[06/14] include: linux: Add uAPI file for Dreamchip RPP-X1

26921 diff mbox series

diff --git a/include/linux/media/dreamchip/rppx1-config.h b/include/linux/media/dreamchip/rppx1-config.h
new file mode 100644
index 000000000000..0042c86090f6
--- /dev/null
+++ b/include/linux/media/dreamchip/rppx1-config.h
@@ -0,0 +1,710 @@ 
+/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
+/*
+ * Dreamchip RPP-X1 ISP Driver - Userspace API
+ *
+ * Copyright (C) 2026 Renesas Electronics Corp.
+ * Copyright (C) 2026 Ideas on Board Oy
+ * Copyright (C) 2026 Ragnatech AB
+ */
+
+#ifndef __UAPI_RPP_X1_CONFIG_H
+#define __UAPI_RPP_X1_CONFIG_H
+
+#include <linux/media/v4l2-isp.h>
+
+/**
+ * struct rppx1_window - Measurement window
+ *
+ * RPP-X1 measurement window. Different blocks use a window or multiple
+ * windows for measurement purposes. This defines a common type for all of
+ * them. The number of relevant bits depends on the block where the window is
+ * used and is specified in the per-block description
+ *
+ * @h_offs: horizontal offset from the left of the frame in pixels
+ * @v_offs: vertical offset from the top of the frame in pixels
+ * @h_size: horizontal size of the window in pixels
+ * @v_size: vertical size of the window in pixels
+ */
+struct rppx1_window {
+	__u16 h_offs;
+	__u16 v_offs;
+	__u16 h_size;
+	__u16 v_size;
+};
+
+/**
+ * enum rppx1_meas_chan - Measurement point for the Histogram and EXM Modules
+ *
+ * Measurement points for the RPP-X1 Histogram measurement module and Exposure
+ * measurement module.
+ *
+ * All tap points are available for the PRE1/PRE2 pipes. Only
+ * RPPX1_MEAS_CHAN_SEL4 and RPPX1_MEAS_CHAN_SEL7 are available for the
+ * MAIN_POST pipe.
+ *
+ * @RPPX1_MEAS_CHAN_SEL0: after input acquisition
+ * @RPPX1_MEAS_CHAN_SEL1: after black level subtraction
+ * @RPPX1_MEAS_CHAN_SEL2: after sensor gamma linearization
+ * @RPPX1_MEAS_CHAN_SEL3: after lens shading correction
+ * @RPPX1_MEAS_CHAN_SEL4: after auto white balance gains
+ * @RPPX1_MEAS_CHAN_SEL5: after defect pixel correction
+ * @RPPX1_MEAS_CHAN_SEL6: after denoise pre-filter
+ * @RPPX1_MEAS_CHAN_SEL7: after demosaicing
+ */
+enum rppx1_meas_chan {
+	RPPX1_MEAS_CHAN_SEL0,
+	RPPX1_MEAS_CHAN_SEL1,
+	RPPX1_MEAS_CHAN_SEL2,
+	RPPX1_MEAS_CHAN_SEL3,
+	RPPX1_MEAS_CHAN_SEL4,
+	RPPX1_MEAS_CHAN_SEL5,
+	RPPX1_MEAS_CHAN_SEL6,
+	RPPX1_MEAS_CHAN_SEL7,
+};
+
+/* ---------------------------------------------------------------------------
+ * Parameter Structures
+ *
+ * The same ISP block might be instantiated in multiple pipeliness and operate
+ * on a different bitdepth/precision. For fields of varying length among
+ * different instances of the same block, use a data type that can accommodate
+ * the larger bitdepth/precision.
+ */
+
+/**
+ * enum rppx1_params_block_type - RPP-X1 extensible params block types
+ *
+ * NOTE: Only append to the enumeration as the numbers are uAPI.
