Re: [PATCH v2 02/11] media: rkisp1: Add user space ABI definitions

[Jacob Chen <jacob-chen@iotwrt.com>]

Hi Hans,

2017-11-27 18:26 GMT+08:00 Hans Verkuil <hverkuil@xs4all.nl>:
> On 11/24/2017 03:36 AM, Jacob Chen wrote:
>> From: Jeffy Chen <jeffy.chen@rock-chips.com>
>>
>> Add the header for userspace
>
> I gather that this effectively documents the metadata?
>
> I recommend using kernel-doc formatting here.
>
> One thing I immediately noticed is that these structures will have a
> different layout for 32 or 64 architectures. Which is a problem if you compile
> for 32 bit on a 64 bit kernel on the rk3399.
>

Thanks.....We didn't even notice that.
I will add "__attribute__ ((packed))"  to each sturct.

> I think you need to be very careful how you define these structures.
>
> Are these parameters documented in a datasheet? If so, then add a reference
> to that datasheet. Is it publicly available or do you need an NDA to get it?
>

It can't be published, but i will try to add document for each parameters.

>>
>> Signed-off-by: Jeffy Chen <jeffy.chen@rock-chips.com>
>> Signed-off-by: Jacob Chen <jacob2.chen@rock-chips.com>
>> ---
>>  include/uapi/linux/rkisp1-config.h | 554 +++++++++++++++++++++++++++++++++++++
>>  1 file changed, 554 insertions(+)
>>  create mode 100644 include/uapi/linux/rkisp1-config.h
>>
>> diff --git a/include/uapi/linux/rkisp1-config.h b/include/uapi/linux/rkisp1-config.h
>> new file mode 100644
>> index 000000000000..a801fbc9ef47
>> --- /dev/null
>> +++ b/include/uapi/linux/rkisp1-config.h
>> @@ -0,0 +1,554 @@
>> +/*
>> + * Rockchip isp1 driver
>> + *
>> + * Copyright (C) 2017 Rockchip Electronics Co., Ltd.
>> + *
>> + * This software is available to you under a choice of one of two
>> + * licenses.  You may choose to be licensed under the terms of the GNU
>> + * General Public License (GPL) Version 2, available from the file
>> + * COPYING in the main directory of this source tree, or the
>> + * OpenIB.org BSD license below:
>> + *
>> + *     Redistribution and use in source and binary forms, with or
>> + *     without modification, are permitted provided that the following
>> + *     conditions are met:
>> + *
>> + *      - Redistributions of source code must retain the above
>> + *        copyright notice, this list of conditions and the following
>> + *        disclaimer.
>> + *
>> + *      - Redistributions in binary form must reproduce the above
>> + *        copyright notice, this list of conditions and the following
>> + *        disclaimer in the documentation and/or other materials
>> + *        provided with the distribution.
>> + *
>> + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
>> + * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
>> + * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
>> + * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
>> + * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
>> + * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
>> + * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
>> + * SOFTWARE.
