Hello !

I try make kernel with ALSA drivers for tlv320aic3401. Platform arm / imx6ul. CPU: Freescale i.MX6UL rev1.2 528 MHz (running at 396 MHz)

Kernel config: $grep SND_ .config |grep -v ^# CONFIG_SND_TIMER=y CONFIG_SND_PCM=y CONFIG_SND_DMAENGINE_PCM=y CONFIG_SND_HWDEP=y CONFIG_SND_RAWMIDI=y CONFIG_SND_COMPRESS_OFFLOAD=y CONFIG_SND_JACK=y CONFIG_SND_SUPPORT_OLD_API=y CONFIG_SND_VERBOSE_PROCFS=y CONFIG_SND_VERBOSE_PRINTK=y CONFIG_SND_DEBUG=y CONFIG_SND_DEBUG_VERBOSE=y CONFIG_SND_ARM=y CONFIG_SND_SPI=y CONFIG_SND_USB=y CONFIG_SND_USB_AUDIO=y CONFIG_SND_SOC=y CONFIG_SND_SOC_GENERIC_DMAENGINE_PCM=y CONFIG_SND_SOC_FSL_ASRC=y CONFIG_SND_SOC_FSL_SAI=y CONFIG_SND_SOC_FSL_SSI=y CONFIG_SND_SOC_FSL_ESAI=y CONFIG_SND_SOC_IMX_PCM_DMA=y CONFIG_SND_SOC_IMX_AUDMUX=y CONFIG_SND_IMX_SOC=y CONFIG_SND_SOC_IMX_PCM_FIQ=y CONFIG_SND_SOC_FSL_ASOC_CARD=y CONFIG_SND_SOC_IMX_TLV320AIC3X=y CONFIG_SND_SOC_I2C_AND_SPI=y CONFIG_SND_SOC_TLV320AIC3X=y

$uname -a Linux myd-y6ul14x14 4.1.15+ #20 SMP PREEMPT Thu Dec 27 16:00:37 +07 2018 armv7l GNU/Linux

dmesg / i2c:

imx-i2c 21a4000.i2c: <i2c_imx_probe> i2c i2c-1: adapter [21a4000.i2c] registered i2c i2c-1: of_i2c: walking child nodes i2c i2c-1: of_i2c: register /soc/aips-bus@02100000/i2c@021a4000/tlv320aic3104@18 i2c 1-0018: uevent i2c i2c-1: client [tlv320aic3104] registered with bus id 1-0018 i2c i2c-1: of_i2c: register /soc/aips-bus@02100000/i2c@021a4000/rtc@68 i2c 1-0068: uevent i2c i2c-1: client [ds1307] registered with bus id 1-0068 i2c i2c-1: claimed irq 228 i2c i2c-1: device resources: [mem 0x021a4000-0x021a7fff] i2c i2c-1: adapter name: "21a4000.i2c" i2c i2c-1: IMX I2C adapter registered i2c i2c-1: can't request DMA tx channel i2c i2c-1: can't use DMA

I2C physic work fine: i can access to ds1307, and tlv320 may detect with i2cdetect (if disable tlv320 in DTS).

On console, dmesg / tlv320: .... of_get_named_gpiod_flags: parsed 'gpio-reset' property of node '/soc/aips-bus@02100000/i2c@021a4000/tlv320aic3104@18[0]' - status (0) aic3x_i2c_probe: model=3 1-0018 supply IOVDD not found, using dummy regulator 1-0018 supply DVDD not found, using dummy regulator 1-0018 supply AVDD not found, using dummy regulator 1-0018 supply DRVDD not found, using dummy regulator i2c-core: driver [tlv320aic3x-codec] registered fsl-asrc 2034000.asrc: driver registered ... tlv320aic3x sound: tlv320aic3x-hifi <-> 202c000.sai mapping ok ... ALSA device list: #0: tlv320-audio-U ....

