ALSA: usb-audio: add native DSD support for XMOS based DACs
Add quirks for XMOS based DACs for native DSD playback support using the new DSD_U32_LE sample format. This version adds native DSD support for: - iFi Audio micro iDSD/nano iDSD (they use the same prod. id) - DIYINHK USB to I2S/DSD converter Changes from v2: - fix and simplify switch statement Changes from v1: - use specific product id and alt setting per XMOS based device [fixed a misc coding style issue by tiwai] Signed-off-by: Jurgen Kramer <gtmkramer@xs4all.nl> Signed-off-by: Takashi Iwai <tiwai@suse.de>
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@ -1174,5 +1174,21 @@ u64 snd_usb_interface_dsd_format_quirks(struct snd_usb_audio *chip,
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}
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}
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/* XMOS based USB DACs */
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switch (chip->usb_id) {
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/* iFi Audio micro/nano iDSD */
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case USB_ID(0x20b1, 0x3008):
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if (fp->altsetting == 2)
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return SNDRV_PCM_FMTBIT_DSD_U32_LE;
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break;
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/* DIYINHK DSD DXD 384kHz USB to I2S/DSD */
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case USB_ID(0x20b1, 0x2009):
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if (fp->altsetting == 3)
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return SNDRV_PCM_FMTBIT_DSD_U32_LE;
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break;
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default:
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break;
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}
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return 0;
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}
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