2.13.3. V4L2_META_FMT_RK_ISP1_PARAMS (‘rk1p’), V4L2_META_FMT_RK_ISP1_STAT_3A (‘rk1s’)

2.13.3.1. Configuration parameters

The configuration parameters are passed to the rkisp1_params metadata output video node, using the v4l2_meta_format interface. The buffer contains a single instance of the C structure rkisp1_params_cfg defined in rkisp1-config.h. So the structure can be obtained from the buffer by:

struct rkisp1_params_cfg *params = (struct rkisp1_params_cfg*) buffer;

2.13.3.2. 3A and histogram statistics

The ISP1 device collects different statistics over an input Bayer frame. Those statistics are obtained from the rkisp1_stats metadata capture video node, using the v4l2_meta_format interface. The buffer contains a single instance of the C structure rkisp1_stat_buffer defined in rkisp1-config.h. So the structure can be obtained from the buffer by:

struct rkisp1_stat_buffer *stats = (struct rkisp1_stat_buffer*) buffer;

The statistics collected are Exposure, AWB (Auto-white balance), Histogram and AF (Auto-focus). See rkisp1_stat_buffer for details of the statistics.

The 3A statistics and configuration parameters described here are usually consumed and produced by dedicated user space libraries that comprise the important tuning tools using software control loop.

2.13.3.3. rkisp1 uAPI data types

enum rkisp1_cif_isp_version

ISP variants

Constants

RKISP1_V10
used at least in rk3288 and rk3399
RKISP1_V11
declared in the original vendor code, but not used
RKISP1_V12
used at least in rk3326 and px30
RKISP1_V13
used at least in rk1808
enum rkisp1_cif_isp_exp_ctrl_autostop

stop modes

Constants

RKISP1_CIF_ISP_EXP_CTRL_AUTOSTOP_0
continuous measurement
RKISP1_CIF_ISP_EXP_CTRL_AUTOSTOP_1
stop measuring after a complete frame
enum rkisp1_cif_isp_exp_meas_mode

Exposure measure mode

Constants

RKISP1_CIF_ISP_EXP_MEASURING_MODE_0
Y = 16 + 0.25R + 0.5G + 0.1094B
RKISP1_CIF_ISP_EXP_MEASURING_MODE_1
Y = (R + G + B) x (85/256)
struct rkisp1_cif_isp_window

measurement window.

Definition

struct rkisp1_cif_isp_window {
  __u16 h_offs;
  __u16 v_offs;
  __u16 h_size;
  __u16 v_size;
};

Members

h_offs
the horizontal offset of the window from the left of the frame in pixels.
v_offs
the vertical offset of the window from the top of the frame in pixels.
h_size
the horizontal size of the window in pixels
v_size
the vertical size of the window in pixels.

Description

Measurements are calculated per window inside the frame. This struct represents a window for a measurement.

struct rkisp1_cif_isp_bls_fixed_val

BLS fixed subtraction values

Definition

struct rkisp1_cif_isp_bls_fixed_val {
  __s16 r;
  __s16 gr;
  __s16 gb;
  __s16 b;
};

Members

r
Fixed (signed!) subtraction value for Bayer pattern R
gr
Fixed (signed!) subtraction value for Bayer pattern Gr
gb
Fixed (signed!) subtraction value for Bayer pattern Gb
b
Fixed (signed!) subtraction value for Bayer pattern B

Description

The values will be subtracted from the sensor values. Therefore a negative value means addition instead of subtraction!

struct rkisp1_cif_isp_bls_config

Configuration used by black level subtraction

Definition

struct rkisp1_cif_isp_bls_config {
  __u8 enable_auto;
  __u8 en_windows;
  struct rkisp1_cif_isp_window bls_window1;
  struct rkisp1_cif_isp_window bls_window2;
  __u8 bls_samples;
  struct rkisp1_cif_isp_bls_fixed_val fixed_val;
};