Device Tree Source:

&i2c2 { clock_frequency = <100000>; pinctrl-names = "default"; pinctrl-0 = <&pinctrl_i2c2>; status = "okay";

codec: tlv320aic3104@18 { /* ai3x-micbias-vg = <2>; */ compatible = "ti,tlv320aic3104"; pinctrl-names = "default"; pinctrl-0 = <&pinctrl_gpio_key>; reg = <0x18>; gpio-reset = <&gpio5 0 GPIO_ACTIVE_LOW>;

clocks = <&clks IMX6UL_CLK_SAI2>; clock-names = "mclk"; /* clock-frequency = <19200000>; */ status = "okay"; }; ..... };

/ { ..... sound { compatible = "fsl,imx-audio-tlv320aic3x"; model = "tlv320-audio-U"; cpu-dai = <&sai2>; audio-codec = <&codec>; ssi-controller = <&sai2>; mux-int-port = <2>; /* 1, 2, 7 - SSI */ mux-ext-port = <5>; /* 3-6, IOMUX */ audio-routing = "LINE1L", "Mic Jack", "Headphone Jack", "HPLOUT", "Headphone Jack", "HPROUT", "Mic Jack", "Mic Bias"; }; ..... }

Machine driver imx-audio-tlv320aic3x.c not present in kernel sources, I try some version from Inet. At any case codec driver sound/soc/codec/tlv320aic3x.c call procedure snd_soc_write() for init codec registers, but no any messages from i2c for address 0x18 in dmesg or /var/log/messages. In kernel config i2c debug messages enable:

CONFIG_I2C_DEBUG_CORE=y CONFIG_I2C_DEBUG_ALGO=y CONFIG_I2C_DEBUG_BUS=y

But if I run aplay:

#aplay -vvv x.wav

Playing WAVE 'x.wav' : Signed 16 bit Little Endian, Rate 44100 Hz, Stereo Plug PCM: Direct Stream Mixing PCM Its setup is: stream : PLAYBACK access : RW_INTERLEAVED format : S16_LE subformat : STD channels : 2 rate : 44100 exact rate : 44100 (44100/1) msbits : 16 buffer_size : 15876 period_size : 1764 period_time : 40000 tstamp_mode : NONE tstamp_type : MONOTONIC period_step : 1 avail_min : 1764 period_event : 0 start_threshold : 15876 stop_threshold : 15876 silence_threshold: 0 silence_size : 0 boundary : 2080899072 Hardware PCM card 0 'tlv320-audio-U' device 0 subdevice 0 Its setup is: stream : PLAYBACK access : MMAP_INTERLEAVED format : S16_LE subformat : STD channels : 2 rate : 44100 exact rate : 44100 (44100/1) msbits : 16 buffer_size : 15876 period_size : 1764 period_time : 40000 tstamp_mode : ENABLE tstamp_type : MONOTONIC period_step : 1 avail_min : 1764 period_event : 0 start_threshold : 1 stop_threshold : 2080899072 silence_threshold: 0 silence_size : 2080899072 boundary : 2080899072 appl_ptr : 0 hw_ptr : 0 Max peak (3528 samples): 0x00000000 # 0% Max peak (3528 samples): 0x00000285 # 1% Max peak (3528 samples): 0x000003dd # 3% Max peak (3528 samples): 0x000004b8 # 3% Max peak (3528 samples): 0x00001739 #### 18% Max peak (3528 samples): 0x0000068d ## 5% Max peak (3528 samples): 0x0000058f # 4% Max peak (3528 samples): 0x00000534 # 4% Max peak (3528 samples): 0x000004a3 # 3%

Then in /var/log/messages append some messages, like this: Dec 27 09:29:39 myd-y6ul14x14 user.debug kernel: i2c i2c-1: master_xfer[0] W, addr=0x18, len=2 and in I2C wire I see some pulses.

And then aplay is locked. :( No pulses at SAI.

Questions: 1) It problem may occur due to my error in DTS ? 2) snd_soc_write() / snd_soc_read() do call direct to i2c or more complex way ? For what reason can request not always reach i2c? 3) Any advice ?

Thank you!