/*
 * adv7604 - Analog Devices ADV7604 video decoder driver
 *
 * Copyright 2012 Cisco Systems, Inc. and/or its affiliates. All rights reserved.
 *
 * This program is free software; you may redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; version 2 of the License.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 *
 */

/*
 * References (c = chapter, p = page):
 * REF_01 - Analog devices, ADV7604, Register Settings Recommendations,
 *              Revision 2.5, June 2010
 * REF_02 - Analog devices, Register map documentation, Documentation of
 *              the register maps, Software manual, Rev. F, June 2010
 * REF_03 - Analog devices, ADV7604, Hardware Manual, Rev. F, August 2010
 */


#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/slab.h>
#include <linux/i2c.h>
#include <linux/delay.h>
#include <linux/videodev2.h>
#include <linux/workqueue.h>
#include <linux/v4l2-dv-timings.h>
#include <media/v4l2-device.h>
#include <media/v4l2-ctrls.h>
#include <media/v4l2-dv-timings.h>
#include <media/adv7604.h>

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

MODULE_DESCRIPTION("Analog Devices ADV7604 video decoder driver");
MODULE_AUTHOR("Hans Verkuil <hans.verkuil@cisco.com>");
MODULE_AUTHOR("Mats Randgaard <mats.randgaard@cisco.com>");
MODULE_LICENSE("GPL");

/* ADV7604 system clock frequency */
#define ADV7604_fsc (28636360)

#define DIGITAL_INPUT (state->mode == ADV7604_MODE_HDMI)

/*
 **********************************************************************
 *
 *  Arrays with configuration parameters for the ADV7604
 *
 **********************************************************************
 */
struct adv7604_state {
        struct adv7604_platform_data pdata;
        struct v4l2_subdev sd;
        struct media_pad pad;
        struct v4l2_ctrl_handler hdl;
        enum adv7604_mode mode;
        struct v4l2_dv_timings timings;
        u8 edid[256];
        unsigned edid_blocks;
        struct v4l2_fract aspect_ratio;
        u32 rgb_quantization_range;
        struct workqueue_struct *work_queues;
        struct delayed_work delayed_work_enable_hotplug;
        bool connector_hdmi;
        bool restart_stdi_once;
        u32 prev_input_status;

        /* i2c clients */
        struct i2c_client *i2c_avlink;
        struct i2c_client *i2c_cec;
        struct i2c_client *i2c_infoframe;
        struct i2c_client *i2c_esdp;
        struct i2c_client *i2c_dpp;
        struct i2c_client *i2c_afe;
        struct i2c_client *i2c_repeater;
        struct i2c_client *i2c_edid;
        struct i2c_client *i2c_hdmi;
        struct i2c_client *i2c_test;
        struct i2c_client *i2c_cp;
        struct i2c_client *i2c_vdp;

        /* controls */
        struct v4l2_ctrl *detect_tx_5v_ctrl;
        struct v4l2_ctrl *analog_sampling_phase_ctrl;
        struct v4l2_ctrl *free_run_color_manual_ctrl;
        struct v4l2_ctrl *free_run_color_ctrl;
        struct v4l2_ctrl *rgb_quantization_range_ctrl;
};

/* Supported CEA and DMT timings */
static const struct v4l2_dv_timings adv7604_timings[] = {
        V4L2_DV_BT_CEA_720X480P59_94,
        V4L2_DV_BT_CEA_720X576P50,
        V4L2_DV_BT_CEA_1280X720P24,
        V4L2_DV_BT_CEA_1280X720P25,
        V4L2_DV_BT_CEA_1280X720P50,
        V4L2_DV_BT_CEA_1280X720P60,
        V4L2_DV_BT_CEA_1920X1080P24,
        V4L2_DV_BT_CEA_1920X1080P25,
        V4L2_DV_BT_CEA_1920X1080P30,
        V4L2_DV_BT_CEA_1920X1080P50,
        V4L2_DV_BT_CEA_1920X1080P60,

        /* sorted by DMT ID */
        V4L2_DV_BT_DMT_640X350P85,
        V4L2_DV_BT_DMT_640X400P85,
        V4L2_DV_BT_DMT_720X400P85,
        V4L2_DV_BT_DMT_640X480P60,
        V4L2_DV_BT_DMT_640X480P72,
        V4L2_DV_BT_DMT_640X480P75,
        V4L2_DV_BT_DMT_640X480P85,
        V4L2_DV_BT_DMT_800X600P56,
        V4L2_DV_BT_DMT_800X600P60,
        V4L2_DV_BT_DMT_800X600P72,
        V4L2_DV_BT_DMT_800X600P75,
        V4L2_DV_BT_DMT_800X600P85,
        V4L2_DV_BT_DMT_848X480P60,
        V4L2_DV_BT_DMT_1024X768P60,
        V4L2_DV_BT_DMT_1024X768P70,
        V4L2_DV_BT_DMT_1024X768P75,
        V4L2_DV_BT_DMT_1024X768P85,
        V4L2_DV_BT_DMT_1152X864P75,
        V4L2_DV_BT_DMT_1280X768P60_RB,
        V4L2_DV_BT_DMT_1280X768P60,
        V4L2_DV_BT_DMT_1280X768P75,
        V4L2_DV_BT_DMT_1280X768P85,
        V4L2_DV_BT_DMT_1280X800P60_RB,
        V4L2_DV_BT_DMT_1280X800P60,
        V4L2_DV_BT_DMT_1280X800P75,
        V4L2_DV_BT_DMT_1280X800P85,
        V4L2_DV_BT_DMT_1280X960P60,
        V4L2_DV_BT_DMT_1280X960P85,
        V4L2_DV_BT_DMT_1280X1024P60,
        V4L2_DV_BT_DMT_1280X1024P75,
        V4L2_DV_BT_DMT_1280X1024P85,
        V4L2_DV_BT_DMT_1360X768P60,
        V4L2_DV_BT_DMT_1400X1050P60_RB,
        V4L2_DV_BT_DMT_1400X1050P60,
        V4L2_DV_BT_DMT_1400X1050P75,
        V4L2_DV_BT_DMT_1400X1050P85,
        V4L2_DV_BT_DMT_1440X900P60_RB,
        V4L2_DV_BT_DMT_1440X900P60,
        V4L2_DV_BT_DMT_1600X1200P60,
        V4L2_DV_BT_DMT_1680X1050P60_RB,
        V4L2_DV_BT_DMT_1680X1050P60,
        V4L2_DV_BT_DMT_1792X1344P60,
        V4L2_DV_BT_DMT_1856X1392P60,
        V4L2_DV_BT_DMT_1920X1200P60_RB,
        V4L2_DV_BT_DMT_1366X768P60,
        V4L2_DV_BT_DMT_1920X1080P60,
        { },
};

struct adv7604_video_standards {
        struct v4l2_dv_timings timings;
        u8 vid_std;
        u8 v_freq;
};

/* sorted by number of lines */
static const struct adv7604_video_standards adv7604_prim_mode_comp[] = {
        /* { V4L2_DV_BT_CEA_720X480P59_94, 0x0a, 0x00 }, TODO flickering */
        { V4L2_DV_BT_CEA_720X576P50, 0x0b, 0x00 },
        { V4L2_DV_BT_CEA_1280X720P50, 0x19, 0x01 },
        { V4L2_DV_BT_CEA_1280X720P60, 0x19, 0x00 },
        { V4L2_DV_BT_CEA_1920X1080P24, 0x1e, 0x04 },
        { V4L2_DV_BT_CEA_1920X1080P25, 0x1e, 0x03 },
        { V4L2_DV_BT_CEA_1920X1080P30, 0x1e, 0x02 },
        { V4L2_DV_BT_CEA_1920X1080P50, 0x1e, 0x01 },
        { V4L2_DV_BT_CEA_1920X1080P60, 0x1e, 0x00 },
        /* TODO add 1920x1080P60_RB (CVT timing) */
        { },
};

/* sorted by number of lines */
static const struct adv7604_video_standards adv7604_prim_mode_gr[] = {
        { V4L2_DV_BT_DMT_640X480P60, 0x08, 0x00 },
        { V4L2_DV_BT_DMT_640X480P72, 0x09, 0x00 },
        { V4L2_DV_BT_DMT_640X480P75, 0x0a, 0x00 },
        { V4L2_DV_BT_DMT_640X480P85, 0x0b, 0x00 },
        { V4L2_DV_BT_DMT_800X600P56, 0x00, 0x00 },
        { V4L2_DV_BT_DMT_800X600P60, 0x01, 0x00 },
        { V4L2_DV_BT_DMT_800X600P72, 0x02, 0x00 },
        { V4L2_DV_BT_DMT_800X600P75, 0x03, 0x00 },
        { V4L2_DV_BT_DMT_800X600P85, 0x04, 0x00 },
        { V4L2_DV_BT_DMT_1024X768P60, 0x0c, 0x00 },
        { V4L2_DV_BT_DMT_1024X768P70, 0x0d, 0x00 },
        { V4L2_DV_BT_DMT_1024X768P75, 0x0e, 0x00 },
        { V4L2_DV_BT_DMT_1024X768P85, 0x0f, 0x00 },
        { V4L2_DV_BT_DMT_1280X1024P60, 0x05, 0x00 },
        { V4L2_DV_BT_DMT_1280X1024P75, 0x06, 0x00 },
        { V4L2_DV_BT_DMT_1360X768P60, 0x12, 0x00 },
        { V4L2_DV_BT_DMT_1366X768P60, 0x13, 0x00 },
        { V4L2_DV_BT_DMT_1400X1050P60, 0x14, 0x00 },
        { V4L2_DV_BT_DMT_1400X1050P75, 0x15, 0x00 },
        { V4L2_DV_BT_DMT_1600X1200P60, 0x16, 0x00 }, /* TODO not tested */
        /* TODO add 1600X1200P60_RB (not a DMT timing) */
        { V4L2_DV_BT_DMT_1680X1050P60, 0x18, 0x00 },
        { V4L2_DV_BT_DMT_1920X1200P60_RB, 0x19, 0x00 }, /* TODO not tested */
        { },
};

/* sorted by number of lines */
static const struct adv7604_video_standards adv7604_prim_mode_hdmi_comp[] = {
        { V4L2_DV_BT_CEA_720X480P59_94, 0x0a, 0x00 },
        { V4L2_DV_BT_CEA_720X576P50, 0x0b, 0x00 },
        { V4L2_DV_BT_CEA_1280X720P50, 0x13, 0x01 },
        { V4L2_DV_BT_CEA_1280X720P60, 0x13, 0x00 },
        { V4L2_DV_BT_CEA_1920X1080P24, 0x1e, 0x04 },
        { V4L2_DV_BT_CEA_1920X1080P25, 0x1e, 0x03 },
        { V4L2_DV_BT_CEA_1920X1080P30, 0x1e, 0x02 },
        { V4L2_DV_BT_CEA_1920X1080P50, 0x1e, 0x01 },
        { V4L2_DV_BT_CEA_1920X1080P60, 0x1e, 0x00 },
        { },
};

