[PATCH] ALSA: usb-audio: don't apply interface quirk to Presonus S1824c

[PATCH] ALSA: usb-audio: don't apply interface quirk to Presonus S1824c

[Roy Vegard Ovesen]

Testing with a Presonus STUDIO 1824c together with
a Behringer ultragain digital ADAT device shows that
using all 3 altno settings works fine.

When selecting sample rate, the driver sets the interface
to the correct altno setting and the correct number of
channels is set.

Selecting the correct altno setting via Ardour, Reaper or
whatever other way to set the sample rate is more convenient
than re-loading the driver module with device_setup to
set altno.

Signed-off-by: Roy Vegard Ovesen <roy.vegard.ovesen@gmail.com>
---
 sound/usb/quirks.c | 3 ---
 1 file changed, 3 deletions(-)

diff --git a/sound/usb/quirks.c b/sound/usb/quirks.c
index d736a4750356..7e8609ac6822 100644
--- a/sound/usb/quirks.c
+++ b/sound/usb/quirks.c
@@ -1599,9 +1599,6 @@ int snd_usb_apply_interface_quirk(struct snd_usb_audio *chip,
 	/* presonus studio 1810c: skip altsets incompatible with device_setup */
 	if (chip->usb_id == USB_ID(0x194f, 0x010c))
 		return s1810c_skip_setting_quirk(chip, iface, altno);
-	/* presonus studio 1824c: skip altsets incompatible with device_setup */
-	if (chip->usb_id == USB_ID(0x194f, 0x010d))
-		return s1810c_skip_setting_quirk(chip, iface, altno);
 
 	return 0;
 }
-- 
2.51.0

Re: [PATCH] ALSA: usb-audio: don't apply interface quirk to Presonus S1824c

[Takashi Iwai]

On Mon, 22 Sep 2025 20:54:10 +0200,
Roy Vegard Ovesen wrote:
> 
> Testing with a Presonus STUDIO 1824c together with
> a Behringer ultragain digital ADAT device shows that
> using all 3 altno settings works fine.
> 
> When selecting sample rate, the driver sets the interface
> to the correct altno setting and the correct number of
> channels is set.
> 
> Selecting the correct altno setting via Ardour, Reaper or
> whatever other way to set the sample rate is more convenient
> than re-loading the driver module with device_setup to
> set altno.
> 
> Signed-off-by: Roy Vegard Ovesen <roy.vegard.ovesen@gmail.com>

Thanks, applied.


Takashi