/*
 * Universal Interface for Intel High Definition Audio Codec
 *
 * Generic widget tree parser
 *
 * Copyright (c) 2004 Takashi Iwai <tiwai@suse.de>
 *
 *  This driver 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 driver 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/init.h>
#include <linux/slab.h>
#include <linux/export.h>
#include <linux/sort.h>
#include <linux/delay.h>
#include <linux/ctype.h>
#include <linux/string.h>
#include <linux/bitops.h>
#include <sound/core.h>
#include <sound/jack.h>
#include "hda_codec.h"
#include "hda_local.h"
#include "hda_auto_parser.h"
#include "hda_jack.h"
#include "hda_beep.h"
#include "hda_generic.h"


/* initialize hda_gen_spec struct */
int snd_hda_gen_spec_init(struct hda_gen_spec *spec)
{
        snd_array_init(&spec->kctls, sizeof(struct snd_kcontrol_new), 32);
        snd_array_init(&spec->paths, sizeof(struct nid_path), 8);
        snd_array_init(&spec->loopback_list, sizeof(struct hda_amp_list), 8);
        mutex_init(&spec->pcm_mutex);
        return 0;
}
EXPORT_SYMBOL_HDA(snd_hda_gen_spec_init);

struct snd_kcontrol_new *
snd_hda_gen_add_kctl(struct hda_gen_spec *spec, const char *name,
                     const struct snd_kcontrol_new *temp)
{
        struct snd_kcontrol_new *knew = snd_array_new(&spec->kctls);
        if (!knew)
                return NULL;
        *knew = *temp;
        if (name)
                knew->name = kstrdup(name, GFP_KERNEL);
        else if (knew->name)
                knew->name = kstrdup(knew->name, GFP_KERNEL);
        if (!knew->name)
                return NULL;
        return knew;
}
EXPORT_SYMBOL_HDA(snd_hda_gen_add_kctl);

static void free_kctls(struct hda_gen_spec *spec)
{
        if (spec->kctls.list) {
                struct snd_kcontrol_new *kctl = spec->kctls.list;
                int i;
                for (i = 0; i < spec->kctls.used; i++)
                        kfree(kctl[i].name);
        }
        snd_array_free(&spec->kctls);
}

void snd_hda_gen_spec_free(struct hda_gen_spec *spec)
{
        if (!spec)
                return;
        free_kctls(spec);
        snd_array_free(&spec->paths);
        snd_array_free(&spec->loopback_list);
}
EXPORT_SYMBOL_HDA(snd_hda_gen_spec_free);

/*
 * store user hints
 */
static void parse_user_hints(struct hda_codec *codec)
{
        struct hda_gen_spec *spec = codec->spec;
        int val;

        val = snd_hda_get_bool_hint(codec, "jack_detect");
        if (val >= 0)
                codec->no_jack_detect = !val;
        val = snd_hda_get_bool_hint(codec, "inv_jack_detect");
        if (val >= 0)
                codec->inv_jack_detect = !!val;
        val = snd_hda_get_bool_hint(codec, "trigger_sense");
        if (val >= 0)
                codec->no_trigger_sense = !val;
        val = snd_hda_get_bool_hint(codec, "inv_eapd");
        if (val >= 0)
                codec->inv_eapd = !!val;
        val = snd_hda_get_bool_hint(codec, "pcm_format_first");
        if (val >= 0)
                codec->pcm_format_first = !!val;
        val = snd_hda_get_bool_hint(codec, "sticky_stream");
        if (val >= 0)
                codec->no_sticky_stream = !val;
        val = snd_hda_get_bool_hint(codec, "spdif_status_reset");
        if (val >= 0)
                codec->spdif_status_reset = !!val;
        val = snd_hda_get_bool_hint(codec, "pin_amp_workaround");
        if (val >= 0)
                codec->pin_amp_workaround = !!val;
        val = snd_hda_get_bool_hint(codec, "single_adc_amp");
        if (val >= 0)
                codec->single_adc_amp = !!val;

        val = snd_hda_get_bool_hint(codec, "auto_mute");
        if (val >= 0)
                spec->suppress_auto_mute = !val;
        val = snd_hda_get_bool_hint(codec, "auto_mic");
        if (val >= 0)
                spec->suppress_auto_mic = !val;
        val = snd_hda_get_bool_hint(codec, "line_in_auto_switch");
        if (val >= 0)
                spec->line_in_auto_switch = !!val;
        val = snd_hda_get_bool_hint(codec, "auto_mute_via_amp");
        if (val >= 0)
                spec->auto_mute_via_amp = !!val;
        val = snd_hda_get_bool_hint(codec, "need_dac_fix");
        if (val >= 0)
                spec->need_dac_fix = !!val;
        val = snd_hda_get_bool_hint(codec, "primary_hp");
        if (val >= 0)
                spec->no_primary_hp = !val;
        val = snd_hda_get_bool_hint(codec, "multi_cap_vol");
        if (val >= 0)
                spec->multi_cap_vol = !!val;
        val = snd_hda_get_bool_hint(codec, "inv_dmic_split");
        if (val >= 0)
                spec->inv_dmic_split = !!val;
        val = snd_hda_get_bool_hint(codec, "indep_hp");
        if (val >= 0)
                spec->indep_hp = !!val;
        val = snd_hda_get_bool_hint(codec, "add_stereo_mix_input");
        if (val >= 0)
                spec->add_stereo_mix_input = !!val;
        /* the following two are just for compatibility */
        val = snd_hda_get_bool_hint(codec, "add_out_jack_modes");
        if (val >= 0)
                spec->add_jack_modes = !!val;
        val = snd_hda_get_bool_hint(codec, "add_in_jack_modes");
        if (val >= 0)
                spec->add_jack_modes = !!val;
        val = snd_hda_get_bool_hint(codec, "add_jack_modes");
        if (val >= 0)
                spec->add_jack_modes = !!val;
        val = snd_hda_get_bool_hint(codec, "power_down_unused");
        if (val >= 0)
                spec->power_down_unused = !!val;
        val = snd_hda_get_bool_hint(codec, "add_hp_mic");
        if (val >= 0)
                spec->hp_mic = !!val;
        val = snd_hda_get_bool_hint(codec, "hp_mic_detect");
        if (val >= 0)
                spec->suppress_hp_mic_detect = !val;

        if (!snd_hda_get_int_hint(codec, "mixer_nid", &val))
                spec->mixer_nid = val;
}

/*
 * pin control value accesses
 */

#define update_pin_ctl(codec, pin, val) \
        snd_hda_codec_update_cache(codec, pin, 0, \
                                   AC_VERB_SET_PIN_WIDGET_CONTROL, val)

/* restore the pinctl based on the cached value */
static inline void restore_pin_ctl(struct hda_codec *codec, hda_nid_t pin)
{
        update_pin_ctl(codec, pin, snd_hda_codec_get_pin_target(codec, pin));
}

/* set the pinctl target value and write it if requested */
static void set_pin_target(struct hda_codec *codec, hda_nid_t pin,
                           unsigned int val, bool do_write)
{
        if (!pin)
                return;
        val = snd_hda_correct_pin_ctl(codec, pin, val);
        snd_hda_codec_set_pin_target(codec, pin, val);
        if (do_write)
                update_pin_ctl(codec, pin, val);
}

/* set pinctl target values for all given pins */
static void set_pin_targets(struct hda_codec *codec, int num_pins,
                            hda_nid_t *pins, unsigned int val)
{
        int i;
        for (i = 0; i < num_pins; i++)
                set_pin_target(codec, pins[i], val, false);
}

/*
 * parsing paths
 */

/* return the position of NID in the list, or -1 if not found */
static int find_idx_in_nid_list(hda_nid_t nid, const hda_nid_t *list, int nums)
{
        int i;
        for (i = 0; i < nums; i++)
                if (list[i] == nid)
                        return i;
        return -1;
}

/* return true if the given NID is contained in the path */
static bool is_nid_contained(struct nid_path *path, hda_nid_t nid)
{
        return find_idx_in_nid_list(nid, path->path, path->depth) >= 0;
}

static struct nid_path *get_nid_path(struct hda_codec *codec,
                                     hda_nid_t from_nid, hda_nid_t to_nid,
                                     int anchor_nid)
{
        struct hda_gen_spec *spec = codec->spec;
        int i;

        for (i = 0; i < spec->paths.used; i++) {
                struct nid_path *path = snd_array_elem(&spec->paths, i);
                if (path->depth <= 0)
                        continue;
                if ((!from_nid || path->path[0] == from_nid) &&
                    (!to_nid || path->path[path->depth - 1] == to_nid)) {
                        if (!anchor_nid ||
                            (anchor_nid > 0 && is_nid_contained(path, anchor_nid)) ||
                            (anchor_nid < 0 && !is_nid_contained(path, anchor_nid)))
                                return path;
                }
        }
        return NULL;
}

/* get the path between the given NIDs;
 * passing 0 to either @pin or @dac behaves as a wildcard
 */
struct nid_path *snd_hda_get_nid_path(struct hda_codec *codec,
                                      hda_nid_t from_nid, hda_nid_t to_nid)
{
        return get_nid_path(codec, from_nid, to_nid, 0);
}
EXPORT_SYMBOL_HDA(snd_hda_get_nid_path);

/* get the index number corresponding to the path instance;
 * the index starts from 1, for easier checking the invalid value
 */
int snd_hda_get_path_idx(struct hda_codec *codec, struct nid_path *path)
{
        struct hda_gen_spec *spec = codec->spec;
        struct nid_path *array = spec->paths.list;
        ssize_t idx;

        if (!spec->paths.used)
                return 0;
        idx = path - array;
        if (idx < 0 || idx >= spec->paths.used)
                return 0;
        return idx + 1;
}
EXPORT_SYMBOL_HDA(snd_hda_get_path_idx);

/* get the path instance corresponding to the given index number */
struct nid_path *snd_hda_get_path_from_idx(struct hda_codec *codec, int idx)
{
        struct hda_gen_spec *spec = codec->spec;

        if (idx <= 0 || idx > spec->paths.used)
                return NULL;
        return snd_array_elem(&spec->paths, idx - 1);
}
EXPORT_SYMBOL_HDA(snd_hda_get_path_from_idx);

/* check whether the given DAC is already found in any existing paths */
static bool is_dac_already_used(struct hda_codec *codec, hda_nid_t nid)
{
        struct hda_gen_spec *spec = codec->spec;
        int i;

        for (i = 0; i < spec->paths.used; i++) {
                struct nid_path *path = snd_array_elem(&spec->paths, i);
                if (path->path[0] == nid)
                        return true;
        }
        return false;
}

/* check whether the given two widgets can be connected */
static bool is_reachable_path(struct hda_codec *codec,
                              hda_nid_t from_nid, hda_nid_t to_nid)
{
        if (!from_nid || !to_nid)
                return false;
        return snd_hda_get_conn_index(codec, to_nid, from_nid, true) >= 0;
}

/* nid, dir and idx */
#define AMP_VAL_COMPARE_MASK    (0xffff | (1U << 18) | (0x0f << 19))

/* check whether the given ctl is already assigned in any path elements */
static bool is_ctl_used(struct hda_codec *codec, unsigned int val, int type)
{
        struct hda_gen_spec *spec = codec->spec;
        int i;

        val &= AMP_VAL_COMPARE_MASK;
        for (i = 0; i < spec->paths.used; i++) {
                struct nid_path *path = snd_array_elem(&spec->paths, i);
                if ((path->ctls[type] & AMP_VAL_COMPARE_MASK) == val)
                        return true;
        }
        return false;
}

/* check whether a control with the given (nid, dir, idx) was assigned */
static bool is_ctl_associated(struct hda_codec *codec, hda_nid_t nid,
                              int dir, int idx, int type)
{
        unsigned int val = HDA_COMPOSE_AMP_VAL(nid, 3, idx, dir);
        return is_ctl_used(codec, val, type);
}

static void print_nid_path(const char *pfx, struct nid_path *path)
{
        char buf[40];
        int i;


        buf[0] = 0;
        for (i = 0; i < path->depth; i++) {
                char tmp[4];
                sprintf(tmp, ":%02x", path->path[i]);
                strlcat(buf, tmp, sizeof(buf));
        }
        snd_printdd("%s path: depth=%d %s\n", pfx, path->depth, buf);
}

/* called recursively */
static bool __parse_nid_path(struct hda_codec *codec,
                             hda_nid_t from_nid, hda_nid_t to_nid,
                             int anchor_nid, struct nid_path *path,
                             int depth)
{
        const hda_nid_t *conn;
        int i, nums;

        if (to_nid == anchor_nid)
                anchor_nid = 0; /* anchor passed */
        else if (to_nid == (hda_nid_t)(-anchor_nid))
                return false; /* hit the exclusive nid */

        nums = snd_hda_get_conn_list(codec, to_nid, &conn);
        for (i = 0; i < nums; i++) {
                if (conn[i] != from_nid) {
                        /* special case: when from_nid is 0,
                         * try to find an empty DAC
                         */
                        if (from_nid ||
                            get_wcaps_type(get_wcaps(codec, conn[i])) != AC_WID_AUD_OUT ||
                            is_dac_already_used(codec, conn[i]))
                                continue;
                }
                /* anchor is not requested or already passed? */
                if (anchor_nid <= 0)
                        goto found;
        }
        if (depth >= MAX_NID_PATH_DEPTH)
                return false;
        for (i = 0; i < nums; i++) {
                unsigned int type;
                type = get_wcaps_type(get_wcaps(codec, conn[i]));
                if (type == AC_WID_AUD_OUT || type == AC_WID_AUD_IN ||
                    type == AC_WID_PIN)
                        continue;
                if (__parse_nid_path(codec, from_nid, conn[i],
                                     anchor_nid, path, depth + 1))
                        goto found;
        }
        return false;

 found:
        path->path[path->depth] = conn[i];
        path->idx[path->depth + 1] = i;
        if (nums > 1 && get_wcaps_type(get_wcaps(codec, to_nid)) != AC_WID_AUD_MIX)
                path->multi[path->depth + 1] = 1;
        path->depth++;
        return true;
}