/* sorted by number of lines */
static const struct adv7604_video_standards adv7604_prim_mode_hdmi_gr[] = {
        { V4L2_DV_BT_DMT_640X480P60, 0x08, 0x00 },
        { V4L2_DV_BT_DMT_640X480P72, 0x09, 0x00 },
        { V4L2_DV_BT_DMT_640X480P75, 0x0a, 0x00 },
        { V4L2_DV_BT_DMT_640X480P85, 0x0b, 0x00 },
        { V4L2_DV_BT_DMT_800X600P56, 0x00, 0x00 },
        { V4L2_DV_BT_DMT_800X600P60, 0x01, 0x00 },
        { V4L2_DV_BT_DMT_800X600P72, 0x02, 0x00 },
        { V4L2_DV_BT_DMT_800X600P75, 0x03, 0x00 },
        { V4L2_DV_BT_DMT_800X600P85, 0x04, 0x00 },
        { V4L2_DV_BT_DMT_1024X768P60, 0x0c, 0x00 },
        { V4L2_DV_BT_DMT_1024X768P70, 0x0d, 0x00 },
        { V4L2_DV_BT_DMT_1024X768P75, 0x0e, 0x00 },
        { V4L2_DV_BT_DMT_1024X768P85, 0x0f, 0x00 },
        { V4L2_DV_BT_DMT_1280X1024P60, 0x05, 0x00 },
        { V4L2_DV_BT_DMT_1280X1024P75, 0x06, 0x00 },
        { },
};

/* ----------------------------------------------------------------------- */

static inline struct adv7604_state *to_state(struct v4l2_subdev *sd)
{
        return container_of(sd, struct adv7604_state, sd);
}

static inline struct v4l2_subdev *to_sd(struct v4l2_ctrl *ctrl)
{
        return &container_of(ctrl->handler, struct adv7604_state, hdl)->sd;
}

static inline unsigned hblanking(const struct v4l2_bt_timings *t)
{
        return V4L2_DV_BT_BLANKING_WIDTH(t);
}

static inline unsigned htotal(const struct v4l2_bt_timings *t)
{
        return V4L2_DV_BT_FRAME_WIDTH(t);
}

static inline unsigned vblanking(const struct v4l2_bt_timings *t)
{
        return V4L2_DV_BT_BLANKING_HEIGHT(t);
}

static inline unsigned vtotal(const struct v4l2_bt_timings *t)
{
        return V4L2_DV_BT_FRAME_HEIGHT(t);
}

/* ----------------------------------------------------------------------- */

static s32 adv_smbus_read_byte_data_check(struct i2c_client *client,
                u8 command, bool check)
{
        union i2c_smbus_data data;

        if (!i2c_smbus_xfer(client->adapter, client->addr, client->flags,
                        I2C_SMBUS_READ, command,
                        I2C_SMBUS_BYTE_DATA, &data))
                return data.byte;
        if (check)
                v4l_err(client, "error reading %02x, %02x\n",
                                client->addr, command);
        return -EIO;
}

static s32 adv_smbus_read_byte_data(struct i2c_client *client, u8 command)
{
        return adv_smbus_read_byte_data_check(client, command, true);
}

static s32 adv_smbus_write_byte_data(struct i2c_client *client,
                                        u8 command, u8 value)
{
        union i2c_smbus_data data;
        int err;
        int i;

        data.byte = value;
        for (i = 0; i < 3; i++) {
                err = i2c_smbus_xfer(client->adapter, client->addr,
                                client->flags,
                                I2C_SMBUS_WRITE, command,
                                I2C_SMBUS_BYTE_DATA, &data);
                if (!err)
                        break;
        }
        if (err < 0)
                v4l_err(client, "error writing %02x, %02x, %02x\n",
                                client->addr, command, value);
        return err;
}

static s32 adv_smbus_write_i2c_block_data(struct i2c_client *client,
               u8 command, unsigned length, const u8 *values)
{
        union i2c_smbus_data data;

        if (length > I2C_SMBUS_BLOCK_MAX)
                length = I2C_SMBUS_BLOCK_MAX;
        data.block[0] = length;
        memcpy(data.block + 1, values, length);
        return i2c_smbus_xfer(client->adapter, client->addr, client->flags,
                              I2C_SMBUS_WRITE, command,
                              I2C_SMBUS_I2C_BLOCK_DATA, &data);
}

/* ----------------------------------------------------------------------- */

static inline int io_read(struct v4l2_subdev *sd, u8 reg)
{
        struct i2c_client *client = v4l2_get_subdevdata(sd);

        return adv_smbus_read_byte_data(client, reg);
}

static inline int io_write(struct v4l2_subdev *sd, u8 reg, u8 val)
{
        struct i2c_client *client = v4l2_get_subdevdata(sd);

        return adv_smbus_write_byte_data(client, reg, val);
}

static inline int io_write_and_or(struct v4l2_subdev *sd, u8 reg, u8 mask, u8 val)
{
        return io_write(sd, reg, (io_read(sd, reg) & mask) | val);
}

static inline int avlink_read(struct v4l2_subdev *sd, u8 reg)
{
        struct adv7604_state *state = to_state(sd);

        return adv_smbus_read_byte_data(state->i2c_avlink, reg);
}

static inline int avlink_write(struct v4l2_subdev *sd, u8 reg, u8 val)
{
        struct adv7604_state *state = to_state(sd);

        return adv_smbus_write_byte_data(state->i2c_avlink, reg, val);
}

static inline int cec_read(struct v4l2_subdev *sd, u8 reg)
{
        struct adv7604_state *state = to_state(sd);

        return adv_smbus_read_byte_data(state->i2c_cec, reg);
}

static inline int cec_write(struct v4l2_subdev *sd, u8 reg, u8 val)
{
        struct adv7604_state *state = to_state(sd);

        return adv_smbus_write_byte_data(state->i2c_cec, reg, val);
}

static inline int cec_write_and_or(struct v4l2_subdev *sd, u8 reg, u8 mask, u8 val)
{
        return cec_write(sd, reg, (cec_read(sd, reg) & mask) | val);
}

static inline int infoframe_read(struct v4l2_subdev *sd, u8 reg)
{
        struct adv7604_state *state = to_state(sd);

        return adv_smbus_read_byte_data(state->i2c_infoframe, reg);
}

static inline int infoframe_write(struct v4l2_subdev *sd, u8 reg, u8 val)
{
        struct adv7604_state *state = to_state(sd);

        return adv_smbus_write_byte_data(state->i2c_infoframe, reg, val);
}

static inline int esdp_read(struct v4l2_subdev *sd, u8 reg)
{
        struct adv7604_state *state = to_state(sd);

        return adv_smbus_read_byte_data(state->i2c_esdp, reg);
}

static inline int esdp_write(struct v4l2_subdev *sd, u8 reg, u8 val)
{
        struct adv7604_state *state = to_state(sd);

        return adv_smbus_write_byte_data(state->i2c_esdp, reg, val);
}

static inline int dpp_read(struct v4l2_subdev *sd, u8 reg)
{
        struct adv7604_state *state = to_state(sd);

        return adv_smbus_read_byte_data(state->i2c_dpp, reg);
}

static inline int dpp_write(struct v4l2_subdev *sd, u8 reg, u8 val)
{
        struct adv7604_state *state = to_state(sd);

        return adv_smbus_write_byte_data(state->i2c_dpp, reg, val);
}

static inline int afe_read(struct v4l2_subdev *sd, u8 reg)
{
        struct adv7604_state *state = to_state(sd);

        return adv_smbus_read_byte_data(state->i2c_afe, reg);
}

static inline int afe_write(struct v4l2_subdev *sd, u8 reg, u8 val)
{
        struct adv7604_state *state = to_state(sd);

        return adv_smbus_write_byte_data(state->i2c_afe, reg, val);
}

static inline int rep_read(struct v4l2_subdev *sd, u8 reg)
{
        struct adv7604_state *state = to_state(sd);

        return adv_smbus_read_byte_data(state->i2c_repeater, reg);
}

static inline int rep_write(struct v4l2_subdev *sd, u8 reg, u8 val)
{
        struct adv7604_state *state = to_state(sd);

        return adv_smbus_write_byte_data(state->i2c_repeater, reg, val);
}

static inline int rep_write_and_or(struct v4l2_subdev *sd, u8 reg, u8 mask, u8 val)
{
        return rep_write(sd, reg, (rep_read(sd, reg) & mask) | val);
}

static inline int edid_read(struct v4l2_subdev *sd, u8 reg)
{
        struct adv7604_state *state = to_state(sd);

        return adv_smbus_read_byte_data(state->i2c_edid, reg);
}

static inline int edid_write(struct v4l2_subdev *sd, u8 reg, u8 val)
{
        struct adv7604_state *state = to_state(sd);

        return adv_smbus_write_byte_data(state->i2c_edid, reg, val);
}

static inline int edid_read_block(struct v4l2_subdev *sd, unsigned len, u8 *val)
{
        struct adv7604_state *state = to_state(sd);
        struct i2c_client *client = state->i2c_edid;
        u8 msgbuf0[1] = { 0 };
        u8 msgbuf1[256];
        struct i2c_msg msg[2] = {
                {
                        .addr = client->addr,
                        .len = 1,
                        .buf = msgbuf0
                },
                {
                        .addr = client->addr,
                        .flags = I2C_M_RD,
                        .len = len,
                        .buf = msgbuf1
                },
        };

        if (i2c_transfer(client->adapter, msg, 2) < 0)
                return -EIO;
        memcpy(val, msgbuf1, len);
        return 0;
}

static void adv7604_delayed_work_enable_hotplug(struct work_struct *work)
{
        struct delayed_work *dwork = to_delayed_work(work);
        struct adv7604_state *state = container_of(dwork, struct adv7604_state,
                                                delayed_work_enable_hotplug);
        struct v4l2_subdev *sd = &state->sd;

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

        v4l2_subdev_notify(sd, ADV7604_HOTPLUG, (void *)1);
}

static inline int edid_write_block(struct v4l2_subdev *sd,
                                        unsigned len, const u8 *val)
{
        struct i2c_client *client = v4l2_get_subdevdata(sd);
        struct adv7604_state *state = to_state(sd);
        int err = 0;
        int i;

        v4l2_dbg(2, debug, sd, "%s: write EDID block (%d byte)\n", __func__, len);

        v4l2_subdev_notify(sd, ADV7604_HOTPLUG, (void *)0);

        /* Disables I2C access to internal EDID ram from DDC port */
        rep_write_and_or(sd, 0x77, 0xf0, 0x0);

        for (i = 0; !err && i < len; i += I2C_SMBUS_BLOCK_MAX)
                err = adv_smbus_write_i2c_block_data(state->i2c_edid, i,
                                I2C_SMBUS_BLOCK_MAX, val + i);
        if (err)
                return err;

        /* adv7604 calculates the checksums and enables I2C access to internal
           EDID ram from DDC port. */
        rep_write_and_or(sd, 0x77, 0xf0, 0x1);

        for (i = 0; i < 1000; i++) {
                if (rep_read(sd, 0x7d) & 1)
                        break;
                mdelay(1);
        }
        if (i == 1000) {
                v4l_err(client, "error enabling edid\n");
                return -EIO;
        }

