custom audio card on beaglebone
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 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.
On Sun, Jan 22, 2017 at 1:38 PM, jo <crazyiop@gmail.com> 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_davinc i_mcasp,snd_soc_edma,snd_soc_omap,snd_soc_simple_card snd_pcm 103172 6 snd_soc_pcm512x,snd_soc_davinc i_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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Hi Anish, thanks for giving me some thougt. Here is what I found: On Sun, Jan 22, 2017 at 03:47:54PM -0800, anish singh wrote:
On Sun, Jan 22, 2017 at 1:38 PM, jo <crazyiop@gmail.com> wrote:
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?
So first, the above command in fact do finish after the length of the file (I thought I took a much smaller test sample..) The mixer control were all on and volume to the max. I don't have a scope, but you made me realize that I'm clueless in front of my problem without one... So I finnaly found an access to one. The measure show that the input clock of the pll (mclk) is just non-existant. I now know what to look for. I tried to find a reference to those sw_ptr and hw_ptr somewhere, without success, what are they and where can I find/probe them ? Thanks!! Jonathan.
On Wed, Jan 25, 2017 at 2:30 AM, <crazyiop@gmail.com> wrote:
Hi Anish,
thanks for giving me some thougt. Here is what I found:
On Sun, Jan 22, 2017 at 03:47:54PM -0800, anish singh wrote:
On Sun, Jan 22, 2017 at 1:38 PM, jo <crazyiop@gmail.com> wrote:
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?
So first, the above command in fact do finish after the length of the file (I thought I took a much smaller test sample..)
The mixer control were all on and volume to the max. I don't have a scope, but you made me realize that I'm clueless in front of my problem without one... So I finnaly found an access to one. The measure show that the input clock of the pll (mclk) is just non-existant. I now know what to look for.
I tried to find a reference to those sw_ptr and hw_ptr somewhere, without success, what are they and where can I find/probe them ?
# cat /proc/asound/card0/pcm0p/sub0/status state: RUNNING owner_pid : 1440 trigger_time: 16024.849105290 tstamp : 16175.605386326 delay : 768 avail : 1280 avail_max : 2048 ----- hw_ptr : 7236608 appl_ptr : 7237376
Thanks!! Jonathan.
participants (3)
-
anish singh -
crazyiop＠gmail.com -
jo