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ALSA: usb-audio: Add mode select quirk for Denon/Marantz DACs 

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>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Jurgen Kramer 2014-11-28 17:32:54 +01:00 committed by Takashi Iwai
parent 7a2e9ddc90
commit 6874daad4b
3 changed files with 46 additions and 0 deletions
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5
sound/usb/pcm.c
View File

@ -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,

38
sound/usb/quirks.c
View File

@ -1111,6 +1111,44 @@ 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)
{
/*

3
sound/usb/quirks.h
View File

@ -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);