        /* enable hotplug after 100 ms */
        queue_delayed_work(state->work_queues,
                        &state->delayed_work_enable_hotplug, HZ / 10);
        return 0;
}

static inline int hdmi_read(struct v4l2_subdev *sd, u8 reg)
{
        struct adv7604_state *state = to_state(sd);

        return adv_smbus_read_byte_data(state->i2c_hdmi, reg);
}

static inline int hdmi_write(struct v4l2_subdev *sd, u8 reg, u8 val)
{
        struct adv7604_state *state = to_state(sd);

        return adv_smbus_write_byte_data(state->i2c_hdmi, reg, val);
}

static inline int test_read(struct v4l2_subdev *sd, u8 reg)
{
        struct adv7604_state *state = to_state(sd);

        return adv_smbus_read_byte_data(state->i2c_test, reg);
}

static inline int test_write(struct v4l2_subdev *sd, u8 reg, u8 val)
{
        struct adv7604_state *state = to_state(sd);

        return adv_smbus_write_byte_data(state->i2c_test, reg, val);
}

static inline int cp_read(struct v4l2_subdev *sd, u8 reg)
{
        struct adv7604_state *state = to_state(sd);

        return adv_smbus_read_byte_data(state->i2c_cp, reg);
}

static inline int cp_write(struct v4l2_subdev *sd, u8 reg, u8 val)
{
        struct adv7604_state *state = to_state(sd);

        return adv_smbus_write_byte_data(state->i2c_cp, reg, val);
}

static inline int cp_write_and_or(struct v4l2_subdev *sd, u8 reg, u8 mask, u8 val)
{
        return cp_write(sd, reg, (cp_read(sd, reg) & mask) | val);
}

static inline int vdp_read(struct v4l2_subdev *sd, u8 reg)
{
        struct adv7604_state *state = to_state(sd);

        return adv_smbus_read_byte_data(state->i2c_vdp, reg);
}

static inline int vdp_write(struct v4l2_subdev *sd, u8 reg, u8 val)
{
        struct adv7604_state *state = to_state(sd);

        return adv_smbus_write_byte_data(state->i2c_vdp, reg, val);
}

/* ----------------------------------------------------------------------- */

#ifdef CONFIG_VIDEO_ADV_DEBUG
static void adv7604_inv_register(struct v4l2_subdev *sd)
{
        v4l2_info(sd, "0x000-0x0ff: IO Map\n");
        v4l2_info(sd, "0x100-0x1ff: AVLink Map\n");
        v4l2_info(sd, "0x200-0x2ff: CEC Map\n");
        v4l2_info(sd, "0x300-0x3ff: InfoFrame Map\n");
        v4l2_info(sd, "0x400-0x4ff: ESDP Map\n");
        v4l2_info(sd, "0x500-0x5ff: DPP Map\n");
        v4l2_info(sd, "0x600-0x6ff: AFE Map\n");
        v4l2_info(sd, "0x700-0x7ff: Repeater Map\n");
        v4l2_info(sd, "0x800-0x8ff: EDID Map\n");
        v4l2_info(sd, "0x900-0x9ff: HDMI Map\n");
        v4l2_info(sd, "0xa00-0xaff: Test Map\n");
        v4l2_info(sd, "0xb00-0xbff: CP Map\n");
        v4l2_info(sd, "0xc00-0xcff: VDP Map\n");
}

static int adv7604_g_register(struct v4l2_subdev *sd,
                                        struct v4l2_dbg_register *reg)
{
        reg->size = 1;
        switch (reg->reg >> 8) {
        case 0:
                reg->val = io_read(sd, reg->reg & 0xff);
                break;
        case 1:
                reg->val = avlink_read(sd, reg->reg & 0xff);
                break;
        case 2:
                reg->val = cec_read(sd, reg->reg & 0xff);
                break;
        case 3:
                reg->val = infoframe_read(sd, reg->reg & 0xff);
                break;
        case 4:
                reg->val = esdp_read(sd, reg->reg & 0xff);
                break;
        case 5:
                reg->val = dpp_read(sd, reg->reg & 0xff);
                break;
        case 6:
                reg->val = afe_read(sd, reg->reg & 0xff);
                break;
        case 7:
                reg->val = rep_read(sd, reg->reg & 0xff);
                break;
        case 8:
                reg->val = edid_read(sd, reg->reg & 0xff);
                break;
        case 9:
                reg->val = hdmi_read(sd, reg->reg & 0xff);
                break;
        case 0xa:
                reg->val = test_read(sd, reg->reg & 0xff);
                break;
        case 0xb:
                reg->val = cp_read(sd, reg->reg & 0xff);
                break;
        case 0xc:
                reg->val = vdp_read(sd, reg->reg & 0xff);
                break;
        default:
                v4l2_info(sd, "Register %03llx not supported\n", reg->reg);
                adv7604_inv_register(sd);
                break;
        }
        return 0;
}

static int adv7604_s_register(struct v4l2_subdev *sd,
                                        const struct v4l2_dbg_register *reg)
{
        switch (reg->reg >> 8) {
        case 0:
                io_write(sd, reg->reg & 0xff, reg->val & 0xff);
                break;
        case 1:
                avlink_write(sd, reg->reg & 0xff, reg->val & 0xff);
                break;
        case 2:
                cec_write(sd, reg->reg & 0xff, reg->val & 0xff);
                break;
        case 3:
                infoframe_write(sd, reg->reg & 0xff, reg->val & 0xff);
                break;
        case 4:
                esdp_write(sd, reg->reg & 0xff, reg->val & 0xff);
                break;
        case 5:
                dpp_write(sd, reg->reg & 0xff, reg->val & 0xff);
                break;
        case 6:
                afe_write(sd, reg->reg & 0xff, reg->val & 0xff);
                break;
        case 7:
                rep_write(sd, reg->reg & 0xff, reg->val & 0xff);
                break;
        case 8:
                edid_write(sd, reg->reg & 0xff, reg->val & 0xff);
                break;
        case 9:
                hdmi_write(sd, reg->reg & 0xff, reg->val & 0xff);
                break;
        case 0xa:
                test_write(sd, reg->reg & 0xff, reg->val & 0xff);
                break;
        case 0xb:
                cp_write(sd, reg->reg & 0xff, reg->val & 0xff);
                break;
        case 0xc:
                vdp_write(sd, reg->reg & 0xff, reg->val & 0xff);
                break;
        default:
                v4l2_info(sd, "Register %03llx not supported\n", reg->reg);
                adv7604_inv_register(sd);
                break;
        }
        return 0;
}
#endif

static int adv7604_s_detect_tx_5v_ctrl(struct v4l2_subdev *sd)
{
        struct adv7604_state *state = to_state(sd);

        /* port A only */
        return v4l2_ctrl_s_ctrl(state->detect_tx_5v_ctrl,
                                ((io_read(sd, 0x6f) & 0x10) >> 4));
}

static int find_and_set_predefined_video_timings(struct v4l2_subdev *sd,
                u8 prim_mode,
                const struct adv7604_video_standards *predef_vid_timings,
                const struct v4l2_dv_timings *timings)
{
        struct adv7604_state *state = to_state(sd);
        int i;

        for (i = 0; predef_vid_timings[i].timings.bt.width; i++) {
                if (!v4l2_match_dv_timings(timings, &predef_vid_timings[i].timings,
                                        DIGITAL_INPUT ? 250000 : 1000000))
                        continue;
                io_write(sd, 0x00, predef_vid_timings[i].vid_std); /* video std */
                io_write(sd, 0x01, (predef_vid_timings[i].v_freq << 4) +
                                prim_mode); /* v_freq and prim mode */
                return 0;
        }

        return -1;
}

static int configure_predefined_video_timings(struct v4l2_subdev *sd,
                struct v4l2_dv_timings *timings)
{
        struct adv7604_state *state = to_state(sd);
        int err;

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

        /* reset to default values */
        io_write(sd, 0x16, 0x43);
        io_write(sd, 0x17, 0x5a);
        /* disable embedded syncs for auto graphics mode */
        cp_write_and_or(sd, 0x81, 0xef, 0x00);
        cp_write(sd, 0x8f, 0x00);
        cp_write(sd, 0x90, 0x00);
        cp_write(sd, 0xa2, 0x00);
        cp_write(sd, 0xa3, 0x00);
        cp_write(sd, 0xa4, 0x00);
        cp_write(sd, 0xa5, 0x00);
        cp_write(sd, 0xa6, 0x00);
        cp_write(sd, 0xa7, 0x00);
        cp_write(sd, 0xab, 0x00);
        cp_write(sd, 0xac, 0x00);

        switch (state->mode) {
        case ADV7604_MODE_COMP:
        case ADV7604_MODE_GR:
                err = find_and_set_predefined_video_timings(sd,
                                0x01, adv7604_prim_mode_comp, timings);
                if (err)
                        err = find_and_set_predefined_video_timings(sd,
                                        0x02, adv7604_prim_mode_gr, timings);
                break;
        case ADV7604_MODE_HDMI:
                err = find_and_set_predefined_video_timings(sd,
                                0x05, adv7604_prim_mode_hdmi_comp, timings);
                if (err)
                        err = find_and_set_predefined_video_timings(sd,
                                        0x06, adv7604_prim_mode_hdmi_gr, timings);
                break;
        default:
                v4l2_dbg(2, debug, sd, "%s: Unknown mode %d\n",
                                __func__, state->mode);
                err = -1;
                break;
        }


        return err;
}

static void configure_custom_video_timings(struct v4l2_subdev *sd,
                const struct v4l2_bt_timings *bt)
{
        struct adv7604_state *state = to_state(sd);
        struct i2c_client *client = v4l2_get_subdevdata(sd);
        u32 width = htotal(bt);
        u32 height = vtotal(bt);
        u16 cp_start_sav = bt->hsync + bt->hbackporch - 4;
        u16 cp_start_eav = width - bt->hfrontporch;
        u16 cp_start_vbi = height - bt->vfrontporch;
        u16 cp_end_vbi = bt->vsync + bt->vbackporch;
        u16 ch1_fr_ll = (((u32)bt->pixelclock / 100) > 0) ?
                ((width * (ADV7604_fsc / 100)) / ((u32)bt->pixelclock / 100)) : 0;
        const u8 pll[2] = {
                0xc0 | ((width >> 8) & 0x1f),
                width & 0xff
        };

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

        switch (state->mode) {
        case ADV7604_MODE_COMP:
        case ADV7604_MODE_GR:
                /* auto graphics */
                io_write(sd, 0x00, 0x07); /* video std */
                io_write(sd, 0x01, 0x02); /* prim mode */
                /* enable embedded syncs for auto graphics mode */
                cp_write_and_or(sd, 0x81, 0xef, 0x10);

                /* Should only be set in auto-graphics mode [REF_02, p. 91-92] */
                /* setup PLL_DIV_MAN_EN and PLL_DIV_RATIO */
                /* IO-map reg. 0x16 and 0x17 should be written in sequence */
                if (adv_smbus_write_i2c_block_data(client, 0x16, 2, pll)) {
                        v4l2_err(sd, "writing to reg 0x16 and 0x17 failed\n");
                        break;
                }

