Release 4.7 sound/soc/fsl/imx-pcm-dma.c
/*
* imx-pcm-dma-mx2.c -- ALSA Soc Audio Layer
*
* Copyright 2009 Sascha Hauer <s.hauer@pengutronix.de>
*
* This code is based on code copyrighted by Freescale,
* Liam Girdwood, Javier Martin and probably others.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2 of the License, or (at your
* option) any later version.
*/
#include <linux/platform_device.h>
#include <linux/dmaengine.h>
#include <linux/types.h>
#include <linux/module.h>
#include <sound/core.h>
#include <sound/pcm.h>
#include <sound/soc.h>
#include <sound/dmaengine_pcm.h>
#include "imx-pcm.h"
static bool filter(struct dma_chan *chan, void *param)
{
if (!imx_dma_is_general_purpose(chan))
return false;
chan->private = param;
return true;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| sascha hauer | sascha hauer | 34 | 97.14% | 3 | 75.00% |
| mark brown | mark brown | 1 | 2.86% | 1 | 25.00% |
| Total | 35 | 100.00% | 4 | 100.00% |
static const struct snd_pcm_hardware imx_pcm_hardware = {
.info = SNDRV_PCM_INFO_INTERLEAVED |
SNDRV_PCM_INFO_BLOCK_TRANSFER |
SNDRV_PCM_INFO_MMAP |
SNDRV_PCM_INFO_MMAP_VALID |
SNDRV_PCM_INFO_PAUSE |
SNDRV_PCM_INFO_RESUME,
.buffer_bytes_max = IMX_DEFAULT_DMABUF_SIZE,
.period_bytes_min = 128,
.period_bytes_max = 65535, /* Limited by SDMA engine */
.periods_min = 2,
.periods_max = 255,
.fifo_size = 0,
};
static const struct snd_dmaengine_pcm_config imx_dmaengine_pcm_config = {
.pcm_hardware = &imx_pcm_hardware,
.prepare_slave_config = snd_dmaengine_pcm_prepare_slave_config,
.compat_filter_fn = filter,
.prealloc_buffer_size = IMX_DEFAULT_DMABUF_SIZE,
};
int imx_pcm_dma_init(struct platform_device *pdev, size_t size)
{
struct snd_dmaengine_pcm_config *config;
struct snd_pcm_hardware *pcm_hardware;
config = devm_kzalloc(&pdev->dev,
sizeof(struct snd_dmaengine_pcm_config), GFP_KERNEL);
if (!config)
return -ENOMEM;
*config = imx_dmaengine_pcm_config;
if (size)
config->prealloc_buffer_size = size;
pcm_hardware = devm_kzalloc(&pdev->dev,
sizeof(struct snd_pcm_hardware), GFP_KERNEL);
*pcm_hardware = imx_pcm_hardware;
if (size)
pcm_hardware->buffer_bytes_max = size;
config->pcm_hardware = pcm_hardware;
return devm_snd_dmaengine_pcm_register(&pdev->dev,
config,
SND_DMAENGINE_PCM_FLAG_COMPAT);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| shengjiu wang | shengjiu wang | 86 | 73.50% | 1 | 14.29% |
| liam girdwood | liam girdwood | 13 | 11.11% | 1 | 14.29% |
| julia lawall | julia lawall | 9 | 7.69% | 1 | 14.29% |
| sascha hauer | sascha hauer | 5 | 4.27% | 1 | 14.29% |
| lars-peter clausen | lars-peter clausen | 3 | 2.56% | 2 | 28.57% |
| shawn guo | shawn guo | 1 | 0.85% | 1 | 14.29% |
| Total | 117 | 100.00% | 7 | 100.00% |
EXPORT_SYMBOL_GPL(imx_pcm_dma_init);
MODULE_LICENSE("GPL");
Overall Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| sascha hauer | sascha hauer | 125 | 45.79% | 3 | 20.00% |
| shengjiu wang | shengjiu wang | 88 | 32.23% | 1 | 6.67% |
| lars-peter clausen | lars-peter clausen | 19 | 6.96% | 3 | 20.00% |
| liam girdwood | liam girdwood | 13 | 4.76% | 1 | 6.67% |
| mark brown | mark brown | 9 | 3.30% | 2 | 13.33% |
| julia lawall | julia lawall | 9 | 3.30% | 1 | 6.67% |
| shawn guo | shawn guo | 7 | 2.56% | 3 | 20.00% |
| viresh kumar | viresh kumar | 3 | 1.10% | 1 | 6.67% |
| Total | 273 | 100.00% | 15 | 100.00% |
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