Quelle  bios_parser2.c   Sprache: C

/*
 * Copyright 2012-15 Advanced Micro Devices, Inc.
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation
 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
 * and/or sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
 * OTHER DEALINGS IN THE SOFTWARE.
 *
 * Authors: AMD
 *
 */

#include "dm_services.h"
#include "core_types.h"

#include "ObjectID.h"
#include "atomfirmware.h"

#include "dc_bios_types.h"
#include "include/grph_object_ctrl_defs.h"
#include "include/bios_parser_interface.h"
#include "include/logger_interface.h"

#include "command_table2.h"

#include "bios_parser_helper.h"
#include "command_table_helper2.h"
#include "bios_parser2.h"
#include "bios_parser_types_internal2.h"
#include "bios_parser_interface.h"

#include "bios_parser_common.h"

#define DC_LOGGER \
 bp->base.ctx->logger

#define LAST_RECORD_TYPE 0xff
#define SMU9_SYSPLL0_ID  0

static enum bp_result get_gpio_i2c_info(struct bios_parser *bp,
 struct atom_i2c_record *record,
 struct graphics_object_i2c_info *info);

static enum bp_result bios_parser_get_firmware_info(
 struct dc_bios *dcb,
 struct dc_firmware_info *info);

static enum bp_result bios_parser_get_encoder_cap_info(
 struct dc_bios *dcb,
 struct graphics_object_id object_id,
 struct bp_encoder_cap_info *info);

static enum bp_result get_firmware_info_v3_1(
 struct bios_parser *bp,
 struct dc_firmware_info *info);

static enum bp_result get_firmware_info_v3_2(
 struct bios_parser *bp,
 struct dc_firmware_info *info);

static enum bp_result get_firmware_info_v3_4(
 struct bios_parser *bp,
 struct dc_firmware_info *info);

static enum bp_result get_firmware_info_v3_5(
 struct bios_parser *bp,
 struct dc_firmware_info *info);

static struct atom_hpd_int_record *get_hpd_record(struct bios_parser *bp,
  struct atom_display_object_path_v2 *object);

static struct atom_encoder_caps_record *get_encoder_cap_record(
 struct bios_parser *bp,
 struct atom_display_object_path_v2 *object);

#define BIOS_IMAGE_SIZE_OFFSET 2
#define BIOS_IMAGE_SIZE_UNIT 512

#define DATA_TABLES(table) (bp->master_data_tbl->listOfdatatables.table)

static void bios_parser2_destruct(struct bios_parser *bp)
{
 kfree(bp->base.bios_local_image);
 kfree(bp->base.integrated_info);
}

static void firmware_parser_destroy(struct dc_bios **dcb)
{
 struct bios_parser *bp = BP_FROM_DCB(*dcb);

 if (!bp) {
  BREAK_TO_DEBUGGER();
  return;
 }

 bios_parser2_destruct(bp);

 kfree(bp);
 *dcb = NULL;
}

static void get_atom_data_table_revision(
 struct atom_common_table_header *atom_data_tbl,
 struct atom_data_revision *tbl_revision)
{
 if (!tbl_revision)
  return;

 /* initialize the revision to 0 which is invalid revision */
 tbl_revision->major = 0;
 tbl_revision->minor = 0;

 if (!atom_data_tbl)
  return;

 tbl_revision->major =
   (uint32_t) atom_data_tbl->format_revision & 0x3f;
 tbl_revision->minor =
   (uint32_t) atom_data_tbl->content_revision & 0x3f;
}

/* BIOS oject table displaypath is per connector.
 * There is extra path not for connector. BIOS fill its encoderid as 0
 */
static uint8_t bios_parser_get_connectors_number(struct dc_bios *dcb)
{
 struct bios_parser *bp = BP_FROM_DCB(dcb);
 unsigned int count = 0;
 unsigned int i;

 switch (bp->object_info_tbl.revision.minor) {
 default:
 case 4:
  for (i = 0; i < bp->object_info_tbl.v1_4->number_of_path; i++)
   if (bp->object_info_tbl.v1_4->display_path[i].encoderobjid != 0)
    count++;

  break;

 case 5:
  for (i = 0; i < bp->object_info_tbl.v1_5->number_of_path; i++)
   if (bp->object_info_tbl.v1_5->display_path[i].encoderobjid != 0)
    count++;

  break;
 }
 return count;
}

static struct graphics_object_id bios_parser_get_connector_id(
 struct dc_bios *dcb,
 uint8_t i)
{
 struct bios_parser *bp = BP_FROM_DCB(dcb);
 struct graphics_object_id object_id = dal_graphics_object_id_init(
  0, ENUM_ID_UNKNOWN, OBJECT_TYPE_UNKNOWN);
 struct object_info_table *tbl = &bp->object_info_tbl;
 struct display_object_info_table_v1_4 *v1_4 = tbl->v1_4;

 struct display_object_info_table_v1_5 *v1_5 = tbl->v1_5;

 switch (bp->object_info_tbl.revision.minor) {
 default:
 case 4:
  if (v1_4->number_of_path > i) {
   /* If display_objid is generic object id,  the encoderObj
 * /extencoderobjId should be 0
 */
   if (v1_4->display_path[i].encoderobjid != 0 &&
       v1_4->display_path[i].display_objid != 0)
    object_id = object_id_from_bios_object_id(
     v1_4->display_path[i].display_objid);
  }
  break;

 case 5:
  if (v1_5->number_of_path > i) {
   /* If display_objid is generic object id,  the encoderObjId
 * should be 0
 */
   if (v1_5->display_path[i].encoderobjid != 0 &&
       v1_5->display_path[i].display_objid != 0)
    object_id = object_id_from_bios_object_id(
     v1_5->display_path[i].display_objid);
  }
  break;
 }
 return object_id;
}

static enum bp_result bios_parser_get_src_obj(struct dc_bios *dcb,
 struct graphics_object_id object_id, uint32_t index,
 struct graphics_object_id *src_object_id)
{
 struct bios_parser *bp = BP_FROM_DCB(dcb);
 unsigned int i;
 enum bp_result bp_result = BP_RESULT_BADINPUT;
 struct graphics_object_id obj_id = { 0 };
 struct object_info_table *tbl = &bp->object_info_tbl;

 if (!src_object_id)
  return bp_result;

 switch (object_id.type) {
 /* Encoder's Source is GPU.  BIOS does not provide GPU, since all
 * displaypaths point to same GPU (0x1100).  Hardcode GPU object type
 */
 case OBJECT_TYPE_ENCODER:
  /* TODO: since num of src must be less than 2.
 * If found in for loop, should break.
 * DAL2 implementation may be changed too
 */
  switch (bp->object_info_tbl.revision.minor) {
  default:
  case 4:
   for (i = 0; i < tbl->v1_4->number_of_path; i++) {
    obj_id = object_id_from_bios_object_id(
     tbl->v1_4->display_path[i].encoderobjid);
    if (object_id.type == obj_id.type &&
        object_id.id == obj_id.id &&
        object_id.enum_id == obj_id.enum_id) {
     *src_object_id =
      object_id_from_bios_object_id(
       0x1100);
     /* break; */
    }
   }
   bp_result = BP_RESULT_OK;
   break;

  case 5:
   for (i = 0; i < tbl->v1_5->number_of_path; i++) {
    obj_id = object_id_from_bios_object_id(
     tbl->v1_5->display_path[i].encoderobjid);
    if (object_id.type == obj_id.type &&
        object_id.id == obj_id.id &&
        object_id.enum_id == obj_id.enum_id) {
     *src_object_id =
      object_id_from_bios_object_id(
       0x1100);
     /* break; */
    }
   }
   bp_result = BP_RESULT_OK;
   break;
  }
  break;
 case OBJECT_TYPE_CONNECTOR:
  switch (bp->object_info_tbl.revision.minor) {
  default:
  case 4:
   for (i = 0; i < tbl->v1_4->number_of_path; i++) {
    obj_id = object_id_from_bios_object_id(
     tbl->v1_4->display_path[i]
      .display_objid);

    if (object_id.type == obj_id.type &&
        object_id.id == obj_id.id &&
        object_id.enum_id == obj_id.enum_id) {
     *src_object_id =
      object_id_from_bios_object_id(
       tbl->v1_4
        ->display_path[i]
        .encoderobjid);
     /* break; */
    }
   }
   bp_result = BP_RESULT_OK;
   break;
  }
  bp_result = BP_RESULT_OK;
  break;
  case 5:
   for (i = 0; i < tbl->v1_5->number_of_path; i++) {
    obj_id = object_id_from_bios_object_id(
               tbl->v1_5->display_path[i].display_objid);

    if (object_id.type == obj_id.type &&
        object_id.id == obj_id.id &&
        object_id.enum_id == obj_id.enum_id) {
     *src_object_id = object_id_from_bios_object_id(
                 tbl->v1_5->display_path[i].encoderobjid);
     /* break; */
    }
   }
  bp_result = BP_RESULT_OK;
  break;

 default:
  bp_result = BP_RESULT_OK;
  break;
 }

 return bp_result;
}

/* from graphics_object_id, find display path which includes the object_id */
static struct atom_display_object_path_v2 *get_bios_object(
  struct bios_parser *bp,
  struct graphics_object_id id)
{
 unsigned int i;
 struct graphics_object_id obj_id = {0};

 switch (id.type) {
 case OBJECT_TYPE_ENCODER:
  for (i = 0; i < bp->object_info_tbl.v1_4->number_of_path; i++) {
   obj_id = object_id_from_bios_object_id(
     bp->object_info_tbl.v1_4->display_path[i].encoderobjid);
   if (id.type == obj_id.type && id.id == obj_id.id
     && id.enum_id == obj_id.enum_id)
    return &bp->object_info_tbl.v1_4->display_path[i];
  }
  fallthrough;
 case OBJECT_TYPE_CONNECTOR:
 case OBJECT_TYPE_GENERIC:
  /* Both Generic and Connector Object ID
 * will be stored on display_objid
 */
  for (i = 0; i < bp->object_info_tbl.v1_4->number_of_path; i++) {
   obj_id = object_id_from_bios_object_id(
     bp->object_info_tbl.v1_4->display_path[i].display_objid);
   if (id.type == obj_id.type && id.id == obj_id.id
     && id.enum_id == obj_id.enum_id)
    return &bp->object_info_tbl.v1_4->display_path[i];
  }
  fallthrough;
 default:
  return NULL;
 }
}