                /* active video - horizontal timing */
                cp_write(sd, 0xa2, (cp_start_sav >> 4) & 0xff);
                cp_write(sd, 0xa3, ((cp_start_sav & 0x0f) << 4) |
                                        ((cp_start_eav >> 8) & 0x0f));
                cp_write(sd, 0xa4, cp_start_eav & 0xff);

                /* active video - vertical timing */
                cp_write(sd, 0xa5, (cp_start_vbi >> 4) & 0xff);
                cp_write(sd, 0xa6, ((cp_start_vbi & 0xf) << 4) |
                                        ((cp_end_vbi >> 8) & 0xf));
                cp_write(sd, 0xa7, cp_end_vbi & 0xff);
                break;
        case ADV7604_MODE_HDMI:
                /* set default prim_mode/vid_std for HDMI
                   accoring to [REF_03, c. 4.2] */
                io_write(sd, 0x00, 0x02); /* video std */
                io_write(sd, 0x01, 0x06); /* prim mode */
                break;
        default:
                v4l2_dbg(2, debug, sd, "%s: Unknown mode %d\n",
                                __func__, state->mode);
                break;
        }

        cp_write(sd, 0x8f, (ch1_fr_ll >> 8) & 0x7);
        cp_write(sd, 0x90, ch1_fr_ll & 0xff);
        cp_write(sd, 0xab, (height >> 4) & 0xff);
        cp_write(sd, 0xac, (height & 0x0f) << 4);
}

static void set_rgb_quantization_range(struct v4l2_subdev *sd)
{
        struct adv7604_state *state = to_state(sd);

        switch (state->rgb_quantization_range) {
        case V4L2_DV_RGB_RANGE_AUTO:
                /* automatic */
                if (DIGITAL_INPUT && !(hdmi_read(sd, 0x05) & 0x80)) {
                        /* receiving DVI-D signal */

                        /* ADV7604 selects RGB limited range regardless of
                           input format (CE/IT) in automatic mode */
                        if (state->timings.bt.standards & V4L2_DV_BT_STD_CEA861) {
                                /* RGB limited range (16-235) */
                                io_write_and_or(sd, 0x02, 0x0f, 0x00);

                        } else {
                                /* RGB full range (0-255) */
                                io_write_and_or(sd, 0x02, 0x0f, 0x10);
                        }
                } else {
                        /* receiving HDMI or analog signal, set automode */
                        io_write_and_or(sd, 0x02, 0x0f, 0xf0);
                }
                break;
        case V4L2_DV_RGB_RANGE_LIMITED:
                /* RGB limited range (16-235) */
                io_write_and_or(sd, 0x02, 0x0f, 0x00);
                break;
        case V4L2_DV_RGB_RANGE_FULL:
                /* RGB full range (0-255) */
                io_write_and_or(sd, 0x02, 0x0f, 0x10);
                break;
        }
}


static int adv7604_s_ctrl(struct v4l2_ctrl *ctrl)
{
        struct v4l2_subdev *sd = to_sd(ctrl);
        struct adv7604_state *state = to_state(sd);

        switch (ctrl->id) {
        case V4L2_CID_BRIGHTNESS:
                cp_write(sd, 0x3c, ctrl->val);
                return 0;
        case V4L2_CID_CONTRAST:
                cp_write(sd, 0x3a, ctrl->val);
                return 0;
        case V4L2_CID_SATURATION:
                cp_write(sd, 0x3b, ctrl->val);
                return 0;
        case V4L2_CID_HUE:
                cp_write(sd, 0x3d, ctrl->val);
                return 0;
        case  V4L2_CID_DV_RX_RGB_RANGE:
                state->rgb_quantization_range = ctrl->val;
                set_rgb_quantization_range(sd);
                return 0;
        case V4L2_CID_ADV_RX_ANALOG_SAMPLING_PHASE:
                /* Set the analog sampling phase. This is needed to find the
                   best sampling phase for analog video: an application or
                   driver has to try a number of phases and analyze the picture
                   quality before settling on the best performing phase. */
                afe_write(sd, 0xc8, ctrl->val);
                return 0;
        case V4L2_CID_ADV_RX_FREE_RUN_COLOR_MANUAL:
                /* Use the default blue color for free running mode,
                   or supply your own. */
                cp_write_and_or(sd, 0xbf, ~0x04, (ctrl->val << 2));
                return 0;
        case V4L2_CID_ADV_RX_FREE_RUN_COLOR:
                cp_write(sd, 0xc0, (ctrl->val & 0xff0000) >> 16);
                cp_write(sd, 0xc1, (ctrl->val & 0x00ff00) >> 8);
                cp_write(sd, 0xc2, (u8)(ctrl->val & 0x0000ff));
                return 0;
        }
        return -EINVAL;
}

/* ----------------------------------------------------------------------- */

static inline bool no_power(struct v4l2_subdev *sd)
{
        /* Entire chip or CP powered off */
        return io_read(sd, 0x0c) & 0x24;
}

static inline bool no_signal_tmds(struct v4l2_subdev *sd)
{
        /* TODO port B, C and D */
        return !(io_read(sd, 0x6a) & 0x10);
}

static inline bool no_lock_tmds(struct v4l2_subdev *sd)
{
        return (io_read(sd, 0x6a) & 0xe0) != 0xe0;
}

static inline bool is_hdmi(struct v4l2_subdev *sd)
{
        return hdmi_read(sd, 0x05) & 0x80;
}

static inline bool no_lock_sspd(struct v4l2_subdev *sd)

{
        /* TODO channel 2 */
        return ((cp_read(sd, 0xb5) & 0xd0) != 0xd0);
}

static inline bool no_lock_stdi(struct v4l2_subdev *sd)
{
        /* TODO channel 2 */
        return !(cp_read(sd, 0xb1) & 0x80);
}

static inline bool no_signal(struct v4l2_subdev *sd)
{
        struct adv7604_state *state = to_state(sd);
        bool ret;

        ret = no_power(sd);

        ret |= no_lock_stdi(sd);
        ret |= no_lock_sspd(sd);

        if (DIGITAL_INPUT) {
                ret |= no_lock_tmds(sd);
                ret |= no_signal_tmds(sd);
        }

        return ret;
}

static inline bool no_lock_cp(struct v4l2_subdev *sd)
{
        /* CP has detected a non standard number of lines on the incoming
           video compared to what it is configured to receive by s_dv_timings */
        return io_read(sd, 0x12) & 0x01;
}

static int adv7604_g_input_status(struct v4l2_subdev *sd, u32 *status)
{
        struct adv7604_state *state = to_state(sd);

        *status = 0;
        *status |= no_power(sd) ? V4L2_IN_ST_NO_POWER : 0;
        *status |= no_signal(sd) ? V4L2_IN_ST_NO_SIGNAL : 0;
        if (no_lock_cp(sd))
                *status |= DIGITAL_INPUT ? V4L2_IN_ST_NO_SYNC : V4L2_IN_ST_NO_H_LOCK;

        v4l2_dbg(1, debug, sd, "%s: status = 0x%x\n", __func__, *status);

        return 0;
}

/* ----------------------------------------------------------------------- */

struct stdi_readback {
        u16 bl, lcf, lcvs;
        u8 hs_pol, vs_pol;
        bool interlaced;
};

static int stdi2dv_timings(struct v4l2_subdev *sd,
                struct stdi_readback *stdi,
                struct v4l2_dv_timings *timings)
{
        struct adv7604_state *state = to_state(sd);
        u32 hfreq = (ADV7604_fsc * 8) / stdi->bl;
        u32 pix_clk;
        int i;

        for (i = 0; adv7604_timings[i].bt.height; i++) {
                if (vtotal(&adv7604_timings[i].bt) != stdi->lcf + 1)
                        continue;
                if (adv7604_timings[i].bt.vsync != stdi->lcvs)
                        continue;

                pix_clk = hfreq * htotal(&adv7604_timings[i].bt);

                if ((pix_clk < adv7604_timings[i].bt.pixelclock + 1000000) &&
                    (pix_clk > adv7604_timings[i].bt.pixelclock - 1000000)) {
                        *timings = adv7604_timings[i];
                        return 0;
                }
        }

        if (v4l2_detect_cvt(stdi->lcf + 1, hfreq, stdi->lcvs,
                        (stdi->hs_pol == '+' ? V4L2_DV_HSYNC_POS_POL : 0) |
                        (stdi->vs_pol == '+' ? V4L2_DV_VSYNC_POS_POL : 0),
                        timings))
                return 0;
        if (v4l2_detect_gtf(stdi->lcf + 1, hfreq, stdi->lcvs,
                        (stdi->hs_pol == '+' ? V4L2_DV_HSYNC_POS_POL : 0) |
                        (stdi->vs_pol == '+' ? V4L2_DV_VSYNC_POS_POL : 0),
                        state->aspect_ratio, timings))
                return 0;

        v4l2_dbg(2, debug, sd,
                "%s: No format candidate found for lcvs = %d, lcf=%d, bl = %d, %chsync, %cvsync\n",
                __func__, stdi->lcvs, stdi->lcf, stdi->bl,
                stdi->hs_pol, stdi->vs_pol);
        return -1;
}

static int read_stdi(struct v4l2_subdev *sd, struct stdi_readback *stdi)
{
        if (no_lock_stdi(sd) || no_lock_sspd(sd)) {
                v4l2_dbg(2, debug, sd, "%s: STDI and/or SSPD not locked\n", __func__);
                return -1;
        }

        /* read STDI */
        stdi->bl = ((cp_read(sd, 0xb1) & 0x3f) << 8) | cp_read(sd, 0xb2);
        stdi->lcf = ((cp_read(sd, 0xb3) & 0x7) << 8) | cp_read(sd, 0xb4);
        stdi->lcvs = cp_read(sd, 0xb3) >> 3;
        stdi->interlaced = io_read(sd, 0x12) & 0x10;

