text: // SPDX-License-Identifier: GPL-2.0-only
  /*
   * adv7604 - Analog Devices ADV7604 video decoder driver
   *
   * Copyright 2012 Cisco Systems, Inc. and/or its affiliates. All rights reserved.
   *
   */
  
  /*
   * 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/delay.h>
  #include <linux/gpio/consumer.h>
  #include <linux/hdmi.h>
  #include <linux/i2c.h>
  #include <linux/kernel.h>
  #include <linux/module.h>
  #include <linux/of_graph.h>
  #include <linux/slab.h>
  #include <linux/v4l2-dv-timings.h>
  #include <linux/videodev2.h>
  #include <linux/workqueue.h>
  #include <linux/regmap.h>
  
  #include <media/i2c/adv7604.h>
  #include <media/cec.h>
  #include <media/v4l2-ctrls.h>
  #include <media/v4l2-device.h>
  #include <media/v4l2-event.h>
  #include <media/v4l2-dv-timings.h>
  #include <media/v4l2-fwnode.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 ADV76XX_FSC (28636360)
  
  #define ADV76XX_RGB_OUT					(1 << 1)
  
  #define ADV76XX_OP_FORMAT_SEL_8BIT			(0 << 0)
  #define ADV7604_OP_FORMAT_SEL_10BIT			(1 << 0)
  #define ADV76XX_OP_FORMAT_SEL_12BIT			(2 << 0)
  
  #define ADV76XX_OP_MODE_SEL_SDR_422			(0 << 5)
  #define ADV7604_OP_MODE_SEL_DDR_422			(1 << 5)
  #define ADV76XX_OP_MODE_SEL_SDR_444			(2 << 5)
  #define ADV7604_OP_MODE_SEL_DDR_444			(3 << 5)
  #define ADV76XX_OP_MODE_SEL_SDR_422_2X			(4 << 5)
  #define ADV7604_OP_MODE_SEL_ADI_CM			(5 << 5)
  
  #define ADV76XX_OP_CH_SEL_GBR				(0 << 5)
  #define ADV76XX_OP_CH_SEL_GRB				(1 << 5)
  #define ADV76XX_OP_CH_SEL_BGR				(2 << 5)
  #define ADV76XX_OP_CH_SEL_RGB				(3 << 5)
  #define ADV76XX_OP_CH_SEL_BRG				(4 << 5)
  #define ADV76XX_OP_CH_SEL_RBG				(5 << 5)
  
  #define ADV76XX_OP_SWAP_CB_CR				(1 << 0)
  
  #define ADV76XX_MAX_ADDRS (3)
  
  enum adv76xx_type {
  	ADV7604,
  	ADV7611,
  	ADV7612,
  };
  
  struct adv76xx_reg_seq {
  	unsigned int reg;
  	u8 val;
  };
  
  struct adv76xx_format_info {
  	u32 code;
  	u8 op_ch_sel;
  	bool rgb_out;
  	bool swap_cb_cr;
  	u8 op_format_sel;
  };
  
  struct adv76xx_cfg_read_infoframe {
  	const char *desc;
  	u8 present_mask;
  	u8 head_addr;
  	u8 payload_addr;
  };
  
  struct adv76xx_chip_info {
  	enum adv76xx_type type;
  
  	bool has_afe;
  	unsigned int max_port;
  	unsigned int num_dv_ports;
  
  	unsigned int edid_enable_reg;
  	unsigned int edid_status_reg;
  	unsigned int lcf_reg;
  
  	unsigned int cable_det_mask;
  	unsigned int tdms_lock_mask;
  	unsigned int fmt_change_digital_mask;
  	unsigned int cp_csc;
  
  	const struct adv76xx_format_info *formats;
  	unsigned int nformats;
  
  	void (*set_termination)(struct v4l2_subdev *sd, bool enable);
  	void (*setup_irqs)(struct v4l2_subdev *sd);
  	unsigned int (*read_hdmi_pixelclock)(struct v4l2_subdev *sd);
  	unsigned int (*read_cable_det)(struct v4l2_subdev *sd);
  
  	/* 0 = AFE, 1 = HDMI */
  	const struct adv76xx_reg_seq *recommended_settings[2];
  	unsigned int num_recommended_settings[2];
  
  	unsigned long page_mask;
  
  	/* Masks for timings */
  	unsigned int linewidth_mask;
  	unsigned int field0_height_mask;
  	unsigned int field1_height_mask;
  	unsigned int hfrontporch_mask;
  	unsigned int hsync_mask;
  	unsigned int hbackporch_mask;
  	unsigned int field0_vfrontporch_mask;
  	unsigned int field1_vfrontporch_mask;
  	unsigned int field0_vsync_mask;
  	unsigned int field1_vsync_mask;
  	unsigned int field0_vbackporch_mask;
  	unsigned int field1_vbackporch_mask;
  };
  
  /*
   **********************************************************************
   *
   *  Arrays with configuration parameters for the ADV7604
   *
   **********************************************************************
   */
  
  struct adv76xx_state {
  	const struct adv76xx_chip_info *info;
  	struct adv76xx_platform_data pdata;
  
  	struct gpio_desc *hpd_gpio[4];
  	struct gpio_desc *reset_gpio;
  
  	struct v4l2_subdev sd;
  	struct media_pad pads[ADV76XX_PAD_MAX];
  	unsigned int source_pad;
  
  	struct v4l2_ctrl_handler hdl;
  
  	enum adv76xx_pad selected_input;
  
  	struct v4l2_dv_timings timings;
  	const struct adv76xx_format_info *format;
  
  	struct {
  		u8 edid[256];
  		u32 present;
  		unsigned blocks;
  	} edid;
  	u16 spa_port_a[2];
  	struct v4l2_fract aspect_ratio;
  	u32 rgb_quantization_range;
  	struct delayed_work delayed_work_enable_hotplug;
  	bool restart_stdi_once;
  
  	/* CEC */
  	struct cec_adapter *cec_adap;
  	u8   cec_addr[ADV76XX_MAX_ADDRS];
  	u8   cec_valid_addrs;
  	bool cec_enabled_adap;
  
  	/* i2c clients */
  	struct i2c_client *i2c_clients[ADV76XX_PAGE_MAX];
  
  	/* Regmaps */
  	struct regmap *regmap[ADV76XX_PAGE_MAX];
  
  	/* 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;
  };
  
  static bool adv76xx_has_afe(struct adv76xx_state *state)
  {
  	return state->info->has_afe;
  }
  
  /* Unsupported timings. This device cannot support 720p30. */
  static const struct v4l2_dv_timings adv76xx_timings_exceptions[] = {
  	V4L2_DV_BT_CEA_1280X720P30,
  	{ }
  };
  
  static bool adv76xx_check_dv_timings(const struct v4l2_dv_timings *t, void *hdl)
  {
  	int i;
  
  	for (i = 0; adv76xx_timings_exceptions[i].bt.width; i++)
  		if (v4l2_match_dv_timings(t, adv76xx_timings_exceptions + i, 0, false))
  			return false;
  	return true;
  }
  
  struct adv76xx_video_standards {
  	struct v4l2_dv_timings timings;
  	u8 vid_std;
  	u8 v_freq;
  };
  
  /* sorted by number of lines */
  static const struct adv76xx_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 adv76xx_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 adv76xx_video_standards adv76xx_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 adv76xx_video_standards adv76xx_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 const struct v4l2_event adv76xx_ev_fmt = {
  	.type = V4L2_EVENT_SOURCE_CHANGE,
  	.u.src_change.changes = V4L2_EVENT_SRC_CH_RESOLUTION,
  };
  
  /* ----------------------------------------------------------------------- */
  
  static inline struct adv76xx_state *to_state(struct v4l2_subdev *sd)
  {
  	return container_of(sd, struct adv76xx_state, sd);
  }
  
  static inline unsigned htotal(const struct v4l2_bt_timings *t)
  {
  	return V4L2_DV_BT_FRAME_WIDTH(t);
  }
  
  static inline unsigned vtotal(const struct v4l2_bt_timings *t)
  {
  	return V4L2_DV_BT_FRAME_HEIGHT(t);
  }
  
  /* ----------------------------------------------------------------------- */
  
  static int adv76xx_read_check(struct adv76xx_state *state,
  			     int client_page, u8 reg)
  {
  	struct i2c_client *client = state->i2c_clients[client_page];
  	int err;
  	unsigned int val;
  
  	err = regmap_read(state->regmap[client_page], reg, &val);
  
  	if (err) {
  		v4l_err(client, "error reading %02x, %02x\n",
  				client->addr, reg);
  		return err;
  	}
  	return val;
  }
  
  /* adv76xx_write_block(): Write raw data with a maximum of I2C_SMBUS_BLOCK_MAX
   * size to one or more registers.
   *
   * A value of zero will be returned on success, a negative errno will
   * be returned in error cases.
   */
  static int adv76xx_write_block(struct adv76xx_state *state, int client_page,
  			      unsigned int init_reg, const void *val,
  			      size_t val_len)
  {
  	struct regmap *regmap = state->regmap[client_page];
  
  	if (val_len > I2C_SMBUS_BLOCK_MAX)
  		val_len = I2C_SMBUS_BLOCK_MAX;
  
  	return regmap_raw_write(regmap, init_reg, val, val_len);
  }
  
  /* ----------------------------------------------------------------------- */
  
  static inline int io_read(struct v4l2_subdev *sd, u8 reg)
  {
  	struct adv76xx_state *state = to_state(sd);
  
  	return adv76xx_read_check(state, ADV76XX_PAGE_IO, reg);
  }
  
  static inline int io_write(struct v4l2_subdev *sd, u8 reg, u8 val)
  {
  	struct adv76xx_state *state = to_state(sd);
  
  	return regmap_write(state->regmap[ADV76XX_PAGE_IO], reg, val);
  }
  
  static inline int io_write_clr_set(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 adv76xx_state *state = to_state(sd);
  
  	return adv76xx_read_check(state, ADV7604_PAGE_AVLINK, reg);
  }
  
  static inline int avlink_write(struct v4l2_subdev *sd, u8 reg, u8 val)
  {
  	struct adv76xx_state *state = to_state(sd);
  
  	return regmap_write(state->regmap[ADV7604_PAGE_AVLINK], reg, val);
  }
  
  static inline int cec_read(struct v4l2_subdev *sd, u8 reg)
  {
  	struct adv76xx_state *state = to_state(sd);
  
  	return adv76xx_read_check(state, ADV76XX_PAGE_CEC, reg);
  }
  
  static inline int cec_write(struct v4l2_subdev *sd, u8 reg, u8 val)
  {
  	struct adv76xx_state *state = to_state(sd);
  
  	return regmap_write(state->regmap[ADV76XX_PAGE_CEC], reg, val);
  }
  
  static inline int cec_write_clr_set(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 adv76xx_state *state = to_state(sd);
  
  	return adv76xx_read_check(state, ADV76XX_PAGE_INFOFRAME, reg);
  }
  
  static inline int infoframe_write(struct v4l2_subdev *sd, u8 reg, u8 val)
  {
  	struct adv76xx_state *state = to_state(sd);
  
  	return regmap_write(state->regmap[ADV76XX_PAGE_INFOFRAME], reg, val);
  }
  
  static inline int afe_read(struct v4l2_subdev *sd, u8 reg)
  {
  	struct adv76xx_state *state = to_state(sd);
  
  	return adv76xx_read_check(state, ADV76XX_PAGE_AFE, reg);
  }
  
  static inline int afe_write(struct v4l2_subdev *sd, u8 reg, u8 val)
  {
  	struct adv76xx_state *state = to_state(sd);
  
  	return regmap_write(state->regmap[ADV76XX_PAGE_AFE], reg, val);
  }
  
  static inline int rep_read(struct v4l2_subdev *sd, u8 reg)
  {
  	struct adv76xx_state *state = to_state(sd);
  
  	return adv76xx_read_check(state, ADV76XX_PAGE_REP, reg);
  }
  
  static inline int rep_write(struct v4l2_subdev *sd, u8 reg, u8 val)
  {
  	struct adv76xx_state *state = to_state(sd);
  
  	return regmap_write(state->regmap[ADV76XX_PAGE_REP], reg, val);
  }
  
  static inline int rep_write_clr_set(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 adv76xx_state *state = to_state(sd);
  
  	return adv76xx_read_check(state, ADV76XX_PAGE_EDID, reg);
  }
  
  static inline int edid_write(struct v4l2_subdev *sd, u8 reg, u8 val)
  {
  	struct adv76xx_state *state = to_state(sd);
  
  	return regmap_write(state->regmap[ADV76XX_PAGE_EDID], reg, val);
  }
  
  static inline int edid_write_block(struct v4l2_subdev *sd,
  					unsigned int total_len, const u8 *val)
  {
  	struct adv76xx_state *state = to_state(sd);
  	int err = 0;
  	int i = 0;
  	int len = 0;
  
  	v4l2_dbg(2, debug, sd, "%s: write EDID block (%d byte)\n",
  				__func__, total_len);
  
  	while (!err && i < total_len) {
  		len = (total_len - i) > I2C_SMBUS_BLOCK_MAX ?
  				I2C_SMBUS_BLOCK_MAX :
  				(total_len - i);
  
  		err = adv76xx_write_block(state, ADV76XX_PAGE_EDID,
  				i, val + i, len);
  		i += len;
  	}
  
  	return err;
  }
  
  static void adv76xx_set_hpd(struct adv76xx_state *state, unsigned int hpd)
  {
  	unsigned int i;
  
  	for (i = 0; i < state->info->num_dv_ports; ++i)
  		gpiod_set_value_cansleep(state->hpd_gpio[i], hpd & BIT(i));
  
  	v4l2_subdev_notify(&state->sd, ADV76XX_HOTPLUG, &hpd);
  }
  
  static void adv76xx_delayed_work_enable_hotplug(struct work_struct *work)
  {
  	struct delayed_work *dwork = to_delayed_work(work);
  	struct adv76xx_state *state = container_of(dwork, struct adv76xx_state,
  						delayed_work_enable_hotplug);
  	struct v4l2_subdev *sd = &state->sd;
  
  	v4l2_dbg(2, debug, sd, "%s: enable hotplug\n", __func__);
  
  	adv76xx_set_hpd(state, state->edid.present);
  }
  
  static inline int hdmi_read(struct v4l2_subdev *sd, u8 reg)
  {
  	struct adv76xx_state *state = to_state(sd);
  
  	return adv76xx_read_check(state, ADV76XX_PAGE_HDMI, reg);
  }
  
  static u16 hdmi_read16(struct v4l2_subdev *sd, u8 reg, u16 mask)
  {
  	return ((hdmi_read(sd, reg) << 8) | hdmi_read(sd, reg + 1)) & mask;
  }
  
  static inline int hdmi_write(struct v4l2_subdev *sd, u8 reg, u8 val)
  {
  	struct adv76xx_state *state = to_state(sd);
  
  	return regmap_write(state->regmap[ADV76XX_PAGE_HDMI], reg, val);
  }
  
  static inline int hdmi_write_clr_set(struct v4l2_subdev *sd, u8 reg, u8 mask, u8 val)
  {
  	return hdmi_write(sd, reg, (hdmi_read(sd, reg) & ~mask) | val);
  }
  
  static inline int test_write(struct v4l2_subdev *sd, u8 reg, u8 val)
  {
  	struct adv76xx_state *state = to_state(sd);
  
  	return regmap_write(state->regmap[ADV76XX_PAGE_TEST], reg, val);
  }
  
  static inline int cp_read(struct v4l2_subdev *sd, u8 reg)
  {
  	struct adv76xx_state *state = to_state(sd);
  
  	return adv76xx_read_check(state, ADV76XX_PAGE_CP, reg);
  }
  
  static u16 cp_read16(struct v4l2_subdev *sd, u8 reg, u16 mask)
  {
  	return ((cp_read(sd, reg) << 8) | cp_read(sd, reg + 1)) & mask;
  }
  
  static inline int cp_write(struct v4l2_subdev *sd, u8 reg, u8 val)
  {
  	struct adv76xx_state *state = to_state(sd);
  
  	return regmap_write(state->regmap[ADV76XX_PAGE_CP], reg, val);
  }
  
  static inline int cp_write_clr_set(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 adv76xx_state *state = to_state(sd);
  
  	return adv76xx_read_check(state, ADV7604_PAGE_VDP, reg);
  }
  
  static inline int vdp_write(struct v4l2_subdev *sd, u8 reg, u8 val)
  {
  	struct adv76xx_state *state = to_state(sd);
  
  	return regmap_write(state->regmap[ADV7604_PAGE_VDP], reg, val);
  }
  
  #define ADV76XX_REG(page, offset)	(((page) << 8) | (offset))
  #define ADV76XX_REG_SEQ_TERM		0xffff
  
