// SPDX-License-Identifier: GPL-2.0-or-later
/*
 *
 *  patch_hdmi.c - routines for HDMI/DisplayPort codecs
 *
 *  Copyright(c) 2008-2010 Intel Corporation. All rights reserved.
 *  Copyright (c) 2006 ATI Technologies Inc.
 *  Copyright (c) 2008 NVIDIA Corp.  All rights reserved.
 *  Copyright (c) 2008 Wei Ni <wni@nvidia.com>
 *  Copyright (c) 2013 Anssi Hannula <anssi.hannula@iki.fi>
 *
 *  Authors:
 *                      Wu Fengguang <wfg@linux.intel.com>
 *
 *  Maintained by:
 *                      Wu Fengguang <wfg@linux.intel.com>
 */

#include <linux/init.h>
#include <linux/delay.h>
#include <linux/pci.h>
#include <linux/slab.h>
#include <linux/module.h>
#include <linux/pm_runtime.h>
#include <sound/core.h>
#include <sound/jack.h>
#include <sound/asoundef.h>
#include <sound/tlv.h>
#include <sound/hdaudio.h>
#include <sound/hda_i915.h>
#include <sound/hda_chmap.h>
#include <sound/hda_codec.h>
#include "hda_local.h"
#include "hda_jack.h"
#include "hda_controller.h"

static bool static_hdmi_pcm;
module_param(static_hdmi_pcm, bool, 0644);
MODULE_PARM_DESC(static_hdmi_pcm, "Don't restrict PCM parameters per ELD info");

static bool enable_acomp = true;
module_param(enable_acomp, bool, 0444);
MODULE_PARM_DESC(enable_acomp, "Enable audio component binding (default=yes)");

static bool enable_silent_stream =
IS_ENABLED(CONFIG_SND_HDA_INTEL_HDMI_SILENT_STREAM);
module_param(enable_silent_stream, bool, 0644);
MODULE_PARM_DESC(enable_silent_stream, "Enable Silent Stream for HDMI devices");

static bool enable_all_pins;
module_param(enable_all_pins, bool, 0444);
MODULE_PARM_DESC(enable_all_pins, "Forcibly enable all pins");

struct hdmi_spec_per_cvt {
        hda_nid_t cvt_nid;
        int assigned;
        unsigned int channels_min;
        unsigned int channels_max;
        u32 rates;
        u64 formats;
        unsigned int maxbps;
};

/* max. connections to a widget */
#define HDA_MAX_CONNECTIONS     32

struct hdmi_spec_per_pin {
        hda_nid_t pin_nid;
        int dev_id;
        /* pin idx, different device entries on the same pin use the same idx */
        int pin_nid_idx;
        int num_mux_nids;
        hda_nid_t mux_nids[HDA_MAX_CONNECTIONS];
        int mux_idx;
        hda_nid_t cvt_nid;

        struct hda_codec *codec;
        struct hdmi_eld sink_eld;
        struct mutex lock;
        struct delayed_work work;
        struct hdmi_pcm *pcm; /* pointer to spec->pcm_rec[n] dynamically*/
        int pcm_idx; /* which pcm is attached. -1 means no pcm is attached */
        int repoll_count;
        bool setup; /* the stream has been set up by prepare callback */
        bool silent_stream;
        int channels; /* current number of channels */
        bool non_pcm;
        bool chmap_set;         /* channel-map override by ALSA API? */
        unsigned char chmap[8]; /* ALSA API channel-map */
#ifdef CONFIG_SND_PROC_FS
        struct snd_info_entry *proc_entry;
#endif
};

/* operations used by generic code that can be overridden by patches */
struct hdmi_ops {
        int (*pin_get_eld)(struct hda_codec *codec, hda_nid_t pin_nid,
                           int dev_id, unsigned char *buf, int *eld_size);

        void (*pin_setup_infoframe)(struct hda_codec *codec, hda_nid_t pin_nid,
                                    int dev_id,
                                    int ca, int active_channels, int conn_type);

        /* enable/disable HBR (HD passthrough) */
        int (*pin_hbr_setup)(struct hda_codec *codec, hda_nid_t pin_nid,
                             int dev_id, bool hbr);

        int (*setup_stream)(struct hda_codec *codec, hda_nid_t cvt_nid,
                            hda_nid_t pin_nid, int dev_id, u32 stream_tag,
                            int format);

        void (*pin_cvt_fixup)(struct hda_codec *codec,
                              struct hdmi_spec_per_pin *per_pin,
                              hda_nid_t cvt_nid);
};

struct hdmi_pcm {
        struct hda_pcm *pcm;
        struct snd_jack *jack;
        struct snd_kcontrol *eld_ctl;
};

struct hdmi_spec {
        struct hda_codec *codec;
        int num_cvts;
        struct snd_array cvts; /* struct hdmi_spec_per_cvt */
        hda_nid_t cvt_nids[4]; /* only for haswell fix */

        /*
         * num_pins is the number of virtual pins
         * for example, there are 3 pins, and each pin
         * has 4 device entries, then the num_pins is 12
         */
        int num_pins;
        /*
         * num_nids is the number of real pins
         * In the above example, num_nids is 3
         */
        int num_nids;
        /*
         * dev_num is the number of device entries
         * on each pin.
         * In the above example, dev_num is 4
         */
        int dev_num;
        struct snd_array pins; /* struct hdmi_spec_per_pin */
        struct hdmi_pcm pcm_rec[16];
        struct mutex pcm_lock;
        struct mutex bind_lock; /* for audio component binding */
        /* pcm_bitmap means which pcms have been assigned to pins*/
        unsigned long pcm_bitmap;
        int pcm_used;   /* counter of pcm_rec[] */
        /* bitmap shows whether the pcm is opened in user space
         * bit 0 means the first playback PCM (PCM3);
         * bit 1 means the second playback PCM, and so on.
         */
        unsigned long pcm_in_use;

        struct hdmi_eld temp_eld;
        struct hdmi_ops ops;

        bool dyn_pin_out;
        bool dyn_pcm_assign;
        bool dyn_pcm_no_legacy;
        bool intel_hsw_fixup;   /* apply Intel platform-specific fixups */
        /*
         * Non-generic VIA/NVIDIA specific
         */
        struct hda_multi_out multiout;
        struct hda_pcm_stream pcm_playback;

        bool use_acomp_notifier; /* use eld_notify callback for hotplug */
        bool acomp_registered; /* audio component registered in this driver */
        bool force_connect; /* force connectivity */
        struct drm_audio_component_audio_ops drm_audio_ops;
        int (*port2pin)(struct hda_codec *, int); /* reverse port/pin mapping */

        struct hdac_chmap chmap;
        hda_nid_t vendor_nid;
        const int *port_map;
        int port_num;
        bool send_silent_stream; /* Flag to enable silent stream feature */
};

#ifdef CONFIG_SND_HDA_COMPONENT
static inline bool codec_has_acomp(struct hda_codec *codec)
{
        struct hdmi_spec *spec = codec->spec;
        return spec->use_acomp_notifier;
}
#else
#define codec_has_acomp(codec)  false
#endif

struct hdmi_audio_infoframe {
        u8 type; /* 0x84 */
        u8 ver;  /* 0x01 */
        u8 len;  /* 0x0a */

        u8 checksum;

        u8 CC02_CT47;   /* CC in bits 0:2, CT in 4:7 */
        u8 SS01_SF24;
        u8 CXT04;
        u8 CA;
        u8 LFEPBL01_LSV36_DM_INH7;
};

struct dp_audio_infoframe {
        u8 type; /* 0x84 */
        u8 len;  /* 0x1b */
        u8 ver;  /* 0x11 << 2 */

        u8 CC02_CT47;   /* match with HDMI infoframe from this on */
        u8 SS01_SF24;
        u8 CXT04;
        u8 CA;
        u8 LFEPBL01_LSV36_DM_INH7;
};

union audio_infoframe {
        struct hdmi_audio_infoframe hdmi;
        struct dp_audio_infoframe dp;
        u8 bytes[0];
};

/*
 * HDMI routines
 */

#define get_pin(spec, idx) \
        ((struct hdmi_spec_per_pin *)snd_array_elem(&spec->pins, idx))
#define get_cvt(spec, idx) \
        ((struct hdmi_spec_per_cvt  *)snd_array_elem(&spec->cvts, idx))
/* obtain hdmi_pcm object assigned to idx */
#define get_hdmi_pcm(spec, idx) (&(spec)->pcm_rec[idx])
/* obtain hda_pcm object assigned to idx */
#define get_pcm_rec(spec, idx)  (get_hdmi_pcm(spec, idx)->pcm)

static int pin_id_to_pin_index(struct hda_codec *codec,
                               hda_nid_t pin_nid, int dev_id)
{
        struct hdmi_spec *spec = codec->spec;
        int pin_idx;
        struct hdmi_spec_per_pin *per_pin;

        /*
         * (dev_id == -1) means it is NON-MST pin
         * return the first virtual pin on this port
         */
        if (dev_id == -1)
                dev_id = 0;

        for (pin_idx = 0; pin_idx < spec->num_pins; pin_idx++) {
                per_pin = get_pin(spec, pin_idx);
                if ((per_pin->pin_nid == pin_nid) &&
                        (per_pin->dev_id == dev_id))
                        return pin_idx;
        }

        codec_warn(codec, "HDMI: pin NID 0x%x not registered\n", pin_nid);
        return -EINVAL;
}

static int hinfo_to_pcm_index(struct hda_codec *codec,
                        struct hda_pcm_stream *hinfo)
{
        struct hdmi_spec *spec = codec->spec;
        int pcm_idx;

        for (pcm_idx = 0; pcm_idx < spec->pcm_used; pcm_idx++)
                if (get_pcm_rec(spec, pcm_idx)->stream == hinfo)
                        return pcm_idx;

        codec_warn(codec, "HDMI: hinfo %p not tied to a PCM\n", hinfo);
        return -EINVAL;
}

static int hinfo_to_pin_index(struct hda_codec *codec,
                              struct hda_pcm_stream *hinfo)
{
        struct hdmi_spec *spec = codec->spec;
        struct hdmi_spec_per_pin *per_pin;
        int pin_idx;

        for (pin_idx = 0; pin_idx < spec->num_pins; pin_idx++) {
                per_pin = get_pin(spec, pin_idx);
                if (per_pin->pcm &&
                        per_pin->pcm->pcm->stream == hinfo)
                        return pin_idx;
        }

        codec_dbg(codec, "HDMI: hinfo %p (pcm %d) not registered\n", hinfo,
                  hinfo_to_pcm_index(codec, hinfo));
        return -EINVAL;
}

static struct hdmi_spec_per_pin *pcm_idx_to_pin(struct hdmi_spec *spec,
                                                int pcm_idx)
{
        int i;
        struct hdmi_spec_per_pin *per_pin;

        for (i = 0; i < spec->num_pins; i++) {
                per_pin = get_pin(spec, i);
                if (per_pin->pcm_idx == pcm_idx)
                        return per_pin;
        }
        return NULL;
}

static int cvt_nid_to_cvt_index(struct hda_codec *codec, hda_nid_t cvt_nid)
{
        struct hdmi_spec *spec = codec->spec;
        int cvt_idx;

        for (cvt_idx = 0; cvt_idx < spec->num_cvts; cvt_idx++)
                if (get_cvt(spec, cvt_idx)->cvt_nid == cvt_nid)
                        return cvt_idx;

        codec_warn(codec, "HDMI: cvt NID 0x%x not registered\n", cvt_nid);
        return -EINVAL;
}

static int hdmi_eld_ctl_info(struct snd_kcontrol *kcontrol,
                        struct snd_ctl_elem_info *uinfo)
{
        struct hda_codec *codec = snd_kcontrol_chip(kcontrol);
        struct hdmi_spec *spec = codec->spec;
        struct hdmi_spec_per_pin *per_pin;
        struct hdmi_eld *eld;
        int pcm_idx;

        uinfo->type = SNDRV_CTL_ELEM_TYPE_BYTES;

        pcm_idx = kcontrol->private_value;
        mutex_lock(&spec->pcm_lock);
        per_pin = pcm_idx_to_pin(spec, pcm_idx);
        if (!per_pin) {
                /* no pin is bound to the pcm */
                uinfo->count = 0;
                goto unlock;
        }
        eld = &per_pin->sink_eld;
        uinfo->count = eld->eld_valid ? eld->eld_size : 0;

 unlock:
        mutex_unlock(&spec->pcm_lock);
        return 0;
}

static int hdmi_eld_ctl_get(struct snd_kcontrol *kcontrol,
                        struct snd_ctl_elem_value *ucontrol)
{
        struct hda_codec *codec = snd_kcontrol_chip(kcontrol);
        struct hdmi_spec *spec = codec->spec;
        struct hdmi_spec_per_pin *per_pin;
        struct hdmi_eld *eld;
        int pcm_idx;
        int err = 0;

        pcm_idx = kcontrol->private_value;
        mutex_lock(&spec->pcm_lock);
        per_pin = pcm_idx_to_pin(spec, pcm_idx);
        if (!per_pin) {
                /* no pin is bound to the pcm */
                memset(ucontrol->value.bytes.data, 0,
                       ARRAY_SIZE(ucontrol->value.bytes.data));
                goto unlock;
        }

        eld = &per_pin->sink_eld;
        if (eld->eld_size > ARRAY_SIZE(ucontrol->value.bytes.data) ||
            eld->eld_size > ELD_MAX_SIZE) {
                snd_BUG();
                err = -EINVAL;
                goto unlock;
        }

        memset(ucontrol->value.bytes.data, 0,
               ARRAY_SIZE(ucontrol->value.bytes.data));
        if (eld->eld_valid)
                memcpy(ucontrol->value.bytes.data, eld->eld_buffer,
                       eld->eld_size);

 unlock:
        mutex_unlock(&spec->pcm_lock);
        return err;
}

static const struct snd_kcontrol_new eld_bytes_ctl = {
        .access = SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE |
                SNDRV_CTL_ELEM_ACCESS_SKIP_CHECK,
        .iface = SNDRV_CTL_ELEM_IFACE_PCM,
        .name = "ELD",
        .info = hdmi_eld_ctl_info,
        .get = hdmi_eld_ctl_get,
};

static int hdmi_create_eld_ctl(struct hda_codec *codec, int pcm_idx,
                        int device)
{
        struct snd_kcontrol *kctl;
        struct hdmi_spec *spec = codec->spec;
        int err;

        kctl = snd_ctl_new1(&eld_bytes_ctl, codec);
        if (!kctl)
                return -ENOMEM;
        kctl->private_value = pcm_idx;
        kctl->id.device = device;