/* parse the widget path from the given nid to the target nid;
 * when @from_nid is 0, try to find an empty DAC;
 * when @anchor_nid is set to a positive value, only paths through the widget
 * with the given value are evaluated.
 * when @anchor_nid is set to a negative value, paths through the widget
 * with the negative of given value are excluded, only other paths are chosen.
 * when @anchor_nid is zero, no special handling about path selection.
 */
bool snd_hda_parse_nid_path(struct hda_codec *codec, hda_nid_t from_nid,
                            hda_nid_t to_nid, int anchor_nid,
                            struct nid_path *path)
{
        if (__parse_nid_path(codec, from_nid, to_nid, anchor_nid, path, 1)) {
                path->path[path->depth] = to_nid;
                path->depth++;
                return true;
        }
        return false;
}
EXPORT_SYMBOL_HDA(snd_hda_parse_nid_path);

/*
 * parse the path between the given NIDs and add to the path list.
 * if no valid path is found, return NULL
 */
struct nid_path *
snd_hda_add_new_path(struct hda_codec *codec, hda_nid_t from_nid,
                     hda_nid_t to_nid, int anchor_nid)
{
        struct hda_gen_spec *spec = codec->spec;
        struct nid_path *path;

        if (from_nid && to_nid && !is_reachable_path(codec, from_nid, to_nid))
                return NULL;

        /* check whether the path has been already added */
        path = get_nid_path(codec, from_nid, to_nid, anchor_nid);
        if (path)
                return path;

        path = snd_array_new(&spec->paths);
        if (!path)
                return NULL;
        memset(path, 0, sizeof(*path));
        if (snd_hda_parse_nid_path(codec, from_nid, to_nid, anchor_nid, path))
                return path;
        /* push back */
        spec->paths.used--;
        return NULL;
}
EXPORT_SYMBOL_HDA(snd_hda_add_new_path);

/* clear the given path as invalid so that it won't be picked up later */
static void invalidate_nid_path(struct hda_codec *codec, int idx)
{
        struct nid_path *path = snd_hda_get_path_from_idx(codec, idx);
        if (!path)
                return;
        memset(path, 0, sizeof(*path));
}

/* look for an empty DAC slot */
static hda_nid_t look_for_dac(struct hda_codec *codec, hda_nid_t pin,
                              bool is_digital)
{
        struct hda_gen_spec *spec = codec->spec;
        bool cap_digital;
        int i;

        for (i = 0; i < spec->num_all_dacs; i++) {
                hda_nid_t nid = spec->all_dacs[i];
                if (!nid || is_dac_already_used(codec, nid))
                        continue;
                cap_digital = !!(get_wcaps(codec, nid) & AC_WCAP_DIGITAL);
                if (is_digital != cap_digital)
                        continue;
                if (is_reachable_path(codec, nid, pin))
                        return nid;
        }
        return 0;
}

/* replace the channels in the composed amp value with the given number */
static unsigned int amp_val_replace_channels(unsigned int val, unsigned int chs)
{
        val &= ~(0x3U << 16);
        val |= chs << 16;
        return val;
}

/* check whether the widget has the given amp capability for the direction */
static bool check_amp_caps(struct hda_codec *codec, hda_nid_t nid,
                           int dir, unsigned int bits)
{
        if (!nid)
                return false;
        if (get_wcaps(codec, nid) & (1 << (dir + 1)))
                if (query_amp_caps(codec, nid, dir) & bits)
                        return true;
        return false;
}

static bool same_amp_caps(struct hda_codec *codec, hda_nid_t nid1,
                          hda_nid_t nid2, int dir)
{
        if (!(get_wcaps(codec, nid1) & (1 << (dir + 1))))
                return !(get_wcaps(codec, nid2) & (1 << (dir + 1)));
        return (query_amp_caps(codec, nid1, dir) ==
                query_amp_caps(codec, nid2, dir));
}

#define nid_has_mute(codec, nid, dir) \
        check_amp_caps(codec, nid, dir, (AC_AMPCAP_MUTE | AC_AMPCAP_MIN_MUTE))
#define nid_has_volume(codec, nid, dir) \
        check_amp_caps(codec, nid, dir, AC_AMPCAP_NUM_STEPS)

/* look for a widget suitable for assigning a mute switch in the path */
static hda_nid_t look_for_out_mute_nid(struct hda_codec *codec,
                                       struct nid_path *path)
{
        int i;

        for (i = path->depth - 1; i >= 0; i--) {
                if (nid_has_mute(codec, path->path[i], HDA_OUTPUT))
                        return path->path[i];
                if (i != path->depth - 1 && i != 0 &&
                    nid_has_mute(codec, path->path[i], HDA_INPUT))
                        return path->path[i];
        }
        return 0;
}

/* look for a widget suitable for assigning a volume ctl in the path */
static hda_nid_t look_for_out_vol_nid(struct hda_codec *codec,
                                      struct nid_path *path)
{
        int i;

        for (i = path->depth - 1; i >= 0; i--) {
                if (nid_has_volume(codec, path->path[i], HDA_OUTPUT))
                        return path->path[i];
        }
        return 0;
}

/*
 * path activation / deactivation
 */

/* can have the amp-in capability? */
static bool has_amp_in(struct hda_codec *codec, struct nid_path *path, int idx)
{
        hda_nid_t nid = path->path[idx];
        unsigned int caps = get_wcaps(codec, nid);
        unsigned int type = get_wcaps_type(caps);

        if (!(caps & AC_WCAP_IN_AMP))
                return false;
        if (type == AC_WID_PIN && idx > 0) /* only for input pins */
                return false;
        return true;
}

/* can have the amp-out capability? */
static bool has_amp_out(struct hda_codec *codec, struct nid_path *path, int idx)
{
        hda_nid_t nid = path->path[idx];
        unsigned int caps = get_wcaps(codec, nid);
        unsigned int type = get_wcaps_type(caps);

        if (!(caps & AC_WCAP_OUT_AMP))
                return false;
        if (type == AC_WID_PIN && !idx) /* only for output pins */
                return false;
        return true;
}

/* check whether the given (nid,dir,idx) is active */
static bool is_active_nid(struct hda_codec *codec, hda_nid_t nid,
                          unsigned int dir, unsigned int idx)
{
        struct hda_gen_spec *spec = codec->spec;
        int i, n;

        for (n = 0; n < spec->paths.used; n++) {
                struct nid_path *path = snd_array_elem(&spec->paths, n);
                if (!path->active)
                        continue;
                for (i = 0; i < path->depth; i++) {
                        if (path->path[i] == nid) {
                                if (dir == HDA_OUTPUT || path->idx[i] == idx)
                                        return true;
                                break;
                        }
                }
        }
        return false;
}

/* check whether the NID is referred by any active paths */
#define is_active_nid_for_any(codec, nid) \
        is_active_nid(codec, nid, HDA_OUTPUT, 0)

/* get the default amp value for the target state */
static int get_amp_val_to_activate(struct hda_codec *codec, hda_nid_t nid,
                                   int dir, unsigned int caps, bool enable)
{
        unsigned int val = 0;

        if (caps & AC_AMPCAP_NUM_STEPS) {
                /* set to 0dB */
                if (enable)
                        val = (caps & AC_AMPCAP_OFFSET) >> AC_AMPCAP_OFFSET_SHIFT;
        }
        if (caps & (AC_AMPCAP_MUTE | AC_AMPCAP_MIN_MUTE)) {
                if (!enable)
                        val |= HDA_AMP_MUTE;
        }
        return val;
}

/* initialize the amp value (only at the first time) */
static void init_amp(struct hda_codec *codec, hda_nid_t nid, int dir, int idx)
{
        unsigned int caps = query_amp_caps(codec, nid, dir);
        int val = get_amp_val_to_activate(codec, nid, dir, caps, false);
        snd_hda_codec_amp_init_stereo(codec, nid, dir, idx, 0xff, val);
}

/* calculate amp value mask we can modify;
 * if the given amp is controlled by mixers, don't touch it
 */
static unsigned int get_amp_mask_to_modify(struct hda_codec *codec,
                                           hda_nid_t nid, int dir, int idx,
                                           unsigned int caps)
{
        unsigned int mask = 0xff;

        if (caps & (AC_AMPCAP_MUTE | AC_AMPCAP_MIN_MUTE)) {
                if (is_ctl_associated(codec, nid, dir, idx, NID_PATH_MUTE_CTL))
                        mask &= ~0x80;
        }
        if (caps & AC_AMPCAP_NUM_STEPS) {
                if (is_ctl_associated(codec, nid, dir, idx, NID_PATH_VOL_CTL) ||
                    is_ctl_associated(codec, nid, dir, idx, NID_PATH_BOOST_CTL))
                        mask &= ~0x7f;
        }
        return mask;
}

static void activate_amp(struct hda_codec *codec, hda_nid_t nid, int dir,
                         int idx, int idx_to_check, bool enable)
{
        unsigned int caps;
        unsigned int mask, val;

        if (!enable && is_active_nid(codec, nid, dir, idx_to_check))
                return;

        caps = query_amp_caps(codec, nid, dir);
        val = get_amp_val_to_activate(codec, nid, dir, caps, enable);
        mask = get_amp_mask_to_modify(codec, nid, dir, idx_to_check, caps);
        if (!mask)
                return;

        val &= mask;
        snd_hda_codec_amp_stereo(codec, nid, dir, idx, mask, val);
}

static void activate_amp_out(struct hda_codec *codec, struct nid_path *path,
                             int i, bool enable)
{
        hda_nid_t nid = path->path[i];
        init_amp(codec, nid, HDA_OUTPUT, 0);
        activate_amp(codec, nid, HDA_OUTPUT, 0, 0, enable);
}

static void activate_amp_in(struct hda_codec *codec, struct nid_path *path,
                            int i, bool enable, bool add_aamix)
{
        struct hda_gen_spec *spec = codec->spec;
        const hda_nid_t *conn;
        int n, nums, idx;
        int type;
        hda_nid_t nid = path->path[i];

        nums = snd_hda_get_conn_list(codec, nid, &conn);
        type = get_wcaps_type(get_wcaps(codec, nid));
        if (type == AC_WID_PIN ||
            (type == AC_WID_AUD_IN && codec->single_adc_amp)) {
                nums = 1;
                idx = 0;
        } else
                idx = path->idx[i];

        for (n = 0; n < nums; n++)
                init_amp(codec, nid, HDA_INPUT, n);

        /* here is a little bit tricky in comparison with activate_amp_out();
         * when aa-mixer is available, we need to enable the path as well
         */
        for (n = 0; n < nums; n++) {
                if (n != idx && (!add_aamix || conn[n] != spec->mixer_merge_nid))
                        continue;
                activate_amp(codec, nid, HDA_INPUT, n, idx, enable);
        }
}

/* activate or deactivate the given path
 * if @add_aamix is set, enable the input from aa-mix NID as well (if any)
 */
void snd_hda_activate_path(struct hda_codec *codec, struct nid_path *path,
                           bool enable, bool add_aamix)
{
        struct hda_gen_spec *spec = codec->spec;
        int i;

        if (!enable)
                path->active = false;

        for (i = path->depth - 1; i >= 0; i--) {
                hda_nid_t nid = path->path[i];
                if (enable && spec->power_down_unused) {
                        /* make sure the widget is powered up */
                        if (!snd_hda_check_power_state(codec, nid, AC_PWRST_D0))
                                snd_hda_codec_write(codec, nid, 0,
                                                    AC_VERB_SET_POWER_STATE,
                                                    AC_PWRST_D0);
                }
                if (enable && path->multi[i])
                        snd_hda_codec_write_cache(codec, nid, 0,
                                            AC_VERB_SET_CONNECT_SEL,
                                            path->idx[i]);
                if (has_amp_in(codec, path, i))
                        activate_amp_in(codec, path, i, enable, add_aamix);
                if (has_amp_out(codec, path, i))
                        activate_amp_out(codec, path, i, enable);
        }

        if (enable)
                path->active = true;
}
EXPORT_SYMBOL_HDA(snd_hda_activate_path);

/* if the given path is inactive, put widgets into D3 (only if suitable) */
static void path_power_down_sync(struct hda_codec *codec, struct nid_path *path)
{
        struct hda_gen_spec *spec = codec->spec;
        bool changed = false;
        int i;

        if (!spec->power_down_unused || path->active)
                return;

        for (i = 0; i < path->depth; i++) {
                hda_nid_t nid = path->path[i];
                if (!snd_hda_check_power_state(codec, nid, AC_PWRST_D3) &&
                    !is_active_nid_for_any(codec, nid)) {
                        snd_hda_codec_write(codec, nid, 0,
                                            AC_VERB_SET_POWER_STATE,
                                            AC_PWRST_D3);
                        changed = true;
                }
        }

        if (changed) {
                msleep(10);
                snd_hda_codec_read(codec, path->path[0], 0,
                                   AC_VERB_GET_POWER_STATE, 0);
        }
}

