No CLKOUT DFSDM1 on STM32MP, cannot record with ARECORD

[robin_elecgator]

When loading the device tree below, I see the soundcard in alsa. But I don't see any clock out for the microphones, and I can't record from this device. The devices tree is almost a 1 to 1 copy of the example.

What small thing do I over look?

Arecord -L output

null
    Discard all samples (playback) or generate zero samples (capture)
pulse
    PulseAudio Sound Server
default
    Default ALSA Output (currently PulseAudio Sound Server)
sysdefault:CARD=smartMic
    smartMic,
    Default Audio Device

Arecord --dump-hw-params -f dat

Recording WAVE 'stdin' : Signed 16 bit Little Endian, Rate 48000 Hz, Stereo
HW Params of device "sysdefault:CARD=smartMic":
--------------------
ACCESS:  MMAP_INTERLEAVED MMAP_NONINTERLEAVED MMAP_COMPLEX RW_INTERLEAVED RW_NONINTERLEAVED
FORMAT:  S8 U8 S16_LE S16_BE U16_LE U16_BE S24_LE S24_BE U24_LE U24_BE S32_LE S32_BE U32_LE U32_BE FLOAT_LE FLOAT_BE FLOAT64_LE FLOAT64_BE MU_LAW A_LAW IMA_ADPCM S24_3LE S24_3BE U24_3LE U24_3BE S20_3LE S20_3BE U20_3LE U20_3BE S18_3LE S18_3BE U18_3LE U18_3BE
SUBFORMAT:  STD
SAMPLE_BITS: [4 64]
FRAME_BITS: [4 640000]
CHANNELS: [1 10000]
RATE: [4000 4294967295)
PERIOD_TIME: (31 64000]
PERIOD_SIZE: (0 274877907)
PERIOD_BYTES: (0 4294967295)
PERIODS: (0 4294967295]
BUFFER_TIME: [1 4294967295]
BUFFER_SIZE: [1 1649267441]
BUFFER_BYTES: [1 4294967295]
TICK_TIME: ALL
--------------------
arecord: set_params:1403: Unable to install hw params:
ACCESS:  RW_INTERLEAVED
FORMAT:  S16_LE
SUBFORMAT:  STD
SAMPLE_BITS: 16
FRAME_BITS: 32
CHANNELS: 2
RATE: 48000
PERIOD_TIME: 16000
PERIOD_SIZE: 768
PERIOD_BYTES: 3072
PERIODS: 6
BUFFER_TIME: 96000
BUFFER_SIZE: 4608
BUFFER_BYTES: 18432
TICK_TIME: 0

Soundcard config:

sound_card {
		compatible = "audio-graph-card";
		label = "smartMic";
		dais = <&dfsdm0_port &dfsdm1_port>;
	};
dmic0: dmic-0 {
		compatible = "dmic-codec";
		#sound-dai-cells = <1>;
		status = "okay";
 
		port {
			dmic0_endpoint: endpoint {
				remote-endpoint = <&dfsdm_endpoint0>;
			};
		};
	};
 
dmic1: dmic-1 {
		compatible = "dmic-codec";
		#sound-dai-cells = <1>;
		status = "okay";
 
		port {
			dmic1_endpoint: endpoint {
				remote-endpoint = <&dfsdm_endpoint1>;
			};
		};
	};

PinMux:

 dfsdm_pins_mx: dfsdm_mx-0 {
        pins1 {
            pinmux = <STM32_PINMUX('C', 1, AF3)>, /* DFSDM1_DATIN0 */
                     <STM32_PINMUX('C', 3, AF3)>; /* DFSDM1_DATIN1 */
            bias-disable;
        };
        pins2 {
            pinmux = <STM32_PINMUX('B', 13, AF3)>; /* DFSDM1_CKOUT */					
            bias-disable;
            drive-push-pull;
            slew-rate = <1>;
        };
    };

DFSDM config

&dfsdm{
    pinctrl-names = "default", "sleep";
    pinctrl-0 = <&dfsdm_pins_mx>;
    pinctrl-1 = <&dfsdm_sleep_pins_mx>;
    status = "okay";
 
    /* USER CODE BEGIN dfsdm */
		spi-max-frequency = <4080000>;
 
	clocks = <&rcc DFSDM_K>, <&rcc ADFSDM_K>;
	clock-names = "dfsdm", "audio";
	status = "okay";
	dfsdm0: filter@0 {
		compatible = "st,stm32-dfsdm-dmic";
		st,adc-channels = <0>;
		st,adc-channel-names = "dmic_u1";
		st,adc-channel-types = "SPI_R";
		st,adc-channel-clk-src = "CLKOUT";
		st,filter-order = <3>;
		status = "okay";
 
		asoc_pdm0: dfsdm-dai {
			compatible = "st,stm32h7-dfsdm-dai";
			#sound-dai-cells = <0>;
			io-channels = <&dfsdm0 0>;
			status = "okay";
 
			dfsdm0_port: port {
				#sound-dai-cells = <0>;
				dfsdm_endpoint0: endpoint {
					remote-endpoint = <&dmic0_endpoint>;
				};
			};
		};
	};
 
	dfsdm1: filter@1 {
		compatible = "st,stm32-dfsdm-dmic";
		st,adc-channels = <0>;
		st,adc-channel-names = "dmic_u2";
		st,adc-channel-types = "SPI_F";
		st,adc-channel-clk-src = "CLKOUT";
		st,filter-order = <3>;
		status = "okay";
 
		asoc_pdm1: dfsdm-dai {
			compatible = "st,stm32h7-dfsdm-dai";
			#sound-dai-cells = <0>;
			io-channels = <&dfsdm1 0>;
			status = "okay";
 
			dfsdm1_port: port {
				#sound-dai-cells = <0>;
				dfsdm_endpoint1: endpoint {
					remote-endpoint = <&dmic1_endpoint>;
				};
			};
		};
	};
    /* USER CODE END dfsdm */
};

[Olivier GALLIEN]

Hi @robin_elecgator​ 

dfsdm record via pulse audio you are trying is not yet supported.

Please refer to https://wiki.st.com/stm32mpu/wiki/How_to_record_audio

Hope it help,

Olivier