path: root/drivers/gpu/drm/amd/display/modules/power/power_abm.c

// SPDX-License-Identifier: MIT
//
// Copyright 2026 Advanced Micro Devices, Inc.

#include "dm_services.h"
#include "dc.h"
#include "mod_power.h"
#include "core_types.h"
#include "dmcu.h"
#include "abm.h"
#include "power_helpers.h"
#include "dce/dmub_psr.h"
#include "dal_asic_id.h"
#include "link_service.h"
#include <linux/math.h>

#define DC_TRACE_LEVEL_MESSAGE(...) /* do nothing */
#define DC_TRACE_LEVEL_MESSAGEP(...) /* do nothing */

#define DIV_ROUNDUP(a, b) (((a)+((b)/2))/(b))
#define bswap16_based_on_endian(big_endian, value) \
	((big_endian) ? cpu_to_be16(value) : cpu_to_le16(value))

/* Possible Min Reduction config from least aggressive to most aggressive
 *  0    1     2     3     4     5     6     7     8     9     10    11   12
 * 100  98.0 94.1  94.1  85.1  80.3  75.3  69.4  60.0  57.6  50.2  49.8  40.0 %
 */
static const unsigned char min_reduction_table[13] = {
0xff, 0xfa, 0xf0, 0xf0, 0xd9, 0xcd, 0xc0, 0xb1, 0x99, 0x93, 0x80, 0x82, 0x66};

/* Possible Max Reduction configs from least aggressive to most aggressive
 *  0    1     2     3     4     5     6     7     8     9     10    11   12
 * 96.1 89.8 85.1  80.3  69.4  64.7  64.7  50.2  39.6  30.2  30.2  30.2  19.6 %
 */
static const unsigned char max_reduction_table[13] = {
0xf5, 0xe5, 0xd9, 0xcd, 0xb1, 0xa5, 0xa5, 0x80, 0x65, 0x4d, 0x4d, 0x4d, 0x32};

/* Possible ABM 2.2 Min Reduction configs from least aggressive to most aggressive
 *  0    1     2     3     4     5     6     7     8     9     10    11   12
 * 100  100   100   100   100   100   100   100  100  92.2  83.1  75.3  75.3 %
 */
static const unsigned char min_reduction_table_v_2_2[13] = {
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xeb, 0xd4, 0xc0, 0xc0};

/* Possible ABM 2.2 Max Reduction configs from least aggressive to most aggressive
 *  0    1     2     3     4     5     6     7     8     9     10    11   12
 * 96.1 89.8 74.9  69.4  64.7  52.2  48.6  39.6  30.2  25.1  19.6  12.5  12.5 %
 */
static const unsigned char max_reduction_table_v_2_2[13] = {
0xf5, 0xe5, 0xbf, 0xb1, 0xa5, 0x85, 0x7c, 0x65, 0x4d, 0x40, 0x32, 0x20, 0x20};

/* Predefined ABM configuration sets. We may have different configuration sets
 * in order to satisfy different power/quality requirements.
 */
static const unsigned char abm_config[abm_defines_max_config][abm_defines_max_level] = {
/*  ABM Level 1,    ABM Level 2,    ABM Level 3,    ABM Level 4 */
{       2,              5,              7,              8       },	/* Default - Medium aggressiveness */
{       2,              5,              8,              11      },	/* Alt #1  - Increased aggressiveness */
{       0,              2,              4,              8       },	/* Alt #2  - Minimal aggressiveness */
{       3,              6,              10,             12      },	/* Alt #3  - Super aggressiveness */
};

struct abm_parameters {
	unsigned char min_reduction;
	unsigned char max_reduction;
	unsigned char bright_pos_gain;
	unsigned char dark_pos_gain;
	unsigned char brightness_gain;
	unsigned char contrast_factor;
	unsigned char deviation_gain;
	unsigned char min_knee;
	unsigned char max_knee;
	unsigned short blRampReduction;
	unsigned short blRampStart;
};

static const struct abm_parameters abm_settings_config0[abm_defines_max_level] = {
//  min_red  max_red  bright_pos  dark_pos  bright_gain  contrast  dev   min_knee  max_knee  blRed    blStart
	{0xff,   0xbf,    0x20,       0x00,     0xff,        0x99,     0xb3, 0x40,     0xe0,     0xf777,  0xcccc},
	{0xde,   0x85,    0x20,       0x00,     0xe0,        0x90,     0xa8, 0x40,     0xc8,     0xf777,  0xcccc},
	{0xb0,   0x50,    0x20,       0x00,     0xc0,        0x88,     0x78, 0x70,     0xa0,     0xeeee,  0x9999},
	{0x82,   0x40,    0x20,       0x00,     0x00,        0xb8,     0xb3, 0x70,     0x70,     0xe333,  0xb333},
};

static const struct abm_parameters abm_settings_config1[abm_defines_max_level] = {
//  min_red  max_red  bright_pos  dark_pos  bright_gain  contrast  dev   min_knee  max_knee  blRed  blStart
	{0xf0,   0xd9,    0x20,       0x00,     0x00,        0xff,     0xb3, 0x70,     0x70,     0xcccc,  0xcccc},
	{0xcd,   0xa5,    0x20,       0x00,     0x00,        0xff,     0xb3, 0x70,     0x70,     0xcccc,  0xcccc},
	{0x99,   0x65,    0x20,       0x00,     0x00,        0xff,     0xb3, 0x70,     0x70,     0xcccc,  0xcccc},
	{0x82,   0x4d,    0x20,       0x00,     0x00,        0xff,     0xb3, 0x70,     0x70,     0xcccc,  0xcccc},
};

static const struct abm_parameters abm_settings_config2[abm_defines_max_level] = {
//  min_red  max_red  bright_pos  dark_pos  bright_gain  contrast  dev   min_knee  max_knee  blRed    blStart
	{0xf0,   0xbf,    0x20,       0x00,     0x88,        0x99,     0xb3, 0x40,     0xe0,    0x0000,  0xcccc},
	{0xd8,   0x85,    0x20,       0x00,     0x70,        0x90,     0xa8, 0x40,     0xc8,    0x0700,  0xb333},
	{0xb8,   0x58,    0x20,       0x00,     0x64,        0x88,     0x78, 0x70,     0xa0,    0x7000,  0x9999},
	{0x82,   0x40,    0x20,       0x00,     0x00,        0xb8,     0xb3, 0x70,     0x70,    0xc333,  0xb333},
};

static const struct abm_parameters * const abm_settings[] = {
	abm_settings_config0,
	abm_settings_config1,
	abm_settings_config2,
};

static const struct dm_bl_data_point custom_backlight_curve0[] = {
		{2, 14}, {4, 16}, {6, 18}, {8, 21}, {10, 23}, {12, 26}, {14, 29}, {16, 32}, {18, 35},
		{20, 38}, {22, 41}, {24, 44}, {26, 48}, {28, 52}, {30, 55}, {32, 59}, {34, 62},
		{36, 67}, {38, 71}, {40, 75}, {42, 80}, {44, 84}, {46, 88}, {48, 93}, {50, 98},
		{52, 103}, {54, 108}, {56, 113}, {58, 118}, {60, 123}, {62, 129}, {64, 135}, {66, 140},
		{68, 146}, {70, 152}, {72, 158}, {74, 164}, {76, 171}, {78, 177}, {80, 183}, {82, 190},
		{84, 197}, {86, 204}, {88, 211}, {90, 218}, {92, 225}, {94, 232}, {96, 240}, {98, 247}};

struct custom_backlight_profile {
	uint8_t  ac_level_percentage;
	uint8_t  dc_level_percentage;
	uint8_t  min_input_signal;
	uint8_t  max_input_signal;
	uint8_t  num_data_points;
	const struct dm_bl_data_point *data_points;
};

static const struct custom_backlight_profile custom_backlight_profiles[] = {
		{100, 32, 12, 255, ARRAY_SIZE(custom_backlight_curve0), custom_backlight_curve0},
};

#define NUM_AMBI_LEVEL    5
#define NUM_AGGR_LEVEL    4
#define NUM_POWER_FN_SEGS 8
#define NUM_BL_CURVE_SEGS 16
#define IRAM_SIZE 256

#define IRAM_RESERVE_AREA_START_V2 0xF0  // reserve 0xF0~0xF6 are write by DMCU only
#define IRAM_RESERVE_AREA_END_V2 0xF6  // reserve 0xF0~0xF6 are write by DMCU only

#define IRAM_RESERVE_AREA_START_V2_2 0xF0  // reserve 0xF0~0xFF are write by DMCU only
#define IRAM_RESERVE_AREA_END_V2_2 0xFF  // reserve 0xF0~0xFF are write by DMCU only

#pragma pack(push, 1)
/* NOTE: iRAM is 256B in size */
struct iram_table_v_2 {
	/* flags                      */
	uint16_t min_abm_backlight;					/* 0x00 U16  */

	/* parameters for ABM2.0 algorithm */
	uint8_t min_reduction[NUM_AMBI_LEVEL][NUM_AGGR_LEVEL];		/* 0x02 U0.8 */
	uint8_t max_reduction[NUM_AMBI_LEVEL][NUM_AGGR_LEVEL];		/* 0x16 U0.8 */
	uint8_t bright_pos_gain[NUM_AMBI_LEVEL][NUM_AGGR_LEVEL];	/* 0x2a U2.6 */
	uint8_t bright_neg_gain[NUM_AMBI_LEVEL][NUM_AGGR_LEVEL];	/* 0x3e U2.6 */
	uint8_t dark_pos_gain[NUM_AMBI_LEVEL][NUM_AGGR_LEVEL];		/* 0x52 U2.6 */
	uint8_t dark_neg_gain[NUM_AMBI_LEVEL][NUM_AGGR_LEVEL];		/* 0x66 U2.6 */
	uint8_t iir_curve[NUM_AMBI_LEVEL];				/* 0x7a U0.8 */
	uint8_t deviation_gain;						/* 0x7f U0.8 */

	/* parameters for crgb conversion */
	uint16_t crgb_thresh[NUM_POWER_FN_SEGS];			/* 0x80 U3.13 */
	uint16_t crgb_offset[NUM_POWER_FN_SEGS];			/* 0x90 U1.15 */
	uint16_t crgb_slope[NUM_POWER_FN_SEGS];				/* 0xa0 U4.12 */

	/* parameters for custom curve */
	/* thresholds for brightness --> backlight */
	uint16_t backlight_thresholds[NUM_BL_CURVE_SEGS];		/* 0xb0 U16.0 */
	/* offsets for brightness --> backlight */
	uint16_t backlight_offsets[NUM_BL_CURVE_SEGS];			/* 0xd0 U16.0 */

	/* For reading PSR State directly from IRAM */
	uint8_t psr_state;						/* 0xf0       */
	uint8_t dmcu_mcp_interface_version;				/* 0xf1       */
	uint8_t dmcu_abm_feature_version;				/* 0xf2       */
	uint8_t dmcu_psr_feature_version;				/* 0xf3       */
	uint16_t dmcu_version;						/* 0xf4       */
	uint8_t dmcu_state;						/* 0xf6       */

	uint16_t blRampReduction;					/* 0xf7       */
	uint16_t blRampStart;						/* 0xf9       */
	uint8_t dummy5;							/* 0xfb       */
	uint8_t dummy6;							/* 0xfc       */
	uint8_t dummy7;							/* 0xfd       */
	uint8_t dummy8;							/* 0xfe       */
	uint8_t dummy9;							/* 0xff       */
};

struct iram_table_v_2_2 {
	/* flags                      */
	uint16_t flags;							/* 0x00 U16  */

