At Fri, 28 Nov 2014 14:04:31 +0100, Jurgen Kramer wrote:
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 | 42 ++++++++++++++++++++++++++++++++++++++++++ sound/usb/quirks.h | 3 +++ 3 files changed, 50 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 cc07388..40fb87f 100644 --- a/sound/usb/quirks.c +++ b/sound/usb/quirks.c @@ -1111,6 +1111,48 @@ 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) {
Put a space between switch and '('. Found in another patch, too.
case 2: /* DSD mode 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 1: /* PCM mode 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;
These two cases can combined one by passing fmt->altsetting-1 as the argument, right?
thanks,
Takashi