2.13.2. V4L2_META_FMT_IPU3_PARAMS (‘ip3p’), V4L2_META_FMT_IPU3_3A (‘ip3s’)¶

2.13.2.1. 3A statistics¶

The IPU3 ImgU 3A statistics accelerators collect different statistics over an input Bayer frame. Those statistics are obtained from the “ipu3-imgu [01] 3a stat” metadata capture video nodes, using the v4l2_meta_format interface. They are formatted as described by the ipu3_uapi_stats_3a structure.

The statistics collected are AWB (Auto-white balance) RGBS (Red, Green, Blue and Saturation measure) cells, AWB filter response, AF (Auto-focus) filter response, and AE (Auto-exposure) histogram.

The struct ipu3_uapi_4a_config saves all configurable parameters.

struct ipu3_uapi_stats_3a {
        struct ipu3_uapi_awb_raw_buffer awb_raw_buffer;
        struct ipu3_uapi_ae_raw_buffer_aligned ae_raw_buffer[IPU3_UAPI_MAX_STRIPES];
        struct ipu3_uapi_af_raw_buffer af_raw_buffer;
        struct ipu3_uapi_awb_fr_raw_buffer awb_fr_raw_buffer;
        struct ipu3_uapi_4a_config stats_4a_config;
        __u32 ae_join_buffers;
        __u8 padding[28];
        struct ipu3_uapi_stats_3a_bubble_info_per_stripe stats_3a_bubble_per_stripe;
        struct ipu3_uapi_ff_status stats_3a_status;
};

2.13.2.2. Pipeline parameters¶

The pipeline parameters are passed to the “ipu3-imgu [01] parameters” metadata output video nodes, using the v4l2_meta_format interface. They are formatted as described by the ipu3_uapi_params structure.

Both 3A statistics and pipeline parameters described here are closely tied to the underlying camera sub-system (CSS) APIs. They are usually consumed and produced by dedicated user space libraries that comprise the important tuning tools, thus freeing the developers from being bothered with the low level hardware and algorithm details.

struct ipu3_uapi_params {
        /* Flags which of the settings below are to be applied */
        struct ipu3_uapi_flags use;

        /* Accelerator cluster parameters */
        struct ipu3_uapi_acc_param acc_param;

        /* ISP vector address space parameters */
        struct ipu3_uapi_isp_lin_vmem_params lin_vmem_params;
        struct ipu3_uapi_isp_tnr3_vmem_params tnr3_vmem_params;
        struct ipu3_uapi_isp_xnr3_vmem_params xnr3_vmem_params;

        /* ISP data memory (DMEM) parameters */
        struct ipu3_uapi_isp_tnr3_params tnr3_dmem_params;
        struct ipu3_uapi_isp_xnr3_params xnr3_dmem_params;

        /* Optical black level compensation */
        struct ipu3_uapi_obgrid_param obgrid_param;
};

2.13.2.3. Intel IPU3 ImgU uAPI data types¶

struct ipu3_uapi_grid_config¶: Grid plane config

Definition:

struct ipu3_uapi_grid_config {
    __u8 width;
    __u8 height;
    __u16 block_width_log2:3;
    __u16 block_height_log2:3;
    __u16 height_per_slice:8;
    __u16 x_start;
    __u16 y_start;
    __u16 x_end;
    __u16 y_end;
};

Members

width: Grid horizontal dimensions, in number of grid blocks(cells). For AWB, the range is (16, 80). For AF/AE, the range is (16, 32).
height: Grid vertical dimensions, in number of grid cells. For AWB, the range is (16, 60). For AF/AE, the range is (16, 24).
block_width_log2: Log2 of the width of each cell in pixels. For AWB, the range is [3, 6]. For AF/AE, the range is [3, 7].
block_height_log2: Log2 of the height of each cell in pixels. For AWB, the range is [3, 6]. For AF/AE, the range is [3, 7].
height_per_slice: The number of blocks in vertical axis per slice. Default 2.
x_start: X value of top left corner of Region of Interest(ROI).
y_start: Y value of top left corner of ROI
x_end: X value of bottom right corner of ROI
y_end: Y value of bottom right corner of ROI

Description

Due to the size of total amount of collected data, most statistics create a grid-based output, and the data is then divided into “slices”.

struct ipu3_uapi_awb_set_item¶: Memory layout for each cell in AWB

Definition:

struct ipu3_uapi_awb_set_item {
    __u8 Gr_avg;
    __u8 R_avg;
    __u8 B_avg;
    __u8 Gb_avg;
    __u8 sat_ratio;
    __u8 padding0;
    __u8 padding1;
    __u8 padding2;
};

Members

Gr_avg: Green average for red lines in the cell.
R_avg: Red average in the cell.
B_avg: Blue average in the cell.
Gb_avg: Green average for blue lines in the cell.
sat_ratio: Percentage of pixels over the thresholds specified in ipu3_uapi_awb_config_s, coded from 0 to 255.
padding0: Unused byte for padding.
padding1: Unused byte for padding.
padding2: Unused byte for padding.

struct ipu3_uapi_awb_raw_buffer¶: AWB raw buffer

Definition:

struct ipu3_uapi_awb_raw_buffer {
    struct ipu3_uapi_awb_set_item meta_data[IPU3_UAPI_AWB_MAX_BUFFER_SIZE] ;
};

Members

meta_data: buffer to hold auto white balance meta data which is the average values for each color channel.

struct ipu3_uapi_awb_config_s¶: AWB config

Definition:

struct ipu3_uapi_awb_config_s {
    __u16 rgbs_thr_gr;
    __u16 rgbs_thr_r;
    __u16 rgbs_thr_gb;
    __u16 rgbs_thr_b;
    struct ipu3_uapi_grid_config grid;
};

Members

rgbs_thr_gr: gr threshold value.
rgbs_thr_r: Red threshold value.
rgbs_thr_gb: gb threshold value.
rgbs_thr_b: Blue threshold value.
grid: ipu3_uapi_grid_config, the default grid resolution is 16x16 cells.

Description

The threshold is a saturation measure range [0, 8191], 8191 is default. Values over threshold may be optionally rejected for averaging.

struct ipu3_uapi_awb_config¶: AWB config wrapper

Definition:

struct ipu3_uapi_awb_config {
    struct ipu3_uapi_awb_config_s config ;
};

Members

config: config for auto white balance as defined by ipu3_uapi_awb_config_s

struct ipu3_uapi_ae_raw_buffer¶: AE global weighted histogram

Definition:

struct ipu3_uapi_ae_raw_buffer {
    __u32 vals[IPU3_UAPI_AE_BINS * IPU3_UAPI_AE_COLORS];
};

Members

vals: Sum of IPU3_UAPI_AE_COLORS in cell

Description

Each histogram contains IPU3_UAPI_AE_BINS bins. Each bin has 24 bit unsigned for counting the number of the pixel.

struct ipu3_uapi_ae_raw_buffer_aligned¶: AE raw buffer

Definition:

struct ipu3_uapi_ae_raw_buffer_aligned {
    struct ipu3_uapi_ae_raw_buffer buff ;
};

Members

buff: ipu3_uapi_ae_raw_buffer to hold full frame meta data.

struct ipu3_uapi_ae_grid_config¶: AE weight grid

Definition:

struct ipu3_uapi_ae_grid_config {
    __u8 width;
    __u8 height;
    __u8 block_width_log2:4;
    __u8 block_height_log2:4;
    __u8 reserved0:5;
    __u8 ae_en:1;
    __u8 rst_hist_array:1;
    __u8 done_rst_hist_array:1;
    __u16 x_start;
    __u16 y_start;
    __u16 x_end;
    __u16 y_end;
};

Members

width: Grid horizontal dimensions. Value: [16, 32], default 16.
height: Grid vertical dimensions. Value: [16, 24], default 16.
block_width_log2: Log2 of the width of the grid cell, value: [3, 7].
block_height_log2: Log2 of the height of the grid cell, value: [3, 7]. default is 3 (cell size 8x8), 4 cell per grid.
reserved0: reserved
ae_en: 0: does not write to ipu3_uapi_ae_raw_buffer_aligned array, 1: write normally.
rst_hist_array: write 1 to trigger histogram array reset.
done_rst_hist_array: flag for histogram array reset done.
x_start: X value of top left corner of ROI, default 0.
y_start: Y value of top left corner of ROI, default 0.
x_end: X value of bottom right corner of ROI
y_end: Y value of bottom right corner of ROI

Description

The AE block accumulates 4 global weighted histograms(R, G, B, Y) over a defined ROI within the frame. The contribution of each pixel into the histogram, defined by ipu3_uapi_ae_weight_elem LUT, is indexed by a grid.

struct ipu3_uapi_ae_weight_elem¶: AE weights LUT

Definition:

struct ipu3_uapi_ae_weight_elem {
    __u32 cell0:4;
    __u32 cell1:4;
    __u32 cell2:4;
    __u32 cell3:4;
    __u32 cell4:4;
    __u32 cell5:4;
    __u32 cell6:4;
    __u32 cell7:4;
};

Members

cell0: weighted histogram grid value.
cell1: weighted histogram grid value.
cell2: weighted histogram grid value.
cell3: weighted histogram grid value.
cell4: weighted histogram grid value.
cell5: weighted histogram grid value.
cell6: weighted histogram grid value.
cell7: weighted histogram grid value.

Description

Use weighted grid value to give a different contribution factor to each cell. Precision u4, range [0, 15].

struct ipu3_uapi_ae_ccm¶: AE coefficients for WB and CCM

Definition:

struct ipu3_uapi_ae_ccm {
    __u16 gain_gr;
    __u16 gain_r;
    __u16 gain_b;
    __u16 gain_gb;
    __s16 mat[16];
};

Members

gain_gr: WB gain factor for the gr channels. Default 256.
gain_r: WB gain factor for the r channel. Default 256.
gain_b: WB gain factor for the b channel. Default 256.
gain_gb: WB gain factor for the gb channels. Default 256.
mat: 4x4 matrix that transforms Bayer quad output from WB to RGB+Y.

Description

Default:: 128, 0, 0, 0, 0, 128, 0, 0, 0, 0, 128, 0, 0, 0, 0, 128,

As part of the raw frame pre-process stage, the WB and color conversion need to be applied to expose the impact of these gain operations.

struct ipu3_uapi_ae_config¶: AE config

Definition:

struct ipu3_uapi_ae_config {
    struct ipu3_uapi_ae_grid_config grid_cfg ;
    struct ipu3_uapi_ae_weight_elem weights[IPU3_UAPI_AE_WEIGHTS] ;
    struct ipu3_uapi_ae_ccm ae_ccm ;
};

Members

grid_cfg: config for auto exposure statistics grid. See struct ipu3_uapi_ae_grid_config, as Imgu did not support output auto exposure statistics, so user can ignore this configuration and use the RGB table in auto-whitebalance statistics instead.
weights: IPU3_UAPI_AE_WEIGHTS is based on 32x24 blocks in the grid. Each grid cell has a corresponding value in weights LUT called grid value, global histogram is updated based on grid value and pixel value.
ae_ccm: Color convert matrix pre-processing block.

Description

Calculate AE grid from image resolution, resample ae weights.

struct ipu3_uapi_af_filter_config¶: AF 2D filter for contrast measurements

Definition:

struct ipu3_uapi_af_filter_config {
    struct {
        __u8 a1;
        __u8 a2;
        __u8 a3;
        __u8 a4;
    } y1_coeff_0;
    struct {
        __u8 a5;
        __u8 a6;
        __u8 a7;
        __u8 a8;
    } y1_coeff_1;
    struct {
        __u8 a9;
        __u8 a10;
        __u8 a11;
        __u8 a12;
    } y1_coeff_2;
    __u32 y1_sign_vec;
    struct {
        __u8 a1;
        __u8 a2;
        __u8 a3;
        __u8 a4;
    } y2_coeff_0;
    struct {
        __u8 a5;
        __u8 a6;
        __u8 a7;
        __u8 a8;
    } y2_coeff_1;
    struct {
        __u8 a9;
        __u8 a10;
        __u8 a11;
        __u8 a12;
    } y2_coeff_2;
    __u32 y2_sign_vec;
    struct {
        __u8 y_gen_rate_gr;
        __u8 y_gen_rate_r;
        __u8 y_gen_rate_b;
        __u8 y_gen_rate_gb;
    } y_calc;
    struct {
        __u32 reserved0:8;
        __u32 y1_nf:4;
        __u32 reserved1:4;
        __u32 y2_nf:4;
        __u32 reserved2:12;
    } nf;
};

