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- // SPDX-License-Identifier: GPL-2.0
- // Copyright 2017-2020 NXP
- #include <linux/module.h>
- #include <linux/of_platform.h>
- #include <sound/jack.h>
- #include <sound/pcm_params.h>
- #include <sound/hdmi-codec.h>
- #include "fsl_sai.h"
- /**
- * struct cpu_priv - CPU private data
- * @sysclk_id: SYSCLK ids for set_sysclk()
- * @slot_width: Slot width of each frame
- *
- * Note: [1] for tx and [0] for rx
- */
- struct cpu_priv {
- u32 sysclk_id[2];
- u32 slot_width;
- };
- struct imx_hdmi_data {
- struct snd_soc_dai_link dai;
- struct snd_soc_card card;
- struct snd_soc_jack hdmi_jack;
- struct snd_soc_jack_pin hdmi_jack_pin;
- struct cpu_priv cpu_priv;
- u32 dai_fmt;
- };
- static int imx_hdmi_hw_params(struct snd_pcm_substream *substream,
- struct snd_pcm_hw_params *params)
- {
- struct snd_soc_pcm_runtime *rtd = substream->private_data;
- struct imx_hdmi_data *data = snd_soc_card_get_drvdata(rtd->card);
- bool tx = substream->stream == SNDRV_PCM_STREAM_PLAYBACK;
- struct snd_soc_dai *cpu_dai = asoc_rtd_to_cpu(rtd, 0);
- struct snd_soc_card *card = rtd->card;
- struct device *dev = card->dev;
- u32 slot_width = data->cpu_priv.slot_width;
- int ret;
- /* MCLK always is (256 or 192) * rate. */
- ret = snd_soc_dai_set_sysclk(cpu_dai, data->cpu_priv.sysclk_id[tx],
- 8 * slot_width * params_rate(params),
- tx ? SND_SOC_CLOCK_OUT : SND_SOC_CLOCK_IN);
- if (ret && ret != -ENOTSUPP) {
- dev_err(dev, "failed to set cpu sysclk: %d\n", ret);
- return ret;
- }
- ret = snd_soc_dai_set_tdm_slot(cpu_dai, 0, 0, 2, slot_width);
- if (ret && ret != -ENOTSUPP) {
- dev_err(dev, "failed to set cpu dai tdm slot: %d\n", ret);
- return ret;
- }
- return 0;
- }
- static const struct snd_soc_ops imx_hdmi_ops = {
- .hw_params = imx_hdmi_hw_params,
- };
- static const struct snd_soc_dapm_widget imx_hdmi_widgets[] = {
- SND_SOC_DAPM_LINE("HDMI Jack", NULL),
- };
- static int imx_hdmi_init(struct snd_soc_pcm_runtime *rtd)
- {
- struct snd_soc_card *card = rtd->card;
- struct snd_soc_dai *codec_dai = asoc_rtd_to_codec(rtd, 0);
- struct snd_soc_component *component = codec_dai->component;
- struct imx_hdmi_data *data = snd_soc_card_get_drvdata(card);
- int ret;
- data->hdmi_jack_pin.pin = "HDMI Jack";
- data->hdmi_jack_pin.mask = SND_JACK_LINEOUT;
- /* enable jack detection */
- ret = snd_soc_card_jack_new_pins(card, "HDMI Jack", SND_JACK_LINEOUT,
- &data->hdmi_jack,
- &data->hdmi_jack_pin, 1);
- if (ret) {
- dev_err(card->dev, "Can't new HDMI Jack %d\n", ret);
- return ret;
- }
- ret = snd_soc_component_set_jack(component, &data->hdmi_jack, NULL);
- if (ret && ret != -ENOTSUPP) {
- dev_err(card->dev, "Can't set HDMI Jack %d\n", ret);
- return ret;
- }
- return 0;
- };
- static int imx_hdmi_probe(struct platform_device *pdev)
- {
- struct device_node *np = pdev->dev.of_node;
- bool hdmi_out = of_property_read_bool(np, "hdmi-out");
- bool hdmi_in = of_property_read_bool(np, "hdmi-in");
- struct snd_soc_dai_link_component *dlc;
- struct platform_device *cpu_pdev;
- struct device_node *cpu_np;
- struct imx_hdmi_data *data;
- int ret;
- dlc = devm_kzalloc(&pdev->dev, 3 * sizeof(*dlc), GFP_KERNEL);
- if (!dlc)
- return -ENOMEM;
- cpu_np = of_parse_phandle(np, "audio-cpu", 0);