/* from graphics_object_id, find display path which includes the object_id */
static struct atom_display_object_path_v3 *get_bios_object_from_path_v3(struct bios_parser *bp,
         struct graphics_object_id id)
{
 unsigned int i;
 struct graphics_object_id obj_id = {0};

 switch (id.type) {
 case OBJECT_TYPE_ENCODER:
  for (i = 0; i < bp->object_info_tbl.v1_5->number_of_path; i++) {
   obj_id = object_id_from_bios_object_id(
     bp->object_info_tbl.v1_5->display_path[i].encoderobjid);
   if (id.type == obj_id.type && id.id == obj_id.id
     && id.enum_id == obj_id.enum_id)
    return &bp->object_info_tbl.v1_5->display_path[i];
  }
 break;

 case OBJECT_TYPE_CONNECTOR:
 case OBJECT_TYPE_GENERIC:
  /* Both Generic and Connector Object ID
 * will be stored on display_objid
 */
  for (i = 0; i < bp->object_info_tbl.v1_5->number_of_path; i++) {
   obj_id = object_id_from_bios_object_id(
     bp->object_info_tbl.v1_5->display_path[i].display_objid);
   if (id.type == obj_id.type && id.id == obj_id.id
     && id.enum_id == obj_id.enum_id)
    return &bp->object_info_tbl.v1_5->display_path[i];
  }
 break;

 default:
  return NULL;
 }

 return NULL;
}

static enum bp_result bios_parser_get_i2c_info(struct dc_bios *dcb,
 struct graphics_object_id id,
 struct graphics_object_i2c_info *info)
{
 uint32_t offset;
 struct atom_display_object_path_v2 *object;

 struct atom_display_object_path_v3 *object_path_v3;

 struct atom_common_record_header *header;
 struct atom_i2c_record *record;
 struct atom_i2c_record dummy_record = {0};
 struct bios_parser *bp = BP_FROM_DCB(dcb);

 if (!info)
  return BP_RESULT_BADINPUT;

 if (id.type == OBJECT_TYPE_GENERIC) {
  dummy_record.i2c_id = id.id;

  if (get_gpio_i2c_info(bp, &dummy_record, info) == BP_RESULT_OK)
   return BP_RESULT_OK;
  else
   return BP_RESULT_NORECORD;
 }

 switch (bp->object_info_tbl.revision.minor) {
 case 4:
 default:
  object = get_bios_object(bp, id);

  if (!object)
   return BP_RESULT_BADINPUT;

  offset = object->disp_recordoffset + bp->object_info_tbl_offset;
  break;
 case 5:
  object_path_v3 = get_bios_object_from_path_v3(bp, id);

  if (!object_path_v3)
   return BP_RESULT_BADINPUT;

  offset = object_path_v3->disp_recordoffset + bp->object_info_tbl_offset;
  break;
 }

 for (;;) {
  header = GET_IMAGE(struct atom_common_record_header, offset);

  if (!header)
   return BP_RESULT_BADBIOSTABLE;

  if (header->record_type == LAST_RECORD_TYPE ||
   !header->record_size)
   break;

  if (header->record_type == ATOM_I2C_RECORD_TYPE
   && sizeof(struct atom_i2c_record) <=
       header->record_size) {
   /* get the I2C info */
   record = (struct atom_i2c_record *) header;

   if (get_gpio_i2c_info(bp, record, info) ==
        BP_RESULT_OK)
    return BP_RESULT_OK;
  }

  offset += header->record_size;
 }

 return BP_RESULT_NORECORD;
}

static enum bp_result get_gpio_i2c_info(
 struct bios_parser *bp,
 struct atom_i2c_record *record,
 struct graphics_object_i2c_info *info)
{
 struct atom_gpio_pin_lut_v2_1 *header;
 uint32_t count = 0;
 unsigned int table_index = 0;
 bool find_valid = false;
 struct atom_gpio_pin_assignment *pin;

 if (!info)
  return BP_RESULT_BADINPUT;

 /* get the GPIO_I2C info */
 if (!DATA_TABLES(gpio_pin_lut))
  return BP_RESULT_BADBIOSTABLE;

 header = GET_IMAGE(struct atom_gpio_pin_lut_v2_1,
     DATA_TABLES(gpio_pin_lut));
 if (!header)
  return BP_RESULT_BADBIOSTABLE;

 if (sizeof(struct atom_common_table_header) +
   sizeof(struct atom_gpio_pin_assignment) >
   le16_to_cpu(header->table_header.structuresize))
  return BP_RESULT_BADBIOSTABLE;

 /* TODO: is version change? */
 if (header->table_header.content_revision != 1)
  return BP_RESULT_UNSUPPORTED;

 /* get data count */
 count = (le16_to_cpu(header->table_header.structuresize)
   - sizeof(struct atom_common_table_header))
    / sizeof(struct atom_gpio_pin_assignment);

 pin = (struct atom_gpio_pin_assignment *) header->gpio_pin;

 for (table_index = 0; table_index < count; table_index++) {
  if (((record->i2c_id & I2C_HW_CAP)     == (pin->gpio_id & I2C_HW_CAP)) &&
      ((record->i2c_id & I2C_HW_ENGINE_ID_MASK) == (pin->gpio_id & I2C_HW_ENGINE_ID_MASK)) &&
      ((record->i2c_id & I2C_HW_LANE_MUX)   == (pin->gpio_id & I2C_HW_LANE_MUX))) {
   /* still valid */
   find_valid = true;
   break;
  }
  pin = (struct atom_gpio_pin_assignment *)((uint8_t *)pin + sizeof(struct atom_gpio_pin_assignment));
 }

 /* If we don't find the entry that we are looking for then
 *  we will return BP_Result_BadBiosTable.
 */
 if (find_valid == false)
  return BP_RESULT_BADBIOSTABLE;

 /* get the GPIO_I2C_INFO */
 info->i2c_hw_assist = (record->i2c_id & I2C_HW_CAP) ? true : false;
 info->i2c_line = record->i2c_id & I2C_HW_LANE_MUX;
 info->i2c_engine_id = (record->i2c_id & I2C_HW_ENGINE_ID_MASK) >> 4;
 info->i2c_slave_address = record->i2c_slave_addr;

 /* TODO: check how to get register offset for en, Y, etc. */
 info->gpio_info.clk_a_register_index = le16_to_cpu(pin->data_a_reg_index);
 info->gpio_info.clk_a_shift = pin->gpio_bitshift;

 return BP_RESULT_OK;
}

static struct atom_hpd_int_record *get_hpd_record_for_path_v3(struct bios_parser *bp,
             struct atom_display_object_path_v3 *object)
{
 struct atom_common_record_header *header;
 uint32_t offset;

 if (!object) {
  BREAK_TO_DEBUGGER(); /* Invalid object */
  return NULL;
 }

 offset = object->disp_recordoffset + bp->object_info_tbl_offset;

 for (;;) {
  header = GET_IMAGE(struct atom_common_record_header, offset);

  if (!header)
   return NULL;

  if (header->record_type == ATOM_RECORD_END_TYPE ||
   !header->record_size)
   break;

  if (header->record_type == ATOM_HPD_INT_RECORD_TYPE
   && sizeof(struct atom_hpd_int_record) <=
       header->record_size)
   return (struct atom_hpd_int_record *) header;

  offset += header->record_size;
 }

 return NULL;
}

static enum bp_result bios_parser_get_hpd_info(
 struct dc_bios *dcb,
 struct graphics_object_id id,
 struct graphics_object_hpd_info *info)
{
 struct bios_parser *bp = BP_FROM_DCB(dcb);
 struct atom_display_object_path_v2 *object;
 struct atom_display_object_path_v3 *object_path_v3;
 struct atom_hpd_int_record *record = NULL;

 if (!info)
  return BP_RESULT_BADINPUT;

 switch (bp->object_info_tbl.revision.minor) {
 case 4:
 default:
  object = get_bios_object(bp, id);

  if (!object)
   return BP_RESULT_BADINPUT;

  record = get_hpd_record(bp, object);
  break;
 case 5:
  object_path_v3 = get_bios_object_from_path_v3(bp, id);

  if (!object_path_v3)
   return BP_RESULT_BADINPUT;

  record = get_hpd_record_for_path_v3(bp, object_path_v3);
  break;
 }

 if (record != NULL) {
  info->hpd_int_gpio_uid = record->pin_id;
  info->hpd_active = record->plugin_pin_state;
  return BP_RESULT_OK;
 }

 return BP_RESULT_NORECORD;
}

static struct atom_hpd_int_record *get_hpd_record(
 struct bios_parser *bp,
 struct atom_display_object_path_v2 *object)
{
 struct atom_common_record_header *header;
 uint32_t offset;

 if (!object) {
  BREAK_TO_DEBUGGER(); /* Invalid object */
  return NULL;
 }

 offset = le16_to_cpu(object->disp_recordoffset)
   + bp->object_info_tbl_offset;

 for (;;) {
  header = GET_IMAGE(struct atom_common_record_header, offset);

  if (!header)
   return NULL;

  if (header->record_type == LAST_RECORD_TYPE ||
   !header->record_size)
   break;

  if (header->record_type == ATOM_HPD_INT_RECORD_TYPE
   && sizeof(struct atom_hpd_int_record) <=
       header->record_size)
   return (struct atom_hpd_int_record *) header;

  offset += header->record_size;
 }

 return NULL;
}

/**
 * bios_parser_get_gpio_pin_info
 * Get GpioPin information of input gpio id
 *
 * @dcb:     pointer to the DC BIOS
 * @gpio_id: GPIO ID
 * @info:    GpioPin information structure
 * return: Bios parser result code
 * note:
 *  to get the GPIO PIN INFO, we need:
 *  1. get the GPIO_ID from other object table, see GetHPDInfo()
 *  2. in DATA_TABLE.GPIO_Pin_LUT, search all records,
 * to get the registerA  offset/mask
 */
static enum bp_result bios_parser_get_gpio_pin_info(
 struct dc_bios *dcb,
 uint32_t gpio_id,
 struct gpio_pin_info *info)
{
 struct bios_parser *bp = BP_FROM_DCB(dcb);
 struct atom_gpio_pin_lut_v2_1 *header;
 uint32_t count = 0;
 uint32_t i = 0;

 if (!DATA_TABLES(gpio_pin_lut))
  return BP_RESULT_BADBIOSTABLE;

 header = GET_IMAGE(struct atom_gpio_pin_lut_v2_1,
      DATA_TABLES(gpio_pin_lut));
 if (!header)
  return BP_RESULT_BADBIOSTABLE;

 if (sizeof(struct atom_common_table_header) +
   sizeof(struct atom_gpio_pin_assignment)
   > le16_to_cpu(header->table_header.structuresize))
  return BP_RESULT_BADBIOSTABLE;

 if (header->table_header.content_revision != 1)
  return BP_RESULT_UNSUPPORTED;

