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Filename : pisp_be_config.h
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/* SPDX-License-Identifier: GPL-2.0-only WITH Linux-syscall-note */
/*
 * PiSP Back End configuration definitions.
 *
 * Copyright (C) 2021 - Raspberry Pi Ltd
 *
 */
#ifndef _PISP_BE_CONFIG_H_
#define _PISP_BE_CONFIG_H_

#include <linux/types.h>

#include "pisp_common.h"

/* byte alignment for inputs */
#define PISP_BACK_END_INPUT_ALIGN 4u
/* alignment for compressed inputs */
#define PISP_BACK_END_COMPRESSED_ALIGN 8u
/* minimum required byte alignment for outputs */
#define PISP_BACK_END_OUTPUT_MIN_ALIGN 16u
/* preferred byte alignment for outputs */
#define PISP_BACK_END_OUTPUT_MAX_ALIGN 64u

/* minimum allowed tile width anywhere in the pipeline */
#define PISP_BACK_END_MIN_TILE_WIDTH 16u
/* minimum allowed tile width anywhere in the pipeline */
#define PISP_BACK_END_MIN_TILE_HEIGHT 16u

#define PISP_BACK_END_NUM_OUTPUTS 2
#define PISP_BACK_END_HOG_OUTPUT 1

#define PISP_BACK_END_NUM_TILES 64

enum pisp_be_bayer_enable {
	PISP_BE_BAYER_ENABLE_INPUT = 0x000001,
	PISP_BE_BAYER_ENABLE_DECOMPRESS = 0x000002,
	PISP_BE_BAYER_ENABLE_DPC = 0x000004,
	PISP_BE_BAYER_ENABLE_GEQ = 0x000008,
	PISP_BE_BAYER_ENABLE_TDN_INPUT = 0x000010,
	PISP_BE_BAYER_ENABLE_TDN_DECOMPRESS = 0x000020,
	PISP_BE_BAYER_ENABLE_TDN = 0x000040,
	PISP_BE_BAYER_ENABLE_TDN_COMPRESS = 0x000080,
	PISP_BE_BAYER_ENABLE_TDN_OUTPUT = 0x000100,
	PISP_BE_BAYER_ENABLE_SDN = 0x000200,
	PISP_BE_BAYER_ENABLE_BLC = 0x000400,
	PISP_BE_BAYER_ENABLE_STITCH_INPUT = 0x000800,
	PISP_BE_BAYER_ENABLE_STITCH_DECOMPRESS = 0x001000,
	PISP_BE_BAYER_ENABLE_STITCH = 0x002000,
	PISP_BE_BAYER_ENABLE_STITCH_COMPRESS = 0x004000,
	PISP_BE_BAYER_ENABLE_STITCH_OUTPUT = 0x008000,
	PISP_BE_BAYER_ENABLE_WBG = 0x010000,
	PISP_BE_BAYER_ENABLE_CDN = 0x020000,
	PISP_BE_BAYER_ENABLE_LSC = 0x040000,
	PISP_BE_BAYER_ENABLE_TONEMAP = 0x080000,
	PISP_BE_BAYER_ENABLE_CAC = 0x100000,
	PISP_BE_BAYER_ENABLE_DEBIN = 0x200000,
	PISP_BE_BAYER_ENABLE_DEMOSAIC = 0x400000,
};

enum pisp_be_rgb_enable {
	PISP_BE_RGB_ENABLE_INPUT = 0x000001,
	PISP_BE_RGB_ENABLE_CCM = 0x000002,
	PISP_BE_RGB_ENABLE_SAT_CONTROL = 0x000004,
	PISP_BE_RGB_ENABLE_YCBCR = 0x000008,
	PISP_BE_RGB_ENABLE_FALSE_COLOUR = 0x000010,
	PISP_BE_RGB_ENABLE_SHARPEN = 0x000020,
	/* Preferred colours would occupy 0x000040 */
	PISP_BE_RGB_ENABLE_YCBCR_INVERSE = 0x000080,
	PISP_BE_RGB_ENABLE_GAMMA = 0x000100,
	PISP_BE_RGB_ENABLE_CSC0 = 0x000200,
	PISP_BE_RGB_ENABLE_CSC1 = 0x000400,
	PISP_BE_RGB_ENABLE_DOWNSCALE0 = 0x001000,
	PISP_BE_RGB_ENABLE_DOWNSCALE1 = 0x002000,
	PISP_BE_RGB_ENABLE_RESAMPLE0 = 0x008000,
	PISP_BE_RGB_ENABLE_RESAMPLE1 = 0x010000,
	PISP_BE_RGB_ENABLE_OUTPUT0 = 0x040000,
	PISP_BE_RGB_ENABLE_OUTPUT1 = 0x080000,
	PISP_BE_RGB_ENABLE_HOG = 0x200000
};

#define PISP_BE_RGB_ENABLE_CSC(i) (PISP_BE_RGB_ENABLE_CSC0 << (i))
#define PISP_BE_RGB_ENABLE_DOWNSCALE(i) (PISP_BE_RGB_ENABLE_DOWNSCALE0 << (i))
#define PISP_BE_RGB_ENABLE_RESAMPLE(i) (PISP_BE_RGB_ENABLE_RESAMPLE0 << (i))
#define PISP_BE_RGB_ENABLE_OUTPUT(i) (PISP_BE_RGB_ENABLE_OUTPUT0 << (i))

