[问答]

imx8mm sai和alsa问题求解

问答对人有帮助，内容完整，我也想知道答案 0 大家好，第一件事：我已经搜索过了，但我没有找到任何有用的东西，所以如果这个问题已经解决，我想道歉，在这种情况下，如果你们能指出我正确的帖子，我很乐意关闭这个帖子并标记它解决了。我们公司正在开发基于 imx8mm SOC 的开发板（目前我们正在开发 Kontron 开发板）。我们的目标之一是拥有一个至少有 4 个输入和 4 个输出（32 位样本）的 ALSA 音频设备，所以我正在尝试创建一个设备树并生成所有必要的内核补丁。与此同时，我们正在使用 Kontron 开发板和 Yocto BSP 来创建操作系统，现在我被正确编译的设备树困住了，但我看不到我的 ALSA 简单声卡。我们计划使用的 SAI 设备是 SAI3，将 imx8mm 设置为主时钟（我不知道是否是这种情况——我对此表示怀疑——但我们的开发板没有暴露我们制作 TDM 音频所需的 SAI 引脚，所以我可以执行的唯一测试是在 ALSA 下查看 TDM 设备并尝试使用它）。我们正在尝试使用内核 V5.10，这是自定义设备树文件 /* * imx8mm custom board device tree file / /dts-v1/; #include "imx8mm-kontron-n801x-som.dtsi" #include / { model = "Custom Kontron i.MX8MM board"; compatible = "kontron,imx8mm-n801x-s", "kontron,imx8mm-n801x-som", "kontron,kontron-mx8mm", "fsl,imx8mm"; aliases { ethernet1 = &usbnet; }; / fixed crystal dedicated to mcp2515 / osc_can: clock-osc-can { compatible = "fixed-clock"; #clock-cells = <0>; clock-frequency = <16000000>; clock-output-names = "osc-can"; }; leds { compatible = "gpio-leds"; pinctrl-names = "default"; pinctrl-0 = <&pinctrl_gpio_led>; led1 { label = "led1"; gpios = <&gpio4 17 GPIO_ACTIVE_LOW>; linux,default-trigger = "heartbeat"; }; led2 { label = "led2"; gpios = <&gpio4 19 GPIO_ACTIVE_LOW>; }; led3 { label = "led3"; gpios = <&gpio4 18 GPIO_ACTIVE_LOW>; }; led4 { label = "led4"; gpios = <&gpio4 8 GPIO_ACTIVE_LOW>; }; led5 { label = "led5"; gpios = <&gpio4 9 GPIO_ACTIVE_LOW>; }; led6 { label = "led6"; gpios = <&gpio4 7 GPIO_ACTIVE_LOW>; }; }; reg_rst_eth2: regulator-rst-eth2 { compatible = "regulator-fixed"; regulator-name = "rst-usb-eth2"; pinctrl-names = "default"; pinctrl-0 = <&pinctrl_usb_eth2>; gpio = <&gpio3 2 GPIO_ACTIVE_HIGH>; enable-active-high; regulator-always-on; }; reg_vdd_5v: regulator-5v { compatible = "regulator-fixed"; regulator-name = "vdd-5v"; regulator-min-microvolt = <5000000>; regulator-max-microvolt = <5000000>; regulator-always-on; }; codec_dummy: codec_dummy { compatible = "linux,snd-soc-dummy"; #sound-dai-cells = <0>; status = "okay"; }; sound-sai3sound { compatible = "simple-audio-card"; simple-audio-card,name = "I2S Audio"; simple-audio-card,format = "i2s"; simple-audio-card,bitclock-master = <&snd_cpu>; simple-audio-card,frame-master = <&snd_cpu>; status = "okay"; snd_cpu: simple-audio-card,cpu { sound-dai = <&sai3 0>; dai-tdm-slot-num = <8>; dai-tdm-slot-width = <32>; }; snd_codec: simple-audio-card,codec { sound-dai = <&codec_dummy>; }; }; }; &fec1 { pinctrl-names = "default"; pinctrl-0 = <&pinctrl_enet>; phy-connection-type = "rgmii-rxid"; phy-handle = <ðphy>; status = "okay"; mdio { #address-cells = <1>; #size-cells = <0>; ethphy: ethernet-phy@0 { compatible = "ethernet-phy-id0007.0570"; reg = <0>; reset-assert-us = <100>; reset-deassert-us = <100>; reset-gpios = <&gpio4 27 GPIO_ACTIVE_LOW>; vsc8531,led-0-mode = ; vsc8531,led-1-mode = ; vsc8531,led-0-combine-disable; }; }; }; &uart1 { pinctrl-names = "default"; pinctrl-0 = <&pinctrl_uart1>; uart-has-rtscts; status = "okay"; }; // &uart2 { // pinctrl-names = "default"; // pinctrl-0 = <&pinctrl_uart2>; // linux,rs485-enabled-at-boot-time; // uart-has-rtscts; // status = "okay"; // }; &usbotg1 { dr_mode = "otg"; over-current-active-low; status = "okay"; }; &usbotg2 { dr_mode = "host"; disable-over-current; #address-cells = <1>; #size-cells = <0>; status = "okay"; usb1@1 { compatible = "usb424,9514"; reg = <1>; #address-cells = <1>; #size-cells = <0>; usbnet: usbether@1 { compatible = "usb424,ec00"; reg = <1>; local-mac-address = [ 00 00 00 00 00 00 ]; }; }; }; &usdhc2 { pinctrl-names = "default", "state_100mhz", "state_200mhz"; pinctrl-0 = <&pinctrl_usdhc2>; pinctrl-1 = <&pinctrl_usdhc2_100mhz>; pinctrl-2 = <&pinctrl_usdhc2_200mhz>; vmmc-supply = <®_vdd_3v3>; vqmmc-supply = <®_nvcc_sd>; cd-gpios = <&gpio2 12 GPIO_ACTIVE_LOW>; status = "okay"; }; &iomuxc { pinctrl-names = "default"; pinctrl-0 = <&pinctrl_gpio>; pinctrl_adv7535: adv7535grp { fsl,pins = < MX8MM_IOMUXC_SAI1_TXD4_GPIO4_IO16 0x19 >; }; pinctrl_can: cangrp { fsl,pins = < MX8MM_IOMUXC_SAI3_RXFS_GPIO4_IO28 0x19 >; }; pinctrl_dsi_sel: dsiselgrp { fsl,pins = < MX8MM_IOMUXC_SAI1_TXD2_GPIO4_IO14 0x19 >; }; pinctrl_dsi_oe: dsioegrp { fsl,pins = < MX8MM_IOMUXC_SAI1_TXD3_GPIO4_IO15 0x19 >; }; pinctrl_ecspi2: