ALSA: usb-audio: Add DSD support for Comtrue USB Audio device

[ Upstream commit e9df1755485dd90a89656e8a21ec4d71c909fa30 ]

The vendor Comtrue Inc. (0x2fc6) produces USB audio chipsets like
the CT7601 which are capable of Native DSD playback.

This patch adds QUIRK_FLAG_DSD_RAW for Comtrue (VID 0x2fc6), which enables
native DSD playback (DSD_U32_LE) on their USB Audio device. This has been
verified under Ubuntu 25.04 with JRiver.

Signed-off-by: noble.yang <noble.yang@comtrue-inc.com>
Link: https://patch.msgid.link/20250731110614.4070-1-noble228@gmail.com
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/sound/usb/quirks.c b/sound/usb/quirks.c
index ac43bdf6e9ca6a75cbaa574bab450925e6018086..d4f4466b028c8dfca57eb275c28c5fe3b0ff82b7 100644 (file)
--- a/sound/usb/quirks.c
+++ b/sound/usb/quirks.c
@@ -2303,6 +2303,8 @@ static const struct usb_audio_quirk_flags_table quirk_flags_table[] = {
                   QUIRK_FLAG_DSD_RAW),
        VENDOR_FLG(0x2d87, /* Cayin device */
                   QUIRK_FLAG_DSD_RAW),
+       VENDOR_FLG(0x2fc6, /* Comture-inc devices */
+                  QUIRK_FLAG_DSD_RAW),
        VENDOR_FLG(0x3336, /* HEM devices */
                   QUIRK_FLAG_DSD_RAW),
        VENDOR_FLG(0x3353, /* Khadas devices */