        /* no pin nid is associated with the kctl now
         * tbd: associate pin nid to eld ctl later
         */
        err = snd_hda_ctl_add(codec, 0, kctl);
        if (err < 0)
                return err;

        get_hdmi_pcm(spec, pcm_idx)->eld_ctl = kctl;
        return 0;
}

#ifdef BE_PARANOID
static void hdmi_get_dip_index(struct hda_codec *codec, hda_nid_t pin_nid,
                                int *packet_index, int *byte_index)
{
        int val;

        val = snd_hda_codec_read(codec, pin_nid, 0,
                                 AC_VERB_GET_HDMI_DIP_INDEX, 0);

        *packet_index = val >> 5;
        *byte_index = val & 0x1f;
}
#endif

static void hdmi_set_dip_index(struct hda_codec *codec, hda_nid_t pin_nid,
                                int packet_index, int byte_index)
{
        int val;

        val = (packet_index << 5) | (byte_index & 0x1f);

        snd_hda_codec_write(codec, pin_nid, 0, AC_VERB_SET_HDMI_DIP_INDEX, val);
}

static void hdmi_write_dip_byte(struct hda_codec *codec, hda_nid_t pin_nid,
                                unsigned char val)
{
        snd_hda_codec_write(codec, pin_nid, 0, AC_VERB_SET_HDMI_DIP_DATA, val);
}

static void hdmi_init_pin(struct hda_codec *codec, hda_nid_t pin_nid)
{
        struct hdmi_spec *spec = codec->spec;
        int pin_out;

        /* Unmute */
        if (get_wcaps(codec, pin_nid) & AC_WCAP_OUT_AMP)
                snd_hda_codec_write(codec, pin_nid, 0,
                                AC_VERB_SET_AMP_GAIN_MUTE, AMP_OUT_UNMUTE);

        if (spec->dyn_pin_out)
                /* Disable pin out until stream is active */
                pin_out = 0;
        else
                /* Enable pin out: some machines with GM965 gets broken output
                 * when the pin is disabled or changed while using with HDMI
                 */
                pin_out = PIN_OUT;

        snd_hda_codec_write(codec, pin_nid, 0,
                            AC_VERB_SET_PIN_WIDGET_CONTROL, pin_out);
}

/*
 * ELD proc files
 */

#ifdef CONFIG_SND_PROC_FS
static void print_eld_info(struct snd_info_entry *entry,
                           struct snd_info_buffer *buffer)
{
        struct hdmi_spec_per_pin *per_pin = entry->private_data;

        mutex_lock(&per_pin->lock);
        snd_hdmi_print_eld_info(&per_pin->sink_eld, buffer);
        mutex_unlock(&per_pin->lock);
}

static void write_eld_info(struct snd_info_entry *entry,
                           struct snd_info_buffer *buffer)
{
        struct hdmi_spec_per_pin *per_pin = entry->private_data;

        mutex_lock(&per_pin->lock);
        snd_hdmi_write_eld_info(&per_pin->sink_eld, buffer);
        mutex_unlock(&per_pin->lock);
}

static int eld_proc_new(struct hdmi_spec_per_pin *per_pin, int index)
{
        char name[32];
        struct hda_codec *codec = per_pin->codec;
        struct snd_info_entry *entry;
        int err;

        snprintf(name, sizeof(name), "eld#%d.%d", codec->addr, index);
        err = snd_card_proc_new(codec->card, name, &entry);
        if (err < 0)
                return err;

        snd_info_set_text_ops(entry, per_pin, print_eld_info);
        entry->c.text.write = write_eld_info;
        entry->mode |= 0200;
        per_pin->proc_entry = entry;

        return 0;
}

static void eld_proc_free(struct hdmi_spec_per_pin *per_pin)
{
        if (!per_pin->codec->bus->shutdown) {
                snd_info_free_entry(per_pin->proc_entry);
                per_pin->proc_entry = NULL;
        }
}
#else
static inline int eld_proc_new(struct hdmi_spec_per_pin *per_pin,
                               int index)
{
        return 0;
}
static inline void eld_proc_free(struct hdmi_spec_per_pin *per_pin)
{
}
#endif

/*
 * Audio InfoFrame routines
 */

/*
 * Enable Audio InfoFrame Transmission
 */
static void hdmi_start_infoframe_trans(struct hda_codec *codec,
                                       hda_nid_t pin_nid)
{
        hdmi_set_dip_index(codec, pin_nid, 0x0, 0x0);
        snd_hda_codec_write(codec, pin_nid, 0, AC_VERB_SET_HDMI_DIP_XMIT,
                                                AC_DIPXMIT_BEST);
}

/*
 * Disable Audio InfoFrame Transmission
 */
static void hdmi_stop_infoframe_trans(struct hda_codec *codec,
                                      hda_nid_t pin_nid)
{
        hdmi_set_dip_index(codec, pin_nid, 0x0, 0x0);
        snd_hda_codec_write(codec, pin_nid, 0, AC_VERB_SET_HDMI_DIP_XMIT,
                                                AC_DIPXMIT_DISABLE);
}

static void hdmi_debug_dip_size(struct hda_codec *codec, hda_nid_t pin_nid)
{
#ifdef CONFIG_SND_DEBUG_VERBOSE
        int i;
        int size;

        size = snd_hdmi_get_eld_size(codec, pin_nid);
        codec_dbg(codec, "HDMI: ELD buf size is %d\n", size);

        for (i = 0; i < 8; i++) {
                size = snd_hda_codec_read(codec, pin_nid, 0,
                                                AC_VERB_GET_HDMI_DIP_SIZE, i);
                codec_dbg(codec, "HDMI: DIP GP[%d] buf size is %d\n", i, size);
        }
#endif
}

static void hdmi_clear_dip_buffers(struct hda_codec *codec, hda_nid_t pin_nid)
{
#ifdef BE_PARANOID
        int i, j;
        int size;
        int pi, bi;
        for (i = 0; i < 8; i++) {
                size = snd_hda_codec_read(codec, pin_nid, 0,
                                                AC_VERB_GET_HDMI_DIP_SIZE, i);
                if (size == 0)
                        continue;

                hdmi_set_dip_index(codec, pin_nid, i, 0x0);
                for (j = 1; j < 1000; j++) {
                        hdmi_write_dip_byte(codec, pin_nid, 0x0);
                        hdmi_get_dip_index(codec, pin_nid, &pi, &bi);
                        if (pi != i)
                                codec_dbg(codec, "dip index %d: %d != %d\n",
                                                bi, pi, i);
                        if (bi == 0) /* byte index wrapped around */
                                break;
                }
                codec_dbg(codec,
                        "HDMI: DIP GP[%d] buf reported size=%d, written=%d\n",
                        i, size, j);
        }
#endif
}

static void hdmi_checksum_audio_infoframe(struct hdmi_audio_infoframe *hdmi_ai)
{
        u8 *bytes = (u8 *)hdmi_ai;
        u8 sum = 0;
        int i;

        hdmi_ai->checksum = 0;

        for (i = 0; i < sizeof(*hdmi_ai); i++)
                sum += bytes[i];

        hdmi_ai->checksum = -sum;
}

static void hdmi_fill_audio_infoframe(struct hda_codec *codec,
                                      hda_nid_t pin_nid,
                                      u8 *dip, int size)
{
        int i;

        hdmi_debug_dip_size(codec, pin_nid);
        hdmi_clear_dip_buffers(codec, pin_nid); /* be paranoid */

        hdmi_set_dip_index(codec, pin_nid, 0x0, 0x0);
        for (i = 0; i < size; i++)
                hdmi_write_dip_byte(codec, pin_nid, dip[i]);
}

static bool hdmi_infoframe_uptodate(struct hda_codec *codec, hda_nid_t pin_nid,
                                    u8 *dip, int size)
{
        u8 val;
        int i;

        hdmi_set_dip_index(codec, pin_nid, 0x0, 0x0);
        if (snd_hda_codec_read(codec, pin_nid, 0, AC_VERB_GET_HDMI_DIP_XMIT, 0)
                                                            != AC_DIPXMIT_BEST)
                return false;

        for (i = 0; i < size; i++) {
                val = snd_hda_codec_read(codec, pin_nid, 0,
                                         AC_VERB_GET_HDMI_DIP_DATA, 0);
                if (val != dip[i])
                        return false;
        }

        return true;
}

static int hdmi_pin_get_eld(struct hda_codec *codec, hda_nid_t nid,
                            int dev_id, unsigned char *buf, int *eld_size)
{
        snd_hda_set_dev_select(codec, nid, dev_id);

        return snd_hdmi_get_eld(codec, nid, buf, eld_size);
}

static void hdmi_pin_setup_infoframe(struct hda_codec *codec,
                                     hda_nid_t pin_nid, int dev_id,
                                     int ca, int active_channels,
                                     int conn_type)
{
        union audio_infoframe ai;

        memset(&ai, 0, sizeof(ai));
        if (conn_type == 0) { /* HDMI */
                struct hdmi_audio_infoframe *hdmi_ai = &ai.hdmi;

                hdmi_ai->type           = 0x84;
                hdmi_ai->ver            = 0x01;
                hdmi_ai->len            = 0x0a;
                hdmi_ai->CC02_CT47      = active_channels - 1;
                hdmi_ai->CA             = ca;
                hdmi_checksum_audio_infoframe(hdmi_ai);
        } else if (conn_type == 1) { /* DisplayPort */
                struct dp_audio_infoframe *dp_ai = &ai.dp;

                dp_ai->type             = 0x84;
                dp_ai->len              = 0x1b;
                dp_ai->ver              = 0x11 << 2;
                dp_ai->CC02_CT47        = active_channels - 1;
                dp_ai->CA               = ca;
        } else {
                codec_dbg(codec, "HDMI: unknown connection type at pin NID 0x%x\n", pin_nid);
                return;
        }

        snd_hda_set_dev_select(codec, pin_nid, dev_id);

        /*
         * sizeof(ai) is used instead of sizeof(*hdmi_ai) or
         * sizeof(*dp_ai) to avoid partial match/update problems when
         * the user switches between HDMI/DP monitors.
         */
        if (!hdmi_infoframe_uptodate(codec, pin_nid, ai.bytes,
                                        sizeof(ai))) {
                codec_dbg(codec, "%s: pin NID=0x%x channels=%d ca=0x%02x\n",
                          __func__, pin_nid, active_channels, ca);
                hdmi_stop_infoframe_trans(codec, pin_nid);
                hdmi_fill_audio_infoframe(codec, pin_nid,
                                            ai.bytes, sizeof(ai));
                hdmi_start_infoframe_trans(codec, pin_nid);
        }
}

static void hdmi_setup_audio_infoframe(struct hda_codec *codec,
                                       struct hdmi_spec_per_pin *per_pin,
                                       bool non_pcm)
{
        struct hdmi_spec *spec = codec->spec;
        struct hdac_chmap *chmap = &spec->chmap;
        hda_nid_t pin_nid = per_pin->pin_nid;
        int dev_id = per_pin->dev_id;
        int channels = per_pin->channels;
        int active_channels;
        struct hdmi_eld *eld;
        int ca;

        if (!channels)
                return;

        snd_hda_set_dev_select(codec, pin_nid, dev_id);

        /* some HW (e.g. HSW+) needs reprogramming the amp at each time */
        if (get_wcaps(codec, pin_nid) & AC_WCAP_OUT_AMP)
                snd_hda_codec_write(codec, pin_nid, 0,
                                            AC_VERB_SET_AMP_GAIN_MUTE,
                                            AMP_OUT_UNMUTE);

        eld = &per_pin->sink_eld;

        ca = snd_hdac_channel_allocation(&codec->core,
                        eld->info.spk_alloc, channels,
                        per_pin->chmap_set, non_pcm, per_pin->chmap);

        active_channels = snd_hdac_get_active_channels(ca);

        chmap->ops.set_channel_count(&codec->core, per_pin->cvt_nid,
                                                active_channels);