Members

enable_auto
Automatic mode activated means that the measured values are subtracted. Otherwise the fixed subtraction values will be subtracted.
en_windows
enabled window
bls_window1
Measurement window 1 size
bls_window2
Measurement window 2 size
bls_samples
Set amount of measured pixels for each Bayer position (A, B,C and D) to 2^bls_samples.
fixed_val
Fixed subtraction values
struct rkisp1_cif_isp_dpcc_methods_config

Methods Configuration used by DPCC

Definition

struct rkisp1_cif_isp_dpcc_methods_config {
  __u32 method;
  __u32 line_thresh;
  __u32 line_mad_fac;
  __u32 pg_fac;
  __u32 rnd_thresh;
  __u32 rg_fac;
};

Members

method
Method enable bits
line_thresh
Line threshold
line_mad_fac
Line MAD factor
pg_fac
Peak gradient factor
rnd_thresh
Rank Neighbor Difference threshold
rg_fac
Rank gradient factor

Description

Methods Configuration used by Defect Pixel Cluster Correction

struct rkisp1_cif_isp_dpcc_config

Configuration used by DPCC

Definition

struct rkisp1_cif_isp_dpcc_config {
  __u32 mode;
  __u32 output_mode;
  __u32 set_use;
  struct rkisp1_cif_isp_dpcc_methods_config methods[RKISP1_CIF_ISP_DPCC_METHODS_MAX];
  __u32 ro_limits;
  __u32 rnd_offs;
};

Members

mode
dpcc output mode
output_mode
whether use hard coded methods
set_use
stage1 methods set
methods
methods config
ro_limits
rank order limits
rnd_offs
differential rank offsets for rank neighbor difference

Description

Configuration used by Defect Pixel Cluster Correction

struct rkisp1_cif_isp_gamma_corr_curve

gamma curve point definition y-axis (output).

Definition

struct rkisp1_cif_isp_gamma_corr_curve {
  __u16 gamma_y[RKISP1_CIF_ISP_DEGAMMA_CURVE_SIZE];
};

Members

gamma_y
the values for the y-axis of gamma curve points. Each value is 12 bit.

Description

The reset values define a linear curve which has the same effect as bypass. Reset values are: gamma_y[0] = 0x0000, gamma_y[1] = 0x0100, … gamma_y[15] = 0x0f00, gamma_y[16] = 0xfff

struct rkisp1_cif_isp_gamma_curve_x_axis_pnts

De-Gamma Curve definition x increments (sampling points). gamma_dx0 is for the lower samples (1-8), gamma_dx1 is for the higher samples (9-16). The reset values for both fields is 0x44444444. This means that each sample is 4 units away from the previous one on the x-axis.

Definition

struct rkisp1_cif_isp_gamma_curve_x_axis_pnts {
  __u32 gamma_dx0;
  __u32 gamma_dx1;
};

Members

gamma_dx0
gamma curve sample points definitions. Bits 0:2 for sample 1. Bit 3 unused. Bits 4:6 for sample 2. bit 7 unused … Bits 28:30 for sample 8. Bit 31 unused
gamma_dx1
gamma curve sample points definitions. Bits 0:2 for sample 9. Bit 3 unused. Bits 4:6 for sample 10. bit 7 unused … Bits 28:30 for sample 16. Bit 31 unused
struct rkisp1_cif_isp_sdg_config

Configuration used by sensor degamma

Definition

struct rkisp1_cif_isp_sdg_config {
  struct rkisp1_cif_isp_gamma_corr_curve curve_r;
  struct rkisp1_cif_isp_gamma_corr_curve curve_g;
  struct rkisp1_cif_isp_gamma_corr_curve curve_b;
  struct rkisp1_cif_isp_gamma_curve_x_axis_pnts xa_pnts;
};

Members

curve_r
gamma curve point definition axis for red
curve_g
gamma curve point definition axis for green
curve_b
gamma curve point definition axis for blue
xa_pnts
x axis increments
struct rkisp1_cif_isp_lsc_config