>> + */
>> +
>> +#ifndef _UAPI_RKISP1_CONFIG_H
>> +#define _UAPI_RKISP1_CONFIG_H
>> +
>> +#include <linux/types.h>
>> +#include <linux/v4l2-controls.h>
>> +
>> +#define CIFISP_MODULE_DPCC              (1 << 0)
>> +#define CIFISP_MODULE_BLS               (1 << 1)
>> +#define CIFISP_MODULE_SDG               (1 << 2)
>> +#define CIFISP_MODULE_HST               (1 << 3)
>> +#define CIFISP_MODULE_LSC               (1 << 4)
>> +#define CIFISP_MODULE_AWB_GAIN          (1 << 5)
>> +#define CIFISP_MODULE_FLT               (1 << 6)
>> +#define CIFISP_MODULE_BDM               (1 << 7)
>> +#define CIFISP_MODULE_CTK               (1 << 8)
>> +#define CIFISP_MODULE_GOC               (1 << 9)
>> +#define CIFISP_MODULE_CPROC             (1 << 10)
>> +#define CIFISP_MODULE_AFC               (1 << 11)
>> +#define CIFISP_MODULE_AWB               (1 << 12)
>> +#define CIFISP_MODULE_IE                (1 << 13)
>> +#define CIFISP_MODULE_AEC               (1 << 14)
>> +#define CIFISP_MODULE_WDR               (1 << 15)
>> +#define CIFISP_MODULE_DPF               (1 << 16)
>> +#define CIFISP_MODULE_DPF_STRENGTH      (1 << 17)
>> +
>> +#define CIFISP_CTK_COEFF_MAX            0x100
>> +#define CIFISP_CTK_OFFSET_MAX           0x800
>> +
>> +#define CIFISP_AE_MEAN_MAX              25
>> +#define CIFISP_HIST_BIN_N_MAX           16
>> +#define CIFISP_AFM_MAX_WINDOWS          3
>> +#define CIFISP_DEGAMMA_CURVE_SIZE       17
>> +
>> +#define CIFISP_BDM_MAX_TH               0xFF
>> +
>> +/* maximum value for horizontal start address */
>> +#define CIFISP_BLS_START_H_MAX             0x00000FFF
>> +/* maximum value for horizontal stop address */
>> +#define CIFISP_BLS_STOP_H_MAX              0x00000FFF
>> +/* maximum value for vertical start address */
>> +#define CIFISP_BLS_START_V_MAX             0x00000FFF
>> +/* maximum value for vertical stop address */
>> +#define CIFISP_BLS_STOP_V_MAX              0x00000FFF
>> +/* maximum is 2^18 = 262144*/
>> +#define CIFISP_BLS_SAMPLES_MAX             0x00000012
>> +/* maximum value for fixed black level */
>> +#define CIFISP_BLS_FIX_SUB_MAX             0x00000FFF
>> +/* minimum value for fixed black level */
>> +#define CIFISP_BLS_FIX_SUB_MIN             0xFFFFF000
>> +/* 13 bit range (signed)*/
>> +#define CIFISP_BLS_FIX_MASK                0x00001FFF
>> +/* AWB */
>> +#define CIFISP_AWB_MAX_GRID                1
>> +#define CIFISP_AWB_MAX_FRAMES              7
>> +
>> +/* Gamma out*/
>> +/* Maximum number of color samples supported */
>> +#define CIFISP_GAMMA_OUT_MAX_SAMPLES       17
>> +
>> +/* LSC */
>> +#define CIFISP_LSC_GRAD_TBL_SIZE           8
>> +#define CIFISP_LSC_SIZE_TBL_SIZE           8
>> +/*
>> + * The following matches the tuning process,
>> + * not the max capabilities of the chip.
>> + * Last value unused.
