[alsa-devel] USB Audio Interface / Denon MC7000 and MC8000 controller

[Oszlanyi Tobias]

Hello Alexander. I compiled the kernel with your patch but the result unfortunately it's the same. The audio device is still not working, dmesg shows the same message that clock source is not valid. Any other idea?
Thanks a lotTobias

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  Am Di., Jan. 21, 2020 at 12:00 schrieb Alexander Tsoy<alexander at tsoy.me>:   Please try the patch below. Make sure that no other patches are applied.

diff --git a/sound/usb/quirks.c b/sound/usb/quirks.c
index 82184036437b..7264f57d3188 100644
--- a/sound/usb/quirks.c
+++ b/sound/usb/quirks.c
@@ -1553,6 +1553,13 @@ void snd_usb_ctl_msg_quirk(struct usb_device *dev, unsigned int pipe,
         && (requesttype & USB_TYPE_MASK) == USB_TYPE_CLASS)
         msleep(20);
 
+    /*
+    * Denon MC7000
+    */
+    if (chip->usb_id == USB_ID(0x15e4, 0x8004) &&
+        (requesttype & USB_TYPE_MASK) == USB_TYPE_CLASS)
+        msleep(20);
+
     /* Zoom R16/24, Logitech H650e, Jabra 550a needs a tiny delay here,
     * otherwise requests like get/set frequency return as failed despite
     * actually succeeding.


В Вт, 21/01/2020 в 09:17 +0100, Tobias пишет:
> Thanks a lot for the hint Alexander. Anyhow, I am not sure where to put 
> that.
> Also Takashi Iwai was involved already and I would like to prevent 
> mixing up things or double work.
> 
> Please advise in detail what I would need to do as I am not a programmer.
> 
> Thanks a lot.
> Tobias
> 
> Am 20.01.20 um 09:22 schrieb Alexander Tsoy:
> > В Сб, 14/12/2019 в 09:24 +0100, Tobias пишет:
> > > Hello dear ALSA developers.
> > > 
> > > I have purchased a MC7000 controller in order to control MIXXX on
> > > Ubuntu
> > > 16.04. According to the Denon specification the controller should
> > > have
> > > been class compliant but there is an issue with the Audio interface
> > > to
> > > work properly giving following message ...
> > > 
> > > $ dmesg
> > > ...
> > > > [  74.522831] usb 1-1.3: new high-speed USB device number 6 using
> > > > xhci_hcd
> > > [  74.623784] usb 1-1.3: New USB device found, idVendor=15e4,
> > > idProduct=8004
> > > [  74.623789] usb 1-1.3: New USB device strings: Mfr=1, Product=2,
> > > SerialNumber=3
> > > [  74.623793] usb 1-1.3: Product: DENON DJ MC7000
> > > [  74.623796] usb 1-1.3: Manufacturer: DENON DJ
> > > [  74.623798] usb 1-1.3: SerialNumber: 201603
> > > [  74.625134] usb 1-1.3: clock source 65 is not valid, cannot use
> > > 
> > > "|||clock source 65 is not valid, cannot use" is repeated
> > > uncountable
> > > times then
> > > 
> > Please try to add delay after each class control request in
> > snd_usb_ctl_msg_quirk():
> > 
> >      if (chip->usb_id == USB_ID(0x15e4, 0x8004) &&
> >          (requesttype & USB_TYPE_MASK) == USB_TYPE_CLASS)
> >          msleep(20);
> >