From mboxrd@z Thu Jan  1 00:00:00 1970
From: Clemens Ladisch <clemens@ladisch.de>
Subject: Re: [PATCH] add native DSD support for XMOS based DACs.
Date: Fri, 05 Sep 2014 11:36:16 +0200
Message-ID: <54098410.6050103@ladisch.de>
References: <1409906971-3365-1-git-send-email-gtmkramer@xs4all.nl>
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To: Jurgen Kramer <gtmkramer@xs4all.nl>, alsa-devel@alsa-project.org
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Jurgen Kramer wrote:
> Add quirk for XMOS based DACs for native DSD playback support using the new DSD_U32_LE sample
> format. Works for all DAC vendors which use XMOS as idVendor. E.g. iFi Audio
> with their micro iDSD and nano iDSD.
>
> +++ b/sound/usb/quirks.c
> +	/* XMOS based DACs, e.g. iFi Audio micro/nano iDSD */
> +	if (le16_to_cpu(chip->dev->descriptor.idVendor) == 0x20b1) {
> +		switch (fp->altsetting) {
> +		case 2:
> +			return SNDRV_PCM_FMTBIT_DSD_U32_LE;

Can you confirm that all XMOS devices ever built will have DSD on that
alternate setting?


Regards,
Clemens