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linux_dsm_epyc7002/sound/soc/ti/omap-hdmi.c
Thomas Gleixner 1802d0beec treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 174 
Based on 1 normalized pattern(s):

  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

extracted by the scancode license scanner the SPDX license identifier

  GPL-2.0-only

has been chosen to replace the boilerplate/reference in 655 file(s).

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Allison Randal <allison@lohutok.net>
Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org>
Reviewed-by: Richard Fontana <rfontana@redhat.com>
Cc: linux-spdx@vger.kernel.org
Link: https://lkml.kernel.org/r/20190527070034.575739538@linutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-05-30 11:26:41 -07:00

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// SPDX-License-Identifier: GPL-2.0-only
/*
* omap-hdmi-audio.c -- OMAP4+ DSS HDMI audio support library
*
* Copyright (C) 2014 Texas Instruments Incorporated - http://www.ti.com
*
* Author: Jyri Sarha <jsarha@ti.com>
*/
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/err.h>
#include <linux/string.h>
#include <linux/platform_device.h>
#include <sound/soc.h>
#include <sound/pcm_params.h>
#include <sound/dmaengine_pcm.h>
#include <uapi/sound/asound.h>
#include <sound/asoundef.h>
#include <sound/omap-hdmi-audio.h>
#include "sdma-pcm.h"
#define DRV_NAME "omap-hdmi-audio"
struct hdmi_audio_data {
struct snd_soc_card *card;
const struct omap_hdmi_audio_ops *ops;
struct device *dssdev;
struct snd_dmaengine_dai_dma_data dma_data;
struct omap_dss_audio dss_audio;
struct snd_aes_iec958 iec;
struct snd_cea_861_aud_if cea;
struct mutex current_stream_lock;
struct snd_pcm_substream *current_stream;
};
static
struct hdmi_audio_data *card_drvdata_substream(struct snd_pcm_substream *ss)
{
struct snd_soc_pcm_runtime *rtd = ss->private_data;
return snd_soc_card_get_drvdata(rtd->card);
}
static void hdmi_dai_abort(struct device *dev)
{
struct hdmi_audio_data *ad = dev_get_drvdata(dev);
mutex_lock(&ad->current_stream_lock);
if (ad->current_stream && ad->current_stream->runtime &&
snd_pcm_running(ad->current_stream)) {
dev_err(dev, "HDMI display disabled, aborting playback\n");
snd_pcm_stream_lock_irq(ad->current_stream);
snd_pcm_stop(ad->current_stream, SNDRV_PCM_STATE_DISCONNECTED);
snd_pcm_stream_unlock_irq(ad->current_stream);
}
mutex_unlock(&ad->current_stream_lock);
}
static int hdmi_dai_startup(struct snd_pcm_substream *substream,
struct snd_soc_dai *dai)
{
struct hdmi_audio_data *ad = card_drvdata_substream(substream);
int ret;
/*
* Make sure that the period bytes are multiple of the DMA packet size.
* Largest packet size we use is 32 32-bit words = 128 bytes
*/
ret = snd_pcm_hw_constraint_step(substream->runtime, 0,
SNDRV_PCM_HW_PARAM_PERIOD_BYTES, 128);
if (ret < 0) {
dev_err(dai->dev, "Could not apply period constraint: %d\n",
ret);
return ret;
}
ret = snd_pcm_hw_constraint_step(substream->runtime, 0,
SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 128);
if (ret < 0) {
dev_err(dai->dev, "Could not apply buffer constraint: %d\n",
ret);
return ret;
}
snd_soc_dai_set_dma_data(dai, substream, &ad->dma_data);
mutex_lock(&ad->current_stream_lock);
ad->current_stream = substream;
mutex_unlock(&ad->current_stream_lock);
ret = ad->ops->audio_startup(ad->dssdev, hdmi_dai_abort);
if (ret) {
mutex_lock(&ad->current_stream_lock);
ad->current_stream = NULL;
mutex_unlock(&ad->current_stream_lock);
}
return ret;
}
static int hdmi_dai_hw_params(struct snd_pcm_substream *substream,
struct snd_pcm_hw_params *params,
