linux/sound/usb/quirks.h
Takashi Iwai cab941b7e5 ALSA: usb-audio: Constify audioformat pointer references
The audioformat is referred in many places but most of usages are
read-only.  Let's add const prefix in the possible places.

Tested-by: Keith Milner <kamilner@superlative.org>
Tested-by: Dylan Robinson <dylan_robinson@motu.com>
Link: https://lore.kernel.org/r/20201123085347.19667-28-tiwai@suse.de
Signed-off-by: Takashi Iwai <tiwai@suse.de>
2020-11-23 15:15:36 +01:00

57 lines
1.7 KiB
C

/* SPDX-License-Identifier: GPL-2.0 */
#ifndef __USBAUDIO_QUIRKS_H
#define __USBAUDIO_QUIRKS_H
struct audioformat;
struct snd_usb_endpoint;
struct snd_usb_substream;
int snd_usb_create_quirk(struct snd_usb_audio *chip,
struct usb_interface *iface,
struct usb_driver *driver,
const struct snd_usb_audio_quirk *quirk);
int snd_usb_apply_interface_quirk(struct snd_usb_audio *chip,
int iface,
int altno);
int snd_usb_apply_boot_quirk(struct usb_device *dev,
struct usb_interface *intf,
const struct snd_usb_audio_quirk *quirk,
unsigned int usb_id);
int snd_usb_apply_boot_quirk_once(struct usb_device *dev,
struct usb_interface *intf,
const struct snd_usb_audio_quirk *quirk,
unsigned int usb_id);
void snd_usb_set_format_quirk(struct snd_usb_substream *subs,
const struct audioformat *fmt);
bool snd_usb_get_sample_rate_quirk(struct snd_usb_audio *chip);
int snd_usb_is_big_endian_format(struct snd_usb_audio *chip,
const struct audioformat *fp);
void snd_usb_endpoint_start_quirk(struct snd_usb_endpoint *ep);
void snd_usb_set_interface_quirk(struct snd_usb_audio *chip);
void snd_usb_ctl_msg_quirk(struct usb_device *dev, unsigned int pipe,
__u8 request, __u8 requesttype, __u16 value,
__u16 index, void *data, __u16 size);
int snd_usb_select_mode_quirk(struct snd_usb_audio *chip,
const struct audioformat *fmt);
u64 snd_usb_interface_dsd_format_quirks(struct snd_usb_audio *chip,
struct audioformat *fp,
unsigned int sample_bytes);
void snd_usb_audioformat_attributes_quirk(struct snd_usb_audio *chip,
struct audioformat *fp,
int stream);
bool snd_usb_registration_quirk(struct snd_usb_audio *chip, int iface);
#endif /* __USBAUDIO_QUIRKS_H */