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ALSA: usb-audio: Do not expose PCM and DSD on same altsetting unless DoP

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Do not expose DSD altsetting as a PCM one, even if the descriptor claims
it to be PCM instead of special format.

Signed-off-by: Jussi Laako <jussi@sonarnerd.net>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Link: https://patch.msgid.link/20251211152224.1780782-3-jussi@sonarnerd.net
This commit is contained in:
Jussi Laako
2025-12-11 17:22:23 +02:00
committed by Takashi Iwai
parent 7fde61795d
commit 7141cb1092
1 changed files with 4 additions and 1 deletions
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5
sound/usb/format.c
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@@ -34,6 +34,7 @@ static u64 parse_audio_format_i_type(struct snd_usb_audio *chip,
{
int sample_width, sample_bytes;
u64 pcm_formats = 0;
u64 dsd_formats = 0;
switch (fp->protocol) {
case UAC_VERSION_1:
@@ -154,7 +155,9 @@ static u64 parse_audio_format_i_type(struct snd_usb_audio *chip,
fp->iface, fp->altsetting, format);
}
pcm_formats |= snd_usb_interface_dsd_format_quirks(chip, fp, sample_bytes);
dsd_formats |= snd_usb_interface_dsd_format_quirks(chip, fp, sample_bytes);
if (dsd_formats && !fp->dsd_dop)
pcm_formats = dsd_formats;
return pcm_formats;
}