Hi Thierry,
Thanks for your reply. And the "malloc" issue I reply in the latest "afm-mediaplayer-binding" title mail but i only send the mail to Romain Forlot, i forgot add automotive-discussions, sorry. And here is my details:
1.
I follow the link that you give me: https://jira.automotivelinux.org/browse/SPEC-1639
I download the new SDK version, here is the link:
https://download.automotivelinux.org/AGL/snapshots/master/2018-08-15-b870/raspberrypi3/deploy/sdk/poky-agl-glibc-x86_64-agl-demo-platform-crosssdk-armv7vehf-neon-vfpv4-toolchain-5.99.2+snapshot.sh
The solution said that should update smixer's submodule on master, i did it but still failed.
2.
And next, I update the 4a-hal-generic's submodule on master, still failed.
3.
At last, I update all the modules' submodules but 4a-hal-unicens', because after i update its submodules, compiled fail:
```
$ cd 4a-alsa-core
$ git submodule foreach git pull origin master
$ cd ../4a-hal-generic
$ git submodule foreach git pull origin master
$ cd ../4a-softmixer
$ git submodule foreach git pull origin master
$ cd ../agl-service-audio-4a
$ git submodule foreach git pull origin master ```
When I update them, it works but i don't know why...I think i should understand 4a code deeply.
May be i guess it have some relationship with code version...
And i can give the "git diff" information to you, hope those could help you.
Cheers,
Sitech
------------------ Original ------------------
Date: Fri, Aug 17, 2018 05:22 PM
To: "automotive-discussions"<automotive-discussions@xxxxxxxxxxxxxxxxxxxxxxxxx>;
Subject: Re: [agl-discussions] 4a-smixer ERROR & configration file
Dear Sitech,
May I assume that if you reached that step, it is that you solved or
worked around the "malloc" issue you had ? If yes, would you mind
sharing with us how you did ?
Now, about your new question:
The softmixer is failing while trying to open the read side of the
snd-aloop device. With the little information we have here in your log,
it is pretty hard to say why.
This is what you should have:
INFO: [API smixer] CreateOneStream, stream 2ch-generic-usb multimedia,
source (null), sink full-stereo, mute 0
INFO: [API smixer] CreateOneStream: found loopdev 1,2
But you get this:
INFO: [API smixer] CreateOneStream: 2ch-generic-usb not found in loop,
look in sources
This is really unexpected. With a null source given as an argument, the
subdev "2" should automatically be opened. For information, "look in
source" is a special fallback for the softmixer to directly read from
hardware capture devices (microphones, radio ...), and this it not what
you want here.
I suggest you have a look at the ApiLoopFindSubdev function (in
alsa-api-loop.c) and try to understand how come it returns NULL.
Regards,
Thierry
On 08/17/2018 10:30 AM, Sitech wrote:
> Hi,
> When I wanna to use 4a to manager an external sound card and play some
> music, but i got some errors, i think must be some problem in my
> configuration files. So i hope friends to give me some advices, here is
> my log and attachment is my configuration file.
