504 lines
12 KiB
C
504 lines
12 KiB
C
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/*
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* ALSA SoC codec for HDMI encoder drivers
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* Copyright (C) 2015 Texas Instruments Incorporated - http://www.ti.com/
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* Author: Jyri Sarha <jsarha@ti.com>
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* version 2 as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*/
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#include <linux/module.h>
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#include <linux/string.h>
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#include <sound/core.h>
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#include <sound/pcm.h>
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#include <sound/pcm_params.h>
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#include <sound/soc.h>
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#include <sound/pcm_drm_eld.h>
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#include <sound/hdmi-codec.h>
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#include <sound/pcm_iec958.h>
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#include <drm/drm_crtc.h> /* This is only to get MAX_ELD_BYTES */
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struct hdmi_device {
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struct device *dev;
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struct list_head list;
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int cnt;
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};
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#define pos_to_hdmi_device(pos) container_of((pos), struct hdmi_device, list)
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LIST_HEAD(hdmi_device_list);
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#define DAI_NAME_SIZE 16
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struct hdmi_codec_priv {
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struct hdmi_codec_pdata hcd;
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struct snd_soc_dai_driver *daidrv;
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struct hdmi_codec_daifmt daifmt[2];
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struct mutex current_stream_lock;
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struct snd_pcm_substream *current_stream;
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struct snd_pcm_hw_constraint_list ratec;
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uint8_t eld[MAX_ELD_BYTES];
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};
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static const struct snd_soc_dapm_widget hdmi_widgets[] = {
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SND_SOC_DAPM_OUTPUT("TX"),
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};
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static const struct snd_soc_dapm_route hdmi_routes[] = {
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{ "TX", NULL, "Playback" },
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};
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enum {
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DAI_ID_I2S = 0,
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DAI_ID_SPDIF,
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};
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static int hdmi_eld_ctl_info(struct snd_kcontrol *kcontrol,
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struct snd_ctl_elem_info *uinfo)
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{
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struct snd_soc_component *component = snd_kcontrol_chip(kcontrol);
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struct hdmi_codec_priv *hcp = snd_soc_component_get_drvdata(component);
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uinfo->type = SNDRV_CTL_ELEM_TYPE_BYTES;
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uinfo->count = sizeof(hcp->eld);
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return 0;
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}
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static int hdmi_eld_ctl_get(struct snd_kcontrol *kcontrol,
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struct snd_ctl_elem_value *ucontrol)
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{
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struct snd_soc_component *component = snd_kcontrol_chip(kcontrol);
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struct hdmi_codec_priv *hcp = snd_soc_component_get_drvdata(component);
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memcpy(ucontrol->value.bytes.data, hcp->eld, sizeof(hcp->eld));
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return 0;
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}
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static const struct snd_kcontrol_new hdmi_controls[] = {
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{
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.access = SNDRV_CTL_ELEM_ACCESS_READ |
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SNDRV_CTL_ELEM_ACCESS_VOLATILE,
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.iface = SNDRV_CTL_ELEM_IFACE_PCM,
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.name = "ELD",
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.info = hdmi_eld_ctl_info,
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.get = hdmi_eld_ctl_get,
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},
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};
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static int hdmi_codec_new_stream(struct snd_pcm_substream *substream,
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struct snd_soc_dai *dai)
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{
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struct hdmi_codec_priv *hcp = snd_soc_dai_get_drvdata(dai);
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int ret = 0;
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mutex_lock(&hcp->current_stream_lock);
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if (!hcp->current_stream) {
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hcp->current_stream = substream;
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} else if (hcp->current_stream != substream) {
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dev_err(dai->dev, "Only one simultaneous stream supported!\n");
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ret = -EINVAL;
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}
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mutex_unlock(&hcp->current_stream_lock);
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return ret;
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}
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static int hdmi_codec_startup(struct snd_pcm_substream *substream,
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struct snd_soc_dai *dai)
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{
