Unverified Commit 39f8405c authored by Shengjiu Wang's avatar Shengjiu Wang Committed by Mark Brown
Browse files

ASoC: imx-rpmsg: Add machine driver for audio base on rpmsg 



The platform device is not registered by device tree or
cpu dai driver, it is registered by the rpmsg channel,
So add a dedicated machine driver to handle this case.

Signed-off-by: default avatarShengjiu Wang <shengjiu.wang@nxp.com>
Link: https://lore.kernel.org/r/1615516725-4975-7-git-send-email-shengjiu.wang@nxp.com


Signed-off-by: default avatarMark Brown <broonie@kernel.org>
parent 3c00eceb

sound/soc/fsl/Kconfig

+11 −0
Original line number Diff line number Diff line
@@ -337,6 +337,17 @@ config SND_SOC_IMX_HDMI 
	  Say Y if you want to add support for SoC audio on an i.MX board with

	  IMX HDMI.



config SND_SOC_IMX_RPMSG

	tristate "SoC Audio support for i.MX boards with rpmsg"

	depends on RPMSG

	select SND_SOC_IMX_PCM_RPMSG

	select SND_SOC_IMX_AUDIO_RPMSG

	help

	  SoC Audio support for i.MX boards with rpmsg.

	  There should be rpmsg devices defined in other core (M core)

	  Say Y if you want to add support for SoC audio on an i.MX board with

	  a rpmsg devices.



endif # SND_IMX_SOC



endmenu

sound/soc/fsl/Makefile

+2 −0
Original line number Diff line number Diff line
@@ -70,6 +70,7 @@ 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

snd-soc-imx-rpmsg-objs := imx-rpmsg.o



obj-$(CONFIG_SND_SOC_EUKREA_TLV320) += snd-soc-eukrea-tlv320.o

obj-$(CONFIG_SND_SOC_IMX_ES8328) += snd-soc-imx-es8328.o
@@ -77,3 +78,4 @@ obj-$(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

obj-$(CONFIG_SND_SOC_IMX_RPMSG) += snd-soc-imx-rpmsg.o

sound/soc/fsl/imx-rpmsg.c

0 → 100644
+150 −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 <linux/of_reserved_mem.h>

#include <linux/i2c.h>

#include <linux/of_gpio.h>

#include <linux/slab.h>

#include <linux/gpio.h>

#include <linux/clk.h>

#include <sound/soc.h>

#include <sound/jack.h>

#include <sound/control.h>

#include <sound/pcm_params.h>

#include <sound/soc-dapm.h>

#include "imx-pcm-rpmsg.h"



struct imx_rpmsg {

	struct snd_soc_dai_link dai;

	struct snd_soc_card card;

};



static const struct snd_soc_dapm_widget imx_rpmsg_dapm_widgets[] = {

	SND_SOC_DAPM_HP("Headphone Jack", NULL),

	SND_SOC_DAPM_SPK("Ext Spk", NULL),

	SND_SOC_DAPM_MIC("Mic Jack", NULL),

	SND_SOC_DAPM_MIC("Main MIC", NULL),

};



static int imx_rpmsg_probe(struct platform_device *pdev)

{

	struct snd_soc_dai_link_component *dlc;

	struct device *dev = pdev->dev.parent;

	/* rpmsg_pdev is the platform device for the rpmsg node that probed us */

	struct platform_device *rpmsg_pdev = to_platform_device(dev);

	struct device_node *np = rpmsg_pdev->dev.of_node;

	struct of_phandle_args args;

	struct imx_rpmsg *data;

	int ret = 0;



	dlc = devm_kzalloc(&pdev->dev, 3 * sizeof(*dlc), GFP_KERNEL);

	if (!dlc)

		return -ENOMEM;



	data = devm_kzalloc(&pdev->dev, sizeof(*data), GFP_KERNEL);

	if (!data) {

		ret = -ENOMEM;

		goto fail;

	}



	ret = of_reserved_mem_device_init_by_idx(&pdev->dev, np, 0);

	if (ret)

		dev_warn(&pdev->dev, "no reserved DMA memory\n");



	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 = "rpmsg hifi";

	data->dai.stream_name = "rpmsg hifi";

	data->dai.dai_fmt = SND_SOC_DAIFMT_I2S |

			    SND_SOC_DAIFMT_NB_NF |

			    SND_SOC_DAIFMT_CBS_CFS;



	/* Optional codec node */

	ret = of_parse_phandle_with_fixed_args(np, "audio-codec", 0, 0, &args);

	if (ret) {

		data->dai.codecs->dai_name = "snd-soc-dummy-dai";

		data->dai.codecs->name = "snd-soc-dummy";

	} else {

		data->dai.codecs->of_node = args.np;

		ret = snd_soc_get_dai_name(&args, &data->dai.codecs->dai_name);

		if (ret) {

			dev_err(&pdev->dev, "Unable to get codec_dai_name\n");

			goto fail;

		}

	}



	data->dai.cpus->dai_name = dev_name(&rpmsg_pdev->dev);

	data->dai.platforms->name = IMX_PCM_DRV_NAME;

	data->dai.playback_only = true;

	data->dai.capture_only = true;

	data->card.num_links = 1;

	data->card.dai_link = &data->dai;



	if (of_property_read_bool(np, "fsl,rpmsg-out"))

		data->dai.capture_only = false;



	if (of_property_read_bool(np, "fsl,rpmsg-in"))

		data->dai.playback_only = false;



	if (data->dai.playback_only && data->dai.capture_only) {

		dev_err(&pdev->dev, "no enabled rpmsg DAI link\n");

		ret = -EINVAL;

		goto fail;

	}



	data->card.dev = &pdev->dev;

	data->card.owner = THIS_MODULE;

	data->card.dapm_widgets = imx_rpmsg_dapm_widgets;

	data->card.num_dapm_widgets = ARRAY_SIZE(imx_rpmsg_dapm_widgets);

	/*

	 * Inoder to use common api to get card name and audio routing.

	 * Use parent of_node for this device, revert it after finishing using

	 */

	data->card.dev->of_node = np;



	ret = snd_soc_of_parse_card_name(&data->card, "model");

	if (ret)

		goto fail;



	if (of_property_read_bool(np, "audio-routing")) {

		ret = snd_soc_of_parse_audio_routing(&data->card, "audio-routing");

		if (ret) {

			dev_err(&pdev->dev, "failed to parse audio-routing: %d\n", ret);

			goto fail;

		}

	}



	platform_set_drvdata(pdev, &data->card);

	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:

	pdev->dev.of_node = NULL;

	return ret;

}



static struct platform_driver imx_rpmsg_driver = {

	.driver = {

		.name = "imx-audio-rpmsg",

		.owner = THIS_MODULE,

		.pm = &snd_soc_pm_ops,

	},

	.probe = imx_rpmsg_probe,

};

module_platform_driver(imx_rpmsg_driver);



MODULE_DESCRIPTION("Freescale SoC Audio RPMSG Machine Driver");

MODULE_AUTHOR("Shengjiu Wang <shengjiu.wang@nxp.com>");

MODULE_ALIAS("platform:imx-audio-rpmsg");

MODULE_LICENSE("GPL v2");