linux-kernel - Re: [PATCH] sound: Add support for Creative BT-D1 via usb sound quirks

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Date:	Thu, 03 Jan 2013 12:59:07 +0100
From:	Alexander Schremmer <alex@...xanderweb.de>
To:	Takashi Iwai <tiwai@...e.de>
CC:	Jaroslav Kysela <perex@...ex.cz>, alsa-devel@...a-project.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] sound: Add support for Creative BT-D1 via usb sound quirks

On 03.01.2013 10:58, Takashi Iwai wrote:

> Thanks for the patch.  The changes look OK, but could you fix trivial
> coding issues reported by scripts/checkpatch.pl and resend?

Oops, my sending workflow ate the tabs, here it is again (hopefully now
working correctly):


From: Alexander Schremmer <alex@...xanderweb.de>

Support the Creative BT-D1 Bluetooth USB audio device. Before this
patch, Linux had trouble finding the correct USB descriptors and bailed
out with these messages:

 no or invalid class specific endpoint descriptor

Now it still prints these messages on hotplug:

 snd-usb-audio: probe of ...:1.0 failed with error -5
 snd-usb-audio: probe of ...:1.2 failed with error -5
 snd-usb-audio: probe of ...:1.3 failed with error -5

But the device works correctly, including the HID support.

The patch is diff'ed against 3.8-rc1 but should apply to older kernels
as well.

Signed-off-by: Alexander Schremmer <alex@...xanderweb.de>

---
diff -uprN linux-3.8-rc1/sound/usb/quirks-table.h
linux-3.8-rc1-mod/sound/usb/quirks-table.h
--- linux-3.8-rc1/sound/usb/quirks-table.h	2012-12-22 02:19:00.000000000
+0100
+++ linux-3.8-rc1-mod/sound/usb/quirks-table.h	2012-12-26
11:41:28.000000000 +0100
@@ -50,6 +50,28 @@
 	}
 },

+{
+	/* Creative BT-D1 */
+	USB_DEVICE(0x041e, 0x0005),
+	.driver_info = (unsigned long) &(const struct snd_usb_audio_quirk) {
+		.ifnum = 1,
+		.type = QUIRK_AUDIO_FIXED_ENDPOINT,
+		.data = &(const struct audioformat) {
+			.formats = SNDRV_PCM_FMTBIT_S16_LE,
+			.channels = 2,
+			.iface = 1,
+			.altsetting = 1,
+			.altset_idx = 1,
+			.endpoint = 0x03,
+			.ep_attr = USB_ENDPOINT_XFER_ISOC,
+			.attributes = 0,
+			.rates = SNDRV_PCM_RATE_CONTINUOUS,
+			.rate_min = 48000,
+			.rate_max = 48000,
+		}
+	}
+},
+
 /* Creative/Toshiba Multimedia Center SB-0500 */
 {
 	USB_DEVICE(0x041e, 0x3048),

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