blob: ad750f446d88a34746935c932ea7350e70135063 [file] [log] [blame]
/*
* ALSA SoC codec for HDMI encoder drivers
* Copyright (C) 2015 Texas Instruments Incorporated - http://www.ti.com/
* Author: Jyri Sarha <jsarha@ti.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.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*/
#include <linux/hdmi-notifier.h>
#include <linux/module.h>
#include <linux/notifier.h>
#include <linux/string.h>
#include <sound/core.h>
#include <sound/jack.h>
#include <sound/pcm.h>
#include <sound/pcm_params.h>
#include <sound/soc.h>
#include <sound/pcm_drm_eld.h>
#include <sound/hdmi-codec.h>
#include <sound/pcm_iec958.h>
#include <drm/drm_crtc.h> /* This is only to get MAX_ELD_BYTES */
struct hdmi_codec_priv {
struct hdmi_codec_pdata hcd;
struct snd_soc_dai_driver *daidrv;
struct snd_soc_jack *jack;
struct hdmi_codec_daifmt daifmt[2];
struct mutex current_stream_lock;
struct snd_pcm_substream *current_stream;
struct snd_pcm_hw_constraint_list ratec;
struct mutex eld_lock;
uint8_t eld[MAX_ELD_BYTES];
struct device *dev;
struct notifier_block nb;
unsigned int jack_status;
};
static const struct snd_soc_dapm_widget hdmi_widgets[] = {
SND_SOC_DAPM_OUTPUT("TX"),
};
static const struct snd_soc_dapm_route hdmi_routes[] = {
{ "TX", NULL, "Playback" },
};
enum {
DAI_ID_I2S = 0,
DAI_ID_SPDIF,
};
static int hdmi_eld_ctl_info(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_info *uinfo)
{
struct snd_soc_component *component = snd_kcontrol_chip(kcontrol);
struct hdmi_codec_priv *hcp = snd_soc_component_get_drvdata(component);
uinfo->type = SNDRV_CTL_ELEM_TYPE_BYTES;
uinfo->count = sizeof(hcp->eld);
return 0;
}
static int hdmi_eld_ctl_get(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol)
{
struct snd_soc_component *component = snd_kcontrol_chip(kcontrol);
struct hdmi_codec_priv *hcp = snd_soc_component_get_drvdata(component);
memcpy(ucontrol->value.bytes.data, hcp->eld, sizeof(hcp->eld));
return 0;
}
static const struct snd_kcontrol_new hdmi_controls[] = {
{
.access = SNDRV_CTL_ELEM_ACCESS_READ |
SNDRV_CTL_ELEM_ACCESS_VOLATILE,
.iface = SNDRV_CTL_ELEM_IFACE_PCM,
.name = "ELD",
.info = hdmi_eld_ctl_info,
.get = hdmi_eld_ctl_get,
},
};
static int hdmi_codec_new_stream(struct snd_pcm_substream *substream,
struct snd_soc_dai *dai)
{
struct hdmi_codec_priv *hcp = snd_soc_dai_get_drvdata(dai);
int ret = 0;
mutex_lock(&hcp->current_stream_lock);
if (!hcp->current_stream) {
hcp->current_stream = substream;
} else if (hcp->current_stream != substream) {
dev_err(dai->dev, "Only one simultaneous stream supported!\n");
ret = -EINVAL;
}
mutex_unlock(&hcp->current_stream_lock);
return ret;
}
static int hdmi_codec_startup(struct snd_pcm_substream *substream,
struct snd_soc_dai *dai)
{
struct hdmi_codec_priv *hcp = snd_soc_dai_get_drvdata(dai);
int ret;
dev_dbg(dai->dev, "%s()\n", __func__);
ret = hdmi_codec_new_stream(substream, dai);
if (ret)
return ret;
if (hcp->hcd.ops->audio_startup) {
