// SPDX-License-Identifier: GPL-2.0-only
/*
 * ALSA SoC codec for HDMI encoder drivers
 * Copyright (C) 2015 Texas Instruments Incorporated - https://www.ti.com/
 * Author: Jyri Sarha <jsarha@ti.com>
 */
#include <linux/module.h>
#include <linux/string.h>
#include <sound/core.h>
#include <sound/jack.h>
#include <sound/pcm.h>
#include <sound/pcm_params.h>
#include <sound/soc.h>
#include <sound/tlv.h>
#include <sound/pcm_drm_eld.h>
#include <sound/hdmi-codec.h>
#include <sound/pcm_iec958.h>

#include <drm/drm_crtc.h> /* This is only to get MAX_ELD_BYTES */
#include <drm/drm_eld.h>

#define HDMI_CODEC_CHMAP_IDX_UNKNOWN  -1

/*
 * CEA speaker placement for HDMI 1.4:
 *
 *  FL  FLC   FC   FRC   FR   FRW
 *
 *                                  LFE
 *
 *  RL  RLC   RC   RRC   RR
 *
 *  Speaker placement has to be extended to support HDMI 2.0
 */
enum hdmi_codec_cea_spk_placement {
        FL  = BIT(0),   /* Front Left           */
        FC  = BIT(1),   /* Front Center         */
        FR  = BIT(2),   /* Front Right          */
        FLC = BIT(3),   /* Front Left Center    */
        FRC = BIT(4),   /* Front Right Center   */
        RL  = BIT(5),   /* Rear Left            */
        RC  = BIT(6),   /* Rear Center          */
        RR  = BIT(7),   /* Rear Right           */
        RLC = BIT(8),   /* Rear Left Center     */
        RRC = BIT(9),   /* Rear Right Center    */
        LFE = BIT(10),  /* Low Frequency Effect */
};

/*
 * cea Speaker allocation structure
 */
struct hdmi_codec_cea_spk_alloc {
        const int ca_id;
        unsigned int n_ch;
        unsigned long mask;
};

/* Channel maps  stereo HDMI */
static const struct snd_pcm_chmap_elem hdmi_codec_stereo_chmaps[] = {
        { .channels = 2,
          .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR } },
        { }
};