/* turn on/off EAPD on the given pin */
static void set_pin_eapd(struct hda_codec *codec, hda_nid_t pin, bool enable)
{
        struct hda_gen_spec *spec = codec->spec;
        if (spec->own_eapd_ctl ||
            !(snd_hda_query_pin_caps(codec, pin) & AC_PINCAP_EAPD))
                return;
        if (codec->inv_eapd)
                enable = !enable;
        if (spec->keep_eapd_on && !enable)
                return;
        snd_hda_codec_update_cache(codec, pin, 0,
                                   AC_VERB_SET_EAPD_BTLENABLE,
                                   enable ? 0x02 : 0x00);
}

/* re-initialize the path specified by the given path index */
static void resume_path_from_idx(struct hda_codec *codec, int path_idx)
{
        struct nid_path *path = snd_hda_get_path_from_idx(codec, path_idx);
        if (path)
                snd_hda_activate_path(codec, path, path->active, false);
}


/*
 * Helper functions for creating mixer ctl elements
 */

static int hda_gen_mixer_mute_put(struct snd_kcontrol *kcontrol,
                                  struct snd_ctl_elem_value *ucontrol);

enum {
        HDA_CTL_WIDGET_VOL,
        HDA_CTL_WIDGET_MUTE,
        HDA_CTL_BIND_MUTE,
};
static const struct snd_kcontrol_new control_templates[] = {
        HDA_CODEC_VOLUME(NULL, 0, 0, 0),
        /* only the put callback is replaced for handling the special mute */
        {
                .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
                .subdevice = HDA_SUBDEV_AMP_FLAG,
                .info = snd_hda_mixer_amp_switch_info,
                .get = snd_hda_mixer_amp_switch_get,
                .put = hda_gen_mixer_mute_put, /* replaced */
                .private_value = HDA_COMPOSE_AMP_VAL(0, 3, 0, 0),
        },
        HDA_BIND_MUTE(NULL, 0, 0, 0),
};

/* add dynamic controls from template */
static struct snd_kcontrol_new *
add_control(struct hda_gen_spec *spec, int type, const char *name,
                       int cidx, unsigned long val)
{
        struct snd_kcontrol_new *knew;

        knew = snd_hda_gen_add_kctl(spec, name, &control_templates[type]);
        if (!knew)
                return NULL;
        knew->index = cidx;
        if (get_amp_nid_(val))
                knew->subdevice = HDA_SUBDEV_AMP_FLAG;
        knew->private_value = val;
        return knew;
}

static int add_control_with_pfx(struct hda_gen_spec *spec, int type,
                                const char *pfx, const char *dir,
                                const char *sfx, int cidx, unsigned long val)
{
        char name[SNDRV_CTL_ELEM_ID_NAME_MAXLEN];
        snprintf(name, sizeof(name), "%s %s %s", pfx, dir, sfx);
        if (!add_control(spec, type, name, cidx, val))
                return -ENOMEM;
        return 0;
}

#define add_pb_vol_ctrl(spec, type, pfx, val)                   \
        add_control_with_pfx(spec, type, pfx, "Playback", "Volume", 0, val)
#define add_pb_sw_ctrl(spec, type, pfx, val)                    \
        add_control_with_pfx(spec, type, pfx, "Playback", "Switch", 0, val)
#define __add_pb_vol_ctrl(spec, type, pfx, cidx, val)                   \
        add_control_with_pfx(spec, type, pfx, "Playback", "Volume", cidx, val)
#define __add_pb_sw_ctrl(spec, type, pfx, cidx, val)                    \
        add_control_with_pfx(spec, type, pfx, "Playback", "Switch", cidx, val)

static int add_vol_ctl(struct hda_codec *codec, const char *pfx, int cidx,
                       unsigned int chs, struct nid_path *path)
{
        unsigned int val;
        if (!path)
                return 0;
        val = path->ctls[NID_PATH_VOL_CTL];
        if (!val)
                return 0;
        val = amp_val_replace_channels(val, chs);
        return __add_pb_vol_ctrl(codec->spec, HDA_CTL_WIDGET_VOL, pfx, cidx, val);
}

/* return the channel bits suitable for the given path->ctls[] */
static int get_default_ch_nums(struct hda_codec *codec, struct nid_path *path,
                               int type)
{
        int chs = 1; /* mono (left only) */
        if (path) {
                hda_nid_t nid = get_amp_nid_(path->ctls[type]);
                if (nid && (get_wcaps(codec, nid) & AC_WCAP_STEREO))
                        chs = 3; /* stereo */
        }
        return chs;
}

static int add_stereo_vol(struct hda_codec *codec, const char *pfx, int cidx,
                          struct nid_path *path)
{
        int chs = get_default_ch_nums(codec, path, NID_PATH_VOL_CTL);
        return add_vol_ctl(codec, pfx, cidx, chs, path);
}

/* create a mute-switch for the given mixer widget;
 * if it has multiple sources (e.g. DAC and loopback), create a bind-mute
 */
static int add_sw_ctl(struct hda_codec *codec, const char *pfx, int cidx,
                      unsigned int chs, struct nid_path *path)
{
        unsigned int val;
        int type = HDA_CTL_WIDGET_MUTE;

        if (!path)
                return 0;
        val = path->ctls[NID_PATH_MUTE_CTL];
        if (!val)
                return 0;
        val = amp_val_replace_channels(val, chs);
        if (get_amp_direction_(val) == HDA_INPUT) {
                hda_nid_t nid = get_amp_nid_(val);
                int nums = snd_hda_get_num_conns(codec, nid);
                if (nums > 1) {
                        type = HDA_CTL_BIND_MUTE;
                        val |= nums << 19;
                }
        }
        return __add_pb_sw_ctrl(codec->spec, type, pfx, cidx, val);
}

static int add_stereo_sw(struct hda_codec *codec, const char *pfx,
                                  int cidx, struct nid_path *path)
{
        int chs = get_default_ch_nums(codec, path, NID_PATH_MUTE_CTL);
        return add_sw_ctl(codec, pfx, cidx, chs, path);
}

/* playback mute control with the software mute bit check */
static int hda_gen_mixer_mute_put(struct snd_kcontrol *kcontrol,
                                  struct snd_ctl_elem_value *ucontrol)
{
        struct hda_codec *codec = snd_kcontrol_chip(kcontrol);
        struct hda_gen_spec *spec = codec->spec;

        if (spec->auto_mute_via_amp) {
                hda_nid_t nid = get_amp_nid(kcontrol);
                bool enabled = !((spec->mute_bits >> nid) & 1);
                ucontrol->value.integer.value[0] &= enabled;
                ucontrol->value.integer.value[1] &= enabled;
        }

        return snd_hda_mixer_amp_switch_put(kcontrol, ucontrol);
}

/* any ctl assigned to the path with the given index? */
static bool path_has_mixer(struct hda_codec *codec, int path_idx, int ctl_type)
{
        struct nid_path *path = snd_hda_get_path_from_idx(codec, path_idx);
        return path && path->ctls[ctl_type];
}

static const char * const channel_name[4] = {
        "Front", "Surround", "CLFE", "Side"
};

/* give some appropriate ctl name prefix for the given line out channel */
static const char *get_line_out_pfx(struct hda_codec *codec, int ch,
                                    int *index, int ctl_type)
{
        struct hda_gen_spec *spec = codec->spec;
        struct auto_pin_cfg *cfg = &spec->autocfg;

        *index = 0;
        if (cfg->line_outs == 1 && !spec->multi_ios &&
            !cfg->hp_outs && !cfg->speaker_outs)
                return spec->vmaster_mute.hook ? "PCM" : "Master";

        /* if there is really a single DAC used in the whole output paths,
         * use it master (or "PCM" if a vmaster hook is present)
         */
        if (spec->multiout.num_dacs == 1 && !spec->mixer_nid &&
            !spec->multiout.hp_out_nid[0] && !spec->multiout.extra_out_nid[0])
                return spec->vmaster_mute.hook ? "PCM" : "Master";

        /* multi-io channels */
        if (ch >= cfg->line_outs)
                return channel_name[ch];

        switch (cfg->line_out_type) {
        case AUTO_PIN_SPEAKER_OUT:
                /* if the primary channel vol/mute is shared with HP volume,
                 * don't name it as Speaker
                 */
                if (!ch && cfg->hp_outs &&
                    !path_has_mixer(codec, spec->hp_paths[0], ctl_type))
                        break;
                if (cfg->line_outs == 1)
                        return "Speaker";
                if (cfg->line_outs == 2)

                        return ch ? "Bass Speaker" : "Speaker";
                break;
        case AUTO_PIN_HP_OUT:
                /* if the primary channel vol/mute is shared with spk volume,
                 * don't name it as Headphone
                 */
                if (!ch && cfg->speaker_outs &&
                    !path_has_mixer(codec, spec->speaker_paths[0], ctl_type))
                        break;
                /* for multi-io case, only the primary out */
                if (ch && spec->multi_ios)
                        break;
                *index = ch;
                return "Headphone";
        }

        /* for a single channel output, we don't have to name the channel */
        if (cfg->line_outs == 1 && !spec->multi_ios)
                return "PCM";

        if (ch >= ARRAY_SIZE(channel_name)) {
                snd_BUG();
                return "PCM";
        }

        return channel_name[ch];
}

/*
 * Parse output paths
 */

/* badness definition */
enum {
        /* No primary DAC is found for the main output */
        BAD_NO_PRIMARY_DAC = 0x10000,
        /* No DAC is found for the extra output */
        BAD_NO_DAC = 0x4000,
        /* No possible multi-ios */
        BAD_MULTI_IO = 0x120,
        /* No individual DAC for extra output */
        BAD_NO_EXTRA_DAC = 0x102,
        /* No individual DAC for extra surrounds */
        BAD_NO_EXTRA_SURR_DAC = 0x101,
        /* Primary DAC shared with main surrounds */
        BAD_SHARED_SURROUND = 0x100,
        /* No independent HP possible */
        BAD_NO_INDEP_HP = 0x10,
        /* Primary DAC shared with main CLFE */
        BAD_SHARED_CLFE = 0x10,
        /* Primary DAC shared with extra surrounds */
        BAD_SHARED_EXTRA_SURROUND = 0x10,
        /* Volume widget is shared */
        BAD_SHARED_VOL = 0x10,
};

/* look for widgets in the given path which are appropriate for
 * volume and mute controls, and assign the values to ctls[].
 *
 * When no appropriate widget is found in the path, the badness value
 * is incremented depending on the situation.  The function returns the
 * total badness for both volume and mute controls.
 */
static int assign_out_path_ctls(struct hda_codec *codec, struct nid_path *path)
{
        hda_nid_t nid;
        unsigned int val;
        int badness = 0;

        if (!path)
                return BAD_SHARED_VOL * 2;

        if (path->ctls[NID_PATH_VOL_CTL] ||
            path->ctls[NID_PATH_MUTE_CTL])
                return 0; /* already evaluated */

        nid = look_for_out_vol_nid(codec, path);
        if (nid) {
                val = HDA_COMPOSE_AMP_VAL(nid, 3, 0, HDA_OUTPUT);
                if (is_ctl_used(codec, val, NID_PATH_VOL_CTL))
                        badness += BAD_SHARED_VOL;
                else
                        path->ctls[NID_PATH_VOL_CTL] = val;
        } else
                badness += BAD_SHARED_VOL;
        nid = look_for_out_mute_nid(codec, path);
        if (nid) {
                unsigned int wid_type = get_wcaps_type(get_wcaps(codec, nid));
                if (wid_type == AC_WID_PIN || wid_type == AC_WID_AUD_OUT ||
                    nid_has_mute(codec, nid, HDA_OUTPUT))
                        val = HDA_COMPOSE_AMP_VAL(nid, 3, 0, HDA_OUTPUT);
                else
                        val = HDA_COMPOSE_AMP_VAL(nid, 3, 0, HDA_INPUT);
                if (is_ctl_used(codec, val, NID_PATH_MUTE_CTL))
                        badness += BAD_SHARED_VOL;
                else
                        path->ctls[NID_PATH_MUTE_CTL] = val;
        } else
                badness += BAD_SHARED_VOL;
        return badness;
}

const struct badness_table hda_main_out_badness = {
        .no_primary_dac = BAD_NO_PRIMARY_DAC,
        .no_dac = BAD_NO_DAC,
        .shared_primary = BAD_NO_PRIMARY_DAC,
        .shared_surr = BAD_SHARED_SURROUND,
        .shared_clfe = BAD_SHARED_CLFE,
        .shared_surr_main = BAD_SHARED_SURROUND,
};
EXPORT_SYMBOL_HDA(hda_main_out_badness);

const struct badness_table hda_extra_out_badness = {
        .no_primary_dac = BAD_NO_DAC,
        .no_dac = BAD_NO_DAC,
        .shared_primary = BAD_NO_EXTRA_DAC,
        .shared_surr = BAD_SHARED_EXTRA_SURROUND,
        .shared_clfe = BAD_SHARED_EXTRA_SURROUND,
        .shared_surr_main = BAD_NO_EXTRA_SURR_DAC,
};
EXPORT_SYMBOL_HDA(hda_extra_out_badness);