struct snd_soc_dai *dai)
{
struct hdmi_audio_data *ad = card_drvdata_substream(substream);
struct snd_aes_iec958 *iec = &ad->iec;
struct snd_cea_861_aud_if *cea = &ad->cea;
WARN_ON(ad->current_stream != substream);
switch (params_format(params)) {
case SNDRV_PCM_FORMAT_S16_LE:
ad->dma_data.maxburst = 16;
break;
case SNDRV_PCM_FORMAT_S24_LE:
ad->dma_data.maxburst = 32;
break;
default:
dev_err(dai->dev, "format not supported!\n");
return -EINVAL;
}
ad->dss_audio.iec = iec;
ad->dss_audio.cea = cea;
/*
* fill the IEC-60958 channel status word
*/
/* initialize the word bytes */
memset(iec->status, 0, sizeof(iec->status));
/* specify IEC-60958-3 (commercial use) */
iec->status[0] &= ~IEC958_AES0_PROFESSIONAL;
/* specify that the audio is LPCM*/
iec->status[0] &= ~IEC958_AES0_NONAUDIO;
iec->status[0] |= IEC958_AES0_CON_NOT_COPYRIGHT;
iec->status[0] |= IEC958_AES0_CON_EMPHASIS_NONE;
iec->status[1] = IEC958_AES1_CON_GENERAL;
iec->status[2] |= IEC958_AES2_CON_SOURCE_UNSPEC;
iec->status[2] |= IEC958_AES2_CON_CHANNEL_UNSPEC;
switch (params_rate(params)) {
case 32000:
iec->status[3] |= IEC958_AES3_CON_FS_32000;
break;
case 44100:
iec->status[3] |= IEC958_AES3_CON_FS_44100;
break;
case 48000:
iec->status[3] |= IEC958_AES3_CON_FS_48000;
break;
case 88200:
iec->status[3] |= IEC958_AES3_CON_FS_88200;
break;
case 96000:
iec->status[3] |= IEC958_AES3_CON_FS_96000;
break;
case 176400:
iec->status[3] |= IEC958_AES3_CON_FS_176400;
break;
case 192000:
iec->status[3] |= IEC958_AES3_CON_FS_192000;
break;
default:
dev_err(dai->dev, "rate not supported!\n");
return -EINVAL;
}
/* specify the clock accuracy */
iec->status[3] |= IEC958_AES3_CON_CLOCK_1000PPM;
/*
* specify the word length. The same word length value can mean
* two different lengths. Hence, we need to specify the maximum
* word length as well.
*/
switch (params_format(params)) {
case SNDRV_PCM_FORMAT_S16_LE:
iec->status[4] |= IEC958_AES4_CON_WORDLEN_20_16;
iec->status[4] &= ~IEC958_AES4_CON_MAX_WORDLEN_24;
break;
case SNDRV_PCM_FORMAT_S24_LE:
iec->status[4] |= IEC958_AES4_CON_WORDLEN_24_20;
iec->status[4] |= IEC958_AES4_CON_MAX_WORDLEN_24;
break;
default:
dev_err(dai->dev, "format not supported!\n");
return -EINVAL;
}
/*
* Fill the CEA-861 audio infoframe (see spec for details)
*/
cea->db1_ct_cc = (params_channels(params) - 1)
& CEA861_AUDIO_INFOFRAME_DB1CC;
cea->db1_ct_cc |= CEA861_AUDIO_INFOFRAME_DB1CT_FROM_STREAM;
cea->db2_sf_ss = CEA861_AUDIO_INFOFRAME_DB2SF_FROM_STREAM;
cea->db2_sf_ss |= CEA861_AUDIO_INFOFRAME_DB2SS_FROM_STREAM;
cea->db3 = 0; /* not used, all zeros */
if (params_channels(params) == 2)
cea->db4_ca = 0x0;
else if (params_channels(params) == 6)
cea->db4_ca = 0xb;
else
cea->db4_ca = 0x13;
if (cea->db4_ca == 0x00)
cea->db5_dminh_lsv = CEA861_AUDIO_INFOFRAME_DB5_DM_INH_PERMITTED;
else
cea->db5_dminh_lsv = CEA861_AUDIO_INFOFRAME_DB5_DM_INH_PROHIBITED;
/* the expression is trivial but makes clear what we are doing */
cea->db5_dminh_lsv |= (0 & CEA861_AUDIO_INFOFRAME_DB5_LSV);
return ad->ops->audio_config(ad->dssdev, &ad->dss_audio);
}
static int hdmi_dai_trigger(struct snd_pcm_substream *substream, int cmd,
struct snd_soc_dai *dai)
{
struct hdmi_audio_data *ad = card_drvdata_substream(substream);
int err = 0;
WARN_ON(ad->current_stream != substream);
switch (cmd) {
case SNDRV_PCM_TRIGGER_START:
case SNDRV_PCM_TRIGGER_RESUME:
case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
err = ad->ops->audio_start(ad->dssdev);
break;
case SNDRV_PCM_TRIGGER_STOP:
case SNDRV_PCM_TRIGGER_SUSPEND:
case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
ad->ops->audio_stop(ad->dssdev);
