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ASoC: tegra: Support WM8994 by machine driver
Svyatoslav Ryhel <clamor95@gmail.com> says: Add Wolfson Microelectronics WM8994 codec support to the Tegra ASoC machine driver. The WM8994 codec is found on devices like LG Optimus 2X (P990/star) and Samsung Captivate Glide (SGH-i927). Link: https://patch.msgid.link/20261014120148.126160-1-clamor95@gmail.com
This commit is contained in:
Mark Brown
commit
2702a7ca23
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# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
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%YAML 1.2
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---
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$id: http://devicetree.org/schemas/sound/nvidia,tegra-audio-wm8994.yaml#
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$schema: http://devicetree.org/meta-schemas/core.yaml#
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title: NVIDIA Tegra audio complex with WM8994 CODEC
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maintainers:
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- Svyatoslav Ryhel <clamor95@gmail.com>
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allOf:
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- $ref: nvidia,tegra-audio-common.yaml#
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properties:
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compatible:
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items:
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- pattern: '^[a-z0-9]+,tegra-audio-wm8994(-[a-z0-9]+)+$'
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- const: nvidia,tegra-audio-wm8994
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nvidia,audio-routing:
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$ref: /schemas/types.yaml#/definitions/non-unique-string-array
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description: |
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A list of the connections between audio components.
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Each entry is a pair of strings, the first being the connection's sink,
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the second being the connection's source. Valid names for sources and
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sinks are the pins (documented in the binding document),
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and the jacks on the board.
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minItems: 2
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items:
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enum:
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# Board Connectors
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- Headphone Jack
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- Int Spk
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- Earpiece
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- Line Out
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- Mic Jack
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- Int Mic
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- Internal Mic 1
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- Internal Mic 2
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- FM Radio
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# CODEC Pins
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- SPKOUTLP
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- SPKOUTLN
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- SPKOUTRP
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- SPKOUTRN
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- HPOUT1L
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- HPOUT1R
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- HPOUT2P
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- HPOUT2N
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- LINEOUT1P
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- LINEOUT1N
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- LINEOUT2P
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- LINEOUT2N
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- IN1LN
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- IN1LP
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- IN2LN
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- IN2LP:VXRN
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- IN1RN
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- IN1RP
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- IN2RN
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- IN2RP:VXRP
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- DMIC1DAT
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- DMIC2DAT
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- MICBIAS1
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- MICBIAS2
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required:
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- nvidia,i2s-controller
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unevaluatedProperties: false
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examples:
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- |
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#include <dt-bindings/clock/tegra20-car.h>
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#include <dt-bindings/gpio/gpio.h>
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sound {
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compatible = "lg,tegra-audio-wm8994-star",
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"nvidia,tegra-audio-wm8994";
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nvidia,model = "LG Optimus 2X WM8994";
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nvidia,audio-routing =
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"Headphone Jack", "HPOUT1L",
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"Headphone Jack", "HPOUT1R",
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"Int Spk", "SPKOUTLN",
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"Int Spk", "SPKOUTLP",
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"Earpiece", "HPOUT2N",
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"Earpiece", "HPOUT2P",
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"IN2RN", "MICBIAS2",
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"IN2RN", "Mic Jack",
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"IN1LN", "MICBIAS1",
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"IN1LN", "Internal Mic 1",
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"IN1RN", "MICBIAS1",
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"IN1RN", "Internal Mic 2";
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nvidia,i2s-controller = <&tegra_i2s1>;
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nvidia,audio-codec = <&wm8994>;
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nvidia,hp-det-gpios = <&gpio 51 GPIO_ACTIVE_HIGH>;
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nvidia,mic-det-gpios = <&gpio 27 GPIO_ACTIVE_HIGH>;
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nvidia,ext-mic-en-gpios = <&gpio 57 GPIO_ACTIVE_HIGH>;
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nvidia,coupled-mic-hp-det;
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clocks = <&tegra_car TEGRA20_CLK_PLL_A>,
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<&tegra_car TEGRA20_CLK_PLL_A_OUT0>,
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<&tegra_car TEGRA20_CLK_CDEV1>;
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clock-names = "pll_a", "pll_a_out0", "mclk";
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};
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@ -239,6 +239,16 @@ config SND_SOC_TEGRA_WM8962
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boards using the WM8962 codec. Currently, the supported boards are
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Microsoft Surface RT.
