v4.19.13 snapshot.
diff --git a/include/sound/control.h b/include/sound/control.h
new file mode 100644
index 0000000..6011a58
--- /dev/null
+++ b/include/sound/control.h
@@ -0,0 +1,268 @@
+#ifndef __SOUND_CONTROL_H
+#define __SOUND_CONTROL_H
+
+/*
+ * Header file for control interface
+ * Copyright (c) by Jaroslav Kysela <perex@perex.cz>
+ *
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ *
+ */
+
+#include <linux/wait.h>
+#include <linux/nospec.h>
+#include <sound/asound.h>
+
+#define snd_kcontrol_chip(kcontrol) ((kcontrol)->private_data)
+
+struct snd_kcontrol;
+typedef int (snd_kcontrol_info_t) (struct snd_kcontrol * kcontrol, struct snd_ctl_elem_info * uinfo);
+typedef int (snd_kcontrol_get_t) (struct snd_kcontrol * kcontrol, struct snd_ctl_elem_value * ucontrol);
+typedef int (snd_kcontrol_put_t) (struct snd_kcontrol * kcontrol, struct snd_ctl_elem_value * ucontrol);
+typedef int (snd_kcontrol_tlv_rw_t)(struct snd_kcontrol *kcontrol,
+ int op_flag, /* SNDRV_CTL_TLV_OP_XXX */
+ unsigned int size,
+ unsigned int __user *tlv);
+
+enum {
+ SNDRV_CTL_TLV_OP_READ = 0,
+ SNDRV_CTL_TLV_OP_WRITE = 1,
+ SNDRV_CTL_TLV_OP_CMD = -1,
+};
+
+struct snd_kcontrol_new {
+ snd_ctl_elem_iface_t iface; /* interface identifier */
+ unsigned int device; /* device/client number */
+ unsigned int subdevice; /* subdevice (substream) number */
+ const unsigned char *name; /* ASCII name of item */
+ unsigned int index; /* index of item */
+ unsigned int access; /* access rights */
+ unsigned int count; /* count of same elements */
+ snd_kcontrol_info_t *info;
+ snd_kcontrol_get_t *get;
+ snd_kcontrol_put_t *put;
+ union {
+ snd_kcontrol_tlv_rw_t *c;
+ const unsigned int *p;
+ } tlv;
+ unsigned long private_value;
+};
+
+struct snd_kcontrol_volatile {
+ struct snd_ctl_file *owner; /* locked */
+ unsigned int access; /* access rights */
+};
+
+struct snd_kcontrol {
+ struct list_head list; /* list of controls */
+ struct snd_ctl_elem_id id;
+ unsigned int count; /* count of same elements */
+ snd_kcontrol_info_t *info;
+ snd_kcontrol_get_t *get;
+ snd_kcontrol_put_t *put;
+ union {
+ snd_kcontrol_tlv_rw_t *c;
+ const unsigned int *p;
+ } tlv;
+ unsigned long private_value;
+ void *private_data;
+ void (*private_free)(struct snd_kcontrol *kcontrol);
+ struct snd_kcontrol_volatile vd[0]; /* volatile data */
+};
+
+#define snd_kcontrol(n) list_entry(n, struct snd_kcontrol, list)
+
+struct snd_kctl_event {
+ struct list_head list; /* list of events */
+ struct snd_ctl_elem_id id;
+ unsigned int mask;
+};
+
+#define snd_kctl_event(n) list_entry(n, struct snd_kctl_event, list)
+
+struct pid;
+
+enum {
+ SND_CTL_SUBDEV_PCM,
+ SND_CTL_SUBDEV_RAWMIDI,
+ SND_CTL_SUBDEV_ITEMS,
+};
+
+struct snd_ctl_file {
+ struct list_head list; /* list of all control files */
+ struct snd_card *card;
+ struct pid *pid;
+ int preferred_subdevice[SND_CTL_SUBDEV_ITEMS];
+ wait_queue_head_t change_sleep;
+ spinlock_t read_lock;
+ struct fasync_struct *fasync;
+ int subscribed; /* read interface is activated */
+ struct list_head events; /* waiting events for read */
+};
+
+#define snd_ctl_file(n) list_entry(n, struct snd_ctl_file, list)
+
+typedef int (*snd_kctl_ioctl_func_t) (struct snd_card * card,
+ struct snd_ctl_file * control,
+ unsigned int cmd, unsigned long arg);
+
+void snd_ctl_notify(struct snd_card * card, unsigned int mask, struct snd_ctl_elem_id * id);
+
+struct snd_kcontrol *snd_ctl_new1(const struct snd_kcontrol_new * kcontrolnew, void * private_data);
+void snd_ctl_free_one(struct snd_kcontrol * kcontrol);
+int snd_ctl_add(struct snd_card * card, struct snd_kcontrol * kcontrol);
+int snd_ctl_remove(struct snd_card * card, struct snd_kcontrol * kcontrol);
+int snd_ctl_replace(struct snd_card *card, struct snd_kcontrol *kcontrol, bool add_on_replace);
+int snd_ctl_remove_id(struct snd_card * card, struct snd_ctl_elem_id *id);
+int snd_ctl_rename_id(struct snd_card * card, struct snd_ctl_elem_id *src_id, struct snd_ctl_elem_id *dst_id);
+int snd_ctl_activate_id(struct snd_card *card, struct snd_ctl_elem_id *id,
+ int active);
+struct snd_kcontrol *snd_ctl_find_numid(struct snd_card * card, unsigned int numid);
+struct snd_kcontrol *snd_ctl_find_id(struct snd_card * card, struct snd_ctl_elem_id *id);
+
+int snd_ctl_create(struct snd_card *card);
+
+int snd_ctl_register_ioctl(snd_kctl_ioctl_func_t fcn);
