From: Jussi Laako Date: Thu, 11 Dec 2025 15:22:23 +0000 (+0200) Subject: ALSA: usb-audio: Do not expose PCM and DSD on same altsetting unless DoP X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=7141cb1092eb5f30bbb0bcd298e01bbd2c4f0666;p=thirdparty%2Fkernel%2Flinux.git ALSA: usb-audio: Do not expose PCM and DSD on same altsetting unless DoP 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 Signed-off-by: Takashi Iwai Link: https://patch.msgid.link/20251211152224.1780782-3-jussi@sonarnerd.net --- diff --git a/sound/usb/format.c b/sound/usb/format.c index ec95a063beb1..64cfe4a9d8cd 100644 --- a/sound/usb/format.c +++ b/sound/usb/format.c @@ -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; }