ecspi2grp { fsl,pins = < MX8MM_IOMUXC_ECSPI2_MISO_ECSPI2_MISO 0x82 MX8MM_IOMUXC_ECSPI2_MOSI_ECSPI2_MOSI 0x82 MX8MM_IOMUXC_ECSPI2_SCLK_ECSPI2_SCLK 0x82 MX8MM_IOMUXC_ECSPI2_SS0_GPIO5_IO13 0x19 >; }; pinctrl_ecspi3: ecspi3grp { fsl,pins = < MX8MM_IOMUXC_UART2_RXD_ECSPI3_MISO 0x82 MX8MM_IOMUXC_UART1_TXD_ECSPI3_MOSI 0x82 MX8MM_IOMUXC_UART1_RXD_ECSPI3_SCLK 0x82 MX8MM_IOMUXC_UART2_TXD_GPIO5_IO25 0x19 >; }; pinctrl_enet: enetgrp { fsl,pins = < MX8MM_IOMUXC_ENET_MDC_ENET1_MDC 0x3 MX8MM_IOMUXC_ENET_MDIO_ENET1_MDIO 0x3 MX8MM_IOMUXC_ENET_TD3_ENET1_RGMII_TD3 0x1f MX8MM_IOMUXC_ENET_TD2_ENET1_RGMII_TD2 0x1f MX8MM_IOMUXC_ENET_TD1_ENET1_RGMII_TD1 0x1f MX8MM_IOMUXC_ENET_TD0_ENET1_RGMII_TD0 0x1f MX8MM_IOMUXC_ENET_RD3_ENET1_RGMII_RD3 0x91 MX8MM_IOMUXC_ENET_RD2_ENET1_RGMII_RD2 0x91 MX8MM_IOMUXC_ENET_RD1_ENET1_RGMII_RD1 0x91 MX8MM_IOMUXC_ENET_RD0_ENET1_RGMII_RD0 0x91 MX8MM_IOMUXC_ENET_TXC_ENET1_RGMII_TXC 0x1f MX8MM_IOMUXC_ENET_RXC_ENET1_RGMII_RXC 0x91 MX8MM_IOMUXC_ENET_RX_CTL_ENET1_RGMII_RX_CTL 0x91 MX8MM_IOMUXC_ENET_TX_CTL_ENET1_RGMII_TX_CTL 0x1f MX8MM_IOMUXC_SAI2_MCLK_GPIO4_IO27 0x19 / PHY RST / MX8MM_IOMUXC_SAI2_TXC_GPIO4_IO25 0x19 / ETH IRQ */ >; }; pinctrl_gpio_led: gpioledgrp { fsl,pins = < MX8MM_IOMUXC_NAND_READY_B_GPIO3_IO16 0x19 MX8MM_IOMUXC_SAI1_RXD5_GPIO4_IO7 0x19 MX8MM_IOMUXC_SAI1_RXD6_GPIO4_IO8 0x19 MX8MM_IOMUXC_SAI1_RXD7_GPIO4_IO9 0x19 MX8MM_IOMUXC_SAI1_TXD5_GPIO4_IO17 0x19 MX8MM_IOMUXC_SAI1_TXD6_GPIO4_IO18 0x19 MX8MM_IOMUXC_SAI1_TXD7_GPIO4_IO19 0x19 >; }; pinctrl_gpio: gpiogrp { fsl,pins = < MX8MM_IOMUXC_GPIO1_IO03_GPIO1_IO3 0x19 MX8MM_IOMUXC_GPIO1_IO07_GPIO1_IO7 0x19 MX8MM_IOMUXC_GPIO1_IO09_GPIO1_IO9 0x19 MX8MM_IOMUXC_GPIO1_IO11_GPIO1_IO11 0x19 MX8MM_IOMUXC_GPIO1_IO06_GPIO1_IO6 0x19 MX8MM_IOMUXC_GPIO1_IO08_GPIO1_IO8 0x19 MX8MM_IOMUXC_GPIO1_IO10_GPIO1_IO10 0x19 MX8MM_IOMUXC_SAI3_MCLK_GPIO5_IO2 0x19 >; }; pinctrl_i2c3: i2c3grp { fsl,pins = < MX8MM_IOMUXC_I2C3_SCL_I2C3_SCL 0x400001c3 MX8MM_IOMUXC_I2C3_SDA_I2C3_SDA 0x400001c3 >; }; pinctrl_i2c4: i2c4grp { fsl,pins = < MX8MM_IOMUXC_I2C4_SCL_I2C4_SCL 0x400001c3 MX8MM_IOMUXC_I2C4_SDA_I2C4_SDA 0x400001c3 >; }; pinctrl_pwm2: pwm2grp { fsl,pins = < MX8MM_IOMUXC_SPDIF_RX_PWM2_OUT 0x19 >; }; pinctrl_sn65dsi84: sn65dsi84grp { fsl,pins = < MX8MM_IOMUXC_SAI2_TXD0_GPIO4_IO26 0x19 MX8MM_IOMUXC_SD2_WP_GPIO2_IO20 0x19 >; }; pinctrl_uart1: uart1grp { fsl,pins = < MX8MM_IOMUXC_SAI2_RXC_UART1_DCE_RX 0x140 MX8MM_IOMUXC_SAI2_RXFS_UART1_DCE_TX 0x140 MX8MM_IOMUXC_SAI2_RXD0_UART1_DCE_RTS_B 0x140 MX8MM_IOMUXC_SAI2_TXFS_UART1_DCE_CTS_B 0x140 >; }; // pinctrl_uart2: uart2grp { // fsl,pins = < // MX8MM_IOMUXC_SAI3_TXFS_UART2_DCE_RX 0x140 // MX8MM_IOMUXC_SAI3_TXC_UART2_DCE_TX 0x140 // MX8MM_IOMUXC_SAI3_RXD_UART2_DCE_RTS_B 0x140 // MX8MM_IOMUXC_SAI3_RXC_UART2_DCE_CTS_B 0x140 // >; // }; pinctrl_usb_eth2: usbeth2grp { fsl,pins = < MX8MM_IOMUXC_NAND_CE1_B_GPIO3_IO2 0x19 >; }; pinctrl_usdhc2: usdhc2grp { fsl,pins = < MX8MM_IOMUXC_SD2_CLK_USDHC2_CLK 0x190 MX8MM_IOMUXC_SD2_CMD_USDHC2_CMD 0x1d0 MX8MM_IOMUXC_SD2_DATA0_USDHC2_DATA0 0x1d0 MX8MM_IOMUXC_SD2_DATA1_USDHC2_DATA1 0x1d0 MX8MM_IOMUXC_SD2_DATA2_USDHC2_DATA2 0x1d0 MX8MM_IOMUXC_SD2_DATA3_USDHC2_DATA3 0x1d0 MX8MM_IOMUXC_SD2_CD_B_GPIO2_IO12 0x019 >; }; pinctrl_usdhc2_100mhz: usdhc2grp100mhz { fsl,pins = < MX8MM_IOMUXC_SD2_CLK_USDHC2_CLK 0x194 MX8MM_IOMUXC_SD2_CMD_USDHC2_CMD 0x1d4 MX8MM_IOMUXC_SD2_DATA0_USDHC2_DATA0 0x1d4 MX8MM_IOMUXC_SD2_DATA1_USDHC2_DATA1 0x1d4 MX8MM_IOMUXC_SD2_DATA2_USDHC2_DATA2 0x1d4 MX8MM_IOMUXC_SD2_DATA3_USDHC2_DATA3 0x1d4 MX8MM_IOMUXC_SD2_CD_B_GPIO2_IO12 0x019 >; }; pinctrl_usdhc2_200mhz: usdhc2grp200mhz { fsl,pins = < MX8MM_IOMUXC_SD2_CLK_USDHC2_CLK 0x196 MX8MM_IOMUXC_SD2_CMD_USDHC2_CMD 0x1d6 MX8MM_IOMUXC_SD2_DATA0_USDHC2_DATA0 0x1d6 MX8MM_IOMUXC_SD2_DATA1_USDHC2_DATA1 0x1d6 MX8MM_IOMUXC_SD2_DATA2_USDHC2_DATA2 0x1d6 MX8MM_IOMUXC_SD2_DATA3_USDHC2_DATA3 0x1d6 MX8MM_IOMUXC_SD2_CD_B_GPIO2_IO12 0x019 >; }; pinctrl_sai3: sai3grp { fsl,pins = < MX8MM_IOMUXC_SAI3_TXFS_SAI3_TX_SYNC 0xd6 MX8MM_IOMUXC_SAI3_TXD_SAI3_TX_DATA0 0xd6 MX8MM_IOMUXC_SAI3_TXC_SAI3_TX_BCLK 0xd6 MX8MM_IOMUXC_SAI3_MCLK_SAI3_MCLK 0xd6 >; }; }; &sai3 { pinctrl-names = "default"; pinctrl-0 = <&pinctrl_sai3>; assigned-clocks = <&clk IMX8MM_CLK_SAI3>; assigned-clock-parents = <&clk