// SPDX-License-Identifier: GPL-2.0-only
//
// Copyright(c) 2021-2022 Intel Corporation
//
// Authors: Cezary Rojewski <[email protected]>
// Amadeusz Slawinski <[email protected]>
//
#include <linux/module.h>
#include <linux/platform_device.h>
#include <sound/hda_codec.h>
#include <sound/hda_i915.h>
#include <sound/soc.h>
#include <sound/soc-acpi.h>
#include "../../../codecs/hda.h"
static int avs_create_dai_links(struct device *dev, struct hda_codec *codec, int pcm_count,
const char *platform_name, struct snd_soc_dai_link **links)
{
struct snd_soc_dai_link_component *platform;
struct snd_soc_dai_link *dl;
struct hda_pcm *pcm;
const char *cname = dev_name(&codec->core.dev);
int i;
dl = devm_kcalloc(dev, pcm_count, sizeof(*dl), GFP_KERNEL);
platform = devm_kzalloc(dev, sizeof(*platform), GFP_KERNEL);
if (!dl || !platform)
return -ENOMEM;
platform->name = platform_name;
pcm = list_first_entry(&codec->pcm_list_head, struct hda_pcm, list);
for (i = 0; i < pcm_count; i++, pcm = list_next_entry(pcm, list)) {
dl[i].name = devm_kasprintf(dev, GFP_KERNEL, "%s link%d", cname, i);
if (!dl[i].name)
return -ENOMEM;
dl[i].id = i;
dl[i].nonatomic = 1;
dl[i].no_pcm = 1;
dl[i].dpcm_playback = 1;
dl[i].dpcm_capture = 1;
dl[i].platforms = platform;
dl[i].num_platforms = 1;
dl[i].ignore_pmdown_time = 1;
dl[i].codecs = devm_kzalloc(dev, sizeof(*dl->codecs), GFP_KERNEL);
dl[i].cpus = devm_kzalloc(dev, sizeof(*dl->cpus), GFP_KERNEL);
if (!dl[i].codecs || !dl[i].cpus)
return -ENOMEM;
dl[i].cpus->dai_name = devm_kasprintf(dev, GFP_KERNEL, "%s-cpu%d", cname, i);
if (!dl[i].cpus->dai_name)
return -ENOMEM;
dl[i].codecs->name = devm_kstrdup_const(dev, cname, GFP_KERNEL);
if (!dl[i].codecs->name)
return -ENOMEM;
dl[i].codecs->dai_name = pcm->name;
dl[i].num_codecs = 1;
dl[i].num_cpus = 1;
}
*links = dl;
return 0;
}
/* Should be aligned with SectionPCM's name from topology */
#define FEDAI_NAME_PREFIX "HDMI"
static struct snd_pcm *
avs_card_hdmi_pcm_at(struct snd_soc_card *card, int hdmi_idx)
{
struct snd_soc_pcm_runtime *rtd;
int dir = SNDRV_PCM_STREAM_PLAYBACK;
for_each_card_rtds(card, rtd) {
struct snd_pcm *spcm;
int ret, n;
spcm = rtd->pcm ? rtd->pcm->streams[dir].pcm : NULL;
if (!spcm || !strstr(spcm->id, FEDAI_NAME_PREFIX))
continue;
ret = sscanf(spcm->id, FEDAI_NAME_PREFIX "%d", &n);
if (ret != 1)
continue;
if (n == hdmi_idx)
return rtd->pcm;
}
return NULL;
}
static int avs_card_late_probe(struct snd_soc_card *card)
{
struct snd_soc_acpi_mach *mach = dev_get_platdata(card->dev);
struct hda_codec *codec = mach->pdata;
struct hda_pcm *hpcm;
/* Topology pcm indexing is 1-based */
int i = 1;
list_for_each_entry(hpcm, &codec->pcm_list_head, list) {
struct snd_pcm *spcm;
spcm = avs_card_hdmi_pcm_at(card, i);
if (spcm) {
hpcm->pcm = spcm;
hpcm->device = spcm->device;
dev_info(card->dev, "%s: mapping HDMI converter %d to PCM %d (%p)\n",
__func__, i, hpcm->device, spcm);
} else {
hpcm->pcm = NULL;
hpcm->device = SNDRV_PCM_INVALID_DEVICE;