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config SND_SOC_TEGRA_WM8994
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tristate "SoC Audio support for Tegra boards using a WM8994 codec"
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depends on I2C && GPIOLIB && MFD_WM8994
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select SND_SOC_TEGRA_MACHINE_DRV
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select SND_SOC_WM8994
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help
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Say Y or M here if you want to add support for SoC audio on Tegra
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boards using the WM8994 codec. Currently, the supported boards are
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LG Optimus X2 P990.
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config SND_SOC_TEGRA_WM9712
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tristate "SoC Audio support for Tegra boards using a WM9712 codec"
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depends on GPIOLIB
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@ -43,10 +43,12 @@ obj-$(CONFIG_SND_SOC_TEGRA210_OPE) += snd-soc-tegra210-ope.o
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# Tegra machine Support
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snd-soc-tegra-wm8903-y := tegra_wm8903.o
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snd-soc-tegra-wm8962-y := tegra_wm8962.o
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snd-soc-tegra-wm8994-y := tegra_wm8994.o
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snd-soc-tegra-machine-y := tegra_asoc_machine.o
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snd-soc-tegra-audio-graph-card-y := tegra_audio_graph_card.o
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obj-$(CONFIG_SND_SOC_TEGRA_WM8903) += snd-soc-tegra-wm8903.o
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obj-$(CONFIG_SND_SOC_TEGRA_WM8962) += snd-soc-tegra-wm8962.o
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obj-$(CONFIG_SND_SOC_TEGRA_WM8994) += snd-soc-tegra-wm8994.o
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obj-$(CONFIG_SND_SOC_TEGRA_MACHINE_DRV) += snd-soc-tegra-machine.o
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obj-$(CONFIG_SND_SOC_TEGRA_AUDIO_GRAPH_CARD) += snd-soc-tegra-audio-graph-card.o
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@ -122,6 +122,8 @@ static const struct snd_soc_dapm_widget tegra_machine_dapm_widgets[] = {
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SND_SOC_DAPM_LINE("Line In Jack", NULL),
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SND_SOC_DAPM_LINE("Line In", NULL),
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SND_SOC_DAPM_LINE("LineIn", NULL),
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SND_SOC_DAPM_LINE("Line Out", NULL),
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SND_SOC_DAPM_INPUT("FM Radio"),
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};
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static const struct snd_kcontrol_new tegra_machine_controls[] = {
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175
sound/soc/tegra/tegra_wm8994.c
Normal file
175
sound/soc/tegra/tegra_wm8994.c
Normal file
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@ -0,0 +1,175 @@
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// SPDX-License-Identifier: GPL-2.0-only
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//
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// tegra_wm8994.c - Tegra machine ASoC driver for boards using WM8994 codec.
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//
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// Copyright (C) 2026 Svyatoslav Ryhel <clamor95@gmail.com>
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//
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// Based on tegra_wm8994 code copyright/by:
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//
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// Author: Sumit Bhattacharya <sumitb@nvidia.com>
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// Copyright (C) 2010-2011 - NVIDIA, Inc.
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//
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// Based on code copyright/by:
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//
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// (c) 2009, 2010 Nvidia Graphics Pvt. Ltd.
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//
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// Copyright 2007 Wolfson Microelectronics PLC.
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// Author: Graeme Gregory
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// graeme.gregory@wolfsonmicro.com or linux@wolfsonmicro.com
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#include <linux/gpio/consumer.h>
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#include <linux/of.h>
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#include <linux/module.h>
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#include <linux/platform_device.h>
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#include <sound/core.h>
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#include <sound/jack.h>
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#include <sound/soc.h>
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#include "../codecs/wm8994.h"
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#include "tegra_asoc_machine.h"
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static struct snd_soc_jack_pin tegra_wm8994_mic_jack_pins[] = {
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{ .pin = "Mic Jack", .mask = SND_JACK_MICROPHONE },
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};
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static unsigned int tegra_wm8994_mclk_rate(unsigned int srate)
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{
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unsigned int mclk;
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switch (srate) {
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case 8000:
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case 16000:
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case 24000:
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case 32000:
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case 48000:
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case 64000:
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case 96000:
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mclk = 12288000;
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break;
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case 11025:
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case 22050:
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case 44100:
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case 88200:
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mclk = 11289600;
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break;
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default:
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mclk = 12000000;
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break;
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}
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return mclk;
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}
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static const struct snd_kcontrol_new tegra_wm8994_controls[] = {
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SOC_DAPM_PIN_SWITCH("Speakers"),
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SOC_DAPM_PIN_SWITCH("Int Spk"),
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SOC_DAPM_PIN_SWITCH("Int Mic"),
