Unverified Commit e37a0c31 authored by Jerome Brunet's avatar Jerome Brunet Committed by Mark Brown
Browse files

ASoC: meson: gx: add sound card support 



Add support for the sound card used on the amlogic GX SoC family

Signed-off-by: default avatarJerome Brunet <jbrunet@baylibre.com>
Link: https://lore.kernel.org/r/20200213155159.3235792-10-jbrunet@baylibre.com


Signed-off-by: default avatarMark Brown <broonie@kernel.org>
parent fd00366b

sound/soc/meson/Kconfig

+7 −0
Original line number Diff line number Diff line
@@ -101,6 +101,13 @@ config SND_MESON_CARD_UTILS 
config SND_MESON_CODEC_GLUE

	tristate



config SND_MESON_GX_SOUND_CARD

	tristate "Amlogic GX Sound Card Support"

	select SND_MESON_CARD_UTILS

	imply SND_MESON_AIU

	help

	  Select Y or M to add support for the GXBB/GXL SoC sound card



config SND_MESON_G12A_TOHDMITX

	tristate "Amlogic G12A To HDMI TX Control Support"

	select REGMAP_MMIO

sound/soc/meson/Makefile

+2 −0
Original line number Diff line number Diff line
@@ -21,6 +21,7 @@ snd-soc-meson-axg-spdifout-objs := axg-spdifout.o 
snd-soc-meson-axg-pdm-objs := axg-pdm.o

snd-soc-meson-card-utils-objs := meson-card-utils.o

snd-soc-meson-codec-glue-objs := meson-codec-glue.o

snd-soc-meson-gx-sound-card-objs := gx-card.o

snd-soc-meson-g12a-tohdmitx-objs := g12a-tohdmitx.o



obj-$(CONFIG_SND_MESON_AIU) += snd-soc-meson-aiu.o
@@ -37,4 +38,5 @@ obj-$(CONFIG_SND_MESON_AXG_SPDIFOUT) += snd-soc-meson-axg-spdifout.o 
obj-$(CONFIG_SND_MESON_AXG_PDM) += snd-soc-meson-axg-pdm.o

obj-$(CONFIG_SND_MESON_CARD_UTILS) += snd-soc-meson-card-utils.o

obj-$(CONFIG_SND_MESON_CODEC_GLUE) += snd-soc-meson-codec-glue.o

obj-$(CONFIG_SND_MESON_GX_SOUND_CARD) += snd-soc-meson-gx-sound-card.o

obj-$(CONFIG_SND_MESON_G12A_TOHDMITX) += snd-soc-meson-g12a-tohdmitx.o

sound/soc/meson/gx-card.c

0 → 100644
+141 −0
Original line number Diff line number Diff line 
// SPDX-License-Identifier: (GPL-2.0 OR MIT)

//

// Copyright (c) 2020 BayLibre, SAS.

// Author: Jerome Brunet <jbrunet@baylibre.com>



#include <linux/module.h>

#include <linux/of_platform.h>

#include <sound/soc.h>

#include <sound/soc-dai.h>



#include "meson-card.h"



struct gx_dai_link_i2s_data {

	unsigned int mclk_fs;

};



/*

 * Base params for the codec to codec links

 * Those will be over-written by the CPU side of the link

 */

static const struct snd_soc_pcm_stream codec_params = {

	.formats = SNDRV_PCM_FMTBIT_S24_LE,

	.rate_min = 5525,

	.rate_max = 192000,

	.channels_min = 1,

	.channels_max = 8,

};



static int gx_card_i2s_be_hw_params(struct snd_pcm_substream *substream,

				    struct snd_pcm_hw_params *params)

{

	struct snd_soc_pcm_runtime *rtd = substream->private_data;

	struct meson_card *priv = snd_soc_card_get_drvdata(rtd->card);

	struct gx_dai_link_i2s_data *be =

		(struct gx_dai_link_i2s_data *)priv->link_data[rtd->num];



	return meson_card_i2s_set_sysclk(substream, params, be->mclk_fs);

}



static const struct snd_soc_ops gx_card_i2s_be_ops = {

	.hw_params = gx_card_i2s_be_hw_params,

};



static int gx_card_parse_i2s(struct snd_soc_card *card,

			     struct device_node *node,

			     int *index)

{

	struct meson_card *priv = snd_soc_card_get_drvdata(card);

	struct snd_soc_dai_link *link = &card->dai_link[*index];

	struct gx_dai_link_i2s_data *be;



	/* Allocate i2s link parameters */

	be = devm_kzalloc(card->dev, sizeof(*be), GFP_KERNEL);

	if (!be)

		return -ENOMEM;

	priv->link_data[*index] = be;



	/* Setup i2s link */

	link->ops = &gx_card_i2s_be_ops;

	link->dai_fmt = meson_card_parse_daifmt(node, link->cpus->of_node);



	of_property_read_u32(node, "mclk-fs", &be->mclk_fs);



	return 0;

}



static int gx_card_cpu_identify(struct snd_soc_dai_link_component *c,

				char *match)

{

	if (of_device_is_compatible(c->of_node, DT_PREFIX "aiu")) {

		if (strstr(c->dai_name, match))

			return 1;

	}



	/* dai not matched */

	return 0;

}



static int gx_card_add_link(struct snd_soc_card *card, struct device_node *np,

			    int *index)

{

	struct snd_soc_dai_link *dai_link = &card->dai_link[*index];

	struct snd_soc_dai_link_component *cpu;

	int ret;



	cpu = devm_kzalloc(card->dev, sizeof(*cpu), GFP_KERNEL);

	if (!cpu)

		return -ENOMEM;



	dai_link->cpus = cpu;

	dai_link->num_cpus = 1;



	ret = meson_card_parse_dai(card, np, &dai_link->cpus->of_node,

				   &dai_link->cpus->dai_name);

	if (ret)

		return ret;



	if (gx_card_cpu_identify(dai_link->cpus, "FIFO"))

		ret = meson_card_set_fe_link(card, dai_link, np, true);

	else

		ret = meson_card_set_be_link(card, dai_link, np);



	if (ret)

		return ret;



	/* Check if the cpu is the i2s encoder and parse i2s data */

	if (gx_card_cpu_identify(dai_link->cpus, "I2S Encoder"))

		ret = gx_card_parse_i2s(card, np, index);



	/* Or apply codec to codec params if necessary */

	else if (gx_card_cpu_identify(dai_link->cpus, "CODEC CTRL"))

		dai_link->params = &codec_params;



	return ret;

}



static const struct meson_card_match_data gx_card_match_data = {

	.add_link = gx_card_add_link,

};



static const struct of_device_id gx_card_of_match[] = {

	{

		.compatible = "amlogic,gx-sound-card",

		.data = &gx_card_match_data,

	}, {}

};

MODULE_DEVICE_TABLE(of, gx_card_of_match);



static struct platform_driver gx_card_pdrv = {

	.probe = meson_card_probe,

	.remove = meson_card_remove,

	.driver = {

		.name = "gx-sound-card",

		.of_match_table = gx_card_of_match,

	},

};

module_platform_driver(gx_card_pdrv);



MODULE_DESCRIPTION("Amlogic GX ALSA machine driver");

MODULE_AUTHOR("Jerome Brunet <jbrunet@baylibre.com>");

MODULE_LICENSE("GPL v2");