General discussion • Raspberry Pi 4 model B external I2S interface not working on pins GPIO18 - 21

Code:

dtparam=i2s=on

Code:

pi@raspberrypi:~ $ aplay -l**** List of PLAYBACK Hardware Devices ****card 0: Headphones [bcm2835 Headphones], device 0: bcm2835 Headphones [bcm2835 Headphones]  Subdevices: 8/8  Subdevice #0: subdevice #0  Subdevice #1: subdevice #1  Subdevice #2: subdevice #2  Subdevice #3: subdevice #3  Subdevice #4: subdevice #4  Subdevice #5: subdevice #5  Subdevice #6: subdevice #6  Subdevice #7: subdevice #7card 1: vc4hdmi0 [vc4-hdmi-0], device 0: MAI PCM i2s-hifi-0 [MAI PCM i2s-hifi-0]  Subdevices: 1/1  Subdevice #0: subdevice #0card 2: vc4hdmi1 [vc4-hdmi-1], device 0: MAI PCM i2s-hifi-0 [MAI PCM i2s-hifi-0]  Subdevices: 1/1  Subdevice #0: subdevice #0pi@raspberrypi:~ $ arecord -l**** List of CAPTURE Hardware Devices ****pi@raspberrypi:~ $ 

Code:

vclog

Code:

pi@raspberrypi:~ $ sudo vclog -m003977.242: arasan: arasan_emmc_open003977.410: arasan: arasan_emmc_set_clock C0: 0x00800000 C1: 0x000e0047 emmc: 200000000 actual: 390625 div: 0x00000100 target: 400000 min: 400000 max: 400000 delay: 5004082.186: arasan: arasan_emmc_set_clock C0: 0x00800000 C1: 0x000e0047 emmc: 200000000 actual: 390625 div: 0x00000100 target: 400000 min: 400000 max: 400000 delay: 5004082.272: arasan: arasan_emmc_set_clock C0: 0x00800f00 C1: 0x000e0047 emmc: 200000000 actual: 390625 div: 0x00000100 target: 400000 min: 390000 max: 400000 delay: 5004114.393: arasan: arasan_emmc_set_clock C0: 0x00800f06 C1: 0x000e0207 emmc: 200000000 actual: 50000000 div: 0x00000002 target: 50000000 min: 0 max: 50000000 delay: 1004122.792: brfs: File read: /mfs/sd/config.txt004123.598: brfs: File read: 1380 bytes004205.777: HDMI1:EDID error reading EDID block 0 attempt 0004206.793: HDMI1:EDID giving up on reading EDID block 0004215.725: brfs: File read: /mfs/sd/config.txt004984.035: gpioman: gpioman_get_pin_num: pin DISPLAY_DSI_PORT not defined004984.792: gpioman: gpioman_get_pin_num: pin DISPLAY_DSI_PORT not defined004986.942: *** Restart logging004986.964: brfs: File read: 1380 bytes005057.078: hdmi: HDMI1:EDID error reading EDID block 0 attempt 0005058.097: hdmi: HDMI1:EDID giving up on reading EDID block 0005063.137: hdmi: HDMI1:EDID error reading EDID block 0 attempt 0005064.153: hdmi: HDMI1:EDID giving up on reading EDID block 0005064.172: hdmi: HDMI:hdmi_get_state is deprecated, use hdmi_get_display_state instead005064.188: HDMI0: hdmi_pixel_encoding: 300000000005064.199: HDMI1: hdmi_pixel_encoding: 300000000008168.070: brfs: File read: /mfs/sd/initramfs7l008168.102: Loaded 'initramfs7l' to 0x0 size 0xff8f35008185.580: initramfs loaded to 0x2e007000 (size 0xff8f35)008195.387: dtb_file 'bcm2711-rpi-4-b.dtb'008195.423: brfs: File read: 16748341 bytes008210.801: brfs: File read: /mfs/sd/bcm2711-rpi-4-b.dtb008210.834: Loaded 'bcm2711-rpi-4-b.dtb' to 0x100 size 0xdb5c008245.071: brfs: File read: 56156 bytes008265.182: brfs: File read: /mfs/sd/overlays/overlay_map.dtb008324.172: brfs: File read: 5423 bytes008330.071: brfs: File read: /mfs/sd/config.txt008330.233: dtparam: i2c_arm=on008352.250: dtparam: i2s=on008372.672: dtparam: spi=on008393.252: dtparam: audio=on008406.177: brfs: File read: 1380 bytes008436.850: brfs: File read: /mfs/sd/overlays/vc4-kms-v3d-pi4.dtbo008593.700: Loaded overlay 'vc4-kms-v3d-pi4'008974.825: brfs: File read: 3913 bytes009005.292: brfs: File read: /mfs/sd/overlays/max98090.dtbo009050.533: brfs: File read: /mfs/sd/cmdline.txt009050.629: Read command line from file 'cmdline.txt':009050.661: 'console=serial0,115200 console=tty1 root=PARTUUID=ba6c761b-02 rootfstype=ext4 fsck.repair=yes rootwait quiet splash plymouth.ignore-serial-consoles cfg80211.ieee80211_regdom=GB'009399.253: brfs: File read: 176 bytes010933.205: brfs: File read: /mfs/sd/kernel7l.img010933.245: Loaded 'kernel7l.img' to 0x8000 size 0x778808010933.305: Device tree loaded to 0x2dff8e00 (size 0xe12e)010941.963: gpioman: gpioman_get_pin_num: pin SDCARD_CONTROL_POWER not defined011050.984: sdram: sdram refresh 1562->6248 (1)014886.853: vchiq_core: vchiq_init_state: slot_zero = 0xcdd80000, is_master = 1014900.733: TV service:host side not connected, dropping notification 0x00000002, 0x00000001, 0x00000010288987.966: sdram: sdram refresh 1562->3124 (2)