  #ifdef CONFIG_VIDEO_ADV_DEBUG
  static int adv76xx_read_reg(struct v4l2_subdev *sd, unsigned int reg)
  {
  	struct adv76xx_state *state = to_state(sd);
  	unsigned int page = reg >> 8;
  	unsigned int val;
  	int err;
  
  	if (page >= ADV76XX_PAGE_MAX || !(BIT(page) & state->info->page_mask))
  		return -EINVAL;
  
  	reg &= 0xff;
  	err = regmap_read(state->regmap[page], reg, &val);
  
  	return err ? err : val;
  }
  #endif
  
  static int adv76xx_write_reg(struct v4l2_subdev *sd, unsigned int reg, u8 val)
  {
  	struct adv76xx_state *state = to_state(sd);
  	unsigned int page = reg >> 8;
  
  	if (page >= ADV76XX_PAGE_MAX || !(BIT(page) & state->info->page_mask))
  		return -EINVAL;
  
  	reg &= 0xff;
  
  	return regmap_write(state->regmap[page], reg, val);
  }
  
  static void adv76xx_write_reg_seq(struct v4l2_subdev *sd,
  				  const struct adv76xx_reg_seq *reg_seq)
  {
  	unsigned int i;
  
  	for (i = 0; reg_seq[i].reg != ADV76XX_REG_SEQ_TERM; i++)
  		adv76xx_write_reg(sd, reg_seq[i].reg, reg_seq[i].val);
  }
  
  /* -----------------------------------------------------------------------------
   * Format helpers
   */
  
  static const struct adv76xx_format_info adv7604_formats[] = {
  	{ MEDIA_BUS_FMT_RGB888_1X24, ADV76XX_OP_CH_SEL_RGB, true, false,
  	  ADV76XX_OP_MODE_SEL_SDR_444 | ADV76XX_OP_FORMAT_SEL_8BIT },
  	{ MEDIA_BUS_FMT_YUYV8_2X8, ADV76XX_OP_CH_SEL_RGB, false, false,
  	  ADV76XX_OP_MODE_SEL_SDR_422 | ADV76XX_OP_FORMAT_SEL_8BIT },
  	{ MEDIA_BUS_FMT_YVYU8_2X8, ADV76XX_OP_CH_SEL_RGB, false, true,
  	  ADV76XX_OP_MODE_SEL_SDR_422 | ADV76XX_OP_FORMAT_SEL_8BIT },
  	{ MEDIA_BUS_FMT_YUYV10_2X10, ADV76XX_OP_CH_SEL_RGB, false, false,
  	  ADV76XX_OP_MODE_SEL_SDR_422 | ADV7604_OP_FORMAT_SEL_10BIT },
  	{ MEDIA_BUS_FMT_YVYU10_2X10, ADV76XX_OP_CH_SEL_RGB, false, true,
  	  ADV76XX_OP_MODE_SEL_SDR_422 | ADV7604_OP_FORMAT_SEL_10BIT },
  	{ MEDIA_BUS_FMT_YUYV12_2X12, ADV76XX_OP_CH_SEL_RGB, false, false,
  	  ADV76XX_OP_MODE_SEL_SDR_422 | ADV76XX_OP_FORMAT_SEL_12BIT },
  	{ MEDIA_BUS_FMT_YVYU12_2X12, ADV76XX_OP_CH_SEL_RGB, false, true,
  	  ADV76XX_OP_MODE_SEL_SDR_422 | ADV76XX_OP_FORMAT_SEL_12BIT },
  	{ MEDIA_BUS_FMT_UYVY8_1X16, ADV76XX_OP_CH_SEL_RBG, false, false,
  	  ADV76XX_OP_MODE_SEL_SDR_422_2X | ADV76XX_OP_FORMAT_SEL_8BIT },
  	{ MEDIA_BUS_FMT_VYUY8_1X16, ADV76XX_OP_CH_SEL_RBG, false, true,
  	  ADV76XX_OP_MODE_SEL_SDR_422_2X | ADV76XX_OP_FORMAT_SEL_8BIT },
  	{ MEDIA_BUS_FMT_YUYV8_1X16, ADV76XX_OP_CH_SEL_RGB, false, false,
  	  ADV76XX_OP_MODE_SEL_SDR_422_2X | ADV76XX_OP_FORMAT_SEL_8BIT },
  	{ MEDIA_BUS_FMT_YVYU8_1X16, ADV76XX_OP_CH_SEL_RGB, false, true,
  	  ADV76XX_OP_MODE_SEL_SDR_422_2X | ADV76XX_OP_FORMAT_SEL_8BIT },
  	{ MEDIA_BUS_FMT_UYVY10_1X20, ADV76XX_OP_CH_SEL_RBG, false, false,
  	  ADV76XX_OP_MODE_SEL_SDR_422_2X | ADV7604_OP_FORMAT_SEL_10BIT },
  	{ MEDIA_BUS_FMT_VYUY10_1X20, ADV76XX_OP_CH_SEL_RBG, false, true,
  	  ADV76XX_OP_MODE_SEL_SDR_422_2X | ADV7604_OP_FORMAT_SEL_10BIT },
  	{ MEDIA_BUS_FMT_YUYV10_1X20, ADV76XX_OP_CH_SEL_RGB, false, false,
  	  ADV76XX_OP_MODE_SEL_SDR_422_2X | ADV7604_OP_FORMAT_SEL_10BIT },
  	{ MEDIA_BUS_FMT_YVYU10_1X20, ADV76XX_OP_CH_SEL_RGB, false, true,
  	  ADV76XX_OP_MODE_SEL_SDR_422_2X | ADV7604_OP_FORMAT_SEL_10BIT },
  	{ MEDIA_BUS_FMT_UYVY12_1X24, ADV76XX_OP_CH_SEL_RBG, false, false,
  	  ADV76XX_OP_MODE_SEL_SDR_422_2X | ADV76XX_OP_FORMAT_SEL_12BIT },
  	{ MEDIA_BUS_FMT_VYUY12_1X24, ADV76XX_OP_CH_SEL_RBG, false, true,
  	  ADV76XX_OP_MODE_SEL_SDR_422_2X | ADV76XX_OP_FORMAT_SEL_12BIT },
  	{ MEDIA_BUS_FMT_YUYV12_1X24, ADV76XX_OP_CH_SEL_RGB, false, false,
  	  ADV76XX_OP_MODE_SEL_SDR_422_2X | ADV76XX_OP_FORMAT_SEL_12BIT },
  	{ MEDIA_BUS_FMT_YVYU12_1X24, ADV76XX_OP_CH_SEL_RGB, false, true,
  	  ADV76XX_OP_MODE_SEL_SDR_422_2X | ADV76XX_OP_FORMAT_SEL_12BIT },
  };
  
  static const struct adv76xx_format_info adv7611_formats[] = {
  	{ MEDIA_BUS_FMT_RGB888_1X24, ADV76XX_OP_CH_SEL_RGB, true, false,
  	  ADV76XX_OP_MODE_SEL_SDR_444 | ADV76XX_OP_FORMAT_SEL_8BIT },
  	{ MEDIA_BUS_FMT_YUYV8_2X8, ADV76XX_OP_CH_SEL_RGB, false, false,
  	  ADV76XX_OP_MODE_SEL_SDR_422 | ADV76XX_OP_FORMAT_SEL_8BIT },
  	{ MEDIA_BUS_FMT_YVYU8_2X8, ADV76XX_OP_CH_SEL_RGB, false, true,
  	  ADV76XX_OP_MODE_SEL_SDR_422 | ADV76XX_OP_FORMAT_SEL_8BIT },
  	{ MEDIA_BUS_FMT_YUYV12_2X12, ADV76XX_OP_CH_SEL_RGB, false, false,
  	  ADV76XX_OP_MODE_SEL_SDR_422 | ADV76XX_OP_FORMAT_SEL_12BIT },
  	{ MEDIA_BUS_FMT_YVYU12_2X12, ADV76XX_OP_CH_SEL_RGB, false, true,
  	  ADV76XX_OP_MODE_SEL_SDR_422 | ADV76XX_OP_FORMAT_SEL_12BIT },
  	{ MEDIA_BUS_FMT_UYVY8_1X16, ADV76XX_OP_CH_SEL_RBG, false, false,
  	  ADV76XX_OP_MODE_SEL_SDR_422_2X | ADV76XX_OP_FORMAT_SEL_8BIT },
  	{ MEDIA_BUS_FMT_VYUY8_1X16, ADV76XX_OP_CH_SEL_RBG, false, true,
  	  ADV76XX_OP_MODE_SEL_SDR_422_2X | ADV76XX_OP_FORMAT_SEL_8BIT },
  	{ MEDIA_BUS_FMT_YUYV8_1X16, ADV76XX_OP_CH_SEL_RGB, false, false,
  	  ADV76XX_OP_MODE_SEL_SDR_422_2X | ADV76XX_OP_FORMAT_SEL_8BIT },
  	{ MEDIA_BUS_FMT_YVYU8_1X16, ADV76XX_OP_CH_SEL_RGB, false, true,
  	  ADV76XX_OP_MODE_SEL_SDR_422_2X | ADV76XX_OP_FORMAT_SEL_8BIT },
  	{ MEDIA_BUS_FMT_UYVY12_1X24, ADV76XX_OP_CH_SEL_RBG, false, false,
  	  ADV76XX_OP_MODE_SEL_SDR_422_2X | ADV76XX_OP_FORMAT_SEL_12BIT },
  	{ MEDIA_BUS_FMT_VYUY12_1X24, ADV76XX_OP_CH_SEL_RBG, false, true,
  	  ADV76XX_OP_MODE_SEL_SDR_422_2X | ADV76XX_OP_FORMAT_SEL_12BIT },
  	{ MEDIA_BUS_FMT_YUYV12_1X24, ADV76XX_OP_CH_SEL_RGB, false, false,
  	  ADV76XX_OP_MODE_SEL_SDR_422_2X | ADV76XX_OP_FORMAT_SEL_12BIT },
  	{ MEDIA_BUS_FMT_YVYU12_1X24, ADV76XX_OP_CH_SEL_RGB, false, true,
  	  ADV76XX_OP_MODE_SEL_SDR_422_2X | ADV76XX_OP_FORMAT_SEL_12BIT },
  };
  
  static const struct adv76xx_format_info adv7612_formats[] = {
  	{ MEDIA_BUS_FMT_RGB888_1X24, ADV76XX_OP_CH_SEL_RGB, true, false,
  	  ADV76XX_OP_MODE_SEL_SDR_444 | ADV76XX_OP_FORMAT_SEL_8BIT },
  	{ MEDIA_BUS_FMT_YUYV8_2X8, ADV76XX_OP_CH_SEL_RGB, false, false,
  	  ADV76XX_OP_MODE_SEL_SDR_422 | ADV76XX_OP_FORMAT_SEL_8BIT },
  	{ MEDIA_BUS_FMT_YVYU8_2X8, ADV76XX_OP_CH_SEL_RGB, false, true,
  	  ADV76XX_OP_MODE_SEL_SDR_422 | ADV76XX_OP_FORMAT_SEL_8BIT },
  	{ MEDIA_BUS_FMT_UYVY8_1X16, ADV76XX_OP_CH_SEL_RBG, false, false,
  	  ADV76XX_OP_MODE_SEL_SDR_422_2X | ADV76XX_OP_FORMAT_SEL_8BIT },
  	{ MEDIA_BUS_FMT_VYUY8_1X16, ADV76XX_OP_CH_SEL_RBG, false, true,
  	  ADV76XX_OP_MODE_SEL_SDR_422_2X | ADV76XX_OP_FORMAT_SEL_8BIT },
  	{ MEDIA_BUS_FMT_YUYV8_1X16, ADV76XX_OP_CH_SEL_RGB, false, false,
  	  ADV76XX_OP_MODE_SEL_SDR_422_2X | ADV76XX_OP_FORMAT_SEL_8BIT },
  	{ MEDIA_BUS_FMT_YVYU8_1X16, ADV76XX_OP_CH_SEL_RGB, false, true,
  	  ADV76XX_OP_MODE_SEL_SDR_422_2X | ADV76XX_OP_FORMAT_SEL_8BIT },
  };
  
  static const struct adv76xx_format_info *
  adv76xx_format_info(struct adv76xx_state *state, u32 code)
  {
  	unsigned int i;
  
  	for (i = 0; i < state->info->nformats; ++i) {
  		if (state->info->formats[i].code == code)
  			return &state->info->formats[i];
  	}
  
  	return NULL;
  }
  
  /* ----------------------------------------------------------------------- */
  
  static inline bool is_analog_input(struct v4l2_subdev *sd)
  {
  	struct adv76xx_state *state = to_state(sd);
  
  	return state->selected_input == ADV7604_PAD_VGA_RGB ||
  	       state->selected_input == ADV7604_PAD_VGA_COMP;
  }
  
  static inline bool is_digital_input(struct v4l2_subdev *sd)
  {
  	struct adv76xx_state *state = to_state(sd);
  
  	return state->selected_input == ADV76XX_PAD_HDMI_PORT_A ||
  	       state->selected_input == ADV7604_PAD_HDMI_PORT_B ||
  	       state->selected_input == ADV7604_PAD_HDMI_PORT_C ||
  	       state->selected_input == ADV7604_PAD_HDMI_PORT_D;
  }
  
  static const struct v4l2_dv_timings_cap adv7604_timings_cap_analog = {
  	.type = V4L2_DV_BT_656_1120,
  	/* keep this initialization for compatibility with GCC < 4.4.6 */
  	.reserved = { 0 },
  	V4L2_INIT_BT_TIMINGS(0, 1920, 0, 1200, 25000000, 170000000,
  		V4L2_DV_BT_STD_CEA861 | V4L2_DV_BT_STD_DMT |
  			V4L2_DV_BT_STD_GTF | V4L2_DV_BT_STD_CVT,
  		V4L2_DV_BT_CAP_PROGRESSIVE | V4L2_DV_BT_CAP_REDUCED_BLANKING |
  			V4L2_DV_BT_CAP_CUSTOM)
  };
  
  static const struct v4l2_dv_timings_cap adv76xx_timings_cap_digital = {
  	.type = V4L2_DV_BT_656_1120,
  	/* keep this initialization for compatibility with GCC < 4.4.6 */
  	.reserved = { 0 },
  	V4L2_INIT_BT_TIMINGS(0, 1920, 0, 1200, 25000000, 225000000,
  		V4L2_DV_BT_STD_CEA861 | V4L2_DV_BT_STD_DMT |
  			V4L2_DV_BT_STD_GTF | V4L2_DV_BT_STD_CVT,
  		V4L2_DV_BT_CAP_PROGRESSIVE | V4L2_DV_BT_CAP_REDUCED_BLANKING |
  			V4L2_DV_BT_CAP_CUSTOM)
  };
  
  /*
   * Return the DV timings capabilities for the requested sink pad. As a special
   * case, pad value -1 returns the capabilities for the currently selected input.
   */
  static const struct v4l2_dv_timings_cap *
  adv76xx_get_dv_timings_cap(struct v4l2_subdev *sd, int pad)
  {
  	if (pad == -1) {
  		struct adv76xx_state *state = to_state(sd);
  
  		pad = state->selected_input;
  	}
  
  	switch (pad) {
  	case ADV76XX_PAD_HDMI_PORT_A:
  	case ADV7604_PAD_HDMI_PORT_B:
  	case ADV7604_PAD_HDMI_PORT_C:
  	case ADV7604_PAD_HDMI_PORT_D:
  		return &adv76xx_timings_cap_digital;
  
  	case ADV7604_PAD_VGA_RGB:
  	case ADV7604_PAD_VGA_COMP:
  	default:
  		return &adv7604_timings_cap_analog;
  	}
  }
  