/* get the DAC of the primary output corresponding to the given array index */
static hda_nid_t get_primary_out(struct hda_codec *codec, int idx)
{
        struct hda_gen_spec *spec = codec->spec;
        struct auto_pin_cfg *cfg = &spec->autocfg;

        if (cfg->line_outs > idx)
                return spec->private_dac_nids[idx];
        idx -= cfg->line_outs;
        if (spec->multi_ios > idx)
                return spec->multi_io[idx].dac;
        return 0;
}

/* return the DAC if it's reachable, otherwise zero */
static inline hda_nid_t try_dac(struct hda_codec *codec,
                                hda_nid_t dac, hda_nid_t pin)
{
        return is_reachable_path(codec, dac, pin) ? dac : 0;
}

/* try to assign DACs to pins and return the resultant badness */
static int try_assign_dacs(struct hda_codec *codec, int num_outs,
                           const hda_nid_t *pins, hda_nid_t *dacs,
                           int *path_idx,
                           const struct badness_table *bad)
{
        struct hda_gen_spec *spec = codec->spec;
        int i, j;
        int badness = 0;
        hda_nid_t dac;

        if (!num_outs)
                return 0;

        for (i = 0; i < num_outs; i++) {
                struct nid_path *path;
                hda_nid_t pin = pins[i];

                path = snd_hda_get_path_from_idx(codec, path_idx[i]);
                if (path) {
                        badness += assign_out_path_ctls(codec, path);
                        continue;
                }

                dacs[i] = look_for_dac(codec, pin, false);
                if (!dacs[i] && !i) {
                        /* try to steal the DAC of surrounds for the front */
                        for (j = 1; j < num_outs; j++) {
                                if (is_reachable_path(codec, dacs[j], pin)) {
                                        dacs[0] = dacs[j];
                                        dacs[j] = 0;
                                        invalidate_nid_path(codec, path_idx[j]);
                                        path_idx[j] = 0;
                                        break;
                                }
                        }
                }
                dac = dacs[i];
                if (!dac) {
                        if (num_outs > 2)
                                dac = try_dac(codec, get_primary_out(codec, i), pin);
                        if (!dac)
                                dac = try_dac(codec, dacs[0], pin);
                        if (!dac)
                                dac = try_dac(codec, get_primary_out(codec, i), pin);
                        if (dac) {
                                if (!i)
                                        badness += bad->shared_primary;
                                else if (i == 1)
                                        badness += bad->shared_surr;
                                else
                                        badness += bad->shared_clfe;
                        } else if (is_reachable_path(codec, spec->private_dac_nids[0], pin)) {
                                dac = spec->private_dac_nids[0];
                                badness += bad->shared_surr_main;
                        } else if (!i)
                                badness += bad->no_primary_dac;
                        else
                                badness += bad->no_dac;
                }
                if (!dac)
                        continue;
                path = snd_hda_add_new_path(codec, dac, pin, -spec->mixer_nid);
                if (!path && !i && spec->mixer_nid) {
                        /* try with aamix */
                        path = snd_hda_add_new_path(codec, dac, pin, 0);
                }
                if (!path) {
                        dac = dacs[i] = 0;
                        badness += bad->no_dac;
                } else {
                        /* print_nid_path("output", path); */
                        path->active = true;
                        path_idx[i] = snd_hda_get_path_idx(codec, path);
                        badness += assign_out_path_ctls(codec, path);
                }
        }

        return badness;
}

/* return NID if the given pin has only a single connection to a certain DAC */
static hda_nid_t get_dac_if_single(struct hda_codec *codec, hda_nid_t pin)
{
        struct hda_gen_spec *spec = codec->spec;
        int i;
        hda_nid_t nid_found = 0;

        for (i = 0; i < spec->num_all_dacs; i++) {
                hda_nid_t nid = spec->all_dacs[i];
                if (!nid || is_dac_already_used(codec, nid))
                        continue;
                if (is_reachable_path(codec, nid, pin)) {
                        if (nid_found)
                                return 0;
                        nid_found = nid;
                }
        }
        return nid_found;
}

/* check whether the given pin can be a multi-io pin */
static bool can_be_multiio_pin(struct hda_codec *codec,
                               unsigned int location, hda_nid_t nid)
{
        unsigned int defcfg, caps;

        defcfg = snd_hda_codec_get_pincfg(codec, nid);
        if (get_defcfg_connect(defcfg) != AC_JACK_PORT_COMPLEX)
                return false;
        if (location && get_defcfg_location(defcfg) != location)
                return false;
        caps = snd_hda_query_pin_caps(codec, nid);
        if (!(caps & AC_PINCAP_OUT))
                return false;
        return true;
}

/* count the number of input pins that are capable to be multi-io */
static int count_multiio_pins(struct hda_codec *codec, hda_nid_t reference_pin)
{
        struct hda_gen_spec *spec = codec->spec;
        struct auto_pin_cfg *cfg = &spec->autocfg;
        unsigned int defcfg = snd_hda_codec_get_pincfg(codec, reference_pin);
        unsigned int location = get_defcfg_location(defcfg);
        int type, i;
        int num_pins = 0;

        for (type = AUTO_PIN_LINE_IN; type >= AUTO_PIN_MIC; type--) {
                for (i = 0; i < cfg->num_inputs; i++) {
                        if (cfg->inputs[i].type != type)
                                continue;
                        if (can_be_multiio_pin(codec, location,
                                               cfg->inputs[i].pin))
                                num_pins++;
                }
        }
        return num_pins;
}

/*
 * multi-io helper
 *
 * When hardwired is set, try to fill ony hardwired pins, and returns
 * zero if any pins are filled, non-zero if nothing found.
 * When hardwired is off, try to fill possible input pins, and returns
 * the badness value.
 */
static int fill_multi_ios(struct hda_codec *codec,
                          hda_nid_t reference_pin,
                          bool hardwired)
{
        struct hda_gen_spec *spec = codec->spec;
        struct auto_pin_cfg *cfg = &spec->autocfg;
        int type, i, j, num_pins, old_pins;
        unsigned int defcfg = snd_hda_codec_get_pincfg(codec, reference_pin);
        unsigned int location = get_defcfg_location(defcfg);
        int badness = 0;
        struct nid_path *path;

        old_pins = spec->multi_ios;
        if (old_pins >= 2)
                goto end_fill;

        num_pins = count_multiio_pins(codec, reference_pin);
        if (num_pins < 2)
                goto end_fill;

        for (type = AUTO_PIN_LINE_IN; type >= AUTO_PIN_MIC; type--) {
                for (i = 0; i < cfg->num_inputs; i++) {
                        hda_nid_t nid = cfg->inputs[i].pin;
                        hda_nid_t dac = 0;

                        if (cfg->inputs[i].type != type)
                                continue;
                        if (!can_be_multiio_pin(codec, location, nid))
                                continue;
                        for (j = 0; j < spec->multi_ios; j++) {
                                if (nid == spec->multi_io[j].pin)
                                        break;
                        }
                        if (j < spec->multi_ios)
                                continue;

                        if (hardwired)
                                dac = get_dac_if_single(codec, nid);
                        else if (!dac)
                                dac = look_for_dac(codec, nid, false);
                        if (!dac) {
                                badness++;
                                continue;
                        }
                        path = snd_hda_add_new_path(codec, dac, nid,
                                                    -spec->mixer_nid);
                        if (!path) {
                                badness++;
                                continue;
                        }
                        /* print_nid_path("multiio", path); */
                        spec->multi_io[spec->multi_ios].pin = nid;
                        spec->multi_io[spec->multi_ios].dac = dac;
                        spec->out_paths[cfg->line_outs + spec->multi_ios] =
                                snd_hda_get_path_idx(codec, path);
                        spec->multi_ios++;
                        if (spec->multi_ios >= 2)
                                break;
                }
        }
 end_fill:
        if (badness)
                badness = BAD_MULTI_IO;
        if (old_pins == spec->multi_ios) {
                if (hardwired)
                        return 1; /* nothing found */
                else
                        return badness; /* no badness if nothing found */
        }
        if (!hardwired && spec->multi_ios < 2) {
                /* cancel newly assigned paths */
                spec->paths.used -= spec->multi_ios - old_pins;
                spec->multi_ios = old_pins;
                return badness;
        }

        /* assign volume and mute controls */
        for (i = old_pins; i < spec->multi_ios; i++) {
                path = snd_hda_get_path_from_idx(codec, spec->out_paths[cfg->line_outs + i]);
                badness += assign_out_path_ctls(codec, path);
        }

        return badness;
}

/* map DACs for all pins in the list if they are single connections */
static bool map_singles(struct hda_codec *codec, int outs,
                        const hda_nid_t *pins, hda_nid_t *dacs, int *path_idx)
{
        struct hda_gen_spec *spec = codec->spec;
        int i;
        bool found = false;
        for (i = 0; i < outs; i++) {
                struct nid_path *path;
                hda_nid_t dac;
                if (dacs[i])
                        continue;
                dac = get_dac_if_single(codec, pins[i]);
                if (!dac)
                        continue;
                path = snd_hda_add_new_path(codec, dac, pins[i],
                                            -spec->mixer_nid);
                if (!path && !i && spec->mixer_nid)
                        path = snd_hda_add_new_path(codec, dac, pins[i], 0);
                if (path) {
                        dacs[i] = dac;
                        found = true;
                        /* print_nid_path("output", path); */
                        path->active = true;
                        path_idx[i] = snd_hda_get_path_idx(codec, path);
                }
        }
        return found;
}

/* create a new path including aamix if available, and return its index */
static int check_aamix_out_path(struct hda_codec *codec, int path_idx)
{
        struct hda_gen_spec *spec = codec->spec;
        struct nid_path *path;
        hda_nid_t path_dac, dac, pin;

        path = snd_hda_get_path_from_idx(codec, path_idx);
        if (!path || !path->depth ||
            is_nid_contained(path, spec->mixer_nid))
                return 0;
        path_dac = path->path[0];
        dac = spec->private_dac_nids[0];
        pin = path->path[path->depth - 1];
        path = snd_hda_add_new_path(codec, dac, pin, spec->mixer_nid);
        if (!path) {
                if (dac != path_dac)
                        dac = path_dac;
                else if (spec->multiout.hp_out_nid[0])
                        dac = spec->multiout.hp_out_nid[0];
                else if (spec->multiout.extra_out_nid[0])
                        dac = spec->multiout.extra_out_nid[0];
                else
                        dac = 0;
                if (dac)
                        path = snd_hda_add_new_path(codec, dac, pin,
                                                    spec->mixer_nid);
        }
        if (!path)
                return 0;
        /* print_nid_path("output-aamix", path); */
        path->active = false; /* unused as default */
        return snd_hda_get_path_idx(codec, path);
}

/* check whether the independent HP is available with the current config */
static bool indep_hp_possible(struct hda_codec *codec)
{
        struct hda_gen_spec *spec = codec->spec;
        struct auto_pin_cfg *cfg = &spec->autocfg;
        struct nid_path *path;
        int i, idx;

        if (cfg->line_out_type == AUTO_PIN_HP_OUT)
                idx = spec->out_paths[0];
        else
                idx = spec->hp_paths[0];
        path = snd_hda_get_path_from_idx(codec, idx);
        if (!path)
                return false;

        /* assume no path conflicts unless aamix is involved */
        if (!spec->mixer_nid || !is_nid_contained(path, spec->mixer_nid))
                return true;

        /* check whether output paths contain aamix */
        for (i = 0; i < cfg->line_outs; i++) {
                if (spec->out_paths[i] == idx)
                        break;
                path = snd_hda_get_path_from_idx(codec, spec->out_paths[i]);
                if (path && is_nid_contained(path, spec->mixer_nid))
                        return false;
        }
        for (i = 0; i < cfg->speaker_outs; i++) {
                path = snd_hda_get_path_from_idx(codec, spec->speaker_paths[i]);
                if (path && is_nid_contained(path, spec->mixer_nid))
                        return false;
        }

        return true;
}

/* fill the empty entries in the dac array for speaker/hp with the
 * shared dac pointed by the paths
 */
static void refill_shared_dacs(struct hda_codec *codec, int num_outs,
                               hda_nid_t *dacs, int *path_idx)
{
        struct nid_path *path;
        int i;

        for (i = 0; i < num_outs; i++) {
                if (dacs[i])
                        continue;
                path = snd_hda_get_path_from_idx(codec, path_idx[i]);
                if (!path)
                        continue;
                dacs[i] = path->path[0];
        }
}

/* fill in the dac_nids table from the parsed pin configuration */
static int fill_and_eval_dacs(struct hda_codec *codec,
                              bool fill_hardwired,
                              bool fill_mio_first)
{
        struct hda_gen_spec *spec = codec->spec;
        struct auto_pin_cfg *cfg = &spec->autocfg;
        int i, err, badness;

        /* set num_dacs once to full for look_for_dac() */
        spec->multiout.num_dacs = cfg->line_outs;
        spec->multiout.dac_nids = spec->private_dac_nids;
        memset(spec->private_dac_nids, 0, sizeof(spec->private_dac_nids));
        memset(spec->multiout.hp_out_nid, 0, sizeof(spec->multiout.hp_out_nid));
        memset(spec->multiout.extra_out_nid, 0, sizeof(spec->multiout.extra_out_nid));
        spec->multi_ios = 0;
        snd_array_free(&spec->paths);