>> + */
>> +#define      CIFISP_LSC_DATA_TBL_SIZE           290
>> +/* HIST */
>> +/* Last 3 values unused. */
>> +#define CIFISP_HISTOGRAM_WEIGHT_GRIDS_SIZE 28
>> +
>> +/* DPCC */
>> +#define CIFISP_DPCC_METHODS_MAX       3
>> +
>> +/* DPF */
>> +#define CIFISP_DPF_MAX_NLF_COEFFS      17
>> +#define CIFISP_DPF_MAX_SPATIAL_COEFFS  6
>> +
>> +/* measurement types */
>> +#define CIFISP_STAT_AWB           (1 << 0)
>> +#define CIFISP_STAT_AUTOEXP       (1 << 1)
>> +#define CIFISP_STAT_AFM_FIN       (1 << 2)
>> +#define CIFISP_STAT_HIST          (1 << 3)
>> +
>> +enum cifisp_histogram_mode {
>> +     CIFISP_HISTOGRAM_MODE_DISABLE,
>> +     CIFISP_HISTOGRAM_MODE_RGB_COMBINED,
>> +     CIFISP_HISTOGRAM_MODE_R_HISTOGRAM,
>> +     CIFISP_HISTOGRAM_MODE_G_HISTOGRAM,
>> +     CIFISP_HISTOGRAM_MODE_B_HISTOGRAM,
>> +     CIFISP_HISTOGRAM_MODE_Y_HISTOGRAM
>> +};
>> +
>> +enum cifisp_exp_meas_mode {
>> +/* < Y = 16 + 0.25R + 0.5G + 0.1094B */
>> +     CIFISP_EXP_MEASURING_MODE_0,
>> +/* < Y = (R + G + B) x (85/256) */
>> +     CIFISP_EXP_MEASURING_MODE_1,
>> +};
>> +
>> +enum cifisp_exp_ctrl_auotostop {
>> +     CIFISP_EXP_CTRL_AUTOSTOP_0 = 0,
>> +     CIFISP_EXP_CTRL_AUTOSTOP_1 = 1,
>> +};
>> +
>> +struct cifisp_window {
>> +     unsigned short h_offs;
>> +     unsigned short v_offs;
>> +     unsigned short h_size;
>> +     unsigned short v_size;
>> +};
>> +
>> +enum cifisp_awb_mode_type {
>> +     CIFISP_AWB_MODE_MANUAL,
>> +     CIFISP_AWB_MODE_RGB,
>> +     CIFISP_AWB_MODE_YCBCR
>> +};
>> +
>> +enum cifisp_flt_mode {
>> +     CIFISP_FLT_STATIC_MODE,
>> +     CIFISP_FLT_DYNAMIC_MODE
>> +};
>> +
>> +/*
>> + * BLS fixed subtraction values. The values will be subtracted from the sensor
>> + * values. Therefore a negative value means addition instead of subtraction!
>> + */
>> +struct cifisp_bls_fixed_val {
>> +     /*! Fixed (signed!) subtraction value for Bayer pattern R. */
>
> What's the exact fixed point format used here?
>
>> +     signed short r;
>> +     /*! Fixed (signed!) subtraction value for Bayer pattern Gr. */
>> +     signed short gr;
>> +     /*! Fixed (signed!) subtraction value for Bayer pattern Gb. */
>> +     signed short gb;
>> +     /*! Fixed (signed!) subtraction value for Bayer pattern B. */
>> +     signed short b;
>> +};
>> +
>> +/* Configuration used by black level subtraction */
>> +struct cifisp_bls_config {
>> +     /*
>> +      * Automatic mode activated means that the measured values
>> +      * are subtracted.Otherwise the fixed subtraction
>> +      * values will be subtracted.
>> +      */
>> +     bool enable_auto;
>> +     unsigned char en_windows;
>> +     struct cifisp_window bls_window1;       /* < Measurement window 1. */
>> +     struct cifisp_window bls_window2;       /* !< Measurement window 2 */
>> +     /*
>> +      * Set amount of measured pixels for each Bayer position
>> +      * (A, B,C and D) to 2^bls_samples.