/*
 * We use the enable flags to show when blocks are "dirty", but we need some
 * extra ones too.
 */
enum pisp_be_dirty {
	PISP_BE_DIRTY_GLOBAL = 0x0001,
	PISP_BE_DIRTY_SH_FC_COMBINE = 0x0002,
	PISP_BE_DIRTY_CROP = 0x0004
};

/**
 * struct pisp_be_global_config - PiSP global enable bitmaps
 * @bayer_enables:	Bayer input enable flags
 * @rgb_enables:	RGB output enable flags
 * @bayer_order:	Bayer input format ordering
 * @pad:		Padding bytes
 */
struct pisp_be_global_config {
	__u32 bayer_enables;
	__u32 rgb_enables;
	__u8 bayer_order;
	__u8 pad[3];
} __attribute__((packed));

/**
 * struct pisp_be_input_buffer_config - PiSP Back End input buffer
 * @addr:		Input buffer address
 */
struct pisp_be_input_buffer_config {
	/* low 32 bits followed by high 32 bits (for each of up to 3 planes) */
	__u32 addr[3][2];
} __attribute__((packed));

/**
 * struct pisp_be_dpc_config - PiSP Back End DPC config
 *
 * Defective Pixel Correction configuration
 *
 * @coeff_level:	Coefficient for the darkest neighbouring pixel value
 * @coeff_range:	Coefficient for the range of pixels for this Bayer channel
 * @pad:		Padding byte
 * @flags:		DPC configuration flags
 */
struct pisp_be_dpc_config {
	__u8 coeff_level;
	__u8 coeff_range;
	__u8 pad;
#define PISP_BE_DPC_FLAG_FOLDBACK 1
	__u8 flags;
} __attribute__((packed));

/**
 * struct pisp_be_geq_config - PiSP Back End GEQ config
 *
 * Green Equalisation configuration
 *
 * @offset:		Offset value for threshold calculation
 * @slope_sharper:	Slope/Sharper configuration
 * @min:		Minimum value the threshold may have
 * @max:		Maximum value the threshold may have
 */
struct pisp_be_geq_config {
	__u16 offset;
#define PISP_BE_GEQ_SHARPER (1U << 15)
#define PISP_BE_GEQ_SLOPE ((1 << 10) - 1)
	/* top bit is the "sharper" flag, slope value is bottom 10 bits */
	__u16 slope_sharper;
	__u16 min;
	__u16 max;
} __attribute__((packed));

/**
 * struct pisp_be_tdn_input_buffer_config - PiSP Back End TDN input buffer
 * @addr:		TDN input buffer address
 */
struct pisp_be_tdn_input_buffer_config {
	/* low 32 bits followed by high 32 bits */
	__u32 addr[2];
} __attribute__((packed));

/**
 * struct pisp_be_tdn_config - PiSP Back End TDN config
 *
 * Temporal Denoise configuration
 *
 * @black_level:	Black level value subtracted from pixels
 * @ratio:		Multiplier for the LTA input frame
 * @noise_constant:	Constant offset value used in noise estimation
 * @noise_slope:	Noise estimation multiplier
 * @threshold:		Threshold for TDN operations
 * @reset:		Disable TDN operations
 * @pad:		Padding byte
 */
struct pisp_be_tdn_config {
	__u16 black_level;
	__u16 ratio;
	__u16 noise_constant;
	__u16 noise_slope;
	__u16 threshold;
	__u8 reset;
	__u8 pad;
} __attribute__((packed));

/**
 * struct pisp_be_tdn_output_buffer_config - PiSP Back End TDN output buffer
 * @addr:		TDN output buffer address
 */
struct pisp_be_tdn_output_buffer_config {
	/* low 32 bits followed by high 32 bits */
	__u32 addr[2];
} __attribute__((packed));

/**
 * struct pisp_be_sdn_config - PiSP Back End SDN config
 *
 * Spatial Denoise configuration
 *
 * @black_level:	Black level subtracted from pixel for noise estimation
 * @leakage:		Proportion of the original undenoised value to mix in
 *			denoised output
 * @pad:		Padding byte
 * @noise_constant:	Noise constant used for noise estimation
 * @noise_slope:	Noise slope value used for noise estimation
 * @noise_constant2:	Second noise constant used for noise estimation
 * @noise_slope2:	Second slope value used for noise estimation
 */
struct pisp_be_sdn_config {
	__u16 black_level;
	__u8 leakage;
	__u8 pad;
	__u16 noise_constant;
	__u16 noise_slope;
	__u16 noise_constant2;
	__u16 noise_slope2;
} __attribute__((packed));

/**
 * struct pisp_be_stitch_input_buffer_config - PiSP Back End Stitch input
 * @addr:		Stitch input buffer address
 */
struct pisp_be_stitch_input_buffer_config {
	/* low 32 bits followed by high 32 bits */
	__u32 addr[2];
} __attribute__((packed));