Members

y1_coeff_0: filter Y1, structure: 3x11, support both symmetry and anti-symmetry type. A12 is center, A1-A11 are neighbours. for analyzing low frequency content, used to calculate sum of gradients in x direction.
y1_coeff_0.a1: filter1 coefficients A1, u8, default 0.
y1_coeff_0.a2: filter1 coefficients A2, u8, default 0.
y1_coeff_0.a3: filter1 coefficients A3, u8, default 0.
y1_coeff_0.a4: filter1 coefficients A4, u8, default 0.
y1_coeff_1: Struct
y1_coeff_1.a5: filter1 coefficients A5, u8, default 0.
y1_coeff_1.a6: filter1 coefficients A6, u8, default 0.
y1_coeff_1.a7: filter1 coefficients A7, u8, default 0.
y1_coeff_1.a8: filter1 coefficients A8, u8, default 0.
y1_coeff_2: Struct
y1_coeff_2.a9: filter1 coefficients A9, u8, default 0.
y1_coeff_2.a10: filter1 coefficients A10, u8, default 0.
y1_coeff_2.a11: filter1 coefficients A11, u8, default 0.
y1_coeff_2.a12: filter1 coefficients A12, u8, default 128.
y1_sign_vec: Each bit corresponds to one coefficient sign bit, 0: positive, 1: negative, default 0.
y2_coeff_0: Y2, same structure as Y1. For analyzing high frequency content.
y2_coeff_0.a1: filter2 coefficients A1, u8, default 0.
y2_coeff_0.a2: filter2 coefficients A2, u8, default 0.
y2_coeff_0.a3: filter2 coefficients A3, u8, default 0.
y2_coeff_0.a4: filter2 coefficients A4, u8, default 0.
y2_coeff_1: Struct
y2_coeff_1.a5: filter2 coefficients A5, u8, default 0.
y2_coeff_1.a6: filter2 coefficients A6, u8, default 0.
y2_coeff_1.a7: filter2 coefficients A7, u8, default 0.
y2_coeff_1.a8: filter2 coefficients A8, u8, default 0.
y2_coeff_2: Struct
y2_coeff_2.a9: filter1 coefficients A9, u8, default 0.
y2_coeff_2.a10: filter1 coefficients A10, u8, default 0.
y2_coeff_2.a11: filter1 coefficients A11, u8, default 0.
y2_coeff_2.a12: filter1 coefficients A12, u8, default 128.
y2_sign_vec: Each bit corresponds to one coefficient sign bit, 0: positive, 1: negative, default 0.
y_calc: Pre-processing that converts Bayer quad to RGB+Y values to be used for building histogram. Range [0, 32], default 8. Rule: y_gen_rate_gr + y_gen_rate_r + y_gen_rate_b + y_gen_rate_gb = 32 A single Y is calculated based on sum of Gr/R/B/Gb based on their contribution ratio.
y_calc.y_gen_rate_gr: Contribution ratio Gr for Y
y_calc.y_gen_rate_r: Contribution ratio R for Y
y_calc.y_gen_rate_b: Contribution ratio B for Y
y_calc.y_gen_rate_gb: Contribution ratio Gb for Y
nf: The shift right value that should be applied during the Y1/Y2 filter to make sure the total memory needed is 2 bytes per grid cell.
nf.reserved0: reserved
nf.y1_nf: Normalization factor for the convolution coeffs of y1, should be log2 of the sum of the abs values of the filter coeffs, default 7 (2^7 = 128).
nf.reserved1: reserved
nf.y2_nf: Normalization factor for y2, should be log2 of the sum of the abs values of the filter coeffs.
nf.reserved2: reserved

struct ipu3_uapi_af_raw_buffer¶: AF meta data

Definition:

struct ipu3_uapi_af_raw_buffer {
    __u8 y_table[IPU3_UAPI_AF_Y_TABLE_MAX_SIZE] ;
};

Members

y_table: Each color component will be convolved separately with filter1 and filter2 and the result will be summed out and averaged for each cell.

struct ipu3_uapi_af_config_s¶: AF config

Definition:

struct ipu3_uapi_af_config_s {
    struct ipu3_uapi_af_filter_config filter_config ;
    __u8 padding[4];
    struct ipu3_uapi_grid_config grid_cfg ;
};

Members

filter_config: AF uses Y1 and Y2 filters as configured in ipu3_uapi_af_filter_config
padding: paddings
grid_cfg: See ipu3_uapi_grid_config, default resolution 16x16. Use large grid size for large image and vice versa.

struct ipu3_uapi_awb_fr_raw_buffer¶: AWB filter response meta data

Definition:

struct ipu3_uapi_awb_fr_raw_buffer {
    __u8 meta_data[IPU3_UAPI_AWB_FR_BAYER_TABLE_MAX_SIZE] ;
};

Members

meta_data: Statistics output on the grid after convolving with 1D filter.

struct ipu3_uapi_awb_fr_config_s¶: AWB filter response config

Definition:

struct ipu3_uapi_awb_fr_config_s {
    struct ipu3_uapi_grid_config grid_cfg;
    __u8 bayer_coeff[6];
    __u16 reserved1;
    __u32 bayer_sign;
    __u8 bayer_nf;
    __u8 reserved2[7];
};

Members

grid_cfg: grid config, default 16x16.
bayer_coeff: 1D Filter 1x11 center symmetry/anti-symmetry. coefficients defaults { 0, 0, 0, 0, 0, 128 }. Applied on whole image for each Bayer channel separately by a weighted sum of its 11x1 neighbors.
reserved1: reserved
bayer_sign: sign of filter coefficients, default 0.
bayer_nf: normalization factor for the convolution coeffs, to make sure total memory needed is within pre-determined range. NF should be the log2 of the sum of the abs values of the filter coeffs, range [7, 14], default 7.
reserved2: reserved

struct ipu3_uapi_4a_config¶: 4A config

Definition:

struct ipu3_uapi_4a_config {
    struct ipu3_uapi_awb_config_s awb_config ;
    struct ipu3_uapi_ae_grid_config ae_grd_config;
    __u8 padding[20];
    struct ipu3_uapi_af_config_s af_config;
    struct ipu3_uapi_awb_fr_config_s awb_fr_config ;
};

Members

awb_config: ipu3_uapi_awb_config_s, default resolution 16x16
ae_grd_config: auto exposure statistics ipu3_uapi_ae_grid_config
padding: paddings
af_config: auto focus config ipu3_uapi_af_config_s
awb_fr_config: ipu3_uapi_awb_fr_config_s, default resolution 16x16

struct ipu3_uapi_bubble_info¶: Bubble info for host side debugging

Definition:

struct ipu3_uapi_bubble_info {
    __u32 num_of_stripes ;
    __u8 padding[28];
    __u32 num_sets;
    __u8 padding1[28];
    __u32 size_of_set;
    __u8 padding2[28];
    __u32 bubble_size;
    __u8 padding3[28];
};

Members

num_of_stripes: A single frame is divided into several parts called stripes due to limitation on line buffer memory. The separation between the stripes is vertical. Each such stripe is processed as a single frame by the ISP pipe.
padding: padding bytes.
num_sets: number of sets.
padding1: padding bytes.
size_of_set: set size.
padding2: padding bytes.
bubble_size: is the amount of padding in the bubble expressed in “sets”.
padding3: padding bytes.

struct ipu3_uapi_ff_status¶: Enable bits for each 3A fixed function

Definition:

struct ipu3_uapi_ff_status {
    __u32 awb_en ;
    __u8 padding[28];
    __u32 ae_en;
    __u8 padding1[28];
    __u32 af_en;
    __u8 padding2[28];
    __u32 awb_fr_en;
    __u8 padding3[28];
};

Members

awb_en: auto white balance enable
padding: padding config
ae_en: auto exposure enable
padding1: padding config
af_en: auto focus enable
padding2: padding config
awb_fr_en: awb filter response enable bit
padding3: padding config

struct ipu3_uapi_stats_3a¶: 3A statistics

Definition:

struct ipu3_uapi_stats_3a {
    struct ipu3_uapi_awb_raw_buffer awb_raw_buffer;
    struct ipu3_uapi_ae_raw_buffer_aligned ae_raw_buffer[IPU3_UAPI_MAX_STRIPES];
    struct ipu3_uapi_af_raw_buffer af_raw_buffer;
    struct ipu3_uapi_awb_fr_raw_buffer awb_fr_raw_buffer;
    struct ipu3_uapi_4a_config stats_4a_config;
    __u32 ae_join_buffers;
    __u8 padding[28];
    struct ipu3_uapi_stats_3a_bubble_info_per_stripe stats_3a_bubble_per_stripe;
    struct ipu3_uapi_ff_status stats_3a_status;
};

Members

awb_raw_buffer: auto white balance meta data ipu3_uapi_awb_raw_buffer
ae_raw_buffer: auto exposure raw data ipu3_uapi_ae_raw_buffer_aligned current Imgu does not output the auto exposure statistics to ae_raw_buffer, the user such as 3A algorithm can use the RGB table in ipu3_uapi_awb_raw_buffer to do auto-exposure.
af_raw_buffer: ipu3_uapi_af_raw_buffer for auto focus meta data
awb_fr_raw_buffer: value as specified by ipu3_uapi_awb_fr_raw_buffer
stats_4a_config: 4a statistics config as defined by ipu3_uapi_4a_config.
ae_join_buffers: 1 to use ae_raw_buffer.
padding: padding config
stats_3a_bubble_per_stripe: a ipu3_uapi_stats_3a_bubble_info_per_stripe
stats_3a_status: 3a statistics status set in ipu3_uapi_ff_status

struct ipu3_uapi_bnr_static_config_wb_gains_config¶: White balance gains

Definition:

struct ipu3_uapi_bnr_static_config_wb_gains_config {
    __u16 gr;
    __u16 r;
    __u16 b;
    __u16 gb;
};

Members

gr: white balance gain for Gr channel.
r: white balance gain for R channel.
b: white balance gain for B channel.
gb: white balance gain for Gb channel.

Description

For BNR parameters WB gain factor for the three channels [Ggr, Ggb, Gb, Gr]. Their precision is U3.13 and the range is (0, 8) and the actual gain is Gx + 1, it is typically Gx = 1.

Pout = {Pin * (1 + Gx)}.

struct ipu3_uapi_bnr_static_config_wb_gains_thr_config¶: Threshold config

Definition:

struct ipu3_uapi_bnr_static_config_wb_gains_thr_config {
    __u8 gr;
    __u8 r;
    __u8 b;
    __u8 gb;
};

Members

gr: white balance threshold gain for Gr channel.
r: white balance threshold gain for R channel.
b: white balance threshold gain for B channel.
gb: white balance threshold gain for Gb channel.

Description

Defines the threshold that specifies how different a defect pixel can be from its neighbors.(used by dynamic defect pixel correction sub block) Precision u4.4 range [0, 8].

struct ipu3_uapi_bnr_static_config_thr_coeffs_config¶: Noise model coefficients that controls noise threshold

Definition:

struct ipu3_uapi_bnr_static_config_thr_coeffs_config {
    __u32 cf:13;
    __u32 reserved0:3;
    __u32 cg:5;
    __u32 ci:5;
    __u32 reserved1:1;
    __u32 r_nf:5;
};

Members

cf: Free coefficient for threshold calculation, range [0, 8191], default 0.
reserved0: reserved
cg: Gain coefficient for threshold calculation, [0, 31], default 8.
ci: Intensity coefficient for threshold calculation. range [0, 0x1f] default 6. format: u3.2 (3 most significant bits represent whole number, 2 least significant bits represent the fractional part with each count representing 0.25) e.g. 6 in binary format is 00110, that translates to 1.5
reserved1: reserved
r_nf: Normalization shift value for r^2 calculation, range [12, 20] where r is a radius of pixel [row, col] from centor of sensor. default 14.

Description

Threshold used to distinguish between noise and details.

struct ipu3_uapi_bnr_static_config_thr_ctrl_shd_config¶: Shading config

Definition:

struct ipu3_uapi_bnr_static_config_thr_ctrl_shd_config {
    __u8 gr;
    __u8 r;
    __u8 b;
    __u8 gb;
};

Members

gr: Coefficient defines lens shading gain approximation for gr channel
r: Coefficient defines lens shading gain approximation for r channel
b: Coefficient defines lens shading gain approximation for b channel
gb: Coefficient defines lens shading gain approximation for gb channel

Description

Parameters for noise model (NM) adaptation of BNR due to shading correction. All above have precision of u3.3, default to 0.

struct ipu3_uapi_bnr_static_config_opt_center_config¶: Optical center config

Definition:

struct ipu3_uapi_bnr_static_config_opt_center_config {
    __s32 x_reset:13;
    __u32 reserved0:3;
    __s32 y_reset:13;
    __u32 reserved2:3;
};

Members

x_reset: Reset value of X (col start - X center). Precision s12.0.
reserved0: reserved
y_reset: Reset value of Y (row start - Y center). Precision s12.0.
reserved2: reserved

Description

Distance from corner to optical center for NM adaptation due to shading correction (should be calculated based on shading tables)

struct ipu3_uapi_bnr_static_config_lut_config¶: BNR square root lookup table

Definition:

struct ipu3_uapi_bnr_static_config_lut_config {
    __u8 values[IPU3_UAPI_BNR_LUT_SIZE];
};

Members

values: pre-calculated values of square root function.