 /* Temporary hard code gpio pin info */
 count = (le16_to_cpu(header->table_header.structuresize)
   - sizeof(struct atom_common_table_header))
    / sizeof(struct atom_gpio_pin_assignment);
 for (i = 0; i < count; ++i) {
  if (header->gpio_pin[i].gpio_id != gpio_id)
   continue;

  info->offset =
   (uint32_t) le16_to_cpu(
     header->gpio_pin[i].data_a_reg_index);
  info->offset_y = info->offset + 2;
  info->offset_en = info->offset + 1;
  info->offset_mask = info->offset - 1;

  info->mask = (uint32_t) (1 <<
   header->gpio_pin[i].gpio_bitshift);
  info->mask_y = info->mask + 2;
  info->mask_en = info->mask + 1;
  info->mask_mask = info->mask - 1;

  return BP_RESULT_OK;
 }

 return BP_RESULT_NORECORD;
}

static struct device_id device_type_from_device_id(uint16_t device_id)
{

 struct device_id result_device_id;

 result_device_id.raw_device_tag = device_id;

 switch (device_id) {
 case ATOM_DISPLAY_LCD1_SUPPORT:
  result_device_id.device_type = DEVICE_TYPE_LCD;
  result_device_id.enum_id = 1;
  break;

 case ATOM_DISPLAY_LCD2_SUPPORT:
  result_device_id.device_type = DEVICE_TYPE_LCD;
  result_device_id.enum_id = 2;
  break;

 case ATOM_DISPLAY_DFP1_SUPPORT:
  result_device_id.device_type = DEVICE_TYPE_DFP;
  result_device_id.enum_id = 1;
  break;

 case ATOM_DISPLAY_DFP2_SUPPORT:
  result_device_id.device_type = DEVICE_TYPE_DFP;
  result_device_id.enum_id = 2;
  break;

 case ATOM_DISPLAY_DFP3_SUPPORT:
  result_device_id.device_type = DEVICE_TYPE_DFP;
  result_device_id.enum_id = 3;
  break;

 case ATOM_DISPLAY_DFP4_SUPPORT:
  result_device_id.device_type = DEVICE_TYPE_DFP;
  result_device_id.enum_id = 4;
  break;

 case ATOM_DISPLAY_DFP5_SUPPORT:
  result_device_id.device_type = DEVICE_TYPE_DFP;
  result_device_id.enum_id = 5;
  break;

 case ATOM_DISPLAY_DFP6_SUPPORT:
  result_device_id.device_type = DEVICE_TYPE_DFP;
  result_device_id.enum_id = 6;
  break;

 default:
  BREAK_TO_DEBUGGER(); /* Invalid device Id */
  result_device_id.device_type = DEVICE_TYPE_UNKNOWN;
  result_device_id.enum_id = 0;
 }
 return result_device_id;
}

static enum bp_result bios_parser_get_device_tag(
 struct dc_bios *dcb,
 struct graphics_object_id connector_object_id,
 uint32_t device_tag_index,
 struct connector_device_tag_info *info)
{
 struct bios_parser *bp = BP_FROM_DCB(dcb);
 struct atom_display_object_path_v2 *object;

 struct atom_display_object_path_v3 *object_path_v3;


 if (!info)
  return BP_RESULT_BADINPUT;

 switch (bp->object_info_tbl.revision.minor) {
 case 4:
 default:
         /* getBiosObject will return MXM object */
  object = get_bios_object(bp, connector_object_id);

  if (!object) {
   BREAK_TO_DEBUGGER(); /* Invalid object id */
   return BP_RESULT_BADINPUT;
  }

  info->acpi_device = 0; /* BIOS no longer provides this */
  info->dev_id = device_type_from_device_id(object->device_tag);
  break;
 case 5:
  object_path_v3 = get_bios_object_from_path_v3(bp, connector_object_id);

  if (!object_path_v3) {
   BREAK_TO_DEBUGGER(); /* Invalid object id */
   return BP_RESULT_BADINPUT;
  }
  info->acpi_device = 0; /* BIOS no longer provides this */
  info->dev_id = device_type_from_device_id(object_path_v3->device_tag);
  break;
 }

 return BP_RESULT_OK;
}

static enum bp_result get_ss_info_v4_1(
 struct bios_parser *bp,
 uint32_t id,
 uint32_t index,
 struct spread_spectrum_info *ss_info)
{
 enum bp_result result = BP_RESULT_OK;
 struct atom_display_controller_info_v4_1 *disp_cntl_tbl = NULL;
 struct atom_smu_info_v3_3 *smu_info = NULL;

 if (!ss_info)
  return BP_RESULT_BADINPUT;

 if (!DATA_TABLES(dce_info))
  return BP_RESULT_BADBIOSTABLE;

 disp_cntl_tbl =  GET_IMAGE(struct atom_display_controller_info_v4_1,
       DATA_TABLES(dce_info));
 if (!disp_cntl_tbl)
  return BP_RESULT_BADBIOSTABLE;


 ss_info->type.STEP_AND_DELAY_INFO = false;
 ss_info->spread_percentage_divider = 1000;
 /* BIOS no longer uses target clock.  Always enable for now */
 ss_info->target_clock_range = 0xffffffff;

 switch (id) {
 case AS_SIGNAL_TYPE_DVI:
  ss_info->spread_spectrum_percentage =
    disp_cntl_tbl->dvi_ss_percentage;
  ss_info->spread_spectrum_range =
    disp_cntl_tbl->dvi_ss_rate_10hz * 10;
  if (disp_cntl_tbl->dvi_ss_mode & ATOM_SS_CENTRE_SPREAD_MODE)
   ss_info->type.CENTER_MODE = true;

  DC_LOG_BIOS("AS_SIGNAL_TYPE_DVI ss_percentage: %d\n", ss_info->spread_spectrum_percentage);
  break;
 case AS_SIGNAL_TYPE_HDMI:
  ss_info->spread_spectrum_percentage =
    disp_cntl_tbl->hdmi_ss_percentage;
  ss_info->spread_spectrum_range =
    disp_cntl_tbl->hdmi_ss_rate_10hz * 10;
  if (disp_cntl_tbl->hdmi_ss_mode & ATOM_SS_CENTRE_SPREAD_MODE)
   ss_info->type.CENTER_MODE = true;

  DC_LOG_BIOS("AS_SIGNAL_TYPE_HDMI ss_percentage: %d\n", ss_info->spread_spectrum_percentage);
  break;
 /* TODO LVDS not support anymore? */
 case AS_SIGNAL_TYPE_DISPLAY_PORT:
  ss_info->spread_spectrum_percentage =
    disp_cntl_tbl->dp_ss_percentage;
  ss_info->spread_spectrum_range =
    disp_cntl_tbl->dp_ss_rate_10hz * 10;
  if (disp_cntl_tbl->dp_ss_mode & ATOM_SS_CENTRE_SPREAD_MODE)
   ss_info->type.CENTER_MODE = true;

  DC_LOG_BIOS("AS_SIGNAL_TYPE_DISPLAY_PORT ss_percentage: %d\n", ss_info->spread_spectrum_percentage);
  break;
 case AS_SIGNAL_TYPE_GPU_PLL:
  /* atom_firmware: DAL only get data from dce_info table.
 * if data within smu_info is needed for DAL, VBIOS should
 * copy it into dce_info
 */
  result = BP_RESULT_UNSUPPORTED;
  break;
 case AS_SIGNAL_TYPE_XGMI:
  smu_info =  GET_IMAGE(struct atom_smu_info_v3_3,
          DATA_TABLES(smu_info));
  if (!smu_info)
   return BP_RESULT_BADBIOSTABLE;
  DC_LOG_BIOS("gpuclk_ss_percentage (unit of 0.001 percent): %d\n", smu_info->gpuclk_ss_percentage);
  ss_info->spread_spectrum_percentage =
    smu_info->waflclk_ss_percentage;
  ss_info->spread_spectrum_range =
    smu_info->gpuclk_ss_rate_10hz * 10;
  if (smu_info->waflclk_ss_mode & ATOM_SS_CENTRE_SPREAD_MODE)
   ss_info->type.CENTER_MODE = true;

  DC_LOG_BIOS("AS_SIGNAL_TYPE_XGMI ss_percentage: %d\n", ss_info->spread_spectrum_percentage);
  break;
 default:
  result = BP_RESULT_UNSUPPORTED;
 }

 return result;
}

static enum bp_result get_ss_info_v4_2(
 struct bios_parser *bp,
 uint32_t id,
 uint32_t index,
 struct spread_spectrum_info *ss_info)
{
 enum bp_result result = BP_RESULT_OK;
 struct atom_display_controller_info_v4_2 *disp_cntl_tbl = NULL;
 struct atom_smu_info_v3_1 *smu_info = NULL;

 if (!ss_info)
  return BP_RESULT_BADINPUT;

 if (!DATA_TABLES(dce_info))
  return BP_RESULT_BADBIOSTABLE;

 if (!DATA_TABLES(smu_info))
  return BP_RESULT_BADBIOSTABLE;

 disp_cntl_tbl =  GET_IMAGE(struct atom_display_controller_info_v4_2,
       DATA_TABLES(dce_info));
 if (!disp_cntl_tbl)
  return BP_RESULT_BADBIOSTABLE;

 smu_info =  GET_IMAGE(struct atom_smu_info_v3_1, DATA_TABLES(smu_info));
 if (!smu_info)
  return BP_RESULT_BADBIOSTABLE;

 DC_LOG_BIOS("gpuclk_ss_percentage (unit of 0.001 percent): %d\n", smu_info->gpuclk_ss_percentage);
 ss_info->type.STEP_AND_DELAY_INFO = false;
 ss_info->spread_percentage_divider = 1000;
 /* BIOS no longer uses target clock.  Always enable for now */
 ss_info->target_clock_range = 0xffffffff;

 switch (id) {
 case AS_SIGNAL_TYPE_DVI:
  ss_info->spread_spectrum_percentage =
    disp_cntl_tbl->dvi_ss_percentage;
  ss_info->spread_spectrum_range =
    disp_cntl_tbl->dvi_ss_rate_10hz * 10;
  if (disp_cntl_tbl->dvi_ss_mode & ATOM_SS_CENTRE_SPREAD_MODE)
   ss_info->type.CENTER_MODE = true;