Configuration used by Lens shading correction

Definition

struct rkisp1_cif_isp_lsc_config {
  __u16 r_data_tbl[RKISP1_CIF_ISP_LSC_SAMPLES_MAX][RKISP1_CIF_ISP_LSC_SAMPLES_MAX];
  __u16 gr_data_tbl[RKISP1_CIF_ISP_LSC_SAMPLES_MAX][RKISP1_CIF_ISP_LSC_SAMPLES_MAX];
  __u16 gb_data_tbl[RKISP1_CIF_ISP_LSC_SAMPLES_MAX][RKISP1_CIF_ISP_LSC_SAMPLES_MAX];
  __u16 b_data_tbl[RKISP1_CIF_ISP_LSC_SAMPLES_MAX][RKISP1_CIF_ISP_LSC_SAMPLES_MAX];
  __u16 x_grad_tbl[RKISP1_CIF_ISP_LSC_SECTORS_TBL_SIZE];
  __u16 y_grad_tbl[RKISP1_CIF_ISP_LSC_SECTORS_TBL_SIZE];
  __u16 x_size_tbl[RKISP1_CIF_ISP_LSC_SECTORS_TBL_SIZE];
  __u16 y_size_tbl[RKISP1_CIF_ISP_LSC_SECTORS_TBL_SIZE];
  __u16 config_width;
  __u16 config_height;
};

Members

r_data_tbl
sample table red
gr_data_tbl
sample table green (red)
gb_data_tbl
sample table green (blue)
b_data_tbl
sample table blue
x_grad_tbl
gradient table x
y_grad_tbl
gradient table y
x_size_tbl
size table x
y_size_tbl
size table y
config_width
not used at the moment
config_height
not used at the moment
struct rkisp1_cif_isp_ie_config

Configuration used by image effects

Definition

struct rkisp1_cif_isp_ie_config {
  __u16 effect;
  __u16 color_sel;
  __u16 eff_mat_1;
  __u16 eff_mat_2;
  __u16 eff_mat_3;
  __u16 eff_mat_4;
  __u16 eff_mat_5;
  __u16 eff_tint;
};

Members

effect
values from ‘enum v4l2_colorfx’. Possible values are: V4L2_COLORFX_SEPIA, V4L2_COLORFX_SET_CBCR, V4L2_COLORFX_AQUA, V4L2_COLORFX_EMBOSS, V4L2_COLORFX_SKETCH, V4L2_COLORFX_BW, V4L2_COLORFX_NEGATIVE
color_sel
bits 0:2 - colors bitmask (001 - blue, 010 - green, 100 - red). bits 8:15 - Threshold value of the RGB colors for the color selection effect.
eff_mat_1
3x3 Matrix Coefficients for Emboss Effect 1
eff_mat_2
3x3 Matrix Coefficients for Emboss Effect 2
eff_mat_3
3x3 Matrix Coefficients for Emboss 3/Sketch 1
eff_mat_4
3x3 Matrix Coefficients for Sketch Effect 2
eff_mat_5
3x3 Matrix Coefficients for Sketch Effect 3
eff_tint
Chrominance increment values of tint (used for sepia effect)
struct rkisp1_cif_isp_cproc_config

Configuration used by Color Processing

Definition

struct rkisp1_cif_isp_cproc_config {
  __u8 c_out_range;
  __u8 y_in_range;
  __u8 y_out_range;
  __u8 contrast;
  __u8 brightness;
  __u8 sat;
  __u8 hue;
};

Members

c_out_range
Chrominance pixel clipping range at output. (0 for limit, 1 for full)
y_in_range
Luminance pixel clipping range at output.
y_out_range
Luminance pixel clipping range at output.
contrast
00~ff, 0.0~1.992
brightness
80~7F, -128~+127
sat
saturation, 00~FF, 0.0~1.992
hue
80~7F, -90~+87.188
struct rkisp1_cif_isp_awb_meas_config

Configuration for the AWB statistics

Definition

struct rkisp1_cif_isp_awb_meas_config {
  struct rkisp1_cif_isp_window awb_wnd;
  __u32 awb_mode;
  __u8 max_y;
  __u8 min_y;
  __u8 max_csum;
  __u8 min_c;
  __u8 frames;
  __u8 awb_ref_cr;
  __u8 awb_ref_cb;
  __u8 enable_ymax_cmp;
};