dev_warn(card->dev, "%s: no PCM in topology for HDMI converter %d\n",
__func__, i);
}
i++;
}
return hda_codec_probe_complete(codec);
}
static int avs_probing_link_init(struct snd_soc_pcm_runtime *rtm)
{
struct snd_soc_acpi_mach *mach;
struct snd_soc_dai_link *links = NULL;
struct snd_soc_card *card = rtm->card;
struct hda_codec *codec;
struct hda_pcm *pcm;
int ret, pcm_count = 0;
mach = dev_get_platdata(card->dev);
codec = mach->pdata;
if (list_empty(&codec->pcm_list_head))
return -EINVAL;
list_for_each_entry(pcm, &codec->pcm_list_head, list)
pcm_count++;
ret = avs_create_dai_links(card->dev, codec, pcm_count, mach->mach_params.platform, &links);
if (ret < 0) {
dev_err(card->dev, "create links failed: %d\n", ret);
return ret;
}
ret = snd_soc_add_pcm_runtimes(card, links, pcm_count);
if (ret < 0) {
dev_err(card->dev, "add links failed: %d\n", ret);
return ret;
}
return 0;
}
static const struct snd_soc_dai_link probing_link = {
.name = "probing-LINK",
.id = -1,
.nonatomic = 1,
.no_pcm = 1,
.dpcm_playback = 1,
.dpcm_capture = 1,
.cpus = &snd_soc_dummy_dlc,
.num_cpus = 1,
.init = avs_probing_link_init,
};
static int avs_hdaudio_probe(struct platform_device *pdev)
{
struct snd_soc_dai_link *binder;
struct snd_soc_acpi_mach *mach;
struct snd_soc_card *card;
struct device *dev = &pdev->dev;
struct hda_codec *codec;
mach = dev_get_platdata(dev);
codec = mach->pdata;
/* codec may be unloaded before card's probe() fires */
if (!device_is_registered(&codec->core.dev))
return -ENODEV;
binder = devm_kmemdup(dev, &probing_link, sizeof(probing_link), GFP_KERNEL);
if (!binder)
return -ENOMEM;
binder->platforms = devm_kzalloc(dev, sizeof(*binder->platforms), GFP_KERNEL);
binder->codecs = devm_kzalloc(dev, sizeof(*binder->codecs), GFP_KERNEL);
if (!binder->platforms || !binder->codecs)
return -ENOMEM;
binder->codecs->name = devm_kstrdup_const(dev, dev_name(&codec->core.dev), GFP_KERNEL);
if (!binder->codecs->name)
return -ENOMEM;
binder->platforms->name = mach->mach_params.platform;
binder->num_platforms = 1;
binder->codecs->dai_name = "codec-probing-DAI";
binder->num_codecs = 1;
card = devm_kzalloc(dev, sizeof(*card), GFP_KERNEL);
if (!card)
return -ENOMEM;
card->name = binder->codecs->name;
card->dev = dev;
card->owner = THIS_MODULE;
card->dai_link = binder;
card->num_links = 1;
card->fully_routed = true;
if (hda_codec_is_display(codec))
card->late_probe = avs_card_late_probe;
return devm_snd_soc_register_card(dev, card);
}
static const struct platform_device_id avs_hdaudio_driver_ids[] = {
{
.name = "avs_hdaudio",
},
{},
};
MODULE_DEVICE_TABLE(platform, avs_hdaudio_driver_ids);
static struct platform_driver avs_hdaudio_driver = {
.probe = avs_hdaudio_probe,
.driver = {
.name = "avs_hdaudio",
.pm = &snd_soc_pm_ops,
},
.id_table = avs_hdaudio_driver_ids,
};
module_platform_driver(avs_hdaudio_driver)
MODULE_DESCRIPTION("Intel HD-Audio machine driver");
MODULE_AUTHOR("Cezary Rojewski <[email protected]>");
MODULE_LICENSE("GPL");
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