#define PISP_BE_STITCH_STREAMING_LONG 0x8000
#define PISP_BE_STITCH_EXPOSURE_RATIO_MASK 0x7fff

/**
 * struct pisp_be_stitch_config - PiSP Back End Stitch config
 *
 * Stitch block configuration
 *
 * @threshold_lo:		Low threshold value
 * @threshold_diff_power:	Low and high threshold difference
 * @pad:			Padding bytes
 * @exposure_ratio:		Multiplier to convert long exposure pixels into
 *				short exposure pixels
 * @motion_threshold_256:	Motion threshold above which short exposure
 *				pixels are used
 * @motion_threshold_recip:	Reciprocal of motion_threshold_256 value
 */
struct pisp_be_stitch_config {
	__u16 threshold_lo;
	__u8 threshold_diff_power;
	__u8 pad;

	/* top bit indicates whether streaming input is the long exposure */
	__u16 exposure_ratio;

	__u8 motion_threshold_256;
	__u8 motion_threshold_recip;
} __attribute__((packed));

/**
 * struct pisp_be_stitch_output_buffer_config - PiSP Back End Stitch output
 * @addr:		Stitch input buffer address
 */
struct pisp_be_stitch_output_buffer_config {
	/* low 32 bits followed by high 32 bits */
	__u32 addr[2];
} __attribute__((packed));

/**
 * struct pisp_be_cdn_config - PiSP Back End CDN config
 *
 * Colour Denoise configuration
 *
 * @thresh:		Constant for noise estimation
 * @iir_strength:	Relative strength of the IIR part of the filter
 * @g_adjust:		Proportion of the change assigned to the G channel
 */
struct pisp_be_cdn_config {
	__u16 thresh;
	__u8 iir_strength;
	__u8 g_adjust;
} __attribute__((packed));

#define PISP_BE_LSC_LOG_GRID_SIZE 5
#define PISP_BE_LSC_GRID_SIZE (1 << PISP_BE_LSC_LOG_GRID_SIZE)
#define PISP_BE_LSC_STEP_PRECISION 18

/**
 * struct pisp_be_lsc_config - PiSP Back End LSC config
 *
 * Lens Shading Correction configuration
 *
 * @grid_step_x:	Reciprocal of cell size width
 * @grid_step_y:	Reciprocal of cell size height
 * @lut_packed:		Jointly-coded RGB gains for each LSC grid
 */
struct pisp_be_lsc_config {
	/* (1<<18) / grid_cell_width */
	__u16 grid_step_x;
	/* (1<<18) / grid_cell_height */
	__u16 grid_step_y;
	/* RGB gains jointly encoded in 32 bits */
#define PISP_BE_LSC_LUT_SIZE	(PISP_BE_LSC_GRID_SIZE + 1)
	__u32 lut_packed[PISP_BE_LSC_LUT_SIZE][PISP_BE_LSC_LUT_SIZE];
} __attribute__((packed));

/**
 * struct pisp_be_lsc_extra - PiSP Back End LSC Extra config
 * @offset_x:		Horizontal offset into the LSC table of this tile
 * @offset_y:		Vertical offset into the LSC table of this tile
 */
struct pisp_be_lsc_extra {
	__u16 offset_x;
	__u16 offset_y;
} __attribute__((packed));

#define PISP_BE_CAC_LOG_GRID_SIZE 3
#define PISP_BE_CAC_GRID_SIZE (1 << PISP_BE_CAC_LOG_GRID_SIZE)
#define PISP_BE_CAC_STEP_PRECISION 20

/**
 * struct pisp_be_cac_config - PiSP Back End CAC config
 *
 * Chromatic Aberration Correction config
 *
 * @grid_step_x:	Reciprocal of cell size width
 * @grid_step_y:	Reciprocal of cell size height
 * @lut:		Pixel shift for the CAC grid
 */
struct pisp_be_cac_config {
	/* (1<<20) / grid_cell_width */
	__u16 grid_step_x;
	/* (1<<20) / grid_cell_height */
	__u16 grid_step_y;
	/* [gridy][gridx][rb][xy] */
#define PISP_BE_CAC_LUT_SIZE		(PISP_BE_CAC_GRID_SIZE + 1)
	__s8 lut[PISP_BE_CAC_LUT_SIZE][PISP_BE_CAC_LUT_SIZE][2][2];
} __attribute__((packed));

/**
 * struct pisp_be_cac_extra - PiSP Back End CAC extra config
 * @offset_x:		Horizontal offset into the CAC table of this tile
 * @offset_y:		Horizontal offset into the CAC table of this tile
 */
struct pisp_be_cac_extra {
	__u16 offset_x;
	__u16 offset_y;
} __attribute__((packed));

#define PISP_BE_DEBIN_NUM_COEFFS 4

/**
 * struct pisp_be_debin_config - PiSP Back End Debin config
 *
 * Debinning configuration
 *
 * @coeffs:		Filter coefficients for debinning
 * @h_enable:		Horizontal debinning enable
 * @v_enable:		Vertical debinning enable
 * @pad:		Padding bytes
 */
struct pisp_be_debin_config {
	__s8 coeffs[PISP_BE_DEBIN_NUM_COEFFS];
	__s8 h_enable;
	__s8 v_enable;
	__s8 pad[2];
} __attribute__((packed));