  DC_LOG_BIOS("AS_SIGNAL_TYPE_DVI ss_percentage: %d\n", ss_info->spread_spectrum_percentage);
  break;
 case AS_SIGNAL_TYPE_HDMI:
  ss_info->spread_spectrum_percentage =
    disp_cntl_tbl->hdmi_ss_percentage;
  ss_info->spread_spectrum_range =
    disp_cntl_tbl->hdmi_ss_rate_10hz * 10;
  if (disp_cntl_tbl->hdmi_ss_mode & ATOM_SS_CENTRE_SPREAD_MODE)
   ss_info->type.CENTER_MODE = true;

  DC_LOG_BIOS("AS_SIGNAL_TYPE_HDMI ss_percentage: %d\n", ss_info->spread_spectrum_percentage);
  break;
 /* TODO LVDS not support anymore? */
 case AS_SIGNAL_TYPE_DISPLAY_PORT:
  ss_info->spread_spectrum_percentage =
    smu_info->gpuclk_ss_percentage;
  ss_info->spread_spectrum_range =
    smu_info->gpuclk_ss_rate_10hz * 10;
  if (smu_info->gpuclk_ss_mode & ATOM_SS_CENTRE_SPREAD_MODE)
   ss_info->type.CENTER_MODE = true;

  DC_LOG_BIOS("AS_SIGNAL_TYPE_DISPLAY_PORT ss_percentage: %d\n", ss_info->spread_spectrum_percentage);
  break;
 case AS_SIGNAL_TYPE_GPU_PLL:
  /* atom_firmware: DAL only get data from dce_info table.
 * if data within smu_info is needed for DAL, VBIOS should
 * copy it into dce_info
 */
  result = BP_RESULT_UNSUPPORTED;
  break;
 default:
  result = BP_RESULT_UNSUPPORTED;
 }

 return result;
}

static enum bp_result get_ss_info_v4_5(
 struct bios_parser *bp,
 uint32_t id,
 uint32_t index,
 struct spread_spectrum_info *ss_info)
{
 enum bp_result result = BP_RESULT_OK;
 struct atom_display_controller_info_v4_5 *disp_cntl_tbl = NULL;

 if (!ss_info)
  return BP_RESULT_BADINPUT;

 if (!DATA_TABLES(dce_info))
  return BP_RESULT_BADBIOSTABLE;

 disp_cntl_tbl =  GET_IMAGE(struct atom_display_controller_info_v4_5,
       DATA_TABLES(dce_info));
 if (!disp_cntl_tbl)
  return BP_RESULT_BADBIOSTABLE;

 ss_info->type.STEP_AND_DELAY_INFO = false;
 ss_info->spread_percentage_divider = 1000;
 /* BIOS no longer uses target clock.  Always enable for now */
 ss_info->target_clock_range = 0xffffffff;

 switch (id) {
 case AS_SIGNAL_TYPE_DVI:
  ss_info->spread_spectrum_percentage =
    disp_cntl_tbl->dvi_ss_percentage;
  ss_info->spread_spectrum_range =
    disp_cntl_tbl->dvi_ss_rate_10hz * 10;
  if (disp_cntl_tbl->dvi_ss_mode & ATOM_SS_CENTRE_SPREAD_MODE)
   ss_info->type.CENTER_MODE = true;

  DC_LOG_BIOS("AS_SIGNAL_TYPE_DVI ss_percentage: %d\n", ss_info->spread_spectrum_percentage);
  break;
 case AS_SIGNAL_TYPE_HDMI:
  ss_info->spread_spectrum_percentage =
    disp_cntl_tbl->hdmi_ss_percentage;
  ss_info->spread_spectrum_range =
    disp_cntl_tbl->hdmi_ss_rate_10hz * 10;
  if (disp_cntl_tbl->hdmi_ss_mode & ATOM_SS_CENTRE_SPREAD_MODE)
   ss_info->type.CENTER_MODE = true;

  DC_LOG_BIOS("AS_SIGNAL_TYPE_HDMI ss_percentage: %d\n", ss_info->spread_spectrum_percentage);
  break;
 case AS_SIGNAL_TYPE_DISPLAY_PORT:
  if (bp->base.integrated_info) {
   DC_LOG_BIOS("gpuclk_ss_percentage (unit of 0.001 percent): %d\n", bp->base.integrated_info->gpuclk_ss_percentage);
   ss_info->spread_spectrum_percentage =
     bp->base.integrated_info->gpuclk_ss_percentage;
   ss_info->type.CENTER_MODE =
     bp->base.integrated_info->gpuclk_ss_type;
  } else {
   ss_info->spread_spectrum_percentage =
    disp_cntl_tbl->dp_ss_percentage;
   ss_info->spread_spectrum_range =
    disp_cntl_tbl->dp_ss_rate_10hz * 10;
   if (disp_cntl_tbl->dp_ss_mode & ATOM_SS_CENTRE_SPREAD_MODE)
    ss_info->type.CENTER_MODE = true;
  }
  DC_LOG_BIOS("AS_SIGNAL_TYPE_DISPLAY_PORT ss_percentage: %d\n", ss_info->spread_spectrum_percentage);
  break;
 case AS_SIGNAL_TYPE_GPU_PLL:
  /* atom_smu_info_v4_0 does not have fields for SS for SMU Display PLL anymore.
 * SMU Display PLL supposed to be without spread.
 * Better place for it would be in atom_display_controller_info_v4_5 table.
 */
  result = BP_RESULT_UNSUPPORTED;
  break;
 default:
  result = BP_RESULT_UNSUPPORTED;
  break;
 }

 return result;
}

/**
 * bios_parser_get_spread_spectrum_info
 * Get spread spectrum information from the ASIC_InternalSS_Info(ver 2.1 or
 * ver 3.1) or SS_Info table from the VBIOS. Currently ASIC_InternalSS_Info
 * ver 2.1 can co-exist with SS_Info table. Expect ASIC_InternalSS_Info
 * ver 3.1,
 * there is only one entry for each signal /ss id.  However, there is
 * no planning of supporting multiple spread Sprectum entry for EverGreen
 * @dcb:     pointer to the DC BIOS
 * @signal:  ASSignalType to be converted to info index
 * @index:   number of entries that match the converted info index
 * @ss_info: sprectrum information structure,
 * return: Bios parser result code
 */
static enum bp_result bios_parser_get_spread_spectrum_info(
 struct dc_bios *dcb,
 enum as_signal_type signal,
 uint32_t index,
 struct spread_spectrum_info *ss_info)
{
 struct bios_parser *bp = BP_FROM_DCB(dcb);
 enum bp_result result = BP_RESULT_UNSUPPORTED;
 struct atom_common_table_header *header;
 struct atom_data_revision tbl_revision;

 if (!ss_info) /* check for bad input */
  return BP_RESULT_BADINPUT;

 if (!DATA_TABLES(dce_info))
  return BP_RESULT_UNSUPPORTED;

 header = GET_IMAGE(struct atom_common_table_header,
      DATA_TABLES(dce_info));
 get_atom_data_table_revision(header, &tbl_revision);

 switch (tbl_revision.major) {
 case 4:
  switch (tbl_revision.minor) {
  case 1:
   return get_ss_info_v4_1(bp, signal, index, ss_info);
  case 2:
  case 3:
  case 4:
   return get_ss_info_v4_2(bp, signal, index, ss_info);
  case 5:
   return get_ss_info_v4_5(bp, signal, index, ss_info);

  default:
   ASSERT(0);
   break;
  }
  break;
 default:
  break;
 }
 /* there can not be more then one entry for SS Info table */
 return result;
}

static enum bp_result get_soc_bb_info_v4_4(
 struct bios_parser *bp,
 struct bp_soc_bb_info *soc_bb_info)
{
 enum bp_result result = BP_RESULT_OK;
 struct atom_display_controller_info_v4_4 *disp_cntl_tbl = NULL;

 if (!soc_bb_info)
  return BP_RESULT_BADINPUT;

 if (!DATA_TABLES(dce_info))
  return BP_RESULT_BADBIOSTABLE;

 if (!DATA_TABLES(smu_info))
  return BP_RESULT_BADBIOSTABLE;

 disp_cntl_tbl =  GET_IMAGE(struct atom_display_controller_info_v4_4,
       DATA_TABLES(dce_info));
 if (!disp_cntl_tbl)
  return BP_RESULT_BADBIOSTABLE;

 soc_bb_info->dram_clock_change_latency_100ns = disp_cntl_tbl->max_mclk_chg_lat;
 soc_bb_info->dram_sr_enter_exit_latency_100ns = disp_cntl_tbl->max_sr_enter_exit_lat;
 soc_bb_info->dram_sr_exit_latency_100ns = disp_cntl_tbl->max_sr_exit_lat;

 return result;
}

static enum bp_result get_soc_bb_info_v4_5(
 struct bios_parser *bp,
 struct bp_soc_bb_info *soc_bb_info)
{
 enum bp_result result = BP_RESULT_OK;
 struct atom_display_controller_info_v4_5 *disp_cntl_tbl = NULL;

 if (!soc_bb_info)
  return BP_RESULT_BADINPUT;

 if (!DATA_TABLES(dce_info))
  return BP_RESULT_BADBIOSTABLE;

 disp_cntl_tbl =  GET_IMAGE(struct atom_display_controller_info_v4_5,
       DATA_TABLES(dce_info));
 if (!disp_cntl_tbl)
  return BP_RESULT_BADBIOSTABLE;

 soc_bb_info->dram_clock_change_latency_100ns = disp_cntl_tbl->max_mclk_chg_lat;
 soc_bb_info->dram_sr_enter_exit_latency_100ns = disp_cntl_tbl->max_sr_enter_exit_lat;
 soc_bb_info->dram_sr_exit_latency_100ns = disp_cntl_tbl->max_sr_exit_lat;

 return result;
}

static enum bp_result bios_parser_get_soc_bb_info(
 struct dc_bios *dcb,
 struct bp_soc_bb_info *soc_bb_info)
{
 struct bios_parser *bp = BP_FROM_DCB(dcb);
 enum bp_result result = BP_RESULT_UNSUPPORTED;
 struct atom_common_table_header *header;
 struct atom_data_revision tbl_revision;

 if (!soc_bb_info) /* check for bad input */
  return BP_RESULT_BADINPUT;

 if (!DATA_TABLES(dce_info))
  return BP_RESULT_UNSUPPORTED;

 header = GET_IMAGE(struct atom_common_table_header,
      DATA_TABLES(dce_info));
 get_atom_data_table_revision(header, &tbl_revision);

 switch (tbl_revision.major) {
 case 4:
  switch (tbl_revision.minor) {
  case 1:
  case 2:
  case 3:
   break;
  case 4:
   result = get_soc_bb_info_v4_4(bp, soc_bb_info);
   break;
  case 5:
   result = get_soc_bb_info_v4_5(bp, soc_bb_info);
   break;
  default:
   break;
  }
  break;
 default:
  break;
 }

 return result;
}

static enum bp_result get_disp_caps_v4_1(
 struct bios_parser *bp,
 uint8_t *dce_caps)
{
 enum bp_result result = BP_RESULT_OK;
 struct atom_display_controller_info_v4_1 *disp_cntl_tbl = NULL;

 if (!dce_caps)
  return BP_RESULT_BADINPUT;

 if (!DATA_TABLES(dce_info))
  return BP_RESULT_BADBIOSTABLE;

 disp_cntl_tbl = GET_IMAGE(struct atom_display_controller_info_v4_1,
       DATA_TABLES(dce_info));

 if (!disp_cntl_tbl)
  return BP_RESULT_BADBIOSTABLE;