  
  /* ----------------------------------------------------------------------- */
  
  #ifdef CONFIG_VIDEO_ADV_DEBUG
  static void adv76xx_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 adv76xx_g_register(struct v4l2_subdev *sd,
  					struct v4l2_dbg_register *reg)
  {
  	int ret;
  
  	ret = adv76xx_read_reg(sd, reg->reg);
  	if (ret < 0) {
  		v4l2_info(sd, "Register %03llx not supported\n", reg->reg);
  		adv76xx_inv_register(sd);
  		return ret;
  	}
  
  	reg->size = 1;
  	reg->val = ret;
  
  	return 0;
  }
  
  static int adv76xx_s_register(struct v4l2_subdev *sd,
  					const struct v4l2_dbg_register *reg)
  {
  	int ret;
  
  	ret = adv76xx_write_reg(sd, reg->reg, reg->val);
  	if (ret < 0) {
  		v4l2_info(sd, "Register %03llx not supported\n", reg->reg);
  		adv76xx_inv_register(sd);
  		return ret;
  	}
  
  	return 0;
  }
  #endif
  
  static unsigned int adv7604_read_cable_det(struct v4l2_subdev *sd)
  {
  	u8 value = io_read(sd, 0x6f);
  
  	return ((value & 0x10) >> 4)
  	     | ((value & 0x08) >> 2)
  	     | ((value & 0x04) << 0)
  	     | ((value & 0x02) << 2);
  }
  
  static unsigned int adv7611_read_cable_det(struct v4l2_subdev *sd)
  {
  	u8 value = io_read(sd, 0x6f);
  
  	return value & 1;
  }
  
  static unsigned int adv7612_read_cable_det(struct v4l2_subdev *sd)
  {
  	/*  Reads CABLE_DET_A_RAW. For input B support, need to
  	 *  account for bit 7 [MSB] of 0x6a (ie. CABLE_DET_B_RAW)
  	 */
  	u8 value = io_read(sd, 0x6f);
  
  	return value & 1;
  }
  
  static int adv76xx_s_detect_tx_5v_ctrl(struct v4l2_subdev *sd)
  {
  	struct adv76xx_state *state = to_state(sd);
  	const struct adv76xx_chip_info *info = state->info;
  	u16 cable_det = info->read_cable_det(sd);
  
  	return v4l2_ctrl_s_ctrl(state->detect_tx_5v_ctrl, cable_det);
  }
  
  static int find_and_set_predefined_video_timings(struct v4l2_subdev *sd,
  		u8 prim_mode,
  		const struct adv76xx_video_standards *predef_vid_timings,
  		const struct v4l2_dv_timings *timings)
  {
  	int i;
  
  	for (i = 0; predef_vid_timings[i].timings.bt.width; i++) {
  		if (!v4l2_match_dv_timings(timings, &predef_vid_timings[i].timings,
  				is_digital_input(sd) ? 250000 : 1000000, false))
  			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 adv76xx_state *state = to_state(sd);
  	int err;
  
  	v4l2_dbg(1, debug, sd, "%s", __func__);
  
  	if (adv76xx_has_afe(state)) {
  		/* reset to default values */
  		io_write(sd, 0x16, 0x43);
  		io_write(sd, 0x17, 0x5a);
  	}
  	/* disable embedded syncs for auto graphics mode */
  	cp_write_clr_set(sd, 0x81, 0x10, 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);
  
  	if (is_analog_input(sd)) {
  		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);
  	} else if (is_digital_input(sd)) {
  		err = find_and_set_predefined_video_timings(sd,
  				0x05, adv76xx_prim_mode_hdmi_comp, timings);
  		if (err)
  			err = find_and_set_predefined_video_timings(sd,
  					0x06, adv76xx_prim_mode_hdmi_gr, timings);
  	} else {
  		v4l2_dbg(2, debug, sd, "%s: Unknown port %d selected\n",
  				__func__, state->selected_input);
  		err = -1;
  	}
  
  
  	return err;
  }
  
  static void configure_custom_video_timings(struct v4l2_subdev *sd,
  		const struct v4l2_bt_timings *bt)
  {
  	struct adv76xx_state *state = to_state(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 * (ADV76XX_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__);
  
  	if (is_analog_input(sd)) {
  		/* 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_clr_set(sd, 0x81, 0x10, 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 (regmap_raw_write(state->regmap[ADV76XX_PAGE_IO],
  					0x16, pll, 2))
  			v4l2_err(sd, "writing to reg 0x16 and 0x17 failed\n");
  
  		/* 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);
  	} else if (is_digital_input(sd)) {
  		/* set default prim_mode/vid_std for HDMI
  		   according to [REF_03, c. 4.2] */
  		io_write(sd, 0x00, 0x02); /* video std */
  		io_write(sd, 0x01, 0x06); /* prim mode */
  	} else {
  		v4l2_dbg(2, debug, sd, "%s: Unknown port %d selected\n",
  				__func__, state->selected_input);
  	}
  
  	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 adv76xx_set_offset(struct v4l2_subdev *sd, bool auto_offset, u16 offset_a, u16 offset_b, u16 offset_c)
  {
  	struct adv76xx_state *state = to_state(sd);
  	u8 offset_buf[4];
  
  	if (auto_offset) {
  		offset_a = 0x3ff;
  		offset_b = 0x3ff;
  		offset_c = 0x3ff;
  	}
  
  	v4l2_dbg(2, debug, sd, "%s: %s offset: a = 0x%x, b = 0x%x, c = 0x%x\n",
  			__func__, auto_offset ? "Auto" : "Manual",
  			offset_a, offset_b, offset_c);
  
  	offset_buf[0] = (cp_read(sd, 0x77) & 0xc0) | ((offset_a & 0x3f0) >> 4);
  	offset_buf[1] = ((offset_a & 0x00f) << 4) | ((offset_b & 0x3c0) >> 6);
  	offset_buf[2] = ((offset_b & 0x03f) << 2) | ((offset_c & 0x300) >> 8);
  	offset_buf[3] = offset_c & 0x0ff;
  
  	/* Registers must be written in this order with no i2c access in between */
  	if (regmap_raw_write(state->regmap[ADV76XX_PAGE_CP],
  			0x77, offset_buf, 4))
  		v4l2_err(sd, "%s: i2c error writing to CP reg 0x77, 0x78, 0x79, 0x7a\n", __func__);
  }
  
  static void adv76xx_set_gain(struct v4l2_subdev *sd, bool auto_gain, u16 gain_a, u16 gain_b, u16 gain_c)
  {
  	struct adv76xx_state *state = to_state(sd);
  	u8 gain_buf[4];
  	u8 gain_man = 1;
  	u8 agc_mode_man = 1;
  
  	if (auto_gain) {
  		gain_man = 0;
  		agc_mode_man = 0;
  		gain_a = 0x100;
  		gain_b = 0x100;
  		gain_c = 0x100;
  	}
  
  	v4l2_dbg(2, debug, sd, "%s: %s gain: a = 0x%x, b = 0x%x, c = 0x%x\n",
  			__func__, auto_gain ? "Auto" : "Manual",
  			gain_a, gain_b, gain_c);
  
  	gain_buf[0] = ((gain_man << 7) | (agc_mode_man << 6) | ((gain_a & 0x3f0) >> 4));
  	gain_buf[1] = (((gain_a & 0x00f) << 4) | ((gain_b & 0x3c0) >> 6));
  	gain_buf[2] = (((gain_b & 0x03f) << 2) | ((gain_c & 0x300) >> 8));
  	gain_buf[3] = ((gain_c & 0x0ff));
  
  	/* Registers must be written in this order with no i2c access in between */
  	if (regmap_raw_write(state->regmap[ADV76XX_PAGE_CP],
  			     0x73, gain_buf, 4))
  		v4l2_err(sd, "%s: i2c error writing to CP reg 0x73, 0x74, 0x75, 0x76\n", __func__);
  }
  
  static void set_rgb_quantization_range(struct v4l2_subdev *sd)
  {
  	struct adv76xx_state *state = to_state(sd);
  	bool rgb_output = io_read(sd, 0x02) & 0x02;
  	bool hdmi_signal = hdmi_read(sd, 0x05) & 0x80;
  	u8 y = HDMI_COLORSPACE_RGB;
  
  	if (hdmi_signal && (io_read(sd, 0x60) & 1))
  		y = infoframe_read(sd, 0x01) >> 5;
  
  	v4l2_dbg(2, debug, sd, "%s: RGB quantization range: %d, RGB out: %d, HDMI: %d\n",
  			__func__, state->rgb_quantization_range,
  			rgb_output, hdmi_signal);
  
  	adv76xx_set_gain(sd, true, 0x0, 0x0, 0x0);
  	adv76xx_set_offset(sd, true, 0x0, 0x0, 0x0);
  	io_write_clr_set(sd, 0x02, 0x04, rgb_output ? 0 : 4);
  
  	switch (state->rgb_quantization_range) {
  	case V4L2_DV_RGB_RANGE_AUTO:
  		if (state->selected_input == ADV7604_PAD_VGA_RGB) {
  			/* Receiving analog RGB signal
  			 * Set RGB full range (0-255) */
  			io_write_clr_set(sd, 0x02, 0xf0, 0x10);
  			break;
  		}
  
  		if (state->selected_input == ADV7604_PAD_VGA_COMP) {
  			/* Receiving analog YPbPr signal
  			 * Set automode */
  			io_write_clr_set(sd, 0x02, 0xf0, 0xf0);
  			break;
  		}
  
  		if (hdmi_signal) {
  			/* Receiving HDMI signal
  			 * Set automode */
  			io_write_clr_set(sd, 0x02, 0xf0, 0xf0);
  			break;
  		}
  
  		/* Receiving DVI-D signal
  		 * ADV7604 selects RGB limited range regardless of
  		 * input format (CE/IT) in automatic mode */
  		if (state->timings.bt.flags & V4L2_DV_FL_IS_CE_VIDEO) {
  			/* RGB limited range (16-235) */
  			io_write_clr_set(sd, 0x02, 0xf0, 0x00);
  		} else {
  			/* RGB full range (0-255) */
  			io_write_clr_set(sd, 0x02, 0xf0, 0x10);
  
  			if (is_digital_input(sd) && rgb_output) {
  				adv76xx_set_offset(sd, false, 0x40, 0x40, 0x40);
  			} else {
  				adv76xx_set_gain(sd, false, 0xe0, 0xe0, 0xe0);
  				adv76xx_set_offset(sd, false, 0x70, 0x70, 0x70);
  			}
  		}
  		break;
  	case V4L2_DV_RGB_RANGE_LIMITED:
  		if (state->selected_input == ADV7604_PAD_VGA_COMP) {
  			/* YCrCb limited range (16-235) */
  			io_write_clr_set(sd, 0x02, 0xf0, 0x20);
  			break;
  		}
  
  		if (y != HDMI_COLORSPACE_RGB)
  			break;
  
  		/* RGB limited range (16-235) */
  		io_write_clr_set(sd, 0x02, 0xf0, 0x00);
  
  		break;
  	case V4L2_DV_RGB_RANGE_FULL:
  		if (state->selected_input == ADV7604_PAD_VGA_COMP) {
  			/* YCrCb full range (0-255) */
  			io_write_clr_set(sd, 0x02, 0xf0, 0x60);
  			break;
  		}
  
  		if (y != HDMI_COLORSPACE_RGB)
  			break;
  
  		/* RGB full range (0-255) */
  		io_write_clr_set(sd, 0x02, 0xf0, 0x10);
  
  		if (is_analog_input(sd) || hdmi_signal)
  			break;
  
  		/* Adjust gain/offset for DVI-D signals only */
  		if (rgb_output) {
  			adv76xx_set_offset(sd, false, 0x40, 0x40, 0x40);
  		} else {
  			adv76xx_set_gain(sd, false, 0xe0, 0xe0, 0xe0);
  			adv76xx_set_offset(sd, false, 0x70, 0x70, 0x70);
  		}
  		break;
  	}
  }
  
  static int adv76xx_s_ctrl(struct v4l2_ctrl *ctrl)
  {
  	struct v4l2_subdev *sd =
  		&container_of(ctrl->handler, struct adv76xx_state, hdl)->sd;
  
  	struct adv76xx_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:
  		if (!adv76xx_has_afe(state))
  			return -EINVAL;
  		/* 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_clr_set(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 int adv76xx_g_volatile_ctrl(struct v4l2_ctrl *ctrl)
  {
  	struct v4l2_subdev *sd =
  		&container_of(ctrl->handler, struct adv76xx_state, hdl)->sd;
  
  	if (ctrl->id == V4L2_CID_DV_RX_IT_CONTENT_TYPE) {
  		ctrl->val = V4L2_DV_IT_CONTENT_TYPE_NO_ITC;
  		if ((io_read(sd, 0x60) & 1) && (infoframe_read(sd, 0x03) & 0x80))
  			ctrl->val = (infoframe_read(sd, 0x05) >> 4) & 3;
  		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)
  {
  	struct adv76xx_state *state = to_state(sd);
  
  	return !(io_read(sd, 0x6a) & (0x10 >> state->selected_input));
  }
  
  static inline bool no_lock_tmds(struct v4l2_subdev *sd)
  {
  	struct adv76xx_state *state = to_state(sd);
  	const struct adv76xx_chip_info *info = state->info;
  
  	return (io_read(sd, 0x6a) & info->tdms_lock_mask) != info->tdms_lock_mask;
  }
  
  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)
  {
  	struct adv76xx_state *state = to_state(sd);
  
  	/*
  	 * Chips without a AFE don't expose registers for the SSPD, so just assume
  	 * that we have a lock.
  	 */
  	if (adv76xx_has_afe(state))
  		return false;
  
  	/* 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)
  {
  	bool ret;
  
  	ret = no_power(sd);
  
  	ret |= no_lock_stdi(sd);
  	ret |= no_lock_sspd(sd);
  
  	if (is_digital_input(sd)) {
  		ret |= no_lock_tmds(sd);
  		ret |= no_signal_tmds(sd);
  	}
  
  	return ret;
  }
  
  static inline bool no_lock_cp(struct v4l2_subdev *sd)
  {
  	struct adv76xx_state *state = to_state(sd);
  
  	if (!adv76xx_has_afe(state))
  		return false;
  
  	/* 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 inline bool in_free_run(struct v4l2_subdev *sd)
  {
  	return cp_read(sd, 0xff) & 0x10;
  }
  
  static int adv76xx_g_input_status(struct v4l2_subdev *sd, u32 *status)
  {
  	*status = 0;
  	*status |= no_power(sd) ? V4L2_IN_ST_NO_POWER : 0;
  	*status |= no_signal(sd) ? V4L2_IN_ST_NO_SIGNAL : 0;
  	if (!in_free_run(sd) && no_lock_cp(sd))
  		*status |= is_digital_input(sd) ?
  			   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 adv76xx_state *state = to_state(sd);
  	u32 hfreq = (ADV76XX_FSC * 8) / stdi->bl;
  	u32 pix_clk;
  	int i;
  
  	for (i = 0; v4l2_dv_timings_presets[i].bt.width; i++) {
  		const struct v4l2_bt_timings *bt = &v4l2_dv_timings_presets[i].bt;
  
  		if (!v4l2_valid_dv_timings(&v4l2_dv_timings_presets[i],
  					   adv76xx_get_dv_timings_cap(sd, -1),
  					   adv76xx_check_dv_timings, NULL))
  			continue;
  		if (vtotal(bt) != stdi->lcf + 1)
  			continue;
  		if (bt->vsync != stdi->lcvs)
  			continue;
  
  		pix_clk = hfreq * htotal(bt);
  
  		if ((pix_clk < bt->pixelclock + 1000000) &&
  		    (pix_clk > bt->pixelclock - 1000000)) {
  			*timings = v4l2_dv_timings_presets[i];
  			return 0;
  		}
  	}
  
  	if (v4l2_detect_cvt(stdi->lcf + 1, hfreq, stdi->lcvs, 0,
  			(stdi->hs_pol == '+' ? V4L2_DV_HSYNC_POS_POL : 0) |
  			(stdi->vs_pol == '+' ? V4L2_DV_VSYNC_POS_POL : 0),
  			false, 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),
  			false, 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)
  {
  	struct adv76xx_state *state = to_state(sd);
  	const struct adv76xx_chip_info *info = state->info;
  	u8 polarity;
  