	/* parameters for ABM2.2 algorithm */
	uint8_t min_reduction[NUM_AMBI_LEVEL][NUM_AGGR_LEVEL];		/* 0x02 U0.8 */
	uint8_t max_reduction[NUM_AMBI_LEVEL][NUM_AGGR_LEVEL];		/* 0x16 U0.8 */
	uint8_t bright_pos_gain[NUM_AMBI_LEVEL][NUM_AGGR_LEVEL];	/* 0x2a U2.6 */
	uint8_t dark_pos_gain[NUM_AMBI_LEVEL][NUM_AGGR_LEVEL];		/* 0x3e U2.6 */
	uint8_t hybrid_factor[NUM_AGGR_LEVEL];				/* 0x52 U0.8 */
	uint8_t contrast_factor[NUM_AGGR_LEVEL];			/* 0x56 U0.8 */
	uint8_t deviation_gain[NUM_AGGR_LEVEL];				/* 0x5a U0.8 */
	uint8_t iir_curve[NUM_AMBI_LEVEL];				/* 0x5e U0.8 */
	uint8_t min_knee[NUM_AGGR_LEVEL];				/* 0x63 U0.8 */
	uint8_t max_knee[NUM_AGGR_LEVEL];				/* 0x67 U0.8 */
	uint16_t min_abm_backlight;					/* 0x6b U16  */
	uint8_t pad[19];						/* 0x6d U0.8 */

	/* parameters for crgb conversion */
	uint16_t crgb_thresh[NUM_POWER_FN_SEGS];			/* 0x80 U3.13 */
	uint16_t crgb_offset[NUM_POWER_FN_SEGS];			/* 0x90 U1.15 */
	uint16_t crgb_slope[NUM_POWER_FN_SEGS];				/* 0xa0 U4.12 */

	/* parameters for custom curve */
	/* thresholds for brightness --> backlight */
	uint16_t backlight_thresholds[NUM_BL_CURVE_SEGS];		/* 0xb0 U16.0 */
	/* offsets for brightness --> backlight */
	uint16_t backlight_offsets[NUM_BL_CURVE_SEGS];			/* 0xd0 U16.0 */

	/* For reading PSR State directly from IRAM */
	uint8_t psr_state;						/* 0xf0       */
	uint8_t dmcu_mcp_interface_version;				/* 0xf1       */
	uint8_t dmcu_abm_feature_version;				/* 0xf2       */
	uint8_t dmcu_psr_feature_version;				/* 0xf3       */
	uint16_t dmcu_version;						/* 0xf4       */
	uint8_t dmcu_state;						/* 0xf6       */

	uint8_t dummy1;							/* 0xf7       */
	uint8_t dummy2;							/* 0xf8       */
	uint8_t dummy3;							/* 0xf9       */
	uint8_t dummy4;							/* 0xfa       */
	uint8_t dummy5;							/* 0xfb       */
	uint8_t dummy6;							/* 0xfc       */
	uint8_t dummy7;							/* 0xfd       */
	uint8_t dummy8;							/* 0xfe       */
	uint8_t dummy9;							/* 0xff       */
};
#pragma pack(pop)

#define MOD_POWER_MAX_CONCURRENT_STREAMS 32
#define SMOOTH_BRIGHTNESS_ADJUSTMENT_TIME_IN_MS 500

/* If system or panel does not report some sort of brightness percent to nits
 * mapping, we will use following default values so backlight control using
 * nits based interfaces will still work, but might not describe panel
 * correctly. In this case percentage based backlight control should ideally
 * be used.
 * Min = 5 nits
 * Max = 300 nits
 */

#define MOD_POWER_TO_CORE(mod_power)\
		container_of(mod_power, struct core_power, mod_public)

static uint16_t backlight_8_to_16(unsigned int backlight_8bit)
{
	return (uint16_t)(backlight_8bit * 0x101);
}

unsigned int backlight_millipercent_to_millinit(
		struct core_power *core_power, unsigned int millipercent, unsigned int inst)
{
	unsigned int millinit = 0;
	unsigned long long numerator = 0;

	if (core_power == NULL)
		return 0;

	numerator = ((unsigned long long)millipercent) *
				core_power->bl_prop[inst].nits_range;
	millinit = ((unsigned int)div_u64(numerator, 100000)) +
			core_power->bl_prop[inst].min_brightness_millinits;

	return millinit;
}

static unsigned int backlight_millinit_to_millipercent(
		struct core_power *core_power, unsigned int millinit, unsigned int inst)
{
	unsigned int millipercent = 0;
	unsigned long long numerator = 0;

	if (core_power == NULL)
		return 0;

	if (millinit <= core_power->bl_prop[inst].min_brightness_millinits)
		return 0;

	if (millinit >= core_power->bl_prop[inst].max_brightness_millinits)
		return (100 * 1000);

	numerator = (((unsigned long long)millinit) -
			core_power->bl_prop[inst].min_brightness_millinits) * 100000;
	millipercent = ((unsigned int)div_u64(numerator,
				core_power->bl_prop[inst].nits_range));

	return millipercent;
}

static unsigned int backlight_pwm_to_millipercent(
		struct core_power *core_power, unsigned int pwm, unsigned int inst)
{
	unsigned int millipercent = 0;
	unsigned int max_index = 0;

	if (core_power == NULL)
		return 0;

	if (!core_power->bl_prop[inst].backlight_caps_valid)
		return 0;

	/* Doesn't really make sense to have one single backlight level
	 * possible...
	 */
	if (core_power->bl_prop[inst].num_backlight_levels < 2)
		return 0;

	max_index = core_power->bl_prop[inst].num_backlight_levels - 1;

	if (pwm <= core_power->bl_prop[inst].backlight_lut[0])
		return 0;

	if (pwm > core_power->bl_prop[inst].backlight_lut[max_index])
		return (100 * 1000);

	/* We need to do a binary search over the array for where the pwm level
	 * is in the lut. Based on the index we can determine percentage.
	 */
	unsigned int min = 0;
	unsigned int max = max_index;
	unsigned int mid = 0;

	while (max >= min) {
		mid = (min + max) / 2; /* floor of half range */

		if (core_power->bl_prop[inst].backlight_lut[mid] < pwm)
			min = mid + 1;
		else if (core_power->bl_prop[inst].backlight_lut[mid] > pwm)
			max = mid - 1;
		else
			break;
	}

	/* In this case, exact match is not found. Check if mid/min/max
	 * value is actually closer.
	 */
	if (max < min) {
		unsigned int min_delta;
		unsigned int mid_delta;
		unsigned int max_delta;

		min_delta = (core_power->bl_prop[inst].backlight_lut[min] > pwm) ?
				core_power->bl_prop[inst].backlight_lut[min] - pwm :
				pwm - core_power->bl_prop[inst].backlight_lut[min];

		mid_delta = (core_power->bl_prop[inst].backlight_lut[mid] > pwm) ?
				core_power->bl_prop[inst].backlight_lut[mid] - pwm :
				pwm - core_power->bl_prop[inst].backlight_lut[mid];

		max_delta = (core_power->bl_prop[inst].backlight_lut[max] > pwm) ?
				core_power->bl_prop[inst].backlight_lut[max] - pwm :
				pwm - core_power->bl_prop[inst].backlight_lut[max];

		if ((min_delta < mid_delta) && (min_delta < max_delta))
			mid = min;

		if ((max_delta < mid_delta) && (max_delta < min_delta))
			mid = max;
	}

	/* No interpolation, just take closest index */
	millipercent = 1000 * 100 * mid / max_index;

	return millipercent;
}

static unsigned int backlight_pwm_to_millinit(
		struct core_power *core_power, unsigned int pwm, unsigned int inst)
{
	unsigned int millinit = 0;

	if (core_power == NULL)
		return 0;

	if (pwm <= core_power->bl_prop[inst].min_backlight_pwm)
		return core_power->bl_prop[inst].min_brightness_millinits;

	if (pwm >= core_power->bl_prop[inst].max_backlight_pwm)
		return core_power->bl_prop[inst].max_brightness_millinits;

	millinit = ((unsigned int)div_u64(((unsigned long long)pwm -
				core_power->bl_prop[inst].min_backlight_pwm) *
				core_power->bl_prop[inst].nits_range,
				core_power->bl_prop[inst].backlight_range));

	millinit += core_power->bl_prop[inst].min_brightness_millinits;

	if (millinit > core_power->bl_prop[inst].max_brightness_millinits)
		millinit = core_power->bl_prop[inst].max_brightness_millinits;

	return millinit;
}

unsigned int backlight_millipercent_to_pwm(
		struct core_power *core_power, unsigned int millipercent, unsigned int inst)
{
	unsigned int pwm = (unsigned int)-1;
	unsigned int index = 0;

	if (core_power == NULL)
		return 0;

	// Bypass the brightness mapping LUT
	if (core_power->bl_prop->use_linear_backlight_curve) {
		pwm = core_power->bl_prop[inst].min_backlight_pwm +
			(unsigned int) div_u64((unsigned long long) millipercent *
			core_power->bl_prop[inst].backlight_range,
			100000);

		if (pwm > core_power->bl_prop[inst].max_backlight_pwm)
			pwm = core_power->bl_prop[inst].max_backlight_pwm;

		return pwm;
	}

	if (millipercent >= (100 * 1000))
		return core_power->bl_prop[inst].backlight_lut[core_power->bl_prop[inst].num_backlight_levels - 1];

	/* This will give the floor index. */
	index = ((core_power->bl_prop[inst].num_backlight_levels - 1) *
						millipercent) / 100000;
	/* Null check otherwise eDP doesn't lightup when connected to DP1 */
	if (core_power->bl_prop[inst].backlight_lut == NULL)
		return pwm;

	pwm = core_power->bl_prop[inst].backlight_lut[index];

	return pwm;
}

static unsigned int backlight_millinit_to_pwm(
		struct core_power *core_power, unsigned int millinit, unsigned int inst)
{
	unsigned int pwm = 0;

	if (core_power == NULL)
		return 0;

	/* For nits based brightness, the signal will be a value
	 * between the minimum and maximum value.
	 */
	if (millinit >= core_power->bl_prop[inst].max_brightness_millinits)
		return core_power->bl_prop[inst].max_backlight_pwm;
	else if (millinit <= core_power->bl_prop[inst].min_brightness_millinits)
		return core_power->bl_prop[inst].min_backlight_pwm;

	pwm = ((unsigned int)div_u64(((unsigned long long)millinit -
			core_power->bl_prop[inst].min_brightness_millinits) *
			core_power->bl_prop[inst].backlight_range,
			core_power->bl_prop[inst].nits_range));

	pwm += core_power->bl_prop[inst].min_backlight_pwm;

	if (pwm > core_power->bl_prop[inst].max_backlight_pwm)
		pwm = core_power->bl_prop[inst].max_backlight_pwm;

	return pwm;
}

static bool validate_ext_backlight_caps(
		struct dm_acpi_atif_backlight_caps *ext_backlight_caps)
{
	unsigned int i;
	unsigned int num_of_data_points = 0;
	unsigned int last_signal_level = 0;
	unsigned int last_luminance = 0;

	num_of_data_points = ext_backlight_caps->num_data_points;

