From 55f7326170d9e83e2d828591938e1101982a679c Mon Sep 17 00:00:00 2001 From: Chris Wulff Date: Sat, 14 Mar 2020 12:54:49 -0400 Subject: ALSA: usb-audio: Create a registration quirk for Kingston HyperX Amp (0951:16d8) Create a quirk that allows special processing and/or skipping the call to snd_card_register. For HyperX AMP, which uses two interfaces, but only has a capture stream in the second, this allows the capture stream to merge with the first PCM. Signed-off-by: Chris Wulff Link: https://lore.kernel.org/r/20200314165449.4086-3-crwulff@gmail.com Signed-off-by: Takashi Iwai --- sound/usb/quirks.c | 14 ++++++++++++++ 1 file changed, 14 insertions(+) (limited to 'sound/usb/quirks.c') diff --git a/sound/usb/quirks.c b/sound/usb/quirks.c index 3cc745fe24d8..d605aff801b8 100644 --- a/sound/usb/quirks.c +++ b/sound/usb/quirks.c @@ -1808,3 +1808,17 @@ void snd_usb_audioformat_attributes_quirk(struct snd_usb_audio *chip, break; } } + +int snd_usb_registration_quirk(struct snd_usb_audio *chip, + int iface) +{ + switch (chip->usb_id) { + case USB_ID(0x0951, 0x16d8): /* Kingston HyperX AMP */ + /* Register only when we reach interface 2 so that streams can + * merge correctly into PCMs from interface 0 + */ + return (iface != 2); + } + /* Register as normal */ + return 0; +} -- cgit v1.2.3