linux-stable/sound/usb/power.h
Takashi Iwai 86a9bb5bf9 ALSA: usb-audio: Drop CONFIG_PM ifdefs
Practically seen, CONFIG_PM is almost mandatory.
Let's drop the ugly ifdef lines and simplify the code.

Link: https://lore.kernel.org/r/20211202084053.18201-1-tiwai@suse.de
Signed-off-by: Takashi Iwai <tiwai@suse.de>
2021-12-06 10:19:40 +01:00

27 lines
743 B
C

/* SPDX-License-Identifier: GPL-2.0 */
#ifndef __USBAUDIO_POWER_H
#define __USBAUDIO_POWER_H
struct snd_usb_power_domain {
int pd_id; /* UAC3 Power Domain ID */
int pd_d1d0_rec; /* D1 to D0 recovery time */
int pd_d2d0_rec; /* D2 to D0 recovery time */
};
enum {
UAC3_PD_STATE_D0,
UAC3_PD_STATE_D1,
UAC3_PD_STATE_D2,
};
int snd_usb_power_domain_set(struct snd_usb_audio *chip,
struct snd_usb_power_domain *pd,
unsigned char state);
struct snd_usb_power_domain *
snd_usb_find_power_domain(struct usb_host_interface *ctrl_iface,
unsigned char id);
int snd_usb_autoresume(struct snd_usb_audio *chip);
void snd_usb_autosuspend(struct snd_usb_audio *chip);
#endif /* __USBAUDIO_POWER_H */