// SPDX-License-Identifier: GPL-2.0
/*
 * Copyright (C) 2018 Gateworks Corporation
 */
#include <linux/delay.h>
#include <linux/hdmi.h>
#include <linux/i2c.h>
#include <linux/init.h>
#include <linux/interrupt.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/of_graph.h>
#include <linux/platform_device.h>
#include <linux/regulator/consumer.h>
#include <linux/types.h>
#include <linux/v4l2-dv-timings.h>
#include <linux/videodev2.h>

#include <media/v4l2-ctrls.h>
#include <media/v4l2-device.h>
#include <media/v4l2-dv-timings.h>
#include <media/v4l2-event.h>
#include <media/v4l2-fwnode.h>
#include <media/i2c/tda1997x.h>

#include <sound/core.h>
#include <sound/pcm.h>
#include <sound/pcm_params.h>
#include <sound/soc.h>

#include <dt-bindings/media/tda1997x.h>

#include "tda1997x_regs.h"

#define TDA1997X_MBUS_CODES     5

/* debug level */
static int debug;
module_param(debug, int, 0644);
MODULE_PARM_DESC(debug, "debug level (0-2)");

/* Audio formats */
static const char * const audtype_names[] = {
        "PCM",                  /* PCM Samples */
        "HBR",                  /* High Bit Rate Audio */
        "OBA",                  /* One-Bit Audio */
        "DST"                   /* Direct Stream Transfer */
};

/* Audio output port formats */
enum audfmt_types {
        AUDFMT_TYPE_DISABLED = 0,
        AUDFMT_TYPE_I2S,
        AUDFMT_TYPE_SPDIF,
};
static const char * const audfmt_names[] = {
        "Disabled",
        "I2S",
        "SPDIF",
};

/* Video input formats */
static const char * const hdmi_colorspace_names[] = {
        "RGB", "YUV422", "YUV444", "YUV420", "", "", "", "",
};
static const char * const hdmi_colorimetry_names[] = {
        "", "ITU601", "ITU709", "Extended",
};
static const char * const v4l2_quantization_names[] = {
        "Default",
        "Full Range (0-255)",
        "Limited Range (16-235)",
};

/* Video output port formats */
static const char * const vidfmt_names[] = {
        "RGB444/YUV444",        /* RGB/YUV444 16bit data bus, 8bpp */
        "YUV422 semi-planar",   /* YUV422 16bit data base, 8bpp */
        "YUV422 CCIR656",       /* BT656 (YUV 8bpp 2 clock per pixel) */
        "Invalid",
};

/*
 * Colorspace conversion matrices
 */
struct color_matrix_coefs {
        const char *name;
        /* Input offsets */
        s16 offint1;
        s16 offint2;
        s16 offint3;
        /* Coeficients */
        s16 p11coef;
        s16 p12coef;
        s16 p13coef;
        s16 p21coef;
        s16 p22coef;
        s16 p23coef;
        s16 p31coef;
        s16 p32coef;
        s16 p33coef;
        /* Output offsets */
        s16 offout1;
        s16 offout2;
        s16 offout3;
};

enum {
        ITU709_RGBFULL,
        ITU601_RGBFULL,
        RGBLIMITED_RGBFULL,
        RGBLIMITED_ITU601,
        RGBLIMITED_ITU709,
        RGBFULL_ITU601,
        RGBFULL_ITU709,
};

/* NB: 4096 is 1.0 using fixed point numbers */
static const struct color_matrix_coefs conv_matrix[] = {
        {
                "YUV709 -> RGB full",
                 -256, -2048,  -2048,
                 4769, -2183,   -873,
                 4769,  7343,      0,
                 4769,     0,   8652,
                    0,     0,      0,
        },
        {
                "YUV601 -> RGB full",
                 -256, -2048,  -2048,
                 4769, -3330,  -1602,
                 4769,  6538,      0,
                 4769,     0,   8264,
                  256,   256,    256,
        },
        {
                "RGB limited -> RGB full",
                 -256,  -256,   -256,
                    0,  4769,      0,
                    0,     0,   4769,
                 4769,     0,      0,
                    0,     0,      0,
        },
        {
                "RGB limited -> ITU601",
                 -256,  -256,   -256,
                 2404,  1225,    467,
                -1754,  2095,   -341,
                -1388,  -707,   2095,
                  256,  2048,   2048,
        },
        {
                "RGB limited -> ITU709",
                 -256,  -256,   -256,
                 2918,   867,    295,
                -1894,  2087,   -190,
                -1607,  -477,   2087,
                  256,  2048,   2048,
        },
        {
                "RGB full -> ITU601",
                    0,     0,      0,
                 2065,  1052,    401,
                -1506,  1799,   -293,
                -1192,  -607,   1799,
                  256,  2048,   2048,
        },
        {
                "RGB full -> ITU709",
                    0,     0,      0,
                 2506,   745,    253,
                -1627,  1792,   -163,
                -1380,  -410,   1792,
                  256,  2048,   2048,
        },
};

static const struct v4l2_dv_timings_cap tda1997x_dv_timings_cap = {
        .type = V4L2_DV_BT_656_1120,
        /* keep this initialization for compatibility with GCC < 4.4.6 */
        .reserved = { 0 },

        V4L2_INIT_BT_TIMINGS(
                640, 1920,                      /* min/max width */
                350, 1200,                      /* min/max height */
                13000000, 165000000,            /* min/max pixelclock */
                /* standards */
                V4L2_DV_BT_STD_CEA861 | V4L2_DV_BT_STD_DMT |
                        V4L2_DV_BT_STD_GTF | V4L2_DV_BT_STD_CVT,
                /* capabilities */
                V4L2_DV_BT_CAP_INTERLACED | V4L2_DV_BT_CAP_PROGRESSIVE |
                        V4L2_DV_BT_CAP_REDUCED_BLANKING |
                        V4L2_DV_BT_CAP_CUSTOM
        )
};

/* regulator supplies */
static const char * const tda1997x_supply_name[] = {
        "DOVDD", /* Digital I/O supply */
        "DVDD",  /* Digital Core supply */
        "AVDD",  /* Analog supply */
};

#define TDA1997X_NUM_SUPPLIES ARRAY_SIZE(tda1997x_supply_name)

enum tda1997x_type {
        TDA19971,
        TDA19973,
};

enum tda1997x_hdmi_pads {
        TDA1997X_PAD_SOURCE,
        TDA1997X_NUM_PADS,
};

struct tda1997x_chip_info {
        enum tda1997x_type type;
        const char *name;
};

struct tda1997x_state {
        const struct tda1997x_chip_info *info;
        struct tda1997x_platform_data pdata;
        struct i2c_client *client;
        struct i2c_client *client_cec;
        struct v4l2_subdev sd;
        struct regulator_bulk_data supplies[TDA1997X_NUM_SUPPLIES];
        struct media_pad pads[TDA1997X_NUM_PADS];
        struct mutex lock;
        struct mutex page_lock;
        char page;

        /* detected info from chip */
        int chip_revision;
        char port_30bit;
        char output_2p5;
        char tmdsb_clk;
        char tmdsb_soc;

        /* status info */
        char hdmi_status;
        char mptrw_in_progress;
        char activity_status;
        char input_detect[2];

        /* video */
        struct hdmi_avi_infoframe avi_infoframe;
        struct v4l2_hdmi_colorimetry colorimetry;
        u32 rgb_quantization_range;
        struct v4l2_dv_timings timings;
        int fps;
        const struct color_matrix_coefs *conv;
        u32 mbus_codes[TDA1997X_MBUS_CODES];    /* available modes */
        u32 mbus_code;          /* current mode */
        u8 vid_fmt;

        /* controls */
        struct v4l2_ctrl_handler hdl;
        struct v4l2_ctrl *detect_tx_5v_ctrl;
        struct v4l2_ctrl *rgb_quantization_range_ctrl;

        /* audio */
        u8  audio_ch_alloc;
        int audio_samplerate;
        int audio_channels;
        int audio_samplesize;
        int audio_type;
        struct mutex audio_lock;
        struct snd_pcm_substream *audio_stream;

        /* EDID */
        struct {
                u8 edid[256];
                u32 present;
                unsigned int blocks;
        } edid;
        struct delayed_work delayed_work_enable_hpd;
};

static const struct v4l2_event tda1997x_ev_fmt = {
        .type = V4L2_EVENT_SOURCE_CHANGE,
        .u.src_change.changes = V4L2_EVENT_SRC_CH_RESOLUTION,
};

static const struct tda1997x_chip_info tda1997x_chip_info[] = {
        [TDA19971] = {
                .type = TDA19971,
                .name = "tda19971",
        },
        [TDA19973] = {
                .type = TDA19973,
                .name = "tda19973",
        },
};

static inline struct tda1997x_state *to_state(struct v4l2_subdev *sd)
{
        return container_of(sd, struct tda1997x_state, sd);
}

static inline struct v4l2_subdev *to_sd(struct v4l2_ctrl *ctrl)
{
        return &container_of(ctrl->handler, struct tda1997x_state, hdl)->sd;
}

static int tda1997x_cec_read(struct v4l2_subdev *sd, u8 reg)
{
        struct tda1997x_state *state = to_state(sd);
        int val;

        val = i2c_smbus_read_byte_data(state->client_cec, reg);
        if (val < 0) {
                v4l_err(state->client, "read reg error: reg=%2x\n", reg);
                val = -1;
        }

        return val;
}

static int tda1997x_cec_write(struct v4l2_subdev *sd, u8 reg, u8 val)
{
        struct tda1997x_state *state = to_state(sd);
        int ret = 0;

        ret = i2c_smbus_write_byte_data(state->client_cec, reg, val);
        if (ret < 0) {
                v4l_err(state->client, "write reg error:reg=%2x,val=%2x\n",
                        reg, val);
                ret = -1;
        }

        return ret;
}

/* -----------------------------------------------------------------------------
 * I2C transfer
 */

static int tda1997x_setpage(struct v4l2_subdev *sd, u8 page)
{
        struct tda1997x_state *state = to_state(sd);
        int ret;

        if (state->page != page) {
                ret = i2c_smbus_write_byte_data(state->client,
                        REG_CURPAGE_00H, page);
                if (ret < 0) {
                        v4l_err(state->client,
                                "write reg error:reg=%2x,val=%2x\n",
                                REG_CURPAGE_00H, page);
                        return ret;
                }
                state->page = page;
        }
        return 0;
}

static inline int io_read(struct v4l2_subdev *sd, u16 reg)
{
        struct tda1997x_state *state = to_state(sd);
        int val;

        mutex_lock(&state->page_lock);
        if (tda1997x_setpage(sd, reg >> 8)) {
                val = -1;
                goto out;
        }

        val = i2c_smbus_read_byte_data(state->client, reg&0xff);
        if (val < 0) {
                v4l_err(state->client, "read reg error: reg=%2x\n", reg & 0xff);
                val = -1;
                goto out;
        }

out:
        mutex_unlock(&state->page_lock);
        return val;
}

static inline long io_read16(struct v4l2_subdev *sd, u16 reg)
{
        int val;
        long lval = 0;

        val = io_read(sd, reg);
        if (val < 0)
                return val;
        lval |= (val << 8);
        val = io_read(sd, reg + 1);
        if (val < 0)
                return val;
        lval |= val;

        return lval;
}

static inline long io_read24(struct v4l2_subdev *sd, u16 reg)
{
        int val;
        long lval = 0;

        val = io_read(sd, reg);
        if (val < 0)
                return val;
        lval |= (val << 16);
        val = io_read(sd, reg + 1);
        if (val < 0)
                return val;
        lval |= (val << 8);
        val = io_read(sd, reg + 2);
        if (val < 0)
                return val;
        lval |= val;

        return lval;
}

static unsigned int io_readn(struct v4l2_subdev *sd, u16 reg, u8 len, u8 *data)
{
        int i;
        int sz = 0;
        int val;

        for (i = 0; i < len; i++) {
                val = io_read(sd, reg + i);
                if (val < 0)
                        break;
                data[i] = val;
                sz++;
        }

        return sz;
}

static int io_write(struct v4l2_subdev *sd, u16 reg, u8 val)
{
        struct tda1997x_state *state = to_state(sd);
        s32 ret = 0;

        mutex_lock(&state->page_lock);
        if (tda1997x_setpage(sd, reg >> 8)) {
                ret = -1;
                goto out;
        }

        ret = i2c_smbus_write_byte_data(state->client, reg & 0xff, val);
        if (ret < 0) {
                v4l_err(state->client, "write reg error:reg=%2x,val=%2x\n",
                        reg&0xff, val);
                ret = -1;
                goto out;
        }

out:
        mutex_unlock(&state->page_lock);
        return ret;
}

static int io_write16(struct v4l2_subdev *sd, u16 reg, u16 val)
{
        int ret;

        ret = io_write(sd, reg, (val >> 8) & 0xff);
        if (ret < 0)
                return ret;
        ret = io_write(sd, reg + 1, val & 0xff);
        if (ret < 0)
                return ret;
        return 0;
}

static int io_write24(struct v4l2_subdev *sd, u16 reg, u32 val)
{
        int ret;

        ret = io_write(sd, reg, (val >> 16) & 0xff);
        if (ret < 0)
                return ret;
        ret = io_write(sd, reg + 1, (val >> 8) & 0xff);
        if (ret < 0)
                return ret;
        ret = io_write(sd, reg + 2, val & 0xff);
        if (ret < 0)
                return ret;
        return 0;
}