        /*
         * always configure channel mapping, it may have been changed by the
         * user in the meantime
         */
        snd_hdac_setup_channel_mapping(&spec->chmap,
                                pin_nid, non_pcm, ca, channels,
                                per_pin->chmap, per_pin->chmap_set);

        spec->ops.pin_setup_infoframe(codec, pin_nid, dev_id,
                                      ca, active_channels, eld->info.conn_type);

        per_pin->non_pcm = non_pcm;
}

/*
 * Unsolicited events
 */

static void hdmi_present_sense(struct hdmi_spec_per_pin *per_pin, int repoll);

static void check_presence_and_report(struct hda_codec *codec, hda_nid_t nid,
                                      int dev_id)
{
        struct hdmi_spec *spec = codec->spec;
        int pin_idx = pin_id_to_pin_index(codec, nid, dev_id);

        if (pin_idx < 0)
                return;
        mutex_lock(&spec->pcm_lock);
        hdmi_present_sense(get_pin(spec, pin_idx), 1);
        mutex_unlock(&spec->pcm_lock);
}

static void jack_callback(struct hda_codec *codec,
                          struct hda_jack_callback *jack)
{
        /* stop polling when notification is enabled */
        if (codec_has_acomp(codec))
                return;

        check_presence_and_report(codec, jack->nid, jack->dev_id);
}

static void hdmi_intrinsic_event(struct hda_codec *codec, unsigned int res,
                                 struct hda_jack_tbl *jack)
{
        jack->jack_dirty = 1;

        codec_dbg(codec,
                "HDMI hot plug event: Codec=%d NID=0x%x Device=%d Inactive=%d Presence_Detect=%d ELD_Valid=%d\n",
                codec->addr, jack->nid, jack->dev_id, !!(res & AC_UNSOL_RES_IA),
                !!(res & AC_UNSOL_RES_PD), !!(res & AC_UNSOL_RES_ELDV));

        check_presence_and_report(codec, jack->nid, jack->dev_id);
}

static void hdmi_non_intrinsic_event(struct hda_codec *codec, unsigned int res)
{
        int tag = res >> AC_UNSOL_RES_TAG_SHIFT;
        int subtag = (res & AC_UNSOL_RES_SUBTAG) >> AC_UNSOL_RES_SUBTAG_SHIFT;
        int cp_state = !!(res & AC_UNSOL_RES_CP_STATE);
        int cp_ready = !!(res & AC_UNSOL_RES_CP_READY);

        codec_info(codec,
                "HDMI CP event: CODEC=%d TAG=%d SUBTAG=0x%x CP_STATE=%d CP_READY=%d\n",
                codec->addr,
                tag,
                subtag,
                cp_state,
                cp_ready);

        /* TODO */
        if (cp_state) {
                ;
        }
        if (cp_ready) {
                ;
        }
}


static void hdmi_unsol_event(struct hda_codec *codec, unsigned int res)
{
        int tag = res >> AC_UNSOL_RES_TAG_SHIFT;
        int subtag = (res & AC_UNSOL_RES_SUBTAG) >> AC_UNSOL_RES_SUBTAG_SHIFT;
        struct hda_jack_tbl *jack;

        if (codec_has_acomp(codec))
                return;

        if (codec->dp_mst) {
                int dev_entry =
                        (res & AC_UNSOL_RES_DE) >> AC_UNSOL_RES_DE_SHIFT;

                jack = snd_hda_jack_tbl_get_from_tag(codec, tag, dev_entry);
        } else {
                jack = snd_hda_jack_tbl_get_from_tag(codec, tag, 0);
        }

        if (!jack) {
                codec_dbg(codec, "Unexpected HDMI event tag 0x%x\n", tag);
                return;
        }

        if (subtag == 0)
                hdmi_intrinsic_event(codec, res, jack);
        else
                hdmi_non_intrinsic_event(codec, res);
}

static void haswell_verify_D0(struct hda_codec *codec,
                hda_nid_t cvt_nid, hda_nid_t nid)
{
        int pwr;

        /* For Haswell, the converter 1/2 may keep in D3 state after bootup,
         * thus pins could only choose converter 0 for use. Make sure the
         * converters are in correct power state */
        if (!snd_hda_check_power_state(codec, cvt_nid, AC_PWRST_D0))
                snd_hda_codec_write(codec, cvt_nid, 0, AC_VERB_SET_POWER_STATE, AC_PWRST_D0);

        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);
                msleep(40);
                pwr = snd_hda_codec_read(codec, nid, 0, AC_VERB_GET_POWER_STATE, 0);
                pwr = (pwr & AC_PWRST_ACTUAL) >> AC_PWRST_ACTUAL_SHIFT;
                codec_dbg(codec, "Haswell HDMI audio: Power for NID 0x%x is now D%d\n", nid, pwr);
        }
}

/*
 * Callbacks
 */

/* HBR should be Non-PCM, 8 channels */
#define is_hbr_format(format) \
        ((format & AC_FMT_TYPE_NON_PCM) && (format & AC_FMT_CHAN_MASK) == 7)

static int hdmi_pin_hbr_setup(struct hda_codec *codec, hda_nid_t pin_nid,
                              int dev_id, bool hbr)
{
        int pinctl, new_pinctl;

        if (snd_hda_query_pin_caps(codec, pin_nid) & AC_PINCAP_HBR) {
                snd_hda_set_dev_select(codec, pin_nid, dev_id);
                pinctl = snd_hda_codec_read(codec, pin_nid, 0,
                                            AC_VERB_GET_PIN_WIDGET_CONTROL, 0);

                if (pinctl < 0)
                        return hbr ? -EINVAL : 0;

                new_pinctl = pinctl & ~AC_PINCTL_EPT;
                if (hbr)
                        new_pinctl |= AC_PINCTL_EPT_HBR;
                else
                        new_pinctl |= AC_PINCTL_EPT_NATIVE;

                codec_dbg(codec,
                          "hdmi_pin_hbr_setup: NID=0x%x, %spinctl=0x%x\n",
                            pin_nid,
                            pinctl == new_pinctl ? "" : "new-",
                            new_pinctl);

                if (pinctl != new_pinctl)
                        snd_hda_codec_write(codec, pin_nid, 0,
                                            AC_VERB_SET_PIN_WIDGET_CONTROL,
                                            new_pinctl);
        } else if (hbr)
                return -EINVAL;

        return 0;
}

static int hdmi_setup_stream(struct hda_codec *codec, hda_nid_t cvt_nid,
                              hda_nid_t pin_nid, int dev_id,
                              u32 stream_tag, int format)
{
        struct hdmi_spec *spec = codec->spec;
        unsigned int param;
        int err;

        err = spec->ops.pin_hbr_setup(codec, pin_nid, dev_id,
                                      is_hbr_format(format));

        if (err) {
                codec_dbg(codec, "hdmi_setup_stream: HBR is not supported\n");
                return err;
        }

        if (spec->intel_hsw_fixup) {

                /*
                 * on recent platforms IEC Coding Type is required for HBR
                 * support, read current Digital Converter settings and set
                 * ICT bitfield if needed.
                 */
                param = snd_hda_codec_read(codec, cvt_nid, 0,
                                           AC_VERB_GET_DIGI_CONVERT_1, 0);

                param = (param >> 16) & ~(AC_DIG3_ICT);

                /* on recent platforms ICT mode is required for HBR support */
                if (is_hbr_format(format))
                        param |= 0x1;

                snd_hda_codec_write(codec, cvt_nid, 0,
                                    AC_VERB_SET_DIGI_CONVERT_3, param);
        }

        snd_hda_codec_setup_stream(codec, cvt_nid, stream_tag, 0, format);
        return 0;
}

/* Try to find an available converter
 * If pin_idx is less then zero, just try to find an available converter.
 * Otherwise, try to find an available converter and get the cvt mux index
 * of the pin.
 */
static int hdmi_choose_cvt(struct hda_codec *codec,
                           int pin_idx, int *cvt_id)
{
        struct hdmi_spec *spec = codec->spec;
        struct hdmi_spec_per_pin *per_pin;
        struct hdmi_spec_per_cvt *per_cvt = NULL;
        int cvt_idx, mux_idx = 0;

        /* pin_idx < 0 means no pin will be bound to the converter */
        if (pin_idx < 0)
                per_pin = NULL;
        else
                per_pin = get_pin(spec, pin_idx);

        if (per_pin && per_pin->silent_stream) {
                cvt_idx = cvt_nid_to_cvt_index(codec, per_pin->cvt_nid);
                if (cvt_id)
                        *cvt_id = cvt_idx;
                return 0;
        }

        /* Dynamically assign converter to stream */
        for (cvt_idx = 0; cvt_idx < spec->num_cvts; cvt_idx++) {
                per_cvt = get_cvt(spec, cvt_idx);

                /* Must not already be assigned */
                if (per_cvt->assigned)
                        continue;
                if (per_pin == NULL)
                        break;

                /* Must be in pin's mux's list of converters */
                for (mux_idx = 0; mux_idx < per_pin->num_mux_nids; mux_idx++)
                        if (per_pin->mux_nids[mux_idx] == per_cvt->cvt_nid)
                                break;
                /* Not in mux list */
                if (mux_idx == per_pin->num_mux_nids)
                        continue;
                break;
        }

        /* No free converters */
        if (cvt_idx == spec->num_cvts)
                return -EBUSY;

        if (per_pin != NULL)
                per_pin->mux_idx = mux_idx;

        if (cvt_id)
                *cvt_id = cvt_idx;

        return 0;
}

/* Assure the pin select the right convetor */
static void intel_verify_pin_cvt_connect(struct hda_codec *codec,
                        struct hdmi_spec_per_pin *per_pin)
{
        hda_nid_t pin_nid = per_pin->pin_nid;
        int mux_idx, curr;

        mux_idx = per_pin->mux_idx;
        curr = snd_hda_codec_read(codec, pin_nid, 0,
                                          AC_VERB_GET_CONNECT_SEL, 0);
        if (curr != mux_idx)
                snd_hda_codec_write_cache(codec, pin_nid, 0,
                                            AC_VERB_SET_CONNECT_SEL,
                                            mux_idx);
}

/* get the mux index for the converter of the pins
 * converter's mux index is the same for all pins on Intel platform
 */
static int intel_cvt_id_to_mux_idx(struct hdmi_spec *spec,
                        hda_nid_t cvt_nid)
{
        int i;

        for (i = 0; i < spec->num_cvts; i++)
                if (spec->cvt_nids[i] == cvt_nid)
                        return i;
        return -EINVAL;
}

/* Intel HDMI workaround to fix audio routing issue:
 * For some Intel display codecs, pins share the same connection list.
 * So a conveter can be selected by multiple pins and playback on any of these
 * pins will generate sound on the external display, because audio flows from
 * the same converter to the display pipeline. Also muting one pin may make
 * other pins have no sound output.
 * So this function assures that an assigned converter for a pin is not selected
 * by any other pins.
 */
static void intel_not_share_assigned_cvt(struct hda_codec *codec,
                                         hda_nid_t pin_nid,
                                         int dev_id, int mux_idx)
{
        struct hdmi_spec *spec = codec->spec;
        hda_nid_t nid;
        int cvt_idx, curr;
        struct hdmi_spec_per_cvt *per_cvt;
        struct hdmi_spec_per_pin *per_pin;
        int pin_idx;

        /* configure the pins connections */
        for (pin_idx = 0; pin_idx < spec->num_pins; pin_idx++) {
                int dev_id_saved;
                int dev_num;

                per_pin = get_pin(spec, pin_idx);
                /*
                 * pin not connected to monitor
                 * no need to operate on it
                 */
                if (!per_pin->pcm)
                        continue;

                if ((per_pin->pin_nid == pin_nid) &&
                        (per_pin->dev_id == dev_id))
                        continue;

                /*
                 * if per_pin->dev_id >= dev_num,
                 * snd_hda_get_dev_select() will fail,
                 * and the following operation is unpredictable.
                 * So skip this situation.
                 */
                dev_num = snd_hda_get_num_devices(codec, per_pin->pin_nid) + 1;
                if (per_pin->dev_id >= dev_num)
                        continue;

                nid = per_pin->pin_nid;

                /*
                 * Calling this function should not impact
                 * on the device entry selection
                 * So let's save the dev id for each pin,
                 * and restore it when return
                 */
                dev_id_saved = snd_hda_get_dev_select(codec, nid);
                snd_hda_set_dev_select(codec, nid, per_pin->dev_id);
                curr = snd_hda_codec_read(codec, nid, 0,
                                          AC_VERB_GET_CONNECT_SEL, 0);
                if (curr != mux_idx) {
                        snd_hda_set_dev_select(codec, nid, dev_id_saved);
                        continue;
                }


                /* choose an unassigned converter. The conveters in the
                 * connection list are in the same order as in the codec.
                 */
                for (cvt_idx = 0; cvt_idx < spec->num_cvts; cvt_idx++) {
                        per_cvt = get_cvt(spec, cvt_idx);
                        if (!per_cvt->assigned) {
                                codec_dbg(codec,
                                          "choose cvt %d for pin NID 0x%x\n",
                                          cvt_idx, nid);
                                snd_hda_codec_write_cache(codec, nid, 0,
                                            AC_VERB_SET_CONNECT_SEL,
                                            cvt_idx);
                                break;
                        }
                }
                snd_hda_set_dev_select(codec, nid, dev_id_saved);
        }
}

/* A wrapper of intel_not_share_asigned_cvt() */
static void intel_not_share_assigned_cvt_nid(struct hda_codec *codec,
                        hda_nid_t pin_nid, int dev_id, hda_nid_t cvt_nid)
{
        int mux_idx;
        struct hdmi_spec *spec = codec->spec;

