sound/usb/power.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 #ifndef __USBAUDIO_POWER_H
   3 #define __USBAUDIO_POWER_H
   4
   5 struct snd_usb_power_domain {
   6         int pd_id;              /* UAC3 Power Domain ID */
   7         int pd_d1d0_rec;        /* D1 to D0 recovery time */
   8         int pd_d2d0_rec;        /* D2 to D0 recovery time */
   9 };
  10
  11 enum {
  12         UAC3_PD_STATE_D0,
  13         UAC3_PD_STATE_D1,
  14         UAC3_PD_STATE_D2,
  15 };
  16
  17 int snd_usb_power_domain_set(struct snd_usb_audio *chip,
  18                              struct snd_usb_power_domain *pd,
  19                              unsigned char state);
  20 struct snd_usb_power_domain *
  21 snd_usb_find_power_domain(struct usb_host_interface *ctrl_iface,
  22                           unsigned char id);
  23
  24 #ifdef CONFIG_PM
  25 int snd_usb_autoresume(struct snd_usb_audio *chip);
  26 void snd_usb_autosuspend(struct snd_usb_audio *chip);
  27 #else
  28 static inline int snd_usb_autoresume(struct snd_usb_audio *chip)
  29 {
  30         return 0;
  31 }
  32 static inline void snd_usb_autosuspend(struct snd_usb_audio *chip)
  33 {
  34 }
  35 #endif
  36
  37 #endif /* __USBAUDIO_POWER_H */