linux-kernel - [PATCH AUTOSEL 4.18 67/88] ALSA: usb-audio: Generic DSD detection for Thesycon-based implementations

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Date:   Fri, 7 Sep 2018 00:36:40 +0000
From:   Sasha Levin <Alexander.Levin@...rosoft.com>
To:     "stable@...r.kernel.org" <stable@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
CC:     Yue Wang <yuleopen@...il.com>, Takashi Iwai <tiwai@...e.de>,
        Sasha Levin <Alexander.Levin@...rosoft.com>
Subject: [PATCH AUTOSEL 4.18 67/88] ALSA: usb-audio: Generic DSD detection for
 Thesycon-based implementations

From: Yue Wang <yuleopen@...il.com>

[ Upstream commit 1ea0358ecb848058b35b6da13d7f4c08610a73a8 ]

Thesycon provides solutions to XMOS chips, and has its own device
vendor id.

In this patch, we use generic method to detect DSD capability of
Thesycon-based UAC2 implementations in order to support a wide range
of current and future devices.

The patch will enable the SNDRV_PCM_FMTBIT_DSD_U32_BE bit for the DAC
hence enable native DSD playback up to DSD512 format.

Signed-off-by: Yue Wang <yuleopen@...il.com>
Signed-off-by: Takashi Iwai <tiwai@...e.de>
Signed-off-by: Sasha Levin <alexander.levin@...rosoft.com>
---
 sound/usb/quirks.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/sound/usb/quirks.c b/sound/usb/quirks.c
index 6fbafce0aa6b..dde87d64bc32 100644
--- a/sound/usb/quirks.c
+++ b/sound/usb/quirks.c
@@ -1444,6 +1444,7 @@ u64 snd_usb_interface_dsd_format_quirks(struct snd_usb_audio *chip,
 	 */
 	switch (USB_ID_VENDOR(chip->usb_id)) {
 	case 0x20b1:  /* XMOS based devices */
+	case 0x152a:  /* Thesycon devices */
 	case 0x25ce:  /* Mytek devices */
 		if (fp->dsd_raw)
 			return SNDRV_PCM_FMTBIT_DSD_U32_BE;
-- 
2.17.1