	/* Validation rules:
	 * 1. BIOS should carry customized data points and
	 * the number of data points should not be larger than 99.
	 * 2. The max_input_signal should be larger than min_input_signal.
	 * 3. For each data point:
	 *	a. luminance should be in ascending order and
	 *	should not be 0 or 100 since the corresponding signal_level
	 *	are assigned by min_input_signal and max_input_signal.
	 *	b. signal_level should be in ascending order and
	 *	be within the range of min/max_input_signal.
	 */
	if (num_of_data_points > BL_DATA_POINTS)
		return false;

	if (ext_backlight_caps->min_input_signal >= ext_backlight_caps->max_input_signal)
		return false;

	last_signal_level = ext_backlight_caps->min_input_signal;
	for (i = 0; i < num_of_data_points; i++) {
		unsigned int luminance = ext_backlight_caps->data_points[i].luminance;
		unsigned int signal_level = ext_backlight_caps->data_points[i].signal_level;

		if ((luminance <= last_luminance) || (luminance > BL_DATA_POINTS))
			return false;

		if ((signal_level <= last_signal_level) || (signal_level >= ext_backlight_caps->max_input_signal))
			return false;

		last_signal_level = signal_level;
		last_luminance = luminance;
	}

	return true;
}

/* hard coded to default backlight curve. */
void initialize_backlight_caps(struct core_power *core_power, unsigned int inst)
{
	unsigned int i;
	struct dm_acpi_atif_backlight_caps *ext_backlight_caps = NULL;
	bool custom_curve_present = false;
	unsigned int num_levels = 0;
	struct dc *dc = NULL;
	enum dm_acpi_display_type acpi_display_type =
		(inst == 0) ? AcpiDisplayType_LCD1 : AcpiDisplayType_LCD2;

	if (core_power == NULL)
		return;
	dc = core_power->dc;

	num_levels = core_power->bl_prop[inst].num_backlight_levels;

	/* Allocate memory for ATIF output
	 * (do not want to use 256 bytes on the stack)
	 */
	ext_backlight_caps = (struct dm_acpi_atif_backlight_caps *)
		(kzalloc(sizeof(struct dm_acpi_atif_backlight_caps),
				GFP_KERNEL));

	if (ext_backlight_caps == NULL)
		return;

	/* Retrieve ACPI extended brightness caps */
	if (dm_query_extended_brightness_caps
		(dc->ctx, acpi_display_type, ext_backlight_caps)) {
		custom_curve_present = validate_ext_backlight_caps(ext_backlight_caps);
	}

	if (core_power->bl_prop[inst].use_custom_backlight_caps &&
			fill_custom_backlight_caps(
					core_power->bl_prop[inst].custom_backlight_caps_config_no,
					ext_backlight_caps)) {
		custom_curve_present = validate_ext_backlight_caps(ext_backlight_caps);
	}

	if (custom_curve_present) {
		unsigned int index = 1;
		unsigned int num_of_data_points = ext_backlight_caps->num_data_points;

		core_power->bl_prop[inst].ac_backlight_percent =
			ext_backlight_caps->ac_level_percentage;
		core_power->bl_prop[inst].dc_backlight_percent =
			ext_backlight_caps->dc_level_percentage;
		core_power->bl_prop[inst].backlight_lut[0] =
			backlight_8_to_16(
				ext_backlight_caps->min_input_signal);
		core_power->bl_prop[inst].backlight_lut[num_levels - 1] =
			backlight_8_to_16(
				ext_backlight_caps->max_input_signal);

		/* Filling translation table from data points -
		 * between every two provided data points we
		 * lineary interpolate missing values
		 */
		for (i = 0; i < num_of_data_points; i++) {
			unsigned int luminance =
				ext_backlight_caps->data_points[i].luminance;
			unsigned int signal_level =
				backlight_8_to_16(
					ext_backlight_caps->data_points[i].signal_level);

			/* Since luminance is a percentage, scale it by num_levels*/
			luminance = (luminance * num_levels) / 101;

			/* Lineary interpolate missing values */
			if (index < luminance) {
				unsigned int base_value =
					core_power->bl_prop[inst].backlight_lut[index-1];
				unsigned int delta_signal =
					signal_level - base_value;
				unsigned int delta_luma =
					luminance - index + 1;
				unsigned int step  = delta_signal;

				for (; index < luminance; index++) {
					core_power->bl_prop[inst].backlight_lut[index] =
						base_value + (step / delta_luma);
					step += delta_signal;
				}
			}

			/* Now [index == luminance],
			 * so we can add data point to the translation table
			 */
			core_power->bl_prop[inst].backlight_lut[index++] = signal_level;
		}

		/* Complete the final segment of interpolation -
		 * between last datapoint and maximum value
		 */
		if (index < num_levels - 1) {
			unsigned int base_value =
				core_power->bl_prop[inst].backlight_lut[index-1];
			unsigned int delta_signal =
				core_power->bl_prop[inst].backlight_lut[num_levels - 1] -
								base_value;
			unsigned int delta_luma = num_levels - index;
			unsigned int step = delta_signal;

			for (; index < num_levels - 1; index++) {
				core_power->bl_prop[inst].backlight_lut[index] =
						base_value + (step / delta_luma);
				step += delta_signal;
			}
		}
	/* Build backlight translation table based on default curve */
	} else {
		/* Defines default backlight curve F(x) = A(x*x) + Bx + C.
		 *
		 * Backlight curve should always  satisfy:
		 * F(0) = min, F(100) = max,
		 * So polynom coefficients are:
		 * A is 0.0255 - B/100 - min/10000 - (255-max)/10000 =
		 * (max - min)/10000 - B/100
		 * B is adjustable factor to modify the curve.
		 * Bigger B results in less concave curve.
		 * B range is [0..(max-min)/100]
		 * C is backlight minimum
		 */
		unsigned int backlight_curve_coeff_a_factor =
				num_levels * num_levels;
		unsigned int backlight_curve_coeff_b = num_levels;
		unsigned int delta =
			core_power->bl_prop[inst].backlight_lut[num_levels - 1] -
				core_power->bl_prop[inst].backlight_lut[0];
		unsigned int coeffC = core_power->bl_prop[inst].backlight_lut[0];
		unsigned int coeffB =
				(backlight_curve_coeff_b < delta ?
					backlight_curve_coeff_b : delta);
		unsigned long long coeffA = delta - coeffB; /* coeffB is B*100 */

		for (i = 1; i < num_levels - 1; i++) {
			uint64_t lut_val = div_u64(coeffA * i * i, backlight_curve_coeff_a_factor) +
				div_u64((uint64_t)coeffB * i, backlight_curve_coeff_b) + coeffC;

			ASSERT(lut_val <= 0xFFFFFFFF);
			core_power->bl_prop[inst].backlight_lut[i] = (unsigned int)lut_val;
		}
	}

	if (ext_backlight_caps != NULL)
		kfree(ext_backlight_caps);

	/* Successfully initialized */
	core_power->bl_prop[inst].backlight_caps_valid = true;
}

static void varibright_set_level(struct core_power *core_power)
{
	if (!core_power->varibright_prop.varibright_active ||
		!core_power->varibright_prop.varibright_user_enable)
		core_power->varibright_prop.varibright_hw_level = 0;
	else
		core_power->varibright_prop.varibright_hw_level =
			core_power->varibright_prop.varibright_level;
}

bool mod_power_hw_init_backlight(struct mod_power *mod_power)
{
	struct core_power *core_power = NULL;
	struct dc *dc = NULL;
	struct dmcu *dmcu = NULL;
	struct dmcu_iram_parameters params;
	unsigned int i;

	if (mod_power == NULL)
		return false;

	core_power = MOD_POWER_TO_CORE(mod_power);
	dc = core_power->dc;

	for (i = 0; i < core_power->edp_num; i++) {
		params.set = core_power->varibright_prop.varibright_config_setting;
		params.backlight_ramping_override = core_power->bl_prop[i].backlight_ramping_override;
		params.backlight_ramping_reduction = core_power->bl_prop[i].backlight_ramping_reduction;
		params.backlight_ramping_start = core_power->bl_prop[i].backlight_ramping_start;
		params.backlight_lut_array = core_power->bl_prop[i].backlight_lut;
		params.backlight_lut_array_size = core_power->bl_prop[i].num_backlight_levels;
		params.min_abm_backlight = core_power->bl_prop[i].min_abm_backlight;

		dmcu = dc->res_pool->dmcu;

		// In the case where abm is implemented on dmcub,
		// dmcu object will be null.
		// ABM 2.4 and up are implemented on dmcub.
		if (dmcu) {
			//DMCU does not support multiple eDP
			return dmcu_load_iram(dmcu, params);
		} else if (dc->ctx->dmub_srv) {
			if (!dmub_init_abm_config(dc->res_pool, params, i))
				return false;
		} else
			return false;
	}
	return true;
}

void mod_power_update_backlight_on_mode_change(
    struct core_power *core_power,
    struct dc_link *link,
    unsigned int panel_inst,
    uint8_t aux_inst,
    bool is_hdr)
{
    struct set_backlight_level_params backlight_level_params = { 0 };

		if (link->dpcd_sink_ext_caps.bits.hdr_aux_backlight_control == 1 ||
			link->dpcd_sink_ext_caps.bits.sdr_aux_backlight_control == 1)
			dc_link_set_backlight_level_nits(link, core_power->bl_state[panel_inst].isHDR,
				core_power->bl_state[panel_inst].backlight_millinit, 0);

		backlight_level_params.frame_ramp = 0;

		fill_backlight_level_params(core_power, &backlight_level_params, panel_inst, aux_inst,
			core_power->bl_state[panel_inst].backlight_pwm, link->backlight_control_type,
			core_power->bl_state[panel_inst].backlight_millinit, 0, is_hdr);

		dc_link_set_backlight_level(link, &backlight_level_params);
}

static bool set_backlight_millinits_aux(struct core_power *core_power,
		struct dc_stream_state *stream,
		unsigned int backlight_millinits,
		unsigned int transition_time_millisec,
		unsigned int inst)
{
	struct dc_link *link = NULL;

	if (core_power == NULL)
		return false;

	if (stream == NULL)
		return true;

	link = dc_stream_get_link(stream);

	return dc_link_set_backlight_level_nits(link, core_power->bl_state[inst].isHDR,
			backlight_millinits, transition_time_millisec);
}

static bool set_backlight(struct core_power *core_power,
		struct dc_stream_state *stream,
		struct set_backlight_level_params *backlight_level_params,
		unsigned int inst)
{
	bool retv = false;
	unsigned int frame_ramp = 0;
	unsigned int vsync_rate_hz;
	union dmcu_abm_set_bl_params params;
	const struct dc_link *link = NULL;
	unsigned int backlight_pwm_u16_16 = backlight_level_params->backlight_pwm_u16_16;
	unsigned int transition_time_millisec = backlight_level_params->transition_time_in_ms;

	if (core_power == NULL)
		return false;

	core_power->bl_state[inst].backlight_pwm = backlight_pwm_u16_16;

	if (stream == NULL)
		return true;

	if (stream->link->connector_signal != SIGNAL_TYPE_EDP)
		return false;

	if (transition_time_millisec != 0) {
		unsigned int v_total =
			(stream->adjust.v_total_max == 0) ? stream->timing.v_total : stream->adjust.v_total_max;

		vsync_rate_hz = (unsigned int)div_u64(div_u64((stream->
			timing.pix_clk_100hz * 100),
			v_total),
			stream->timing.h_total);

		if (core_power->bl_state[inst].smooth_brightness_enabled)
			frame_ramp = ((vsync_rate_hz *
				transition_time_millisec) + 500) / 1000;
	}

	core_power->bl_state[inst].frame_ramp = frame_ramp;
	params.u32All = 0;
	params.bits.gradual_change = (frame_ramp > 0);
	params.bits.frame_ramp = frame_ramp;
	link = dc_stream_get_link(stream);

	mod_power_set_psr_event(&core_power->mod_public, stream, true, psr_event_hw_programming, true);
	mod_power_set_replay_event(&core_power->mod_public, stream, true, replay_event_hw_programming, true);