 *dce_caps = disp_cntl_tbl->display_caps;

 return result;
}

static enum bp_result get_disp_caps_v4_2(
 struct bios_parser *bp,
 uint8_t *dce_caps)
{
 enum bp_result result = BP_RESULT_OK;
 struct atom_display_controller_info_v4_2 *disp_cntl_tbl = NULL;

 if (!dce_caps)
  return BP_RESULT_BADINPUT;

 if (!DATA_TABLES(dce_info))
  return BP_RESULT_BADBIOSTABLE;

 disp_cntl_tbl = GET_IMAGE(struct atom_display_controller_info_v4_2,
       DATA_TABLES(dce_info));

 if (!disp_cntl_tbl)
  return BP_RESULT_BADBIOSTABLE;

 *dce_caps = disp_cntl_tbl->display_caps;

 return result;
}

static enum bp_result get_disp_caps_v4_3(
 struct bios_parser *bp,
 uint8_t *dce_caps)
{
 enum bp_result result = BP_RESULT_OK;
 struct atom_display_controller_info_v4_3 *disp_cntl_tbl = NULL;

 if (!dce_caps)
  return BP_RESULT_BADINPUT;

 if (!DATA_TABLES(dce_info))
  return BP_RESULT_BADBIOSTABLE;

 disp_cntl_tbl = GET_IMAGE(struct atom_display_controller_info_v4_3,
       DATA_TABLES(dce_info));

 if (!disp_cntl_tbl)
  return BP_RESULT_BADBIOSTABLE;

 *dce_caps = disp_cntl_tbl->display_caps;

 return result;
}

static enum bp_result get_disp_caps_v4_4(
 struct bios_parser *bp,
 uint8_t *dce_caps)
{
 enum bp_result result = BP_RESULT_OK;
 struct atom_display_controller_info_v4_4 *disp_cntl_tbl = NULL;

 if (!dce_caps)
  return BP_RESULT_BADINPUT;

 if (!DATA_TABLES(dce_info))
  return BP_RESULT_BADBIOSTABLE;

 disp_cntl_tbl = GET_IMAGE(struct atom_display_controller_info_v4_4,
       DATA_TABLES(dce_info));

 if (!disp_cntl_tbl)
  return BP_RESULT_BADBIOSTABLE;

 *dce_caps = disp_cntl_tbl->display_caps;

 return result;
}

static enum bp_result get_disp_caps_v4_5(
 struct bios_parser *bp,
 uint8_t *dce_caps)
{
 enum bp_result result = BP_RESULT_OK;
 struct atom_display_controller_info_v4_5 *disp_cntl_tbl = NULL;

 if (!dce_caps)
  return BP_RESULT_BADINPUT;

 if (!DATA_TABLES(dce_info))
  return BP_RESULT_BADBIOSTABLE;

 disp_cntl_tbl = GET_IMAGE(struct atom_display_controller_info_v4_5,
       DATA_TABLES(dce_info));

 if (!disp_cntl_tbl)
  return BP_RESULT_BADBIOSTABLE;

 *dce_caps = disp_cntl_tbl->display_caps;

 return result;
}

static enum bp_result bios_parser_get_lttpr_interop(
 struct dc_bios *dcb,
 uint8_t *dce_caps)
{
 struct bios_parser *bp = BP_FROM_DCB(dcb);
 enum bp_result result = BP_RESULT_UNSUPPORTED;
 struct atom_common_table_header *header;
 struct atom_data_revision tbl_revision;

 if (!DATA_TABLES(dce_info))
  return BP_RESULT_UNSUPPORTED;

 header = GET_IMAGE(struct atom_common_table_header,
      DATA_TABLES(dce_info));
 get_atom_data_table_revision(header, &tbl_revision);
 switch (tbl_revision.major) {
 case 4:
  switch (tbl_revision.minor) {
  case 1:
   result = get_disp_caps_v4_1(bp, dce_caps);
   *dce_caps = !!(*dce_caps & DCE_INFO_CAPS_VBIOS_LTTPR_TRANSPARENT_ENABLE);
   break;
  case 2:
   result = get_disp_caps_v4_2(bp, dce_caps);
   *dce_caps = !!(*dce_caps & DCE_INFO_CAPS_VBIOS_LTTPR_TRANSPARENT_ENABLE);
   break;
  case 3:
   result = get_disp_caps_v4_3(bp, dce_caps);
   *dce_caps = !!(*dce_caps & DCE_INFO_CAPS_VBIOS_LTTPR_TRANSPARENT_ENABLE);
   break;
  case 4:
   result = get_disp_caps_v4_4(bp, dce_caps);
   *dce_caps = !!(*dce_caps & DCE_INFO_CAPS_VBIOS_LTTPR_TRANSPARENT_ENABLE);
   break;
  case 5:
   result = get_disp_caps_v4_5(bp, dce_caps);
   *dce_caps = !!(*dce_caps & DCE_INFO_CAPS_VBIOS_LTTPR_TRANSPARENT_ENABLE);
   break;

  default:
   break;
  }
  break;
 default:
  break;
 }
 DC_LOG_BIOS("DCE_INFO_CAPS_VBIOS_LTTPR_TRANSPARENT_ENABLE: %d tbl_revision.major = %d tbl_revision.minor = %d\n", *dce_caps, tbl_revision.major, tbl_revision.minor);
 return result;
}

static enum bp_result bios_parser_get_lttpr_caps(
 struct dc_bios *dcb,
 uint8_t *dce_caps)
{
 struct bios_parser *bp = BP_FROM_DCB(dcb);
 enum bp_result result = BP_RESULT_UNSUPPORTED;
 struct atom_common_table_header *header;
 struct atom_data_revision tbl_revision;

 if (!DATA_TABLES(dce_info))
  return BP_RESULT_UNSUPPORTED;

 *dce_caps  = 0;
 header = GET_IMAGE(struct atom_common_table_header,
      DATA_TABLES(dce_info));
 get_atom_data_table_revision(header, &tbl_revision);
 switch (tbl_revision.major) {
 case 4:
  switch (tbl_revision.minor) {
  case 1:
   result = get_disp_caps_v4_1(bp, dce_caps);
   *dce_caps = !!(*dce_caps & DCE_INFO_CAPS_LTTPR_SUPPORT_ENABLE);
   break;
  case 2:
   result = get_disp_caps_v4_2(bp, dce_caps);
   *dce_caps = !!(*dce_caps & DCE_INFO_CAPS_LTTPR_SUPPORT_ENABLE);
   break;
  case 3:
   result = get_disp_caps_v4_3(bp, dce_caps);
   *dce_caps = !!(*dce_caps & DCE_INFO_CAPS_LTTPR_SUPPORT_ENABLE);
   break;
  case 4:
   result = get_disp_caps_v4_4(bp, dce_caps);
   *dce_caps = !!(*dce_caps & DCE_INFO_CAPS_LTTPR_SUPPORT_ENABLE);
   break;
  case 5:
   result = get_disp_caps_v4_5(bp, dce_caps);
   *dce_caps = !!(*dce_caps & DCE_INFO_CAPS_LTTPR_SUPPORT_ENABLE);
   break;
  default:
   break;
  }
  break;
 default:
  break;
 }
 DC_LOG_BIOS("DCE_INFO_CAPS_LTTPR_SUPPORT_ENABLE: %d tbl_revision.major = %d tbl_revision.minor = %d\n", *dce_caps, tbl_revision.major, tbl_revision.minor);
 if (dcb->ctx->dc->config.force_bios_enable_lttpr && *dce_caps == 0) {
  *dce_caps = 1;
  DC_LOG_BIOS("DCE_INFO_CAPS_VBIOS_LTTPR_TRANSPARENT_ENABLE: forced enabled");
 }
 return result;
}

static enum bp_result get_embedded_panel_info_v2_1(
  struct bios_parser *bp,
  struct embedded_panel_info *info)
{
 struct lcd_info_v2_1 *lvds;

 if (!info)
  return BP_RESULT_BADINPUT;

 if (!DATA_TABLES(lcd_info))
  return BP_RESULT_UNSUPPORTED;

 lvds = GET_IMAGE(struct lcd_info_v2_1, DATA_TABLES(lcd_info));

 if (!lvds)
  return BP_RESULT_BADBIOSTABLE;

 /* TODO: previous vv1_3, should v2_1 */
 if (!((lvds->table_header.format_revision == 2)
   && (lvds->table_header.content_revision >= 1)))
  return BP_RESULT_UNSUPPORTED;

 memset(info, 0, sizeof(struct embedded_panel_info));

 /* We need to convert from 10KHz units into KHz units */
 info->lcd_timing.pixel_clk = le16_to_cpu(lvds->lcd_timing.pixclk) * 10;
 /* usHActive does not include borders, according to VBIOS team */
 info->lcd_timing.horizontal_addressable = le16_to_cpu(lvds->lcd_timing.h_active);
 /* usHBlanking_Time includes borders, so we should really be
 * subtractingborders duing this translation, but LVDS generally
 * doesn't have borders, so we should be okay leaving this as is for
 * now.  May need to revisit if we ever have LVDS with borders
 */
 info->lcd_timing.horizontal_blanking_time = le16_to_cpu(lvds->lcd_timing.h_blanking_time);
 /* usVActive does not include borders, according to VBIOS team*/
 info->lcd_timing.vertical_addressable = le16_to_cpu(lvds->lcd_timing.v_active);
 /* usVBlanking_Time includes borders, so we should really be
 * subtracting borders duing this translation, but LVDS generally
 * doesn't have borders, so we should be okay leaving this as is for
 * now. May need to revisit if we ever have LVDS with borders
 */
 info->lcd_timing.vertical_blanking_time = le16_to_cpu(lvds->lcd_timing.v_blanking_time);
 info->lcd_timing.horizontal_sync_offset = le16_to_cpu(lvds->lcd_timing.h_sync_offset);
 info->lcd_timing.horizontal_sync_width = le16_to_cpu(lvds->lcd_timing.h_sync_width);
 info->lcd_timing.vertical_sync_offset = le16_to_cpu(lvds->lcd_timing.v_sync_offset);
 info->lcd_timing.vertical_sync_width = le16_to_cpu(lvds->lcd_timing.v_syncwidth);
 info->lcd_timing.horizontal_border = lvds->lcd_timing.h_border;
 info->lcd_timing.vertical_border = lvds->lcd_timing.v_border;