+ *
+ * @RPPX1_PARAMS_BLOCK_TYPE_WBMEAS_POST: AWB Measurement Configuration
+ * @RPPX1_PARAMS_BLOCK_TYPE_AWBG_PRE1: PRE1 pipe White Balance Gains
+ * @RPPX1_PARAMS_BLOCK_TYPE_AWBG_PRE2: PRE2 White Balance Gains
+ * @RPPX1_PARAMS_BLOCK_TYPE_AWBG_POST: MAIN_POST White Balance Gains
+ * @RPPX1_PARAMS_BLOCK_TYPE_EXM_PRE1: PRE1 pipe Exposure Measurement
+ * @RPPX1_PARAMS_BLOCK_TYPE_EXM_PRE2: PRE2 pipe Exposure Measurement
+ * @RPPX1_PARAMS_BLOCK_TYPE_HIST_PRE1: PRE1 pipe Histogram Measurement
+ * @RPPX1_PARAMS_BLOCK_TYPE_HIST_PRE2: PRE2 pipe Histogram Measurement
+ * @RPPX1_PARAMS_BLOCK_TYPE_HIST_POST: POST pipe Histogram Measurement
+ * @RPPX1_PARAMS_BLOCK_TYPE_BLS_PRE1: PRE1 pipe Black Level Subtraction
+ * @RPPX1_PARAMS_BLOCK_TYPE_BLS_PRE2: PRE2 pipe Black Level Subtraction
+ * @RPPX1_PARAMS_BLOCK_TYPE_CCOR_POST: POST pipe Color Correction
+ * @RPPX1_PARAMS_BLOCK_TYPE_LSC_PRE1: PRE1 pipe Lens Shading Correction
+ * @RPPX1_PARAMS_BLOCK_TYPE_LSC_PRE2: PRE2 pipe Lens Shading Correction
+ * @RPPX1_PARAMS_BLOCK_TYPE_GA_HV: Human Vision Pipe Gamma Out Correction
+ * @RPPX1_PARAMS_BLOCK_TYPE_GA_MV: Machine Vision Gamma Out Correction
+ * @RPPX1_PARAMS_BLOCK_TYPE_LIN_PRE1: PRE1 pipe Linearization (Sensor De-gamma)
+ * @RPPX1_PARAMS_BLOCK_TYPE_LIN_PRE2: PRE2 pipe Linearization (Sensor De-gamma)
+ */
+enum rppx1_params_block_type {
+	RPPX1_PARAMS_BLOCK_TYPE_WBMEAS_POST,
+	RPPX1_PARAMS_BLOCK_TYPE_AWBG_PRE1,
+	RPPX1_PARAMS_BLOCK_TYPE_AWBG_PRE2,
+	RPPX1_PARAMS_BLOCK_TYPE_AWBG_POST,
+	RPPX1_PARAMS_BLOCK_TYPE_EXM_PRE1,
+	RPPX1_PARAMS_BLOCK_TYPE_EXM_PRE2,
+	RPPX1_PARAMS_BLOCK_TYPE_HIST_PRE1,
+	RPPX1_PARAMS_BLOCK_TYPE_HIST_PRE2,
+	RPPX1_PARAMS_BLOCK_TYPE_HIST_POST,
+	RPPX1_PARAMS_BLOCK_TYPE_BLS_PRE1,
+	RPPX1_PARAMS_BLOCK_TYPE_BLS_PRE2,
+	RPPX1_PARAMS_BLOCK_TYPE_CCOR_POST,
+	RPPX1_PARAMS_BLOCK_TYPE_LSC_PRE1,
+	RPPX1_PARAMS_BLOCK_TYPE_LSC_PRE2,
+	RPPX1_PARAMS_BLOCK_TYPE_GA_HV,
+	RPPX1_PARAMS_BLOCK_TYPE_GA_MV,
+	RPPX1_PARAMS_BLOCK_TYPE_LIN_PRE1,
+	RPPX1_PARAMS_BLOCK_TYPE_LIN_PRE2,
+};
+
+/**
+ * enum rppx1_wbmeas_mode - AWB measurement mode
+ *
+ * @RPPX1_WBMEAS_MODE_YCBCR: YCbCr measurement mode
+ * @RPPX1_WBMEAS_MODE_RGB: RGB measurement mode
+ */
+enum rppx1_wbmeas_mode {
+	RPPX1_WBMEAS_MODE_YCBCR,
+	RPPX1_WBMEAS_MODE_RGB,
+};
+
+/**
+ * struct rppx1_wbmeas_params - AWB measurement configuration
+ *
+ * The Auto-White Balance measurement module is available on the MAIN_POST pipe.
+ * It supports two measurement modes, selected by the @mode field. The
+ * measurement window is programmed through the @wnd field.
+ *
+ * To support measurement in YCbCr mode a color conversion matrix with
+ * programmable offset is available in the @ccor_coeff and @ccor_offs fields.
+ * The color conversion matrix coefficients are represented as 16 bits signed
+ * Q4.12 numbers ranging from -8 to +7.99. The per-color channel offsets are
+ * represented as 25 bits 2's complement integer numbers ranging from -16777216
+ * to +16777215.
