This is a note to let you know that I've just added the patch titled
ALSA: usb-audio: Add a quirck for B&W PX headphones
to the 4.4-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
alsa-usb-audio-add-a-quirck-for-b-w-px-headphones.patch
and it can be found in the queue-4.4 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 240a8af929c7c57dcde28682725b29cf8474e8e5 Mon Sep 17 00:00:00 2001
From: Erik Veijola <erik.veijola@xxxxxxxxx>
Date: Fri, 23 Feb 2018 14:06:52 +0200
Subject: ALSA: usb-audio: Add a quirck for B&W PX headphones
From: Erik Veijola <erik.veijola@xxxxxxxxx>
commit 240a8af929c7c57dcde28682725b29cf8474e8e5 upstream.
The capture interface doesn't work and the playback interface only
supports 48 kHz sampling rate even though it advertises more rates.
Signed-off-by: Erik Veijola <erik.veijola@xxxxxxxxx>
Cc: <stable@xxxxxxxxxxxxxxx>
Signed-off-by: Takashi Iwai <tiwai@xxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
sound/usb/quirks-table.h | 47 +++++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 47 insertions(+)
--- a/sound/usb/quirks-table.h
+++ b/sound/usb/quirks-table.h
@@ -3277,4 +3277,51 @@ AU0828_DEVICE(0x2040, 0x7270, "Hauppauge
}
},
+{
+ /*
+ * Bower's & Wilkins PX headphones only support the 48 kHz sample rate
+ * even though it advertises more. The capture interface doesn't work
+ * even on windows.
+ */
+ USB_DEVICE(0x19b5, 0x0021),
+ .driver_info = (unsigned long) &(const struct snd_usb_audio_quirk) {
+ .ifnum = QUIRK_ANY_INTERFACE,
+ .type = QUIRK_COMPOSITE,
+ .data = (const struct snd_usb_audio_quirk[]) {
+ {
+ .ifnum = 0,
+ .type = QUIRK_AUDIO_STANDARD_MIXER,
+ },
+ /* Capture */
+ {
+ .ifnum = 1,
+ .type = QUIRK_IGNORE_INTERFACE,
+ },
+ /* Playback */
+ {
+ .ifnum = 2,
+ .type = QUIRK_AUDIO_FIXED_ENDPOINT,
+ .data = &(const struct audioformat) {
+ .formats = SNDRV_PCM_FMTBIT_S16_LE,
+ .channels = 2,
+ .iface = 2,
+ .altsetting = 1,
+ .altset_idx = 1,
+ .attributes = UAC_EP_CS_ATTR_FILL_MAX |
+ UAC_EP_CS_ATTR_SAMPLE_RATE,
+ .endpoint = 0x03,
+ .ep_attr = USB_ENDPOINT_XFER_ISOC,
+ .rates = SNDRV_PCM_RATE_48000,
+ .rate_min = 48000,
+ .rate_max = 48000,
+ .nr_rates = 1,
+ .rate_table = (unsigned int[]) {
+ 48000
+ }
+ }
+ },
+ }
+ }
+},
+
#undef USB_DEVICE_VENDOR_SPEC
Patches currently in stable-queue which might be from erik.veijola@xxxxxxxxx are
queue-4.4/alsa-usb-audio-add-a-quirck-for-b-w-px-headphones.patch