Hi Nick,
I followed yours links and created new sound card and driver imx-itel. Now the new sound card is installed and listed by ALSA but without any kind of volume control, any suggestions? Anyway, now I'm going to check if outputs send I2S data. Riccardo ----- Messaggio Originale ----- Da: "nick83ola" <nick83...@gmail.com> A: riccardo.casagra...@multiconn.it Cc: yocto@yoctoproject.org Data: 17/07/2018 11:24 Oggetto: Re: [Spam - Sospetto] Re: [yocto] IMX6Q add new sound simple sound card Hi, the chip has his internal "codec" you can see from the datasheet that has an i2s for the audio and an i2c interface for configuration. the codec that you select ak4648 needs an initialization phase that is done usually via i2c. If the driver can't find the codec it will simply disable itself (and you don't see the alsa audio card) First try to make the dummy codec work. If its working you should be able to see that alsa recognize the dummy soundcard and to be able to play something and see the i2s signal on the board with an oscilloscope/logic analyzer After that you probably need to develop a codec driver for that particular chip. Probably the alsa mailing list is the right place to get help regarding this. You can have a look at my previous post on those topics (I was in the same boat as you :-) ) https://community.nxp.com/thread/391216 http://mailman.alsa-project.org/pipermail/alsa-devel/2016-May/108068.html Cheers Nick On Mon, 16 Jul 2018 at 10:38, Riccardo Casagrande < riccardo.casagra...@multiconn.it > wrote: Hello Nick the i.MX6Q is not connected to a codec but directly to 3 FDA2100 from STMicroelectronics, these chips are digital power amplifiers. On input I have 2 input from ADCs. I wrote several sound nodes but at moment the best result is no error at boot, the sound card listed under /proc/device-tree but not in alsa. This is the device-tree sub node sound-fda2100 { compatible = "simple-audio-card"; simple-audio-card,name = "MTC-FDA2100-Card"; simple-audio-card,format = "i2s"; simple-audio-card,widgets = "Microphone", "Microphone Jack", "Headphone", "Headphone Jack", "Speaker", "External Speaker"; simple-audio-card,routing = "MIC_IN", "Microphone Jack", "Headphone Jack", "HP_OUT", "External Speaker", "LINE_OUT"; simple-audio-card,bitclock-master = <&cpu_dai>; simple-audio-card,frame-master = <&cpu_dai>; cpu_dai: simple-audio-card,cpu { sound-dai = <&ssi1 0>; }; codec_dai: simple-audio-card,codec { sound-dai = <&codec_test>; }; }; codec_test: codec_test { compatible = "linux,snd-soc-dummy"; #sound-dai-cells = <0>; }; And last week I found that "dummy codec is not supported in NXP linux release" as reported here https://community.nxp.com/thread/466938 ----- Messaggio Originale ----- Da: "nick83ola" < nick83...@gmail.com > A: riccardo.casagra...@multiconn.it Cc: yocto@yoctoproject.org Data: 16/07/2018 10:37 Oggetto: [Spam - Sospetto] Re: [yocto] IMX6Q add new sound simple sound card Hi, how is your sound card connected? If you look at the devicetree for a sound card to work you have to configure - system clock - device that handle the communication with the sound card (f ex i2s, or i2c or usb, or whatever) (sound-dai) - the soundcard itself (codec?) So you need more information regarding your hardware, the codec, how is connected, etc etc Look at the source of the simple audio card driver and maybe at some other driver in the kernel source Cheers Nick ----------------------------------------------------------------------------------------------------- sound { simple-audio-card,cpu { sound-dai = <& sh_fsi2 0>; }; dailink0_master: simple-audio-card, codec { sound-dai = <& ak4648>; clocks = <& osc>; }; }; &i2c0 { ak4648: ak4648@12 { #sound-dai-cells = <0>; compatible = "asahi-kasei,ak4648"; reg = <0x12>; }; }; sh_fsi2: sh_fsi2@ec230000 { #sound-dai-cells = <1>; compatible = "renesas,sh_fsi2"; reg = <0xec230000 0x400>; interrupt-parent = <&gic>; interrupts = <0 146 0x4>; }; On Thu, 5 Jul 2018 at 16:13, Riccardo Casagrande < riccardo.casagra...@multiconn.it > wrote: Hello all, I'm new to Linux/Yocto world. I'm working on iMX6Q and I need to add a new sound card and recognized from alsamixer. I spent days on internet looking for examples and tutorials but at the moment alsa never see my sound card. This is one of the tutorials I followed https://elixir.bootlin.com/linux/v4.5/source/Documentation/devicetree/bindings/sound/simple-card.txt What I've done? - Activated support for generic sound board on menuconfig - Added new "sound" node in device tree file with minimal properties/subnotes - Compiled the kernel - Compiled and flashed the image but alsamixer still doesn't recognize my sound card, what am I missing? Thanks. -- _______________________________________________ yocto mailing list yocto@yoctoproject.org https://lists.yoctoproject.org/listinfo/yocto
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