Members

awb_wnd
white balance measurement window (in pixels)
awb_mode
the awb meas mode. From enum rkisp1_cif_isp_awb_mode_type.
max_y
only pixels values < max_y contribute to awb measurement, set to 0 to disable this feature
min_y
only pixels values > min_y contribute to awb measurement
max_csum
Chrominance sum maximum value, only consider pixels with Cb+Cr, smaller than threshold for awb measurements
min_c
Chrominance minimum value, only consider pixels with Cb/Cr each greater than threshold value for awb measurements
frames
number of frames - 1 used for mean value calculation (ucFrames=0 means 1 Frame)
awb_ref_cr
reference Cr value for AWB regulation, target for AWB
awb_ref_cb
reference Cb value for AWB regulation, target for AWB
enable_ymax_cmp
enable Y_MAX compare (Not valid in RGB measurement mode.)
struct rkisp1_cif_isp_awb_gain_config

Configuration used by auto white balance gain

Definition

struct rkisp1_cif_isp_awb_gain_config {
  __u16 gain_red;
  __u16 gain_green_r;
  __u16 gain_blue;
  __u16 gain_green_b;
};

Members

gain_red
gain value for red component.
gain_green_r
gain value for green component in red line.
gain_blue
gain value for blue component.
gain_green_b
gain value for green component in blue line.

Description

All fields in this struct are 10 bit, where: 0x100h = 1, unsigned integer value, range 0 to 4 with 8 bit fractional part.

out_data_x = ( AWB_GAIN_X * in_data + 128) >> 8

struct rkisp1_cif_isp_flt_config

Configuration used by ISP filtering

Definition

struct rkisp1_cif_isp_flt_config {
  __u32 mode;
  __u8 grn_stage1;
  __u8 chr_h_mode;
  __u8 chr_v_mode;
  __u32 thresh_bl0;
  __u32 thresh_bl1;
  __u32 thresh_sh0;
  __u32 thresh_sh1;
  __u32 lum_weight;
  __u32 fac_sh1;
  __u32 fac_sh0;
  __u32 fac_mid;
  __u32 fac_bl0;
  __u32 fac_bl1;
};

Members

mode
ISP_FILT_MODE register fields (from enum rkisp1_cif_isp_flt_mode)
grn_stage1
Green filter stage 1 select (range 0x0…0x8)
chr_h_mode
Chroma filter horizontal mode
chr_v_mode
Chroma filter vertical mode
thresh_bl0
If thresh_bl1 < sum_grad < thresh_bl0 then fac_bl0 is selected (blurring th)
thresh_bl1
If sum_grad < thresh_bl1 then fac_bl1 is selected (blurring th)
thresh_sh0
If thresh_sh0 < sum_grad < thresh_sh1 then thresh_sh0 is selected (sharpening th)
thresh_sh1
If thresh_sh1 < sum_grad then thresh_sh1 is selected (sharpening th)
lum_weight
Parameters for luminance weight function.
fac_sh1
filter factor for sharp1 level
fac_sh0
filter factor for sharp0 level
fac_mid
filter factor for mid level and for static filter mode
fac_bl0
filter factor for blur 0 level
fac_bl1
filter factor for blur 1 level (max blur)

Description

All 4 threshold fields (thresh_*) are 10 bits. All 6 factor fields (fac_*) are 6 bits.

struct rkisp1_cif_isp_bdm_config

Configuration used by Bayer DeMosaic

Definition

struct rkisp1_cif_isp_bdm_config {
  __u8 demosaic_th;
};

Members

demosaic_th
threshold for bayer demosaicing texture detection
struct rkisp1_cif_isp_ctk_config

Configuration used by Cross Talk correction

Definition

struct rkisp1_cif_isp_ctk_config {
  __u16 coeff[3][3];
  __u16 ct_offset[3];
};

Members

coeff
color correction matrix. Values are 11-bit signed fixed-point numbers with 4 bit integer and 7 bit fractional part, ranging from -8 (0x400) to +7.992 (0x3FF). 0 is represented by 0x000 and a coefficient value of 1 as 0x080.
ct_offset
Red, Green, Blue offsets for the crosstalk correction matrix
struct rkisp1_cif_isp_goc_config