+ *
+ * @header: block header (type = RPPX1_PARAMS_BLOCK_TYPE_WBMEAS_POST)
+ * @mode: measurement mode (from enum rppx1_wbmeas_mode)
+ * @ymax_cmp: enable Y_MAX compare using @max_y
+ * @wnd: measurement window
+ * @frames: number of frames for mean value calculation (0 = 1 frame)
+ * @ref_cr_max_r: reference Cr or max red value in RGB mode, 24 bits
+ * @ref_cb_max_b: reference Cb or max blue value in RGB mode, 24 bits
+ * @min_y_max_g: luminance minimum value or max green value in RGB mode, 24 bits
+ * @max_y: luminance maximum value, only valid if @mode is set to YCbCr and
+ *	   @ymax_cmp is set to enabled, 24 bits
+ * @max_csum: chrominance sum maximum value, 24 bits
+ * @min_c: chrominance minimum value, 24 bits
+ * @ccor_coeff: coefficients for color conversion matrix, signed 16 bits Q4.6
+ * @ccor_offs: R-G-B color conversion coefficients, signed 25 bits 2's complement
+ */
+struct rppx1_wbmeas_params {
+	struct v4l2_isp_params_block_header header;
+	__u8 mode;
+	__u8 ymax_cmp;
+	struct rppx1_window wnd;
+	__u8 frames;
+	__u32 ref_cr_max_r;
+	__u32 ref_cb_max_b;
+	__u32 min_y_max_g;
+	__u32 max_y;
+	__u32 max_csum;
+	__u32 min_c;
+	__u16 ccor_coeff[3][3];
+	__u32 ccor_offs[3];
+};
+
+/**
+ * struct rppx1_awbg_params  - WB gain configuration
+ *
+ * The RPP-X1 White Balance Gain module is available in the PRE1 and PRE2
+ * pre-fusion pipes and in the MAIN_POST post-fusion pipe. Userspace selects
+ * which pipe to operate by setting the @header.type field to
+ * RPPX1_PARAMS_BLOCK_TYPE_AWBG_PRE1, RPPX1_PARAMS_BLOCK_TYPE_AWBG_PRE2
+ * or RPPX1_PARAMS_BLOCK_TYPE_AWBG_POST.
+ *
+ * The White Balance module allows to specify per-color channel gains, expressed
+ * as unsigned fixed-point values as 18 bits unsigned integers in Q6.12 format
+ * with a maximum of 63.999.
+ *
+ * @header: block header (type = RPPX1_PARAMS_BLOCK_TYPE_AWBG_PRE1 or
+ *	    type = RPPX1_PARAMS_BLOCK_TYPE_AWBG_PRE2 or
+ *	    type = RPPX1_PARAMS_BLOCK_TYPE_AWBG_POST)
+ * @gain_red: gain for red component, 18-bit (unsigned Q6.12)
+ * @gain_green_r: gain for green component in red lines, 18-bit (unsigned Q6.12)
+ * @gain_blue: gain for blue component, 18-bit (unsigned Q6.12)
+ * @gain_green_b: gain for green component in blue lines, 18-bit (unsigned Q6.12)
+ */
+struct rppx1_awbg_params {
+	struct v4l2_isp_params_block_header header;
+	__u32 gain_red;
+	__u32 gain_green_r;
+	__u32 gain_blue;
+	__u32 gain_green_b;
+};
+
+/**
+ * enum rppx1_exm_mode - Exposure measurement mode
+ *
+ * Exaposure measurement mode selection (RGB/Bayer).
+ *
+ * @RPPX1_EXP_MEASURING_MODE_DISABLED: no measurement
+ * @RPPX1_EXP_MEASURING_MODE_RGB: Y/R/G/B measurement
+ * @RPPX1_EXP_MEASURING_MODE_BAYER: Bayer RGB measurement
+ */
+enum rppx1_exm_mode {
+	RPPX1_EXP_MEASURING_MODE_DISABLED,
+	RPPX1_EXP_MEASURING_MODE_RGB,
+	RPPX1_EXP_MEASURING_MODE_BAYER,
+};
+
+/**
+ * struct rppx1_exm_params - Exposure measurement configuration
+ *
+ * The RPP-X1 Exposure measurement unit is available on the PRE1 and PRE2
+ * pre-fusion pipes. Userspace selects which pipe to operate by setting
+ * the @header.type field to RPPX1_PARAMS_BLOCK_TYPE_EXM_PRE1 or
+ * RPPX1_PARAMS_BLOCK_TYPE_EXM_PRE2.
+ *
+ * Exposure measurement is performed in the RGB or Bayer domain, according to
+ * the setting of the @mode field. The exposure measurement tap point is
+ * selected according to the value of @channel_sel.
+ *
+ * The exposure measurement is performed on an input window specified in @wnd.
+ * To each color component a programmable weight coefficient is associated.
+ * Coefficients are represented as unsigned 8 bits integer values in Q1.7 format
+ * ranging from 0 to 1.992.
+ *
+ * The @last_line fields controls when the exposure measurement completes. It
+ * is usually programmed to the value of (@wnd.v_offs + @wnd.v_size + 1).