#define PISP_BE_TONEMAP_LUT_SIZE 64

/**
 * struct pisp_be_tonemap_config - PiSP Back End Tonemap config
 *
 * Tonemapping configuration
 *
 * @detail_constant:	Constant value for threshold calculation
 * @detail_slope:	Slope value for threshold calculation
 * @iir_strength:	Relative strength of the IIR fiter
 * @strength:		Strength factor
 * @lut:		Look-up table for tonemap curve
 */
struct pisp_be_tonemap_config {
	__u16 detail_constant;
	__u16 detail_slope;
	__u16 iir_strength;
	__u16 strength;
	__u32 lut[PISP_BE_TONEMAP_LUT_SIZE];
} __attribute__((packed));

/**
 * struct pisp_be_demosaic_config - PiSP Back End Demosaic config
 *
 * Demosaic configuration
 *
 * @sharper:		Use other Bayer channels to increase sharpness
 * @fc_mode:		Built-in false colour suppression mode
 * @pad:		Padding bytes
 */
struct pisp_be_demosaic_config {
	__u8 sharper;
	__u8 fc_mode;
	__u8 pad[2];
} __attribute__((packed));

/**
 * struct pisp_be_ccm_config - PiSP Back End CCM config
 *
 * Colour Correction Matrix configuration
 *
 * @coeffs:		Matrix coefficients
 * @pad:		Padding bytes
 * @offsets:		Offsets triplet
 */
struct pisp_be_ccm_config {
	__s16 coeffs[9];
	__u8 pad[2];
	__s32 offsets[3];
} __attribute__((packed));

/**
 * struct pisp_be_sat_control_config - PiSP Back End SAT config
 *
 * Saturation Control configuration
 *
 * @shift_r:		Left shift for Red colour channel
 * @shift_g:		Left shift for Green colour channel
 * @shift_b:		Left shift for Blue colour channel
 * @pad:		Padding byte
 */
struct pisp_be_sat_control_config {
	__u8 shift_r;
	__u8 shift_g;
	__u8 shift_b;
	__u8 pad;
} __attribute__((packed));

/**
 * struct pisp_be_false_colour_config - PiSP Back End False Colour config
 *
 * False Colour configuration
 *
 * @distance:		Distance of neighbouring pixels, either 1 or 2
 * @pad:		Padding bytes
 */
struct pisp_be_false_colour_config {
	__u8 distance;
	__u8 pad[3];
} __attribute__((packed));

#define PISP_BE_SHARPEN_SIZE 5
#define PISP_BE_SHARPEN_FUNC_NUM_POINTS 9

/**
 * struct pisp_be_sharpen_config - PiSP Back End Sharpening config
 *
 * Sharpening configuration
 *
 * @kernel0:		Coefficient for filter 0
 * @pad0:		Padding byte
 * @kernel1:		Coefficient for filter 1
 * @pad1:		Padding byte
 * @kernel2:		Coefficient for filter 2
 * @pad2:		Padding byte
 * @kernel3:		Coefficient for filter 3
 * @pad3:		Padding byte
 * @kernel4:		Coefficient for filter 4
 * @pad4:		Padding byte
 * @threshold_offset0:	Offset for filter 0 response calculation
 * @threshold_slope0:	Slope multiplier for the filter 0 response calculation
 * @scale0:		Scale factor for filter 0 response calculation
 * @pad5:		Padding byte
 * @threshold_offset1:	Offset for filter 0 response calculation
 * @threshold_slope1:	Slope multiplier for the filter 0 response calculation
 * @scale1:		Scale factor for filter 0 response calculation
 * @pad6:		Padding byte
 * @threshold_offset2:	Offset for filter 0 response calculation
 * @threshold_slope2:	Slope multiplier for the filter 0 response calculation
 * @scale2:		Scale factor for filter 0 response calculation
 * @pad7:		Padding byte
 * @threshold_offset3:	Offset for filter 0 response calculation
 * @threshold_slope3:	Slope multiplier for the filter 0 response calculation
 * @scale3:		Scale factor for filter 0 response calculation
 * @pad8:		Padding byte
 * @threshold_offset4:	Offset for filter 0 response calculation
 * @threshold_slope4:	Slope multiplier for the filter 0 response calculation
 * @scale4:		Scale factor for filter 0 response calculation
 * @pad9:		Padding byte
 * @positive_strength:	Factor to scale the positive sharpening strength
 * @positive_pre_limit:	Maximum allowed possible positive sharpening value
 * @positive_func:	Gain factor applied to positive sharpening response
 * @positive_limit:	Final gain factor applied to positive sharpening
 * @negative_strength:	Factor to scale the negative sharpening strength
 * @negative_pre_limit:	Maximum allowed possible negative sharpening value
 * @negative_func:	Gain factor applied to negative sharpening response
 * @negative_limit:	Final gain factor applied to negative sharpening
 * @enables:		Filter enable mask
 * @white:		White output pixel filter mask
 * @black:		Black output pixel filter mask
 * @grey:		Grey output pixel filter mask
 */
struct pisp_be_sharpen_config {
	__s8 kernel0[PISP_BE_SHARPEN_SIZE * PISP_BE_SHARPEN_SIZE];
	__s8 pad0[3];
	__s8 kernel1[PISP_BE_SHARPEN_SIZE * PISP_BE_SHARPEN_SIZE];
	__s8 pad1[3];
	__s8 kernel2[PISP_BE_SHARPEN_SIZE * PISP_BE_SHARPEN_SIZE];
	__s8 pad2[3];
	__s8 kernel3[PISP_BE_SHARPEN_SIZE * PISP_BE_SHARPEN_SIZE];
	__s8 pad3[3];
	__s8 kernel4[PISP_BE_SHARPEN_SIZE * PISP_BE_SHARPEN_SIZE];
	__s8 pad4[3];
	__u16 threshold_offset0;
	__u16 threshold_slope0;
	__u16 scale0;
	__u16 pad5;
	__u16 threshold_offset1;
	__u16 threshold_slope1;
	__u16 scale1;
	__u16 pad6;
	__u16 threshold_offset2;
	__u16 threshold_slope2;
	__u16 scale2;
	__u16 pad7;
	__u16 threshold_offset3;
	__u16 threshold_slope3;
	__u16 scale3;
	__u16 pad8;
	__u16 threshold_offset4;
	__u16 threshold_slope4;
	__u16 scale4;
	__u16 pad9;
	__u16 positive_strength;
	__u16 positive_pre_limit;
	__u16 positive_func[PISP_BE_SHARPEN_FUNC_NUM_POINTS];
	__u16 positive_limit;
	__u16 negative_strength;
	__u16 negative_pre_limit;
	__u16 negative_func[PISP_BE_SHARPEN_FUNC_NUM_POINTS];
	__u16 negative_limit;
	__u8 enables;
	__u8 white;
	__u8 black;
	__u8 grey;
} __attribute__((packed));

