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mediatek: bananapi-r3: add overlay for ReSpeaker 2-mic hat
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Add DT overlay to allow using the ReSpeaker 2-mic hat connected to
the 26-pin header of the BananaPi BPi-R3.

Supported sample formats: S16_LE, S24_LE, S32_LE
Supported sample rates: 8/12/16/24/32/48/96/192 kHz

          |  BPi-R3  |  ReSpeaker 2-mic
  Signal  |  26-pin  |  40-pin
----------+----------+-------------------
 VCC 5V   |    2     |    2
 I2C SDA  |    3     |    3
 I2C SCL  |    5     |    5
 GND      |    6     |    6
 PCM CLK  |   12     |   12
 PCM FS   |   15     |   35
 PCM DIN  |   26     |   38
 GND      |   25     |   39
 PCM DOUT |   22     |   40

Once connected, install the driver and tell U-Boot to apply the DT
overlay:

opkg kmod-sound-soc-mt7986-wm8960
fw_setenv bootconf_base "config-mt7986a-bananapi-bpi-r3#mt7986a-bananapi-bpi-r3-respeaker-2mics"
reboot

To setup the ReSpeaker for Stereo out on the Headphone plug:

amixer sset 'Right Output Mixer PCM' on
amixer sset 'Left Output Mixer PCM' on
amixer sset 'PCM Playback -6dB' off
amixer sset 'O018 I150_Switch' on
amixer sset 'O019 I151_Switch' on
amixer sset 'O124 I032_Switch' on
amixer sset 'O125 I033_Switch' on
amixer sset 'Headphone' 121
amixer sset 'Playback' 255