	backlight_level_params->frame_ramp = params.u32All;
	retv = dc_link_set_backlight_level(link, backlight_level_params);

	mod_power_set_psr_event(&core_power->mod_public, stream, false, psr_event_hw_programming, false);
	mod_power_set_replay_event(&core_power->mod_public, stream, false, replay_event_hw_programming, false);

	return retv;
}

void fill_backlight_level_params(struct core_power *core_power,
	struct set_backlight_level_params *backlight_level_params,
	int panel_inst, uint8_t aux_inst, unsigned int backlight_pwm,
	enum backlight_control_type backlight_control_type,
	unsigned int backlight_millinit, unsigned int transition_time_millisec,
	bool is_hdr)
{
	struct pwr_backlight_properties *bl_prop = &core_power->bl_prop[panel_inst];

	backlight_level_params->aux_inst = aux_inst;
	backlight_level_params->backlight_pwm_u16_16 = backlight_pwm;
	backlight_level_params->control_type = backlight_control_type;
	backlight_level_params->backlight_millinits = backlight_millinit;
	backlight_level_params->transition_time_in_ms = transition_time_millisec;
	backlight_level_params->min_luminance = bl_prop->min_brightness_millinits;
	backlight_level_params->max_luminance = bl_prop->max_brightness_millinits;
	backlight_level_params->min_backlight_pwm = bl_prop->min_backlight_pwm;
	backlight_level_params->max_backlight_pwm = bl_prop->max_backlight_pwm;

	if (backlight_control_type == BACKLIGHT_CONTROL_AMD_AUX && !is_hdr)
		backlight_level_params->control_type = BACKLIGHT_CONTROL_PWM;
}

bool mod_power_set_backlight_nits(struct mod_power *mod_power,
		struct dc_stream_state *stream,
		unsigned int backlight_millinit,
		unsigned int transition_time_millisec,
		bool skip_aux,
		bool is_hdr)
{
	struct core_power *core_power = NULL;
	unsigned int backlight_pwm;
	unsigned int panel_inst = 0;
	struct set_backlight_level_params backlight_level_params = { 0 };
	const struct dc_link *link = NULL;
	uint8_t aux_inst = 0;

	if (mod_power == NULL)
		return false;

	core_power = MOD_POWER_TO_CORE(mod_power);
	link = dc_stream_get_link(stream);

	if (link->ctx->dc->config.dp_connector_no_native_i2c && link->no_ddc_pin) {
		aux_inst = (uint8_t)link->aux_hw_inst;
	} else {
		ASSERT(link->ddc->ddc_pin->hw_info.ddc_channel <= 0xFF);
		aux_inst = (uint8_t)link->ddc->ddc_pin->hw_info.ddc_channel;
	}

	if (!dc_get_edp_link_panel_inst(core_power->dc, stream->link, &panel_inst))
		return false;

	if (!skip_aux) {
		if (!set_backlight_millinits_aux(core_power, stream,
						backlight_millinit, transition_time_millisec, panel_inst))
			return false;
	}
// always send both AUX (above) and PWM (below)
	core_power->bl_state[panel_inst].backlight_millinit = backlight_millinit;

	core_power->bl_state[panel_inst].backlight_millipercent =
		backlight_millinit_to_millipercent(
				core_power, backlight_millinit, panel_inst);

	backlight_pwm = backlight_millinit_to_pwm(
				core_power, backlight_millinit, panel_inst);

	fill_backlight_level_params(core_power, &backlight_level_params, panel_inst, aux_inst, backlight_pwm,
		link->backlight_control_type, backlight_millinit, transition_time_millisec, is_hdr);

	return set_backlight(core_power, stream,
			&backlight_level_params, panel_inst);
}

bool mod_power_backlight_percent_to_nits(struct mod_power *mod_power,
		struct dc_stream_state *stream,
		unsigned int backlight_millipercent,
		unsigned int *backlight_millinit)
{
	struct core_power *core_power = NULL;
	unsigned int inst = 0;

	if (mod_power == NULL)
		return false;

	core_power = MOD_POWER_TO_CORE(mod_power);

	if (!dc_get_edp_link_panel_inst(core_power->dc, stream->link, &inst))
		return false;

	*backlight_millinit = backlight_millipercent_to_millinit(
			core_power, backlight_millipercent, inst);
	return true;
}

bool mod_power_backlight_nits_to_percent(struct mod_power *mod_power,
		struct dc_stream_state *stream,
		unsigned int backlight_millinit,
		unsigned int *backlight_millipercent)
{
	struct core_power *core_power = NULL;
	unsigned int inst = 0;

	if (mod_power == NULL)
		return false;

	core_power = MOD_POWER_TO_CORE(mod_power);

	if (!dc_get_edp_link_panel_inst(core_power->dc, stream->link, &inst))
		return false;

	*backlight_millipercent = backlight_millinit_to_millipercent(
			core_power, backlight_millinit, inst);
	return true;
}

bool mod_power_set_backlight_percent(struct mod_power *mod_power,
		struct dc_stream_state *stream,
		unsigned int backlight_millipercent,
		unsigned int transition_time_millisec,
		bool is_hdr)
{
	struct core_power *core_power = NULL;
	struct set_backlight_level_params backlight_level_params = { 0 };
	const struct dc_link *link = NULL;
	unsigned int backlight_pwm;
	unsigned int panel_inst = 0;
	uint8_t aux_inst = 0;

	if (mod_power == NULL)
		return false;

	core_power = MOD_POWER_TO_CORE(mod_power);
	link = dc_stream_get_link(stream);
	if (link->ctx->dc->config.dp_connector_no_native_i2c && link->no_ddc_pin) {
		aux_inst = (uint8_t)link->aux_hw_inst;
	} else {
		ASSERT(link->ddc->ddc_pin->hw_info.ddc_channel <= 0xFF);
		aux_inst = (uint8_t)link->ddc->ddc_pin->hw_info.ddc_channel;
	}

	if (!dc_get_edp_link_panel_inst(core_power->dc, stream->link, &panel_inst))
		return false;
	core_power->bl_state[panel_inst].backlight_millipercent = backlight_millipercent;

	core_power->bl_state[panel_inst].backlight_millinit =
		backlight_millipercent_to_millinit(
				core_power, backlight_millipercent, panel_inst);

	backlight_pwm = backlight_millipercent_to_pwm(
				core_power, backlight_millipercent, panel_inst);

	fill_backlight_level_params(core_power, &backlight_level_params, panel_inst,
		aux_inst, backlight_pwm, link->backlight_control_type,
		core_power->bl_state[panel_inst].backlight_millinit, transition_time_millisec, is_hdr);

	return set_backlight(core_power, stream,
			&backlight_level_params, panel_inst);
}

void mod_power_update_backlight(struct mod_power *mod_power,
		struct dc_stream_state *stream,
		unsigned int backlight_millipercent)
{
	struct core_power *core_power = NULL;
	unsigned int inst = 0;

	if (mod_power == NULL)
		return;

	core_power = MOD_POWER_TO_CORE(mod_power);

	if (!dc_get_edp_link_panel_inst(core_power->dc, stream->link, &inst))
		return;
	core_power->bl_state[inst].backlight_millipercent = backlight_millipercent;

	core_power->bl_state[inst].backlight_millinit =
		backlight_millipercent_to_millinit(
			core_power, backlight_millipercent, inst);

	core_power->bl_state[inst].backlight_pwm = backlight_millipercent_to_pwm(
		core_power, backlight_millipercent, inst);
}

void mod_power_update_backlight_nits(struct mod_power *mod_power,
		struct dc_stream_state *stream,
		unsigned int backlight_millinit)
{
	struct core_power *core_power = NULL;
	unsigned int inst = 0;

	if (mod_power == NULL)
		return;

	core_power = MOD_POWER_TO_CORE(mod_power);

	if (!dc_get_edp_link_panel_inst(core_power->dc, stream->link, &inst))
		return;

	core_power->bl_state[inst].backlight_millinit = backlight_millinit;

	core_power->bl_state[inst].backlight_millipercent = backlight_millinit_to_millipercent(
		core_power, backlight_millinit, inst);
	core_power->bl_state[inst].backlight_pwm = backlight_millinit_to_pwm(
		core_power, backlight_millinit, inst);
}

bool mod_power_get_backlight_pwm(struct mod_power *mod_power,
		unsigned int *backlight_pwm,
		unsigned int inst)
{
	struct core_power *core_power = NULL;

	if (mod_power == NULL)
		return false;

	core_power = MOD_POWER_TO_CORE(mod_power);

	*backlight_pwm = core_power->bl_state[inst].backlight_pwm;

	return true;
}

bool mod_power_get_backlight_nits(struct mod_power *mod_power,
		unsigned int *backlight_millinit,
		unsigned int inst)
{
	struct core_power *core_power = NULL;

	if (mod_power == NULL)
		return false;

	core_power = MOD_POWER_TO_CORE(mod_power);

	*backlight_millinit = core_power->bl_state[inst].backlight_millinit;

	return true;
}

bool mod_power_get_backlight_percent(struct mod_power *mod_power,
		unsigned int *backlight_millipercent,
		unsigned int inst)
{
	struct core_power *core_power = NULL;

	if (mod_power == NULL)
		return false;

	core_power = MOD_POWER_TO_CORE(mod_power);

	*backlight_millipercent = core_power->bl_state[inst].backlight_millipercent;

	return true;
}

bool mod_power_get_hw_target_backlight_pwm_nits(struct mod_power *mod_power,
		const struct dc_link *link,
		unsigned int *backlight_millinit,
		unsigned int inst)
{
	struct core_power *core_power = NULL;
	unsigned int backlight_u16_16 = 0;

	if (mod_power == NULL)
		return false;

	core_power = MOD_POWER_TO_CORE(mod_power);

	if (mod_power_get_hw_target_backlight_pwm(mod_power, link,
							&backlight_u16_16)) {
		*backlight_millinit =
			backlight_pwm_to_millinit(core_power,
					backlight_u16_16, inst);
		return true;
	}
	return false;
}

bool mod_power_get_hw_target_backlight_pwm_percent(struct mod_power *mod_power,
		const struct dc_link *link,
		unsigned int *backlight_millipercent,
		unsigned int inst)
{
	struct core_power *core_power = NULL;
	unsigned int backlight_u16_16 = 0;

	if (mod_power == NULL)
		return false;

	core_power = MOD_POWER_TO_CORE(mod_power);

	if (mod_power_get_hw_target_backlight_pwm(mod_power, link,
							&backlight_u16_16)) {
		*backlight_millipercent =
			backlight_pwm_to_millipercent(core_power,
					backlight_u16_16, inst);
		return true;
	}
	return false;
}

bool mod_power_get_hw_target_backlight_pwm(struct mod_power *mod_power,
		const struct dc_link *link,
		unsigned int *backlight_u16_16)
{
	if (mod_power == NULL)
		return false;