>
> ```log
> Aug 8 08:28:30 raspberrypi3 daemon.info
> afbd-agl-service-audio-4a@1.0-11d2ae9[538]: INFO: [API smixer]
> MixerAttachVerb set RAMPS
> [/usr/src/debug/4a-softmixer/0.1+gitAUTOINC+ded8e37b50-r0/git/plugins/alsa/alsa-api-mixer.c:608,MixerAttachVerb]
> Aug 8 08:28:30 raspberrypi3 daemon.info
> afbd-agl-service-audio-4a@1.0-11d2ae9[538]: INFO: [API smixer]
> MixerAttachVerb set STREAMS
> [/usr/src/debug/4a-softmixer/0.1+gitAUTOINC+ded8e37b50-r0/git/plugins/alsa/alsa-api-mixer.c:618,MixerAttachVerb]
> Aug 8 08:28:30 raspberrypi3 daemon.info
> afbd-agl-service-audio-4a@1.0-11d2ae9[538]: INFO: [API smixer]
> ApiStreamAttach: 2ch-generic-usb prefix 2ch-usb
> [/usr/src/debug/4a-softmixer/0.1+gitAUTOINC+ded8e37b50-r0/git/plugins/alsa/alsa-api-streams.c:508,ApiStreamAttach]
> Aug 8 08:28:30 raspberrypi3 daemon.notice
> afbd-agl-service-audio-4a@1.0-11d2ae9[538]: NOTICE: [API smixer]
> ApiPcmSetParams:multimedia format set to SND_PCM_FORMAT_S16_LE
> [/usr/src/debug/4a-softmixer/0.1+gitAUTOINC+ded8e37b50-r0/git/plugins/alsa/alsa-api-pcm.c:401,ApiPcmSetPar
> Aug 8 08:28:30 raspberrypi3 daemon.notice
> afbd-agl-service-audio-4a@1.0-11d2ae9[538]: NOTICE: [API smixer]
> ApiPcmSetParams:multimedia access set to (null)
> [/usr/src/debug/4a-softmixer/0.1+gitAUTOINC+ded8e37b50-r0/git/plugins/alsa/alsa-api-pcm.c:420,ApiPcmSetParams]
> Aug 8 08:28:30 raspberrypi3 daemon.info
> afbd-agl-service-audio-4a@1.0-11d2ae9[538]: INFO: [API smixer]
> CreateOneStream, stream 2ch-generic-usb multimedia, source (null), sink
> full-stereo, mute 0
> [/usr/src/debug/4a-softmixer/0.1+gitAUTOINC+ded8e37b50-r0/git/plugins/alsa/alsa
> Aug 8 08:28:30 raspberrypi3 daemon.info
> afbd-agl-service-audio-4a@1.0-11d2ae9[538]: INFO: [API smixer]
> CreateOneStream: 2ch-generic-usb not found in loop, look in sources
> [/usr/src/debug/4a-softmixer/0.1+gitAUTOINC+ded8e37b50-r0/git/plugins/alsa/alsa-api-streams.c:218,Creat
> Aug 8 08:28:30 raspberrypi3 daemon.err
> afbd-agl-service-audio-4a@1.0-11d2ae9[538]: ERROR: [API smixer]
> CreateOneStream: mixer=Alsa-Mixer stream=multimedia not found in
> loops/sources
> [/usr/src/debug/4a-softmixer/0.1+gitAUTOINC+ded8e37b50-r0/git/plugins/alsa/alsa-api-streams
> Aug 8 08:28:30 raspberrypi3 daemon.err
> afbd-agl-service-audio-4a@1.0-11d2ae9[538]: ERROR: [API smixer]
> AttachOneStream: failed to create stream
> [/usr/src/debug/4a-softmixer/0.1+gitAUTOINC+ded8e37b50-r0/git/plugins/alsa/alsa-api-streams.c:494,AttachOneStream]
> Aug 8 08:28:30 raspberrypi3 daemon.err
> afbd-agl-service-audio-4a@1.0-11d2ae9[538]: ERROR: [API smixer]
> AttachOneStream fail
> [/usr/src/debug/4a-softmixer/0.1+gitAUTOINC+ded8e37b50-r0/git/plugins/alsa/alsa-api-streams.c:502,AttachOneStream]
> Aug 8 08:28:30 raspberrypi3 daemon.warn
> afbd-agl-service-audio-4a@1.0-11d2ae9[538]: WARNING: [API
> 4a-hal-2ch-generic-usb] Api smixer and verb attach found, but this error
> was raised : 'invalid-syntax' with this info : 'ApiStreamAttach:
> mixer=Alsa-Mixer invalid stream= { "ui
> Aug 8 08:28:30 raspberrypi3 daemon.err
> afbd-agl-service-audio-4a@1.0-11d2ae9[538]: ERROR: [API
> 4a-hal-2ch-generic-usb] Error -10 during call to verb attach of smixer
> api with status 'invalid-syntax' and info 'ApiStreamAttach:
> mixer=Alsa-Mixer invalid stream= { "uid": "mult
> Aug 8 08:28:30 raspberrypi3 daemon.err
> afbd-agl-service-audio-4a@1.0-11d2ae9[538]: ERROR: [API
> 4a-hal-2ch-generic-usb] HalCtlsInitOneApi: Error -7 while attaching to
> mixer
> [/home/albert/files/agl/code/audio-4a-backup/4a-hal-generic/4a-hal/4a-hal-controllers/4a-hal-controll
> Aug 8 08:28:30 raspberrypi3 daemon.err
> afbd-agl-service-audio-4a@1.0-11d2ae9[538]: ERROR: Initialisation of
> service API 4a-hal-2ch-generic-usb failed (-4): Success
> [/home/albert/files/agl/code/app-framework-binder-2/src/afb-export.c:1702,afb_export_start]
> Aug 8 08:28:30 raspberrypi3 daemon.err
> afbd-agl-service-audio-4a@1.0-11d2ae9[538]: ERROR: The api
> 4a-hal-2ch-generic-usb failed to start
> [/home/albert/files/agl/code/app-framework-binder-2/src/afb-apiset.c:799,start_api]
> ```
>
> raspberrypi3:~# aplay -l
> **** List of PLAYBACK Hardware Devices ****
> card 0: Loopback [Loopback], device 0: Loopback PCM [Loopback PCM]
> Subdevices: 8/8
> Subdevice #0: subdevice #0
> Subdevice #1: subdevice #1
> Subdevice #2: subdevice #2
> Subdevice #3: subdevice #3
> Subdevice #4: subdevice #4
> Subdevice #5: subdevice #5
> Subdevice #6: subdevice #6
> Subdevice #7: subdevice #7
> card 0: Loopback [Loopback], device 1: Loopback PCM [Loopback PCM]
> Subdevices: 8/8
> Subdevice #0: subdevice #0
> Subdevice #1: subdevice #1
> Subdevice #2: subdevice #2
> Subdevice #3: subdevice #3
> Subdevice #4: subdevice #4
> Subdevice #5: subdevice #5
> Subdevice #6: subdevice #6
> Subdevice #7: subdevice #7
> card 1: Device [USB Audio Device], device 0: USB Audio [USB Audio]
> Subdevices: 1/1
> Subdevice #0: subdevice #0
> card 2: ALSA [bcm2835 ALSA], device 0: bcm2835 ALSA [bcm2835 ALSA]
> Subdevices: 8/8
> Subdevice #0: subdevice #0
> Subdevice #1: subdevice #1
> Subdevice #2: subdevice #2
> Subdevice #3: subdevice #3
> Subdevice #4: subdevice #4
> Subdevice #5: subdevice #5
> Subdevice #6: subdevice #6
> Subdevice #7: subdevice #7
> card 2: ALSA [bcm2835 ALSA], device 1: bcm2835 ALSA [bcm2835 IEC958/HDMI]
> Subdevices: 1/1
> Subdevice #0: subdevice #0
> card 3: vc4hdmi [vc4-hdmi], device 0: MAI PCM vc4-hdmi-hifi-0 []
> Subdevices: 1/1
> Subdevice #0: subdevice #0
>
> raspberrypi3:/dev/snd# ls ./* -al
> crw-rw---- 1 root audio 116, 0 Aug 8 08:28 ./controlC0
> crw-rw---- 1 root audio 116, 32 Aug 8 08:28 ./controlC1
> crw-rw---- 1 root audio 116, 64 Aug 8 08:28 ./controlC2
> crw-rw---- 1 root audio 116, 96 Aug 8 08:28 ./controlC3
> crw-rw---- 1 root audio 116, 24 Aug 8 08:28 ./pcmC0D0c
> crw-rw---- 1 root audio 116, 16 Aug 8 08:28 ./pcmC0D0p
> crw-rw---- 1 root audio 116, 25 Aug 8 08:28 ./pcmC0D1c
> crw-rw---- 1 root audio 116, 17 Aug 8 08:28 ./pcmC0D1p
> crw-rw---- 1 root audio 116, 56 Aug 8 08:28 ./pcmC1D0c
> crw-rw---- 1 root audio 116, 48 Aug 8 08:28 ./pcmC1D0p
> crw-rw---- 1 root audio 116, 80 Aug 8 08:28 ./pcmC2D0p
> crw-rw---- 1 root audio 116, 81 Aug 8 08:28 ./pcmC2D1p
> crw-rw---- 1 root audio 116, 112 Aug 8 08:28 ./pcmC3D0p
> crw-rw----. 1 root audio 116, 1 Aug 8 08:28 ./seq
> crw-rw---- 1 root audio 116, 33 Aug 8 08:28 ./timer
>
> ./by-id:
> total 0
> drwxr-xr-x. 2 root root 60 Aug 8 08:28 .