/* -----------------------------------------------------------------------------
 * Hotplug
 */

enum hpd_mode {
        HPD_LOW_BP,     /* HPD low and pulse of at least 100ms */
        HPD_LOW_OTHER,  /* HPD low and pulse of at least 100ms */
        HPD_HIGH_BP,    /* HIGH */
        HPD_HIGH_OTHER,
        HPD_PULSE,      /* HPD low pulse */
};

/* manual HPD (Hot Plug Detect) control */
static int tda1997x_manual_hpd(struct v4l2_subdev *sd, enum hpd_mode mode)
{
        u8 hpd_auto, hpd_pwr, hpd_man;

        hpd_auto = io_read(sd, REG_HPD_AUTO_CTRL);
        hpd_pwr = io_read(sd, REG_HPD_POWER);
        hpd_man = io_read(sd, REG_HPD_MAN_CTRL);

        /* mask out unused bits */
        hpd_man &= (HPD_MAN_CTRL_HPD_PULSE |
                    HPD_MAN_CTRL_5VEN |
                    HPD_MAN_CTRL_HPD_B |
                    HPD_MAN_CTRL_HPD_A);

        switch (mode) {
        /* HPD low and pulse of at least 100ms */
        case HPD_LOW_BP:
                /* hpd_bp=0 */
                hpd_pwr &= ~HPD_POWER_BP_MASK;
                /* disable HPD_A and HPD_B */
                hpd_man &= ~(HPD_MAN_CTRL_HPD_A | HPD_MAN_CTRL_HPD_B);
                io_write(sd, REG_HPD_POWER, hpd_pwr);
                io_write(sd, REG_HPD_MAN_CTRL, hpd_man);
                break;
        /* HPD high */
        case HPD_HIGH_BP:
                /* hpd_bp=1 */
                hpd_pwr &= ~HPD_POWER_BP_MASK;
                hpd_pwr |= 1 << HPD_POWER_BP_SHIFT;
                io_write(sd, REG_HPD_POWER, hpd_pwr);
                break;
        /* HPD low and pulse of at least 100ms */
        case HPD_LOW_OTHER:
                /* disable HPD_A and HPD_B */
                hpd_man &= ~(HPD_MAN_CTRL_HPD_A | HPD_MAN_CTRL_HPD_B);
                /* hp_other=0 */
                hpd_auto &= ~HPD_AUTO_HP_OTHER;
                io_write(sd, REG_HPD_AUTO_CTRL, hpd_auto);
                io_write(sd, REG_HPD_MAN_CTRL, hpd_man);
                break;
        /* HPD high */
        case HPD_HIGH_OTHER:
                hpd_auto |= HPD_AUTO_HP_OTHER;
                io_write(sd, REG_HPD_AUTO_CTRL, hpd_auto);
                break;
        /* HPD low pulse */
        case HPD_PULSE:
                /* disable HPD_A and HPD_B */
                hpd_man &= ~(HPD_MAN_CTRL_HPD_A | HPD_MAN_CTRL_HPD_B);
                io_write(sd, REG_HPD_MAN_CTRL, hpd_man);
                break;
        }

        return 0;
}

static void tda1997x_delayed_work_enable_hpd(struct work_struct *work)
{
        struct delayed_work *dwork = to_delayed_work(work);
        struct tda1997x_state *state = container_of(dwork,
                                                    struct tda1997x_state,
                                                    delayed_work_enable_hpd);
        struct v4l2_subdev *sd = &state->sd;

        v4l2_dbg(2, debug, sd, "%s\n", __func__);

        /* Set HPD high */
        tda1997x_manual_hpd(sd, HPD_HIGH_OTHER);
        tda1997x_manual_hpd(sd, HPD_HIGH_BP);

        state->edid.present = 1;
}

static void tda1997x_disable_edid(struct v4l2_subdev *sd)
{
        struct tda1997x_state *state = to_state(sd);

        v4l2_dbg(1, debug, sd, "%s\n", __func__);
        cancel_delayed_work_sync(&state->delayed_work_enable_hpd);

        /* Set HPD low */
        tda1997x_manual_hpd(sd, HPD_LOW_BP);
}

static void tda1997x_enable_edid(struct v4l2_subdev *sd)
{
        struct tda1997x_state *state = to_state(sd);

        v4l2_dbg(1, debug, sd, "%s\n", __func__);

        /* Enable hotplug after 100ms */
        schedule_delayed_work(&state->delayed_work_enable_hpd, HZ / 10);
}

/* -----------------------------------------------------------------------------
 * Signal Control
 */

/*
 * configure vid_fmt based on mbus_code
 */
static int
tda1997x_setup_format(struct tda1997x_state *state, u32 code)
{
        v4l_dbg(1, debug, state->client, "%s code=0x%x\n", __func__, code);
        switch (code) {
        case MEDIA_BUS_FMT_RGB121212_1X36:
        case MEDIA_BUS_FMT_RGB888_1X24:
        case MEDIA_BUS_FMT_YUV12_1X36:
        case MEDIA_BUS_FMT_YUV8_1X24:
                state->vid_fmt = OF_FMT_444;
                break;
        case MEDIA_BUS_FMT_UYVY12_1X24:
        case MEDIA_BUS_FMT_UYVY10_1X20:
        case MEDIA_BUS_FMT_UYVY8_1X16:
                state->vid_fmt = OF_FMT_422_SMPT;
                break;
        case MEDIA_BUS_FMT_UYVY12_2X12:
        case MEDIA_BUS_FMT_UYVY10_2X10:
        case MEDIA_BUS_FMT_UYVY8_2X8:
                state->vid_fmt = OF_FMT_422_CCIR;
                break;
        default:
                v4l_err(state->client, "incompatible format (0x%x)\n", code);
                return -EINVAL;
        }
        v4l_dbg(1, debug, state->client, "%s code=0x%x fmt=%s\n", __func__,
                code, vidfmt_names[state->vid_fmt]);
        state->mbus_code = code;

        return 0;
}

/*
 * The color conversion matrix will convert between the colorimetry of the
 * HDMI input to the desired output format RGB|YUV. RGB output is to be
 * full-range and YUV is to be limited range.
 *
 * RGB full-range uses values from 0 to 255 which is recommended on a monitor
 * and RGB Limited uses values from 16 to 236 (16=black, 235=white) which is
 * typically recommended on a TV.
 */
static void
tda1997x_configure_csc(struct v4l2_subdev *sd)
{
        struct tda1997x_state *state = to_state(sd);
        struct hdmi_avi_infoframe *avi = &state->avi_infoframe;
        struct v4l2_hdmi_colorimetry *c = &state->colorimetry;
        /* Blanking code values depend on output colorspace (RGB or YUV) */
        struct blanking_codes {
                s16 code_gy;
                s16 code_bu;
                s16 code_rv;
        };
        static const struct blanking_codes rgb_blanking = { 64, 64, 64 };
        static const struct blanking_codes yuv_blanking = { 64, 512, 512 };
        const struct blanking_codes *blanking_codes = NULL;
        u8 reg;

        v4l_dbg(1, debug, state->client, "input:%s quant:%s output:%s\n",
                hdmi_colorspace_names[avi->colorspace],
                v4l2_quantization_names[c->quantization],
                vidfmt_names[state->vid_fmt]);
        state->conv = NULL;
        switch (state->vid_fmt) {
        /* RGB output */
        case OF_FMT_444:
                blanking_codes = &rgb_blanking;
                if (c->colorspace == V4L2_COLORSPACE_SRGB) {
                        if (c->quantization == V4L2_QUANTIZATION_LIM_RANGE)
                                state->conv = &conv_matrix[RGBLIMITED_RGBFULL];
                } else {
                        if (c->colorspace == V4L2_COLORSPACE_REC709)
                                state->conv = &conv_matrix[ITU709_RGBFULL];
                        else if (c->colorspace == V4L2_COLORSPACE_SMPTE170M)
                                state->conv = &conv_matrix[ITU601_RGBFULL];
                }
                break;

        /* YUV output */
        case OF_FMT_422_SMPT: /* semi-planar */
        case OF_FMT_422_CCIR: /* CCIR656 */
                blanking_codes = &yuv_blanking;
                if ((c->colorspace == V4L2_COLORSPACE_SRGB) &&
                    (c->quantization == V4L2_QUANTIZATION_FULL_RANGE)) {
                        if (state->timings.bt.height <= 576)
                                state->conv = &conv_matrix[RGBFULL_ITU601];
                        else
                                state->conv = &conv_matrix[RGBFULL_ITU709];
                } else if ((c->colorspace == V4L2_COLORSPACE_SRGB) &&
                           (c->quantization == V4L2_QUANTIZATION_LIM_RANGE)) {
                        if (state->timings.bt.height <= 576)
                                state->conv = &conv_matrix[RGBLIMITED_ITU601];
                        else
                                state->conv = &conv_matrix[RGBLIMITED_ITU709];
                }
                break;
        }

        if (state->conv) {
                v4l_dbg(1, debug, state->client, "%s\n",
                        state->conv->name);
                /* enable matrix conversion */
                reg = io_read(sd, REG_VDP_CTRL);
                reg &= ~VDP_CTRL_MATRIX_BP;
                io_write(sd, REG_VDP_CTRL, reg);
                /* offset inputs */
                io_write16(sd, REG_VDP_MATRIX + 0, state->conv->offint1);
                io_write16(sd, REG_VDP_MATRIX + 2, state->conv->offint2);
                io_write16(sd, REG_VDP_MATRIX + 4, state->conv->offint3);
                /* coefficients */
                io_write16(sd, REG_VDP_MATRIX + 6, state->conv->p11coef);
                io_write16(sd, REG_VDP_MATRIX + 8, state->conv->p12coef);
                io_write16(sd, REG_VDP_MATRIX + 10, state->conv->p13coef);
                io_write16(sd, REG_VDP_MATRIX + 12, state->conv->p21coef);
                io_write16(sd, REG_VDP_MATRIX + 14, state->conv->p22coef);
                io_write16(sd, REG_VDP_MATRIX + 16, state->conv->p23coef);
                io_write16(sd, REG_VDP_MATRIX + 18, state->conv->p31coef);
                io_write16(sd, REG_VDP_MATRIX + 20, state->conv->p32coef);
                io_write16(sd, REG_VDP_MATRIX + 22, state->conv->p33coef);
                /* offset outputs */
                io_write16(sd, REG_VDP_MATRIX + 24, state->conv->offout1);
                io_write16(sd, REG_VDP_MATRIX + 26, state->conv->offout2);
                io_write16(sd, REG_VDP_MATRIX + 28, state->conv->offout3);
        } else {
                /* disable matrix conversion */
                reg = io_read(sd, REG_VDP_CTRL);
                reg |= VDP_CTRL_MATRIX_BP;
                io_write(sd, REG_VDP_CTRL, reg);
        }

        /* SetBlankingCodes */
        if (blanking_codes) {
                io_write16(sd, REG_BLK_GY, blanking_codes->code_gy);
                io_write16(sd, REG_BLK_BU, blanking_codes->code_bu);
                io_write16(sd, REG_BLK_RV, blanking_codes->code_rv);
        }
}

/* Configure frame detection window and VHREF timing generator */
static void
tda1997x_configure_vhref(struct v4l2_subdev *sd)
{
        struct tda1997x_state *state = to_state(sd);
        const struct v4l2_bt_timings *bt = &state->timings.bt;
        int width, lines;
        u16 href_start, href_end;
        u16 vref_f1_start, vref_f2_start;
        u8 vref_f1_width, vref_f2_width;
        u8 field_polarity;
        u16 fieldref_f1_start, fieldref_f2_start;
        u8 reg;

        href_start = bt->hbackporch + bt->hsync + 1;
        href_end = href_start + bt->width;
        vref_f1_start = bt->height + bt->vbackporch + bt->vsync +
                        bt->il_vbackporch + bt->il_vsync +
                        bt->il_vfrontporch;
        vref_f1_width = bt->vbackporch + bt->vsync + bt->vfrontporch;
        vref_f2_start = 0;
        vref_f2_width = 0;
        fieldref_f1_start = 0;
        fieldref_f2_start = 0;
        if (bt->interlaced) {
                vref_f2_start = (bt->height / 2) +
                                (bt->il_vbackporch + bt->il_vsync - 1);
                vref_f2_width = bt->il_vbackporch + bt->il_vsync +
                                bt->il_vfrontporch;
                fieldref_f2_start = vref_f2_start + bt->il_vfrontporch +
                                    fieldref_f1_start;
        }
        field_polarity = 0;

        width = V4L2_DV_BT_FRAME_WIDTH(bt);
        lines = V4L2_DV_BT_FRAME_HEIGHT(bt);

        /*
         * Configure Frame Detection Window:
         *  horiz area where the VHREF module consider a VSYNC a new frame
         */
        io_write16(sd, REG_FDW_S, 0x2ef); /* start position */
        io_write16(sd, REG_FDW_E, 0x141); /* end position */

        /* Set Pixel And Line Counters */
        if (state->chip_revision == 0)
                io_write16(sd, REG_PXCNT_PR, 4);
        else
                io_write16(sd, REG_PXCNT_PR, 1);
        io_write16(sd, REG_PXCNT_NPIX, width & MASK_VHREF);
        io_write16(sd, REG_LCNT_PR, 1);
        io_write16(sd, REG_LCNT_NLIN, lines & MASK_VHREF);

