ALSA: usb-audio: Add a quirck for B&W PX headphones

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@gmail.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

diff --git a/sound/usb/quirks-table.h b/sound/usb/quirks-table.h
index 50252046b01df7cdb376e1c8ae8c59559befdd1f..754e632a27bd2e8c15931e821fa158bf50bfdb78 100644 (file)
--- a/sound/usb/quirks-table.h
+++ b/sound/usb/quirks-table.h
@@ -3325,4 +3325,51 @@ AU0828_DEVICE(0x2040, 0x7270, "Hauppauge", "HVR-950Q"),
        }
 },
 
+{
+       /*
+        * 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