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ASoC: rockchip: Add support for Dummy DAI

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mainly used for multi-dais as channel map.

e.g.

dummy_dai: dummy-dai {
	compatible = "rockchip,dummy-dai";
	#sound-dai-cells = <0>;
};

multi_dais: multi-dais {
	compatible = "rockchip,multi-dais";
	dais = <&i2s_2ch>,<&dummy_dai> ;
	capture,channel-mapping = <2 2>;
	playback,channel-mapping = <2 0>;
	#sound-dai-cells = <0>;
};

&i2s_2ch {
	rockchip,no-dmaengine;
};

Signed-off-by: Sugar Zhang <sugar.zhang@rock-chips.com>
Change-Id: Ie8ead095724ead9ee2995cb1f1640cb57386ad4d
This commit is contained in:
Sugar Zhang
2024-07-19 15:19:17 +08:00
committed by Tao Huang
parent f4760e0891
commit e171dd2bc2
3 changed files with 92 additions and 0 deletions
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6
sound/soc/rockchip/Kconfig
View File

@@ -25,6 +25,12 @@ config SND_SOC_ROCKCHIP_DLP_PCM
Say Y or M if you want to add support for DLP driver for
Rockchip DMA-Based Digital Loopback.
config SND_SOC_ROCKCHIP_DUMMY_DAI
tristate "Rockchip Dummy DAI Driver"
depends on SND_SOC_ROCKCHIP
help
Say Y or M if you want to add support for DUMMY DAI driver.
config SND_SOC_ROCKCHIP_I2S
tristate "Rockchip I2S Device Driver"
depends on HAVE_CLK && SND_SOC_ROCKCHIP

2
sound/soc/rockchip/Makefile
View File

@@ -4,6 +4,7 @@ snd-soc-rockchip-objs := rockchip_utils.o
snd-soc-rockchip-asrc-objs := rockchip_asrc.o
snd-soc-rockchip-dlp-objs := rockchip_dlp.o
snd-soc-rockchip-dlp-pcm-objs := rockchip_dlp_pcm.o
snd-soc-rockchip-dummy-dai-objs := rockchip_dummy_dai.o
snd-soc-rockchip-i2s-objs := rockchip_i2s.o
snd-soc-rockchip-i2s-tdm-objs := rockchip_i2s_tdm.o
snd-soc-rockchip-multi-dais-objs := rockchip_multi_dais.o rockchip_multi_dais_pcm.o
@@ -25,6 +26,7 @@ obj-$(CONFIG_SND_SOC_ROCKCHIP) += snd-soc-rockchip.o
obj-$(CONFIG_SND_SOC_ROCKCHIP_ASRC) += snd-soc-rockchip-asrc.o
obj-$(CONFIG_SND_SOC_ROCKCHIP_DLP) += snd-soc-rockchip-dlp.o
obj-$(CONFIG_SND_SOC_ROCKCHIP_DLP_PCM) += snd-soc-rockchip-dlp-pcm.o
obj-$(CONFIG_SND_SOC_ROCKCHIP_DUMMY_DAI) += snd-soc-rockchip-dummy-dai.o
obj-$(CONFIG_SND_SOC_ROCKCHIP_I2S) += snd-soc-rockchip-i2s.o
obj-$(CONFIG_SND_SOC_ROCKCHIP_I2S_TDM) += snd-soc-rockchip-i2s-tdm.o
obj-$(CONFIG_SND_SOC_ROCKCHIP_MULTI_DAIS) += snd-soc-rockchip-multi-dais.o

84
sound/soc/rockchip/rockchip_dummy_dai.c Normal file
View File

@@ -0,0 +1,84 @@
// SPDX-License-Identifier: GPL-2.0-or-later
/*
* ALSA SoC Audio Layer - Rockchip Dummy Controller driver
*
* Copyright (c) 2024 Rockchip Electronics Co. Ltd.
*/
#include <linux/module.h>
#include <sound/pcm_params.h>
#include <sound/dmaengine_pcm.h>
#define DRV_NAME "rockchip-dummy-dai"
struct rk_dummy_dai_dev {
struct device *dev;
};
static struct snd_soc_dai_driver rockchip_dummy_dai_dai = {
.playback = {
.stream_name = "Playback",
.channels_min = 1,
.channels_max = 512,
.rates = SNDRV_PCM_RATE_8000_384000,
.formats = SNDRV_PCM_FMTBIT_S8 |
SNDRV_PCM_FMTBIT_S16_LE |
SNDRV_PCM_FMTBIT_S24_LE |
SNDRV_PCM_FMTBIT_S32_LE |
SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_LE,
},
.capture = {
.stream_name = "Capture",
.channels_min = 1,
.channels_max = 512,
.rates = SNDRV_PCM_RATE_8000_384000,
.formats = SNDRV_PCM_FMTBIT_S8 |
SNDRV_PCM_FMTBIT_S16_LE |
SNDRV_PCM_FMTBIT_S24_LE |
SNDRV_PCM_FMTBIT_S32_LE |
SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_LE,
},
};
static const struct of_device_id rockchip_dummy_dai_match[] __maybe_unused = {
{ .compatible = "rockchip,dummy-dai", },
{},
};
static const struct snd_soc_component_driver rockchip_dummy_dai_component = {
.name = DRV_NAME,
.legacy_dai_naming = 1,
};
static int rockchip_dummy_dai_probe(struct platform_device *pdev)
{
struct rk_dummy_dai_dev *dummy_dai;
int ret;
dummy_dai = devm_kzalloc(&pdev->dev, sizeof(*dummy_dai), GFP_KERNEL);
if (!dummy_dai)
return -ENOMEM;
dummy_dai->dev = &pdev->dev;
dev_set_drvdata(&pdev->dev, dummy_dai);
ret = devm_snd_soc_register_component(&pdev->dev,
&rockchip_dummy_dai_component,
&rockchip_dummy_dai_dai, 1);
return ret;
}
static struct platform_driver rockchip_dummy_dai_driver = {
.probe = rockchip_dummy_dai_probe,
.driver = {
.name = DRV_NAME,
.of_match_table = of_match_ptr(rockchip_dummy_dai_match),
},
};
module_platform_driver(rockchip_dummy_dai_driver);
MODULE_DESCRIPTION("Rockchip Dummy DAI ASoC Interface");
MODULE_AUTHOR("Sugar Zhang <sugar.zhang@rock-chips.com>");
MODULE_LICENSE("GPL");
MODULE_ALIAS("platform:" DRV_NAME);
MODULE_DEVICE_TABLE(of, rockchip_dummy_dai_match);