Luxman DA-250 DSD support

gkkpch · October 13, 2021, 9:18pm

No, there are no entries for DA-06 or DA-250.
I do not know where you found the patch for the DA-06, it never made the official kernel. As you now know how to check this, you will see by yourself.

github.com

raspberrypi/linux/blob/ca2d815cbeb0af7be6efee12e62ef5ed19553348/sound/usb/quirks.c#L1727


      
          		usleep_range(5000, 6000);
          }
          
          /*
           * snd_usb_interface_dsd_format_quirks() is called from format.c to
           * augment the PCM format bit-field for DSD types. The UAC standards
           * don't have a designated bit field to denote DSD-capable interfaces,
           * hence all hardware that is known to support this format has to be
           * listed here.
           */
          u64 snd_usb_interface_dsd_format_quirks(struct snd_usb_audio *chip,
          					struct audioformat *fp,
          					unsigned int sample_bytes)
          {
          	struct usb_interface *iface;
          
          	/* Playback Designs */
          	if (USB_ID_VENDOR(chip->usb_id) == 0x23ba &&
          	    USB_ID_PRODUCT(chip->usb_id) < 0x0110) {
          		switch (fp->altsetting) {
          		case 1:

Above is kernel 5.10.y, so not even in the latest longterm support version.
By now I think I gave you enough info, there is nothing else I can do to help