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/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
/*
* ARM Mali-C55 ISP Driver - Userspace API
*
* Copyright (C) 2023 Ideas on Board Oy
*/
#ifndef __UAPI_MALI_C55_CONFIG_H
#define __UAPI_MALI_C55_CONFIG_H
#include <linux/types.h>
/*
* Frames are split into zones of almost equal width and height - a zone is a
* rectangular tile of a frame. The metering blocks within the ISP collect
* aggregated statistics per zone. A maximum of 15x15 zones can be configured,
* and so the statistics buffer within the hardware is sized to accommodate
* that.
*
* The utilised number of zones is runtime configurable.
*/
#define MALI_C55_MAX_ZONES (15 * 15)
/**
* struct mali_c55_ae_1024bin_hist - Auto Exposure 1024-bin histogram statistics
*
* @bins: 1024 element array of 16-bit pixel counts.
*
* The 1024-bin histogram module collects image-global but zone-weighted
* intensity distributions of pixels in fixed-width bins. The modules can be
* configured into different "plane modes" which affect the contents of the
* collected statistics. In plane mode 0, pixel intensities are taken regardless
* of colour plane into a single 1024-bin histogram with a bin width of 4. In
* plane mode 1, four 256-bin histograms with a bin width of 16 are collected -
* one for each CFA colour plane. In plane modes 4, 5, 6 and 7 two 512-bin
* histograms with a bin width of 8 are collected - in each mode one of the
* colour planes is collected into the first histogram and all the others are
* combined into the second. The histograms are stored consecutively in the bins
* array.
*
* The 16-bit pixel counts are stored as a 4-bit exponent in the most
* significant bits followed by a 12-bit mantissa. Conversion to a usable
* format can be done according to the following pseudo-code::
*
* if (e == 0) {
* bin = m * 2;
* } else {
* bin = (m + 4096) * 2^e
* }
*
* where
* e is the exponent value in range 0..15
* m is the mantissa value in range 0..4095
*
* The pixels used in calculating the statistics can be masked using three
* methods:
*
* 1. Pixels can be skipped in X and Y directions independently.
* 2. Minimum/Maximum intensities can be configured
* 3. Zones can be differentially weighted, including 0 weighted to mask them
*
* The data for this histogram can be collected from different tap points in the
* ISP depending on configuration - after the white balance or digital gain
* blocks, or immediately after the input crossbar.
*/
struct mali_c55_ae_1024bin_hist {
__u16 bins[1024];
} __attribute__((packed));
/**
* struct mali_c55_ae_5bin_hist - Auto Exposure 5-bin histogram statistics
*
* @hist0: 16-bit normalised pixel count for the 0th intensity bin
* @hist1: 16-bit normalised pixel count for the 1st intensity bin
* @hist3: 16-bit normalised pixel count for the 3rd intensity bin
* @hist4: 16-bit normalised pixel count for the 4th intensity bin
*
* The ISP generates a 5-bin histogram of normalised pixel counts within bins of
* pixel intensity for each of 225 possible zones within a frame. The centre bin
* of the histogram for each zone is not available from the hardware and must be
* calculated by subtracting the values of hist0, hist1, hist3 and hist4 from
* 0xffff as in the following equation:
*
* hist2 = 0xffff - (hist0 + hist1 + hist3 + hist4)
*/
struct mali_c55_ae_5bin_hist {
__u16 hist0;
__u16 hist1;
__u16 hist3;
__u16 hist4;
} __attribute__((packed));
/**
* struct mali_c55_awb_average_ratios - Auto White Balance colour ratios
*
* @avg_rg_gr: Average R/G or G/R ratio in Q4.8 format.
* @avg_bg_br: Average B/G or B/R ratio in Q4.8 format.
* @num_pixels: The number of pixels used in the AWB calculation
*
* The ISP calculates and collects average colour ratios for each zone in an
* image and stores them in Q4.8 format (the lowest 8 bits are fractional, with
* bits [11:8] representing the integer). The exact ratios collected (either
* R/G, B/G or G/R, B/R) are configurable through the parameters buffer. The
* value of the 4 high bits is undefined.
*/
struct mali_c55_awb_average_ratios {
__u16 avg_rg_gr;
__u16 avg_bg_br;
__u32 num_pixels;
} __attribute__((packed));
/**
* struct mali_c55_af_statistics - Auto Focus edge and intensity statistics
*
* @intensity_stats: Packed mantissa and exponent value for pixel intensity
* @edge_stats: Packed mantissa and exponent values for edge intensity
*
* The ISP collects the squared sum of pixel intensities for each zone within a
* configurable Region of Interest on the frame. Additionally, the same data are
* collected after being passed through a bandpass filter which removes high and
* low frequency components - these are referred to as the edge statistics.
*
* The intensity and edge statistics for a zone can be used to calculate the
* contrast information for a zone
*
* C = E2 / I2
*
* Where I2 is the intensity statistic for a zone and E2 is the edge statistic
* for that zone. Optimum focus is reached when C is at its maximum.
