[PATCH v3] ALSA: usb-audio: Add quirk for SmartlinkTechnology M01

[PATCH v3] ALSA: usb-audio: Add quirk for SmartlinkTechnology M01

[Juan Pablo Fuentealba Bizama]

Add quirk entry for SmartlinkTechnology M01 USB microphone to enable the standard mixer interface.

Signed-off-by: Juan Pablo Fuentealba Bizama <jpfuentealbabizama@gmail.com>
---
 sound/usb/quirks-table.h | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/sound/usb/quirks-table.h b/sound/usb/quirks-table.h
index 803e03d4d77b..283135d880db 100644
--- a/sound/usb/quirks-table.h
+++ b/sound/usb/quirks-table.h
@@ -3772,6 +3772,18 @@ YAMAHA_DEVICE(0x7010, "UB99"),
 		}
 	}
 },
+{
+	/*
+	 * SmartlinkTechnology M01
+	 * USB audio device that needs standard mixer quirk
+	 */
+	USB_DEVICE(0x301a, 0x159b),
+	QUIRK_DRIVER_INFO {
+		.vendor_name = "SmartlinkTechnology",
+		.product_name = "M01",
+		QUIRK_DATA_STANDARD_MIXER(QUIRK_ANY_INTERFACE)
+	}
+},
 #define QUIRK_RME_DIGIFACE(pid) \
 { \
 	/* Only claim interface 0 */ \
-- 
2.53.0

Re: [PATCH v3] ALSA: usb-audio: Add quirk for SmartlinkTechnology M01

[Takashi Iwai]

On Thu, 16 Apr 2026 21:11:49 +0200,
Juan Pablo Fuentealba Bizama wrote:
> 
> Add quirk entry for SmartlinkTechnology M01 USB microphone to enable the standard mixer interface.
> 
> Signed-off-by: Juan Pablo Fuentealba Bizama <jpfuentealbabizama@gmail.com>

Thanks, applied now.


Takashi

Re: [PATCH v3] ALSA: usb-audio: Add quirk for SmartlinkTechnology M01

[Juan Pablo Fuentealba Bizama]

Hi Takashi,

I've been testing this patch on the actual hardware (SmartlinkTechnology M01, 301a:159b) with a custom compiled kernel, and unfortunately it seems to cause a regression.

While the device is correctly detected and appears in /proc/asound/cards, it fails to create any PCM capture device (it's not listed by arecord -l). Before the patch, the device worked, albeit with low volume. Now it seems the quirk is insufficient to enable audio capture on this specific device, effectively muting it.

Given this, could we please revert this patch for now? I can prepare the revert patch and send it as v4 if that's the correct procedure.

Thanks,
Juan Pablo

Re: [PATCH v3] ALSA: usb-audio: Add quirk for SmartlinkTechnology M01

[Takashi Iwai]

On Fri, 17 Apr 2026 17:07:48 +0200,
Juan Pablo Fuentealba Bizama wrote:
> 
> Hi Takashi,
> 
> I've been testing this patch on the actual hardware (SmartlinkTechnology M01, 301a:159b) with a custom compiled kernel, and unfortunately it seems to cause a regression.
> 
> While the device is correctly detected and appears in /proc/asound/cards, it fails to create any PCM capture device (it's not listed by arecord -l). Before the patch, the device worked, albeit with low volume. Now it seems the quirk is insufficient to enable audio capture on this specific device, effectively muting it.
> 
> Given this, could we please revert this patch for now? I can prepare the revert patch and send it as v4 if that's the correct procedure.

OK, then let's scratch for now.


Takashi