  	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_read16(sd, 0xb1, 0x3fff);
  	stdi->lcf = cp_read16(sd, info->lcf_reg, 0x7ff);
  	stdi->lcvs = cp_read(sd, 0xb3) >> 3;
  	stdi->interlaced = io_read(sd, 0x12) & 0x10;
  
  	if (adv76xx_has_afe(state)) {
  		/* read SSPD */
  		polarity = cp_read(sd, 0xb5);
  		if ((polarity & 0x03) == 0x01) {
  			stdi->hs_pol = polarity & 0x10
  				     ? (polarity & 0x08 ? '+' : '-') : 'x';
  			stdi->vs_pol = polarity & 0x40
  				     ? (polarity & 0x20 ? '+' : '-') : 'x';
  		} else {
  			stdi->hs_pol = 'x';
  			stdi->vs_pol = 'x';
  		}
  	} else {
  		polarity = hdmi_read(sd, 0x05);
  		stdi->hs_pol = polarity & 0x20 ? '+' : '-';
  		stdi->vs_pol = polarity & 0x10 ? '+' : '-';
  	}
  
  	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 adv76xx_enum_dv_timings(struct v4l2_subdev *sd,
  			struct v4l2_enum_dv_timings *timings)
  {
  	struct adv76xx_state *state = to_state(sd);
  
  	if (timings->pad >= state->source_pad)
  		return -EINVAL;
  
  	return v4l2_enum_dv_timings_cap(timings,
  		adv76xx_get_dv_timings_cap(sd, timings->pad),
  		adv76xx_check_dv_timings, NULL);
  }
  
  static int adv76xx_dv_timings_cap(struct v4l2_subdev *sd,
  			struct v4l2_dv_timings_cap *cap)
  {
  	struct adv76xx_state *state = to_state(sd);
  	unsigned int pad = cap->pad;
  
  	if (cap->pad >= state->source_pad)
  		return -EINVAL;
  
  	*cap = *adv76xx_get_dv_timings_cap(sd, pad);
  	cap->pad = pad;
  
  	return 0;
  }
  
  /* Fill the optional fields .standards and .flags in struct v4l2_dv_timings
     if the format is listed in adv76xx_timings[] */
  static void adv76xx_fill_optional_dv_timings_fields(struct v4l2_subdev *sd,
  		struct v4l2_dv_timings *timings)
  {
  	v4l2_find_dv_timings_cap(timings, adv76xx_get_dv_timings_cap(sd, -1),
  				 is_digital_input(sd) ? 250000 : 1000000,
  				 adv76xx_check_dv_timings, NULL);
  }
  
  static unsigned int adv7604_read_hdmi_pixelclock(struct v4l2_subdev *sd)
  {
  	unsigned int freq;
  	int a, b;
  
  	a = hdmi_read(sd, 0x06);
  	b = hdmi_read(sd, 0x3b);
  	if (a < 0 || b < 0)
  		return 0;
  	freq =  a * 1000000 + ((b & 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;
  	}
  
  	return freq;
  }
  
  static unsigned int adv7611_read_hdmi_pixelclock(struct v4l2_subdev *sd)
  {
  	int a, b;
  
  	a = hdmi_read(sd, 0x51);
  	b = hdmi_read(sd, 0x52);
  	if (a < 0 || b < 0)
  		return 0;
  	return ((a << 1) | (b >> 7)) * 1000000 + (b & 0x7f) * 1000000 / 128;
  }
  
  static int adv76xx_query_dv_timings(struct v4l2_subdev *sd,
  			struct v4l2_dv_timings *timings)
  {
  	struct adv76xx_state *state = to_state(sd);
  	const struct adv76xx_chip_info *info = state->info;
  	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)) {
  		state->restart_stdi_once = true;
  		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 (is_digital_input(sd)) {
  		bool hdmi_signal = hdmi_read(sd, 0x05) & 0x80;
  		u8 vic = 0;
  		u32 w, h;
  
  		w = hdmi_read16(sd, 0x07, info->linewidth_mask);
  		h = hdmi_read16(sd, 0x09, info->field0_height_mask);
  
  		if (hdmi_signal && (io_read(sd, 0x60) & 1))
  			vic = infoframe_read(sd, 0x04);
  
  		if (vic && v4l2_find_dv_timings_cea861_vic(timings, vic) &&
  		    bt->width == w && bt->height == h)
  			goto found;
  
  		timings->type = V4L2_DV_BT_656_1120;
  
  		bt->width = w;
  		bt->height = h;
  		bt->pixelclock = info->read_hdmi_pixelclock(sd);
  		bt->hfrontporch = hdmi_read16(sd, 0x20, info->hfrontporch_mask);
  		bt->hsync = hdmi_read16(sd, 0x22, info->hsync_mask);
  		bt->hbackporch = hdmi_read16(sd, 0x24, info->hbackporch_mask);
  		bt->vfrontporch = hdmi_read16(sd, 0x2a,
  			info->field0_vfrontporch_mask) / 2;
  		bt->vsync = hdmi_read16(sd, 0x2e, info->field0_vsync_mask) / 2;
  		bt->vbackporch = hdmi_read16(sd, 0x32,
  			info->field0_vbackporch_mask) / 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_read16(sd, 0x0b,
  				info->field1_height_mask);
  			bt->il_vfrontporch = hdmi_read16(sd, 0x2c,
  				info->field1_vfrontporch_mask) / 2;
  			bt->il_vsync = hdmi_read16(sd, 0x30,
  				info->field1_vsync_mask) / 2;
  			bt->il_vbackporch = hdmi_read16(sd, 0x34,
  				info->field1_vbackporch_mask) / 2;
  		}
  		adv76xx_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_clr_set(sd, 0x86, 0x06, 0x00);
  				/* trigger STDI restart */
  				cp_write_clr_set(sd, 0x86, 0x06, 0x04);
  				/* reset to continuous mode */
  				cp_write_clr_set(sd, 0x86, 0x06, 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 ((is_analog_input(sd) && bt->pixelclock > 170000000) ||
  			(is_digital_input(sd) && 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, "adv76xx_query_dv_timings: ",
  				      timings, true);
  
  	return 0;
  }
  
  static int adv76xx_s_dv_timings(struct v4l2_subdev *sd,
  		struct v4l2_dv_timings *timings)
  {
  	struct adv76xx_state *state = to_state(sd);
  	struct v4l2_bt_timings *bt;
  	int err;
  
  	if (!timings)
  		return -EINVAL;
  
  	if (v4l2_match_dv_timings(&state->timings, timings, 0, false)) {
  		v4l2_dbg(1, debug, sd, "%s: no change\n", __func__);
  		return 0;
  	}
  
  	bt = &timings->bt;
  
  	if (!v4l2_valid_dv_timings(timings, adv76xx_get_dv_timings_cap(sd, -1),
  				   adv76xx_check_dv_timings, NULL))
  		return -ERANGE;
  
  	adv76xx_fill_optional_dv_timings_fields(sd, timings);
  
  	state->timings = *timings;
  
  	cp_write_clr_set(sd, 0x91, 0x40, bt->interlaced ? 0x40 : 0x00);
  
  	/* 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, "adv76xx_s_dv_timings: ",
  				      timings, true);
  	return 0;
  }
  
  static int adv76xx_g_dv_timings(struct v4l2_subdev *sd,
  		struct v4l2_dv_timings *timings)
  {
  	struct adv76xx_state *state = to_state(sd);
  
  	*timings = state->timings;
  	return 0;
  }
  
  static void adv7604_set_termination(struct v4l2_subdev *sd, bool enable)
  {
  	hdmi_write(sd, 0x01, enable ? 0x00 : 0x78);
  }
  
  static void adv7611_set_termination(struct v4l2_subdev *sd, bool enable)
  {
  	hdmi_write(sd, 0x83, enable ? 0xfe : 0xff);
  }
  
  static void enable_input(struct v4l2_subdev *sd)
  {
  	struct adv76xx_state *state = to_state(sd);
  
  	if (is_analog_input(sd)) {
  		io_write(sd, 0x15, 0xb0);   /* Disable Tristate of Pins (no audio) */
  	} else if (is_digital_input(sd)) {
  		hdmi_write_clr_set(sd, 0x00, 0x03, state->selected_input);
  		state->info->set_termination(sd, true);
  		io_write(sd, 0x15, 0xa0);   /* Disable Tristate of Pins */
  		hdmi_write_clr_set(sd, 0x1a, 0x10, 0x00); /* Unmute audio */
  	} else {
  		v4l2_dbg(2, debug, sd, "%s: Unknown port %d selected\n",
  				__func__, state->selected_input);
  	}
  }
  
  static void disable_input(struct v4l2_subdev *sd)
  {
  	struct adv76xx_state *state = to_state(sd);
  
  	hdmi_write_clr_set(sd, 0x1a, 0x10, 0x10); /* Mute audio */
  	msleep(16); /* 512 samples with >= 32 kHz sample rate [REF_03, c. 7.16.10] */
  	io_write(sd, 0x15, 0xbe);   /* Tristate all outputs from video core */
  	state->info->set_termination(sd, false);
  }
  
  static void select_input(struct v4l2_subdev *sd)
  {
  	struct adv76xx_state *state = to_state(sd);
  	const struct adv76xx_chip_info *info = state->info;
  
  	if (is_analog_input(sd)) {
  		adv76xx_write_reg_seq(sd, info->recommended_settings[0]);
  
  		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 */
  	} else if (is_digital_input(sd)) {
  		hdmi_write(sd, 0x00, state->selected_input & 0x03);
  
  		adv76xx_write_reg_seq(sd, info->recommended_settings[1]);
  
  		if (adv76xx_has_afe(state)) {
  			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 */
  		}
  
  		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 */
  	} else {
  		v4l2_dbg(2, debug, sd, "%s: Unknown port %d selected\n",
  				__func__, state->selected_input);
  	}
  }
  
  static int adv76xx_s_routing(struct v4l2_subdev *sd,
  		u32 input, u32 output, u32 config)
  {
  	struct adv76xx_state *state = to_state(sd);
  
  	v4l2_dbg(2, debug, sd, "%s: input %d, selected input %d",
  			__func__, input, state->selected_input);
  
  	if (input == state->selected_input)
  		return 0;
  
  	if (input > state->info->max_port)
  		return -EINVAL;
  
  	state->selected_input = input;
  
  	disable_input(sd);
  	select_input(sd);
  	enable_input(sd);
  
  	v4l2_subdev_notify_event(sd, &adv76xx_ev_fmt);
  
  	return 0;
  }
  
  static int adv76xx_enum_mbus_code(struct v4l2_subdev *sd,
  				  struct v4l2_subdev_pad_config *cfg,
  				  struct v4l2_subdev_mbus_code_enum *code)
  {
  	struct adv76xx_state *state = to_state(sd);
  
  	if (code->index >= state->info->nformats)
  		return -EINVAL;
  
  	code->code = state->info->formats[code->index].code;
  
  	return 0;
  }
  
  static void adv76xx_fill_format(struct adv76xx_state *state,
  				struct v4l2_mbus_framefmt *format)
  {
  	memset(format, 0, sizeof(*format));
  
  	format->width = state->timings.bt.width;
  	format->height = state->timings.bt.height;
  	format->field = V4L2_FIELD_NONE;
  	format->colorspace = V4L2_COLORSPACE_SRGB;
  
  	if (state->timings.bt.flags & V4L2_DV_FL_IS_CE_VIDEO)
  		format->colorspace = (state->timings.bt.height <= 576) ?
  			V4L2_COLORSPACE_SMPTE170M : V4L2_COLORSPACE_REC709;
  }
  
  /*
   * Compute the op_ch_sel value required to obtain on the bus the component order
   * corresponding to the selected format taking into account bus reordering
   * applied by the board at the output of the device.
   *
   * The following table gives the op_ch_value from the format component order
   * (expressed as op_ch_sel value in column) and the bus reordering (expressed as
   * adv76xx_bus_order value in row).
   *
   *           |	GBR(0)	GRB(1)	BGR(2)	RGB(3)	BRG(4)	RBG(5)
   * ----------+-------------------------------------------------
   * RGB (NOP) |	GBR	GRB	BGR	RGB	BRG	RBG
   * GRB (1-2) |	BGR	RGB	GBR	GRB	RBG	BRG
   * RBG (2-3) |	GRB	GBR	BRG	RBG	BGR	RGB
   * BGR (1-3) |	RBG	BRG	RGB	BGR	GRB	GBR
   * BRG (ROR) |	BRG	RBG	GRB	GBR	RGB	BGR
   * GBR (ROL) |	RGB	BGR	RBG	BRG	GBR	GRB
   */
  static unsigned int adv76xx_op_ch_sel(struct adv76xx_state *state)
  {
  #define _SEL(a,b,c,d,e,f)	{ \
  	ADV76XX_OP_CH_SEL_##a, ADV76XX_OP_CH_SEL_##b, ADV76XX_OP_CH_SEL_##c, \
  	ADV76XX_OP_CH_SEL_##d, ADV76XX_OP_CH_SEL_##e, ADV76XX_OP_CH_SEL_##f }
  #define _BUS(x)			[ADV7604_BUS_ORDER_##x]
  
  	static const unsigned int op_ch_sel[6][6] = {
  		_BUS(RGB) /* NOP */ = _SEL(GBR, GRB, BGR, RGB, BRG, RBG),
  		_BUS(GRB) /* 1-2 */ = _SEL(BGR, RGB, GBR, GRB, RBG, BRG),
  		_BUS(RBG) /* 2-3 */ = _SEL(GRB, GBR, BRG, RBG, BGR, RGB),
  		_BUS(BGR) /* 1-3 */ = _SEL(RBG, BRG, RGB, BGR, GRB, GBR),
  		_BUS(BRG) /* ROR */ = _SEL(BRG, RBG, GRB, GBR, RGB, BGR),
  		_BUS(GBR) /* ROL */ = _SEL(RGB, BGR, RBG, BRG, GBR, GRB),
  	};
  
  	return op_ch_sel[state->pdata.bus_order][state->format->op_ch_sel >> 5];
  }
  
  static void adv76xx_setup_format(struct adv76xx_state *state)
  {
  	struct v4l2_subdev *sd = &state->sd;
  
  	io_write_clr_set(sd, 0x02, 0x02,
  			state->format->rgb_out ? ADV76XX_RGB_OUT : 0);
  	io_write(sd, 0x03, state->format->op_format_sel |
  		 state->pdata.op_format_mode_sel);
  	io_write_clr_set(sd, 0x04, 0xe0, adv76xx_op_ch_sel(state));
  	io_write_clr_set(sd, 0x05, 0x01,
  			state->format->swap_cb_cr ? ADV76XX_OP_SWAP_CB_CR : 0);
  	set_rgb_quantization_range(sd);
  }
  
  static int adv76xx_get_format(struct v4l2_subdev *sd,
  			      struct v4l2_subdev_pad_config *cfg,
  			      struct v4l2_subdev_format *format)
  {
  	struct adv76xx_state *state = to_state(sd);
  
  	if (format->pad != state->source_pad)
  		return -EINVAL;
  
  	adv76xx_fill_format(state, &format->format);
  
  	if (format->which == V4L2_SUBDEV_FORMAT_TRY) {
  		struct v4l2_mbus_framefmt *fmt;
  
  		fmt = v4l2_subdev_get_try_format(sd, cfg, format->pad);
  		format->format.code = fmt->code;
  	} else {
  		format->format.code = state->format->code;
  	}
  
  	return 0;
  }
  
  static int adv76xx_get_selection(struct v4l2_subdev *sd,
  				 struct v4l2_subdev_pad_config *cfg,
  				 struct v4l2_subdev_selection *sel)
  {
  	struct adv76xx_state *state = to_state(sd);
  
  	if (sel->which != V4L2_SUBDEV_FORMAT_ACTIVE)
  		return -EINVAL;
  	/* Only CROP, CROP_DEFAULT and CROP_BOUNDS are supported */
  	if (sel->target > V4L2_SEL_TGT_CROP_BOUNDS)
  		return -EINVAL;
  
  	sel->r.left	= 0;
  	sel->r.top	= 0;
  	sel->r.width	= state->timings.bt.width;
  	sel->r.height	= state->timings.bt.height;
  
  	return 0;
  }
  
  static int adv76xx_set_format(struct v4l2_subdev *sd,
  			      struct v4l2_subdev_pad_config *cfg,
  			      struct v4l2_subdev_format *format)
  {
  	struct adv76xx_state *state = to_state(sd);
  	const struct adv76xx_format_info *info;
  
  	if (format->pad != state->source_pad)
  		return -EINVAL;
  
  	info = adv76xx_format_info(state, format->format.code);
  	if (!info)
  		info = adv76xx_format_info(state, MEDIA_BUS_FMT_YUYV8_2X8);
  
  	adv76xx_fill_format(state, &format->format);
  	format->format.code = info->code;
  
  	if (format->which == V4L2_SUBDEV_FORMAT_TRY) {
  		struct v4l2_mbus_framefmt *fmt;
  
  		fmt = v4l2_subdev_get_try_format(sd, cfg, format->pad);
  		fmt->code = format->format.code;
  	} else {
  		state->format = info;
  		adv76xx_setup_format(state);
  	}
  
  	return 0;
  }
  
  #if IS_ENABLED(CONFIG_VIDEO_ADV7604_CEC)
  static void adv76xx_cec_tx_raw_status(struct v4l2_subdev *sd, u8 tx_raw_status)
  {
  	struct adv76xx_state *state = to_state(sd);
  
  	if ((cec_read(sd, 0x11) & 0x01) == 0) {
  		v4l2_dbg(1, debug, sd, "%s: tx raw: tx disabled\n", __func__);
  		return;
  	}
  
  	if (tx_raw_status & 0x02) {
  		v4l2_dbg(1, debug, sd, "%s: tx raw: arbitration lost\n",
  			 __func__);
  		cec_transmit_done(state->cec_adap, CEC_TX_STATUS_ARB_LOST,
  				  1, 0, 0, 0);
  		return;
  	}
  	if (tx_raw_status & 0x04) {
  		u8 status;
  		u8 nack_cnt;
  		u8 low_drive_cnt;
  
  		v4l2_dbg(1, debug, sd, "%s: tx raw: retry failed\n", __func__);
  		/*
  		 * We set this status bit since this hardware performs
  		 * retransmissions.
  		 */
  		status = CEC_TX_STATUS_MAX_RETRIES;
  		nack_cnt = cec_read(sd, 0x14) & 0xf;
  		if (nack_cnt)
  			status |= CEC_TX_STATUS_NACK;
  		low_drive_cnt = cec_read(sd, 0x14) >> 4;
  		if (low_drive_cnt)
  			status |= CEC_TX_STATUS_LOW_DRIVE;
  		cec_transmit_done(state->cec_adap, status,
  				  0, nack_cnt, low_drive_cnt, 0);
  		return;
  	}
  	if (tx_raw_status & 0x01) {
  		v4l2_dbg(1, debug, sd, "%s: tx raw: ready ok\n", __func__);
  		cec_transmit_done(state->cec_adap, CEC_TX_STATUS_OK, 0, 0, 0, 0);
  		return;
  	}
  }
  
  static void adv76xx_cec_isr(struct v4l2_subdev *sd, bool *handled)
  {
  	struct adv76xx_state *state = to_state(sd);
  	u8 cec_irq;
  
