[PATCH 5.12 275/384] ALSA: usb-audio: Add dB range mapping for Sennheiser Communications Headset PC 8
From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Date: 2021-05-10 12:27:27
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From: Timo Gurr <redacted> commit ab2165e2e6ed17345ffa8ee88ca764e8788ebcd7 upstream. The decibel volume range contains a negative maximum value resulting in pipewire complaining about the device and effectivly having no sound output. The wrong values also resulted in the headset sounding muted already at a mixer level of about ~25%. PipeWire BugLink: https://gitlab.freedesktop.org/pipewire/pipewire/-/issues/1049 BugLink: https://bugzilla.kernel.org/show_bug.cgi?id=212897 Signed-off-by: Timo Gurr <redacted> Cc: <redacted> Link: https://lore.kernel.org/r/20210503110822.10222-1-tiwai@suse.de (local) Signed-off-by: Takashi Iwai <redacted> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> --- sound/usb/mixer_maps.c | 12 ++++++++++++ 1 file changed, 12 insertions(+)
--- a/sound/usb/mixer_maps.c
+++ b/sound/usb/mixer_maps.c@@ -337,6 +337,13 @@ static const struct usbmix_name_map bose { 0 } /* terminator */ }; +/* Sennheiser Communications Headset [PC 8], the dB value is reported as -6 negative maximum */ +static const struct usbmix_dB_map sennheiser_pc8_dB = {-9500, 0}; +static const struct usbmix_name_map sennheiser_pc8_map[] = { + { 9, NULL, .dB = &sennheiser_pc8_dB }, + { 0 } /* terminator */ +}; + /* * Dell usb dock with ALC4020 codec had a firmware problem where it got * screwed up when zero volume is passed; just skip it as a workaround
@@ -593,6 +600,11 @@ static const struct usbmix_ctl_map usbmi .id = USB_ID(0x17aa, 0x1046), .map = lenovo_p620_rear_map, }, + { + /* Sennheiser Communications Headset [PC 8] */ + .id = USB_ID(0x1395, 0x0025), + .map = sennheiser_pc8_map, + }, { 0 } /* terminator */ };