diff options
| author | Nobutaka Okabe <nob77413@gmail.com> | 2016-12-12 17:24:08 +0100 |
|---|---|---|
| committer | Takashi Iwai <tiwai@suse.de> | 2016-12-12 22:42:33 +0100 |
| commit | 7f38ca047b0cb54df7f6d9e4110e292e45dba6ad (patch) | |
| tree | ecdfc47b5701a3076058589e06dac291fa3614e6 | |
| parent | Merge tag 'asoc-v4.10' of git://git.kernel.org/pub/scm/linux/kernel/git/broon... (diff) | |
| download | linux-7f38ca047b0cb54df7f6d9e4110e292e45dba6ad.tar.xz linux-7f38ca047b0cb54df7f6d9e4110e292e45dba6ad.zip | |
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>
| -rw-r--r-- | sound/usb/quirks.c | 38 |
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; } |