Configuration used by Gamma Out correction

Definition

struct rkisp1_cif_isp_goc_config {
  __u32 mode;
  __u16 gamma_y[RKISP1_CIF_ISP_GAMMA_OUT_MAX_SAMPLES];
};

Members

mode
goc mode (from enum rkisp1_cif_isp_goc_mode)
gamma_y
gamma out curve y-axis for all color components

Description

The number of entries of gamma_y depends on the hardware revision as is reported by the hw_revision field of the struct media_device_info that is returned by ioctl MEDIA_IOC_DEVICE_INFO.

Versions <= V11 have RKISP1_CIF_ISP_GAMMA_OUT_MAX_SAMPLES_V10 entries, versions >= V12 have RKISP1_CIF_ISP_GAMMA_OUT_MAX_SAMPLES_V12 entries. RKISP1_CIF_ISP_GAMMA_OUT_MAX_SAMPLES is equal to the maximum of the two.

struct rkisp1_cif_isp_hst_config

Configuration for Histogram statistics

Definition

struct rkisp1_cif_isp_hst_config {
  __u32 mode;
  __u8 histogram_predivider;
  struct rkisp1_cif_isp_window meas_window;
  __u8 hist_weight[RKISP1_CIF_ISP_HISTOGRAM_WEIGHT_GRIDS_SIZE];
};

Members

mode
histogram mode (from enum rkisp1_cif_isp_histogram_mode)
histogram_predivider
process every stepsize pixel, all other pixels are skipped
meas_window
coordinates of the measure window
hist_weight
weighting factor for sub-windows

Description

The number of entries of hist_weight depends on the hardware revision as is reported by the hw_revision field of the struct media_device_info that is returned by ioctl MEDIA_IOC_DEVICE_INFO.

Versions <= V11 have RKISP1_CIF_ISP_HISTOGRAM_WEIGHT_GRIDS_SIZE_V10 entries, versions >= V12 have RKISP1_CIF_ISP_HISTOGRAM_WEIGHT_GRIDS_SIZE_V12 entries. RKISP1_CIF_ISP_HISTOGRAM_WEIGHT_GRIDS_SIZE is equal to the maximum of the two.

struct rkisp1_cif_isp_aec_config

Configuration for Auto Exposure statistics

Definition

struct rkisp1_cif_isp_aec_config {
  __u32 mode;
  __u32 autostop;
  struct rkisp1_cif_isp_window meas_window;
};

Members

mode
Exposure measure mode (from enum rkisp1_cif_isp_exp_meas_mode)
autostop
stop mode (from enum rkisp1_cif_isp_exp_ctrl_autostop)
meas_window
coordinates of the measure window
struct rkisp1_cif_isp_afc_config

Configuration for the Auto Focus statistics

Definition

struct rkisp1_cif_isp_afc_config {
  __u8 num_afm_win;
  struct rkisp1_cif_isp_window afm_win[RKISP1_CIF_ISP_AFM_MAX_WINDOWS];
  __u32 thres;
  __u32 var_shift;
};

Members

num_afm_win
max RKISP1_CIF_ISP_AFM_MAX_WINDOWS
afm_win
coordinates of the meas window
thres
threshold used for minimizing the influence of noise
var_shift
the number of bits for the shift operation at the end of the calculation chain.
enum rkisp1_cif_isp_dpf_gain_usage

dpf gain usage

Constants

RKISP1_CIF_ISP_DPF_GAIN_USAGE_DISABLED
don’t use any gains in preprocessing stage
RKISP1_CIF_ISP_DPF_GAIN_USAGE_NF_GAINS
use only the noise function gains from registers DPF_NF_GAIN_R, …
RKISP1_CIF_ISP_DPF_GAIN_USAGE_LSC_GAINS
use only the gains from LSC module
RKISP1_CIF_ISP_DPF_GAIN_USAGE_NF_LSC_GAINS
use the noise function gains and the gains from LSC module
RKISP1_CIF_ISP_DPF_GAIN_USAGE_AWB_GAINS
use only the gains from AWB module
RKISP1_CIF_ISP_DPF_GAIN_USAGE_AWB_LSC_GAINS
use the gains from AWB and LSC module
RKISP1_CIF_ISP_DPF_GAIN_USAGE_MAX
upper border (only for an internal evaluation)
enum rkisp1_cif_isp_dpf_rb_filtersize

