From: Abhinav Mahadevan <abhi220204@gmail.com>
Date: Fri, 10 Apr 2026 14:33:35 +0000 (+0530)
Subject: ALSA: usb-audio: Add quirk for PreSonus AudioBox USB
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=34fe4a9df2476f52a809d0cd9659ff73de605774;p=thirdparty%2Fkernel%2Flinux.git

ALSA: usb-audio: Add quirk for PreSonus AudioBox USB

The PreSonus AudioBox USB (0x194f:0x0301) only supports S24_3LE
format for both playback and capture. It does not support S16_LE
despite being a USB full-speed device. Add explicit format quirks
for both the playback (interface 2) and capture (interface 3)
interfaces to ensure correct format negotiation.

Signed-off-by: Abhinav Mahadevan <abhi220204@gmail.com>
Link: https://patch.msgid.link/20260410143335.5974-1-abhi220204@gmail.com
Signed-off-by: Takashi Iwai <tiwai@suse.de>
---

diff --git a/sound/usb/quirks-table.h b/sound/usb/quirks-table.h
index b6dfe3b63c67..803e03d4d77b 100644
--- a/sound/usb/quirks-table.h
+++ b/sound/usb/quirks-table.h
@@ -2652,6 +2652,54 @@ YAMAHA_DEVICE(0x7010, "UB99"),
 		}
 	}
 },
+{
+	/*
+	 * The AudioBox USB advertises S24_3LE as the only supported format
+	 * for both playback and capture. It does not support S16_LE despite
+	 * being a USB full-speed device.
+	 */
+	USB_DEVICE(0x194f, 0x0301),
+	QUIRK_DRIVER_INFO {
+		.vendor_name = "PreSonus",
+		.product_name = "AudioBox USB",
+		QUIRK_DATA_COMPOSITE {
+			{ QUIRK_DATA_IGNORE(0) },
+			{
+				QUIRK_DATA_AUDIOFORMAT(2) {
+					.formats = SNDRV_PCM_FMTBIT_S24_3LE,
+					.channels = 2,
+					.iface = 2,
+					.altsetting = 1,
+					.altset_idx = 1,
+					.attributes = 0,
+					.endpoint = 0x01,
+					.ep_attr = USB_ENDPOINT_XFER_ISOC,
+					.rates = SNDRV_PCM_RATE_44100 |
+						 SNDRV_PCM_RATE_48000,
+					.rate_min = 44100,
+					.rate_max = 48000,
+				}
+			},
+			{
+				QUIRK_DATA_AUDIOFORMAT(3) {
+					.formats = SNDRV_PCM_FMTBIT_S24_3LE,
+					.channels = 2,
+					.iface = 3,
+					.altsetting = 1,
+					.altset_idx = 1,
+					.attributes = 0,
+					.endpoint = 0x82,
+					.ep_attr = USB_ENDPOINT_XFER_ISOC,
+					.rates = SNDRV_PCM_RATE_44100 |
+						 SNDRV_PCM_RATE_48000,
+					.rate_min = 44100,
+					.rate_max = 48000,
+				}
+			},
+			QUIRK_COMPOSITE_END
+		}
+	}
+},
 #endif /* disabled */
 
 {