ret = hcp->hcd.ops->audio_startup(dai->dev->parent, hcp->hcd.data);
if (ret) {
mutex_lock(&hcp->current_stream_lock);
hcp->current_stream = NULL;
mutex_unlock(&hcp->current_stream_lock);
return ret;
}
}
if (hcp->hcd.ops->get_eld) {
mutex_lock(&hcp->eld_lock);
ret = hcp->hcd.ops->get_eld(dai->dev->parent, hcp->hcd.data,
hcp->eld, sizeof(hcp->eld));
if (!ret)
ret = snd_pcm_hw_constraint_eld(substream->runtime,
hcp->eld);
mutex_unlock(&hcp->eld_lock);
}
return ret;
}
static void hdmi_codec_shutdown(struct snd_pcm_substream *substream,
struct snd_soc_dai *dai)
{
struct hdmi_codec_priv *hcp = snd_soc_dai_get_drvdata(dai);
dev_dbg(dai->dev, "%s()\n", __func__);
WARN_ON(hcp->current_stream != substream);
hcp->hcd.ops->audio_shutdown(dai->dev->parent, hcp->hcd.data);
mutex_lock(&hcp->current_stream_lock);
hcp->current_stream = NULL;
mutex_unlock(&hcp->current_stream_lock);
}
static int hdmi_codec_hw_params(struct snd_pcm_substream *substream,
struct snd_pcm_hw_params *params,
struct snd_soc_dai *dai)
{
struct hdmi_codec_priv *hcp = snd_soc_dai_get_drvdata(dai);
struct hdmi_codec_params hp = {
.iec = {
.status = { 0 },
.subcode = { 0 },
.pad = 0,
.dig_subframe = { 0 },
}
};
int ret;
dev_dbg(dai->dev, "%s() width %d rate %d channels %d\n", __func__,
params_width(params), params_rate(params),
params_channels(params));
if (params_width(params) > 24)
params->msbits = 24;
ret = snd_pcm_create_iec958_consumer_hw_params(params, hp.iec.status,
sizeof(hp.iec.status));
if (ret < 0) {
dev_err(dai->dev, "Creating IEC958 channel status failed %d\n",
ret);
return ret;
}
ret = hdmi_codec_new_stream(substream, dai);
if (ret)
return ret;
hdmi_audio_infoframe_init(&hp.cea);
hp.cea.channels = params_channels(params);
hp.cea.coding_type = HDMI_AUDIO_CODING_TYPE_STREAM;
hp.cea.sample_size = HDMI_AUDIO_SAMPLE_SIZE_STREAM;
hp.cea.sample_frequency = HDMI_AUDIO_SAMPLE_FREQUENCY_STREAM;
hp.sample_width = params_width(params);
hp.sample_rate = params_rate(params);
hp.channels = params_channels(params);
return hcp->hcd.ops->hw_params(dai->dev->parent, hcp->hcd.data,
&hcp->daifmt[dai->id], &hp);
}
static int hdmi_codec_set_fmt(struct snd_soc_dai *dai,
unsigned int fmt)
{
struct hdmi_codec_priv *hcp = snd_soc_dai_get_drvdata(dai);
struct hdmi_codec_daifmt cf = { 0 };
int ret = 0;
dev_dbg(dai->dev, "%s()\n", __func__);
if (dai->id == DAI_ID_SPDIF) {
cf.fmt = HDMI_SPDIF;
} else {
switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
case SND_SOC_DAIFMT_CBM_CFM:
cf.bit_clk_master = 1;
cf.frame_clk_master = 1;
break;
case SND_SOC_DAIFMT_CBS_CFM:
cf.frame_clk_master = 1;
break;
case SND_SOC_DAIFMT_CBM_CFS:
cf.bit_clk_master = 1;
break;
case SND_SOC_DAIFMT_CBS_CFS:
break;
default:
return -EINVAL;
}
switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
case SND_SOC_DAIFMT_NB_NF:
break;
case SND_SOC_DAIFMT_NB_IF:
cf.frame_clk_inv = 1;
break;
case SND_SOC_DAIFMT_IB_NF:
cf.bit_clk_inv = 1;
break;
case SND_SOC_DAIFMT_IB_IF:
cf.frame_clk_inv = 1;