        /* read SSPD */
        if ((cp_read(sd, 0xb5) & 0x03) == 0x01) {
                stdi->hs_pol = ((cp_read(sd, 0xb5) & 0x10) ?
                                ((cp_read(sd, 0xb5) & 0x08) ? '+' : '-') : 'x');
                stdi->vs_pol = ((cp_read(sd, 0xb5) & 0x40) ?
                                ((cp_read(sd, 0xb5) & 0x20) ? '+' : '-') : 'x');
        } else {
                stdi->hs_pol = 'x';
                stdi->vs_pol = 'x';
        }

        if (no_lock_stdi(sd) || no_lock_sspd(sd)) {
                v4l2_dbg(2, debug, sd,
                        "%s: signal lost during readout of STDI/SSPD\n", __func__);
                return -1;
        }

        if (stdi->lcf < 239 || stdi->bl < 8 || stdi->bl == 0x3fff) {
                v4l2_dbg(2, debug, sd, "%s: invalid signal\n", __func__);
                memset(stdi, 0, sizeof(struct stdi_readback));
                return -1;
        }

        v4l2_dbg(2, debug, sd,
                "%s: lcf (frame height - 1) = %d, bl = %d, lcvs (vsync) = %d, %chsync, %cvsync, %s\n",
                __func__, stdi->lcf, stdi->bl, stdi->lcvs,
                stdi->hs_pol, stdi->vs_pol,
                stdi->interlaced ? "interlaced" : "progressive");

        return 0;
}

static int adv7604_enum_dv_timings(struct v4l2_subdev *sd,
                        struct v4l2_enum_dv_timings *timings)
{
        if (timings->index >= ARRAY_SIZE(adv7604_timings) - 1)
                return -EINVAL;
        memset(timings->reserved, 0, sizeof(timings->reserved));
        timings->timings = adv7604_timings[timings->index];
        return 0;
}

static int adv7604_dv_timings_cap(struct v4l2_subdev *sd,
                        struct v4l2_dv_timings_cap *cap)
{
        struct adv7604_state *state = to_state(sd);

        cap->type = V4L2_DV_BT_656_1120;
        cap->bt.max_width = 1920;
        cap->bt.max_height = 1200;
        cap->bt.min_pixelclock = 25000000;
        if (DIGITAL_INPUT)
                cap->bt.max_pixelclock = 225000000;
        else
                cap->bt.max_pixelclock = 170000000;
        cap->bt.standards = V4L2_DV_BT_STD_CEA861 | V4L2_DV_BT_STD_DMT |
                         V4L2_DV_BT_STD_GTF | V4L2_DV_BT_STD_CVT;
        cap->bt.capabilities = V4L2_DV_BT_CAP_PROGRESSIVE |
                V4L2_DV_BT_CAP_REDUCED_BLANKING | V4L2_DV_BT_CAP_CUSTOM;
        return 0;
}

/* Fill the optional fields .standards and .flags in struct v4l2_dv_timings
   if the format is listed in adv7604_timings[] */
static void adv7604_fill_optional_dv_timings_fields(struct v4l2_subdev *sd,
                struct v4l2_dv_timings *timings)
{
        struct adv7604_state *state = to_state(sd);
        int i;

        for (i = 0; adv7604_timings[i].bt.width; i++) {
                if (v4l2_match_dv_timings(timings, &adv7604_timings[i],
                                        DIGITAL_INPUT ? 250000 : 1000000)) {
                        *timings = adv7604_timings[i];
                        break;
                }
        }
}

static int adv7604_query_dv_timings(struct v4l2_subdev *sd,
                        struct v4l2_dv_timings *timings)
{
        struct adv7604_state *state = to_state(sd);
        struct v4l2_bt_timings *bt = &timings->bt;
        struct stdi_readback stdi;

        if (!timings)
                return -EINVAL;

        memset(timings, 0, sizeof(struct v4l2_dv_timings));

        if (no_signal(sd)) {
                v4l2_dbg(1, debug, sd, "%s: no valid signal\n", __func__);
                return -ENOLINK;
        }

        /* read STDI */
        if (read_stdi(sd, &stdi)) {
                v4l2_dbg(1, debug, sd, "%s: STDI/SSPD not locked\n", __func__);
                return -ENOLINK;
        }
        bt->interlaced = stdi.interlaced ?
                V4L2_DV_INTERLACED : V4L2_DV_PROGRESSIVE;

        if (DIGITAL_INPUT) {
                uint32_t freq;

                timings->type = V4L2_DV_BT_656_1120;

                bt->width = (hdmi_read(sd, 0x07) & 0x0f) * 256 + hdmi_read(sd, 0x08);
                bt->height = (hdmi_read(sd, 0x09) & 0x0f) * 256 + hdmi_read(sd, 0x0a);
                freq = (hdmi_read(sd, 0x06) * 1000000) +
                        ((hdmi_read(sd, 0x3b) & 0x30) >> 4) * 250000;
                if (is_hdmi(sd)) {
                        /* adjust for deep color mode */
                        unsigned bits_per_channel = ((hdmi_read(sd, 0x0b) & 0x60) >> 4) + 8;

                        freq = freq * 8 / bits_per_channel;
                }
                bt->pixelclock = freq;
                bt->hfrontporch = (hdmi_read(sd, 0x20) & 0x03) * 256 +
                        hdmi_read(sd, 0x21);
                bt->hsync = (hdmi_read(sd, 0x22) & 0x03) * 256 +
                        hdmi_read(sd, 0x23);
                bt->hbackporch = (hdmi_read(sd, 0x24) & 0x03) * 256 +
                        hdmi_read(sd, 0x25);
                bt->vfrontporch = ((hdmi_read(sd, 0x2a) & 0x1f) * 256 +
                        hdmi_read(sd, 0x2b)) / 2;
                bt->vsync = ((hdmi_read(sd, 0x2e) & 0x1f) * 256 +
                        hdmi_read(sd, 0x2f)) / 2;
                bt->vbackporch = ((hdmi_read(sd, 0x32) & 0x1f) * 256 +
                        hdmi_read(sd, 0x33)) / 2;
                bt->polarities = ((hdmi_read(sd, 0x05) & 0x10) ? V4L2_DV_VSYNC_POS_POL : 0) |
                        ((hdmi_read(sd, 0x05) & 0x20) ? V4L2_DV_HSYNC_POS_POL : 0);
                if (bt->interlaced == V4L2_DV_INTERLACED) {
                        bt->height += (hdmi_read(sd, 0x0b) & 0x0f) * 256 +
                                        hdmi_read(sd, 0x0c);
                        bt->il_vfrontporch = ((hdmi_read(sd, 0x2c) & 0x1f) * 256 +
                                        hdmi_read(sd, 0x2d)) / 2;
                        bt->il_vsync = ((hdmi_read(sd, 0x30) & 0x1f) * 256 +
                                        hdmi_read(sd, 0x31)) / 2;
                        bt->vbackporch = ((hdmi_read(sd, 0x34) & 0x1f) * 256 +
                                        hdmi_read(sd, 0x35)) / 2;
                }
                adv7604_fill_optional_dv_timings_fields(sd, timings);
        } else {
                /* find format
                 * Since LCVS values are inaccurate [REF_03, p. 275-276],
                 * stdi2dv_timings() is called with lcvs +-1 if the first attempt fails.
                 */
                if (!stdi2dv_timings(sd, &stdi, timings))
                        goto found;
                stdi.lcvs += 1;
                v4l2_dbg(1, debug, sd, "%s: lcvs + 1 = %d\n", __func__, stdi.lcvs);
                if (!stdi2dv_timings(sd, &stdi, timings))
                        goto found;
                stdi.lcvs -= 2;
                v4l2_dbg(1, debug, sd, "%s: lcvs - 1 = %d\n", __func__, stdi.lcvs);
                if (stdi2dv_timings(sd, &stdi, timings)) {
                        /*
                         * The STDI block may measure wrong values, especially
                         * for lcvs and lcf. If the driver can not find any
                         * valid timing, the STDI block is restarted to measure
                         * the video timings again. The function will return an
                         * error, but the restart of STDI will generate a new
                         * STDI interrupt and the format detection process will
                         * restart.
                         */
                        if (state->restart_stdi_once) {
                                v4l2_dbg(1, debug, sd, "%s: restart STDI\n", __func__);
                                /* TODO restart STDI for Sync Channel 2 */
                                /* enter one-shot mode */
                                cp_write_and_or(sd, 0x86, 0xf9, 0x00);
                                /* trigger STDI restart */
                                cp_write_and_or(sd, 0x86, 0xf9, 0x04);
                                /* reset to continuous mode */
                                cp_write_and_or(sd, 0x86, 0xf9, 0x02);
                                state->restart_stdi_once = false;
                                return -ENOLINK;
                        }
                        v4l2_dbg(1, debug, sd, "%s: format not supported\n", __func__);
                        return -ERANGE;
                }
                state->restart_stdi_once = true;
        }
found:

        if (no_signal(sd)) {
                v4l2_dbg(1, debug, sd, "%s: signal lost during readout\n", __func__);
                memset(timings, 0, sizeof(struct v4l2_dv_timings));
                return -ENOLINK;
        }

        if ((!DIGITAL_INPUT && bt->pixelclock > 170000000) ||
                        (DIGITAL_INPUT && bt->pixelclock > 225000000)) {
                v4l2_dbg(1, debug, sd, "%s: pixelclock out of range %d\n",
                                __func__, (u32)bt->pixelclock);
                return -ERANGE;
        }

        if (debug > 1)
                v4l2_print_dv_timings(sd->name, "adv7604_query_dv_timings: ",
                                      timings, true);

        return 0;
}

static int adv7604_s_dv_timings(struct v4l2_subdev *sd,
                struct v4l2_dv_timings *timings)
{
        struct adv7604_state *state = to_state(sd);
        struct v4l2_bt_timings *bt;
        int err;

        if (!timings)
                return -EINVAL;

        bt = &timings->bt;

        if ((!DIGITAL_INPUT && bt->pixelclock > 170000000) ||
                        (DIGITAL_INPUT && bt->pixelclock > 225000000)) {
                v4l2_dbg(1, debug, sd, "%s: pixelclock out of range %d\n",
                                __func__, (u32)bt->pixelclock);
                return -ERANGE;
        }

        adv7604_fill_optional_dv_timings_fields(sd, timings);

        state->timings = *timings;

        cp_write(sd, 0x91, bt->interlaced ? 0x50 : 0x10);

        /* Use prim_mode and vid_std when available */
        err = configure_predefined_video_timings(sd, timings);
        if (err) {
                /* custom settings when the video format
                 does not have prim_mode/vid_std */
                configure_custom_video_timings(sd, bt);
        }

        set_rgb_quantization_range(sd);


        if (debug > 1)
                v4l2_print_dv_timings(sd->name, "adv7604_s_dv_timings: ",
                                      timings, true);
        return 0;
}

static int adv7604_g_dv_timings(struct v4l2_subdev *sd,
                struct v4l2_dv_timings *timings)
{
        struct adv7604_state *state = to_state(sd);

        *timings = state->timings;
        return 0;
}

static void enable_input(struct v4l2_subdev *sd)
{
        struct adv7604_state *state = to_state(sd);

        switch (state->mode) {
        case ADV7604_MODE_COMP:
        case ADV7604_MODE_GR:
                /* enable */
                io_write(sd, 0x15, 0xb0);   /* Disable Tristate of Pins (no audio) */
                break;
        case ADV7604_MODE_HDMI:
                /* enable */
                hdmi_write(sd, 0x1a, 0x0a); /* Unmute audio */
                hdmi_write(sd, 0x01, 0x00); /* Enable HDMI clock terminators */
                io_write(sd, 0x15, 0xa0);   /* Disable Tristate of Pins */
                break;
        default:
                v4l2_dbg(2, debug, sd, "%s: Unknown mode %d\n",
                                __func__, state->mode);
                break;
        }
}

static void disable_input(struct v4l2_subdev *sd)
{
        /* disable */
        io_write(sd, 0x15, 0xbe);   /* Tristate all outputs from video core */
        hdmi_write(sd, 0x1a, 0x1a); /* Mute audio */
        hdmi_write(sd, 0x01, 0x78); /* Disable HDMI clock terminators */
}

static void select_input(struct v4l2_subdev *sd)
{
        struct adv7604_state *state = to_state(sd);

        switch (state->mode) {
        case ADV7604_MODE_COMP:
        case ADV7604_MODE_GR:
                /* reset ADI recommended settings for HDMI: */
                /* "ADV7604 Register Settings Recommendations (rev. 2.5, June 2010)" p. 4. */
                hdmi_write(sd, 0x0d, 0x04); /* HDMI filter optimization */
                hdmi_write(sd, 0x3d, 0x00); /* DDC bus active pull-up control */
                hdmi_write(sd, 0x3e, 0x74); /* TMDS PLL optimization */
                hdmi_write(sd, 0x4e, 0x3b); /* TMDS PLL optimization */
                hdmi_write(sd, 0x57, 0x74); /* TMDS PLL optimization */
                hdmi_write(sd, 0x58, 0x63); /* TMDS PLL optimization */
                hdmi_write(sd, 0x8d, 0x18); /* equaliser */
                hdmi_write(sd, 0x8e, 0x34); /* equaliser */
                hdmi_write(sd, 0x93, 0x88); /* equaliser */
                hdmi_write(sd, 0x94, 0x2e); /* equaliser */
                hdmi_write(sd, 0x96, 0x00); /* enable automatic EQ changing */

                afe_write(sd, 0x00, 0x08); /* power up ADC */
                afe_write(sd, 0x01, 0x06); /* power up Analog Front End */
                afe_write(sd, 0xc8, 0x00); /* phase control */