        /*
         * Configure the VHRef timing generator responsible for rebuilding all
         * horiz and vert synch and ref signals from its input allowing auto
         * detection algorithms and forcing predefined modes (480i & 576i)
         */
        reg = VHREF_STD_DET_OFF << VHREF_STD_DET_SHIFT;
        io_write(sd, REG_VHREF_CTRL, reg);

        /*
         * Configure the VHRef timing values. In case the VHREF generator has
         * been configured in manual mode, this will allow to manually set all
         * horiz and vert ref values (non-active pixel areas) of the generator
         * and allows setting the frame reference params.
         */
        /* horizontal reference start/end */
        io_write16(sd, REG_HREF_S, href_start & MASK_VHREF);
        io_write16(sd, REG_HREF_E, href_end & MASK_VHREF);
        /* vertical reference f1 start/end */
        io_write16(sd, REG_VREF_F1_S, vref_f1_start & MASK_VHREF);
        io_write(sd, REG_VREF_F1_WIDTH, vref_f1_width);
        /* vertical reference f2 start/end */
        io_write16(sd, REG_VREF_F2_S, vref_f2_start & MASK_VHREF);
        io_write(sd, REG_VREF_F2_WIDTH, vref_f2_width);

        /* F1/F2 FREF, field polarity */
        reg = fieldref_f1_start & MASK_VHREF;
        reg |= field_polarity << 8;
        io_write16(sd, REG_FREF_F1_S, reg);
        reg = fieldref_f2_start & MASK_VHREF;
        io_write16(sd, REG_FREF_F2_S, reg);
}

/* Configure Video Output port signals */
static int
tda1997x_configure_vidout(struct tda1997x_state *state)
{
        struct v4l2_subdev *sd = &state->sd;
        struct tda1997x_platform_data *pdata = &state->pdata;
        u8 prefilter;
        u8 reg;

        /* Configure pixel clock generator: delay, polarity, rate */
        reg = (state->vid_fmt == OF_FMT_422_CCIR) ?
               PCLK_SEL_X2 : PCLK_SEL_X1;
        reg |= pdata->vidout_delay_pclk << PCLK_DELAY_SHIFT;
        reg |= pdata->vidout_inv_pclk << PCLK_INV_SHIFT;
        io_write(sd, REG_PCLK, reg);

        /* Configure pre-filter */
        prefilter = 0; /* filters off */
        /* YUV422 mode requires conversion */
        if ((state->vid_fmt == OF_FMT_422_SMPT) ||
            (state->vid_fmt == OF_FMT_422_CCIR)) {
                /* 2/7 taps for Rv and Bu */
                prefilter = FILTERS_CTRL_2_7TAP << FILTERS_CTRL_BU_SHIFT |
                            FILTERS_CTRL_2_7TAP << FILTERS_CTRL_RV_SHIFT;
        }
        io_write(sd, REG_FILTERS_CTRL, prefilter);

        /* Configure video port */
        reg = state->vid_fmt & OF_FMT_MASK;
        if (state->vid_fmt == OF_FMT_422_CCIR)
                reg |= (OF_BLK | OF_TRC);
        reg |= OF_VP_ENABLE;
        io_write(sd, REG_OF, reg);

        /* Configure formatter and conversions */
        reg = io_read(sd, REG_VDP_CTRL);
        /* pre-filter is needed unless (REG_FILTERS_CTRL == 0) */
        if (!prefilter)
                reg |= VDP_CTRL_PREFILTER_BP;
        else
                reg &= ~VDP_CTRL_PREFILTER_BP;
        /* formatter is needed for YUV422 and for trc/blc codes */
        if (state->vid_fmt == OF_FMT_444)
                reg |= VDP_CTRL_FORMATTER_BP;
        /* formatter and compdel needed for timing/blanking codes */
        else
                reg &= ~(VDP_CTRL_FORMATTER_BP | VDP_CTRL_COMPDEL_BP);
        /* activate compdel for small sync delays */
        if ((pdata->vidout_delay_vs < 4) || (pdata->vidout_delay_hs < 4))
                reg &= ~VDP_CTRL_COMPDEL_BP;
        io_write(sd, REG_VDP_CTRL, reg);

        /* Configure DE output signal: delay, polarity, and source */
        reg = pdata->vidout_delay_de << DE_FREF_DELAY_SHIFT |
              pdata->vidout_inv_de << DE_FREF_INV_SHIFT |
              pdata->vidout_sel_de << DE_FREF_SEL_SHIFT;
        io_write(sd, REG_DE_FREF, reg);

        /* Configure HS/HREF output signal: delay, polarity, and source */
        if (state->vid_fmt != OF_FMT_422_CCIR) {
                reg = pdata->vidout_delay_hs << HS_HREF_DELAY_SHIFT |
                      pdata->vidout_inv_hs << HS_HREF_INV_SHIFT |
                      pdata->vidout_sel_hs << HS_HREF_SEL_SHIFT;
        } else
                reg = HS_HREF_SEL_NONE << HS_HREF_SEL_SHIFT;
        io_write(sd, REG_HS_HREF, reg);

        /* Configure VS/VREF output signal: delay, polarity, and source */
        if (state->vid_fmt != OF_FMT_422_CCIR) {
                reg = pdata->vidout_delay_vs << VS_VREF_DELAY_SHIFT |
                      pdata->vidout_inv_vs << VS_VREF_INV_SHIFT |
                      pdata->vidout_sel_vs << VS_VREF_SEL_SHIFT;
        } else
                reg = VS_VREF_SEL_NONE << VS_VREF_SEL_SHIFT;
        io_write(sd, REG_VS_VREF, reg);

        return 0;
}

/* Configure Audio output port signals */
static int
tda1997x_configure_audout(struct v4l2_subdev *sd, u8 channel_assignment)
{
        struct tda1997x_state *state = to_state(sd);
        struct tda1997x_platform_data *pdata = &state->pdata;
        bool sp_used_by_fifo = true;
        u8 reg;

        if (!pdata->audout_format)
                return 0;

        /* channel assignment (CEA-861-D Table 20) */
        io_write(sd, REG_AUDIO_PATH, channel_assignment);

        /* Audio output configuration */
        reg = 0;
        switch (pdata->audout_format) {
        case AUDFMT_TYPE_I2S:
                reg |= AUDCFG_BUS_I2S << AUDCFG_BUS_SHIFT;
                break;
        case AUDFMT_TYPE_SPDIF:
                reg |= AUDCFG_BUS_SPDIF << AUDCFG_BUS_SHIFT;
                break;
        }
        switch (state->audio_type) {
        case AUDCFG_TYPE_PCM:
                reg |= AUDCFG_TYPE_PCM << AUDCFG_TYPE_SHIFT;
                break;
        case AUDCFG_TYPE_OBA:
                reg |= AUDCFG_TYPE_OBA << AUDCFG_TYPE_SHIFT;
                break;
        case AUDCFG_TYPE_DST:
                reg |= AUDCFG_TYPE_DST << AUDCFG_TYPE_SHIFT;
                sp_used_by_fifo = false;
                break;
        case AUDCFG_TYPE_HBR:
                reg |= AUDCFG_TYPE_HBR << AUDCFG_TYPE_SHIFT;
                if (pdata->audout_layout == 1) {
                        /* demuxed via AP0:AP3 */
                        reg |= AUDCFG_HBR_DEMUX << AUDCFG_HBR_SHIFT;
                        if (pdata->audout_format == AUDFMT_TYPE_SPDIF)
                                sp_used_by_fifo = false;
                } else {
                        /* straight via AP0 */
                        reg |= AUDCFG_HBR_STRAIGHT << AUDCFG_HBR_SHIFT;
                }
                break;
        }
        if (pdata->audout_width == 32)
                reg |= AUDCFG_I2SW_32 << AUDCFG_I2SW_SHIFT;
        else
                reg |= AUDCFG_I2SW_16 << AUDCFG_I2SW_SHIFT;

        /* automatic hardware mute */
        if (pdata->audio_auto_mute)
                reg |= AUDCFG_AUTO_MUTE_EN;
        /* clock polarity */
        if (pdata->audout_invert_clk)
                reg |= AUDCFG_CLK_INVERT;
        io_write(sd, REG_AUDCFG, reg);

        /* audio layout */
        reg = (pdata->audout_layout) ? AUDIO_LAYOUT_LAYOUT1 : 0;
        if (!pdata->audout_layoutauto)
                reg |= AUDIO_LAYOUT_MANUAL;
        if (sp_used_by_fifo)
                reg |= AUDIO_LAYOUT_SP_FLAG;
        io_write(sd, REG_AUDIO_LAYOUT, reg);

        /* FIFO Latency value */
        io_write(sd, REG_FIFO_LATENCY_VAL, 0x80);

        /* Audio output port config */
        if (sp_used_by_fifo) {
                reg = AUDIO_OUT_ENABLE_AP0;
                if (channel_assignment >= 0x01)
                        reg |= AUDIO_OUT_ENABLE_AP1;
                if (channel_assignment >= 0x04)
                        reg |= AUDIO_OUT_ENABLE_AP2;
                if (channel_assignment >= 0x0c)
                        reg |= AUDIO_OUT_ENABLE_AP3;
                /* specific cases where AP1 is not used */
                if ((channel_assignment == 0x04)
                 || (channel_assignment == 0x08)
                 || (channel_assignment == 0x0c)
                 || (channel_assignment == 0x10)
                 || (channel_assignment == 0x14)
                 || (channel_assignment == 0x18)
                 || (channel_assignment == 0x1c))
                        reg &= ~AUDIO_OUT_ENABLE_AP1;
                /* specific cases where AP2 is not used */
                if ((channel_assignment >= 0x14)
                 && (channel_assignment <= 0x17))
                        reg &= ~AUDIO_OUT_ENABLE_AP2;
        } else {

                reg = AUDIO_OUT_ENABLE_AP3 |
                      AUDIO_OUT_ENABLE_AP2 |
                      AUDIO_OUT_ENABLE_AP1 |
                      AUDIO_OUT_ENABLE_AP0;
        }
        if (pdata->audout_format == AUDFMT_TYPE_I2S)
                reg |= (AUDIO_OUT_ENABLE_ACLK | AUDIO_OUT_ENABLE_WS);
        io_write(sd, REG_AUDIO_OUT_ENABLE, reg);

        /* reset test mode to normal audio freq auto selection */
        io_write(sd, REG_TEST_MODE, 0x00);

        return 0;
}

/* Soft Reset of specific hdmi info */
static int
tda1997x_hdmi_info_reset(struct v4l2_subdev *sd, u8 info_rst, bool reset_sus)
{
        u8 reg;

        /* reset infoframe engine packets */
        reg = io_read(sd, REG_HDMI_INFO_RST);
        io_write(sd, REG_HDMI_INFO_RST, info_rst);

        /* if infoframe engine has been reset clear INT_FLG_MODE */
        if (reg & RESET_IF) {
                reg = io_read(sd, REG_INT_FLG_CLR_MODE);
                io_write(sd, REG_INT_FLG_CLR_MODE, reg);
        }

        /* Disable REFTIM to restart start-up-sequencer (SUS) */
        reg = io_read(sd, REG_RATE_CTRL);
        reg &= ~RATE_REFTIM_ENABLE;
        if (!reset_sus)
                reg |= RATE_REFTIM_ENABLE;
        reg = io_write(sd, REG_RATE_CTRL, reg);

        return 0;
}

static void
tda1997x_power_mode(struct tda1997x_state *state, bool enable)
{
        struct v4l2_subdev *sd = &state->sd;
        u8 reg;

        if (enable) {
                /* Automatic control of TMDS */
                io_write(sd, REG_PON_OVR_EN, PON_DIS);
                /* Enable current bias unit */
                io_write(sd, REG_CFG1, PON_EN);
                /* Enable deep color PLL */
                io_write(sd, REG_DEEP_PLL7_BYP, PON_DIS);
                /* Output buffers active */
                reg = io_read(sd, REG_OF);
                reg &= ~OF_VP_ENABLE;
                io_write(sd, REG_OF, reg);
        } else {
                /* Power down EDID mode sequence */
                /* Output buffers in HiZ */
                reg = io_read(sd, REG_OF);
                reg |= OF_VP_ENABLE;
                io_write(sd, REG_OF, reg);
                /* Disable deep color PLL */
                io_write(sd, REG_DEEP_PLL7_BYP, PON_EN);
                /* Disable current bias unit */
                io_write(sd, REG_CFG1, PON_DIS);
                /* Manual control of TMDS */
                io_write(sd, REG_PON_OVR_EN, PON_EN);
        }
}

static bool
tda1997x_detect_tx_5v(struct v4l2_subdev *sd)
{
        u8 reg = io_read(sd, REG_DETECT_5V);

        return ((reg & DETECT_5V_SEL) ? 1 : 0);
}

static bool
tda1997x_detect_tx_hpd(struct v4l2_subdev *sd)
{
        u8 reg = io_read(sd, REG_DETECT_5V);

        return ((reg & DETECT_HPD) ? 1 : 0);
}

static int
tda1997x_detect_std(struct tda1997x_state *state,
                    struct v4l2_dv_timings *timings)
{
        struct v4l2_subdev *sd = &state->sd;