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struct hdmi_codec_priv *hcp = snd_soc_dai_get_drvdata(dai);
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int ret = 0;
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dev_dbg(dai->dev, "%s()\n", __func__);
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ret = hdmi_codec_new_stream(substream, dai);
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if (ret)
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return ret;
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if (hcp->hcd.ops->audio_startup) {
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ret = hcp->hcd.ops->audio_startup(dai->dev->parent, hcp->hcd.data);
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if (ret) {
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mutex_lock(&hcp->current_stream_lock);
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hcp->current_stream = NULL;
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mutex_unlock(&hcp->current_stream_lock);
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return ret;
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}
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}
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if (hcp->hcd.ops->get_eld) {
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ret = hcp->hcd.ops->get_eld(dai->dev->parent, hcp->hcd.data,
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hcp->eld, sizeof(hcp->eld));
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if (!ret) {
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ret = snd_pcm_hw_constraint_eld(substream->runtime,
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hcp->eld);
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if (ret) {
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mutex_lock(&hcp->current_stream_lock);
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hcp->current_stream = NULL;
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mutex_unlock(&hcp->current_stream_lock);
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return ret;
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}
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}
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}
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return 0;
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}
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static void hdmi_codec_shutdown(struct snd_pcm_substream *substream,
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struct snd_soc_dai *dai)
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{
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struct hdmi_codec_priv *hcp = snd_soc_dai_get_drvdata(dai);
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dev_dbg(dai->dev, "%s()\n", __func__);
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WARN_ON(hcp->current_stream != substream);
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hcp->hcd.ops->audio_shutdown(dai->dev->parent, hcp->hcd.data);
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mutex_lock(&hcp->current_stream_lock);
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hcp->current_stream = NULL;
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mutex_unlock(&hcp->current_stream_lock);
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}
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static int hdmi_codec_hw_params(struct snd_pcm_substream *substream,
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struct snd_pcm_hw_params *params,
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struct snd_soc_dai *dai)
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{
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struct hdmi_codec_priv *hcp = snd_soc_dai_get_drvdata(dai);
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struct hdmi_codec_params hp = {
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.iec = {
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.status = { 0 },
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.subcode = { 0 },
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.pad = 0,
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.dig_subframe = { 0 },
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}
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};
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int ret;
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dev_dbg(dai->dev, "%s() width %d rate %d channels %d\n", __func__,
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params_width(params), params_rate(params),
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params_channels(params));
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if (params_width(params) > 24)
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params->msbits = 24;
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ret = snd_pcm_create_iec958_consumer_hw_params(params, hp.iec.status,
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sizeof(hp.iec.status));
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if (ret < 0) {
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dev_err(dai->dev, "Creating IEC958 channel status failed %d\n",
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ret);
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return ret;
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}
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ret = hdmi_codec_new_stream(substream, dai);
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if (ret)
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return ret;
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hdmi_audio_infoframe_init(&hp.cea);
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hp.cea.channels = params_channels(params);
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hp.cea.coding_type = HDMI_AUDIO_CODING_TYPE_STREAM;
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hp.cea.sample_size = HDMI_AUDIO_SAMPLE_SIZE_STREAM;
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hp.cea.sample_frequency = HDMI_AUDIO_SAMPLE_FREQUENCY_STREAM;
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hp.sample_width = params_width(params);
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hp.sample_rate = params_rate(params);
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hp.channels = params_channels(params);
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return hcp->hcd.ops->hw_params(dai->dev->parent, hcp->hcd.data,
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&hcp->daifmt[dai->id], &hp);
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}
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static int hdmi_codec_set_fmt(struct snd_soc_dai *dai,
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unsigned int fmt)
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{
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struct hdmi_codec_priv *hcp = snd_soc_dai_get_drvdata(dai);
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struct hdmi_codec_daifmt cf = { 0 };
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int ret = 0;
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dev_dbg(dai->dev, "%s()\n", __func__);