IMX8MM_AUDIO_PLL1_OUT>; assigned-clock-rates = <24576000>; fsl,sai-mclk-direction-output; status = "okay"; }; 该设备树文件是在 BSP 和其他有用资源上查阅此论坛/示例后的结果我还修改了内核配置（使用 bitbake 和 menuconfig），创建了一个片段并附加到 yocto 内核配方 CONFIG_SND_DMAENGINE_PCM=y CONFIG_SND_SOC_GENERIC_DMAENGINE_PCM=y CONFIG_SND_SOC_FSL_ESAI=y CONFIG_SND_SOC=y CONFIG_SND=y ########################### # CONFIG_SND_VERBOSE_PRINTK=y # CONFIG_SND_PCI is not set # CONFIG_SND_SPI is not set # CONFIG_SND_USB is not set CONFIG_SND_SOC_FSL_AUDMIX=y # # SoC Audio support for Freescale i.MX boards: # CONFIG_NETWORK_FILESYSTEMS is not set ### CONFIG_SND_DEBUG=y CONFIG_SND_DEBUG_VERBOSE=y # CONFIG_SND_PCM_XRUN_DEBUG is not set # CONFIG_SND_CTL_VALIDATION is not set CONFIG_SND_SOC_FSL_Asrc=y CONFIG_SND_SOC_FSL_SAI=y # CONFIG_SND_SOC_FSL_MQS is not set CONFIG_SND_SOC_FSL_SSI=y CONFIG_SND_SOC_FSL_EAsrc=y CONFIG_SND_SOC_IMX_PCM_DMA=y CONFIG_SND_SOC_IMX_AUDMUX=y CONFIG_SND_IMX_SOC=y # SoC Audio support for Freescale i.MX boards: # # CONFIG_SND_SOC_IMX_ES8328 is not set # CONFIG_SND_SOC_IMX_SGTL5000 is not set # CONFIG_SND_SOC_IMX_SPDIF is not set CONFIG_SND_SOC_FSL_ASOC_CARD=y # CONFIG_SND_SOC_IMX_AUDMIX is not set CONFIG_SND_SIMPLE_CARD_UTILS=y CONFIG_SND_SIMPLE_CARD=y CONFIG_SND_AUDIO_GRAPH_CARD=y 我知道的事情： - 设备树由 yocto 正确编译并由 linux 内核使用，事实上这是唯一的板载设备树加上如果我在 /proc 下捕获设备树模型这就是结果 root@70820e12a37e:~# cat /proc/device-tree/model Custom Kontron i.MX8MM board - 在 /proc/device-tree 下我可以看到我的设备 root@70820e12a37e:/proc/device-tree# ls -alh total 0 -r--r--r-- 1 root root 4 Jan 4 15:36 #address-cells -r--r--r-- 1 root root 4 Jan 4 15:36 #size-cells drwxr-xr-x 27 root root 0 Jan 1 1970 . drwxr-xr-x 3 root root 0 Jan 1 1970 .. drwxr-xr-x 2 root root 0 Jan 4 15:36 aliases drwxr-xr-x 2 root root 0 Jan 4 15:36 chosen drwxr-xr-x 2 root root 0 Jan 4 15:36 clock-ext1 drwxr-xr-x 2 root root 0 Jan 4 15:36 clock-ext2 drwxr-xr-x 2 root root 0 Jan 4 15:36 clock-ext3 drwxr-xr-x 2 root root 0 Jan 4 15:36 clock-ext4 drwxr-xr-x 2 root root 0 Jan 4 15:36 clock-osc-24m drwxr-xr-x 2 root root 0 Jan 4 15:36 clock-osc-32k drwxr-xr-x 2 root root 0 Jan 4 15:36 clock-osc-can drwxr-xr-x 2 root