	*backlight_u16_16 = dc_link_get_target_backlight_pwm(link);

	return true;
}

bool mod_power_get_hw_backlight_pwm_nits(struct mod_power *mod_power,
		const struct dc_link *link,
		unsigned int *backlight_millinit,
		unsigned int inst)
{
	struct core_power *core_power = NULL;
	unsigned int backlight_u16_16 = 0;

	if (mod_power == NULL)
		return false;

	core_power = MOD_POWER_TO_CORE(mod_power);

	if (mod_power_get_hw_backlight_pwm(mod_power, link, &backlight_u16_16)) {
		*backlight_millinit =
			backlight_pwm_to_millinit(core_power,
					backlight_u16_16, inst);
		return true;
	}
	return false;
}

bool mod_power_get_hw_backlight_aux_nits(struct mod_power *mod_power,
		struct dc_stream_state **streams, int num_streams,
		unsigned int *backlight_millinit_avg,
		unsigned int *backlight_millinit_peak)
{
	struct core_power *core_power = NULL;
	struct dc_link *link = NULL;
	int stream_index;

	if (mod_power == NULL)
		return false;

	core_power = MOD_POWER_TO_CORE(mod_power);

	if (core_power == NULL)
		return false;

	if (num_streams < 1)
		return true;

	for (stream_index = 0; stream_index < num_streams; stream_index++)
		if (streams[stream_index]->link->connector_signal == SIGNAL_TYPE_EDP ||
				streams[stream_index]->link->connector_signal == SIGNAL_TYPE_DISPLAY_PORT)
			break;

	if (stream_index == num_streams)
		return false;

	link = dc_stream_get_link(streams[stream_index]);
	if (link->dpcd_sink_ext_caps.bits.hdr_aux_backlight_control == 0)
		return false;

	return dc_link_get_backlight_level_nits(link, backlight_millinit_avg,
			backlight_millinit_peak);
}

bool mod_power_get_hw_backlight_pwm_percent(struct mod_power *mod_power,
		const struct dc_link *link,
		unsigned int *backlight_millipercent,
		unsigned int inst)
{
	struct core_power *core_power = NULL;
	unsigned int backlight_u16_16 = 0;

	if (mod_power == NULL)
		return false;

	core_power = MOD_POWER_TO_CORE(mod_power);

	if (mod_power_get_hw_backlight_pwm(mod_power, link, &backlight_u16_16)) {
		*backlight_millipercent =
			backlight_pwm_to_millipercent(core_power,
					backlight_u16_16, inst);
		return true;
	}
	return false;
}

bool mod_power_get_hw_backlight_pwm(struct mod_power *mod_power,
		const struct dc_link *link,
		unsigned int *backlight_u16_16)
{
	if (mod_power == NULL)
		return false;

	*backlight_u16_16 = dc_link_get_backlight_level(link);

	return true;
}

bool mod_power_get_panel_backlight_boundaries(
				struct mod_power *mod_power,
				unsigned int *out_min_backlight,
				unsigned int *out_max_backlight,
				unsigned int *out_ac_backlight_percent,
				unsigned int *out_dc_backlight_percent,
				unsigned int inst)
{
	struct core_power *core_power = NULL;

	if (mod_power == NULL)
		return false;

	core_power = MOD_POWER_TO_CORE(mod_power);

	/* If cache was successfully updated,
	 * copy the values to output structure and return success
	 */
	if (core_power->bl_prop[inst].backlight_caps_valid) {
		*out_min_backlight = core_power->bl_prop[inst].backlight_lut[0];
		*out_max_backlight =
			core_power->bl_prop[inst].backlight_lut[
				core_power->bl_prop[inst].num_backlight_levels - 1];
		*out_ac_backlight_percent =
			core_power->bl_prop[inst].ac_backlight_percent;
		*out_dc_backlight_percent =
			core_power->bl_prop[inst].dc_backlight_percent;

		return true;
	}

	return false;
}

bool mod_power_set_smooth_brightness(struct mod_power *mod_power,
		bool enable_brightness,
		unsigned int inst)
{
	struct core_power *core_power = NULL;

	if (mod_power == NULL)
		return false;

	core_power = MOD_POWER_TO_CORE(mod_power);

	core_power->bl_state[inst].smooth_brightness_enabled = enable_brightness;

	return true;
}

bool mod_power_varibright_feature_enable(struct mod_power *mod_power, bool enable,
		struct dc_stream_update *stream_update)
{
	struct core_power *core_power = NULL;

	if (mod_power == NULL)
		return false;

	core_power = MOD_POWER_TO_CORE(mod_power);
	core_power->varibright_prop.varibright_user_enable = enable;

	/* find abm hw level to program, and save in stream update */
	varibright_set_level(core_power);
	*stream_update->abm_level = core_power->varibright_prop.varibright_hw_level;

	DC_TRACE_LEVEL_MESSAGEP(DAL_TRACE_LEVEL_INFORMATION,
						WPP_BIT_FLAG_Backlight_ABM,
						">ABM feature enable: enable=%u su->varibright_level=%u varibright_hw_level=%u",
						(unsigned int) enable,
						*stream_update->abm_level,
						core_power->varibright_prop.varibright_hw_level);
	return true;
}

bool mod_power_varibright_activate(struct mod_power *mod_power,
		bool activate,
		struct dc_stream_update *stream_update)
{
	struct core_power *core_power = NULL;

	if (mod_power == NULL)
		return false;

	core_power = MOD_POWER_TO_CORE(mod_power);
	core_power->varibright_prop.varibright_active = activate;

	/* find abm hw level to program, and save in stream update */
	varibright_set_level(core_power);
	*stream_update->abm_level = core_power->varibright_prop.varibright_hw_level;

	DC_TRACE_LEVEL_MESSAGEP(DAL_TRACE_LEVEL_INFORMATION,
						WPP_BIT_FLAG_Backlight_ABM,
						">ABM activate: activate=%u su->varibright_level=%u",
						(unsigned int) activate,
						*stream_update->abm_level);
	return true;
}
bool mod_power_varibright_set_level(struct mod_power *mod_power, unsigned int level,
		struct dc_stream_update *stream_update)
{
	struct core_power *core_power = NULL;

	if (mod_power == NULL)
		return false;

	core_power = MOD_POWER_TO_CORE(mod_power);
	core_power->varibright_prop.varibright_level = level;
	core_power->varibright_prop.varibright_hw_level = level;

	/* find abm hw level to program, and save in stream update */
	varibright_set_level(core_power);
	*stream_update->abm_level = core_power->varibright_prop.varibright_hw_level;

	DC_TRACE_LEVEL_MESSAGEP(DAL_TRACE_LEVEL_INFORMATION,
						WPP_BIT_FLAG_Backlight_ABM,
						">ABM set level: level=%u -> (varibright_level=%u varibright_hw_level=%u) -> su->varibright_level=%u",
						level,
						core_power->varibright_prop.varibright_level,
						core_power->varibright_prop.varibright_hw_level,
						*stream_update->abm_level);
	return true;
}

bool mod_power_varibright_set_hw_level(struct mod_power *mod_power, unsigned int level,
		struct dc_stream_update *stream_update)
{
	struct core_power *core_power = NULL;

	if (mod_power == NULL)
		return false;

	core_power = MOD_POWER_TO_CORE(mod_power);

	if (level == 0 || level == ABM_LEVEL_IMMEDIATE_DISABLE)
		core_power->varibright_prop.varibright_active = 0;
	else
		core_power->varibright_prop.varibright_active = 1;
	core_power->varibright_prop.varibright_hw_level = level;
	*stream_update->abm_level = core_power->varibright_prop.varibright_hw_level;

	DC_TRACE_LEVEL_MESSAGEP(DAL_TRACE_LEVEL_INFORMATION,
						WPP_BIT_FLAG_Backlight_ABM,
						">ABM set level: level=%u -> (varibright_level=%u varibright_hw_level=%u) -> su->varibright_level=%u",
						level,
						core_power->varibright_prop.varibright_level,
						core_power->varibright_prop.varibright_hw_level,
						*stream_update->abm_level);
	return true;
}

bool mod_power_get_varibright_level(struct mod_power *mod_power,
		unsigned int *varibright_level)
{
	struct core_power *core_power = NULL;

	if (mod_power == NULL)
		return false;

	core_power = MOD_POWER_TO_CORE(mod_power);

	*varibright_level = core_power->varibright_prop.varibright_level;

	DC_TRACE_LEVEL_MESSAGEP(DAL_TRACE_LEVEL_INFORMATION,
						WPP_BIT_FLAG_Backlight_ABM,
						">get varibright level: cp->varibright_level=%u",
						*varibright_level);
	return true;

}

bool mod_power_get_varibright_hw_level(struct mod_power *mod_power,
		unsigned int *varibright_level)
{
	struct core_power *core_power = NULL;

	if (mod_power == NULL)
		return false;

	core_power = MOD_POWER_TO_CORE(mod_power);

	*varibright_level = core_power->varibright_prop.varibright_hw_level;
	DC_TRACE_LEVEL_MESSAGEP(DAL_TRACE_LEVEL_INFORMATION,
						WPP_BIT_FLAG_Backlight_ABM,
						">get varibright HW level: hw_level=%u",
						*varibright_level);
	return true;
}

bool mod_power_get_varibright_default_level(struct mod_power *mod_power,
		unsigned int *varibright_level)
{
	struct core_power *core_power = NULL;

	if (mod_power == NULL)
		return false;

	core_power = MOD_POWER_TO_CORE(mod_power);

	*varibright_level = core_power->varibright_prop.def_varibright_level;
	DC_TRACE_LEVEL_MESSAGEP(DAL_TRACE_LEVEL_INFORMATION,
						WPP_BIT_FLAG_Backlight_ABM,
						">get varibright default level: def_varibright_level=%u",
						*varibright_level);
	return true;
}

bool mod_power_get_varibright_enable(struct mod_power *mod_power,
		bool *varibright_enable)
{
	struct core_power *core_power = NULL;

	if (mod_power == NULL)
		return false;

	core_power = MOD_POWER_TO_CORE(mod_power);

	*varibright_enable = core_power->varibright_prop.varibright_user_enable;
	DC_TRACE_LEVEL_MESSAGEP(DAL_TRACE_LEVEL_INFORMATION,
				WPP_BIT_FLAG_Backlight_ABM,
				">get varibright enable state: varibright_user_enable=%u",
				(unsigned int) (*varibright_enable));
	return true;
}

bool mod_power_is_abm_active(struct mod_power *mod_power,
		const struct dc_link *link,
		unsigned int inst)
{
	unsigned int user_backlight = 0;
	unsigned int current_backlight = 0;
	bool is_active = false;

	if (mod_power == NULL)
		return false;

	mod_power_get_backlight_pwm(mod_power, &user_backlight, inst);
	mod_power_get_hw_backlight_pwm(mod_power, link,	&current_backlight);

	if (user_backlight != current_backlight)
		is_active = true;
	else
		is_active = false;
	DC_TRACE_LEVEL_MESSAGEP(DAL_TRACE_LEVEL_INFORMATION,
						WPP_BIT_FLAG_Backlight_ABM,
						">get ABM active state: is_active=%u (user_backlight_pwm=%u, current_backlight_pwm=%u)",
						(unsigned int)is_active,
						user_backlight,
						current_backlight);
	return is_active;
}

static void fill_backlight_transform_table(struct dmcu_iram_parameters params,
		struct iram_table_v_2 *table)
{
	unsigned int i;
	unsigned int num_entries = NUM_BL_CURVE_SEGS;
	unsigned int lut_index;

	table->backlight_thresholds[0] = 0;
	ASSERT(params.backlight_lut_array[0] <= 0xFFFF);
	table->backlight_offsets[0] = (uint16_t)params.backlight_lut_array[0];
	table->backlight_thresholds[num_entries-1] = 0xFFFF;
	ASSERT(params.backlight_lut_array[params.backlight_lut_array_size - 1] <= 0xFFFF);
	table->backlight_offsets[num_entries-1] =
		(uint16_t)params.backlight_lut_array[params.backlight_lut_array_size - 1];

