[alsa-devel] [PATCH] add Steinberg UR44 USB Audio Interface support to quirks-table

[Clemens Ladisch]

Cyrus Harmon wrote:
> On Mar 11, 2014, at 1:31 AM, Clemens Ladisch wrote:
>> Strange; in theory, the driver should be able to pick up these
>> descriptors.
>>
>> Are there any error messages in the system log when you plug it in or
>> reload the unpatch snd-usb-audio driver?
>
> Mar 11 02:25:11 cbox kernel: [   82.426640] usb 2-1.6: new high-speed USB device number 4 using ehci-pci
> Mar 11 02:25:12 cbox kernel: [   82.515364] usb 2-1.6: New USB device found, idVendor=0499, idProduct=150e
> Mar 11 02:25:12 cbox kernel: [   82.515368] usb 2-1.6: New USB device strings: Mfr=1, Product=2, SerialNumber=0
> Mar 11 02:25:12 cbox kernel: [   82.515370] usb 2-1.6: Product: Steinberg UR44
> Mar 11 02:25:12 cbox kernel: [   82.515372] usb 2-1.6: Manufacturer: Yamaha Corporation
> Mar 11 02:25:12 cbox kernel: [   82.518134] snd-usb-audio: probe of 2-1.6:1.0 failed with error -5
> Mar 11 02:25:12 cbox kernel: [   82.523317] snd-usb-audio: probe of 2-1.6:1.1 failed with error -5

Please try the patch below to get more information in the log.


Regards,
Clemens


--- a/sound/usb/quirks.c
+++ b/sound/usb/quirks.c
@@ -196,19 +196,23 @@
 	 * future ones might change, so ensure that we fail silently if the
 	 * interface doesn't look exactly right.
 	 */
+	dev_info(&iface->dev, "checking PCM interface\n");

 	/* must have a non-zero altsetting for streaming */
 	if (iface->num_altsetting < 2)
 		return -ENODEV;
+	dev_info(&iface->dev, "altsets found\n");
 	alts = &iface->altsetting[1];
 	altsd = get_iface_desc(alts);

 	/* must have an isochronous endpoint for streaming */
 	if (altsd->bNumEndpoints < 1)
 		return -ENODEV;
+	dev_info(&iface->dev, "endpoint found\n");
 	epd = get_endpoint(alts, 0);
 	if (!usb_endpoint_xfer_isoc(epd))
 		return -ENODEV;
+	dev_info(&iface->dev, "iso found\n");

 	/* must have format descriptors */
 	ashd = snd_usb_find_csint_desc(alts->extra, alts->extralen, NULL,
@@ -219,6 +223,7 @@
 	    !fmtd || fmtd->bLength < 8)
 		return -ENODEV;

+	dev_info(&iface->dev, "descriptors found\n");
 	return create_standard_audio_quirk(chip, iface, driver, NULL);
 }