+ *
+ * @header: block header (type = RPPX1_PARAMS_BLOCK_TYPE_EXM_PRE1 or
+ *	    type = RPPX1_PARAMS_BLOCK_TYPE_EXM_PRE2)
+ * @mode: exposure measure mode (from enum rppx1_exm_mode)
+ * @channel_sel: exposure measurement point (see enum rppx1_meas_chan)
+ * @last_line: line number for which the exposure measurement completes
+ * @wnd: measurement window coordinates
+ * @coeff_r: coefficient for the red Bayer sample or red color channel, Q1.7
+ * @coeff_g_gr: coefficient for the green/red Bayer sample or green color channel, Q1.7
+ * @coeff_b: coefficient for the blue Bayer sample or blue color channel, Q1.7
+ * @coeff_gb: coefficient for the green/blue Bayer sample, unused in RGB mode, Q1.7
+ */
+struct rppx1_exm_params {
+	struct v4l2_isp_params_block_header header;
+	__u32 mode;
+	__u8 channel_sel;
+	__u32 last_line;
+	struct rppx1_window wnd;
+	__u8 coeff_r;
+	__u8 coeff_g_gr;
+	__u8 coeff_b;
+	__u8 coeff_gb;
+};
+
+/* Histogram */
+#define RPPX1_HIST_WEIGHT_GRIDS_SIZE 25
+
+/**
+ * enum rppx1_hist_mode - Histogram measurement mode
+ *
+ * Histogram measurement mode. Select which channel or combination of channels
+ * the histogram measurement is performed on.
+ *
+ * @RPPX1_HIST_MODE_DISABLE: histogram disabled
+ * @RPPX1_HIST_MODE_RGB_COMBINED: combined RGB histogram
+ * @RPPX1_HIST_MODE_R_HISTOGRAM: red channel histogram
+ * @RPPX1_HIST_MODE_GR_HISTOGRAM: green/red channel histogram
+ * @RPPX1_HIST_MODE_B_HISTOGRAM: blue channel histogram
+ * @RPPX1_HIST_MODE_GB_HISTOGRAM: green/blue histogram
+ */
+enum rppx1_hist_mode {
+	RPPX1_HIST_MODE_DISABLE,
+	RPPX1_HIST_MODE_RGB_COMBINED,
+	RPPX1_HIST_MODE_R_HISTOGRAM,
+	RPPX1_HIST_MODE_GR_HISTOGRAM,
+	RPPX1_HIST_MODE_B_HISTOGRAM,
+	RPPX1_HIST_MODE_GB_HISTOGRAM,
+};
+
+/**
+ * struct rppx1_hist_params - Histogram measurement configuration
+ *
+ * The RPP-X1 Histogram measurement unit is available on the PRE1, PRE2 and
+ * MAIN_POST pipes. Userspace selects which pipe to operate by setting the
+ * @header.type field to RPPX1_PARAMS_BLOCK_TYPE_HIST_PRE1,
+ * RPPX1_PARAMS_BLOCK_TYPE_HIST_PRE2 or
+ * RPPX1_PARAMS_BLOCK_TYPE_HIST_POST.
+ *
+ * The histogram measurement point is selected using the @channel field while
+ * histogram measurement mode is selected using the @mode field.
+ *
+ * Histogram measurement is performed by programming subsampling factors using
+ * the @v_stepsize and @h_step_inc fields and by weighted windowing, by
+ * programming the size of the measurement window @wnd with @weights associated
+ * to each cell of the 5x5 measurement grid. Weights are represented as 5 bits
+ * integer values ranging from 0 to 16.
+ *
+ * The @last_line fields controls when the histogram measurement completes. It
+ * is usually programmed to the value of (@wnd.v_offs + @wnd.v_size - 1).
+ *
+ * Histogram values are calculated by applying a per-color channel coefficient
+ * represented as an 8 bits unsigned Q1.7 integer value. The @sample_offs and
+ * @sample_shift fields allow to reduce the color dynamic range on which
+ * histogram data are produced.
+ *
+ * @header: block header (type = RPPX1_PARAMS_BLOCK_TYPE_HIST_PRE1,
+ *	    type = RPPX1_PARAMS_BLOCK_TYPE_HIST_PRE2 or
+ *	    type = RPPX1_PARAMS_BLOCK_TYPE_HIST_POST)
+ * @mode: histogram measurement mode (from enum rppx1_hist_mode)
+ * @channel_sel: histogram measurement point (see enum rppx1_meas_chan)
+ * @wnd: measurement window coordinates
+ * @weights: weighting factors for each sub-window (5x5 grid)
+ * @last_line: line number for which the histogram measurement completes
+ * @v_stepsize: vertical subsampling divider, 7 bits
+ * @h_step_inc: horizontal subsampling step counter, 17 bits
+ * @coeff: R-G-B coefficients, 8 bits unsigned Q1.7
+ * @sample_offs: sample offset, 24 bits
+ * @sample_shift: sample shift, 4 bits
+ */
+struct rppx1_hist_params {
+	struct v4l2_isp_params_block_header header;
+	__u8 mode;
+	__u8 channel_sel;
+	struct rppx1_window wnd;
+	__u8 weights[RPPX1_HIST_WEIGHT_GRIDS_SIZE];
+	__u32 last_line;
+	__u32 v_stepsize;
+	__u32 h_step_inc;
+	__u8 coeff[3];
+	__u32 sample_offs;
+	__u8 sample_shift;
+};
+
+/**
+ * struct rppx1_bls_fixed - BLS fixed subtraction values
+ *
+ * Fixed black level values subtracted from sensor data per Bayer channel.
