ASoC: fsl: Add imx-hdmi machine driver (6a5f850a) · Commits · EulixOS / Software / Kernel

sound/soc/fsl/Kconfig

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		@@ -305,6 +305,18 @@ config SND_SOC_IMX_AUDMIX
		Say Y if you want to add support for SoC audio on an i.MX board with
		an Audio Mixer.

		config SND_SOC_IMX_HDMI
		tristate "SoC Audio support for i.MX boards with HDMI port"
		select SND_SOC_FSL_SAI
		select SND_SOC_FSL_AUD2HTX
		select SND_SOC_HDMI_CODEC
		help
		ALSA SoC Audio support with HDMI feature for Freescale SoCs that have
		SAI/AUD2HTX and connect with internal HDMI IP or external module
		SII902X.
		Say Y if you want to add support for SoC audio on an i.MX board with
		IMX HDMI.

		endif # SND_IMX_SOC

		endmenu

sound/soc/fsl/Makefile

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		@@ -65,9 +65,11 @@ snd-soc-imx-es8328-objs := imx-es8328.o
		snd-soc-imx-sgtl5000-objs := imx-sgtl5000.o
		snd-soc-imx-spdif-objs := imx-spdif.o
		snd-soc-imx-audmix-objs := imx-audmix.o
		snd-soc-imx-hdmi-objs := imx-hdmi.o

		obj-$(CONFIG_SND_SOC_EUKREA_TLV320) += snd-soc-eukrea-tlv320.o
		obj-$(CONFIG_SND_SOC_IMX_ES8328) += snd-soc-imx-es8328.o
		obj-$(CONFIG_SND_SOC_IMX_SGTL5000) += snd-soc-imx-sgtl5000.o
		obj-$(CONFIG_SND_SOC_IMX_SPDIF) += snd-soc-imx-spdif.o
		obj-$(CONFIG_SND_SOC_IMX_AUDMIX) += snd-soc-imx-audmix.o
		obj-$(CONFIG_SND_SOC_IMX_HDMI) += snd-soc-imx-hdmi.o

sound/soc/fsl/imx-hdmi.c

0 → 100644

+236 −0

Original line number	Diff line number	Diff line
		// 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_freq: SYSCLK rates for set_sysclk()
		* @sysclk_dir: SYSCLK directions for set_sysclk()
		* @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 {
		unsigned long sysclk_freq[2];
		u32 sysclk_dir[2];
		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 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(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 != -EOPNOTSUPP) {
		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;
		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;

		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");
		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_CBS_CFS;
		}

		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_CBM_CFM;
		}

		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:
		if (cpu_np)
		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",
		.owner = THIS_MODULE,
		.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");