        /*
         * Read the FMT registers
         *   REG_V_PER: Period of a frame (or field) in MCLK (27MHz) cycles
         *   REG_H_PER: Period of a line in MCLK (27MHz) cycles
         *   REG_HS_WIDTH: Period of horiz sync pulse in MCLK (27MHz) cycles
         */
        u32 vper, vsync_pos;
        u16 hper, hsync_pos, hsper, interlaced;
        u16 htot, hact, hfront, hsync, hback;
        u16 vtot, vact, vfront1, vfront2, vsync, vback1, vback2;

        if (!state->input_detect[0] && !state->input_detect[1])
                return -ENOLINK;

        vper = io_read24(sd, REG_V_PER);
        hper = io_read16(sd, REG_H_PER);
        hsper = io_read16(sd, REG_HS_WIDTH);
        vsync_pos = vper & MASK_VPER_SYNC_POS;
        hsync_pos = hper & MASK_HPER_SYNC_POS;
        interlaced = hsper & MASK_HSWIDTH_INTERLACED;
        vper &= MASK_VPER;
        hper &= MASK_HPER;
        hsper &= MASK_HSWIDTH;
        v4l2_dbg(1, debug, sd, "Signal Timings: %u/%u/%u\n", vper, hper, hsper);

        htot = io_read16(sd, REG_FMT_H_TOT);
        hact = io_read16(sd, REG_FMT_H_ACT);
        hfront = io_read16(sd, REG_FMT_H_FRONT);
        hsync = io_read16(sd, REG_FMT_H_SYNC);
        hback = io_read16(sd, REG_FMT_H_BACK);

        vtot = io_read16(sd, REG_FMT_V_TOT);
        vact = io_read16(sd, REG_FMT_V_ACT);
        vfront1 = io_read(sd, REG_FMT_V_FRONT_F1);
        vfront2 = io_read(sd, REG_FMT_V_FRONT_F2);
        vsync = io_read(sd, REG_FMT_V_SYNC);
        vback1 = io_read(sd, REG_FMT_V_BACK_F1);
        vback2 = io_read(sd, REG_FMT_V_BACK_F2);

        v4l2_dbg(1, debug, sd, "Geometry: H %u %u %u %u %u Sync%c  V %u %u %u %u %u %u %u Sync%c\n",
                 htot, hact, hfront, hsync, hback, hsync_pos ? '+' : '-',
                 vtot, vact, vfront1, vfront2, vsync, vback1, vback2, vsync_pos ? '+' : '-');

        if (!timings)
                return 0;

        timings->type = V4L2_DV_BT_656_1120;
        timings->bt.width = hact;
        timings->bt.hfrontporch = hfront;
        timings->bt.hsync = hsync;
        timings->bt.hbackporch = hback;
        timings->bt.height = vact;
        timings->bt.vfrontporch = vfront1;
        timings->bt.vsync = vsync;
        timings->bt.vbackporch = vback1;
        timings->bt.interlaced = interlaced ? V4L2_DV_INTERLACED : V4L2_DV_PROGRESSIVE;
        timings->bt.polarities = vsync_pos ? V4L2_DV_VSYNC_POS_POL : 0;
        timings->bt.polarities |= hsync_pos ? V4L2_DV_HSYNC_POS_POL : 0;

        timings->bt.pixelclock = (u64)htot * vtot * 27000000;
        if (interlaced) {
                timings->bt.il_vfrontporch = vfront2;
                timings->bt.il_vsync = timings->bt.vsync;
                timings->bt.il_vbackporch = vback2;
                do_div(timings->bt.pixelclock, vper * 2 /* full frame */);
        } else {
                timings->bt.il_vfrontporch = 0;
                timings->bt.il_vsync = 0;
                timings->bt.il_vbackporch = 0;
                do_div(timings->bt.pixelclock, vper);
        }
        v4l2_find_dv_timings_cap(timings, &tda1997x_dv_timings_cap,
                                 (u32)timings->bt.pixelclock / 500, NULL, NULL);
        v4l2_print_dv_timings(sd->name, "Detected format: ", timings, false);
        return 0;
}

/* some sort of errata workaround for chip revision 0 (N1) */
static void tda1997x_reset_n1(struct tda1997x_state *state)
{
        struct v4l2_subdev *sd = &state->sd;
        u8 reg;

        /* clear HDMI mode flag in BCAPS */
        io_write(sd, REG_CLK_CFG, CLK_CFG_SEL_ACLK_EN | CLK_CFG_SEL_ACLK);
        io_write(sd, REG_PON_OVR_EN, PON_EN);
        io_write(sd, REG_PON_CBIAS, PON_EN);
        io_write(sd, REG_PON_PLL, PON_EN);

        reg = io_read(sd, REG_MODE_REC_CFG1);
        reg &= ~0x06;
        reg |= 0x02;
        io_write(sd, REG_MODE_REC_CFG1, reg);
        io_write(sd, REG_CLK_CFG, CLK_CFG_DIS);
        io_write(sd, REG_PON_OVR_EN, PON_DIS);
        reg = io_read(sd, REG_MODE_REC_CFG1);
        reg &= ~0x06;
        io_write(sd, REG_MODE_REC_CFG1, reg);
}

/*
 * Activity detection must only be notified when stable_clk_x AND active_x
 * bits are set to 1. If only stable_clk_x bit is set to 1 but not
 * active_x, it means that the TMDS clock is not in the defined range
 * and activity detection must not be notified.
 */
static u8
tda1997x_read_activity_status_regs(struct v4l2_subdev *sd)
{
        u8 reg, status = 0;

        /* Read CLK_A_STATUS register */
        reg = io_read(sd, REG_CLK_A_STATUS);
        /* ignore if not active */
        if ((reg & MASK_CLK_STABLE) && !(reg & MASK_CLK_ACTIVE))
                reg &= ~MASK_CLK_STABLE;
        status |= ((reg & MASK_CLK_STABLE) >> 2);

        /* Read CLK_B_STATUS register */
        reg = io_read(sd, REG_CLK_B_STATUS);
        /* ignore if not active */
        if ((reg & MASK_CLK_STABLE) && !(reg & MASK_CLK_ACTIVE))
                reg &= ~MASK_CLK_STABLE;
        status |= ((reg & MASK_CLK_STABLE) >> 1);

        /* Read the SUS_STATUS register */
        reg = io_read(sd, REG_SUS_STATUS);

        /* If state = 5 => TMDS is locked */
        if ((reg & MASK_SUS_STATUS) == LAST_STATE_REACHED)
                status |= MASK_SUS_STATE;
        else
                status &= ~MASK_SUS_STATE;

        return status;
}

static void
set_rgb_quantization_range(struct tda1997x_state *state)
{
        struct v4l2_hdmi_colorimetry *c = &state->colorimetry;

        state->colorimetry = v4l2_hdmi_rx_colorimetry(&state->avi_infoframe,
                                                      NULL,
                                                      state->timings.bt.height);
        /* If ycbcr_enc is V4L2_YCBCR_ENC_DEFAULT, we receive RGB */
        if (c->ycbcr_enc == V4L2_YCBCR_ENC_DEFAULT) {
                switch (state->rgb_quantization_range) {
                case V4L2_DV_RGB_RANGE_LIMITED:
                        c->quantization = V4L2_QUANTIZATION_FULL_RANGE;
                        break;
                case V4L2_DV_RGB_RANGE_FULL:
                        c->quantization = V4L2_QUANTIZATION_LIM_RANGE;
                        break;
                }
        }
        v4l_dbg(1, debug, state->client,
                "colorspace=%d/%d colorimetry=%d range=%s content=%d\n",
                state->avi_infoframe.colorspace, c->colorspace,
                state->avi_infoframe.colorimetry,
                v4l2_quantization_names[c->quantization],
                state->avi_infoframe.content_type);
}

/* parse an infoframe and do some sanity checks on it */
static unsigned int
tda1997x_parse_infoframe(struct tda1997x_state *state, u16 addr)
{
        struct v4l2_subdev *sd = &state->sd;
        union hdmi_infoframe frame;
        u8 buffer[40] = { 0 };
        u8 reg;
        int len, err;

        /* read data */
        len = io_readn(sd, addr, sizeof(buffer), buffer);
        err = hdmi_infoframe_unpack(&frame, buffer, len);
        if (err) {
                v4l_err(state->client,
                        "failed parsing %d byte infoframe: 0x%04x/0x%02x\n",
                        len, addr, buffer[0]);
                return err;
        }
        hdmi_infoframe_log(KERN_INFO, &state->client->dev, &frame);
        switch (frame.any.type) {
        /* Audio InfoFrame: see HDMI spec 8.2.2 */
        case HDMI_INFOFRAME_TYPE_AUDIO:
                /* sample rate */
                switch (frame.audio.sample_frequency) {
                case HDMI_AUDIO_SAMPLE_FREQUENCY_32000:
                        state->audio_samplerate = 32000;
                        break;
                case HDMI_AUDIO_SAMPLE_FREQUENCY_44100:
                        state->audio_samplerate = 44100;
                        break;
                case HDMI_AUDIO_SAMPLE_FREQUENCY_48000:
                        state->audio_samplerate = 48000;
                        break;
                case HDMI_AUDIO_SAMPLE_FREQUENCY_88200:
                        state->audio_samplerate = 88200;
                        break;
                case HDMI_AUDIO_SAMPLE_FREQUENCY_96000:
                        state->audio_samplerate = 96000;
                        break;
                case HDMI_AUDIO_SAMPLE_FREQUENCY_176400:
                        state->audio_samplerate = 176400;
                        break;
                case HDMI_AUDIO_SAMPLE_FREQUENCY_192000:
                        state->audio_samplerate = 192000;
                        break;
                default:
                case HDMI_AUDIO_SAMPLE_FREQUENCY_STREAM:
                        break;
                }

                /* sample size */
                switch (frame.audio.sample_size) {
                case HDMI_AUDIO_SAMPLE_SIZE_16:
                        state->audio_samplesize = 16;
                        break;
                case HDMI_AUDIO_SAMPLE_SIZE_20:
                        state->audio_samplesize = 20;
                        break;
                case HDMI_AUDIO_SAMPLE_SIZE_24:
                        state->audio_samplesize = 24;
                        break;
                case HDMI_AUDIO_SAMPLE_SIZE_STREAM:
                default:
                        break;
                }

                /* Channel Count */
                state->audio_channels = frame.audio.channels;
                if (frame.audio.channel_allocation &&
                    frame.audio.channel_allocation != state->audio_ch_alloc) {
                        /* use the channel assignment from the infoframe */
                        state->audio_ch_alloc = frame.audio.channel_allocation;
                        tda1997x_configure_audout(sd, state->audio_ch_alloc);
                        /* reset the audio FIFO */
                        tda1997x_hdmi_info_reset(sd, RESET_AUDIO, false);
                }
                break;

        /* Auxiliary Video information (AVI) InfoFrame: see HDMI spec 8.2.1 */
        case HDMI_INFOFRAME_TYPE_AVI:
                state->avi_infoframe = frame.avi;
                set_rgb_quantization_range(state);

                /* configure upsampler: 0=bypass 1=repeatchroma 2=interpolate */
                reg = io_read(sd, REG_PIX_REPEAT);
                reg &= ~PIX_REPEAT_MASK_UP_SEL;
                if (frame.avi.colorspace == HDMI_COLORSPACE_YUV422)
                        reg |= (PIX_REPEAT_CHROMA << PIX_REPEAT_SHIFT);
                io_write(sd, REG_PIX_REPEAT, reg);

                /* ConfigurePixelRepeater: repeat n-times each pixel */
                reg = io_read(sd, REG_PIX_REPEAT);
                reg &= ~PIX_REPEAT_MASK_REP;
                reg |= frame.avi.pixel_repeat;
                io_write(sd, REG_PIX_REPEAT, reg);

                /* configure the receiver with the new colorspace */
                tda1997x_configure_csc(sd);
                break;
        default:
                break;
        }
        return 0;
}

static void tda1997x_irq_sus(struct tda1997x_state *state, u8 *flags)
{
        struct v4l2_subdev *sd = &state->sd;
        u8 reg, source;

        source = io_read(sd, REG_INT_FLG_CLR_SUS);
        io_write(sd, REG_INT_FLG_CLR_SUS, source);

        if (source & MASK_MPT) {
                /* reset MTP in use flag if set */
                if (state->mptrw_in_progress)
                        state->mptrw_in_progress = 0;
        }

        if (source & MASK_SUS_END) {
                /* reset audio FIFO */
                reg = io_read(sd, REG_HDMI_INFO_RST);
                reg |= MASK_SR_FIFO_FIFO_CTRL;
                io_write(sd, REG_HDMI_INFO_RST, reg);
                reg &= ~MASK_SR_FIFO_FIFO_CTRL;
                io_write(sd, REG_HDMI_INFO_RST, reg);