+ * Negative values result in addition.
+ *
+ * The PRE1 pipe BLS module operates on a 24-bits input data and fixed black
+ * levels are stored as a signed 2's complement representation ranging from
+ * -2^24 to 2^24-1.
+ *
+ * The PRE2 pipe BLS module operates on a 12-bits input data and fixed black
+ * levels are stored as a signed 2's complement representation ranging from
+ * -2^12 to 2^12-1.
+ *
+ * Userspace is expected to provide fixed black level values with a bit-depth
+ * matching the one of pipe in use.
+ *
+ * These subtraction values are matched with the sensor native Bayer components
+ * ordering according to the cropping configuration on the input port.
+ *
+ * @a: subtraction value for channel A
+ * @b: subtraction value for channel B
+ * @c: subtraction value for channel C
+ * @d: subtraction value for channel D
+ */
+struct rppx1_bls_fixed {
+	__u32 a;
+	__u32 b;
+	__u32 c;
+	__u32 d;
+};
+
+/**
+ * enum rppx1_bls_mode - BLS subtraction mode
+ *
+ * Select if subtracted black level come from fixed or measured values.
+ *
+ * @RPPX1_BLS_MODE_FIXED: subtract fixed values
+ * @RPPX1_BLS_MODE_MEAS: subtract measured values
+ */
+enum rppx1_bls_mode {
+	RPPX1_BLS_MODE_FIXED,
+	RPPX1_BLS_MODE_MEAS,
+};
+
+/**
+ * enum rppx1_bls_win_en: BLS measurement configuration
+ *
+ * Select the measurement window to use for measured black level values.
+ *
+ * @RPPX1_BLS_WIN_EN_OFF: disable measurement
+ * @RPPX1_BLS_WIN_EN_WIN1: Enable measurement from window 1
+ * @RPPX1_BLS_WIN_EN_WIN2: enable measurement from window 2
+ * @RPPX1_BLS_WIN_EN_WIN12: enable measurement from window 1 and window 2
+ */
+enum rppx1_bls_win_en {
+	RPPX1_BLS_WIN_EN_OFF,
+	RPPX1_BLS_WIN_EN_WIN1,
+	RPPX1_BLS_WIN_EN_WIN2,
+	RPPX1_BLS_WIN_EN_WIN12,
+};
+
+/**
+ * struct rppx1_bls_params - RPP-X1 Black Level Subtraction Module
+ *
+ * The RPP-X1 Black Level Subtraction module is available on the PRE1 and PRE2
+ * pre-fusion pipes. Userspace selects which pipe to operate by setting the
+ * @header.type field to RPPX1_PARAMS_BLOCK_TYPE_BLS_PRE1 or
+ * RPPX1_PARAMS_BLOCK_TYPE_BLS_PRE2.
+ *
+ * The BLS module operates on fixed or measured data according to the setting of
+ * the @mode field. When RPPX1_BLS_MODE_FIXED is used userspace shall provide
+ * the per-channel black levels in @fixed. When RPPX1_BLS_MODE_MEAS is used
+ * userspace shall configure the measurement windows @window1 and optionally
+ * @window2 to select the optically black pixels region in the input frame. The
+ * @samples fields controls how many measure samples are used for averaging the
+ * measured black levels.
+ *
+ * @header: block header (type = RPPX1_PARAMS_BLOCK_TYPE_BLS_PRE1 or
+ *	    type == RPPX1_PARAMS_BLOCK_TYPE_BLS_PRE2)
+ * @mode: BLS subtraction mode (see enum rppx1_bls_mode)
+ * @en_windows: BLS measurement mode (see rppx1_bls_win_en)
+ * @samples: log2 of the number of measured pixels per Bayer position
+ * @window1: BLS measurement window 1 (14 bits)
+ * @window2: BLS measurement window 2 (14 bits)
+ * @fixed: fixed subtraction values (see enum rppx1_bls_fixed)
+ */
+struct rppx1_bls_params {
+	struct v4l2_isp_params_block_header header;
+	__u8 mode;
+	__u8 en_windows;
+	__u8 samples;
+	struct rppx1_window window1;
+	struct rppx1_window window2;
+	struct rppx1_bls_fixed fixed;
+};
+
+/**
+ * struct rppx1_ccor_params - Color CORrection configuration
+ *
+ * The CCOR (Color Correction) module is available on the MAIN_POST pipe. It
+ * performs color space correction on a pixel-per-pixel basis using a 3x3 matrix
+ * of coefficients and per-color channel offsets.