Signed-off-by: Daniel Golle <[email protected]>
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@dangowrt
dangowrt committed Dec 11, 2023
1 parent d61b4ec commit 957a092
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Showing 3 changed files with 143 additions and 1 deletion.
4 changes: 3 additions & 1 deletion target/linux/mediatek/image/filogic.mk
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Original file line number Diff line number Diff line change
Expand Up @@ -212,7 +212,9 @@ define Device/bananapi_bpi-r3
DEVICE_MODEL := BPi-R3
DEVICE_DTS := mt7986a-bananapi-bpi-r3
DEVICE_DTS_CONFIG := config-mt7986a-bananapi-bpi-r3
DEVICE_DTS_OVERLAY:= mt7986a-bananapi-bpi-r3-emmc mt7986a-bananapi-bpi-r3-nand mt7986a-bananapi-bpi-r3-nor mt7986a-bananapi-bpi-r3-sd
DEVICE_DTS_OVERLAY:= mt7986a-bananapi-bpi-r3-emmc mt7986a-bananapi-bpi-r3-nand \
mt7986a-bananapi-bpi-r3-nor mt7986a-bananapi-bpi-r3-sd \
mt7986a-bananapi-bpi-r3-respeaker-2mics
DEVICE_DTS_DIR := $(DTS_DIR)/
DEVICE_DTS_LOADADDR := 0x43f00000
DEVICE_PACKAGES := kmod-hwmon-pwmfan kmod-i2c-gpio kmod-mt7986-firmware kmod-sfp kmod-usb3 e2fsprogs f2fsck mkf2fs mt7986-wo-firmware
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65 changes: 65 additions & 0 deletions target/linux/mediatek/patches-5.15/864-arm64-dts-mt7986-add-sound-overlay-for-bpi-r3.patch
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Original file line number Diff line number Diff line change
@@ -0,0 +1,65 @@
--- /dev/null
+++ b/arch/arm64/boot/dts/mediatek/mt7986a-bananapi-bpi-r3-respeaker-2mics.dtso
@@ -0,0 +1,62 @@
+// SPDX-License-Identifier: (GPL-2.0 OR MIT)
+/*
+ * Copyright (C) 2023 MediaTek Inc.
+ * Author: Maso Huang <[email protected]>
+ */
+
+/dts-v1/;
+/plugin/;
+
+/ {
+ compatible = "bananapi,bpi-r3", "mediatek,mt7986a";
+
+ fragment@0 {
+ target-path = "/";
+ __overlay__ {
+ sound_wm8960 {
+ compatible = "mediatek,mt7986-wm8960-sound";
+ audio-routing = "Headphone", "HP_L",
+ "Headphone", "HP_R",
+ "LINPUT1", "AMIC",
+ "RINPUT1", "AMIC";
+
+ status = "okay";
+
+ platform {
+ sound-dai = <&afe>;
+ };
+
+ codec {
+ sound-dai = <&wm8960>;
+ };
+ };
+ };
+ };
+
+ fragment@1 {
+ target = <&i2c0>;
+ __overlay__ {
+ pinctrl-names = "default";
+ pinctrl-0 = <&i2c_pins>;
+ clock-frequency = <400000>;
+ status = "okay";
+
+ wm8960: wm8960@1a {
+ compatible = "wlf,wm8960";
+ reg = <0x1a>;
+ };
+ };
+ };
+
+ fragment@2 {
+ target = <&pio>;
+ __overlay__ {
+ i2c_pins: i2c-pins-3-4 {
+ mux {
+ function = "i2c";
+ groups = "i2c";
+ };
+ };
+ };
+ };
+};
75 changes: 75 additions & 0 deletions target/linux/mediatek/patches-6.1/864-arm64-dts-mt7986-add-sound-overlay-for-bpi-r3.patch
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Original file line number Diff line number Diff line change
@@ -0,0 +1,75 @@
--- /dev/null
+++ b/arch/arm64/boot/dts/mediatek/mt7986a-bananapi-bpi-r3-respeaker-2mics.dtso
@@ -0,0 +1,62 @@
+// SPDX-License-Identifier: (GPL-2.0 OR MIT)
+/*
+ * Copyright (C) 2023 MediaTek Inc.
+ * Author: Maso Huang <[email protected]>
+ */
+
+/dts-v1/;
+/plugin/;
+
+/ {
+ compatible = "bananapi,bpi-r3", "mediatek,mt7986a";
+
+ fragment@0 {
+ target-path = "/";
+ __overlay__ {
+ sound_wm8960 {
+ compatible = "mediatek,mt7986-wm8960-sound";
+ audio-routing = "Headphone", "HP_L",
+ "Headphone", "HP_R",
+ "LINPUT1", "AMIC",
+ "RINPUT1", "AMIC";
+
+ status = "okay";
+
+ platform {
+ sound-dai = <&afe>;
+ };
+
+ codec {
+ sound-dai = <&wm8960>;
+ };
+ };
+ };
+ };
+
+ fragment@1 {
+ target = <&i2c0>;
+ __overlay__ {
+ pinctrl-names = "default";
+ pinctrl-0 = <&i2c_pins>;
+ clock-frequency = <400000>;
+ status = "okay";
+
+ wm8960: wm8960@1a {
+ compatible = "wlf,wm8960";
+ reg = <0x1a>;
+ };
+ };
+ };
+
+ fragment@2 {
+ target = <&pio>;
+ __overlay__ {
+ i2c_pins: i2c-pins-3-4 {
+ mux {
+ function = "i2c";
+ groups = "i2c";
+ };
+ };
+ };
+ };
+};
--- a/arch/arm64/boot/dts/mediatek/Makefile
+++ b/arch/arm64/boot/dts/mediatek/Makefile
@@ -12,6 +12,7 @@ dtb-$(CONFIG_ARCH_MEDIATEK) += mt7986a-b
dtb-$(CONFIG_ARCH_MEDIATEK) += mt7986a-bananapi-bpi-r3-nand.dtbo
dtb-$(CONFIG_ARCH_MEDIATEK) += mt7986a-bananapi-bpi-r3-nor.dtbo
dtb-$(CONFIG_ARCH_MEDIATEK) += mt7986a-bananapi-bpi-r3-sd.dtbo
+dtb-$(CONFIG_ARCH_MEDIATEK) += mt7986a-bananapi-bpi-r3-respeaker-2mics.dtbo
dtb-$(CONFIG_ARCH_MEDIATEK) += mt7986a-rfb.dtb
dtb-$(CONFIG_ARCH_MEDIATEK) += mt7986b-rfb.dtb
dtb-$(CONFIG_ARCH_MEDIATEK) += mt8167-pumpkin.dtb

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