// SPDX-License-Identifier: GPL-2.0
/*
 * mt2701-hdmi.c -- MT2701 HDMI ALSA SoC machine driver
 *
 * Copyright (c) 2026 Daniel Golle <daniel@makrotopia.org>
 *
 * Based on mt2701-cs42448.c
 */

#include <linux/module.h>
#include <linux/of.h>
#include <linux/platform_device.h>
#include <sound/soc.h>

enum {
        DAI_LINK_FE_HDMI_OUT,
        DAI_LINK_BE_HDMI_I2S,
};

SND_SOC_DAILINK_DEFS(fe_hdmi_out,
        DAILINK_COMP_ARRAY(COMP_CPU("PCM_HDMI")),
        DAILINK_COMP_ARRAY(COMP_DUMMY()),
        DAILINK_COMP_ARRAY(COMP_EMPTY()));

SND_SOC_DAILINK_DEFS(be_hdmi_i2s,
        DAILINK_COMP_ARRAY(COMP_CPU("HDMI I2S")),
        DAILINK_COMP_ARRAY(COMP_CODEC(NULL, "i2s-hifi")),
        DAILINK_COMP_ARRAY(COMP_EMPTY()));

static struct snd_soc_dai_link mt2701_hdmi_dai_links[] = {
        [DAI_LINK_FE_HDMI_OUT] = {
                .name = "HDMI Playback",
                .stream_name = "HDMI Playback",
                .trigger = { SND_SOC_DPCM_TRIGGER_POST,
                             SND_SOC_DPCM_TRIGGER_POST },
                .dynamic = 1,
                .playback_only = 1,
                SND_SOC_DAILINK_REG(fe_hdmi_out),
        },
        [DAI_LINK_BE_HDMI_I2S] = {
                .name = "HDMI BE",
                .no_pcm = 1,
                .playback_only = 1,
                .dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
                           SND_SOC_DAIFMT_CBC_CFC,
                SND_SOC_DAILINK_REG(be_hdmi_i2s),
        },
};

static struct snd_soc_card mt2701_hdmi_soc_card = {
        .name = "mt2701-hdmi",
        .owner = THIS_MODULE,
        .dai_link = mt2701_hdmi_dai_links,
        .num_links = ARRAY_SIZE(mt2701_hdmi_dai_links),
};

static int mt2701_hdmi_machine_probe(struct platform_device *pdev)
{
        struct snd_soc_card *card = &mt2701_hdmi_soc_card;
        struct device *dev = &pdev->dev;
        struct device_node *platform_node;
        struct device_node *codec_node;
        struct snd_soc_dai_link *dai_link;
        int ret;
        int i;

        platform_node = of_parse_phandle(dev->of_node, "mediatek,platform", 0);
        if (!platform_node)
                return dev_err_probe(dev, -EINVAL,
                                     "Property 'mediatek,platform' missing\n");

        for_each_card_prelinks(card, i, dai_link) {
                if (dai_link->platforms->name)
                        continue;
                dai_link->platforms->of_node = platform_node;
        }

        codec_node = of_parse_phandle(dev->of_node, "mediatek,audio-codec", 0);
        if (!codec_node) {
                of_node_put(platform_node);
                return dev_err_probe(dev, -EINVAL,
                                     "Property 'mediatek,audio-codec' missing\n");
        }
        mt2701_hdmi_dai_links[DAI_LINK_BE_HDMI_I2S].codecs->of_node = codec_node;

        card->dev = dev;

        ret = devm_snd_soc_register_card(dev, card);

        of_node_put(platform_node);
        of_node_put(codec_node);
        return ret;
}

static const struct of_device_id mt2701_hdmi_machine_dt_match[] = {
        { .compatible = "mediatek,mt2701-hdmi-audio" },
        { .compatible = "mediatek,mt7623n-hdmi-audio" },
        {}
};
MODULE_DEVICE_TABLE(of, mt2701_hdmi_machine_dt_match);

static struct platform_driver mt2701_hdmi_machine = {
        .driver = {
                .name = "mt2701-hdmi",
                .of_match_table = mt2701_hdmi_machine_dt_match,
        },
        .probe = mt2701_hdmi_machine_probe,
};
module_platform_driver(mt2701_hdmi_machine);

MODULE_DESCRIPTION("MT2701 HDMI ALSA SoC machine driver");
MODULE_AUTHOR("Daniel Golle <daniel@makrotopia.org>");
MODULE_LICENSE("GPL");
MODULE_ALIAS("platform:mt2701-hdmi");