>> +      */
>> +     unsigned char bls_samples;
>> +     /* !< Fixed subtraction values. */
>> +     struct cifisp_bls_fixed_val fixed_val;
>> +};
>> +
>> +struct cifisp_dpcc_methods_config {
>> +     unsigned int method;
>> +     unsigned int line_thresh;
>> +     unsigned int line_mad_fac;
>> +     unsigned int pg_fac;
>> +     unsigned int rnd_thresh;
>> +     unsigned int rg_fac;
>> +};
>> +
>> +struct cifisp_dpcc_config {
>> +     unsigned int mode;
>> +     unsigned int output_mode;
>> +     unsigned int set_use;
>> +     struct cifisp_dpcc_methods_config methods[CIFISP_DPCC_METHODS_MAX];
>> +     unsigned int ro_limits;
>> +     unsigned int rnd_offs;
>> +};
>> +
>> +struct cifisp_gamma_corr_curve {
>> +     unsigned short gamma_y[CIFISP_DEGAMMA_CURVE_SIZE];
>> +};
>> +
>> +struct cifisp_gamma_curve_x_axis_pnts {
>> +     unsigned int gamma_dx0;
>> +     unsigned int gamma_dx1;
>> +};
>> +
>> +/* Configuration used by sensor degamma */
>> +struct cifisp_sdg_config {
>> +     struct cifisp_gamma_corr_curve curve_r;
>> +     struct cifisp_gamma_corr_curve curve_g;
>> +     struct cifisp_gamma_corr_curve curve_b;
>> +     struct cifisp_gamma_curve_x_axis_pnts xa_pnts;
>> +};
>> +
>> +/* Configuration used by Lens shading correction */
>> +struct cifisp_lsc_config {
>> +     unsigned int r_data_tbl[CIFISP_LSC_DATA_TBL_SIZE];
>> +     unsigned int gr_data_tbl[CIFISP_LSC_DATA_TBL_SIZE];
>> +     unsigned int gb_data_tbl[CIFISP_LSC_DATA_TBL_SIZE];
>> +     unsigned int b_data_tbl[CIFISP_LSC_DATA_TBL_SIZE];
>> +
>> +     unsigned int x_grad_tbl[CIFISP_LSC_GRAD_TBL_SIZE];
>> +     unsigned int y_grad_tbl[CIFISP_LSC_GRAD_TBL_SIZE];
>> +
>> +     unsigned int x_size_tbl[CIFISP_LSC_SIZE_TBL_SIZE];
>> +     unsigned int y_size_tbl[CIFISP_LSC_SIZE_TBL_SIZE];
>> +     unsigned short config_width;
>> +     unsigned short config_height;
>> +};
>> +
>> +struct cifisp_ie_config {
>> +     enum v4l2_colorfx effect;
>> +     unsigned short color_sel;
>> +     /* 3x3 Matrix Coefficients for Emboss Effect 1 */
>> +     unsigned short eff_mat_1;
>> +     /* 3x3 Matrix Coefficients for Emboss Effect 2 */
>> +     unsigned short eff_mat_2;
>> +     /* 3x3 Matrix Coefficients for Emboss 3/Sketch 1 */
>> +     unsigned short eff_mat_3;
>> +     /* 3x3 Matrix Coefficients for Sketch Effect 2 */
>> +     unsigned short eff_mat_4;
>> +     /* 3x3 Matrix Coefficients for Sketch Effect 3 */
>> +     unsigned short eff_mat_5;
>> +     /* Chrominance increment values of tint (used for sepia effect) */
>> +     unsigned short eff_tint;
>> +};
>> +
>> +struct cifisp_cproc_config {
>> +     unsigned char c_out_range;
>> +     unsigned char y_in_range;
>> +     unsigned char y_out_range;
>> +     unsigned char contrast;
>> +     unsigned char brightness;
>> +     unsigned char sat;
>> +     unsigned char hue;
>> +};
>> +
>> +/* Configuration used by auto white balance */
>> +struct cifisp_awb_meas_config {
>> +     /*
>> +      * white balance measurement window (in pixels)
>> +      * Note: currently the h and v offsets are mapped to grid offsets
>> +      */
>> +     struct cifisp_window awb_wnd;