  	/* cec controller */
  	cec_irq = io_read(sd, 0x4d) & 0x0f;
  	if (!cec_irq)
  		return;
  
  	v4l2_dbg(1, debug, sd, "%s: cec: irq 0x%x\n", __func__, cec_irq);
  	adv76xx_cec_tx_raw_status(sd, cec_irq);
  	if (cec_irq & 0x08) {
  		struct cec_msg msg;
  
  		msg.len = cec_read(sd, 0x25) & 0x1f;
  		if (msg.len > 16)
  			msg.len = 16;
  
  		if (msg.len) {
  			u8 i;
  
  			for (i = 0; i < msg.len; i++)
  				msg.msg[i] = cec_read(sd, i + 0x15);
  			cec_write(sd, 0x26, 0x01); /* re-enable rx */
  			cec_received_msg(state->cec_adap, &msg);
  		}
  	}
  
  	/* note: the bit order is swapped between 0x4d and 0x4e */
  	cec_irq = ((cec_irq & 0x08) >> 3) | ((cec_irq & 0x04) >> 1) |
  		  ((cec_irq & 0x02) << 1) | ((cec_irq & 0x01) << 3);
  	io_write(sd, 0x4e, cec_irq);
  
  	if (handled)
  		*handled = true;
  }
  
  static int adv76xx_cec_adap_enable(struct cec_adapter *adap, bool enable)
  {
  	struct adv76xx_state *state = cec_get_drvdata(adap);
  	struct v4l2_subdev *sd = &state->sd;
  
  	if (!state->cec_enabled_adap && enable) {
  		cec_write_clr_set(sd, 0x2a, 0x01, 0x01); /* power up cec */
  		cec_write(sd, 0x2c, 0x01);	/* cec soft reset */
  		cec_write_clr_set(sd, 0x11, 0x01, 0); /* initially disable tx */
  		/* enabled irqs: */
  		/* tx: ready */
  		/* tx: arbitration lost */
  		/* tx: retry timeout */
  		/* rx: ready */
  		io_write_clr_set(sd, 0x50, 0x0f, 0x0f);
  		cec_write(sd, 0x26, 0x01);            /* enable rx */
  	} else if (state->cec_enabled_adap && !enable) {
  		/* disable cec interrupts */
  		io_write_clr_set(sd, 0x50, 0x0f, 0x00);
  		/* disable address mask 1-3 */
  		cec_write_clr_set(sd, 0x27, 0x70, 0x00);
  		/* power down cec section */
  		cec_write_clr_set(sd, 0x2a, 0x01, 0x00);
  		state->cec_valid_addrs = 0;
  	}
  	state->cec_enabled_adap = enable;
  	adv76xx_s_detect_tx_5v_ctrl(sd);
  	return 0;
  }
  
  static int adv76xx_cec_adap_log_addr(struct cec_adapter *adap, u8 addr)
  {
  	struct adv76xx_state *state = cec_get_drvdata(adap);
  	struct v4l2_subdev *sd = &state->sd;
  	unsigned int i, free_idx = ADV76XX_MAX_ADDRS;
  
  	if (!state->cec_enabled_adap)
  		return addr == CEC_LOG_ADDR_INVALID ? 0 : -EIO;
  
  	if (addr == CEC_LOG_ADDR_INVALID) {
  		cec_write_clr_set(sd, 0x27, 0x70, 0);
  		state->cec_valid_addrs = 0;
  		return 0;
  	}
  
  	for (i = 0; i < ADV76XX_MAX_ADDRS; i++) {
  		bool is_valid = state->cec_valid_addrs & (1 << i);
  
  		if (free_idx == ADV76XX_MAX_ADDRS && !is_valid)
  			free_idx = i;
  		if (is_valid && state->cec_addr[i] == addr)
  			return 0;
  	}
  	if (i == ADV76XX_MAX_ADDRS) {
  		i = free_idx;
  		if (i == ADV76XX_MAX_ADDRS)
  			return -ENXIO;
  	}
  	state->cec_addr[i] = addr;
  	state->cec_valid_addrs |= 1 << i;
  
  	switch (i) {
  	case 0:
  		/* enable address mask 0 */
  		cec_write_clr_set(sd, 0x27, 0x10, 0x10);
  		/* set address for mask 0 */
  		cec_write_clr_set(sd, 0x28, 0x0f, addr);
  		break;
  	case 1:
  		/* enable address mask 1 */
  		cec_write_clr_set(sd, 0x27, 0x20, 0x20);
  		/* set address for mask 1 */
  		cec_write_clr_set(sd, 0x28, 0xf0, addr << 4);
  		break;
  	case 2:
  		/* enable address mask 2 */
  		cec_write_clr_set(sd, 0x27, 0x40, 0x40);
  		/* set address for mask 1 */
  		cec_write_clr_set(sd, 0x29, 0x0f, addr);
  		break;
  	}
  	return 0;
  }
  
  static int adv76xx_cec_adap_transmit(struct cec_adapter *adap, u8 attempts,
  				     u32 signal_free_time, struct cec_msg *msg)
  {
  	struct adv76xx_state *state = cec_get_drvdata(adap);
  	struct v4l2_subdev *sd = &state->sd;
  	u8 len = msg->len;
  	unsigned int i;
  
  	/*
  	 * The number of retries is the number of attempts - 1, but retry
  	 * at least once. It's not clear if a value of 0 is allowed, so
  	 * let's do at least one retry.
  	 */
  	cec_write_clr_set(sd, 0x12, 0x70, max(1, attempts - 1) << 4);
  
  	if (len > 16) {
  		v4l2_err(sd, "%s: len exceeded 16 (%d)\n", __func__, len);
  		return -EINVAL;
  	}
  
  	/* write data */
  	for (i = 0; i < len; i++)
  		cec_write(sd, i, msg->msg[i]);
  
  	/* set length (data + header) */
  	cec_write(sd, 0x10, len);
  	/* start transmit, enable tx */
  	cec_write(sd, 0x11, 0x01);
  	return 0;
  }
  
  static const struct cec_adap_ops adv76xx_cec_adap_ops = {
  	.adap_enable = adv76xx_cec_adap_enable,
  	.adap_log_addr = adv76xx_cec_adap_log_addr,
  	.adap_transmit = adv76xx_cec_adap_transmit,
  };
  #endif
  
  static int adv76xx_isr(struct v4l2_subdev *sd, u32 status, bool *handled)
  {
  	struct adv76xx_state *state = to_state(sd);
  	const struct adv76xx_chip_info *info = state->info;
  	const u8 irq_reg_0x43 = io_read(sd, 0x43);
  	const u8 irq_reg_0x6b = io_read(sd, 0x6b);
  	const u8 irq_reg_0x70 = io_read(sd, 0x70);
  	u8 fmt_change_digital;
  	u8 fmt_change;
  	u8 tx_5v;
  
  	if (irq_reg_0x43)
  		io_write(sd, 0x44, irq_reg_0x43);
  	if (irq_reg_0x70)
  		io_write(sd, 0x71, irq_reg_0x70);
  	if (irq_reg_0x6b)
  		io_write(sd, 0x6c, irq_reg_0x6b);
  
  	v4l2_dbg(2, debug, sd, "%s: ", __func__);
  
  	/* format change */
  	fmt_change = irq_reg_0x43 & 0x98;
  	fmt_change_digital = is_digital_input(sd)
  			   ? irq_reg_0x6b & info->fmt_change_digital_mask
  			   : 0;
  
  	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);
  
  		v4l2_subdev_notify_event(sd, &adv76xx_ev_fmt);
  
  		if (handled)
  			*handled = true;
  	}
  	/* HDMI/DVI mode */
  	if (irq_reg_0x6b & 0x01) {
  		v4l2_dbg(1, debug, sd, "%s: irq %s mode\n", __func__,
  			(io_read(sd, 0x6a) & 0x01) ? "HDMI" : "DVI");
  		set_rgb_quantization_range(sd);
  		if (handled)
  			*handled = true;
  	}
  
  #if IS_ENABLED(CONFIG_VIDEO_ADV7604_CEC)
  	/* cec */
  	adv76xx_cec_isr(sd, handled);
  #endif
  
  	/* tx 5v detect */
  	tx_5v = irq_reg_0x70 & info->cable_det_mask;
  	if (tx_5v) {
  		v4l2_dbg(1, debug, sd, "%s: tx_5v: 0x%x\n", __func__, tx_5v);
  		adv76xx_s_detect_tx_5v_ctrl(sd);
  		if (handled)
  			*handled = true;
  	}
  	return 0;
  }
  
  static int adv76xx_get_edid(struct v4l2_subdev *sd, struct v4l2_edid *edid)
  {
  	struct adv76xx_state *state = to_state(sd);
  	u8 *data = NULL;
  
  	memset(edid->reserved, 0, sizeof(edid->reserved));
  
  	switch (edid->pad) {
  	case ADV76XX_PAD_HDMI_PORT_A:
  	case ADV7604_PAD_HDMI_PORT_B:
  	case ADV7604_PAD_HDMI_PORT_C:
  	case ADV7604_PAD_HDMI_PORT_D:
  		if (state->edid.present & (1 << edid->pad))
  			data = state->edid.edid;
  		break;
  	default:
  		return -EINVAL;
  	}
  
  	if (edid->start_block == 0 && edid->blocks == 0) {
  		edid->blocks = data ? state->edid.blocks : 0;
  		return 0;
  	}
  
  	if (!data)
  		return -ENODATA;
  
  	if (edid->start_block >= state->edid.blocks)
  		return -EINVAL;
  
  	if (edid->start_block + edid->blocks > state->edid.blocks)
  		edid->blocks = state->edid.blocks - edid->start_block;
  
  	memcpy(edid->edid, data + edid->start_block * 128, edid->blocks * 128);
  
  	return 0;
  }
  
  static int adv76xx_set_edid(struct v4l2_subdev *sd, struct v4l2_edid *edid)
  {
  	struct adv76xx_state *state = to_state(sd);
  	const struct adv76xx_chip_info *info = state->info;
  	unsigned int spa_loc;
  	u16 pa;
  	int err;
  	int i;
  
  	memset(edid->reserved, 0, sizeof(edid->reserved));
  
  	if (edid->pad > ADV7604_PAD_HDMI_PORT_D)
  		return -EINVAL;
  	if (edid->start_block != 0)
  		return -EINVAL;
  	if (edid->blocks == 0) {
  		/* Disable hotplug and I2C access to EDID RAM from DDC port */
  		state->edid.present &= ~(1 << edid->pad);
  		adv76xx_set_hpd(state, state->edid.present);
  		rep_write_clr_set(sd, info->edid_enable_reg, 0x0f, state->edid.present);
  
  		/* Fall back to a 16:9 aspect ratio */
  		state->aspect_ratio.numerator = 16;
  		state->aspect_ratio.denominator = 9;
  
  		if (!state->edid.present)
  			state->edid.blocks = 0;
  
  		v4l2_dbg(2, debug, sd, "%s: clear EDID pad %d, edid.present = 0x%x\n",
  				__func__, edid->pad, state->edid.present);
  		return 0;
  	}
  	if (edid->blocks > 2) {
  		edid->blocks = 2;
  		return -E2BIG;
  	}
  	pa = cec_get_edid_phys_addr(edid->edid, edid->blocks * 128, &spa_loc);
  	err = cec_phys_addr_validate(pa, &pa, NULL);
  	if (err)
  		return err;
  
  	v4l2_dbg(2, debug, sd, "%s: write EDID pad %d, edid.present = 0x%x\n",
  			__func__, edid->pad, state->edid.present);
  
  	/* Disable hotplug and I2C access to EDID RAM from DDC port */
  	cancel_delayed_work_sync(&state->delayed_work_enable_hotplug);
  	adv76xx_set_hpd(state, 0);
  	rep_write_clr_set(sd, info->edid_enable_reg, 0x0f, 0x00);
  
  	/*
  	 * Return an error if no location of the source physical address
  	 * was found.
  	 */
  	if (spa_loc == 0)
  		return -EINVAL;
  
  	switch (edid->pad) {
  	case ADV76XX_PAD_HDMI_PORT_A:
  		state->spa_port_a[0] = edid->edid[spa_loc];
  		state->spa_port_a[1] = edid->edid[spa_loc + 1];
  		break;
  	case ADV7604_PAD_HDMI_PORT_B:
  		rep_write(sd, 0x70, edid->edid[spa_loc]);
  		rep_write(sd, 0x71, edid->edid[spa_loc + 1]);
  		break;
  	case ADV7604_PAD_HDMI_PORT_C:
  		rep_write(sd, 0x72, edid->edid[spa_loc]);
  		rep_write(sd, 0x73, edid->edid[spa_loc + 1]);
  		break;
  	case ADV7604_PAD_HDMI_PORT_D:
  		rep_write(sd, 0x74, edid->edid[spa_loc]);
  		rep_write(sd, 0x75, edid->edid[spa_loc + 1]);
  		break;
  	default:
  		return -EINVAL;
  	}
  
  	if (info->type == ADV7604) {
  		rep_write(sd, 0x76, spa_loc & 0xff);
  		rep_write_clr_set(sd, 0x77, 0x40, (spa_loc & 0x100) >> 2);
  	} else {
  		/* ADV7612 Software Manual Rev. A, p. 15 */
  		rep_write(sd, 0x70, spa_loc & 0xff);
  		rep_write_clr_set(sd, 0x71, 0x01, (spa_loc & 0x100) >> 8);
  	}
  
  	edid->edid[spa_loc] = state->spa_port_a[0];
  	edid->edid[spa_loc + 1] = state->spa_port_a[1];
  
  	memcpy(state->edid.edid, edid->edid, 128 * edid->blocks);
  	state->edid.blocks = edid->blocks;
  	state->aspect_ratio = v4l2_calc_aspect_ratio(edid->edid[0x15],
  			edid->edid[0x16]);
  	state->edid.present |= 1 << edid->pad;
  
  	err = edid_write_block(sd, 128 * edid->blocks, state->edid.edid);
  	if (err < 0) {
  		v4l2_err(sd, "error %d writing edid pad %d\n", err, edid->pad);
  		return err;
  	}
  
