From: Liam Girdwood liam.r.girdwood@linux.intel.com
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 --- include/sound/sof.h | 6 +++ sound/soc/sof/nocodec.c | 109 ++++++++++++++++++++++++++++++++++++++++ 2 files changed, 115 insertions(+) create mode 100644 sound/soc/sof/nocodec.c
diff --git a/include/sound/sof.h b/include/sound/sof.h index 54f65ec33a6c..4640566b54fe 100644 --- a/include/sound/sof.h +++ b/include/sound/sof.h @@ -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 diff --git a/sound/soc/sof/nocodec.c b/sound/soc/sof/nocodec.c new file mode 100644 index 000000000000..4a66abe065c9 --- /dev/null +++ b/sound/soc/sof/nocodec.c @@ -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 = 0; + + 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");