/* Channel maps for multi-channel playbacks, up to 8 n_ch */
static const struct snd_pcm_chmap_elem hdmi_codec_8ch_chmaps[] = {
        { .channels = 2, /* CA_ID 0x00 */
          .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR } },
        { .channels = 4, /* CA_ID 0x01 */
          .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, SNDRV_CHMAP_LFE,
                   SNDRV_CHMAP_NA } },
        { .channels = 4, /* CA_ID 0x02 */
          .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, SNDRV_CHMAP_NA,
                   SNDRV_CHMAP_FC } },
        { .channels = 4, /* CA_ID 0x03 */
          .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, SNDRV_CHMAP_LFE,
                   SNDRV_CHMAP_FC } },
        { .channels = 6, /* CA_ID 0x04 */
          .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, SNDRV_CHMAP_NA,
                   SNDRV_CHMAP_NA, SNDRV_CHMAP_RC, SNDRV_CHMAP_NA } },
        { .channels = 6, /* CA_ID 0x05 */
          .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, SNDRV_CHMAP_LFE,
                   SNDRV_CHMAP_NA, SNDRV_CHMAP_RC, SNDRV_CHMAP_NA } },
        { .channels = 6, /* CA_ID 0x06 */
          .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, SNDRV_CHMAP_NA,
                   SNDRV_CHMAP_FC, SNDRV_CHMAP_RC, SNDRV_CHMAP_NA } },
        { .channels = 6, /* CA_ID 0x07 */
          .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, SNDRV_CHMAP_LFE,
                   SNDRV_CHMAP_FC, SNDRV_CHMAP_RC, SNDRV_CHMAP_NA } },
        { .channels = 6, /* CA_ID 0x08 */
          .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, SNDRV_CHMAP_NA,
                   SNDRV_CHMAP_NA, SNDRV_CHMAP_RL, SNDRV_CHMAP_RR } },
        { .channels = 6, /* CA_ID 0x09 */
          .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, SNDRV_CHMAP_LFE,
                   SNDRV_CHMAP_NA, SNDRV_CHMAP_RL, SNDRV_CHMAP_RR } },
        { .channels = 6, /* CA_ID 0x0A */
          .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, SNDRV_CHMAP_NA,
                   SNDRV_CHMAP_FC, SNDRV_CHMAP_RL, SNDRV_CHMAP_RR } },
        { .channels = 6, /* CA_ID 0x0B */
          .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, SNDRV_CHMAP_LFE,
                   SNDRV_CHMAP_FC, SNDRV_CHMAP_RL, SNDRV_CHMAP_RR } },
        { .channels = 8, /* CA_ID 0x0C */
          .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, SNDRV_CHMAP_NA,
                   SNDRV_CHMAP_NA, SNDRV_CHMAP_RL, SNDRV_CHMAP_RR,
                   SNDRV_CHMAP_RC, SNDRV_CHMAP_NA } },
        { .channels = 8, /* CA_ID 0x0D */
          .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, SNDRV_CHMAP_LFE,
                   SNDRV_CHMAP_NA, SNDRV_CHMAP_RL, SNDRV_CHMAP_RR,
                   SNDRV_CHMAP_RC, SNDRV_CHMAP_NA } },
        { .channels = 8, /* CA_ID 0x0E */
          .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, SNDRV_CHMAP_NA,
                   SNDRV_CHMAP_FC, SNDRV_CHMAP_RL, SNDRV_CHMAP_RR,
                   SNDRV_CHMAP_RC, SNDRV_CHMAP_NA } },
        { .channels = 8, /* CA_ID 0x0F */
          .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, SNDRV_CHMAP_LFE,
                   SNDRV_CHMAP_FC, SNDRV_CHMAP_RL, SNDRV_CHMAP_RR,
                   SNDRV_CHMAP_RC, SNDRV_CHMAP_NA } },
        { .channels = 8, /* CA_ID 0x10 */
          .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, SNDRV_CHMAP_NA,
                   SNDRV_CHMAP_NA, SNDRV_CHMAP_RL, SNDRV_CHMAP_RR,
                   SNDRV_CHMAP_RLC, SNDRV_CHMAP_RRC } },
        { .channels = 8, /* CA_ID 0x11 */
          .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, SNDRV_CHMAP_LFE,
                   SNDRV_CHMAP_NA, SNDRV_CHMAP_RL, SNDRV_CHMAP_RR,
                   SNDRV_CHMAP_RLC, SNDRV_CHMAP_RRC } },
        { .channels = 8, /* CA_ID 0x12 */
          .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, SNDRV_CHMAP_NA,
                   SNDRV_CHMAP_FC, SNDRV_CHMAP_RL, SNDRV_CHMAP_RR,
                   SNDRV_CHMAP_RLC, SNDRV_CHMAP_RRC } },
        { .channels = 8, /* CA_ID 0x13 */
          .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, SNDRV_CHMAP_LFE,
                   SNDRV_CHMAP_FC, SNDRV_CHMAP_RL, SNDRV_CHMAP_RR,
                   SNDRV_CHMAP_RLC, SNDRV_CHMAP_RRC } },
        { .channels = 8, /* CA_ID 0x14 */
          .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, SNDRV_CHMAP_NA,
                   SNDRV_CHMAP_NA, SNDRV_CHMAP_NA, SNDRV_CHMAP_NA,
                   SNDRV_CHMAP_FLC, SNDRV_CHMAP_FRC } },
        { .channels = 8, /* CA_ID 0x15 */
          .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, SNDRV_CHMAP_LFE,
                   SNDRV_CHMAP_NA, SNDRV_CHMAP_NA, SNDRV_CHMAP_NA,
                   SNDRV_CHMAP_FLC, SNDRV_CHMAP_FRC } },
        { .channels = 8, /* CA_ID 0x16 */
          .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, SNDRV_CHMAP_NA,
                   SNDRV_CHMAP_FC, SNDRV_CHMAP_NA, SNDRV_CHMAP_NA,
                   SNDRV_CHMAP_FLC, SNDRV_CHMAP_FRC } },
        { .channels = 8, /* CA_ID 0x17 */
          .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, SNDRV_CHMAP_LFE,
                   SNDRV_CHMAP_FC, SNDRV_CHMAP_NA, SNDRV_CHMAP_NA,
                   SNDRV_CHMAP_FLC, SNDRV_CHMAP_FRC } },
        { .channels = 8, /* CA_ID 0x18 */
          .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, SNDRV_CHMAP_NA,
                   SNDRV_CHMAP_NA, SNDRV_CHMAP_NA, SNDRV_CHMAP_NA,
                   SNDRV_CHMAP_FLC, SNDRV_CHMAP_FRC } },
        { .channels = 8, /* CA_ID 0x19 */
          .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, SNDRV_CHMAP_LFE,
                   SNDRV_CHMAP_NA, SNDRV_CHMAP_NA, SNDRV_CHMAP_NA,
                   SNDRV_CHMAP_FLC, SNDRV_CHMAP_FRC } },
        { .channels = 8, /* CA_ID 0x1A */
          .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, SNDRV_CHMAP_NA,
                   SNDRV_CHMAP_FC, SNDRV_CHMAP_NA, SNDRV_CHMAP_NA,
                   SNDRV_CHMAP_FLC, SNDRV_CHMAP_FRC } },
        { .channels = 8, /* CA_ID 0x1B */
          .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, SNDRV_CHMAP_LFE,
                   SNDRV_CHMAP_FC, SNDRV_CHMAP_NA, SNDRV_CHMAP_NA,
                   SNDRV_CHMAP_FLC, SNDRV_CHMAP_FRC } },
        { .channels = 8, /* CA_ID 0x1C */
          .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, SNDRV_CHMAP_NA,
                   SNDRV_CHMAP_NA, SNDRV_CHMAP_NA, SNDRV_CHMAP_NA,
                   SNDRV_CHMAP_FLC, SNDRV_CHMAP_FRC } },
        { .channels = 8, /* CA_ID 0x1D */
          .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, SNDRV_CHMAP_LFE,
                   SNDRV_CHMAP_NA, SNDRV_CHMAP_NA, SNDRV_CHMAP_NA,
                   SNDRV_CHMAP_FLC, SNDRV_CHMAP_FRC } },
        { .channels = 8, /* CA_ID 0x1E */
          .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, SNDRV_CHMAP_NA,
                   SNDRV_CHMAP_FC, SNDRV_CHMAP_NA, SNDRV_CHMAP_NA,
                   SNDRV_CHMAP_FLC, SNDRV_CHMAP_FRC } },
        { .channels = 8, /* CA_ID 0x1F */
          .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, SNDRV_CHMAP_LFE,
                   SNDRV_CHMAP_FC, SNDRV_CHMAP_NA, SNDRV_CHMAP_NA,
                   SNDRV_CHMAP_FLC, SNDRV_CHMAP_FRC } },
        { }
};