  	/* adv76xx calculates the checksums and enables I2C access to internal
  	   EDID RAM from DDC port. */
  	rep_write_clr_set(sd, info->edid_enable_reg, 0x0f, state->edid.present);
  
  	for (i = 0; i < 1000; i++) {
  		if (rep_read(sd, info->edid_status_reg) & state->edid.present)
  			break;
  		mdelay(1);
  	}
  	if (i == 1000) {
  		v4l2_err(sd, "error enabling edid (0x%x)\n", state->edid.present);
  		return -EIO;
  	}
  	cec_s_phys_addr(state->cec_adap, pa, false);
  
  	/* enable hotplug after 100 ms */
  	schedule_delayed_work(&state->delayed_work_enable_hotplug, HZ / 10);
  	return 0;
  }
  
  /*********** avi info frame CEA-861-E **************/
  
  static const struct adv76xx_cfg_read_infoframe adv76xx_cri[] = {
  	{ "AVI", 0x01, 0xe0, 0x00 },
  	{ "Audio", 0x02, 0xe3, 0x1c },
  	{ "SDP", 0x04, 0xe6, 0x2a },
  	{ "Vendor", 0x10, 0xec, 0x54 }
  };
  
  static int adv76xx_read_infoframe(struct v4l2_subdev *sd, int index,
  				  union hdmi_infoframe *frame)
  {
  	uint8_t buffer[32];
  	u8 len;
  	int i;
  
  	if (!(io_read(sd, 0x60) & adv76xx_cri[index].present_mask)) {
  		v4l2_info(sd, "%s infoframe not received\n",
  			  adv76xx_cri[index].desc);
  		return -ENOENT;
  	}
  
  	for (i = 0; i < 3; i++)
  		buffer[i] = infoframe_read(sd,
  					   adv76xx_cri[index].head_addr + i);
  
  	len = buffer[2] + 1;
  
  	if (len + 3 > sizeof(buffer)) {
  		v4l2_err(sd, "%s: invalid %s infoframe length %d\n", __func__,
  			 adv76xx_cri[index].desc, len);
  		return -ENOENT;
  	}
  
  	for (i = 0; i < len; i++)
  		buffer[i + 3] = infoframe_read(sd,
  				       adv76xx_cri[index].payload_addr + i);
  
  	if (hdmi_infoframe_unpack(frame, buffer) < 0) {
  		v4l2_err(sd, "%s: unpack of %s infoframe failed\n", __func__,
  			 adv76xx_cri[index].desc);
  		return -ENOENT;
  	}
  	return 0;
  }
  
  static void adv76xx_log_infoframes(struct v4l2_subdev *sd)
  {
  	int i;
  
  	if (!is_hdmi(sd)) {
  		v4l2_info(sd, "receive DVI-D signal, no infoframes\n");
  		return;
  	}
  
  	for (i = 0; i < ARRAY_SIZE(adv76xx_cri); i++) {
  		union hdmi_infoframe frame;
  		struct i2c_client *client = v4l2_get_subdevdata(sd);
  
  		if (adv76xx_read_infoframe(sd, i, &frame))
  			return;
  		hdmi_infoframe_log(KERN_INFO, &client->dev, &frame);
  	}
  }
  
  static int adv76xx_log_status(struct v4l2_subdev *sd)
  {
  	struct adv76xx_state *state = to_state(sd);
  	const struct adv76xx_chip_info *info = state->info;
  	struct v4l2_dv_timings timings;
  	struct stdi_readback stdi;
  	u8 reg_io_0x02 = io_read(sd, 0x02);
  	u8 edid_enabled;
  	u8 cable_det;
  
  	static const char * const 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"
  	};
  	static const char * const 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"
  	};
  	static const char * const hdmi_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)",
  		"sYCC", "Adobe YCC 601", "AdobeRGB", "invalid", "invalid",
  		"invalid", "invalid", "invalid"
  	};
  	static const char * const rgb_quantization_range_txt[] = {
  		"Automatic",
  		"RGB limited range (16-235)",
  		"RGB full range (0-255)",
  	};
  	static const char * const 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");
  	edid_enabled = rep_read(sd, info->edid_status_reg);
  	v4l2_info(sd, "EDID enabled port A: %s, B: %s, C: %s, D: %s\n",
  			((edid_enabled & 0x01) ? "Yes" : "No"),
  			((edid_enabled & 0x02) ? "Yes" : "No"),
  			((edid_enabled & 0x04) ? "Yes" : "No"),
  			((edid_enabled & 0x08) ? "Yes" : "No"));
  	v4l2_info(sd, "CEC: %s\n", state->cec_enabled_adap ?
  			"enabled" : "disabled");
  	if (state->cec_enabled_adap) {
  		int i;
  
  		for (i = 0; i < ADV76XX_MAX_ADDRS; i++) {
  			bool is_valid = state->cec_valid_addrs & (1 << i);
  
  			if (is_valid)
  				v4l2_info(sd, "CEC Logical Address: 0x%x\n",
  					  state->cec_addr[i]);
  		}
  	}
  
  	v4l2_info(sd, "-----Signal status-----\n");
  	cable_det = info->read_cable_det(sd);
  	v4l2_info(sd, "Cable detected (+5V power) port A: %s, B: %s, C: %s, D: %s\n",
  			((cable_det & 0x01) ? "Yes" : "No"),
  			((cable_det & 0x02) ? "Yes" : "No"),
  			((cable_det & 0x04) ? "Yes" : "No"),
  			((cable_det & 0x08) ? "Yes" : "No"));
  	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",
  			(in_free_run(sd)) ? "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 (adv76xx_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, alt-gamma %s\n",
  			(reg_io_0x02 & 0x02) ? "RGB" : "YCbCr",
  			(((reg_io_0x02 >> 2) & 0x01) ^ (reg_io_0x02 & 0x01)) ?
  				"(16-235)" : "(0-255)",
  			(reg_io_0x02 & 0x08) ? "enabled" : "disabled");
  	v4l2_info(sd, "Color space conversion: %s\n",
  			csc_coeff_sel_rb[cp_read(sd, info->cp_csc) >> 4]);
  
  	if (!is_digital_input(sd))
  		return 0;
  
  	v4l2_info(sd, "-----%s status-----\n", is_hdmi(sd) ? "HDMI" : "DVI-D");
  	v4l2_info(sd, "Digital video port selected: %c\n",
  			(hdmi_read(sd, 0x00) & 0x03) + 'A');
  	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]);
  		v4l2_info(sd, "HDMI colorspace: %s\n", hdmi_color_space_txt[hdmi_read(sd, 0x53) & 0xf]);
  
  		adv76xx_log_infoframes(sd);
  	}
  
  	return 0;
  }
  
  static int adv76xx_subscribe_event(struct v4l2_subdev *sd,
  				   struct v4l2_fh *fh,
  				   struct v4l2_event_subscription *sub)
  {
  	switch (sub->type) {
  	case V4L2_EVENT_SOURCE_CHANGE:
  		return v4l2_src_change_event_subdev_subscribe(sd, fh, sub);
  	case V4L2_EVENT_CTRL:
  		return v4l2_ctrl_subdev_subscribe_event(sd, fh, sub);
  	default:
  		return -EINVAL;
  	}
  }
  
  static int adv76xx_registered(struct v4l2_subdev *sd)
  {
  	struct adv76xx_state *state = to_state(sd);
  	struct i2c_client *client = v4l2_get_subdevdata(sd);
  	int err;
  
  	err = cec_register_adapter(state->cec_adap, &client->dev);
  	if (err)
  		cec_delete_adapter(state->cec_adap);
  	return err;
  }
  
  static void adv76xx_unregistered(struct v4l2_subdev *sd)
  {
  	struct adv76xx_state *state = to_state(sd);
  
  	cec_unregister_adapter(state->cec_adap);
  }
  
  /* ----------------------------------------------------------------------- */
  
  static const struct v4l2_ctrl_ops adv76xx_ctrl_ops = {
  	.s_ctrl = adv76xx_s_ctrl,
  	.g_volatile_ctrl = adv76xx_g_volatile_ctrl,
  };
  
  static const struct v4l2_subdev_core_ops adv76xx_core_ops = {
  	.log_status = adv76xx_log_status,
  	.interrupt_service_routine = adv76xx_isr,
  	.subscribe_event = adv76xx_subscribe_event,
  	.unsubscribe_event = v4l2_event_subdev_unsubscribe,
  #ifdef CONFIG_VIDEO_ADV_DEBUG
  	.g_register = adv76xx_g_register,
  	.s_register = adv76xx_s_register,
  #endif
  };
  
  static const struct v4l2_subdev_video_ops adv76xx_video_ops = {
  	.s_routing = adv76xx_s_routing,
  	.g_input_status = adv76xx_g_input_status,
  	.s_dv_timings = adv76xx_s_dv_timings,
  	.g_dv_timings = adv76xx_g_dv_timings,
  	.query_dv_timings = adv76xx_query_dv_timings,
  };
  
  static const struct v4l2_subdev_pad_ops adv76xx_pad_ops = {
  	.enum_mbus_code = adv76xx_enum_mbus_code,
  	.get_selection = adv76xx_get_selection,
  	.get_fmt = adv76xx_get_format,
  	.set_fmt = adv76xx_set_format,
  	.get_edid = adv76xx_get_edid,
  	.set_edid = adv76xx_set_edid,
  	.dv_timings_cap = adv76xx_dv_timings_cap,
  	.enum_dv_timings = adv76xx_enum_dv_timings,
  };
  
  static const struct v4l2_subdev_ops adv76xx_ops = {
  	.core = &adv76xx_core_ops,
  	.video = &adv76xx_video_ops,
  	.pad = &adv76xx_pad_ops,
  };
  
  static const struct v4l2_subdev_internal_ops adv76xx_int_ops = {
  	.registered = adv76xx_registered,
  	.unregistered = adv76xx_unregistered,
  };
  
  /* -------------------------- custom ctrls ---------------------------------- */
  
  static const struct v4l2_ctrl_config adv7604_ctrl_analog_sampling_phase = {
  	.ops = &adv76xx_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 adv76xx_ctrl_free_run_color_manual = {
  	.ops = &adv76xx_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 adv76xx_ctrl_free_run_color = {
  	.ops = &adv76xx_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,
  };
  
  /* ----------------------------------------------------------------------- */
  
  struct adv76xx_register_map {
  	const char *name;
  	u8 default_addr;
  };
  
  static const struct adv76xx_register_map adv76xx_default_addresses[] = {
  	[ADV76XX_PAGE_IO] = { "main", 0x4c },
  	[ADV7604_PAGE_AVLINK] = { "avlink", 0x42 },
  	[ADV76XX_PAGE_CEC] = { "cec", 0x40 },
  	[ADV76XX_PAGE_INFOFRAME] = { "infoframe", 0x3e },
  	[ADV7604_PAGE_ESDP] = { "esdp", 0x38 },
  	[ADV7604_PAGE_DPP] = { "dpp", 0x3c },
  	[ADV76XX_PAGE_AFE] = { "afe", 0x26 },
  	[ADV76XX_PAGE_REP] = { "rep", 0x32 },
  	[ADV76XX_PAGE_EDID] = { "edid", 0x36 },
  	[ADV76XX_PAGE_HDMI] = { "hdmi", 0x34 },
  	[ADV76XX_PAGE_TEST] = { "test", 0x30 },
  	[ADV76XX_PAGE_CP] = { "cp", 0x22 },
  	[ADV7604_PAGE_VDP] = { "vdp", 0x24 },
  };
  
  static int adv76xx_core_init(struct v4l2_subdev *sd)
  {
  	struct adv76xx_state *state = to_state(sd);
  	const struct adv76xx_chip_info *info = state->info;
  	struct adv76xx_platform_data *pdata = &state->pdata;
  
  	hdmi_write(sd, 0x48,
  		(pdata->disable_pwrdnb ? 0x80 : 0) |
  		(pdata->disable_cable_det_rst ? 0x40 : 0));
  
  	disable_input(sd);
  
  	if (pdata->default_input >= 0 &&
  	    pdata->default_input < state->source_pad) {
  		state->selected_input = pdata->default_input;
  		select_input(sd);
  		enable_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_clr_set(sd, 0x02, 0x0f, pdata->alt_gamma << 3);
  	io_write_clr_set(sd, 0x05, 0x0e, pdata->blank_data << 3 |
  			pdata->insert_av_codes << 2 |
  			pdata->replicate_av_codes << 1);
  	adv76xx_setup_format(state);
  
  	cp_write(sd, 0x69, 0x30);   /* Enable CP CSC */
  
  	/* VS, HS polarities */
  	io_write(sd, 0x06, 0xa0 | pdata->inv_vs_pol << 2 |
  		 pdata->inv_hs_pol << 1 | pdata->inv_llc_pol);
  
  	/* Adjust drive strength */
  	io_write(sd, 0x14, 0x40 | pdata->dr_str_data << 4 |
  				pdata->dr_str_clk << 2 |
  				pdata->dr_str_sync);
  
  	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 */
  
  	/* HDMI audio */
  	hdmi_write_clr_set(sd, 0x15, 0x03, 0x03); /* Mute on FIFO over-/underflow [REF_01, c. 1.2.18] */
  	hdmi_write_clr_set(sd, 0x1a, 0x0e, 0x08); /* Wait 1 s before unmute */
  	hdmi_write_clr_set(sd, 0x68, 0x06, 0x06); /* FIFO reset on over-/underflow [REF_01, c. 1.2.19] */
  
  	/* TODO from platform data */
  	afe_write(sd, 0xb5, 0x01);  /* Setting MCLK to 256Fs */
  
  	if (adv76xx_has_afe(state)) {
  		afe_write(sd, 0x02, pdata->ain_sel); /* Select analog input muxing mode */
  		io_write_clr_set(sd, 0x30, 1 << 4, pdata->output_bus_lsb_to_msb << 4);
  	}
  
  	/* interrupts */
  	io_write(sd, 0x40, 0xc0 | pdata->int1_config); /* Configure INT1 */
  	io_write(sd, 0x46, 0x98); /* Enable SSPD, STDI and CP unlocked interrupts */
  	io_write(sd, 0x6e, info->fmt_change_digital_mask); /* Enable V_LOCKED and DE_REGEN_LCK interrupts */
  	io_write(sd, 0x73, info->cable_det_mask); /* Enable cable detection (+5v) interrupts */
  	info->setup_irqs(sd);
  
  	return v4l2_ctrl_handler_setup(sd->ctrl_handler);
  }
  
  static void adv7604_setup_irqs(struct v4l2_subdev *sd)
  {
  	io_write(sd, 0x41, 0xd7); /* STDI irq for any change, disable INT2 */
  }
  
  static void adv7611_setup_irqs(struct v4l2_subdev *sd)
  {
  	io_write(sd, 0x41, 0xd0); /* STDI irq for any change, disable INT2 */
  }
  
  static void adv7612_setup_irqs(struct v4l2_subdev *sd)
  {
  	io_write(sd, 0x41, 0xd0); /* disable INT2 */
  }
  
  static void adv76xx_unregister_clients(struct adv76xx_state *state)
  {
  	unsigned int i;
  
  	for (i = 1; i < ARRAY_SIZE(state->i2c_clients); ++i) {
  		if (state->i2c_clients[i])
  			i2c_unregister_device(state->i2c_clients[i]);
  	}
  }
  
  static struct i2c_client *adv76xx_dummy_client(struct v4l2_subdev *sd,
  					       unsigned int page)
  {
  	struct i2c_client *client = v4l2_get_subdevdata(sd);
  	struct adv76xx_state *state = to_state(sd);
  	struct adv76xx_platform_data *pdata = &state->pdata;
  	unsigned int io_reg = 0xf2 + page;
  	struct i2c_client *new_client;
  
  	if (pdata && pdata->i2c_addresses[page])
  		new_client = i2c_new_dummy(client->adapter,
  					   pdata->i2c_addresses[page]);
  	else
  		new_client = i2c_new_secondary_device(client,
  				adv76xx_default_addresses[page].name,
  				adv76xx_default_addresses[page].default_addr);
  
  	if (new_client)
  		io_write(sd, io_reg, new_client->addr << 1);
  
  	return new_client;
  }
  
  static const struct adv76xx_reg_seq adv7604_recommended_settings_afe[] = {
  	/* reset ADI recommended settings for HDMI: */
  	/* "ADV7604 Register Settings Recommendations (rev. 2.5, June 2010)" p. 4. */
  	{ ADV76XX_REG(ADV76XX_PAGE_HDMI, 0x0d), 0x04 }, /* HDMI filter optimization */
  	{ ADV76XX_REG(ADV76XX_PAGE_HDMI, 0x0d), 0x04 }, /* HDMI filter optimization */
  	{ ADV76XX_REG(ADV76XX_PAGE_HDMI, 0x3d), 0x00 }, /* DDC bus active pull-up control */
  	{ ADV76XX_REG(ADV76XX_PAGE_HDMI, 0x3e), 0x74 }, /* TMDS PLL optimization */
  	{ ADV76XX_REG(ADV76XX_PAGE_HDMI, 0x4e), 0x3b }, /* TMDS PLL optimization */
  	{ ADV76XX_REG(ADV76XX_PAGE_HDMI, 0x57), 0x74 }, /* TMDS PLL optimization */
  	{ ADV76XX_REG(ADV76XX_PAGE_HDMI, 0x58), 0x63 }, /* TMDS PLL optimization */
  	{ ADV76XX_REG(ADV76XX_PAGE_HDMI, 0x8d), 0x18 }, /* equaliser */
  	{ ADV76XX_REG(ADV76XX_PAGE_HDMI, 0x8e), 0x34 }, /* equaliser */
  	{ ADV76XX_REG(ADV76XX_PAGE_HDMI, 0x93), 0x88 }, /* equaliser */
  	{ ADV76XX_REG(ADV76XX_PAGE_HDMI, 0x94), 0x2e }, /* equaliser */
  	{ ADV76XX_REG(ADV76XX_PAGE_HDMI, 0x96), 0x00 }, /* enable automatic EQ changing */
  
