linux/sound/usb/clock.h
Alexander Tsoy 9f35a31283 ALSA: usb-audio: Add clock validity quirk for Denon MC7000/MCX8000
It should be safe to ignore clock validity check result if the following
conditions are met:
 - only one single sample rate is supported;
 - the terminal is directly connected to the clock source;
 - the clock type is internal.

This is to deal with some Denon DJ controllers that always reports that
clock is invalid.

Tested-by: Tobias Oszlanyi <toszlanyi@yahoo.de>
Signed-off-by: Alexander Tsoy <alexander@tsoy.me>
Cc: <stable@vger.kernel.org>
Link: https://lore.kernel.org/r/20200212235450.697348-1-alexander@tsoy.me
Signed-off-by: Takashi Iwai <tiwai@suse.de>
2020-02-13 07:18:58 +01:00

13 lines
389 B
C

/* SPDX-License-Identifier: GPL-2.0 */
#ifndef __USBAUDIO_CLOCK_H
#define __USBAUDIO_CLOCK_H
int snd_usb_init_sample_rate(struct snd_usb_audio *chip, int iface,
struct usb_host_interface *alts,
struct audioformat *fmt, int rate);
int snd_usb_clock_find_source(struct snd_usb_audio *chip,
struct audioformat *fmt, bool validate);
#endif /* __USBAUDIO_CLOCK_H */