ASoC: imx: Use generic dmaengine PCM

Use the generic dmaengine PCM driver instead of a custom implementation.
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Tested-by: Shawn Guo <shawn.guo@linaro.org>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

sound/soc/fsl/Kconfig

@@ -118,7 +118,7 @@ config SND_SOC_IMX_PCM_FIQ
 
 config SND_SOC_IMX_PCM_DMA
 	bool
-	select SND_SOC_DMAENGINE_PCM
+	select SND_SOC_GENERIC_DMAENGINE_PCM
 	select SND_SOC_IMX_PCM
 
 config SND_SOC_IMX_AUDMUX

sound/soc/fsl/imx-pcm-dma.c

@@ -11,22 +11,12 @@
  *  Free Software Foundation;  either version 2 of the  License, or (at your
  *  option) any later version.
  */
-#include <linux/clk.h>
-#include <linux/delay.h>
-#include <linux/device.h>
-#include <linux/dma-mapping.h>
-#include <linux/init.h>
-#include <linux/interrupt.h>
-#include <linux/module.h>
 #include <linux/platform_device.h>
-#include <linux/slab.h>
 #include <linux/dmaengine.h>
 #include <linux/types.h>
 
 #include <sound/core.h>
-#include <sound/initval.h>
 #include <sound/pcm.h>
-#include <sound/pcm_params.h>
 #include <sound/soc.h>
 #include <sound/dmaengine_pcm.h>
 
@@ -44,32 +34,7 @@ static bool filter(struct dma_chan *chan, void *param)
 	return true;
 }
 
-static int snd_imx_pcm_hw_params(struct snd_pcm_substream *substream,
-				struct snd_pcm_hw_params *params)
-{
-	struct snd_soc_pcm_runtime *rtd = substream->private_data;
-	struct dma_chan *chan = snd_dmaengine_pcm_get_chan(substream);
-	struct dma_slave_config slave_config;
-	int ret;
-
-	ret = snd_hwparams_to_dma_slave_config(substream, params, &slave_config);
-	if (ret)
-		return ret;
-
-	snd_dmaengine_pcm_set_config_from_dai_data(substream,
-			snd_soc_dai_get_dma_data(rtd->cpu_dai, substream),
-			&slave_config);
-
-	ret = dmaengine_slave_config(chan, &slave_config);
-	if (ret)
-		return ret;
-
-	snd_pcm_set_runtime_buffer(substream, &substream->dma_buffer);
-
-	return 0;
-}
-
-static struct snd_pcm_hardware snd_imx_hardware = {
+static const struct snd_pcm_hardware imx_pcm_hardware = {
 	.info = SNDRV_PCM_INFO_INTERLEAVED |
 		SNDRV_PCM_INFO_BLOCK_TRANSFER |
 		SNDRV_PCM_INFO_MMAP |
@@ -88,33 +53,22 @@ static struct snd_pcm_hardware snd_imx_hardware = {
 	.fifo_size = 0,
 };
 
-static int snd_imx_open(struct snd_pcm_substream *substream)
-{
-	struct snd_soc_pcm_runtime *rtd = substream->private_data;
-
-	snd_soc_set_runtime_hwparams(substream, &snd_imx_hardware);
-
-	return snd_dmaengine_pcm_open(substream, filter,
-		snd_soc_dai_get_dma_data(rtd->cpu_dai, substream));
-}
-
-static struct snd_pcm_ops imx_pcm_ops = {
-	.open		= snd_imx_open,
-	.close		= snd_dmaengine_pcm_close_release_chan,
-	.ioctl		= snd_pcm_lib_ioctl,
-	.hw_params	= snd_imx_pcm_hw_params,
-	.trigger	= snd_dmaengine_pcm_trigger,
-	.pointer	= snd_dmaengine_pcm_pointer_no_residue,
-	.mmap		= snd_imx_pcm_mmap,
-};
-
-static struct snd_soc_platform_driver imx_soc_platform_mx2 = {
-	.ops		= &imx_pcm_ops,
-	.pcm_new	= imx_pcm_new,
-	.pcm_free	= imx_pcm_free,
+static const struct snd_dmaengine_pcm_config imx_dmaengine_pcm_config = {
+	.pcm_hardware = &imx_pcm_hardware,
+	.prepare_slave_config = snd_dmaengine_pcm_prepare_slave_config,
+	.compat_filter_fn = filter,
+	.prealloc_buffer_size = IMX_SSI_DMABUF_SIZE,
 };
 
 int imx_pcm_dma_init(struct platform_device *pdev)
 {
-	return snd_soc_register_platform(&pdev->dev, &imx_soc_platform_mx2);
+	return snd_dmaengine_pcm_register(&pdev->dev, &imx_dmaengine_pcm_config,
+		SND_DMAENGINE_PCM_FLAG_NO_RESIDUE |
+		SND_DMAENGINE_PCM_FLAG_NO_DT |
+		SND_DMAENGINE_PCM_FLAG_COMPAT);
+}
+
+void imx_pcm_dma_exit(struct platform_device *pdev)
+{
+	snd_dmaengine_pcm_unregister(&pdev->dev);
 }

sound/soc/fsl/imx-pcm.c

@@ -114,7 +114,11 @@ static int imx_pcm_probe(struct platform_device *pdev)
 
 static int imx_pcm_remove(struct platform_device *pdev)
 {
+	if (strcmp(pdev->id_entry->name, "imx-fiq-pcm-audio") == 0)
 		snd_soc_unregister_platform(&pdev->dev);
+	else
+		imx_pcm_dma_exit(pdev);
+
 	return 0;
 }
 

sound/soc/fsl/imx-pcm.h

@@ -39,11 +39,16 @@ void imx_pcm_free(struct snd_pcm *pcm);
 
 #ifdef CONFIG_SND_SOC_IMX_PCM_DMA
 int imx_pcm_dma_init(struct platform_device *pdev);
+void imx_pcm_dma_exit(struct platform_device *pdev);
 #else
 static inline int imx_pcm_dma_init(struct platform_device *pdev)
 {
 	return -ENODEV;
 }
+
+static inline void imx_pcm_dma_exit(struct platform_device *pdev)
+{
+}
 #endif
 
 #ifdef CONFIG_SND_SOC_IMX_PCM_FIQ