spear_pcm_request_chan() is almost identical to
dmaengine_pcm_compat_request_channel(), with the exception that the
latter:

a) Assumes that the DAI DMA data is a struct snd_dmaengine_dai_dma_data
   pointer rather than some custom type.

b) dma_data->filter_data rather than dma_data should be passed to
   snd_dmaengine_pcm_request_channel() as the filter data.

Make minor changes to the SPEAr DAI drivers so that those two conditions
are met. This allows removal of the custom .compat_request_channel().

Signed-off-by: Stephen Warren <swarren@nvidia.com>
Signed-off-by: Mark Brown <broonie@linaro.org>

4 files changed, 24 insertions, 21 deletions

diff --git a/sound/soc/spear/spdif_in.c b/sound/soc/spear/spdif_in.c
index 4627110f3441..4ab442a63d7e 100644
--- a/sound/soc/spear/spdif_in.c
+++ b/sound/soc/spear/spdif_in.c
@@ -18,6 +18,7 @@
 #include <linux/ioport.h>
 #include <linux/module.h>
 #include <linux/platform_device.h>
+#include <sound/dmaengine_pcm.h>
 #include <sound/pcm.h>
 #include <sound/pcm_params.h>
 #include <sound/soc.h>
@@ -38,6 +39,8 @@ struct spdif_in_dev {
         struct device *dev;
         void (*reset_perip)(void);
         int irq;
+        struct snd_dmaengine_dai_dma_data dma_params_rx;
+        struct snd_dmaengine_pcm_config config;
 };
 
 static void spdif_in_configure(struct spdif_in_dev *host)
@@ -54,7 +57,8 @@ static int spdif_in_dai_probe(struct snd_soc_dai *dai)
 {
         struct spdif_in_dev *host = snd_soc_dai_get_drvdata(dai);
 
-        dai->capture_dma_data = &host->dma_params;
+        host->dma_params_rx.filter_data = &host->dma_params;
+        dai->capture_dma_data = &host->dma_params_rx;
 
         return 0;
 }
@@ -245,7 +249,6 @@ static int spdif_in_probe(struct platform_device *pdev)
         host->dma_params.addr = res_fifo->start;
         host->dma_params.max_burst = 16;
         host->dma_params.addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES;
-        host->dma_params.filter = pdata->filter;
         host->reset_perip = pdata->reset_perip;
 
         host->dev = &pdev->dev;
@@ -263,7 +266,8 @@ static int spdif_in_probe(struct platform_device *pdev)
         if (ret)
                 return ret;
 
-        return devm_spear_pcm_platform_register(&pdev->dev);
+        return devm_spear_pcm_platform_register(&pdev->dev, &host->config,
+                                                pdata->filter);
 }
 
 static struct platform_driver spdif_in_driver = {
diff --git a/sound/soc/spear/spdif_out.c b/sound/soc/spear/spdif_out.c
index 731a1e0cfeaa..fe99f461aff0 100644
--- a/sound/soc/spear/spdif_out.c
+++ b/sound/soc/spear/spdif_out.c
@@ -18,6 +18,7 @@
 #include <linux/ioport.h>
 #include <linux/module.h>
 #include <linux/platform_device.h>
+#include <sound/dmaengine_pcm.h>
 #include <sound/soc.h>
 #include <sound/spear_dma.h>
 #include <sound/spear_spdif.h>
@@ -36,6 +37,8 @@ struct spdif_out_dev {
         struct spdif_out_params saved_params;
         u32 running;
         void __iomem *io_base;
+        struct snd_dmaengine_dai_dma_data dma_params_tx;
+        struct snd_dmaengine_pcm_config config;
 };
 
 static void spdif_out_configure(struct spdif_out_dev *host)
@@ -245,7 +248,8 @@ static int spdif_soc_dai_probe(struct snd_soc_dai *dai)
 {
         struct spdif_out_dev *host = snd_soc_dai_get_drvdata(dai);
 
-        dai->playback_dma_data = &host->dma_params;
+        host->dma_params_tx.filter_data = &host->dma_params;
+        dai->playback_dma_data = &host->dma_params_tx;
 
         return snd_soc_add_dai_controls(dai, spdif_out_controls,
                                 ARRAY_SIZE(spdif_out_controls));
@@ -304,7 +308,6 @@ static int spdif_out_probe(struct platform_device *pdev)
         host->dma_params.addr = res->start + SPDIF_OUT_FIFO_DATA;
         host->dma_params.max_burst = 16;
         host->dma_params.addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES;
-        host->dma_params.filter = pdata->filter;
 
         dev_set_drvdata(&pdev->dev, host);
 
@@ -313,7 +316,8 @@ static int spdif_out_probe(struct platform_device *pdev)
         if (ret)
                 return ret;
 
-        return devm_spear_pcm_platform_register(&pdev->dev);
+        return devm_spear_pcm_platform_register(&pdev->dev, &host->config,
+                                                pdata->filter);
 }
 
 #ifdef CONFIG_PM
diff --git a/sound/soc/spear/spear_pcm.c b/sound/soc/spear/spear_pcm.c
index f288724961da..0e5a8f35d0ad 100644
--- a/sound/soc/spear/spear_pcm.c
+++ b/sound/soc/spear/spear_pcm.c
@@ -32,26 +32,19 @@ static const struct snd_pcm_hardware spear_pcm_hardware = {
         .fifo_size = 0, /* fifo size in bytes */
 };
 
-static struct dma_chan *spear_pcm_request_chan(struct snd_soc_pcm_runtime *rtd,
-        struct snd_pcm_substream *substream)
-{
-        struct spear_dma_data *dma_data;
-
-        dma_data = snd_soc_dai_get_dma_data(rtd->cpu_dai, substream);
-
-        return snd_dmaengine_pcm_request_channel(dma_data->filter, dma_data);
-}
-
 static const struct snd_dmaengine_pcm_config spear_dmaengine_pcm_config = {
         .pcm_hardware = &spear_pcm_hardware,
-        .compat_request_channel = spear_pcm_request_chan,
         .prealloc_buffer_size = 16 * 1024,
 };
 
-int devm_spear_pcm_platform_register(struct device *dev)
+int devm_spear_pcm_platform_register(struct device *dev,
+                        struct snd_dmaengine_pcm_config *config,
+                        bool (*filter)(struct dma_chan *chan, void *slave))
 {
-        return devm_snd_dmaengine_pcm_register(dev,
-                &spear_dmaengine_pcm_config,
+        *config = spear_dmaengine_pcm_config;
+        config->compat_filter_fn = filter;
+
+        return snd_dmaengine_pcm_register(dev, config,
                 SND_DMAENGINE_PCM_FLAG_NO_DT |
                 SND_DMAENGINE_PCM_FLAG_COMPAT);
 }
diff --git a/sound/soc/spear/spear_pcm.h b/sound/soc/spear/spear_pcm.h
index 631e2aa1fb33..9b0ca62d6f02 100644
--- a/sound/soc/spear/spear_pcm.h
+++ b/sound/soc/spear/spear_pcm.h
@@ -17,6 +17,8 @@
 #ifndef __SPEAR_PCM_H__
 #define __SPEAR_PCM_H__
 
-int devm_spear_pcm_platform_register(struct device *dev);
+int devm_spear_pcm_platform_register(struct device *dev,
+                        struct snd_dmaengine_pcm_config *config,
+                        bool (*filter)(struct dma_chan *chan, void *slave));
 
 #endif