Description

LUT implementation of square root operation.

struct ipu3_uapi_bnr_static_config_bp_ctrl_config¶: Detect bad pixels (bp)

Definition:

struct ipu3_uapi_bnr_static_config_bp_ctrl_config {
    __u32 bp_thr_gain:5;
    __u32 reserved0:2;
    __u32 defect_mode:1;
    __u32 bp_gain:6;
    __u32 reserved1:18;
    __u32 w0_coeff:4;
    __u32 reserved2:4;
    __u32 w1_coeff:4;
    __u32 reserved3:20;
};

Members

bp_thr_gain: Defines the threshold that specifies how different a defect pixel can be from its neighbors. Threshold is dependent on de-noise threshold calculated by algorithm. Range [4, 31], default 4.
reserved0: reserved
defect_mode: Mode of addressed defect pixels, 0 - single defect pixel is expected, 1 - 2 adjacent defect pixels are expected, default 1.
bp_gain: Defines how 2nd derivation that passes through a defect pixel is different from 2nd derivations that pass through neighbor pixels. u4.2, range [0, 256], default 8.
reserved1: reserved
w0_coeff: Blending coefficient of defect pixel correction. Precision u4, range [0, 8], default 8.
reserved2: reserved
w1_coeff: Enable influence of incorrect defect pixel correction to be avoided. Precision u4, range [1, 8], default 8.
reserved3: reserved

struct ipu3_uapi_bnr_static_config_dn_detect_ctrl_config¶: Denoising config

Definition:

struct ipu3_uapi_bnr_static_config_dn_detect_ctrl_config {
    __u32 alpha:4;
    __u32 beta:4;
    __u32 gamma:4;
    __u32 reserved0:4;
    __u32 max_inf:4;
    __u32 reserved1:7;
    __u32 gd_enable:1;
    __u32 bpc_enable:1;
    __u32 bnr_enable:1;
    __u32 ff_enable:1;
    __u32 reserved2:1;
};

Members

alpha: Weight of central element of smoothing filter.
beta: Weight of peripheral elements of smoothing filter, default 4.
gamma: Weight of diagonal elements of smoothing filter, default 4.
reserved0: reserved
max_inf: Maximum increase of peripheral or diagonal element influence relative to the pre-defined value range: [0x5, 0xa]
reserved1: reserved
gd_enable: Green disparity enable control, 0 - disable, 1 - enable.
bpc_enable: Bad pixel correction enable control, 0 - disable, 1 - enable.
bnr_enable: Bayer noise removal enable control, 0 - disable, 1 - enable.
ff_enable: Fixed function enable, 0 - disable, 1 - enable.
reserved2: reserved

Description

beta and gamma parameter define the strength of the noise removal filter.: All above has precision u0.4, range [0, 0xf] format: u0.4 (no / zero bits represent whole number, 4 bits represent the fractional part with each count representing 0.0625) e.g. 0xf translates to 0.0625x15 = 0.9375

struct ipu3_uapi_bnr_static_config_opt_center_sqr_config¶: BNR optical square

Definition:

struct ipu3_uapi_bnr_static_config_opt_center_sqr_config {
    __u32 x_sqr_reset;
    __u32 y_sqr_reset;
};

Members

x_sqr_reset: Reset value of X^2.
y_sqr_reset: Reset value of Y^2.

Description

Please note:

X and Y ref to ipu3_uapi_bnr_static_config_opt_center_config

Both structs are used in threshold formula to calculate r^2, where r is a radius of pixel [row, col] from centor of sensor.

struct ipu3_uapi_bnr_static_config¶: BNR static config

Definition:

struct ipu3_uapi_bnr_static_config {
    struct ipu3_uapi_bnr_static_config_wb_gains_config wb_gains;
    struct ipu3_uapi_bnr_static_config_wb_gains_thr_config wb_gains_thr;
    struct ipu3_uapi_bnr_static_config_thr_coeffs_config thr_coeffs;
    struct ipu3_uapi_bnr_static_config_thr_ctrl_shd_config thr_ctrl_shd;
    struct ipu3_uapi_bnr_static_config_opt_center_config opt_center;
    struct ipu3_uapi_bnr_static_config_lut_config lut;
    struct ipu3_uapi_bnr_static_config_bp_ctrl_config bp_ctrl;
    struct ipu3_uapi_bnr_static_config_dn_detect_ctrl_config dn_detect_ctrl;
    __u32 column_size;
    struct ipu3_uapi_bnr_static_config_opt_center_sqr_config opt_center_sqr;
};

Members

wb_gains: white balance gains ipu3_uapi_bnr_static_config_wb_gains_config
wb_gains_thr: white balance gains threshold as defined by ipu3_uapi_bnr_static_config_wb_gains_thr_config
thr_coeffs: coefficients of threshold ipu3_uapi_bnr_static_config_thr_coeffs_config
thr_ctrl_shd: control of shading threshold ipu3_uapi_bnr_static_config_thr_ctrl_shd_config
opt_center: optical center ipu3_uapi_bnr_static_config_opt_center_config
lut: lookup table ipu3_uapi_bnr_static_config_lut_config
bp_ctrl: detect and remove bad pixels as defined in struct ipu3_uapi_bnr_static_config_bp_ctrl_config
dn_detect_ctrl: detect and remove noise. ipu3_uapi_bnr_static_config_dn_detect_ctrl_config
column_size: The number of pixels in column.
opt_center_sqr: Reset value of r^2 to optical center, see ipu3_uapi_bnr_static_config_opt_center_sqr_config.

Description

Above parameters and opt_center_sqr are used for white balance and shading.

struct ipu3_uapi_bnr_static_config_green_disparity¶: Correct green disparity

Definition:

struct ipu3_uapi_bnr_static_config_green_disparity {
    __u32 gd_red:6;
    __u32 reserved0:2;
    __u32 gd_green:6;
    __u32 reserved1:2;
    __u32 gd_blue:6;
    __u32 reserved2:10;
    __u32 gd_black:14;
    __u32 reserved3:2;
    __u32 gd_shading:7;
    __u32 reserved4:1;
    __u32 gd_support:2;
    __u32 reserved5:1;
    __u32 gd_clip:1;
    __u32 gd_central_weight:4;
};

Members

gd_red: Shading gain coeff for gr disparity level in bright red region. Precision u0.6, default 4(0.0625).
reserved0: reserved
gd_green: Shading gain coeff for gr disparity level in bright green region. Precision u0.6, default 4(0.0625).
reserved1: reserved
gd_blue: Shading gain coeff for gr disparity level in bright blue region. Precision u0.6, default 4(0.0625).
reserved2: reserved
gd_black: Maximal green disparity level in dark region (stronger disparity assumed to be image detail). Precision u14, default 80.
reserved3: reserved
gd_shading: Change maximal green disparity level according to square distance from image center.
reserved4: reserved
gd_support: Lower bound for the number of second green color pixels in current pixel neighborhood with less than threshold difference from it.
reserved5: reserved
gd_clip: Turn green disparity clip on/off, [0, 1], default 1.
gd_central_weight: Central pixel weight in 9 pixels weighted sum.

Description

The shading gain coeff of red, green, blue and black are used to calculate threshold given a pixel’s color value and its coordinates in the image.

struct ipu3_uapi_dm_config¶: De-mosaic parameters

Definition:

struct ipu3_uapi_dm_config {
    __u32 dm_en:1;
    __u32 ch_ar_en:1;
    __u32 fcc_en:1;
    __u32 reserved0:13;
    __u32 frame_width:16;
    __u32 gamma_sc:5;
    __u32 reserved1:3;
    __u32 lc_ctrl:5;
    __u32 reserved2:3;
    __u32 cr_param1:5;
    __u32 reserved3:3;
    __u32 cr_param2:5;
    __u32 reserved4:3;
    __u32 coring_param:5;
    __u32 reserved5:27;
};

Members

dm_en: de-mosaic enable.
ch_ar_en: Checker artifacts removal enable flag. Default 0.
fcc_en: False color correction (FCC) enable flag. Default 0.
reserved0: reserved
frame_width: do not care
gamma_sc: Sharpening coefficient (coefficient of 2-d derivation of complementary color in Hamilton-Adams interpolation). u5, range [0, 31], default 8.
reserved1: reserved
lc_ctrl: Parameter that controls weights of Chroma Homogeneity metric in calculation of final homogeneity metric. u5, range [0, 31], default 7.
reserved2: reserved
cr_param1: First parameter that defines Checker artifact removal feature gain. Precision u5, range [0, 31], default 8.
reserved3: reserved
cr_param2: Second parameter that defines Checker artifact removal feature gain. Precision u5, range [0, 31], default 8.
reserved4: reserved
coring_param: Defines power of false color correction operation. low for preserving edge colors, high for preserving gray edge artifacts. Precision u1.4, range [0, 1.9375], default 4 (0.25).
reserved5: reserved

Description

The demosaic fixed function block is responsible to covert Bayer(mosaiced) images into color images based on demosaicing algorithm.

struct ipu3_uapi_ccm_mat_config¶: Color correction matrix

Definition:

struct ipu3_uapi_ccm_mat_config {
    __s16 coeff_m11;
    __s16 coeff_m12;
    __s16 coeff_m13;
    __s16 coeff_o_r;
    __s16 coeff_m21;
    __s16 coeff_m22;
    __s16 coeff_m23;
    __s16 coeff_o_g;
    __s16 coeff_m31;
    __s16 coeff_m32;
    __s16 coeff_m33;
    __s16 coeff_o_b;
};

Members

coeff_m11: CCM 3x3 coefficient, range [-65536, 65535]
coeff_m12: CCM 3x3 coefficient, range [-8192, 8191]
coeff_m13: CCM 3x3 coefficient, range [-32768, 32767]
coeff_o_r: Bias 3x1 coefficient, range [-8191, 8181]
coeff_m21: CCM 3x3 coefficient, range [-32767, 32767]
coeff_m22: CCM 3x3 coefficient, range [-8192, 8191]
coeff_m23: CCM 3x3 coefficient, range [-32768, 32767]
coeff_o_g: Bias 3x1 coefficient, range [-8191, 8181]
coeff_m31: CCM 3x3 coefficient, range [-32768, 32767]
coeff_m32: CCM 3x3 coefficient, range [-8192, 8191]
coeff_m33: CCM 3x3 coefficient, range [-32768, 32767]
coeff_o_b: Bias 3x1 coefficient, range [-8191, 8181]

Description

Transform sensor specific color space to standard sRGB by applying 3x3 matrix and adding a bias vector O. The transformation is basically a rotation and translation in the 3-dimensional color spaces. Here are the defaults:

9775, -2671, 1087, 0 -1071, 8303, 815, 0 -23, -7887, 16103, 0

struct ipu3_uapi_gamma_corr_ctrl¶: Gamma correction

Definition:

struct ipu3_uapi_gamma_corr_ctrl {
    __u32 enable:1;
    __u32 reserved:31;
};

Members

enable: gamma correction enable.
reserved: reserved

struct ipu3_uapi_gamma_corr_lut¶: Per-pixel tone mapping implemented as LUT.

Definition:

struct ipu3_uapi_gamma_corr_lut {
    __u16 lut[IPU3_UAPI_GAMMA_CORR_LUT_ENTRIES];
};

Members

lut: 256 tabulated values of the gamma function. LUT[1].. LUT[256] format u13.0, range [0, 8191].

Description

The tone mapping operation is done by a Piece wise linear graph that is implemented as a lookup table(LUT). The pixel component input intensity is the X-axis of the graph which is the table entry.

struct ipu3_uapi_gamma_config¶: Gamma config

Definition:

struct ipu3_uapi_gamma_config {
    struct ipu3_uapi_gamma_corr_ctrl gc_ctrl ;
    struct ipu3_uapi_gamma_corr_lut gc_lut ;
};

Members

gc_ctrl: control of gamma correction ipu3_uapi_gamma_corr_ctrl
gc_lut: lookup table of gamma correction ipu3_uapi_gamma_corr_lut

struct ipu3_uapi_csc_mat_config¶: Color space conversion matrix config

Definition:

struct ipu3_uapi_csc_mat_config {
    __s16 coeff_c11;
    __s16 coeff_c12;
    __s16 coeff_c13;
    __s16 coeff_b1;
    __s16 coeff_c21;
    __s16 coeff_c22;
    __s16 coeff_c23;
    __s16 coeff_b2;
    __s16 coeff_c31;
    __s16 coeff_c32;
    __s16 coeff_c33;
    __s16 coeff_b3;
};

Members

coeff_c11: Conversion matrix value, format s0.14, range [-16384, 16383].
coeff_c12: Conversion matrix value, format s0.14, range [-8192, 8191].
coeff_c13: Conversion matrix value, format s0.14, range [-16384, 16383].
coeff_b1: Bias 3x1 coefficient, s13.0 range [-8192, 8191].
coeff_c21: Conversion matrix value, format s0.14, range [-16384, 16383].
coeff_c22: Conversion matrix value, format s0.14, range [-8192, 8191].
coeff_c23: Conversion matrix value, format s0.14, range [-16384, 16383].
coeff_b2: Bias 3x1 coefficient, s13.0 range [-8192, 8191].
coeff_c31: Conversion matrix value, format s0.14, range [-16384, 16383].
coeff_c32: Conversion matrix value, format s0.14, range [-8192, 8191].
coeff_c33: Conversion matrix value, format s0.14, range [-16384, 16383].
coeff_b3: Bias 3x1 coefficient, s13.0 range [-8192, 8191].

