[PATCH] ALSA: usb-audio: Add native DSD support for Cambridge Audio streamers

[Matus Gajdos <matuszpd@gmail.com>]

The Cambridge Audio streamer advertises the UAC2 RAW_DATA format on
altsetting 2 of its playback interface, but without the DSD_RAW quirk
flag the driver exposes it only as a SPECIAL format that cannot be
used.

Add QUIRK_FLAG_DSD_RAW for the device (USB ID 22e8:ca10), so the
altsetting is exposed as DSD_U32_BE, enabling native DSD64/128/256
playback.

Tested with: gst-launch-1.0 filesrc location=file.dsf ! \
                            avdemux_dsf ! dsdconvert ! \
                            alsasink device=hw:2,0

Signed-off-by: Matus Gajdos <matuszpd@gmail.com>
---
 sound/usb/quirks.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/sound/usb/quirks.c b/sound/usb/quirks.c
index 38d78b8345f17..6176acc04c6e9 100644
--- a/sound/usb/quirks.c
+++ b/sound/usb/quirks.c
@@ -2730,6 +2730,8 @@ static const struct usb_audio_quirk_flags_table quirk_flags_table[] = {
 		   QUIRK_FLAG_DSD_RAW),
 	DEVICE_FLG(0x21b4, 0x0232, /* Ayre QX-5 Twenty */
 		   QUIRK_FLAG_DSD_RAW),
+	DEVICE_FLG(0x22e8, 0xca10, /* Cambridge Audio streamers */
+		   QUIRK_FLAG_DSD_RAW),
 	DEVICE_FLG(0x2522, 0x0007, /* LH Labs Geek Out HD Audio 1V5 */
 		   QUIRK_FLAG_SET_IFACE_FIRST),
 	DEVICE_FLG(0x25aa, 0x600b, /* TAE1159 */
-- 
2.43.0