+ *
+ * The matrix coefficients are represented as 16 bits signed fixed point values
+ * in Q4.12 format ranging from -8 to +7.999.
+ *
+ * The per-channel color offsets are represented as 2's complement values
+ * stored in 25 bits ranging from -16777216 to 16777215.
+ *
+ * @header: block header (type = RPPX1_PARAMS_BLOCK_TYPE_CCOR_POST)
+ * @coeff: color correction matrix coefficients, 16 bits signed Q4.12
+ * @offset: R, G, B offsets, 2's complement 25 bits
+ */
+struct rppx1_ccor_params {
+	struct v4l2_isp_params_block_header header;
+	__u16 coeff[3][3];
+	__u32 offset[3];
+};
+
+/* Lens Shade Correction */
+#define RPPX1_LSC_SAMPLES_MAX 17
+#define RPPX1_LSC_NUM_SECTORS 16
+
+/**
+ * struct rppx1_lsc_params - Lens Shading Correction configuration
+ *
+ * The RPP-X1 Lens shading correction module is available on the PRE1 and PRE2
+ * pre-fusion pipes. Userspace selects which pipe to operate by setting the
+ * @header.type field to RPPX1_PARAMS_BLOCK_TYPE_LSC_PRE1 or
+ * RPPX1_PARAMS_BLOCK_TYPE_LSC_PRE2.
+ *
+ * The module applies per-color channel correction factors @r_data, @gr_data,
+ * @gb_data and @b_data as a 16x16 grid mapped on the image. The size of each
+ * grid segment is expressed by the @x_sect_size and @y_sect_size arrays.  Each
+ * segment shall be at least 8 pixels in size and the sum of all horizontal
+ * segments @x_sect_size shall match the input frame size width.
+ *
+ * The correction factors values are expressed as unsigned Q2.10 integers
+ * ranging from 1 to 3.999.
+ *
+ * Pre-calculated interpolation factors shall be provided in the @x_grad
+ * and @y_grad fields, expressed as 12 bits integer values.
+ *
+ * @header: block header (type = RPPX1_PARAMS_BLOCK_TYPE_LSC)
+ * @r_data: correction factors for the red channel in Q2.10 format
+ * @gr_data: correction factors for the green (red) channel in Q2.10 format
+ * @gb_data: correction factors for the green (blue) channel in Q2.10 format
+ * @b_data: correction factors for the blue channel in Q2.10 format
+ * @x_grad: Interpolation gradients for each horizontal sector (12 bits)
+ * @y_grad: Interpolation gradients for each vertical sector (12 bits)
+ * @x_sect_size: Horizontal sectors sizes
+ * @y_sect_size: Vertical sectors sizes
+ */
+struct rppx1_lsc_params {
+	struct v4l2_isp_params_block_header header;
+	__u16 r_data[RPPX1_LSC_SAMPLES_MAX][RPPX1_LSC_SAMPLES_MAX];
+	__u16 gr_data[RPPX1_LSC_SAMPLES_MAX][RPPX1_LSC_SAMPLES_MAX];
+	__u16 gb_data[RPPX1_LSC_SAMPLES_MAX][RPPX1_LSC_SAMPLES_MAX];
+	__u16 b_data[RPPX1_LSC_SAMPLES_MAX][RPPX1_LSC_SAMPLES_MAX];
+	__u16 x_grad[RPPX1_LSC_NUM_SECTORS];
+	__u16 y_grad[RPPX1_LSC_NUM_SECTORS];
+	__u16 x_sect_size[RPPX1_LSC_NUM_SECTORS];
+	__u16 y_sect_size[RPPX1_LSC_NUM_SECTORS];
+};
+
+/* Gamma Out */
+#define RPPX1_GA_MAX_SAMPLES 17
+
+/**
+ * enum rppx1_ga_seg_mode - Gamma out curve segmentation mode
+ *
+ * Segmentation mode of the 16 input sampling points for the Gamma Out
+ * Correction module.
+ *
+ * @RPPX1_GA_SEG_MODE_LOGARITHMIC: logarithmic-like segmentation mode
+ * @RPPX1_GA_SEG_MODE_EQUIDISTANT: equidistant segmentation mode
+ */
+enum rppx1_ga_seg_mode {
+	RPPX1_GA_SEG_MODE_LOGARITHMIC,
+	RPPX1_GA_SEG_MODE_EQUIDISTANT
+};
+
+/**
+ * struct rppx1_ga_params - Gamma Out Correction configuration
+ *
+ * The Gamma Out Correction module is available on the Human Vision Output
+ * Pipe (HV) and the Machine Vision Output Pipe (MV). Userspace selects
+ * which pipe to operate by setting the @header.type field to
+ * RPPX1_PARAMS_BLOCK_TYPE_GA_HV or RPPX1_PARAMS_BLOCK_TYPE_GA_MV.