Red and blue filter sizes

Constants

RKISP1_CIF_ISP_DPF_RB_FILTERSIZE_13x9
red and blue filter kernel size 13x9 (means 7x5 active pixel)
RKISP1_CIF_ISP_DPF_RB_FILTERSIZE_9x9
red and blue filter kernel size 9x9 (means 5x5 active pixel)
enum rkisp1_cif_isp_dpf_nll_scale_mode

dpf noise level scale mode

Constants

RKISP1_CIF_ISP_NLL_SCALE_LINEAR
use a linear scaling
RKISP1_CIF_ISP_NLL_SCALE_LOGARITHMIC
use a logarithmic scaling
struct rkisp1_cif_isp_dpf_nll

Noise level lookup

Definition

struct rkisp1_cif_isp_dpf_nll {
  __u16 coeff[RKISP1_CIF_ISP_DPF_MAX_NLF_COEFFS];
  __u32 scale_mode;
};

Members

coeff
Noise level Lookup coefficient
scale_mode
dpf noise level scale mode (from enum rkisp1_cif_isp_dpf_nll_scale_mode)
struct rkisp1_cif_isp_dpf_rb_flt

Red blue filter config

Definition

struct rkisp1_cif_isp_dpf_rb_flt {
  __u32 fltsize;
  __u8 spatial_coeff[RKISP1_CIF_ISP_DPF_MAX_SPATIAL_COEFFS];
  __u8 r_enable;
  __u8 b_enable;
};

Members

fltsize
The filter size for the red and blue pixels (from enum rkisp1_cif_isp_dpf_rb_filtersize)
spatial_coeff
Spatial weights
r_enable
enable filter processing for red pixels
b_enable
enable filter processing for blue pixels
struct rkisp1_cif_isp_dpf_g_flt

Green filter Configuration

Definition

struct rkisp1_cif_isp_dpf_g_flt {
  __u8 spatial_coeff[RKISP1_CIF_ISP_DPF_MAX_SPATIAL_COEFFS];
  __u8 gr_enable;
  __u8 gb_enable;
};

Members

spatial_coeff
Spatial weights
gr_enable
enable filter processing for green pixels in green/red lines
gb_enable
enable filter processing for green pixels in green/blue lines
struct rkisp1_cif_isp_dpf_gain

Noise function Configuration

Definition

struct rkisp1_cif_isp_dpf_gain {
  __u32 mode;
  __u16 nf_r_gain;
  __u16 nf_b_gain;
  __u16 nf_gr_gain;
  __u16 nf_gb_gain;
};

Members

mode
dpf gain usage (from enum rkisp1_cif_isp_dpf_gain_usage)
nf_r_gain
Noise function Gain that replaces the AWB gain for red pixels
nf_b_gain
Noise function Gain that replaces the AWB gain for blue pixels
nf_gr_gain
Noise function Gain that replaces the AWB gain for green pixels in a red line
nf_gb_gain
Noise function Gain that replaces the AWB gain for green pixels in a blue line
struct rkisp1_cif_isp_dpf_config

Configuration used by De-noising pre-filter

Definition

struct rkisp1_cif_isp_dpf_config {
  struct rkisp1_cif_isp_dpf_gain gain;
  struct rkisp1_cif_isp_dpf_g_flt g_flt;
  struct rkisp1_cif_isp_dpf_rb_flt rb_flt;
  struct rkisp1_cif_isp_dpf_nll nll;
};

Members

gain
noise function gain
g_flt
green filter config
rb_flt
red blue filter config
nll
noise level lookup
struct rkisp1_cif_isp_dpf_strength_config

strength of the filter

Definition

struct rkisp1_cif_isp_dpf_strength_config {
  __u8 r;
  __u8 g;
  __u8 b;
};