                /* set ADI recommended settings for digitizer */
                /* "ADV7604 Register Settings Recommendations (rev. 2.5, June 2010)" p. 17. */
                afe_write(sd, 0x12, 0x7b); /* ADC noise shaping filter controls */
                afe_write(sd, 0x0c, 0x1f); /* CP core gain controls */
                cp_write(sd, 0x3e, 0x04); /* CP core pre-gain control */
                cp_write(sd, 0xc3, 0x39); /* CP coast control. Graphics mode */
                cp_write(sd, 0x40, 0x5c); /* CP core pre-gain control. Graphics mode */
                break;

        case ADV7604_MODE_HDMI:
                /* set ADI recommended settings for HDMI: */
                /* "ADV7604 Register Settings Recommendations (rev. 2.5, June 2010)" p. 4. */
                hdmi_write(sd, 0x0d, 0x84); /* HDMI filter optimization */
                hdmi_write(sd, 0x3d, 0x10); /* DDC bus active pull-up control */
                hdmi_write(sd, 0x3e, 0x39); /* TMDS PLL optimization */
                hdmi_write(sd, 0x4e, 0x3b); /* TMDS PLL optimization */
                hdmi_write(sd, 0x57, 0xb6); /* TMDS PLL optimization */
                hdmi_write(sd, 0x58, 0x03); /* TMDS PLL optimization */
                hdmi_write(sd, 0x8d, 0x18); /* equaliser */
                hdmi_write(sd, 0x8e, 0x34); /* equaliser */
                hdmi_write(sd, 0x93, 0x8b); /* equaliser */
                hdmi_write(sd, 0x94, 0x2d); /* equaliser */
                hdmi_write(sd, 0x96, 0x01); /* enable automatic EQ changing */

                afe_write(sd, 0x00, 0xff); /* power down ADC */
                afe_write(sd, 0x01, 0xfe); /* power down Analog Front End */
                afe_write(sd, 0xc8, 0x40); /* phase control */

                /* reset ADI recommended settings for digitizer */
                /* "ADV7604 Register Settings Recommendations (rev. 2.5, June 2010)" p. 17. */
                afe_write(sd, 0x12, 0xfb); /* ADC noise shaping filter controls */
                afe_write(sd, 0x0c, 0x0d); /* CP core gain controls */
                cp_write(sd, 0x3e, 0x00); /* CP core pre-gain control */
                cp_write(sd, 0xc3, 0x39); /* CP coast control. Graphics mode */
                cp_write(sd, 0x40, 0x80); /* CP core pre-gain control. Graphics mode */

                break;
        default:
                v4l2_dbg(2, debug, sd, "%s: Unknown mode %d\n",
                                __func__, state->mode);
                break;
        }
}

static int adv7604_s_routing(struct v4l2_subdev *sd,
                u32 input, u32 output, u32 config)
{
        struct adv7604_state *state = to_state(sd);

        v4l2_dbg(2, debug, sd, "%s: input %d", __func__, input);

        state->mode = input;

        disable_input(sd);

        select_input(sd);

        enable_input(sd);

        return 0;
}

static int adv7604_enum_mbus_fmt(struct v4l2_subdev *sd, unsigned int index,
                             enum v4l2_mbus_pixelcode *code)
{
        if (index)
                return -EINVAL;
        /* Good enough for now */
        *code = V4L2_MBUS_FMT_FIXED;
        return 0;
}

static int adv7604_g_mbus_fmt(struct v4l2_subdev *sd,
                struct v4l2_mbus_framefmt *fmt)
{
        struct adv7604_state *state = to_state(sd);

        fmt->width = state->timings.bt.width;
        fmt->height = state->timings.bt.height;
        fmt->code = V4L2_MBUS_FMT_FIXED;
        fmt->field = V4L2_FIELD_NONE;
        if (state->timings.bt.standards & V4L2_DV_BT_STD_CEA861) {
                fmt->colorspace = (state->timings.bt.height <= 576) ?
                        V4L2_COLORSPACE_SMPTE170M : V4L2_COLORSPACE_REC709;
        }
        return 0;
}

static int adv7604_isr(struct v4l2_subdev *sd, u32 status, bool *handled)
{
        struct adv7604_state *state = to_state(sd);
        u8 fmt_change, fmt_change_digital, tx_5v;
        u32 input_status;

        /* format change */
        fmt_change = io_read(sd, 0x43) & 0x98;
        if (fmt_change)
                io_write(sd, 0x44, fmt_change);
        fmt_change_digital = DIGITAL_INPUT ? (io_read(sd, 0x6b) & 0xc0) : 0;
        if (fmt_change_digital)
                io_write(sd, 0x6c, fmt_change_digital);
        if (fmt_change || fmt_change_digital) {
                v4l2_dbg(1, debug, sd,
                        "%s: fmt_change = 0x%x, fmt_change_digital = 0x%x\n",
                        __func__, fmt_change, fmt_change_digital);

                adv7604_g_input_status(sd, &input_status);
                if (input_status != state->prev_input_status) {
                        v4l2_dbg(1, debug, sd,
                                "%s: input_status = 0x%x, prev_input_status = 0x%x\n",
                                __func__, input_status, state->prev_input_status);
                        state->prev_input_status = input_status;
                        v4l2_subdev_notify(sd, ADV7604_FMT_CHANGE, NULL);
                }

                if (handled)
                        *handled = true;
        }
        /* tx 5v detect */
        tx_5v = io_read(sd, 0x70) & 0x10;
        if (tx_5v) {
                v4l2_dbg(1, debug, sd, "%s: tx_5v: 0x%x\n", __func__, tx_5v);
                io_write(sd, 0x71, tx_5v);
                adv7604_s_detect_tx_5v_ctrl(sd);
                if (handled)
                        *handled = true;
        }
        return 0;
}

static int adv7604_get_edid(struct v4l2_subdev *sd, struct v4l2_subdev_edid *edid)
{
        struct adv7604_state *state = to_state(sd);

        if (edid->pad != 0)
                return -EINVAL;
        if (edid->blocks == 0)
                return -EINVAL;
        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;
        if (!edid->edid)
                return -EINVAL;
        memcpy(edid->edid + edid->start_block * 128,
               state->edid + edid->start_block * 128,
               edid->blocks * 128);
        return 0;
}

static int adv7604_set_edid(struct v4l2_subdev *sd, struct v4l2_subdev_edid *edid)
{
        struct adv7604_state *state = to_state(sd);
        int err;

        if (edid->pad != 0)
                return -EINVAL;
        if (edid->start_block != 0)
                return -EINVAL;
        if (edid->blocks == 0) {
                /* Pull down the hotplug pin */
                v4l2_subdev_notify(sd, ADV7604_HOTPLUG, (void *)0);
                /* Disables I2C access to internal EDID ram from DDC port */
                rep_write_and_or(sd, 0x77, 0xf0, 0x0);
                state->edid_blocks = 0;
                /* Fall back to a 16:9 aspect ratio */
                state->aspect_ratio.numerator = 16;
                state->aspect_ratio.denominator = 9;
                return 0;
        }
        if (edid->blocks > 2)
                return -E2BIG;
        if (!edid->edid)
                return -EINVAL;
        memcpy(state->edid, edid->edid, 128 * edid->blocks);
        state->edid_blocks = edid->blocks;
        state->aspect_ratio = v4l2_calc_aspect_ratio(edid->edid[0x15],
                        edid->edid[0x16]);
        err = edid_write_block(sd, 128 * edid->blocks, state->edid);
        if (err < 0)
                v4l2_err(sd, "error %d writing edid\n", err);
        return err;
}

/*********** avi info frame CEA-861-E **************/

static void print_avi_infoframe(struct v4l2_subdev *sd)
{
        int i;
        u8 buf[14];
        u8 avi_len;
        u8 avi_ver;

        if (!is_hdmi(sd)) {
                v4l2_info(sd, "receive DVI-D signal (AVI infoframe not supported)\n");
                return;
        }
        if (!(io_read(sd, 0x60) & 0x01)) {
                v4l2_info(sd, "AVI infoframe not received\n");
                return;
        }

        if (io_read(sd, 0x83) & 0x01) {
                v4l2_info(sd, "AVI infoframe checksum error has occurred earlier\n");
                io_write(sd, 0x85, 0x01); /* clear AVI_INF_CKS_ERR_RAW */
                if (io_read(sd, 0x83) & 0x01) {
                        v4l2_info(sd, "AVI infoframe checksum error still present\n");
                        io_write(sd, 0x85, 0x01); /* clear AVI_INF_CKS_ERR_RAW */
                }
        }

        avi_len = infoframe_read(sd, 0xe2);
        avi_ver = infoframe_read(sd, 0xe1);
        v4l2_info(sd, "AVI infoframe version %d (%d byte)\n",
                        avi_ver, avi_len);

        if (avi_ver != 0x02)
                return;

        for (i = 0; i < 14; i++)
                buf[i] = infoframe_read(sd, i);

        v4l2_info(sd,
                "\t%02x %02x %02x %02x %02x %02x %02x %02x %02x %02x %02x %02x %02x %02x\n",
                buf[0], buf[1], buf[2], buf[3], buf[4], buf[5], buf[6], buf[7],
                buf[8], buf[9], buf[10], buf[11], buf[12], buf[13]);
}

static int adv7604_log_status(struct v4l2_subdev *sd)
{
        struct adv7604_state *state = to_state(sd);
        struct v4l2_dv_timings timings;
        struct stdi_readback stdi;
        u8 reg_io_0x02 = io_read(sd, 0x02);