*
* The intensity and edge statistics are stored packed into a non-standard 16
* bit floating point format, where the 7 most significant bits represent the
* exponent and the 9 least significant bits the mantissa. This format can be
* unpacked with the following pseudocode::
*
* if (e == 0) {
* x = m;
* } else {
* x = 2^e-1 * (m + 2^9)
* }
*
* where
* e is the exponent value in range 0..127
* m is the mantissa value in range 0..511
*/
struct mali_c55_af_statistics {
__u16 intensity_stats;
__u16 edge_stats;
} __attribute__((packed));
/**
* struct mali_c55_stats_buffer - 3A statistics for the mali-c55 ISP
*
* @ae_1024bin_hist: 1024-bin frame-global pixel intensity histogram
* @iridix_1024bin_hist: Post-Iridix block 1024-bin histogram
* @ae_5bin_hists: 5-bin pixel intensity histograms for AEC
* @reserved1: Undefined buffer space
* @awb_ratios: Color balance ratios for Auto White Balance
* @reserved2: Undefined buffer space
* @af_statistics: Pixel intensity statistics for Auto Focus
* @reserved3: Undefined buffer space
*
* This struct describes the metering statistics space in the Mali-C55 ISP's
* hardware in its entirety. The space between each defined area is marked as
* "unknown" and may not be 0, but should not be used. The @ae_5bin_hists,
* @awb_ratios and @af_statistics members are arrays of statistics per-zone.
* The zones are arranged in the array in raster order starting from the top
* left corner of the image.
*/
struct mali_c55_stats_buffer {
struct mali_c55_ae_1024bin_hist ae_1024bin_hist;
struct mali_c55_ae_1024bin_hist iridix_1024bin_hist;
struct mali_c55_ae_5bin_hist ae_5bin_hists[MALI_C55_MAX_ZONES];
__u32 reserved1[14];
struct mali_c55_awb_average_ratios awb_ratios[MALI_C55_MAX_ZONES];
__u32 reserved2[14];
struct mali_c55_af_statistics af_statistics[MALI_C55_MAX_ZONES];
__u32 reserved3[15];
} __attribute__((packed));
/**
* enum mali_c55_param_buffer_version - Mali-C55 parameters block versioning
*
* @MALI_C55_PARAM_BUFFER_V1: First version of Mali-C55 parameters block
*/
enum mali_c55_param_buffer_version {
MALI_C55_PARAM_BUFFER_V1,
};
/**
* enum mali_c55_param_block_type - Enumeration of Mali-C55 parameter blocks
*
* This enumeration defines the types of Mali-C55 parameters block. Each block
* configures a specific processing block of the Mali-C55 ISP. The block
* type allows the driver to correctly interpret the parameters block data.
*
* It is the responsibility of userspace to correctly set the type of each
* parameters block.
*
* @MALI_C55_PARAM_BLOCK_SENSOR_OFFS: Sensor pre-shading black level offset
* @MALI_C55_PARAM_BLOCK_AEXP_HIST: Auto-exposure 1024-bin histogram
* configuration
* @MALI_C55_PARAM_BLOCK_AEXP_IHIST: Post-Iridix auto-exposure 1024-bin
* histogram configuration
* @MALI_C55_PARAM_BLOCK_AEXP_HIST_WEIGHTS: Auto-exposure 1024-bin histogram
* weighting
* @MALI_C55_PARAM_BLOCK_AEXP_IHIST_WEIGHTS: Post-Iridix auto-exposure 1024-bin
* histogram weighting
* @MALI_C55_PARAM_BLOCK_DIGITAL_GAIN: Digital gain
* @MALI_C55_PARAM_BLOCK_AWB_GAINS: Auto-white balance gains
* @MALI_C55_PARAM_BLOCK_AWB_CONFIG: Auto-white balance statistics config
* @MALI_C55_PARAM_BLOCK_AWB_GAINS_AEXP: Auto-white balance gains for AEXP-0 tap
* @MALI_C55_PARAM_MESH_SHADING_CONFIG : Mesh shading tables configuration
* @MALI_C55_PARAM_MESH_SHADING_SELECTION: Mesh shading table selection
*/
enum mali_c55_param_block_type {
MALI_C55_PARAM_BLOCK_SENSOR_OFFS,
MALI_C55_PARAM_BLOCK_AEXP_HIST,
MALI_C55_PARAM_BLOCK_AEXP_IHIST,
MALI_C55_PARAM_BLOCK_AEXP_HIST_WEIGHTS,
MALI_C55_PARAM_BLOCK_AEXP_IHIST_WEIGHTS,
MALI_C55_PARAM_BLOCK_DIGITAL_GAIN,
MALI_C55_PARAM_BLOCK_AWB_GAINS,
MALI_C55_PARAM_BLOCK_AWB_CONFIG,
MALI_C55_PARAM_BLOCK_AWB_GAINS_AEXP,
MALI_C55_PARAM_MESH_SHADING_CONFIG,
MALI_C55_PARAM_MESH_SHADING_SELECTION,
};
#define MALI_C55_PARAM_BLOCK_FL_NONE 0
#define MALI_C55_PARAM_BLOCK_FL_DISABLED BIT(0)
/**
* struct mali_c55_params_block_header - Mali-C55 parameter block header
*
* This structure represents the common part of all the ISP configuration
* blocks. Each parameters block embeds an instance of this structure type
* as its first member, followed by the block-specific configuration data. The
* driver inspects this common header to discern the block type and its size and
* properly handle the block content by casting it to the correct block-specific
* type.