  	/* set ADI recommended settings for digitizer */
  	/* "ADV7604 Register Settings Recommendations (rev. 2.5, June 2010)" p. 17. */
  	{ ADV76XX_REG(ADV76XX_PAGE_AFE, 0x12), 0x7b }, /* ADC noise shaping filter controls */
  	{ ADV76XX_REG(ADV76XX_PAGE_AFE, 0x0c), 0x1f }, /* CP core gain controls */
  	{ ADV76XX_REG(ADV76XX_PAGE_CP, 0x3e), 0x04 }, /* CP core pre-gain control */
  	{ ADV76XX_REG(ADV76XX_PAGE_CP, 0xc3), 0x39 }, /* CP coast control. Graphics mode */
  	{ ADV76XX_REG(ADV76XX_PAGE_CP, 0x40), 0x5c }, /* CP core pre-gain control. Graphics mode */
  
  	{ ADV76XX_REG_SEQ_TERM, 0 },
  };
  
  static const struct adv76xx_reg_seq adv7604_recommended_settings_hdmi[] = {
  	/* set ADI recommended settings for HDMI: */
  	/* "ADV7604 Register Settings Recommendations (rev. 2.5, June 2010)" p. 4. */
  	{ ADV76XX_REG(ADV76XX_PAGE_HDMI, 0x0d), 0x84 }, /* HDMI filter optimization */
  	{ ADV76XX_REG(ADV76XX_PAGE_HDMI, 0x3d), 0x10 }, /* DDC bus active pull-up control */
  	{ ADV76XX_REG(ADV76XX_PAGE_HDMI, 0x3e), 0x39 }, /* TMDS PLL optimization */
  	{ ADV76XX_REG(ADV76XX_PAGE_HDMI, 0x4e), 0x3b }, /* TMDS PLL optimization */
  	{ ADV76XX_REG(ADV76XX_PAGE_HDMI, 0x57), 0xb6 }, /* TMDS PLL optimization */
  	{ ADV76XX_REG(ADV76XX_PAGE_HDMI, 0x58), 0x03 }, /* TMDS PLL optimization */
  	{ ADV76XX_REG(ADV76XX_PAGE_HDMI, 0x8d), 0x18 }, /* equaliser */
  	{ ADV76XX_REG(ADV76XX_PAGE_HDMI, 0x8e), 0x34 }, /* equaliser */
  	{ ADV76XX_REG(ADV76XX_PAGE_HDMI, 0x93), 0x8b }, /* equaliser */
  	{ ADV76XX_REG(ADV76XX_PAGE_HDMI, 0x94), 0x2d }, /* equaliser */
  	{ ADV76XX_REG(ADV76XX_PAGE_HDMI, 0x96), 0x01 }, /* enable automatic EQ changing */
  
  	/* reset ADI recommended settings for digitizer */
  	/* "ADV7604 Register Settings Recommendations (rev. 2.5, June 2010)" p. 17. */
  	{ ADV76XX_REG(ADV76XX_PAGE_AFE, 0x12), 0xfb }, /* ADC noise shaping filter controls */
  	{ ADV76XX_REG(ADV76XX_PAGE_AFE, 0x0c), 0x0d }, /* CP core gain controls */
  
  	{ ADV76XX_REG_SEQ_TERM, 0 },
  };
  
  static const struct adv76xx_reg_seq adv7611_recommended_settings_hdmi[] = {
  	/* ADV7611 Register Settings Recommendations Rev 1.5, May 2014 */
  	{ ADV76XX_REG(ADV76XX_PAGE_CP, 0x6c), 0x00 },
  	{ ADV76XX_REG(ADV76XX_PAGE_HDMI, 0x9b), 0x03 },
  	{ ADV76XX_REG(ADV76XX_PAGE_HDMI, 0x6f), 0x08 },
  	{ ADV76XX_REG(ADV76XX_PAGE_HDMI, 0x85), 0x1f },
  	{ ADV76XX_REG(ADV76XX_PAGE_HDMI, 0x87), 0x70 },
  	{ ADV76XX_REG(ADV76XX_PAGE_HDMI, 0x57), 0xda },
  	{ ADV76XX_REG(ADV76XX_PAGE_HDMI, 0x58), 0x01 },
  	{ ADV76XX_REG(ADV76XX_PAGE_HDMI, 0x03), 0x98 },
  	{ ADV76XX_REG(ADV76XX_PAGE_HDMI, 0x4c), 0x44 },
  	{ ADV76XX_REG(ADV76XX_PAGE_HDMI, 0x8d), 0x04 },
  	{ ADV76XX_REG(ADV76XX_PAGE_HDMI, 0x8e), 0x1e },
  
  	{ ADV76XX_REG_SEQ_TERM, 0 },
  };
  
  static const struct adv76xx_reg_seq adv7612_recommended_settings_hdmi[] = {
  	{ ADV76XX_REG(ADV76XX_PAGE_CP, 0x6c), 0x00 },
  	{ ADV76XX_REG(ADV76XX_PAGE_HDMI, 0x9b), 0x03 },
  	{ ADV76XX_REG(ADV76XX_PAGE_HDMI, 0x6f), 0x08 },
  	{ ADV76XX_REG(ADV76XX_PAGE_HDMI, 0x85), 0x1f },
  	{ ADV76XX_REG(ADV76XX_PAGE_HDMI, 0x87), 0x70 },
  	{ ADV76XX_REG(ADV76XX_PAGE_HDMI, 0x57), 0xda },
  	{ ADV76XX_REG(ADV76XX_PAGE_HDMI, 0x58), 0x01 },
  	{ ADV76XX_REG(ADV76XX_PAGE_HDMI, 0x03), 0x98 },
  	{ ADV76XX_REG(ADV76XX_PAGE_HDMI, 0x4c), 0x44 },
  	{ ADV76XX_REG_SEQ_TERM, 0 },
  };
  
  static const struct adv76xx_chip_info adv76xx_chip_info[] = {
  	[ADV7604] = {
  		.type = ADV7604,
  		.has_afe = true,
  		.max_port = ADV7604_PAD_VGA_COMP,
  		.num_dv_ports = 4,
  		.edid_enable_reg = 0x77,
  		.edid_status_reg = 0x7d,
  		.lcf_reg = 0xb3,
  		.tdms_lock_mask = 0xe0,
  		.cable_det_mask = 0x1e,
  		.fmt_change_digital_mask = 0xc1,
  		.cp_csc = 0xfc,
  		.formats = adv7604_formats,
  		.nformats = ARRAY_SIZE(adv7604_formats),
  		.set_termination = adv7604_set_termination,
  		.setup_irqs = adv7604_setup_irqs,
  		.read_hdmi_pixelclock = adv7604_read_hdmi_pixelclock,
  		.read_cable_det = adv7604_read_cable_det,
  		.recommended_settings = {
  		    [0] = adv7604_recommended_settings_afe,
  		    [1] = adv7604_recommended_settings_hdmi,
  		},
  		.num_recommended_settings = {
  		    [0] = ARRAY_SIZE(adv7604_recommended_settings_afe),
  		    [1] = ARRAY_SIZE(adv7604_recommended_settings_hdmi),
  		},
  		.page_mask = BIT(ADV76XX_PAGE_IO) | BIT(ADV7604_PAGE_AVLINK) |
  			BIT(ADV76XX_PAGE_CEC) | BIT(ADV76XX_PAGE_INFOFRAME) |
  			BIT(ADV7604_PAGE_ESDP) | BIT(ADV7604_PAGE_DPP) |
  			BIT(ADV76XX_PAGE_AFE) | BIT(ADV76XX_PAGE_REP) |
  			BIT(ADV76XX_PAGE_EDID) | BIT(ADV76XX_PAGE_HDMI) |
  			BIT(ADV76XX_PAGE_TEST) | BIT(ADV76XX_PAGE_CP) |
  			BIT(ADV7604_PAGE_VDP),
  		.linewidth_mask = 0xfff,
  		.field0_height_mask = 0xfff,
  		.field1_height_mask = 0xfff,
  		.hfrontporch_mask = 0x3ff,
  		.hsync_mask = 0x3ff,
  		.hbackporch_mask = 0x3ff,
  		.field0_vfrontporch_mask = 0x1fff,
  		.field0_vsync_mask = 0x1fff,
  		.field0_vbackporch_mask = 0x1fff,
  		.field1_vfrontporch_mask = 0x1fff,
  		.field1_vsync_mask = 0x1fff,
  		.field1_vbackporch_mask = 0x1fff,
  	},
  	[ADV7611] = {
  		.type = ADV7611,
  		.has_afe = false,
  		.max_port = ADV76XX_PAD_HDMI_PORT_A,
  		.num_dv_ports = 1,
  		.edid_enable_reg = 0x74,
  		.edid_status_reg = 0x76,
  		.lcf_reg = 0xa3,
  		.tdms_lock_mask = 0x43,
  		.cable_det_mask = 0x01,
  		.fmt_change_digital_mask = 0x03,
  		.cp_csc = 0xf4,
  		.formats = adv7611_formats,
  		.nformats = ARRAY_SIZE(adv7611_formats),
  		.set_termination = adv7611_set_termination,
  		.setup_irqs = adv7611_setup_irqs,
  		.read_hdmi_pixelclock = adv7611_read_hdmi_pixelclock,
  		.read_cable_det = adv7611_read_cable_det,
  		.recommended_settings = {
  		    [1] = adv7611_recommended_settings_hdmi,
  		},
  		.num_recommended_settings = {
  		    [1] = ARRAY_SIZE(adv7611_recommended_settings_hdmi),
  		},
  		.page_mask = BIT(ADV76XX_PAGE_IO) | BIT(ADV76XX_PAGE_CEC) |
  			BIT(ADV76XX_PAGE_INFOFRAME) | BIT(ADV76XX_PAGE_AFE) |
  			BIT(ADV76XX_PAGE_REP) |  BIT(ADV76XX_PAGE_EDID) |
  			BIT(ADV76XX_PAGE_HDMI) | BIT(ADV76XX_PAGE_CP),
  		.linewidth_mask = 0x1fff,
  		.field0_height_mask = 0x1fff,
  		.field1_height_mask = 0x1fff,
  		.hfrontporch_mask = 0x1fff,
  		.hsync_mask = 0x1fff,
  		.hbackporch_mask = 0x1fff,
  		.field0_vfrontporch_mask = 0x3fff,
  		.field0_vsync_mask = 0x3fff,
  		.field0_vbackporch_mask = 0x3fff,
  		.field1_vfrontporch_mask = 0x3fff,
  		.field1_vsync_mask = 0x3fff,
  		.field1_vbackporch_mask = 0x3fff,
  	},
  	[ADV7612] = {
  		.type = ADV7612,
  		.has_afe = false,
  		.max_port = ADV76XX_PAD_HDMI_PORT_A,	/* B not supported */
  		.num_dv_ports = 1,			/* normally 2 */
  		.edid_enable_reg = 0x74,
  		.edid_status_reg = 0x76,
  		.lcf_reg = 0xa3,
  		.tdms_lock_mask = 0x43,
  		.cable_det_mask = 0x01,
  		.fmt_change_digital_mask = 0x03,
  		.cp_csc = 0xf4,
  		.formats = adv7612_formats,
  		.nformats = ARRAY_SIZE(adv7612_formats),
  		.set_termination = adv7611_set_termination,
  		.setup_irqs = adv7612_setup_irqs,
  		.read_hdmi_pixelclock = adv7611_read_hdmi_pixelclock,
  		.read_cable_det = adv7612_read_cable_det,
  		.recommended_settings = {
  		    [1] = adv7612_recommended_settings_hdmi,
  		},
  		.num_recommended_settings = {
  		    [1] = ARRAY_SIZE(adv7612_recommended_settings_hdmi),
  		},
  		.page_mask = BIT(ADV76XX_PAGE_IO) | BIT(ADV76XX_PAGE_CEC) |
  			BIT(ADV76XX_PAGE_INFOFRAME) | BIT(ADV76XX_PAGE_AFE) |
  			BIT(ADV76XX_PAGE_REP) |  BIT(ADV76XX_PAGE_EDID) |
  			BIT(ADV76XX_PAGE_HDMI) | BIT(ADV76XX_PAGE_CP),
  		.linewidth_mask = 0x1fff,
  		.field0_height_mask = 0x1fff,
  		.field1_height_mask = 0x1fff,
  		.hfrontporch_mask = 0x1fff,
  		.hsync_mask = 0x1fff,
  		.hbackporch_mask = 0x1fff,
  		.field0_vfrontporch_mask = 0x3fff,
  		.field0_vsync_mask = 0x3fff,
  		.field0_vbackporch_mask = 0x3fff,
  		.field1_vfrontporch_mask = 0x3fff,
  		.field1_vsync_mask = 0x3fff,
  		.field1_vbackporch_mask = 0x3fff,
  	},
  };
  
  static const struct i2c_device_id adv76xx_i2c_id[] = {
  	{ "adv7604", (kernel_ulong_t)&adv76xx_chip_info[ADV7604] },
  	{ "adv7611", (kernel_ulong_t)&adv76xx_chip_info[ADV7611] },
  	{ "adv7612", (kernel_ulong_t)&adv76xx_chip_info[ADV7612] },
  	{ }
  };
  MODULE_DEVICE_TABLE(i2c, adv76xx_i2c_id);
  
  static const struct of_device_id adv76xx_of_id[] __maybe_unused = {
  	{ .compatible = "adi,adv7611", .data = &adv76xx_chip_info[ADV7611] },
  	{ .compatible = "adi,adv7612", .data = &adv76xx_chip_info[ADV7612] },
  	{ }
  };
  MODULE_DEVICE_TABLE(of, adv76xx_of_id);
  
  static int adv76xx_parse_dt(struct adv76xx_state *state)
  {
  	struct v4l2_fwnode_endpoint bus_cfg;
  	struct device_node *endpoint;
  	struct device_node *np;
  	unsigned int flags;
  	int ret;
  	u32 v;
  
  	np = state->i2c_clients[ADV76XX_PAGE_IO]->dev.of_node;
  
  	/* Parse the endpoint. */
  	endpoint = of_graph_get_next_endpoint(np, NULL);
  	if (!endpoint)
  		return -EINVAL;
  
  	ret = v4l2_fwnode_endpoint_parse(of_fwnode_handle(endpoint), &bus_cfg);
  	of_node_put(endpoint);
  	if (ret)
  		return ret;
  
  	if (!of_property_read_u32(np, "default-input", &v))
  		state->pdata.default_input = v;
  	else
  		state->pdata.default_input = -1;
  
  	flags = bus_cfg.bus.parallel.flags;
  
  	if (flags & V4L2_MBUS_HSYNC_ACTIVE_HIGH)
  		state->pdata.inv_hs_pol = 1;
  
  	if (flags & V4L2_MBUS_VSYNC_ACTIVE_HIGH)
  		state->pdata.inv_vs_pol = 1;
  
  	if (flags & V4L2_MBUS_PCLK_SAMPLE_RISING)
  		state->pdata.inv_llc_pol = 1;
  
  	if (bus_cfg.bus_type == V4L2_MBUS_BT656)
  		state->pdata.insert_av_codes = 1;
  