Description

To transform each pixel from RGB to YUV (Y - brightness/luminance, UV -chroma) by applying the pixel’s values by a 3x3 matrix and adding an optional bias 3x1 vector. Here are the default values for the matrix:

4898, 9617, 1867, 0, -2410, -4732, 7143, 0, 10076, -8437, -1638, 0,

(i.e. for real number 0.299, 0.299 * 2^14 becomes 4898.)

struct ipu3_uapi_cds_params¶: Chroma down-scaling

Definition:

struct ipu3_uapi_cds_params {
    __u32 ds_c00:2;
    __u32 ds_c01:2;
    __u32 ds_c02:2;
    __u32 ds_c03:2;
    __u32 ds_c10:2;
    __u32 ds_c11:2;
    __u32 ds_c12:2;
    __u32 ds_c13:2;
    __u32 ds_nf:5;
    __u32 reserved0:3;
    __u32 csc_en:1;
    __u32 uv_bin_output:1;
    __u32 reserved1:6;
};

Members

ds_c00: range [0, 3]
ds_c01: range [0, 3]
ds_c02: range [0, 3]
ds_c03: range [0, 3]
ds_c10: range [0, 3]
ds_c11: range [0, 3]
ds_c12: range [0, 3]
ds_c13: range [0, 3]
ds_nf: Normalization factor for Chroma output downscaling filter, range 0,4, default 2.
reserved0: reserved
csc_en: Color space conversion enable
uv_bin_output: 0: output YUV 4.2.0, 1: output YUV 4.2.2(default).
reserved1: reserved

Description

In case user does not provide, above 4x2 filter will use following defaults:: 1, 3, 3, 1, 1, 3, 3, 1,

struct ipu3_uapi_shd_grid_config¶: Bayer shading(darkening) correction

Definition:

struct ipu3_uapi_shd_grid_config {
    __u8 width;
    __u8 height;
    __u8 block_width_log2:3;
    __u8 reserved0:1;
    __u8 block_height_log2:3;
    __u8 reserved1:1;
    __u8 grid_height_per_slice;
    __s16 x_start;
    __s16 y_start;
};

Members

width: Grid horizontal dimensions, u8, [8, 128], default 73
height: Grid vertical dimensions, u8, [8, 128], default 56
block_width_log2: Log2 of the width of the grid cell in pixel count u4, [0, 15], default value 5.
reserved0: reserved
block_height_log2: Log2 of the height of the grid cell in pixel count u4, [0, 15], default value 6.
reserved1: reserved
grid_height_per_slice: SHD_MAX_CELLS_PER_SET/width. (with SHD_MAX_CELLS_PER_SET = 146).
x_start: X value of top left corner of sensor relative to ROI s13, [-4096, 0], default 0, only negative values.
y_start: Y value of top left corner of sensor relative to ROI s13, [-4096, 0], default 0, only negative values.

struct ipu3_uapi_shd_general_config¶: Shading general config

Definition:

struct ipu3_uapi_shd_general_config {
    __u32 init_set_vrt_offst_ul:8;
    __u32 shd_enable:1;
    __u32 gain_factor:2;
    __u32 reserved:21;
};

Members

init_set_vrt_offst_ul: set vertical offset, y_start >> block_height_log2 % grid_height_per_slice.
shd_enable: shading enable.
gain_factor: Gain factor. Shift calculated anti shading value. Precision u2. 0x0 - gain factor [1, 5], means no shift interpolated value. 0x1 - gain factor [1, 9], means shift interpolated by 1. 0x2 - gain factor [1, 17], means shift interpolated by 2.
reserved: reserved

Description

Correction is performed by multiplying a gain factor for each of the 4 Bayer channels as a function of the pixel location in the sensor.

struct ipu3_uapi_shd_black_level_config¶: Black level correction

Definition:

struct ipu3_uapi_shd_black_level_config {
    __s16 bl_r;
    __s16 bl_gr;
    __s16 bl_gb;
    __s16 bl_b;
};

Members

bl_r: Bios values for green red. s11 range [-2048, 2047].
bl_gr: Bios values for green blue. s11 range [-2048, 2047].
bl_gb: Bios values for red. s11 range [-2048, 2047].
bl_b: Bios values for blue. s11 range [-2048, 2047].

struct ipu3_uapi_shd_config_static¶: Shading config static

Definition:

struct ipu3_uapi_shd_config_static {
    struct ipu3_uapi_shd_grid_config grid;
    struct ipu3_uapi_shd_general_config general;
    struct ipu3_uapi_shd_black_level_config black_level;
};

Members

grid: shading grid config ipu3_uapi_shd_grid_config
general: shading general config ipu3_uapi_shd_general_config
black_level: black level config for shading correction as defined by ipu3_uapi_shd_black_level_config

struct ipu3_uapi_shd_lut¶: Shading gain factor lookup table.

Definition:

struct ipu3_uapi_shd_lut {
    struct {
        struct {
            __u16 r;
            __u16 gr;
        } r_and_gr[IPU3_UAPI_SHD_MAX_CELLS_PER_SET];
        __u8 reserved1[24];
        struct {
            __u16 gb;
            __u16 b;
        } gb_and_b[IPU3_UAPI_SHD_MAX_CELLS_PER_SET];
        __u8 reserved2[24];
    } sets[IPU3_UAPI_SHD_MAX_CFG_SETS];
};

Members

sets: array
sets.r_and_gr: Red and GreenR Lookup table.
sets.r_and_gr.r: Red shading factor.
sets.r_and_gr.gr: GreenR shading factor.
sets.reserved1: reserved
sets.gb_and_b: GreenB and Blue Lookup table.
sets.gb_and_b.gb: GreenB shading factor.
sets.gb_and_b.b: Blue shading factor.
sets.reserved2: reserved

Description

Map to shading correction LUT register set.

struct ipu3_uapi_shd_config¶: Shading config

Definition:

struct ipu3_uapi_shd_config {
    struct ipu3_uapi_shd_config_static shd ;
    struct ipu3_uapi_shd_lut shd_lut ;
};

Members

shd: shading static config, see ipu3_uapi_shd_config_static
shd_lut: shading lookup table ipu3_uapi_shd_lut

struct ipu3_uapi_iefd_cux2¶: IEFd Config Unit 2 parameters

Definition:

struct ipu3_uapi_iefd_cux2 {
    __u32 x0:9;
    __u32 x1:9;
    __u32 a01:9;
    __u32 b01:5;
};

Members

x0: X0 point of Config Unit, u9.0, default 0.
x1: X1 point of Config Unit, u9.0, default 0.
a01: Slope A of Config Unit, s4.4, default 0.
b01: Slope B, always 0.

Description

Calculate weight for blending directed and non-directed denoise elements

All CU inputs are unsigned, they will be converted to signed when written to register, i.e. a01 will be written to 9 bit register in s4.4 format. The data precision s4.4 means 4 bits for integer parts and 4 bits for the fractional part, the first bit indicates positive or negative value. For userspace software (commonly the imaging library), the computation for the CU slope values should be based on the slope resolution 1/16 (binary 0.0001 - the minimal interval value), the slope value range is [-256, +255]. This applies to ipu3_uapi_iefd_cux6_ed, ipu3_uapi_iefd_cux2_1, ipu3_uapi_iefd_cux2_1, ipu3_uapi_iefd_cux4 and ipu3_uapi_iefd_cux6_rad.

Note

Each instance of Config Unit needs X coordinate of n points and slope A factor between points calculated by driver based on calibration parameters.

struct ipu3_uapi_iefd_cux6_ed¶: Calculate power of non-directed sharpening element, Config Unit 6 for edge detail (ED).

Definition:

struct ipu3_uapi_iefd_cux6_ed {
    __u32 x0:9;
    __u32 x1:9;
    __u32 x2:9;
    __u32 reserved0:5;
    __u32 x3:9;
    __u32 x4:9;
    __u32 x5:9;
    __u32 reserved1:5;
    __u32 a01:9;
    __u32 a12:9;
    __u32 a23:9;
    __u32 reserved2:5;
    __u32 a34:9;
    __u32 a45:9;
    __u32 reserved3:14;
    __u32 b01:9;
    __u32 b12:9;
    __u32 b23:9;
    __u32 reserved4:5;
    __u32 b34:9;
    __u32 b45:9;
    __u32 reserved5:14;
};

Members

x0: X coordinate of point 0, u9.0, default 0.
x1: X coordinate of point 1, u9.0, default 0.
x2: X coordinate of point 2, u9.0, default 0.
reserved0: reserved
x3: X coordinate of point 3, u9.0, default 0.
x4: X coordinate of point 4, u9.0, default 0.
x5: X coordinate of point 5, u9.0, default 0.
reserved1: reserved
a01: slope A points 01, s4.4, default 0.
a12: slope A points 12, s4.4, default 0.
a23: slope A points 23, s4.4, default 0.
reserved2: reserved
a34: slope A points 34, s4.4, default 0.
a45: slope A points 45, s4.4, default 0.
reserved3: reserved
b01: slope B points 01, s4.4, default 0.
b12: slope B points 12, s4.4, default 0.
b23: slope B points 23, s4.4, default 0.
reserved4: reserved
b34: slope B points 34, s4.4, default 0.
b45: slope B points 45, s4.4, default 0.
reserved5: reserved.

struct ipu3_uapi_iefd_cux2_1¶: Calculate power of non-directed denoise element apply.

Definition:

struct ipu3_uapi_iefd_cux2_1 {
    __u32 x0:9;
    __u32 x1:9;
    __u32 a01:9;
    __u32 reserved1:5;
    __u32 b01:8;
    __u32 reserved2:24;
};

Members

x0: X0 point of Config Unit, u9.0, default 0.
x1: X1 point of Config Unit, u9.0, default 0.
a01: Slope A of Config Unit, s4.4, default 0.
reserved1: reserved
b01: offset B0 of Config Unit, u7.0, default 0.
reserved2: reserved

struct ipu3_uapi_iefd_cux4¶: Calculate power of non-directed sharpening element.

Definition:

struct ipu3_uapi_iefd_cux4 {
    __u32 x0:9;
    __u32 x1:9;
    __u32 x2:9;
    __u32 reserved0:5;
    __u32 x3:9;
    __u32 a01:9;
    __u32 a12:9;
    __u32 reserved1:5;
    __u32 a23:9;
    __u32 b01:8;
    __u32 b12:8;
    __u32 reserved2:7;
    __u32 b23:8;
    __u32 reserved3:24;
};

Members

x0: X0 point of Config Unit, u9.0, default 0.
x1: X1 point of Config Unit, u9.0, default 0.
x2: X2 point of Config Unit, u9.0, default 0.
reserved0: reserved
x3: X3 point of Config Unit, u9.0, default 0.
a01: Slope A0 of Config Unit, s4.4, default 0.
a12: Slope A1 of Config Unit, s4.4, default 0.
reserved1: reserved
a23: Slope A2 of Config Unit, s4.4, default 0.
b01: Offset B0 of Config Unit, s7.0, default 0.
b12: Offset B1 of Config Unit, s7.0, default 0.
reserved2: reserved
b23: Offset B2 of Config Unit, s7.0, default 0.
reserved3: reserved

struct ipu3_uapi_iefd_cux6_rad¶: Radial Config Unit (CU)

Definition:

struct ipu3_uapi_iefd_cux6_rad {
    __u32 x0:8;
    __u32 x1:8;
    __u32 x2:8;
    __u32 x3:8;
    __u32 x4:8;
    __u32 x5:8;
    __u32 reserved1:16;
    __u32 a01:16;
    __u32 a12:16;
    __u32 a23:16;
    __u32 a34:16;
    __u32 a45:16;
    __u32 reserved2:16;
    __u32 b01:10;
    __u32 b12:10;
    __u32 b23:10;
    __u32 reserved4:2;
    __u32 b34:10;
    __u32 b45:10;
    __u32 reserved5:12;
};

Members

x0: x0 points of Config Unit radial, u8.0
x1: x1 points of Config Unit radial, u8.0
x2: x2 points of Config Unit radial, u8.0
x3: x3 points of Config Unit radial, u8.0
x4: x4 points of Config Unit radial, u8.0
x5: x5 points of Config Unit radial, u8.0
reserved1: reserved
a01: Slope A of Config Unit radial, s7.8
a12: Slope A of Config Unit radial, s7.8
a23: Slope A of Config Unit radial, s7.8
a34: Slope A of Config Unit radial, s7.8
a45: Slope A of Config Unit radial, s7.8
reserved2: reserved
b01: Slope B of Config Unit radial, s9.0
b12: Slope B of Config Unit radial, s9.0
b23: Slope B of Config Unit radial, s9.0
reserved4: reserved
b34: Slope B of Config Unit radial, s9.0
b45: Slope B of Config Unit radial, s9.0
reserved5: reserved

struct ipu3_uapi_yuvp1_iefd_cfg_units¶: IEFd Config Units parameters

Definition:

struct ipu3_uapi_yuvp1_iefd_cfg_units {
    struct ipu3_uapi_iefd_cux2 cu_1;
    struct ipu3_uapi_iefd_cux6_ed cu_ed;
    struct ipu3_uapi_iefd_cux2 cu_3;
    struct ipu3_uapi_iefd_cux2_1 cu_5;
    struct ipu3_uapi_iefd_cux4 cu_6;
    struct ipu3_uapi_iefd_cux2 cu_7;
    struct ipu3_uapi_iefd_cux4 cu_unsharp;
    struct ipu3_uapi_iefd_cux6_rad cu_radial;
    struct ipu3_uapi_iefd_cux2 cu_vssnlm;
};