        /* On Intel platform, the mapping of converter nid to
         * mux index of the pins are always the same.
         * The pin nid may be 0, this means all pins will not
         * share the converter.
         */
        mux_idx = intel_cvt_id_to_mux_idx(spec, cvt_nid);
        if (mux_idx >= 0)
                intel_not_share_assigned_cvt(codec, pin_nid, dev_id, mux_idx);
}

/* skeleton caller of pin_cvt_fixup ops */
static void pin_cvt_fixup(struct hda_codec *codec,
                          struct hdmi_spec_per_pin *per_pin,
                          hda_nid_t cvt_nid)
{
        struct hdmi_spec *spec = codec->spec;

        if (spec->ops.pin_cvt_fixup)
                spec->ops.pin_cvt_fixup(codec, per_pin, cvt_nid);
}

/* called in hdmi_pcm_open when no pin is assigned to the PCM
 * in dyn_pcm_assign mode.
 */
static int hdmi_pcm_open_no_pin(struct hda_pcm_stream *hinfo,
                         struct hda_codec *codec,
                         struct snd_pcm_substream *substream)
{
        struct hdmi_spec *spec = codec->spec;
        struct snd_pcm_runtime *runtime = substream->runtime;
        int cvt_idx, pcm_idx;
        struct hdmi_spec_per_cvt *per_cvt = NULL;
        int err;

        pcm_idx = hinfo_to_pcm_index(codec, hinfo);
        if (pcm_idx < 0)
                return -EINVAL;

        err = hdmi_choose_cvt(codec, -1, &cvt_idx);
        if (err)
                return err;

        per_cvt = get_cvt(spec, cvt_idx);
        per_cvt->assigned = 1;
        hinfo->nid = per_cvt->cvt_nid;

        pin_cvt_fixup(codec, NULL, per_cvt->cvt_nid);

        set_bit(pcm_idx, &spec->pcm_in_use);
        /* todo: setup spdif ctls assign */

        /* Initially set the converter's capabilities */
        hinfo->channels_min = per_cvt->channels_min;
        hinfo->channels_max = per_cvt->channels_max;
        hinfo->rates = per_cvt->rates;
        hinfo->formats = per_cvt->formats;
        hinfo->maxbps = per_cvt->maxbps;

        /* Store the updated parameters */
        runtime->hw.channels_min = hinfo->channels_min;
        runtime->hw.channels_max = hinfo->channels_max;
        runtime->hw.formats = hinfo->formats;
        runtime->hw.rates = hinfo->rates;

        snd_pcm_hw_constraint_step(substream->runtime, 0,
                                   SNDRV_PCM_HW_PARAM_CHANNELS, 2);
        return 0;
}

/*
 * HDA PCM callbacks
 */
static int hdmi_pcm_open(struct hda_pcm_stream *hinfo,
                         struct hda_codec *codec,
                         struct snd_pcm_substream *substream)
{
        struct hdmi_spec *spec = codec->spec;
        struct snd_pcm_runtime *runtime = substream->runtime;
        int pin_idx, cvt_idx, pcm_idx;
        struct hdmi_spec_per_pin *per_pin;
        struct hdmi_eld *eld;
        struct hdmi_spec_per_cvt *per_cvt = NULL;
        int err;

        /* Validate hinfo */
        pcm_idx = hinfo_to_pcm_index(codec, hinfo);
        if (pcm_idx < 0)
                return -EINVAL;

        mutex_lock(&spec->pcm_lock);
        pin_idx = hinfo_to_pin_index(codec, hinfo);
        if (!spec->dyn_pcm_assign) {
                if (snd_BUG_ON(pin_idx < 0)) {
                        err = -EINVAL;
                        goto unlock;
                }
        } else {
                /* no pin is assigned to the PCM
                 * PA need pcm open successfully when probe
                 */
                if (pin_idx < 0) {
                        err = hdmi_pcm_open_no_pin(hinfo, codec, substream);
                        goto unlock;
                }
        }

        err = hdmi_choose_cvt(codec, pin_idx, &cvt_idx);
        if (err < 0)
                goto unlock;

        per_cvt = get_cvt(spec, cvt_idx);
        /* Claim converter */
        per_cvt->assigned = 1;

        set_bit(pcm_idx, &spec->pcm_in_use);
        per_pin = get_pin(spec, pin_idx);
        per_pin->cvt_nid = per_cvt->cvt_nid;
        hinfo->nid = per_cvt->cvt_nid;

        /* flip stripe flag for the assigned stream if supported */
        if (get_wcaps(codec, per_cvt->cvt_nid) & AC_WCAP_STRIPE)
                azx_stream(get_azx_dev(substream))->stripe = 1;

        snd_hda_set_dev_select(codec, per_pin->pin_nid, per_pin->dev_id);
        snd_hda_codec_write_cache(codec, per_pin->pin_nid, 0,
                            AC_VERB_SET_CONNECT_SEL,
                            per_pin->mux_idx);

        /* configure unused pins to choose other converters */
        pin_cvt_fixup(codec, per_pin, 0);

        snd_hda_spdif_ctls_assign(codec, pcm_idx, per_cvt->cvt_nid);

        /* Initially set the converter's capabilities */
        hinfo->channels_min = per_cvt->channels_min;
        hinfo->channels_max = per_cvt->channels_max;
        hinfo->rates = per_cvt->rates;
        hinfo->formats = per_cvt->formats;
        hinfo->maxbps = per_cvt->maxbps;

        eld = &per_pin->sink_eld;
        /* Restrict capabilities by ELD if this isn't disabled */
        if (!static_hdmi_pcm && eld->eld_valid) {
                snd_hdmi_eld_update_pcm_info(&eld->info, hinfo);
                if (hinfo->channels_min > hinfo->channels_max ||
                    !hinfo->rates || !hinfo->formats) {
                        per_cvt->assigned = 0;
                        hinfo->nid = 0;
                        snd_hda_spdif_ctls_unassign(codec, pcm_idx);
                        err = -ENODEV;
                        goto unlock;
                }
        }

        /* Store the updated parameters */
        runtime->hw.channels_min = hinfo->channels_min;
        runtime->hw.channels_max = hinfo->channels_max;
        runtime->hw.formats = hinfo->formats;
        runtime->hw.rates = hinfo->rates;

        snd_pcm_hw_constraint_step(substream->runtime, 0,
                                   SNDRV_PCM_HW_PARAM_CHANNELS, 2);
 unlock:
        mutex_unlock(&spec->pcm_lock);
        return err;
}

/*
 * HDA/HDMI auto parsing
 */
static int hdmi_read_pin_conn(struct hda_codec *codec, int pin_idx)
{
        struct hdmi_spec *spec = codec->spec;
        struct hdmi_spec_per_pin *per_pin = get_pin(spec, pin_idx);
        hda_nid_t pin_nid = per_pin->pin_nid;
        int dev_id = per_pin->dev_id;
        int conns;

        if (!(get_wcaps(codec, pin_nid) & AC_WCAP_CONN_LIST)) {
                codec_warn(codec,
                           "HDMI: pin NID 0x%x wcaps %#x does not support connection list\n",
                           pin_nid, get_wcaps(codec, pin_nid));
                return -EINVAL;
        }

        snd_hda_set_dev_select(codec, pin_nid, dev_id);

        if (spec->intel_hsw_fixup) {
                conns = spec->num_cvts;
                memcpy(per_pin->mux_nids, spec->cvt_nids,
                       sizeof(hda_nid_t) * conns);
        } else {
                conns = snd_hda_get_raw_connections(codec, pin_nid,
                                                    per_pin->mux_nids,
                                                    HDA_MAX_CONNECTIONS);
        }

        /* all the device entries on the same pin have the same conn list */
        per_pin->num_mux_nids = conns;

        return 0;
}

static int hdmi_find_pcm_slot(struct hdmi_spec *spec,
                              struct hdmi_spec_per_pin *per_pin)
{
        int i;

        /* on the new machines, try to assign the pcm slot dynamically,
         * not use the preferred fixed map (legacy way) anymore.
         */
        if (spec->dyn_pcm_no_legacy)
                goto last_try;

        /*
         * generic_hdmi_build_pcms() may allocate extra PCMs on some
         * platforms (with maximum of 'num_nids + dev_num - 1')
         *
         * The per_pin of pin_nid_idx=n and dev_id=m prefers to get pcm-n
         * if m==0. This guarantees that dynamic pcm assignments are compatible
         * with the legacy static per_pin-pcm assignment that existed in the
         * days before DP-MST.
         *
         * Intel DP-MST prefers this legacy behavior for compatibility, too.
         *
         * per_pin of m!=0 prefers to get pcm=(num_nids + (m - 1)).
         */

        if (per_pin->dev_id == 0 || spec->intel_hsw_fixup) {
                if (!test_bit(per_pin->pin_nid_idx, &spec->pcm_bitmap))
                        return per_pin->pin_nid_idx;
        } else {
                i = spec->num_nids + (per_pin->dev_id - 1);
                if (i < spec->pcm_used && !(test_bit(i, &spec->pcm_bitmap)))
                        return i;
        }

        /* have a second try; check the area over num_nids */
        for (i = spec->num_nids; i < spec->pcm_used; i++) {
                if (!test_bit(i, &spec->pcm_bitmap))
                        return i;
        }

 last_try:
        /* the last try; check the empty slots in pins */
        for (i = 0; i < spec->num_nids; i++) {
                if (!test_bit(i, &spec->pcm_bitmap))
                        return i;
        }
        return -EBUSY;
}

static void hdmi_attach_hda_pcm(struct hdmi_spec *spec,
                                struct hdmi_spec_per_pin *per_pin)
{
        int idx;

        /* pcm already be attached to the pin */
        if (per_pin->pcm)
                return;
        idx = hdmi_find_pcm_slot(spec, per_pin);
        if (idx == -EBUSY)
                return;
        per_pin->pcm_idx = idx;
        per_pin->pcm = get_hdmi_pcm(spec, idx);
        set_bit(idx, &spec->pcm_bitmap);
}

static void hdmi_detach_hda_pcm(struct hdmi_spec *spec,
                                struct hdmi_spec_per_pin *per_pin)
{
        int idx;

        /* pcm already be detached from the pin */
        if (!per_pin->pcm)
                return;
        idx = per_pin->pcm_idx;
        per_pin->pcm_idx = -1;
        per_pin->pcm = NULL;
        if (idx >= 0 && idx < spec->pcm_used)
                clear_bit(idx, &spec->pcm_bitmap);
}

static int hdmi_get_pin_cvt_mux(struct hdmi_spec *spec,
                struct hdmi_spec_per_pin *per_pin, hda_nid_t cvt_nid)
{
        int mux_idx;

        for (mux_idx = 0; mux_idx < per_pin->num_mux_nids; mux_idx++)
                if (per_pin->mux_nids[mux_idx] == cvt_nid)
                        break;
        return mux_idx;
}

static bool check_non_pcm_per_cvt(struct hda_codec *codec, hda_nid_t cvt_nid);

static void hdmi_pcm_setup_pin(struct hdmi_spec *spec,
                           struct hdmi_spec_per_pin *per_pin)
{
        struct hda_codec *codec = per_pin->codec;
        struct hda_pcm *pcm;
        struct hda_pcm_stream *hinfo;
        struct snd_pcm_substream *substream;
        int mux_idx;
        bool non_pcm;

        if (per_pin->pcm_idx >= 0 && per_pin->pcm_idx < spec->pcm_used)
                pcm = get_pcm_rec(spec, per_pin->pcm_idx);
        else
                return;
        if (!pcm->pcm)
                return;
        if (!test_bit(per_pin->pcm_idx, &spec->pcm_in_use))
                return;

        /* hdmi audio only uses playback and one substream */
        hinfo = pcm->stream;
        substream = pcm->pcm->streams[0].substream;

        per_pin->cvt_nid = hinfo->nid;

        mux_idx = hdmi_get_pin_cvt_mux(spec, per_pin, hinfo->nid);
        if (mux_idx < per_pin->num_mux_nids) {
                snd_hda_set_dev_select(codec, per_pin->pin_nid,
                                   per_pin->dev_id);
                snd_hda_codec_write_cache(codec, per_pin->pin_nid, 0,
                                AC_VERB_SET_CONNECT_SEL,
                                mux_idx);
        }
        snd_hda_spdif_ctls_assign(codec, per_pin->pcm_idx, hinfo->nid);

        non_pcm = check_non_pcm_per_cvt(codec, hinfo->nid);
        if (substream->runtime)
                per_pin->channels = substream->runtime->channels;
        per_pin->setup = true;
        per_pin->mux_idx = mux_idx;

        hdmi_setup_audio_infoframe(codec, per_pin, non_pcm);
}

static void hdmi_pcm_reset_pin(struct hdmi_spec *spec,
                           struct hdmi_spec_per_pin *per_pin)
{
        if (per_pin->pcm_idx >= 0 && per_pin->pcm_idx < spec->pcm_used)
                snd_hda_spdif_ctls_unassign(per_pin->codec, per_pin->pcm_idx);

        per_pin->chmap_set = false;
        memset(per_pin->chmap, 0, sizeof(per_pin->chmap));

        per_pin->setup = false;
        per_pin->channels = 0;
}

static struct snd_jack *pin_idx_to_pcm_jack(struct hda_codec *codec,
                                            struct hdmi_spec_per_pin *per_pin)
{
        struct hdmi_spec *spec = codec->spec;

        if (per_pin->pcm_idx >= 0)
                return spec->pcm_rec[per_pin->pcm_idx].jack;
        else
                return NULL;
}

