1
2
3
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
17static 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
31static 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
37int 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}
42EXPORT_SYMBOL_GPL(rockchip_pcm_platform_register);
43
44MODULE_LICENSE("GPL v2");
45