Members

cu_1: calculate weight for blending directed and non-directed denoise elements. See ipu3_uapi_iefd_cux2
cu_ed: calculate power of non-directed sharpening element, see ipu3_uapi_iefd_cux6_ed
cu_3: calculate weight for blending directed and non-directed denoise elements. A ipu3_uapi_iefd_cux2
cu_5: calculate power of non-directed denoise element apply, use ipu3_uapi_iefd_cux2_1
cu_6: calculate power of non-directed sharpening element. See ipu3_uapi_iefd_cux4
cu_7: calculate weight for blending directed and non-directed denoise elements. Use ipu3_uapi_iefd_cux2
cu_unsharp: Config Unit of unsharp ipu3_uapi_iefd_cux4
cu_radial: Config Unit of radial ipu3_uapi_iefd_cux6_rad
cu_vssnlm: Config Unit of vssnlm ipu3_uapi_iefd_cux2

struct ipu3_uapi_yuvp1_iefd_config_s¶: IEFd config

Definition:

struct ipu3_uapi_yuvp1_iefd_config_s {
    __u32 horver_diag_coeff:7;
    __u32 reserved0:1;
    __u32 clamp_stitch:6;
    __u32 reserved1:2;
    __u32 direct_metric_update:5;
    __u32 reserved2:3;
    __u32 ed_horver_diag_coeff:7;
    __u32 reserved3:1;
};

Members

horver_diag_coeff: Gradient compensation. Compared with vertical / horizontal (0 / 90 degree), coefficient of diagonal (45 / 135 degree) direction should be corrected by approx. 1/sqrt(2).
reserved0: reserved
clamp_stitch: Slope to stitch between clamped and unclamped edge values
reserved1: reserved
direct_metric_update: Update coeff for direction metric
reserved2: reserved
ed_horver_diag_coeff: Radial Coefficient that compensates for different distance for vertical/horizontal and diagonal gradient calculation (approx. 1/sqrt(2))
reserved3: reserved

struct ipu3_uapi_yuvp1_iefd_control¶: IEFd control

Definition:

struct ipu3_uapi_yuvp1_iefd_control {
    __u32 iefd_en:1;
    __u32 denoise_en:1;
    __u32 direct_smooth_en:1;
    __u32 rad_en:1;
    __u32 vssnlm_en:1;
    __u32 reserved:27;
};

Members

iefd_en: Enable IEFd
denoise_en: Enable denoise
direct_smooth_en: Enable directional smooth
rad_en: Enable radial update
vssnlm_en: Enable VSSNLM output filter
reserved: reserved

struct ipu3_uapi_sharp_cfg¶: Sharpening config

Definition:

struct ipu3_uapi_sharp_cfg {
    __u32 nega_lmt_txt:13;
    __u32 reserved0:19;
    __u32 posi_lmt_txt:13;
    __u32 reserved1:19;
    __u32 nega_lmt_dir:13;
    __u32 reserved2:19;
    __u32 posi_lmt_dir:13;
    __u32 reserved3:19;
};

Members

nega_lmt_txt: Sharpening limit for negative overshoots for texture.
reserved0: reserved
posi_lmt_txt: Sharpening limit for positive overshoots for texture.
reserved1: reserved
nega_lmt_dir: Sharpening limit for negative overshoots for direction (edge).
reserved2: reserved
posi_lmt_dir: Sharpening limit for positive overshoots for direction (edge).
reserved3: reserved

Description

Fixed point type u13.0, range [0, 8191].

struct ipu3_uapi_far_w¶: Sharpening config for far sub-group

Definition:

struct ipu3_uapi_far_w {
    __u32 dir_shrp:7;
    __u32 reserved0:1;
    __u32 dir_dns:7;
    __u32 reserved1:1;
    __u32 ndir_dns_powr:7;
    __u32 reserved2:9;
};

Members

dir_shrp: Weight of wide direct sharpening, u1.6, range [0, 64], default 64.
reserved0: reserved
dir_dns: Weight of wide direct denoising, u1.6, range [0, 64], default 0.
reserved1: reserved
ndir_dns_powr: Power of non-direct denoising, Precision u1.6, range [0, 64], default 64.
reserved2: reserved

struct ipu3_uapi_unsharp_cfg¶: Unsharp config

Definition:

struct ipu3_uapi_unsharp_cfg {
    __u32 unsharp_weight:7;
    __u32 reserved0:1;
    __u32 unsharp_amount:9;
    __u32 reserved1:15;
};

Members

unsharp_weight: Unsharp mask blending weight. u1.6, range [0, 64], default 16. 0 - disabled, 64 - use only unsharp.
reserved0: reserved
unsharp_amount: Unsharp mask amount, u4.5, range [0, 511], default 0.
reserved1: reserved

struct ipu3_uapi_yuvp1_iefd_shrp_cfg¶: IEFd sharpness config

Definition:

struct ipu3_uapi_yuvp1_iefd_shrp_cfg {
    struct ipu3_uapi_sharp_cfg cfg;
    struct ipu3_uapi_far_w far_w;
    struct ipu3_uapi_unsharp_cfg unshrp_cfg;
};

Members

cfg: sharpness config ipu3_uapi_sharp_cfg
far_w: wide range config, value as specified by ipu3_uapi_far_w: The 5x5 environment is separated into 2 sub-groups, the 3x3 nearest neighbors (8 pixels called Near), and the second order neighborhood around them (16 pixels called Far).
unshrp_cfg: unsharpness config. ipu3_uapi_unsharp_cfg

struct ipu3_uapi_unsharp_coef0¶: Unsharp mask coefficients

Definition:

struct ipu3_uapi_unsharp_coef0 {
    __u32 c00:9;
    __u32 c01:9;
    __u32 c02:9;
    __u32 reserved:5;
};

Members

c00: Coeff11, s0.8, range [-255, 255], default 1.
c01: Coeff12, s0.8, range [-255, 255], default 5.
c02: Coeff13, s0.8, range [-255, 255], default 9.
reserved: reserved

Description

Configurable registers for common sharpening support.

struct ipu3_uapi_unsharp_coef1¶: Unsharp mask coefficients

Definition:

struct ipu3_uapi_unsharp_coef1 {
    __u32 c11:9;
    __u32 c12:9;
    __u32 c22:9;
    __u32 reserved:5;
};

Members

c11: Coeff22, s0.8, range [-255, 255], default 29.
c12: Coeff23, s0.8, range [-255, 255], default 55.
c22: Coeff33, s0.8, range [-255, 255], default 96.
reserved: reserved

struct ipu3_uapi_yuvp1_iefd_unshrp_cfg¶: Unsharp mask config

Definition:

struct ipu3_uapi_yuvp1_iefd_unshrp_cfg {
    struct ipu3_uapi_unsharp_coef0 unsharp_coef0;
    struct ipu3_uapi_unsharp_coef1 unsharp_coef1;
};

Members

unsharp_coef0: unsharp coefficient 0 config. See ipu3_uapi_unsharp_coef0
unsharp_coef1: unsharp coefficient 1 config. See ipu3_uapi_unsharp_coef1

struct ipu3_uapi_radial_reset_xy¶: Radial coordinate reset

Definition:

struct ipu3_uapi_radial_reset_xy {
    __s32 x:13;
    __u32 reserved0:3;
    __s32 y:13;
    __u32 reserved1:3;
};

Members

x: Radial reset of x coordinate. Precision s12, [-4095, 4095], default 0.
reserved0: reserved
y: Radial center y coordinate. Precision s12, [-4095, 4095], default 0.
reserved1: reserved

struct ipu3_uapi_radial_reset_x2¶: Radial X^2 reset

Definition:

struct ipu3_uapi_radial_reset_x2 {
    __u32 x2:24;
    __u32 reserved:8;
};

Members

x2: Radial reset of x^2 coordinate. Precision u24, default 0.
reserved: reserved

struct ipu3_uapi_radial_reset_y2¶: Radial Y^2 reset

Definition:

struct ipu3_uapi_radial_reset_y2 {
    __u32 y2:24;
    __u32 reserved:8;
};

Members

y2: Radial reset of y^2 coordinate. Precision u24, default 0.
reserved: reserved

struct ipu3_uapi_radial_cfg¶: Radial config

Definition:

struct ipu3_uapi_radial_cfg {
    __u32 rad_nf:4;
    __u32 reserved0:4;
    __u32 rad_inv_r2:7;
    __u32 reserved1:17;
};

Members

rad_nf: Radial. R^2 normalization factor is scale down by 2^ - (15 + scale)
reserved0: reserved
rad_inv_r2: Radial R^-2 normelized to (0.5..1). Precision u7, range [0, 127].
reserved1: reserved

struct ipu3_uapi_rad_far_w¶: Radial FAR sub-group

Definition:

struct ipu3_uapi_rad_far_w {
    __u32 rad_dir_far_sharp_w:8;
    __u32 rad_dir_far_dns_w:8;
    __u32 rad_ndir_far_dns_power:8;
    __u32 reserved:8;
};

Members

rad_dir_far_sharp_w: Weight of wide direct sharpening, u1.6, range [0, 64], default 64.
rad_dir_far_dns_w: Weight of wide direct denoising, u1.6, range [0, 64], default 0.
rad_ndir_far_dns_power: power of non-direct sharpening, u1.6, range [0, 64], default 0.
reserved: reserved

struct ipu3_uapi_cu_cfg0¶: Radius Config Unit cfg0 register

Definition:

struct ipu3_uapi_cu_cfg0 {
    __u32 cu6_pow:7;
    __u32 reserved0:1;
    __u32 cu_unsharp_pow:7;
    __u32 reserved1:1;
    __u32 rad_cu6_pow:7;
    __u32 reserved2:1;
    __u32 rad_cu_unsharp_pow:6;
    __u32 reserved3:2;
};

Members

cu6_pow: Power of CU6. Power of non-direct sharpening, u3.4.
reserved0: reserved
cu_unsharp_pow: Power of unsharp mask, u2.4.
reserved1: reserved
rad_cu6_pow: Radial/corner CU6. Directed sharpening power, u3.4.
reserved2: reserved
rad_cu_unsharp_pow: Radial power of unsharp mask, u2.4.
reserved3: reserved

struct ipu3_uapi_cu_cfg1¶: Radius Config Unit cfg1 register

Definition:

struct ipu3_uapi_cu_cfg1 {
    __u32 rad_cu6_x1:9;
    __u32 reserved0:1;
    __u32 rad_cu_unsharp_x1:9;
    __u32 reserved1:13;
};

Members

rad_cu6_x1: X1 point of Config Unit 6, precision u9.0.
reserved0: reserved
rad_cu_unsharp_x1: X1 point for Config Unit unsharp for radial/corner point precision u9.0.
reserved1: reserved

struct ipu3_uapi_yuvp1_iefd_rad_cfg¶: IEFd parameters changed radially over the picture plane.

Definition:

struct ipu3_uapi_yuvp1_iefd_rad_cfg {
    struct ipu3_uapi_radial_reset_xy reset_xy;
    struct ipu3_uapi_radial_reset_x2 reset_x2;
    struct ipu3_uapi_radial_reset_y2 reset_y2;
    struct ipu3_uapi_radial_cfg cfg;
    struct ipu3_uapi_rad_far_w rad_far_w;
    struct ipu3_uapi_cu_cfg0 cu_cfg0;
    struct ipu3_uapi_cu_cfg1 cu_cfg1;
};

Members

reset_xy: reset xy value in radial calculation. ipu3_uapi_radial_reset_xy
reset_x2: reset x square value in radial calculation. See struct ipu3_uapi_radial_reset_x2
reset_y2: reset y square value in radial calculation. See struct ipu3_uapi_radial_reset_y2
cfg: radial config defined in ipu3_uapi_radial_cfg
rad_far_w: weight for wide range radial. ipu3_uapi_rad_far_w
cu_cfg0: configuration unit 0. See ipu3_uapi_cu_cfg0
cu_cfg1: configuration unit 1. See ipu3_uapi_cu_cfg1

struct ipu3_uapi_vss_lut_x¶: Vssnlm LUT x0/x1/x2

Definition:

struct ipu3_uapi_vss_lut_x {
    __u32 vs_x0:8;
    __u32 vs_x1:8;
    __u32 vs_x2:8;
    __u32 reserved2:8;
};

Members

vs_x0: Vssnlm LUT x0, precision u8, range [0, 255], default 16.
vs_x1: Vssnlm LUT x1, precision u8, range [0, 255], default 32.
vs_x2: Vssnlm LUT x2, precision u8, range [0, 255], default 64.
reserved2: reserved

struct ipu3_uapi_vss_lut_y¶: Vssnlm LUT y0/y1/y2

Definition:

struct ipu3_uapi_vss_lut_y {
    __u32 vs_y1:4;
    __u32 reserved0:4;
    __u32 vs_y2:4;
    __u32 reserved1:4;
    __u32 vs_y3:4;
    __u32 reserved2:12;
};

Members

vs_y1: Vssnlm LUT y1, precision u4, range [0, 8], default 1.
reserved0: reserved
vs_y2: Vssnlm LUT y2, precision u4, range [0, 8], default 3.
reserved1: reserved
vs_y3: Vssnlm LUT y3, precision u4, range [0, 8], default 8.
reserved2: reserved

struct ipu3_uapi_yuvp1_iefd_vssnlm_cfg¶: IEFd Vssnlm Lookup table

Definition:

struct ipu3_uapi_yuvp1_iefd_vssnlm_cfg {
    struct ipu3_uapi_vss_lut_x vss_lut_x;
    struct ipu3_uapi_vss_lut_y vss_lut_y;
};

