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0f174b3525
C-Media devices (at least some models) mute the playback stream when volumes are set to the minimum value. But this isn't informed via TLV and the user-space, typically PulseAudio, gets confused as if it's still played in a low volume. This patch adds the new flag, min_mute, to struct usb_mixer_elem_info for indicating that the mixer element is with the minimum-mute volume. This flag is set for known C-Media devices in snd_usb_mixer_fu_apply_quirk() in turn. Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=196669 Cc: <stable@vger.kernel.org> Signed-off-by: Takashi Iwai <tiwai@suse.de>
104 lines
2.9 KiB
C
104 lines
2.9 KiB
C
#ifndef __USBMIXER_H
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#define __USBMIXER_H
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#include <sound/info.h>
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struct usb_mixer_interface {
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struct snd_usb_audio *chip;
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struct usb_host_interface *hostif;
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struct list_head list;
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unsigned int ignore_ctl_error;
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struct urb *urb;
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/* array[MAX_ID_ELEMS], indexed by unit id */
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struct usb_mixer_elem_list **id_elems;
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/* the usb audio specification version this interface complies to */
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int protocol;
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/* Sound Blaster remote control stuff */
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const struct rc_config *rc_cfg;
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u32 rc_code;
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wait_queue_head_t rc_waitq;
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struct urb *rc_urb;
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struct usb_ctrlrequest *rc_setup_packet;
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u8 rc_buffer[6];
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};
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#define MAX_CHANNELS 16 /* max logical channels */
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enum {
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USB_MIXER_BOOLEAN,
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USB_MIXER_INV_BOOLEAN,
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USB_MIXER_S8,
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USB_MIXER_U8,
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USB_MIXER_S16,
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USB_MIXER_U16,
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USB_MIXER_S32,
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USB_MIXER_U32,
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};
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typedef void (*usb_mixer_elem_dump_func_t)(struct snd_info_buffer *buffer,
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struct usb_mixer_elem_list *list);
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typedef int (*usb_mixer_elem_resume_func_t)(struct usb_mixer_elem_list *elem);
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struct usb_mixer_elem_list {
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struct usb_mixer_interface *mixer;
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struct usb_mixer_elem_list *next_id_elem; /* list of controls with same id */
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struct snd_kcontrol *kctl;
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unsigned int id;
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usb_mixer_elem_dump_func_t dump;
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usb_mixer_elem_resume_func_t resume;
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};
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struct usb_mixer_elem_info {
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struct usb_mixer_elem_list head;
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unsigned int control; /* CS or ICN (high byte) */
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unsigned int cmask; /* channel mask bitmap: 0 = master */
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unsigned int idx_off; /* Control index offset */
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unsigned int ch_readonly;
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unsigned int master_readonly;
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int channels;
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int val_type;
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int min, max, res;
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int dBmin, dBmax;
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int cached;
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int cache_val[MAX_CHANNELS];
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u8 initialized;
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u8 min_mute;
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void *private_data;
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};
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int snd_usb_create_mixer(struct snd_usb_audio *chip, int ctrlif,
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int ignore_error);
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void snd_usb_mixer_disconnect(struct usb_mixer_interface *mixer);
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void snd_usb_mixer_notify_id(struct usb_mixer_interface *mixer, int unitid);
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int snd_usb_mixer_set_ctl_value(struct usb_mixer_elem_info *cval,
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int request, int validx, int value_set);
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int snd_usb_mixer_add_control(struct usb_mixer_elem_list *list,
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struct snd_kcontrol *kctl);
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void snd_usb_mixer_elem_init_std(struct usb_mixer_elem_list *list,
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struct usb_mixer_interface *mixer,
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int unitid);
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int snd_usb_mixer_vol_tlv(struct snd_kcontrol *kcontrol, int op_flag,
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unsigned int size, unsigned int __user *_tlv);
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#ifdef CONFIG_PM
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int snd_usb_mixer_suspend(struct usb_mixer_interface *mixer);
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int snd_usb_mixer_resume(struct usb_mixer_interface *mixer, bool reset_resume);
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#endif
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int snd_usb_set_cur_mix_value(struct usb_mixer_elem_info *cval, int channel,
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int index, int value);
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int snd_usb_get_cur_mix_value(struct usb_mixer_elem_info *cval,
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int channel, int index, int *value);
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extern void snd_usb_mixer_elem_free(struct snd_kcontrol *kctl);
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#endif /* __USBMIXER_H */
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