Commit c369c8db authored Oct 04, 2018 by Nicolas Huaman Committed by Takashi Iwai Oct 04, 2018

ALSA: usb-audio: update quirk for B&W PX to remove microphone

A quirk in snd-usb-audio was added to automate setting sample rate to
4800k and remove the previously exposed nonfunctional microphone for
the Bowers & Wilkins PX:
commit 240a8af9
https://lore.kernel.org/patchwork/patch/919689/



However the headphones where updated shortly after that to remove the
unintentional microphone functionality. I guess because of this the
headphones now crash when connecting them via USB while the quirk is
active. Dmesg:

snd-usb-audio: probe of 2-3:1.0 failed with error -22
usb 2-3: 2:1: cannot get min/max values for control 2 (id 2)

This patch removes the microfone and allows the headphones to connect
and work out of the box. It is based on the current mainline kernel
 and successfully applied an tested on my machine (4.18.10.arch1-1).

Fixes: 240a8af9 ("ALSA: usb-audio: Add a quirck for B&W PX headphones")
Signed-off-by: Nicolas Huaman <nicolas@herochao.de>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

parent d153135e

sound/usb/quirks-table.h

+2 −7

Original line number	Diff line number	Diff line
		@@ -3346,19 +3346,14 @@ AU0828_DEVICE(0x2040, 0x7270, "Hauppauge", "HVR-950Q"),
		.ifnum = 0,
		.type = QUIRK_AUDIO_STANDARD_MIXER,
		},
		/* Capture */
		{
		.ifnum = 1,
		.type = QUIRK_IGNORE_INTERFACE,
		},
		/* Playback */
		{
		.ifnum = 2,
		.ifnum = 1,
		.type = QUIRK_AUDIO_FIXED_ENDPOINT,
		.data = &(const struct audioformat) {
		.formats = SNDRV_PCM_FMTBIT_S16_LE,
		.channels = 2,
		.iface = 2,
		.iface = 1,
		.altsetting = 1,
		.altset_idx = 1,
		.attributes = UAC_EP_CS_ATTR_FILL_MAX \|

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