	/* Setup all brightness levels between 0% and 100% exclusive
	 * Fills brightness-to-backlight transform table. Backlight custom curve
	 * describes transform from brightness to backlight. It will be defined
	 * as set of thresholds and set of offsets, together, implying
	 * extrapolation of custom curve into 16 uniformly spanned linear
	 * segments.  Each threshold/offset represented by 16 bit entry in
	 * format U4.10.
	 */
	for (i = 1; i+1 < num_entries; i++) {
		lut_index = (params.backlight_lut_array_size - 1) * i / (num_entries - 1);

		ASSERT(lut_index < params.backlight_lut_array_size);

		unsigned int threshold_val = DIV_ROUNDUP((i * 65536), num_entries);
		unsigned int offset_val = params.backlight_lut_array[lut_index];

		ASSERT(threshold_val <= 0xFFFF);
		ASSERT(offset_val <= 0xFFFF);

		table->backlight_thresholds[i] = cpu_to_be16((uint16_t)threshold_val);
		table->backlight_offsets[i]    = cpu_to_be16((uint16_t)offset_val);
	}
}

static void fill_backlight_transform_table_v_2_2(struct dmcu_iram_parameters params,
		struct iram_table_v_2_2 *table, bool big_endian)
{
	unsigned int i;
	unsigned int num_entries = NUM_BL_CURVE_SEGS;
	unsigned int lut_index;

	table->backlight_thresholds[0] = 0;
	ASSERT(params.backlight_lut_array[0] <= 0xFFFF);
	table->backlight_offsets[0] = (uint16_t)params.backlight_lut_array[0];
	table->backlight_thresholds[num_entries-1] = 0xFFFF;
	ASSERT(params.backlight_lut_array[params.backlight_lut_array_size - 1] <= 0xFFFF);
	table->backlight_offsets[num_entries-1] =
		(uint16_t)params.backlight_lut_array[params.backlight_lut_array_size - 1];

	/* Setup all brightness levels between 0% and 100% exclusive
	 * Fills brightness-to-backlight transform table. Backlight custom curve
	 * describes transform from brightness to backlight. It will be defined
	 * as set of thresholds and set of offsets, together, implying
	 * extrapolation of custom curve into 16 uniformly spanned linear
	 * segments.  Each threshold/offset represented by 16 bit entry in
	 * format U4.10.
	 */
	for (i = 1; i+1 < num_entries; i++) {
		lut_index = DIV_ROUNDUP((i * params.backlight_lut_array_size), num_entries);
		ASSERT(lut_index < params.backlight_lut_array_size);

		unsigned int threshold_val = DIV_ROUNDUP((i * 65536), num_entries);
		unsigned int offset_val = params.backlight_lut_array[lut_index];

		ASSERT(threshold_val <= 0xFFFF);
		ASSERT(offset_val <= 0xFFFF);

		table->backlight_thresholds[i] = (big_endian) ?
			cpu_to_be16((uint16_t)threshold_val) : cpu_to_le16((uint16_t)threshold_val);
		table->backlight_offsets[i] = (big_endian) ?
			cpu_to_be16((uint16_t)offset_val) : cpu_to_le16((uint16_t)offset_val);
	}
}

static void fill_iram_v_2(struct iram_table_v_2 *ram_table, struct dmcu_iram_parameters params)
{
	unsigned int set = params.set;

	ram_table->min_abm_backlight =
			cpu_to_be16(params.min_abm_backlight);
	ram_table->deviation_gain = 0xb3;

	ram_table->blRampReduction =
		cpu_to_be16(params.backlight_ramping_reduction);
	ram_table->blRampStart =
		cpu_to_be16(params.backlight_ramping_start);

	ram_table->min_reduction[0][0] = min_reduction_table[abm_config[set][0]];
	ram_table->min_reduction[1][0] = min_reduction_table[abm_config[set][0]];
	ram_table->min_reduction[2][0] = min_reduction_table[abm_config[set][0]];
	ram_table->min_reduction[3][0] = min_reduction_table[abm_config[set][0]];
	ram_table->min_reduction[4][0] = min_reduction_table[abm_config[set][0]];
	ram_table->max_reduction[0][0] = max_reduction_table[abm_config[set][0]];
	ram_table->max_reduction[1][0] = max_reduction_table[abm_config[set][0]];
	ram_table->max_reduction[2][0] = max_reduction_table[abm_config[set][0]];
	ram_table->max_reduction[3][0] = max_reduction_table[abm_config[set][0]];
	ram_table->max_reduction[4][0] = max_reduction_table[abm_config[set][0]];

	ram_table->min_reduction[0][1] = min_reduction_table[abm_config[set][1]];
	ram_table->min_reduction[1][1] = min_reduction_table[abm_config[set][1]];
	ram_table->min_reduction[2][1] = min_reduction_table[abm_config[set][1]];
	ram_table->min_reduction[3][1] = min_reduction_table[abm_config[set][1]];
	ram_table->min_reduction[4][1] = min_reduction_table[abm_config[set][1]];
	ram_table->max_reduction[0][1] = max_reduction_table[abm_config[set][1]];
	ram_table->max_reduction[1][1] = max_reduction_table[abm_config[set][1]];
	ram_table->max_reduction[2][1] = max_reduction_table[abm_config[set][1]];
	ram_table->max_reduction[3][1] = max_reduction_table[abm_config[set][1]];
	ram_table->max_reduction[4][1] = max_reduction_table[abm_config[set][1]];

	ram_table->min_reduction[0][2] = min_reduction_table[abm_config[set][2]];
	ram_table->min_reduction[1][2] = min_reduction_table[abm_config[set][2]];
	ram_table->min_reduction[2][2] = min_reduction_table[abm_config[set][2]];
	ram_table->min_reduction[3][2] = min_reduction_table[abm_config[set][2]];
	ram_table->min_reduction[4][2] = min_reduction_table[abm_config[set][2]];
	ram_table->max_reduction[0][2] = max_reduction_table[abm_config[set][2]];
	ram_table->max_reduction[1][2] = max_reduction_table[abm_config[set][2]];
	ram_table->max_reduction[2][2] = max_reduction_table[abm_config[set][2]];
	ram_table->max_reduction[3][2] = max_reduction_table[abm_config[set][2]];
	ram_table->max_reduction[4][2] = max_reduction_table[abm_config[set][2]];

	ram_table->min_reduction[0][3] = min_reduction_table[abm_config[set][3]];
	ram_table->min_reduction[1][3] = min_reduction_table[abm_config[set][3]];
	ram_table->min_reduction[2][3] = min_reduction_table[abm_config[set][3]];
	ram_table->min_reduction[3][3] = min_reduction_table[abm_config[set][3]];
	ram_table->min_reduction[4][3] = min_reduction_table[abm_config[set][3]];
	ram_table->max_reduction[0][3] = max_reduction_table[abm_config[set][3]];
	ram_table->max_reduction[1][3] = max_reduction_table[abm_config[set][3]];
	ram_table->max_reduction[2][3] = max_reduction_table[abm_config[set][3]];
	ram_table->max_reduction[3][3] = max_reduction_table[abm_config[set][3]];
	ram_table->max_reduction[4][3] = max_reduction_table[abm_config[set][3]];

	ram_table->bright_pos_gain[0][0] = 0x20;
	ram_table->bright_pos_gain[0][1] = 0x20;
	ram_table->bright_pos_gain[0][2] = 0x20;
	ram_table->bright_pos_gain[0][3] = 0x20;
	ram_table->bright_pos_gain[1][0] = 0x20;
	ram_table->bright_pos_gain[1][1] = 0x20;
	ram_table->bright_pos_gain[1][2] = 0x20;
	ram_table->bright_pos_gain[1][3] = 0x20;
	ram_table->bright_pos_gain[2][0] = 0x20;
	ram_table->bright_pos_gain[2][1] = 0x20;
	ram_table->bright_pos_gain[2][2] = 0x20;
	ram_table->bright_pos_gain[2][3] = 0x20;
	ram_table->bright_pos_gain[3][0] = 0x20;
	ram_table->bright_pos_gain[3][1] = 0x20;
	ram_table->bright_pos_gain[3][2] = 0x20;
	ram_table->bright_pos_gain[3][3] = 0x20;
	ram_table->bright_pos_gain[4][0] = 0x20;
	ram_table->bright_pos_gain[4][1] = 0x20;
	ram_table->bright_pos_gain[4][2] = 0x20;
	ram_table->bright_pos_gain[4][3] = 0x20;
	ram_table->bright_neg_gain[0][0] = 0x00;
	ram_table->bright_neg_gain[0][1] = 0x00;
	ram_table->bright_neg_gain[0][2] = 0x00;
	ram_table->bright_neg_gain[0][3] = 0x00;
	ram_table->bright_neg_gain[1][0] = 0x00;
	ram_table->bright_neg_gain[1][1] = 0x00;
	ram_table->bright_neg_gain[1][2] = 0x00;
	ram_table->bright_neg_gain[1][3] = 0x00;
	ram_table->bright_neg_gain[2][0] = 0x00;
	ram_table->bright_neg_gain[2][1] = 0x00;
	ram_table->bright_neg_gain[2][2] = 0x00;
	ram_table->bright_neg_gain[2][3] = 0x00;
	ram_table->bright_neg_gain[3][0] = 0x00;
	ram_table->bright_neg_gain[3][1] = 0x00;
	ram_table->bright_neg_gain[3][2] = 0x00;
	ram_table->bright_neg_gain[3][3] = 0x00;
	ram_table->bright_neg_gain[4][0] = 0x00;
	ram_table->bright_neg_gain[4][1] = 0x00;
	ram_table->bright_neg_gain[4][2] = 0x00;
	ram_table->bright_neg_gain[4][3] = 0x00;
	ram_table->dark_pos_gain[0][0] = 0x00;
	ram_table->dark_pos_gain[0][1] = 0x00;
	ram_table->dark_pos_gain[0][2] = 0x00;
	ram_table->dark_pos_gain[0][3] = 0x00;
	ram_table->dark_pos_gain[1][0] = 0x00;
	ram_table->dark_pos_gain[1][1] = 0x00;
	ram_table->dark_pos_gain[1][2] = 0x00;
	ram_table->dark_pos_gain[1][3] = 0x00;
	ram_table->dark_pos_gain[2][0] = 0x00;
	ram_table->dark_pos_gain[2][1] = 0x00;
	ram_table->dark_pos_gain[2][2] = 0x00;
	ram_table->dark_pos_gain[2][3] = 0x00;
	ram_table->dark_pos_gain[3][0] = 0x00;
	ram_table->dark_pos_gain[3][1] = 0x00;
	ram_table->dark_pos_gain[3][2] = 0x00;
	ram_table->dark_pos_gain[3][3] = 0x00;
	ram_table->dark_pos_gain[4][0] = 0x00;
	ram_table->dark_pos_gain[4][1] = 0x00;
	ram_table->dark_pos_gain[4][2] = 0x00;
	ram_table->dark_pos_gain[4][3] = 0x00;
	ram_table->dark_neg_gain[0][0] = 0x00;
	ram_table->dark_neg_gain[0][1] = 0x00;
	ram_table->dark_neg_gain[0][2] = 0x00;
	ram_table->dark_neg_gain[0][3] = 0x00;
	ram_table->dark_neg_gain[1][0] = 0x00;
	ram_table->dark_neg_gain[1][1] = 0x00;
	ram_table->dark_neg_gain[1][2] = 0x00;
	ram_table->dark_neg_gain[1][3] = 0x00;
	ram_table->dark_neg_gain[2][0] = 0x00;
	ram_table->dark_neg_gain[2][1] = 0x00;
	ram_table->dark_neg_gain[2][2] = 0x00;
	ram_table->dark_neg_gain[2][3] = 0x00;
	ram_table->dark_neg_gain[3][0] = 0x00;
	ram_table->dark_neg_gain[3][1] = 0x00;
	ram_table->dark_neg_gain[3][2] = 0x00;
	ram_table->dark_neg_gain[3][3] = 0x00;
	ram_table->dark_neg_gain[4][0] = 0x00;
	ram_table->dark_neg_gain[4][1] = 0x00;
	ram_table->dark_neg_gain[4][2] = 0x00;
	ram_table->dark_neg_gain[4][3] = 0x00;

	ram_table->iir_curve[0] = 0x65;
	ram_table->iir_curve[1] = 0x65;
	ram_table->iir_curve[2] = 0x65;
	ram_table->iir_curve[3] = 0x65;
	ram_table->iir_curve[4] = 0x65;