cf.bit_clk_inv = 1;
break;
}
switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
case SND_SOC_DAIFMT_I2S:
cf.fmt = HDMI_I2S;
break;
case SND_SOC_DAIFMT_DSP_A:
cf.fmt = HDMI_DSP_A;
break;
case SND_SOC_DAIFMT_DSP_B:
cf.fmt = HDMI_DSP_B;
break;
case SND_SOC_DAIFMT_RIGHT_J:
cf.fmt = HDMI_RIGHT_J;
break;
case SND_SOC_DAIFMT_LEFT_J:
cf.fmt = HDMI_LEFT_J;
break;
case SND_SOC_DAIFMT_AC97:
cf.fmt = HDMI_AC97;
break;
default:
dev_err(dai->dev, "Invalid DAI interface format\n");
return -EINVAL;
}
}
hcp->daifmt[dai->id] = cf;
return ret;
}
static int hdmi_codec_digital_mute(struct snd_soc_dai *dai, int mute)
{
struct hdmi_codec_priv *hcp = snd_soc_dai_get_drvdata(dai);
dev_dbg(dai->dev, "%s()\n", __func__);
if (hcp->hcd.ops->digital_mute)
return hcp->hcd.ops->digital_mute(dai->dev->parent,
hcp->hcd.data, mute);
return 0;
}
static const struct snd_soc_dai_ops hdmi_dai_ops = {
.startup = hdmi_codec_startup,
.shutdown = hdmi_codec_shutdown,
.hw_params = hdmi_codec_hw_params,
.set_fmt = hdmi_codec_set_fmt,
.digital_mute = hdmi_codec_digital_mute,
};
#define HDMI_RATES (SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_44100 |\
SNDRV_PCM_RATE_48000 | SNDRV_PCM_RATE_88200 |\
SNDRV_PCM_RATE_96000 | SNDRV_PCM_RATE_176400 |\
SNDRV_PCM_RATE_192000)
#define SPDIF_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S16_BE |\
SNDRV_PCM_FMTBIT_S20_3LE | SNDRV_PCM_FMTBIT_S20_3BE |\
SNDRV_PCM_FMTBIT_S24_3LE | SNDRV_PCM_FMTBIT_S24_3BE |\
SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S24_BE)
/*
* This list is only for formats allowed on the I2S bus. So there is
* some formats listed that are not supported by HDMI interface. For
* instance allowing the 32-bit formats enables 24-precision with CPU
* DAIs that do not support 24-bit formats. If the extra formats cause
* problems, we should add the video side driver an option to disable
* them.
*/
#define I2S_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S16_BE |\
SNDRV_PCM_FMTBIT_S20_3LE | SNDRV_PCM_FMTBIT_S20_3BE |\
SNDRV_PCM_FMTBIT_S24_3LE | SNDRV_PCM_FMTBIT_S24_3BE |\
SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S24_BE |\
SNDRV_PCM_FMTBIT_S32_LE | SNDRV_PCM_FMTBIT_S32_BE)
static struct snd_soc_dai_driver hdmi_i2s_dai = {
.name = "i2s-hifi",
.id = DAI_ID_I2S,
.playback = {
.stream_name = "Playback",
.channels_min = 2,
.channels_max = 8,
.rates = HDMI_RATES,
.formats = I2S_FORMATS,
.sig_bits = 24,
},
.ops = &hdmi_dai_ops,
};
static const struct snd_soc_dai_driver hdmi_spdif_dai = {
.name = "spdif-hifi",
.id = DAI_ID_SPDIF,
.playback = {
.stream_name = "Playback",
.channels_min = 2,
.channels_max = 2,
.rates = HDMI_RATES,
.formats = SPDIF_FORMATS,
},
.ops = &hdmi_dai_ops,
};
static struct snd_soc_codec_driver hdmi_codec = {
.controls = hdmi_controls,
.num_controls = ARRAY_SIZE(hdmi_controls),
.dapm_widgets = hdmi_widgets,
.num_dapm_widgets = ARRAY_SIZE(hdmi_widgets),
.dapm_routes = hdmi_routes,
.num_dapm_routes = ARRAY_SIZE(hdmi_routes),
};
