[SOLVED] audio i2s with OpenElec

Giachi

Hello,
thank you very much for this project.
It0s running very well, but i'd like use a external dac board connected with I2S interface.
With other people we spoke about it and now  we know i2s dacs can work with Orange PI PC: link
I tested my dac with a customed debian version made frome users Jirm in Diyaduio forum , end the dac run well. So with armbian  i read the i2s dacs run ok.
I tested with OpenElec 7 (image made in May) but it not run.
I connected to the board with putty, and i try the comand cat /proc/asound/cards   but the system show me sndhdmi  , not snddaudio .
I see with openElec the comands apt-get not run (i wanted install the kernel source for add the module snddaudio).  Can you help me, or tell how i can modify OpenElec?


Thanks
bye

jernej

can someone, who uses i2s, post output of following commands:

1. dmesg
   
2. aplay -l
   
3. aplay -L

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Giachi

thanks.
For be sure i delated all OpenELEC-OPi2 folder, then:

1) Download the project with

1. git clone -b openelec-7.0 --depth 1 https://github.com/jernejsk/OpenELEC-OPi2

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2)  went inside the new folder:

1. cd OpenELEC-OPi2

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3) run

1. git pull

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it replied

1. Already up-to-date

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4) changed the file OpenELEC-OPi2/projects/H3/sys_config/opipc.fex

1. [hdmi_cec]
   
2. hdmi_cec_used = 0

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1. [pcm0]
   
2. daudio_used = 1

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1. [w1_para]
   
2. w1_used = 0

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5) changed in OpenELEC-OPi2/projects/H3/linux/linux.arm.conf

1. CONFIG_SND_SUNXI_SOC_DAUDIO0_INTERFACE=y
   
2. CONFIG_SND_SUNXI_SOC_DAUDIO0_PUBLIC_MACHINE=y

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6) comiple with

1. PROJECT=H3 SYSTEM=opipc ARCH=arm make image

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now i am waiting because is necessary a lot of time for the download  of the need software for compile;
tomorow i will try the new image.
For now thanks

jernej

At this point, I'm really not sure, if daudio driver is compiled as module or it is build in. Did you try modprobing it? Another thing is that you have to change fex file for this, if I'm not mistaken.

OpenELEC is special in that way, that you can't change any files in filesystem, except in home folder. If you want to change anything, you have to change build script and build image on your own. Where to get it, it's described in FAQ topic.

Giachi

tanks, i am looking FAQ topic. I will try to build a image

Giachi

Hi Jernej,
i tried to rebuild OpenElec (downloaded from

1. git clone -b openelec-7.0 --depth 1 https://github.com/jernejsk/OpenELEC-OPi2

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) changing the file OpenELEC-OPi2/projects/H3/sys_config/opipc.fex:

....
[pcm0]
daudio_used = 1   (before was zero)

[w1_para]
w1_used = 0   (because pin PI20 is used from i2s)

[twi1]
twi_used = 0  (because PI18 and PI19 are used from i2s)

the sistem start well, but audio i2s (should be snddaudio) is not enable:


when i access to sistem with ssh and i use

1. aplay -l

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it show me

card0: audiocodec
card1: sndhmi

(i tried disable audiohub to
[audiohub]
hub_used = 0
but nothing is changed)

I read whit armbian opi pc i2s run ok;
so with This (post 37) i tried is ok.

with i2s ok the system should show
card1 [snddaudio ]: snddaudio - snddaudio
snddaudio

have you some idea what i'd can try?

jernej

Giachi replied at 2016-6-1 12:48
Hi Jernej,
i tried to rebuild OpenElec (downloaded from  ) changing the file OpenELEC-OPi2/projects/ ...

Changes seems ok, you don't have to disable audio hub, but if you want to be sure, then it's ok.

Main difference between Armbian and OpenELEC regarding this driver (daudio) is that Armbian has it built-in and OpenELEC has it as a module. You have to modprobe it. I don't know exact module name. You can search for it in /lib/modules and then load it using "modprobe <driver-name>". It may be that you have to load (modprobe) two drivers. Currently I can't check exact module names.

Giachi

thanks.
The module is snddaudio0
i loaded it with

1. modprobe snddaudio0

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but after when i  try

1. dmesg

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it show

1. [I2S]snddaudio cannot find any using configuration for controllers, return directly!

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jernej

hm... are you sure that your fex changes are taken into account? After every fex change, you have to clear kernel first with

1. PROJECT=H3 ARCH=arm scripts/clean linux

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and then rebuild image.

or you can take easy way and just use fex2bin and bin2fex directly on fex file or, if you are using latest sources, script.bin.

BTW: it's more than one daudio file. Be sure at all of following are loaded:

1. sndaudio0
   
2. sunxi-daudiodma0
   
3. sunxi-snddaudio0
   
4. sunxi-daudio0

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loaded modules can be checked with "lsmod" and correct script.bin settings with for example "read_fex pcm0 daudio_used"

Giachi

jernej replied at 2016-6-2 02:49
hm... are you sure that your fex changes are taken into account? After every fex change, you have to ...

maybe the error was I used the comand

1. PROJECT=H3 SYSTEM=opipc ARCH=arm ./scripts/clean linux

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and no

1. PROJECT=H3  ARCH=arm ./scripts/clean linux
   

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Giachi

now i retry, thanks

Giachi

jernej replied at 2016-6-2 02:49
hm... are you sure that your fex changes are taken into account? After every fex change, you have to ...