/**
 * struct pisp_be_sh_fc_combine_config - PiSP Back End Sharpening and
 *					 False Colour config
 *
 * Sharpening and False Colour configuration
 *
 * @y_factor:		Control amount of desaturation of pixels being darkened
 * @c1_factor:		Control amount of brightening of a pixel for the Cb
 *			channel
 * @c2_factor:		Control amount of brightening of a pixel for the Cr
 *			channel
 * @pad:		Padding byte
 */
struct pisp_be_sh_fc_combine_config {
	__u8 y_factor;
	__u8 c1_factor;
	__u8 c2_factor;
	__u8 pad;
} __attribute__((packed));

#define PISP_BE_GAMMA_LUT_SIZE 64

/**
 * struct pisp_be_gamma_config - PiSP Back End Gamma configuration
 * @lut:		Gamma curve look-up table
 */
struct pisp_be_gamma_config {
	__u32 lut[PISP_BE_GAMMA_LUT_SIZE];
} __attribute__((packed));

/**
 * struct pisp_be_crop_config - PiSP Back End Crop config
 *
 * Crop configuration
 *
 * @offset_x:		Number of pixels cropped from the left of the tile
 * @offset_y:		Number of pixels cropped from the top of the tile
 * @width:		Width of the cropped tile output
 * @height:		Height of the cropped tile output
 */
struct pisp_be_crop_config {
	__u16 offset_x, offset_y;
	__u16 width, height;
} __attribute__((packed));

#define PISP_BE_RESAMPLE_FILTER_SIZE 96

/**
 * struct pisp_be_resample_config - PiSP Back End Resampling config
 *
 * Resample configuration
 *
 * @scale_factor_h:	Horizontal scale factor
 * @scale_factor_v:	Vertical scale factor
 * @coef:		Resample coefficients
 */
struct pisp_be_resample_config {
	__u16 scale_factor_h, scale_factor_v;
	__s16 coef[PISP_BE_RESAMPLE_FILTER_SIZE];
} __attribute__((packed));

/**
 * struct pisp_be_resample_extra - PiSP Back End Resample config
 *
 * Resample configuration
 *
 * @scaled_width:	Width in pixels of the scaled output
 * @scaled_height:	Height in pixels of the scaled output
 * @initial_phase_h:	Initial horizontal phase
 * @initial_phase_v:	Initial vertical phase
 */
struct pisp_be_resample_extra {
	__u16 scaled_width;
	__u16 scaled_height;
	__s16 initial_phase_h[3];
	__s16 initial_phase_v[3];
} __attribute__((packed));

/**
 * struct pisp_be_downscale_config - PiSP Back End Downscale config
 *
 * Downscale configuration
 *
 * @scale_factor_h:	Horizontal scale factor
 * @scale_factor_v:	Vertical scale factor
 * @scale_recip_h:	Horizontal reciprocal factor
 * @scale_recip_v:	Vertical reciprocal factor
 */
struct pisp_be_downscale_config {
	__u16 scale_factor_h;
	__u16 scale_factor_v;
	__u16 scale_recip_h;
	__u16 scale_recip_v;
} __attribute__((packed));