Members

vss_lut_x: vss lookup table. See ipu3_uapi_vss_lut_x description
vss_lut_y: vss lookup table. See ipu3_uapi_vss_lut_y description

struct ipu3_uapi_yuvp1_iefd_config¶: IEFd config

Definition:

struct ipu3_uapi_yuvp1_iefd_config {
    struct ipu3_uapi_yuvp1_iefd_cfg_units units;
    struct ipu3_uapi_yuvp1_iefd_config_s config;
    struct ipu3_uapi_yuvp1_iefd_control control;
    struct ipu3_uapi_yuvp1_iefd_shrp_cfg sharp;
    struct ipu3_uapi_yuvp1_iefd_unshrp_cfg unsharp;
    struct ipu3_uapi_yuvp1_iefd_rad_cfg rad;
    struct ipu3_uapi_yuvp1_iefd_vssnlm_cfg vsslnm;
};

Members

units: configuration unit setting, ipu3_uapi_yuvp1_iefd_cfg_units
config: configuration, as defined by ipu3_uapi_yuvp1_iefd_config_s
control: control setting, as defined by ipu3_uapi_yuvp1_iefd_control
sharp: sharpness setting, as defined by ipu3_uapi_yuvp1_iefd_shrp_cfg
unsharp: unsharpness setting, as defined by ipu3_uapi_yuvp1_iefd_unshrp_cfg
rad: radial setting, as defined by ipu3_uapi_yuvp1_iefd_rad_cfg
vsslnm: vsslnm setting, as defined by ipu3_uapi_yuvp1_iefd_vssnlm_cfg

struct ipu3_uapi_yuvp1_yds_config¶: Y Down-Sampling config

Definition:

struct ipu3_uapi_yuvp1_yds_config {
    __u32 c00:2;
    __u32 c01:2;
    __u32 c02:2;
    __u32 c03:2;
    __u32 c10:2;
    __u32 c11:2;
    __u32 c12:2;
    __u32 c13:2;
    __u32 norm_factor:5;
    __u32 reserved0:4;
    __u32 bin_output:1;
    __u32 reserved1:6;
};

Members

c00: range [0, 3], default 0x0
c01: range [0, 3], default 0x1
c02: range [0, 3], default 0x1
c03: range [0, 3], default 0x0
c10: range [0, 3], default 0x0
c11: range [0, 3], default 0x1
c12: range [0, 3], default 0x1
c13: range [0, 3], default 0x0
norm_factor: Normalization factor, range [0, 4], default 2 0 - divide by 1 1 - divide by 2 2 - divide by 4 3 - divide by 8 4 - divide by 16
reserved0: reserved
bin_output: Down sampling on Luma channel in two optional modes 0 - Bin output 4.2.0 (default), 1 output 4.2.2.
reserved1: reserved

Description

Above are 4x2 filter coefficients for chroma output downscaling.

struct ipu3_uapi_yuvp1_chnr_enable_config¶: Chroma noise reduction enable

Definition:

struct ipu3_uapi_yuvp1_chnr_enable_config {
    __u32 enable:1;
    __u32 yuv_mode:1;
    __u32 reserved0:14;
    __u32 col_size:12;
    __u32 reserved1:4;
};

Members

enable: enable/disable chroma noise reduction
yuv_mode: 0 - YUV420, 1 - YUV422
reserved0: reserved
col_size: number of columns in the frame, max width is 2560
reserved1: reserved

struct ipu3_uapi_yuvp1_chnr_coring_config¶: Coring thresholds for UV

Definition:

struct ipu3_uapi_yuvp1_chnr_coring_config {
    __u32 u:13;
    __u32 reserved0:3;
    __u32 v:13;
    __u32 reserved1:3;
};

Members

u: U coring level, u0.13, range [0.0, 1.0], default 0.0
reserved0: reserved
v: V coring level, u0.13, range [0.0, 1.0], default 0.0
reserved1: reserved

struct ipu3_uapi_yuvp1_chnr_sense_gain_config¶: Chroma noise reduction gains

Definition:

struct ipu3_uapi_yuvp1_chnr_sense_gain_config {
    __u32 vy:8;
    __u32 vu:8;
    __u32 vv:8;
    __u32 reserved0:8;
    __u32 hy:8;
    __u32 hu:8;
    __u32 hv:8;
    __u32 reserved1:8;
};

Members

vy: Sensitivity of horizontal edge of Y, default 100
vu: Sensitivity of horizontal edge of U, default 100
vv: Sensitivity of horizontal edge of V, default 100
reserved0: reserved
hy: Sensitivity of vertical edge of Y, default 50
hu: Sensitivity of vertical edge of U, default 50
hv: Sensitivity of vertical edge of V, default 50
reserved1: reserved

Description

All sensitivity gain parameters have precision u13.0, range [0, 8191].

struct ipu3_uapi_yuvp1_chnr_iir_fir_config¶: Chroma IIR/FIR filter config

Definition:

struct ipu3_uapi_yuvp1_chnr_iir_fir_config {
    __u32 fir_0h:6;
    __u32 reserved0:2;
    __u32 fir_1h:6;
    __u32 reserved1:2;
    __u32 fir_2h:6;
    __u32 dalpha_clip_val:9;
    __u32 reserved2:1;
};

Members

fir_0h: Value of center tap in horizontal FIR, range [0, 32], default 8.
reserved0: reserved
fir_1h: Value of distance 1 in horizontal FIR, range [0, 32], default 12.
reserved1: reserved
fir_2h: Value of distance 2 tap in horizontal FIR, range [0, 32], default 0.
dalpha_clip_val: weight for previous row in IIR, range [1, 256], default 0.
reserved2: reserved

struct ipu3_uapi_yuvp1_chnr_config¶: Chroma noise reduction config

Definition:

struct ipu3_uapi_yuvp1_chnr_config {
    struct ipu3_uapi_yuvp1_chnr_enable_config enable;
    struct ipu3_uapi_yuvp1_chnr_coring_config coring;
    struct ipu3_uapi_yuvp1_chnr_sense_gain_config sense_gain;
    struct ipu3_uapi_yuvp1_chnr_iir_fir_config iir_fir;
};

Members

enable: chroma noise reduction enable, see ipu3_uapi_yuvp1_chnr_enable_config
coring: coring config for chroma noise reduction, see ipu3_uapi_yuvp1_chnr_coring_config
sense_gain: sensitivity config for chroma noise reduction, see ipu3_uapi_yuvp1_chnr_sense_gain_config
iir_fir: iir and fir config for chroma noise reduction, see ipu3_uapi_yuvp1_chnr_iir_fir_config

struct ipu3_uapi_yuvp1_y_ee_nr_lpf_config¶: Luma(Y) edge enhancement low-pass filter coefficients

Definition:

struct ipu3_uapi_yuvp1_y_ee_nr_lpf_config {
    __u32 a_diag:5;
    __u32 reserved0:3;
    __u32 a_periph:5;
    __u32 reserved1:3;
    __u32 a_cent:5;
    __u32 reserved2:9;
    __u32 enable:1;
};

Members

a_diag: Smoothing diagonal coefficient, u5.0.
reserved0: reserved
a_periph: Image smoothing perpherial, u5.0.
reserved1: reserved
a_cent: Image Smoothing center coefficient, u5.0.
reserved2: reserved
enable: 0: Y_EE_NR disabled, output = input; 1: Y_EE_NR enabled.

struct ipu3_uapi_yuvp1_y_ee_nr_sense_config¶: Luma(Y) edge enhancement noise reduction sensitivity gains

Definition:

struct ipu3_uapi_yuvp1_y_ee_nr_sense_config {
    __u32 edge_sense_0:13;
    __u32 reserved0:3;
    __u32 delta_edge_sense:13;
    __u32 reserved1:3;
    __u32 corner_sense_0:13;
    __u32 reserved2:3;
    __u32 delta_corner_sense:13;
    __u32 reserved3:3;
};

Members

edge_sense_0: Sensitivity of edge in dark area. u13.0, default 8191.
reserved0: reserved
delta_edge_sense: Difference in the sensitivity of edges between the bright and dark areas. u13.0, default 0.
reserved1: reserved
corner_sense_0: Sensitivity of corner in dark area. u13.0, default 0.
reserved2: reserved
delta_corner_sense: Difference in the sensitivity of corners between the bright and dark areas. u13.0, default 8191.
reserved3: reserved

struct ipu3_uapi_yuvp1_y_ee_nr_gain_config¶: Luma(Y) edge enhancement noise reduction gain config

Definition:

struct ipu3_uapi_yuvp1_y_ee_nr_gain_config {
    __u32 gain_pos_0:5;
    __u32 reserved0:3;
    __u32 delta_gain_posi:5;
    __u32 reserved1:3;
    __u32 gain_neg_0:5;
    __u32 reserved2:3;
    __u32 delta_gain_neg:5;
    __u32 reserved3:3;
};

Members

gain_pos_0: Gain for positive edge in dark area. u5.0, [0, 16], default 2.
reserved0: reserved
delta_gain_posi: Difference in the gain of edges between the bright and dark areas for positive edges. u5.0, [0, 16], default 0.
reserved1: reserved
gain_neg_0: Gain for negative edge in dark area. u5.0, [0, 16], default 8.
reserved2: reserved
delta_gain_neg: Difference in the gain of edges between the bright and dark areas for negative edges. u5.0, [0, 16], default 0.
reserved3: reserved

struct ipu3_uapi_yuvp1_y_ee_nr_clip_config¶: Luma(Y) edge enhancement noise reduction clipping config

Definition:

struct ipu3_uapi_yuvp1_y_ee_nr_clip_config {
    __u32 clip_pos_0:5;
    __u32 reserved0:3;
    __u32 delta_clip_posi:5;
    __u32 reserved1:3;
    __u32 clip_neg_0:5;
    __u32 reserved2:3;
    __u32 delta_clip_neg:5;
    __u32 reserved3:3;
};

Members

clip_pos_0: Limit of positive edge in dark area u5, value [0, 16], default 8.
reserved0: reserved
delta_clip_posi: Difference in the limit of edges between the bright and dark areas for positive edges. u5, value [0, 16], default 8.
reserved1: reserved
clip_neg_0: Limit of negative edge in dark area u5, value [0, 16], default 8.
reserved2: reserved
delta_clip_neg: Difference in the limit of edges between the bright and dark areas for negative edges. u5, value [0, 16], default 8.
reserved3: reserved

struct ipu3_uapi_yuvp1_y_ee_nr_frng_config¶: Luma(Y) edge enhancement noise reduction fringe config

Definition:

struct ipu3_uapi_yuvp1_y_ee_nr_frng_config {
    __u32 gain_exp:4;
    __u32 reserved0:28;
    __u32 min_edge:13;
    __u32 reserved1:3;
    __u32 lin_seg_param:4;
    __u32 reserved2:4;
    __u32 t1:1;
    __u32 t2:1;
    __u32 reserved3:6;
};

Members

gain_exp: Common exponent of gains, u4, [0, 8], default 2.
reserved0: reserved
min_edge: Threshold for edge and smooth stitching, u13.
reserved1: reserved
lin_seg_param: Power of LinSeg, u4.
reserved2: reserved
t1: Parameter for enabling/disabling the edge enhancement, u1.0, [0, 1], default 1.
t2: Parameter for enabling/disabling the smoothing, u1.0, [0, 1], default 1.
reserved3: reserved

struct ipu3_uapi_yuvp1_y_ee_nr_diag_config¶: Luma(Y) edge enhancement noise reduction diagonal config

Definition:

struct ipu3_uapi_yuvp1_y_ee_nr_diag_config {
    __u32 diag_disc_g:4;
    __u32 reserved0:4;
    __u32 hvw_hor:4;
    __u32 dw_hor:4;
    __u32 hvw_diag:4;
    __u32 dw_diag:4;
    __u32 reserved1:8;
};

Members

diag_disc_g: Coefficient that prioritize diagonal edge direction on horizontal or vertical for final enhancement. u4.0, [1, 15], default 1.
reserved0: reserved
hvw_hor: Weight of horizontal/vertical edge enhancement for hv edge. u2.2, [1, 15], default 4.
dw_hor: Weight of diagonal edge enhancement for hv edge. u2.2, [1, 15], default 1.
hvw_diag: Weight of horizontal/vertical edge enhancement for diagonal edge. u2.2, [1, 15], default 1.
dw_diag: Weight of diagonal edge enhancement for diagonal edge. u2.2, [1, 15], default 4.
reserved1: reserved

struct ipu3_uapi_yuvp1_y_ee_nr_fc_coring_config¶: Luma(Y) edge enhancement noise reduction false color correction (FCC) coring config

Definition:

struct ipu3_uapi_yuvp1_y_ee_nr_fc_coring_config {
    __u32 pos_0:13;
    __u32 reserved0:3;
    __u32 pos_delta:13;
    __u32 reserved1:3;
    __u32 neg_0:13;
    __u32 reserved2:3;
    __u32 neg_delta:13;
    __u32 reserved3:3;
};

