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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>
This commit is contained in:
Stephen Warren 2013-12-10 12:34:46 -07:00 committed by Mark Brown
parent 6f2032a189
commit a8983d4b0a
3 changed files with 22 additions and 17 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

12
sound/soc/cirrus/ep93xx-ac97.c
View File

@ -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;
}

14
sound/soc/cirrus/ep93xx-i2s.c
View File

@ -21,6 +21,7 @@
#include <linux/io.h>
#include <sound/core.h>
#include <sound/dmaengine_pcm.h>
#include <sound/pcm.h>
#include <sound/pcm_params.h>
#include <sound/initval.h>
@ -63,6 +64,8 @@ struct ep93xx_i2s_info {
struct clk *sclk;
struct clk *lrclk;
void __iomem *regs;
struct snd_dmaengine_dai_dma_data dma_params_rx;
struct snd_dmaengine_dai_dma_data dma_params_tx;
};
static struct ep93xx_dma_data ep93xx_i2s_dma_data[] = {
@ -142,8 +145,15 @@ static void ep93xx_i2s_disable(struct ep93xx_i2s_info *info, int stream)
static int ep93xx_i2s_dai_probe(struct snd_soc_dai *dai)
{
dai->playback_dma_data = &ep93xx_i2s_dma_data[SNDRV_PCM_STREAM_PLAYBACK];
dai->capture_dma_data = &ep93xx_i2s_dma_data[SNDRV_PCM_STREAM_CAPTURE];
struct ep93xx_i2s_info *info = snd_soc_dai_get_drvdata(dai);
info->dma_params_tx.filter_data =
&ep93xx_i2s_dma_data[SNDRV_PCM_STREAM_PLAYBACK];
info->dma_params_rx.filter_data =
&ep93xx_i2s_dma_data[SNDRV_PCM_STREAM_CAPTURE];
dai->playback_dma_data = &info->dma_params_tx;
dai->capture_dma_data = &info->dma_params_rx;
return 0;
}

13
sound/soc/cirrus/ep93xx-pcm.c
View File

@ -59,22 +59,9 @@ static bool ep93xx_pcm_dma_filter(struct dma_chan *chan, void *filter_param)
return false;
}
static struct dma_chan *ep93xx_compat_request_channel(
struct snd_soc_pcm_runtime *rtd,
struct snd_pcm_substream *substream)
{
struct snd_dmaengine_dai_dma_data *dma_data;
dma_data = snd_soc_dai_get_dma_data(rtd->cpu_dai, substream);
return snd_dmaengine_pcm_request_channel(ep93xx_pcm_dma_filter,
dma_data);
}
static const struct snd_dmaengine_pcm_config ep93xx_dmaengine_pcm_config = {
.pcm_hardware = &ep93xx_pcm_hardware,
.compat_filter_fn = ep93xx_pcm_dma_filter,
.compat_request_channel = ep93xx_compat_request_channel,
.prealloc_buffer_size = 131072,
};