 /* not provided by VBIOS */
 info->lcd_timing.misc_info.HORIZONTAL_CUT_OFF = 0;

 info->lcd_timing.misc_info.H_SYNC_POLARITY = ~(uint32_t) (lvds->lcd_timing.miscinfo
   & ATOM_HSYNC_POLARITY);
 info->lcd_timing.misc_info.V_SYNC_POLARITY = ~(uint32_t) (lvds->lcd_timing.miscinfo
   & ATOM_VSYNC_POLARITY);

 /* not provided by VBIOS */
 info->lcd_timing.misc_info.VERTICAL_CUT_OFF = 0;

 info->lcd_timing.misc_info.H_REPLICATION_BY2 = !!(lvds->lcd_timing.miscinfo
   & ATOM_H_REPLICATIONBY2);
 info->lcd_timing.misc_info.V_REPLICATION_BY2 = !!(lvds->lcd_timing.miscinfo
   & ATOM_V_REPLICATIONBY2);
 info->lcd_timing.misc_info.COMPOSITE_SYNC = !!(lvds->lcd_timing.miscinfo
   & ATOM_COMPOSITESYNC);
 info->lcd_timing.misc_info.INTERLACE = !!(lvds->lcd_timing.miscinfo & ATOM_INTERLACE);

 /* not provided by VBIOS*/
 info->lcd_timing.misc_info.DOUBLE_CLOCK = 0;
 /* not provided by VBIOS*/
 info->ss_id = 0;

 info->realtek_eDPToLVDS = !!(lvds->dplvdsrxid == eDP_TO_LVDS_REALTEK_ID);

 return BP_RESULT_OK;
}

static enum bp_result bios_parser_get_embedded_panel_info(
  struct dc_bios *dcb,
  struct embedded_panel_info *info)
{
 struct bios_parser
 *bp = BP_FROM_DCB(dcb);
 struct atom_common_table_header *header;
 struct atom_data_revision tbl_revision;

 if (!DATA_TABLES(lcd_info))
  return BP_RESULT_FAILURE;

 header = GET_IMAGE(struct atom_common_table_header, DATA_TABLES(lcd_info));

 if (!header)
  return BP_RESULT_BADBIOSTABLE;

 get_atom_data_table_revision(header, &tbl_revision);

 switch (tbl_revision.major) {
 case 2:
  switch (tbl_revision.minor) {
  case 1:
   return get_embedded_panel_info_v2_1(bp, info);
  default:
   break;
  }
  break;
 default:
  break;
 }

 return BP_RESULT_FAILURE;
}

static uint32_t get_support_mask_for_device_id(struct device_id device_id)
{
 enum dal_device_type device_type = device_id.device_type;
 uint32_t enum_id = device_id.enum_id;

 switch (device_type) {
 case DEVICE_TYPE_LCD:
  switch (enum_id) {
  case 1:
   return ATOM_DISPLAY_LCD1_SUPPORT;
  default:
   break;
  }
  break;
 case DEVICE_TYPE_DFP:
  switch (enum_id) {
  case 1:
   return ATOM_DISPLAY_DFP1_SUPPORT;
  case 2:
   return ATOM_DISPLAY_DFP2_SUPPORT;
  case 3:
   return ATOM_DISPLAY_DFP3_SUPPORT;
  case 4:
   return ATOM_DISPLAY_DFP4_SUPPORT;
  case 5:
   return ATOM_DISPLAY_DFP5_SUPPORT;
  case 6:
   return ATOM_DISPLAY_DFP6_SUPPORT;
  default:
   break;
  }
  break;
 default:
  break;
 }

 /* Unidentified device ID, return empty support mask. */
 return 0;
}

static bool bios_parser_is_device_id_supported(
 struct dc_bios *dcb,
 struct device_id id)
{
 struct bios_parser *bp = BP_FROM_DCB(dcb);

 uint32_t mask = get_support_mask_for_device_id(id);

 switch (bp->object_info_tbl.revision.minor) {
 case 4:
 default:
  return (le16_to_cpu(bp->object_info_tbl.v1_4->supporteddevices) & mask) != 0;
  break;
 case 5:
  return (le16_to_cpu(bp->object_info_tbl.v1_5->supporteddevices) & mask) != 0;
  break;
 }
}

static uint32_t bios_parser_get_ss_entry_number(
 struct dc_bios *dcb,
 enum as_signal_type signal)
{
 /* TODO: DAL2 atomfirmware implementation does not need this.
 * why DAL3 need this?
 */
 return 1;
}

static enum bp_result bios_parser_transmitter_control(
 struct dc_bios *dcb,
 struct bp_transmitter_control *cntl)
{
 struct bios_parser *bp = BP_FROM_DCB(dcb);

 if (!bp->cmd_tbl.transmitter_control)
  return BP_RESULT_FAILURE;

 return bp->cmd_tbl.transmitter_control(bp, cntl);
}

static enum bp_result bios_parser_encoder_control(
 struct dc_bios *dcb,
 struct bp_encoder_control *cntl)
{
 struct bios_parser *bp = BP_FROM_DCB(dcb);

 if (!bp->cmd_tbl.dig_encoder_control)
  return BP_RESULT_FAILURE;

 return bp->cmd_tbl.dig_encoder_control(bp, cntl);
}

static enum bp_result bios_parser_set_pixel_clock(
 struct dc_bios *dcb,
 struct bp_pixel_clock_parameters *bp_params)
{
 struct bios_parser *bp = BP_FROM_DCB(dcb);

 if (!bp->cmd_tbl.set_pixel_clock)
  return BP_RESULT_FAILURE;

 return bp->cmd_tbl.set_pixel_clock(bp, bp_params);
}

static enum bp_result bios_parser_set_dce_clock(
 struct dc_bios *dcb,
 struct bp_set_dce_clock_parameters *bp_params)
{
 struct bios_parser *bp = BP_FROM_DCB(dcb);

 if (!bp->cmd_tbl.set_dce_clock)
  return BP_RESULT_FAILURE;

 return bp->cmd_tbl.set_dce_clock(bp, bp_params);
}

static enum bp_result bios_parser_program_crtc_timing(
 struct dc_bios *dcb,
 struct bp_hw_crtc_timing_parameters *bp_params)
{
 struct bios_parser *bp = BP_FROM_DCB(dcb);

 if (!bp->cmd_tbl.set_crtc_timing)
  return BP_RESULT_FAILURE;

 return bp->cmd_tbl.set_crtc_timing(bp, bp_params);
}

static enum bp_result bios_parser_enable_crtc(
 struct dc_bios *dcb,
 enum controller_id id,
 bool enable)
{
 struct bios_parser *bp = BP_FROM_DCB(dcb);

 if (!bp->cmd_tbl.enable_crtc)
  return BP_RESULT_FAILURE;

 return bp->cmd_tbl.enable_crtc(bp, id, enable);
}

static enum bp_result bios_parser_enable_disp_power_gating(
 struct dc_bios *dcb,
 enum controller_id controller_id,
 enum bp_pipe_control_action action)
{
 struct bios_parser *bp = BP_FROM_DCB(dcb);

 if (!bp->cmd_tbl.enable_disp_power_gating)
  return BP_RESULT_FAILURE;

 return bp->cmd_tbl.enable_disp_power_gating(bp, controller_id,
  action);
}

static enum bp_result bios_parser_enable_lvtma_control(
 struct dc_bios *dcb,
 uint8_t uc_pwr_on,
 uint8_t pwrseq_instance,
 uint8_t bypass_panel_control_wait)
{
 struct bios_parser *bp = BP_FROM_DCB(dcb);

 if (!bp->cmd_tbl.enable_lvtma_control)
  return BP_RESULT_FAILURE;

 return bp->cmd_tbl.enable_lvtma_control(bp, uc_pwr_on, pwrseq_instance, bypass_panel_control_wait);
}

static bool bios_parser_is_accelerated_mode(
 struct dc_bios *dcb)
{
 return bios_is_accelerated_mode(dcb);
}

/**
 * bios_parser_set_scratch_critical_state - update critical state bit
 *                                          in VBIOS scratch register
 *
 * @dcb:   pointer to the DC BIO
 * @state: set or reset state
 */
static void bios_parser_set_scratch_critical_state(
 struct dc_bios *dcb,
 bool state)
{
 bios_set_scratch_critical_state(dcb, state);
}

static enum bp_result bios_parser_get_firmware_info(
 struct dc_bios *dcb,
 struct dc_firmware_info *info)
{
 struct bios_parser *bp = BP_FROM_DCB(dcb);
 static enum bp_result result = BP_RESULT_BADBIOSTABLE;
 struct atom_common_table_header *header;

 struct atom_data_revision revision;

 if (info && DATA_TABLES(firmwareinfo)) {
  header = GET_IMAGE(struct atom_common_table_header,
    DATA_TABLES(firmwareinfo));
  get_atom_data_table_revision(header, &revision);
  switch (revision.major) {
  case 3:
   switch (revision.minor) {
   case 1:
    result = get_firmware_info_v3_1(bp, info);
    break;
   case 2:
   case 3:
    result = get_firmware_info_v3_2(bp, info);
    break;
   case 4:
    result = get_firmware_info_v3_4(bp, info);
    break;
   case 5:
    result = get_firmware_info_v3_5(bp, info);
    break;
   default:
    break;
   }
   break;
  default:
   break;
  }
 }

 return result;
}

static enum bp_result get_firmware_info_v3_1(
 struct bios_parser *bp,
 struct dc_firmware_info *info)
{
 struct atom_firmware_info_v3_1 *firmware_info;
 struct atom_firmware_info_v3_2 *firmware_info32;
 struct atom_display_controller_info_v4_1 *dce_info = NULL;

 if (!info)
  return BP_RESULT_BADINPUT;

 firmware_info = GET_IMAGE(struct atom_firmware_info_v3_1,
   DATA_TABLES(firmwareinfo));
 firmware_info32 = GET_IMAGE(struct atom_firmware_info_v3_2,
   DATA_TABLES(firmwareinfo));

 dce_info = GET_IMAGE(struct atom_display_controller_info_v4_1,
   DATA_TABLES(dce_info));

 if (!firmware_info || !firmware_info32 || !dce_info)
  return BP_RESULT_BADBIOSTABLE;

 memset(info, 0, sizeof(*info));

