On Sun, Jan 22, 2017 at 1:38 PM, jo <crazyiop@xxxxxxxxx> wrote:
Hi everyone,
I am currently trying to get a simple audio I2S DAC board (https://polyvection.com/shop/plaindac/ ) to work on a beaglebone green wireless. The components is a PCM5121, a popular one that has an existing driver.
so far,
- I have a custom compiled kernel with the apropriate driver compiled
$ grep PCM512 .config
CONFIG_SND_SOC_PCM512x=m
CONFIG_SND_SOC_PCM512x_I2C=m
- I can boot with a custom device tree including my definition of the board as an "asoc-simple-card" and it get recognise without error on boot.
root@beaglebone:~# dmesg |grep sound
[ 28.730678] asoc-simple-card sound: pcm512x-hifi <-> 48038000.mcasp mapping ok
root@beaglebone:~# lsmod |grep pcm512
snd_soc_pcm512x_i2c 2782 1
snd_soc_pcm512x 24341 1 snd_soc_pcm512x_i2c
snd_soc_core 192029 5 snd_soc_pcm512x,snd_soc_davinci_mcasp,snd_soc_edma,snd_soc_ omap,snd_soc_simple_card
snd_pcm 103172 6 snd_soc_pcm512x,snd_soc_davinci_mcasp,snd_soc_core,snd_soc_ omap,snd_pcm_dmaengine
- I can open the device with alsamixer, and can confirm the sound is on 100%
Howewer, I still can't get any sound of the device.
Does someone has experience in regards to asoc audio device and cant give me some thought on easy to miss things ?
I am still trying to figure out if I have omitted something on the device tree, or if I need to configure something more on the OS (alsa, pulseaudio ?)...
I have attached my device tree, if someone feel like giving a look at it. (my addition from the original one comes after line 73).
Also some output that may give you more info that they are giving to me:
root@beaglebone:~# aplay -v Pom\ Pom.wav
Playing WAVE 'Pom Pom.wav' : Signed 32 bit Little Endian, Rate 44100 Hz, Stereo
ALSA <-> PulseAudio PCM I/O Plugin
Its setup is:
stream : PLAYBACK
access : RW_INTERLEAVED
format : S32_LE
subformat : STD
channels : 2
rate : 44100
exact rate : 44100 (44100/1)
msbits : 32
buffer_size : 22050
period_size : 5512
period_time : 125000
tstamp_mode : NONE
period_step : 1
avail_min : 5512
period_event : 0
start_threshold : 22050
stop_threshold : 22050
silence_threshold: 0
silence_size : 0
boundary : 1445068800
#nothing play and the above stay displayed -as is- until I ctrl-c
Possible that you have not turned on the mixer controls i.e.
enabling the volume?
Check sw_ptr and hw_ptr and see if those are increasing or not?
Probe the I2S lines and see if there is any data?
root@beaglebone:~# aplay -l
**** List of PLAYBACK Hardware Devices ****
card 0: plaindac [plaindac], device 0: davinci-mcasp.0-pcm512x-hifi pcm512x-hifi-0 []
Subdevices: 0/1
Subdevice #0: subdevice #0
root@beaglebone:~# cat /proc/asound/card0/pcm0p/info
card: 0
device: 0
subdevice: 0
stream: PLAYBACK
id: davinci-mcasp.0-pcm512x-hifi pcm512x-hifi-0on
name:
subname: subdevice #0
class: 0
subclass: 0
subdevices_count: 1
subdevices_avail: 0
Regards,
Jonathan.
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