> drwxr-xr-x. 4 root root 380 Aug 8 08:28 ..
> lrwxrwxrwx 1 root root 12 Aug 8 08:28
> usb-C-Media_Electronics_Inc._USB_Audio_Device-00 -> ../controlC1
>
> ./by-path:
> total 0
> drwxr-xr-x. 2 root root 120 Aug 8 08:28 .
> drwxr-xr-x. 4 root root 380 Aug 8 08:28 ..
> lrwxrwxrwx. 1 root root 12 Aug 8 08:28 platform-3f902000.hdmi ->
> ../controlC3
> lrwxrwxrwx 1 root root 12 Aug 8 08:28
> platform-3f980000.usb-usb-0:1.3:1.0 -> ../controlC1
> lrwxrwxrwx. 1 root root 12 Aug 8 08:28 platform-snd_aloop.0 ->
> ../controlC0
> lrwxrwxrwx 1 root root 12 Aug 8 08:28 platform-soc:audio -> ../controlC2
>
>
> raspberrypi3:/dev/snd# ls /proc/asound/ -al
> total 0
> dr-xr-xr-x 8 root root 0 Aug 8 08:54 .
> dr-xr-xr-x 185 root root 0 Jan 1 1970 ..
> lrwxrwxrwx 1 root root 5 Aug 8 08:54 ALSA -> card2
> lrwxrwxrwx 1 root root 5 Aug 8 08:54 Device -> card1
> lrwxrwxrwx 1 root root 5 Aug 8 08:54 Loopback -> card0
> dr-xr-xr-x 6 root root 0 Aug 8 08:54 card0
> dr-xr-xr-x 4 root root 0 Aug 8 08:54 card1
> dr-xr-xr-x 4 root root 0 Aug 8 08:54 card2
> dr-xr-xr-x 3 root root 0 Aug 8 08:54 card3
> -r--r--r-- 1 root root 0 Aug 8 08:54 cards
> -r--r--r-- 1 root root 0 Aug 8 08:54 devices
> -r--r--r-- 1 root root 0 Aug 8 08:54 hwdep
> dr-xr-xr-x 2 root root 0 Aug 8 08:54 oss
> -r--r--r-- 1 root root 0 Aug 8 08:54 pcm
> dr-xr-xr-x 2 root root 0 Aug 8 08:54 seq
> -r--r--r-- 1 root root 0 Aug 8 08:54 timers
> lrwxrwxrwx 1 root root 5 Aug 8 08:54 vc4hdmi -> card3
> -r--r--r-- 1 root root 0 Aug 8 08:54 version
> raspberrypi3:/dev/snd# cat /proc/asound/devices
> 0: [ 0] : control
> 16: [ 0- 0]: digital audio playback
> 17: [ 0- 1]: digital audio playback
> 24: [ 0- 0]: digital audio capture
> 25: [ 0- 1]: digital audio capture
> 32: [ 1] : control
> 33: : timer
> 48: [ 1- 0]: digital audio playback
> 56: [ 1- 0]: digital audio capture
> 64: [ 2] : control
> 80: [ 2- 0]: digital audio playback
> 81: [ 2- 1]: digital audio playback
> 96: [ 3] : control
> 112: [ 3- 0]: digital audio playback
>
>
> Thanks,
> Sitech
>
>
> _______________________________________________
> automotive-discussions mailing list
> automotive-discussions@xxxxxxxxxxxxxxxxxxxxxxxxx
> https://lists.linuxfoundation.org/mailman/listinfo/automotive-discussions
>
_______________________________________________
automotive-discussions mailing list
automotive-discussions@xxxxxxxxxxxxxxxxxxxxxxxxx
https://lists.linuxfoundation.org/mailman/listinfo/automotive-discussions
May I assume that if you reached that step, it is that you solved or
worked around the "malloc" issue you had ? If yes, would you mind
sharing with us how you did ?
