root/sound/soc/mxs/mxs-pcm.c

DEFINITIONS

1. mxs_pcm_platform_register

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  * Copyright (C) 2011 Freescale Semiconductor, Inc. All Rights Reserved.
   4  *
   5  * Based on sound/soc/imx/imx-pcm-dma-mx2.c
   6  */
   7 
   8 #include <linux/device.h>
   9 #include <linux/init.h>
  10 #include <linux/module.h>
  11 
  12 #include <sound/core.h>
  13 #include <sound/pcm.h>
  14 #include <sound/soc.h>
  15 #include <sound/dmaengine_pcm.h>
  16 
  17 #include "mxs-pcm.h"
  18 
  19 static const struct snd_pcm_hardware snd_mxs_hardware = {
  20         .info                   = SNDRV_PCM_INFO_MMAP |
  21                                   SNDRV_PCM_INFO_MMAP_VALID |
  22                                   SNDRV_PCM_INFO_PAUSE |
  23                                   SNDRV_PCM_INFO_RESUME |
  24                                   SNDRV_PCM_INFO_INTERLEAVED |
  25                                   SNDRV_PCM_INFO_HALF_DUPLEX,
  26         .period_bytes_min       = 32,
  27         .period_bytes_max       = 8192,
  28         .periods_min            = 1,
  29         .periods_max            = 52,
  30         .buffer_bytes_max       = 64 * 1024,
  31         .fifo_size              = 32,
  32 };
  33 
  34 static const struct snd_dmaengine_pcm_config mxs_dmaengine_pcm_config = {
  35         .pcm_hardware = &snd_mxs_hardware,
  36         .prealloc_buffer_size = 64 * 1024,
  37 };
  38 
  39 int mxs_pcm_platform_register(struct device *dev)
  40 {
  41         return devm_snd_dmaengine_pcm_register(dev, &mxs_dmaengine_pcm_config,
  42                 SND_DMAENGINE_PCM_FLAG_HALF_DUPLEX);
  43 }
  44 EXPORT_SYMBOL_GPL(mxs_pcm_platform_register);
  45 
  46 MODULE_LICENSE("GPL");