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