/*
 * hdmi_codec_channel_alloc: speaker configuration available for CEA
 *
 * This is an ordered list where ca_id must exist in hdmi_codec_8ch_chmaps
 * The preceding ones have better chances to be selected by
 * hdmi_codec_get_ch_alloc_table_idx().
 */
static const struct hdmi_codec_cea_spk_alloc hdmi_codec_channel_alloc[] = {
        { .ca_id = 0x00, .n_ch = 2,
          .mask = FL | FR },
        { .ca_id = 0x03, .n_ch = 4,
          .mask = FL | FR | LFE | FC },
        { .ca_id = 0x02, .n_ch = 4,
          .mask = FL | FR | FC },
        { .ca_id = 0x01, .n_ch = 4,
          .mask = FL | FR | LFE },
        { .ca_id = 0x0b, .n_ch = 6,
          .mask = FL | FR | LFE | FC | RL | RR },
        { .ca_id = 0x0a, .n_ch = 6,
          .mask = FL | FR | FC | RL | RR },
        { .ca_id = 0x09, .n_ch = 6,
          .mask = FL | FR | LFE | RL | RR },
        { .ca_id = 0x08, .n_ch = 6,
          .mask = FL | FR | RL | RR },
        { .ca_id = 0x07, .n_ch = 6,
          .mask = FL | FR | LFE | FC | RC },
        { .ca_id = 0x06, .n_ch = 6,
          .mask = FL | FR | FC | RC },
        { .ca_id = 0x05, .n_ch = 6,
          .mask = FL | FR | LFE | RC },
        { .ca_id = 0x04, .n_ch = 6,
          .mask = FL | FR | RC },
        { .ca_id = 0x13, .n_ch = 8,
          .mask = FL | FR | LFE | FC | RL | RR | RLC | RRC },
        { .ca_id = 0x1f, .n_ch = 8,
          .mask = FL | FR | LFE | FC | RL | RR | FLC | FRC },
        { .ca_id = 0x12, .n_ch = 8,
          .mask = FL | FR | FC | RL | RR | RLC | RRC },
        { .ca_id = 0x1e, .n_ch = 8,
          .mask = FL | FR | FC | RL | RR | FLC | FRC },
        { .ca_id = 0x11, .n_ch = 8,
          .mask = FL | FR | LFE | RL | RR | RLC | RRC },
        { .ca_id = 0x1d, .n_ch = 8,
          .mask = FL | FR | LFE | RL | RR | FLC | FRC },
        { .ca_id = 0x10, .n_ch = 8,
          .mask = FL | FR | RL | RR | RLC | RRC },
        { .ca_id = 0x1c, .n_ch = 8,
          .mask = FL | FR | RL | RR | FLC | FRC },
        { .ca_id = 0x0f, .n_ch = 8,
          .mask = FL | FR | LFE | FC | RL | RR | RC },
        { .ca_id = 0x1b, .n_ch = 8,
          .mask = FL | FR | LFE | RC | FC | FLC | FRC },
        { .ca_id = 0x0e, .n_ch = 8,
          .mask = FL | FR | FC | RL | RR | RC },
        { .ca_id = 0x1a, .n_ch = 8,
          .mask = FL | FR | RC | FC | FLC | FRC },
        { .ca_id = 0x0d, .n_ch = 8,
          .mask = FL | FR | LFE | RL | RR | RC },
        { .ca_id = 0x19, .n_ch = 8,
          .mask = FL | FR | LFE | RC | FLC | FRC },
        { .ca_id = 0x0c, .n_ch = 8,
          .mask = FL | FR | RC | RL | RR },
        { .ca_id = 0x18, .n_ch = 8,
          .mask = FL | FR | RC | FLC | FRC },
        { .ca_id = 0x17, .n_ch = 8,
          .mask = FL | FR | LFE | FC | FLC | FRC },
        { .ca_id = 0x16, .n_ch = 8,
          .mask = FL | FR | FC | FLC | FRC },
        { .ca_id = 0x15, .n_ch = 8,
          .mask = FL | FR | LFE | FLC | FRC },
        { .ca_id = 0x14, .n_ch = 8,
          .mask = FL | FR | FLC | FRC },
        { .ca_id = 0x0b, .n_ch = 8,
          .mask = FL | FR | LFE | FC | RL | RR },
        { .ca_id = 0x0a, .n_ch = 8,
          .mask = FL | FR | FC | RL | RR },
        { .ca_id = 0x09, .n_ch = 8,
          .mask = FL | FR | LFE | RL | RR },
        { .ca_id = 0x08, .n_ch = 8,
          .mask = FL | FR | RL | RR },
        { .ca_id = 0x07, .n_ch = 8,
          .mask = FL | FR | LFE | FC | RC },
        { .ca_id = 0x06, .n_ch = 8,
          .mask = FL | FR | FC | RC },
        { .ca_id = 0x05, .n_ch = 8,
          .mask = FL | FR | LFE | RC },
        { .ca_id = 0x04, .n_ch = 8,
          .mask = FL | FR | RC },
        { .ca_id = 0x03, .n_ch = 8,
          .mask = FL | FR | LFE | FC },
        { .ca_id = 0x02, .n_ch = 8,
          .mask = FL | FR | FC },
        { .ca_id = 0x01, .n_ch = 8,
          .mask = FL | FR | LFE },
};

struct hdmi_codec_priv {
        struct hdmi_codec_pdata hcd;
        uint8_t eld[MAX_ELD_BYTES];
        struct snd_parsed_hdmi_eld eld_parsed;
        struct snd_pcm_chmap *chmap_info;
        unsigned int chmap_idx;
        struct mutex lock;
        bool busy;
        struct snd_soc_jack *jack;
        unsigned int jack_status;
        u8 iec_status[AES_IEC958_STATUS_SIZE];
        struct snd_info_entry *proc_entry;
};

static const struct snd_soc_dapm_widget hdmi_widgets[] = {
        SND_SOC_DAPM_OUTPUT("TX"),
        SND_SOC_DAPM_OUTPUT("RX"),
};

enum {
        DAI_ID_I2S = 0,
        DAI_ID_SPDIF,
};

static int hdmi_eld_ctl_info(struct snd_kcontrol *kcontrol,
                             struct snd_ctl_elem_info *uinfo)
{
        uinfo->type = SNDRV_CTL_ELEM_TYPE_BYTES;
        uinfo->count = sizeof_field(struct hdmi_codec_priv, eld);

        return 0;
}

static int hdmi_eld_ctl_get(struct snd_kcontrol *kcontrol,
                            struct snd_ctl_elem_value *ucontrol)
{
        struct snd_soc_component *component = snd_kcontrol_chip(kcontrol);
        struct hdmi_codec_priv *hcp = snd_soc_component_get_drvdata(component);

        memcpy(ucontrol->value.bytes.data, hcp->eld, sizeof(hcp->eld));

        return 0;
}

static unsigned long hdmi_codec_spk_mask_from_alloc(int spk_alloc)
{
        int i;
        static const unsigned long hdmi_codec_eld_spk_alloc_bits[] = {
                [0] = FL | FR, [1] = LFE, [2] = FC, [3] = RL | RR,
                [4] = RC, [5] = FLC | FRC, [6] = RLC | RRC,
        };
        unsigned long spk_mask = 0;

        for (i = 0; i < ARRAY_SIZE(hdmi_codec_eld_spk_alloc_bits); i++) {
                if (spk_alloc & (1 << i))
                        spk_mask |= hdmi_codec_eld_spk_alloc_bits[i];
        }

        return spk_mask;
}

static void hdmi_codec_eld_chmap(struct hdmi_codec_priv *hcp)
{
        u8 spk_alloc;
        unsigned long spk_mask;

        spk_alloc = drm_eld_get_spk_alloc(hcp->eld);
        spk_mask = hdmi_codec_spk_mask_from_alloc(spk_alloc);

