USB sound card connected, sound output is ok.
kvim:/ $ cat /proc/asound/cards
0 [AMLMESONAUDIO ]: AML-MESONAUDIO - AML-MESONAUDIO
AML-MESONAUDIO
1 [Device ]: USB-Audio - USB Sound Device
USB Sound Device at usb-xhci-hcd.0.auto-1.3, full speed
When any app captures microphone, it fails with such logcat output:
12-16 21:17:04.891 3271 4020 I audio_hw_primary: ++adev_create_audio_patch, src_config->ext.device.type(0x80000004)
12-16 21:17:04.891 3271 4020 I audio_hw_primary: +adev_create_audio_patch num_sources [1] , num_sinks [1],src_config->type=1,sink_config->type=2,aml_dev->patch_src=11
12-16 21:17:04.891 3271 4020 I audio_hw_primary: --register_audio_patch: after registering new patch, patch sets will be:
12-16 21:17:04.891 3271 4020 I audio_hw_primary: adev_create_audio_patch(), patch new handle for AF: 0xab38128c
12-16 21:17:04.891 3271 4020 I audio_hw_primary: aml_audio_input_routing: inport [0x6]BUILTIN_MICIN already exists, do nothing
12-16 21:17:04.891 3271 4020 I audio_hw_primary: adev_create_audio_patch: device->mix patch: inport([0x6]BUILTIN_MICIN)
12-16 21:17:04.899 3271 8993 D audio_hw_primary: *start_input_stream, open alsa_card(0) alsa_device(11), in_device:0x4
12-16 21:17:04.899 3271 8993 E audio_hw_primary: start_input_stream: cannot open pcm_in driver: cannot open device ‘/dev/snd/pcmC0D11c’: No such file or directory
12-16 21:17:04.899 3271 8993 E audio_hw_primary: in_read: read failed - sleeping for buffer duration
12-16 21:17:04.964 3271 8993 D audio_hw_primary: *start_input_stream, open alsa_card(0) alsa_device(11), in_device:0x4
12-16 21:17:04.964 3271 8993 E audio_hw_primary: start_input_stream: cannot open pcm_in driver: cannot open device ‘/dev/snd/pcmC0D11c’: No such file or directory
12-16 21:17:04.964 3271 8993 E audio_hw_primary: in_read: read failed - sleeping for buffer duration
12-16 21:17:05.029 3271 8993 D audio_hw_primary: *start_input_stream, open alsa_card(0) alsa_device(11), in_device:0x4
12-16 21:17:05.029 3271 8993 E audio_hw_primary: start_input_stream: cannot open pcm_in driver: cannot open device ‘/dev/snd/pcmC0D11c’: No such file or directory
12-16 21:17:05.029 3271 8993 E audio_hw_primary: in_read: read failed - sleeping for buffer duration
12-16 21:17:05.095 3271 8993 D audio_hw_primary: *start_input_stream, open alsa_card(0) alsa_device(11), in_device:0x4
12-16 21:17:05.095 3271 8993 E audio_hw_primary: start_input_stream: cannot open pcm_in driver: cannot open device ‘/dev/snd/pcmC0D11c’: No such file or directory
12-16 21:17:05.095 3271 8993 E audio_hw_primary: in_read: read failed - sleeping for buffer duration
12-16 21:17:05.161 3271 8993 D audio_hw_primary: *start_input_stream, open alsa_card(0) alsa_device(11), in_device:0x4
12-16 21:17:05.162 3271 8993 E audio_hw_primary: start_input_stream: cannot open pcm_in driver: cannot open device ‘/dev/snd/pcmC0D11c’: No such file or directory
12-16 21:17:05.162 3271 8993 E audio_hw_primary: in_read: read failed - sleeping for buffer duration
12-16 21:17:05.227 3271 8993 D audio_hw_primary: *start_input_stream, open alsa_card(0) alsa_device(11), in_device:0x4
12-16 21:17:05.228 3271 8993 E audio_hw_primary: start_input_stream: cannot open pcm_in driver: cannot open device ‘/dev/snd/pcmC0D11c’: No such file or directory
12-16 21:17:05.228 3271 8993 E audio_hw_primary: in_read: read failed - sleeping for buffer duration
12-16 21:17:05.292 3271 8993 D audio_hw_primary: *start_input_stream, open alsa_card(0) alsa_device(11), in_device:0x4
12-16 21:17:05.293 3271 8993 E audio_hw_primary: start_input_stream: cannot open pcm_in driver: cannot open device ‘/dev/snd/pcmC0D11c’: No such file or directory
12-16 21:17:05.293 3271 8993 E audio_hw_primary: in_read: read failed - sleeping for buffer duration
12-16 21:17:05.360 3271 8993 D audio_hw_primary: *start_input_stream, open alsa_card(0) alsa_device(11), in_device:0x4
12-16 21:17:05.361 3271 8993 E audio_hw_primary: start_input_stream: cannot open pcm_in driver: cannot open device ‘/dev/snd/pcmC0D11c’: No such file or directory
12-16 21:17:05.361 3271 8993 E audio_hw_primary: in_read: read failed - sleeping for buffer duration
12-16 21:17:05.427 3271 8993 D audio_hw_primary: *start_input_stream, open alsa_card(0) alsa_device(11), in_device:0x4
12-16 21:17:05.427 3271 8993 E audio_hw_primary: start_input_stream: cannot open pcm_in driver: cannot open device ‘/dev/snd/pcmC0D11c’: No such file or directory
12-16 21:17:05.427 3271 8993 E audio_hw_primary: in_read: read failed - sleeping for buffer duration
12-16 21:17:05.493 3271 8993 D audio_hw_primary: *start_input_stream, open alsa_card(0) alsa_device(11), in_device:0x4
12-16 21:17:05.495 3271 8993 E audio_hw_primary: start_input_stream: cannot open pcm_in driver: cannot open device ‘/dev/snd/pcmC0D11c’: No such file or directory
12-16 21:17:05.495 3271 8993 E audio_hw_primary: in_read: read failed - sleeping for buffer duration
12-16 21:17:05.560 3271 8993 D audio_hw_primary: *start_input_stream, open alsa_card(0) alsa_device(11), in_device:0x4
12-16 21:17:05.560 3271 8993 E audio_hw_primary: start_input_stream: cannot open pcm_in driver: cannot open device ‘/dev/snd/pcmC0D11c’: No such file or directory
12-16 21:17:05.560 3271 8993 E audio_hw_primary: in_read: read failed - sleeping for buffer duration