                /* reset HDMI flags */
                state->hdmi_status = 0;
        }

        /* filter FMT interrupt based on SUS state */
        reg = io_read(sd, REG_SUS_STATUS);
        if (((reg & MASK_SUS_STATUS) != LAST_STATE_REACHED)
           || (source & MASK_MPT)) {
                source &= ~MASK_FMT;
        }

        if (source & (MASK_FMT | MASK_SUS_END)) {
                reg = io_read(sd, REG_SUS_STATUS);
                if ((reg & MASK_SUS_STATUS) != LAST_STATE_REACHED) {
                        v4l_err(state->client, "BAD SUS STATUS\n");
                        return;
                }
                if (debug)
                        tda1997x_detect_std(state, NULL);
                /* notify user of change in resolution */
                v4l2_subdev_notify_event(&state->sd, &tda1997x_ev_fmt);
        }
}

static void tda1997x_irq_ddc(struct tda1997x_state *state, u8 *flags)
{
        struct v4l2_subdev *sd = &state->sd;
        u8 source;

        source = io_read(sd, REG_INT_FLG_CLR_DDC);
        io_write(sd, REG_INT_FLG_CLR_DDC, source);
        if (source & MASK_EDID_MTP) {
                /* reset MTP in use flag if set */
                if (state->mptrw_in_progress)
                        state->mptrw_in_progress = 0;
        }

        /* Detection of +5V */
        if (source & MASK_DET_5V) {
                v4l2_ctrl_s_ctrl(state->detect_tx_5v_ctrl,
                                 tda1997x_detect_tx_5v(sd));
        }
}

static void tda1997x_irq_rate(struct tda1997x_state *state, u8 *flags)
{
        struct v4l2_subdev *sd = &state->sd;
        u8 reg, source;

        u8 irq_status;

        source = io_read(sd, REG_INT_FLG_CLR_RATE);
        io_write(sd, REG_INT_FLG_CLR_RATE, source);

        /* read status regs */
        irq_status = tda1997x_read_activity_status_regs(sd);

        /*
         * read clock status reg until INT_FLG_CLR_RATE is still 0
         * after the read to make sure its the last one
         */
        reg = source;
        while (reg != 0) {
                irq_status = tda1997x_read_activity_status_regs(sd);
                reg = io_read(sd, REG_INT_FLG_CLR_RATE);
                io_write(sd, REG_INT_FLG_CLR_RATE, reg);
                source |= reg;
        }

        /* we only pay attention to stability change events */
        if (source & (MASK_RATE_A_ST | MASK_RATE_B_ST)) {
                int input = (source & MASK_RATE_A_ST)?0:1;
                u8 mask = 1<<input;

                /* state change */
                if ((irq_status & mask) != (state->activity_status & mask)) {
                        /* activity lost */
                        if ((irq_status & mask) == 0) {
                                v4l_info(state->client,
                                         "HDMI-%c: Digital Activity Lost\n",
                                         input+'A');

                                /* bypass up/down sampler and pixel repeater */
                                reg = io_read(sd, REG_PIX_REPEAT);
                                reg &= ~PIX_REPEAT_MASK_UP_SEL;
                                reg &= ~PIX_REPEAT_MASK_REP;
                                io_write(sd, REG_PIX_REPEAT, reg);

                                if (state->chip_revision == 0)
                                        tda1997x_reset_n1(state);

                                state->input_detect[input] = 0;
                                v4l2_subdev_notify_event(sd, &tda1997x_ev_fmt);
                        }

                        /* activity detected */
                        else {
                                v4l_info(state->client,
                                         "HDMI-%c: Digital Activity Detected\n",
                                         input+'A');
                                state->input_detect[input] = 1;
                        }

                        /* hold onto current state */
                        state->activity_status = (irq_status & mask);
                }
        }
}

static void tda1997x_irq_info(struct tda1997x_state *state, u8 *flags)
{
        struct v4l2_subdev *sd = &state->sd;
        u8 source;

        source = io_read(sd, REG_INT_FLG_CLR_INFO);
        io_write(sd, REG_INT_FLG_CLR_INFO, source);

        /* Audio infoframe */
        if (source & MASK_AUD_IF) {
                tda1997x_parse_infoframe(state, AUD_IF);
                source &= ~MASK_AUD_IF;
        }

        /* Source Product Descriptor infoframe change */
        if (source & MASK_SPD_IF) {
                tda1997x_parse_infoframe(state, SPD_IF);
                source &= ~MASK_SPD_IF;
        }

        /* Auxiliary Video Information infoframe */
        if (source & MASK_AVI_IF) {
                tda1997x_parse_infoframe(state, AVI_IF);
                source &= ~MASK_AVI_IF;
        }
}

static void tda1997x_irq_audio(struct tda1997x_state *state, u8 *flags)
{
        struct v4l2_subdev *sd = &state->sd;
        u8 reg, source;

        source = io_read(sd, REG_INT_FLG_CLR_AUDIO);
        io_write(sd, REG_INT_FLG_CLR_AUDIO, source);

        /* reset audio FIFO on FIFO pointer error or audio mute */
        if (source & MASK_ERROR_FIFO_PT ||
            source & MASK_MUTE_FLG) {
                /* audio reset audio FIFO */
                reg = io_read(sd, REG_SUS_STATUS);
                if ((reg & MASK_SUS_STATUS) == LAST_STATE_REACHED) {
                        reg = io_read(sd, REG_HDMI_INFO_RST);
                        reg |= MASK_SR_FIFO_FIFO_CTRL;
                        io_write(sd, REG_HDMI_INFO_RST, reg);
                        reg &= ~MASK_SR_FIFO_FIFO_CTRL;
                        io_write(sd, REG_HDMI_INFO_RST, reg);
                        /* reset channel status IT if present */
                        source &= ~(MASK_CH_STATE);
                }
        }
        if (source & MASK_AUDIO_FREQ_FLG) {
                static const int freq[] = {
                        0, 32000, 44100, 48000, 88200, 96000, 176400, 192000
                };

                reg = io_read(sd, REG_AUDIO_FREQ);
                state->audio_samplerate = freq[reg & 7];
                v4l_info(state->client, "Audio Frequency Change: %dHz\n",
                         state->audio_samplerate);
        }
        if (source & MASK_AUDIO_FLG) {
                reg = io_read(sd, REG_AUDIO_FLAGS);
                if (reg & BIT(AUDCFG_TYPE_DST))
                        state->audio_type = AUDCFG_TYPE_DST;
                if (reg & BIT(AUDCFG_TYPE_OBA))
                        state->audio_type = AUDCFG_TYPE_OBA;
                if (reg & BIT(AUDCFG_TYPE_HBR))
                        state->audio_type = AUDCFG_TYPE_HBR;
                if (reg & BIT(AUDCFG_TYPE_PCM))
                        state->audio_type = AUDCFG_TYPE_PCM;
                v4l_info(state->client, "Audio Type: %s\n",
                         audtype_names[state->audio_type]);
        }
}

static void tda1997x_irq_hdcp(struct tda1997x_state *state, u8 *flags)
{
        struct v4l2_subdev *sd = &state->sd;
        u8 reg, source;

        source = io_read(sd, REG_INT_FLG_CLR_HDCP);
        io_write(sd, REG_INT_FLG_CLR_HDCP, source);

        /* reset MTP in use flag if set */
        if (source & MASK_HDCP_MTP)
                state->mptrw_in_progress = 0;
        if (source & MASK_STATE_C5) {
                /* REPEATER: mask AUDIO and IF irqs to avoid IF during auth */
                reg = io_read(sd, REG_INT_MASK_TOP);
                reg &= ~(INTERRUPT_AUDIO | INTERRUPT_INFO);
                io_write(sd, REG_INT_MASK_TOP, reg);
                *flags &= (INTERRUPT_AUDIO | INTERRUPT_INFO);
        }
}

static irqreturn_t tda1997x_isr_thread(int irq, void *d)
{
        struct tda1997x_state *state = d;
        struct v4l2_subdev *sd = &state->sd;
        u8 flags;

        mutex_lock(&state->lock);
        do {
                /* read interrupt flags */
                flags = io_read(sd, REG_INT_FLG_CLR_TOP);
                if (flags == 0)
                        break;

                /* SUS interrupt source (Input activity events) */
                if (flags & INTERRUPT_SUS)
                        tda1997x_irq_sus(state, &flags);
                /* DDC interrupt source (Display Data Channel) */
                else if (flags & INTERRUPT_DDC)
                        tda1997x_irq_ddc(state, &flags);
                /* RATE interrupt source (Digital Input activity) */
                else if (flags & INTERRUPT_RATE)
                        tda1997x_irq_rate(state, &flags);
                /* Infoframe change interrupt */
                else if (flags & INTERRUPT_INFO)
                        tda1997x_irq_info(state, &flags);
                /* Audio interrupt source:
                 *   freq change, DST,OBA,HBR,ASP flags, mute, FIFO err
                 */
                else if (flags & INTERRUPT_AUDIO)
                        tda1997x_irq_audio(state, &flags);
                /* HDCP interrupt source (content protection) */
                if (flags & INTERRUPT_HDCP)
                        tda1997x_irq_hdcp(state, &flags);
        } while (flags != 0);
        mutex_unlock(&state->lock);

        return IRQ_HANDLED;
}

/* -----------------------------------------------------------------------------
 * v4l2_subdev_video_ops
 */

static int
tda1997x_g_input_status(struct v4l2_subdev *sd, u32 *status)
{
        struct tda1997x_state *state = to_state(sd);
        u32 vper;
        u16 hper;
        u16 hsper;

        mutex_lock(&state->lock);
        vper = io_read24(sd, REG_V_PER) & MASK_VPER;
        hper = io_read16(sd, REG_H_PER) & MASK_HPER;
        hsper = io_read16(sd, REG_HS_WIDTH) & MASK_HSWIDTH;
        /*
         * The tda1997x supports A/B inputs but only a single output.
         * The irq handler monitors for timing changes on both inputs and
         * sets the input_detect array to 0|1 depending on signal presence.
         * I believe selection of A vs B is automatic.
         *
         * The vper/hper/hsper registers provide the frame period, line period
         * and horiz sync period (units of MCLK clock cycles (27MHz)) and
         * testing shows these values to be random if no signal is present
         * or locked.
         */
        v4l2_dbg(1, debug, sd, "inputs:%d/%d timings:%d/%d/%d\n",
                 state->input_detect[0], state->input_detect[1],
                 vper, hper, hsper);
        if (!state->input_detect[0] && !state->input_detect[1])
                *status = V4L2_IN_ST_NO_SIGNAL;
        else if (!vper || !hper || !hsper)
                *status = V4L2_IN_ST_NO_SYNC;
        else
                *status = 0;
        mutex_unlock(&state->lock);

        return 0;
};

static int tda1997x_s_dv_timings(struct v4l2_subdev *sd,
                                struct v4l2_dv_timings *timings)
{
        struct tda1997x_state *state = to_state(sd);

        v4l_dbg(1, debug, state->client, "%s\n", __func__);

        if (v4l2_match_dv_timings(&state->timings, timings, 0, false))
                return 0; /* no changes */

        if (!v4l2_valid_dv_timings(timings, &tda1997x_dv_timings_cap,
                                   NULL, NULL))
                return -ERANGE;

        mutex_lock(&state->lock);
        state->timings = *timings;
        /* setup frame detection window and VHREF timing generator */
        tda1997x_configure_vhref(sd);
        /* configure colorspace conversion */
        tda1997x_configure_csc(sd);
        mutex_unlock(&state->lock);

        return 0;
}

static int tda1997x_g_dv_timings(struct v4l2_subdev *sd,
                                 struct v4l2_dv_timings *timings)
{
        struct tda1997x_state *state = to_state(sd);

        v4l_dbg(1, debug, state->client, "%s\n", __func__);
        mutex_lock(&state->lock);
        *timings = state->timings;
        mutex_unlock(&state->lock);

        return 0;
}

static int tda1997x_query_dv_timings(struct v4l2_subdev *sd,
                                     struct v4l2_dv_timings *timings)
{
        struct tda1997x_state *state = to_state(sd);
        int ret;

        v4l_dbg(1, debug, state->client, "%s\n", __func__);
        memset(timings, 0, sizeof(struct v4l2_dv_timings));
        mutex_lock(&state->lock);
        ret = tda1997x_detect_std(state, timings);
        mutex_unlock(&state->lock);

        return ret;
}

static const struct v4l2_subdev_video_ops tda1997x_video_ops = {
        .g_input_status = tda1997x_g_input_status,
        .s_dv_timings = tda1997x_s_dv_timings,
        .g_dv_timings = tda1997x_g_dv_timings,
        .query_dv_timings = tda1997x_query_dv_timings,
};