*
* The @type field is one of the values enumerated by
* :c:type:`mali_c55_param_block_type` and specifies how the data should be
* interpreted by the driver. The @size field specifies the size of the
* parameters block and is used by the driver for validation purposes. The
* @flags field holds a bitmask of per-block flags MALI_C55_PARAM_BLOCK_FL_*.
*
* If userspace wants to disable an ISP block the
* MALI_C55_PARAM_BLOCK_FL_DISABLED bit should be set in the @flags field. In
* that case userspace may optionally omit the remainder of the configuration
* block, which will in any case be ignored by the driver. If a new
* configuration of an ISP block has to be applied userspace shall fully
* populate the ISP block and omit setting the MALI_C55_PARAM_BLOCK_FL_DISABLED
* bit in the @flags field.
*
* Userspace is responsible for correctly populating the parameters block header
* fields (@type, @flags and @size) and correctly populate the block-specific
* parameters.
*
* For example:
*
* .. code-block:: c
*
* void populate_sensor_offs(struct mali_c55_params_block_header *block) {
* block->type = MALI_C55_PARAM_BLOCK_SENSOR_OFFS;
* block->enabled = MALI_C55_PARAM_BLOCK_FL_NONE;
* block->size = sizeof(struct mali_c55_params_sensor_off_preshading);
*
* struct mali_c55_params_sensor_off_preshading *sensor_offs =
* (struct mali_c55_params_sensor_off_preshading *)block;
*
* sensor_offs->chan00 = offset00;
* sensor_offs->chan01 = offset01;
* sensor_offs->chan10 = offset10;
* sensor_offs->chan11 = offset11;
* }
*
* @type: The parameters block type from :c:type:`mali_c55_param_block_type`
* @flags: Bitmask of block flags
* @size: Size (in bytes) of the parameters block
*/
struct mali_c55_params_block_header {
__u16 type;
__u16 flags;
__u32 size;
} __attribute__((aligned(8)));
/**
* struct mali_c55_params_sensor_off_preshading - offset subtraction for each
* color channel
*
* Provides removal of the sensor black level from the sensor data. Separate
* offsets are provided for each of the four Bayer component color channels
* which are defaulted to R, Gr, Gb, B.
*
* header.type should be set to MALI_C55_PARAM_BLOCK_SENSOR_OFFS from
* :c:type:`mali_c55_param_block_type` for this block.
*
* @header: The Mali-C55 parameters block header
* @chan00: Offset for color channel 00 (default: R)
* @chan01: Offset for color channel 01 (default: Gr)
* @chan10: Offset for color channel 10 (default: Gb)
* @chan11: Offset for color channel 11 (default: B)
*/
struct mali_c55_params_sensor_off_preshading {
struct mali_c55_params_block_header header;
__u32 chan00;
__u32 chan01;
__u32 chan10;
__u32 chan11;
};
/**
* enum mali_c55_aexp_hist_tap_points - Tap points for the AEXP histogram
* @MALI_C55_AEXP_HIST_TAP_WB: After static white balance
* @MALI_C55_AEXP_HIST_TAP_FS: After WDR Frame Stitch
* @MALI_C55_AEXP_HIST_TAP_TPG: After the test pattern generator
*/
enum mali_c55_aexp_hist_tap_points {
MALI_C55_AEXP_HIST_TAP_WB = 0,
MALI_C55_AEXP_HIST_TAP_FS,
MALI_C55_AEXP_HIST_TAP_TPG,
};
/**
* enum mali_c55_aexp_skip_x - Horizontal pixel skipping
* @MALI_C55_AEXP_SKIP_X_EVERY_2ND: Collect every 2nd pixel horizontally
* @MALI_C55_AEXP_SKIP_X_EVERY_3RD: Collect every 3rd pixel horizontally
* @MALI_C55_AEXP_SKIP_X_EVERY_4TH: Collect every 4th pixel horizontally
* @MALI_C55_AEXP_SKIP_X_EVERY_5TH: Collect every 5th pixel horizontally
* @MALI_C55_AEXP_SKIP_X_EVERY_8TH: Collect every 8th pixel horizontally
* @MALI_C55_AEXP_SKIP_X_EVERY_9TH: Collect every 9th pixel horizontally
*/
enum mali_c55_aexp_skip_x {
MALI_C55_AEXP_SKIP_X_EVERY_2ND,
MALI_C55_AEXP_SKIP_X_EVERY_3RD,
MALI_C55_AEXP_SKIP_X_EVERY_4TH,
MALI_C55_AEXP_SKIP_X_EVERY_5TH,
MALI_C55_AEXP_SKIP_X_EVERY_8TH,
MALI_C55_AEXP_SKIP_X_EVERY_9TH
};
/**
* enum mali_c55_aexp_skip_y - Vertical pixel skipping
* @MALI_C55_AEXP_SKIP_Y_ALL: Collect every single pixel vertically
* @MALI_C55_AEXP_SKIP_Y_EVERY_2ND: Collect every 2nd pixel vertically
* @MALI_C55_AEXP_SKIP_Y_EVERY_3RD: Collect every 3rd pixel vertically
* @MALI_C55_AEXP_SKIP_Y_EVERY_4TH: Collect every 4th pixel vertically