Members

pos_0: Gain for positive edge in dark, u13.0, [0, 16], default 0.
reserved0: reserved
pos_delta: Gain for positive edge in bright, value: pos_0 + pos_delta <=16 u13.0, default 0.
reserved1: reserved
neg_0: Gain for negative edge in dark area, u13.0, range [0, 16], default 0.
reserved2: reserved
neg_delta: Gain for negative edge in bright area. neg_0 + neg_delta <=16 u13.0, default 0.
reserved3: reserved

Description

Coring is a simple soft thresholding technique.

struct ipu3_uapi_yuvp1_y_ee_nr_config¶: Edge enhancement and noise reduction

Definition:

struct ipu3_uapi_yuvp1_y_ee_nr_config {
    struct ipu3_uapi_yuvp1_y_ee_nr_lpf_config lpf;
    struct ipu3_uapi_yuvp1_y_ee_nr_sense_config sense;
    struct ipu3_uapi_yuvp1_y_ee_nr_gain_config gain;
    struct ipu3_uapi_yuvp1_y_ee_nr_clip_config clip;
    struct ipu3_uapi_yuvp1_y_ee_nr_frng_config frng;
    struct ipu3_uapi_yuvp1_y_ee_nr_diag_config diag;
    struct ipu3_uapi_yuvp1_y_ee_nr_fc_coring_config fc_coring;
};

Members

lpf: low-pass filter config. See ipu3_uapi_yuvp1_y_ee_nr_lpf_config
sense: sensitivity config. See ipu3_uapi_yuvp1_y_ee_nr_sense_config
gain: gain config as defined in ipu3_uapi_yuvp1_y_ee_nr_gain_config
clip: clip config as defined in ipu3_uapi_yuvp1_y_ee_nr_clip_config
frng: fringe config as defined in ipu3_uapi_yuvp1_y_ee_nr_frng_config
diag: diagonal edge config. See ipu3_uapi_yuvp1_y_ee_nr_diag_config
fc_coring: coring config for fringe control. See ipu3_uapi_yuvp1_y_ee_nr_fc_coring_config

struct ipu3_uapi_yuvp2_tcc_gen_control_static_config¶: Total color correction general control config

Definition:

struct ipu3_uapi_yuvp2_tcc_gen_control_static_config {
    __u32 en:1;
    __u32 blend_shift:3;
    __u32 gain_according_to_y_only:1;
    __u32 reserved0:11;
    __s32 gamma:5;
    __u32 reserved1:3;
    __s32 delta:5;
    __u32 reserved2:3;
};

Members

en: 0 - TCC disabled. Output = input 1 - TCC enabled.
blend_shift: blend shift, Range[3, 4], default NA.
gain_according_to_y_only: 0: Gain is calculated according to YUV, 1: Gain is calculated according to Y only
reserved0: reserved
gamma: Final blending coefficients. Values[-16, 16], default NA.
reserved1: reserved
delta: Final blending coefficients. Values[-16, 16], default NA.
reserved2: reserved

struct ipu3_uapi_yuvp2_tcc_macc_elem_static_config¶: Total color correction multi-axis color control (MACC) config

Definition:

struct ipu3_uapi_yuvp2_tcc_macc_elem_static_config {
    __s32 a:12;
    __u32 reserved0:4;
    __s32 b:12;
    __u32 reserved1:4;
    __s32 c:12;
    __u32 reserved2:4;
    __s32 d:12;
    __u32 reserved3:4;
};

Members

a: a coefficient for 2x2 MACC conversion matrix.
reserved0: reserved
b: b coefficient 2x2 MACC conversion matrix.
reserved1: reserved
c: c coefficient for 2x2 MACC conversion matrix.
reserved2: reserved
d: d coefficient for 2x2 MACC conversion matrix.
reserved3: reserved

struct ipu3_uapi_yuvp2_tcc_macc_table_static_config¶: Total color correction multi-axis color control (MACC) table array

Definition:

struct ipu3_uapi_yuvp2_tcc_macc_table_static_config {
    struct ipu3_uapi_yuvp2_tcc_macc_elem_static_config entries[IPU3_UAPI_YUVP2_TCC_MACC_TABLE_ELEMENTS];
};

Members

entries: config for multi axis color correction, as specified by ipu3_uapi_yuvp2_tcc_macc_elem_static_config

struct ipu3_uapi_yuvp2_tcc_inv_y_lut_static_config¶: Total color correction inverse y lookup table

Definition:

struct ipu3_uapi_yuvp2_tcc_inv_y_lut_static_config {
    __u16 entries[IPU3_UAPI_YUVP2_TCC_INV_Y_LUT_ELEMENTS];
};

Members

entries: lookup table for inverse y estimation, and use it to estimate the ratio between luma and chroma. Chroma by approximate the absolute value of the radius on the chroma plane (R = sqrt(u^2+v^2) ) and luma by approximate by 1/Y.

struct ipu3_uapi_yuvp2_tcc_gain_pcwl_lut_static_config¶: Total color correction lookup table for PCWL

Definition:

struct ipu3_uapi_yuvp2_tcc_gain_pcwl_lut_static_config {
    __u16 entries[IPU3_UAPI_YUVP2_TCC_GAIN_PCWL_LUT_ELEMENTS];
};

Members

entries: lookup table for gain piece wise linear transformation (PCWL)

struct ipu3_uapi_yuvp2_tcc_r_sqr_lut_static_config¶: Total color correction lookup table for r square root

Definition:

struct ipu3_uapi_yuvp2_tcc_r_sqr_lut_static_config {
    __s16 entries[IPU3_UAPI_YUVP2_TCC_R_SQR_LUT_ELEMENTS];
};

Members

entries: lookup table for r square root estimation

struct ipu3_uapi_yuvp2_tcc_static_config¶: Total color correction static

Definition:

struct ipu3_uapi_yuvp2_tcc_static_config {
    struct ipu3_uapi_yuvp2_tcc_gen_control_static_config gen_control;
    struct ipu3_uapi_yuvp2_tcc_macc_table_static_config macc_table;
    struct ipu3_uapi_yuvp2_tcc_inv_y_lut_static_config inv_y_lut;
    struct ipu3_uapi_yuvp2_tcc_gain_pcwl_lut_static_config gain_pcwl;
    struct ipu3_uapi_yuvp2_tcc_r_sqr_lut_static_config r_sqr_lut;
};

Members

gen_control: general config for Total Color Correction
macc_table: config for multi axis color correction
inv_y_lut: lookup table for inverse y estimation
gain_pcwl: lookup table for gain PCWL
r_sqr_lut: lookup table for r square root estimation.

struct ipu3_uapi_anr_transform_config¶: Advanced noise reduction transform

Definition:

struct ipu3_uapi_anr_transform_config {
    __u32 enable:1;
    __u32 adaptive_treshhold_en:1;
    __u32 reserved1:30;
    __u8 reserved2[44];
    struct ipu3_uapi_anr_alpha alpha[3];
    struct ipu3_uapi_anr_beta beta[3];
    struct ipu3_uapi_anr_plane_color color[3];
    __u16 sqrt_lut[IPU3_UAPI_ANR_LUT_SIZE];
    __s16 xreset:13;
    __u16 reserved3:3;
    __s16 yreset:13;
    __u16 reserved4:3;
    __u32 x_sqr_reset:24;
    __u32 r_normfactor:5;
    __u32 reserved5:3;
    __u32 y_sqr_reset:24;
    __u32 gain_scale:8;
};

Members

enable: advanced noise reduction enabled.
adaptive_treshhold_en: On IPU3, adaptive threshold is always enabled.
reserved1: reserved
reserved2: reserved
alpha: using following defaults: 13, 13, 13, 13, 0, 0, 0, 0 11, 11, 11, 11, 0, 0, 0, 0 14, 14, 14, 14, 0, 0, 0, 0
beta: use following defaults: 24, 24, 24, 24 21, 20, 20, 21 25, 25, 25, 25
color: use defaults defined in driver/media/pci/intel/ipu3-tables.c
sqrt_lut: 11 bits per element, values = [724 768 810 849 887 923 958 991 1024 1056 1116 1145 1173 1201 1086 1228 1254 1280 1305 1330 1355 1379 1402 1425 1448]
xreset: Reset value of X for r^2 calculation Value: col_start-X_center Constraint: Xreset + FrameWdith=4095 Xreset= -4095, default -1632.
reserved3: reserved
yreset: Reset value of Y for r^2 calculation Value: row_start-Y_center Constraint: Yreset + FrameHeight=4095 Yreset= -4095, default -1224.
reserved4: reserved
x_sqr_reset: Reset value of X^2 for r^2 calculation Value = (Xreset)^2
r_normfactor: Normalization factor for R. Default 14.
reserved5: reserved
y_sqr_reset: Reset value of Y^2 for r^2 calculation Value = (Yreset)^2
gain_scale: Parameter describing shading gain as a function of distance from the image center. A single value per frame, loaded by the driver. Default 115.

struct ipu3_uapi_anr_stitch_pyramid¶: ANR stitch pyramid

Definition:

struct ipu3_uapi_anr_stitch_pyramid {
    __u32 entry0:6;
    __u32 entry1:6;
    __u32 entry2:6;
    __u32 reserved:14;
};

Members

entry0: pyramid LUT entry0, range [0x0, 0x3f]
entry1: pyramid LUT entry1, range [0x0, 0x3f]
entry2: pyramid LUT entry2, range [0x0, 0x3f]
reserved: reserved

struct ipu3_uapi_anr_stitch_config¶: ANR stitch config

Definition:

struct ipu3_uapi_anr_stitch_config {
    __u32 anr_stitch_en;
    __u8 reserved[44];
    struct ipu3_uapi_anr_stitch_pyramid pyramid[IPU3_UAPI_ANR_PYRAMID_SIZE];
};

Members

anr_stitch_en: enable stitch. Enabled with 1.
reserved: reserved
pyramid: pyramid table as defined by ipu3_uapi_anr_stitch_pyramid default values: { 1, 3, 5 }, { 7, 7, 5 }, { 3, 1, 3 }, { 9, 15, 21 }, { 21, 15, 9 }, { 3, 5, 15 }, { 25, 35, 35 }, { 25, 15, 5 }, { 7, 21, 35 }, { 49, 49, 35 }, { 21, 7, 7 }, { 21, 35, 49 }, { 49, 35, 21 }, { 7, 5, 15 }, { 25, 35, 35 }, { 25, 15, 5 }, { 3, 9, 15 }, { 21, 21, 15 }, { 9, 3, 1 }, { 3, 5, 7 }, { 7, 5, 3}, { 1 }

struct ipu3_uapi_anr_config¶: ANR config

Definition:

struct ipu3_uapi_anr_config {
    struct ipu3_uapi_anr_transform_config transform ;
    struct ipu3_uapi_anr_stitch_config stitch ;
};

Members

transform: advanced noise reduction transform config as specified by ipu3_uapi_anr_transform_config
stitch: create 4x4 patch from 4 surrounding 8x8 patches.

struct ipu3_uapi_acc_param¶: Accelerator cluster parameters

Definition:

struct ipu3_uapi_acc_param {
    struct ipu3_uapi_bnr_static_config bnr;
    struct ipu3_uapi_bnr_static_config_green_disparity green_disparity ;
    struct ipu3_uapi_dm_config dm ;
    struct ipu3_uapi_ccm_mat_config ccm ;
    struct ipu3_uapi_gamma_config gamma ;
    struct ipu3_uapi_csc_mat_config csc ;
    struct ipu3_uapi_cds_params cds ;
    struct ipu3_uapi_shd_config shd ;
    struct ipu3_uapi_yuvp1_iefd_config iefd ;
    struct ipu3_uapi_yuvp1_yds_config yds_c0 ;
    struct ipu3_uapi_yuvp1_chnr_config chnr_c0 ;
    struct ipu3_uapi_yuvp1_y_ee_nr_config y_ee_nr ;
    struct ipu3_uapi_yuvp1_yds_config yds ;
    struct ipu3_uapi_yuvp1_chnr_config chnr ;
    struct ipu3_uapi_yuvp1_yds_config yds2 ;
    struct ipu3_uapi_yuvp2_tcc_static_config tcc ;
    struct ipu3_uapi_anr_config anr;
    struct ipu3_uapi_awb_fr_config_s awb_fr;
    struct ipu3_uapi_ae_config ae;
    struct ipu3_uapi_af_config_s af;
    struct ipu3_uapi_awb_config awb;
};