        /* clear path indices */
        memset(spec->out_paths, 0, sizeof(spec->out_paths));
        memset(spec->hp_paths, 0, sizeof(spec->hp_paths));
        memset(spec->speaker_paths, 0, sizeof(spec->speaker_paths));
        memset(spec->aamix_out_paths, 0, sizeof(spec->aamix_out_paths));
        memset(spec->digout_paths, 0, sizeof(spec->digout_paths));
        memset(spec->input_paths, 0, sizeof(spec->input_paths));
        memset(spec->loopback_paths, 0, sizeof(spec->loopback_paths));
        memset(&spec->digin_path, 0, sizeof(spec->digin_path));

        badness = 0;

        /* fill hard-wired DACs first */
        if (fill_hardwired) {
                bool mapped;
                do {
                        mapped = map_singles(codec, cfg->line_outs,
                                             cfg->line_out_pins,
                                             spec->private_dac_nids,
                                             spec->out_paths);
                        mapped |= map_singles(codec, cfg->hp_outs,
                                              cfg->hp_pins,
                                              spec->multiout.hp_out_nid,
                                              spec->hp_paths);
                        mapped |= map_singles(codec, cfg->speaker_outs,
                                              cfg->speaker_pins,
                                              spec->multiout.extra_out_nid,
                                              spec->speaker_paths);
                        if (fill_mio_first && cfg->line_outs == 1 &&
                            cfg->line_out_type != AUTO_PIN_SPEAKER_OUT) {
                                err = fill_multi_ios(codec, cfg->line_out_pins[0], true);
                                if (!err)
                                        mapped = true;
                        }
                } while (mapped);
        }

        badness += try_assign_dacs(codec, cfg->line_outs, cfg->line_out_pins,
                                   spec->private_dac_nids, spec->out_paths,
                                   spec->main_out_badness);

        if (fill_mio_first &&
            cfg->line_outs == 1 && cfg->line_out_type != AUTO_PIN_SPEAKER_OUT) {
                /* try to fill multi-io first */
                err = fill_multi_ios(codec, cfg->line_out_pins[0], false);
                if (err < 0)
                        return err;
                /* we don't count badness at this stage yet */
        }

        if (cfg->line_out_type != AUTO_PIN_HP_OUT) {
                err = try_assign_dacs(codec, cfg->hp_outs, cfg->hp_pins,
                                      spec->multiout.hp_out_nid,
                                      spec->hp_paths,
                                      spec->extra_out_badness);
                if (err < 0)
                        return err;
                badness += err;
        }
        if (cfg->line_out_type != AUTO_PIN_SPEAKER_OUT) {
                err = try_assign_dacs(codec, cfg->speaker_outs,
                                      cfg->speaker_pins,
                                      spec->multiout.extra_out_nid,
                                      spec->speaker_paths,
                                      spec->extra_out_badness);
                if (err < 0)
                        return err;
                badness += err;
        }
        if (cfg->line_outs == 1 && cfg->line_out_type != AUTO_PIN_SPEAKER_OUT) {
                err = fill_multi_ios(codec, cfg->line_out_pins[0], false);
                if (err < 0)
                        return err;
                badness += err;
        }

        if (spec->mixer_nid) {
                spec->aamix_out_paths[0] =
                        check_aamix_out_path(codec, spec->out_paths[0]);
                if (cfg->line_out_type != AUTO_PIN_HP_OUT)
                        spec->aamix_out_paths[1] =
                                check_aamix_out_path(codec, spec->hp_paths[0]);
                if (cfg->line_out_type != AUTO_PIN_SPEAKER_OUT)
                        spec->aamix_out_paths[2] =
                                check_aamix_out_path(codec, spec->speaker_paths[0]);
        }

        if (cfg->hp_outs && cfg->line_out_type == AUTO_PIN_SPEAKER_OUT)
                if (count_multiio_pins(codec, cfg->hp_pins[0]) >= 2)
                        spec->multi_ios = 1; /* give badness */

        /* re-count num_dacs and squash invalid entries */
        spec->multiout.num_dacs = 0;
        for (i = 0; i < cfg->line_outs; i++) {
                if (spec->private_dac_nids[i])
                        spec->multiout.num_dacs++;
                else {
                        memmove(spec->private_dac_nids + i,
                                spec->private_dac_nids + i + 1,
                                sizeof(hda_nid_t) * (cfg->line_outs - i - 1));
                        spec->private_dac_nids[cfg->line_outs - 1] = 0;
                }
        }

        spec->ext_channel_count = spec->min_channel_count =
                spec->multiout.num_dacs * 2;

        if (spec->multi_ios == 2) {
                for (i = 0; i < 2; i++)
                        spec->private_dac_nids[spec->multiout.num_dacs++] =
                                spec->multi_io[i].dac;
        } else if (spec->multi_ios) {
                spec->multi_ios = 0;
                badness += BAD_MULTI_IO;
        }

        if (spec->indep_hp && !indep_hp_possible(codec))
                badness += BAD_NO_INDEP_HP;

        /* re-fill the shared DAC for speaker / headphone */
        if (cfg->line_out_type != AUTO_PIN_HP_OUT)
                refill_shared_dacs(codec, cfg->hp_outs,
                                   spec->multiout.hp_out_nid,
                                   spec->hp_paths);
        if (cfg->line_out_type != AUTO_PIN_SPEAKER_OUT)
                refill_shared_dacs(codec, cfg->speaker_outs,
                                   spec->multiout.extra_out_nid,
                                   spec->speaker_paths);

        return badness;
}

#define DEBUG_BADNESS

#ifdef DEBUG_BADNESS
#define debug_badness   snd_printdd
#else
#define debug_badness(...)
#endif

#ifdef DEBUG_BADNESS
static inline void print_nid_path_idx(struct hda_codec *codec,
                                      const char *pfx, int idx)
{
        struct nid_path *path;

        path = snd_hda_get_path_from_idx(codec, idx);
        if (path)
                print_nid_path(pfx, path);
}

static void debug_show_configs(struct hda_codec *codec,
                               struct auto_pin_cfg *cfg)
{
        struct hda_gen_spec *spec = codec->spec;
        static const char * const lo_type[3] = { "LO", "SP", "HP" };
        int i;

        debug_badness("multi_outs = %x/%x/%x/%x : %x/%x/%x/%x (type %s)\n",
                      cfg->line_out_pins[0], cfg->line_out_pins[1],
                      cfg->line_out_pins[2], cfg->line_out_pins[3],
                      spec->multiout.dac_nids[0],
                      spec->multiout.dac_nids[1],
                      spec->multiout.dac_nids[2],
                      spec->multiout.dac_nids[3],
                      lo_type[cfg->line_out_type]);
        for (i = 0; i < cfg->line_outs; i++)
                print_nid_path_idx(codec, "  out", spec->out_paths[i]);
        if (spec->multi_ios > 0)
                debug_badness("multi_ios(%d) = %x/%x : %x/%x\n",
                              spec->multi_ios,
                              spec->multi_io[0].pin, spec->multi_io[1].pin,
                              spec->multi_io[0].dac, spec->multi_io[1].dac);
        for (i = 0; i < spec->multi_ios; i++)
                print_nid_path_idx(codec, "  mio",
                                   spec->out_paths[cfg->line_outs + i]);
        if (cfg->hp_outs)
                debug_badness("hp_outs = %x/%x/%x/%x : %x/%x/%x/%x\n",
                      cfg->hp_pins[0], cfg->hp_pins[1],
                      cfg->hp_pins[2], cfg->hp_pins[3],
                      spec->multiout.hp_out_nid[0],
                      spec->multiout.hp_out_nid[1],
                      spec->multiout.hp_out_nid[2],
                      spec->multiout.hp_out_nid[3]);
        for (i = 0; i < cfg->hp_outs; i++)
                print_nid_path_idx(codec, "  hp ", spec->hp_paths[i]);
        if (cfg->speaker_outs)
                debug_badness("spk_outs = %x/%x/%x/%x : %x/%x/%x/%x\n",
                      cfg->speaker_pins[0], cfg->speaker_pins[1],
                      cfg->speaker_pins[2], cfg->speaker_pins[3],
                      spec->multiout.extra_out_nid[0],
                      spec->multiout.extra_out_nid[1],
                      spec->multiout.extra_out_nid[2],
                      spec->multiout.extra_out_nid[3]);
        for (i = 0; i < cfg->speaker_outs; i++)
                print_nid_path_idx(codec, "  spk", spec->speaker_paths[i]);
        for (i = 0; i < 3; i++)
                print_nid_path_idx(codec, "  mix", spec->aamix_out_paths[i]);
}
#else
#define debug_show_configs(codec, cfg) /* NOP */
#endif

/* find all available DACs of the codec */
static void fill_all_dac_nids(struct hda_codec *codec)
{
        struct hda_gen_spec *spec = codec->spec;
        int i;
        hda_nid_t nid = codec->start_nid;

        spec->num_all_dacs = 0;
        memset(spec->all_dacs, 0, sizeof(spec->all_dacs));
        for (i = 0; i < codec->num_nodes; i++, nid++) {
                if (get_wcaps_type(get_wcaps(codec, nid)) != AC_WID_AUD_OUT)
                        continue;
                if (spec->num_all_dacs >= ARRAY_SIZE(spec->all_dacs)) {
                        snd_printk(KERN_ERR "hda: Too many DACs!\n");
                        break;
                }
                spec->all_dacs[spec->num_all_dacs++] = nid;
        }
}

static int parse_output_paths(struct hda_codec *codec)
{
        struct hda_gen_spec *spec = codec->spec;
        struct auto_pin_cfg *cfg = &spec->autocfg;
        struct auto_pin_cfg *best_cfg;
        unsigned int val;
        int best_badness = INT_MAX;
        int badness;
        bool fill_hardwired = true, fill_mio_first = true;
        bool best_wired = true, best_mio = true;
        bool hp_spk_swapped = false;

        best_cfg = kmalloc(sizeof(*best_cfg), GFP_KERNEL);
        if (!best_cfg)
                return -ENOMEM;
        *best_cfg = *cfg;

        for (;;) {
                badness = fill_and_eval_dacs(codec, fill_hardwired,
                                             fill_mio_first);
                if (badness < 0) {
                        kfree(best_cfg);
                        return badness;
                }
                debug_badness("==> lo_type=%d, wired=%d, mio=%d, badness=0x%x\n",
                              cfg->line_out_type, fill_hardwired, fill_mio_first,
                              badness);
                debug_show_configs(codec, cfg);
                if (badness < best_badness) {
                        best_badness = badness;
                        *best_cfg = *cfg;
                        best_wired = fill_hardwired;
                        best_mio = fill_mio_first;
                }
                if (!badness)
                        break;
                fill_mio_first = !fill_mio_first;
                if (!fill_mio_first)
                        continue;
                fill_hardwired = !fill_hardwired;
                if (!fill_hardwired)
                        continue;
                if (hp_spk_swapped)
                        break;
                hp_spk_swapped = true;
                if (cfg->speaker_outs > 0 &&
                    cfg->line_out_type == AUTO_PIN_HP_OUT) {
                        cfg->hp_outs = cfg->line_outs;
                        memcpy(cfg->hp_pins, cfg->line_out_pins,
                               sizeof(cfg->hp_pins));
                        cfg->line_outs = cfg->speaker_outs;
                        memcpy(cfg->line_out_pins, cfg->speaker_pins,
                               sizeof(cfg->speaker_pins));
                        cfg->speaker_outs = 0;
                        memset(cfg->speaker_pins, 0, sizeof(cfg->speaker_pins));
                        cfg->line_out_type = AUTO_PIN_SPEAKER_OUT;
                        fill_hardwired = true;
                        continue;
                }
                if (cfg->hp_outs > 0 &&
                    cfg->line_out_type == AUTO_PIN_SPEAKER_OUT) {
                        cfg->speaker_outs = cfg->line_outs;
                        memcpy(cfg->speaker_pins, cfg->line_out_pins,
                               sizeof(cfg->speaker_pins));
                        cfg->line_outs = cfg->hp_outs;
                        memcpy(cfg->line_out_pins, cfg->hp_pins,
                               sizeof(cfg->hp_pins));
                        cfg->hp_outs = 0;
                        memset(cfg->hp_pins, 0, sizeof(cfg->hp_pins));
                        cfg->line_out_type = AUTO_PIN_HP_OUT;
                        fill_hardwired = true;
                        continue;
                }
                break;
        }

        if (badness) {
                debug_badness("==> restoring best_cfg\n");
                *cfg = *best_cfg;
                fill_and_eval_dacs(codec, best_wired, best_mio);
        }
        debug_badness("==> Best config: lo_type=%d, wired=%d, mio=%d\n",
                      cfg->line_out_type, best_wired, best_mio);
        debug_show_configs(codec, cfg);

        if (cfg->line_out_pins[0]) {
                struct nid_path *path;
                path = snd_hda_get_path_from_idx(codec, spec->out_paths[0]);
                if (path)
                        spec->vmaster_nid = look_for_out_vol_nid(codec, path);
                if (spec->vmaster_nid)
                        snd_hda_set_vmaster_tlv(codec, spec->vmaster_nid,
                                                HDA_OUTPUT, spec->vmaster_tlv);
        }