+int snd_ctl_unregister_ioctl(snd_kctl_ioctl_func_t fcn);
+#ifdef CONFIG_COMPAT
+int snd_ctl_register_ioctl_compat(snd_kctl_ioctl_func_t fcn);
+int snd_ctl_unregister_ioctl_compat(snd_kctl_ioctl_func_t fcn);
+#else
+#define snd_ctl_register_ioctl_compat(fcn)
+#define snd_ctl_unregister_ioctl_compat(fcn)
+#endif
+
+int snd_ctl_get_preferred_subdevice(struct snd_card *card, int type);
+
+static inline unsigned int snd_ctl_get_ioffnum(struct snd_kcontrol *kctl, struct snd_ctl_elem_id *id)
+{
+ unsigned int ioff = id->numid - kctl->id.numid;
+ return array_index_nospec(ioff, kctl->count);
+}
+
+static inline unsigned int snd_ctl_get_ioffidx(struct snd_kcontrol *kctl, struct snd_ctl_elem_id *id)
+{
+ unsigned int ioff = id->index - kctl->id.index;
+ return array_index_nospec(ioff, kctl->count);
+}
+
+static inline unsigned int snd_ctl_get_ioff(struct snd_kcontrol *kctl, struct snd_ctl_elem_id *id)
+{
+ if (id->numid) {
+ return snd_ctl_get_ioffnum(kctl, id);
+ } else {
+ return snd_ctl_get_ioffidx(kctl, id);
+ }
+}
+
+static inline struct snd_ctl_elem_id *snd_ctl_build_ioff(struct snd_ctl_elem_id *dst_id,
+ struct snd_kcontrol *src_kctl,
+ unsigned int offset)
+{
+ *dst_id = src_kctl->id;
+ dst_id->index += offset;
+ dst_id->numid += offset;
+ return dst_id;
+}
+
+/*
+ * Frequently used control callbacks/helpers
+ */
+int snd_ctl_boolean_mono_info(struct snd_kcontrol *kcontrol,
+ struct snd_ctl_elem_info *uinfo);
+int snd_ctl_boolean_stereo_info(struct snd_kcontrol *kcontrol,
+ struct snd_ctl_elem_info *uinfo);
+int snd_ctl_enum_info(struct snd_ctl_elem_info *info, unsigned int channels,
+ unsigned int items, const char *const names[]);
+
+/*
+ * virtual master control
+ */
+struct snd_kcontrol *snd_ctl_make_virtual_master(char *name,
+ const unsigned int *tlv);
+int _snd_ctl_add_slave(struct snd_kcontrol *master, struct snd_kcontrol *slave,
+ unsigned int flags);
+/* optional flags for slave */
+#define SND_CTL_SLAVE_NEED_UPDATE (1 << 0)
+
+/**
+ * snd_ctl_add_slave - Add a virtual slave control
+ * @master: vmaster element
+ * @slave: slave element to add
+ *
+ * Add a virtual slave control to the given master element created via
+ * snd_ctl_create_virtual_master() beforehand.
+ *
+ * All slaves must be the same type (returning the same information
+ * via info callback). The function doesn't check it, so it's your
+ * responsibility.
+ *
+ * Also, some additional limitations:
+ * at most two channels,
+ * logarithmic volume control (dB level) thus no linear volume,
+ * master can only attenuate the volume without gain
+ *
+ * Return: Zero if successful or a negative error code.
+ */
+static inline int
+snd_ctl_add_slave(struct snd_kcontrol *master, struct snd_kcontrol *slave)
+{
+ return _snd_ctl_add_slave(master, slave, 0);
+}
+
+/**
+ * snd_ctl_add_slave_uncached - Add a virtual slave control
+ * @master: vmaster element
+ * @slave: slave element to add
+ *
+ * Add a virtual slave control to the given master.
+ * Unlike snd_ctl_add_slave(), the element added via this function
+ * is supposed to have volatile values, and get callback is called
+ * at each time queried from the master.
+ *
+ * When the control peeks the hardware values directly and the value
+ * can be changed by other means than the put callback of the element,
+ * this function should be used to keep the value always up-to-date.
+ *
+ * Return: Zero if successful or a negative error code.
+ */
+static inline int
+snd_ctl_add_slave_uncached(struct snd_kcontrol *master,
+ struct snd_kcontrol *slave)
+{
+ return _snd_ctl_add_slave(master, slave, SND_CTL_SLAVE_NEED_UPDATE);
+}
+
+int snd_ctl_add_vmaster_hook(struct snd_kcontrol *kctl,
+ void (*hook)(void *private_data, int),
+ void *private_data);
+void snd_ctl_sync_vmaster(struct snd_kcontrol *kctl, bool hook_only);
+#define snd_ctl_sync_vmaster_hook(kctl) snd_ctl_sync_vmaster(kctl, true)
+int snd_ctl_apply_vmaster_slaves(struct snd_kcontrol *kctl,
+ int (*func)(struct snd_kcontrol *vslave,
+ struct snd_kcontrol *slave,
+ void *arg),
+ void *arg);
+
+/*
+ * Helper functions for jack-detection controls
+ */
+struct snd_kcontrol *
+snd_kctl_jack_new(const char *name, struct snd_card *card);
+void snd_kctl_jack_report(struct snd_card *card,
+ struct snd_kcontrol *kctl, bool status);
+
+#endif /* __SOUND_CONTROL_H */