* @MALI_C55_AEXP_SKIP_Y_EVERY_5TH: Collect every 5th pixel vertically
* @MALI_C55_AEXP_SKIP_Y_EVERY_8TH: Collect every 8th pixel vertically
* @MALI_C55_AEXP_SKIP_Y_EVERY_9TH: Collect every 9th pixel vertically
*/
enum mali_c55_aexp_skip_y {
MALI_C55_AEXP_SKIP_Y_ALL,
MALI_C55_AEXP_SKIP_Y_EVERY_2ND,
MALI_C55_AEXP_SKIP_Y_EVERY_3RD,
MALI_C55_AEXP_SKIP_Y_EVERY_4TH,
MALI_C55_AEXP_SKIP_Y_EVERY_5TH,
MALI_C55_AEXP_SKIP_Y_EVERY_8TH,
MALI_C55_AEXP_SKIP_Y_EVERY_9TH
};
/**
* enum mali_c55_aexp_row_column_offset - Start from the first or second row or
* column
* @MALI_C55_AEXP_FIRST_ROW_OR_COL: Start from the first row / column
* @MALI_C55_AEXP_SECOND_ROW_OR_COL: Start from the second row / column
*/
enum mali_c55_aexp_row_column_offset {
MALI_C55_AEXP_FIRST_ROW_OR_COL = 1,
MALI_C55_AEXP_SECOND_ROW_OR_COL = 2,
};
/**
* enum mali_c55_aexp_hist_plane_mode - Mode for the AEXP Histograms
* @MALI_C55_AEXP_HIST_COMBINED: All color planes in one 1024-bin histogram
* @MALI_C55_AEXP_HIST_SEPARATE: Each color plane in one 256-bin histogram with a bin width of 16
* @MALI_C55_AEXP_HIST_FOCUS_00: Top left plane in the first bank, rest in second bank
* @MALI_C55_AEXP_HIST_FOCUS_01: Top right plane in the first bank, rest in second bank
* @MALI_C55_AEXP_HIST_FOCUS_10: Bottom left plane in the first bank, rest in second bank
* @MALI_C55_AEXP_HIST_FOCUS_11: Bottom right plane in the first bank, rest in second bank
*
* In the "focus" modes statistics are collected into two 512-bin histograms
* with a bin width of 8. One colour plane is in the first histogram with the
* remainder combined into the second. The four options represent which of the
* four positions in a bayer pattern are the focused plane.
*/
enum mali_c55_aexp_hist_plane_mode {
MALI_C55_AEXP_HIST_COMBINED = 0,
MALI_C55_AEXP_HIST_SEPARATE = 1,
MALI_C55_AEXP_HIST_FOCUS_00 = 4,
MALI_C55_AEXP_HIST_FOCUS_01 = 5,
MALI_C55_AEXP_HIST_FOCUS_10 = 6,
MALI_C55_AEXP_HIST_FOCUS_11 = 7,
};
/**
* struct mali_c55_params_aexp_hist - configuration for AEXP metering hists
*
* This struct allows users to configure the 1024-bin AEXP histograms. Broadly
* speaking the parameters allow you to mask particular regions of the image and
* to select different kinds of histogram.
*
* The skip_x, offset_x, skip_y and offset_y fields allow users to ignore or
* mask pixels in the frame by their position relative to the top left pixel.
* First, the skip_y, offset_x and offset_y fields define which of the pixels
* within each 2x2 region will be counted in the statistics.
*
* If skip_y == 0 then two pixels from each covered region will be counted. If
* both offset_x and offset_y are zero, then the two left-most pixels in each
* 2x2 pixel region will be counted. Setting offset_x = 1 will discount the top
* left pixel and count the top right pixel. Setting offset_y = 1 will discount
* the bottom left pixel and count the bottom right pixel.
*
* If skip_y != 0 then only a single pixel from each region covered by the
* pattern will be counted. In this case offset_x controls whether the pixel
* that's counted is in the left (if offset_x == 0) or right (if offset_x == 1)
* column and offset_y controls whether the pixel that's counted is in the top
* (if offset_y == 0) or bottom (if offset_y == 1) row.
*
* The skip_x and skip_y fields control how the 2x2 pixel region is repeated
* across the image data. The first instance of the region is always in the top
* left of the image data. The skip_x field controls how many pixels are ignored
* in the x direction before the pixel masking region is repeated. The skip_y
* field controls how many pixels are ignored in the y direction before the
* pixel masking region is repeated.
*
* These fields can be used to reduce the number of pixels counted for the
* statistics, but it's important to be careful to configure them correctly.
* Some combinations of values will result in colour components from the input
* data being ignored entirely, for example in the following configuration:
*
* skip_x = 0
* offset_x = 0
* skip_y = 0
* offset_y = 0
*
* Only the R and Gb components of RGGB data that was input would be collected.