Now, about your new question:
The softmixer is failing while trying to open the read side of the
snd-aloop device. With the little information we have here in your log,
it is pretty hard to say why.
This is what you should have:
INFO: [API smixer] CreateOneStream, stream 2ch-generic-usb multimedia,
source (null), sink full-stereo, mute 0
INFO: [API smixer] CreateOneStream: found loopdev 1,2
But you get this:
INFO: [API smixer] CreateOneStream: 2ch-generic-usb not found in loop,
look in sources
This is really unexpected. With a null source given as an argument, the
subdev "2" should automatically be opened. For information, "look in
source" is a special fallback for the softmixer to directly read from
hardware capture devices (microphones, radio ...), and this it not what
you want here.
I suggest you have a look at the ApiLoopFindSubdev function (in
alsa-api-loop.c) and try to understand how come it returns NULL.
Regards,
Thierry
On 08/17/2018 10:30 AM, Sitech wrote:
> Hi,
> When I wanna to use 4a to manager an external sound card and play some
> music, but i got some errors, i think must be some problem in my
> configuration files. So i hope friends to give me some advices, here is
> my log and attachment is my configuration file.
>
> ```log
> Aug 8 08:28:30 raspberrypi3 daemon.info
> afbd-agl-service-audio-4a@1.0-11d2ae9[538]: INFO: [API smixer]
> MixerAttachVerb set RAMPS
> [/usr/src/debug/4a-softmixer/0.1+gitAUTOINC+ded8e37b50-r0/git/plugins/alsa/alsa-api-mixer.c:608,MixerAttachVerb]
> Aug 8 08:28:30 raspberrypi3 daemon.info
> afbd-agl-service-audio-4a@1.0-11d2ae9[538]: INFO: [API smixer]
> MixerAttachVerb set STREAMS
> [/usr/src/debug/4a-softmixer/0.1+gitAUTOINC+ded8e37b50-r0/git/plugins/alsa/alsa-api-mixer.c:618,MixerAttachVerb]
> Aug 8 08:28:30 raspberrypi3 daemon.info
> afbd-agl-service-audio-4a@1.0-11d2ae9[538]: INFO: [API smixer]
> ApiStreamAttach: 2ch-generic-usb prefix 2ch-usb
> [/usr/src/debug/4a-softmixer/0.1+gitAUTOINC+ded8e37b50-r0/git/plugins/alsa/alsa-api-streams.c:508,ApiStreamAttach]
> Aug 8 08:28:30 raspberrypi3 daemon.notice
> afbd-agl-service-audio-4a@1.0-11d2ae9[538]: NOTICE: [API smixer]
> ApiPcmSetParams:multimedia format set to SND_PCM_FORMAT_S16_LE
> [/usr/src/debug/4a-softmixer/0.1+gitAUTOINC+ded8e37b50-r0/git/plugins/alsa/alsa-api-pcm.c:401,ApiPcmSetPar
> Aug 8 08:28:30 raspberrypi3 daemon.notice
> afbd-agl-service-audio-4a@1.0-11d2ae9[538]: NOTICE: [API smixer]
> ApiPcmSetParams:multimedia access set to (null)
> [/usr/src/debug/4a-softmixer/0.1+gitAUTOINC+ded8e37b50-r0/git/plugins/alsa/alsa-api-pcm.c:420,ApiPcmSetParams]
