sound/soc/rockchip/rockchip_pcm.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * Copyright (c) 2018 Rockchip Electronics Co. Ltd.
   4  */
   5
   6 #include <linux/device.h>
   7 #include <linux/init.h>
   8 #include <linux/module.h>
   9
  10 #include <sound/core.h>
  11 #include <sound/pcm.h>
  12 #include <sound/soc.h>
  13 #include <sound/dmaengine_pcm.h>
  14
  15 #include "rockchip_pcm.h"
  16
  17 static const struct snd_pcm_hardware snd_rockchip_hardware = {
  18         .info                   = SNDRV_PCM_INFO_MMAP |
  19                                   SNDRV_PCM_INFO_MMAP_VALID |
  20                                   SNDRV_PCM_INFO_PAUSE |
  21                                   SNDRV_PCM_INFO_RESUME |
  22                                   SNDRV_PCM_INFO_INTERLEAVED,
  23         .period_bytes_min       = 32,
  24         .period_bytes_max       = 8192,
  25         .periods_min            = 1,
  26         .periods_max            = 52,
  27         .buffer_bytes_max       = 64 * 1024,
  28         .fifo_size              = 32,
  29 };
  30
  31 static const struct snd_dmaengine_pcm_config rk_dmaengine_pcm_config = {
  32         .pcm_hardware = &snd_rockchip_hardware,
  33         .prepare_slave_config = snd_dmaengine_pcm_prepare_slave_config,
  34         .prealloc_buffer_size = 32 * 1024,
  35 };
  36
  37 int rockchip_pcm_platform_register(struct device *dev)
  38 {
  39         return devm_snd_dmaengine_pcm_register(dev, &rk_dmaengine_pcm_config,
  40                 SND_DMAENGINE_PCM_FLAG_COMPAT);
  41 }
  42 EXPORT_SYMBOL_GPL(rockchip_pcm_platform_register);
  43
  44 MODULE_LICENSE("GPL v2");