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// SPDX-License-Identifier: GPL-2.0
// Copyright 2017-2020 NXP
#include <linux/module.h>
#include <linux/of_platform.h>
#include <sound/jack.h>
#include <sound/pcm_params.h>
#include <sound/hdmi-codec.h>
#include "fsl_sai.h"
/**
* struct cpu_priv - CPU private data
* @sysclk_freq: SYSCLK rates for set_sysclk()
* @sysclk_dir: SYSCLK directions for set_sysclk()
* @sysclk_id: SYSCLK ids for set_sysclk()
* @slot_width: Slot width of each frame
*
* Note: [1] for tx and [0] for rx
*/
struct cpu_priv {
unsigned long sysclk_freq[2];
u32 sysclk_dir[2];
u32 sysclk_id[2];
u32 slot_width;
};
struct imx_hdmi_data {
struct snd_soc_dai_link dai;
struct snd_soc_card card;
struct snd_soc_jack hdmi_jack;
struct snd_soc_jack_pin hdmi_jack_pin;
struct cpu_priv cpu_priv;
u32 dai_fmt;
};
static int imx_hdmi_hw_params(struct snd_pcm_substream *substream,
struct snd_pcm_hw_params *params)
{
struct snd_soc_pcm_runtime *rtd = substream->private_data;
struct imx_hdmi_data *data = snd_soc_card_get_drvdata(rtd->card);
bool tx = substream->stream == SNDRV_PCM_STREAM_PLAYBACK;
struct snd_soc_dai *cpu_dai = asoc_rtd_to_cpu(rtd, 0);
struct snd_soc_card *card = rtd->card;
struct device *dev = card->dev;
u32 slot_width = data->cpu_priv.slot_width;
int ret;
/* MCLK always is (256 or 192) * rate. */
ret = snd_soc_dai_set_sysclk(cpu_dai, data->cpu_priv.sysclk_id[tx],
8 * slot_width * params_rate(params),
tx ? SND_SOC_CLOCK_OUT : SND_SOC_CLOCK_IN);
if (ret && ret != -ENOTSUPP) {
dev_err(dev, "failed to set cpu sysclk: %d\n", ret);
return ret;
}
ret = snd_soc_dai_set_tdm_slot(cpu_dai, 0, 0, 2, slot_width);
if (ret && ret != -ENOTSUPP) {
dev_err(dev, "failed to set cpu dai tdm slot: %d\n", ret);
return ret;
}
return 0;
}
static struct snd_soc_ops imx_hdmi_ops = {
.hw_params = imx_hdmi_hw_params,
};
static const struct snd_soc_dapm_widget imx_hdmi_widgets[] = {
SND_SOC_DAPM_LINE("HDMI Jack", NULL),
};
static int imx_hdmi_init(struct snd_soc_pcm_runtime *rtd)
{
struct snd_soc_card *card = rtd->card;
struct snd_soc_dai *codec_dai = asoc_rtd_to_codec(rtd, 0);
struct snd_soc_component *component = codec_dai->component;
struct imx_hdmi_data *data = snd_soc_card_get_drvdata(card);
int ret;
data->hdmi_jack_pin.pin = "HDMI Jack";
data->hdmi_jack_pin.mask = SND_JACK_LINEOUT;
/* enable jack detection */
ret = snd_soc_card_jack_new(card, "HDMI Jack", SND_JACK_LINEOUT,
&data->hdmi_jack, &data->hdmi_jack_pin, 1);
if (ret) {
dev_err(card->dev, "Can't new HDMI Jack %d\n", ret);
return ret;
}
ret = snd_soc_component_set_jack(component, &data->hdmi_jack, NULL);
if (ret && ret != -EOPNOTSUPP) {
dev_err(card->dev, "Can't set HDMI Jack %d\n", ret);
return ret;
}
return 0;
};
static int imx_hdmi_probe(struct platform_device *pdev)
{
struct device_node *np = pdev->dev.of_node;
bool hdmi_out = of_property_read_bool(np, "hdmi-out");
bool hdmi_in = of_property_read_bool(np, "hdmi-in");
struct snd_soc_dai_link_component *dlc;
struct platform_device *cpu_pdev;
struct device_node *cpu_np;
struct imx_hdmi_data *data;
int ret;
