164 lines
3.8 KiB
C
164 lines
3.8 KiB
C
/*
|
|
* dw-hdmi-i2s-audio.c
|
|
*
|
|
* Copyright (c) 2017 Renesas Solutions Corp.
|
|
* Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License version 2 as
|
|
* published by the Free Software Foundation.
|
|
*/
|
|
#include <drm/bridge/dw_hdmi.h>
|
|
|
|
#include <sound/hdmi-codec.h>
|
|
|
|
#include "dw-hdmi.h"
|
|
#include "dw-hdmi-audio.h"
|
|
|
|
#define DRIVER_NAME "dw-hdmi-i2s-audio"
|
|
|
|
static inline void hdmi_write(struct dw_hdmi_i2s_audio_data *audio,
|
|
u8 val, int offset)
|
|
{
|
|
struct dw_hdmi *hdmi = audio->hdmi;
|
|
|
|
audio->write(hdmi, val, offset);
|
|
}
|
|
|
|
static inline u8 hdmi_read(struct dw_hdmi_i2s_audio_data *audio, int offset)
|
|
{
|
|
struct dw_hdmi *hdmi = audio->hdmi;
|
|
|
|
return audio->read(hdmi, offset);
|
|
}
|
|
|
|
static int dw_hdmi_i2s_hw_params(struct device *dev, void *data,
|
|
struct hdmi_codec_daifmt *fmt,
|
|
struct hdmi_codec_params *hparms)
|
|
{
|
|
struct dw_hdmi_i2s_audio_data *audio = data;
|
|
struct dw_hdmi *hdmi = audio->hdmi;
|
|
u8 conf0 = 0;
|
|
u8 conf1 = 0;
|
|
u8 inputclkfs = 0;
|
|
|
|
/* it cares I2S only */
|
|
if ((fmt->fmt != HDMI_I2S) ||
|
|
(fmt->bit_clk_master | fmt->frame_clk_master)) {
|
|
dev_err(dev, "unsupported format/settings\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
inputclkfs = HDMI_AUD_INPUTCLKFS_64FS;
|
|
conf0 = HDMI_AUD_CONF0_I2S_ALL_ENABLE;
|
|
|
|
switch (hparms->sample_width) {
|
|
case 16:
|
|
conf1 = HDMI_AUD_CONF1_WIDTH_16;
|
|
break;
|
|
case 24:
|
|
case 32:
|
|
conf1 = HDMI_AUD_CONF1_WIDTH_24;
|
|
break;
|
|
}
|
|
|
|
dw_hdmi_set_sample_rate(hdmi, hparms->sample_rate);
|
|
|
|
hdmi_write(audio, inputclkfs, HDMI_AUD_INPUTCLKFS);
|
|
hdmi_write(audio, conf0, HDMI_AUD_CONF0);
|
|
hdmi_write(audio, conf1, HDMI_AUD_CONF1);
|
|
|
|
dw_hdmi_audio_enable(hdmi);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void dw_hdmi_i2s_audio_shutdown(struct device *dev, void *data)
|
|
{
|
|
struct dw_hdmi_i2s_audio_data *audio = data;
|
|
struct dw_hdmi *hdmi = audio->hdmi;
|
|
|
|
dw_hdmi_audio_disable(hdmi);
|
|
|
|
hdmi_write(audio, HDMI_AUD_CONF0_SW_RESET, HDMI_AUD_CONF0);
|
|
}
|
|
|
|
static int dw_hdmi_i2s_get_dai_id(struct snd_soc_component *component,
|
|
struct device_node *endpoint)
|
|
{
|
|
struct of_endpoint of_ep;
|
|
int ret;
|
|
|
|
ret = of_graph_parse_endpoint(endpoint, &of_ep);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
/*
|
|
* HDMI sound should be located as reg = <2>
|
|
* Then, it is sound port 0
|
|
*/
|
|
if (of_ep.port == 2)
|
|
return 0;
|
|
|
|
return -EINVAL;
|
|
}
|
|
|
|
static struct hdmi_codec_ops dw_hdmi_i2s_ops = {
|
|
.hw_params = dw_hdmi_i2s_hw_params,
|
|
.audio_shutdown = dw_hdmi_i2s_audio_shutdown,
|
|
.get_dai_id = dw_hdmi_i2s_get_dai_id,
|
|
};
|
|
|
|
static int snd_dw_hdmi_probe(struct platform_device *pdev)
|
|
{
|
|
struct dw_hdmi_i2s_audio_data *audio = pdev->dev.platform_data;
|
|
struct platform_device_info pdevinfo;
|
|
struct hdmi_codec_pdata pdata;
|
|
struct platform_device *platform;
|
|
|
|
pdata.ops = &dw_hdmi_i2s_ops;
|
|
pdata.i2s = 1;
|
|
pdata.max_i2s_channels = 6;
|
|
pdata.data = audio;
|
|
|
|
memset(&pdevinfo, 0, sizeof(pdevinfo));
|
|
pdevinfo.parent = pdev->dev.parent;
|
|
pdevinfo.id = PLATFORM_DEVID_AUTO;
|
|
pdevinfo.name = HDMI_CODEC_DRV_NAME;
|
|
pdevinfo.data = &pdata;
|
|
pdevinfo.size_data = sizeof(pdata);
|
|
pdevinfo.dma_mask = DMA_BIT_MASK(32);
|
|
|
|
platform = platform_device_register_full(&pdevinfo);
|
|
if (IS_ERR(platform))
|
|
return PTR_ERR(platform);
|
|
|
|
dev_set_drvdata(&pdev->dev, platform);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int snd_dw_hdmi_remove(struct platform_device *pdev)
|
|
{
|
|
struct platform_device *platform = dev_get_drvdata(&pdev->dev);
|
|
|
|
platform_device_unregister(platform);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static struct platform_driver snd_dw_hdmi_driver = {
|
|
.probe = snd_dw_hdmi_probe,
|
|
.remove = snd_dw_hdmi_remove,
|
|
.driver = {
|
|
.name = DRIVER_NAME,
|
|
.owner = THIS_MODULE,
|
|
},
|
|
};
|
|
module_platform_driver(snd_dw_hdmi_driver);
|
|
|
|
MODULE_AUTHOR("Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>");
|
|
MODULE_DESCRIPTION("Synopsis Designware HDMI I2S ALSA SoC interface");
|
|
MODULE_LICENSE("GPL v2");
|
|
MODULE_ALIAS("platform:" DRIVER_NAME);
|