Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit 7f38ca04 authored by Nobutaka Okabe's avatar Nobutaka Okabe Committed by Takashi Iwai
Browse files

ALSA: usb-audio: Add native DSD support for TEAC 501/503 DAC 



This patch adds native DSD support for the following devices.

- TEAC NT-503
- TEAC UD-503
- TEAC UD-501

(1) Add quirks for native DSD support for TEAC devices.
(2) A specific vendor command is needed to switch between PCM/DOP and
    DSD mode, same as Denon/Marantz devices.

Signed-off-by: default avatarNobutaka Okabe <nob77413@gmail.com>
Signed-off-by: default avatarTakashi Iwai <tiwai@suse.de>
parent 152fce5a

sound/usb/quirks.c

+38 −0
Original line number Diff line number Diff line
@@ -1165,6 +1165,18 @@ static bool is_marantz_denon_dac(unsigned int id) 
	return false;

}



/* TEAC UD-501/UD-503/NT-503 USB DACs need a vendor cmd to switch

 * between PCM/DOP and native DSD mode

 */

static bool is_teac_50X_dac(unsigned int id)

{

	switch (id) {

	case USB_ID(0x0644, 0x8043): /* TEAC UD-501/UD-503/NT-503 */

		return true;

	}

	return false;

}



int snd_usb_select_mode_quirk(struct snd_usb_substream *subs,

			      struct audioformat *fmt)

{
@@ -1192,6 +1204,26 @@ int snd_usb_select_mode_quirk(struct snd_usb_substream *subs, 
			break;

		}

		mdelay(20);

	} else if (is_teac_50X_dac(subs->stream->chip->usb_id)) {

		/* Vendor mode switch cmd is required. */

		switch (fmt->altsetting) {

		case 3: /* DSD mode (DSD_U32) 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 2: /* PCM or DOP mode (S32) requested */

		case 1: /* PCM mode (S16) 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;

		}

	}

	return 0;

}
@@ -1337,5 +1369,11 @@ u64 snd_usb_interface_dsd_format_quirks(struct snd_usb_audio *chip, 
			return SNDRV_PCM_FMTBIT_DSD_U32_BE;

	}



	/* TEAC devices with USB DAC functionality */

	if (is_teac_50X_dac(chip->usb_id)) {

		if (fp->altsetting == 3)

			return SNDRV_PCM_FMTBIT_DSD_U32_BE;

	}



	return 0;

}