>> +     enum cifisp_awb_mode_type awb_mode;
>> +     /*
>> +      * only pixels values < max_y contribute to awb measurement
>> +      * (set to 0 to disable this feature)
>> +      */
>> +     unsigned char max_y;
>> +     /* only pixels values > min_y contribute to awb measurement */
>> +     unsigned char min_y;
>> +     /*
>> +      * Chrominance sum maximum value, only consider pixels with Cb+Cr
>> +      * smaller than threshold for awb measurements
>> +      */
>> +     unsigned char max_csum;
>> +     /*
>> +      * Chrominance minimum value, only consider pixels with Cb/Cr
>> +      * each greater than threshold value for awb measurements
>> +      */
>> +     unsigned char min_c;
>> +     /*
>> +      * number of frames - 1 used for mean value calculation
>> +      * (ucFrames=0 means 1 Frame)
>> +      */
>> +     unsigned char frames;
>> +     /* reference Cr value for AWB regulation, target for AWB */
>> +     unsigned char awb_ref_cr;
>> +     /* reference Cb value for AWB regulation, target for AWB */
>> +     unsigned char awb_ref_cb;
>> +     bool enable_ymax_cmp;
>> +};
>> +
>> +struct cifisp_awb_gain_config {
>> +     unsigned short gain_red;
>> +     unsigned short gain_green_r;
>> +     unsigned short gain_blue;
>> +     unsigned short gain_green_b;
>> +};
>> +
>> +/* Configuration used by ISP filtering */
>> +struct cifisp_flt_config {
>> +     enum cifisp_flt_mode mode;      /* ISP_FILT_MODE register fields */
>> +     unsigned char grn_stage1;       /* ISP_FILT_MODE register fields */
>> +     unsigned char chr_h_mode;       /* ISP_FILT_MODE register fields */
>> +     unsigned char chr_v_mode;       /* ISP_FILT_MODE register fields */
>> +     unsigned int thresh_bl0;
>> +     unsigned int thresh_bl1;
>> +     unsigned int thresh_sh0;
>> +     unsigned int thresh_sh1;
>> +     unsigned int lum_weight;
>> +     unsigned int fac_sh1;
>> +     unsigned int fac_sh0;
>> +     unsigned int fac_mid;
>> +     unsigned int fac_bl0;
>> +     unsigned int fac_bl1;
>> +};
>> +
>> +/* Configuration used by Bayer DeMosaic */
>> +struct cifisp_bdm_config {
>> +     unsigned char demosaic_th;
>> +};
>> +
>> +/* Configuration used by Cross Talk correction */
>> +struct cifisp_ctk_config {
>> +     unsigned short coeff0;
>> +     unsigned short coeff1;
>> +     unsigned short coeff2;
>> +     unsigned short coeff3;
>> +     unsigned short coeff4;
>> +     unsigned short coeff5;
>> +     unsigned short coeff6;
>> +     unsigned short coeff7;
>> +     unsigned short coeff8;
>> +     /* offset for the crosstalk correction matrix */
>> +     unsigned short ct_offset_r;
>> +     unsigned short ct_offset_g;
>> +     unsigned short ct_offset_b;
>> +};
>> +
>> +enum cifisp_goc_mode {
>> +     CIFISP_GOC_MODE_LOGARITHMIC,
>> +     CIFISP_GOC_MODE_EQUIDISTANT
>> +};
>> +
>> +/* Configuration used by Gamma Out correction */
>> +struct cifisp_goc_config {
>> +     enum cifisp_goc_mode mode;
>> +     unsigned short gamma_y[CIFISP_GAMMA_OUT_MAX_SAMPLES];
>> +};
>> +
>> +/* Configuration used by Histogram */
>> +struct cifisp_hst_config {
>> +     enum cifisp_histogram_mode mode;
>> +     unsigned char histogram_predivider;