/* update per_pin ELD from the given new ELD;
 * setup info frame and notification accordingly
 * also notify ELD kctl and report jack status changes
 */
static void update_eld(struct hda_codec *codec,
                       struct hdmi_spec_per_pin *per_pin,
                       struct hdmi_eld *eld,
                       int repoll)
{
        struct hdmi_eld *pin_eld = &per_pin->sink_eld;
        struct hdmi_spec *spec = codec->spec;
        struct snd_jack *pcm_jack;
        bool old_eld_valid = pin_eld->eld_valid;
        bool eld_changed;
        int pcm_idx;

        if (eld->eld_valid) {
                if (eld->eld_size <= 0 ||
                    snd_hdmi_parse_eld(codec, &eld->info, eld->eld_buffer,
                                       eld->eld_size) < 0) {
                        eld->eld_valid = false;
                        if (repoll) {
                                schedule_delayed_work(&per_pin->work,
                                                      msecs_to_jiffies(300));
                                return;
                        }
                }
        }

        if (!eld->eld_valid || eld->eld_size <= 0) {
                eld->eld_valid = false;
                eld->eld_size = 0;
        }

        /* for monitor disconnection, save pcm_idx firstly */
        pcm_idx = per_pin->pcm_idx;

        /*
         * pcm_idx >=0 before update_eld() means it is in monitor
         * disconnected event. Jack must be fetched before update_eld().
         */
        pcm_jack = pin_idx_to_pcm_jack(codec, per_pin);

        if (spec->dyn_pcm_assign) {
                if (eld->eld_valid) {
                        hdmi_attach_hda_pcm(spec, per_pin);
                        hdmi_pcm_setup_pin(spec, per_pin);
                } else {
                        hdmi_pcm_reset_pin(spec, per_pin);
                        hdmi_detach_hda_pcm(spec, per_pin);
                }
        }
        /* if pcm_idx == -1, it means this is in monitor connection event
         * we can get the correct pcm_idx now.
         */
        if (pcm_idx == -1)
                pcm_idx = per_pin->pcm_idx;
        if (!pcm_jack)
                pcm_jack = pin_idx_to_pcm_jack(codec, per_pin);

        if (eld->eld_valid)
                snd_hdmi_show_eld(codec, &eld->info);

        eld_changed = (pin_eld->eld_valid != eld->eld_valid);
        eld_changed |= (pin_eld->monitor_present != eld->monitor_present);
        if (!eld_changed && eld->eld_valid && pin_eld->eld_valid)
                if (pin_eld->eld_size != eld->eld_size ||
                    memcmp(pin_eld->eld_buffer, eld->eld_buffer,
                           eld->eld_size) != 0)
                        eld_changed = true;

        if (eld_changed) {
                pin_eld->monitor_present = eld->monitor_present;
                pin_eld->eld_valid = eld->eld_valid;
                pin_eld->eld_size = eld->eld_size;
                if (eld->eld_valid)
                        memcpy(pin_eld->eld_buffer, eld->eld_buffer,
                               eld->eld_size);
                pin_eld->info = eld->info;
        }

        /*
         * Re-setup pin and infoframe. This is needed e.g. when
         * - sink is first plugged-in
         * - transcoder can change during stream playback on Haswell
         *   and this can make HW reset converter selection on a pin.
         */
        if (eld->eld_valid && !old_eld_valid && per_pin->setup) {
                pin_cvt_fixup(codec, per_pin, 0);
                hdmi_setup_audio_infoframe(codec, per_pin, per_pin->non_pcm);
        }

        if (eld_changed && pcm_idx >= 0)
                snd_ctl_notify(codec->card,
                               SNDRV_CTL_EVENT_MASK_VALUE |
                               SNDRV_CTL_EVENT_MASK_INFO,
                               &get_hdmi_pcm(spec, pcm_idx)->eld_ctl->id);

        if (eld_changed && pcm_jack)
                snd_jack_report(pcm_jack,
                                (eld->monitor_present && eld->eld_valid) ?
                                SND_JACK_AVOUT : 0);
}

/* update ELD and jack state via HD-audio verbs */
static void hdmi_present_sense_via_verbs(struct hdmi_spec_per_pin *per_pin,
                                         int repoll)
{
        struct hda_codec *codec = per_pin->codec;
        struct hdmi_spec *spec = codec->spec;
        struct hdmi_eld *eld = &spec->temp_eld;
        hda_nid_t pin_nid = per_pin->pin_nid;
        int dev_id = per_pin->dev_id;
        /*
         * Always execute a GetPinSense verb here, even when called from
         * hdmi_intrinsic_event; for some NVIDIA HW, the unsolicited
         * response's PD bit is not the real PD value, but indicates that
         * the real PD value changed. An older version of the HD-audio
         * specification worked this way. Hence, we just ignore the data in
         * the unsolicited response to avoid custom WARs.
         */
        int present;
        int ret;

        ret = snd_hda_power_up_pm(codec);
        if (ret < 0 && pm_runtime_suspended(hda_codec_dev(codec)))
                goto out;

        present = snd_hda_jack_pin_sense(codec, pin_nid, dev_id);

        mutex_lock(&per_pin->lock);
        eld->monitor_present = !!(present & AC_PINSENSE_PRESENCE);
        if (eld->monitor_present)
                eld->eld_valid  = !!(present & AC_PINSENSE_ELDV);
        else
                eld->eld_valid = false;

        codec_dbg(codec,
                "HDMI status: Codec=%d NID=0x%x Presence_Detect=%d ELD_Valid=%d\n",
                codec->addr, pin_nid, eld->monitor_present, eld->eld_valid);

        if (eld->eld_valid) {
                if (spec->ops.pin_get_eld(codec, pin_nid, dev_id,
                                          eld->eld_buffer, &eld->eld_size) < 0)
                        eld->eld_valid = false;
        }

        update_eld(codec, per_pin, eld, repoll);
        mutex_unlock(&per_pin->lock);
 out:
        snd_hda_power_down_pm(codec);
}

#define I915_SILENT_RATE                48000
#define I915_SILENT_CHANNELS            2
#define I915_SILENT_FORMAT              SNDRV_PCM_FORMAT_S16_LE
#define I915_SILENT_FORMAT_BITS 16
#define I915_SILENT_FMT_MASK            0xf

static void silent_stream_enable(struct hda_codec *codec,
                                 struct hdmi_spec_per_pin *per_pin)
{
        struct hdmi_spec *spec = codec->spec;
        struct hdmi_spec_per_cvt *per_cvt;
        int cvt_idx, pin_idx, err;
        unsigned int format;

        mutex_lock(&per_pin->lock);

        if (per_pin->setup) {
                codec_dbg(codec, "hdmi: PCM already open, no silent stream\n");
                goto unlock_out;
        }

        pin_idx = pin_id_to_pin_index(codec, per_pin->pin_nid, per_pin->dev_id);
        err = hdmi_choose_cvt(codec, pin_idx, &cvt_idx);
        if (err) {
                codec_err(codec, "hdmi: no free converter to enable silent mode\n");
                goto unlock_out;
        }

        per_cvt = get_cvt(spec, cvt_idx);
        per_cvt->assigned = 1;
        per_pin->cvt_nid = per_cvt->cvt_nid;
        per_pin->silent_stream = true;

        codec_dbg(codec, "hdmi: enabling silent stream pin-NID=0x%x cvt-NID=0x%x\n",
                  per_pin->pin_nid, per_cvt->cvt_nid);

        snd_hda_set_dev_select(codec, per_pin->pin_nid, per_pin->dev_id);
        snd_hda_codec_write_cache(codec, per_pin->pin_nid, 0,
                                  AC_VERB_SET_CONNECT_SEL,
                                  per_pin->mux_idx);

        /* configure unused pins to choose other converters */
        pin_cvt_fixup(codec, per_pin, 0);

        snd_hdac_sync_audio_rate(&codec->core, per_pin->pin_nid,
                                 per_pin->dev_id, I915_SILENT_RATE);

        /* trigger silent stream generation in hw */
        format = snd_hdac_calc_stream_format(I915_SILENT_RATE, I915_SILENT_CHANNELS,
                                             I915_SILENT_FORMAT, I915_SILENT_FORMAT_BITS, 0);
        snd_hda_codec_setup_stream(codec, per_pin->cvt_nid,
                                   I915_SILENT_FMT_MASK, I915_SILENT_FMT_MASK, format);
        usleep_range(100, 200);
        snd_hda_codec_setup_stream(codec, per_pin->cvt_nid, I915_SILENT_FMT_MASK, 0, format);

        per_pin->channels = I915_SILENT_CHANNELS;
        hdmi_setup_audio_infoframe(codec, per_pin, per_pin->non_pcm);

 unlock_out:
        mutex_unlock(&per_pin->lock);
}

static void silent_stream_disable(struct hda_codec *codec,
                                  struct hdmi_spec_per_pin *per_pin)
{
        struct hdmi_spec *spec = codec->spec;
        struct hdmi_spec_per_cvt *per_cvt;
        int cvt_idx;

        mutex_lock(&per_pin->lock);
        if (!per_pin->silent_stream)
                goto unlock_out;

        codec_dbg(codec, "HDMI: disable silent stream on pin-NID=0x%x cvt-NID=0x%x\n",
                  per_pin->pin_nid, per_pin->cvt_nid);

        cvt_idx = cvt_nid_to_cvt_index(codec, per_pin->cvt_nid);
        if (cvt_idx >= 0 && cvt_idx < spec->num_cvts) {
                per_cvt = get_cvt(spec, cvt_idx);
                per_cvt->assigned = 0;
        }

        per_pin->cvt_nid = 0;
        per_pin->silent_stream = false;

 unlock_out:
        mutex_unlock(&per_pin->lock);
}

/* update ELD and jack state via audio component */
static void sync_eld_via_acomp(struct hda_codec *codec,
                               struct hdmi_spec_per_pin *per_pin)
{
        struct hdmi_spec *spec = codec->spec;
        struct hdmi_eld *eld = &spec->temp_eld;
        bool monitor_prev, monitor_next;

        mutex_lock(&per_pin->lock);
        eld->monitor_present = false;
        monitor_prev = per_pin->sink_eld.monitor_present;
        eld->eld_size = snd_hdac_acomp_get_eld(&codec->core, per_pin->pin_nid,
                                      per_pin->dev_id, &eld->monitor_present,
                                      eld->eld_buffer, ELD_MAX_SIZE);
        eld->eld_valid = (eld->eld_size > 0);
        update_eld(codec, per_pin, eld, 0);
        monitor_next = per_pin->sink_eld.monitor_present;
        mutex_unlock(&per_pin->lock);

        /*
         * Power-up will call hdmi_present_sense, so the PM calls
         * have to be done without mutex held.
         */

        if (spec->send_silent_stream) {
                int pm_ret;

                if (!monitor_prev && monitor_next) {
                        pm_ret = snd_hda_power_up_pm(codec);
                        if (pm_ret < 0)
                                codec_err(codec,
                                "Monitor plugged-in, Failed to power up codec ret=[%d]\n",
                                pm_ret);
                        silent_stream_enable(codec, per_pin);
                } else if (monitor_prev && !monitor_next) {
                        silent_stream_disable(codec, per_pin);
                        pm_ret = snd_hda_power_down_pm(codec);
                        if (pm_ret < 0)
                                codec_err(codec,
                                "Monitor plugged-out, Failed to power down codec ret=[%d]\n",
                                pm_ret);
                }
        }
}

static void hdmi_present_sense(struct hdmi_spec_per_pin *per_pin, int repoll)
{
        struct hda_codec *codec = per_pin->codec;

        if (!codec_has_acomp(codec))
                hdmi_present_sense_via_verbs(per_pin, repoll);
        else
                sync_eld_via_acomp(codec, per_pin);
}

static void hdmi_repoll_eld(struct work_struct *work)
{
        struct hdmi_spec_per_pin *per_pin =
        container_of(to_delayed_work(work), struct hdmi_spec_per_pin, work);
        struct hda_codec *codec = per_pin->codec;
        struct hdmi_spec *spec = codec->spec;
        struct hda_jack_tbl *jack;

        jack = snd_hda_jack_tbl_get_mst(codec, per_pin->pin_nid,
                                        per_pin->dev_id);
        if (jack)
                jack->jack_dirty = 1;

        if (per_pin->repoll_count++ > 6)
                per_pin->repoll_count = 0;

        mutex_lock(&spec->pcm_lock);
        hdmi_present_sense(per_pin, per_pin->repoll_count);
        mutex_unlock(&spec->pcm_lock);
}

static int hdmi_add_pin(struct hda_codec *codec, hda_nid_t pin_nid)
{
        struct hdmi_spec *spec = codec->spec;
        unsigned int caps, config;
        int pin_idx;
        struct hdmi_spec_per_pin *per_pin;
        int err;
        int dev_num, i;

        caps = snd_hda_query_pin_caps(codec, pin_nid);
        if (!(caps & (AC_PINCAP_HDMI | AC_PINCAP_DP)))
                return 0;

        /*
         * For DP MST audio, Configuration Default is the same for
         * all device entries on the same pin
         */
        config = snd_hda_codec_get_pincfg(codec, pin_nid);
        if (get_defcfg_connect(config) == AC_JACK_PORT_NONE &&
            !spec->force_connect)
                return 0;