        /* set initial pinctl targets */
        if (spec->prefer_hp_amp || cfg->line_out_type == AUTO_PIN_HP_OUT)
                val = PIN_HP;
        else
                val = PIN_OUT;
        set_pin_targets(codec, cfg->line_outs, cfg->line_out_pins, val);
        if (cfg->line_out_type != AUTO_PIN_HP_OUT)
                set_pin_targets(codec, cfg->hp_outs, cfg->hp_pins, PIN_HP);
        if (cfg->line_out_type != AUTO_PIN_SPEAKER_OUT) {
                val = spec->prefer_hp_amp ? PIN_HP : PIN_OUT;
                set_pin_targets(codec, cfg->speaker_outs,
                                cfg->speaker_pins, val);
        }

        /* clear indep_hp flag if not available */
        if (spec->indep_hp && !indep_hp_possible(codec))
                spec->indep_hp = 0;

        kfree(best_cfg);
        return 0;
}

/* add playback controls from the parsed DAC table */
static int create_multi_out_ctls(struct hda_codec *codec,
                                 const struct auto_pin_cfg *cfg)
{
        struct hda_gen_spec *spec = codec->spec;
        int i, err, noutputs;

        noutputs = cfg->line_outs;
        if (spec->multi_ios > 0 && cfg->line_outs < 3)
                noutputs += spec->multi_ios;

        for (i = 0; i < noutputs; i++) {
                const char *name;
                int index;
                struct nid_path *path;

                path = snd_hda_get_path_from_idx(codec, spec->out_paths[i]);
                if (!path)
                        continue;

                name = get_line_out_pfx(codec, i, &index, NID_PATH_VOL_CTL);
                if (!name || !strcmp(name, "CLFE")) {
                        /* Center/LFE */
                        err = add_vol_ctl(codec, "Center", 0, 1, path);
                        if (err < 0)
                                return err;
                        err = add_vol_ctl(codec, "LFE", 0, 2, path);
                        if (err < 0)
                                return err;
                } else {
                        err = add_stereo_vol(codec, name, index, path);
                        if (err < 0)
                                return err;
                }

                name = get_line_out_pfx(codec, i, &index, NID_PATH_MUTE_CTL);
                if (!name || !strcmp(name, "CLFE")) {
                        err = add_sw_ctl(codec, "Center", 0, 1, path);
                        if (err < 0)
                                return err;
                        err = add_sw_ctl(codec, "LFE", 0, 2, path);
                        if (err < 0)
                                return err;
                } else {
                        err = add_stereo_sw(codec, name, index, path);
                        if (err < 0)
                                return err;
                }
        }
        return 0;
}

static int create_extra_out(struct hda_codec *codec, int path_idx,
                            const char *pfx, int cidx)
{
        struct nid_path *path;
        int err;

        path = snd_hda_get_path_from_idx(codec, path_idx);
        if (!path)
                return 0;
        err = add_stereo_vol(codec, pfx, cidx, path);
        if (err < 0)
                return err;
        err = add_stereo_sw(codec, pfx, cidx, path);
        if (err < 0)
                return err;
        return 0;
}

/* add playback controls for speaker and HP outputs */
static int create_extra_outs(struct hda_codec *codec, int num_pins,
                             const int *paths, const char *pfx)
{
        int i;

        for (i = 0; i < num_pins; i++) {
                const char *name;
                char tmp[SNDRV_CTL_ELEM_ID_NAME_MAXLEN];
                int err, idx = 0;

                if (num_pins == 2 && i == 1 && !strcmp(pfx, "Speaker"))
                        name = "Bass Speaker";
                else if (num_pins >= 3) {
                        snprintf(tmp, sizeof(tmp), "%s %s",
                                 pfx, channel_name[i]);
                        name = tmp;
                } else {
                        name = pfx;
                        idx = i;
                }
                err = create_extra_out(codec, paths[i], name, idx);
                if (err < 0)
                        return err;
        }
        return 0;
}

static int create_hp_out_ctls(struct hda_codec *codec)
{
        struct hda_gen_spec *spec = codec->spec;
        return create_extra_outs(codec, spec->autocfg.hp_outs,
                                 spec->hp_paths,
                                 "Headphone");
}

static int create_speaker_out_ctls(struct hda_codec *codec)
{
        struct hda_gen_spec *spec = codec->spec;
        return create_extra_outs(codec, spec->autocfg.speaker_outs,
                                 spec->speaker_paths,
                                 "Speaker");
}

/*
 * independent HP controls
 */

static void call_hp_automute(struct hda_codec *codec, struct hda_jack_tbl *jack);
static int indep_hp_info(struct snd_kcontrol *kcontrol,
                         struct snd_ctl_elem_info *uinfo)
{
        return snd_hda_enum_bool_helper_info(kcontrol, uinfo);
}

static int indep_hp_get(struct snd_kcontrol *kcontrol,
                        struct snd_ctl_elem_value *ucontrol)
{
        struct hda_codec *codec = snd_kcontrol_chip(kcontrol);
        struct hda_gen_spec *spec = codec->spec;
        ucontrol->value.enumerated.item[0] = spec->indep_hp_enabled;
        return 0;
}

static void update_aamix_paths(struct hda_codec *codec, bool do_mix,
                               int nomix_path_idx, int mix_path_idx,
                               int out_type);

static int indep_hp_put(struct snd_kcontrol *kcontrol,
                        struct snd_ctl_elem_value *ucontrol)
{
        struct hda_codec *codec = snd_kcontrol_chip(kcontrol);
        struct hda_gen_spec *spec = codec->spec;
        unsigned int select = ucontrol->value.enumerated.item[0];
        int ret = 0;

        mutex_lock(&spec->pcm_mutex);
        if (spec->active_streams) {
                ret = -EBUSY;
                goto unlock;
        }

        if (spec->indep_hp_enabled != select) {
                hda_nid_t *dacp;
                if (spec->autocfg.line_out_type == AUTO_PIN_HP_OUT)
                        dacp = &spec->private_dac_nids[0];
                else
                        dacp = &spec->multiout.hp_out_nid[0];

                /* update HP aamix paths in case it conflicts with indep HP */
                if (spec->have_aamix_ctl) {
                        if (spec->autocfg.line_out_type == AUTO_PIN_HP_OUT)
                                update_aamix_paths(codec, spec->aamix_mode,
                                                   spec->out_paths[0],
                                                   spec->aamix_out_paths[0],
                                                   spec->autocfg.line_out_type);
                        else
                                update_aamix_paths(codec, spec->aamix_mode,
                                                   spec->hp_paths[0],
                                                   spec->aamix_out_paths[1],
                                                   AUTO_PIN_HP_OUT);
                }

                spec->indep_hp_enabled = select;
                if (spec->indep_hp_enabled)
                        *dacp = 0;
                else
                        *dacp = spec->alt_dac_nid;

                call_hp_automute(codec, NULL);
                ret = 1;
        }
 unlock:
        mutex_unlock(&spec->pcm_mutex);
        return ret;
}

static const struct snd_kcontrol_new indep_hp_ctl = {
        .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
        .name = "Independent HP",
        .info = indep_hp_info,
        .get = indep_hp_get,
        .put = indep_hp_put,
};


static int create_indep_hp_ctls(struct hda_codec *codec)
{
        struct hda_gen_spec *spec = codec->spec;
        hda_nid_t dac;

        if (!spec->indep_hp)
                return 0;
        if (spec->autocfg.line_out_type == AUTO_PIN_HP_OUT)
                dac = spec->multiout.dac_nids[0];
        else
                dac = spec->multiout.hp_out_nid[0];
        if (!dac) {
                spec->indep_hp = 0;
                return 0;
        }

        spec->indep_hp_enabled = false;
        spec->alt_dac_nid = dac;
        if (!snd_hda_gen_add_kctl(spec, NULL, &indep_hp_ctl))
                return -ENOMEM;
        return 0;
}

/*
 * channel mode enum control
 */

static int ch_mode_info(struct snd_kcontrol *kcontrol,
                        struct snd_ctl_elem_info *uinfo)
{
        struct hda_codec *codec = snd_kcontrol_chip(kcontrol);
        struct hda_gen_spec *spec = codec->spec;
        int chs;

        uinfo->type = SNDRV_CTL_ELEM_TYPE_ENUMERATED;
        uinfo->count = 1;
        uinfo->value.enumerated.items = spec->multi_ios + 1;
        if (uinfo->value.enumerated.item > spec->multi_ios)
                uinfo->value.enumerated.item = spec->multi_ios;
        chs = uinfo->value.enumerated.item * 2 + spec->min_channel_count;
        sprintf(uinfo->value.enumerated.name, "%dch", chs);
        return 0;
}

static int ch_mode_get(struct snd_kcontrol *kcontrol,
                       struct snd_ctl_elem_value *ucontrol)
{
        struct hda_codec *codec = snd_kcontrol_chip(kcontrol);
        struct hda_gen_spec *spec = codec->spec;
        ucontrol->value.enumerated.item[0] =
                (spec->ext_channel_count - spec->min_channel_count) / 2;
        return 0;
}

static inline struct nid_path *
get_multiio_path(struct hda_codec *codec, int idx)
{
        struct hda_gen_spec *spec = codec->spec;
        return snd_hda_get_path_from_idx(codec,
                spec->out_paths[spec->autocfg.line_outs + idx]);
}

static void update_automute_all(struct hda_codec *codec);

/* Default value to be passed as aamix argument for snd_hda_activate_path();
 * used for output paths
 */
static bool aamix_default(struct hda_gen_spec *spec)
{
        return !spec->have_aamix_ctl || spec->aamix_mode;
}

static int set_multi_io(struct hda_codec *codec, int idx, bool output)
{
        struct hda_gen_spec *spec = codec->spec;
        hda_nid_t nid = spec->multi_io[idx].pin;
        struct nid_path *path;

        path = get_multiio_path(codec, idx);
        if (!path)
                return -EINVAL;

        if (path->active == output)
                return 0;

        if (output) {
                set_pin_target(codec, nid, PIN_OUT, true);
                snd_hda_activate_path(codec, path, true, aamix_default(spec));
                set_pin_eapd(codec, nid, true);
        } else {
                set_pin_eapd(codec, nid, false);
                snd_hda_activate_path(codec, path, false, aamix_default(spec));
                set_pin_target(codec, nid, spec->multi_io[idx].ctl_in, true);
                path_power_down_sync(codec, path);
        }

        /* update jack retasking in case it modifies any of them */
        update_automute_all(codec);

        return 0;
}

static int ch_mode_put(struct snd_kcontrol *kcontrol,
                       struct snd_ctl_elem_value *ucontrol)
{
        struct hda_codec *codec = snd_kcontrol_chip(kcontrol);
        struct hda_gen_spec *spec = codec->spec;
        int i, ch;

        ch = ucontrol->value.enumerated.item[0];
        if (ch < 0 || ch > spec->multi_ios)
                return -EINVAL;
        if (ch == (spec->ext_channel_count - spec->min_channel_count) / 2)
                return 0;
        spec->ext_channel_count = ch * 2 + spec->min_channel_count;
        for (i = 0; i < spec->multi_ios; i++)
                set_multi_io(codec, i, i < ch);
        spec->multiout.max_channels = max(spec->ext_channel_count,
                                          spec->const_channel_count);
        if (spec->need_dac_fix)
                spec->multiout.num_dacs = spec->multiout.max_channels / 2;
        return 1;
}

static const struct snd_kcontrol_new channel_mode_enum = {
        .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
        .name = "Channel Mode",
        .info = ch_mode_info,
        .get = ch_mode_get,
        .put = ch_mode_put,
};

static int create_multi_channel_mode(struct hda_codec *codec)
{
        struct hda_gen_spec *spec = codec->spec;

        if (spec->multi_ios > 0) {
                if (!snd_hda_gen_add_kctl(spec, NULL, &channel_mode_enum))
                        return -ENOMEM;
        }
        return 0;
}

/*
 * aamix loopback enable/disable switch
 */

#define loopback_mixing_info    indep_hp_info

static int loopback_mixing_get(struct snd_kcontrol *kcontrol,
                               struct snd_ctl_elem_value *ucontrol)
{
        struct hda_codec *codec = snd_kcontrol_chip(kcontrol);
        struct hda_gen_spec *spec = codec->spec;
        ucontrol->value.enumerated.item[0] = spec->aamix_mode;
        return 0;
}

static void update_aamix_paths(struct hda_codec *codec, bool do_mix,
                               int nomix_path_idx, int mix_path_idx,
                               int out_type)
{
        struct hda_gen_spec *spec = codec->spec;
        struct nid_path *nomix_path, *mix_path;

        nomix_path = snd_hda_get_path_from_idx(codec, nomix_path_idx);
        mix_path = snd_hda_get_path_from_idx(codec, mix_path_idx);
        if (!nomix_path || !mix_path)
                return;

