115 lines
3.0 KiB
C
115 lines
3.0 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* mt2701-hdmi.c -- MT2701 HDMI ALSA SoC machine driver
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*
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* Copyright (c) 2026 Daniel Golle <daniel@makrotopia.org>
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*
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* Based on mt2701-cs42448.c
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*/
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#include <linux/module.h>
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#include <linux/of.h>
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#include <linux/platform_device.h>
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#include <sound/soc.h>
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enum {
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DAI_LINK_FE_HDMI_OUT,
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DAI_LINK_BE_HDMI_I2S,
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};
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SND_SOC_DAILINK_DEFS(fe_hdmi_out,
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DAILINK_COMP_ARRAY(COMP_CPU("PCM_HDMI")),
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DAILINK_COMP_ARRAY(COMP_DUMMY()),
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DAILINK_COMP_ARRAY(COMP_EMPTY()));
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SND_SOC_DAILINK_DEFS(be_hdmi_i2s,
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DAILINK_COMP_ARRAY(COMP_CPU("HDMI I2S")),
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DAILINK_COMP_ARRAY(COMP_CODEC(NULL, "i2s-hifi")),
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DAILINK_COMP_ARRAY(COMP_EMPTY()));
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static struct snd_soc_dai_link mt2701_hdmi_dai_links[] = {
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[DAI_LINK_FE_HDMI_OUT] = {
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.name = "HDMI Playback",
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.stream_name = "HDMI Playback",
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.trigger = { SND_SOC_DPCM_TRIGGER_POST,
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SND_SOC_DPCM_TRIGGER_POST },
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.dynamic = 1,
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.playback_only = 1,
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SND_SOC_DAILINK_REG(fe_hdmi_out),
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},
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[DAI_LINK_BE_HDMI_I2S] = {
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.name = "HDMI BE",
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.no_pcm = 1,
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.playback_only = 1,
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.dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
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SND_SOC_DAIFMT_CBC_CFC,
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SND_SOC_DAILINK_REG(be_hdmi_i2s),
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},
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};
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static struct snd_soc_card mt2701_hdmi_soc_card = {
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.name = "mt2701-hdmi",
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.owner = THIS_MODULE,
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.dai_link = mt2701_hdmi_dai_links,
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.num_links = ARRAY_SIZE(mt2701_hdmi_dai_links),
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};
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static int mt2701_hdmi_machine_probe(struct platform_device *pdev)
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{
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struct snd_soc_card *card = &mt2701_hdmi_soc_card;
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struct device *dev = &pdev->dev;
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struct device_node *platform_node;
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struct device_node *codec_node;
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struct snd_soc_dai_link *dai_link;
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int ret;
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int i;
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platform_node = of_parse_phandle(dev->of_node, "mediatek,platform", 0);
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if (!platform_node)
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return dev_err_probe(dev, -EINVAL,
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"Property 'mediatek,platform' missing\n");
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for_each_card_prelinks(card, i, dai_link) {
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if (dai_link->platforms->name)
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continue;
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dai_link->platforms->of_node = platform_node;
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}
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codec_node = of_parse_phandle(dev->of_node, "mediatek,audio-codec", 0);
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if (!codec_node) {
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of_node_put(platform_node);
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return dev_err_probe(dev, -EINVAL,
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"Property 'mediatek,audio-codec' missing\n");
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}
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mt2701_hdmi_dai_links[DAI_LINK_BE_HDMI_I2S].codecs->of_node = codec_node;
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card->dev = dev;
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ret = devm_snd_soc_register_card(dev, card);
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of_node_put(platform_node);
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of_node_put(codec_node);
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return ret;
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}
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static const struct of_device_id mt2701_hdmi_machine_dt_match[] = {
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{ .compatible = "mediatek,mt2701-hdmi-audio" },
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{ .compatible = "mediatek,mt7623n-hdmi-audio" },
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{}
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};
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MODULE_DEVICE_TABLE(of, mt2701_hdmi_machine_dt_match);
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static struct platform_driver mt2701_hdmi_machine = {
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.driver = {
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.name = "mt2701-hdmi",
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.of_match_table = mt2701_hdmi_machine_dt_match,
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},
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.probe = mt2701_hdmi_machine_probe,
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};
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module_platform_driver(mt2701_hdmi_machine);
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MODULE_DESCRIPTION("MT2701 HDMI ALSA SoC machine driver");
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MODULE_AUTHOR("Daniel Golle <daniel@makrotopia.org>");
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MODULE_LICENSE("GPL");
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MODULE_ALIAS("platform:mt2701-hdmi");
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