        /*
         * To simplify the implementation, malloc all
         * the virtual pins in the initialization statically
         */
        if (spec->intel_hsw_fixup) {
                /*
                 * On Intel platforms, device entries count returned
                 * by AC_PAR_DEVLIST_LEN is dynamic, and depends on
                 * the type of receiver that is connected. Allocate pin
                 * structures based on worst case.
                 */
                dev_num = spec->dev_num;
        } else if (spec->dyn_pcm_assign && codec->dp_mst) {
                dev_num = snd_hda_get_num_devices(codec, pin_nid) + 1;
                /*
                 * spec->dev_num is the maxinum number of device entries
                 * among all the pins
                 */
                spec->dev_num = (spec->dev_num > dev_num) ?
                        spec->dev_num : dev_num;
        } else {
                /*
                 * If the platform doesn't support DP MST,
                 * manually set dev_num to 1. This means
                 * the pin has only one device entry.
                 */
                dev_num = 1;
                spec->dev_num = 1;
        }

        for (i = 0; i < dev_num; i++) {
                pin_idx = spec->num_pins;
                per_pin = snd_array_new(&spec->pins);

                if (!per_pin)
                        return -ENOMEM;

                if (spec->dyn_pcm_assign) {
                        per_pin->pcm = NULL;
                        per_pin->pcm_idx = -1;
                } else {
                        per_pin->pcm = get_hdmi_pcm(spec, pin_idx);
                        per_pin->pcm_idx = pin_idx;
                }
                per_pin->pin_nid = pin_nid;
                per_pin->pin_nid_idx = spec->num_nids;
                per_pin->dev_id = i;
                per_pin->non_pcm = false;
                snd_hda_set_dev_select(codec, pin_nid, i);
                err = hdmi_read_pin_conn(codec, pin_idx);
                if (err < 0)
                        return err;
                spec->num_pins++;
        }
        spec->num_nids++;

        return 0;
}

static int hdmi_add_cvt(struct hda_codec *codec, hda_nid_t cvt_nid)
{
        struct hdmi_spec *spec = codec->spec;
        struct hdmi_spec_per_cvt *per_cvt;
        unsigned int chans;
        int err;

        chans = get_wcaps(codec, cvt_nid);
        chans = get_wcaps_channels(chans);

        per_cvt = snd_array_new(&spec->cvts);
        if (!per_cvt)
                return -ENOMEM;

        per_cvt->cvt_nid = cvt_nid;
        per_cvt->channels_min = 2;
        if (chans <= 16) {
                per_cvt->channels_max = chans;
                if (chans > spec->chmap.channels_max)
                        spec->chmap.channels_max = chans;
        }

        err = snd_hda_query_supported_pcm(codec, cvt_nid,
                                          &per_cvt->rates,
                                          &per_cvt->formats,
                                          &per_cvt->maxbps);
        if (err < 0)
                return err;

        if (spec->num_cvts < ARRAY_SIZE(spec->cvt_nids))
                spec->cvt_nids[spec->num_cvts] = cvt_nid;
        spec->num_cvts++;

        return 0;
}

static const struct snd_pci_quirk force_connect_list[] = {
        SND_PCI_QUIRK(0x103c, 0x870f, "HP", 1),
        SND_PCI_QUIRK(0x103c, 0x871a, "HP", 1),
        SND_PCI_QUIRK(0x1462, 0xec94, "MS-7C94", 1),
        SND_PCI_QUIRK(0x8086, 0x2081, "Intel NUC 10", 1),
        {}
};

static int hdmi_parse_codec(struct hda_codec *codec)
{
        struct hdmi_spec *spec = codec->spec;
        hda_nid_t start_nid;
        unsigned int caps;
        int i, nodes;
        const struct snd_pci_quirk *q;

        nodes = snd_hda_get_sub_nodes(codec, codec->core.afg, &start_nid);
        if (!start_nid || nodes < 0) {
                codec_warn(codec, "HDMI: failed to get afg sub nodes\n");
                return -EINVAL;
        }

        if (enable_all_pins)
                spec->force_connect = true;

        q = snd_pci_quirk_lookup(codec->bus->pci, force_connect_list);

        if (q && q->value)
                spec->force_connect = true;

        /*
         * hdmi_add_pin() assumes total amount of converters to
         * be known, so first discover all converters
         */
        for (i = 0; i < nodes; i++) {
                hda_nid_t nid = start_nid + i;

                caps = get_wcaps(codec, nid);

                if (!(caps & AC_WCAP_DIGITAL))
                        continue;

                if (get_wcaps_type(caps) == AC_WID_AUD_OUT)
                        hdmi_add_cvt(codec, nid);
        }

        /* discover audio pins */
        for (i = 0; i < nodes; i++) {
                hda_nid_t nid = start_nid + i;

                caps = get_wcaps(codec, nid);

                if (!(caps & AC_WCAP_DIGITAL))
                        continue;

                if (get_wcaps_type(caps) == AC_WID_PIN)
                        hdmi_add_pin(codec, nid);

        }

        return 0;
}

/*
 */
static bool check_non_pcm_per_cvt(struct hda_codec *codec, hda_nid_t cvt_nid)
{
        struct hda_spdif_out *spdif;
        bool non_pcm;

        mutex_lock(&codec->spdif_mutex);
        spdif = snd_hda_spdif_out_of_nid(codec, cvt_nid);
        /* Add sanity check to pass klockwork check.
         * This should never happen.
         */
        if (WARN_ON(spdif == NULL)) {
                mutex_unlock(&codec->spdif_mutex);
                return true;
        }
        non_pcm = !!(spdif->status & IEC958_AES0_NONAUDIO);
        mutex_unlock(&codec->spdif_mutex);
        return non_pcm;
}

/*
 * HDMI callbacks
 */

static int generic_hdmi_playback_pcm_prepare(struct hda_pcm_stream *hinfo,
                                           struct hda_codec *codec,
                                           unsigned int stream_tag,
                                           unsigned int format,
                                           struct snd_pcm_substream *substream)
{
        hda_nid_t cvt_nid = hinfo->nid;
        struct hdmi_spec *spec = codec->spec;
        int pin_idx;
        struct hdmi_spec_per_pin *per_pin;
        struct snd_pcm_runtime *runtime = substream->runtime;
        bool non_pcm;
        int pinctl, stripe;
        int err = 0;

        mutex_lock(&spec->pcm_lock);
        pin_idx = hinfo_to_pin_index(codec, hinfo);
        if (spec->dyn_pcm_assign && pin_idx < 0) {
                /* when dyn_pcm_assign and pcm is not bound to a pin
                 * skip pin setup and return 0 to make audio playback
                 * be ongoing
                 */
                pin_cvt_fixup(codec, NULL, cvt_nid);
                snd_hda_codec_setup_stream(codec, cvt_nid,
                                        stream_tag, 0, format);
                goto unlock;
        }

        if (snd_BUG_ON(pin_idx < 0)) {
                err = -EINVAL;
                goto unlock;
        }
        per_pin = get_pin(spec, pin_idx);

        /* Verify pin:cvt selections to avoid silent audio after S3.
         * After S3, the audio driver restores pin:cvt selections
         * but this can happen before gfx is ready and such selection
         * is overlooked by HW. Thus multiple pins can share a same
         * default convertor and mute control will affect each other,
         * which can cause a resumed audio playback become silent
         * after S3.
         */
        pin_cvt_fixup(codec, per_pin, 0);

        /* Call sync_audio_rate to set the N/CTS/M manually if necessary */
        /* Todo: add DP1.2 MST audio support later */
        if (codec_has_acomp(codec))
                snd_hdac_sync_audio_rate(&codec->core, per_pin->pin_nid,
                                         per_pin->dev_id, runtime->rate);

        non_pcm = check_non_pcm_per_cvt(codec, cvt_nid);
        mutex_lock(&per_pin->lock);
        per_pin->channels = substream->runtime->channels;
        per_pin->setup = true;

        if (get_wcaps(codec, cvt_nid) & AC_WCAP_STRIPE) {
                stripe = snd_hdac_get_stream_stripe_ctl(&codec->bus->core,
                                                        substream);
                snd_hda_codec_write(codec, cvt_nid, 0,
                                    AC_VERB_SET_STRIPE_CONTROL,
                                    stripe);
        }

        hdmi_setup_audio_infoframe(codec, per_pin, non_pcm);
        mutex_unlock(&per_pin->lock);
        if (spec->dyn_pin_out) {
                snd_hda_set_dev_select(codec, per_pin->pin_nid,
                                       per_pin->dev_id);
                pinctl = snd_hda_codec_read(codec, per_pin->pin_nid, 0,
                                            AC_VERB_GET_PIN_WIDGET_CONTROL, 0);
                snd_hda_codec_write(codec, per_pin->pin_nid, 0,
                                    AC_VERB_SET_PIN_WIDGET_CONTROL,
                                    pinctl | PIN_OUT);
        }

        /* snd_hda_set_dev_select() has been called before */
        err = spec->ops.setup_stream(codec, cvt_nid, per_pin->pin_nid,
                                     per_pin->dev_id, stream_tag, format);
 unlock:
        mutex_unlock(&spec->pcm_lock);
        return err;
}

static int generic_hdmi_playback_pcm_cleanup(struct hda_pcm_stream *hinfo,
                                             struct hda_codec *codec,
                                             struct snd_pcm_substream *substream)
{
        snd_hda_codec_cleanup_stream(codec, hinfo->nid);
        return 0;
}

static int hdmi_pcm_close(struct hda_pcm_stream *hinfo,
                          struct hda_codec *codec,
                          struct snd_pcm_substream *substream)
{
        struct hdmi_spec *spec = codec->spec;
        int cvt_idx, pin_idx, pcm_idx;
        struct hdmi_spec_per_cvt *per_cvt;
        struct hdmi_spec_per_pin *per_pin;
        int pinctl;
        int err = 0;

        mutex_lock(&spec->pcm_lock);
        if (hinfo->nid) {
                pcm_idx = hinfo_to_pcm_index(codec, hinfo);
                if (snd_BUG_ON(pcm_idx < 0)) {
                        err = -EINVAL;
                        goto unlock;
                }
                cvt_idx = cvt_nid_to_cvt_index(codec, hinfo->nid);
                if (snd_BUG_ON(cvt_idx < 0)) {
                        err = -EINVAL;
                        goto unlock;
                }
                per_cvt = get_cvt(spec, cvt_idx);
                per_cvt->assigned = 0;
                hinfo->nid = 0;

                azx_stream(get_azx_dev(substream))->stripe = 0;

                snd_hda_spdif_ctls_unassign(codec, pcm_idx);
                clear_bit(pcm_idx, &spec->pcm_in_use);
                pin_idx = hinfo_to_pin_index(codec, hinfo);
                if (spec->dyn_pcm_assign && pin_idx < 0)
                        goto unlock;

                if (snd_BUG_ON(pin_idx < 0)) {
                        err = -EINVAL;
                        goto unlock;
                }
                per_pin = get_pin(spec, pin_idx);

                if (spec->dyn_pin_out) {
                        snd_hda_set_dev_select(codec, per_pin->pin_nid,
                                               per_pin->dev_id);
                        pinctl = snd_hda_codec_read(codec, per_pin->pin_nid, 0,
                                        AC_VERB_GET_PIN_WIDGET_CONTROL, 0);
                        snd_hda_codec_write(codec, per_pin->pin_nid, 0,
                                            AC_VERB_SET_PIN_WIDGET_CONTROL,
                                            pinctl & ~PIN_OUT);
                }

                mutex_lock(&per_pin->lock);
                per_pin->chmap_set = false;
                memset(per_pin->chmap, 0, sizeof(per_pin->chmap));

                per_pin->setup = false;
                per_pin->channels = 0;
                mutex_unlock(&per_pin->lock);
        }

unlock:
        mutex_unlock(&spec->pcm_lock);

        return err;
}

static const struct hda_pcm_ops generic_ops = {
        .open = hdmi_pcm_open,
        .close = hdmi_pcm_close,
        .prepare = generic_hdmi_playback_pcm_prepare,
        .cleanup = generic_hdmi_playback_pcm_cleanup,
};

static int hdmi_get_spk_alloc(struct hdac_device *hdac, int pcm_idx)
{
        struct hda_codec *codec = hdac_to_hda_codec(hdac);
        struct hdmi_spec *spec = codec->spec;
        struct hdmi_spec_per_pin *per_pin = pcm_idx_to_pin(spec, pcm_idx);

        if (!per_pin)
                return 0;

        return per_pin->sink_eld.info.spk_alloc;
}

static void hdmi_get_chmap(struct hdac_device *hdac, int pcm_idx,
                                        unsigned char *chmap)
{
        struct hda_codec *codec = hdac_to_hda_codec(hdac);
        struct hdmi_spec *spec = codec->spec;
        struct hdmi_spec_per_pin *per_pin = pcm_idx_to_pin(spec, pcm_idx);