/* -----------------------------------------------------------------------------
 * v4l2_subdev_pad_ops
 */

static int tda1997x_init_cfg(struct v4l2_subdev *sd,
                             struct v4l2_subdev_state *sd_state)
{
        struct tda1997x_state *state = to_state(sd);
        struct v4l2_mbus_framefmt *mf;

        mf = v4l2_subdev_get_try_format(sd, sd_state, 0);
        mf->code = state->mbus_codes[0];

        return 0;
}

static int tda1997x_enum_mbus_code(struct v4l2_subdev *sd,
                                  struct v4l2_subdev_state *sd_state,
                                  struct v4l2_subdev_mbus_code_enum *code)
{
        struct tda1997x_state *state = to_state(sd);

        v4l_dbg(1, debug, state->client, "%s %d\n", __func__, code->index);
        if (code->index >= ARRAY_SIZE(state->mbus_codes))
                return -EINVAL;

        if (!state->mbus_codes[code->index])
                return -EINVAL;

        code->code = state->mbus_codes[code->index];

        return 0;
}

static void tda1997x_fill_format(struct tda1997x_state *state,
                                 struct v4l2_mbus_framefmt *format)
{
        const struct v4l2_bt_timings *bt;

        memset(format, 0, sizeof(*format));
        bt = &state->timings.bt;
        format->width = bt->width;
        format->height = bt->height;
        format->colorspace = state->colorimetry.colorspace;
        format->field = (bt->interlaced) ?
                V4L2_FIELD_SEQ_TB : V4L2_FIELD_NONE;
}

static int tda1997x_get_format(struct v4l2_subdev *sd,
                               struct v4l2_subdev_state *sd_state,
                               struct v4l2_subdev_format *format)
{
        struct tda1997x_state *state = to_state(sd);

        v4l_dbg(1, debug, state->client, "%s pad=%d which=%d\n",
                __func__, format->pad, format->which);

        tda1997x_fill_format(state, &format->format);

        if (format->which == V4L2_SUBDEV_FORMAT_TRY) {
                struct v4l2_mbus_framefmt *fmt;

                fmt = v4l2_subdev_get_try_format(sd, sd_state, format->pad);
                format->format.code = fmt->code;
        } else
                format->format.code = state->mbus_code;

        return 0;
}

static int tda1997x_set_format(struct v4l2_subdev *sd,
                               struct v4l2_subdev_state *sd_state,
                               struct v4l2_subdev_format *format)
{
        struct tda1997x_state *state = to_state(sd);
        u32 code = 0;
        int i;

        v4l_dbg(1, debug, state->client, "%s pad=%d which=%d fmt=0x%x\n",
                __func__, format->pad, format->which, format->format.code);

        for (i = 0; i < ARRAY_SIZE(state->mbus_codes); i++) {
                if (format->format.code == state->mbus_codes[i]) {
                        code = state->mbus_codes[i];
                        break;
                }
        }
        if (!code)
                code = state->mbus_codes[0];

        tda1997x_fill_format(state, &format->format);
        format->format.code = code;

        if (format->which == V4L2_SUBDEV_FORMAT_TRY) {
                struct v4l2_mbus_framefmt *fmt;

                fmt = v4l2_subdev_get_try_format(sd, sd_state, format->pad);
                *fmt = format->format;
        } else {
                int ret = tda1997x_setup_format(state, format->format.code);

                if (ret)
                        return ret;
                /* mbus_code has changed - re-configure csc/vidout */
                tda1997x_configure_csc(sd);
                tda1997x_configure_vidout(state);
        }

        return 0;
}

static int tda1997x_get_edid(struct v4l2_subdev *sd, struct v4l2_edid *edid)
{
        struct tda1997x_state *state = to_state(sd);

        v4l_dbg(1, debug, state->client, "%s pad=%d\n", __func__, edid->pad);
        memset(edid->reserved, 0, sizeof(edid->reserved));

        if (edid->start_block == 0 && edid->blocks == 0) {
                edid->blocks = state->edid.blocks;
                return 0;
        }

        if (!state->edid.present)
                return -ENODATA;

        if (edid->start_block >= state->edid.blocks)
                return -EINVAL;

        if (edid->start_block + edid->blocks > state->edid.blocks)
                edid->blocks = state->edid.blocks - edid->start_block;

        memcpy(edid->edid, state->edid.edid + edid->start_block * 128,
               edid->blocks * 128);

        return 0;
}

static int tda1997x_set_edid(struct v4l2_subdev *sd, struct v4l2_edid *edid)
{
        struct tda1997x_state *state = to_state(sd);
        int i;

        v4l_dbg(1, debug, state->client, "%s pad=%d\n", __func__, edid->pad);
        memset(edid->reserved, 0, sizeof(edid->reserved));

        if (edid->start_block != 0)
                return -EINVAL;

        if (edid->blocks == 0) {
                state->edid.blocks = 0;
                state->edid.present = 0;
                tda1997x_disable_edid(sd);
                return 0;
        }

        if (edid->blocks > 2) {
                edid->blocks = 2;
                return -E2BIG;
        }

        tda1997x_disable_edid(sd);

        /* write base EDID */
        for (i = 0; i < 128; i++)
                io_write(sd, REG_EDID_IN_BYTE0 + i, edid->edid[i]);

        /* write CEA Extension */
        for (i = 0; i < 128; i++)
                io_write(sd, REG_EDID_IN_BYTE128 + i, edid->edid[i+128]);

        /* store state */
        memcpy(state->edid.edid, edid->edid, 256);
        state->edid.blocks = edid->blocks;

        tda1997x_enable_edid(sd);

        return 0;
}

static int tda1997x_get_dv_timings_cap(struct v4l2_subdev *sd,
                                       struct v4l2_dv_timings_cap *cap)
{
        *cap = tda1997x_dv_timings_cap;
        return 0;
}

static int tda1997x_enum_dv_timings(struct v4l2_subdev *sd,
                                    struct v4l2_enum_dv_timings *timings)
{
        return v4l2_enum_dv_timings_cap(timings, &tda1997x_dv_timings_cap,
                                        NULL, NULL);
}

static const struct v4l2_subdev_pad_ops tda1997x_pad_ops = {
        .init_cfg = tda1997x_init_cfg,
        .enum_mbus_code = tda1997x_enum_mbus_code,
        .get_fmt = tda1997x_get_format,
        .set_fmt = tda1997x_set_format,
        .get_edid = tda1997x_get_edid,
        .set_edid = tda1997x_set_edid,
        .dv_timings_cap = tda1997x_get_dv_timings_cap,
        .enum_dv_timings = tda1997x_enum_dv_timings,
};

/* -----------------------------------------------------------------------------
 * v4l2_subdev_core_ops
 */

static int tda1997x_log_infoframe(struct v4l2_subdev *sd, int addr)
{
        struct tda1997x_state *state = to_state(sd);
        union hdmi_infoframe frame;
        u8 buffer[40] = { 0 };
        int len, err;

        /* read data */
        len = io_readn(sd, addr, sizeof(buffer), buffer);
        v4l2_dbg(1, debug, sd, "infoframe: addr=%d len=%d\n", addr, len);
        err = hdmi_infoframe_unpack(&frame, buffer, len);
        if (err) {
                v4l_err(state->client,
                        "failed parsing %d byte infoframe: 0x%04x/0x%02x\n",
                        len, addr, buffer[0]);
                return err;
        }
        hdmi_infoframe_log(KERN_INFO, &state->client->dev, &frame);

        return 0;
}

static int tda1997x_log_status(struct v4l2_subdev *sd)
{
        struct tda1997x_state *state = to_state(sd);
        struct v4l2_dv_timings timings;
        struct hdmi_avi_infoframe *avi = &state->avi_infoframe;

        v4l2_info(sd, "-----Chip status-----\n");
        v4l2_info(sd, "Chip: %s N%d\n", state->info->name,
                  state->chip_revision + 1);
        v4l2_info(sd, "EDID Enabled: %s\n", state->edid.present ? "yes" : "no");

        v4l2_info(sd, "-----Signal status-----\n");
        v4l2_info(sd, "Cable detected (+5V power): %s\n",
                  tda1997x_detect_tx_5v(sd) ? "yes" : "no");
        v4l2_info(sd, "HPD detected: %s\n",
                  tda1997x_detect_tx_hpd(sd) ? "yes" : "no");

        v4l2_info(sd, "-----Video Timings-----\n");
        switch (tda1997x_detect_std(state, &timings)) {
        case -ENOLINK:
                v4l2_info(sd, "No video detected\n");
                break;
        case -ERANGE:
                v4l2_info(sd, "Invalid signal detected\n");
                break;
        }
        v4l2_print_dv_timings(sd->name, "Configured format: ",
                              &state->timings, true);

        v4l2_info(sd, "-----Color space-----\n");
        v4l2_info(sd, "Input color space: %s %s %s",
                  hdmi_colorspace_names[avi->colorspace],
                  (avi->colorspace == HDMI_COLORSPACE_RGB) ? "" :
                        hdmi_colorimetry_names[avi->colorimetry],
                  v4l2_quantization_names[state->colorimetry.quantization]);
        v4l2_info(sd, "Output color space: %s",
                  vidfmt_names[state->vid_fmt]);

        v4l2_info(sd, "Color space conversion: %s", state->conv ?
                  state->conv->name : "None");

        v4l2_info(sd, "-----Audio-----\n");
        if (state->audio_channels) {
                v4l2_info(sd, "audio: %dch %dHz\n", state->audio_channels,
                          state->audio_samplerate);
        } else {
                v4l2_info(sd, "audio: none\n");
        }

        v4l2_info(sd, "-----Infoframes-----\n");
        tda1997x_log_infoframe(sd, AUD_IF);
        tda1997x_log_infoframe(sd, SPD_IF);
        tda1997x_log_infoframe(sd, AVI_IF);

        return 0;
}

static int tda1997x_subscribe_event(struct v4l2_subdev *sd,
                                    struct v4l2_fh *fh,
                                    struct v4l2_event_subscription *sub)
{
        switch (sub->type) {
        case V4L2_EVENT_SOURCE_CHANGE:
                return v4l2_src_change_event_subdev_subscribe(sd, fh, sub);
        case V4L2_EVENT_CTRL:
                return v4l2_ctrl_subdev_subscribe_event(sd, fh, sub);
        default:
                return -EINVAL;
        }
}

static const struct v4l2_subdev_core_ops tda1997x_core_ops = {
        .log_status = tda1997x_log_status,
        .subscribe_event = tda1997x_subscribe_event,
        .unsubscribe_event = v4l2_event_subdev_unsubscribe,
};

/* -----------------------------------------------------------------------------
 * v4l2_subdev_ops
 */

static const struct v4l2_subdev_ops tda1997x_subdev_ops = {
        .core = &tda1997x_core_ops,
        .video = &tda1997x_video_ops,
        .pad = &tda1997x_pad_ops,
};

/* -----------------------------------------------------------------------------
 * v4l2_controls
 */

static int tda1997x_s_ctrl(struct v4l2_ctrl *ctrl)
{
        struct v4l2_subdev *sd = to_sd(ctrl);
        struct tda1997x_state *state = to_state(sd);

        switch (ctrl->id) {
        /* allow overriding the default RGB quantization range */
        case V4L2_CID_DV_RX_RGB_RANGE:
                state->rgb_quantization_range = ctrl->val;
                set_rgb_quantization_range(state);
                tda1997x_configure_csc(sd);
                return 0;
        }

        return -EINVAL;
};

static int tda1997x_g_volatile_ctrl(struct v4l2_ctrl *ctrl)
{
        struct v4l2_subdev *sd = to_sd(ctrl);
        struct tda1997x_state *state = to_state(sd);

        if (ctrl->id == V4L2_CID_DV_RX_IT_CONTENT_TYPE) {
                ctrl->val = state->avi_infoframe.content_type;
                return 0;
        }
        return -EINVAL;
};

static const struct v4l2_ctrl_ops tda1997x_ctrl_ops = {
        .s_ctrl = tda1997x_s_ctrl,
        .g_volatile_ctrl = tda1997x_g_volatile_ctrl,
};

static int tda1997x_core_init(struct v4l2_subdev *sd)
{
        struct tda1997x_state *state = to_state(sd);
        struct tda1997x_platform_data *pdata = &state->pdata;
        u8 reg;
        int i;

        /* disable HPD */
        io_write(sd, REG_HPD_AUTO_CTRL, HPD_AUTO_HPD_UNSEL);
        if (state->chip_revision == 0) {
                io_write(sd, REG_MAN_SUS_HDMI_SEL, MAN_DIS_HDCP | MAN_RST_HDCP);
                io_write(sd, REG_CGU_DBG_SEL, 1 << CGU_DBG_CLK_SEL_SHIFT);
        }

        /* reset infoframe at end of start-up-sequencer */
        io_write(sd, REG_SUS_SET_RGB2, 0x06);
        io_write(sd, REG_SUS_SET_RGB3, 0x06);

        /* Enable TMDS pull-ups */
        io_write(sd, REG_RT_MAN_CTRL, RT_MAN_CTRL_RT |
                 RT_MAN_CTRL_RT_B | RT_MAN_CTRL_RT_A);

        /* enable sync measurement timing */
        tda1997x_cec_write(sd, REG_PWR_CONTROL & 0xff, 0x04);
        /* adjust CEC clock divider */
        tda1997x_cec_write(sd, REG_OSC_DIVIDER & 0xff, 0x03);
        tda1997x_cec_write(sd, REG_EN_OSC_PERIOD_LSB & 0xff, 0xa0);
        io_write(sd, REG_TIMER_D, 0x54);
        /* enable power switch */
        reg = tda1997x_cec_read(sd, REG_CONTROL & 0xff);
        reg |= 0x20;
        tda1997x_cec_write(sd, REG_CONTROL & 0xff, reg);
        mdelay(50);

        /* read the chip version */
        reg = io_read(sd, REG_VERSION);
        /* get the chip configuration */
        reg = io_read(sd, REG_CMTP_REG10);