break;
default:
err = -EINVAL;
}
return err;
}
static void hdmi_dai_shutdown(struct snd_pcm_substream *substream,
struct snd_soc_dai *dai)
{
struct hdmi_audio_data *ad = card_drvdata_substream(substream);
WARN_ON(ad->current_stream != substream);
ad->ops->audio_shutdown(ad->dssdev);
mutex_lock(&ad->current_stream_lock);
ad->current_stream = NULL;
mutex_unlock(&ad->current_stream_lock);
}
static const struct snd_soc_dai_ops hdmi_dai_ops = {
.startup = hdmi_dai_startup,
.hw_params = hdmi_dai_hw_params,
.trigger = hdmi_dai_trigger,
.shutdown = hdmi_dai_shutdown,
};
static const struct snd_soc_component_driver omap_hdmi_component = {
.name = "omapdss_hdmi",
};
static struct snd_soc_dai_driver omap5_hdmi_dai = {
.name = "omap5-hdmi-dai",
.playback = {
.channels_min = 2,
.channels_max = 8,
.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),
.formats = SNDRV_PCM_FMTBIT_S16_LE,
},
.ops = &hdmi_dai_ops,
};
static struct snd_soc_dai_driver omap4_hdmi_dai = {
.name = "omap4-hdmi-dai",
.playback = {
.channels_min = 2,
.channels_max = 8,
.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),
.formats = SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S24_LE,
},
.ops = &hdmi_dai_ops,
};
static int omap_hdmi_audio_probe(struct platform_device *pdev)
{
struct omap_hdmi_audio_pdata *ha = pdev->dev.platform_data;
struct device *dev = &pdev->dev;
struct hdmi_audio_data *ad;
struct snd_soc_dai_driver *dai_drv;
struct snd_soc_card *card;
int ret;
if (!ha) {
dev_err(dev, "No platform data\n");
return -EINVAL;
}
ad = devm_kzalloc(dev, sizeof(*ad), GFP_KERNEL);
if (!ad)
return -ENOMEM;
ad->dssdev = ha->dev;
ad->ops = ha->ops;
ad->dma_data.addr = ha->audio_dma_addr;
ad->dma_data.filter_data = "audio_tx";
ad->dma_data.addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES;
mutex_init(&ad->current_stream_lock);
switch (ha->version) {
case 4:
dai_drv = &omap4_hdmi_dai;
break;
case 5:
dai_drv = &omap5_hdmi_dai;
break;
default:
return -EINVAL;
}
ret = devm_snd_soc_register_component(ad->dssdev, &omap_hdmi_component,
dai_drv, 1);
if (ret)
return ret;
ret = sdma_pcm_platform_register(ad->dssdev, "audio_tx", NULL);
if (ret)
return ret;
card = devm_kzalloc(dev, sizeof(*card), GFP_KERNEL);
if (!card)
return -ENOMEM;
card->name = devm_kasprintf(dev, GFP_KERNEL,
"HDMI %s", dev_name(ad->dssdev));
if (!card->name)
return -ENOMEM;
card->owner = THIS_MODULE;
card->dai_link =
devm_kzalloc(dev, sizeof(*(card->dai_link)), GFP_KERNEL);
if (!card->dai_link)
return -ENOMEM;
card->dai_link->name = card->name;
card->dai_link->stream_name = card->name;
card->dai_link->cpu_dai_name = dev_name(ad->dssdev);
card->dai_link->platform_name = dev_name(ad->dssdev);
card->dai_link->codec_name = "snd-soc-dummy";
card->dai_link->codec_dai_name = "snd-soc-dummy-dai";
card->num_links = 1;
card->dev = dev;
ret = snd_soc_register_card(card);
if (ret) {
dev_err(dev, "snd_soc_register_card failed (%d)\n", ret);
return ret;
}
ad->card = card;
snd_soc_card_set_drvdata(card, ad);
dev_set_drvdata(dev, ad);
return 0;
}
static int omap_hdmi_audio_remove(struct platform_device *pdev)
{
struct hdmi_audio_data *ad = platform_get_drvdata(pdev);
snd_soc_unregister_card(ad->card);
return 0;
}
static struct platform_driver hdmi_audio_driver = {
.driver = {
.name = DRV_NAME,
},
.probe = omap_hdmi_audio_probe,
.remove = omap_hdmi_audio_remove,
};
module_platform_driver(hdmi_audio_driver);
MODULE_AUTHOR("Jyri Sarha <jsarha@ti.com>");
MODULE_DESCRIPTION("OMAP HDMI Audio Driver");
MODULE_LICENSE("GPL");
MODULE_ALIAS("platform:" DRV_NAME);
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