> Aug 8 08:28:30 raspberrypi3 daemon.info
> afbd-agl-service-audio-4a@1.0-11d2ae9[538]: INFO: [API smixer]
> CreateOneStream, stream 2ch-generic-usb multimedia, source (null), sink
> full-stereo, mute 0
> [/usr/src/debug/4a-softmixer/0.1+gitAUTOINC+ded8e37b50-r0/git/plugins/alsa/alsa
> Aug 8 08:28:30 raspberrypi3 daemon.info
> afbd-agl-service-audio-4a@1.0-11d2ae9[538]: INFO: [API smixer]
> CreateOneStream: 2ch-generic-usb not found in loop, look in sources
> [/usr/src/debug/4a-softmixer/0.1+gitAUTOINC+ded8e37b50-r0/git/plugins/alsa/alsa-api-streams.c:218,Creat
> Aug 8 08:28:30 raspberrypi3 daemon.err
> afbd-agl-service-audio-4a@1.0-11d2ae9[538]: ERROR: [API smixer]
> CreateOneStream: mixer=Alsa-Mixer stream=multimedia not found in
> loops/sources
> [/usr/src/debug/4a-softmixer/0.1+gitAUTOINC+ded8e37b50-r0/git/plugins/alsa/alsa-api-streams
> Aug 8 08:28:30 raspberrypi3 daemon.err
> afbd-agl-service-audio-4a@1.0-11d2ae9[538]: ERROR: [API smixer]
> AttachOneStream: failed to create stream
> [/usr/src/debug/4a-softmixer/0.1+gitAUTOINC+ded8e37b50-r0/git/plugins/alsa/alsa-api-streams.c:494,AttachOneStream]
> Aug 8 08:28:30 raspberrypi3 daemon.err
> afbd-agl-service-audio-4a@1.0-11d2ae9[538]: ERROR: [API smixer]
> AttachOneStream fail
> [/usr/src/debug/4a-softmixer/0.1+gitAUTOINC+ded8e37b50-r0/git/plugins/alsa/alsa-api-streams.c:502,AttachOneStream]
> Aug 8 08:28:30 raspberrypi3 daemon.warn
> afbd-agl-service-audio-4a@1.0-11d2ae9[538]: WARNING: [API
> 4a-hal-2ch-generic-usb] Api smixer and verb attach found, but this error
> was raised : 'invalid-syntax' with this info : 'ApiStreamAttach:
> mixer=Alsa-Mixer invalid stream= { "ui
> Aug 8 08:28:30 raspberrypi3 daemon.err
> afbd-agl-service-audio-4a@1.0-11d2ae9[538]: ERROR: [API
> 4a-hal-2ch-generic-usb] Error -10 during call to verb attach of smixer
> api with status 'invalid-syntax' and info 'ApiStreamAttach:
> mixer=Alsa-Mixer invalid stream= { "uid": "mult
> Aug 8 08:28:30 raspberrypi3 daemon.err
> afbd-agl-service-audio-4a@1.0-11d2ae9[538]: ERROR: [API
> 4a-hal-2ch-generic-usb] HalCtlsInitOneApi: Error -7 while attaching to
> mixer
> [/home/albert/files/agl/code/audio-4a-backup/4a-hal-generic/4a-hal/4a-hal-controllers/4a-hal-controll
> Aug 8 08:28:30 raspberrypi3 daemon.err
> afbd-agl-service-audio-4a@1.0-11d2ae9[538]: ERROR: Initialisation of
> service API 4a-hal-2ch-generic-usb failed (-4): Success
> [/home/albert/files/agl/code/app-framework-binder-2/src/afb-export.c:1702,afb_export_start]
> Aug 8 08:28:30 raspberrypi3 daemon.err