        /* enable interrupts we care about */
        io_write(sd, REG_INT_MASK_TOP,
                 INTERRUPT_HDCP | INTERRUPT_AUDIO | INTERRUPT_INFO |
                 INTERRUPT_RATE | INTERRUPT_SUS);
        /* config_mtp,fmt,sus_end,sus_st */
        io_write(sd, REG_INT_MASK_SUS, MASK_MPT | MASK_FMT | MASK_SUS_END);
        /* rate stability change for inputs A/B */
        io_write(sd, REG_INT_MASK_RATE, MASK_RATE_B_ST | MASK_RATE_A_ST);
        /* aud,spd,avi*/
        io_write(sd, REG_INT_MASK_INFO,
                 MASK_AUD_IF | MASK_SPD_IF | MASK_AVI_IF);
        /* audio_freq,audio_flg,mute_flg,fifo_err */
        io_write(sd, REG_INT_MASK_AUDIO,
                 MASK_AUDIO_FREQ_FLG | MASK_AUDIO_FLG | MASK_MUTE_FLG |
                 MASK_ERROR_FIFO_PT);
        /* HDCP C5 state reached */
        io_write(sd, REG_INT_MASK_HDCP, MASK_STATE_C5);
        /* 5V detect and HDP pulse end */
        io_write(sd, REG_INT_MASK_DDC, MASK_DET_5V);
        /* don't care about AFE/MODE */
        io_write(sd, REG_INT_MASK_AFE, 0);
        io_write(sd, REG_INT_MASK_MODE, 0);

        /* clear all interrupts */
        io_write(sd, REG_INT_FLG_CLR_TOP, 0xff);
        io_write(sd, REG_INT_FLG_CLR_SUS, 0xff);
        io_write(sd, REG_INT_FLG_CLR_DDC, 0xff);
        io_write(sd, REG_INT_FLG_CLR_RATE, 0xff);
        io_write(sd, REG_INT_FLG_CLR_MODE, 0xff);
        io_write(sd, REG_INT_FLG_CLR_INFO, 0xff);
        io_write(sd, REG_INT_FLG_CLR_AUDIO, 0xff);
        io_write(sd, REG_INT_FLG_CLR_HDCP, 0xff);
        io_write(sd, REG_INT_FLG_CLR_AFE, 0xff);

        /* init TMDS equalizer */
        if (state->chip_revision == 0)
                io_write(sd, REG_CGU_DBG_SEL, 1 << CGU_DBG_CLK_SEL_SHIFT);
        io_write24(sd, REG_CLK_MIN_RATE, CLK_MIN_RATE);
        io_write24(sd, REG_CLK_MAX_RATE, CLK_MAX_RATE);
        if (state->chip_revision == 0)
                io_write(sd, REG_WDL_CFG, WDL_CFG_VAL);
        /* DC filter */
        io_write(sd, REG_DEEP_COLOR_CTRL, DC_FILTER_VAL);
        /* disable test pattern */
        io_write(sd, REG_SVC_MODE, 0x00);
        /* update HDMI INFO CTRL */
        io_write(sd, REG_INFO_CTRL, 0xff);
        /* write HDMI INFO EXCEED value */
        io_write(sd, REG_INFO_EXCEED, 3);

        if (state->chip_revision == 0)
                tda1997x_reset_n1(state);

        /*
         * No HDCP acknowledge when HDCP is disabled
         * and reset SUS to force format detection
         */
        tda1997x_hdmi_info_reset(sd, NACK_HDCP, true);

        /* Set HPD low */
        tda1997x_manual_hpd(sd, HPD_LOW_BP);

        /* Configure receiver capabilities */
        io_write(sd, REG_HDCP_BCAPS, HDCP_HDMI | HDCP_FAST_REAUTH);

        /* Configure HDMI: Auto HDCP mode, packet controlled mute */
        reg = HDMI_CTRL_MUTE_AUTO << HDMI_CTRL_MUTE_SHIFT;
        reg |= HDMI_CTRL_HDCP_AUTO << HDMI_CTRL_HDCP_SHIFT;
        io_write(sd, REG_HDMI_CTRL, reg);

        /* reset start-up-sequencer to force format detection */
        tda1997x_hdmi_info_reset(sd, 0, true);

        /* disable matrix conversion */
        reg = io_read(sd, REG_VDP_CTRL);
        reg |= VDP_CTRL_MATRIX_BP;
        io_write(sd, REG_VDP_CTRL, reg);

        /* set video output mode */
        tda1997x_configure_vidout(state);

        /* configure video output port */
        for (i = 0; i < 9; i++) {
                v4l_dbg(1, debug, state->client, "vidout_cfg[%d]=0x%02x\n", i,
                        pdata->vidout_port_cfg[i]);
                io_write(sd, REG_VP35_32_CTRL + i, pdata->vidout_port_cfg[i]);
        }

        /* configure audio output port */
        tda1997x_configure_audout(sd, 0);

        /* configure audio clock freq */
        switch (pdata->audout_mclk_fs) {
        case 512:
                reg = AUDIO_CLOCK_SEL_512FS;
                break;
        case 256:
                reg = AUDIO_CLOCK_SEL_256FS;
                break;
        case 128:
                reg = AUDIO_CLOCK_SEL_128FS;
                break;
        case 64:
                reg = AUDIO_CLOCK_SEL_64FS;
                break;
        case 32:
                reg = AUDIO_CLOCK_SEL_32FS;
                break;
        default:
                reg = AUDIO_CLOCK_SEL_16FS;
                break;
        }
        io_write(sd, REG_AUDIO_CLOCK, reg);

        /* reset advanced infoframes (ISRC1/ISRC2/ACP) */
        tda1997x_hdmi_info_reset(sd, RESET_AI, false);
        /* reset infoframe */
        tda1997x_hdmi_info_reset(sd, RESET_IF, false);
        /* reset audio infoframes */
        tda1997x_hdmi_info_reset(sd, RESET_AUDIO, false);
        /* reset gamut */
        tda1997x_hdmi_info_reset(sd, RESET_GAMUT, false);

        /* get initial HDMI status */
        state->hdmi_status = io_read(sd, REG_HDMI_FLAGS);

        io_write(sd, REG_EDID_ENABLE, EDID_ENABLE_A_EN | EDID_ENABLE_B_EN);
        return 0;
}

static int tda1997x_set_power(struct tda1997x_state *state, bool on)
{
        int ret = 0;

        if (on) {
                ret = regulator_bulk_enable(TDA1997X_NUM_SUPPLIES,
                                             state->supplies);
                msleep(300);
        } else {
                ret = regulator_bulk_disable(TDA1997X_NUM_SUPPLIES,
                                             state->supplies);
        }

        return ret;
}

static const struct i2c_device_id tda1997x_i2c_id[] = {
        {"tda19971", (kernel_ulong_t)&tda1997x_chip_info[TDA19971]},
        {"tda19973", (kernel_ulong_t)&tda1997x_chip_info[TDA19973]},
        { },
};
MODULE_DEVICE_TABLE(i2c, tda1997x_i2c_id);

static const struct of_device_id tda1997x_of_id[] __maybe_unused = {
        { .compatible = "nxp,tda19971", .data = &tda1997x_chip_info[TDA19971] },
        { .compatible = "nxp,tda19973", .data = &tda1997x_chip_info[TDA19973] },
        { },
};
MODULE_DEVICE_TABLE(of, tda1997x_of_id);

static int tda1997x_parse_dt(struct tda1997x_state *state)
{
        struct tda1997x_platform_data *pdata = &state->pdata;
        struct v4l2_fwnode_endpoint bus_cfg = { .bus_type = 0 };
        struct device_node *ep;
        struct device_node *np;
        unsigned int flags;
        const char *str;
        int ret;
        u32 v;

        /*
         * setup default values:
         * - HREF: active high from start to end of row
         * - VS: Vertical Sync active high at beginning of frame
         * - DE: Active high when data valid
         * - A_CLK: 128*Fs
         */
        pdata->vidout_sel_hs = HS_HREF_SEL_HREF_VHREF;
        pdata->vidout_sel_vs = VS_VREF_SEL_VREF_HDMI;
        pdata->vidout_sel_de = DE_FREF_SEL_DE_VHREF;

        np = state->client->dev.of_node;
        ep = of_graph_get_next_endpoint(np, NULL);
        if (!ep)
                return -EINVAL;

        ret = v4l2_fwnode_endpoint_parse(of_fwnode_handle(ep), &bus_cfg);
        if (ret) {
                of_node_put(ep);
                return ret;
        }
        of_node_put(ep);
        pdata->vidout_bus_type = bus_cfg.bus_type;

        /* polarity of HS/VS/DE */
        flags = bus_cfg.bus.parallel.flags;
        if (flags & V4L2_MBUS_HSYNC_ACTIVE_LOW)
                pdata->vidout_inv_hs = 1;
        if (flags & V4L2_MBUS_VSYNC_ACTIVE_LOW)
                pdata->vidout_inv_vs = 1;
        if (flags & V4L2_MBUS_DATA_ACTIVE_LOW)
                pdata->vidout_inv_de = 1;
        pdata->vidout_bus_width = bus_cfg.bus.parallel.bus_width;

        /* video output port config */
        ret = of_property_count_u32_elems(np, "nxp,vidout-portcfg");
        if (ret > 0) {
                u32 reg, val, i;

                for (i = 0; i < ret / 2 && i < 9; i++) {
                        of_property_read_u32_index(np, "nxp,vidout-portcfg",
                                                   i * 2, &reg);
                        of_property_read_u32_index(np, "nxp,vidout-portcfg",
                                                   i * 2 + 1, &val);
                        if (reg < 9)
                                pdata->vidout_port_cfg[reg] = val;
                }
        } else {
                v4l_err(state->client, "nxp,vidout-portcfg missing\n");
                return -EINVAL;
        }

        /* default to channel layout dictated by packet header */
        pdata->audout_layoutauto = true;

        pdata->audout_format = AUDFMT_TYPE_DISABLED;
        if (!of_property_read_string(np, "nxp,audout-format", &str)) {
                if (strcmp(str, "i2s") == 0)
                        pdata->audout_format = AUDFMT_TYPE_I2S;
                else if (strcmp(str, "spdif") == 0)
                        pdata->audout_format = AUDFMT_TYPE_SPDIF;
                else {
                        v4l_err(state->client, "nxp,audout-format invalid\n");
                        return -EINVAL;
                }
                if (!of_property_read_u32(np, "nxp,audout-layout", &v)) {
                        switch (v) {
                        case 0:
                        case 1:
                                break;
                        default:
                                v4l_err(state->client,
                                        "nxp,audout-layout invalid\n");
                                return -EINVAL;
                        }
                        pdata->audout_layout = v;
                }
                if (!of_property_read_u32(np, "nxp,audout-width", &v)) {
                        switch (v) {
                        case 16:
                        case 32:
                                break;
                        default:
                                v4l_err(state->client,
                                        "nxp,audout-width invalid\n");
                                return -EINVAL;
                        }
                        pdata->audout_width = v;
                }
                if (!of_property_read_u32(np, "nxp,audout-mclk-fs", &v)) {
                        switch (v) {
                        case 512:
                        case 256:
                        case 128:
                        case 64:
                        case 32:
                        case 16:
                                break;
                        default:
                                v4l_err(state->client,
                                        "nxp,audout-mclk-fs invalid\n");
                                return -EINVAL;
                        }
                        pdata->audout_mclk_fs = v;
                }
        }

        return 0;
}

static int tda1997x_get_regulators(struct tda1997x_state *state)
{
        int i;

        for (i = 0; i < TDA1997X_NUM_SUPPLIES; i++)
                state->supplies[i].supply = tda1997x_supply_name[i];

        return devm_regulator_bulk_get(&state->client->dev,
                                       TDA1997X_NUM_SUPPLIES,
                                       state->supplies);
}

static int tda1997x_identify_module(struct tda1997x_state *state)
{
        struct v4l2_subdev *sd = &state->sd;
        enum tda1997x_type type;
        u8 reg;

        /* Read chip configuration*/
        reg = io_read(sd, REG_CMTP_REG10);
        state->tmdsb_clk = (reg >> 6) & 0x01; /* use tmds clock B_inv for B */
        state->tmdsb_soc = (reg >> 5) & 0x01; /* tmds of input B */
        state->port_30bit = (reg >> 2) & 0x03; /* 30bit vs 24bit */
        state->output_2p5 = (reg >> 1) & 0x01; /* output supply 2.5v */
        switch ((reg >> 4) & 0x03) {
        case 0x00:
                type = TDA19971;
                break;
        case 0x02:
        case 0x03:
                type = TDA19973;
                break;
        default:
                dev_err(&state->client->dev, "unsupported chip ID\n");
                return -EIO;
        }
        if (state->info->type != type) {
                dev_err(&state->client->dev, "chip id mismatch\n");
                return -EIO;
        }

        /* read chip revision */
        state->chip_revision = io_read(sd, REG_CMTP_REG11);

        return 0;
}

static const struct media_entity_operations tda1997x_media_ops = {
        .link_validate = v4l2_subdev_link_validate,
};


/* -----------------------------------------------------------------------------
 * HDMI Audio Codec
 */

