Re: missing sound on kernel-5.15

[chihhao chen <chihhao.chen@mediatek.com>]

Hi Takashi,

I also think it should be a firmware problem but it happens with many
different devices because of new set sampling rate behavior in k5.15.

Device 1 UAC1
[  134.924359][T1000005] kworker/0:0: usb 1-1: [name:usbcore&]New USB
device found, idVendor=04e8, idProduct=a04f, bcdDevice= 1.00
[  134.925944][T1000005] kworker/0:0: usb 1-1: [name:usbcore&]New USB
device strings: Mfr=1, Product=2, SerialNumber=3
[  134.927338][T1000005] kworker/0:0: usb 1-1: [name:usbcore&]Product:
Samsung USB C Earphone
[  134.928426][T1000005] kworker/0:0: usb 1-1:
[name:usbcore&]Manufacturer: bestechnic
[  134.929432][T1000005] kworker/0:0: usb 1-1:
[name:usbcore&]SerialNumber: 20160406.1

Device 2 UAC3
[  779.645324][T1003414] kworker/0:1: usb 1-1: [name:usbcore&]New USB
device found, idVendor=05ac, idProduct=110a, bcdDevice=26.11
[  779.647376][T1003414] kworker/0:1: usb 1-1: [name:usbcore&]New USB
device strings: Mfr=1, Product=2, SerialNumber=3
[  779.649492][T1003414] kworker/0:1: usb 1-1: [name:usbcore&]Product:
USB-C to 3.5mm Headphone Jack Adapter
[  779.652262][T1003414] kworker/0:1: usb 1-1:
[name:usbcore&]Manufacturer: Apple, Inc.
[  779.652273][T1003414] kworker/0:1: usb 1-1:
[name:usbcore&]SerialNumber: DWH126301CLJKLTAF

Device 3
A XiaoMi adapter but it not in my hand now.

I will try to integrate k5.19 into my codebase.

Thanks


On Tue, 2022-08-30 at 09:02 +0200, Takashi Iwai wrote:
> On Tue, 30 Aug 2022 08:13:44 +0200,
> chihhao chen wrote:
> > 
> > Hi Takashi,
> > 
> > I tried the patch but this problem still happens.
> > 
> > I add some logs in snd_usb_init_sample_rate() in kernel-5.10
> > [  146.260105][T1702328] writer: usb 1-1: [name:snd_usb_audio&]2:2
> > Set
> > sample rate 96000, clock 0 protocol 0
> > [  146.289892][T1002328] writer: usb 1-1: [name:snd_usb_audio&]2:2
> > Set
> > sample rate 48000, clock 0 protocol 0
> > 
> > Because TinyAlsa tends to set highest rate for initialization and
> > real
> > rate for playback, it will still trigger two-times
> > SAMPLING_FREQ_CONTROL USB requests.
> 
> Then this is a firmware problem of your device.
> The same problem would happen even with the old kernel if you run the
> application with different sample rates.  Does the device work with
> 96kHz at all?
> 
> Could you give the lsusb -v output of the device, too?
> 
> > Which kernel version should I try? kernel-5.19 or?
> 
> Yes, 5.19 should suffice.
> 
> 
> Takashi