Re: [PATCH] ALSA: usb-audio: Add quirk flags for SC13A

[Takashi Iwai]

On Wed, 17 Jun 2026 04:52:34 +0200,
Ai Chao wrote:
> 
> The SC13A ( VID 0x1ff7, PID 0x0f81) not support reading the current
> sample rate and results in an error message printed to kmsg. Set
> QUIRK_FLAG_GET_SAMPLE_RATE to skip the sample rate check.
> 
> Quirky device sample:
>   usb 3-5.2.4.1: new high-speed USB device number 11 using xhci_hcd
>   usb 3-5.2.4.1: New USB device found, idVendor=1ff7, idProduct=0f81
>   usb 3-5.2.4.1: New USB device strings: Mfr=1, Product=2, SerialNumber=3
>   usb 3-5.2.4.1: Product: SC13A
>   usb 3-5.2.4.1: Manufacturer: Linux Foundation
>   usb 3-5.2.4.1: SerialNumber: 000002
>   usb 3-5.2.4.1: Found UVC 1.50 device SC13A (1ff7:0f81)
>   usb 3-5.2.4.1: 3:1: cannot get freq at ep 0x86
>   usb 3-5.2.4.1: Warning! Unlikely big volume range (=4096),
>     cval->res is probably wrong.
>   usb 3-5.2.4.1: [5] FU [Mic Capture Volume] ch = 1, val = 0/4096/1
>   usbcore: registered new interface driver snd-usb-audio
>   usb 3-5.2.4.1: 3:1: cannot get freq at ep 0x86
>   usb 3-5.2.4.1: 3:1: cannot get freq at ep 0x86
> 
> Signed-off-by: Ai Chao <aichao@xxxxxxxxxx>

Applied now.  Thanks.


Takashi