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if (dai->id == DAI_ID_SPDIF) {
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cf.fmt = HDMI_SPDIF;
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} else {
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switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
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case SND_SOC_DAIFMT_CBM_CFM:
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cf.bit_clk_master = 1;
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cf.frame_clk_master = 1;
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break;
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case SND_SOC_DAIFMT_CBS_CFM:
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cf.frame_clk_master = 1;
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break;
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case SND_SOC_DAIFMT_CBM_CFS:
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cf.bit_clk_master = 1;
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break;
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case SND_SOC_DAIFMT_CBS_CFS:
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break;
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default:
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return -EINVAL;
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}
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switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
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case SND_SOC_DAIFMT_NB_NF:
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break;
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case SND_SOC_DAIFMT_NB_IF:
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cf.frame_clk_inv = 1;
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break;
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case SND_SOC_DAIFMT_IB_NF:
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cf.bit_clk_inv = 1;
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break;
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case SND_SOC_DAIFMT_IB_IF:
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cf.frame_clk_inv = 1;
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cf.bit_clk_inv = 1;
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break;
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}
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switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
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case SND_SOC_DAIFMT_I2S:
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cf.fmt = HDMI_I2S;
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break;
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case SND_SOC_DAIFMT_DSP_A:
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cf.fmt = HDMI_DSP_A;
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break;
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case SND_SOC_DAIFMT_DSP_B:
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cf.fmt = HDMI_DSP_B;
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break;
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case SND_SOC_DAIFMT_RIGHT_J:
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cf.fmt = HDMI_RIGHT_J;
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break;
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case SND_SOC_DAIFMT_LEFT_J:
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cf.fmt = HDMI_LEFT_J;
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break;
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case SND_SOC_DAIFMT_AC97:
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cf.fmt = HDMI_AC97;
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break;
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default:
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dev_err(dai->dev, "Invalid DAI interface format\n");
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return -EINVAL;
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}
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}
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hcp->daifmt[dai->id] = cf;
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return ret;
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}
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static int hdmi_codec_digital_mute(struct snd_soc_dai *dai, int mute)
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{
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struct hdmi_codec_priv *hcp = snd_soc_dai_get_drvdata(dai);
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dev_dbg(dai->dev, "%s()\n", __func__);
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if (hcp->hcd.ops->digital_mute)
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return hcp->hcd.ops->digital_mute(dai->dev->parent,
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hcp->hcd.data, mute);
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return 0;
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}
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static const struct snd_soc_dai_ops hdmi_dai_ops = {
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.startup = hdmi_codec_startup,
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.shutdown = hdmi_codec_shutdown,
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.hw_params = hdmi_codec_hw_params,
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.set_fmt = hdmi_codec_set_fmt,
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.digital_mute = hdmi_codec_digital_mute,
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};
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#define HDMI_RATES (SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_44100 |\
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SNDRV_PCM_RATE_48000 | SNDRV_PCM_RATE_88200 |\
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SNDRV_PCM_RATE_96000 | SNDRV_PCM_RATE_176400 |\
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SNDRV_PCM_RATE_192000)
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#define SPDIF_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S16_BE |\
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SNDRV_PCM_FMTBIT_S20_3LE | SNDRV_PCM_FMTBIT_S20_3BE |\
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SNDRV_PCM_FMTBIT_S24_3LE | SNDRV_PCM_FMTBIT_S24_3BE |\
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SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S24_BE)
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/*
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* This list is only for formats allowed on the I2S bus. So there is
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* some formats listed that are not supported by HDMI interface. For
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* instance allowing the 32-bit formats enables 24-precision with CPU
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* DAIs that do not support 24-bit formats. If the extra formats cause
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* problems, we should add the video side driver an option to disable
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* them.