root 0 Jan 4 15:36 codec_dummy -r--r--r-- 1 root root 81 Jan 4 15:36 compatible drwxr-xr-x 8 root root 0 Jan 4 15:36 cpus -r--r--r-- 1 root root 4 Jan 4 15:36 interrupt-parent drwxr-xr-x 8 root root 0 Jan 4 15:36 leds drwxr-xr-x 2 root root 0 Jan 4 15:36 memory@40000000 drwxr-xr-x 2 root root 0 Jan 4 15:36 mipi-video-phy -r--r--r-- 1 root root 37 Jan 4 15:34 model -r--r--r-- 1 root root 1 Jan 4 15:36 name drwxr-xr-x 5 root root 0 Jan 4 15:36 opp-table drwxr-xr-x 2 root root 0 Jan 4 15:36 pmu drwxr-xr-x 2 root root 0 Jan 4 15:36 psci drwxr-xr-x 2 root root 0 Jan 4 15:36 regulator-5v drwxr-xr-x 2 root root 0 Jan 4 15:36 regulator-rst-eth2 drwxr-xr-x 14 root root 0 Jan 4 15:36 soc@0 drwxr-xr-x 4 root root 0 Jan 4 15:36 sound-sai3sound drwxr-xr-x 3 root root 0 Jan 4 15:36 thermal-zones drwxr-xr-x 2 root root 0 Jan 4 15:36 timer drwxr-xr-x 2 root root 0 Jan 4 15:36 usbphynop1 drwxr-xr-x 2 root root 0 Jan 4 15:36 usbphynop2 ALSA 设备仍然丢失 root@70820e12a37e:/proc/device-tree# aplay -l aplay: device_list:272: no soundcards found... 此外，内核日志不显示错误，我尝试启用 ALSA 日志调试级别，但在启动期间没有显示任何内容（没有错误，没有声卡，没有警告......只有“找不到声卡......”） . 我真的很难做到这一点，至少在经过大量的试验/错误之后我已经正确地编译了设备树所以我开始思考......我错过了什么吗？是否还有其他一些我需要做的事情，我需要在内核中启用其他一些选项，或者 alsa 设置...感谢每个提示 0
2023-3-17 07:28:55　　评论淘帖0 邀请回答您可以邀请以下用户，快速回答问题 × chm5 该类别下有 36 个回答。邀请回答 wang21cj 该类别下有 33 个回答。邀请回答新星之火12138 该类别下有 29 个回答。邀请回答 hgimtk 该类别下有 24 个回答。邀请回答 heks 该类别下有 22 个回答。邀请回答 gdfffa 该类别下有 22 个回答。邀请回答 fdhsfagd 该类别下有 21 个回答。邀请回答 xiaolu511 该类别下有 21 个回答。邀请回答 lifei639156 该类别下有 21 个回答。邀请回答秦小姐9048 该类别下有 21 个回答。邀请回答艾玛该类别下有 20 个回答。邀请回答 JasonXiong 该类别下有 20 个回答。邀请回答英雄孤寂该类别下有 20 个回答。邀请回答一刀两断该类别下有 19 个回答。邀请回答 dahairenlyy 该类别下有 19 个回答。邀请回答 fhbding 该类别下有 19 个回答。邀请回答 kevinvind 该类别下有 19 个回答。邀请回答 HCPcry 该类别下有 19 个回答。邀请回答自我清欢该类别下有 19 个回答。邀请回答 testd27 该类别下有 19 个回答。邀请回答举报杨帆相关推荐 • imx8mm的DTS文件在哪里？ 1495 • imx8mm vpu libimxdmabuffer编译错误的原因？如何解决？ 471 • iMX8MM EVK的U-Boot是否支持SPI接口？ 359 • 请问imx8mm怎么使用GPU呢？ 1539 • 如何将mipi相机与imx8mm接口连接？ 414 • imx8mm是如何利用uuu去烧写android的 2261 • 请问imx8mm音频怎么配置TDM模式呢 1030 • 如何在iMX8MM EVK中启用TPM支持？ 856 • 请问imx8mm如何单独烧写内核？ 1221 • imx8mm android烧写/usr/bin/目录在哪个位置？ 602