>> >> > It's likely the issues with the implicit feedback.
>> >> >
>> >> > The latest development tree (either linux-next tree or
>> >> > topic/usb-audio-refactoring branch of my sound.git tree) contains the
>> >> > improvements of the implicit feedback mode.
>> >> >
>> >> >
>> >> > Takashi
>> When I try to play a file now this happens:
>> $ aplay -D plughw:CARD=UR22 ./file.wav
>> Playing WAVE './file.wav' : Signed 16 bit Little Endian, Rate 44100
>> Hz, Stereo
>> aplay: set_params:1407: Unable to install hw params:
>
> It's a known side-effect of the implicit feedback mode, and the latest
> patchset I mentioned earlier addresses the issue.
>
>
> Takashi
I'm already running the kernel built from the linux-next tree...
I built next-20201208 from
git://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git
Is there another patch set that I'm missing?
Hm, strange.
Please check the contents of /proc/asound/card*/stream* file. With
the latest patches and the implicit feedback mode, you should see the
lines like "Sync Endpoint: 0x...." and "Implicit Feedback Mode: yes".
Takashi
Yes, I see this:
Yamaha Corporation Steinberg UR22 at usb-0000:00:1a.7-3, high speed :
USB Audio
Playback:
Status: Stop
Interface 1
Altset 1
Format: S24_3LE
Channels: 2
Endpoint: 0x07 (7 OUT) (ASYNC)
Rates: 44100, 48000
Data packet interval: 125 us
Bits: 24
Channel map: FL FR
Sync Endpoint: 0x81 (1 IN)
Sync EP Interface: 2
Sync EP Altset: 1
Implicit Feedback Mode: Yes
Interface 1
Altset 2
Format: S24_3LE
Channels: 2
Endpoint: 0x07 (7 OUT) (ASYNC)
Rates: 88200, 96000
Data packet interval: 125 us
Bits: 24
Channel map: FL FR
Sync Endpoint: 0x81 (1 IN)
Sync EP Interface: 2
Sync EP Altset: 1
Implicit Feedback Mode: Yes
Interface 1
Altset 3
Format: S24_3LE
Channels: 2
Endpoint: 0x07 (7 OUT) (ASYNC)
Rates: 176400, 192000
Data packet interval: 125 us
Bits: 24
Channel map: FL FR
Sync Endpoint: 0x81 (1 IN)
Sync EP Interface: 2
Sync EP Altset: 1
Implicit Feedback Mode: Yes
Capture:
Status: Stop
Interface 2
Altset 1
Format: S24_3LE
Channels: 2
Endpoint: 0x86 (6 IN) (ASYNC)
Rates: 44100, 48000
Data packet interval: 125 us
Bits: 24
Channel map: FL FR
Interface 2
Altset 2
Format: S24_3LE
Channels: 2
Endpoint: 0x86 (6 IN) (ASYNC)
Rates: 88200, 96000
Data packet interval: 125 us
Bits: 24
Channel map: FL FR
Interface 2
Altset 3
Format: S24_3LE
Channels: 2
Endpoint: 0x86 (6 IN) (ASYNC)
Rates: 176400, 192000
Data packet interval: 125 us
Bits: 24
Channel map: FL FR