/**
 * struct pisp_be_downscale_extra - PiSP Back End Downscale Extra config
 * @scaled_width:	Scaled image width
 * @scaled_height:	Scaled image height
 */
struct pisp_be_downscale_extra {
	__u16 scaled_width;
	__u16 scaled_height;
} __attribute__((packed));

/**
 * struct pisp_be_hog_config - PiSP Back End HOG config
 *
 * Histogram of Oriented Gradients configuration
 *
 * @compute_signed:	Set 0 for unsigned gradients, 1 for signed
 * @channel_mix:	Channels proportions to use
 * @stride:		Stride in bytes between blocks directly below
 */
struct pisp_be_hog_config {
	__u8 compute_signed;
	__u8 channel_mix[3];
	__u32 stride;
} __attribute__((packed));

struct pisp_be_axi_config {
	__u8 r_qos; /* Read QoS */
	__u8 r_cache_prot; /* Read { prot[2:0], cache[3:0] } */
	__u8 w_qos; /* Write QoS */
	__u8 w_cache_prot; /* Write { prot[2:0], cache[3:0] } */
} __attribute__((packed));

/**
 * enum pisp_be_transform - PiSP Back End Transform flags
 * @PISP_BE_TRANSFORM_NONE:	No transform
 * @PISP_BE_TRANSFORM_HFLIP:	Horizontal flip
 * @PISP_BE_TRANSFORM_VFLIP:	Vertical flip
 * @PISP_BE_TRANSFORM_ROT180:	180 degress rotation
 */
enum pisp_be_transform {
	PISP_BE_TRANSFORM_NONE = 0x0,
	PISP_BE_TRANSFORM_HFLIP = 0x1,
	PISP_BE_TRANSFORM_VFLIP = 0x2,
	PISP_BE_TRANSFORM_ROT180 =
		(PISP_BE_TRANSFORM_HFLIP | PISP_BE_TRANSFORM_VFLIP)
};

struct pisp_be_output_format_config {
	struct pisp_image_format_config image;
	__u8 transform;
	__u8 pad[3];
	__u16 lo;
	__u16 hi;
	__u16 lo2;
	__u16 hi2;
} __attribute__((packed));

/**
 * struct pisp_be_output_buffer_config - PiSP Back End Output buffer
 * @addr:		Output buffer address
 */
struct pisp_be_output_buffer_config {
	/* low 32 bits followed by high 32 bits (for each of 3 planes) */
	__u32 addr[3][2];
} __attribute__((packed));

/**
 * struct pisp_be_hog_buffer_config - PiSP Back End HOG buffer
 * @addr:		HOG buffer address
 */
struct pisp_be_hog_buffer_config {
	/* low 32 bits followed by high 32 bits */
	__u32 addr[2];
} __attribute__((packed));