        /* chmap is already set to 0 in caller */
        if (!per_pin)
                return;

        memcpy(chmap, per_pin->chmap, ARRAY_SIZE(per_pin->chmap));
}

static void hdmi_set_chmap(struct hdac_device *hdac, int pcm_idx,
                                unsigned char *chmap, int prepared)
{
        struct hda_codec *codec = hdac_to_hda_codec(hdac);
        struct hdmi_spec *spec = codec->spec;
        struct hdmi_spec_per_pin *per_pin = pcm_idx_to_pin(spec, pcm_idx);

        if (!per_pin)
                return;
        mutex_lock(&per_pin->lock);
        per_pin->chmap_set = true;
        memcpy(per_pin->chmap, chmap, ARRAY_SIZE(per_pin->chmap));
        if (prepared)
                hdmi_setup_audio_infoframe(codec, per_pin, per_pin->non_pcm);
        mutex_unlock(&per_pin->lock);
}

static bool is_hdmi_pcm_attached(struct hdac_device *hdac, int pcm_idx)
{
        struct hda_codec *codec = hdac_to_hda_codec(hdac);
        struct hdmi_spec *spec = codec->spec;
        struct hdmi_spec_per_pin *per_pin = pcm_idx_to_pin(spec, pcm_idx);

        return per_pin ? true:false;
}

static int generic_hdmi_build_pcms(struct hda_codec *codec)
{
        struct hdmi_spec *spec = codec->spec;
        int idx, pcm_num;

        /*
         * for non-mst mode, pcm number is the same as before
         * for DP MST mode without extra PCM, pcm number is same
         * for DP MST mode with extra PCMs, pcm number is
         *  (nid number + dev_num - 1)
         * dev_num is the device entry number in a pin
         */

        if (codec->mst_no_extra_pcms)
                pcm_num = spec->num_nids;
        else
                pcm_num = spec->num_nids + spec->dev_num - 1;

        codec_dbg(codec, "hdmi: pcm_num set to %d\n", pcm_num);

        for (idx = 0; idx < pcm_num; idx++) {
                struct hda_pcm *info;
                struct hda_pcm_stream *pstr;

                info = snd_hda_codec_pcm_new(codec, "HDMI %d", idx);
                if (!info)
                        return -ENOMEM;

                spec->pcm_rec[idx].pcm = info;
                spec->pcm_used++;
                info->pcm_type = HDA_PCM_TYPE_HDMI;
                info->own_chmap = true;

                pstr = &info->stream[SNDRV_PCM_STREAM_PLAYBACK];
                pstr->substreams = 1;
                pstr->ops = generic_ops;
                /* pcm number is less than 16 */
                if (spec->pcm_used >= 16)
                        break;
                /* other pstr fields are set in open */
        }

        return 0;
}

static void free_hdmi_jack_priv(struct snd_jack *jack)
{
        struct hdmi_pcm *pcm = jack->private_data;

        pcm->jack = NULL;
}

static int generic_hdmi_build_jack(struct hda_codec *codec, int pcm_idx)
{
        char hdmi_str[32] = "HDMI/DP";
        struct hdmi_spec *spec = codec->spec;
        struct hdmi_spec_per_pin *per_pin = get_pin(spec, pcm_idx);
        struct snd_jack *jack;
        int pcmdev = get_pcm_rec(spec, pcm_idx)->device;
        int err;

        if (pcmdev > 0)
                sprintf(hdmi_str + strlen(hdmi_str), ",pcm=%d", pcmdev);
        if (!spec->dyn_pcm_assign &&
            !is_jack_detectable(codec, per_pin->pin_nid))
                strncat(hdmi_str, " Phantom",
                        sizeof(hdmi_str) - strlen(hdmi_str) - 1);

        err = snd_jack_new(codec->card, hdmi_str, SND_JACK_AVOUT, &jack,
                           true, false);
        if (err < 0)
                return err;

        spec->pcm_rec[pcm_idx].jack = jack;
        jack->private_data = &spec->pcm_rec[pcm_idx];
        jack->private_free = free_hdmi_jack_priv;
        return 0;
}

static int generic_hdmi_build_controls(struct hda_codec *codec)
{
        struct hdmi_spec *spec = codec->spec;
        int dev, err;
        int pin_idx, pcm_idx;

        for (pcm_idx = 0; pcm_idx < spec->pcm_used; pcm_idx++) {
                if (!get_pcm_rec(spec, pcm_idx)->pcm) {
                        /* no PCM: mark this for skipping permanently */
                        set_bit(pcm_idx, &spec->pcm_bitmap);
                        continue;
                }

                err = generic_hdmi_build_jack(codec, pcm_idx);
                if (err < 0)
                        return err;

                /* create the spdif for each pcm
                 * pin will be bound when monitor is connected
                 */
                if (spec->dyn_pcm_assign)
                        err = snd_hda_create_dig_out_ctls(codec,
                                          0, spec->cvt_nids[0],
                                          HDA_PCM_TYPE_HDMI);
                else {
                        struct hdmi_spec_per_pin *per_pin =
                                get_pin(spec, pcm_idx);
                        err = snd_hda_create_dig_out_ctls(codec,
                                                  per_pin->pin_nid,
                                                  per_pin->mux_nids[0],
                                                  HDA_PCM_TYPE_HDMI);
                }
                if (err < 0)
                        return err;
                snd_hda_spdif_ctls_unassign(codec, pcm_idx);

                dev = get_pcm_rec(spec, pcm_idx)->device;
                if (dev != SNDRV_PCM_INVALID_DEVICE) {
                        /* add control for ELD Bytes */
                        err = hdmi_create_eld_ctl(codec, pcm_idx, dev);
                        if (err < 0)
                                return err;
                }
        }

        for (pin_idx = 0; pin_idx < spec->num_pins; pin_idx++) {
                struct hdmi_spec_per_pin *per_pin = get_pin(spec, pin_idx);
                struct hdmi_eld *pin_eld = &per_pin->sink_eld;

                pin_eld->eld_valid = false;
                hdmi_present_sense(per_pin, 0);
        }

        /* add channel maps */
        for (pcm_idx = 0; pcm_idx < spec->pcm_used; pcm_idx++) {
                struct hda_pcm *pcm;

                pcm = get_pcm_rec(spec, pcm_idx);
                if (!pcm || !pcm->pcm)
                        break;
                err = snd_hdac_add_chmap_ctls(pcm->pcm, pcm_idx, &spec->chmap);
                if (err < 0)
                        return err;
        }

        return 0;
}

static int generic_hdmi_init_per_pins(struct hda_codec *codec)
{
        struct hdmi_spec *spec = codec->spec;
        int pin_idx;

        for (pin_idx = 0; pin_idx < spec->num_pins; pin_idx++) {
                struct hdmi_spec_per_pin *per_pin = get_pin(spec, pin_idx);

                per_pin->codec = codec;
                mutex_init(&per_pin->lock);
                INIT_DELAYED_WORK(&per_pin->work, hdmi_repoll_eld);
                eld_proc_new(per_pin, pin_idx);
        }
        return 0;
}

static int generic_hdmi_init(struct hda_codec *codec)
{
        struct hdmi_spec *spec = codec->spec;
        int pin_idx;

        mutex_lock(&spec->bind_lock);
        for (pin_idx = 0; pin_idx < spec->num_pins; pin_idx++) {
                struct hdmi_spec_per_pin *per_pin = get_pin(spec, pin_idx);
                hda_nid_t pin_nid = per_pin->pin_nid;
                int dev_id = per_pin->dev_id;

                snd_hda_set_dev_select(codec, pin_nid, dev_id);
                hdmi_init_pin(codec, pin_nid);
                if (codec_has_acomp(codec))
                        continue;
                snd_hda_jack_detect_enable_callback_mst(codec, pin_nid, dev_id,
                                                        jack_callback);
        }
        mutex_unlock(&spec->bind_lock);
        return 0;
}

static void hdmi_array_init(struct hdmi_spec *spec, int nums)
{
        snd_array_init(&spec->pins, sizeof(struct hdmi_spec_per_pin), nums);
        snd_array_init(&spec->cvts, sizeof(struct hdmi_spec_per_cvt), nums);
}

static void hdmi_array_free(struct hdmi_spec *spec)
{
        snd_array_free(&spec->pins);
        snd_array_free(&spec->cvts);
}

static void generic_spec_free(struct hda_codec *codec)
{
        struct hdmi_spec *spec = codec->spec;

        if (spec) {
                hdmi_array_free(spec);
                kfree(spec);
                codec->spec = NULL;
        }
        codec->dp_mst = false;
}

static void generic_hdmi_free(struct hda_codec *codec)
{
        struct hdmi_spec *spec = codec->spec;
        int pin_idx, pcm_idx;

        if (spec->acomp_registered) {
                snd_hdac_acomp_exit(&codec->bus->core);
        } else if (codec_has_acomp(codec)) {
                snd_hdac_acomp_register_notifier(&codec->bus->core, NULL);
        }
        codec->relaxed_resume = 0;

        for (pin_idx = 0; pin_idx < spec->num_pins; pin_idx++) {
                struct hdmi_spec_per_pin *per_pin = get_pin(spec, pin_idx);
                cancel_delayed_work_sync(&per_pin->work);
                eld_proc_free(per_pin);
        }

        for (pcm_idx = 0; pcm_idx < spec->pcm_used; pcm_idx++) {
                if (spec->pcm_rec[pcm_idx].jack == NULL)
                        continue;
                if (spec->dyn_pcm_assign)
                        snd_device_free(codec->card,
                                        spec->pcm_rec[pcm_idx].jack);
                else
                        spec->pcm_rec[pcm_idx].jack = NULL;
        }

        generic_spec_free(codec);
}

#ifdef CONFIG_PM
static int generic_hdmi_suspend(struct hda_codec *codec)
{
        struct hdmi_spec *spec = codec->spec;
        int pin_idx;

        for (pin_idx = 0; pin_idx < spec->num_pins; pin_idx++) {
                struct hdmi_spec_per_pin *per_pin = get_pin(spec, pin_idx);
                cancel_delayed_work_sync(&per_pin->work);
        }
        return 0;
}

static int generic_hdmi_resume(struct hda_codec *codec)
{
        struct hdmi_spec *spec = codec->spec;
        int pin_idx;

        codec->patch_ops.init(codec);
        snd_hda_regmap_sync(codec);

        for (pin_idx = 0; pin_idx < spec->num_pins; pin_idx++) {
                struct hdmi_spec_per_pin *per_pin = get_pin(spec, pin_idx);
                hdmi_present_sense(per_pin, 1);
        }
        return 0;
}
#endif

static const struct hda_codec_ops generic_hdmi_patch_ops = {
        .init                   = generic_hdmi_init,
        .free                   = generic_hdmi_free,
        .build_pcms             = generic_hdmi_build_pcms,
        .build_controls         = generic_hdmi_build_controls,
        .unsol_event            = hdmi_unsol_event,
#ifdef CONFIG_PM
        .suspend                = generic_hdmi_suspend,
        .resume                 = generic_hdmi_resume,
#endif
};

static const struct hdmi_ops generic_standard_hdmi_ops = {
        .pin_get_eld                            = hdmi_pin_get_eld,
        .pin_setup_infoframe                    = hdmi_pin_setup_infoframe,
        .pin_hbr_setup                          = hdmi_pin_hbr_setup,
        .setup_stream                           = hdmi_setup_stream,
};

/* allocate codec->spec and assign/initialize generic parser ops */
static int alloc_generic_hdmi(struct hda_codec *codec)
{
        struct hdmi_spec *spec;

        spec = kzalloc(sizeof(*spec), GFP_KERNEL);
        if (!spec)
                return -ENOMEM;

        spec->codec = codec;
        spec->ops = generic_standard_hdmi_ops;
        spec->dev_num = 1;      /* initialize to 1 */
        mutex_init(&spec->pcm_lock);
        mutex_init(&spec->bind_lock);
        snd_hdac_register_chmap_ops(&codec->core, &spec->chmap);

        spec->chmap.ops.get_chmap = hdmi_get_chmap;
        spec->chmap.ops.set_chmap = hdmi_set_chmap;
        spec->chmap.ops.is_pcm_attached = is_hdmi_pcm_attached;
        spec->chmap.ops.get_spk_alloc = hdmi_get_spk_alloc;

        codec->spec = spec;
        hdmi_array_init(spec, 4);

        codec->patch_ops = generic_hdmi_patch_ops;

        return 0;
}

/* generic HDMI parser */
static int patch_generic_hdmi(struct hda_codec *codec)
{
        int err;

        err = alloc_generic_hdmi(codec);
        if (err < 0)
                return err;

        err = hdmi_parse_codec(codec);
        if (err < 0) {
                generic_spec_free(codec);
                return err;
        }

        generic_hdmi_init_per_pins(codec);
        return 0;
}

/*
 * generic audio component binding
 */

/* turn on / off the unsol event jack detection dynamically */
static void reprogram_jack_detect(struct hda_codec *codec, hda_nid_t nid,
                                  int dev_id, bool use_acomp)
{
        struct hda_jack_tbl *tbl;

        tbl = snd_hda_jack_tbl_get_mst(codec, nid, dev_id);
        if (tbl) {
                /* clear unsol even if component notifier is used, or re-enable
                 * if notifier is cleared
                 */
                unsigned int val = use_acomp ? 0 : (AC_USRSP_EN | tbl->tag);
                snd_hda_codec_write_cache(codec, nid, 0,
                                          AC_VERB_SET_UNSOLICITED_ENABLE, val);
        }
}