+ *
+ * The module allows to apply a @gamma_y gamma correction curve to RGB data
+ * represented as a table of 16 entries. The 16 input sampling points can be
+ * equidistant or segmented using a logarithmic scale according to the value of
+ * @mode.
+ *
+ * The gamma curve values are 12 bits on the HV output pipe and 24 bits on the
+ * MV output pipe. Userspace is expected to provide the curve values with a
+ * bit-depth matching the one of pipe in use.
+ *
+ * @header: block header (type = RPPX1_PARAMS_BLOCK_TYPE_GA_HV or
+ *	    type = RPPX1_PARAMS_BLOCK_TYPE_GA_MV)
+ * @mode: gamma curve input segmentation mode (see rppx1_ga_seg_mode)
+ * @gamma_y: gamma out curve y-axis values
+ */
+struct rppx1_ga_params {
+	struct v4l2_isp_params_block_header header;
+	__u8 mode;
+	__u32 gamma_y[RPPX1_GA_MAX_SAMPLES];
+};
+
+/* Linearization (Sensor De-gamma) */
+#define RPPX1_LIN_SAMPLE_POINTS_NUM 16
+#define RPPX1_LIN_DEGAMMA_CURVE_NUM 17
+
+/**
+ * struct rppx1_lin_params - Linearization (Sensor De-gamma) configuration
+ *
+ * The RPP-X1 linearization module is available on the PRE1 and PRE2 pre-fusion
+ * pipes. Userspace selects which pipe to operate by setting the @header.type
+ * field to RPPX1_PARAMS_BLOCK_TYPE_LIN_PRE1 or
+ * RPPX1_PARAMS_BLOCK_TYPE_LIN_PRE2.
+ *
+ * The LIN module applies the per-color channel de-gamma linearization curves
+ * @curve_r, @curve_g and @curve_b defined on the input sampling points @dx.
+ *
+ * For the PRE1 pipe the de-gamma curves values are 24-bits, for the PRE2 pipe
+ * the de-gamma curve values are 12-bits.
+ *
+ * For the PRE1 pipe de-gamma module sampling points @dx values are in the range
+ * [0, 15] (4 bits). For the PRE2 pipe de-gamma module sampling points values
+ * are in the range [0, 7] (3 bits).
+ *
+ * Userspace is expected to provide the curve values and sampling points with a
+ * bit-depth matching the one of pipe in use.
+ *
+ * @header: block header (type = RPPX1_PARAMS_BLOCK_TYPE_LIN_PRE1 or
+ *	    RPPX1_PARAMS_BLOCK_TYPE_LIN_PRE2)
+ * @curve_r: de-gamma linearization curve for red channel
+ * @curve_g: de-gamma linearization curve for green channel
+ * @curve_b: de-gamma linearization curve for blue channel
+ * @dx: input sampling points
+ */
+struct rppx1_lin_params {
+	struct v4l2_isp_params_block_header header;
+	__u32 curve_r[RPPX1_LIN_DEGAMMA_CURVE_NUM];
+	__u32 curve_g[RPPX1_LIN_DEGAMMA_CURVE_NUM];
+	__u32 curve_b[RPPX1_LIN_DEGAMMA_CURVE_NUM];
+	__u8 dx[RPPX1_LIN_SAMPLE_POINTS_NUM];
+};
+
+/**
+ * RPPX1_PARAMS_MAX_SIZE - Maximum size of all RPP-X1 parameter blocks
+ *
+ * Some types are reported twice as the same block might be instantiated in
+ * multiple pipes.
+ */
+#define RPPX1_PARAMS_MAX_SIZE						\
+	(sizeof(struct rppx1_wbmeas_params)			+	\
+	sizeof(struct rppx1_awbg_params)			+	\
+	sizeof(struct rppx1_awbg_params)			+	\
+	sizeof(struct rppx1_awbg_params)			+	\
+	sizeof(struct rppx1_exm_params)				+	\
+	sizeof(struct rppx1_exm_params)				+	\
+	sizeof(struct rppx1_hist_params)			+	\
+	sizeof(struct rppx1_hist_params)			+	\
+	sizeof(struct rppx1_hist_params)			+	\
+	sizeof(struct rppx1_bls_params)				+	\
+	sizeof(struct rppx1_bls_params)				+	\
+	sizeof(struct rppx1_ccor_params)			+	\
+	sizeof(struct rppx1_lsc_params)				+	\
+	sizeof(struct rppx1_lsc_params)				+	\
+	sizeof(struct rppx1_ga_params)				+	\
+	sizeof(struct rppx1_ga_params)				+	\
+	sizeof(struct rppx1_lin_params)				+	\
+	sizeof(struct rppx1_lin_params))
+
+/* ---------------------------------------------------------------------------
+ * Statistics Structures
+ *
+ * The same ISP block might be instantiated in multiple pipeliness and operate
+ * on a different bitdepth/precision. For fields of varying length among
+ * different instances of the same block, use a data type that can accommodate
+ * the larger bitdepth/precision.
