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Diffstat (limited to '')
| -rw-r--r-- | sound/usb/power.h | 37 |
1 files changed, 37 insertions, 0 deletions
diff --git a/sound/usb/power.h b/sound/usb/power.h new file mode 100644 index 000000000..6004231a7 --- /dev/null +++ b/sound/usb/power.h @@ -0,0 +1,37 @@ +/* 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); + +#ifdef CONFIG_PM +int snd_usb_autoresume(struct snd_usb_audio *chip); +void snd_usb_autosuspend(struct snd_usb_audio *chip); +#else +static inline int snd_usb_autoresume(struct snd_usb_audio *chip) +{ + return 0; +} +static inline void snd_usb_autosuspend(struct snd_usb_audio *chip) +{ +} +#endif + +#endif /* __USBAUDIO_POWER_H */ |