/**
 * struct pisp_be_config - RaspberryPi PiSP Back End Processing configuration
 *
 * @input_buffer:		Input buffer addresses
 * @tdn_input_buffer:		TDN input buffer addresses
 * @stitch_input_buffer:	Stitch input buffer addresses
 * @tdn_output_buffer:		TDN output buffer addresses
 * @stitch_output_buffer:	Stitch output buffer addresses
 * @output_buffer:		Output buffers addresses
 * @hog_buffer:			HOG buffer addresses
 * @global:			Global PiSP configuration
 * @input_format:		Input image format
 * @decompress:			Decompress configuration
 * @dpc:			Defective Pixel Correction configuration
 * @geq:			Green Equalisation configuration
 * @tdn_input_format:		Temporal Denoise input format
 * @tdn_decompress:		Temporal Denoise decompress configuration
 * @tdn:			Temporal Denoise configuration
 * @tdn_compress:		Temporal Denoise compress configuration
 * @tdn_output_format:		Temporal Denoise output format
 * @sdn:			Spatial Denoise configuration
 * @blc:			Black Level Correction configuration
 * @stitch_compress:		Stitch compress configuration
 * @stitch_output_format:	Stitch output format
 * @stitch_input_format:	Stitch input format
 * @stitch_decompress:		Stitch decompress configuration
 * @stitch:			Stitch configuration
 * @lsc:			Lens Shading Correction configuration
 * @wbg:			White Balance Gain configuration
 * @cdn:			Colour Denoise configuration
 * @cac:			Colour Aberration Correction configuration
 * @debin:			Debinning configuration
 * @tonemap:			Tonemapping configuration
 * @demosaic:			Demosaicing configuration
 * @ccm:			Colour Correction Matrix configuration
 * @sat_control:		Saturation Control configuration
 * @ycbcr:			YCbCr colour correction configuration
 * @sharpen:			Sharpening configuration
 * @false_colour:		False colour correction
 * @sh_fc_combine:		Sharpening and False Colour correction
 * @ycbcr_inverse:		Inverse YCbCr colour correction
 * @gamma:			Gamma curve configuration
 * @csc:			Color Space Conversion configuration
 * @downscale:			Downscale configuration
 * @resample:			Resampling configuration
 * @output_format:		Output format configuration
 * @hog:			HOG configuration
 * @axi:			AXI bus configuration
 * @lsc_extra:			LSC extra info
 * @cac_extra:			CAC extra info
 * @downscale_extra:		Downscaler extra info
 * @resample_extra:		Resample extra info
 * @crop:			Crop configuration
 * @hog_format:			HOG format info
 * @dirty_flags_bayer:		Bayer enable dirty flags
 *				(:c:type:`pisp_be_bayer_enable`)
 * @dirty_flags_rgb:		RGB enable dirty flags
 *				(:c:type:`pisp_be_rgb_enable`)
 * @dirty_flags_extra:		Extra dirty flags
 */
struct pisp_be_config {
	/* I/O configuration: */
	struct pisp_be_input_buffer_config input_buffer;
	struct pisp_be_tdn_input_buffer_config tdn_input_buffer;
	struct pisp_be_stitch_input_buffer_config stitch_input_buffer;
	struct pisp_be_tdn_output_buffer_config tdn_output_buffer;
	struct pisp_be_stitch_output_buffer_config stitch_output_buffer;
	struct pisp_be_output_buffer_config
				output_buffer[PISP_BACK_END_NUM_OUTPUTS];
	struct pisp_be_hog_buffer_config hog_buffer;
	/* Processing configuration: */
	struct pisp_be_global_config global;
	struct pisp_image_format_config input_format;
	struct pisp_decompress_config decompress;
	struct pisp_be_dpc_config dpc;
	struct pisp_be_geq_config geq;
	struct pisp_image_format_config tdn_input_format;
	struct pisp_decompress_config tdn_decompress;
	struct pisp_be_tdn_config tdn;
	struct pisp_compress_config tdn_compress;
	struct pisp_image_format_config tdn_output_format;
	struct pisp_be_sdn_config sdn;
	struct pisp_bla_config blc;
	struct pisp_compress_config stitch_compress;
	struct pisp_image_format_config stitch_output_format;
	struct pisp_image_format_config stitch_input_format;
	struct pisp_decompress_config stitch_decompress;
	struct pisp_be_stitch_config stitch;
	struct pisp_be_lsc_config lsc;
	struct pisp_wbg_config wbg;
	struct pisp_be_cdn_config cdn;
	struct pisp_be_cac_config cac;
	struct pisp_be_debin_config debin;
	struct pisp_be_tonemap_config tonemap;
	struct pisp_be_demosaic_config demosaic;
	struct pisp_be_ccm_config ccm;
	struct pisp_be_sat_control_config sat_control;
	struct pisp_be_ccm_config ycbcr;
	struct pisp_be_sharpen_config sharpen;
	struct pisp_be_false_colour_config false_colour;
	struct pisp_be_sh_fc_combine_config sh_fc_combine;
	struct pisp_be_ccm_config ycbcr_inverse;
	struct pisp_be_gamma_config gamma;
	struct pisp_be_ccm_config csc[PISP_BACK_END_NUM_OUTPUTS];
	struct pisp_be_downscale_config downscale[PISP_BACK_END_NUM_OUTPUTS];
	struct pisp_be_resample_config resample[PISP_BACK_END_NUM_OUTPUTS];
	struct pisp_be_output_format_config
				output_format[PISP_BACK_END_NUM_OUTPUTS];
	struct pisp_be_hog_config hog;
	struct pisp_be_axi_config axi;
	/* Non-register fields: */
	struct pisp_be_lsc_extra lsc_extra;
	struct pisp_be_cac_extra cac_extra;
	struct pisp_be_downscale_extra
				downscale_extra[PISP_BACK_END_NUM_OUTPUTS];
	struct pisp_be_resample_extra resample_extra[PISP_BACK_END_NUM_OUTPUTS];
	struct pisp_be_crop_config crop;
	struct pisp_image_format_config hog_format;
	__u32 dirty_flags_bayer; /* these use pisp_be_bayer_enable */
	__u32 dirty_flags_rgb; /* use pisp_be_rgb_enable */
	__u32 dirty_flags_extra; /* these use pisp_be_dirty_t */
} __attribute__((packed));

/**
 * enum pisp_tile_edge - PiSP Back End Tile position
 * @PISP_LEFT_EDGE:		Left edge tile
 * @PISP_RIGHT_EDGE:		Right edge tile
 * @PISP_TOP_EDGE:		Top edge tile
 * @PISP_BOTTOM_EDGE:		Bottom edge tile
 */
enum pisp_tile_edge {
	PISP_LEFT_EDGE = (1 << 0),
	PISP_RIGHT_EDGE = (1 << 1),
	PISP_TOP_EDGE = (1 << 2),
	PISP_BOTTOM_EDGE = (1 << 3)
};

