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authorNobutaka Okabe <nob77413@gmail.com>2016-12-13 01:24:08 +0900
committerTakashi Iwai <tiwai@suse.de>2016-12-12 22:42:33 +0100
commit7f38ca047b0cb54df7f6d9e4110e292e45dba6ad (patch)
treeecdfc47b5701a3076058589e06dac291fa3614e6 /sound/usb
parent152fce5a2371f64c57abf99dbb0600cc18d399d4 (diff)
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ALSA: usb-audio: Add native DSD support for TEAC 501/503 DAC
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@gmail.com> Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'sound/usb')
-rw-r--r--sound/usb/quirks.c38
1 files changed, 38 insertions, 0 deletions
diff --git a/sound/usb/quirks.c b/sound/usb/quirks.c
index 2782155ae3ce..b3fd2382fdd9 100644
--- a/sound/usb/quirks.c
+++ b/sound/usb/quirks.c
@@ -1165,6 +1165,18 @@ static bool is_marantz_denon_dac(unsigned int id)
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)
{
@@ -1192,6 +1204,26 @@ int snd_usb_select_mode_quirk(struct snd_usb_substream *subs,
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;
}
@@ -1337,5 +1369,11 @@ u64 snd_usb_interface_dsd_format_quirks(struct snd_usb_audio *chip,
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;
}