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SOC_DAPM_PIN_SWITCH("Headset Mic"),
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SOC_DAPM_PIN_SWITCH("Internal Mic 1"),
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SOC_DAPM_PIN_SWITCH("Internal Mic 2"),
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SOC_DAPM_PIN_SWITCH("Headphones"),
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SOC_DAPM_PIN_SWITCH("Mic Jack"),
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SOC_DAPM_PIN_SWITCH("Line Out"),
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SOC_DAPM_PIN_SWITCH("FM Radio"),
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};
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static int tegra_wm8994_init(struct snd_soc_pcm_runtime *rtd)
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{
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struct tegra_machine *machine = snd_soc_card_get_drvdata(rtd->card);
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int err;
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err = tegra_asoc_machine_init(rtd);
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if (err)
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return err;
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if (!machine->gpiod_mic_det && machine->asoc->add_mic_jack) {
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struct snd_soc_dai *codec_dai = snd_soc_rtd_to_codec(rtd, 0);
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struct snd_soc_component *component = codec_dai->component;
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err = snd_soc_card_jack_new_pins(rtd->card, "Mic Jack",
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SND_JACK_MICROPHONE,
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machine->mic_jack,
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tegra_wm8994_mic_jack_pins,
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ARRAY_SIZE(tegra_wm8994_mic_jack_pins));
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if (err) {
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dev_err(rtd->dev, "Mic Jack creation failed: %d\n", err);
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return err;
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}
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wm8994_mic_detect(component, machine->mic_jack, 1);
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}
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return 0;
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}
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static int tegra_wm8994_remove(struct snd_soc_card *card)
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{
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struct snd_soc_dai_link *link = &card->dai_link[0];
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struct snd_soc_pcm_runtime *rtd = snd_soc_get_pcm_runtime(card, link);
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struct tegra_machine *machine = snd_soc_card_get_drvdata(rtd->card);
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struct snd_soc_dai *codec_dai = snd_soc_rtd_to_codec(rtd, 0);
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struct snd_soc_component *component = codec_dai->component;
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if (!machine->gpiod_mic_det && machine->asoc->add_mic_jack)
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wm8994_mic_detect(component, NULL, 1);
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return 0;
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}
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SND_SOC_DAILINK_DEFS(wm8994_hifi,
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DAILINK_COMP_ARRAY(COMP_EMPTY()),
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DAILINK_COMP_ARRAY(COMP_CODEC(NULL, "wm8994-aif1")),
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DAILINK_COMP_ARRAY(COMP_EMPTY()));
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static struct snd_soc_dai_link tegra_wm8994_dai = {
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.name = "WM8994",
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.stream_name = "WM8994 PCM",
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.init = tegra_wm8994_init,
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.dai_fmt = SND_SOC_DAIFMT_I2S |
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SND_SOC_DAIFMT_NB_NF |
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SND_SOC_DAIFMT_CBC_CFC,
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SND_SOC_DAILINK_REG(wm8994_hifi),
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};
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static struct snd_soc_card snd_soc_tegra_wm8994 = {
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.components = "codec:wm8994",
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.owner = THIS_MODULE,
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.dai_link = &tegra_wm8994_dai,
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.num_links = 1,
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.controls = tegra_wm8994_controls,
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.num_controls = ARRAY_SIZE(tegra_wm8994_controls),
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.remove = tegra_wm8994_remove,
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.fully_routed = true,
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};
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static const struct tegra_asoc_data tegra_wm8994_data = {
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.mclk_rate = tegra_wm8994_mclk_rate,
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.mclk_id = WM8994_SYSCLK_MCLK1,
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.card = &snd_soc_tegra_wm8994,
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.add_common_dapm_widgets = true,
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.add_common_snd_ops = true,
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.add_mic_jack = true,
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.add_hp_jack = true,
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};
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static const struct of_device_id tegra_wm8994_of_match[] = {
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{ .compatible = "nvidia,tegra-audio-wm8994", .data = &tegra_wm8994_data },
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{ },
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};
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MODULE_DEVICE_TABLE(of, tegra_wm8994_of_match);
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static struct platform_driver tegra_wm8994_driver = {
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.driver = {
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.name = "tegra-wm8994",
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.of_match_table = tegra_wm8994_of_match,
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.pm = &snd_soc_pm_ops,
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},
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.probe = tegra_asoc_machine_probe,
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};
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module_platform_driver(tegra_wm8994_driver);
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MODULE_AUTHOR("Svyatoslav Ryhel <clamor95@gmail.com>");
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MODULE_DESCRIPTION("Tegra+WM8994 machine ASoC driver");
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MODULE_LICENSE("GPL");
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