/**
 * struct pisp_tile - Raspberry Pi PiSP Back End tile configuration
 *
 * Tile parameters: each set of tile parameters is a 160-bytes block of data
 * which contains the tile processing parameters.
 *
 * @edge:			Edge tile flag
 * @pad0:			Padding bytes
 * @input_addr_offset:		Top-left pixel offset, in bytes
 * @input_addr_offset2:		Top-left pixel offset, in bytes for the second/
 *				third image planes
 * @input_offset_x:		Horizontal offset in pixels of this tile in the
 *				input image
 * @input_offset_y:		Vertical offset in pixels of this tile in the
 *				input image
 * @input_width:		Width in pixels of this tile
 * @input_height:		Height in pixels of the this tile
 * @tdn_input_addr_offset:	TDN input image offset, in bytes
 * @tdn_output_addr_offset:	TDN output image offset, in bytes
 * @stitch_input_addr_offset:	Stitch input image offset, in bytes
 * @stitch_output_addr_offset:	Stitch output image offset, in bytes
 * @lsc_grid_offset_x:		Horizontal offset in the LSC table for this tile
 * @lsc_grid_offset_y:		Vertical offset in the LSC table for this tile
 * @cac_grid_offset_x:		Horizontal offset in the CAC table for this tile
 * @cac_grid_offset_y:		Horizontal offset in the CAC table for this tile
 * @crop_x_start:		Number of pixels cropped from the left of the
 *				tile
 * @crop_x_end:			Number of pixels cropped from the right of the
 *				tile
 * @crop_y_start:		Number of pixels cropped from the top of the
 *				tile
 * @crop_y_end:			Number of pixels cropped from the bottom of the
 *				tile
 * @downscale_phase_x:		Initial horizontal phase in pixels
 * @downscale_phase_y:		Initial vertical phase in pixels
 * @resample_in_width:		Width in pixels of the tile entering the
 *				Resample block
 * @resample_in_height:		Height in pixels of the tile entering the
 *				Resample block
 * @resample_phase_x:		Initial horizontal phase for the Resample block
 * @resample_phase_y:		Initial vertical phase for the Resample block
 * @output_offset_x:		Horizontal offset in pixels where the tile will
 *				be written into the output image
 * @output_offset_y:		Vertical offset in pixels where the tile will be
 *				written into the output image
 * @output_width:		Width in pixels in the output image of this tile
 * @output_height:		Height in pixels in the output image of this tile
 * @output_addr_offset:		Offset in bytes into the output buffer
 * @output_addr_offset2:	Offset in bytes into the output buffer for the
 *				second and third plane
 * @output_hog_addr_offset:	Offset in bytes into the HOG buffer where
 *				results of this tile are to be written
 */
struct pisp_tile {
	__u8 edge; /* enum pisp_tile_edge */
	__u8 pad0[3];
	/* 4 bytes */
	__u32 input_addr_offset;
	__u32 input_addr_offset2;
	__u16 input_offset_x;
	__u16 input_offset_y;
	__u16 input_width;
	__u16 input_height;
	/* 20 bytes */
	__u32 tdn_input_addr_offset;
	__u32 tdn_output_addr_offset;
	__u32 stitch_input_addr_offset;
	__u32 stitch_output_addr_offset;
	/* 36 bytes */
	__u32 lsc_grid_offset_x;
	__u32 lsc_grid_offset_y;
	/* 44 bytes */
	__u32 cac_grid_offset_x;
	__u32 cac_grid_offset_y;
	/* 52 bytes */
	__u16 crop_x_start[PISP_BACK_END_NUM_OUTPUTS];
	__u16 crop_x_end[PISP_BACK_END_NUM_OUTPUTS];
	__u16 crop_y_start[PISP_BACK_END_NUM_OUTPUTS];
	__u16 crop_y_end[PISP_BACK_END_NUM_OUTPUTS];
	/* 68 bytes */
	/* Ordering is planes then branches */
	__u16 downscale_phase_x[3 * PISP_BACK_END_NUM_OUTPUTS];
	__u16 downscale_phase_y[3 * PISP_BACK_END_NUM_OUTPUTS];
	/* 92 bytes */
	__u16 resample_in_width[PISP_BACK_END_NUM_OUTPUTS];
	__u16 resample_in_height[PISP_BACK_END_NUM_OUTPUTS];
	/* 100 bytes */
	/* Ordering is planes then branches */
	__u16 resample_phase_x[3 * PISP_BACK_END_NUM_OUTPUTS];
	__u16 resample_phase_y[3 * PISP_BACK_END_NUM_OUTPUTS];
	/* 124 bytes */
	__u16 output_offset_x[PISP_BACK_END_NUM_OUTPUTS];
	__u16 output_offset_y[PISP_BACK_END_NUM_OUTPUTS];
	__u16 output_width[PISP_BACK_END_NUM_OUTPUTS];
	__u16 output_height[PISP_BACK_END_NUM_OUTPUTS];
	/* 140 bytes */
	__u32 output_addr_offset[PISP_BACK_END_NUM_OUTPUTS];
	__u32 output_addr_offset2[PISP_BACK_END_NUM_OUTPUTS];
	/* 156 bytes */
	__u32 output_hog_addr_offset;
	/* 160 bytes */
} __attribute__((packed));

/**
 * struct pisp_be_tiles_config - Raspberry Pi PiSP Back End configuration
 * @tiles:	Tile descriptors
 * @num_tiles:	Number of tiles
 * @config:	PiSP Back End configuration
 */
struct pisp_be_tiles_config {
	struct pisp_be_config config;
	struct pisp_tile tiles[PISP_BACK_END_NUM_TILES];
	__u32 num_tiles;
} __attribute__((packed));

#endif /* _PISP_BE_CONFIG_H_ */