        /* Detect if only stereo supported, else return 8 channels mappings */
        if ((spk_mask & ~(FL | FR)) && hcp->chmap_info->max_channels > 2)
                hcp->chmap_info->chmap = hdmi_codec_8ch_chmaps;
        else
                hcp->chmap_info->chmap = hdmi_codec_stereo_chmaps;
}

static int hdmi_codec_get_ch_alloc_table_idx(struct hdmi_codec_priv *hcp,
                                             unsigned char channels)
{
        int i;
        u8 spk_alloc;
        unsigned long spk_mask;
        const struct hdmi_codec_cea_spk_alloc *cap = hdmi_codec_channel_alloc;

        spk_alloc = drm_eld_get_spk_alloc(hcp->eld);
        spk_mask = hdmi_codec_spk_mask_from_alloc(spk_alloc);

        for (i = 0; i < ARRAY_SIZE(hdmi_codec_channel_alloc); i++, cap++) {
                /* If spk_alloc == 0, HDMI is unplugged return stereo config*/
                if (!spk_alloc && cap->ca_id == 0)
                        return i;
                if (cap->n_ch != channels)
                        continue;
                if (!(cap->mask == (spk_mask & cap->mask)))
                        continue;
                return i;
        }

        return -EINVAL;
}
static int hdmi_codec_chmap_ctl_get(struct snd_kcontrol *kcontrol,
                              struct snd_ctl_elem_value *ucontrol)
{
        unsigned const char *map;
        unsigned int i;
        struct snd_pcm_chmap *info = snd_kcontrol_chip(kcontrol);
        struct hdmi_codec_priv *hcp = info->private_data;

        if (hcp->chmap_idx != HDMI_CODEC_CHMAP_IDX_UNKNOWN)
                map = info->chmap[hcp->chmap_idx].map;

        for (i = 0; i < info->max_channels; i++) {
                if (hcp->chmap_idx == HDMI_CODEC_CHMAP_IDX_UNKNOWN)
                        ucontrol->value.integer.value[i] = 0;
                else
                        ucontrol->value.integer.value[i] = map[i];
        }

        return 0;
}

static int hdmi_codec_iec958_info(struct snd_kcontrol *kcontrol,
                                  struct snd_ctl_elem_info *uinfo)
{
        uinfo->type = SNDRV_CTL_ELEM_TYPE_IEC958;
        uinfo->count = 1;
        return 0;
}

static int hdmi_codec_iec958_default_get(struct snd_kcontrol *kcontrol,
                                         struct snd_ctl_elem_value *ucontrol)
{
        struct snd_soc_component *component = snd_kcontrol_chip(kcontrol);
        struct hdmi_codec_priv *hcp = snd_soc_component_get_drvdata(component);

        memcpy(ucontrol->value.iec958.status, hcp->iec_status,
               sizeof(hcp->iec_status));

        return 0;
}

static int hdmi_codec_iec958_default_put(struct snd_kcontrol *kcontrol,
                                         struct snd_ctl_elem_value *ucontrol)
{
        struct snd_soc_component *component = snd_kcontrol_chip(kcontrol);
        struct hdmi_codec_priv *hcp = snd_soc_component_get_drvdata(component);

        memcpy(hcp->iec_status, ucontrol->value.iec958.status,
               sizeof(hcp->iec_status));

        return 0;
}

static int hdmi_codec_iec958_mask_get(struct snd_kcontrol *kcontrol,
                                      struct snd_ctl_elem_value *ucontrol)
{
        memset(ucontrol->value.iec958.status, 0xff,
               sizeof_field(struct hdmi_codec_priv, iec_status));

        return 0;
}

static int hdmi_codec_startup(struct snd_pcm_substream *substream,
                              struct snd_soc_dai *dai)
{
        struct hdmi_codec_priv *hcp = snd_soc_dai_get_drvdata(dai);
        bool tx = substream->stream == SNDRV_PCM_STREAM_PLAYBACK;
        bool has_capture = !hcp->hcd.no_i2s_capture;
        bool has_playback = !hcp->hcd.no_i2s_playback;
        int ret = 0;

        if (!((has_playback && tx) || (has_capture && !tx)))
                return 0;

        mutex_lock(&hcp->lock);
        if (hcp->busy) {
                dev_err(dai->dev, "Only one simultaneous stream supported!\n");
                mutex_unlock(&hcp->lock);
                return -EINVAL;
        }

        if (hcp->hcd.ops->audio_startup) {
                ret = hcp->hcd.ops->audio_startup(dai->dev->parent, hcp->hcd.data);
                if (ret)
                        goto err;
        }

        if (tx && hcp->hcd.ops->get_eld) {
                ret = hcp->hcd.ops->get_eld(dai->dev->parent, hcp->hcd.data,
                                            hcp->eld, sizeof(hcp->eld));
                if (ret)
                        goto err;

                snd_parse_eld(dai->dev, &hcp->eld_parsed,
                              hcp->eld, sizeof(hcp->eld));

                ret = snd_pcm_hw_constraint_eld(substream->runtime, hcp->eld);
                if (ret)
                        goto err;

                /* Select chmap supported */
                hdmi_codec_eld_chmap(hcp);
        }

        hcp->busy = true;

err:
        mutex_unlock(&hcp->lock);
        return ret;
}

static void hdmi_codec_shutdown(struct snd_pcm_substream *substream,
                                struct snd_soc_dai *dai)
{
        struct hdmi_codec_priv *hcp = snd_soc_dai_get_drvdata(dai);
        bool tx = substream->stream == SNDRV_PCM_STREAM_PLAYBACK;
        bool has_capture = !hcp->hcd.no_i2s_capture;
        bool has_playback = !hcp->hcd.no_i2s_playback;

        if (!((has_playback && tx) || (has_capture && !tx)))
                return;

        hcp->chmap_idx = HDMI_CODEC_CHMAP_IDX_UNKNOWN;
        hcp->hcd.ops->audio_shutdown(dai->dev->parent, hcp->hcd.data);

        mutex_lock(&hcp->lock);
        hcp->busy = false;
        mutex_unlock(&hcp->lock);
}