- if (!cpu_np) {
- dev_err(&pdev->dev, "cpu dai phandle missing or invalid\n");
- ret = -EINVAL;
- goto fail;
- }
- cpu_pdev = of_find_device_by_node(cpu_np);
- if (!cpu_pdev) {
- dev_err(&pdev->dev, "failed to find SAI platform device\n");
- ret = -EINVAL;
- goto fail;
- }
- data = devm_kzalloc(&pdev->dev, sizeof(*data), GFP_KERNEL);
- if (!data) {
- ret = -ENOMEM;
- put_device(&cpu_pdev->dev);
- goto fail;
- }
- data->dai.cpus = &dlc[0];
- data->dai.num_cpus = 1;
- data->dai.platforms = &dlc[1];
- data->dai.num_platforms = 1;
- data->dai.codecs = &dlc[2];
- data->dai.num_codecs = 1;
- data->dai.name = "i.MX HDMI";
- data->dai.stream_name = "i.MX HDMI";
- data->dai.cpus->dai_name = dev_name(&cpu_pdev->dev);
- data->dai.platforms->of_node = cpu_np;
- data->dai.ops = &imx_hdmi_ops;
- data->dai.playback_only = true;
- data->dai.capture_only = false;
- data->dai.init = imx_hdmi_init;
- put_device(&cpu_pdev->dev);
- if (of_node_name_eq(cpu_np, "sai")) {
- data->cpu_priv.sysclk_id[1] = FSL_SAI_CLK_MAST1;
- data->cpu_priv.sysclk_id[0] = FSL_SAI_CLK_MAST1;
- }
- if (of_device_is_compatible(np, "fsl,imx-audio-sii902x")) {
- data->dai_fmt = SND_SOC_DAIFMT_LEFT_J;
- data->cpu_priv.slot_width = 24;
- } else {
- data->dai_fmt = SND_SOC_DAIFMT_I2S;
- data->cpu_priv.slot_width = 32;
- }
- if ((hdmi_out && hdmi_in) || (!hdmi_out && !hdmi_in)) {
- dev_err(&pdev->dev, "Invalid HDMI DAI link\n");
- ret = -EINVAL;
- goto fail;
- }
- if (hdmi_out) {
- data->dai.playback_only = true;
- data->dai.capture_only = false;
- data->dai.codecs->dai_name = "i2s-hifi";
- data->dai.codecs->name = "hdmi-audio-codec.1";
- data->dai.dai_fmt = data->dai_fmt |
- SND_SOC_DAIFMT_NB_NF |
- SND_SOC_DAIFMT_CBC_CFC;
- }
- if (hdmi_in) {
- data->dai.playback_only = false;
- data->dai.capture_only = true;
- data->dai.codecs->dai_name = "i2s-hifi";
- data->dai.codecs->name = "hdmi-audio-codec.2";
- data->dai.dai_fmt = data->dai_fmt |
- SND_SOC_DAIFMT_NB_NF |
- SND_SOC_DAIFMT_CBP_CFP;
- }
- data->card.dapm_widgets = imx_hdmi_widgets;
- data->card.num_dapm_widgets = ARRAY_SIZE(imx_hdmi_widgets);
- data->card.dev = &pdev->dev;
- data->card.owner = THIS_MODULE;
- ret = snd_soc_of_parse_card_name(&data->card, "model");
- if (ret)
- goto fail;
- data->card.num_links = 1;
- data->card.dai_link = &data->dai;
- snd_soc_card_set_drvdata(&data->card, data);
- ret = devm_snd_soc_register_card(&pdev->dev, &data->card);
- if (ret) {
- dev_err(&pdev->dev, "snd_soc_register_card failed (%d)\n", ret);
- goto fail;
- }
- fail:
- of_node_put(cpu_np);
- return ret;
- }
- static const struct of_device_id imx_hdmi_dt_ids[] = {
- { .compatible = "fsl,imx-audio-hdmi", },
- { .compatible = "fsl,imx-audio-sii902x", },
- { /* sentinel */ }
- };
- MODULE_DEVICE_TABLE(of, imx_hdmi_dt_ids);
- static struct platform_driver imx_hdmi_driver = {
- .driver = {
- .name = "imx-hdmi",
- .pm = &snd_soc_pm_ops,
- .of_match_table = imx_hdmi_dt_ids,
- },
- .probe = imx_hdmi_probe,
- };
- module_platform_driver(imx_hdmi_driver);
- MODULE_AUTHOR("Freescale Semiconductor, Inc.");
- MODULE_DESCRIPTION("Freescale i.MX hdmi audio ASoC machine driver");
- MODULE_LICENSE("GPL v2");
- MODULE_ALIAS("platform:imx-hdmi");
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