  	/* Disable the interrupt for now as no DT-based board uses it. */
  	state->pdata.int1_config = ADV76XX_INT1_CONFIG_DISABLED;
  
  	/* Hardcode the remaining platform data fields. */
  	state->pdata.disable_pwrdnb = 0;
  	state->pdata.disable_cable_det_rst = 0;
  	state->pdata.blank_data = 1;
  	state->pdata.op_format_mode_sel = ADV7604_OP_FORMAT_MODE0;
  	state->pdata.bus_order = ADV7604_BUS_ORDER_RGB;
  	state->pdata.dr_str_data = ADV76XX_DR_STR_MEDIUM_HIGH;
  	state->pdata.dr_str_clk = ADV76XX_DR_STR_MEDIUM_HIGH;
  	state->pdata.dr_str_sync = ADV76XX_DR_STR_MEDIUM_HIGH;
  
  	return 0;
  }
  
  static const struct regmap_config adv76xx_regmap_cnf[] = {
  	{
  		.name			= "io",
  		.reg_bits		= 8,
  		.val_bits		= 8,
  
  		.max_register		= 0xff,
  		.cache_type		= REGCACHE_NONE,
  	},
  	{
  		.name			= "avlink",
  		.reg_bits		= 8,
  		.val_bits		= 8,
  
  		.max_register		= 0xff,
  		.cache_type		= REGCACHE_NONE,
  	},
  	{
  		.name			= "cec",
  		.reg_bits		= 8,
  		.val_bits		= 8,
  
  		.max_register		= 0xff,
  		.cache_type		= REGCACHE_NONE,
  	},
  	{
  		.name			= "infoframe",
  		.reg_bits		= 8,
  		.val_bits		= 8,
  
  		.max_register		= 0xff,
  		.cache_type		= REGCACHE_NONE,
  	},
  	{
  		.name			= "esdp",
  		.reg_bits		= 8,
  		.val_bits		= 8,
  
  		.max_register		= 0xff,
  		.cache_type		= REGCACHE_NONE,
  	},
  	{
  		.name			= "epp",
  		.reg_bits		= 8,
  		.val_bits		= 8,
  
  		.max_register		= 0xff,
  		.cache_type		= REGCACHE_NONE,
  	},
  	{
  		.name			= "afe",
  		.reg_bits		= 8,
  		.val_bits		= 8,
  
  		.max_register		= 0xff,
  		.cache_type		= REGCACHE_NONE,
  	},
  	{
  		.name			= "rep",
  		.reg_bits		= 8,
  		.val_bits		= 8,
  
  		.max_register		= 0xff,
  		.cache_type		= REGCACHE_NONE,
  	},
  	{
  		.name			= "edid",
  		.reg_bits		= 8,
  		.val_bits		= 8,
  
  		.max_register		= 0xff,
  		.cache_type		= REGCACHE_NONE,
  	},
  
  	{
  		.name			= "hdmi",
  		.reg_bits		= 8,
  		.val_bits		= 8,
  
  		.max_register		= 0xff,
  		.cache_type		= REGCACHE_NONE,
  	},
  	{
  		.name			= "test",
  		.reg_bits		= 8,
  		.val_bits		= 8,
  
  		.max_register		= 0xff,
  		.cache_type		= REGCACHE_NONE,
  	},
  	{
  		.name			= "cp",
  		.reg_bits		= 8,
  		.val_bits		= 8,
  
  		.max_register		= 0xff,
  		.cache_type		= REGCACHE_NONE,
  	},
  	{
  		.name			= "vdp",
  		.reg_bits		= 8,
  		.val_bits		= 8,
  
  		.max_register		= 0xff,
  		.cache_type		= REGCACHE_NONE,
  	},
  };
  
  static int configure_regmap(struct adv76xx_state *state, int region)
  {
  	int err;
  
  	if (!state->i2c_clients[region])
  		return -ENODEV;
  
  	state->regmap[region] =
  		devm_regmap_init_i2c(state->i2c_clients[region],
  				     &adv76xx_regmap_cnf[region]);
  
  	if (IS_ERR(state->regmap[region])) {
  		err = PTR_ERR(state->regmap[region]);
  		v4l_err(state->i2c_clients[region],
  			"Error initializing regmap %d with error %d\n",
  			region, err);
  		return -EINVAL;
  	}
  
  	return 0;
  }
  
  static int configure_regmaps(struct adv76xx_state *state)
  {
  	int i, err;
  
  	for (i = ADV7604_PAGE_AVLINK ; i < ADV76XX_PAGE_MAX; i++) {
  		err = configure_regmap(state, i);
  		if (err && (err != -ENODEV))
  			return err;
  	}
  	return 0;
  }
  
  static void adv76xx_reset(struct adv76xx_state *state)
  {
  	if (state->reset_gpio) {
  		/* ADV76XX can be reset by a low reset pulse of minimum 5 ms. */
  		gpiod_set_value_cansleep(state->reset_gpio, 0);
  		usleep_range(5000, 10000);
  		gpiod_set_value_cansleep(state->reset_gpio, 1);
  		/* It is recommended to wait 5 ms after the low pulse before */
  		/* an I2C write is performed to the ADV76XX. */
  		usleep_range(5000, 10000);
  	}
  }
  
  static int adv76xx_probe(struct i2c_client *client,
  			 const struct i2c_device_id *id)
  {
  	static const struct v4l2_dv_timings cea640x480 =
  		V4L2_DV_BT_CEA_640X480P59_94;
  	struct adv76xx_state *state;
  	struct v4l2_ctrl_handler *hdl;
  	struct v4l2_ctrl *ctrl;
  	struct v4l2_subdev *sd;
  	unsigned int i;
  	unsigned int val, val2;
  	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 adv76xx client on address 0x%x\n",
  			client->addr << 1);
  
  	state = devm_kzalloc(&client->dev, sizeof(*state), GFP_KERNEL);
  	if (!state)
  		return -ENOMEM;
  
  	state->i2c_clients[ADV76XX_PAGE_IO] = client;
  
  	/* initialize variables */
  	state->restart_stdi_once = true;
  	state->selected_input = ~0;
  
  	if (IS_ENABLED(CONFIG_OF) && client->dev.of_node) {
  		const struct of_device_id *oid;
  
  		oid = of_match_node(adv76xx_of_id, client->dev.of_node);
  		state->info = oid->data;
  
  		err = adv76xx_parse_dt(state);
  		if (err < 0) {
  			v4l_err(client, "DT parsing error\n");
  			return err;
  		}
  	} else if (client->dev.platform_data) {
  		struct adv76xx_platform_data *pdata = client->dev.platform_data;
  
  		state->info = (const struct adv76xx_chip_info *)id->driver_data;
  		state->pdata = *pdata;
  	} else {
  		v4l_err(client, "No platform data!\n");
  		return -ENODEV;
  	}
  
  	/* Request GPIOs. */
  	for (i = 0; i < state->info->num_dv_ports; ++i) {
  		state->hpd_gpio[i] =
  			devm_gpiod_get_index_optional(&client->dev, "hpd", i,
  						      GPIOD_OUT_LOW);
  		if (IS_ERR(state->hpd_gpio[i]))
  			return PTR_ERR(state->hpd_gpio[i]);
  
  		if (state->hpd_gpio[i])
  			v4l_info(client, "Handling HPD %u GPIO\n", i);
  	}
  	state->reset_gpio = devm_gpiod_get_optional(&client->dev, "reset",
  								GPIOD_OUT_HIGH);
  	if (IS_ERR(state->reset_gpio))
  		return PTR_ERR(state->reset_gpio);
  
  	adv76xx_reset(state);
  
  	state->timings = cea640x480;
  	state->format = adv76xx_format_info(state, MEDIA_BUS_FMT_YUYV8_2X8);
  
  	sd = &state->sd;
  	v4l2_i2c_subdev_init(sd, client, &adv76xx_ops);
  	snprintf(sd->name, sizeof(sd->name), "%s %d-%04x",
  		id->name, i2c_adapter_id(client->adapter),
  		client->addr);
  	sd->flags |= V4L2_SUBDEV_FL_HAS_DEVNODE | V4L2_SUBDEV_FL_HAS_EVENTS;
  	sd->internal_ops = &adv76xx_int_ops;
  
  	/* Configure IO Regmap region */
  	err = configure_regmap(state, ADV76XX_PAGE_IO);
  
  	if (err) {
  		v4l2_err(sd, "Error configuring IO regmap region\n");
  		return -ENODEV;
  	}
  
  	/*
  	 * Verify that the chip is present. On ADV7604 the RD_INFO register only
  	 * identifies the revision, while on ADV7611 it identifies the model as
  	 * well. Use the HDMI slave address on ADV7604 and RD_INFO on ADV7611.
  	 */
  	switch (state->info->type) {
  	case ADV7604:
  		err = regmap_read(state->regmap[ADV76XX_PAGE_IO], 0xfb, &val);
  		if (err) {
  			v4l2_err(sd, "Error %d reading IO Regmap\n", err);
  			return -ENODEV;
  		}
  		if (val != 0x68) {
  			v4l2_err(sd, "not an adv7604 on address 0x%x\n",
  					client->addr << 1);
  			return -ENODEV;
  		}
  		break;
  	case ADV7611:
  	case ADV7612:
  		err = regmap_read(state->regmap[ADV76XX_PAGE_IO],
  				0xea,
  				&val);
  		if (err) {
  			v4l2_err(sd, "Error %d reading IO Regmap\n", err);
  			return -ENODEV;
  		}
  		val2 = val << 8;
  		err = regmap_read(state->regmap[ADV76XX_PAGE_IO],
  			    0xeb,
  			    &val);
  		if (err) {
  			v4l2_err(sd, "Error %d reading IO Regmap\n", err);
  			return -ENODEV;
  		}
  		val |= val2;
  		if ((state->info->type == ADV7611 && val != 0x2051) ||
  			(state->info->type == ADV7612 && val != 0x2041)) {
  			v4l2_err(sd, "not an adv761x on address 0x%x\n",
  					client->addr << 1);
  			return -ENODEV;
  		}
  		break;
  	}
  
  	/* control handlers */
  	hdl = &state->hdl;
  	v4l2_ctrl_handler_init(hdl, adv76xx_has_afe(state) ? 9 : 8);
  
  	v4l2_ctrl_new_std(hdl, &adv76xx_ctrl_ops,
  			V4L2_CID_BRIGHTNESS, -128, 127, 1, 0);
  	v4l2_ctrl_new_std(hdl, &adv76xx_ctrl_ops,
  			V4L2_CID_CONTRAST, 0, 255, 1, 128);
  	v4l2_ctrl_new_std(hdl, &adv76xx_ctrl_ops,
  			V4L2_CID_SATURATION, 0, 255, 1, 128);
  	v4l2_ctrl_new_std(hdl, &adv76xx_ctrl_ops,
  			V4L2_CID_HUE, 0, 128, 1, 0);
  	ctrl = v4l2_ctrl_new_std_menu(hdl, &adv76xx_ctrl_ops,
  			V4L2_CID_DV_RX_IT_CONTENT_TYPE, V4L2_DV_IT_CONTENT_TYPE_NO_ITC,
  			0, V4L2_DV_IT_CONTENT_TYPE_NO_ITC);
  	if (ctrl)
  		ctrl->flags |= V4L2_CTRL_FLAG_VOLATILE;
  
  	state->detect_tx_5v_ctrl = v4l2_ctrl_new_std(hdl, NULL,
  			V4L2_CID_DV_RX_POWER_PRESENT, 0,
  			(1 << state->info->num_dv_ports) - 1, 0, 0);
  	state->rgb_quantization_range_ctrl =
  		v4l2_ctrl_new_std_menu(hdl, &adv76xx_ctrl_ops,
  			V4L2_CID_DV_RX_RGB_RANGE, V4L2_DV_RGB_RANGE_FULL,
  			0, V4L2_DV_RGB_RANGE_AUTO);
  
  	/* custom controls */
  	if (adv76xx_has_afe(state))
  		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, &adv76xx_ctrl_free_run_color_manual, NULL);
  	state->free_run_color_ctrl =
  		v4l2_ctrl_new_custom(hdl, &adv76xx_ctrl_free_run_color, NULL);
  
  	sd->ctrl_handler = hdl;
  	if (hdl->error) {
  		err = hdl->error;
  		goto err_hdl;
  	}
  	if (adv76xx_s_detect_tx_5v_ctrl(sd)) {
  		err = -ENODEV;
  		goto err_hdl;
  	}
  
  	for (i = 1; i < ADV76XX_PAGE_MAX; ++i) {
  		if (!(BIT(i) & state->info->page_mask))
  			continue;
  
  		state->i2c_clients[i] = adv76xx_dummy_client(sd, i);
  		if (!state->i2c_clients[i]) {
  			err = -EINVAL;
  			v4l2_err(sd, "failed to create i2c client %u\n", i);
  			goto err_i2c;
  		}
  	}
  
  	INIT_DELAYED_WORK(&state->delayed_work_enable_hotplug,
  			adv76xx_delayed_work_enable_hotplug);
  
  	state->source_pad = state->info->num_dv_ports
  			  + (state->info->has_afe ? 2 : 0);
  	for (i = 0; i < state->source_pad; ++i)
  		state->pads[i].flags = MEDIA_PAD_FL_SINK;
  	state->pads[state->source_pad].flags = MEDIA_PAD_FL_SOURCE;
  	sd->entity.function = MEDIA_ENT_F_DV_DECODER;
  
  	err = media_entity_pads_init(&sd->entity, state->source_pad + 1,
  				state->pads);
  	if (err)
  		goto err_work_queues;
  
  	/* Configure regmaps */
  	err = configure_regmaps(state);
  	if (err)
  		goto err_entity;
  
  	err = adv76xx_core_init(sd);
  	if (err)
  		goto err_entity;
  
  #if IS_ENABLED(CONFIG_VIDEO_ADV7604_CEC)
  	state->cec_adap = cec_allocate_adapter(&adv76xx_cec_adap_ops,
  		state, dev_name(&client->dev),
  		CEC_CAP_DEFAULTS, ADV76XX_MAX_ADDRS);
  	err = PTR_ERR_OR_ZERO(state->cec_adap);
  	if (err)
  		goto err_entity;
  #endif
  
  	v4l2_info(sd, "%s found @ 0x%x (%s)\n", client->name,
  			client->addr << 1, client->adapter->name);
  
  	err = v4l2_async_register_subdev(sd);
  	if (err)
  		goto err_entity;
  
  	return 0;
  
  err_entity:
  	media_entity_cleanup(&sd->entity);
  err_work_queues:
  	cancel_delayed_work(&state->delayed_work_enable_hotplug);
  err_i2c:
  	adv76xx_unregister_clients(state);
  err_hdl:
  	v4l2_ctrl_handler_free(hdl);
  	return err;
  }
  
  /* ----------------------------------------------------------------------- */
  
  static int adv76xx_remove(struct i2c_client *client)
  {
  	struct v4l2_subdev *sd = i2c_get_clientdata(client);
  	struct adv76xx_state *state = to_state(sd);
  
  	/* disable interrupts */
  	io_write(sd, 0x40, 0);
  	io_write(sd, 0x41, 0);
  	io_write(sd, 0x46, 0);
  	io_write(sd, 0x6e, 0);
  	io_write(sd, 0x73, 0);
  
  	cancel_delayed_work(&state->delayed_work_enable_hotplug);
  	v4l2_async_unregister_subdev(sd);
  	media_entity_cleanup(&sd->entity);
  	adv76xx_unregister_clients(to_state(sd));
  	v4l2_ctrl_handler_free(sd->ctrl_handler);
  	return 0;
  }
  
  /* ----------------------------------------------------------------------- */
  
  static struct i2c_driver adv76xx_driver = {
  	.driver = {
  		.name = "adv7604",
  		.of_match_table = of_match_ptr(adv76xx_of_id),
  	},
  	.probe = adv76xx_probe,
  	.remove = adv76xx_remove,
  	.id_table = adv76xx_i2c_id,
  };
  
  module_i2c_driver(adv76xx_driver);
  