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([2a01:c844:24b3:f700:590:d876:1636:b79b]) by smtp.gmail.com with ESMTPSA id ffacd0b85a97d-48b82253e5bsm5054351f8f.1.2026.10.02.05.53.13 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 02 Oct 2026 05:53:13 -0700 (PDT) From: Matus Gajdos To: Jaroslav Kysela , Takashi Iwai Cc: linux-sound@vger.kernel.org, linux-kernel@vger.kernel.org, Matus Gajdos Subject: [PATCH] ALSA: usb-audio: Add native DSD support for Cambridge Audio streamers Date: Fri, 2 Oct 2026 14:52:37 +0200 Message-ID: <20261002125237.82188-1-matuszpd@gmail.com> X-Mailer: git-send-email 2.43.0 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 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 --- 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