        char *csc_coeff_sel_rb[16] = {
                "bypassed", "YPbPr601 -> RGB", "reserved", "YPbPr709 -> RGB",
                "reserved", "RGB -> YPbPr601", "reserved", "RGB -> YPbPr709",
                "reserved", "YPbPr709 -> YPbPr601", "YPbPr601 -> YPbPr709",
                "reserved", "reserved", "reserved", "reserved", "manual"
        };
        char *input_color_space_txt[16] = {
                "RGB limited range (16-235)", "RGB full range (0-255)",
                "YCbCr Bt.601 (16-235)", "YCbCr Bt.709 (16-235)",
                "XvYCC Bt.601", "XvYCC Bt.709",
                "YCbCr Bt.601 (0-255)", "YCbCr Bt.709 (0-255)",
                "invalid", "invalid", "invalid", "invalid", "invalid",
                "invalid", "invalid", "automatic"
        };
        char *rgb_quantization_range_txt[] = {
                "Automatic",
                "RGB limited range (16-235)",
                "RGB full range (0-255)",
        };
        char *deep_color_mode_txt[4] = {
                "8-bits per channel",
                "10-bits per channel",
                "12-bits per channel",
                "16-bits per channel (not supported)"
        };

        v4l2_info(sd, "-----Chip status-----\n");
        v4l2_info(sd, "Chip power: %s\n", no_power(sd) ? "off" : "on");
        v4l2_info(sd, "Connector type: %s\n", state->connector_hdmi ?
                        "HDMI" : (DIGITAL_INPUT ? "DVI-D" : "DVI-A"));
        v4l2_info(sd, "EDID: %s\n", ((rep_read(sd, 0x7d) & 0x01) &&
                        (rep_read(sd, 0x77) & 0x01)) ? "enabled" : "disabled ");
        v4l2_info(sd, "CEC: %s\n", !!(cec_read(sd, 0x2a) & 0x01) ?
                        "enabled" : "disabled");

        v4l2_info(sd, "-----Signal status-----\n");
        v4l2_info(sd, "Cable detected (+5V power): %s\n",
                        (io_read(sd, 0x6f) & 0x10) ? "true" : "false");
        v4l2_info(sd, "TMDS signal detected: %s\n",
                        no_signal_tmds(sd) ? "false" : "true");
        v4l2_info(sd, "TMDS signal locked: %s\n",
                        no_lock_tmds(sd) ? "false" : "true");
        v4l2_info(sd, "SSPD locked: %s\n", no_lock_sspd(sd) ? "false" : "true");
        v4l2_info(sd, "STDI locked: %s\n", no_lock_stdi(sd) ? "false" : "true");
        v4l2_info(sd, "CP locked: %s\n", no_lock_cp(sd) ? "false" : "true");
        v4l2_info(sd, "CP free run: %s\n",
                        (!!(cp_read(sd, 0xff) & 0x10) ? "on" : "off"));
        v4l2_info(sd, "Prim-mode = 0x%x, video std = 0x%x, v_freq = 0x%x\n",
                        io_read(sd, 0x01) & 0x0f, io_read(sd, 0x00) & 0x3f,
                        (io_read(sd, 0x01) & 0x70) >> 4);

        v4l2_info(sd, "-----Video Timings-----\n");
        if (read_stdi(sd, &stdi))
                v4l2_info(sd, "STDI: not locked\n");
        else
                v4l2_info(sd, "STDI: lcf (frame height - 1) = %d, bl = %d, lcvs (vsync) = %d, %s, %chsync, %cvsync\n",
                                stdi.lcf, stdi.bl, stdi.lcvs,
                                stdi.interlaced ? "interlaced" : "progressive",
                                stdi.hs_pol, stdi.vs_pol);
        if (adv7604_query_dv_timings(sd, &timings))
                v4l2_info(sd, "No video detected\n");
        else
                v4l2_print_dv_timings(sd->name, "Detected format: ",
                                      &timings, true);
        v4l2_print_dv_timings(sd->name, "Configured format: ",
                              &state->timings, true);

        if (no_signal(sd))
                return 0;

        v4l2_info(sd, "-----Color space-----\n");
        v4l2_info(sd, "RGB quantization range ctrl: %s\n",
                        rgb_quantization_range_txt[state->rgb_quantization_range]);
        v4l2_info(sd, "Input color space: %s\n",
                        input_color_space_txt[reg_io_0x02 >> 4]);
        v4l2_info(sd, "Output color space: %s %s, saturator %s\n",
                        (reg_io_0x02 & 0x02) ? "RGB" : "YCbCr",
                        (reg_io_0x02 & 0x04) ? "(16-235)" : "(0-255)",
                        ((reg_io_0x02 & 0x04) ^ (reg_io_0x02 & 0x01)) ?
                                "enabled" : "disabled");
        v4l2_info(sd, "Color space conversion: %s\n",
                        csc_coeff_sel_rb[cp_read(sd, 0xfc) >> 4]);

        if (!DIGITAL_INPUT)
                return 0;

        v4l2_info(sd, "-----%s status-----\n", is_hdmi(sd) ? "HDMI" : "DVI-D");
        v4l2_info(sd, "HDCP encrypted content: %s\n", (hdmi_read(sd, 0x05) & 0x40) ? "true" : "false");
        v4l2_info(sd, "HDCP keys read: %s%s\n",
                        (hdmi_read(sd, 0x04) & 0x20) ? "yes" : "no",
                        (hdmi_read(sd, 0x04) & 0x10) ? "ERROR" : "");
        if (!is_hdmi(sd)) {
                bool audio_pll_locked = hdmi_read(sd, 0x04) & 0x01;
                bool audio_sample_packet_detect = hdmi_read(sd, 0x18) & 0x01;
                bool audio_mute = io_read(sd, 0x65) & 0x40;

                v4l2_info(sd, "Audio: pll %s, samples %s, %s\n",
                                audio_pll_locked ? "locked" : "not locked",
                                audio_sample_packet_detect ? "detected" : "not detected",
                                audio_mute ? "muted" : "enabled");
                if (audio_pll_locked && audio_sample_packet_detect) {
                        v4l2_info(sd, "Audio format: %s\n",
                                        (hdmi_read(sd, 0x07) & 0x20) ? "multi-channel" : "stereo");
                }
                v4l2_info(sd, "Audio CTS: %u\n", (hdmi_read(sd, 0x5b) << 12) +
                                (hdmi_read(sd, 0x5c) << 8) +
                                (hdmi_read(sd, 0x5d) & 0xf0));
                v4l2_info(sd, "Audio N: %u\n", ((hdmi_read(sd, 0x5d) & 0x0f) << 16) +
                                (hdmi_read(sd, 0x5e) << 8) +
                                hdmi_read(sd, 0x5f));
                v4l2_info(sd, "AV Mute: %s\n", (hdmi_read(sd, 0x04) & 0x40) ? "on" : "off");

                v4l2_info(sd, "Deep color mode: %s\n", deep_color_mode_txt[(hdmi_read(sd, 0x0b) & 0x60) >> 5]);

                print_avi_infoframe(sd);
        }

        return 0;
}

/* ----------------------------------------------------------------------- */

static const struct v4l2_ctrl_ops adv7604_ctrl_ops = {
        .s_ctrl = adv7604_s_ctrl,
};

static const struct v4l2_subdev_core_ops adv7604_core_ops = {
        .log_status = adv7604_log_status,
        .g_ext_ctrls = v4l2_subdev_g_ext_ctrls,
        .try_ext_ctrls = v4l2_subdev_try_ext_ctrls,
        .s_ext_ctrls = v4l2_subdev_s_ext_ctrls,
        .g_ctrl = v4l2_subdev_g_ctrl,
        .s_ctrl = v4l2_subdev_s_ctrl,
        .queryctrl = v4l2_subdev_queryctrl,
        .querymenu = v4l2_subdev_querymenu,
        .interrupt_service_routine = adv7604_isr,
#ifdef CONFIG_VIDEO_ADV_DEBUG
        .g_register = adv7604_g_register,
        .s_register = adv7604_s_register,
#endif
};

static const struct v4l2_subdev_video_ops adv7604_video_ops = {
        .s_routing = adv7604_s_routing,
        .g_input_status = adv7604_g_input_status,
        .s_dv_timings = adv7604_s_dv_timings,
        .g_dv_timings = adv7604_g_dv_timings,
        .query_dv_timings = adv7604_query_dv_timings,
        .enum_dv_timings = adv7604_enum_dv_timings,
        .dv_timings_cap = adv7604_dv_timings_cap,
        .enum_mbus_fmt = adv7604_enum_mbus_fmt,
        .g_mbus_fmt = adv7604_g_mbus_fmt,
        .try_mbus_fmt = adv7604_g_mbus_fmt,
        .s_mbus_fmt = adv7604_g_mbus_fmt,
};

static const struct v4l2_subdev_pad_ops adv7604_pad_ops = {
        .get_edid = adv7604_get_edid,
        .set_edid = adv7604_set_edid,
};

static const struct v4l2_subdev_ops adv7604_ops = {
        .core = &adv7604_core_ops,
        .video = &adv7604_video_ops,
        .pad = &adv7604_pad_ops,
};

/* -------------------------- custom ctrls ---------------------------------- */

static const struct v4l2_ctrl_config adv7604_ctrl_analog_sampling_phase = {
        .ops = &adv7604_ctrl_ops,
        .id = V4L2_CID_ADV_RX_ANALOG_SAMPLING_PHASE,
        .name = "Analog Sampling Phase",
        .type = V4L2_CTRL_TYPE_INTEGER,
        .min = 0,
        .max = 0x1f,
        .step = 1,
        .def = 0,
};

static const struct v4l2_ctrl_config adv7604_ctrl_free_run_color_manual = {
        .ops = &adv7604_ctrl_ops,
        .id = V4L2_CID_ADV_RX_FREE_RUN_COLOR_MANUAL,
        .name = "Free Running Color, Manual",
        .type = V4L2_CTRL_TYPE_BOOLEAN,
        .min = false,
        .max = true,
        .step = 1,
        .def = false,
};

static const struct v4l2_ctrl_config adv7604_ctrl_free_run_color = {
        .ops = &adv7604_ctrl_ops,
        .id = V4L2_CID_ADV_RX_FREE_RUN_COLOR,
        .name = "Free Running Color",
        .type = V4L2_CTRL_TYPE_INTEGER,
        .min = 0x0,
        .max = 0xffffff,
        .step = 0x1,
        .def = 0x0,
};

/* ----------------------------------------------------------------------- */

static int adv7604_core_init(struct v4l2_subdev *sd)
{
        struct adv7604_state *state = to_state(sd);
        struct adv7604_platform_data *pdata = &state->pdata;

        hdmi_write(sd, 0x48,
                (pdata->disable_pwrdnb ? 0x80 : 0) |
                (pdata->disable_cable_det_rst ? 0x40 : 0));

        disable_input(sd);

        /* power */
        io_write(sd, 0x0c, 0x42);   /* Power up part and power down VDP */
        io_write(sd, 0x0b, 0x44);   /* Power down ESDP block */
        cp_write(sd, 0xcf, 0x01);   /* Power down macrovision */

        /* video format */
        io_write_and_or(sd, 0x02, 0xf0,
                        pdata->alt_gamma << 3 |
                        pdata->op_656_range << 2 |
                        pdata->rgb_out << 1 |
                        pdata->alt_data_sat << 0);
        io_write(sd, 0x03, pdata->op_format_sel);
        io_write_and_or(sd, 0x04, 0x1f, pdata->op_ch_sel << 5);
        io_write_and_or(sd, 0x05, 0xf0, pdata->blank_data << 3 |
                                        pdata->insert_av_codes << 2 |
                                        pdata->replicate_av_codes << 1 |
                                        pdata->invert_cbcr << 0);