* Similarly in the following configuration:
*
* skip_x = 0
* offset_x = 0
* skip_y = 1
* offset_y = 1
*
* Only the Gb component of RGGB data that was input would be collected. To
* correct things such that all 4 colour components were included it would be
* necessary to set the skip_x and skip_y fields in a way that resulted in all
* four colour components being collected:
*
* skip_x = 1
* offset_x = 0
* skip_y = 1
* offset_y = 1
*
* header.type should be set to one of either MALI_C55_PARAM_BLOCK_AEXP_HIST or
* MALI_C55_PARAM_BLOCK_AEXP_IHIST from :c:type:`mali_c55_param_block_type`.
*
* @header: The Mali-C55 parameters block header
* @skip_x: Horizontal decimation. See enum mali_c55_aexp_skip_x
* @offset_x: Skip the first column, or not. See enum mali_c55_aexp_row_column_offset
* @skip_y: Vertical decimation. See enum mali_c55_aexp_skip_y
* @offset_y: Skip the first row, or not. See enum mali_c55_aexp_row_column_offset
* @scale_bottom: Scale pixels in bottom half of intensity range: 0=1x ,1=2x, 2=4x, 4=8x, 4=16x
* @scale_top: scale pixels in top half of intensity range: 0=1x ,1=2x, 2=4x, 4=8x, 4=16x
* @plane_mode: Plane separation mode. See enum mali_c55_aexp_hist_plane_mode
* @tap_point: Tap point for histogram from enum mali_c55_aexp_hist_tap_points.
* This parameter is unused for the post-Iridix Histogram
*/
struct mali_c55_params_aexp_hist {
struct mali_c55_params_block_header header;
__u8 skip_x;
__u8 offset_x;
__u8 skip_y;
__u8 offset_y;
__u8 scale_bottom;
__u8 scale_top;
__u8 plane_mode;
__u8 tap_point;
};
/**
* struct mali_c55_params_aexp_weights - Array of weights for AEXP metering
*
* This struct allows users to configure the weighting for both of the 1024-bin
* AEXP histograms. The pixel data collected for each zone is multiplied by the
* corresponding weight from this array, which may be zero if the intention is
* to mask off the zone entirely.
*
* header.type should be set to one of either MALI_C55_PARAM_BLOCK_AEXP_HIST_WEIGHTS
* or MALI_C55_PARAM_BLOCK_AEXP_IHIST_WEIGHTS from :c:type:`mali_c55_param_block_type`.
*
* @header: The Mali-C55 parameters block header
* @nodes_used_horiz: Number of active zones horizontally [0..15]
* @nodes_used_vert: Number of active zones vertically [0..15]
* @zone_weights: Zone weighting. Index is row*col where 0,0 is the top
* left zone continuing in raster order. Each zone can be
* weighted in the range [0..15]. The number of rows and
* columns is defined by @nodes_used_vert and
* @nodes_used_horiz
*/
struct mali_c55_params_aexp_weights {
struct mali_c55_params_block_header header;
__u8 nodes_used_horiz;
__u8 nodes_used_vert;
__u8 zone_weights[MALI_C55_MAX_ZONES];
};
/**
* struct mali_c55_params_digital_gain - Digital gain value
*
* This struct carries a digital gain value to set in the ISP.
*
* header.type should be set to MALI_C55_PARAM_BLOCK_DIGITAL_GAIN from
* :c:type:`mali_c55_param_block_type` for this block.
*
* @header: The Mali-C55 parameters block header
* @gain: The digital gain value to apply, in Q5.8 format.
*/
struct mali_c55_params_digital_gain {
struct mali_c55_params_block_header header;
__u16 gain;
};
/**
* enum mali_c55_awb_stats_mode - Statistics mode for AWB
* @MALI_C55_AWB_MODE_GRBR: Statistics collected as Green/Red and Blue/Red ratios
* @MALI_C55_AWB_MODE_RGBG: Statistics collected as Red/Green and Blue/Green ratios
*/
enum mali_c55_awb_stats_mode {
MALI_C55_AWB_MODE_GRBR = 0,
MALI_C55_AWB_MODE_RGBG,
};
/**
* struct mali_c55_params_awb_gains - Gain settings for auto white balance
*
* This struct allows users to configure the gains for auto-white balance. There
* are four gain settings corresponding to each colour channel in the bayer
* domain. Although named generically, the association between the gain applied
* and the colour channel is done automatically within the ISP depending on the
* input format, and so the following mapping always holds true::
*
* gain00 = R
* gain01 = Gr
* gain10 = Gb
* gain11 = B
*
* All of the gains are stored in Q4.8 format.
*
* header.type should be set to one of either MALI_C55_PARAM_BLOCK_AWB_GAINS or
* MALI_C55_PARAM_BLOCK_AWB_GAINS_AEXP from :c:type:`mali_c55_param_block_type`.
