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authorAlexander Tsoy <alexander@tsoy.me>2020-01-15 18:13:58 +0300
committerTakashi Iwai <tiwai@suse.de>2020-01-16 10:45:24 +0100
commitc249177944b650816069f6c49b769baaa94339dc (patch)
treefbc98cfcf5605d830a52446261bdad462abec6c1 /sound/usb
parenta3afa29942b84b4e2548beacccc3a68b8d77e3dc (diff)
downloadlinux-c249177944b650816069f6c49b769baaa94339dc.tar.bz2
ALSA: usb-audio: add implicit fb quirk for MOTU M Series
This fixes crackling sound during playback. Further note: MOTU is known for reusing Product IDs for different devices or different generations of the device (e.g. MicroBook I/II/IIc shares a single Product ID). This patch was only tested with M4 audio interface, but the same Product ID is also used by M2. Hope it will work for M2 as well. Signed-off-by: Alexander Tsoy <alexander@tsoy.me> Link: https://lore.kernel.org/r/20200115151358.56672-1-alexander@tsoy.me Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'sound/usb')
-rw-r--r--sound/usb/pcm.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/sound/usb/pcm.c b/sound/usb/pcm.c
index 2f6a80ca36fc..5844a0c9d0db 100644
--- a/sound/usb/pcm.c
+++ b/sound/usb/pcm.c
@@ -361,6 +361,10 @@ static int set_sync_ep_implicit_fb_quirk(struct snd_usb_substream *subs,
ep = 0x84;
ifnum = 0;
goto add_sync_ep_from_ifnum;
+ case USB_ID(0x07fd, 0x0008): /* MOTU M Series */
+ ep = 0x81;
+ ifnum = 2;
+ goto add_sync_ep_from_ifnum;
case USB_ID(0x0582, 0x01d8): /* BOSS Katana */
/* BOSS Katana amplifiers do not need quirks */
return 0;