Denon/Marantz USB DACs need a specific vendor command to switch between PCM and DSD mode. This patch adds a new quirk function to switch between the two modes using the specific USB vendor command.

This patch applies to the following devices: - Marantz SA-14S1 - Marantz HD-DAC1

Signed-off-by: Jurgen Kramer gtmkramer@xs4all.nl --- sound/usb/pcm.c | 5 +++++ sound/usb/quirks.c | 36 ++++++++++++++++++++++++++++++++++++ sound/usb/quirks.h | 3 +++ 3 files changed, 44 insertions(+)

diff --git a/sound/usb/pcm.c b/sound/usb/pcm.c index c62a165..0d8aba5 100644 --- a/sound/usb/pcm.c +++ b/sound/usb/pcm.c @@ -482,6 +482,11 @@ static int set_format(struct snd_usb_substream *subs, struct audioformat *fmt) /* set interface */ if (subs->interface != fmt->iface || subs->altset_idx != fmt->altset_idx) { + + err = snd_usb_select_mode_quirk(subs, fmt); + if (err < 0) + return -EIO; + err = usb_set_interface(dev, fmt->iface, fmt->altsetting); if (err < 0) { dev_err(&dev->dev, diff --git a/sound/usb/quirks.c b/sound/usb/quirks.c index 7cb75e6..3735c97 100644 --- a/sound/usb/quirks.c +++ b/sound/usb/quirks.c @@ -1111,6 +1111,42 @@ void snd_usb_set_format_quirk(struct snd_usb_substream *subs, } }

+ +/* Marantz/Denon USB DACs need a vendor cmd to switch + * between PCM and native DSD mode */ +int snd_usb_select_mode_quirk(struct snd_usb_substream *subs, + struct audioformat *fmt) +{ + struct usb_device *dev = subs->dev; + int err; + + switch (subs->stream->chip->usb_id) { + case USB_ID(0x154e, 0x3005): /* Marantz HD-DAC1 */ + case USB_ID(0x154e, 0x3006): /* Marantz SA-14S1 */ + + /* First switch to alt set 0, otherwise the mode switch cmd + * will not be accepted by the DAC */ + err = usb_set_interface(dev, fmt->iface, 0); + if (err < 0) + return err; + + mdelay(20); /* Delay needed after setting the interface */ + + switch (fmt->altsetting) { + case 2: /* DSD mode requested */ + case 1: /* PCM mode requested */ + err = snd_usb_ctl_msg(dev, usb_sndctrlpipe(dev, 0), 0, + USB_DIR_OUT|USB_TYPE_VENDOR|USB_RECIP_INTERFACE, + fmt->altsetting-1, 1, NULL, 0); + if (err < 0) + return err; + break; + } + mdelay(20); + } + return 0; +} + void snd_usb_endpoint_start_quirk(struct snd_usb_endpoint *ep) { /* diff --git a/sound/usb/quirks.h b/sound/usb/quirks.h index 665e972..1b86238 100644 --- a/sound/usb/quirks.h +++ b/sound/usb/quirks.h @@ -31,6 +31,9 @@ void snd_usb_ctl_msg_quirk(struct usb_device *dev, unsigned int pipe, __u8 request, __u8 requesttype, __u16 value, __u16 index, void *data, __u16 size);

+int snd_usb_select_mode_quirk(struct snd_usb_substream *subs, + struct audioformat *fmt); + u64 snd_usb_interface_dsd_format_quirks(struct snd_usb_audio *chip, struct audioformat *fp, unsigned int sample_bytes);