 /* Pixel clock pll information. */
  /* We need to convert from 10KHz units into KHz units */
 info->default_memory_clk = firmware_info->bootup_mclk_in10khz * 10;
 info->default_engine_clk = firmware_info->bootup_sclk_in10khz * 10;

  /* 27MHz for Vega10: */
 info->pll_info.crystal_frequency = dce_info->dce_refclk_10khz * 10;

 /* Hardcode frequency if BIOS gives no DCE Ref Clk */
 if (info->pll_info.crystal_frequency == 0)
  info->pll_info.crystal_frequency = 27000;
 /*dp_phy_ref_clk is not correct for atom_display_controller_info_v4_2, but we don't use it*/
 info->dp_phy_ref_clk     = dce_info->dpphy_refclk_10khz * 10;
 info->i2c_engine_ref_clk = dce_info->i2c_engine_refclk_10khz * 10;

 /* Get GPU PLL VCO Clock */

 if (bp->cmd_tbl.get_smu_clock_info != NULL) {
  /* VBIOS gives in 10KHz */
  info->smu_gpu_pll_output_freq =
    bp->cmd_tbl.get_smu_clock_info(bp, SMU9_SYSPLL0_ID) * 10;
 }

 /* These fields are marked as reserved in v3_1, but they appear to be populated
 * properly.
 */
 if (firmware_info32 && firmware_info32->board_i2c_feature_id == 0x2) {
  info->oem_i2c_present = true;
  info->oem_i2c_obj_id = firmware_info32->board_i2c_feature_gpio_id;
 } else {
  info->oem_i2c_present = false;
 }

 return BP_RESULT_OK;
}

static enum bp_result get_firmware_info_v3_2(
 struct bios_parser *bp,
 struct dc_firmware_info *info)
{
 struct atom_firmware_info_v3_2 *firmware_info;
 struct atom_display_controller_info_v4_1 *dce_info = NULL;
 struct atom_common_table_header *header;
 struct atom_data_revision revision;
 struct atom_smu_info_v3_2 *smu_info_v3_2 = NULL;
 struct atom_smu_info_v3_3 *smu_info_v3_3 = NULL;

 if (!info)
  return BP_RESULT_BADINPUT;

 firmware_info = GET_IMAGE(struct atom_firmware_info_v3_2,
   DATA_TABLES(firmwareinfo));

 dce_info = GET_IMAGE(struct atom_display_controller_info_v4_1,
   DATA_TABLES(dce_info));

 if (!firmware_info || !dce_info)
  return BP_RESULT_BADBIOSTABLE;

 memset(info, 0, sizeof(*info));

 header = GET_IMAGE(struct atom_common_table_header,
     DATA_TABLES(smu_info));
 get_atom_data_table_revision(header, &revision);

 if (revision.minor == 2) {
  /* Vega12 */
  smu_info_v3_2 = GET_IMAGE(struct atom_smu_info_v3_2,
       DATA_TABLES(smu_info));
  if (!smu_info_v3_2)
   return BP_RESULT_BADBIOSTABLE;

  DC_LOG_BIOS("gpuclk_ss_percentage (unit of 0.001 percent): %d\n", smu_info_v3_2->gpuclk_ss_percentage);

  info->default_engine_clk = smu_info_v3_2->bootup_dcefclk_10khz * 10;
 } else if (revision.minor == 3) {
  /* Vega20 */
  smu_info_v3_3 = GET_IMAGE(struct atom_smu_info_v3_3,
       DATA_TABLES(smu_info));
  if (!smu_info_v3_3)
   return BP_RESULT_BADBIOSTABLE;

  DC_LOG_BIOS("gpuclk_ss_percentage (unit of 0.001 percent): %d\n", smu_info_v3_3->gpuclk_ss_percentage);

  info->default_engine_clk = smu_info_v3_3->bootup_dcefclk_10khz * 10;
 }

  // We need to convert from 10KHz units into KHz units.
 info->default_memory_clk = firmware_info->bootup_mclk_in10khz * 10;

  /* 27MHz for Vega10 & Vega12; 100MHz for Vega20 */
 info->pll_info.crystal_frequency = dce_info->dce_refclk_10khz * 10;
 /* Hardcode frequency if BIOS gives no DCE Ref Clk */
 if (info->pll_info.crystal_frequency == 0) {
  if (revision.minor == 2)
   info->pll_info.crystal_frequency = 27000;
  else if (revision.minor == 3)
   info->pll_info.crystal_frequency = 100000;
 }
 /*dp_phy_ref_clk is not correct for atom_display_controller_info_v4_2, but we don't use it*/
 info->dp_phy_ref_clk     = dce_info->dpphy_refclk_10khz * 10;
 info->i2c_engine_ref_clk = dce_info->i2c_engine_refclk_10khz * 10;

 /* Get GPU PLL VCO Clock */
 if (bp->cmd_tbl.get_smu_clock_info != NULL) {
  if (revision.minor == 2)
   info->smu_gpu_pll_output_freq =
     bp->cmd_tbl.get_smu_clock_info(bp, SMU9_SYSPLL0_ID) * 10;
  else if (revision.minor == 3)
   info->smu_gpu_pll_output_freq =
     bp->cmd_tbl.get_smu_clock_info(bp, SMU11_SYSPLL3_0_ID) * 10;
 }

 if (firmware_info->board_i2c_feature_id == 0x2) {
  info->oem_i2c_present = true;
  info->oem_i2c_obj_id = firmware_info->board_i2c_feature_gpio_id;
 } else {
  info->oem_i2c_present = false;
 }

 return BP_RESULT_OK;
}

static enum bp_result get_firmware_info_v3_4(
 struct bios_parser *bp,
 struct dc_firmware_info *info)
{
 struct atom_firmware_info_v3_4 *firmware_info;
 struct atom_common_table_header *header;
 struct atom_data_revision revision;
 struct atom_display_controller_info_v4_1 *dce_info_v4_1 = NULL;
 struct atom_display_controller_info_v4_4 *dce_info_v4_4 = NULL;

 struct atom_smu_info_v3_5 *smu_info_v3_5 = NULL;
 struct atom_display_controller_info_v4_5 *dce_info_v4_5 = NULL;
 struct atom_smu_info_v4_0 *smu_info_v4_0 = NULL;

 if (!info)
  return BP_RESULT_BADINPUT;

 firmware_info = GET_IMAGE(struct atom_firmware_info_v3_4,
   DATA_TABLES(firmwareinfo));

 if (!firmware_info)
  return BP_RESULT_BADBIOSTABLE;

 memset(info, 0, sizeof(*info));

 header = GET_IMAGE(struct atom_common_table_header,
     DATA_TABLES(dce_info));

 get_atom_data_table_revision(header, &revision);

 switch (revision.major) {
 case 4:
  switch (revision.minor) {
  case 5:
   dce_info_v4_5 = GET_IMAGE(struct atom_display_controller_info_v4_5,
       DATA_TABLES(dce_info));

   if (!dce_info_v4_5)
    return BP_RESULT_BADBIOSTABLE;

    /* 100MHz expected */
   info->pll_info.crystal_frequency = dce_info_v4_5->dce_refclk_10khz * 10;
   info->dp_phy_ref_clk             = dce_info_v4_5->dpphy_refclk_10khz * 10;
    /* 50MHz expected */
   info->i2c_engine_ref_clk         = dce_info_v4_5->i2c_engine_refclk_10khz * 10;

   /* For DCN32/321 Display PLL VCO Frequency from dce_info_v4_5 may not be reliable */
   break;

  case 4:
   dce_info_v4_4 = GET_IMAGE(struct atom_display_controller_info_v4_4,
       DATA_TABLES(dce_info));

   if (!dce_info_v4_4)
    return BP_RESULT_BADBIOSTABLE;

   /* 100MHz expected */
   info->pll_info.crystal_frequency = dce_info_v4_4->dce_refclk_10khz * 10;
   info->dp_phy_ref_clk             = dce_info_v4_4->dpphy_refclk_10khz * 10;
   /* 50MHz expected */
   info->i2c_engine_ref_clk         = dce_info_v4_4->i2c_engine_refclk_10khz * 10;

   /* Get SMU Display PLL VCO Frequency in KHz*/
   info->smu_gpu_pll_output_freq = dce_info_v4_4->dispclk_pll_vco_freq * 10;
   break;

  default:
   /* should not come here, keep as backup, as was before */
   dce_info_v4_1 = GET_IMAGE(struct atom_display_controller_info_v4_1,
       DATA_TABLES(dce_info));

   if (!dce_info_v4_1)
    return BP_RESULT_BADBIOSTABLE;

   info->pll_info.crystal_frequency = dce_info_v4_1->dce_refclk_10khz * 10;
   info->dp_phy_ref_clk             = dce_info_v4_1->dpphy_refclk_10khz * 10;
   info->i2c_engine_ref_clk         = dce_info_v4_1->i2c_engine_refclk_10khz * 10;
   break;
  }
  break;

 default:
  ASSERT(0);
  break;
 }

 header = GET_IMAGE(struct atom_common_table_header,
     DATA_TABLES(smu_info));
 get_atom_data_table_revision(header, &revision);

 switch (revision.major) {
 case 3:
  switch (revision.minor) {
  case 5:
   smu_info_v3_5 = GET_IMAGE(struct atom_smu_info_v3_5,
       DATA_TABLES(smu_info));

   if (!smu_info_v3_5)
    return BP_RESULT_BADBIOSTABLE;
   DC_LOG_BIOS("gpuclk_ss_percentage (unit of 0.001 percent): %d\n", smu_info_v3_5->gpuclk_ss_percentage);
   info->default_engine_clk = smu_info_v3_5->bootup_dcefclk_10khz * 10;
   break;

  default:
   break;
  }
  break;

 case 4:
  switch (revision.minor) {
  case 0:
   smu_info_v4_0 = GET_IMAGE(struct atom_smu_info_v4_0,
       DATA_TABLES(smu_info));

   if (!smu_info_v4_0)
    return BP_RESULT_BADBIOSTABLE;

