/*
 * 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 (!v4l_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;
}

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

static void adv7604_print_timings(struct v4l2_subdev *sd,
				  struct v4l2_dv_timings *timings,
				  const char *txt, bool detailed)
{
	struct v4l2_bt_timings *bt = &timings->bt;
	u32 htot, vtot;

	if (timings->type != V4L2_DV_BT_656_1120)
		return;

	htot = htotal(bt);
	vtot = vtotal(bt);

	v4l2_info(sd, "%s %dx%d%s%d (%dx%d)",
			txt, bt->width, bt->height, bt->interlaced ? "i" : "p",
			(htot * vtot) > 0 ? ((u32)bt->pixelclock /
				(htot * vtot)) : 0,
			htot, vtot);

	if (!detailed)
		return;

	v4l2_info(sd, "    horizontal: fp = %d, %ssync = %d, bp = %d\n",
			bt->hfrontporch,
			(bt->polarities & V4L2_DV_HSYNC_POS_POL) ? "+" : "-",
			bt->hsync, bt->hbackporch);
	v4l2_info(sd, "    vertical: fp = %d, %ssync = %d, bp = %d\n",
			bt->vfrontporch,
			(bt->polarities & V4L2_DV_VSYNC_POS_POL) ? "+" : "-",
			bt->vsync, bt->vbackporch);
	v4l2_info(sd, "    pixelclock: %lld\n", bt->pixelclock);
	v4l2_info(sd, "    flags (0x%x):%s%s%s%s\n", bt->flags,
			(bt->flags & V4L2_DV_FL_REDUCED_BLANKING) ?
			" Reduced blanking," : "",
			(bt->flags & V4L2_DV_FL_CAN_REDUCE_FPS) ?
			" Can reduce FPS," : "",
			(bt->flags & V4L2_DV_FL_REDUCED_FPS) ?
			" Reduced FPS," : "",
			(bt->flags & V4L2_DV_FL_HALF_LINE) ?
			" Half line," : "");
	v4l2_info(sd, "    standards (0x%x):%s%s%s%s\n", bt->standards,
			(bt->standards & V4L2_DV_BT_STD_CEA861) ?  " CEA," : "",
			(bt->standards & V4L2_DV_BT_STD_DMT) ?  " DMT," : "",
			(bt->standards & V4L2_DV_BT_STD_CVT) ?  " CVT" : "",
			(bt->standards & V4L2_DV_BT_STD_GTF) ?  " GTF" : "");
}

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 = 27000000;
	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 (v4l_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)
		adv7604_print_timings(sd, timings,
				"adv7604_query_dv_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)
		adv7604_print_timings(sd, timings,
				"adv7604_s_dv_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
		adv7604_print_timings(sd, &timings, "Detected format:", true);
	adv7604_print_timings(sd, &state->timings, "Configured format:", 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->detect_tx_5v_ctrl->is_private = true;
	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);
	state->rgb_quantization_range_ctrl->is_private = true;

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

	sd->ctrl_handler = hdl;
	if (hdl->error) {
		err = hdl->error;
		goto err_hdl;
	}
	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);