	//Gamma 2.4
	ram_table->crgb_thresh[0] = cpu_to_be16(0x13b6);
	ram_table->crgb_thresh[1] = cpu_to_be16(0x1648);
	ram_table->crgb_thresh[2] = cpu_to_be16(0x18e3);
	ram_table->crgb_thresh[3] = cpu_to_be16(0x1b41);
	ram_table->crgb_thresh[4] = cpu_to_be16(0x1d46);
	ram_table->crgb_thresh[5] = cpu_to_be16(0x1f21);
	ram_table->crgb_thresh[6] = cpu_to_be16(0x2167);
	ram_table->crgb_thresh[7] = cpu_to_be16(0x2384);
	ram_table->crgb_offset[0] = cpu_to_be16(0x2999);
	ram_table->crgb_offset[1] = cpu_to_be16(0x3999);
	ram_table->crgb_offset[2] = cpu_to_be16(0x4666);
	ram_table->crgb_offset[3] = cpu_to_be16(0x5999);
	ram_table->crgb_offset[4] = cpu_to_be16(0x6333);
	ram_table->crgb_offset[5] = cpu_to_be16(0x7800);
	ram_table->crgb_offset[6] = cpu_to_be16(0x8c00);
	ram_table->crgb_offset[7] = cpu_to_be16(0xa000);
	ram_table->crgb_slope[0]  = cpu_to_be16(0x3147);
	ram_table->crgb_slope[1]  = cpu_to_be16(0x2978);
	ram_table->crgb_slope[2]  = cpu_to_be16(0x23a2);
	ram_table->crgb_slope[3]  = cpu_to_be16(0x1f55);
	ram_table->crgb_slope[4]  = cpu_to_be16(0x1c63);
	ram_table->crgb_slope[5]  = cpu_to_be16(0x1a0f);
	ram_table->crgb_slope[6]  = cpu_to_be16(0x178d);
	ram_table->crgb_slope[7]  = cpu_to_be16(0x15ab);

	fill_backlight_transform_table(
			params, ram_table);
}

static void fill_iram_v_2_2(struct iram_table_v_2_2 *ram_table, struct dmcu_iram_parameters params)
{
	unsigned int set = params.set;

	ram_table->flags = 0x0;

	ram_table->min_abm_backlight =
			cpu_to_be16(params.min_abm_backlight);

	ram_table->deviation_gain[0] = 0xb3;
	ram_table->deviation_gain[1] = 0xa8;
	ram_table->deviation_gain[2] = 0x98;
	ram_table->deviation_gain[3] = 0x68;

	ram_table->min_reduction[0][0] = min_reduction_table_v_2_2[abm_config[set][0]];
	ram_table->min_reduction[1][0] = min_reduction_table_v_2_2[abm_config[set][0]];
	ram_table->min_reduction[2][0] = min_reduction_table_v_2_2[abm_config[set][0]];
	ram_table->min_reduction[3][0] = min_reduction_table_v_2_2[abm_config[set][0]];
	ram_table->min_reduction[4][0] = min_reduction_table_v_2_2[abm_config[set][0]];
	ram_table->max_reduction[0][0] = max_reduction_table_v_2_2[abm_config[set][0]];
	ram_table->max_reduction[1][0] = max_reduction_table_v_2_2[abm_config[set][0]];
	ram_table->max_reduction[2][0] = max_reduction_table_v_2_2[abm_config[set][0]];
	ram_table->max_reduction[3][0] = max_reduction_table_v_2_2[abm_config[set][0]];
	ram_table->max_reduction[4][0] = max_reduction_table_v_2_2[abm_config[set][0]];

	ram_table->min_reduction[0][1] = min_reduction_table_v_2_2[abm_config[set][1]];
	ram_table->min_reduction[1][1] = min_reduction_table_v_2_2[abm_config[set][1]];
	ram_table->min_reduction[2][1] = min_reduction_table_v_2_2[abm_config[set][1]];
	ram_table->min_reduction[3][1] = min_reduction_table_v_2_2[abm_config[set][1]];
	ram_table->min_reduction[4][1] = min_reduction_table_v_2_2[abm_config[set][1]];
	ram_table->max_reduction[0][1] = max_reduction_table_v_2_2[abm_config[set][1]];
	ram_table->max_reduction[1][1] = max_reduction_table_v_2_2[abm_config[set][1]];
	ram_table->max_reduction[2][1] = max_reduction_table_v_2_2[abm_config[set][1]];
	ram_table->max_reduction[3][1] = max_reduction_table_v_2_2[abm_config[set][1]];
	ram_table->max_reduction[4][1] = max_reduction_table_v_2_2[abm_config[set][1]];

	ram_table->min_reduction[0][2] = min_reduction_table_v_2_2[abm_config[set][2]];
	ram_table->min_reduction[1][2] = min_reduction_table_v_2_2[abm_config[set][2]];
	ram_table->min_reduction[2][2] = min_reduction_table_v_2_2[abm_config[set][2]];
	ram_table->min_reduction[3][2] = min_reduction_table_v_2_2[abm_config[set][2]];
	ram_table->min_reduction[4][2] = min_reduction_table_v_2_2[abm_config[set][2]];
	ram_table->max_reduction[0][2] = max_reduction_table_v_2_2[abm_config[set][2]];
	ram_table->max_reduction[1][2] = max_reduction_table_v_2_2[abm_config[set][2]];
	ram_table->max_reduction[2][2] = max_reduction_table_v_2_2[abm_config[set][2]];
	ram_table->max_reduction[3][2] = max_reduction_table_v_2_2[abm_config[set][2]];
	ram_table->max_reduction[4][2] = max_reduction_table_v_2_2[abm_config[set][2]];

	ram_table->min_reduction[0][3] = min_reduction_table_v_2_2[abm_config[set][3]];
	ram_table->min_reduction[1][3] = min_reduction_table_v_2_2[abm_config[set][3]];
	ram_table->min_reduction[2][3] = min_reduction_table_v_2_2[abm_config[set][3]];
	ram_table->min_reduction[3][3] = min_reduction_table_v_2_2[abm_config[set][3]];
	ram_table->min_reduction[4][3] = min_reduction_table_v_2_2[abm_config[set][3]];
	ram_table->max_reduction[0][3] = max_reduction_table_v_2_2[abm_config[set][3]];
	ram_table->max_reduction[1][3] = max_reduction_table_v_2_2[abm_config[set][3]];
	ram_table->max_reduction[2][3] = max_reduction_table_v_2_2[abm_config[set][3]];
	ram_table->max_reduction[3][3] = max_reduction_table_v_2_2[abm_config[set][3]];
	ram_table->max_reduction[4][3] = max_reduction_table_v_2_2[abm_config[set][3]];

	ram_table->bright_pos_gain[0][0] = 0x20;
	ram_table->bright_pos_gain[0][1] = 0x20;
	ram_table->bright_pos_gain[0][2] = 0x20;
	ram_table->bright_pos_gain[0][3] = 0x20;
	ram_table->bright_pos_gain[1][0] = 0x20;
	ram_table->bright_pos_gain[1][1] = 0x20;
	ram_table->bright_pos_gain[1][2] = 0x20;
	ram_table->bright_pos_gain[1][3] = 0x20;
	ram_table->bright_pos_gain[2][0] = 0x20;
	ram_table->bright_pos_gain[2][1] = 0x20;
	ram_table->bright_pos_gain[2][2] = 0x20;
	ram_table->bright_pos_gain[2][3] = 0x20;
	ram_table->bright_pos_gain[3][0] = 0x20;
	ram_table->bright_pos_gain[3][1] = 0x20;
	ram_table->bright_pos_gain[3][2] = 0x20;
	ram_table->bright_pos_gain[3][3] = 0x20;
	ram_table->bright_pos_gain[4][0] = 0x20;
	ram_table->bright_pos_gain[4][1] = 0x20;
	ram_table->bright_pos_gain[4][2] = 0x20;
	ram_table->bright_pos_gain[4][3] = 0x20;

	ram_table->dark_pos_gain[0][0] = 0x00;
	ram_table->dark_pos_gain[0][1] = 0x00;
	ram_table->dark_pos_gain[0][2] = 0x00;
	ram_table->dark_pos_gain[0][3] = 0x00;
	ram_table->dark_pos_gain[1][0] = 0x00;
	ram_table->dark_pos_gain[1][1] = 0x00;
	ram_table->dark_pos_gain[1][2] = 0x00;
	ram_table->dark_pos_gain[1][3] = 0x00;
	ram_table->dark_pos_gain[2][0] = 0x00;
	ram_table->dark_pos_gain[2][1] = 0x00;
	ram_table->dark_pos_gain[2][2] = 0x00;
	ram_table->dark_pos_gain[2][3] = 0x00;
	ram_table->dark_pos_gain[3][0] = 0x00;
	ram_table->dark_pos_gain[3][1] = 0x00;
	ram_table->dark_pos_gain[3][2] = 0x00;
	ram_table->dark_pos_gain[3][3] = 0x00;
	ram_table->dark_pos_gain[4][0] = 0x00;
	ram_table->dark_pos_gain[4][1] = 0x00;
	ram_table->dark_pos_gain[4][2] = 0x00;
	ram_table->dark_pos_gain[4][3] = 0x00;

	ram_table->hybrid_factor[0] = 0xff;
	ram_table->hybrid_factor[1] = 0xff;
	ram_table->hybrid_factor[2] = 0xff;
	ram_table->hybrid_factor[3] = 0xc0;

	ram_table->contrast_factor[0] = 0x99;
	ram_table->contrast_factor[1] = 0x99;
	ram_table->contrast_factor[2] = 0x90;
	ram_table->contrast_factor[3] = 0x80;

	ram_table->iir_curve[0] = 0x65;
	ram_table->iir_curve[1] = 0x65;
	ram_table->iir_curve[2] = 0x65;
	ram_table->iir_curve[3] = 0x65;
	ram_table->iir_curve[4] = 0x65;

