ASoC: ep93xx: remove custom DMA alloc compat function

ep93xx_compat_request_channel() 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 ep93xx 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>

1 files changed, 10 insertions, 2 deletions

diff --git a/sound/soc/cirrus/ep93xx-ac97.c b/sound/soc/cirrus/ep93xx-ac97.c
index cc5583da5380..f30dadf85b99 100644
--- a/sound/soc/cirrus/ep93xx-ac97.c
+++ b/sound/soc/cirrus/ep93xx-ac97.c
@@ -19,6 +19,7 @@
 #include <linux/slab.h>
 
 #include <sound/core.h>
+#include <sound/dmaengine_pcm.h>
 #include <sound/ac97_codec.h>
 #include <sound/soc.h>
 
@@ -97,6 +98,8 @@ struct ep93xx_ac97_info {
         struct device           *dev;
         void __iomem            *regs;
         struct completion       done;
+        struct snd_dmaengine_dai_dma_data dma_params_rx;
+        struct snd_dmaengine_dai_dma_data dma_params_tx;
 };
 
 /* currently ALSA only supports a single AC97 device */
@@ -317,8 +320,13 @@ static int ep93xx_ac97_trigger(struct snd_pcm_substream *substream,
 
 static int ep93xx_ac97_dai_probe(struct snd_soc_dai *dai)
 {
-        dai->playback_dma_data = &ep93xx_ac97_pcm_out;
-        dai->capture_dma_data = &ep93xx_ac97_pcm_in;
+        struct ep93xx_ac97_info *info = snd_soc_dai_get_drvdata(dai);
+
+        info->dma_params_tx.filter_data = &ep93xx_ac97_pcm_out;
+        info->dma_params_rx.filter_data = &ep93xx_ac97_pcm_in;
+
+        dai->playback_dma_data = &info->dma_params_tx;
+        dai->capture_dma_data = &info->dma_params_rx;
 
         return 0;
 }