        /* TODO from platform data */
        cp_write(sd, 0x69, 0x30);   /* Enable CP CSC */
        io_write(sd, 0x06, 0xa6);   /* positive VS and HS */
        io_write(sd, 0x14, 0x7f);   /* Drive strength adjusted to max */
        cp_write(sd, 0xba, (pdata->hdmi_free_run_mode << 1) | 0x01); /* HDMI free run */
        cp_write(sd, 0xf3, 0xdc); /* Low threshold to enter/exit free run mode */
        cp_write(sd, 0xf9, 0x23); /*  STDI ch. 1 - LCVS change threshold -
                                      ADI recommended setting [REF_01, c. 2.3.3] */
        cp_write(sd, 0x45, 0x23); /*  STDI ch. 2 - LCVS change threshold -
                                      ADI recommended setting [REF_01, c. 2.3.3] */
        cp_write(sd, 0xc9, 0x2d); /* use prim_mode and vid_std as free run resolution
                                     for digital formats */

        /* TODO from platform data */
        afe_write(sd, 0xb5, 0x01);  /* Setting MCLK to 256Fs */

        afe_write(sd, 0x02, pdata->ain_sel); /* Select analog input muxing mode */
        io_write_and_or(sd, 0x30, ~(1 << 4), pdata->output_bus_lsb_to_msb << 4);

        /* interrupts */
        io_write(sd, 0x40, 0xc2); /* Configure INT1 */
        io_write(sd, 0x41, 0xd7); /* STDI irq for any change, disable INT2 */
        io_write(sd, 0x46, 0x98); /* Enable SSPD, STDI and CP unlocked interrupts */
        io_write(sd, 0x6e, 0xc0); /* Enable V_LOCKED and DE_REGEN_LCK interrupts */
        io_write(sd, 0x73, 0x10); /* Enable CABLE_DET_A_ST (+5v) interrupt */

        return v4l2_ctrl_handler_setup(sd->ctrl_handler);
}

static void adv7604_unregister_clients(struct adv7604_state *state)
{
        if (state->i2c_avlink)
                i2c_unregister_device(state->i2c_avlink);
        if (state->i2c_cec)
                i2c_unregister_device(state->i2c_cec);
        if (state->i2c_infoframe)
                i2c_unregister_device(state->i2c_infoframe);
        if (state->i2c_esdp)
                i2c_unregister_device(state->i2c_esdp);
        if (state->i2c_dpp)
                i2c_unregister_device(state->i2c_dpp);
        if (state->i2c_afe)
                i2c_unregister_device(state->i2c_afe);
        if (state->i2c_repeater)
                i2c_unregister_device(state->i2c_repeater);
        if (state->i2c_edid)
                i2c_unregister_device(state->i2c_edid);
        if (state->i2c_hdmi)
                i2c_unregister_device(state->i2c_hdmi);
        if (state->i2c_test)
                i2c_unregister_device(state->i2c_test);
        if (state->i2c_cp)
                i2c_unregister_device(state->i2c_cp);
        if (state->i2c_vdp)
                i2c_unregister_device(state->i2c_vdp);
}

static struct i2c_client *adv7604_dummy_client(struct v4l2_subdev *sd,
                                                        u8 addr, u8 io_reg)
{
        struct i2c_client *client = v4l2_get_subdevdata(sd);

        if (addr)
                io_write(sd, io_reg, addr << 1);
        return i2c_new_dummy(client->adapter, io_read(sd, io_reg) >> 1);
}

static int adv7604_probe(struct i2c_client *client,
                         const struct i2c_device_id *id)
{
        struct adv7604_state *state;
        struct adv7604_platform_data *pdata = client->dev.platform_data;
        struct v4l2_ctrl_handler *hdl;
        struct v4l2_subdev *sd;
        int err;

        /* Check if the adapter supports the needed features */
        if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA))
                return -EIO;
        v4l_dbg(1, debug, client, "detecting adv7604 client on address 0x%x\n",
                        client->addr << 1);

        state = devm_kzalloc(&client->dev, sizeof(*state), GFP_KERNEL);
        if (!state) {
                v4l_err(client, "Could not allocate adv7604_state memory!\n");
                return -ENOMEM;
        }

        /* initialize variables */
        state->restart_stdi_once = true;
        state->prev_input_status = ~0;

        /* platform data */
        if (!pdata) {
                v4l_err(client, "No platform data!\n");
                return -ENODEV;
        }
        memcpy(&state->pdata, pdata, sizeof(state->pdata));

        sd = &state->sd;
        v4l2_i2c_subdev_init(sd, client, &adv7604_ops);
        sd->flags |= V4L2_SUBDEV_FL_HAS_DEVNODE;
        state->connector_hdmi = pdata->connector_hdmi;

        /* i2c access to adv7604? */
        if (adv_smbus_read_byte_data_check(client, 0xfb, false) != 0x68) {
                v4l2_info(sd, "not an adv7604 on address 0x%x\n",
                                client->addr << 1);
                return -ENODEV;
        }

        /* control handlers */
        hdl = &state->hdl;
        v4l2_ctrl_handler_init(hdl, 9);

        v4l2_ctrl_new_std(hdl, &adv7604_ctrl_ops,
                        V4L2_CID_BRIGHTNESS, -128, 127, 1, 0);
        v4l2_ctrl_new_std(hdl, &adv7604_ctrl_ops,
                        V4L2_CID_CONTRAST, 0, 255, 1, 128);
        v4l2_ctrl_new_std(hdl, &adv7604_ctrl_ops,
                        V4L2_CID_SATURATION, 0, 255, 1, 128);
        v4l2_ctrl_new_std(hdl, &adv7604_ctrl_ops,
                        V4L2_CID_HUE, 0, 128, 1, 0);

        /* private 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, &adv7604_ctrl_ops,
                        V4L2_CID_DV_RX_RGB_RANGE, V4L2_DV_RGB_RANGE_FULL,
                        0, V4L2_DV_RGB_RANGE_AUTO);

        /* custom controls */
        state->analog_sampling_phase_ctrl =
                v4l2_ctrl_new_custom(hdl, &adv7604_ctrl_analog_sampling_phase, NULL);
        state->free_run_color_manual_ctrl =
                v4l2_ctrl_new_custom(hdl, &adv7604_ctrl_free_run_color_manual, NULL);
        state->free_run_color_ctrl =
                v4l2_ctrl_new_custom(hdl, &adv7604_ctrl_free_run_color, NULL);

        sd->ctrl_handler = hdl;
        if (hdl->error) {
                err = hdl->error;
                goto err_hdl;
        }
        state->detect_tx_5v_ctrl->is_private = true;
        state->rgb_quantization_range_ctrl->is_private = true;
        state->analog_sampling_phase_ctrl->is_private = true;
        state->free_run_color_manual_ctrl->is_private = true;
        state->free_run_color_ctrl->is_private = true;

        if (adv7604_s_detect_tx_5v_ctrl(sd)) {
                err = -ENODEV;
                goto err_hdl;
        }

        state->i2c_avlink = adv7604_dummy_client(sd, pdata->i2c_avlink, 0xf3);
        state->i2c_cec = adv7604_dummy_client(sd, pdata->i2c_cec, 0xf4);
        state->i2c_infoframe = adv7604_dummy_client(sd, pdata->i2c_infoframe, 0xf5);
        state->i2c_esdp = adv7604_dummy_client(sd, pdata->i2c_esdp, 0xf6);
        state->i2c_dpp = adv7604_dummy_client(sd, pdata->i2c_dpp, 0xf7);
        state->i2c_afe = adv7604_dummy_client(sd, pdata->i2c_afe, 0xf8);
        state->i2c_repeater = adv7604_dummy_client(sd, pdata->i2c_repeater, 0xf9);
        state->i2c_edid = adv7604_dummy_client(sd, pdata->i2c_edid, 0xfa);
        state->i2c_hdmi = adv7604_dummy_client(sd, pdata->i2c_hdmi, 0xfb);
        state->i2c_test = adv7604_dummy_client(sd, pdata->i2c_test, 0xfc);
        state->i2c_cp = adv7604_dummy_client(sd, pdata->i2c_cp, 0xfd);
        state->i2c_vdp = adv7604_dummy_client(sd, pdata->i2c_vdp, 0xfe);
        if (!state->i2c_avlink || !state->i2c_cec || !state->i2c_infoframe ||
            !state->i2c_esdp || !state->i2c_dpp || !state->i2c_afe ||
            !state->i2c_repeater || !state->i2c_edid || !state->i2c_hdmi ||
            !state->i2c_test || !state->i2c_cp || !state->i2c_vdp) {
                err = -ENOMEM;
                v4l2_err(sd, "failed to create all i2c clients\n");
                goto err_i2c;
        }

        /* work queues */
        state->work_queues = create_singlethread_workqueue(client->name);
        if (!state->work_queues) {
                v4l2_err(sd, "Could not create work queue\n");
                err = -ENOMEM;
                goto err_i2c;
        }

        INIT_DELAYED_WORK(&state->delayed_work_enable_hotplug,
                        adv7604_delayed_work_enable_hotplug);

        state->pad.flags = MEDIA_PAD_FL_SOURCE;
        err = media_entity_init(&sd->entity, 1, &state->pad, 0);
        if (err)
                goto err_work_queues;

        err = adv7604_core_init(sd);
        if (err)
                goto err_entity;
        v4l2_info(sd, "%s found @ 0x%x (%s)\n", client->name,
                        client->addr << 1, client->adapter->name);
        return 0;

err_entity:
        media_entity_cleanup(&sd->entity);
err_work_queues:
        cancel_delayed_work(&state->delayed_work_enable_hotplug);
        destroy_workqueue(state->work_queues);
err_i2c:
        adv7604_unregister_clients(state);
err_hdl:
        v4l2_ctrl_handler_free(hdl);
        return err;
}

/* ----------------------------------------------------------------------- */

static int adv7604_remove(struct i2c_client *client)
{
        struct v4l2_subdev *sd = i2c_get_clientdata(client);
        struct adv7604_state *state = to_state(sd);

        cancel_delayed_work(&state->delayed_work_enable_hotplug);
        destroy_workqueue(state->work_queues);
        v4l2_device_unregister_subdev(sd);
        media_entity_cleanup(&sd->entity);
        adv7604_unregister_clients(to_state(sd));
        v4l2_ctrl_handler_free(sd->ctrl_handler);
        return 0;
}

/* ----------------------------------------------------------------------- */

static struct i2c_device_id adv7604_id[] = {
        { "adv7604", 0 },
        { }
};
MODULE_DEVICE_TABLE(i2c, adv7604_id);

static struct i2c_driver adv7604_driver = {
        .driver = {
                .owner = THIS_MODULE,
                .name = "adv7604",
        },
        .probe = adv7604_probe,
        .remove = adv7604_remove,
        .id_table = adv7604_id,
};

module_i2c_driver(adv7604_driver);