>> +     struct cifisp_window meas_window;
>> +     unsigned char hist_weight[CIFISP_HISTOGRAM_WEIGHT_GRIDS_SIZE];
>> +};
>> +
>> +/* Configuration used by Auto Exposure Control */
>> +struct cifisp_aec_config {
>> +     enum cifisp_exp_meas_mode mode;
>> +     __u32 autostop;
>> +     struct cifisp_window meas_window;
>> +};
>> +
>> +struct cifisp_afc_config {
>> +     unsigned char num_afm_win;      /* max CIFISP_AFM_MAX_WINDOWS */
>> +     struct cifisp_window afm_win[CIFISP_AFM_MAX_WINDOWS];
>> +     unsigned int thres;
>> +     unsigned int var_shift;
>> +};
>> +
>> +enum cifisp_dpf_gain_usage {
>> +/* don't use any gains in preprocessing stage */
>> +     CIFISP_DPF_GAIN_USAGE_DISABLED,
>> +/* use only the noise function gains  from registers DPF_NF_GAIN_R, ... */
>> +     CIFISP_DPF_GAIN_USAGE_NF_GAINS,
>> +/* use only the gains from LSC module */
>> +     CIFISP_DPF_GAIN_USAGE_LSC_GAINS,
>> +/* use the moise function gains and the gains from LSC module */
>> +     CIFISP_DPF_GAIN_USAGE_NF_LSC_GAINS,
>> +/* use only the gains from AWB module */
>> +     CIFISP_DPF_GAIN_USAGE_AWB_GAINS,
>> +/* use the gains from AWB and LSC module */
>> +     CIFISP_DPF_GAIN_USAGE_AWB_LSC_GAINS,
>> +/* upper border (only for an internal evaluation) */
>> +     CIFISP_DPF_GAIN_USAGE_MAX
>> +};
>> +
>> +enum cifisp_dpf_rb_filtersize {
>> +/* red and blue filter kernel size 13x9 (means 7x5 active pixel) */
>> +     CIFISP_DPF_RB_FILTERSIZE_13x9,
>> +/* red and blue filter kernel size 9x9 (means 5x5 active pixel) */
>> +     CIFISP_DPF_RB_FILTERSIZE_9x9,
>> +};
>> +
>> +enum cifisp_dpf_nll_scale_mode {
>> +/* use a linear scaling */
>> +     CIFISP_NLL_SCALE_LINEAR,
>> +/* use a logarithmic scaling */
>> +     CIFISP_NLL_SCALE_LOGARITHMIC,
>> +};
>> +
>> +struct cifisp_dpf_nll {
>> +     unsigned short coeff[CIFISP_DPF_MAX_NLF_COEFFS];
>> +     enum cifisp_dpf_nll_scale_mode scale_mode;
>> +};
>> +
>> +struct cifisp_dpf_rb_flt {
>> +     enum cifisp_dpf_rb_filtersize fltsize;
>> +     unsigned char spatial_coeff[CIFISP_DPF_MAX_SPATIAL_COEFFS];
>> +     bool r_enable;
>> +     bool b_enable;
>> +};
>> +
>> +struct cifisp_dpf_g_flt {
>> +     unsigned char spatial_coeff[CIFISP_DPF_MAX_SPATIAL_COEFFS];
>> +     bool gr_enable;
>> +     bool gb_enable;
>> +};
>> +
>> +struct cifisp_dpf_gain {
>> +     enum cifisp_dpf_gain_usage mode;
>> +     unsigned short nf_r_gain;
>> +     unsigned short nf_b_gain;
>> +     unsigned short nf_gr_gain;
>> +     unsigned short nf_gb_gain;
>> +};
>> +
>> +struct cifisp_dpf_config {
>> +     struct cifisp_dpf_gain gain;
>> +     struct cifisp_dpf_g_flt g_flt;
>> +     struct cifisp_dpf_rb_flt rb_flt;
>> +     struct cifisp_dpf_nll nll;
>> +};
>> +
>> +struct cifisp_dpf_strength_config {
>> +     unsigned char r;
>> +     unsigned char g;
>> +     unsigned char b;
>> +};
>> +
>> +struct cifisp_isp_other_cfg {
>> +     struct cifisp_dpcc_config dpcc_config;
>> +     struct cifisp_bls_config bls_config;
>> +     struct cifisp_sdg_config sdg_config;
>> +     struct cifisp_lsc_config lsc_config;
>> +     struct cifisp_awb_gain_config awb_gain_config;