        /* if HP aamix path is driven from a different DAC and the
         * independent HP mode is ON, can't turn on aamix path
         */
        if (out_type == AUTO_PIN_HP_OUT && spec->indep_hp_enabled &&
            mix_path->path[0] != spec->alt_dac_nid)
                do_mix = false;

        if (do_mix) {
                snd_hda_activate_path(codec, nomix_path, false, true);
                snd_hda_activate_path(codec, mix_path, true, true);
                path_power_down_sync(codec, nomix_path);
        } else {
                snd_hda_activate_path(codec, mix_path, false, false);
                snd_hda_activate_path(codec, nomix_path, true, false);
                path_power_down_sync(codec, mix_path);
        }
}

static int loopback_mixing_put(struct snd_kcontrol *kcontrol,
                               struct snd_ctl_elem_value *ucontrol)
{
        struct hda_codec *codec = snd_kcontrol_chip(kcontrol);
        struct hda_gen_spec *spec = codec->spec;
        unsigned int val = ucontrol->value.enumerated.item[0];

        if (val == spec->aamix_mode)
                return 0;
        spec->aamix_mode = val;
        update_aamix_paths(codec, val, spec->out_paths[0],
                           spec->aamix_out_paths[0],
                           spec->autocfg.line_out_type);
        update_aamix_paths(codec, val, spec->hp_paths[0],
                           spec->aamix_out_paths[1],
                           AUTO_PIN_HP_OUT);
        update_aamix_paths(codec, val, spec->speaker_paths[0],
                           spec->aamix_out_paths[2],
                           AUTO_PIN_SPEAKER_OUT);
        return 1;
}

static const struct snd_kcontrol_new loopback_mixing_enum = {
        .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
        .name = "Loopback Mixing",
        .info = loopback_mixing_info,
        .get = loopback_mixing_get,
        .put = loopback_mixing_put,
};

static int create_loopback_mixing_ctl(struct hda_codec *codec)
{
        struct hda_gen_spec *spec = codec->spec;

        if (!spec->mixer_nid)
                return 0;
        if (!(spec->aamix_out_paths[0] || spec->aamix_out_paths[1] ||
              spec->aamix_out_paths[2]))
                return 0;
        if (!snd_hda_gen_add_kctl(spec, NULL, &loopback_mixing_enum))
                return -ENOMEM;
        spec->have_aamix_ctl = 1;
        return 0;
}

/*
 * shared headphone/mic handling
 */

static void call_update_outputs(struct hda_codec *codec);

/* for shared I/O, change the pin-control accordingly */
static void update_hp_mic(struct hda_codec *codec, int adc_mux, bool force)
{
        struct hda_gen_spec *spec = codec->spec;
        bool as_mic;
        unsigned int val;
        hda_nid_t pin;

        pin = spec->hp_mic_pin;
        as_mic = spec->cur_mux[adc_mux] == spec->hp_mic_mux_idx;

        if (!force) {
                val = snd_hda_codec_get_pin_target(codec, pin);
                if (as_mic) {
                        if (val & PIN_IN)
                                return;
                } else {
                        if (val & PIN_OUT)
                                return;
                }
        }

        val = snd_hda_get_default_vref(codec, pin);
        /* if the HP pin doesn't support VREF and the codec driver gives an
         * alternative pin, set up the VREF on that pin instead
         */
        if (val == AC_PINCTL_VREF_HIZ && spec->shared_mic_vref_pin) {
                const hda_nid_t vref_pin = spec->shared_mic_vref_pin;
                unsigned int vref_val = snd_hda_get_default_vref(codec, vref_pin);
                if (vref_val != AC_PINCTL_VREF_HIZ)
                        snd_hda_set_pin_ctl_cache(codec, vref_pin,
                                                  PIN_IN | (as_mic ? vref_val : 0));
        }

        if (!spec->hp_mic_jack_modes) {
                if (as_mic)
                        val |= PIN_IN;
                else
                        val = PIN_HP;
                set_pin_target(codec, pin, val, true);
                call_hp_automute(codec, NULL);
        }
}

/* create a shared input with the headphone out */
static int create_hp_mic(struct hda_codec *codec)
{
        struct hda_gen_spec *spec = codec->spec;
        struct auto_pin_cfg *cfg = &spec->autocfg;
        unsigned int defcfg;
        hda_nid_t nid;

        if (!spec->hp_mic) {
                if (spec->suppress_hp_mic_detect)
                        return 0;
                /* automatic detection: only if no input or a single internal
                 * input pin is found, try to detect the shared hp/mic
                 */
                if (cfg->num_inputs > 1)
                        return 0;
                else if (cfg->num_inputs == 1) {
                        defcfg = snd_hda_codec_get_pincfg(codec, cfg->inputs[0].pin);
                        if (snd_hda_get_input_pin_attr(defcfg) != INPUT_PIN_ATTR_INT)
                                return 0;
                }
        }

        spec->hp_mic = 0; /* clear once */
        if (cfg->num_inputs >= AUTO_CFG_MAX_INS)
                return 0;

        nid = 0;
        if (cfg->line_out_type == AUTO_PIN_HP_OUT && cfg->line_outs > 0)
                nid = cfg->line_out_pins[0];
        else if (cfg->hp_outs > 0)
                nid = cfg->hp_pins[0];
        if (!nid)
                return 0;

        if (!(snd_hda_query_pin_caps(codec, nid) & AC_PINCAP_IN))
                return 0; /* no input */

        cfg->inputs[cfg->num_inputs].pin = nid;
        cfg->inputs[cfg->num_inputs].type = AUTO_PIN_MIC;
        cfg->inputs[cfg->num_inputs].is_headphone_mic = 1;
        cfg->num_inputs++;
        spec->hp_mic = 1;
        spec->hp_mic_pin = nid;
        /* we can't handle auto-mic together with HP-mic */
        spec->suppress_auto_mic = 1;
        snd_printdd("hda-codec: Enable shared I/O jack on NID 0x%x\n", nid);
        return 0;
}

/*
 * output jack mode
 */

static int create_hp_mic_jack_mode(struct hda_codec *codec, hda_nid_t pin);

static const char * const out_jack_texts[] = {
        "Line Out", "Headphone Out",
};

static int out_jack_mode_info(struct snd_kcontrol *kcontrol,
                              struct snd_ctl_elem_info *uinfo)
{
        return snd_hda_enum_helper_info(kcontrol, uinfo, 2, out_jack_texts);
}

static int out_jack_mode_get(struct snd_kcontrol *kcontrol,
                             struct snd_ctl_elem_value *ucontrol)
{
        struct hda_codec *codec = snd_kcontrol_chip(kcontrol);
        hda_nid_t nid = kcontrol->private_value;
        if (snd_hda_codec_get_pin_target(codec, nid) == PIN_HP)
                ucontrol->value.enumerated.item[0] = 1;
        else
                ucontrol->value.enumerated.item[0] = 0;
        return 0;
}

static int out_jack_mode_put(struct snd_kcontrol *kcontrol,
                             struct snd_ctl_elem_value *ucontrol)
{
        struct hda_codec *codec = snd_kcontrol_chip(kcontrol);
        hda_nid_t nid = kcontrol->private_value;
        unsigned int val;

        val = ucontrol->value.enumerated.item[0] ? PIN_HP : PIN_OUT;
        if (snd_hda_codec_get_pin_target(codec, nid) == val)
                return 0;
        snd_hda_set_pin_ctl_cache(codec, nid, val);
        return 1;
}

static const struct snd_kcontrol_new out_jack_mode_enum = {
        .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
        .info = out_jack_mode_info,
        .get = out_jack_mode_get,
        .put = out_jack_mode_put,
};

static bool find_kctl_name(struct hda_codec *codec, const char *name, int idx)
{
        struct hda_gen_spec *spec = codec->spec;
        int i;

        for (i = 0; i < spec->kctls.used; i++) {
                struct snd_kcontrol_new *kctl = snd_array_elem(&spec->kctls, i);
                if (!strcmp(kctl->name, name) && kctl->index == idx)
                        return true;
        }
        return false;
}

static void get_jack_mode_name(struct hda_codec *codec, hda_nid_t pin,
                               char *name, size_t name_len)
{
        struct hda_gen_spec *spec = codec->spec;
        int idx = 0;

        snd_hda_get_pin_label(codec, pin, &spec->autocfg, name, name_len, &idx);
        strlcat(name, " Jack Mode", name_len);

        for (; find_kctl_name(codec, name, idx); idx++)
                ;
}

static int get_out_jack_num_items(struct hda_codec *codec, hda_nid_t pin)
{
        struct hda_gen_spec *spec = codec->spec;
        if (spec->add_jack_modes) {
                unsigned int pincap = snd_hda_query_pin_caps(codec, pin);
                if ((pincap & AC_PINCAP_OUT) && (pincap & AC_PINCAP_HP_DRV))
                        return 2;
        }
        return 1;
}

static int create_out_jack_modes(struct hda_codec *codec, int num_pins,
                                 hda_nid_t *pins)
{
        struct hda_gen_spec *spec = codec->spec;
        int i;

        for (i = 0; i < num_pins; i++) {
                hda_nid_t pin = pins[i];
                if (pin == spec->hp_mic_pin) {
                        int ret = create_hp_mic_jack_mode(codec, pin);
                        if (ret < 0)
                                return ret;
                        continue;
                }
                if (get_out_jack_num_items(codec, pin) > 1) {
                        struct snd_kcontrol_new *knew;
                        char name[SNDRV_CTL_ELEM_ID_NAME_MAXLEN];
                        get_jack_mode_name(codec, pin, name, sizeof(name));
                        knew = snd_hda_gen_add_kctl(spec, name,
                                                    &out_jack_mode_enum);
                        if (!knew)
                                return -ENOMEM;
                        knew->private_value = pin;
                }
        }

        return 0;
}

/*
 * input jack mode
 */

/* from AC_PINCTL_VREF_HIZ to AC_PINCTL_VREF_100 */
#define NUM_VREFS       6

static const char * const vref_texts[NUM_VREFS] = {
        "Line In", "Mic 50pc Bias", "Mic 0V Bias",
        "", "Mic 80pc Bias", "Mic 100pc Bias"
};

static unsigned int get_vref_caps(struct hda_codec *codec, hda_nid_t pin)
{
        unsigned int pincap;

        pincap = snd_hda_query_pin_caps(codec, pin);
        pincap = (pincap & AC_PINCAP_VREF) >> AC_PINCAP_VREF_SHIFT;
        /* filter out unusual vrefs */
        pincap &= ~(AC_PINCAP_VREF_GRD | AC_PINCAP_VREF_100);
        return pincap;
}

/* convert from the enum item index to the vref ctl index (0=HIZ, 1=50%...) */
static int get_vref_idx(unsigned int vref_caps, unsigned int item_idx)
{
        unsigned int i, n = 0;

        for (i = 0; i < NUM_VREFS; i++) {
                if (vref_caps & (1 << i)) {
                        if (n == item_idx)
                                return i;
                        n++;
                }
        }
        return 0;
}

/* convert back from the vref ctl index to the enum item index */
static int cvt_from_vref_idx(unsigned int vref_caps, unsigned int idx)
{
        unsigned int i, n = 0;

        for (i = 0; i < NUM_VREFS; i++) {
                if (i == idx)
                        return n;
                if (vref_caps & (1 << i))
                        n++;
        }
        return 0;
}

static int in_jack_mode_info(struct snd_kcontrol *kcontrol,
                             struct snd_ctl_elem_info *uinfo)
{
        struct hda_codec *codec = snd_kcontrol_chip(kcontrol);
        hda_nid_t nid = kcontrol->private_value;
        unsigned int vref_caps = get_vref_caps(codec, nid);

        snd_hda_enum_helper_info(kcontrol, uinfo, hweight32(vref_caps),
                                 vref_texts);
        /* set the right text */
        strcpy(uinfo->value.enumerated.name,
               vref_texts[get_vref_idx(vref_caps, uinfo->value.enumerated.item)]);
        return 0;
}

static int in_jack_mode_get(struct snd_kcontrol *kcontrol,
                            struct snd_ctl_elem_value *ucontrol)
{
        struct hda_codec *codec = snd_kcontrol_chip(kcontrol);
        hda_nid_t nid = kcontrol->private_value;
        unsigned int vref_caps = get_vref_caps(codec, nid);
        unsigned int idx;

        idx = snd_hda_codec_get_pin_target(codec, nid) & AC_PINCTL_VREFEN;
        ucontrol->value.enumerated.item[0] = cvt_from_vref_idx(vref_caps, idx);
        return 0;
}

static int in_jack_mode_put(struct snd_kcontrol *kcontrol,
                            struct snd_ctl_elem_value *ucontrol)
{
        struct hda_codec *codec = snd_kcontrol_chip(kcontrol);
        hda_nid_t nid = kcontrol->private_value;
        unsigned int vref_caps = get_vref_caps(codec, nid);
        unsigned int val, idx;

        val = snd_hda_codec_get_pin_target(codec, nid);
        idx = cvt_from_vref_idx(vref_caps, val & AC_PINCTL_VREFEN);
        if (idx == ucontrol->value.enumerated.item[0])
                return 0;

        val &= ~AC_PINCTL_VREFEN;
        val |= get_vref_idx(vref_caps, ucontrol->value.enumerated.item[0]);
        snd_hda_set_pin_ctl_cache(codec, nid, val);
        return 1;
}

static const struct snd_kcontrol_new in_jack_mode_enum = {
        .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
        .info = in_jack_mode_info,
        .get = in_jack_mode_get,
        .put = in_jack_mode_put,
};

static int get_in_jack_num_items(struct hda_codec *codec, hda_nid_t pin)
{
        struct hda_gen_spec *spec = codec->spec;
        int nitems = 0;
        if (spec->add_jack_modes)
                nitems = hweight32(get_vref_caps(codec, pin));
        return nitems ? nitems : 1;
}

static int create_in_jack_mode(struct hda_codec *codec, hda_nid_t pin)
{
        struct hda_gen_spec *spec = codec->spec;
        struct snd_kcontrol_new *knew;
        char name[SNDRV_CTL_ELEM_ID_NAME_MAXLEN];
        unsigned int defcfg;

        if (pin == spec->hp_mic_pin)
                return 0; /* already done in create_out_jack_mode() */

