4.9-stable review patch. If anyone has any objections, please let me know.
------------------
From: Nobutaka Okabe <nob77413@xxxxxxxxx>
[ Upstream commit 7f38ca047b0cb54df7f6d9e4110e292e45dba6ad ]
This patch adds native DSD support for the following devices.
- TEAC NT-503
- TEAC UD-503
- TEAC UD-501
(1) Add quirks for native DSD support for TEAC devices.
(2) A specific vendor command is needed to switch between PCM/DOP and
DSD mode, same as Denon/Marantz devices.
Signed-off-by: Nobutaka Okabe <nob77413@xxxxxxxxx>
Signed-off-by: Takashi Iwai <tiwai@xxxxxxx>
Signed-off-by: Sasha Levin <alexander.levin@xxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
sound/usb/quirks.c | 38 ++++++++++++++++++++++++++++++++++++++
1 file changed, 38 insertions(+)
--- a/sound/usb/quirks.c
+++ b/sound/usb/quirks.c
@@ -1166,6 +1166,18 @@ static bool is_marantz_denon_dac(unsigne
return false;
}
+/* TEAC UD-501/UD-503/NT-503 USB DACs need a vendor cmd to switch
+ * between PCM/DOP and native DSD mode
+ */
+static bool is_teac_50X_dac(unsigned int id)
+{
+ switch (id) {
+ case USB_ID(0x0644, 0x8043): /* TEAC UD-501/UD-503/NT-503 */
+ return true;
+ }
+ return false;
+}
+
int snd_usb_select_mode_quirk(struct snd_usb_substream *subs,
struct audioformat *fmt)
{
@@ -1193,6 +1205,26 @@ int snd_usb_select_mode_quirk(struct snd
break;
}
mdelay(20);
+ } else if (is_teac_50X_dac(subs->stream->chip->usb_id)) {
+ /* Vendor mode switch cmd is required. */
+ switch (fmt->altsetting) {
+ case 3: /* DSD mode (DSD_U32) requested */
+ err = snd_usb_ctl_msg(dev, usb_sndctrlpipe(dev, 0), 0,
+ USB_DIR_OUT|USB_TYPE_VENDOR|USB_RECIP_INTERFACE,
+ 1, 1, NULL, 0);
+ if (err < 0)
+ return err;
+ break;
+
+ case 2: /* PCM or DOP mode (S32) requested */
+ case 1: /* PCM mode (S16) requested */
+ err = snd_usb_ctl_msg(dev, usb_sndctrlpipe(dev, 0), 0,
+ USB_DIR_OUT|USB_TYPE_VENDOR|USB_RECIP_INTERFACE,
+ 0, 1, NULL, 0);
+ if (err < 0)
+ return err;
+ break;
+ }
}
return 0;
}
@@ -1338,5 +1370,11 @@ u64 snd_usb_interface_dsd_format_quirks(
return SNDRV_PCM_FMTBIT_DSD_U32_BE;
}
+ /* TEAC devices with USB DAC functionality */
+ if (is_teac_50X_dac(chip->usb_id)) {
+ if (fp->altsetting == 3)
+ return SNDRV_PCM_FMTBIT_DSD_U32_BE;
+ }
+
return 0;
}