> afbd-agl-service-audio-4a@1.0-11d2ae9[538]: ERROR: The api
> 4a-hal-2ch-generic-usb failed to start
> [/home/albert/files/agl/code/app-framework-binder-2/src/afb-apiset.c:799,start_api]
> ```
>
> raspberrypi3:~# aplay -l
> **** List of PLAYBACK Hardware Devices ****
> card 0: Loopback [Loopback], device 0: Loopback PCM [Loopback PCM]
> Subdevices: 8/8
> Subdevice #0: subdevice #0
> Subdevice #1: subdevice #1
> Subdevice #2: subdevice #2
> Subdevice #3: subdevice #3
> Subdevice #4: subdevice #4
> Subdevice #5: subdevice #5
> Subdevice #6: subdevice #6
> Subdevice #7: subdevice #7
> card 0: Loopback [Loopback], device 1: Loopback PCM [Loopback PCM]
> Subdevices: 8/8
> Subdevice #0: subdevice #0
> Subdevice #1: subdevice #1
> Subdevice #2: subdevice #2
> Subdevice #3: subdevice #3
> Subdevice #4: subdevice #4
> Subdevice #5: subdevice #5
> Subdevice #6: subdevice #6
> Subdevice #7: subdevice #7
> card 1: Device [USB Audio Device], device 0: USB Audio [USB Audio]
> Subdevices: 1/1
> Subdevice #0: subdevice #0
> card 2: ALSA [bcm2835 ALSA], device 0: bcm2835 ALSA [bcm2835 ALSA]
> Subdevices: 8/8
> Subdevice #0: subdevice #0
> Subdevice #1: subdevice #1
> Subdevice #2: subdevice #2
> Subdevice #3: subdevice #3
> Subdevice #4: subdevice #4
> Subdevice #5: subdevice #5
> Subdevice #6: subdevice #6
> Subdevice #7: subdevice #7
> card 2: ALSA [bcm2835 ALSA], device 1: bcm2835 ALSA [bcm2835 IEC958/HDMI]
> Subdevices: 1/1
> Subdevice #0: subdevice #0
> card 3: vc4hdmi [vc4-hdmi], device 0: MAI PCM vc4-hdmi-hifi-0 []
> Subdevices: 1/1
> Subdevice #0: subdevice #0
>
> raspberrypi3:/dev/snd# ls ./* -al
> crw-rw---- 1 root audio 116, 0 Aug 8 08:28 ./controlC0
> crw-rw---- 1 root audio 116, 32 Aug 8 08:28 ./controlC1
> crw-rw---- 1 root audio 116, 64 Aug 8 08:28 ./controlC2
> crw-rw---- 1 root audio 116, 96 Aug 8 08:28 ./controlC3
> crw-rw---- 1 root audio 116, 24 Aug 8 08:28 ./pcmC0D0c
> crw-rw---- 1 root audio 116, 16 Aug 8 08:28 ./pcmC0D0p
> crw-rw---- 1 root audio 116, 25 Aug 8 08:28 ./pcmC0D1c
> crw-rw---- 1 root audio 116, 17 Aug 8 08:28 ./pcmC0D1p
> crw-rw---- 1 root audio 116, 56 Aug 8 08:28 ./pcmC1D0c
> crw-rw---- 1 root audio 116, 48 Aug 8 08:28 ./pcmC1D0p
> crw-rw---- 1 root audio 116, 80 Aug 8 08:28 ./pcmC2D0p
> crw-rw---- 1 root audio 116, 81 Aug 8 08:28 ./pcmC2D1p
> crw-rw---- 1 root audio 116, 112 Aug 8 08:28 ./pcmC3D0p
> crw-rw----. 1 root audio 116, 1 Aug 8 08:28 ./seq
> crw-rw---- 1 root audio 116, 33 Aug 8 08:28 ./timer
>
> ./by-id:
> total 0
> drwxr-xr-x. 2 root root 60 Aug 8 08:28 .
