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