dlc = devm_kzalloc(&pdev->dev, 3 * sizeof(*dlc), GFP_KERNEL);
if (!dlc)
return -ENOMEM;
cpu_np = of_parse_phandle(np, "audio-cpu", 0);
if (!cpu_np) {
dev_err(&pdev->dev, "cpu dai phandle missing or invalid\n");
ret = -EINVAL;
goto fail;
}
cpu_pdev = of_find_device_by_node(cpu_np);
if (!cpu_pdev) {
dev_err(&pdev->dev, "failed to find SAI platform device\n");
ret = -EINVAL;
goto fail;
}
data = devm_kzalloc(&pdev->dev, sizeof(*data), GFP_KERNEL);
if (!data) {
ret = -ENOMEM;
goto fail;
}
data->dai.cpus = &dlc[0];
data->dai.num_cpus = 1;
data->dai.platforms = &dlc[1];
data->dai.num_platforms = 1;
data->dai.codecs = &dlc[2];
data->dai.num_codecs = 1;
data->dai.name = "i.MX HDMI";
data->dai.stream_name = "i.MX HDMI";
data->dai.cpus->dai_name = dev_name(&cpu_pdev->dev);
data->dai.platforms->of_node = cpu_np;
data->dai.ops = &imx_hdmi_ops;
data->dai.playback_only = true;
data->dai.capture_only = false;
data->dai.init = imx_hdmi_init;
if (of_node_name_eq(cpu_np, "sai")) {
data->cpu_priv.sysclk_id[1] = FSL_SAI_CLK_MAST1;
data->cpu_priv.sysclk_id[0] = FSL_SAI_CLK_MAST1;
}
if (of_device_is_compatible(np, "fsl,imx-audio-sii902x")) {
data->dai_fmt = SND_SOC_DAIFMT_LEFT_J;
data->cpu_priv.slot_width = 24;
} else {
data->dai_fmt = SND_SOC_DAIFMT_I2S;
data->cpu_priv.slot_width = 32;
}
if ((hdmi_out && hdmi_in) || (!hdmi_out && !hdmi_in)) {
dev_err(&pdev->dev, "Invalid HDMI DAI link\n");
goto fail;
}
if (hdmi_out) {
data->dai.playback_only = true;
data->dai.capture_only = false;
data->dai.codecs->dai_name = "i2s-hifi";
data->dai.codecs->name = "hdmi-audio-codec.1";
data->dai.dai_fmt = data->dai_fmt |
SND_SOC_DAIFMT_NB_NF |
SND_SOC_DAIFMT_CBS_CFS;
}
if (hdmi_in) {
data->dai.playback_only = false;
data->dai.capture_only = true;
data->dai.codecs->dai_name = "i2s-hifi";
data->dai.codecs->name = "hdmi-audio-codec.2";
data->dai.dai_fmt = data->dai_fmt |
SND_SOC_DAIFMT_NB_NF |
SND_SOC_DAIFMT_CBM_CFM;
}
data->card.dapm_widgets = imx_hdmi_widgets;
data->card.num_dapm_widgets = ARRAY_SIZE(imx_hdmi_widgets);
data->card.dev = &pdev->dev;
data->card.owner = THIS_MODULE;
ret = snd_soc_of_parse_card_name(&data->card, "model");
if (ret)
goto fail;
data->card.num_links = 1;
data->card.dai_link = &data->dai;
snd_soc_card_set_drvdata(&data->card, data);
ret = devm_snd_soc_register_card(&pdev->dev, &data->card);
if (ret) {
dev_err(&pdev->dev, "snd_soc_register_card failed (%d)\n", ret);
goto fail;
}
fail:
if (cpu_np)
of_node_put(cpu_np);
return ret;
}
static const struct of_device_id imx_hdmi_dt_ids[] = {
{ .compatible = "fsl,imx-audio-hdmi", },
{ .compatible = "fsl,imx-audio-sii902x", },
{ /* sentinel */ }
};
MODULE_DEVICE_TABLE(of, imx_hdmi_dt_ids);
static struct platform_driver imx_hdmi_driver = {
.driver = {
.name = "imx-hdmi",
.owner = THIS_MODULE,
.pm = &snd_soc_pm_ops,
.of_match_table = imx_hdmi_dt_ids,
},
.probe = imx_hdmi_probe,
};
module_platform_driver(imx_hdmi_driver);
MODULE_AUTHOR("Freescale Semiconductor, Inc.");
MODULE_DESCRIPTION("Freescale i.MX hdmi audio ASoC machine driver");
MODULE_LICENSE("GPL v2");
MODULE_ALIAS("platform:imx-hdmi");
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