static int hdmi_codec_fill_codec_params(struct snd_soc_dai *dai,
                                        unsigned int sample_width,
                                        unsigned int sample_rate,
                                        unsigned int channels,
                                        struct hdmi_codec_params *hp)
{
        struct hdmi_codec_priv *hcp = snd_soc_dai_get_drvdata(dai);
        int idx = HDMI_CODEC_CHMAP_IDX_UNKNOWN;
        u8 ca_id = 0;
        bool pcm_audio = !(hcp->iec_status[0] & IEC958_AES0_NONAUDIO);

        if (pcm_audio) {
                /* Select a channel allocation that matches with ELD and pcm channels */
                idx = hdmi_codec_get_ch_alloc_table_idx(hcp, channels);

                if (idx < 0) {
                        dev_err(dai->dev, "Not able to map channels to speakers (%d)\n",
                                idx);
                        hcp->chmap_idx = HDMI_CODEC_CHMAP_IDX_UNKNOWN;
                        return idx;
                }

                ca_id = hdmi_codec_channel_alloc[idx].ca_id;
        }

        memset(hp, 0, sizeof(*hp));

        hdmi_audio_infoframe_init(&hp->cea);

        if (pcm_audio)
                hp->cea.channels = channels;
        else
                hp->cea.channels = 0;

        hp->cea.coding_type = HDMI_AUDIO_CODING_TYPE_STREAM;
        hp->cea.sample_size = HDMI_AUDIO_SAMPLE_SIZE_STREAM;
        hp->cea.sample_frequency = HDMI_AUDIO_SAMPLE_FREQUENCY_STREAM;
        hp->cea.channel_allocation = ca_id;

        hp->sample_width = sample_width;
        hp->sample_rate = sample_rate;
        hp->channels = channels;

        if (pcm_audio)
                hcp->chmap_idx = ca_id;
        else
                hcp->chmap_idx = HDMI_CODEC_CHMAP_IDX_UNKNOWN;

        return 0;
}

static int hdmi_codec_hw_params(struct snd_pcm_substream *substream,
                                struct snd_pcm_hw_params *params,
                                struct snd_soc_dai *dai)
{
        struct hdmi_codec_priv *hcp = snd_soc_dai_get_drvdata(dai);
        struct hdmi_codec_daifmt *cf = snd_soc_dai_dma_data_get_playback(dai);
        struct hdmi_codec_params hp = {
                .iec = {
                        .status = { 0 },
                        .subcode = { 0 },
                        .pad = 0,
                        .dig_subframe = { 0 },
                }
        };
        int ret;

        if (!hcp->hcd.ops->hw_params)
                return 0;

        dev_dbg(dai->dev, "%s() width %d rate %d channels %d\n", __func__,
                params_width(params), params_rate(params),
                params_channels(params));

        ret = hdmi_codec_fill_codec_params(dai,
                                           params_width(params),
                                           params_rate(params),
                                           params_channels(params),
                                           &hp);
        if (ret < 0)
                return ret;

        memcpy(hp.iec.status, hcp->iec_status, sizeof(hp.iec.status));
        ret = snd_pcm_fill_iec958_consumer_hw_params(params, hp.iec.status,
                                                     sizeof(hp.iec.status));
        if (ret < 0) {
                dev_err(dai->dev, "Creating IEC958 channel status failed %d\n",
                        ret);
                return ret;
        }

        cf->bit_fmt = params_format(params);
        return hcp->hcd.ops->hw_params(dai->dev->parent, hcp->hcd.data,
                                       cf, &hp);
}

static int hdmi_codec_prepare(struct snd_pcm_substream *substream,
                              struct snd_soc_dai *dai)
{
        struct hdmi_codec_priv *hcp = snd_soc_dai_get_drvdata(dai);
        struct hdmi_codec_daifmt *cf = snd_soc_dai_dma_data_get_playback(dai);
        struct snd_pcm_runtime *runtime = substream->runtime;
        unsigned int channels = runtime->channels;
        unsigned int width = snd_pcm_format_width(runtime->format);
        unsigned int rate = runtime->rate;
        struct hdmi_codec_params hp;
        int ret;

        if (!hcp->hcd.ops->prepare)
                return 0;

        dev_dbg(dai->dev, "%s() width %d rate %d channels %d\n", __func__,
                width, rate, channels);

        ret = hdmi_codec_fill_codec_params(dai, width, rate, channels, &hp);
        if (ret < 0)
                return ret;

        memcpy(hp.iec.status, hcp->iec_status, sizeof(hp.iec.status));
        ret = snd_pcm_fill_iec958_consumer(runtime, hp.iec.status,
                                           sizeof(hp.iec.status));
        if (ret < 0) {
                dev_err(dai->dev, "Creating IEC958 channel status failed %d\n",
                        ret);
                return ret;
        }

        cf->bit_fmt = runtime->format;
        return hcp->hcd.ops->prepare(dai->dev->parent, hcp->hcd.data,
                                     cf, &hp);
}

static int hdmi_codec_i2s_set_fmt(struct snd_soc_dai *dai,
                                  unsigned int fmt)
{
        struct hdmi_codec_daifmt *cf = snd_soc_dai_dma_data_get_playback(dai);

        /* Reset daifmt */
        memset(cf, 0, sizeof(*cf));

        switch (fmt & SND_SOC_DAIFMT_CLOCK_PROVIDER_MASK) {
        case SND_SOC_DAIFMT_CBP_CFP:
                cf->bit_clk_provider = 1;
                cf->frame_clk_provider = 1;
                break;
        case SND_SOC_DAIFMT_CBC_CFP:
                cf->frame_clk_provider = 1;
                break;
        case SND_SOC_DAIFMT_CBP_CFC:
                cf->bit_clk_provider = 1;
                break;
        case SND_SOC_DAIFMT_CBC_CFC:
                break;
        default:
                return -EINVAL;
        }

        switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
        case SND_SOC_DAIFMT_NB_NF:
                break;
        case SND_SOC_DAIFMT_NB_IF:
                cf->frame_clk_inv = 1;
                break;
        case SND_SOC_DAIFMT_IB_NF:
                cf->bit_clk_inv = 1;
                break;
        case SND_SOC_DAIFMT_IB_IF:
                cf->frame_clk_inv = 1;
                cf->bit_clk_inv = 1;
                break;
        }

        switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
        case SND_SOC_DAIFMT_I2S:
                cf->fmt = HDMI_I2S;
                break;
        case SND_SOC_DAIFMT_DSP_A:
                cf->fmt = HDMI_DSP_A;
                break;
        case SND_SOC_DAIFMT_DSP_B:
                cf->fmt = HDMI_DSP_B;
                break;
        case SND_SOC_DAIFMT_RIGHT_J:
                cf->fmt = HDMI_RIGHT_J;
                break;
        case SND_SOC_DAIFMT_LEFT_J:
                cf->fmt = HDMI_LEFT_J;
                break;
        case SND_SOC_DAIFMT_AC97:
                cf->fmt = HDMI_AC97;
                break;
        default:
                dev_err(dai->dev, "Invalid DAI interface format\n");
                return -EINVAL;
        }

        return 0;
}

static int hdmi_codec_mute(struct snd_soc_dai *dai, int mute, int direction)
{
        struct hdmi_codec_priv *hcp = snd_soc_dai_get_drvdata(dai);

