sound/soc/rockchip/rockchip_pcm.c

   1 /*
   2  * Copyright (c) 2018 Rockchip Electronics Co. Ltd.
   3  *
   4  * This program is free software; you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License version 2 as
   6  * published by the Free Software Foundation.
   7  */
   8
   9 #include <linux/device.h>
  10 #include <linux/init.h>
  11 #include <linux/module.h>
  12
  13 #include <sound/core.h>
  14 #include <sound/pcm.h>
  15 #include <sound/soc.h>
  16 #include <sound/dmaengine_pcm.h>
  17
  18 #include "rockchip_pcm.h"
  19
  20 static const struct snd_pcm_hardware snd_rockchip_hardware = {
  21         .info                   = SNDRV_PCM_INFO_MMAP |
  22                                   SNDRV_PCM_INFO_MMAP_VALID |
  23                                   SNDRV_PCM_INFO_PAUSE |
  24                                   SNDRV_PCM_INFO_RESUME |
  25                                   SNDRV_PCM_INFO_INTERLEAVED,
  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 rk_dmaengine_pcm_config = {
  35         .pcm_hardware = &snd_rockchip_hardware,
  36         .prepare_slave_config = snd_dmaengine_pcm_prepare_slave_config,
  37         .prealloc_buffer_size = 32 * 1024,
  38 };
  39
  40 int rockchip_pcm_platform_register(struct device *dev)
  41 {
  42         return devm_snd_dmaengine_pcm_register(dev, &rk_dmaengine_pcm_config,
  43                 SND_DMAENGINE_PCM_FLAG_COMPAT);
  44 }
  45 EXPORT_SYMBOL_GPL(rockchip_pcm_platform_register);
  46
  47 MODULE_LICENSE("GPL v2");