static void hdmi_codec_jack_report(struct hdmi_codec_priv *hcp,
unsigned int jack_status)
{
if (!hcp->jack)
return;
if (jack_status != hcp->jack_status) {
snd_soc_jack_report(hcp->jack, jack_status, SND_JACK_LINEOUT);
hcp->jack_status = jack_status;
}
}
static int hdmi_codec_notify(struct notifier_block *nb, unsigned long event,
void *data)
{
struct hdmi_codec_priv *hcp = container_of(nb, struct hdmi_codec_priv,
nb);
union hdmi_event *event_block = data;
if (hcp->dev->parent != event_block->base.source)
return NOTIFY_OK;
if (!hcp->jack)
return NOTIFY_OK;
switch (event) {
case HDMI_CONNECTED:
hdmi_codec_jack_report(hcp, SND_JACK_LINEOUT);
break;
case HDMI_DISCONNECTED:
hdmi_codec_jack_report(hcp, 0);
break;
case HDMI_NEW_ELD:
hdmi_codec_jack_report(hcp, SND_JACK_LINEOUT);
mutex_lock(&hcp->eld_lock);
memcpy(hcp->eld, event_block->eld.eld, sizeof(hcp->eld));
mutex_unlock(&hcp->eld_lock);
break;
}
return NOTIFY_OK;
}
int hdmi_codec_set_jack_detect(struct snd_soc_codec *codec,
struct snd_soc_jack *jack)
{
struct hdmi_codec_priv *hcp = snd_soc_codec_get_drvdata(codec);
hcp->jack = jack;
hcp->nb.notifier_call = hdmi_codec_notify;
hdmi_register_notifier(&hcp->nb);
return 0;
}
EXPORT_SYMBOL_GPL(hdmi_codec_set_jack_detect);
static int hdmi_codec_probe(struct platform_device *pdev)
{
struct hdmi_codec_pdata *hcd = pdev->dev.platform_data;
struct device *dev = &pdev->dev;
struct hdmi_codec_priv *hcp;
int dai_count, i = 0;
int ret;
dev_dbg(dev, "%s()\n", __func__);
if (!hcd) {
dev_err(dev, "%s: No plalform data\n", __func__);
return -EINVAL;
}
dai_count = hcd->i2s + hcd->spdif;
if (dai_count < 1 || !hcd->ops || !hcd->ops->hw_params ||
!hcd->ops->audio_shutdown) {
dev_err(dev, "%s: Invalid parameters\n", __func__);
return -EINVAL;
}
hcp = devm_kzalloc(dev, sizeof(*hcp), GFP_KERNEL);
if (!hcp)
return -ENOMEM;
hcp->hcd = *hcd;
mutex_init(&hcp->current_stream_lock);
mutex_init(&hcp->eld_lock);
hcp->daidrv = devm_kzalloc(dev, dai_count * sizeof(*hcp->daidrv),
GFP_KERNEL);
if (!hcp->daidrv)
return -ENOMEM;
if (hcd->i2s) {
hcp->daidrv[i] = hdmi_i2s_dai;
hcp->daidrv[i].playback.channels_max =
hcd->max_i2s_channels;
i++;
}
if (hcd->spdif)
hcp->daidrv[i] = hdmi_spdif_dai;
dev_set_drvdata(dev, hcp);
ret = snd_soc_register_codec(dev, &hdmi_codec, hcp->daidrv,
dai_count);
if (ret) {
dev_err(dev, "%s: snd_soc_register_codec() failed (%d)\n",
__func__, ret);
return ret;
}
hcp->dev = dev;
return 0;
}
static int hdmi_codec_remove(struct platform_device *pdev)
{
struct hdmi_codec_priv *hcp = platform_get_drvdata(pdev);
hdmi_unregister_notifier(&hcp->nb);
snd_soc_unregister_codec(&pdev->dev);
return 0;
}
static struct platform_driver hdmi_codec_driver = {
.driver = {
.name = HDMI_CODEC_DRV_NAME,
},
.probe = hdmi_codec_probe,
.remove = hdmi_codec_remove,
};
module_platform_driver(hdmi_codec_driver);
MODULE_AUTHOR("Jyri Sarha <jsarha@ti.com>");
MODULE_DESCRIPTION("HDMI Audio Codec Driver");
MODULE_LICENSE("GPL");
MODULE_ALIAS("platform:" HDMI_CODEC_DRV_NAME);