        /*
         * ignore if direction was CAPTURE
         * and it had .no_capture_mute flag
         * see
         *      snd_soc_dai_digital_mute()
         */
        if (hcp->hcd.ops->mute_stream &&
            (direction == SNDRV_PCM_STREAM_PLAYBACK ||
             !hcp->hcd.no_capture_mute))
                return hcp->hcd.ops->mute_stream(dai->dev->parent,
                                                 hcp->hcd.data,
                                                 mute, direction);

        return -ENOTSUPP;
}

/*
 * This driver can select all SND_SOC_DAIFMT_CBx_CFx,
 * but need to be selected from Sound Card, not be auto selected.
 * Because it might be used from other driver.
 * For example,
 *      ${LINUX}/drivers/gpu/drm/bridge/synopsys/dw-hdmi-i2s-audio.c
 */
static const u64 hdmi_codec_formats =
        SND_SOC_POSSIBLE_DAIFMT_NB_NF   |
        SND_SOC_POSSIBLE_DAIFMT_NB_IF   |
        SND_SOC_POSSIBLE_DAIFMT_IB_NF   |
        SND_SOC_POSSIBLE_DAIFMT_IB_IF   |
        SND_SOC_POSSIBLE_DAIFMT_I2S     |
        SND_SOC_POSSIBLE_DAIFMT_DSP_A   |
        SND_SOC_POSSIBLE_DAIFMT_DSP_B   |
        SND_SOC_POSSIBLE_DAIFMT_RIGHT_J |
        SND_SOC_POSSIBLE_DAIFMT_LEFT_J  |
        SND_SOC_POSSIBLE_DAIFMT_AC97;

#define HDMI_RATES      (SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_44100 |\
                         SNDRV_PCM_RATE_48000 | SNDRV_PCM_RATE_88200 |\
                         SNDRV_PCM_RATE_96000 | SNDRV_PCM_RATE_176400 |\
                         SNDRV_PCM_RATE_192000)

#define SPDIF_FORMATS   (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE |\
                         SNDRV_PCM_FMTBIT_S24_3LE | SNDRV_PCM_FMTBIT_S24_LE)

/*
 * This list is only for formats allowed on the I2S bus. So there is
 * some formats listed that are not supported by HDMI interface. For
 * instance allowing the 32-bit formats enables 24-precision with CPU
 * DAIs that do not support 24-bit formats. If the extra formats cause
 * problems, we should add the video side driver an option to disable
 * them.
 */
#define I2S_FORMATS     (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE |\
                         SNDRV_PCM_FMTBIT_S24_3LE | SNDRV_PCM_FMTBIT_S24_LE |\
                         SNDRV_PCM_FMTBIT_S32_LE | SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_LE)

static struct snd_kcontrol_new hdmi_codec_controls[] = {
        {
                .access = SNDRV_CTL_ELEM_ACCESS_READ,
                .iface = SNDRV_CTL_ELEM_IFACE_PCM,
                .name = SNDRV_CTL_NAME_IEC958("", PLAYBACK, MASK),
                .info = hdmi_codec_iec958_info,
                .get = hdmi_codec_iec958_mask_get,
        },
        {
                .iface = SNDRV_CTL_ELEM_IFACE_PCM,
                .name = SNDRV_CTL_NAME_IEC958("", PLAYBACK, DEFAULT),
                .info = hdmi_codec_iec958_info,
                .get = hdmi_codec_iec958_default_get,
                .put = hdmi_codec_iec958_default_put,
        },
        {
                .access = (SNDRV_CTL_ELEM_ACCESS_READ |
                           SNDRV_CTL_ELEM_ACCESS_VOLATILE),
                .iface  = SNDRV_CTL_ELEM_IFACE_PCM,
                .name   = "ELD",
                .info   = hdmi_eld_ctl_info,
                .get    = hdmi_eld_ctl_get,
        },
};

static int hdmi_codec_pcm_new(struct snd_soc_pcm_runtime *rtd,
                              struct snd_soc_dai *dai)
{
        struct snd_soc_dai_driver *drv = dai->driver;
        struct hdmi_codec_priv *hcp = snd_soc_dai_get_drvdata(dai);
        unsigned int i;
        int ret;

        ret =  snd_pcm_add_chmap_ctls(rtd->pcm, SNDRV_PCM_STREAM_PLAYBACK,
                                      NULL, drv->playback.channels_max, 0,
                                      &hcp->chmap_info);
        if (ret < 0)
                return ret;

        /* override handlers */
        hcp->chmap_info->private_data = hcp;
        hcp->chmap_info->kctl->get = hdmi_codec_chmap_ctl_get;

        /* default chmap supported is stereo */
        hcp->chmap_info->chmap = hdmi_codec_stereo_chmaps;
        hcp->chmap_idx = HDMI_CODEC_CHMAP_IDX_UNKNOWN;

        for (i = 0; i < ARRAY_SIZE(hdmi_codec_controls); i++) {
                struct snd_kcontrol *kctl;