/* set up / clear component notifier dynamically */
static void generic_acomp_notifier_set(struct drm_audio_component *acomp,
                                       bool use_acomp)
{
        struct hdmi_spec *spec;
        int i;

        spec = container_of(acomp->audio_ops, struct hdmi_spec, drm_audio_ops);
        mutex_lock(&spec->bind_lock);
        spec->use_acomp_notifier = use_acomp;
        spec->codec->relaxed_resume = use_acomp;
        spec->codec->bus->keep_power = 0;
        /* reprogram each jack detection logic depending on the notifier */
        for (i = 0; i < spec->num_pins; i++)
                reprogram_jack_detect(spec->codec,
                                      get_pin(spec, i)->pin_nid,
                                      get_pin(spec, i)->dev_id,
                                      use_acomp);
        mutex_unlock(&spec->bind_lock);
}

/* enable / disable the notifier via master bind / unbind */
static int generic_acomp_master_bind(struct device *dev,
                                     struct drm_audio_component *acomp)
{
        generic_acomp_notifier_set(acomp, true);
        return 0;
}

static void generic_acomp_master_unbind(struct device *dev,
                                        struct drm_audio_component *acomp)
{
        generic_acomp_notifier_set(acomp, false);
}

/* check whether both HD-audio and DRM PCI devices belong to the same bus */
static int match_bound_vga(struct device *dev, int subtype, void *data)
{
        struct hdac_bus *bus = data;
        struct pci_dev *pci, *master;

        if (!dev_is_pci(dev) || !dev_is_pci(bus->dev))
                return 0;
        master = to_pci_dev(bus->dev);
        pci = to_pci_dev(dev);
        return master->bus == pci->bus;
}

/* audio component notifier for AMD/Nvidia HDMI codecs */
static void generic_acomp_pin_eld_notify(void *audio_ptr, int port, int dev_id)
{
        struct hda_codec *codec = audio_ptr;
        struct hdmi_spec *spec = codec->spec;
        hda_nid_t pin_nid = spec->port2pin(codec, port);

        if (!pin_nid)
                return;
        if (get_wcaps_type(get_wcaps(codec, pin_nid)) != AC_WID_PIN)
                return;
        /* skip notification during system suspend (but not in runtime PM);
         * the state will be updated at resume
         */
        if (codec->core.dev.power.power_state.event == PM_EVENT_SUSPEND)
                return;
        /* ditto during suspend/resume process itself */
        if (snd_hdac_is_in_pm(&codec->core))
                return;

        check_presence_and_report(codec, pin_nid, dev_id);
}

/* set up the private drm_audio_ops from the template */
static void setup_drm_audio_ops(struct hda_codec *codec,
                                const struct drm_audio_component_audio_ops *ops)
{
        struct hdmi_spec *spec = codec->spec;

        spec->drm_audio_ops.audio_ptr = codec;
        /* intel_audio_codec_enable() or intel_audio_codec_disable()
         * will call pin_eld_notify with using audio_ptr pointer
         * We need make sure audio_ptr is really setup
         */
        wmb();
        spec->drm_audio_ops.pin2port = ops->pin2port;
        spec->drm_audio_ops.pin_eld_notify = ops->pin_eld_notify;
        spec->drm_audio_ops.master_bind = ops->master_bind;
        spec->drm_audio_ops.master_unbind = ops->master_unbind;
}

/* initialize the generic HDMI audio component */
static void generic_acomp_init(struct hda_codec *codec,
                               const struct drm_audio_component_audio_ops *ops,
                               int (*port2pin)(struct hda_codec *, int))
{
        struct hdmi_spec *spec = codec->spec;

        if (!enable_acomp) {
                codec_info(codec, "audio component disabled by module option\n");
                return;
        }

        spec->port2pin = port2pin;
        setup_drm_audio_ops(codec, ops);
        if (!snd_hdac_acomp_init(&codec->bus->core, &spec->drm_audio_ops,
                                 match_bound_vga, 0)) {
                spec->acomp_registered = true;
        }
}

/*
 * Intel codec parsers and helpers
 */

#define INTEL_GET_VENDOR_VERB   0xf81
#define INTEL_SET_VENDOR_VERB   0x781
#define INTEL_EN_DP12           0x02    /* enable DP 1.2 features */
#define INTEL_EN_ALL_PIN_CVTS   0x01    /* enable 2nd & 3rd pins and convertors */

static void intel_haswell_enable_all_pins(struct hda_codec *codec,
                                          bool update_tree)
{
        unsigned int vendor_param;
        struct hdmi_spec *spec = codec->spec;

        vendor_param = snd_hda_codec_read(codec, spec->vendor_nid, 0,
                                INTEL_GET_VENDOR_VERB, 0);
        if (vendor_param == -1 || vendor_param & INTEL_EN_ALL_PIN_CVTS)
                return;

        vendor_param |= INTEL_EN_ALL_PIN_CVTS;
        vendor_param = snd_hda_codec_read(codec, spec->vendor_nid, 0,
                                INTEL_SET_VENDOR_VERB, vendor_param);
        if (vendor_param == -1)
                return;

        if (update_tree)
                snd_hda_codec_update_widgets(codec);
}

static void intel_haswell_fixup_enable_dp12(struct hda_codec *codec)
{
        unsigned int vendor_param;
        struct hdmi_spec *spec = codec->spec;

        vendor_param = snd_hda_codec_read(codec, spec->vendor_nid, 0,
                                INTEL_GET_VENDOR_VERB, 0);
        if (vendor_param == -1 || vendor_param & INTEL_EN_DP12)
                return;

        /* enable DP1.2 mode */
        vendor_param |= INTEL_EN_DP12;
        snd_hdac_regmap_add_vendor_verb(&codec->core, INTEL_SET_VENDOR_VERB);
        snd_hda_codec_write_cache(codec, spec->vendor_nid, 0,
                                INTEL_SET_VENDOR_VERB, vendor_param);
}

/* Haswell needs to re-issue the vendor-specific verbs before turning to D0.
 * Otherwise you may get severe h/w communication errors.
 */
static void haswell_set_power_state(struct hda_codec *codec, hda_nid_t fg,
                                unsigned int power_state)
{
        if (power_state == AC_PWRST_D0) {
                intel_haswell_enable_all_pins(codec, false);
                intel_haswell_fixup_enable_dp12(codec);
        }

        snd_hda_codec_read(codec, fg, 0, AC_VERB_SET_POWER_STATE, power_state);
        snd_hda_codec_set_power_to_all(codec, fg, power_state);
}

/* There is a fixed mapping between audio pin node and display port.
 * on SNB, IVY, HSW, BSW, SKL, BXT, KBL:
 * Pin Widget 5 - PORT B (port = 1 in i915 driver)
 * Pin Widget 6 - PORT C (port = 2 in i915 driver)
 * Pin Widget 7 - PORT D (port = 3 in i915 driver)
 *
 * on VLV, ILK:
 * Pin Widget 4 - PORT B (port = 1 in i915 driver)
 * Pin Widget 5 - PORT C (port = 2 in i915 driver)
 * Pin Widget 6 - PORT D (port = 3 in i915 driver)
 */
static int intel_base_nid(struct hda_codec *codec)
{
        switch (codec->core.vendor_id) {
        case 0x80860054: /* ILK */
        case 0x80862804: /* ILK */
        case 0x80862882: /* VLV */
                return 4;
        default:
                return 5;
        }
}

static int intel_pin2port(void *audio_ptr, int pin_nid)
{
        struct hda_codec *codec = audio_ptr;
        struct hdmi_spec *spec = codec->spec;
        int base_nid, i;

        if (!spec->port_num) {
                base_nid = intel_base_nid(codec);
                if (WARN_ON(pin_nid < base_nid || pin_nid >= base_nid + 3))
                        return -1;
                return pin_nid - base_nid + 1;
        }

        /*
         * looking for the pin number in the mapping table and return
         * the index which indicate the port number
         */
        for (i = 0; i < spec->port_num; i++) {
                if (pin_nid == spec->port_map[i])
                        return i;
        }

        codec_info(codec, "Can't find the HDMI/DP port for pin NID 0x%x\n", pin_nid);
        return -1;
}

static int intel_port2pin(struct hda_codec *codec, int port)
{
        struct hdmi_spec *spec = codec->spec;

        if (!spec->port_num) {
                /* we assume only from port-B to port-D */
                if (port < 1 || port > 3)
                        return 0;
                return port + intel_base_nid(codec) - 1;
        }

        if (port < 0 || port >= spec->port_num)
                return 0;
        return spec->port_map[port];
}

static void intel_pin_eld_notify(void *audio_ptr, int port, int pipe)
{
        struct hda_codec *codec = audio_ptr;
        int pin_nid;
        int dev_id = pipe;

        pin_nid = intel_port2pin(codec, port);
        if (!pin_nid)
                return;
        /* skip notification during system suspend (but not in runtime PM);
         * the state will be updated at resume
         */
        if (codec->core.dev.power.power_state.event == PM_EVENT_SUSPEND)
                return;
        /* ditto during suspend/resume process itself */
        if (snd_hdac_is_in_pm(&codec->core))
                return;

        snd_hdac_i915_set_bclk(&codec->bus->core);
        check_presence_and_report(codec, pin_nid, dev_id);
}

static const struct drm_audio_component_audio_ops intel_audio_ops = {
        .pin2port = intel_pin2port,
        .pin_eld_notify = intel_pin_eld_notify,
};

/* register i915 component pin_eld_notify callback */
static void register_i915_notifier(struct hda_codec *codec)
{
        struct hdmi_spec *spec = codec->spec;

        spec->use_acomp_notifier = true;
        spec->port2pin = intel_port2pin;
        setup_drm_audio_ops(codec, &intel_audio_ops);
        snd_hdac_acomp_register_notifier(&codec->bus->core,
                                        &spec->drm_audio_ops);
        /* no need for forcible resume for jack check thanks to notifier */
        codec->relaxed_resume = 1;
}

/* setup_stream ops override for HSW+ */
static int i915_hsw_setup_stream(struct hda_codec *codec, hda_nid_t cvt_nid,
                                 hda_nid_t pin_nid, int dev_id, u32 stream_tag,
                                 int format)
{
        haswell_verify_D0(codec, cvt_nid, pin_nid);
        return hdmi_setup_stream(codec, cvt_nid, pin_nid, dev_id,
                                 stream_tag, format);
}

/* pin_cvt_fixup ops override for HSW+ and VLV+ */
static void i915_pin_cvt_fixup(struct hda_codec *codec,
                               struct hdmi_spec_per_pin *per_pin,
                               hda_nid_t cvt_nid)
{
        if (per_pin) {
                haswell_verify_D0(codec, per_pin->cvt_nid, per_pin->pin_nid);
                snd_hda_set_dev_select(codec, per_pin->pin_nid,
                               per_pin->dev_id);
                intel_verify_pin_cvt_connect(codec, per_pin);
                intel_not_share_assigned_cvt(codec, per_pin->pin_nid,
                                     per_pin->dev_id, per_pin->mux_idx);
        } else {
                intel_not_share_assigned_cvt_nid(codec, 0, 0, cvt_nid);
        }
}

/* precondition and allocation for Intel codecs */
static int alloc_intel_hdmi(struct hda_codec *codec)
{
        int err;

        /* requires i915 binding */
        if (!codec->bus->core.audio_component) {
                codec_info(codec, "No i915 binding for Intel HDMI/DP codec\n");
                /* set probe_id here to prevent generic fallback binding */
                codec->probe_id = HDA_CODEC_ID_SKIP_PROBE;
                return -ENODEV;
        }

        err = alloc_generic_hdmi(codec);
        if (err < 0)
                return err;
        /* no need to handle unsol events */
        codec->patch_ops.unsol_event = NULL;
        return 0;
}

/* parse and post-process for Intel codecs */
static int parse_intel_hdmi(struct hda_codec *codec)
{
        int err, retries = 3;

        do {
                err = hdmi_parse_codec(codec);
        } while (err < 0 && retries--);

        if (err < 0) {
                generic_spec_free(codec);
                return err;
        }

        generic_hdmi_init_per_pins(codec);
        register_i915_notifier(codec);
        return 0;
}

/* Intel Haswell and onwards; audio component with eld notifier */
static int intel_hsw_common_init(struct hda_codec *codec, hda_nid_t vendor_nid,
                                 const int *port_map, int port_num, int dev_num)
{
        struct hdmi_spec *spec;
        int err;

        err = alloc_intel_hdmi(codec);
        if (err < 0)
                return err;
        spec = codec->spec;
        codec->dp_mst = true;
        spec->dyn_pcm_assign = true;
        spec->vendor_nid = vendor_nid;
        spec->port_map = port_map;
        spec->port_num = port_num;
        spec->intel_hsw_fixup = true;
        spec->dev_num = dev_num;

        intel_haswell_enable_all_pins(codec, true);
        intel_haswell_fixup_enable_dp12(codec);

        codec->display_power_control = 1;

        codec->patch_ops.set_power_state = haswell_set_power_state;
        codec->depop_delay = 0;
        codec->auto_runtime_pm = 1;

        spec->ops.setup_stream = i915_hsw_setup_stream;
        spec->ops.pin_cvt_fixup = i915_pin_cvt_fixup;

        /*
         * Enable silent stream feature, if it is enabled via
         * module param or Kconfig option
         */
        if (enable_silent_stream)
                spec->send_silent_stream = true;

        return parse_intel_hdmi(codec);
}

static int patch_i915_hsw_hdmi(struct hda_codec *codec)
{
        return intel_hsw_common_init(codec, 0x08, NULL, 0, 3);
}

static int patch_i915_glk_hdmi(struct hda_codec *codec)
{
        return intel_hsw_common_init(codec, 0x0b, NULL, 0, 3);
}

static int patch_i915_icl_hdmi(struct hda_codec *codec)
{