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ASoC: SOF: Add Nocodec machine driver support

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Add a simple "fallback" machine driver that can be used to enable SOF
on boards with no codec device. This machine driver can also be forced
for debug/development.

Signed-off-by: Keyon Jie <yang.jie@linux.intel.com>
Signed-off-by: Liam Girdwood <liam.r.girdwood@linux.intel.com>
Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Reviewed-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Liam Girdwood 2019-04-12 11:05:17 -05:00 • committed by Mark Brown
parent 8920153c64
commit 8017b8fd37
No known key found for this signature in database
GPG key ID: 24D68B725D5487D0
2 changed files with 115 additions and 0 deletions
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6
include/sound/sof.h
View file

@ -12,6 +12,7 @@
#define __INCLUDE_SOUND_SOF_H
#include <linux/pci.h>
#include <sound/soc.h>
#include <sound/soc-acpi.h>
struct snd_sof_dsp_ops;
@ -91,4 +92,9 @@ struct sof_dev_desc {
const struct sof_arch_ops *arch_ops;
};
int sof_nocodec_setup(struct device *dev,
struct snd_sof_pdata *sof_pdata,
struct snd_soc_acpi_mach *mach,
const struct sof_dev_desc *desc,
const struct snd_sof_dsp_ops *ops);
#endif

109
sound/soc/sof/nocodec.c Normal file
View file

@ -0,0 +1,109 @@
// SPDX-License-Identifier: (GPL-2.0 OR BSD-3-Clause)
//
// This file is provided under a dual BSD/GPLv2 license. When using or
// redistributing this file, you may do so under either license.
//
// Copyright(c) 2018 Intel Corporation. All rights reserved.
//
// Author: Liam Girdwood <liam.r.girdwood@linux.intel.com>
//
#include <linux/module.h>
#include <sound/sof.h>
#include "sof-priv.h"
static struct snd_soc_card sof_nocodec_card = {
.name = "nocodec", /* the sof- prefix is added by the core */
};
static int sof_nocodec_bes_setup(struct device *dev,
const struct snd_sof_dsp_ops *ops,
struct snd_soc_dai_link *links,
int link_num, struct snd_soc_card *card)
{
int i;
if (!ops || !links || !card)
return -EINVAL;
/* set up BE dai_links */
for (i = 0; i < link_num; i++) {
links[i].name = devm_kasprintf(dev, GFP_KERNEL,
"NoCodec-%d", i);
if (!links[i].name)
return -ENOMEM;
links[i].id = i;
links[i].no_pcm = 1;
links[i].cpu_dai_name = ops->drv[i].name;
links[i].platform_name = dev_name(dev);
links[i].codec_dai_name = "snd-soc-dummy-dai";
links[i].codec_name = "snd-soc-dummy";
links[i].dpcm_playback = 1;
links[i].dpcm_capture = 1;
}
card->dai_link = links;
card->num_links = link_num;
return 0;
}
int sof_nocodec_setup(struct device *dev,
struct snd_sof_pdata *sof_pdata,
struct snd_soc_acpi_mach *mach,
const struct sof_dev_desc *desc,
const struct snd_sof_dsp_ops *ops)
{
struct snd_soc_dai_link *links;
int ret;
if (!mach)
return -EINVAL;
sof_pdata->drv_name = "sof-nocodec";
mach->drv_name = "sof-nocodec";
sof_pdata->fw_filename = desc->nocodec_fw_filename;
sof_pdata->tplg_filename = desc->nocodec_tplg_filename;
/* create dummy BE dai_links */
links = devm_kzalloc(dev, sizeof(struct snd_soc_dai_link) *
ops->num_drv, GFP_KERNEL);
if (!links)
return -ENOMEM;
ret = sof_nocodec_bes_setup(dev, ops, links, ops->num_drv,
&sof_nocodec_card);
return ret;
}
EXPORT_SYMBOL(sof_nocodec_setup);
static int sof_nocodec_probe(struct platform_device *pdev)
{
struct snd_soc_card *card = &sof_nocodec_card;
card->dev = &pdev->dev;
return devm_snd_soc_register_card(&pdev->dev, card);
}
static int sof_nocodec_remove(struct platform_device *pdev)
{
return 0;
}
static struct platform_driver sof_nocodec_audio = {
.probe = sof_nocodec_probe,
.remove = sof_nocodec_remove,
.driver = {
.name = "sof-nocodec",
.pm = &snd_soc_pm_ops,
},
};
module_platform_driver(sof_nocodec_audio)
MODULE_DESCRIPTION("ASoC sof nocodec");
MODULE_AUTHOR("Liam Girdwood");
MODULE_LICENSE("Dual BSD/GPL");
MODULE_ALIAS("platform:sof-nocodec");