                /* add ELD ctl with the device number corresponding to the PCM stream */
                kctl = snd_ctl_new1(&hdmi_codec_controls[i], dai->component);
                if (!kctl)
                        return -ENOMEM;

                kctl->id.device = rtd->pcm->device;
                ret = snd_ctl_add(rtd->card->snd_card, kctl);
                if (ret < 0)
                        return ret;
        }

        return 0;
}

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

        snd_print_eld_info(&hcp->eld_parsed, buffer);
}

static int hdmi_dai_proc_new(struct hdmi_codec_priv *hcp,
                             struct snd_soc_dai *dai)
{
        struct snd_soc_component *component = dai->component;
        struct snd_soc_card *card = component->card;
        struct snd_soc_dai *d;
        struct snd_soc_pcm_runtime *rtd;
        struct snd_info_entry *entry;
        char name[32];
        int err, i, id = 0;

        /*
         * To avoid duplicate proc entry, find its rtd and use rtd->id
         * instead of dai->id
         */
        for_each_card_rtds(card, rtd) {
                for_each_rtd_dais(rtd, i, d)
                        if (d == dai) {
                                id = rtd->id;
                                goto found;
                        }
        }
found:
        snprintf(name, sizeof(name), "eld#%d", id);
        err = snd_card_proc_new(card->snd_card, name, &entry);
        if (err < 0)
                return err;

        snd_info_set_text_ops(entry, hcp, print_eld_info);
        hcp->proc_entry = entry;

        return 0;
}

static void hdmi_dai_proc_free(struct hdmi_codec_priv *hcp)
{
        snd_info_free_entry(hcp->proc_entry);
        hcp->proc_entry = NULL;
}
#else
static int hdmi_dai_proc_new(struct hdmi_codec_priv *hcp,
                             struct snd_soc_dai *dai)
{
        return 0;
}

static void hdmi_dai_proc_free(struct hdmi_codec_priv *hcp)
{
}
#endif

static int hdmi_dai_probe(struct snd_soc_dai *dai)
{
        struct hdmi_codec_priv *hcp =
                snd_soc_component_get_drvdata(dai->component);
        struct snd_soc_dapm_context *dapm;
        struct hdmi_codec_daifmt *daifmt;
        struct snd_soc_dapm_route route[] = {
                {
                        .sink = "TX",
                        .source = dai->driver->playback.stream_name,
                },
                {
                        .sink = dai->driver->capture.stream_name,
                        .source = "RX",
                },
        };
        int ret, i;

        dapm = snd_soc_component_to_dapm(dai->component);

        /* One of the directions might be omitted for unidirectional DAIs */
        for (i = 0; i < ARRAY_SIZE(route); i++) {
                if (!route[i].source || !route[i].sink)
                        continue;

                ret = snd_soc_dapm_add_routes(dapm, &route[i], 1);
                if (ret)
                        return ret;
        }

        daifmt = devm_kzalloc(dai->dev, sizeof(*daifmt), GFP_KERNEL);
        if (!daifmt)
                return -ENOMEM;

        snd_soc_dai_dma_data_set_playback(dai, daifmt);

        return hdmi_dai_proc_new(hcp, dai);
}

static int hdmi_dai_remove(struct snd_soc_dai *dai)
{
        struct hdmi_codec_priv *hcp =
                snd_soc_component_get_drvdata(dai->component);

        hdmi_dai_proc_free(hcp);
        return 0;
}

static void hdmi_codec_jack_report(struct hdmi_codec_priv *hcp,
                                   unsigned int jack_status)
{
        if (jack_status != hcp->jack_status) {
                if (hcp->jack)
                        snd_soc_jack_report(hcp->jack, jack_status, SND_JACK_AVOUT);
                hcp->jack_status = jack_status;
        }
}

static void plugged_cb(struct device *dev, bool plugged)
{
        struct hdmi_codec_priv *hcp = dev_get_drvdata(dev);
        int ret;

        if (plugged) {
                if (hcp->hcd.ops->get_eld) {
                        hcp->hcd.ops->get_eld(dev->parent, hcp->hcd.data,
                                            hcp->eld, sizeof(hcp->eld));
                        ret = snd_parse_eld(dev, &hcp->eld_parsed,
                                            hcp->eld, sizeof(hcp->eld));
                        if (ret < 0)
                                dev_dbg(dev, "Failed to parse ELD: %d\n", ret);
                        else
                                snd_show_eld(dev, &hcp->eld_parsed);
                }
                hdmi_codec_jack_report(hcp, SND_JACK_AVOUT);
        } else {
                hdmi_codec_jack_report(hcp, 0);
                memset(hcp->eld, 0, sizeof(hcp->eld));
        }
}

static int hdmi_codec_set_jack(struct snd_soc_component *component,
                               struct snd_soc_jack *jack,
                               void *data)
{
        struct hdmi_codec_priv *hcp = snd_soc_component_get_drvdata(component);

        if (hcp->hcd.ops->hook_plugged_cb) {
                hcp->jack = jack;

                /*
                 * Report the initial jack status which may have been provided
                 * by the parent hdmi driver while the hpd hook was registered.
                 */
                snd_soc_jack_report(jack, hcp->jack_status, SND_JACK_AVOUT);

                return 0;
        }

        return -ENOTSUPP;
}

static int hdmi_dai_spdif_probe(struct snd_soc_dai *dai)
{
        struct hdmi_codec_daifmt *cf;
        int ret;

        ret = hdmi_dai_probe(dai);
        if (ret)
                return ret;

        cf = snd_soc_dai_dma_data_get_playback(dai);
        cf->fmt = HDMI_SPDIF;

        return 0;
}

static const struct snd_soc_dai_ops hdmi_codec_i2s_dai_ops = {
        .probe                          = hdmi_dai_probe,
        .remove                         = hdmi_dai_remove,
        .startup                        = hdmi_codec_startup,
        .shutdown                       = hdmi_codec_shutdown,
        .hw_params                      = hdmi_codec_hw_params,
        .prepare                        = hdmi_codec_prepare,
        .set_fmt                        = hdmi_codec_i2s_set_fmt,
        .mute_stream                    = hdmi_codec_mute,
        .pcm_new                        = hdmi_codec_pcm_new,
        .auto_selectable_formats        = &hdmi_codec_formats,
        .num_auto_selectable_formats    = 1,
};

static const struct snd_soc_dai_ops hdmi_codec_spdif_dai_ops = {
        .probe          = hdmi_dai_spdif_probe,
        .startup        = hdmi_codec_startup,
        .shutdown       = hdmi_codec_shutdown,
        .hw_params      = hdmi_codec_hw_params,
        .prepare        = hdmi_codec_prepare,
        .mute_stream    = hdmi_codec_mute,
        .pcm_new        = hdmi_codec_pcm_new,
};