Members

bnr: parameters for bayer noise reduction static config. See ipu3_uapi_bnr_static_config
green_disparity: disparity static config between gr and gb channel. See ipu3_uapi_bnr_static_config_green_disparity
dm: de-mosaic config. See ipu3_uapi_dm_config
ccm: color correction matrix. See ipu3_uapi_ccm_mat_config
gamma: gamma correction config. See ipu3_uapi_gamma_config
csc: color space conversion matrix. See ipu3_uapi_csc_mat_config
cds: color down sample config. See ipu3_uapi_cds_params
shd: lens shading correction config. See ipu3_uapi_shd_config
iefd: Image enhancement filter and denoise config. ipu3_uapi_yuvp1_iefd_config
yds_c0: y down scaler config. ipu3_uapi_yuvp1_yds_config
chnr_c0: chroma noise reduction config. ipu3_uapi_yuvp1_chnr_config
y_ee_nr: y edge enhancement and noise reduction config. ipu3_uapi_yuvp1_y_ee_nr_config
yds: y down scaler config. See ipu3_uapi_yuvp1_yds_config
chnr: chroma noise reduction config. See ipu3_uapi_yuvp1_chnr_config
yds2: y channel down scaler config. See ipu3_uapi_yuvp1_yds_config
tcc: total color correction config as defined in struct ipu3_uapi_yuvp2_tcc_static_config
anr: advanced noise reduction config.See ipu3_uapi_anr_config
awb_fr: AWB filter response config. See ipu3_uapi_awb_fr_config
ae: auto exposure config As specified by ipu3_uapi_ae_config
af: auto focus config. As specified by ipu3_uapi_af_config
awb: auto white balance config. As specified by ipu3_uapi_awb_config

Description

ACC refers to the HW cluster containing all Fixed Functions (FFs). Each FF implements a specific algorithm.

struct ipu3_uapi_isp_lin_vmem_params¶: Linearization parameters

Definition:

struct ipu3_uapi_isp_lin_vmem_params {
    __s16 lin_lutlow_gr[IPU3_UAPI_LIN_LUT_SIZE];
    __s16 lin_lutlow_r[IPU3_UAPI_LIN_LUT_SIZE];
    __s16 lin_lutlow_b[IPU3_UAPI_LIN_LUT_SIZE];
    __s16 lin_lutlow_gb[IPU3_UAPI_LIN_LUT_SIZE];
    __s16 lin_lutdif_gr[IPU3_UAPI_LIN_LUT_SIZE];
    __s16 lin_lutdif_r[IPU3_UAPI_LIN_LUT_SIZE];
    __s16 lin_lutdif_b[IPU3_UAPI_LIN_LUT_SIZE];
    __s16 lin_lutdif_gb[IPU3_UAPI_LIN_LUT_SIZE];
};

Members

lin_lutlow_gr: linearization look-up table for GR channel interpolation.
lin_lutlow_r: linearization look-up table for R channel interpolation.
lin_lutlow_b: linearization look-up table for B channel interpolation.
lin_lutlow_gb: linearization look-up table for GB channel interpolation. lin_lutlow_gr / lin_lutlow_r / lin_lutlow_b / lin_lutlow_gb <= LIN_MAX_VALUE - 1.
lin_lutdif_gr: lin_lutlow_gr[i+1] - lin_lutlow_gr[i].
lin_lutdif_r: lin_lutlow_r[i+1] - lin_lutlow_r[i].
lin_lutdif_b: lin_lutlow_b[i+1] - lin_lutlow_b[i].
lin_lutdif_gb: lin_lutlow_gb[i+1] - lin_lutlow_gb[i].

struct ipu3_uapi_isp_tnr3_vmem_params¶: Temporal noise reduction vector memory parameters

Definition:

struct ipu3_uapi_isp_tnr3_vmem_params {
    __u16 slope[IPU3_UAPI_ISP_TNR3_VMEM_LEN];
    __u16 reserved1[IPU3_UAPI_ISP_VEC_ELEMS - IPU3_UAPI_ISP_TNR3_VMEM_LEN];
    __u16 sigma[IPU3_UAPI_ISP_TNR3_VMEM_LEN];
    __u16 reserved2[IPU3_UAPI_ISP_VEC_ELEMS - IPU3_UAPI_ISP_TNR3_VMEM_LEN];
};

Members

slope: slope setting in interpolation curve for temporal noise reduction.
reserved1: reserved
sigma: knee point setting in interpolation curve for temporal noise reduction.
reserved2: reserved

struct ipu3_uapi_isp_tnr3_params¶: Temporal noise reduction v3 parameters

Definition:

struct ipu3_uapi_isp_tnr3_params {
    __u32 knee_y1;
    __u32 knee_y2;
    __u32 maxfb_y;
    __u32 maxfb_u;
    __u32 maxfb_v;
    __u32 round_adj_y;
    __u32 round_adj_u;
    __u32 round_adj_v;
    __u32 ref_buf_select;
};

Members

knee_y1: Knee point TNR3 assumes standard deviation of Y,U and V at Y1 are TnrY1_Sigma_Y, U and V.
knee_y2: Knee point TNR3 assumes standard deviation of Y,U and V at Y2 are TnrY2_Sigma_Y, U and V.
maxfb_y: Max feedback gain for Y
maxfb_u: Max feedback gain for U
maxfb_v: Max feedback gain for V
round_adj_y: rounding Adjust for Y
round_adj_u: rounding Adjust for U
round_adj_v: rounding Adjust for V
ref_buf_select: selection of the reference frame buffer to be used.

struct ipu3_uapi_isp_xnr3_vmem_params¶: Extreme noise reduction v3 vector memory parameters

Definition:

struct ipu3_uapi_isp_xnr3_vmem_params {
    __u16 x[IPU3_UAPI_ISP_VEC_ELEMS];
    __u16 a[IPU3_UAPI_ISP_VEC_ELEMS];
    __u16 b[IPU3_UAPI_ISP_VEC_ELEMS];
    __u16 c[IPU3_UAPI_ISP_VEC_ELEMS];
};

Members

x: xnr3 parameters.
a: xnr3 parameters.
b: xnr3 parameters.
c: xnr3 parameters.

struct ipu3_uapi_xnr3_alpha_params¶: Extreme noise reduction v3 alpha tuning parameters

Definition:

struct ipu3_uapi_xnr3_alpha_params {
    __u32 y0;
    __u32 u0;
    __u32 v0;
    __u32 ydiff;
    __u32 udiff;
    __u32 vdiff;
};

Members

y0: Sigma for Y range similarity in dark area.
u0: Sigma for U range similarity in dark area.
v0: Sigma for V range similarity in dark area.
ydiff: Sigma difference for Y between bright area and dark area.
udiff: Sigma difference for U between bright area and dark area.
vdiff: Sigma difference for V between bright area and dark area.

struct ipu3_uapi_xnr3_coring_params¶: Extreme noise reduction v3 coring parameters

Definition:

struct ipu3_uapi_xnr3_coring_params {
    __u32 u0;
    __u32 v0;
    __u32 udiff;
    __u32 vdiff;
};

Members

u0: Coring Threshold of U channel in dark area.
v0: Coring Threshold of V channel in dark area.
udiff: Threshold difference of U channel between bright and dark area.
vdiff: Threshold difference of V channel between bright and dark area.

struct ipu3_uapi_xnr3_blending_params¶: Blending factor

Definition:

struct ipu3_uapi_xnr3_blending_params {
    __u32 strength;
};

Members

strength: The factor for blending output with input. This is tuning parameterHigher values lead to more aggressive XNR operation.

struct ipu3_uapi_isp_xnr3_params¶: Extreme noise reduction v3 parameters

Definition:

struct ipu3_uapi_isp_xnr3_params {
    struct ipu3_uapi_xnr3_alpha_params alpha;
    struct ipu3_uapi_xnr3_coring_params coring;
    struct ipu3_uapi_xnr3_blending_params blending;
};

Members

alpha: parameters for xnr3 alpha. See ipu3_uapi_xnr3_alpha_params
coring: parameters for xnr3 coring. See ipu3_uapi_xnr3_coring_params
blending: parameters for xnr3 blending. See ipu3_uapi_xnr3_blending_params

struct ipu3_uapi_obgrid_param¶: Optical black level compensation parameters

Definition:

struct ipu3_uapi_obgrid_param {
    __u16 gr;
    __u16 r;
    __u16 b;
    __u16 gb;
};

Members

gr: Grid table values for color GR
r: Grid table values for color R
b: Grid table values for color B
gb: Grid table values for color GB

Description

Black level is different for red, green, and blue channels. So black level compensation is different per channel.

struct ipu3_uapi_flags¶: bits to indicate which pipeline needs update

Definition:

struct ipu3_uapi_flags {
    __u32 gdc:1;
    __u32 obgrid:1;
    __u32 reserved1:30;
    __u32 acc_bnr:1;
    __u32 acc_green_disparity:1;
    __u32 acc_dm:1;
    __u32 acc_ccm:1;
    __u32 acc_gamma:1;
    __u32 acc_csc:1;
    __u32 acc_cds:1;
    __u32 acc_shd:1;
    __u32 reserved2:2;
    __u32 acc_iefd:1;
    __u32 acc_yds_c0:1;
    __u32 acc_chnr_c0:1;
    __u32 acc_y_ee_nr:1;
    __u32 acc_yds:1;
    __u32 acc_chnr:1;
    __u32 acc_ytm:1;
    __u32 acc_yds2:1;
    __u32 acc_tcc:1;
    __u32 acc_dpc:1;
    __u32 acc_bds:1;
    __u32 acc_anr:1;
    __u32 acc_awb_fr:1;
    __u32 acc_ae:1;
    __u32 acc_af:1;
    __u32 acc_awb:1;
    __u32 reserved3:4;
    __u32 lin_vmem_params:1;
    __u32 tnr3_vmem_params:1;
    __u32 xnr3_vmem_params:1;
    __u32 tnr3_dmem_params:1;
    __u32 xnr3_dmem_params:1;
    __u32 reserved4:1;
    __u32 obgrid_param:1;
    __u32 reserved5:25;
};

Members

gdc: 0 = no update, 1 = update.
obgrid: 0 = no update, 1 = update.
reserved1: Not used.
acc_bnr: 0 = no update, 1 = update.
acc_green_disparity: 0 = no update, 1 = update.
acc_dm: 0 = no update, 1 = update.
acc_ccm: 0 = no update, 1 = update.
acc_gamma: 0 = no update, 1 = update.
acc_csc: 0 = no update, 1 = update.
acc_cds: 0 = no update, 1 = update.
acc_shd: 0 = no update, 1 = update.
reserved2: Not used.
acc_iefd: 0 = no update, 1 = update.
acc_yds_c0: 0 = no update, 1 = update.
acc_chnr_c0: 0 = no update, 1 = update.
acc_y_ee_nr: 0 = no update, 1 = update.
acc_yds: 0 = no update, 1 = update.
acc_chnr: 0 = no update, 1 = update.
acc_ytm: 0 = no update, 1 = update.
acc_yds2: 0 = no update, 1 = update.
acc_tcc: 0 = no update, 1 = update.
acc_dpc: 0 = no update, 1 = update.
acc_bds: 0 = no update, 1 = update.
acc_anr: 0 = no update, 1 = update.
acc_awb_fr: 0 = no update, 1 = update.
acc_ae: 0 = no update, 1 = update.
acc_af: 0 = no update, 1 = update.
acc_awb: 0 = no update, 1 = update.
reserved3: Not used.
lin_vmem_params: 0 = no update, 1 = update.
tnr3_vmem_params: 0 = no update, 1 = update.
xnr3_vmem_params: 0 = no update, 1 = update.
tnr3_dmem_params: 0 = no update, 1 = update.
xnr3_dmem_params: 0 = no update, 1 = update.
reserved4: Not used.
obgrid_param: 0 = no update, 1 = update.
reserved5: Not used.

struct ipu3_uapi_params¶: V4L2_META_FMT_IPU3_PARAMS

Definition:

struct ipu3_uapi_params {
    struct ipu3_uapi_flags use ;
    struct ipu3_uapi_acc_param acc_param;
    struct ipu3_uapi_isp_lin_vmem_params lin_vmem_params;
    struct ipu3_uapi_isp_tnr3_vmem_params tnr3_vmem_params;
    struct ipu3_uapi_isp_xnr3_vmem_params xnr3_vmem_params;
    struct ipu3_uapi_isp_tnr3_params tnr3_dmem_params;
    struct ipu3_uapi_isp_xnr3_params xnr3_dmem_params;
    struct ipu3_uapi_obgrid_param obgrid_param;
};

Members

use: select which parameters to apply, see ipu3_uapi_flags
acc_param: ACC parameters, as specified by ipu3_uapi_acc_param
lin_vmem_params: linearization VMEM, as specified by ipu3_uapi_isp_lin_vmem_params
tnr3_vmem_params: tnr3 VMEM as specified by ipu3_uapi_isp_tnr3_vmem_params
xnr3_vmem_params: xnr3 VMEM as specified by ipu3_uapi_isp_xnr3_vmem_params
tnr3_dmem_params: tnr3 DMEM as specified by ipu3_uapi_isp_tnr3_params
xnr3_dmem_params: xnr3 DMEM as specified by ipu3_uapi_isp_xnr3_params
obgrid_param: obgrid parameters as specified by ipu3_uapi_obgrid_param

Description

The video queue “parameters” is of format V4L2_META_FMT_IPU3_PARAMS. This is a “single plane” v4l2_meta_format using V4L2_BUF_TYPE_META_OUTPUT.

struct ipu3_uapi_params as defined below contains a lot of parameters and ipu3_uapi_flags selects which parameters to apply.

The Linux Kernel

Contents

This Page

2.13.2. V4L2_META_FMT_IPU3_PARAMS (‘ip3p’), V4L2_META_FMT_IPU3_3A (‘ip3s’)¶

2.13.2.1. 3A statistics¶

2.13.2.2. Pipeline parameters¶

2.13.2.3. Intel IPU3 ImgU uAPI data types¶