*
* @header: The Mali-C55 parameters block header
* @gain00: Multiplier for colour channel 00
* @gain01: Multiplier for colour channel 01
* @gain10: Multiplier for colour channel 10
* @gain11: Multiplier for colour channel 11
*/
struct mali_c55_params_awb_gains {
struct mali_c55_params_block_header header;
__u16 gain00;
__u16 gain01;
__u16 gain10;
__u16 gain11;
};
/**
* enum mali_c55_params_awb_tap_points - Tap points for the AWB statistics
* @MALI_C55_AWB_STATS_TAP_PF: Immediately after the Purple Fringe block
* @MALI_C55_AWB_STATS_TAP_CNR: Immediately after the CNR block
*/
enum mali_c55_params_awb_tap_points {
MALI_C55_AWB_STATS_TAP_PF = 0,
MALI_C55_AWB_STATS_TAP_CNR,
};
/**
* struct mali_c55_params_awb_config - Stats settings for auto-white balance
*
* This struct allows the configuration of the statistics generated for auto
* white balance. Pixel intensity limits can be set to exclude overly bright or
* dark regions of an image from the statistics entirely. Colour ratio minima
* and maxima can be set to discount pixels who's ratios fall outside the
* defined boundaries; there are two sets of registers to do this - the
* "min/max" ratios which bound a region and the "high/low" ratios which further
* trim the upper and lower ratios. For example with the boundaries configured
* as follows, only pixels whos colour ratios falls into the region marked "A"
* would be counted::
*
* cr_high
* 2.0 | |
* | cb_max --> _________________________v_____
* 1.8 | | \ |
* | | \ |
* 1.6 | | \ |
* | | \ |
* c 1.4 | cb_low -->|\ A \|<-- cb_high
* b | | \ |
* 1.2 | | \ |
* r | | \ |
* a 1.0 | cb_min --> |____\_________________________|
* t | ^ ^ ^
* i 0.8 | | | |
* o | cr_min | cr_max
* s 0.6 | |
* | cr_low
* 0.4 |
* |
* 0.2 |
* |
* 0.0 |_______________________________________________________________
* 0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0
* cr ratios
*
* header.type should be set to MALI_C55_PARAM_BLOCK_AWB_CONFIG from
* :c:type:`mali_c55_param_block_type` for this block.
*
* @header: The Mali-C55 parameters block header
* @tap_point: The tap point from enum mali_c55_params_awb_tap_points
* @stats_mode: AWB statistics collection mode, see :c:type:`mali_c55_awb_stats_mode`
* @white_level: Upper pixel intensity (I.E. raw pixel values) limit
* @black_level: Lower pixel intensity (I.E. raw pixel values) limit
* @cr_max: Maximum R/G ratio (Q4.8 format)
* @cr_min: Minimum R/G ratio (Q4.8 format)
* @cb_max: Maximum B/G ratio (Q4.8 format)
* @cb_min: Minimum B/G ratio (Q4.8 format)
* @nodes_used_horiz: Number of active zones horizontally [0..15]
* @nodes_used_vert: Number of active zones vertically [0..15]
* @cr_high: R/G ratio trim high (Q4.8 format)
* @cr_low: R/G ratio trim low (Q4.8 format)
* @cb_high: B/G ratio trim high (Q4.8 format)
* @cb_low: B/G ratio trim low (Q4.8 format)
*/
struct mali_c55_params_awb_config {
struct mali_c55_params_block_header header;
__u8 tap_point;
__u8 stats_mode;
__u16 white_level;
__u16 black_level;
__u16 cr_max;
__u16 cr_min;
__u16 cb_max;
__u16 cb_min;
__u8 nodes_used_horiz;
__u8 nodes_used_vert;
__u16 cr_high;
__u16 cr_low;
__u16 cb_high;
__u16 cb_low;
};
#define MALI_C55_NUM_MESH_SHADING_ELEMENTS 3072
/**
* struct mali_c55_params_mesh_shading_config - Mesh shading configuration
*
* The mesh shading correction module allows programming a separate table of
* either 16x16 or 32x32 node coefficients for 3 different light sources. The
* final correction coefficients applied are computed by blending the
* coefficients from two tables together.
*
* A page of 1024 32-bit integers is associated to each colour channel, with
* pages stored consecutively in memory. Each 32-bit integer packs 3 8-bit
* correction coefficients for a single node, one for each of the three light
* sources. The 8 most significant bits are unused. The following table
* describes the layout::
*
* +----------- Page (Colour Plane) 0 -------------+
* | @mesh[i] | Mesh Point | Bits | Light Source |
* +-----------+------------+-------+--------------+
* | 0 | 0,0 | 16,23 | LS2 |
* | | | 08-15 | LS1 |
* | | | 00-07 | LS0 |
* +-----------+------------+-------+--------------+
* | 1 | 0,1 | 16,23 | LS2 |
* | | | 08-15 | LS1 |
* | | | 00-07 | LS0 |
* +-----------+------------+-------+--------------+
* | ... | ... | ... | ... |
* +-----------+------------+-------+--------------+
* | 1023 | 31,31 | 16,23 | LS2 |
* | | | 08-15 | LS1 |
* | | | 00-07 | LS0 |
* +----------- Page (Colour Plane) 1 -------------+
* | @mesh[i] | Mesh Point | Bits | Light Source |
* +-----------+------------+-------+--------------+
* | 1024 | 0,0 | 16,23 | LS2 |
* | | | 08-15 | LS1 |
* | | | 00-07 | LS0 |
* +-----------+------------+-------+--------------+
* | 1025 | 0,1 | 16,23 | LS2 |
* | | | 08-15 | LS1 |
* | | | 00-07 | LS0 |
* +-----------+------------+-------+--------------+
* | ... | ... | ... | ... |
* +-----------+------------+-------+--------------+
* | 2047 | 31,31 | 16,23 | LS2 |
* | | | 08-15 | LS1 |
* | | | 00-07 | LS0 |
* +----------- Page (Colour Plane) 2 -------------+
* | @mesh[i] | Mesh Point | Bits | Light Source |
* +-----------+------------+-------+--------------+
* | 2048 | 0,0 | 16,23 | LS2 |
* | | | 08-15 | LS1 |
* | | | 00-07 | LS0 |
* +-----------+------------+-------+--------------+
* | 2049 | 0,1 | 16,23 | LS2 |
* | | | 08-15 | LS1 |
* | | | 00-07 | LS0 |
* +-----------+------------+-------+--------------+
* | ... | ... | ... | ... |
* +-----------+------------+-------+--------------+
* | 3071 | 31,31 | 16,23 | LS2 |
* | | | 08-15 | LS1 |
* | | | 00-07 | LS0 |
* +-----------+------------+-------+--------------+
*
* The @mesh_scale member determines the precision and minimum and maximum gain.