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*/
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#define I2S_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S16_BE |\
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SNDRV_PCM_FMTBIT_S20_3LE | SNDRV_PCM_FMTBIT_S20_3BE |\
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SNDRV_PCM_FMTBIT_S24_3LE | SNDRV_PCM_FMTBIT_S24_3BE |\
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SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S24_BE |\
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SNDRV_PCM_FMTBIT_S32_LE | SNDRV_PCM_FMTBIT_S32_BE)
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static struct snd_soc_dai_driver hdmi_i2s_dai = {
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.id = DAI_ID_I2S,
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.playback = {
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.stream_name = "Playback",
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.channels_min = 2,
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.channels_max = 8,
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.rates = HDMI_RATES,
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.formats = I2S_FORMATS,
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.sig_bits = 24,
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},
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.ops = &hdmi_dai_ops,
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};
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static const struct snd_soc_dai_driver hdmi_spdif_dai = {
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.id = DAI_ID_SPDIF,
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.playback = {
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.stream_name = "Playback",
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|
.channels_min = 2,
|
||
|
|
.channels_max = 2,
|
||
|
|
.rates = HDMI_RATES,
|
||
|
|
.formats = SPDIF_FORMATS,
|
||
|
|
},
|
||
|
|
.ops = &hdmi_dai_ops,
|
||
|
|
};
|
||
|
|
|
||
|
|
static char hdmi_dai_name[][DAI_NAME_SIZE] = {
|
||
|
|
"hdmi-hifi.0",
|
||
|
|
"hdmi-hifi.1",
|
||
|
|
"hdmi-hifi.2",
|
||
|
|
"hdmi-hifi.3",
|
||
|
|
};
|
||
|
|
|
||
|
|
static int hdmi_of_xlate_dai_name(struct snd_soc_component *component,
|
||
|
|
struct of_phandle_args *args,
|
||
|
|
const char **dai_name)
|
||
|
|
{
|
||
|
|
int id;
|
||
|
|
|
||
|
|
if (args->args_count)
|
||
|
|
id = args->args[0];
|
||
|
|
else
|
||
|
|
id = 0;
|
||
|
|
|
||
|
|
if (id < ARRAY_SIZE(hdmi_dai_name)) {
|
||
|
|
*dai_name = hdmi_dai_name[id];
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
return -EAGAIN;
|
||
|
|
}
|
||
|
|
|
||
|
|
static struct snd_soc_codec_driver hdmi_codec = {
|
||
|
|
.component_driver = {
|
||
|
|
.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),
|
||
|
|
.of_xlate_dai_name = hdmi_of_xlate_dai_name,
|
||
|
|
},
|
||
|
|
};
|
||
|
|
|
||
|
|
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;
|
||
|
|
struct hdmi_device *hd;
|
||
|
|
struct list_head *pos;
|
||
|
|
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;
|
||
|
|
|
||
|
|
hd = NULL;
|
||
|
|
list_for_each(pos, &hdmi_device_list) {
|
||
|
|
struct hdmi_device *tmp = pos_to_hdmi_device(pos);
|
||
|
|
|
||
|
|
if (tmp->dev == dev->parent) {
|
||
|
|
hd = tmp;
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
if (!hd) {
|
||
|
|
hd = devm_kzalloc(dev, sizeof(*hd), GFP_KERNEL);
|
||
|
|
if (!hd)
|
||
|
|
return -ENOMEM;
|
||
|
|
|
||
|
|
hd->dev = dev->parent;
|
||
|
|
|
||
|
|
list_add_tail(&hd->list, &hdmi_device_list);
|
||
|
|
}
|
||
|
|
|
||
|
|
if (hd->cnt >= ARRAY_SIZE(hdmi_dai_name)) {
|
||
|
|
dev_err(dev, "too many hdmi codec are deteced\n");
|
||
|
|
return -EINVAL;
|
||
|
|
}
|
||
|
|
|
||
|
|
hcp->hcd = *hcd;
|
||
|
|
mutex_init(&hcp->current_stream_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;
|
||
|
|
hcp->daidrv[i].name = hdmi_dai_name[hd->cnt++];
|
||
|
|
i++;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (hcd->spdif) {
|
||
|
|
hcp->daidrv[i] = hdmi_spdif_dai;
|
||
|
|
hcp->daidrv[i].name = hdmi_dai_name[hd->cnt++];
|
||
|
|
}
|
||
|
|
|
||
|
|
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;
|
||
|
|
}
|
||
|
|
|
||
|
|
dev_set_drvdata(dev, hcp);
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
static int hdmi_codec_remove(struct platform_device *pdev)
|
||
|
|
{
|
||
|
|
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);
|