static const struct snd_soc_dai_driver hdmi_i2s_dai = {
        .name = "i2s-hifi",
        .id = DAI_ID_I2S,
        .playback = {
                .stream_name = "I2S Playback",
                .channels_min = 2,
                .channels_max = 8,
                .rates = HDMI_RATES,
                .formats = I2S_FORMATS,
                .sig_bits = 24,
        },
        .capture = {
                .stream_name = "Capture",
                .channels_min = 2,
                .channels_max = 8,
                .rates = HDMI_RATES,
                .formats = I2S_FORMATS,
                .sig_bits = 24,
        },
        .ops = &hdmi_codec_i2s_dai_ops,
};

static const struct snd_soc_dai_driver hdmi_spdif_dai = {
        .name = "spdif-hifi",
        .id = DAI_ID_SPDIF,
        .playback = {
                .stream_name = "SPDIF Playback",
                .channels_min = 2,
                .channels_max = 2,
                .rates = HDMI_RATES,
                .formats = SPDIF_FORMATS,
        },
        .capture = {
                .stream_name = "Capture",
                .channels_min = 2,
                .channels_max = 2,
                .rates = HDMI_RATES,
                .formats = SPDIF_FORMATS,
        },
        .ops = &hdmi_codec_spdif_dai_ops,
};

static int hdmi_of_xlate_dai_id(struct snd_soc_component *component,
                                 struct device_node *endpoint)
{
        struct hdmi_codec_priv *hcp = snd_soc_component_get_drvdata(component);
        int ret = -ENOTSUPP; /* see snd_soc_get_dai_id() */

        if (hcp->hcd.ops->get_dai_id)
                ret = hcp->hcd.ops->get_dai_id(component, endpoint, hcp->hcd.data);

        return ret;
}

static int hdmi_probe(struct snd_soc_component *component)
{
        struct hdmi_codec_priv *hcp = snd_soc_component_get_drvdata(component);
        int ret = 0;

        if (hcp->hcd.ops->hook_plugged_cb) {
                ret = hcp->hcd.ops->hook_plugged_cb(component->dev->parent,
                                                    hcp->hcd.data,
                                                    plugged_cb,
                                                    component->dev);
        }

        return ret;
}

static void hdmi_remove(struct snd_soc_component *component)
{
        struct hdmi_codec_priv *hcp = snd_soc_component_get_drvdata(component);

        if (hcp->hcd.ops->hook_plugged_cb)
                hcp->hcd.ops->hook_plugged_cb(component->dev->parent,
                                              hcp->hcd.data, NULL, NULL);
}

static const struct snd_soc_component_driver hdmi_driver = {
        .probe                  = hdmi_probe,
        .remove                 = hdmi_remove,
        .dapm_widgets           = hdmi_widgets,
        .num_dapm_widgets       = ARRAY_SIZE(hdmi_widgets),
        .of_xlate_dai_id        = hdmi_of_xlate_dai_id,
        .idle_bias_on           = 1,
        .use_pmdown_time        = 1,
        .endianness             = 1,
        .set_jack               = hdmi_codec_set_jack,
};

static int hdmi_codec_probe(struct platform_device *pdev)
{
        struct hdmi_codec_pdata *hcd = pdev->dev.platform_data;
        struct snd_soc_dai_driver *daidrv;
        struct device *dev = &pdev->dev;
        struct hdmi_codec_priv *hcp;
        int dai_count, i = 0;
        int ret;

        if (!hcd) {
                dev_err(dev, "%s: No platform data\n", __func__);
                return -EINVAL;
        }

        dai_count = hcd->i2s + hcd->spdif;
        if (dai_count < 1 || !hcd->ops ||
            (!hcd->ops->hw_params && !hcd->ops->prepare) ||
            !hcd->ops->audio_shutdown) {
                dev_err(dev, "%s: Invalid parameters\n", __func__);
                return -EINVAL;
        }

        hcp = devm_kzalloc(dev, sizeof(*hcp), GFP_KERNEL);
        if (!hcp)
                return -ENOMEM;

        hcp->hcd = *hcd;
        mutex_init(&hcp->lock);

        ret = snd_pcm_create_iec958_consumer_default(hcp->iec_status,
                                                     sizeof(hcp->iec_status));
        if (ret < 0)
                return ret;

        daidrv = devm_kcalloc(dev, dai_count, sizeof(*daidrv), GFP_KERNEL);
        if (!daidrv)
                return -ENOMEM;

        if (hcd->i2s) {
                daidrv[i] = hdmi_i2s_dai;
                daidrv[i].playback.channels_max = hcd->max_i2s_channels;
                if (hcd->i2s_formats) {
                        daidrv[i].playback.formats = hcd->i2s_formats;
                        daidrv[i].capture.formats = hcd->i2s_formats;
                }
                if (hcd->no_i2s_playback)
                        memset(&daidrv[i].playback, 0,
                               sizeof(daidrv[i].playback));
                if (hcd->no_i2s_capture)
                        memset(&daidrv[i].capture, 0,
                               sizeof(daidrv[i].capture));
                i++;
        }

        if (hcd->spdif) {
                daidrv[i] = hdmi_spdif_dai;
                if (hcd->no_spdif_playback)
                        memset(&daidrv[i].playback, 0,
                               sizeof(daidrv[i].playback));
                if (hcd->no_spdif_capture)
                        memset(&daidrv[i].capture, 0,
                               sizeof(daidrv[i].capture));
        }

        dev_set_drvdata(dev, hcp);

        ret = devm_snd_soc_register_component(dev, &hdmi_driver, daidrv,
                                              dai_count);
        if (ret) {
                dev_err(dev, "%s: snd_soc_register_component() failed (%d)\n",
                        __func__, ret);
                return ret;
        }
        return 0;
}

static struct platform_driver hdmi_codec_driver = {
        .driver = {
                .name = HDMI_CODEC_DRV_NAME,
        },
        .probe = hdmi_codec_probe,
};

module_platform_driver(hdmi_codec_driver);

MODULE_AUTHOR("Jyri Sarha <jsarha@ti.com>");
MODULE_DESCRIPTION("HDMI Audio Codec Driver");
MODULE_LICENSE("GPL");
MODULE_ALIAS("platform:" HDMI_CODEC_DRV_NAME);