/* refine sample-rate based on HDMI source */
static int tda1997x_pcm_startup(struct snd_pcm_substream *substream,
                                struct snd_soc_dai *dai)
{
        struct v4l2_subdev *sd = snd_soc_dai_get_drvdata(dai);
        struct tda1997x_state *state = to_state(sd);
        struct snd_soc_component *component = dai->component;
        struct snd_pcm_runtime *rtd = substream->runtime;
        int rate, err;

        rate = state->audio_samplerate;
        err = snd_pcm_hw_constraint_minmax(rtd, SNDRV_PCM_HW_PARAM_RATE,
                                           rate, rate);
        if (err < 0) {
                dev_err(component->dev, "failed to constrain samplerate to %dHz\n",
                        rate);
                return err;
        }
        dev_info(component->dev, "set samplerate constraint to %dHz\n", rate);

        return 0;
}

static const struct snd_soc_dai_ops tda1997x_dai_ops = {
        .startup = tda1997x_pcm_startup,
};

static struct snd_soc_dai_driver tda1997x_audio_dai = {
        .name = "tda1997x",
        .capture = {
                .stream_name = "Capture",
                .channels_min = 2,
                .channels_max = 8,
                .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,
        },
        .ops = &tda1997x_dai_ops,
};

static int tda1997x_codec_probe(struct snd_soc_component *component)
{
        return 0;
}

static void tda1997x_codec_remove(struct snd_soc_component *component)
{
}

static struct snd_soc_component_driver tda1997x_codec_driver = {
        .probe                  = tda1997x_codec_probe,
        .remove                 = tda1997x_codec_remove,
        .idle_bias_on           = 1,
        .use_pmdown_time        = 1,
        .endianness             = 1,
        .non_legacy_dai_naming  = 1,
};

static int tda1997x_probe(struct i2c_client *client,
                         const struct i2c_device_id *id)
{
        struct tda1997x_state *state;
        struct tda1997x_platform_data *pdata;
        struct v4l2_subdev *sd;
        struct v4l2_ctrl_handler *hdl;
        struct v4l2_ctrl *ctrl;
        static const struct v4l2_dv_timings cea1920x1080 =
                V4L2_DV_BT_CEA_1920X1080P60;
        u32 *mbus_codes;
        int i, ret;

        /* Check if the adapter supports the needed features */
        if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA))
                return -EIO;

        state = kzalloc(sizeof(struct tda1997x_state), GFP_KERNEL);
        if (!state)
                return -ENOMEM;

        state->client = client;
        pdata = &state->pdata;
        if (IS_ENABLED(CONFIG_OF) && client->dev.of_node) {
                const struct of_device_id *oid;

                oid = of_match_node(tda1997x_of_id, client->dev.of_node);
                state->info = oid->data;

                ret = tda1997x_parse_dt(state);
                if (ret < 0) {
                        v4l_err(client, "DT parsing error\n");
                        goto err_free_state;
                }
        } else if (client->dev.platform_data) {
                struct tda1997x_platform_data *pdata =
                        client->dev.platform_data;
                state->info =
                        (const struct tda1997x_chip_info *)id->driver_data;
                state->pdata = *pdata;
        } else {
                v4l_err(client, "No platform data\n");
                ret = -ENODEV;
                goto err_free_state;
        }

        ret = tda1997x_get_regulators(state);
        if (ret)
                goto err_free_state;

        ret = tda1997x_set_power(state, 1);
        if (ret)
                goto err_free_state;

        mutex_init(&state->page_lock);
        mutex_init(&state->lock);
        state->page = 0xff;

        INIT_DELAYED_WORK(&state->delayed_work_enable_hpd,
                          tda1997x_delayed_work_enable_hpd);

        /* set video format based on chip and bus width */
        ret = tda1997x_identify_module(state);
        if (ret)
                goto err_free_mutex;

        /* initialize subdev */
        sd = &state->sd;
        v4l2_i2c_subdev_init(sd, client, &tda1997x_subdev_ops);
        snprintf(sd->name, sizeof(sd->name), "%s %d-%04x",
                 id->name, i2c_adapter_id(client->adapter),
                 client->addr);
        sd->flags |= V4L2_SUBDEV_FL_HAS_DEVNODE | V4L2_SUBDEV_FL_HAS_EVENTS;
        sd->entity.function = MEDIA_ENT_F_DV_DECODER;
        sd->entity.ops = &tda1997x_media_ops;

        /* set allowed mbus modes based on chip, bus-type, and bus-width */
        i = 0;
        mbus_codes = state->mbus_codes;
        switch (state->info->type) {
        case TDA19973:
                switch (pdata->vidout_bus_type) {
                case V4L2_MBUS_PARALLEL:
                        switch (pdata->vidout_bus_width) {
                        case 36:
                                mbus_codes[i++] = MEDIA_BUS_FMT_RGB121212_1X36;
                                mbus_codes[i++] = MEDIA_BUS_FMT_YUV12_1X36;
                                fallthrough;
                        case 24:
                                mbus_codes[i++] = MEDIA_BUS_FMT_UYVY12_1X24;
                                break;
                        }
                        break;
                case V4L2_MBUS_BT656:
                        switch (pdata->vidout_bus_width) {
                        case 36:
                        case 24:
                        case 12:
                                mbus_codes[i++] = MEDIA_BUS_FMT_UYVY12_2X12;
                                mbus_codes[i++] = MEDIA_BUS_FMT_UYVY10_2X10;
                                mbus_codes[i++] = MEDIA_BUS_FMT_UYVY8_2X8;
                                break;
                        }
                        break;
                default:
                        break;
                }
                break;
        case TDA19971:
                switch (pdata->vidout_bus_type) {
                case V4L2_MBUS_PARALLEL:
                        switch (pdata->vidout_bus_width) {
                        case 24:
                                mbus_codes[i++] = MEDIA_BUS_FMT_RGB888_1X24;
                                mbus_codes[i++] = MEDIA_BUS_FMT_YUV8_1X24;
                                mbus_codes[i++] = MEDIA_BUS_FMT_UYVY12_1X24;
                                fallthrough;
                        case 20:
                                mbus_codes[i++] = MEDIA_BUS_FMT_UYVY10_1X20;
                                fallthrough;
                        case 16:
                                mbus_codes[i++] = MEDIA_BUS_FMT_UYVY8_1X16;
                                break;
                        }
                        break;
                case V4L2_MBUS_BT656:
                        switch (pdata->vidout_bus_width) {
                        case 24:
                        case 20:
                        case 16:
                        case 12:
                                mbus_codes[i++] = MEDIA_BUS_FMT_UYVY12_2X12;
                                fallthrough;
                        case 10:
                                mbus_codes[i++] = MEDIA_BUS_FMT_UYVY10_2X10;
                                fallthrough;
                        case 8:
                                mbus_codes[i++] = MEDIA_BUS_FMT_UYVY8_2X8;
                                break;
                        }
                        break;
                default:
                        break;
                }
                break;
        }
        if (WARN_ON(i > ARRAY_SIZE(state->mbus_codes))) {
                ret = -EINVAL;
                goto err_free_mutex;
        }

        /* default format */
        tda1997x_setup_format(state, state->mbus_codes[0]);
        state->timings = cea1920x1080;

        /*
         * default to SRGB full range quantization
         * (in case we don't get an infoframe such as DVI signal
         */
        state->colorimetry.colorspace = V4L2_COLORSPACE_SRGB;
        state->colorimetry.quantization = V4L2_QUANTIZATION_FULL_RANGE;

        /* disable/reset HDCP to get correct I2C access to Rx HDMI */
        io_write(sd, REG_MAN_SUS_HDMI_SEL, MAN_RST_HDCP | MAN_DIS_HDCP);

        /*
         * if N2 version, reset compdel_bp as it may generate some small pixel
         * shifts in case of embedded sync/or delay lower than 4
         */
        if (state->chip_revision != 0) {
                io_write(sd, REG_MAN_SUS_HDMI_SEL, 0x00);
                io_write(sd, REG_VDP_CTRL, 0x1f);
        }

        v4l_info(client, "NXP %s N%d detected\n", state->info->name,
                 state->chip_revision + 1);
        v4l_info(client, "video: %dbit %s %d formats available\n",
                pdata->vidout_bus_width,
                (pdata->vidout_bus_type == V4L2_MBUS_PARALLEL) ?
                        "parallel" : "BT656",
                i);
        if (pdata->audout_format) {
                v4l_info(client, "audio: %dch %s layout%d sysclk=%d*fs\n",
                         pdata->audout_layout ? 2 : 8,
                         audfmt_names[pdata->audout_format],
                         pdata->audout_layout,
                         pdata->audout_mclk_fs);
        }

        ret = 0x34 + ((io_read(sd, REG_SLAVE_ADDR)>>4) & 0x03);
        state->client_cec = devm_i2c_new_dummy_device(&client->dev,
                                                      client->adapter, ret);
        if (IS_ERR(state->client_cec)) {
                ret = PTR_ERR(state->client_cec);
                goto err_free_mutex;
        }

        v4l_info(client, "CEC slave address 0x%02x\n", ret);

        ret = tda1997x_core_init(sd);
        if (ret)
                goto err_free_mutex;

        /* control handlers */
        hdl = &state->hdl;
        v4l2_ctrl_handler_init(hdl, 3);
        ctrl = v4l2_ctrl_new_std_menu(hdl, &tda1997x_ctrl_ops,
                        V4L2_CID_DV_RX_IT_CONTENT_TYPE,
                        V4L2_DV_IT_CONTENT_TYPE_NO_ITC, 0,
                        V4L2_DV_IT_CONTENT_TYPE_NO_ITC);
        if (ctrl)
                ctrl->flags |= V4L2_CTRL_FLAG_VOLATILE;
        /* custom controls */
        state->detect_tx_5v_ctrl = v4l2_ctrl_new_std(hdl, NULL,
                        V4L2_CID_DV_RX_POWER_PRESENT, 0, 1, 0, 0);
        state->rgb_quantization_range_ctrl = v4l2_ctrl_new_std_menu(hdl,
                        &tda1997x_ctrl_ops,
                        V4L2_CID_DV_RX_RGB_RANGE, V4L2_DV_RGB_RANGE_FULL, 0,
                        V4L2_DV_RGB_RANGE_AUTO);
        state->sd.ctrl_handler = hdl;
        if (hdl->error) {
                ret = hdl->error;
                goto err_free_handler;
        }
        v4l2_ctrl_handler_setup(hdl);

        /* initialize source pads */
        state->pads[TDA1997X_PAD_SOURCE].flags = MEDIA_PAD_FL_SOURCE;
        ret = media_entity_pads_init(&sd->entity, TDA1997X_NUM_PADS,
                state->pads);
        if (ret) {
                v4l_err(client, "failed entity_init: %d", ret);
                goto err_free_handler;
        }

        ret = v4l2_async_register_subdev(sd);
        if (ret)
                goto err_free_media;

        /* register audio DAI */
        if (pdata->audout_format) {
                u64 formats;

                if (pdata->audout_width == 32)
                        formats = SNDRV_PCM_FMTBIT_S32_LE;
                else
                        formats = SNDRV_PCM_FMTBIT_S16_LE;
                tda1997x_audio_dai.capture.formats = formats;
                ret = devm_snd_soc_register_component(&state->client->dev,
                                             &tda1997x_codec_driver,
                                             &tda1997x_audio_dai, 1);
                if (ret) {
                        dev_err(&client->dev, "register audio codec failed\n");
                        goto err_free_media;
                }
                v4l_info(state->client, "registered audio codec\n");
        }

        /* request irq */
        ret = devm_request_threaded_irq(&client->dev, client->irq,
                                        NULL, tda1997x_isr_thread,
                                        IRQF_TRIGGER_LOW | IRQF_ONESHOT,
                                        KBUILD_MODNAME, state);
        if (ret) {
                v4l_err(client, "irq%d reg failed: %d\n", client->irq, ret);
                goto err_free_media;
        }

        return 0;

err_free_media:
        media_entity_cleanup(&sd->entity);
err_free_handler:
        v4l2_ctrl_handler_free(&state->hdl);
err_free_mutex:
        cancel_delayed_work(&state->delayed_work_enable_hpd);
        mutex_destroy(&state->page_lock);
        mutex_destroy(&state->lock);
err_free_state:
        kfree(state);
        dev_err(&client->dev, "%s failed: %d\n", __func__, ret);

        return ret;
}

static int tda1997x_remove(struct i2c_client *client)
{
        struct v4l2_subdev *sd = i2c_get_clientdata(client);
        struct tda1997x_state *state = to_state(sd);
        struct tda1997x_platform_data *pdata = &state->pdata;

        if (pdata->audout_format) {
                mutex_destroy(&state->audio_lock);
        }

        disable_irq(state->client->irq);
        tda1997x_power_mode(state, 0);

        v4l2_async_unregister_subdev(sd);
        media_entity_cleanup(&sd->entity);
        v4l2_ctrl_handler_free(&state->hdl);
        regulator_bulk_disable(TDA1997X_NUM_SUPPLIES, state->supplies);
        cancel_delayed_work_sync(&state->delayed_work_enable_hpd);
        mutex_destroy(&state->page_lock);
        mutex_destroy(&state->lock);

        kfree(state);

        return 0;
}

static struct i2c_driver tda1997x_i2c_driver = {
        .driver = {
                .name = "tda1997x",
                .of_match_table = of_match_ptr(tda1997x_of_id),
        },
        .probe = tda1997x_probe,
        .remove = tda1997x_remove,
        .id_table = tda1997x_i2c_id,
};

module_i2c_driver(tda1997x_i2c_driver);

MODULE_AUTHOR("Tim Harvey <tharvey@gateworks.com>");
MODULE_DESCRIPTION("TDA1997X HDMI Receiver driver");
MODULE_LICENSE("GPL v2");