        /* no jack mode for fixed pins */
        defcfg = snd_hda_codec_get_pincfg(codec, pin);
        if (snd_hda_get_input_pin_attr(defcfg) == INPUT_PIN_ATTR_INT)
                return 0;

        /* no multiple vref caps? */
        if (get_in_jack_num_items(codec, pin) <= 1)
                return 0;

        get_jack_mode_name(codec, pin, name, sizeof(name));
        knew = snd_hda_gen_add_kctl(spec, name, &in_jack_mode_enum);
        if (!knew)
                return -ENOMEM;
        knew->private_value = pin;
        return 0;
}

/*
 * HP/mic shared jack mode
 */
static int hp_mic_jack_mode_info(struct snd_kcontrol *kcontrol,
                                 struct snd_ctl_elem_info *uinfo)
{
        struct hda_codec *codec = snd_kcontrol_chip(kcontrol);
        hda_nid_t nid = kcontrol->private_value;
        int out_jacks = get_out_jack_num_items(codec, nid);
        int in_jacks = get_in_jack_num_items(codec, nid);
        const char *text = NULL;
        int idx;

        uinfo->type = SNDRV_CTL_ELEM_TYPE_ENUMERATED;
        uinfo->count = 1;
        uinfo->value.enumerated.items = out_jacks + in_jacks;
        if (uinfo->value.enumerated.item >= uinfo->value.enumerated.items)
                uinfo->value.enumerated.item = uinfo->value.enumerated.items - 1;
        idx = uinfo->value.enumerated.item;
        if (idx < out_jacks) {
                if (out_jacks > 1)
                        text = out_jack_texts[idx];
                else
                        text = "Headphone Out";
        } else {
                idx -= out_jacks;
                if (in_jacks > 1) {
                        unsigned int vref_caps = get_vref_caps(codec, nid);
                        text = vref_texts[get_vref_idx(vref_caps, idx)];
                } else
                        text = "Mic In";
        }

        strcpy(uinfo->value.enumerated.name, text);
        return 0;
}

static int get_cur_hp_mic_jack_mode(struct hda_codec *codec, hda_nid_t nid)
{
        int out_jacks = get_out_jack_num_items(codec, nid);
        int in_jacks = get_in_jack_num_items(codec, nid);
        unsigned int val = snd_hda_codec_get_pin_target(codec, nid);
        int idx = 0;

        if (val & PIN_OUT) {
                if (out_jacks > 1 && val == PIN_HP)
                        idx = 1;
        } else if (val & PIN_IN) {
                idx = out_jacks;
                if (in_jacks > 1) {
                        unsigned int vref_caps = get_vref_caps(codec, nid);
                        val &= AC_PINCTL_VREFEN;
                        idx += cvt_from_vref_idx(vref_caps, val);
                }
        }
        return idx;
}

static int hp_mic_jack_mode_get(struct snd_kcontrol *kcontrol,
                                struct snd_ctl_elem_value *ucontrol)
{
        struct hda_codec *codec = snd_kcontrol_chip(kcontrol);
        hda_nid_t nid = kcontrol->private_value;
        ucontrol->value.enumerated.item[0] =
                get_cur_hp_mic_jack_mode(codec, nid);
        return 0;
}

static int hp_mic_jack_mode_put(struct snd_kcontrol *kcontrol,
                                struct snd_ctl_elem_value *ucontrol)
{
        struct hda_codec *codec = snd_kcontrol_chip(kcontrol);
        hda_nid_t nid = kcontrol->private_value;
        int out_jacks = get_out_jack_num_items(codec, nid);
        int in_jacks = get_in_jack_num_items(codec, nid);
        unsigned int val, oldval, idx;

        oldval = get_cur_hp_mic_jack_mode(codec, nid);
        idx = ucontrol->value.enumerated.item[0];
        if (oldval == idx)
                return 0;

        if (idx < out_jacks) {
                if (out_jacks > 1)
                        val = idx ? PIN_HP : PIN_OUT;
                else
                        val = PIN_HP;
        } else {
                idx -= out_jacks;
                if (in_jacks > 1) {
                        unsigned int vref_caps = get_vref_caps(codec, nid);
                        val = snd_hda_codec_get_pin_target(codec, nid);
                        val &= ~(AC_PINCTL_VREFEN | PIN_HP);
                        val |= get_vref_idx(vref_caps, idx) | PIN_IN;
                } else
                        val = snd_hda_get_default_vref(codec, nid);
        }
        snd_hda_set_pin_ctl_cache(codec, nid, val);
        call_hp_automute(codec, NULL);

        return 1;
}

static const struct snd_kcontrol_new hp_mic_jack_mode_enum = {
        .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
        .info = hp_mic_jack_mode_info,
        .get = hp_mic_jack_mode_get,
        .put = hp_mic_jack_mode_put,
};

static int create_hp_mic_jack_mode(struct hda_codec *codec, hda_nid_t pin)
{
        struct hda_gen_spec *spec = codec->spec;
        struct snd_kcontrol_new *knew;

        if (get_out_jack_num_items(codec, pin) <= 1 &&
            get_in_jack_num_items(codec, pin) <= 1)
                return 0; /* no need */
        knew = snd_hda_gen_add_kctl(spec, "Headphone Mic Jack Mode",
                                    &hp_mic_jack_mode_enum);
        if (!knew)
                return -ENOMEM;
        knew->private_value = pin;
        spec->hp_mic_jack_modes = 1;
        return 0;
}

/*
 * Parse input paths
 */

/* add the powersave loopback-list entry */
static int add_loopback_list(struct hda_gen_spec *spec, hda_nid_t mix, int idx)
{
        struct hda_amp_list *list;

        list = snd_array_new(&spec->loopback_list);
        if (!list)
                return -ENOMEM;
        list->nid = mix;
        list->dir = HDA_INPUT;
        list->idx = idx;
        spec->loopback.amplist = spec->loopback_list.list;
        return 0;
}

/* create input playback/capture controls for the given pin */
static int new_analog_input(struct hda_codec *codec, int input_idx,
                            hda_nid_t pin, const char *ctlname, int ctlidx,
                            hda_nid_t mix_nid)
{
        struct hda_gen_spec *spec = codec->spec;
        struct nid_path *path;
        unsigned int val;
        int err, idx;

        if (!nid_has_volume(codec, mix_nid, HDA_INPUT) &&
            !nid_has_mute(codec, mix_nid, HDA_INPUT))
                return 0; /* no need for analog loopback */

        path = snd_hda_add_new_path(codec, pin, mix_nid, 0);
        if (!path)
                return -EINVAL;
        print_nid_path("loopback", path);
        spec->loopback_paths[input_idx] = snd_hda_get_path_idx(codec, path);

        idx = path->idx[path->depth - 1];
        if (nid_has_volume(codec, mix_nid, HDA_INPUT)) {
                val = HDA_COMPOSE_AMP_VAL(mix_nid, 3, idx, HDA_INPUT);
                err = __add_pb_vol_ctrl(spec, HDA_CTL_WIDGET_VOL, ctlname, ctlidx, val);
                if (err < 0)
                        return err;
                path->ctls[NID_PATH_VOL_CTL] = val;
        }

        if (nid_has_mute(codec, mix_nid, HDA_INPUT)) {
                val = HDA_COMPOSE_AMP_VAL(mix_nid, 3, idx, HDA_INPUT);
                err = __add_pb_sw_ctrl(spec, HDA_CTL_WIDGET_MUTE, ctlname, ctlidx, val);
                if (err < 0)
                        return err;
                path->ctls[NID_PATH_MUTE_CTL] = val;
        }

        path->active = true;
        err = add_loopback_list(spec, mix_nid, idx);
        if (err < 0)
                return err;

        if (spec->mixer_nid != spec->mixer_merge_nid &&
            !spec->loopback_merge_path) {
                path = snd_hda_add_new_path(codec, spec->mixer_nid,
                                            spec->mixer_merge_nid, 0);
                if (path) {
                        print_nid_path("loopback-merge", path);
                        path->active = true;
                        spec->loopback_merge_path =
                                snd_hda_get_path_idx(codec, path);
                }
        }

        return 0;
}

static int is_input_pin(struct hda_codec *codec, hda_nid_t nid)
{
        unsigned int pincap = snd_hda_query_pin_caps(codec, nid);
        return (pincap & AC_PINCAP_IN) != 0;
}

/* Parse the codec tree and retrieve ADCs */
static int fill_adc_nids(struct hda_codec *codec)
{
        struct hda_gen_spec *spec = codec->spec;
        hda_nid_t nid;
        hda_nid_t *adc_nids = spec->adc_nids;
        int max_nums = ARRAY_SIZE(spec->adc_nids);
        int i, nums = 0;

        nid = codec->start_nid;
        for (i = 0; i < codec->num_nodes; i++, nid++) {
                unsigned int caps = get_wcaps(codec, nid);
                int type = get_wcaps_type(caps);

                if (type != AC_WID_AUD_IN || (caps & AC_WCAP_DIGITAL))
                        continue;
                adc_nids[nums] = nid;
                if (++nums >= max_nums)
                        break;
        }
        spec->num_adc_nids = nums;

        /* copy the detected ADCs to all_adcs[] */
        spec->num_all_adcs = nums;
        memcpy(spec->all_adcs, spec->adc_nids, nums * sizeof(hda_nid_t));

        return nums;
}

/* filter out invalid adc_nids that don't give all active input pins;
 * if needed, check whether dynamic ADC-switching is available
 */
static int check_dyn_adc_switch(struct hda_codec *codec)
{
        struct hda_gen_spec *spec = codec->spec;
        struct hda_input_mux *imux = &spec->input_mux;
        unsigned int ok_bits;
        int i, n, nums;

        nums = 0;
        ok_bits = 0;
        for (n = 0; n < spec->num_adc_nids; n++) {
                for (i = 0; i < imux->num_items; i++) {
                        if (!spec->input_paths[i][n])
                                break;
                }
                if (i >= imux->num_items) {
                        ok_bits |= (1 << n);
                        nums++;
                }
        }

        if (!ok_bits) {
                /* check whether ADC-switch is possible */
                for (i = 0; i < imux->num_items; i++) {
                        for (n = 0; n < spec->num_adc_nids; n++) {
                                if (spec->input_paths[i][n]) {
                                        spec->dyn_adc_idx[i] = n;
                                        break;
                                }
                        }
                }

                snd_printdd("hda-codec: enabling ADC switching\n");
                spec->dyn_adc_switch = 1;
        } else if (nums != spec->num_adc_nids) {
                /* shrink the invalid adcs and input paths */
                nums = 0;
                for (n = 0; n < spec->num_adc_nids; n++) {
                        if (!(ok_bits & (1 << n)))
                                continue;
                        if (n != nums) {
                                spec->adc_nids[nums] = spec->adc_nids[n];
                                for (i = 0; i < imux->num_items; i++) {
                                        invalidate_nid_path(codec,
                                                spec->input_paths[i][nums]);
                                        spec->input_paths[i][nums] =
                                                spec->input_paths[i][n];
                                }
                        }
                        nums++;
                }
                spec->num_adc_nids = nums;
        }

        if (imux->num_items == 1 ||
            (imux->num_items == 2 && spec->hp_mic)) {
                snd_printdd("hda-codec: reducing to a single ADC\n");
                spec->num_adc_nids = 1; /* reduce to a single ADC */
        }

        /* single index for individual volumes ctls */
        if (!spec->dyn_adc_switch && spec->multi_cap_vol)
                spec->num_adc_nids = 1;

        return 0;
}

/* parse capture source paths from the given pin and create imux items */
static int parse_capture_source(struct hda_codec *codec, hda_nid_t pin,
                                int cfg_idx, int num_adcs,
                                const char *label, int anchor)
{
        struct hda_gen_spec *spec = codec->spec;
        struct hda_input_mux *imux = &spec->input_mux;
        int imux_idx = imux->num_items;
        bool imux_added = false;
        int c;

        for (c = 0; c < num_adcs; c++) {
                struct nid_path *path;
                hda_nid_t adc = spec->adc_nids[c];

                if (!is_reachable_path(codec, pin, adc))
                        continue;
                path = snd_hda_add_new_path(codec, pin, adc, anchor);
                if (!path)
                        continue;
                print_nid_path("input", path);
                spec->input_paths[imux_idx][c] =
                        snd_hda_get_path_idx(codec, path);

                if (!imux_added) {
                        if (spec->hp_mic_pin == pin)
                                spec->hp_mic_mux_idx = imux->num_items;
                        spec->imux_pins[imux->num_items] = pin;
                        snd_hda_add_imux_item(imux, label, cfg_idx, NULL);
                        imux_added = true;
                }
        }

        return 0;
}

/*
 * create playback/capture controls for input pins
 */

/* fill the label for each input at first */
static int fill_input_pin_labels(struct hda_codec *codec)
{
        struct hda_gen_spec *spec = codec->spec;
        const struct auto_pin_cfg *cfg = &spec->autocfg;
        int i;

        for (i = 0; i < cfg->num_inputs; i++) {
                hda_nid_t pin = cfg->inputs[i].pin;
                const char *label;
                int j, idx;