> drwxr-xr-x. 4 root root 380 Aug 8 08:28 ..
> lrwxrwxrwx 1 root root 12 Aug 8 08:28
> usb-C-Media_Electronics_Inc._USB_Audio_Device-00 -> ../controlC1
>
> ./by-path:
> total 0
> drwxr-xr-x. 2 root root 120 Aug 8 08:28 .
> drwxr-xr-x. 4 root root 380 Aug 8 08:28 ..
> lrwxrwxrwx. 1 root root 12 Aug 8 08:28 platform-3f902000.hdmi ->
> ../controlC3
> lrwxrwxrwx 1 root root 12 Aug 8 08:28
> platform-3f980000.usb-usb-0:1.3:1.0 -> ../controlC1
> lrwxrwxrwx. 1 root root 12 Aug 8 08:28 platform-snd_aloop.0 ->
> ../controlC0
> lrwxrwxrwx 1 root root 12 Aug 8 08:28 platform-soc:audio -> ../controlC2
>
>
> raspberrypi3:/dev/snd# ls /proc/asound/ -al
> total 0
> dr-xr-xr-x 8 root root 0 Aug 8 08:54 .
> dr-xr-xr-x 185 root root 0 Jan 1 1970 ..
> lrwxrwxrwx 1 root root 5 Aug 8 08:54 ALSA -> card2
> lrwxrwxrwx 1 root root 5 Aug 8 08:54 Device -> card1
> lrwxrwxrwx 1 root root 5 Aug 8 08:54 Loopback -> card0
> dr-xr-xr-x 6 root root 0 Aug 8 08:54 card0
> dr-xr-xr-x 4 root root 0 Aug 8 08:54 card1
> dr-xr-xr-x 4 root root 0 Aug 8 08:54 card2
> dr-xr-xr-x 3 root root 0 Aug 8 08:54 card3
> -r--r--r-- 1 root root 0 Aug 8 08:54 cards
> -r--r--r-- 1 root root 0 Aug 8 08:54 devices
> -r--r--r-- 1 root root 0 Aug 8 08:54 hwdep
> dr-xr-xr-x 2 root root 0 Aug 8 08:54 oss
> -r--r--r-- 1 root root 0 Aug 8 08:54 pcm
> dr-xr-xr-x 2 root root 0 Aug 8 08:54 seq
> -r--r--r-- 1 root root 0 Aug 8 08:54 timers
> lrwxrwxrwx 1 root root 5 Aug 8 08:54 vc4hdmi -> card3
> -r--r--r-- 1 root root 0 Aug 8 08:54 version
> raspberrypi3:/dev/snd# cat /proc/asound/devices
> 0: [ 0] : control
> 16: [ 0- 0]: digital audio playback
> 17: [ 0- 1]: digital audio playback
> 24: [ 0- 0]: digital audio capture
> 25: [ 0- 1]: digital audio capture
> 32: [ 1] : control
> 33: : timer
> 48: [ 1- 0]: digital audio playback
> 56: [ 1- 0]: digital audio capture
> 64: [ 2] : control
> 80: [ 2- 0]: digital audio playback
> 81: [ 2- 1]: digital audio playback
> 96: [ 3] : control
> 112: [ 3- 0]: digital audio playback
>
>
> Thanks,
> Sitech
>
>
> _______________________________________________
> automotive-discussions mailing list
> automotive-discussions@xxxxxxxxxxxxxxxxxxxxxxxxx
> https://lists.linuxfoundation.org/mailman/listinfo/automotive-discussions
>
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