	//Gamma 2.2
	ram_table->crgb_thresh[0] = cpu_to_be16(0x127c);
	ram_table->crgb_thresh[1] = cpu_to_be16(0x151b);
	ram_table->crgb_thresh[2] = cpu_to_be16(0x17d5);
	ram_table->crgb_thresh[3] = cpu_to_be16(0x1a56);
	ram_table->crgb_thresh[4] = cpu_to_be16(0x1c83);
	ram_table->crgb_thresh[5] = cpu_to_be16(0x1e72);
	ram_table->crgb_thresh[6] = cpu_to_be16(0x20f0);
	ram_table->crgb_thresh[7] = cpu_to_be16(0x232b);
	ram_table->crgb_offset[0] = cpu_to_be16(0x2999);
	ram_table->crgb_offset[1] = cpu_to_be16(0x3999);
	ram_table->crgb_offset[2] = cpu_to_be16(0x4666);
	ram_table->crgb_offset[3] = cpu_to_be16(0x5999);
	ram_table->crgb_offset[4] = cpu_to_be16(0x6333);
	ram_table->crgb_offset[5] = cpu_to_be16(0x7800);
	ram_table->crgb_offset[6] = cpu_to_be16(0x8c00);
	ram_table->crgb_offset[7] = cpu_to_be16(0xa000);
	ram_table->crgb_slope[0]  = cpu_to_be16(0x3609);
	ram_table->crgb_slope[1]  = cpu_to_be16(0x2dfa);
	ram_table->crgb_slope[2]  = cpu_to_be16(0x27ea);
	ram_table->crgb_slope[3]  = cpu_to_be16(0x235d);
	ram_table->crgb_slope[4]  = cpu_to_be16(0x2042);
	ram_table->crgb_slope[5]  = cpu_to_be16(0x1dc3);
	ram_table->crgb_slope[6]  = cpu_to_be16(0x1b1a);
	ram_table->crgb_slope[7]  = cpu_to_be16(0x1910);

	fill_backlight_transform_table_v_2_2(
			params, ram_table, true);
}

static void fill_iram_v_2_3(struct iram_table_v_2_2 *ram_table, struct dmcu_iram_parameters params, bool big_endian)
{
	unsigned int i, j;
	unsigned int set = params.set;

	ram_table->flags = 0x0;
	ram_table->min_abm_backlight = (uint16_t)((big_endian) ?
		cpu_to_be16(params.min_abm_backlight) :
		cpu_to_le16(params.min_abm_backlight));

	for (i = 0; i < NUM_AGGR_LEVEL; i++) {
		ram_table->hybrid_factor[i] = (uint8_t)abm_settings[set][i].brightness_gain;
		ram_table->contrast_factor[i] = abm_settings[set][i].contrast_factor;
		ram_table->deviation_gain[i] = abm_settings[set][i].deviation_gain;
		ram_table->min_knee[i] = abm_settings[set][i].min_knee;
		ram_table->max_knee[i] = abm_settings[set][i].max_knee;

		for (j = 0; j < NUM_AMBI_LEVEL; j++) {
			ram_table->min_reduction[j][i] = abm_settings[set][i].min_reduction;
			ram_table->max_reduction[j][i] = abm_settings[set][i].max_reduction;
			ram_table->bright_pos_gain[j][i] = abm_settings[set][i].bright_pos_gain;
			ram_table->dark_pos_gain[j][i] = abm_settings[set][i].dark_pos_gain;
		}
	}

	ram_table->iir_curve[0] = 0x65;
	ram_table->iir_curve[1] = 0x65;
	ram_table->iir_curve[2] = 0x65;
	ram_table->iir_curve[3] = 0x65;
	ram_table->iir_curve[4] = 0x65;

	//Gamma 2.2
	ram_table->crgb_thresh[0] = bswap16_based_on_endian(big_endian, 0x127c);
	ram_table->crgb_thresh[1] = bswap16_based_on_endian(big_endian, 0x151b);
	ram_table->crgb_thresh[2] = bswap16_based_on_endian(big_endian, 0x17d5);
	ram_table->crgb_thresh[3] = bswap16_based_on_endian(big_endian, 0x1a56);
	ram_table->crgb_thresh[4] = bswap16_based_on_endian(big_endian, 0x1c83);
	ram_table->crgb_thresh[5] = bswap16_based_on_endian(big_endian, 0x1e72);
	ram_table->crgb_thresh[6] = bswap16_based_on_endian(big_endian, 0x20f0);
	ram_table->crgb_thresh[7] = bswap16_based_on_endian(big_endian, 0x232b);
	ram_table->crgb_offset[0] = bswap16_based_on_endian(big_endian, 0x2999);
	ram_table->crgb_offset[1] = bswap16_based_on_endian(big_endian, 0x3999);
	ram_table->crgb_offset[2] = bswap16_based_on_endian(big_endian, 0x4666);
	ram_table->crgb_offset[3] = bswap16_based_on_endian(big_endian, 0x5999);
	ram_table->crgb_offset[4] = bswap16_based_on_endian(big_endian, 0x6333);
	ram_table->crgb_offset[5] = bswap16_based_on_endian(big_endian, 0x7800);
	ram_table->crgb_offset[6] = bswap16_based_on_endian(big_endian, 0x8c00);
	ram_table->crgb_offset[7] = bswap16_based_on_endian(big_endian, 0xa000);
	ram_table->crgb_slope[0]  = bswap16_based_on_endian(big_endian, 0x3609);
	ram_table->crgb_slope[1]  = bswap16_based_on_endian(big_endian, 0x2dfa);
	ram_table->crgb_slope[2]  = bswap16_based_on_endian(big_endian, 0x27ea);
	ram_table->crgb_slope[3]  = bswap16_based_on_endian(big_endian, 0x235d);
	ram_table->crgb_slope[4]  = bswap16_based_on_endian(big_endian, 0x2042);
	ram_table->crgb_slope[5]  = bswap16_based_on_endian(big_endian, 0x1dc3);
	ram_table->crgb_slope[6]  = bswap16_based_on_endian(big_endian, 0x1b1a);
	ram_table->crgb_slope[7]  = bswap16_based_on_endian(big_endian, 0x1910);

	fill_backlight_transform_table_v_2_2(
			params, ram_table, big_endian);
}

bool dmub_init_abm_config(struct resource_pool *res_pool,
	struct dmcu_iram_parameters params,
	unsigned int inst)
{
	struct iram_table_v_2_2 ram_table;
	struct abm_config_table config;
	unsigned int set = params.set;
	bool result = false;
	uint32_t i, j = 0;

	if (res_pool->abm == NULL && res_pool->multiple_abms[inst] == NULL)
		return false;

	memset(&ram_table, 0, sizeof(ram_table));
	memset(&config, 0, sizeof(config));

	fill_iram_v_2_3(&ram_table, params, false);

	// We must copy to structure that is aligned to 32-bit
	for (i = 0; i < NUM_POWER_FN_SEGS; i++) {
		config.crgb_thresh[i] = ram_table.crgb_thresh[i];
		config.crgb_offset[i] = ram_table.crgb_offset[i];
		config.crgb_slope[i] = ram_table.crgb_slope[i];
	}

	for (i = 0; i < NUM_BL_CURVE_SEGS; i++) {
		config.backlight_thresholds[i] = ram_table.backlight_thresholds[i];
		config.backlight_offsets[i] = ram_table.backlight_offsets[i];
	}

	for (i = 0; i < NUM_AMBI_LEVEL; i++)
		config.iir_curve[i] = ram_table.iir_curve[i];

	for (i = 0; i < NUM_AMBI_LEVEL; i++) {
		for (j = 0; j < NUM_AGGR_LEVEL; j++) {
			config.min_reduction[i][j] = ram_table.min_reduction[i][j];
			config.max_reduction[i][j] = ram_table.max_reduction[i][j];
			config.bright_pos_gain[i][j] = ram_table.bright_pos_gain[i][j];
			config.dark_pos_gain[i][j] = ram_table.dark_pos_gain[i][j];
		}
	}

	for (i = 0; i < NUM_AGGR_LEVEL; i++) {
		config.hybrid_factor[i] = ram_table.hybrid_factor[i];
		config.contrast_factor[i] = ram_table.contrast_factor[i];
		config.deviation_gain[i] = ram_table.deviation_gain[i];
		config.min_knee[i] = ram_table.min_knee[i];
		config.max_knee[i] = ram_table.max_knee[i];
	}

	if (params.backlight_ramping_override) {

		ASSERT(params.backlight_ramping_reduction <= 0xFFFF);
		ASSERT(params.backlight_ramping_start <= 0xFFFF);
		for (i = 0; i < NUM_AGGR_LEVEL; i++) {
			config.blRampReduction[i] = (uint16_t)params.backlight_ramping_reduction;
			config.blRampStart[i]     = (uint16_t)params.backlight_ramping_start;
		}
	} else {
		for (i = 0; i < NUM_AGGR_LEVEL; i++) {
			config.blRampReduction[i] = abm_settings[set][i].blRampReduction;
			config.blRampStart[i] = abm_settings[set][i].blRampStart;
		}
	}

	config.min_abm_backlight = ram_table.min_abm_backlight;

	if (res_pool->multiple_abms[inst]) {
		result = res_pool->multiple_abms[inst]->funcs->init_abm_config(
			res_pool->multiple_abms[inst], (char *)(&config), sizeof(struct abm_config_table), inst);
	} else
		result = res_pool->abm->funcs->init_abm_config(
			res_pool->abm, (char *)(&config), sizeof(struct abm_config_table), 0);

	return result;
}

bool dmcu_load_iram(struct dmcu *dmcu,
	struct dmcu_iram_parameters params)
{
	unsigned char ram_table[IRAM_SIZE];
	bool result = false;

	if (dmcu == NULL)
		return false;

	if (dmcu && !dmcu->funcs->is_dmcu_initialized(dmcu))
		return true;

	memset(&ram_table, 0, sizeof(ram_table));

	if (dmcu->dmcu_version.abm_version == 0x24) {
		fill_iram_v_2_3((struct iram_table_v_2_2 *)ram_table, params, true);
		result = dmcu->funcs->load_iram(dmcu, 0, (char *)(&ram_table),
						IRAM_RESERVE_AREA_START_V2_2);
	} else if (dmcu->dmcu_version.abm_version == 0x23) {
		fill_iram_v_2_3((struct iram_table_v_2_2 *)ram_table, params, true);

		result = dmcu->funcs->load_iram(
				dmcu, 0, (char *)(&ram_table), IRAM_RESERVE_AREA_START_V2_2);
	} else if (dmcu->dmcu_version.abm_version == 0x22) {
		fill_iram_v_2_2((struct iram_table_v_2_2 *)ram_table, params);

		result = dmcu->funcs->load_iram(
				dmcu, 0, (char *)(&ram_table), IRAM_RESERVE_AREA_START_V2_2);
	} else {
		fill_iram_v_2((struct iram_table_v_2 *)ram_table, params);

		result = dmcu->funcs->load_iram(
				dmcu, 0, (char *)(&ram_table), IRAM_RESERVE_AREA_START_V2);

		if (result)
			result = dmcu->funcs->load_iram(
					dmcu, IRAM_RESERVE_AREA_END_V2 + 1,
					(char *)(&ram_table) + IRAM_RESERVE_AREA_END_V2 + 1,
					sizeof(ram_table) - IRAM_RESERVE_AREA_END_V2 - 1);
	}

	return result;
}

bool fill_custom_backlight_caps(unsigned int config_no, struct dm_acpi_atif_backlight_caps *caps)
{
	unsigned int data_points_size;
	uint64_t caps_size;

	if (config_no >= ARRAY_SIZE(custom_backlight_profiles))
		return false;

	data_points_size = custom_backlight_profiles[config_no].num_data_points
			* sizeof(custom_backlight_profiles[config_no].data_points[0]);

	caps_size = sizeof(struct dm_acpi_atif_backlight_caps) - sizeof(caps->data_points) + data_points_size;
	ASSERT(caps_size <= 0xFFFF);
	caps->size = (uint16_t)caps_size;
	caps->flags = 0;
	caps->error_code = 0;
	caps->ac_level_percentage = custom_backlight_profiles[config_no].ac_level_percentage;
	caps->dc_level_percentage = custom_backlight_profiles[config_no].dc_level_percentage;
	caps->min_input_signal = custom_backlight_profiles[config_no].min_input_signal;
	caps->max_input_signal = custom_backlight_profiles[config_no].max_input_signal;
	caps->num_data_points = (uint8_t)custom_backlight_profiles[config_no].num_data_points;
	memcpy(caps->data_points, custom_backlight_profiles[config_no].data_points, data_points_size);
	return true;
}