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ALSA: usb - disable broken hw volume for Tenx TP6911 

While going through Ubuntu bugs, I discovered this patch being
posted and a confirmation that the patch works as expected.

Finding out how the hw volume really works would be preferrable
to just disabling the broken one, but this would be better than
nothing.

Credit: sndfnsdfin (qawsnews)
BugLink: https://bugs.launchpad.net/bugs/559939
Signed-off-by: David Henningsson <david.henningsson@canonical.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
hifive-unleashed-5.1
David Henningsson 2012-09-20 10:20:41 +02:00 committed by Takashi Iwai
parent c40bd914a8
commit c10514394e
1 changed files with 7 additions and 0 deletions
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7
sound/usb/mixer.c
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@ -1267,6 +1267,13 @@ static int parse_audio_feature_unit(struct mixer_build *state, int unitid, void
/* disable non-functional volume control */
master_bits &= ~UAC_CONTROL_BIT(UAC_FU_VOLUME);
break;
case USB_ID(0x1130, 0xf211):
snd_printk(KERN_INFO
"usbmixer: volume control quirk for Tenx TP6911 Audio Headset\n");
/* disable non-functional volume control */
channels = 0;
break;
}
if (channels > 0)
first_ch_bits = snd_usb_combine_bytes(bmaControls + csize, csize);