* For example if @mesh_scale is 0 and therefore selects 0 - 2x gain, a value of
* 0 in a coefficient means 0.0 gain, a value of 128 means 1.0 gain and 255
* means 2.0 gain.
*
* header.type should be set to MALI_C55_PARAM_MESH_SHADING_CONFIG from
* :c:type:`mali_c55_param_block_type` for this block.
*
* @header: The Mali-C55 parameters block header
* @mesh_show: Output the mesh data rather than image data
* @mesh_scale: Set the precision and maximum gain range of mesh shading
* - 0 = 0-2x gain
* - 1 = 0-4x gain
* - 2 = 0-8x gain
* - 3 = 0-16x gain
* - 4 = 1-2x gain
* - 5 = 1-3x gain
* - 6 = 1-5x gain
* - 7 = 1-9x gain
* @mesh_page_r: Mesh page select for red colour plane [0..2]
* @mesh_page_g: Mesh page select for green colour plane [0..2]
* @mesh_page_b: Mesh page select for blue colour plane [0..2]
* @mesh_width: Number of horizontal nodes minus 1 [15,31]
* @mesh_height: Number of vertical nodes minus 1 [15,31]
* @mesh: Mesh shading correction tables
*/
struct mali_c55_params_mesh_shading_config {
struct mali_c55_params_block_header header;
__u8 mesh_show;
__u8 mesh_scale;
__u8 mesh_page_r;
__u8 mesh_page_g;
__u8 mesh_page_b;
__u8 mesh_width;
__u8 mesh_height;
__u32 mesh[MALI_C55_NUM_MESH_SHADING_ELEMENTS];
};
/** enum mali_c55_params_mesh_alpha_bank - Mesh shading table bank selection
* @MALI_C55_MESH_ALPHA_BANK_LS0_AND_LS1 - Select Light Sources 0 and 1
* @MALI_C55_MESH_ALPHA_BANK_LS1_AND_LS2 - Select Light Sources 1 and 2
* @MALI_C55_MESH_ALPHA_BANK_LS0_AND_LS2 - Select Light Sources 0 and 2
*/
enum mali_c55_params_mesh_alpha_bank {
MALI_C55_MESH_ALPHA_BANK_LS0_AND_LS1 = 0,
MALI_C55_MESH_ALPHA_BANK_LS1_AND_LS2 = 1,
MALI_C55_MESH_ALPHA_BANK_LS0_AND_LS2 = 4
};
/**
* struct mali_c55_params_mesh_shading_selection - Mesh table selection
*
* The module computes the final correction coefficients by blending the ones
* from two light source tables, which are selected (independently for each
* colour channel) by the @mesh_alpha_bank_r/g/b fields.
*
* The final blended coefficients for each node are calculated using the
* following equation:
*
* Final coefficient = (a * LS\ :sub:`b`\ + (256 - a) * LS\ :sub:`a`\) / 256
*
* Where a is the @mesh_alpha_r/g/b value, and LS\ :sub:`a`\ and LS\ :sub:`b`\
* are the node cofficients for the two tables selected by the
* @mesh_alpha_bank_r/g/b value.
*
* The scale of the applied correction may also be controlled by tuning the
* @mesh_strength member. This is a modifier to the final coefficients which can
* be used to globally reduce the gains applied.
*
* header.type should be set to MALI_C55_PARAM_MESH_SHADING_SELECTION from
* :c:type:`mali_c55_param_block_type` for this block.