>> +     struct cifisp_flt_config flt_config;
>> +     struct cifisp_bdm_config bdm_config;
>> +     struct cifisp_ctk_config ctk_config;
>> +     struct cifisp_goc_config goc_config;
>> +     struct cifisp_dpf_config dpf_config;
>> +     struct cifisp_dpf_strength_config dpf_strength_config;
>> +     /* post process configs, including hue, sharpness, brightness, contrast, color effect */
>> +     /* TODO: removed from here ? set by standard v4l2 controls ? */
>> +     struct cifisp_cproc_config cproc_config;
>> +     struct cifisp_ie_config ie_config;
>> +};
>> +
>> +struct cifisp_isp_meas_cfg {
>> +     struct cifisp_awb_meas_config awb_meas_config;
>> +     struct cifisp_hst_config hst_config;
>> +     struct cifisp_aec_config aec_config;
>> +     struct cifisp_afc_config afc_config;
>> +};
>> +
>> +struct rkisp1_isp_params_cfg {
>> +     /* mask the enable bits of which module  should be updated */
>> +     unsigned int module_en_update;
>> +     /* mask the enable value of each module, only update the module which correspond
>> +       * bit was set in module_en_update
>> +       */
>> +     unsigned int module_ens;
>> +     /* mask the config bits of which module  should be updated */
>> +     unsigned int module_cfg_update;
>> +
>> +     struct cifisp_isp_meas_cfg meas;
>> +     struct cifisp_isp_other_cfg others;
>> +};
>> +
>> +/* measurement statistics */
>> +
>> +struct cifisp_awb_meas {
>> +     unsigned int cnt;
>> +     unsigned char mean_y_or_g;
>> +     unsigned char mean_cb_or_b;
>> +     unsigned char mean_cr_or_r;
>> +};
>> +
>> +struct cifisp_awb_stat {
>> +     struct cifisp_awb_meas awb_mean[CIFISP_AWB_MAX_GRID];
>> +};
>> +
>> +struct cifisp_hist_stat {
>> +     unsigned short hist_bins[CIFISP_HIST_BIN_N_MAX];
>> +};
>> +
>> +/*! BLS mean measured values */
>> +struct cifisp_bls_meas_val {
>> +     /*! Mean measured value for Bayer pattern R. */
>> +     unsigned short meas_r;
>> +     /*! Mean measured value for Bayer pattern Gr. */
>> +     unsigned short meas_gr;
>> +     /*! Mean measured value for Bayer pattern Gb. */
>> +     unsigned short meas_gb;
>> +     /*! Mean measured value for Bayer pattern B. */
>> +     unsigned short meas_b;
>> +};
>> +
>> +struct cifisp_ae_stat {
>> +     unsigned char exp_mean[CIFISP_AE_MEAN_MAX];
>> +     struct cifisp_bls_meas_val bls_val;     /* available wit exposure results */
>> +};
>> +
>> +struct cifisp_af_meas_val {
>> +     unsigned int sum;
>> +     unsigned int lum;
>> +};
>> +
>> +struct cifisp_af_stat {
>> +     struct cifisp_af_meas_val window[CIFISP_AFM_MAX_WINDOWS];
>> +};
>> +
>> +struct cifisp_stat {
>> +     struct cifisp_awb_stat awb;
>> +     struct cifisp_ae_stat ae;
>> +     struct cifisp_af_stat af;
>> +     struct cifisp_hist_stat hist;
>> +};
>> +
>> +struct rkisp1_stat_buffer {
>> +     unsigned int meas_type;
>> +     unsigned int frame_id;
>> +     struct cifisp_stat params;
>> +};
>> +
>> +#endif /* _UAPI_RKISP1_CONFIG_H */
>>
>
> You do need to document more of this. If the datasheet is publicly available
> you can get away with referring to the relevant sections of that datasheet.
>
> Regards,
>
>         Hans