root/sound/soc/samsung/dmaengine.c

DEFINITIONS

1. samsung_asoc_dma_platform_register

   1 // SPDX-License-Identifier: GPL-2.0
   2 //
   3 // dmaengine.c - Samsung dmaengine wrapper
   4 //
   5 // Author: Mark Brown <broonie@linaro.org>
   6 // Copyright 2013 Linaro
   7 
   8 #include <linux/module.h>
   9 #include <sound/core.h>
  10 #include <sound/pcm.h>
  11 #include <sound/pcm_params.h>
  12 #include <sound/dmaengine_pcm.h>
  13 #include <sound/soc.h>
  14 
  15 #include "dma.h"
  16 
  17 int samsung_asoc_dma_platform_register(struct device *dev, dma_filter_fn filter,
  18                                        const char *tx, const char *rx,
  19                                        struct device *dma_dev)
  20 {
  21         struct snd_dmaengine_pcm_config *pcm_conf;
  22 
  23         pcm_conf = devm_kzalloc(dev, sizeof(*pcm_conf), GFP_KERNEL);
  24         if (!pcm_conf)
  25                 return -ENOMEM;
  26 
  27         pcm_conf->prepare_slave_config = snd_dmaengine_pcm_prepare_slave_config;
  28         pcm_conf->compat_filter_fn = filter;
  29         pcm_conf->dma_dev = dma_dev;
  30 
  31         pcm_conf->chan_names[SNDRV_PCM_STREAM_PLAYBACK] = tx;
  32         pcm_conf->chan_names[SNDRV_PCM_STREAM_CAPTURE] = rx;
  33 
  34         return devm_snd_dmaengine_pcm_register(dev, pcm_conf,
  35                                 SND_DMAENGINE_PCM_FLAG_COMPAT);
  36 }
  37 EXPORT_SYMBOL_GPL(samsung_asoc_dma_platform_register);
  38 
  39 MODULE_AUTHOR("Mark Brown <broonie@linaro.org>");
  40 MODULE_DESCRIPTION("Samsung dmaengine ASoC driver");
  41 MODULE_LICENSE("GPL");