   /* For DCN32/321 bootup DCFCLK from smu_info_v4_0 may not be reliable */
   break;

  default:
   break;
  }
  break;

 default:
  break;
 }

  // We need to convert from 10KHz units into KHz units.
 info->default_memory_clk = firmware_info->bootup_mclk_in10khz * 10;

 if (firmware_info->board_i2c_feature_id == 0x2) {
  info->oem_i2c_present = true;
  info->oem_i2c_obj_id = firmware_info->board_i2c_feature_gpio_id;
 } else {
  info->oem_i2c_present = false;
 }

 return BP_RESULT_OK;
}

static enum bp_result get_firmware_info_v3_5(
 struct bios_parser *bp,
 struct dc_firmware_info *info)
{
 struct atom_firmware_info_v3_5 *firmware_info;
 struct atom_common_table_header *header;
 struct atom_data_revision revision;
 struct atom_display_controller_info_v4_5 *dce_info_v4_5 = NULL;

 if (!info)
  return BP_RESULT_BADINPUT;

 firmware_info = GET_IMAGE(struct atom_firmware_info_v3_5,
   DATA_TABLES(firmwareinfo));

 if (!firmware_info)
  return BP_RESULT_BADBIOSTABLE;

 memset(info, 0, sizeof(*info));

 if (firmware_info->board_i2c_feature_id == 0x2) {
  info->oem_i2c_present = true;
  info->oem_i2c_obj_id = firmware_info->board_i2c_feature_gpio_id;
 } else {
  info->oem_i2c_present = false;
 }

 header = GET_IMAGE(struct atom_common_table_header,
     DATA_TABLES(dce_info));

 get_atom_data_table_revision(header, &revision);

 switch (revision.major) {
 case 4:
  switch (revision.minor) {
  case 5:
   dce_info_v4_5 = GET_IMAGE(struct atom_display_controller_info_v4_5,
       DATA_TABLES(dce_info));

   if (!dce_info_v4_5)
    return BP_RESULT_BADBIOSTABLE;

    /* 100MHz expected */
   info->pll_info.crystal_frequency = dce_info_v4_5->dce_refclk_10khz * 10;
   break;
  default:
   break;
  }
  break;
 default:
  break;
 }


 return BP_RESULT_OK;
}

static enum bp_result bios_parser_get_encoder_cap_info(
 struct dc_bios *dcb,
 struct graphics_object_id object_id,
 struct bp_encoder_cap_info *info)
{
 struct bios_parser *bp = BP_FROM_DCB(dcb);
 struct atom_display_object_path_v2 *object;
 struct atom_encoder_caps_record *record = NULL;

 if (!info)
  return BP_RESULT_BADINPUT;

#if defined(CONFIG_DRM_AMD_DC_FP)
 /* encoder cap record not available in v1_5 */
 if (bp->object_info_tbl.revision.minor == 5)
  return BP_RESULT_NORECORD;
#endif

 object = get_bios_object(bp, object_id);

 if (!object)
  return BP_RESULT_BADINPUT;

 record = get_encoder_cap_record(bp, object);
 if (!record)
  return BP_RESULT_NORECORD;
 DC_LOG_BIOS("record->encodercaps 0x%x for object_id 0x%x", record->encodercaps, object_id.id);

 info->DP_HBR2_CAP = (record->encodercaps &
   ATOM_ENCODER_CAP_RECORD_HBR2) ? 1 : 0;
 info->DP_HBR2_EN = (record->encodercaps &
   ATOM_ENCODER_CAP_RECORD_HBR2_EN) ? 1 : 0;
 info->DP_HBR3_EN = (record->encodercaps &
   ATOM_ENCODER_CAP_RECORD_HBR3_EN) ? 1 : 0;
 info->HDMI_6GB_EN = (record->encodercaps &
   ATOM_ENCODER_CAP_RECORD_HDMI6Gbps_EN) ? 1 : 0;
 info->IS_DP2_CAPABLE = (record->encodercaps &
   ATOM_ENCODER_CAP_RECORD_DP2) ? 1 : 0;
 info->DP_UHBR10_EN = (record->encodercaps &
   ATOM_ENCODER_CAP_RECORD_UHBR10_EN) ? 1 : 0;
 info->DP_UHBR13_5_EN = (record->encodercaps &
   ATOM_ENCODER_CAP_RECORD_UHBR13_5_EN) ? 1 : 0;
 info->DP_UHBR20_EN = (record->encodercaps &
   ATOM_ENCODER_CAP_RECORD_UHBR20_EN) ? 1 : 0;
 info->DP_IS_USB_C = (record->encodercaps &
   ATOM_ENCODER_CAP_RECORD_USB_C_TYPE) ? 1 : 0;
 DC_LOG_BIOS("\t info->DP_IS_USB_C %d", info->DP_IS_USB_C);

 return BP_RESULT_OK;
}


static struct atom_encoder_caps_record *get_encoder_cap_record(
 struct bios_parser *bp,
 struct atom_display_object_path_v2 *object)
{
 struct atom_common_record_header *header;
 uint32_t offset;

 if (!object) {
  BREAK_TO_DEBUGGER(); /* Invalid object */
  return NULL;
 }

 offset = object->encoder_recordoffset + bp->object_info_tbl_offset;

 for (;;) {
  header = GET_IMAGE(struct atom_common_record_header, offset);

  if (!header)
   return NULL;

  offset += header->record_size;

  if (header->record_type == LAST_RECORD_TYPE ||
    !header->record_size)
   break;

  if (header->record_type != ATOM_ENCODER_CAP_RECORD_TYPE)
   continue;

  if (sizeof(struct atom_encoder_caps_record) <=
       header->record_size)
   return (struct atom_encoder_caps_record *)header;
 }

 return NULL;
}

static struct atom_disp_connector_caps_record *get_disp_connector_caps_record(
 struct bios_parser *bp,
 struct atom_display_object_path_v2 *object)
{
 struct atom_common_record_header *header;
 uint32_t offset;

 if (!object) {
  BREAK_TO_DEBUGGER(); /* Invalid object */
  return NULL;
 }

 offset = object->disp_recordoffset + bp->object_info_tbl_offset;

 for (;;) {
  header = GET_IMAGE(struct atom_common_record_header, offset);

  if (!header)
   return NULL;

  offset += header->record_size;

  if (header->record_type == LAST_RECORD_TYPE ||
    !header->record_size)
   break;

  if (header->record_type != ATOM_DISP_CONNECTOR_CAPS_RECORD_TYPE)
   continue;

  if (sizeof(struct atom_disp_connector_caps_record) <=
       header->record_size)
   return (struct atom_disp_connector_caps_record *)header;
 }

 return NULL;
}

static struct atom_connector_caps_record *get_connector_caps_record(struct bios_parser *bp,
            struct atom_display_object_path_v3 *object)
{
 struct atom_common_record_header *header;
 uint32_t offset;

 if (!object) {
  BREAK_TO_DEBUGGER(); /* Invalid object */
  return NULL;
 }

 offset = object->disp_recordoffset + bp->object_info_tbl_offset;

 for (;;) {
  header = GET_IMAGE(struct atom_common_record_header, offset);

  if (!header)
   return NULL;

  offset += header->record_size;

  if (header->record_type == ATOM_RECORD_END_TYPE ||
    !header->record_size)
   break;

  if (header->record_type != ATOM_CONNECTOR_CAP_RECORD_TYPE)
   continue;

  if (sizeof(struct atom_connector_caps_record) <= header->record_size)
   return (struct atom_connector_caps_record *)header;
 }

 return NULL;
}

static enum bp_result bios_parser_get_disp_connector_caps_info(
 struct dc_bios *dcb,
 struct graphics_object_id object_id,
 struct bp_disp_connector_caps_info *info)
{
 struct bios_parser *bp = BP_FROM_DCB(dcb);
 struct atom_display_object_path_v2 *object;
 struct atom_display_object_path_v3 *object_path_v3;
 struct atom_connector_caps_record *record_path_v3;
 struct atom_disp_connector_caps_record *record = NULL;

 if (!info)
  return BP_RESULT_BADINPUT;

 switch (bp->object_info_tbl.revision.minor) {
 case 4:
  default:
   object = get_bios_object(bp, object_id);

   if (!object)
    return BP_RESULT_BADINPUT;

   record = get_disp_connector_caps_record(bp, object);
   if (!record)
    return BP_RESULT_NORECORD;

   info->INTERNAL_DISPLAY =
    (record->connectcaps & ATOM_CONNECTOR_CAP_INTERNAL_DISPLAY) ? 1 : 0;
   info->INTERNAL_DISPLAY_BL =
    (record->connectcaps & ATOM_CONNECTOR_CAP_INTERNAL_DISPLAY_BL) ? 1 : 0;
   break;
 case 5:
  object_path_v3 = get_bios_object_from_path_v3(bp, object_id);

  if (!object_path_v3)
   return BP_RESULT_BADINPUT;

  record_path_v3 = get_connector_caps_record(bp, object_path_v3);
  if (!record_path_v3)
   return BP_RESULT_NORECORD;

  info->INTERNAL_DISPLAY = (record_path_v3->connector_caps & ATOM_CONNECTOR_CAP_INTERNAL_DISPLAY)
         ? 1 : 0;
  info->INTERNAL_DISPLAY_BL = (record_path_v3->connector_caps & ATOM_CONNECTOR_CAP_INTERNAL_DISPLAY_BL)
          ? 1 : 0;
  break;
 }

 return BP_RESULT_OK;
}

static struct atom_connector_speed_record *get_connector_speed_cap_record(struct bios_parser *bp,
           struct atom_display_object_path_v3 *object)
{
 struct atom_common_record_header *header;
 uint32_t offset;

 if (!object) {
  BREAK_TO_DEBUGGER(); /* Invalid object */
  return NULL;
 }

 offset = object->disp_recordoffset + bp->object_info_tbl_offset;

 for (;;) {
  header = GET_IMAGE(struct atom_common_record_header, offset);

  if (!header)
   return NULL;

  offset += header->record_size;

  if (header->record_type == ATOM_RECORD_END_TYPE ||
    !header->record_size)
   break;

  if (header->record_type != ATOM_CONNECTOR_SPEED_UPTO)
   continue;

  if (sizeof(struct atom_connector_speed_record) <= header->record_size)
   return (struct atom_connector_speed_record *)header;
 }

 return NULL;
}

static enum bp_result bios_parser_get_connector_speed_cap_info(
 struct dc_bios *dcb,
 struct graphics_object_id object_id,
 struct bp_connector_speed_cap_info *info)
{
 struct bios_parser *bp = BP_FROM_DCB(dcb);
 struct atom_display_object_path_v3 *object_path_v3;
 //struct atom_connector_speed_record *record = NULL;
 struct atom_connector_speed_record *record;

 if (!info)
  return BP_RESULT_BADINPUT;

--> --------------------

--> maximum size reached

--> --------------------