Members

r
filter strength of the RED filter
g
filter strength of the GREEN filter
b
filter strength of the BLUE filter
struct rkisp1_cif_isp_isp_other_cfg

Parameters for some blocks in rockchip isp1

Definition

struct rkisp1_cif_isp_isp_other_cfg {
  struct rkisp1_cif_isp_dpcc_config dpcc_config;
  struct rkisp1_cif_isp_bls_config bls_config;
  struct rkisp1_cif_isp_sdg_config sdg_config;
  struct rkisp1_cif_isp_lsc_config lsc_config;
  struct rkisp1_cif_isp_awb_gain_config awb_gain_config;
  struct rkisp1_cif_isp_flt_config flt_config;
  struct rkisp1_cif_isp_bdm_config bdm_config;
  struct rkisp1_cif_isp_ctk_config ctk_config;
  struct rkisp1_cif_isp_goc_config goc_config;
  struct rkisp1_cif_isp_dpf_config dpf_config;
  struct rkisp1_cif_isp_dpf_strength_config dpf_strength_config;
  struct rkisp1_cif_isp_cproc_config cproc_config;
  struct rkisp1_cif_isp_ie_config ie_config;
};

Members

dpcc_config
Defect Pixel Cluster Correction config
bls_config
black level subtraction config
sdg_config
sensor degamma config
lsc_config
Lens Shade config
awb_gain_config
Auto White balance gain config
flt_config
filter config
bdm_config
demosaic config
ctk_config
cross talk config
goc_config
gamma out config
dpf_config
De-noising pre-filter config
dpf_strength_config
dpf strength config
cproc_config
color process config
ie_config
image effects config
struct rkisp1_cif_isp_isp_meas_cfg

Rockchip ISP1 Measure Parameters

Definition

struct rkisp1_cif_isp_isp_meas_cfg {
  struct rkisp1_cif_isp_awb_meas_config awb_meas_config;
  struct rkisp1_cif_isp_hst_config hst_config;
  struct rkisp1_cif_isp_aec_config aec_config;
  struct rkisp1_cif_isp_afc_config afc_config;
};

Members

awb_meas_config
auto white balance config
hst_config
histogram config
aec_config
auto exposure config
afc_config
auto focus config
struct rkisp1_params_cfg

Rockchip ISP1 Input Parameters Meta Data

Definition

struct rkisp1_params_cfg {
  __u32 module_en_update;
  __u32 module_ens;
  __u32 module_cfg_update;
  struct rkisp1_cif_isp_isp_meas_cfg meas;
  struct rkisp1_cif_isp_isp_other_cfg others;
};

Members

module_en_update
mask the enable bits of which module should be updated
module_ens
mask the enable value of each module, only update the module which correspond bit was set in module_en_update
module_cfg_update
mask the config bits of which module should be updated
meas
measurement config
others
other config
struct rkisp1_cif_isp_awb_meas

AWB measured values

Definition

struct rkisp1_cif_isp_awb_meas {
  __u32 cnt;
  __u8 mean_y_or_g;
  __u8 mean_cb_or_b;
  __u8 mean_cr_or_r;
};

Members

cnt
White pixel count, number of “white pixels” found during last measurement
mean_y_or_g
Mean value of Y within window and frames, Green if RGB is selected.
mean_cb_or_b
Mean value of Cb within window and frames, Blue if RGB is selected.
mean_cr_or_r
Mean value of Cr within window and frames, Red if RGB is selected.
struct rkisp1_cif_isp_awb_stat

statistics automatic white balance data

Definition

struct rkisp1_cif_isp_awb_stat {
  struct rkisp1_cif_isp_awb_meas awb_mean[RKISP1_CIF_ISP_AWB_MAX_GRID];
};

Members

awb_mean
Mean measured data
struct rkisp1_cif_isp_bls_meas_val

BLS measured values

Definition

struct rkisp1_cif_isp_bls_meas_val {
  __u16 meas_r;
  __u16 meas_gr;
  __u16 meas_gb;
  __u16 meas_b;
};