Code:

pi@raspberrypi:~ $ ls /dev/snd/by-path  controlC0  controlC1  controlC2  pcmC0D0p  pcmC1D0p  pcmC2D0p  seq  timer

Code:

snd-soc-max98090

Code:

pi@raspberrypi:~ $ lsmod | grep -i i2ssnd_soc_bcm2835_i2s    12288  0snd_soc_core          266240  4 vc4,snd_soc_hdmi_codec,snd_soc_bcm2835_i2s,snd_soc_max98090snd_pcm               126976  7 snd_compress,snd_pcm_dmaengine,snd_soc_hdmi_codec,snd_soc_bcm2835_i2s,snd_soc_max98090,snd_bcm2835,snd_soc_core

Code:

pi@raspberrypi:~ $ lsmod | grep -i max98090snd_soc_max98090       65536  0regmap_i2c             12288  1 snd_soc_max98090snd_soc_core          266240  4 vc4,snd_soc_hdmi_codec,snd_soc_bcm2835_i2s,snd_soc_max98090snd_pcm               126976  7 snd_compress,snd_pcm_dmaengine,snd_soc_hdmi_codec,snd_soc_bcm2835_i2s,snd_soc_max98090,snd_bcm2835,snd_soc_core

Code:

/dts-v1/;/plugin/;/ {    compatible = "brcm,bcm2711";//changed bcm2835    fragment@0 {        target = <&i2c_arm>;        __overlay__ {            #address-cells = <1>;            #size-cells = <0>;            max98090: audio-codec@10 {                compatible = "maxim,max98090";                reg = <0x10>;                interrupt-parent = <&gpx3>;// gpio                interrupts = <2 IRQ_TYPE_EDGE_FALLING>;  // Adjust GPIO as needed                clocks = <&i2s0 0>;                clock-names = "mclk";                #sound-dai-cells = <0>;                maxim,dmic-freq = <2500000>;  // Default digital mic frequency                maxim,micbias = <3>;          // Micbias voltage set to 2.8V            };        };    };    fragment@1 {        target = <&i2s>;        __overlay__ {            status = "okay";        };    };    fragment@2 {        target = <&sound>;        __overlay__ {            status = "okay";            compatible = "simple-audio-card";            simple-audio-card,format = "i2s";            simple-audio-card,bitclock-master = <&dailink_master>;            simple-audio-card,frame-master = <&dailink_master>;            simple-audio-card,cpu {                sound-dai = <&i2s>;            };            dailink_master: simple-audio-card,codec {                sound-dai = <&max98090>;            };        };    };};

Code:

# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause%YAML 1.2---$id: http://devicetree.org/schemas/sound/maxim,max98090.yaml#$schema: http://devicetree.org/meta-schemas/core.yaml#title: Maxim Integrated MAX98090/MAX98091 audio codecsmaintainers:  - Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>description: |  Pins on the device (for linking into audio routes):  MIC1, MIC2, DMICL, DMICR, IN1, IN2, IN3, IN4, IN5, IN6, IN12, IN34, IN56,  HPL, HPR, SPKL, SPKR, RCVL, RCVR, MICBIASallOf:  - $ref: dai-common.yaml#properties:  compatible:    enum:      - maxim,max98090      - maxim,max98091  reg:    maxItems: 1  clocks:    items:      - description: master clock  clock-names:    items:      - const: mclk  interrupts:    maxItems: 1  maxim,dmic-freq:    $ref: /schemas/types.yaml#/definitions/uint32    default: 2500000    description:      DMIC clock frequency  maxim,micbias:    $ref: /schemas/types.yaml#/definitions/uint32    enum: [ 0, 1, 2, 3 ]    default: 3    description: |      Micbias voltage applied to the analog mic, valid voltages value are:        0 - 2.2v        1 - 2.55v        2 - 2.4v        3 - 2.8v  '#sound-dai-cells':    const: 0required:  - compatible  - reg  - interruptsunevaluatedProperties: falseexamples:  - |    #include <dt-bindings/interrupt-controller/irq.h>    i2c {        #address-cells = <1>;        #size-cells = <0>;        audio-codec@10 {            compatible = "maxim,max98090";            reg = <0x10>;            interrupt-parent = <&gpx3>;            interrupts = <2 IRQ_TYPE_EDGE_FALLING>;            clocks = <&i2s0 0>;            clock-names = "mclk";            #sound-dai-cells = <0>;        };    };