+ */
+
+/**
+ * enum rppx1_stats_block_type - RPP-X1 extensible stats block types
+ *
+ * NOTE: Only append to the enumeration as the numbers are uAPI.
+ *
+ * @RPPX1_STATS_BLOCK_TYPE_WBMEAS_POST: post-fusion white-balance measurement
+ * @RPPX1_STATS_BLOCK_TYPE_EXM_PRE1: pre-fusion pipe1 exposure measurement
+ * @RPPX1_STATS_BLOCK_TYPE_EXM_PRE2: pre-fusion pipe2 exposure measurement
+ * @RPPX1_STATS_BLOCK_TYPE_HIST_PRE1: pre-fusion pipe1 histogram
+ * @RPPX1_STATS_BLOCK_TYPE_HIST_PRE2: pre-fusion pipe2 histogram
+ * @RPPX1_STATS_BLOCK_TYPE_HIST_POST: post-fusion histogram
+ */
+enum rppx1_stats_block_type {
+	RPPX1_STATS_BLOCK_TYPE_WBMEAS_POST,
+	RPPX1_STATS_BLOCK_TYPE_EXM_PRE1,
+	RPPX1_STATS_BLOCK_TYPE_EXM_PRE2,
+	RPPX1_STATS_BLOCK_TYPE_HIST_PRE1,
+	RPPX1_STATS_BLOCK_TYPE_HIST_PRE2,
+	RPPX1_STATS_BLOCK_TYPE_HIST_POST,
+};
+
+/**
+ * struct rppx1_wbmeas_stats - AWB statistics
+ *
+ * @header: block header (type = RPPX1_STATS_BLOCK_TYPE_WBMEAS_POST)
+ * @cnt: Number of pixels matched
+ * @mean_y_or_g: mean Y (or G in RGB mode) value, 24-bit
+ * @mean_cb_or_b: mean Cb (or B in RGB mode) value, 24-bit
+ * @mean_cr_or_r: mean Cr (or R in RGB mode) value, 24-bit
+ */
+struct rppx1_wbmeas_stats {
+	struct v4l2_isp_block_header header;
+	__u32 cnt;
+	__u32 mean_y_or_g;
+	__u32 mean_cb_or_b;
+	__u32 mean_cr_or_r;
+};
+
+/* Exposure Measurement */
+#define RPPX1_EXM_NUM_WIN 25
+
+/**
+ * struct rppx1_exm_stats - Exposure measurement
+ *
+ * RPP-X1 exposure measurement calculates the mean value on 25 programmable
+ * windows on the input picture.
+ *
+ * @header: block header (type = RPPX1_STATS_BLOCK_TYPE_EXM_PRE1)
+ * @exp_mean: mean luminance values per block, up to 20-bit
+ */
+struct rppx1_exm_stats {
+	struct v4l2_isp_block_header header;
+	__u32 exp_mean[RPPX1_EXM_NUM_WIN];
+};
+
+/* Histogram */
+#define RPPX1_HIST_NUM_BINS 32
+
+/**
+ * struct rppx1_hist_stats - Histogram statistics
+ *
+ * @header: block header (type = RPPX1_STATS_BLOCK_TYPE_HIST_POST)
+ * @hist_bins: accumulation histogram results in unsigned 20-bit Q16.4 format
+ */
+struct rppx1_hist_stats {
+	struct v4l2_isp_block_header header;
+	__u32 hist_bins[RPPX1_HIST_NUM_BINS];
+};
+
+/**
+ * RPPX1_STATS_MAX_SIZE - Maximum size of all RPP-X1 statistics
+ *
+ * Some types are reported twice as the same block might be instantiated in
+ * multiple pipes.
+ */
+#define RPPX1_STATS_MAX_SIZE						\
+	(sizeof(struct rppx1_wbmeas_stats)			+	\
+	sizeof(struct rppx1_exm_stats)				+	\
+	sizeof(struct rppx1_exm_stats)				+	\
+	sizeof(struct rppx1_hist_stats)				+	\
+	sizeof(struct rppx1_hist_stats)				+	\
+	sizeof(struct rppx1_hist_stats))
+
+#endif /* __UAPI_RPP_X1_CONFIG_H */