Members

meas_r
Mean measured value for Bayer pattern R
meas_gr
Mean measured value for Bayer pattern Gr
meas_gb
Mean measured value for Bayer pattern Gb
meas_b
Mean measured value for Bayer pattern B
struct rkisp1_cif_isp_ae_stat

statistics auto exposure data

Definition

struct rkisp1_cif_isp_ae_stat {
  __u8 exp_mean[RKISP1_CIF_ISP_AE_MEAN_MAX];
  struct rkisp1_cif_isp_bls_meas_val bls_val;
};

Members

exp_mean
Mean luminance value of block xx
bls_val
BLS measured values

Description

The number of entries of exp_mean depends on the hardware revision as is reported by the hw_revision field of the struct media_device_info that is returned by ioctl MEDIA_IOC_DEVICE_INFO.

Versions <= V11 have RKISP1_CIF_ISP_AE_MEAN_MAX_V10 entries, versions >= V12 have RKISP1_CIF_ISP_AE_MEAN_MAX_V12 entries. RKISP1_CIF_ISP_AE_MEAN_MAX is equal to the maximum of the two.

Image is divided into 5x5 blocks on V10 and 9x9 blocks on V12.

struct rkisp1_cif_isp_af_meas_val

AF measured values

Definition

struct rkisp1_cif_isp_af_meas_val {
  __u32 sum;
  __u32 lum;
};

Members

sum
sharpness value
lum
luminance value
struct rkisp1_cif_isp_af_stat

statistics auto focus data

Definition

struct rkisp1_cif_isp_af_stat {
  struct rkisp1_cif_isp_af_meas_val window[RKISP1_CIF_ISP_AFM_MAX_WINDOWS];
};

Members

window
AF measured value of window x

Description

The module measures the sharpness in 3 windows of selectable size via register settings(ISP_AFM_*_A/B/C)

struct rkisp1_cif_isp_hist_stat

statistics histogram data

Definition

struct rkisp1_cif_isp_hist_stat {
  __u32 hist_bins[RKISP1_CIF_ISP_HIST_BIN_N_MAX];
};

Members

hist_bins
measured bin counters. Each bin is a 20 bits unsigned fixed point type. Bits 0-4 are the fractional part and bits 5-19 are the integer part.

Description

The window of the measurements area is divided to 5x5 sub-windows for V10/V11 and to 9x9 sub-windows for V12. The histogram is then computed for each sub-window independently and the final result is a weighted average of the histogram measurements on all sub-windows. The window of the measurements area and the weight of each sub-window are configurable using struct rkisp1_cif_isp_hst_config.

The histogram contains 16 bins in V10/V11 and 32 bins in V12/V13.

The number of entries of hist_bins depends on the hardware revision as is reported by the hw_revision field of the struct media_device_info that is returned by ioctl MEDIA_IOC_DEVICE_INFO.

Versions <= V11 have RKISP1_CIF_ISP_HIST_BIN_N_MAX_V10 entries, versions >= V12 have RKISP1_CIF_ISP_HIST_BIN_N_MAX_V12 entries. RKISP1_CIF_ISP_HIST_BIN_N_MAX is equal to the maximum of the two.

struct rkisp1_cif_isp_stat

Rockchip ISP1 Statistics Data

Definition

struct rkisp1_cif_isp_stat {
  struct rkisp1_cif_isp_awb_stat awb;
  struct rkisp1_cif_isp_ae_stat ae;
  struct rkisp1_cif_isp_af_stat af;
  struct rkisp1_cif_isp_hist_stat hist;
};

Members

awb
statistics data for automatic white balance
ae
statistics data for auto exposure
af
statistics data for auto focus
hist
statistics histogram data
struct rkisp1_stat_buffer

Rockchip ISP1 Statistics Meta Data

Definition

struct rkisp1_stat_buffer {
  __u32 meas_type;
  __u32 frame_id;
  struct rkisp1_cif_isp_stat params;
};

Members

meas_type
measurement types (RKISP1_CIF_ISP_STAT_* definitions)
frame_id
frame ID for sync
params
statistics data