path: root/sound
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authorEric Wong <normalperson@yhbt.net>2015-03-31 07:34:05 +0000
committerTakashi Iwai <tiwai@suse.de>2015-04-04 14:07:56 +0200
commit9fc88ad6fd86ff6ce979105c633c58cc3980129c (patch)
treebfb92891d91015646d7654be36f41d1faa313105 /sound
parent7081adf3f98f4c39dc6758208775b2aa48f51f8a (diff)
ALSA: usb-audio: don't try to get Benchmark DAC1 sample rate
Adding this quirk allows us to avoid the noisy "cannot get freq at ep 0x1" message in dmesg output every time playback starts. This ought to affect other Benchmark DAC1 variations using the same "Microchip Technology, Inc." chip as well, but I have only tested with the "Pre" variant. Signed-off-by: Eric Wong <normalperson@yhbt.net> Cc: Joe Turner <joe@oampo.co.uk> Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'sound')
1 files changed, 7 insertions, 2 deletions
diff --git a/sound/usb/quirks.c b/sound/usb/quirks.c
index 753a47de8459..9a28365126f9 100644
--- a/sound/usb/quirks.c
+++ b/sound/usb/quirks.c
@@ -1113,8 +1113,13 @@ void snd_usb_set_format_quirk(struct snd_usb_substream *subs,
bool snd_usb_get_sample_rate_quirk(struct snd_usb_audio *chip)
- /* MS Lifecam HD-5000 doesn't support reading the sample rate. */
- return chip->usb_id == USB_ID(0x045E, 0x076D);
+ /* devices which do not support reading the sample rate. */
+ switch (chip->usb_id) {
+ case USB_ID(0x045E, 0x076D): /* MS Lifecam HD-5000 */
+ case USB_ID(0x04D8, 0xFEEA): /* Benchmark DAC1 Pre */
+ return true;
+ }
+ return false;
/* Marantz/Denon USB DACs need a vendor cmd to switch