*
* @header: The Mali-C55 parameters block header
* @mesh_alpha_bank_r: Red mesh table select (c:type:`enum mali_c55_params_mesh_alpha_bank`)
* @mesh_alpha_bank_g: Green mesh table select (c:type:`enum mali_c55_params_mesh_alpha_bank`)
* @mesh_alpha_bank_b: Blue mesh table select (c:type:`enum mali_c55_params_mesh_alpha_bank`)
* @mesh_alpha_r: Blend coefficient for R [0..255]
* @mesh_alpha_g: Blend coefficient for G [0..255]
* @mesh_alpha_b: Blend coefficient for B [0..255]
* @mesh_strength: Mesh strength in Q4.12 format [0..4096]
*/
struct mali_c55_params_mesh_shading_selection {
struct mali_c55_params_block_header header;
__u8 mesh_alpha_bank_r;
__u8 mesh_alpha_bank_g;
__u8 mesh_alpha_bank_b;
__u8 mesh_alpha_r;
__u8 mesh_alpha_g;
__u8 mesh_alpha_b;
__u16 mesh_strength;
};
/**
* define MALI_C55_PARAMS_MAX_SIZE - Maximum size of all Mali C55 Parameters
*
* Though the parameters for the Mali-C55 are passed as optional blocks, the
* driver still needs to know the absolute maximum size so that it can allocate
* a buffer sized appropriately to accommodate userspace attempting to set all
* possible parameters in a single frame.
*
* Some structs are in this list multiple times. Where that's the case, it just
* reflects the fact that the same struct can be used with multiple different
* header types from :c:type:`mali_c55_param_block_type`.
*/
#define MALI_C55_PARAMS_MAX_SIZE \
(sizeof(struct mali_c55_params_sensor_off_preshading) + \
sizeof(struct mali_c55_params_aexp_hist) + \
sizeof(struct mali_c55_params_aexp_weights) + \
sizeof(struct mali_c55_params_aexp_hist) + \
sizeof(struct mali_c55_params_aexp_weights) + \
sizeof(struct mali_c55_params_digital_gain) + \
sizeof(struct mali_c55_params_awb_gains) + \
sizeof(struct mali_c55_params_awb_config) + \
sizeof(struct mali_c55_params_awb_gains) + \
sizeof(struct mali_c55_params_mesh_shading_config) + \
sizeof(struct mali_c55_params_mesh_shading_selection))
/**
* struct mali_c55_params_buffer - 3A configuration parameters
*
* This struct contains the configuration parameters of the Mali-C55 ISP
* algorithms, serialized by userspace into a data buffer. Each configuration
* parameter block is represented by a block-specific structure which contains a
* :c:type:`mali_c55_params_block_header` entry as first member. Userspace
* populates the @data buffer with configuration parameters for the blocks that
* it intends to configure. As a consequence, the data buffer effective size
* changes according to the number of ISP blocks that userspace intends to
* configure.
*
* The parameters buffer is versioned by the @version field to allow modifying
* and extending its definition. Userspace shall populate the @version field to
* inform the driver about the version it intends to use. The driver will parse
* and handle the @data buffer according to the data layout specific to the
* indicated version and return an error if the desired version is not
* supported.
*
* For each ISP block that userspace wants to configure, a block-specific
* structure is appended to the @data buffer, one after the other without gaps
* in between nor overlaps. Userspace shall populate the @total_size field with
* the effective size, in bytes, of the @data buffer.
*
* The expected memory layout of the parameters buffer is::
*
* +-------------------- struct mali_c55_params_buffer ------------------+
* | version = MALI_C55_PARAM_BUFFER_V1; |
* | total_size = sizeof(struct mali_c55_params_sensor_off_preshading) |
* | sizeof(struct mali_c55_params_aexp_hist); |
* | +------------------------- data ---------------------------------+ |
* | | +--------- struct mali_c55_params_sensor_off_preshading ------+ | |
* | | | +-------- struct mali_c55_params_block_header header -----+ | | |
* | | | | type = MALI_C55_PARAM_BLOCK_SENSOR_OFFS; | | | |
* | | | | flags = MALI_C55_PARAM_BLOCK_FL_NONE; | | | |
* | | | | size = | | | |
* | | | | sizeof(struct mali_c55_params_sensor_off_preshading);| | | |
* | | | +---------------------------------------------------------+ | | |
* | | | chan00 = ...; | | |
* | | | chan01 = ...; | | |
* | | | chan10 = ...; | | |
* | | | chan11 = ...; | | |
* | | +------------ struct mali_c55_params_aexp_hist ---------------+ | |
* | | | +-------- struct mali_c55_params_block_header header -----+ | | |
* | | | | type = MALI_C55_PARAM_BLOCK_AEXP_HIST; | | | |
* | | | | flags = MALI_C55_PARAM_BLOCK_FL_NONE; | | | |
* | | | | size = sizeof(struct mali_c55_params_aexp_hist); | | | |
* | | | +---------------------------------------------------------+ | | |
* | | | skip_x = ...; | | |
* | | | offset_x = ...; | | |
* | | | skip_y = ...; | | |
* | | | offset_y = ...; | | |
* | | | scale_bottom = ...; | | |
* | | | scale_top = ...; | | |
* | | | plane_mode = ...; | | |
* | | | tap_point = ...; | | |
* | | +-------------------------------------------------------------+ | |
* | +-----------------------------------------------------------------+ |
* +---------------------------------------------------------------------+
*
* @version: The version from :c:type:`mali_c55_param_buffer_version`
* @total_size: The Mali-C55 configuration data effective size, excluding this
* header
* @data: The Mali-C55 configuration blocks data
*/
struct mali_c55_params_buffer {
__u8 version;
__u32 total_size;
__u8 data[MALI_C55_PARAMS_MAX_SIZE];
};
#endif /* __UAPI_MALI_C55_CONFIG_H */
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